libepistle/network.c

/*    This file is part of libepistle.
 *
 *    libepistle 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 3 of the License, or
 *    (at your option) any later version.
 *
 *    libepistle 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 libepistle.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <unistd.h>

#include "network.h"

int
network_server(uint16_t port, int backlog, Err *err)
{
	int reuseaddr = 1;
	struct sockaddr_in6 addr = { 0 };
	int sock = socket(AF_INET6, SOCK_STREAM, 0);

	if (sock < 0) {
		err_std(err);
		return -1;
	}

	addr.sin6_family = AF_INET6;
	addr.sin6_port = htons(port);
	addr.sin6_addr = in6addr_any;
	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
		   &reuseaddr, sizeof(reuseaddr));

	if (bind(sock, (struct sockaddr *) &addr, sizeof(addr)) < 0 ||
	    listen(sock, backlog < 0 ? SOMAXCONN : backlog) < 0) {
		err_std(err);
		close(sock);
		return -1;
	}

	return sock;
}

int
network_client(struct in6_addr in6_addr, uint16_t port, Err *err)
{
	struct sockaddr_in6 addr = { 0 };
	int sock = socket(AF_INET6, SOCK_STREAM, 0);

	if (sock < 0) {
		err_std(err);
		return -1;
	}

	addr.sin6_family = AF_INET6;
	addr.sin6_port = htons(port);
	addr.sin6_addr = in6_addr;

	if (connect(sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
	        err_std(err);
		close(sock);
		return -1;
	}

	return sock;
}