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Diffstat (limited to 'lib/libc/net/res_send.c')
-rw-r--r--lib/libc/net/res_send.c105
1 files changed, 69 insertions, 36 deletions
diff --git a/lib/libc/net/res_send.c b/lib/libc/net/res_send.c
index 895db8110bd2..fade45ee0d65 100644
--- a/lib/libc/net/res_send.c
+++ b/lib/libc/net/res_send.c
@@ -109,8 +109,11 @@ static int use_poll = 1; /* adapt to poll() syscall availability */
static int s = -1; /* socket used for communications */
static int connected = 0; /* is the socket connected */
static int vc = 0; /* is the socket a virtual circuit? */
+static int af = 0; /* address family of socket */
static res_send_qhook Qhook = NULL;
static res_send_rhook Rhook = NULL;
+static char abuf[NI_MAXHOST];
+static char pbuf[32];
#define CAN_RECONNECT 1
@@ -131,16 +134,16 @@ static res_send_rhook Rhook = NULL;
FILE *file;
char *string;
int error;
- struct sockaddr_in address;
+ struct sockaddr *address;
{
int save = errno;
if (_res.options & RES_DEBUG) {
- fprintf(file, "res_send: %s ([%s].%u): %s\n",
- string,
- inet_ntoa(address.sin_addr),
- ntohs(address.sin_port),
- strerror(error));
+ getnameinfo(address, address->sa_len, abuf, sizeof(abuf),
+ pbuf, sizeof(pbuf),
+ NI_NUMERICHOST|NI_NUMERICSERV|NI_WITHSCOPEID);
+ fprintf(file, "res_send: %s ([%s].%s): %s\n",
+ string, abuf, pbuf, strerror(error));
}
errno = save;
}
@@ -189,21 +192,40 @@ int
res_isourserver(inp)
const struct sockaddr_in *inp;
{
- struct sockaddr_in ina;
+ struct sockaddr_in6 *in6p = (struct sockaddr_in6 *)inp;
+ const struct sockaddr_in6 *srv6;
+ const struct sockaddr_in *srv;
int ns, ret;
- ina = *inp;
ret = 0;
- for (ns = 0; ns < _res.nscount; ns++) {
- const struct sockaddr_in *srv = &_res.nsaddr_list[ns];
-
- if (srv->sin_family == ina.sin_family &&
- srv->sin_port == ina.sin_port &&
- (srv->sin_addr.s_addr == INADDR_ANY ||
- srv->sin_addr.s_addr == ina.sin_addr.s_addr)) {
- ret++;
- break;
+ switch (inp->sin_family) {
+ case AF_INET6:
+ for (ns = 0; ns < _res.nscount; ns++) {
+ srv6 = (struct sockaddr_in6 *)&_res_ext.nsaddr_list[ns];
+ if (srv6->sin6_family == in6p->sin6_family &&
+ srv6->sin6_port == in6p->sin6_port &&
+ srv6->sin6_scope_id == in6p->sin6_scope_id &&
+ (memcmp(&srv6->sin6_addr, &in6addr_any,
+ sizeof(struct in6_addr)) == 0 ||
+ memcmp(&srv6->sin6_addr, &in6p->sin6_addr,
+ sizeof(struct in6_addr)) == 0)) {
+ ret++;
+ break;
+ }
+ }
+ break;
+ case AF_INET:
+ for (ns = 0; ns < _res.nscount; ns++) {
+ srv = (struct sockaddr_in *)&_res_ext.nsaddr_list[ns];
+ if (srv->sin_family == inp->sin_family &&
+ srv->sin_port == inp->sin_port &&
+ (srv->sin_addr.s_addr == INADDR_ANY ||
+ srv->sin_addr.s_addr == inp->sin_addr.s_addr)) {
+ ret++;
+ break;
+ }
}
+ break;
}
return (ret);
}
@@ -332,7 +354,8 @@ res_send(buf, buflen, ans, anssiz)
*/
for (try = 0; try < _res.retry; try++) {
for (ns = 0; ns < _res.nscount; ns++) {
- struct sockaddr_in *nsap = &_res.nsaddr_list[ns];
+ struct sockaddr *nsap = (struct sockaddr *)
+ &_res_ext.nsaddr_list[ns];
same_ns:
if (badns & (1 << ns)) {
res_close();
@@ -345,7 +368,8 @@ res_send(buf, buflen, ans, anssiz)
do {
res_sendhookact act;
- act = (*Qhook)(&nsap, &buf, &buflen,
+ act = (*Qhook)((struct sockaddr_in **)&nsap,
+ &buf, &buflen,
ans, anssiz, &resplen);
switch (act) {
case res_goahead:
@@ -369,9 +393,12 @@ res_send(buf, buflen, ans, anssiz)
} while (!done);
}
- Dprint(_res.options & RES_DEBUG,
+ Dprint((_res.options & RES_DEBUG) &&
+ getnameinfo(nsap, nsap->sa_len, abuf, sizeof(abuf),
+ NULL, 0,
+ NI_NUMERICHOST | NI_WITHSCOPEID) == 0,
(stdout, ";; Querying server (# %d) address = %s\n",
- ns + 1, inet_ntoa(nsap->sin_addr)));
+ ns + 1, abuf));
if (v_circuit) {
int truncated;
@@ -385,11 +412,13 @@ res_send(buf, buflen, ans, anssiz)
*/
try = _res.retry;
truncated = 0;
- if (s < 0 || !vc || hp->opcode == ns_o_update) {
+ if (s < 0 || !vc || hp->opcode == ns_o_update ||
+ af != nsap->sa_family) {
if (s >= 0)
res_close();
- s = socket(PF_INET, SOCK_STREAM, 0);
+ af = nsap->sa_family;
+ s = socket(af, SOCK_STREAM, 0);
if (s < 0) {
terrno = errno;
Perror(stderr, "socket(vc)", errno);
@@ -397,10 +426,10 @@ res_send(buf, buflen, ans, anssiz)
}
errno = 0;
if (connect(s, (struct sockaddr *)nsap,
- sizeof *nsap) < 0) {
+ nsap->sa_len) < 0) {
terrno = errno;
Aerror(stderr, "connect/vc",
- errno, *nsap);
+ errno, nsap);
badns |= (1 << ns);
res_close();
goto next_ns;
@@ -530,13 +559,14 @@ read_len:
struct timeval timeout;
fd_set dsmask, *dsmaskp;
int dsmasklen;
- struct sockaddr_in from;
+ struct sockaddr_storage from;
int fromlen;
- if ((s < 0) || vc) {
+ if (s < 0 || vc || af != nsap->sa_family) {
if (vc)
res_close();
- s = socket(PF_INET, SOCK_DGRAM, 0);
+ af = nsap->sa_family;
+ s = socket(af, SOCK_DGRAM, 0);
if (s < 0) {
#ifndef CAN_RECONNECT
bad_dg_sock:
@@ -570,11 +600,11 @@ read_len:
*/
if (!connected) {
if (connect(s, (struct sockaddr *)nsap,
- sizeof *nsap
+ nsap->sa_len
) < 0) {
Aerror(stderr,
"connect(dg)",
- errno, *nsap);
+ errno, nsap);
badns |= (1 << ns);
res_close();
goto next_ns;
@@ -594,6 +624,7 @@ read_len:
*/
if (connected) {
#ifdef CAN_RECONNECT
+ /* XXX: any errornous address */
struct sockaddr_in no_addr;
no_addr.sin_family = AF_INET;
@@ -604,7 +635,7 @@ read_len:
&no_addr,
sizeof no_addr);
#else
- int s1 = socket(PF_INET, SOCK_DGRAM,0);
+ int s1 = socket(af, SOCK_DGRAM,0);
if (s1 < 0)
goto bad_dg_sock;
(void)dup2(s1, s);
@@ -618,9 +649,9 @@ read_len:
#endif /* !CANNOT_CONNECT_DGRAM */
if (sendto(s, (char*)buf, buflen, 0,
(struct sockaddr *)nsap,
- sizeof *nsap)
+ nsap->sa_len)
!= buflen) {
- Aerror(stderr, "sendto", errno, *nsap);
+ Aerror(stderr, "sendto", errno, nsap);
badns |= (1 << ns);
res_close();
goto next_ns;
@@ -749,7 +780,7 @@ read_len:
goto next_ns;
}
errno = 0;
- fromlen = sizeof(struct sockaddr_in);
+ fromlen = sizeof(from);
resplen = recvfrom(s, (char*)ans, anssiz, 0,
(struct sockaddr *)&from, &fromlen);
if (resplen <= 0) {
@@ -784,7 +815,7 @@ read_len:
}
#ifdef CHECK_SRVR_ADDR
if (!(_res.options & RES_INSECURE1) &&
- !res_isourserver(&from)) {
+ !res_isourserver((struct sockaddr_in *)&from)) {
/*
* response from wrong server? ignore it.
* XXX - potential security hazard could
@@ -861,7 +892,8 @@ read_len:
do {
res_sendhookact act;
- act = (*Rhook)(nsap, buf, buflen,
+ act = (*Rhook)((struct sockaddr_in *)nsap,
+ buf, buflen,
ans, anssiz, &resplen);
switch (act) {
case res_goahead:
@@ -914,6 +946,7 @@ res_close()
s = -1;
connected = 0;
vc = 0;
+ af = 0;
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 09:57:30 +0000