| 141 | } |
| 142 | |
| 143 | int get_dns_answer(union dns_query *answer,int anslen,char *qname,int qtype,int *min_ttl) |
| 144 | { |
| 145 | register const HEADER *hp; |
| 146 | register int n; |
| 147 | register const unsigned char *cp; |
| 148 | const char* tname; |
| 149 | const unsigned char *eom,*erdata; |
| 150 | int type, class,ttl, buflen, ancount; |
| 151 | int haveanswer, had_error; |
| 152 | char *bp,**ap,**hap; |
| 153 | char tbuf[DNS_MAX_NAME]; |
| 154 | int toobig=0; |
| 155 | |
| 156 | tname = qname; |
| 157 | global_he.h_name = NULL; |
| 158 | eom = answer->buff + anslen; |
| 159 | |
| 160 | hp = &answer->hdr; |
| 161 | ancount = ntohs(hp->ancount); |
| 162 | bp = hostbuf; |
| 163 | buflen = sizeof hostbuf; |
| 164 | |
| 165 | cp = answer->buff; |
| 166 | BOUNDED_INCR(DNS_HDR_SIZE); |
| 167 | |
| 168 | n = dn_expand(answer->buff, eom, cp, bp, buflen); |
| 169 | if (n < 0) { |
| 170 | LM_ERR("Error expanding name\n"); |
| 171 | return -1; |
| 172 | } |
| 173 | BOUNDED_INCR(n+4); |
| 174 | |
| 175 | if (qtype == T_A || qtype == T_AAAA) { |
| 176 | n = strlen(bp) + 1; |
| 177 | if (n >= DNS_MAX_NAME) { |
| 178 | LM_ERR("Name too large\n"); |
| 179 | return -1; |
| 180 | } |
| 181 | global_he.h_name = bp; |
| 182 | bp += n; |
| 183 | buflen -= n; |
| 184 | /* The qname can be abbreviated, but h_name is now absolute. */ |
| 185 | qname = global_he.h_name; |
| 186 | } |
| 187 | |
| 188 | ap = host_aliases; |
| 189 | *ap = NULL; |
| 190 | global_he.h_aliases = host_aliases; |
| 191 | hap = h_addr_ptrs; |
| 192 | *hap = NULL; |
| 193 | global_he.h_addr_list = h_addr_ptrs; |
| 194 | haveanswer = 0; |
| 195 | had_error = 0; |
| 196 | while (ancount-- > 0 && cp < eom && !had_error) { |
| 197 | n = dn_expand(answer->buff, eom, cp, bp, buflen); |
| 198 | if (n < 0) { |
| 199 | had_error++; |
| 200 | continue; |
no test coverage detected