source: rtems-libbsd/freebsd/lib/libc/net/getprotoname.c @ bceabc9

#include "port_before.h"

/*
 * 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);
}