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/* 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/protocols
# protocol-name number [aliases ...]
ip 0 IP # internet protocol, pseudo protocol number
protocol-name: case sensitive friendly name of the IP protocol
number: decimal protocol number
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 /* will probably never be more than one */
#define MAXTOKENS (MINTOKENS + MAXALIASES + 1)
#define BUFSZ (255) /* one line */
#define SBUFSIZE (BUFSZ + 1 + (sizeof(char *) * MAXTOKENS))
static parser_t *protop = NULL;
static struct protoent protoe;
static char *protobuf = NULL;
static smallint proto_stayopen;
void setprotoent(int stayopen)
{
__UCLIBC_MUTEX_LOCK(mylock);
if (protop)
config_close(protop);
protop = config_open(_PATH_PROTOCOLS);
if (stayopen)
proto_stayopen = 1;
__UCLIBC_MUTEX_UNLOCK(mylock);
}
libc_hidden_def(setprotoent)
void endprotoent(void)
{
__UCLIBC_MUTEX_LOCK(mylock);
if (protop) {
config_close(protop);
protop = NULL;
}
proto_stayopen = 0;
__UCLIBC_MUTEX_UNLOCK(mylock);
}
libc_hidden_def(endprotoent)
int getprotoent_r(struct protoent *result_buf,
char *buf, size_t buflen, struct protoent **result)
{
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);
//tok = (char **) buf;
ret = ENOENT;
if (protop == NULL)
setprotoent(proto_stayopen);
if (protop == NULL)
goto DONE;
protop->data = buf;
protop->data_len = aliaslen;
protop->line_len = buflen - aliaslen;
/* <name>[[:space:]]<protonumber>[[:space:]][<aliases>] */
if (!config_read(protop, &tok, MAXTOKENS - 1, MINTOKENS, "# \t/", PARSE_NORMAL)) {
goto DONE;
}
result_buf->p_name = *(tok++);
result_buf->p_proto = atoi(*(tok++));
result_buf->p_aliases = tok;
*result = result_buf;
ret = 0;
DONE:
__UCLIBC_MUTEX_UNLOCK(mylock);
DONE_NOUNLOCK:
errno = ret;
return errno;
}
libc_hidden_def(getprotoent_r)
static void __initbuf(void)
{
if (!protobuf) {
protobuf = malloc(SBUFSIZE);
if (!protobuf)
abort();
}
}
struct protoent *getprotoent(void)
{
struct protoent *result;
__initbuf();
getprotoent_r(&protoe, protobuf, SBUFSIZE, &result);
return result;
}
int getprotobyname_r(const char *name,
struct protoent *result_buf, char *buf, size_t buflen,
struct protoent **result)
{
register char **cp;
int ret;
__UCLIBC_MUTEX_LOCK(mylock);
setprotoent(proto_stayopen);
while (!(ret = getprotoent_r(result_buf, buf, buflen, result))) {
if (strcmp(name, result_buf->p_name) == 0)
break;
for (cp = result_buf->p_aliases; *cp; cp++)
if (strcmp(name, *cp) == 0)
goto gotname;
}
gotname:
if (!proto_stayopen)
endprotoent();
__UCLIBC_MUTEX_UNLOCK(mylock);
return *result ? 0 : ret;
}
libc_hidden_def(getprotobyname_r)
struct protoent *getprotobyname(const char *name)
{
struct protoent *result;
__initbuf();
getprotobyname_r(name, &protoe, protobuf, SBUFSIZE, &result);
return result;
}
int getprotobynumber_r(int proto,
struct protoent *result_buf, char *buf,
size_t buflen, struct protoent **result)
{
int ret;
__UCLIBC_MUTEX_LOCK(mylock);
setprotoent(proto_stayopen);
while (!(ret = getprotoent_r(result_buf, buf, buflen, result))) {
if (proto == result_buf->p_proto)
break;
}
if (!proto_stayopen)
endprotoent();
__UCLIBC_MUTEX_UNLOCK(mylock);
return *result ? 0 : ret;
}
libc_hidden_def(getprotobynumber_r)
struct protoent *getprotobynumber(int proto)
{
struct protoent *result;
__initbuf();
getprotobynumber_r(proto, &protoe, protobuf, SBUFSIZE, &result);
return result;
}
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