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-rw-r--r--dnsstub/dns_ipq.c236
1 files changed, 0 insertions, 236 deletions
diff --git a/dnsstub/dns_ipq.c b/dnsstub/dns_ipq.c
deleted file mode 100644
index 26c3818..0000000
--- a/dnsstub/dns_ipq.c
+++ /dev/null
@@ -1,236 +0,0 @@
-#include "case.h"
-#include "byte.h"
-#include "str.h"
-#include "stralloc.h"
-#include "dnsresolv.h"
-#include "socket_if.h"
-#include "ip.h"
-
-/**
- @file dns_ipq.c
- @author djb, feh
- @source ucspi-tcp
- @brief DNS hostname qualification for ipv4 and ipv6
-*/
-
-/**
- @fn int doit -> @return number of added chars to name
-*/
-static int doit(stralloc *work,const char *rule)
-{
- char ch;
- unsigned int colon;
- unsigned int prefixlen;
-
- ch = *rule++;
- if ((ch != '?') && (ch != '=') && (ch != '*') && (ch != '-')) return 1;
- colon = str_chr((char *)rule,':');
- if (!rule[colon]) return 1;
-
- if (work->len < colon) return 1;
- prefixlen = work->len - colon;
- if ((ch == '=') && prefixlen) return 1;
- if (case_diffb((char *)rule,colon,work->s + prefixlen)) return 1;
- if (ch == '?') {
- if (byte_chr(work->s,prefixlen,'.') < prefixlen) return 1;
- if (byte_chr(work->s,prefixlen,'[') < prefixlen) return 1;
- if (byte_chr(work->s,prefixlen,']') < prefixlen) return 1;
- }
-
- work->len = prefixlen;
- if (ch == '-') work->len = 0;
- return stralloc_cats(work,rule + colon + 1);
-}
-
-/** @fn int dns_ip4_qualify_rules -> @return number of IPv4 addresss with rules */
-
-int dns_ip4_qualify_rules(stralloc *ipout,stralloc *fqdn,const stralloc *in,const stralloc *rules)
-{
- unsigned int i;
- unsigned int j;
- unsigned int plus;
- unsigned int fqdnlen;
- int rc = 0;
-
- if (!stralloc_copy(fqdn,(stralloc *)in)) return DNS_MEM;
-
- for (j = i = 0; j < rules->len; ++j)
- if (!rules->s[j]) {
- if (!doit(fqdn,rules->s + i)) return DNS_INT;
- i = j + 1;
- }
-
- fqdnlen = fqdn->len;
- plus = byte_chr(fqdn->s,fqdnlen,'+');
- if (plus >= fqdnlen)
- return dns_ip4(ipout,fqdn);
-
- i = plus + 1;
- for (;;) {
- j = byte_chr(fqdn->s + i,fqdnlen - i,'+');
- byte_copy(fqdn->s + plus,j,fqdn->s + i);
- fqdn->len = plus + j;
- if (rc += dns_ip4(ipout,fqdn) < 0) return DNS_ERR;
- i += j;
- if (i >= fqdnlen) return rc;
- ++i;
- }
- return 0;
-}
-
-/** @fn int dns_ip4_qualify -> @return number of IPv4 addresss qualified */
-
-int dns_ip4_qualify(stralloc *ipout,stralloc *fqdn,const stralloc *in)
-{
- int r;
- static stralloc rules;
-
- if ((r = dns_ip_qualify_localhost(ipout,fqdn,in)) > 0 ) return r;
- if (dns_resolvconfrewrite(&rules) < 0) return DNS_INT;
- return dns_ip4_qualify_rules(ipout,fqdn,in,&rules);
-}
-
-/** @fn int dns_ip4_qualify_rules -> @return number of IPv6 addresss with rules */
-
-int dns_ip6_qualify_rules(stralloc *ipout,stralloc *fqdn,const stralloc *in,const stralloc *rules)
-{
- unsigned int i;
- unsigned int j;
- unsigned int plus;
- unsigned int fqdnlen;
- int rc = 0;
-
- if (!stralloc_copy(fqdn,(stralloc *)in)) return DNS_MEM;
-
- for (j = i = 0; j < rules->len; ++j)
- if (!rules->s[j]) {
- if (!doit(fqdn,rules->s + i)) return DNS_INT;
- i = j + 1;
- }
-
- fqdnlen = fqdn->len;
- plus = byte_chr(fqdn->s,fqdnlen,'+');
- if (plus >= fqdnlen)
- return dns_ip6(ipout,fqdn);
-
- i = plus + 1;
- for (;;) {
- j = byte_chr(fqdn->s + i,fqdnlen - i,'+');
- byte_copy(fqdn->s + plus,j,fqdn->s + i);
- fqdn->len = plus + j;
- if ((rc += dns_ip6(ipout,fqdn)) < 0) return DNS_ERR;
- i += j;
- if (i >= fqdnlen) return rc;
- ++i;
- }
- return 0;
-}
-
-/** @fn int dns_ip6_qualify -> @return number of IPv6 addresss qualified */
-
-int dns_ip6_qualify(stralloc *ipout,stralloc *fqdn,const stralloc *in)
-{
- int r;
- static stralloc rules;
-
- if ((r = dns_ip_qualify_localhost(ipout,fqdn,in)) > 0) return r;
- if (dns_resolvconfrewrite(&rules) < 0) return DNS_INT;
- return dns_ip6_qualify_rules(ipout,fqdn,in,&rules);
-}
-
-/** @fn int dns_ip_qualify_rules -> @return number of IPv6+IPv4 addresss with rules */
-
-int dns_ip_qualify_rules(stralloc *ipout,stralloc *fqdn,const stralloc *in,const stralloc *rules)
-{
- unsigned int i;
- unsigned int j;
- unsigned int k;
- unsigned int plus;
- unsigned int fqdnlen;
- stralloc tmp = {0};
- int rc = 0;
-
- if (!stralloc_copy(fqdn,(stralloc *)in)) return DNS_MEM;
- if (!stralloc_copys(ipout,"")) return DNS_MEM;
-
- for (j = i = 0; j < rules->len; ++j)
- if (!rules->s[j]) {
- if (!doit(fqdn,rules->s + i)) return DNS_INT;
- i = j + 1;
- }
-
- fqdnlen = fqdn->len;
- plus = byte_chr(fqdn->s,fqdnlen,'+');
- if (plus >= fqdnlen) {
- rc = dns_ip6(ipout,fqdn);
- if (dns_ip4(&tmp,fqdn) > 0) {
- for (k = 0; k < tmp.len; k += 4) {
- if (!stralloc_catb(ipout,(const char *) V4mappedprefix,12)) return DNS_MEM;
- if (!stralloc_catb(ipout,tmp.s + k,4)) return DNS_MEM;
- rc++;
- }
- }
- return rc;
- }
-
- i = plus + 1;
- for (;;) {
- j = byte_chr(fqdn->s + i,fqdnlen - i,'+');
- byte_copy(fqdn->s + plus,j,fqdn->s + i);
- fqdn->len = plus + j;
- if (!stralloc_copys(ipout,"")) return DNS_MEM;
- rc = dns_ip6(&tmp,fqdn);
- if (rc) if (!stralloc_cat(ipout,&tmp)) return DNS_MEM;
- if (dns_ip4(&tmp,fqdn) > 0) {
- for (k = 0; k < tmp.len; k += 4) {
- if (!stralloc_catb(ipout,(const char *) V4mappedprefix,12)) return DNS_MEM;
- if (!stralloc_catb(ipout,tmp.s + k,4)) return DNS_MEM;
- rc++;
- }
- }
-
- if (rc < 0) return DNS_ERR;
- i += j;
- if (i >= fqdnlen) return rc;
- ++i;
- }
- return 0;
-}
-
-/** @fn int dns_ip_qualify_localhost -> @return number of IP addresss */
-
-int dns_ip_qualify_localhost(stralloc *ipout,stralloc *fqdn,const stralloc *in)
-{
- if (!stralloc_copys(ipout,"")) return DNS_MEM;
- if (!stralloc_copys(fqdn,"")) return DNS_MEM;
- ipout->len = 0;
-
- if (byte_equal(in->s,9,LOCALHOST)) {
- if (!stralloc_copyb(ipout,(const char *) V6loopback,16)) return DNS_MEM;
- if (!stralloc_catb(ipout,(const char *) V46loopback,16)) return DNS_MEM;
- if (!stralloc_copys(fqdn,"localhost.localhost.")) return DNS_MEM;
- }
- if (byte_equal(in->s,13,IP4_LOOPBACK)) {
- if (!stralloc_copyb(ipout,(const char *) V46loopback,16)) return DNS_MEM;
- if (!stralloc_copys(fqdn,"ip4-loopback.localhost.")) return DNS_MEM;
- }
- if (byte_equal(in->s,13,IP6_LOOPBACK)) {
- if (!stralloc_copyb(ipout,(const char *) V6loopback,16)) return DNS_MEM;
- if (!stralloc_copys(fqdn,"ip6-loopback.localhost.")) return DNS_MEM;
- }
-// if (!stralloc_0(fqdn)) return DNS_MEM; // don't do it
-
- return ipout->len ? ipout->len % 15 : 0;
-}
-
-/** @fn int dns_ip_qualify -> @return number of IP addresss */
-
-int dns_ip_qualify(stralloc *ipout,stralloc *fqdn,const stralloc *in)
-{
- int r;
- static stralloc rules;
-
- if ((r = dns_ip_qualify_localhost(ipout,fqdn,in)) > 0 ) return r;
- if (dns_resolvconfrewrite(&rules) < 0) return DNS_INT;
- return dns_ip_qualify_rules(ipout,fqdn,in,&rules);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 11:50:52 +0000