summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--src/network/getnameinfo.c58
-rw-r--r--src/network/lookup.h1
-rw-r--r--src/network/lookup_ipliteral.c51
-rw-r--r--src/network/lookup_name.c41
-rw-r--r--src/network/res_msend.c21
5 files changed, 122 insertions, 50 deletions
diff --git a/src/network/getnameinfo.c b/src/network/getnameinfo.c
index 6962ed1a..708ec5e0 100644
--- a/src/network/getnameinfo.c
+++ b/src/network/getnameinfo.c
@@ -6,6 +6,9 @@
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
+#include <ctype.h>
+#include "lookup.h"
+#include "stdio_impl.h"
int __dns_parse(const unsigned char *, int, int (*)(void *, int, const void *, int, const void *), void *);
int __dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int);
@@ -42,6 +45,47 @@ static void mkptr6(char *s, const unsigned char *ip)
strcpy(s, "ip6.arpa");
}
+static char *reverse_hosts(char *buf, const unsigned char *a, unsigned scopeid, int family)
+{
+ char line[512], *p, *z;
+ unsigned char _buf[1032], atmp[16];
+ struct address iplit;
+ FILE _f, *f = __fopen_rb_ca("/etc/hosts", &_f, _buf, sizeof _buf);
+ if (!f) return 0;
+ if (family == AF_INET) {
+ memcpy(atmp+12, a, 4);
+ memcpy(atmp, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
+ a = atmp;
+ }
+ while (fgets(line, sizeof line, f)) {
+ if ((p=strchr(line, '#'))) *p++='\n', *p=0;
+
+ for (p=line; *p && !isspace(*p); p++);
+ *p++ = 0;
+ if (__lookup_ipliteral(&iplit, line, AF_UNSPEC)<=0)
+ continue;
+
+ if (iplit.family == AF_INET) {
+ memcpy(iplit.addr+12, iplit.addr, 4);
+ memcpy(iplit.addr, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
+ iplit.scopeid = 0;
+ }
+
+ if (memcmp(a, iplit.addr, 16) || iplit.scopeid != scopeid)
+ continue;
+
+ for (; *p && isspace(*p); p++);
+ for (z=p; *z && !isspace(*z); z++);
+ *z = 0;
+ if (z-p < 256) {
+ memcpy(buf, p, z-p+1);
+ break;
+ }
+ }
+ __fclose_ca(f);
+ return 0;
+}
+
static int dns_parse_callback(void *c, int rr, const void *data, int len, const void *packet)
{
char tmp[256];
@@ -62,13 +106,14 @@ int getnameinfo(const struct sockaddr *restrict sa, socklen_t sl,
char buf[256], num[3*sizeof(int)+1];
int af = sa->sa_family;
unsigned char *a;
- unsigned x;
+ unsigned scopeid;
switch (af) {
case AF_INET:
a = (void *)&((struct sockaddr_in *)sa)->sin_addr;
if (sl != sizeof(struct sockaddr_in)) return EAI_FAMILY;
mkptr4(ptr, a);
+ scopeid = 0;
break;
case AF_INET6:
a = (void *)&((struct sockaddr_in6 *)sa)->sin6_addr;
@@ -77,6 +122,7 @@ int getnameinfo(const struct sockaddr *restrict sa, socklen_t sl,
mkptr6(ptr, a);
else
mkptr4(ptr, a+12);
+ scopeid = ((struct sockaddr_in6 *)sa)->sin6_scope_id;
break;
default:
return EAI_FAMILY;
@@ -85,6 +131,9 @@ int getnameinfo(const struct sockaddr *restrict sa, socklen_t sl,
if (node && nodelen) {
buf[0] = 0;
if (!(flags & NI_NUMERICHOST)) {
+ reverse_hosts(buf, a, scopeid, af);
+ }
+ if (!*buf && !(flags & NI_NUMERICHOST)) {
unsigned char query[18+PTR_MAX], reply[512];
int qlen = __res_mkquery(0, ptr, 1, RR_PTR,
0, 0, 0, query, sizeof query);
@@ -96,15 +145,14 @@ int getnameinfo(const struct sockaddr *restrict sa, socklen_t sl,
if (!*buf) {
if (flags & NI_NAMEREQD) return EAI_NONAME;
inet_ntop(af, a, buf, sizeof buf);
- if (af == AF_INET6 &&
- (x = ((struct sockaddr_in6 *)sa)->sin6_scope_id)) {
+ if (scopeid) {
char *p = 0, tmp[IF_NAMESIZE+1];
if (!(flags & NI_NUMERICSCOPE) &&
(IN6_IS_ADDR_LINKLOCAL(a) ||
IN6_IS_ADDR_MC_LINKLOCAL(a)))
- p = if_indextoname(x, tmp+1);
+ p = if_indextoname(scopeid, tmp+1);
if (!p)
- p = itoa(num, x);
+ p = itoa(num, scopeid);
*--p = '%';
strcat(buf, p);
}
diff --git a/src/network/lookup.h b/src/network/lookup.h
index 82c969ec..19c9e488 100644
--- a/src/network/lookup.h
+++ b/src/network/lookup.h
@@ -22,5 +22,6 @@ struct service {
int __lookup_serv(struct service buf[static MAXSERVS], const char *name, int proto, int flags);
int __lookup_name(struct address buf[static MAXADDRS], char canon[static 256], const char *name, int family, int flags);
+int __lookup_ipliteral(struct address buf[static 1], const char *name, int family);
#endif
diff --git a/src/network/lookup_ipliteral.c b/src/network/lookup_ipliteral.c
new file mode 100644
index 00000000..8dacffc1
--- /dev/null
+++ b/src/network/lookup_ipliteral.c
@@ -0,0 +1,51 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include "lookup.h"
+
+int __inet_aton(const char *, struct in_addr *);
+
+int __lookup_ipliteral(struct address buf[static 1], const char *name, int family)
+{
+ struct in_addr a4;
+ struct in6_addr a6;
+ if (family != AF_INET6 && __inet_aton(name, &a4)>0) {
+ memcpy(&buf[0].addr, &a4, sizeof a4);
+ buf[0].family = AF_INET;
+ buf[0].scopeid = 0;
+ return 1;
+ }
+ if (family != AF_INET) {
+ char tmp[64];
+ char *p = strchr(name, '%'), *z;
+ unsigned long long scopeid;
+ if (p && p-name < 64) {
+ memcpy(tmp, name, p-name);
+ tmp[p-name] = 0;
+ name = tmp;
+ }
+ if (inet_pton(AF_INET6, name, &a6)<=0) return 0;
+ memcpy(&buf[0].addr, &a6, sizeof a6);
+ buf[0].family = AF_INET6;
+ if (p) {
+ if (isdigit(*++p)) scopeid = strtoull(p, &z, 10);
+ else z = p-1;
+ if (*z) {
+ if (!IN6_IS_ADDR_LINKLOCAL(&a6) &&
+ !IN6_IS_ADDR_MC_LINKLOCAL(&a6))
+ return EAI_NONAME;
+ scopeid = if_nametoindex(p);
+ if (!scopeid) return EAI_NONAME;
+ }
+ if (scopeid > UINT_MAX) return EAI_NONAME;
+ buf[0].scopeid = scopeid;
+ }
+ return 1;
+ }
+ return 0;
+}
diff --git a/src/network/lookup_name.c b/src/network/lookup_name.c
index 492e932c..f324e547 100644
--- a/src/network/lookup_name.c
+++ b/src/network/lookup_name.c
@@ -37,45 +37,9 @@ static int name_from_null(struct address buf[static 2], const char *name, int fa
return cnt;
}
-int __inet_aton(const char *, struct in_addr *);
-
static int name_from_numeric(struct address buf[static 1], const char *name, int family)
{
- struct in_addr a4;
- struct in6_addr a6;
- if (family != AF_INET6 && __inet_aton(name, &a4)>0) {
- memcpy(&buf[0].addr, &a4, sizeof a4);
- buf[0].family = AF_INET;
- return 1;
- }
- if (family != AF_INET) {
- char tmp[64];
- char *p = strchr(name, '%'), *z;
- unsigned long long scopeid;
- if (p && p-name < 64) {
- memcpy(tmp, name, p-name);
- tmp[p-name] = 0;
- name = tmp;
- }
- if (inet_pton(AF_INET6, name, &a6)<=0) return 0;
- memcpy(&buf[0].addr, &a6, sizeof a6);
- buf[0].family = AF_INET6;
- if (p) {
- if (isdigit(*++p)) scopeid = strtoull(p, &z, 10);
- else z = p-1;
- if (*z) {
- if (!IN6_IS_ADDR_LINKLOCAL(&a6) &&
- !IN6_IS_ADDR_MC_LINKLOCAL(&a6))
- return EAI_NONAME;
- scopeid = if_nametoindex(p);
- if (!scopeid) return EAI_NONAME;
- }
- if (scopeid > UINT_MAX) return EAI_NONAME;
- buf[0].scopeid = scopeid;
- }
- return 1;
- }
- return 0;
+ return __lookup_ipliteral(buf, name, family);
}
static int name_from_hosts(struct address buf[static MAXADDRS], char canon[static 256], const char *name, int family)
@@ -133,11 +97,13 @@ static int dns_parse_callback(void *c, int rr, const void *data, int len, const
case RR_A:
if (len != 4) return -1;
ctx->addrs[ctx->cnt].family = AF_INET;
+ ctx->addrs[ctx->cnt].scopeid = 0;
memcpy(ctx->addrs[ctx->cnt++].addr, data, 4);
break;
case RR_AAAA:
if (len != 16) return -1;
ctx->addrs[ctx->cnt].family = AF_INET6;
+ ctx->addrs[ctx->cnt].scopeid = 0;
memcpy(ctx->addrs[ctx->cnt++].addr, data, 16);
break;
case RR_CNAME:
@@ -227,7 +193,6 @@ int __lookup_name(struct address buf[static MAXADDRS], char canon[static 256], c
if (buf[i].family != AF_INET) continue;
memcpy(buf[i].addr+12, buf[i].addr, 4);
memcpy(buf[i].addr, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
- buf[i].scopeid = 0;
buf[i].family = AF_INET6;
}
}
diff --git a/src/network/res_msend.c b/src/network/res_msend.c
index a5b7793a..5192b4d8 100644
--- a/src/network/res_msend.c
+++ b/src/network/res_msend.c
@@ -12,6 +12,7 @@
#include <pthread.h>
#include "stdio_impl.h"
#include "syscall.h"
+#include "lookup.h"
static void cleanup(void *p)
{
@@ -47,6 +48,7 @@ int __res_msend(int nqueries, const unsigned char *const *queries,
int cs;
struct pollfd pfd;
unsigned long t0, t1, t2;
+ struct address iplit;
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
@@ -76,13 +78,18 @@ int __res_msend(int nqueries, const unsigned char *const *queries,
for (z=s; *z && !isspace(*z); z++);
*z=0;
- if (inet_pton(AF_INET, s, &ns[nns].sin.sin_addr)>0) {
- ns[nns].sin.sin_port = htons(53);
- ns[nns++].sin.sin_family = AF_INET;
- } else if (inet_pton(AF_INET6, s, &ns[nns].sin6.sin6_addr)>0) {
- sl = sizeof sa.sin6;
- ns[nns].sin6.sin6_port = htons(53);
- ns[nns++].sin6.sin6_family = family = AF_INET6;
+ if (__lookup_ipliteral(&iplit, s, AF_UNSPEC)>0) {
+ if (iplit.family == AF_INET) {
+ memcpy(&ns[nns].sin.sin_addr, iplit.addr, 4);
+ ns[nns].sin.sin_port = htons(53);
+ ns[nns++].sin.sin_family = AF_INET;
+ } else {
+ sl = sizeof sa.sin6;
+ memcpy(&ns[nns].sin6.sin6_addr, iplit.addr, 16);
+ ns[nns].sin6.sin6_port = htons(53);
+ ns[nns].sin6.sin6_scope_id = iplit.scopeid;
+ ns[nns++].sin6.sin6_family = family = AF_INET6;
+ }
}
}
if (f) __fclose_ca(f);
generated by cgit v1.2.1 (git 2.18.0) at 2025-10-31 11:25:15 +0000