diff options
author | Jannis Hoffmann <jannis@fehcom.de> | 2024-07-09 13:58:20 +0200 |
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committer | Jannis Hoffmann <jannis@fehcom.de> | 2024-07-09 13:58:20 +0200 |
commit | 249866e3d1e11dc72eaa1305f4bb479ded92ef38 (patch) | |
tree | 7118c5f58e29fe61c100e4d067bb90ba8d52589e /dnsstub/dns_cname.c | |
parent | 96cf8dffe4f7b0b910f790066ae622dc429eb522 (diff) |
reorganized file structure
Moved c files into src/.
Corrected VERSION file.
Removed BUILD and FILES.
Diffstat (limited to 'dnsstub/dns_cname.c')
-rw-r--r-- | dnsstub/dns_cname.c | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/dnsstub/dns_cname.c b/dnsstub/dns_cname.c deleted file mode 100644 index 408949a..0000000 --- a/dnsstub/dns_cname.c +++ /dev/null @@ -1,59 +0,0 @@ -#include "stralloc.h" -#include "uint_t.h" -#include "byte.h" -#include "ip.h" -#include "case.h" -#include "dnsresolv.h" - -/** - @file dns_cname.c - @author feh - @brief DNS cname lookup -*/ - -static char *q = 0; - -int dns_cname_packet(stralloc *out,const char *buf,unsigned int len) -{ - unsigned int pos; - char header[12]; - uint16 numanswers; - uint16 datalen; - 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_CNAME)) - if (byte_equal(header + 2,2,DNS_C_IN)) { - if (!dns_packet_getname(buf,len,pos,&q)) return DNS_ERR; - if (dns_domain_todot_cat(out,q) <= 0) return DNS_ERR; - } - pos += datalen; - ++ranswers; - } - - return ranswers; -} - -int dns_cname(stralloc *out,stralloc *fqdn) -{ - int rc; - - if (dns_domain_fromdot(&q,fqdn->s,fqdn->len) <= 0) return DNS_ERR; - if (dns_resolve(q,DNS_T_CNAME) < 0) return DNS_ERR; - if ((rc = dns_cname_packet(out,dns_resolve_tx.packet,dns_resolve_tx.packetlen)) < 0) return DNS_ERR; - dns_transmit_free(&dns_resolve_tx); - dns_domain_free(&q); - if (case_equals(out->s,fqdn->s)) rc = -6; // loop DNS_HARD - - return rc; -} |