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; |
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; |
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; |
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 |
|
|
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 */ |