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/*
* 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;
(void)h_errnop;
*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;
(void)h_errnop;
__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;
(void)h_errnop;
__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;
}
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