Mercurial > dnsbl
comparison src/dnsbl.cpp @ 409:e018ed19a1cc
require 3 dots in bare ip addresses
| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Sun, 16 Apr 2017 09:06:52 -0700 |
| parents | 9096d2676c13 |
| children | 6b03435868cb |
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| 408:067963dc142f | 409:e018ed19a1cc |
|---|---|
| 314 // this part can be done without locking the resolver mutex. Each | 314 // this part can be done without locking the resolver mutex. Each |
| 315 // milter thread is talking over its own socket to a separate resolver | 315 // milter thread is talking over its own socket to a separate resolver |
| 316 // process, which does the actual dns resolution. | 316 // process, which does the actual dns resolution. |
| 317 if (priv.err) return 0; // cannot ask more questions on this socket. | 317 if (priv.err) return 0; // cannot ask more questions on this socket. |
| 318 if (maybe_ip && (qtype == ns_t_a)) { | 318 if (maybe_ip && (qtype == ns_t_a)) { |
| 319 // might be a bare ip address, try this first to avoid dns lookups that may not be needed | 319 int c = 0; |
| 320 const char q = question; | |
| 321 while (*q) { | |
| 322 if (*q == '.') c++; | |
| 323 q++; | |
| 324 } | |
| 325 // might be a bare IPv4 address, try this first to avoid dns lookups that may not be needed | |
| 320 in_addr ip; | 326 in_addr ip; |
| 321 if (inet_aton(question, &ip)) { | 327 if ((c == 3) && inet_aton(question, &ip)) { |
| 322 return ip.s_addr; | 328 return ip.s_addr; |
| 323 } | 329 } |
| 324 } | 330 } |
| 325 int8_t qt = qtype; | 331 int8_t qt = qtype; |
| 326 priv.my_write((const char *)&qt, 1);// write the query type | 332 priv.my_write((const char *)&qt, 1);// write the query type |