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mirror of https://git.FreeBSD.org/src.git synced 2024-12-05 09:14:03 +00:00
freebsd/lib/libc/net/getprotoname.c
Hajimu UMEMOTO c618a8562e When no protocol entry is found, getproto*_r(3) should
return zero.

Spotted by:	Kostik Belousov <kostikbel__at__gmail.com>
MFC after:	2 weeks
2010-10-05 15:40:59 +00:00

152 lines
4.2 KiB
C

/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getprotoname.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <errno.h>
#include <netdb.h>
#include <nsswitch.h>
#include <string.h>
#include "netdb_private.h"
#ifdef NS_CACHING
#include "nscache.h"
#endif
#include "nss_tls.h"
static const ns_src defaultsrc[] = {
{ NSSRC_FILES, NS_SUCCESS },
{ NULL, 0 }
};
#ifdef NS_CACHING
extern int __proto_id_func(char *, size_t *, va_list, void *);
extern int __proto_marshal_func(char *, size_t *, void *, va_list, void *);
extern int __proto_unmarshal_func(char *, size_t, void *, va_list, void *);
#endif
static int
files_getprotobyname(void *retval, void *mdata, va_list ap)
{
struct protoent pe;
struct protoent_data *ped;
char **cp;
int error;
char *name;
struct protoent *pptr;
char *buffer;
size_t buflen;
int *errnop;
name = va_arg(ap, char *);
pptr = va_arg(ap, struct protoent *);
buffer = va_arg(ap, char *);
buflen = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
if ((ped = __protoent_data_init()) == NULL) {
*errnop = errno;
return (NS_NOTFOUND);
}
__setprotoent_p(ped->stayopen, ped);
while ((error = __getprotoent_p(&pe, ped)) == 0) {
if (strcmp(pe.p_name, name) == 0)
break;
for (cp = pe.p_aliases; *cp != 0; cp++)
if (strcmp(*cp, name) == 0)
goto found;
}
found:
if (!ped->stayopen)
__endprotoent_p(ped);
if (error != 0) {
*errnop = errno;
return (NS_NOTFOUND);
}
if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) {
*errnop = errno;
return (NS_RETURN);
}
*((struct protoent **)retval) = pptr;
return (NS_SUCCESS);
}
int
getprotobyname_r(const char *name, struct protoent *pptr, char *buffer,
size_t buflen, struct protoent **result)
{
#ifdef NS_CACHING
static const nss_cache_info cache_info =
NS_COMMON_CACHE_INFO_INITIALIZER(
protocols, (void *)nss_lt_name,
__proto_id_func, __proto_marshal_func, __proto_unmarshal_func);
#endif
static const ns_dtab dtab[] = {
{ NSSRC_FILES, files_getprotobyname, NULL },
#ifdef NS_CACHING
NS_CACHE_CB(&cache_info)
#endif
{ NULL, NULL, NULL }
};
int rv, ret_errno;
ret_errno = 0;
*result = NULL;
rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobyname_r",
defaultsrc, name, pptr, buffer, buflen, &ret_errno);
if (rv != NS_SUCCESS) {
errno = ret_errno;
return (ret_errno);
}
return (0);
}
struct protoent *
getprotobyname(const char *name)
{
struct protodata *pd;
struct protoent *rval;
if ((pd = __protodata_init()) == NULL)
return (NULL);
if (getprotobyname_r(name, &pd->proto, pd->data, sizeof(pd->data),
&rval) != 0)
return (NULL);
return (rval);
}