annotate src/dnsbl.cpp @ 136:f4746d8a12a3

add smtp auth rate limits
author carl
date Tue, 26 Sep 2006 13:59:14 -0700
parents f9917ce924a3
children a6190f7798f4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1 /*
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
2
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
3 Copyright (c) 2004, 2005 Carl Byington - 510 Software Group, released
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
4 under the GPL version 2 or any later version at your choice available at
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
5 http://www.fsf.org/licenses/gpl.txt
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
6
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
7 Based on a sample milter Copyright (c) 2000-2003 Sendmail, Inc. and its
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
8 suppliers. Inspired by the DCC by Rhyolite Software
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
9
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
10 -r port The port used to talk to our internal dns resolver processes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
11 -p port The port through which the MTA will connect to this milter.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
12 -t sec The timeout value.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
13 -c Check the config, and print a copy to stdout. Don't start the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
14 milter or do anything with the socket.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
15 -s Stress test by loading and deleting the current config in a loop.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
16 -d increase debug level
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
17 -e f|t Print the results of looking up from address f and to address
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
18 t in the current config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
19
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
20 */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
21
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
22
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
23 // from sendmail sample
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
24 #include <sys/types.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
25 #include <sys/stat.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
26 #include <errno.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
27 #include <sysexits.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
28 #include <unistd.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
29
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
30 // needed for socket io
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
31 #include <sys/ioctl.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
32 #include <net/if.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
33 #include <arpa/inet.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
34 #include <netinet/in.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
35 #include <netinet/tcp.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
36 #include <netdb.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
37 #include <sys/socket.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
38 #include <sys/un.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
39
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
40 // needed for thread
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
41 #include <pthread.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
42
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
43 // needed for std c++ collections
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
44 #include <set>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
45 #include <map>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
46 #include <list>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
47
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
48 // for the dns resolver
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
49 #include <netinet/in.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
50 #include <arpa/nameser.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
51 #include <resolv.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
52
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
53 // misc stuff needed here
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
54 #include <ctype.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
55 #include <syslog.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
56 #include <pwd.h>
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
57 #include <sys/wait.h> /* header for waitpid() and various macros */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
58 #include <signal.h> /* header for signal functions */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
59
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
60 #include "includes.h"
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
61
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
62 static char* dnsbl_version="$Id$";
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
63
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
64
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
65 extern "C" {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
66 #include "libmilter/mfapi.h"
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
67 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
68 sfsistat mlfi_envfrom(SMFICTX *ctx, char **argv);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
69 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **argv);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
70 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
71 sfsistat mlfi_eom(SMFICTX *ctx);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
72 sfsistat mlfi_abort(SMFICTX *ctx);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
73 sfsistat mlfi_close(SMFICTX *ctx);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
74 void sig_chld(int signo);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
75 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
76
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
77 int debug_syslog = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
78 bool syslog_opened = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
79 bool use_syslog = true; // false to printf
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
80 bool loader_run = true; // used to stop the config loader thread
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
81 CONFIG *config = NULL; // protected by the config_mutex
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
82 int generation = 0; // protected by the config_mutex
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
83 const int maxlen = 1000; // used for snprintf buffers
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
84
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
85 pthread_mutex_t config_mutex;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
86 pthread_mutex_t syslog_mutex;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
87 pthread_mutex_t resolve_mutex;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
88 pthread_mutex_t fd_pool_mutex;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
89 pthread_mutex_t rate_mutex;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
90
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
91 std::set<int> fd_pool;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
92 int NULL_SOCKET = -1;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
93 const time_t ERROR_SOCKET_TIME = 60; // number of seconds between attempts to open a socket to the dns resolver process
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
94 char *resolver_port = NULL; // unix domain socket to talk to the dns resolver process
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
95 int resolver_socket = NULL_SOCKET; // socket used to listen for resolver requests
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
96 time_t last_error_time;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
97 int resolver_sock_count = 0; // protected with fd_pool_mutex
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
98 int resolver_pool_size = 0; // protected with fd_pool_mutex
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
99 rcpt_rates rcpt_counts; // protected with rate_mutex
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
100
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
101
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
102 struct ns_map {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
103 // all the strings are owned by the keys/values in the ns_host string map
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
104 string_map ns_host; // nameserver name -> host name that uses this name server
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
105 ns_mapper ns_ip; // nameserver name -> ip address of the name server
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
106 ~ns_map();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
107 void add(char *name, char *refer);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
108 };
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
109
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
110
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
111 ns_map::~ns_map() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
112 for (string_map::iterator i=ns_host.begin(); i!=ns_host.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
113 char *x = (*i).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
114 char *y = (*i).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
115 free(x);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
116 free(y);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
117 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
118 ns_ip.clear();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
119 ns_host.clear();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
120 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
121
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
122
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
123 void ns_map::add(char *name, char *refer) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
124 string_map::iterator i = ns_host.find(name);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
125 if (i != ns_host.end()) return;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
126 char *x = strdup(name);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
127 char *y = strdup(refer);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
128 ns_ip[x] = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
129 ns_host[x] = y;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
130
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
131 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
132
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
133 // packed structure to allow a single socket write to dump the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
134 // length and the following answer. The packing attribute is gcc specific.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
135 struct glommer {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
136 int length;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
137 #ifdef NS_PACKETSZ
115
07e5d4721213 use larger resolver buffer
carl
parents: 94
diff changeset
138 u_char answer[NS_PACKETSZ*4]; // with a resolver, we return resolver answers
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
139 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
140 int answer; // without a resolver, we return a single ip4 address, 0 == no answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
141 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
142 } __attribute__ ((packed));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
143
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
144
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
145 ////////////////////////////////////////////////
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
146 // helper to manipulate recipient counts
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
147 //
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
148 int incr_rcpt_count(char *user);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
149 int incr_rcpt_count(char *user) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
150 pthread_mutex_lock(&rate_mutex);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
151 rcpt_rates::iterator i = rcpt_counts.find(user);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
152 int c = (i == rcpt_counts.end()) ? 0 : (*i).second;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
153 rcpt_counts[user] = c++;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
154 pthread_mutex_unlock(&rate_mutex);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
155 return c;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
156 }
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
157
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
158 ////////////////////////////////////////////////
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
159 // helper to discard the strings held by a context_map
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
160 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
161 void discard(context_map &cm);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
162 void discard(context_map &cm) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
163 for (context_map::iterator i=cm.begin(); i!=cm.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
164 char *x = (*i).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
165 free(x);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
166 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
167 cm.clear();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
168 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
169
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
170
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
171 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
172 // helper to register a string in a context_map
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
173 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
174 void register_string(context_map &cm, char *name, CONTEXT *con);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
175 void register_string(context_map &cm, char *name, CONTEXT *con) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
176 context_map::iterator i = cm.find(name);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
177 if (i != cm.end()) return;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
178 char *x = strdup(name);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
179 cm[x] = con;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
180 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
181
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
182
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
183 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
184 // disconnect the fd from the dns resolver process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
185 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
186 void my_disconnect(int sock, bool decrement = true);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
187 void my_disconnect(int sock, bool decrement) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
188 if (sock != NULL_SOCKET) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
189 if (decrement) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
190 pthread_mutex_lock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
191 resolver_sock_count--;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
192 pthread_mutex_unlock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
193 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
194 shutdown(sock, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
195 close(sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
196 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
197 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
198
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
199
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
200 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
201 // return fd connected to the dns resolver process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
202 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
203 int my_connect();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
204 int my_connect() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
205 // if we have had recent errors, don't even try to open the socket
129
c5cd1261394d ignore smtp connection attempts for 10 minutes when getting connection errors on verify hosts
carl
parents: 128
diff changeset
206 if ((time(NULL) - last_error_time) < ERROR_SOCKET_TIME) return NULL_SOCKET;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
207
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
208 // nothing recent, maybe this time it will work
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
209 int sock = NULL_SOCKET;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
210 sockaddr_un server;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
211 memset(&server, '\0', sizeof(server));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
212 server.sun_family = AF_UNIX;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
213 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
214 sock = socket(AF_UNIX, SOCK_STREAM, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
215 if (sock != NULL_SOCKET) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
216 bool rc = (connect(sock, (sockaddr *)&server, sizeof(server)) == 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
217 if (!rc) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
218 my_disconnect(sock, false);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
219 sock = NULL_SOCKET;
129
c5cd1261394d ignore smtp connection attempts for 10 minutes when getting connection errors on verify hosts
carl
parents: 128
diff changeset
220 last_error_time = time(NULL);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
221 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
222 }
129
c5cd1261394d ignore smtp connection attempts for 10 minutes when getting connection errors on verify hosts
carl
parents: 128
diff changeset
223 else last_error_time = time(NULL);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
224 if (sock != NULL_SOCKET) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
225 pthread_mutex_lock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
226 resolver_sock_count++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
227 pthread_mutex_unlock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
228 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
229 return sock;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
230 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
231
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
232
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
233 mlfiPriv::mlfiPriv() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
234 pthread_mutex_lock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
235 pc = config;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
236 pc->reference_count++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
237 pthread_mutex_unlock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
238 get_fd();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
239 ip = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
240 mailaddr = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
241 queueid = NULL;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
242 authenticated = NULL;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
243 have_whites = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
244 only_whites = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
245 memory = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
246 scanner = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
247 content_suffix = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
248 content_message = NULL;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
249 uribl_suffix = NULL;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
250 uribl_message = NULL;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
251 content_host_ignore = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
252 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
253
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
254 mlfiPriv::~mlfiPriv() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
255 return_fd();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
256 pthread_mutex_lock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
257 pc->reference_count--;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
258 pthread_mutex_unlock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
259 reset(true);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
260 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
261
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
262 void mlfiPriv::reset(bool final) {
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
263 if (mailaddr) free(mailaddr);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
264 if (queueid) free(queueid);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
265 if (authenticated) free(authenticated);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
266 discard(env_to);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
267 if (memory) delete memory;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
268 if (scanner) delete scanner;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
269 if (!final) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
270 mailaddr = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
271 queueid = NULL;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
272 authenticated = NULL;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
273 have_whites = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
274 only_whites = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
275 memory = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
276 scanner = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
277 content_suffix = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
278 content_message = NULL;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
279 uribl_suffix = NULL;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
280 uribl_message = NULL;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
281 content_host_ignore = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
282 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
283 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
284
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
285 void mlfiPriv::get_fd() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
286 err = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
287 fd = NULL_SOCKET;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
288 int result = pthread_mutex_lock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
289 if (!result) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
290 std::set<int>::iterator i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
291 i = fd_pool.begin();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
292 if (i != fd_pool.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
293 // have at least one fd in the pool
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
294 err = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
295 fd = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
296 fd_pool.erase(fd);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
297 resolver_pool_size--;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
298 pthread_mutex_unlock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
299 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
300 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
301 // pool is empty, get a new fd
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
302 pthread_mutex_unlock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
303 fd = my_connect();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
304 err = (fd == NULL_SOCKET);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
305 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
306 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
307 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
308 // cannot lock the pool, just get a new fd
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
309 fd = my_connect();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
310 err = (fd == NULL_SOCKET);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
311 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
312 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
313
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
314 void mlfiPriv::return_fd() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
315 if (err) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
316 // this fd got a socket error, so close it, rather than returning it to the pool
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
317 my_disconnect(fd);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
318 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
319 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
320 int result = pthread_mutex_lock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
321 if (!result) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
322 if ((resolver_sock_count > resolver_pool_size*5) || (resolver_pool_size < 5)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
323 // return the fd to the pool
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
324 fd_pool.insert(fd);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
325 resolver_pool_size++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
326 pthread_mutex_unlock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
327 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
328 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
329 // more than 20% of the open resolver sockets are in the pool, and the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
330 // pool as at least 5 sockets. that is enough, so just close this one.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
331 pthread_mutex_unlock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
332 my_disconnect(fd);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
333 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
334 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
335 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
336 // could not lock the pool, so just close the fd
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
337 my_disconnect(fd);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
338 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
339 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
340 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
341
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
342 int mlfiPriv::my_write(char *buf, int len) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
343 if (err) return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
344 int rs = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
345 while (len) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
346 int ws = write(fd, buf, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
347 if (ws > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
348 rs += ws;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
349 len -= ws;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
350 buf += ws;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
351 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
352 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
353 // peer closed the socket!
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
354 rs = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
355 err = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
356 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
357 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
358 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
359 return rs;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
360 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
361
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
362 int mlfiPriv::my_read(char *buf, int len) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
363 if (err) return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
364 int rs = 0;
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
365 while (len) {
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
366 int ws = read(fd, buf, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
367 if (ws > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
368 rs += ws;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
369 len -= ws;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
370 buf += ws;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
371 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
372 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
373 // peer closed the socket!
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
374 rs = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
375 err = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
376 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
377 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
378 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
379 return rs;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
380 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
381
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
382 void mlfiPriv::need_content_filter(char *rcpt, CONTEXT &con) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
383 register_string(env_to, rcpt, &con);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
384 if (!memory) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
385 // first recipient that needs content filtering sets all
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
386 // the content filtering parameters
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
387 memory = new recorder(this, con.get_html_tags(), con.get_content_tlds(), con.get_content_cctlds());
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
388 scanner = new url_scanner(memory);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
389 content_suffix = con.get_content_suffix();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
390 content_message = con.get_content_message();
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
391 uribl_suffix = con.get_uribl_suffix();
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
392 uribl_message = con.get_uribl_message();
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
393 content_host_ignore = &con.get_content_host_ignore();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
394 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
395 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
396
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
397 #define MLFIPRIV ((struct mlfiPriv *) smfi_getpriv(ctx))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
398
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
399
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
400 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
401 // syslog a message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
402 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
403 void my_syslog(mlfiPriv *priv, char *text) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
404 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
405 if (priv) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
406 snprintf(buf, sizeof(buf), "%s: %s", priv->queueid, text);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
407 text = buf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
408 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
409 if (use_syslog) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
410 pthread_mutex_lock(&syslog_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
411 if (!syslog_opened) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
412 openlog("dnsbl", LOG_PID, LOG_MAIL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
413 syslog_opened = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
414 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
415 syslog(LOG_NOTICE, "%s", text);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
416 pthread_mutex_unlock(&syslog_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
417 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
418 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
419 printf("%s \n", text);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
420 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
421 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
422
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
423 void my_syslog(char *text) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
424 my_syslog(NULL, text);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
425 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
426
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
427
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
428 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
429 // read a resolver request from the socket, process it, and
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
430 // write the result back to the socket.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
431
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
432 void process_resolver_requests(int socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
433 void process_resolver_requests(int socket) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
434 #ifdef NS_MAXDNAME
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
435 char question[NS_MAXDNAME];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
436 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
437 char question[1000];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
438 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
439 glommer glom;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
440
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
441 int maxq = sizeof(question);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
442 while (true) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
443 // read a question
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
444 int rs = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
445 while (rs < maxq) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
446 int ns = read(socket, question+rs, maxq-rs);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
447 if (ns > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
448 rs += ns;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
449 if (question[rs-1] == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
450 // last byte read was the null terminator, we are done
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
451 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
452 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
453 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
454 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
455 // peer closed the socket
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
456 #ifdef RESOLVER_DEBUG
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
457 my_syslog("process_resolver_requests() peer closed socket while reading question");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
458 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
459 shutdown(socket, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
460 close(socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
461 return;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
462 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
463 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
464 question[rs-1] = '\0'; // ensure null termination
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
465
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
466 // find the answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
467 #ifdef NS_PACKETSZ
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
468 #ifdef RESOLVER_DEBUG
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
469 char text[1000];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
470 snprintf(text, sizeof(text), "process_resolver_requests() has a question %s", question);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
471 my_syslog(text);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
472 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
473 glom.length = res_search(question, ns_c_in, ns_t_a, glom.answer, sizeof(glom.answer));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
474 if (glom.length < 0) glom.length = 0; // represent all errors as zero length answers
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
475 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
476 glom.length = sizeof(glom.answer);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
477 glom.answer = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
478 struct hostent *host = gethostbyname(question);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
479 if (host && (host->h_addrtype == AF_INET)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
480 memcpy(&glom.answer, host->h_addr, sizeof(glom.answer));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
481 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
482 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
483
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
484 // write the answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
485 char *buf = (char *)&glom;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
486 int len = glom.length + sizeof(glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
487 #ifdef RESOLVER_DEBUG
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
488 snprintf(text, sizeof(text), "process_resolver_requests() writing answer length %d for total %d", glom.length, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
489 my_syslog(text);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
490 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
491 int ws = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
492 while (len > ws) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
493 int ns = write(socket, buf+ws, len-ws);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
494 if (ns > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
495 ws += ns;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
496 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
497 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
498 // peer closed the socket!
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
499 #ifdef RESOLVER_DEBUG
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
500 my_syslog("process_resolver_requests() peer closed socket while writing answer");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
501 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
502 shutdown(socket, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
503 close(socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
504 return;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
505 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
506 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
507 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
508 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
509
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
510
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
511 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
512 // ask a dns question and get an A record answer - we don't try
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
513 // very hard, just using the default resolver retry settings.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
514 // If we cannot get an answer, we just accept the mail.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
515 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
516 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
517 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
518 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
519 // this part can be done without locking the resolver mutex. Each
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
520 // milter thread is talking over its own socket to a separate resolver
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
521 // process, which does the actual dns resolution.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
522 if (priv.err) return 0; // cannot ask more questions on this socket.
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
523 if (maybe_ip) {
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
524 // might be a bare ip address, try this first to avoid dns lookups that may not be needed
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
525 in_addr ip;
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
526 if (inet_aton(question, &ip)) {
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
527 return (int)ip.s_addr;
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
528 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
529 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
530 int n = strlen(question);
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
531 if (question[n-1] == '.') {
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
532 priv.my_write(question, n+1); // write the question including the null terminator
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
533 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
534 else {
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
535 priv.my_write(question, n); // write the question
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
536 priv.my_write(".", 2); // and the fully qualified . terminator and null string terminator
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
537 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
538 glommer glom;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
539 char *buf = (char *)&glom;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
540 priv.my_read(buf, sizeof(glom.length));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
541 buf += sizeof(glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
542 #ifdef RESOLVER_DEBUG
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
543 char text[1000];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
544 snprintf(text, sizeof(text), "dns_interface() wrote question %s and has answer length %d", question, glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
545 my_syslog(text);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
546 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
547 if ((glom.length < 0) || (glom.length > sizeof(glom.answer))) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
548 priv.err = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
549 return 0; // cannot process overlarge answers
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
550 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
551 priv.my_read(buf, glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
552
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
553 #ifdef NS_PACKETSZ
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
554 // now we need to lock the resolver mutex to keep the milter threads from
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
555 // stepping on each other while parsing the dns answer.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
556 int ret_address = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
557 pthread_mutex_lock(&resolve_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
558 if (glom.length > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
559 // parse the answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
560 ns_msg handle;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
561 ns_rr rr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
562 if (ns_initparse(glom.answer, glom.length, &handle) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
563 // look for ns names
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
564 if (nameservers) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
565 ns_map &ns = *nameservers;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
566 int rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
567 while (ns_parserr(&handle, ns_s_ns, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
568 if (ns_rr_type(rr) == ns_t_ns) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
569 char nam[NS_MAXDNAME+1];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
570 char *n = nam;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
571 const u_char *p = ns_rr_rdata(rr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
572 while (((n-nam) < NS_MAXDNAME) && ((p-glom.answer) < glom.length) && *p) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
573 size_t s = *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
574 if (s > 191) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
575 // compression pointer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
576 s = (s-192)*256 + *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
577 if (s >= glom.length) break; // pointer outside bounds of answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
578 p = glom.answer + s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
579 s = *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
580 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
581 if (s > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
582 if ((n-nam) >= (NS_MAXDNAME-s)) break; // destination would overflow name buffer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
583 if ((p-glom.answer) >= (glom.length-s)) break; // source outside bounds of answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
584 memcpy(n, p, s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
585 n += s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
586 p += s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
587 *(n++) = '.';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
588 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
589 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
590 if (n-nam) n--; // remove trailing .
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
591 *n = '\0'; // null terminate it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
592 ns.add(nam, question); // ns host to lookup later
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
593 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
594 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
595 rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
596 while (ns_parserr(&handle, ns_s_ar, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
597 if (ns_rr_type(rr) == ns_t_a) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
598 char* nam = (char*)ns_rr_name(rr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
599 ns_mapper::iterator i = ns.ns_ip.find(nam);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
600 if (i != ns.ns_ip.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
601 // we want this ip address
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
602 int address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
603 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
604 ns.ns_ip[nam] = address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
605 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
606 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
607 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
608 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
609 int rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
610 while (ns_parserr(&handle, ns_s_an, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
611 if (ns_rr_type(rr) == ns_t_a) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
612 int address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
613 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
614 ret_address = address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
615 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
616 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
617 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
618 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
619 pthread_mutex_unlock(&resolve_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
620 return ret_address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
621 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
622 return glom.answer;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
623 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
624 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
625
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
626
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
627 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
628 // check a single dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
629 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
630 bool check_single(mlfiPriv &priv, int ip, char *suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
631 bool check_single(mlfiPriv &priv, int ip, char *suffix) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
632 // make a dns question
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
633 const u_char *src = (const u_char *)&ip;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
634 if (src[0] == 127) return false; // don't do dns lookups on localhost
126
05ae49d37896 don't do dnsbl lookups on rfc1918 address space
carl
parents: 124
diff changeset
635 if (src[0] == 10) return false; // don't do dns lookups on rfc1918 space
05ae49d37896 don't do dnsbl lookups on rfc1918 address space
carl
parents: 124
diff changeset
636 if ((src[0] == 192) && (src[1] == 168)) return false;
05ae49d37896 don't do dnsbl lookups on rfc1918 address space
carl
parents: 124
diff changeset
637 if ((src[0] == 172) && (16 <= src[1]) && (src[1] <= 31)) return false;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
638 #ifdef NS_MAXDNAME
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
639 char question[NS_MAXDNAME];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
640 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
641 char question[1000];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
642 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
643 snprintf(question, sizeof(question), "%u.%u.%u.%u.%s.", src[3], src[2], src[1], src[0], suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
644 // ask the question, if we get an A record it implies a blacklisted ip address
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
645 return dns_interface(priv, question, false, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
646 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
647
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
648
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
649 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
650 // check a single dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
651 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
652 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
653 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
654 return check_single(priv, ip, bl.suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
655 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
656
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
657
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
658 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
659 // check the dnsbls specified for this recipient
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
660 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
661 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
662 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
663 for (dnsblp_list::iterator i=dnsbll.begin(); i!=dnsbll.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
664 DNSBLP dp = *i; // non null by construction
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
665 bool st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
666 map<DNSBLP, bool>::iterator f = priv.checked.find(dp);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
667 if (f == priv.checked.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
668 // have not checked this list yet
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
669 st = check_single(priv, priv.ip, *dp);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
670 rejectlist = dp;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
671 priv.checked[dp] = st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
672 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
673 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
674 st = (*f).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
675 rejectlist = (*f).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
676 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
677 if (st) return st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
678 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
679 return false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
680 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
681
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
682
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
683 ////////////////////////////////////////////////
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
684 // lookup the domain name part of a hostname on the uribl
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
685 //
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
686 // if we find part of the hostname on the uribl, return
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
687 // true and point found to the part of the hostname that we found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
688 // otherwise, return false and preserve the value of found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
689 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
690 bool uriblookup(mlfiPriv &priv ,char *hostname, char *top, char *&found) ;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
691 bool uriblookup(mlfiPriv &priv, char *hostname, char *top, char *&found) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
692 // top is pointer to '.' char at end of base domain, or null for ip address form
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
693 // so for hostname of www.fred.mydomain.co.uk
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
694 // top points to-----------------------^
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
695 // and we end up looking at only mydomain.co.uk, ignoring the www.fred stuff
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
696 char buf[maxlen];
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
697 if (top) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
698 // add one more component
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
699 *top = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
700 char *x = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
701 if (x) hostname = x+1;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
702 *top = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
703 }
131
df355d117199 uribl lookups fully qualified; allow two component host names
carl
parents: 129
diff changeset
704 snprintf(buf, sizeof(buf), "%s.%s.", hostname, priv.uribl_suffix);
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
705 if (dns_interface(priv, buf, false, NULL)) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
706 if (debug_syslog > 2) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
707 char tmp[maxlen];
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
708 snprintf(tmp, sizeof(tmp), "found %s on %s", hostname, priv.uribl_suffix);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
709 my_syslog(tmp);
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
710 }
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
711 found = hostname;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
712 return true;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
713 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
714 return false;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
715 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
716
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
717
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
718 ////////////////////////////////////////////////
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
719 // uribl checker
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
720 // -------------
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
721 // hostname MUST not have a trailing dot
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
722 // If tld, two level lookup.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
723 // Else, look up three level domain.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
724 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
725 // if we find part of the hostname on the uribl, return
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
726 // true and point found to the part of the hostname that we found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
727 // otherwise, return false and preserve the value of found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
728 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
729 bool check_uribl(mlfiPriv &priv, char *hostname, char *&found) ;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
730 bool check_uribl(mlfiPriv &priv, char *hostname, char *&found) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
731 in_addr ip;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
732 if (inet_aton(hostname, &ip)) {
120
1d9e6c1b8872 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 119
diff changeset
733 const u_char *src = (const u_char *)&ip.s_addr;
128
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
734 if (src[0] == 127) return false; // don't do dns lookups on localhost
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
735 if (src[0] == 10) return false; // don't do dns lookups on rfc1918 space
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
736 if ((src[0] == 192) && (src[1] == 168)) return false;
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
737 if ((src[0] == 172) && (16 <= src[1]) && (src[1] <= 31)) return false;
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
738 static char adr[sizeof "255.255.255.255"];
120
1d9e6c1b8872 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 119
diff changeset
739 snprintf(adr, sizeof(adr), "%u.%u.%u.%u", src[3], src[2], src[1], src[0]);
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
740 return (uriblookup(priv, adr, NULL, found));
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
741 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
742
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
743 char *top, *top2, *top3;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
744 top = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
745 if (top) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
746 *top = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
747 top2 = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
748 *top = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
749
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
750 if (top2) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
751 string_set::iterator i = priv.memory->get_cctlds()->find(top2+1);
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
752 string_set::iterator x = priv.memory->get_cctlds()->end();
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
753 // if we have a 2-level-cctld, just look at top three levels of the name
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
754 if (i != x) return uriblookup(priv, hostname, top2, found);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
755
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
756 *top2 = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
757 top3 = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
758 *top2 = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
759
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
760 // if we have more than 3 levels in the name, look at the top three levels of the name
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
761 if (top3 && uriblookup(priv, hostname, top2, found)) return true;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
762 // if that was not found, fall thru to looking at the top two levels
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
763 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
764 // look at the top two levels of the name
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
765 return uriblookup(priv, hostname, top, found);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
766 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
767 return false;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
768 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
769
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
770
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
771 ////////////////////////////////////////////////
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
772 // check the hosts from the body against the content filter and uribl dnsbls
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
773 //
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
774 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
775 bool check_hosts(mlfiPriv &priv, bool random, int limit, char *&msg, char *&host, int &ip, char *&found);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
776 bool check_hosts(mlfiPriv &priv, bool random, int limit, char *&msg, char *&host, int &ip, char *&found) {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
777 found = NULL; // normally ip address style
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
778 if (!priv.content_suffix && !priv.uribl_suffix) return false; // nothing to check
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
779 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
780 string_set &hosts = priv.memory->get_hosts();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
781 string_set &ignore = *priv.content_host_ignore;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
782
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
783 int count = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
784 int cnt = hosts.size(); // number of hosts we could look at
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
785 int_set ips;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
786 ns_map nameservers;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
787 for (string_set::iterator i=hosts.begin(); i!=hosts.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
788 host = *i; // a reference into hosts, which will live until this smtp transaction is closed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
789
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
790 // don't bother looking up hosts on the ignore list
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
791 string_set::iterator j = ignore.find(host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
792 if (j != ignore.end()) continue;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
793
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
794 // try to only look at limit/cnt fraction of the available cnt host names in random mode
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
795 if ((cnt > limit) && (limit > 0) && random) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
796 int r = rand() % cnt;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
797 if (r >= limit) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
798 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
799 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
800 snprintf(buf, sizeof(buf), "host %s skipped", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
801 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
802 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
803 continue;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
804 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
805 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
806 count++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
807 ip = dns_interface(priv, host, true, &nameservers);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
808 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
809 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
810 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
811 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
812 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
813 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
814 snprintf(buf, sizeof(buf), "host %s found at %s", host, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
815 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
816 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
817 snprintf(buf, sizeof(buf), "host %s not found", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
818 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
819 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
820 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
821 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
822 int_set::iterator i = ips.find(ip);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
823 if (i == ips.end()) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
824 // we haven't looked this up yet
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
825 ips.insert(ip);
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
826 // check dnsbl style list
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
827 if (priv.content_suffix && check_single(priv, ip, priv.content_suffix)) {
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
828 msg = priv.content_message;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
829 return true;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
830 }
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
831 // Check uribl & surbl style list
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
832 if (priv.uribl_suffix && check_uribl(priv, host, found)) {
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
833 msg = priv.uribl_message;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
834 return true;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
835 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
836 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
837 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
838 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
839 limit *= 4; // allow average of 3 ns per host name
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
840 for (ns_mapper::iterator i=nameservers.ns_ip.begin(); i!=nameservers.ns_ip.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
841 count++;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
842 if ((count > limit) && (limit > 0)) return false; // too many name servers to check them all
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
843 host = (*i).first; // a transient reference that needs to be replaced before we return it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
844 ip = (*i).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
845 if (!ip) ip = dns_interface(priv, host, false, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
846 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
847 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
848 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
849 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
850 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
851 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
852 snprintf(buf, sizeof(buf), "ns %s found at %s", host, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
853 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
854 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
855 snprintf(buf, sizeof(buf), "ns %s not found", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
856 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
857 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
858 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
859 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
860 int_set::iterator i = ips.find(ip);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
861 if (i == ips.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
862 ips.insert(ip);
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
863 if (check_single(priv, ip, priv.content_suffix)) {
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
864 msg = priv.content_message;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
865 string_map::iterator j = nameservers.ns_host.find(host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
866 if (j != nameservers.ns_host.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
867 char *refer = (*j).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
868 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
869 snprintf(buf, sizeof(buf), "%s with nameserver %s", refer, host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
870 host = register_string(hosts, buf); // put a copy into hosts, and return that reference
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
871 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
872 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
873 host = register_string(hosts, host); // put a copy into hosts, and return that reference
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
874 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
875 return true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
876 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
877 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
878 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
879 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
880 return false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
881 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
882
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
883
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
884 ////////////////////////////////////////////////
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
885 //
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
886 // this email address is passed in from sendmail, and will normally be
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
887 // enclosed in <>. I think older versions of sendmail supplied the <>
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
888 // wrapper if the mail client did not, but the current version does not do
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
889 // that. So the <> wrapper is now optional. It may have mixed case, just
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
890 // as the mail client sent it. We dup the string and convert the duplicate
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
891 // to lower case.
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
892 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
893 char *to_lower_string(char *email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
894 char *to_lower_string(char *email) {
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
895 int n = strlen(email);
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
896 if (*email == '<') {
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
897 // assume it also ends with >
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
898 n -= 2;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
899 if (n < 1) return strdup(email); // return "<>"
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
900 email++;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
901 }
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
902 char *key = strdup(email);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
903 key[n] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
904 for (int i=0; i<n; i++) key[i] = tolower(key[i]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
905 return key;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
906 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
907
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
908
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
909 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
910 // start of sendmail milter interfaces
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
911 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
912 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
913 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
914 // allocate some private memory
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
915 mlfiPriv *priv = new mlfiPriv;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
916 if (hostaddr->sa_family == AF_INET) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
917 priv->ip = ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
918 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
919
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
920 // save the private data
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
921 smfi_setpriv(ctx, (void*)priv);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
922
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
923 // continue processing
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
924 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
925 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
926
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
927 sfsistat mlfi_envfrom(SMFICTX *ctx, char **from)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
928 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
929 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
930 priv.mailaddr = to_lower_string(from[0]);
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
931 priv.authenticated = smfi_getsymval(ctx, "{auth_authen}");
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
932 if (priv.authenticated) priv.authenticated = strdup(priv.authenticated);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
933 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
934 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
935
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
936 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **rcpt)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
937 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
938 DNSBLP rejectlist = NULL; // list that caused the reject
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
939 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
940 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
941 if (!priv.queueid) priv.queueid = strdup(smfi_getsymval(ctx, "i"));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
942 char *rcptaddr = rcpt[0];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
943 char *loto = to_lower_string(rcptaddr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
944 CONTEXT &con = *(dc.find_context(loto)->find_context(priv.mailaddr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
945 VERIFYP ver = con.find_verify(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
946 if (debug_syslog > 1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
947 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
948 char msg[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
949 snprintf(msg, sizeof(msg), "from <%s> to <%s> using context %s", priv.mailaddr, loto, con.get_full_name(buf,maxlen));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
950 my_syslog(&priv, msg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
951 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
952 free(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
953 char *fromvalue = con.find_from(priv.mailaddr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
954 status st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
955 if (priv.authenticated) {
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
956 int c = incr_rcpt_count(priv.authenticated);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
957 int l = dc.default_context->find_rate(priv.authenticated);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
958 if (c > l) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
959 smfi_setreply(ctx, "550", "5.7.1", "recipient rate limit exceeded");
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
960 return SMFIS_REJECT;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
961 }
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
962 else {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
963 if (debug_syslog > 1) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
964 char buf[maxlen];
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
965 char msg[maxlen];
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
966 snprintf(msg, sizeof(msg), "authenticated id %s (%d recipients, %d limit)", priv.authenticated, c, l);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
967 my_syslog(&priv, msg);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
968 }
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
969 st = white;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
970 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
971 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
972 else if (fromvalue == token_black) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
973 st = black;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
974 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
975 else if (fromvalue == token_white) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
976 st = white;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
977 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
978 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
979 // check the dns based lists
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
980 st = (check_dnsbl(priv, con.get_dnsbl_list(), rejectlist)) ? reject : oksofar;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
981 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
982 if (st == reject) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
983 // reject the recipient based on some dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
984 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
985 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
986 inet_ntop(AF_INET, (const u_char *)&priv.ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
987 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
988 snprintf(buf, sizeof(buf), rejectlist->message, adr, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
989 smfi_setreply(ctx, "550", "5.7.1", buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
990 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
991 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
992 if (st == black) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
993 // reject the recipient based on blacklisting either from or to
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
994 smfi_setreply(ctx, "550", "5.7.1", "no such user");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
995 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
996 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
997 if (ver && (st != white)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
998 // try to verify this from/to pair of addresses since it is not explicitly whitelisted
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
999 char *loto = to_lower_string(rcptaddr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1000 bool rc = ver->ok(priv.mailaddr, loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1001 free(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1002 if (!rc) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1003 smfi_setreply(ctx, "550", "5.7.1", "no such user");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1004 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1005 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1006 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1007 // accept the recipient
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1008 if (!con.get_content_filtering()) st = white;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1009 if (st == oksofar) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1010 // but remember the non-whites
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1011 priv.need_content_filter(rcptaddr, con);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1012 priv.only_whites = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1013 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1014 if (st == white) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1015 priv.have_whites = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1016 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1017 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1018 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1019
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1020 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1021 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1022 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1023 if (priv.authenticated) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1024 if (priv.only_whites) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1025 priv.scanner->scan(data, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1026 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1027 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1028
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1029 sfsistat mlfi_eom(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1030 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1031 sfsistat rc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1032 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1033 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1034 char *host = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1035 int ip;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1036 status st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1037 // process end of message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1038 if (priv.authenticated || priv.only_whites) rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1039 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1040 // assert env_to not empty
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1041 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1042 char *msg = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1043 string_set alive;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1044 bool random = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1045 int limit = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1046 for (context_map::iterator i=priv.env_to.begin(); i!=priv.env_to.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1047 char *rcpt = (*i).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1048 CONTEXT &con = *((*i).second);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1049 if (!con.acceptable_content(*priv.memory, msg)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1050 // bad html tags or excessive hosts
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1051 smfi_delrcpt(ctx, rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1052 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1053 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1054 alive.insert(rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1055 random |= con.get_host_random();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1056 limit = max(limit, con.get_host_limit());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1057 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1058 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1059 bool rejecting = alive.empty(); // if alive is empty, we must have set msg above in acceptable_content()
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1060 if (!rejecting) {
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1061 char *fmt, *found;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1062 if (check_hosts(priv, random, limit, fmt, host, ip, found)) {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1063 if (found) {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1064 // uribl style
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1065 snprintf(buf, sizeof(buf), fmt, host, found);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1066 }
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1067 else {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1068 // dnsbl style
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1069 char adr[sizeof "255.255.255.255"];
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1070 adr[0] = '\0';
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1071 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1072 snprintf(buf, sizeof(buf), fmt, host, adr);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1073 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1074 msg = buf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1075 rejecting = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1076 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1077 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1078 if (!rejecting) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1079 rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1080 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1081 else if (!priv.have_whites) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1082 // can reject the entire message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1083 smfi_setreply(ctx, "550", "5.7.1", msg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1084 rc = SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1085 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1086 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1087 // need to accept it but remove the recipients that don't want it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1088 for (string_set::iterator i=alive.begin(); i!=alive.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1089 char *rcpt = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1090 smfi_delrcpt(ctx, rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1091 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1092 rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1093 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1094 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1095 // reset for a new message on the same connection
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1096 mlfi_abort(ctx);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1097 return rc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1098 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1099
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1100 sfsistat mlfi_abort(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1101 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1102 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1103 priv.reset();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1104 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1105 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1106
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1107 sfsistat mlfi_close(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1108 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1109 mlfiPriv *priv = MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1110 if (!priv) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1111 delete priv;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1112 smfi_setpriv(ctx, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1113 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1114 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1115
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1116 struct smfiDesc smfilter =
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1117 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1118 "DNSBL", // filter name
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1119 SMFI_VERSION, // version code -- do not change
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1120 SMFIF_DELRCPT, // flags
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1121 mlfi_connect, // connection info filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1122 NULL, // SMTP HELO command filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1123 mlfi_envfrom, // envelope sender filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1124 mlfi_envrcpt, // envelope recipient filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1125 NULL, // header filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1126 NULL, // end of header
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1127 mlfi_body, // body block filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1128 mlfi_eom, // end of message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1129 mlfi_abort, // message aborted
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1130 mlfi_close, // connection cleanup
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1131 };
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1132
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1133
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1134 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1135 // reload the config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1136 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1137 CONFIG* new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1138 CONFIG* new_conf() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1139 CONFIG *newc = new CONFIG;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1140 pthread_mutex_lock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1141 newc->generation = generation++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1142 pthread_mutex_unlock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1143 if (debug_syslog) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1144 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1145 snprintf(buf, sizeof(buf), "loading configuration generation %d", newc->generation);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1146 my_syslog(buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1147 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1148 if (load_conf(*newc, "dnsbl.conf")) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1149 newc->load_time = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1150 return newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1151 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1152 delete newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1153 return NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1154 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1155
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1156
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1157 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1158 // thread to watch the old config files for changes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1159 // and reload when needed. we also cleanup old
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1160 // configs whose reference count has gone to zero.
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1161 // we also clear the SMTP AUTH recipient counts hourly
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1162 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1163 void* config_loader(void *arg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1164 void* config_loader(void *arg) {
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1165 int loop = 0;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1166 typedef set<CONFIG *> configp_set;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1167 configp_set old_configs;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1168 while (loader_run) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1169 sleep(180); // look for modifications every 3 minutes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1170 if (!loader_run) break;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1171 loop++;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1172 if (loop == 20) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1173 // three minutes thru each loop, 20 loops per hour
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1174 // clear the recipient counts
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1175 pthread_mutex_lock(&rate_mutex);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1176 rcpt_counts.clear();
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1177 pthread_mutex_unlock(&rate_mutex);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1178 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1179 CONFIG &dc = *config;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1180 time_t then = dc.load_time;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1181 struct stat st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1182 bool reload = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1183 for (string_set::iterator i=dc.config_files.begin(); i!=dc.config_files.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1184 char *fn = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1185 if (stat(fn, &st)) reload = true; // file disappeared
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1186 else if (st.st_mtime > then) reload = true; // file modified
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1187 if (reload) break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1188 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1189 if (reload) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1190 CONFIG *newc = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1191 if (newc) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1192 // replace the global config pointer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1193 pthread_mutex_lock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1194 CONFIG *old = config;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1195 config = newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1196 pthread_mutex_unlock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1197 if (old) old_configs.insert(old);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1198 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1199 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1200 // failed to load new config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1201 my_syslog("failed to load new configuration");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1202 system("echo 'failed to load new dnsbl configuration from /etc/dnsbl' | mail -s 'error in /etc/dnsbl configuration' root");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1203 // update the load time on the current config to prevent complaining every 3 minutes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1204 dc.load_time = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1205 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1206 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1207 // now look for old configs with zero ref counts
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1208 for (configp_set::iterator i=old_configs.begin(); i!=old_configs.end(); ) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1209 CONFIG *old = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1210 if (!old->reference_count) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1211 if (debug_syslog) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1212 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1213 snprintf(buf, sizeof(buf), "freeing memory for old configuration generation %d", old->generation);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1214 my_syslog(buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1215 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1216 delete old; // destructor does all the work
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1217 old_configs.erase(i++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1218 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1219 else i++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1220 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1221 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1222 return NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1223 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1224
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1225
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1226 void usage(char *prog);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1227 void usage(char *prog)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1228 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1229 fprintf(stderr, "Usage: %s [-d [level]] [-c] [-s] [-e from|to] -r port -p sm-sock-addr [-t timeout]\n", prog);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1230 fprintf(stderr, "where port is for the connection to our own dns resolver processes\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1231 fprintf(stderr, " and should be local-domain-socket-file-name\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1232 fprintf(stderr, "where sm-sock-addr is for the connection to sendmail\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1233 fprintf(stderr, " and should be one of\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1234 fprintf(stderr, " inet:port@ip-address\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1235 fprintf(stderr, " local:local-domain-socket-file-name\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1236 fprintf(stderr, "-c will load and dump the config to stdout\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1237 fprintf(stderr, "-s will stress test the config loading code by repeating the load/free cycle\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1238 fprintf(stderr, " in an infinte loop.\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1239 fprintf(stderr, "-d will set the syslog message level, currently 0 to 3\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1240 fprintf(stderr, "-e will print the results of looking up the from and to addresses in the\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1241 fprintf(stderr, " current config. The | character is used to separate the from and to\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1242 fprintf(stderr, " addresses in the argument to the -e switch\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1243 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1244
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1245
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1246
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1247 void setup_socket(char *sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1248 void setup_socket(char *sock) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1249 unlink(sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1250 // sockaddr_un addr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1251 // memset(&addr, '\0', sizeof addr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1252 // addr.sun_family = AF_UNIX;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1253 // strncpy(addr.sun_path, sock, sizeof(addr.sun_path)-1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1254 // int s = socket(AF_UNIX, SOCK_STREAM, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1255 // bind(s, (sockaddr*)&addr, sizeof(addr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1256 // close(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1257 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1258
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1259
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1260 /*
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1261 * The signal handler function -- only gets called when a SIGCHLD
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1262 * is received, ie when a child terminates
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1263 */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1264 void sig_chld(int signo)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1265 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1266 int status;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1267 /* Wait for any child without blocking */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1268 while (waitpid(-1, &status, WNOHANG) > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1269 // ignore child exit status, we only do this to cleanup zombies
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1270 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1271 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1272
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1273
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1274 int main(int argc, char**argv)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1275 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1276 token_init();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1277 bool check = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1278 bool stress = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1279 bool setconn = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1280 bool setreso = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1281 char *email = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1282 int c;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1283 const char *args = "r:p:t:e:d:chs";
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1284 extern char *optarg;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1285
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1286 // Process command line options
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1287 while ((c = getopt(argc, argv, args)) != -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1288 switch (c) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1289 case 'r':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1290 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1291 fprintf(stderr, "Illegal resolver socket: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1292 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1293 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1294 resolver_port = strdup(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1295 setup_socket(resolver_port);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1296 setreso = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1297 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1298
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1299 case 'p':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1300 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1301 fprintf(stderr, "Illegal sendmail socket: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1302 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1303 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1304 if (smfi_setconn(optarg) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1305 fprintf(stderr, "smfi_setconn failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1306 exit(EX_SOFTWARE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1307 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1308 if (strncasecmp(optarg, "unix:", 5) == 0) setup_socket(optarg + 5);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1309 else if (strncasecmp(optarg, "local:", 6) == 0) setup_socket(optarg + 6);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1310 setconn = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1311 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1312
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1313 case 't':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1314 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1315 fprintf(stderr, "Illegal timeout: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1316 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1317 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1318 if (smfi_settimeout(atoi(optarg)) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1319 fprintf(stderr, "smfi_settimeout failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1320 exit(EX_SOFTWARE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1321 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1322 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1323
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1324 case 'e':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1325 if (email) free(email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1326 email = strdup(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1327 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1328
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1329 case 'c':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1330 check = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1331 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1332
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1333 case 's':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1334 stress = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1335 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1336
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1337 case 'd':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1338 if (optarg == NULL || *optarg == '\0') debug_syslog = 1;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1339 else debug_syslog = atoi(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1340 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1341
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1342 case 'h':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1343 default:
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1344 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1345 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1346 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1347 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1348
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1349 if (check) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1350 use_syslog = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1351 debug_syslog = 10;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1352 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1353 if (conf) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1354 conf->dump();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1355 delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1356 return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1357 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1358 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1359 return 1; // config failed to load
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1360 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1361 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1362
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1363 if (stress) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1364 fprintf(stdout, "stress testing\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1365 while (1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1366 for (int i=0; i<10; i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1367 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1368 if (conf) delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1369 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1370 fprintf(stdout, ".");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1371 fflush(stdout);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1372 sleep(1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1373 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1374 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1375
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1376 if (email) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1377 char *x = strchr(email, '|');
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1378 if (x) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1379 *x = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1380 char *from = strdup(email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1381 char *to = strdup(x+1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1382 use_syslog = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1383 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1384 if (conf) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1385 CONTEXTP con = conf->find_context(to);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1386 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1387 fprintf(stdout, "envelope to <%s> finds context %s\n", to, con->get_full_name(buf,maxlen));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1388 CONTEXTP fc = con->find_context(from);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1389 fprintf(stdout, "envelope from <%s> finds context %s\n", from, fc->get_full_name(buf,maxlen));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1390 char *st = fc->find_from(from);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1391 fprintf(stdout, "envelope from <%s> finds status %s\n", from, st);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1392 delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1393 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1394 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1395 return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1396 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1397
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1398 if (!setconn) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1399 fprintf(stderr, "%s: Missing required -p argument\n", argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1400 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1401 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1402 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1403
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1404 if (!setreso) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1405 fprintf(stderr, "%s: Missing required -r argument\n", argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1406 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1407 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1408 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1409
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1410 if (smfi_register(smfilter) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1411 fprintf(stderr, "smfi_register failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1412 exit(EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1413 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1414
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1415 // switch to background mode
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1416 if (daemon(1,0) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1417 fprintf(stderr, "daemon() call failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1418 exit(EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1419 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1420
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1421 // write the pid
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1422 const char *pidpath = "/var/run/dnsbl.pid";
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1423 unlink(pidpath);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1424 FILE *f = fopen(pidpath, "w");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1425 if (f) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1426 #ifdef linux
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1427 // from a comment in the DCC source code:
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1428 // Linux threads are broken. Signals given the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1429 // original process are delivered to only the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1430 // thread that happens to have that PID. The
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1431 // sendmail libmilter thread that needs to hear
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1432 // SIGINT and other signals does not, and that breaks
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1433 // scripts that need to stop milters.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1434 // However, signaling the process group works.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1435 fprintf(f, "-%d\n", (u_int)getpgrp());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1436 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1437 fprintf(f, "%d\n", (u_int)getpid());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1438 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1439 fclose(f);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1440 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1441
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1442 // initialize the thread sync objects
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1443 pthread_mutex_init(&config_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1444 pthread_mutex_init(&syslog_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1445 pthread_mutex_init(&resolve_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1446 pthread_mutex_init(&fd_pool_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1447
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1448 // drop root privs
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1449 struct passwd *pw = getpwnam("dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1450 if (pw) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1451 if (setgid(pw->pw_gid) == -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1452 my_syslog("failed to switch to group dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1453 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1454 if (setuid(pw->pw_uid) == -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1455 my_syslog("failed to switch to user dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1456 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1457 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1458
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1459 // load the initial config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1460 config = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1461 if (!config) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1462 my_syslog("failed to load initial configuration, quitting");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1463 exit(1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1464 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1465
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1466 // fork off the resolver listener process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1467 pid_t child = fork();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1468 if (child < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1469 my_syslog("failed to create resolver listener process");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1470 exit(0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1471 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1472 if (child == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1473 // we are the child - dns resolver listener process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1474 resolver_socket = socket(AF_UNIX, SOCK_STREAM, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1475 if (resolver_socket < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1476 my_syslog("child failed to create resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1477 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1478 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1479 sockaddr_un server;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1480 memset(&server, '\0', sizeof(server));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1481 server.sun_family = AF_UNIX;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1482 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1483 //try to bind the address to the socket.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1484 if (bind(resolver_socket, (sockaddr *)&server, sizeof(server)) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1485 // bind failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1486 shutdown(resolver_socket, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1487 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1488 my_syslog("child failed to bind resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1489 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1490 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1491 //listen on the socket.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1492 if (listen(resolver_socket, 10) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1493 // listen failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1494 shutdown(resolver_socket, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1495 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1496 my_syslog("child failed to listen to resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1497 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1498 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1499 // setup sigchld handler to prevent zombies
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1500 struct sigaction act;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1501 act.sa_handler = sig_chld; // Assign sig_chld as our SIGCHLD handler
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1502 sigemptyset(&act.sa_mask); // We don't want to block any other signals in this example
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1503 act.sa_flags = SA_NOCLDSTOP; // only want children that have terminated
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1504 if (sigaction(SIGCHLD, &act, NULL) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1505 my_syslog("child failed to setup SIGCHLD handler");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1506 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1507 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1508 while (true) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1509 sockaddr_un client;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1510 socklen_t clientlen = sizeof(client);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1511 int s = accept(resolver_socket, (sockaddr *)&client, &clientlen);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1512 if (s > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1513 // accept worked, it did not get cancelled before we could accept it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1514 // fork off a process to handle this connection
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1515 int newchild = fork();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1516 if (newchild == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1517 // this is the worker process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1518 // child does not need the listening socket
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1519 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1520 process_resolver_requests(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1521 exit(0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1522 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1523 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1524 // this is the parent
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1525 // parent does not need the accepted socket
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1526 close(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1527 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1528 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1529 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1530 exit(0); // make sure we don't fall thru.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1531 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1532 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1533 sleep(2); // allow child to get started
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1534 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1535
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1536 // only create threads after the fork() in daemon
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1537 pthread_t tid;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1538 if (pthread_create(&tid, 0, config_loader, 0))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1539 my_syslog("failed to create config loader thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1540 if (pthread_detach(tid))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1541 my_syslog("failed to detach config loader thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1542 if (pthread_create(&tid, 0, verify_closer, 0))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1543 my_syslog("failed to create verify closer thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1544 if (pthread_detach(tid))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1545 my_syslog("failed to detach verify closer thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1546
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1547 time_t starting = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1548 int rc = smfi_main();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1549 if ((rc != MI_SUCCESS) && (time(NULL) > starting+5*60)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1550 my_syslog("trying to restart after smfi_main()");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1551 loader_run = false; // eventually the config loader thread will terminate
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1552 execvp(argv[0], argv);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1553 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1554 exit((rc == MI_SUCCESS) ? 0 : EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1555 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1556