Diff of /trunk/mkinitrd-magellan/busybox/libbb/inet_common.c

Parent Directory | Revision Log | Patch

	revision 532 by niro, Sat Sep 1 22:45:15 2007 UTC	revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
#	Line 5	Line 5
5	*	*
6	* Heavily modified by Manuel Novoa III       Mar 12, 2001	* Heavily modified by Manuel Novoa III       Mar 12, 2001
7	*	*
	* Version:     $Id: inet_common.c,v 1.1 2007-09-01 22:43:51 niro Exp $
8	*	*
9	*/	*/
10
11	#include "libbb.h"	#include "libbb.h"
12	#include "inet_common.h"	#include "inet_common.h"
13
14	int INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst)	int FAST_FUNC INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst)
15	{	{
16	struct hostent *hp;	struct hostent *hp;
17		#if ENABLE_FEATURE_ETC_NETWORKS
18	struct netent *np;	struct netent *np;
19		#endif
20
21	/* Grmpf. -FvK */	/* Grmpf. -FvK */
22	s_in->sin_family = AF_INET;	s_in->sin_family = AF_INET;
#	Line 33  int INET_resolve(const char *name, struc	Line 34  int INET_resolve(const char *name, struc
34	/* If we expect this to be a hostname, try hostname database first */	/* If we expect this to be a hostname, try hostname database first */
35	#ifdef DEBUG	#ifdef DEBUG
36	if (hostfirst) {	if (hostfirst) {
37	bb_error_msg("gethostbyname (%s)", name);	bb_error_msg("gethostbyname(%s)", name);
38	}	}
39	#endif	#endif
40	if (hostfirst && (hp = gethostbyname(name)) != (struct hostent *) NULL) {	if (hostfirst) {
41	memcpy((char *) &s_in->sin_addr, (char *) hp->h_addr_list[0],	hp = gethostbyname(name);
42	sizeof(struct in_addr));	if (hp != NULL) {
43	return 0;	memcpy(&s_in->sin_addr, hp->h_addr_list[0],
44		sizeof(struct in_addr));
45		return 0;
46		}
47	}	}
48		#if ENABLE_FEATURE_ETC_NETWORKS
49	/* Try the NETWORKS database to see if this is a known network. */	/* Try the NETWORKS database to see if this is a known network. */
50	#ifdef DEBUG	#ifdef DEBUG
51	bb_error_msg("getnetbyname (%s)", name);	bb_error_msg("getnetbyname(%s)", name);
52	#endif	#endif
53	if ((np = getnetbyname(name)) != (struct netent *) NULL) {	np = getnetbyname(name);
54		if (np != NULL) {
55	s_in->sin_addr.s_addr = htonl(np->n_net);	s_in->sin_addr.s_addr = htonl(np->n_net);
56	return 1;	return 1;
57	}	}
58		#endif
59	if (hostfirst) {	if (hostfirst) {
60	/* Don't try again */	/* Don't try again */
61	return -1;	return -1;
#	Line 56  int INET_resolve(const char *name, struc	Line 63  int INET_resolve(const char *name, struc
63	#ifdef DEBUG	#ifdef DEBUG
64	res_init();	res_init();
65	_res.options |= RES_DEBUG;	_res.options |= RES_DEBUG;
66		bb_error_msg("gethostbyname(%s)", name);
67	#endif	#endif
68		hp = gethostbyname(name);
69	#ifdef DEBUG	if (hp == NULL) {
	bb_error_msg("gethostbyname (%s)", name);
	#endif
	if ((hp = gethostbyname(name)) == (struct hostent *) NULL) {
70	return -1;	return -1;
71	}	}
72	memcpy((char *) &s_in->sin_addr, (char *) hp->h_addr_list[0],	memcpy(&s_in->sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
	sizeof(struct in_addr));
73	return 0;	return 0;
74	}	}
75
	/* cache */
	struct addr {
	struct sockaddr_in addr;
	char *name;
	int host;
	struct addr *next;
	};
	static struct addr *INET_nn = NULL; /* addr-to-name cache           */
76
77	/* numeric: & 0x8000: default instead of *,	/* numeric: & 0x8000: default instead of *,
78	*          & 0x4000: host instead of net,	*          & 0x4000: host instead of net,
79	*          & 0x0fff: don't resolve	*          & 0x0fff: don't resolve
80	*/	*/
81	int INET_rresolve(char *name, size_t len, struct sockaddr_in *s_in,	char* FAST_FUNC INET_rresolve(struct sockaddr_in *s_in, int numeric, uint32_t netmask)
	int numeric, unsigned int netmask)
82	{	{
83	struct hostent *ent;	/* addr-to-name cache */
84	struct netent *np;	struct addr {
85		struct addr *next;
86		struct sockaddr_in addr;
87		int host;
88		char name[1];
89		};
90		static struct addr *cache = NULL;
91
92	struct addr *pn;	struct addr *pn;
93	unsigned long ad, host_ad;	char *name;
94		uint32_t ad, host_ad;
95	int host = 0;	int host = 0;
96
	/* Grmpf. -FvK */
97	if (s_in->sin_family != AF_INET) {	if (s_in->sin_family != AF_INET) {
98	#ifdef DEBUG	#ifdef DEBUG
99	bb_error_msg("rresolve: unsupport address family %d !",	bb_error_msg("rresolve: unsupported address family %d!",
100	s_in->sin_family);	s_in->sin_family);
101	#endif	#endif
102	errno = EAFNOSUPPORT;	errno = EAFNOSUPPORT;
103	return -1;	return NULL;
104	}	}
105	ad = (unsigned long) s_in->sin_addr.s_addr;	ad = s_in->sin_addr.s_addr;
106	#ifdef DEBUG	#ifdef DEBUG
107	bb_error_msg("rresolve: %08lx, mask %08x, num %08x", ad, netmask, numeric);	bb_error_msg("rresolve: %08x, mask %08x, num %08x", (unsigned)ad, netmask, numeric);
108	#endif	#endif
109	if (ad == INADDR_ANY) {	if (ad == INADDR_ANY) {
110	if ((numeric & 0x0FFF) == 0) {	if ((numeric & 0x0FFF) == 0) {
111	if (numeric & 0x8000)	if (numeric & 0x8000)
112	safe_strncpy(name, bb_str_default, len);	return xstrdup(bb_str_default);
113	else	return xstrdup("*");
	safe_strncpy(name, "*", len);
	return 0;
114	}	}
115	}	}
116	if (numeric & 0x0FFF) {	if (numeric & 0x0FFF)
117	safe_strncpy(name, inet_ntoa(s_in->sin_addr), len);	return xstrdup(inet_ntoa(s_in->sin_addr));
	return 0;
	}
118
119	if ((ad & (~netmask)) != 0 || (numeric & 0x4000))	if ((ad & (~netmask)) != 0 || (numeric & 0x4000))
120	host = 1;	host = 1;
121	pn = INET_nn;	pn = cache;
122	while (pn != NULL) {	while (pn) {
123	if (pn->addr.sin_addr.s_addr == ad && pn->host == host) {	if (pn->addr.sin_addr.s_addr == ad && pn->host == host) {
	safe_strncpy(name, pn->name, len);
124	#ifdef DEBUG	#ifdef DEBUG
125	bb_error_msg("rresolve: found %s %08lx in cache",	bb_error_msg("rresolve: found %s %08x in cache",
126	(host ? "host" : "net"), ad);	(host ? "host" : "net"), (unsigned)ad);
127	#endif	#endif
128	return 0;	return xstrdup(pn->name);
129	}	}
130	pn = pn->next;	pn = pn->next;
131	}	}
132
133	host_ad = ntohl(ad);	host_ad = ntohl(ad);
134	np = NULL;	name = NULL;
	ent = NULL;
135	if (host) {	if (host) {
136		struct hostent *ent;
137	#ifdef DEBUG	#ifdef DEBUG
138	bb_error_msg("gethostbyaddr (%08lx)", ad);	bb_error_msg("gethostbyaddr (%08x)", (unsigned)ad);
139	#endif	#endif
140	ent = gethostbyaddr((char *) &ad, 4, AF_INET);	ent = gethostbyaddr((char *) &ad, 4, AF_INET);
141	if (ent != NULL) {	if (ent)
142	safe_strncpy(name, ent->h_name, len);	name = xstrdup(ent->h_name);
143	}	} else if (ENABLE_FEATURE_ETC_NETWORKS) {
144	} else {	struct netent *np;
145	#ifdef DEBUG	#ifdef DEBUG
146	bb_error_msg("getnetbyaddr (%08lx)", host_ad);	bb_error_msg("getnetbyaddr (%08x)", (unsigned)host_ad);
147	#endif	#endif
148	np = getnetbyaddr(host_ad, AF_INET);	np = getnetbyaddr(host_ad, AF_INET);
149	if (np != NULL) {	if (np)
150	safe_strncpy(name, np->n_name, len);	name = xstrdup(np->n_name);
	}
151	}	}
152	if ((ent == NULL) && (np == NULL)) {	if (!name)
153	safe_strncpy(name, inet_ntoa(s_in->sin_addr), len);	name = xstrdup(inet_ntoa(s_in->sin_addr));
154	}	pn = xmalloc(sizeof(*pn) + strlen(name)); /* no '+ 1', it's already accounted for */
155	pn = xmalloc(sizeof(struct addr));	pn->next = cache;
156	pn->addr = *s_in;	pn->addr = *s_in;
	pn->next = INET_nn;
157	pn->host = host;	pn->host = host;
158	pn->name = xstrdup(name);	strcpy(pn->name, name);
159	INET_nn = pn;	cache = pn;
160		return name;
	return 0;
161	}	}
162
163	#ifdef CONFIG_FEATURE_IPV6	#if ENABLE_FEATURE_IPV6
164
165	int INET6_resolve(const char *name, struct sockaddr_in6 *sin6)	int FAST_FUNC INET6_resolve(const char *name, struct sockaddr_in6 *sin6)
166	{	{
167	struct addrinfo req, *ai;	struct addrinfo req, *ai;
168	int s;	int s;
#	Line 183  int INET6_resolve(const char *name, stru	Line 175  int INET6_resolve(const char *name, stru
175	return -1;	return -1;
176	}	}
177	memcpy(sin6, ai->ai_addr, sizeof(struct sockaddr_in6));	memcpy(sin6, ai->ai_addr, sizeof(struct sockaddr_in6));
178	freeaddrinfo(ai);	freeaddrinfo(ai);
179	return 0;	return 0;
180	}	}
181
#	Line 196  int INET6_resolve(const char *name, stru	Line 186  int INET6_resolve(const char *name, stru
186	#endif	#endif
187
188
189	int INET6_rresolve(char *name, size_t len, struct sockaddr_in6 *sin6,	char* FAST_FUNC INET6_rresolve(struct sockaddr_in6 *sin6, int numeric)
	int numeric)
190	{	{
191		char name[128];
192	int s;	int s;
193
	/* Grmpf. -FvK */
194	if (sin6->sin6_family != AF_INET6) {	if (sin6->sin6_family != AF_INET6) {
195	#ifdef DEBUG	#ifdef DEBUG
196	bb_error_msg("rresolve: unsupport address family %d!",	bb_error_msg("rresolve: unsupport address family %d!",
197	sin6->sin6_family);	sin6->sin6_family);
198	#endif	#endif
199	errno = EAFNOSUPPORT;	errno = EAFNOSUPPORT;
200	return -1;	return NULL;
201	}	}
202	if (numeric & 0x7FFF) {	if (numeric & 0x7FFF) {
203	inet_ntop(AF_INET6, &sin6->sin6_addr, name, len);	inet_ntop(AF_INET6, &sin6->sin6_addr, name, sizeof(name));
204	return 0;	return xstrdup(name);
205	}	}
206	if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {	if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
207	if (numeric & 0x8000) {	if (numeric & 0x8000)
208	strcpy(name, bb_str_default);	return xstrdup(bb_str_default);
209	} else {	return xstrdup("*");
	name[0] = '*';
	name[1] = '\0';
	}
	return 0;
210	}	}
211
212	s = getnameinfo((struct sockaddr *) sin6, sizeof(struct sockaddr_in6), name, len, NULL, 0, 0);	s = getnameinfo((struct sockaddr *) sin6, sizeof(struct sockaddr_in6),
213		name, sizeof(name), NULL, 0, 0);
214	if (s) {	if (s) {
215	bb_error_msg("getnameinfo failed");	bb_error_msg("getnameinfo failed");
216	return -1;	return NULL;
217	}	}
218	return 0;	return xstrdup(name);
219	}	}
220
221	#endif /* CONFIG_FEATURE_IPV6 */	#endif /* CONFIG_FEATURE_IPV6 */

---

Colored Diff Long Colored Diff Full Colored Diff Unidiff Context Diff Side by Side

Legend: Removed from v.532   changed lines   Added in v.816