+/* vi: set sw=4 ts=4: */
/*
* stolen from net-tools-1.59 and stripped down for busybox by
- * Erik Andersen <andersee@debian.org>
+ * Erik Andersen <andersen@codepoet.org>
*
* Heavily modified by Manuel Novoa III Mar 12, 2001
*
- * Version: $Id: inet_common.c,v 1.2 2002/06/06 12:11:55 andersen Exp $
- *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
-#include "inet_common.h"
-#include <stdio.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
#include "libbb.h"
+#include "inet_common.h"
-#ifdef DEBUG
-#include <resolv.h>
+int FAST_FUNC INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst)
+{
+ struct hostent *hp;
+#if ENABLE_FEATURE_ETC_NETWORKS
+ struct netent *np;
#endif
+ /* Grmpf. -FvK */
+ s_in->sin_family = AF_INET;
+ s_in->sin_port = 0;
-const char bb_INET_default[]="default";
-
-int INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst)
-{
- struct hostent *hp;
- struct netent *np;
-
- /* Grmpf. -FvK */
- s_in->sin_family = AF_INET;
- s_in->sin_port = 0;
-
- /* Default is special, meaning 0.0.0.0. */
- if (!strcmp(name, bb_INET_default)) {
- s_in->sin_addr.s_addr = INADDR_ANY;
- return (1);
- }
- /* Look to see if it's a dotted quad. */
- if (inet_aton(name, &s_in->sin_addr)) {
- return 0;
- }
- /* If we expect this to be a hostname, try hostname database first */
+ /* Default is special, meaning 0.0.0.0. */
+ if (strcmp(name, "default") == 0) {
+ s_in->sin_addr.s_addr = INADDR_ANY;
+ return 1;
+ }
+ /* Look to see if it's a dotted quad. */
+ if (inet_aton(name, &s_in->sin_addr)) {
+ return 0;
+ }
+ /* If we expect this to be a hostname, try hostname database first */
+ if (hostfirst) {
#ifdef DEBUG
- if (hostfirst) fprintf (stderr, "gethostbyname (%s)\n", name);
+ bb_error_msg("gethostbyname(%s)", name);
#endif
- if (hostfirst &&
- (hp = gethostbyname(name)) != (struct hostent *) NULL) {
- memcpy((char *) &s_in->sin_addr, (char *) hp->h_addr_list[0],
- sizeof(struct in_addr));
- return 0;
- }
- /* Try the NETWORKS database to see if this is a known network. */
+ hp = gethostbyname(name);
+ if (hp) {
+ memcpy(&s_in->sin_addr, hp->h_addr_list[0],
+ sizeof(struct in_addr));
+ return 0;
+ }
+ }
+#if ENABLE_FEATURE_ETC_NETWORKS
+ /* Try the NETWORKS database to see if this is a known network. */
#ifdef DEBUG
- fprintf (stderr, "getnetbyname (%s)\n", name);
+ bb_error_msg("getnetbyname(%s)", name);
#endif
- if ((np = getnetbyname(name)) != (struct netent *) NULL) {
- s_in->sin_addr.s_addr = htonl(np->n_net);
- return 1;
- }
- if (hostfirst) {
- /* Don't try again */
- errno = h_errno;
- return -1;
- }
-#ifdef DEBUG
- res_init();
- _res.options |= RES_DEBUG;
+ np = getnetbyname(name);
+ if (np) {
+ s_in->sin_addr.s_addr = htonl(np->n_net);
+ return 1;
+ }
#endif
-
+ if (hostfirst) {
+ /* Don't try again */
+ return -1;
+ }
#ifdef DEBUG
- fprintf (stderr, "gethostbyname (%s)\n", name);
+ res_init();
+ _res.options |= RES_DEBUG;
+ bb_error_msg("gethostbyname(%s)", name);
#endif
- if ((hp = gethostbyname(name)) == (struct hostent *) NULL) {
- errno = h_errno;
- return -1;
- }
- memcpy((char *) &s_in->sin_addr, (char *) hp->h_addr_list[0],
- sizeof(struct in_addr));
-
- return 0;
+ hp = gethostbyname(name);
+ if (!hp) {
+ return -1;
+ }
+ memcpy(&s_in->sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
+ return 0;
}
-/* cache */
-struct addr {
- struct sockaddr_in addr;
- char *name;
- int host;
- struct addr *next;
-};
-static struct addr *INET_nn = NULL; /* addr-to-name cache */
-
-/* numeric: & 0x8000: default instead of *,
+/* numeric: & 0x8000: "default" instead of "*",
* & 0x4000: host instead of net,
* & 0x0fff: don't resolve
*/
-int INET_rresolve(char *name, size_t len, struct sockaddr_in *s_in,
- int numeric, unsigned int netmask)
+char* FAST_FUNC INET_rresolve(struct sockaddr_in *s_in, int numeric, uint32_t netmask)
{
- struct hostent *ent;
- struct netent *np;
- struct addr *pn;
- unsigned long ad, host_ad;
- int host = 0;
-
- /* Grmpf. -FvK */
- if (s_in->sin_family != AF_INET) {
+ /* addr-to-name cache */
+ struct addr {
+ struct addr *next;
+ uint32_t nip;
+ smallint is_host;
+ char name[1];
+ };
+ static struct addr *cache = NULL;
+
+ struct addr *pn;
+ char *name;
+ uint32_t nip;
+ smallint is_host;
+
+ if (s_in->sin_family != AF_INET) {
#ifdef DEBUG
- fprintf(stderr, "rresolve: unsupport address family %d !\n", s_in->sin_family);
+ bb_error_msg("rresolve: unsupported address family %d!",
+ s_in->sin_family);
#endif
- errno = EAFNOSUPPORT;
- return (-1);
- }
- ad = (unsigned long) s_in->sin_addr.s_addr;
+ errno = EAFNOSUPPORT;
+ return NULL;
+ }
+ nip = s_in->sin_addr.s_addr;
#ifdef DEBUG
- fprintf (stderr, "rresolve: %08lx, mask %08x, num %08x \n", ad, netmask, numeric);
+ bb_error_msg("rresolve: %08x mask:%08x num:%08x", (unsigned)nip, netmask, numeric);
#endif
- if (ad == INADDR_ANY) {
- if ((numeric & 0x0FFF) == 0) {
- if (numeric & 0x8000)
- safe_strncpy(name, bb_INET_default, len);
- else
- safe_strncpy(name, "*", len);
- return (0);
+ if (numeric & 0x0FFF)
+ return xmalloc_sockaddr2dotted_noport((void*)s_in);
+ if (nip == INADDR_ANY) {
+ if (numeric & 0x8000)
+ return xstrdup("default");
+ return xstrdup("*");
}
- }
- if (numeric & 0x0FFF) {
- safe_strncpy(name, inet_ntoa(s_in->sin_addr), len);
- return (0);
- }
-
- if ((ad & (~netmask)) != 0 || (numeric & 0x4000))
- host = 1;
-#if 0
- INET_nn = NULL;
-#endif
- pn = INET_nn;
- while (pn != NULL) {
- if (pn->addr.sin_addr.s_addr == ad && pn->host == host) {
- safe_strncpy(name, pn->name, len);
+
+ is_host = ((nip & (~netmask)) != 0 || (numeric & 0x4000));
+
+ pn = cache;
+ while (pn) {
+ if (pn->nip == nip && pn->is_host == is_host) {
#ifdef DEBUG
- fprintf (stderr, "rresolve: found %s %08lx in cache\n", (host? "host": "net"), ad);
+ bb_error_msg("rresolve: found %s %08x in cache",
+ (is_host ? "host" : "net"), (unsigned)nip);
#endif
- return (0);
+ return xstrdup(pn->name);
+ }
+ pn = pn->next;
}
- pn = pn->next;
- }
- host_ad = ntohl(ad);
- np = NULL;
- ent = NULL;
- if (host) {
+ name = NULL;
+ if (is_host) {
#ifdef DEBUG
- fprintf (stderr, "gethostbyaddr (%08lx)\n", ad);
+ bb_error_msg("sockaddr2host_noport(%08x)", (unsigned)nip);
#endif
- ent = gethostbyaddr((char *) &ad, 4, AF_INET);
- if (ent != NULL)
- safe_strncpy(name, ent->h_name, len);
- } else {
+ name = xmalloc_sockaddr2host_noport((void*)s_in);
+ } else if (ENABLE_FEATURE_ETC_NETWORKS) {
+ struct netent *np;
#ifdef DEBUG
- fprintf (stderr, "getnetbyaddr (%08lx)\n", host_ad);
+ bb_error_msg("getnetbyaddr(%08x)", (unsigned)ntohl(nip));
#endif
- np = getnetbyaddr(host_ad, AF_INET);
- if (np != NULL)
- safe_strncpy(name, np->n_name, len);
- }
- if ((ent == NULL) && (np == NULL))
- safe_strncpy(name, inet_ntoa(s_in->sin_addr), len);
- pn = (struct addr *) xmalloc(sizeof(struct addr));
- pn->addr = *s_in;
- pn->next = INET_nn;
- pn->host = host;
- pn->name = xstrdup(name);
- INET_nn = pn;
-
- return (0);
+ np = getnetbyaddr(ntohl(nip), AF_INET);
+ if (np)
+ name = xstrdup(np->n_name);
+ }
+ if (!name)
+ name = xmalloc_sockaddr2dotted_noport((void*)s_in);
+
+ pn = xmalloc(sizeof(*pn) + strlen(name)); /* no '+ 1', it's already accounted for */
+ pn->next = cache;
+ pn->nip = nip;
+ pn->is_host = is_host;
+ strcpy(pn->name, name);
+ cache = pn;
+
+ return name;
+}
+
+#if ENABLE_FEATURE_IPV6
+
+int FAST_FUNC INET6_resolve(const char *name, struct sockaddr_in6 *sin6)
+{
+ struct addrinfo req, *ai = NULL;
+ int s;
+
+ memset(&req, 0, sizeof(req));
+ req.ai_family = AF_INET6;
+ s = getaddrinfo(name, NULL, &req, &ai);
+ if (s != 0) {
+ bb_error_msg("getaddrinfo: %s: %d", name, s);
+ return -1;
+ }
+ memcpy(sin6, ai->ai_addr, sizeof(*sin6));
+ freeaddrinfo(ai);
+ return 0;
+}
+
+#ifndef IN6_IS_ADDR_UNSPECIFIED
+# define IN6_IS_ADDR_UNSPECIFIED(a) \
+ (((uint32_t *) (a))[0] == 0 && ((uint32_t *) (a))[1] == 0 && \
+ ((uint32_t *) (a))[2] == 0 && ((uint32_t *) (a))[3] == 0)
+#endif
+
+
+char* FAST_FUNC INET6_rresolve(struct sockaddr_in6 *sin6, int numeric)
+{
+ if (sin6->sin6_family != AF_INET6) {
+#ifdef DEBUG
+ bb_error_msg("rresolve: unsupported address family %d!",
+ sin6->sin6_family);
+#endif
+ errno = EAFNOSUPPORT;
+ return NULL;
+ }
+ if (numeric & 0x7FFF) {
+ return xmalloc_sockaddr2dotted_noport((void*)sin6);
+ }
+ if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+ if (numeric & 0x8000)
+ return xstrdup("default");
+ return xstrdup("*");
+ }
+
+ return xmalloc_sockaddr2host_noport((void*)sin6);
}
+
+#endif /* CONFIG_FEATURE_IPV6 */
projects / oweals / busybox.git / blobdiff