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authorJannis Hoffmann <jannis@fehcom.de>2024-07-09 13:58:20 +0200
committerJannis Hoffmann <jannis@fehcom.de>2024-07-09 13:58:20 +0200
commit249866e3d1e11dc72eaa1305f4bb479ded92ef38 (patch)
tree7118c5f58e29fe61c100e4d067bb90ba8d52589e /dnsstub/dns_mx.c
parent96cf8dffe4f7b0b910f790066ae622dc429eb522 (diff)
reorganized file structure
Moved c files into src/. Corrected VERSION file. Removed BUILD and FILES.
Diffstat (limited to 'dnsstub/dns_mx.c')
-rw-r--r--dnsstub/dns_mx.c63
1 files changed, 0 insertions, 63 deletions
diff --git a/dnsstub/dns_mx.c b/dnsstub/dns_mx.c
deleted file mode 100644
index c0845ef..0000000
--- a/dnsstub/dns_mx.c
+++ /dev/null
@@ -1,63 +0,0 @@
-#include "stralloc.h"
-#include "byte.h"
-#include "uint_t.h"
-#include "dnsresolv.h"
-
-/**
- @file dns_mx.c
- @author djb
- @source qmail
- @brief dns MX query
- @param (on output) stralloc out
-*/
-
-static char *q = 0;
-
-int dns_mx_packet(stralloc *out,const char *buf,unsigned int len)
-{
- unsigned int pos;
- char header[12];
- char pref[2];
- 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_MX))
- if (byte_equal(header + 2,2,DNS_C_IN)) {
- if (!dns_packet_copy(buf,len,pos,pref,2)) return DNS_ERR;
- if (!dns_packet_getname(buf,len,pos + 2,&q)) return DNS_ERR;
- if (!stralloc_catb(out,pref,2)) return DNS_MEM;
- if (dns_domain_todot_cat(out,q) <= 0) return DNS_ERR;
- if (!stralloc_0(out)) return DNS_MEM;
- }
- pos += datalen;
- ++ranswers;
- }
-
- return ranswers;
-}
-
-int dns_mx(stralloc *out,const stralloc *fqdn)
-{
- int rc = 0;
-
- if (dns_domain_fromdot(&q,fqdn->s,fqdn->len) <= 0) return DNS_ERR;
- if (dns_resolve(q,DNS_T_MX) >= 0) {
- if ((rc = dns_mx_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;
-}