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Functions | |
| int | ast_search_dns (void *context, const char *dname, int class, int type, int(*callback)(void *context, char *answer, int len, char *fullanswer)) |
| Perform DNS lookup (used by enum and SRV lookups). | |
Definition in file dns.h.
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Perform DNS lookup (used by enum and SRV lookups).
Definition at line 186 of file dns.c. References ast_log(), ast_mutex_lock(), ast_mutex_unlock(), dns_parse_answer(), LOG_DEBUG, LOG_WARNING, and MAX_SIZE. Referenced by ast_get_enum(), ast_get_srv(), and ast_get_txt(). 00189 {
00190 #ifdef HAS_RES_NINIT
00191 struct __res_state dnsstate;
00192 #endif
00193 char answer[MAX_SIZE];
00194 int res, ret = -1;
00195
00196 #ifdef HAS_RES_NINIT
00197 #ifdef MAKE_VALGRIND_HAPPY
00198 memset(&dnsstate, 0, sizeof(dnsstate));
00199 #endif
00200 res_ninit(&dnsstate);
00201 res = res_nsearch(&dnsstate, dname, class, type, (unsigned char *)answer, sizeof(answer));
00202 #else
00203 ast_mutex_lock(&res_lock);
00204 res_init();
00205 res = res_search(dname, class, type, answer, sizeof(answer));
00206 #endif
00207 if (res > 0) {
00208 if ((res = dns_parse_answer(context, class, type, answer, res, callback)) < 0) {
00209 ast_log(LOG_WARNING, "DNS Parse error for %s\n", dname);
00210 ret = -1;
00211 }
00212 else if (ret == 0) {
00213 ast_log(LOG_DEBUG, "No matches found in DNS for %s\n", dname);
00214 ret = 0;
00215 }
00216 else
00217 ret = 1;
00218 }
00219 #ifdef HAS_RES_NINIT
00220 res_nclose(&dnsstate);
00221 #else
00222 #ifndef __APPLE__
00223 res_close();
00224 #endif
00225 ast_mutex_unlock(&res_lock);
00226 #endif
00227 return ret;
00228 }
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1.4.2