1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2010 Bernhard Reutner-Fischer <uclibc@uclibc.org>
*
* Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
*/
/* /etc/networks
# network-name number [aliases ...]
loopback 127.0.0.0 # optional aliases
network-name: symbolic name of the netwkork
number: official number of the network in dotted quad
aliases: case sensitive optional space or tab separated list of other names
*/
#include <features.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <unistd.h>
#include "internal/parse_config.h"
#include <bits/uClibc_mutex.h>
__UCLIBC_MUTEX_STATIC(mylock, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP);
#define MINTOKENS 2
#define MAXALIASES 8
#define MAXTOKENS (MINTOKENS + MAXALIASES + 1)
#define BUFSZ (255) /* one line */
#define SBUFSIZE (BUFSZ + 1 + (sizeof(char *) * MAXTOKENS))
static parser_t *netp = NULL;
static struct netent nete;
static char *netbuf = NULL;
static smallint net_stayopen;
void setnetent(int stayopen)
{
__UCLIBC_MUTEX_LOCK(mylock);
if (netp)
config_close(netp);
netp = config_open(_PATH_NETWORKS);
if (stayopen)
net_stayopen = 1;
__UCLIBC_MUTEX_UNLOCK(mylock);
}
libc_hidden_def(setnetent)
void endnetent(void)
{
__UCLIBC_MUTEX_LOCK(mylock);
if (netp) {
config_close(netp);
netp = NULL;
}
net_stayopen = 0;
__UCLIBC_MUTEX_UNLOCK(mylock);
}
libc_hidden_def(endnetent)
int getnetent_r(struct netent *result_buf,
char *buf, size_t buflen, struct netent **result,
int *h_errnop
)
{
char **tok = NULL;
const size_t aliaslen = sizeof(char *) * MAXTOKENS;
int ret = ERANGE;
*result = NULL;
if (buflen < aliaslen
|| (buflen - aliaslen) < BUFSZ + 1)
goto DONE_NOUNLOCK;
__UCLIBC_MUTEX_LOCK(mylock);
ret = ENOENT;
if (netp == NULL)
setnetent(net_stayopen);
if (netp == NULL)
goto DONE;
netp->data = buf;
netp->data_len = aliaslen;
netp->line_len = buflen - aliaslen;
/* <name>[[:space:]]<netnumber>[[:space:]][<aliases>] */
if (!config_read(netp, &tok, MAXTOKENS-1, MINTOKENS, "# \t/", PARSE_NORMAL)) {
goto DONE;
}
result_buf->n_name = *(tok++);
{
struct addrinfo hints, *addri;
# define sa4_to_uint32(sa) \
(ntohl(((struct sockaddr_in*)sa)->sin_addr.s_addr))
#ifdef __UCLIBC_HAS_IPV6__
# define sa6_to_uint8(sa) \
(ntohl(((struct sockaddr_in6*)sa)->sin6_addr.s6_addr))
#endif
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_flags = AI_NUMERICHOST;
getaddrinfo(*(tok++), NULL, &hints, &addri);
result_buf->n_addrtype = addri->ai_family;
result_buf->n_net =
#if 0 /*FIXME: implement me! def __UCLIBC_HAS_IPV6__ */
addri->ai_family == AF_INET6 ? sa6_to_uint8(addri->ai_addr) :
#endif
sa4_to_uint32(addri->ai_addr);
freeaddrinfo(addri);
}
result_buf->n_aliases = tok;
*result = result_buf;
ret = 0;
DONE:
__UCLIBC_MUTEX_UNLOCK(mylock);
DONE_NOUNLOCK:
errno = ret;
return errno;
}
libc_hidden_def(getnetent_r)
static void __initbuf(void)
{
if (!netbuf) {
netbuf = malloc(SBUFSIZE);
if (!netbuf)
abort();
}
}
struct netent *getnetent(void)
{
struct netent *result;
int herrnop;
__initbuf();
getnetent_r(&nete, netbuf, SBUFSIZE, &result, &herrnop);
return result;
}
int getnetbyname_r(const char *name,
struct netent *result_buf, char *buf, size_t buflen,
struct netent **result,
int *h_errnop
)
{
register char **cp;
int ret, herrnop;
__UCLIBC_MUTEX_LOCK(mylock);
setnetent(net_stayopen);
while (!(ret = getnetent_r(result_buf, buf, buflen, result, &herrnop))) {
if (strcmp(name, result_buf->n_name) == 0)
break;
for (cp = result_buf->n_aliases; *cp; cp++)
if (strcmp(name, *cp) == 0)
goto gotname;
}
gotname:
if (!net_stayopen)
endnetent();
__UCLIBC_MUTEX_UNLOCK(mylock);
return *result ? 0 : ret;
}
libc_hidden_def(getnetbyname_r)
struct netent *getnetbyname(const char *name)
{
struct netent *result;
int herrnop;
__initbuf();
getnetbyname_r(name, &nete, netbuf, SBUFSIZE, &result, &herrnop);
return result;
}
int getnetbyaddr_r(uint32_t net, int type,
struct netent *result_buf, char *buf,
size_t buflen, struct netent **result,
int *h_errnop)
{
int ret, herrnop;
__UCLIBC_MUTEX_LOCK(mylock);
setnetent(net_stayopen);
while (!(ret = getnetent_r(result_buf, buf, buflen, result, &herrnop))) {
if (net == result_buf->n_net && type == result_buf->n_addrtype)
break;
}
if (!net_stayopen)
endnetent();
__UCLIBC_MUTEX_UNLOCK(mylock);
return *result ? 0 : ret;
}
libc_hidden_def(getnetbyaddr_r)
struct netent *getnetbyaddr(uint32_t net, int type)
{
struct netent *result;
int herrnop;
__initbuf();
getnetbyaddr_r(net, type, &nete, netbuf, SBUFSIZE, &result, &herrnop);
return result;
}
|
