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/* Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <errno.h>
#include <rpc/rpc.h>
#include <sys/socket.h>
#include "common.h"
#include "pot.h"
static int svc_socket (u_long number, int type, int protocol, int port, int reuse)
{
struct sockaddr_in addr;
char rpcdata [1024], servdata [1024];
struct rpcent rpcbuf, *rpcp = NULL;
struct servent servbuf, *servp = NULL;
int sock, ret;
const char *proto = protocol == IPPROTO_TCP ? "tcp" : "udp";
if ((sock = socket (AF_INET, type, protocol)) < 0) {
errstr(_("Cannot create socket: %s\n"), strerror(errno));
return -1;
}
if (reuse) {
ret = 1;
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &ret, sizeof(ret)) < 0) {
errstr(_("Cannot set socket options: %s\n"), strerror(errno));
return -1;
}
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
if (!port) {
ret = getrpcbynumber_r(number, &rpcbuf, rpcdata, sizeof(rpcdata), &rpcp);
if (ret == 0 && rpcp != NULL) {
/* First try name */
ret = getservbyname_r(rpcp->r_name, proto, &servbuf, servdata,
sizeof servdata, &servp);
if ((ret != 0 || servp == NULL) && rpcp->r_aliases) {
const char **a;
/* Then we try aliases. */
for (a = (const char **) rpcp->r_aliases; *a != NULL; a++) {
ret = getservbyname_r(*a, proto, &servbuf, servdata,
sizeof servdata, &servp);
if (ret == 0 && servp != NULL)
break;
}
}
if (ret == 0 && servp != NULL)
port = servp->s_port;
}
}
else
port = htons(port);
if (port) {
addr.sin_port = port;
if (bind(sock, (struct sockaddr *) &addr, sizeof(struct sockaddr_in)) < 0) {
errstr(_("Cannot bind to given address: %s\n"), strerror(errno));
close (sock);
return -1;
}
}
else {
/* Service not found? */
close(sock);
return -1;
}
return sock;
}
/*
* Create and bind a TCP socket based on program number
*/
int svctcp_socket(u_long number, int port, int reuse)
{
return svc_socket(number, SOCK_STREAM, IPPROTO_TCP, port, reuse);
}
/*
* Create and bind a UDP socket based on program number
*/
int svcudp_socket(u_long number, int port, int reuse)
{
return svc_socket(number, SOCK_DGRAM, IPPROTO_UDP, port, reuse);
}
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