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-rw-r--r--lib/libc/net/getnameinfo.c345
1 files changed, 7 insertions, 338 deletions
diff --git a/lib/libc/net/getnameinfo.c b/lib/libc/net/getnameinfo.c
index 15aa67d4648..95b27a70062 100644
--- a/lib/libc/net/getnameinfo.c
+++ b/lib/libc/net/getnameinfo.c
@@ -30,98 +30,19 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Craig Metz and
- * by other contributors.
- * 4. Neither the name of the author nor the names of contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Craig Metz and
- * by other contributors.
- * 4. Neither the name of the author nor the names of contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
*/
/* getnameinfo() v1.38 */
-/* To enable debugging support (REQUIRES NRL support library), define: */
-/* #define DEBUG 1 */
-
-#ifdef __OpenBSD__
-#define HAVE_POSIX1G_TYPES 1
-#define INET6 1
-#define LOCAL 1
-#define NETDB 1
-#define SALEN 1
-#undef RESOLVER
-#undef HOSTTABLE
-#undef DEBUG
-#undef HAVE_GETSERVBYNAME_R
-#undef HAVE_GETHOSTBYNAME2_R
-#endif /* __OpenBSD__ */
-
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
-#if LOCAL
#include <sys/un.h>
#include <sys/utsname.h>
-#endif /* LOCAL */
#include <netdb.h>
#include <errno.h>
#include <string.h>
-#if RESOLVER
-#include <arpa/nameser.h>
-#include <resolv.h>
-#endif /* RESOLVER */
-
-#include "support.h"
#ifndef AF_LOCAL
#define AF_LOCAL AF_UNIX
@@ -131,214 +52,11 @@
#define min(x,y) (((x) > (y)) ? (y) : (x))
#endif /* min */
-#if DEBUG
-#if RESOLVER
-#define DEBUG_MESSAGES (_res.options & RES_DEBUG)
-#else /* RESOLVER */
-int __getnameinfo_debug = 0;
-#define DEBUG_MESSAGES (__getnameinfo_debug)
-#endif /* RESOLVER */
-#endif /* DEBUG */
-
-#if DEBUG
#define RETURN_ERROR(x) do { \
- if (DEBUG_MESSAGES) \
- fprintf(stderr, "%s:%d: returning %s\n", __FILE__, __LINE__, #x); \
rval = (x); \
goto ret; \
} while(0)
-#else /* DEBUG */
-#define RETURN_ERROR(x) do { \
- rval = (x); \
- goto ret; \
- } while(0)
-#endif /* DEBUG */
-
-#if HOSTTABLE
-static int hosttable_lookup_name(int family, void *addr, char *name, int namelen, int flags)
-{
- int rval;
- FILE *f;
- char buffer[1024];
- char addrbuf[16];
- char *c, *c2;
- int i;
- char *prevcname = NULL;
-
- if (!(f = fopen("/etc/hosts", "r")))
- RETURN_ERROR(EAI_SYSTEM);
-
- while(fgets(buffer, sizeof(buffer), f)) {
- if (c = strchr(buffer, '#'))
- *c = 0;
-
- c = buffer;
- while(*c && !isspace(*c)) c++;
- if (!*c)
- continue;
-
- *(c++) = 0;
-
- if (family == AF_INET)
- if (inet_pton(AF_INET, buffer, addrbuf) > 0)
- if (!memcmp(addrbuf, addr, sizeof(struct in_addr)))
- goto build;
-
-#if INET6
- if (family == AF_INET6)
- if (inet_pton(AF_INET6, buffer, addrbuf) > 0)
- if (!memcmp(addrbuf, addr, sizeof(struct in6_addr)))
- goto build;
-#endif /* INET6 */
-
- continue;
-
-build:
- while(*c && isspace(*c)) c++;
- if (!*c)
- continue;
- c2 = c;
- while(*c2 && !isspace(*c2)) c2++;
- if (!*c2)
- continue;
- *c2 = 0;
-
- if ((flags & NI_NOFQDN) && (_res.options & RES_INIT) && _res.defdname[0] && (c2 = strstr(c + 1, _res.defdname)) && (*(--c2) == '.')) {
- *c2 = 0;
- i = min(c2 - c, namelen) - 1;
- strncpy(name, c, i);
- } else
- strncpy(name, c, namelen - 1);
-
- rval = 0;
- goto ret;
- };
-
- RETURN_ERROR(1);
-
-ret:
- fclose(f);
- return rval;
-};
-#endif /* HOSTTABLE */
-
-#if RESOLVER
-#if INET6
-static char hextab[] = { '0', '1', '2', '3', '4', '5', '6', '7',
- '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
-#endif /* INET6 */
-
-struct rrheader {
- int16_t type;
- int16_t class;
- u_int32_t ttl;
- int16_t size;
-};
-#define RRHEADER_SZ 10
-
-int resolver_lookup_name(const char *ptrname, char *name, int namelen, int flags)
-{
- int rval;
- char answer[PACKETSZ];
- int answerlen;
- char dn[MAXDNAME];
- char *prevcname = NULL;
- void *p, *ep;
- int answers, i;
- uint16_t rtype, rclass;
-
- if ((answerlen = res_search(ptrname, C_IN, T_PTR, answer, sizeof(answer))) < 0) {
- switch(h_errno) {
- case NETDB_INTERNAL:
- RETURN_ERROR(EAI_SYSTEM);
- case HOST_NOT_FOUND:
- RETURN_ERROR(1);
- case TRY_AGAIN:
- RETURN_ERROR(EAI_AGAIN);
- case NO_RECOVERY:
- RETURN_ERROR(EAI_FAIL);
- case NO_DATA:
- RETURN_ERROR(1);
- default:
- RETURN_ERROR(EAI_FAIL);
- };
- };
-
- p = answer;
- ep = answer + answerlen;
-
- if (answerlen < sizeof(HEADER))
- RETURN_ERROR(EAI_FAIL);
-
- {
- HEADER *h = (HEADER *)p;
- if (!h->qr || (h->opcode != QUERY) || (h->qdcount != htons(1)) || !h->ancount)
- RETURN_ERROR(EAI_FAIL);
-
- answers = ntohs(h->ancount);
- };
- p += sizeof(HEADER);
-
- if ((i = dn_expand(answer, ep, p, dn, sizeof(dn))) < 0)
- RETURN_ERROR(EAI_FAIL);
-
- p += i;
-
- if (p + 2*sizeof(u_int16_t) >= ep)
- RETURN_ERROR(EAI_FAIL);
-
- GETSHORT(rtype, p);
- GETSHORT(rclass, p);
-
- if ((rtype != T_PTR) || (rclass != C_IN))
- RETURN_ERROR(EAI_FAIL);
-
- while(answers--) {
- if ((i = dn_expand(answer, ep, p, dn, sizeof(dn))) < 0)
- RETURN_ERROR(EAI_FAIL);
-
- p += i;
-
- if (p + RRHEADER_SZ >= ep)
- RETURN_ERROR(EAI_FAIL);
-
- GETSHORT(rtype, p);
- GETSHORT(rclass, p);
- p += sizeof(uint32_t);
- if (rclass != C_IN)
- RETURN_ERROR(EAI_FAIL);
- GETSHORT(rclass, p);
- i = rclass;
-
- if (p + i > ep)
- RETURN_ERROR(EAI_FAIL);
-
- if (rtype == T_PTR) {
- if (dn_expand(answer, ep, p, dn, sizeof(dn)) != i)
- RETURN_ERROR(EAI_FAIL);
-
- {
- char *c2;
-
- if ((flags & NI_NOFQDN) && (_res.options & RES_INIT) && _res.defdname[0] && (c2 = strstr(dn + 1, _res.defdname)) && (*(--c2) == '.')) {
- *c2 = 0;
- strncpy(name, dn, min(c2 - dn, namelen) - 1);
- } else
- strncpy(name, dn, namelen - 1);
- };
- };
- p += i;
- };
-
- rval = 0;
-
-ret:
- return rval;
-};
-#endif /* RESOLVER */
-
-#if NETDB
static int netdb_lookup_name(int family, void *addr, int addrlen, char *name,
int namelen)
{
@@ -379,7 +97,6 @@ static int netdb_lookup_name(int family, void *addr, int addrlen, char *name,
ret:
return rval;
}
-#endif /* NETDB */
int getnameinfo(const struct sockaddr *sa, size_t addrlen, char *host, size_t hostlen, char *serv, size_t servlen, int flags)
{
@@ -391,7 +108,6 @@ int getnameinfo(const struct sockaddr *sa, size_t addrlen, char *host, size_t ho
if (host && (hostlen > 0))
switch(sa->sa_family) {
-#if INET6
case AF_INET6:
if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)sa)->sin6_addr)) {
if (flags & NI_NUMERICHOST)
@@ -404,9 +120,7 @@ int getnameinfo(const struct sockaddr *sa, size_t addrlen, char *host, size_t ho
if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)sa)->sin6_addr)) {
struct sockaddr_in sin;
memset(&sin, 0, sizeof(struct sockaddr_in));
-#if SALEN
sin.sin_len = sizeof(struct sockaddr_in);
-#endif /* SALEN */
sin.sin_family = AF_INET;
sin.sin_port = ((struct sockaddr_in6 *)sa)->sin6_port;
sin.sin_addr.s_addr = ((u_int32_t *)&((struct sockaddr_in6 *)sa)->sin6_addr)[3];
@@ -420,37 +134,13 @@ int getnameinfo(const struct sockaddr *sa, size_t addrlen, char *host, size_t ho
if (flags & NI_NUMERICHOST)
goto inet6_noname;
-#if HOSTTABLE
- if ((rval = hosttable_lookup_name(AF_INET6, &((struct sockaddr_in6 *)sa)->sin6_addr, host, hostlen, flags)) < 0)
+ if ((rval = netdb_lookup_name(AF_INET6,
+ &((struct sockaddr_in6 *)sa)->sin6_addr, sizeof(struct in6_addr),
+ host, hostlen, flags)) < 0)
goto ret;
-
+
if (!rval)
break;
-#endif /* HOSTTABLE */
-#if RESOLVER
- {
- char ptrname[sizeof("0.1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.0.1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.ip6.int.")];
- {
- int i;
- char *c = ptrname;
- u_int8_t *p = (u_int8_t *)&((struct sockaddr_in6 *)sa)->sin6_addr + sizeof(struct in6_addr) - 1;
-
- for (i = sizeof(struct in6_addr) / sizeof(u_int8_t); i > 0; i--, p--) {
- *(c++) = hextab[*p & 0x0f];
- *(c++) = '.';
- *(c++) = hextab[(*p & 0xf0) >> 4];
- *(c++) = '.';
- };
- strcpy(c, "ip6.int.");
- };
-
- if ((rval = resolver_lookup_name(ptrname, host, hostlen, flags)) < 0)
- goto ret;
-
- if (!rval)
- break;
- };
-#endif /* RESOLVER */
inet6_noname:
if (flags & NI_NAMEREQD)
@@ -460,7 +150,6 @@ inet6_noname:
RETURN_ERROR(EAI_NONAME);
break;
-#endif /* INET6 */
case AF_INET:
if (flags & NI_NUMERICHOST)
goto inet_noname;
@@ -470,27 +159,13 @@ inet6_noname:
break;
};
-#if HOSTTABLE
- if ((rval = hosttable_lookup_name(AF_INET, &((struct sockaddr_in *)sa)->sin_addr, host, hostlen, flags)) < 0)
+ if ((rval = netdb_lookup_name(AF_INET,
+ &((struct sockaddr_in *)sa)->sin_addr, sizeof(struct in_addr),
+ host, hostlen, flags)) < 0)
goto ret;
if (!rval)
break;
-#endif /* HOSTTABLE */
-#if RESOLVER
- {
- char ptrname[30];
- u_int8_t *p = (u_int8_t *)&((struct sockaddr_in *)sa)->sin_addr;
- sprintf(ptrname, "%d.%d.%d.%d.in-addr.arpa.", p[3], p[2], p[1], p[0]);
-
- if ((rval = resolver_lookup_name(ptrname, host, hostlen, flags)) < 0)
- goto ret;
-
- if (!rval)
- break;
- };
-#endif /* RESOLVER */
-
inet_noname:
if (flags & NI_NAMEREQD)
RETURN_ERROR(EAI_NONAME);
@@ -499,7 +174,6 @@ inet_noname:
RETURN_ERROR(EAI_NONAME);
break;
-#if LOCAL
case AF_LOCAL:
if (!(flags & NI_NUMERICHOST)) {
struct utsname utsname;
@@ -515,7 +189,6 @@ inet_noname:
strncpy(host, "localhost", hostlen - 1);
break;
-#endif /* LOCAL */
default:
RETURN_ERROR(EAI_FAMILY);
};
@@ -523,9 +196,7 @@ inet_noname:
if (serv && (servlen > 0))
switch(sa->sa_family) {
case AF_INET:
-#if INET6
case AF_INET6:
-#endif /* INET6 */
if (!(flags & NI_NUMERICSERV)) {
struct servent *s;
if (s = getservbyport(((struct sockaddr_in *)sa)->sin_port, (flags & NI_DGRAM) ? "udp" : "tcp")) {
@@ -539,11 +210,9 @@ inet_noname:
};
snprintf(serv, servlen - 1, "%d", ntohs(((struct sockaddr_in *)sa)->sin_port));
break;
-#if LOCAL
case AF_LOCAL:
strncpy(serv, ((struct sockaddr_un *)sa)->sun_path, servlen - 1);
break;
-#endif /* LOCAL */
};
if (host && (hostlen > 0))
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.