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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 get_service_port(u_long number, const char *proto)
{
char servdata [1024];
struct rpcent *rpcp = NULL;
struct servent servbuf, *servp = NULL;
int ret;
rpcp = getrpcbynumber(number);
if (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)
return ntohs(servp->s_port);
}
return 0;
}
static struct addrinfo *svc_create_bindaddr(struct netconfig *nconf, int port)
{
struct addrinfo *ai = NULL;
struct addrinfo hint = {
.ai_flags = AI_PASSIVE | AI_NUMERICSERV,
};
char portbuf[16];
int err;
if (!strcmp(nconf->nc_protofmly, NC_INET))
hint.ai_family = AF_INET;
else if (!strcmp(nconf->nc_protofmly, NC_INET6))
hint.ai_family = AF_INET6;
else {
errstr(_("Unrecognized bind address family: %s\n"),
nconf->nc_protofmly);
return NULL;
}
if (!strcmp(nconf->nc_proto, NC_UDP))
hint.ai_protocol = IPPROTO_UDP;
else if (!strcmp(nconf->nc_proto, NC_TCP))
hint.ai_protocol = IPPROTO_TCP;
else {
errstr(_("Unrecognized bind address protocol: %s\n"),
nconf->nc_proto);
return NULL;
}
if (nconf->nc_semantics == NC_TPI_CLTS)
hint.ai_socktype = SOCK_DGRAM;
else if (nconf->nc_semantics == NC_TPI_COTS_ORD)
hint.ai_socktype = SOCK_STREAM;
else {
errstr(_("Unrecognized address semantics: %lu\n"),
nconf->nc_semantics);
return NULL;
}
snprintf(portbuf, sizeof(portbuf), "%u", port);
err = getaddrinfo(NULL, portbuf, &hint, &ai);
if (err) {
errstr(_("Failed to construct bind address: %s\n"),
gai_strerror(err));
return NULL;
}
return ai;
}
static int svc_create_sock(struct addrinfo *ai)
{
int fd;
int optval = 1;
fd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if (fd < 0) {
errstr(_("Error creating socket: %s\n"), strerror(errno));
return -1;
}
if (ai->ai_family == AF_INET6) {
if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY,
&optval, sizeof(optval)) < 0) {
errstr(_("Cannot set IPv6 socket options: %s\n"), strerror(errno));
close(fd);
return -1;
}
}
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)) < 0) {
errstr(_("Cannot set socket options: %s\n"), strerror(errno));
close(fd);
return -1;
}
if (bind(fd, ai->ai_addr, ai->ai_addrlen) < 0) {
errstr(_("Cannot bind to address: %s\n"), strerror(errno));
close(fd);
return -1;
}
if (ai->ai_protocol == IPPROTO_TCP) {
if (listen(fd, SOMAXCONN) < 0) {
errstr(_("Cannot listen to address: %s\n"), strerror(errno));
close(fd);
return -1;
}
}
return fd;
}
/*
* Create service structure based on passed netconfig and port
*/
SVCXPRT *svc_create_nconf(rpcprog_t program, struct netconfig *nconf, int port)
{
SVCXPRT *xprt;
if (!port)
port = get_service_port(program, nconf->nc_proto);
if (port) {
struct addrinfo *ai = svc_create_bindaddr(nconf, port);
int fd;
if (!ai)
return NULL;
fd = svc_create_sock(ai);
freeaddrinfo(ai);
if (fd < 0)
return NULL;
xprt = svc_tli_create(fd, nconf, NULL, 0, 0);
if (!xprt) {
close(fd);
return NULL;
}
} else {
xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
}
return xprt;
}
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