summaryrefslogtreecommitdiff
path: root/src/dns.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/dns.c')
-rw-r--r--src/dns.c138
1 files changed, 78 insertions, 60 deletions
diff --git a/src/dns.c b/src/dns.c
index 3f1154b..c49b633 100644
--- a/src/dns.c
+++ b/src/dns.c
@@ -1,20 +1,25 @@
+#include "dns.h"
+
+#include <arpa/nameser.h>
+
#include <netdb.h>
-#include <string.h>
-#include <sys/types.h>
#include <netinet/in.h>
-#include <arpa/nameser.h>
#include <sys/socket.h>
-#include "ip.h"
-#include "ipalloc.h"
-#include "fmt.h"
+#include <sys/types.h>
+
+#include <string.h>
+
#include "alloc.h"
-#include "str.h"
-#include "stralloc.h"
-#include "dnsresolv.h"
-#include "case.h"
-#include "dns.h"
#include "buffer.h"
+#include "case.h"
+#include "dnsresolv.h"
#include "exit.h"
+#include "fmt.h"
+#include "ip.h"
+#include "str.h"
+#include "stralloc.h"
+
+#include "ipalloc.h"
/**
@file dns.c
@@ -24,86 +29,96 @@
static stralloc glue = {0};
static stralloc ip = {0};
-static int dns_ipplus(ipalloc *ia,stralloc *sa,int pref)
+static int dns_ipplus(ipalloc *ia, stralloc *sa, int pref)
{
struct ip_mx ix;
int error = 0;
char ip4[4];
char ip6[16];
- int i;
+ int i;
/* Case 1: sa is just IPv4 */
- if (ip4_scanbracket(sa->s,ip4)) {
- if (!stralloc_copys(&glue,sa->s)) return DNS_MEM;
+ if (ip4_scanbracket(sa->s, ip4)) {
+ if (!stralloc_copys(&glue, sa->s)) return DNS_MEM;
if (!stralloc_0(&glue)) return DNS_MEM;
if (glue.s[0]) {
ix.pref = 0;
ix.af = AF_INET;
- byte_copy(&ix.addr,4,ip4); // = ip; //cp
- if (!ipalloc_append(ia,&ix)) return DNS_MEM;
+ byte_copy(&ix.addr, 4, ip4); // = ip; //cp
+ if (!ipalloc_append(ia, &ix)) return DNS_MEM;
return 0;
}
}
/* Case 2: sa is just IPv6 */
- if (ip6_scanbracket(sa->s,ip6)) {
- if (!stralloc_copys(&glue,sa->s)) return DNS_MEM;
+ if (ip6_scanbracket(sa->s, ip6)) {
+ if (!stralloc_copys(&glue, sa->s)) return DNS_MEM;
if (!stralloc_0(&glue)) return DNS_MEM;
if (glue.s[0]) {
ix.pref = 0;
ix.af = AF_INET6;
- byte_copy(&ix.addr,16,ip6); // = ip; //cp
- if (!ipalloc_append(ia,&ix)) return DNS_MEM;
+ byte_copy(&ix.addr, 16, ip6); // = ip; //cp
+ if (!ipalloc_append(ia, &ix)) return DNS_MEM;
return 0;
}
}
/* Case 3: sa is fqdn and looking for IPv6 */
- if (dns_ip6(&ip,sa) > 0) {
+ if (dns_ip6(&ip, sa) > 0) {
for (i = 0; i + 16 <= ip.len; i += 16) {
if (ip6_isv4mapped(ip.s + i)) continue;
- ix.af = AF_INET6;
- ix.pref = pref;
- byte_copy(&ix.addr,16,ip.s + i); // = ip; //cp
- str_copy(ix.mxh,sa->s); // mx hostname
- if (!ipalloc_append(ia,&ix)) { error = DNS_MEM; break; }
- error = 0;
+ ix.af = AF_INET6;
+ ix.pref = pref;
+ byte_copy(&ix.addr, 16, ip.s + i); // = ip; //cp
+ str_copy(ix.mxh, sa->s); // mx hostname
+ if (!ipalloc_append(ia, &ix)) {
+ error = DNS_MEM;
+ break;
}
+ error = 0;
+ }
} else
error = 1;
/* Case 4: sa is fqdn and looking for IPv4 */
- if (dns_ip4(&ip,sa) > 0) {
+ if (dns_ip4(&ip, sa) > 0) {
for (i = 0; i + 4 <= ip.len; i += 4) {
ix.af = AF_INET;
ix.pref = pref;
- byte_copy(&ix.addr,4,ip.s + i); // = ip; //cp
- str_copy(ix.mxh,sa->s); // mx hostname
- if (!ipalloc_append(ia,&ix)) { error = DNS_MEM; break; }
+ byte_copy(&ix.addr, 4, ip.s + i); // = ip; //cp
+ str_copy(ix.mxh, sa->s); // mx hostname
+ if (!ipalloc_append(ia, &ix)) {
+ error = DNS_MEM;
+ break;
+ }
error = 0;
}
} else
- error += 2;
+ error += 2;
return error;
}
-int dns_ipalloc(ipalloc *ia,stralloc *sa)
+int dns_ipalloc(ipalloc *ia, stralloc *sa)
{
- if (!ipalloc_readyplus(ia,0)) return DNS_MEM;
+ if (!ipalloc_readyplus(ia, 0)) return DNS_MEM;
ia->len = 0;
- return dns_ipplus(ia,sa,0);
+ return dns_ipplus(ia, sa, 0);
}
/* dns_mxip */
-int dns_mxip(ipalloc *ia,stralloc *sa,unsigned long random) {
- struct mx { stralloc sa; unsigned short p; } *mx;
+int dns_mxip(ipalloc *ia, stralloc *sa, unsigned long random)
+{
+ struct mx {
+ stralloc sa;
+ unsigned short p;
+ } *mx;
struct ip_mx ix;
int nummx;
int i;
@@ -114,23 +129,25 @@ int dns_mxip(ipalloc *ia,stralloc *sa,unsigned long random) {
/* Case 1: sa is just IPv4 or IPv6 */
- if (!ipalloc_readyplus(ia,0)) return DNS_MEM;
+ if (!ipalloc_readyplus(ia, 0)) return DNS_MEM;
ia->len = 0;
- if (!stralloc_copys(&glue,sa->s)) return DNS_MEM;
+ if (!stralloc_copys(&glue, sa->s)) return DNS_MEM;
if (!stralloc_0(&glue)) return DNS_MEM;
if (glue.s[0]) {
ix.pref = 0;
- if (!glue.s[ip4_scan(glue.s,(char *)&ix.addr.ip4)] || \
- !glue.s[ip4_scanbracket(glue.s,(char *)&ix.addr.ip4)]) {
+ if (!glue.s[ip4_scan(glue.s, (char *)&ix.addr.ip4)]
+ || !glue.s[ip4_scanbracket(glue.s, (char *)&ix.addr.ip4)])
+ {
ix.af = AF_INET;
- if (!ipalloc_append(ia,&ix)) return DNS_MEM;
+ if (!ipalloc_append(ia, &ix)) return DNS_MEM;
return 0;
}
- if (!glue.s[ip6_scan(glue.s,(char *)&ix.addr.ip6)] || \
- !glue.s[ip6_scanbracket(glue.s,(char *)&ix.addr.ip6)]) {
+ if (!glue.s[ip6_scan(glue.s, (char *)&ix.addr.ip6)]
+ || !glue.s[ip6_scanbracket(glue.s, (char *)&ix.addr.ip6)])
+ {
ix.af = AF_INET6;
- if (!ipalloc_append(ia,&ix)) return DNS_MEM;
+ if (!ipalloc_append(ia, &ix)) return DNS_MEM;
return 0;
}
}
@@ -140,26 +157,27 @@ int dns_mxip(ipalloc *ia,stralloc *sa,unsigned long random) {
DNS_INIT
nummx = 0;
len = 0;
- i = dns_mx(&ip,sa);
- mx = (struct mx *) alloc(i * sizeof(struct mx));
+ i = dns_mx(&ip, sa);
+ mx = (struct mx *)alloc(i * sizeof(struct mx));
if (!mx) return DNS_MEM;
if (i) {
do {
- j = str_chr(ip.s + len + 2,'\0'); /* several answers */
+ j = str_chr(ip.s + len + 2, '\0'); /* several answers */
mx[nummx].sa.s = 0;
- if (!stralloc_copys(&mx[nummx].sa,ip.s + len + 2)) { /* mxhost name */
- alloc_free(mx); return DNS_MEM;
+ if (!stralloc_copys(&mx[nummx].sa, ip.s + len + 2)) { /* mxhost name */
+ alloc_free(mx);
+ return DNS_MEM;
}
ip.s[len + 3] = '\0';
- uint16_unpack_big(ip.s + len,&pref);
+ uint16_unpack_big(ip.s + len, &pref);
mx[nummx].p = pref;
len += j + 3;
++nummx;
} while (len < ip.len);
}
- if (!nummx) return dns_ipalloc(ia,sa); /* e.g., CNAME -> A */
+ if (!nummx) return dns_ipalloc(ia, sa); /* e.g., CNAME -> A */
flagsoft = 0;
while (nummx > 0) {
@@ -170,17 +188,17 @@ int dns_mxip(ipalloc *ia,stralloc *sa,unsigned long random) {
if (mx[j].p < mx[i].p) {
i = j;
numsame = 1;
- }
- else if (mx[j].p == mx[i].p) {
+ } else if (mx[j].p == mx[i].p) {
++numsame;
random = random * 69069 + 1;
if ((random / 2) < (2147483647 / numsame)) i = j;
}
}
- switch (dns_ipplus(ia,&mx[i].sa,mx[i].p)) {
+ switch (dns_ipplus(ia, &mx[i].sa, mx[i].p)) {
case -1: return DNS_MEM;
- case -2: case -3: flagsoft = -5; break;
+ case -2:
+ case -3: flagsoft = -5; break;
}
alloc_free(mx[i].sa.s);
@@ -191,11 +209,11 @@ int dns_mxip(ipalloc *ia,stralloc *sa,unsigned long random) {
return flagsoft;
}
-int dns_ip(ipalloc *ia,stralloc *sa)
+int dns_ip(ipalloc *ia, stralloc *sa)
{
- if (!ipalloc_readyplus(ia,0)) return DNS_MEM;
+ if (!ipalloc_readyplus(ia, 0)) return DNS_MEM;
ia->len = 0;
- return dns_ipplus(ia,sa,0);
+ return dns_ipplus(ia, sa, 0);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 11:21:25 +0000