diff options
Diffstat (limited to 'dnsstub/dns_txt.c')
-rw-r--r-- | dnsstub/dns_txt.c | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/dnsstub/dns_txt.c b/dnsstub/dns_txt.c deleted file mode 100644 index 9a1b56a..0000000 --- a/dnsstub/dns_txt.c +++ /dev/null @@ -1,64 +0,0 @@ -#include "stralloc.h" -#include "uint_t.h" -#include "byte.h" -#include "dnsresolv.h" - -int dns_txt_packet(stralloc *out,const char *buf,unsigned int len) -{ - unsigned int pos; - char header[12]; - uint16 numanswers; - uint16 datalen; - char ch; - unsigned int txtlen; - int i; - int ranswers = 0; - - if (!stralloc_copys(out,"")) return DNS_MEM; - - pos = dns_packet_copy(buf,len,0,header,12); if (!pos) return DNS_ERR; - uint16_unpack_big(header + 6,&numanswers); - pos = dns_packet_skipname(buf,len,pos); if (!pos) return DNS_ERR; - pos += 4; - - while (numanswers--) { - pos = dns_packet_skipname(buf,len,pos); if (!pos) return DNS_ERR; - pos = dns_packet_copy(buf,len,pos,header,10); if (!pos) return DNS_ERR; - uint16_unpack_big(header + 8,&datalen); - if (byte_equal(header,2,DNS_T_TXT)) - if (byte_equal(header + 2,2,DNS_C_IN)) { - if (pos + datalen > len) return DNS_ERR; - txtlen = (unsigned char) buf[pos]; - for (i = 1; i < datalen; ++i) { - ch = buf[pos + i]; - if (i == txtlen + 1) // next label - txtlen += (unsigned char) ch + 1; - else { - if (ch < 32) ch = '?'; - if (ch > 126) ch = '?'; - if (!stralloc_append(out,&ch)) return DNS_MEM; - } - } - } - pos += datalen; - ++ranswers; - if (numanswers) if (!stralloc_append(out,"\n")) return DNS_MEM; - } - - return ranswers; -} - -static char *q = 0; - -int dns_txt(stralloc *out,const stralloc *fqdn) -{ - int rc; - - if (dns_domain_fromdot(&q,fqdn->s,fqdn->len) <= 0) return DNS_ERR; - if (dns_resolve(q,DNS_T_TXT) < 0) return DNS_ERR; - if ((rc = dns_txt_packet(out,dns_resolve_tx.packet,dns_resolve_tx.packetlen)) < 0) return DNS_ERR; - dns_transmit_free(&dns_resolve_tx); - dns_domain_free(&q); - - return rc; -} |