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Diffstat (limited to 'libc/inet')
-rw-r--r--libc/inet/resolv.c416
1 files changed, 197 insertions, 219 deletions
diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c
index e377c3883..c6807aae1 100644
--- a/libc/inet/resolv.c
+++ b/libc/inet/resolv.c
@@ -151,6 +151,7 @@
#include <netdb.h>
#include <ctype.h>
#include <stdbool.h>
+#include <time.h>
#include <arpa/nameser.h>
#include <sys/utsname.h>
#include <sys/un.h>
@@ -219,6 +220,13 @@
/* libc_hidden_proto(__ctype_b) */
#endif
+#if defined __UCLIBC_HAS_IPV4__ && defined __UCLIBC_HAS_IPV6__
+#define IF_HAS_BOTH(...) __VA_ARGS__
+#else
+#define IF_HAS_BOTH(...)
+#endif
+
+
extern int __libc_getdomainname(char *name, size_t len);
libc_hidden_proto(__libc_getdomainname)
@@ -919,13 +927,22 @@ static char *skip_and_NUL_space(char *p)
/* Must be called under __resolv_lock. */
void attribute_hidden __open_nameservers(void)
{
+ static uint8_t last_time;
+
char szBuffer[MAXLEN_searchdomain];
FILE *fp;
int i;
sockaddr46_t sa;
- //if (!__res_sync && last_time_was_long_ago)
- // __close_nameservers(); /* force config reread */
+ if (!__res_sync) {
+ /* Provide for periodic reread of /etc/resolv.conf */
+ /* cur_time "ticks" every 256 seconds */
+ uint8_t cur_time = ((unsigned)time(NULL)) >> 8;
+ if (last_time != cur_time) {
+ last_time = cur_time;
+ __close_nameservers(); /* force config reread */
+ }
+ }
if (__nameservers)
goto sync;
@@ -1290,14 +1307,18 @@ int attribute_hidden __dns_lookup(const char *name, int type,
h_errno = HOST_NOT_FOUND;
goto fail1;
}
- if (h.rcode != 0) /* error */
- goto try_next_sdomain;
- /* code below won't work correctly with h.ancount == 0, so... */
+ /* Insert other non-fatal errors here, which do not warrant
+ * switching to next nameserver */
+
+ /* Strange error, assuming this nameserver is feeling bad */
+ if (h.rcode != 0)
+ goto try_next_server;
+
+ /* Code below won't work correctly with h.ancount == 0, so... */
if (h.ancount <= 0) {
h_errno = NO_DATA; /* is this correct code? */
goto fail1;
}
-
pos = HFIXEDSZ;
for (j = 0; j < h.qdcount; j++) {
DPRINTF("Skipping question %d at %d\n", j, pos);
@@ -1313,11 +1334,11 @@ int attribute_hidden __dns_lookup(const char *name, int type,
i = __decode_answer(packet, pos, len, &ma);
if (i < 0) {
DPRINTF("failed decode %d\n", i);
- /* if the message was truncated and we have
+ /* If the message was truncated but we have
* decoded some answers, pretend it's OK */
if (j && h.tc)
break;
- goto try_next_sdomain;
+ goto try_next_server;
}
pos += i;
@@ -1345,14 +1366,14 @@ int attribute_hidden __dns_lookup(const char *name, int type,
free(a->dotted);
DPRINTF("Answer address len(%u) differs from original(%u)\n",
ma.rdlength, a->rdlength);
- goto try_next_sdomain;
+ goto try_next_server;
}
memcpy(a->buf + (a->add_count * ma.rdlength), ma.rdata, ma.rdlength);
++a->add_count;
}
}
- /* success! */
+ /* Success! */
DPRINTF("Answer name = |%s|\n", a->dotted);
DPRINTF("Answer type = |%d|\n", a->atype);
if (fd != -1)
@@ -1364,20 +1385,8 @@ int attribute_hidden __dns_lookup(const char *name, int type,
free(lookup);
return len;
-//TODO: audit whether *any* "goto try_next_sdomain" is actually correct:
-//trying next search domain makes sense only if we got NXDOMAIN!
-//why we do it in other cases too?
- try_next_sdomain:
- /* if there are searchdomains, try them */
- if (!ends_with_dot) {
- if (variant < sdomains - 1) {
- /* next search */
- variant++;
- continue;
- }
- }
try_next_server:
- /* if there are other nameservers, try them */
+ /* Try next nameserver */
local_ns_num++;
variant = -1;
} while (retries_left > 0);
@@ -1415,53 +1424,40 @@ int attribute_hidden __read_etc_hosts_r(
struct hostent ** result,
int * h_errnop)
{
- struct in_addr *in = NULL;
struct in_addr **addr_list = NULL;
-#ifdef __UCLIBC_HAS_IPV6__
- struct in6_addr *in6 = NULL;
- struct in6_addr **addr_list6 = NULL;
-#endif /* __UCLIBC_HAS_IPV6__ */
+ struct in_addr *in = NULL;
char *cp, **alias;
int aliases, i, ret = HOST_NOT_FOUND;
- /* make sure user char * is aligned */
+ *h_errnop = NETDB_INTERNAL;
+
+ /* make sure pointer is aligned */
i = ALIGN_BUFFER_OFFSET(buf);
buf += i;
buflen -= i;
-
+ /* Layout in buf:
+ * char *alias[ALIAS_DIM];
+ * struct in[6]_addr* addr_list[2];
+ * struct in[6]_addr* in;
+ * char line_buffer[80+];
+ */
+#define in6 ((struct in6_addr *)in)
alias = (char **)buf;
buf += sizeof(char **) * ALIAS_DIM;
buflen -= sizeof(char **) * ALIAS_DIM;
if ((ssize_t)buflen < 0)
return ERANGE;
-
if (action != GETHOSTENT) {
-#ifdef __UCLIBC_HAS_IPV6__
- char *p = buf;
- size_t len = buflen;
-#endif
- *h_errnop = NETDB_INTERNAL;
+ addr_list = (struct in_addr**)buf;
+ buf += sizeof(*addr_list) * 2;
+ buflen -= sizeof(*addr_list) * 2;
in = (struct in_addr*)buf;
+#ifndef __UCLIBC_HAS_IPV6__
buf += sizeof(*in);
buflen -= sizeof(*in);
- addr_list = (struct in_addr **)buf;
- buf += sizeof(*addr_list) * 2;
- buflen -= sizeof(*addr_list) * 2;
- if ((ssize_t)buflen < 0)
- return ERANGE;
-#ifdef __UCLIBC_HAS_IPV6__
- in6 = (struct in6_addr*)p;
- p += sizeof(*in6);
- len -= sizeof(*in6);
- addr_list6 = (struct in6_addr**)p;
- p += sizeof(*addr_list6) * 2;
- len -= sizeof(*addr_list6) * 2;
- if ((ssize_t)len < 0)
- return ERANGE;
- if (len < buflen) {
- buflen = len;
- buf = p;
- }
+#else
+ buf += sizeof(*in6);
+ buflen -= sizeof(*in6);
#endif
if ((ssize_t)buflen < 80)
return ERANGE;
@@ -1472,12 +1468,12 @@ int attribute_hidden __read_etc_hosts_r(
return errno;
}
}
+ addr_list[0] = in;
+ addr_list[1] = NULL;
*h_errnop = HOST_NOT_FOUND;
while (fgets(buf, buflen, fp)) {
- cp = strchr(buf, '#');
- if (cp)
- *cp = '\0';
+ *strchrnul(buf, '#') = '\0';
DPRINTF("Looking at: %s\n", buf);
aliases = 0;
@@ -1487,7 +1483,7 @@ int attribute_hidden __read_etc_hosts_r(
*cp++ = '\0';
if (!*cp)
break;
- if (aliases < (2+MAX_ALIASES))
+ if (aliases < (2 + MAX_ALIASES))
alias[aliases++] = cp;
while (*cp && !isspace(*cp))
cp++;
@@ -1508,32 +1504,31 @@ int attribute_hidden __read_etc_hosts_r(
/* GET_HOSTS_BYNAME */
for (i = 1; i < aliases; i++)
if (strcasecmp(name, alias[i]) == 0)
- break;
- if (i >= aliases)
- continue;
+ goto found;
+ continue;
+ found: ;
}
- if (type == AF_INET && inet_pton(AF_INET, alias[0], in) > 0) {
+ if (0) /* nothing */;
+#ifdef __UCLIBC_HAS_IPV4__
+ else if (type == AF_INET && inet_pton(AF_INET, alias[0], in) > 0) {
DPRINTF("Found INET\n");
- addr_list[0] = in;
- addr_list[1] = NULL;
- result_buf->h_name = alias[1];
result_buf->h_addrtype = AF_INET;
result_buf->h_length = sizeof(*in);
+ result_buf->h_name = alias[1];
result_buf->h_addr_list = (char**) addr_list;
result_buf->h_aliases = alias + 2;
*result = result_buf;
ret = NETDB_SUCCESS;
}
+#endif
#ifdef __UCLIBC_HAS_IPV6__
else if (type == AF_INET6 && inet_pton(AF_INET6, alias[0], in6) > 0) {
DPRINTF("Found INET6\n");
- addr_list6[0] = in6;
- addr_list6[1] = NULL;
- result_buf->h_name = alias[1];
result_buf->h_addrtype = AF_INET6;
result_buf->h_length = sizeof(*in6);
- result_buf->h_addr_list = (char**) addr_list6;
+ result_buf->h_name = alias[1];
+ result_buf->h_addr_list = (char**) addr_list;
result_buf->h_aliases = alias + 2;
*result = result_buf;
ret = NETDB_SUCCESS;
@@ -1557,6 +1552,7 @@ int attribute_hidden __read_etc_hosts_r(
if (action != GETHOSTENT)
fclose(fp);
return ret;
+#undef in6
}
#endif
@@ -1587,19 +1583,21 @@ int attribute_hidden __get_hosts_byaddr_r(const char * addr, int len, int type,
char ipaddr[INET_ADDRSTRLEN];
#else
char ipaddr[INET6_ADDRSTRLEN];
-#endif /* __UCLIBC_HAS_IPV6__ */
+#endif
switch (type) {
+#ifdef __UCLIBC_HAS_IPV4__
case AF_INET:
if (len != sizeof(struct in_addr))
return 0;
break;
+#endif
#ifdef __UCLIBC_HAS_IPV6__
case AF_INET6:
if (len != sizeof(struct in6_addr))
return 0;
break;
-#endif /* __UCLIBC_HAS_IPV6__ */
+#endif
default:
return 0;
}
@@ -1627,24 +1625,23 @@ int getnameinfo(const struct sockaddr *sa, socklen_t addrlen, char *host,
return EAI_BADFLAGS;
if (sa == NULL || addrlen < sizeof(sa_family_t))
- goto BAD_FAM;
+ return EAI_FAMILY;
ok = sa->sa_family;
if (ok == AF_LOCAL) /* valid */;
#ifdef __UCLIBC_HAS_IPV4__
else if (ok == AF_INET) {
if (addrlen < sizeof(struct sockaddr_in))
- goto BAD_FAM;
+ return EAI_FAMILY;
}
#endif
#ifdef __UCLIBC_HAS_IPV6__
else if (ok == AF_INET6) {
if (addrlen < sizeof(struct sockaddr_in6))
- goto BAD_FAM;
+ return EAI_FAMILY;
}
-#endif /* __UCLIBC_HAS_IPV6__ */
+#endif
else
-BAD_FAM:
return EAI_FAMILY;
ok = 0;
@@ -1813,6 +1810,8 @@ libc_hidden_def(getnameinfo)
#ifdef L_gethostbyname_r
+//Does this function assume IPv4? If yes,
+//what happens in IPv6-only build?
/* Bug 671 says:
* "uClibc resolver's gethostbyname does not return the requested name
@@ -1892,23 +1891,23 @@ int gethostbyname_r(const char * name,
i = strlen(name) + 1;
if ((ssize_t)buflen <= i)
return ERANGE;
- strcpy(buf, name);
+ memcpy(buf, name, i); /* paranoia: name might change */
alias0 = buf;
buf += i;
buflen -= i;
-
/* make sure pointer is aligned */
i = ALIGN_BUFFER_OFFSET(buf);
buf += i;
buflen -= i;
-
+ /* Layout in buf:
+ * char *alias[2];
+ * struct in_addr* addr_list[NN+1];
+ * struct in_addr* in[NN];
+ */
alias = (char **)buf;
buf += sizeof(alias[0]) * 2;
buflen -= sizeof(alias[0]) * 2;
-
addr_list = (struct in_addr **)buf;
-
- /* do not use *buf or buflen before this verification! */
/* buflen may be < 0, must do signed compare */
if ((ssize_t)buflen < 256)
return ERANGE;
@@ -1946,18 +1945,16 @@ int gethostbyname_r(const char * name,
}
/* talk to DNS servers */
- {
- a.buf = buf;
- /* take into account that at least one address will be there,
- * we'll need space of one in_addr + two addr_list[] elems */
- a.buflen = buflen - ((sizeof(addr_list[0]) * 2 + sizeof(struct in_addr)));
- a.add_count = 0;
- i = __dns_lookup(name, T_A, &packet, &a);
- if (i < 0) {
- *h_errnop = HOST_NOT_FOUND;
- DPRINTF("__dns_lookup returned < 0\n");
- return TRY_AGAIN;
- }
+ a.buf = buf;
+ /* take into account that at least one address will be there,
+ * we'll need space of one in_addr + two addr_list[] elems */
+ a.buflen = buflen - ((sizeof(addr_list[0]) * 2 + sizeof(struct in_addr)));
+ a.add_count = 0;
+ i = __dns_lookup(name, T_A, &packet, &a);
+ if (i < 0) {
+ *h_errnop = HOST_NOT_FOUND;
+ DPRINTF("__dns_lookup returned < 0\n");
+ return TRY_AGAIN;
}
if (a.atype == T_A) { /* ADDRESS */
@@ -2093,7 +2090,11 @@ int gethostbyname2_r(const char *name,
i = ALIGN_BUFFER_OFFSET(buf);
buf += i;
buflen -= i;
-
+ /* Layout in buf:
+ * struct in6_addr* in;
+ * struct in6_addr* addr_list[2];
+ * char scratch_buf[256];
+ */
in = (struct in6_addr*)buf;
buf += sizeof(*in);
buflen -= sizeof(*in);
@@ -2105,6 +2106,7 @@ int gethostbyname2_r(const char *name,
addr_list[0] = in;
addr_list[1] = NULL;
strncpy(buf, name, buflen);
+ buf[buflen] = '\0';
/* maybe it is already an address? */
if (inet_pton(AF_INET6, name, in)) {
@@ -2112,6 +2114,7 @@ int gethostbyname2_r(const char *name,
result_buf->h_addrtype = AF_INET6;
result_buf->h_length = sizeof(*in);
result_buf->h_addr_list = (char **) addr_list;
+ //result_buf->h_aliases = ???
*result = result_buf;
*h_errnop = NETDB_SUCCESS;
return NETDB_SUCCESS;
@@ -2129,48 +2132,46 @@ int gethostbyname2_r(const char *name,
// TODO: why it's so different from gethostbyname_r (IPv4 case)?
memset(&a, '\0', sizeof(a));
for (;;) {
+// Hmm why we memset(a) to zeros only once?
i = __dns_lookup(buf, T_AAAA, &packet, &a);
-
if (i < 0) {
*h_errnop = HOST_NOT_FOUND;
return TRY_AGAIN;
}
-
strncpy(buf, a.dotted, buflen);
free(a.dotted);
- if (a.atype == T_CNAME) { /* CNAME */
- DPRINTF("Got a CNAME in gethostbyname()\n");
- i = __decode_dotted(packet, a.rdoffset, buf, buflen);
- free(packet);
+ if (a.atype != T_CNAME)
+ break;
- if (i < 0) {
- *h_errnop = NO_RECOVERY;
- return -1;
- }
- if (++nest > MAX_RECURSE) {
- *h_errnop = NO_RECOVERY;
- return -1;
- }
- continue;
+ DPRINTF("Got a CNAME in gethostbyname()\n");
+ if (++nest > MAX_RECURSE) {
+ *h_errnop = NO_RECOVERY;
+ return -1;
}
- if (a.atype == T_AAAA) { /* ADDRESS */
- memcpy(in, a.rdata, sizeof(*in));
- result_buf->h_name = buf;
- result_buf->h_addrtype = AF_INET6;
- result_buf->h_length = sizeof(*in);
- result_buf->h_addr_list = (char **) addr_list;
- free(packet);
- break;
+ i = __decode_dotted(packet, a.rdoffset, buf, buflen);
+ free(packet);
+ if (i < 0) {
+ *h_errnop = NO_RECOVERY;
+ return -1;
}
+ }
+ if (a.atype == T_AAAA) { /* ADDRESS */
+ memcpy(in, a.rdata, sizeof(*in));
+ result_buf->h_name = buf;
+ result_buf->h_addrtype = AF_INET6;
+ result_buf->h_length = sizeof(*in);
+ result_buf->h_addr_list = (char **) addr_list;
+ //result_buf->h_aliases = ???
free(packet);
- *h_errnop = HOST_NOT_FOUND;
- return TRY_AGAIN;
+ *result = result_buf;
+ *h_errnop = NETDB_SUCCESS;
+ return NETDB_SUCCESS;
}
+ free(packet);
+ *h_errnop = HOST_NOT_FOUND;
+ return TRY_AGAIN;
- *result = result_buf;
- *h_errnop = NETDB_SUCCESS;
- return NETDB_SUCCESS;
#endif /* __UCLIBC_HAS_IPV6__ */
}
libc_hidden_def(gethostbyname2_r)
@@ -2179,7 +2180,7 @@ libc_hidden_def(gethostbyname2_r)
#ifdef L_gethostbyaddr_r
-int gethostbyaddr_r(const void *addr, socklen_t len, int type,
+int gethostbyaddr_r(const void *addr, socklen_t addrlen, int type,
struct hostent * result_buf,
char * buf, size_t buflen,
struct hostent ** result,
@@ -2188,12 +2189,6 @@ int gethostbyaddr_r(const void *addr, socklen_t len, int type,
{
struct in_addr *in;
struct in_addr **addr_list;
-#ifdef __UCLIBC_HAS_IPV6__
- char *qp;
- size_t plen;
- struct in6_addr *in6;
- struct in6_addr **addr_list6;
-#endif /* __UCLIBC_HAS_IPV6__ */
char **alias;
unsigned char *packet;
struct resolv_answer a;
@@ -2204,25 +2199,25 @@ int gethostbyaddr_r(const void *addr, socklen_t len, int type,
if (!addr)
return EINVAL;
- memset(&a, '\0', sizeof(a));
-
switch (type) {
+#ifdef __UCLIBC_HAS_IPV4__
case AF_INET:
- if (len != sizeof(struct in_addr))
+ if (addrlen != sizeof(struct in_addr))
return EINVAL;
break;
+#endif
#ifdef __UCLIBC_HAS_IPV6__
case AF_INET6:
- if (len != sizeof(struct in6_addr))
+ if (addrlen != sizeof(struct in6_addr))
return EINVAL;
break;
-#endif /* __UCLIBC_HAS_IPV6__ */
+#endif
default:
return EINVAL;
}
/* do /etc/hosts first */
- i = __get_hosts_byaddr_r(addr, len, type, result_buf,
+ i = __get_hosts_byaddr_r(addr, addrlen, type, result_buf,
buf, buflen, result, h_errnop);
if (i == 0)
return i;
@@ -2240,68 +2235,59 @@ int gethostbyaddr_r(const void *addr, socklen_t len, int type,
i = ALIGN_BUFFER_OFFSET(buf);
buf += i;
buflen -= i;
-
-#ifdef __UCLIBC_HAS_IPV6__
- qp = buf;
- plen = buflen;
-#endif
- in = (struct in_addr*)buf;
- buf += sizeof(*in);
- buflen -= sizeof(*in);
- addr_list = (struct in_addr**)buf;
- buf += sizeof(*addr_list) * 2;
- buflen -= sizeof(*addr_list) * 2;
+ /* Layout in buf:
+ * char *alias[ALIAS_DIM];
+ * struct in[6]_addr* addr_list[2];
+ * struct in[6]_addr* in;
+ * char scratch_buffer[256+];
+ */
+#define in6 ((struct in6_addr *)in)
alias = (char **)buf;
buf += sizeof(*alias) * ALIAS_DIM;
buflen -= sizeof(*alias) * ALIAS_DIM;
- if ((ssize_t)buflen < 0)
- return ERANGE;
-#ifdef __UCLIBC_HAS_IPV6__
- in6 = (struct in6_addr*)qp;
- qp += sizeof(*in6);
- plen -= sizeof(*in6);
- addr_list6 = (struct in6_addr**)qp;
- qp += sizeof(*addr_list6) * 2;
- plen -= sizeof(*addr_list6) * 2;
- if ((ssize_t)plen < 0)
- return ERANGE;
- if (plen < buflen) {
- buflen = plen;
- buf = qp;
- }
+ addr_list = (struct in_addr**)buf;
+ buf += sizeof(*addr_list) * 2;
+ buflen -= sizeof(*addr_list) * 2;
+ in = (struct in_addr*)buf;
+#ifndef __UCLIBC_HAS_IPV6__
+ buf += sizeof(*in);
+ buflen -= sizeof(*in);
+#else
+ buf += sizeof(*in6);
+ buflen -= sizeof(*in6);
#endif
- if (buflen < 256)
+ if ((ssize_t)buflen < 256)
return ERANGE;
+ alias[0] = buf;
+ alias[1] = NULL;
+ addr_list[0] = in;
+ addr_list[1] = NULL;
+ memcpy(&in, addr, addrlen);
- if (type == AF_INET) {
- unsigned char *tmp_addr = (unsigned char *)addr;
-
- memcpy(&in->s_addr, addr, len);
- addr_list[0] = in;
+ if (0) /* nothing */;
+#ifdef __UCLIBC_HAS_IPV4__
+ else IF_HAS_BOTH(if (type == AF_INET)) {
+ unsigned char *tp = (unsigned char *)addr;
sprintf(buf, "%u.%u.%u.%u.in-addr.arpa",
- tmp_addr[3], tmp_addr[2], tmp_addr[1], tmp_addr[0]);
+ tp[3], tp[2], tp[1], tp[0]);
}
+#endif
#ifdef __UCLIBC_HAS_IPV6__
else {
- memcpy(in6->s6_addr, addr, len);
- addr_list6[0] = in6;
- qp = buf;
- for (i = len - 1; i >= 0; i--) {
- qp += sprintf(qp, "%x.%x.",
- in6->s6_addr[i] & 0xf,
- (in6->s6_addr[i] >> 4) & 0xf);
- }
- strcpy(qp, "ip6.arpa");
+ char *dst = buf;
+ unsigned char *tp = (unsigned char *)addr + addrlen - 1;
+ do {
+ dst += sprintf(dst, "%x.%x.", tp[i] & 0xf, tp[i] >> 4);
+ tp--;
+ } while (tp >= (unsigned char *)addr);
+ strcpy(dst, "ip6.arpa");
}
#endif
- addr_list[1] = NULL;
-
- alias[0] = buf;
- alias[1] = NULL;
+ memset(&a, '\0', sizeof(a));
for (;;) {
+// Hmm why we memset(a) to zeros only once?
i = __dns_lookup(buf, T_PTR, &packet, &a);
-
if (i < 0) {
*h_errnop = HOST_NOT_FOUND;
return TRY_AGAIN;
@@ -2309,48 +2295,40 @@ int gethostbyaddr_r(const void *addr, socklen_t len, int type,
strncpy(buf, a.dotted, buflen);
free(a.dotted);
+ if (a.atype != T_CNAME)
+ break;
- if (a.atype == T_CNAME) { /* CNAME */
- DPRINTF("Got a CNAME in gethostbyaddr()\n");
- i = __decode_dotted(packet, a.rdoffset, buf, buflen);
- free(packet);
-
- if (i < 0) {
- *h_errnop = NO_RECOVERY;
- return -1;
- }
- if (++nest > MAX_RECURSE) {
- *h_errnop = NO_RECOVERY;
- return -1;
- }
- continue;
+ DPRINTF("Got a CNAME in gethostbyaddr()\n");
+ if (++nest > MAX_RECURSE) {
+ *h_errnop = NO_RECOVERY;
+ return -1;
}
-
- if (a.atype == T_PTR) { /* ADDRESS */
- i = __decode_dotted(packet, a.rdoffset, buf, buflen);
- free(packet);
-
- result_buf->h_name = buf;
- result_buf->h_addrtype = type;
- if (type == AF_INET)
- result_buf->h_length = sizeof(*in);
-#ifdef __UCLIBC_HAS_IPV6__
- else
- result_buf->h_length = sizeof(*in6);
-#endif
- result_buf->h_addr_list = (char **) addr_list;
- result_buf->h_aliases = alias;
- break;
+ /* Decode CNAME into buf, feed it to __dns_lookup() again */
+ i = __decode_dotted(packet, a.rdoffset, buf, buflen);
+ free(packet);
+ if (i < 0) {
+ *h_errnop = NO_RECOVERY;
+ return -1;
}
+ }
+ if (a.atype == T_PTR) { /* ADDRESS */
+ i = __decode_dotted(packet, a.rdoffset, buf, buflen);
free(packet);
- *h_errnop = NO_ADDRESS;
- return TRY_AGAIN;
+ result_buf->h_name = buf;
+ result_buf->h_addrtype = type;
+ result_buf->h_length = addrlen;
+ result_buf->h_addr_list = (char **) addr_list;
+ result_buf->h_aliases = alias;
+ *result = result_buf;
+ *h_errnop = NETDB_SUCCESS;
+ return NETDB_SUCCESS;
}
- *result = result_buf;
- *h_errnop = NETDB_SUCCESS;
- return NETDB_SUCCESS;
+ free(packet);
+ *h_errnop = NO_ADDRESS;
+ return TRY_AGAIN;
+#undef in6
}
libc_hidden_def(gethostbyaddr_r)
#endif
@@ -2605,7 +2583,7 @@ int ns_name_ntop(const u_char *src, char *dst, size_t dstsiz)
__set_errno(EMSGSIZE);
return -1;
}
- for ((void)NULL; n > 0; n--) {
+ for (; n > 0; n--) {
c = *cp++;
if (special(c)) {
if (dn + 1 >= eom) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 22:57:11 +0000