/*
 * Copyright (c) 2002, 2004, 2005 Sendmail, Inc. and its suppliers.
 *	All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 */

#include "sm/generic.h"
SM_RCSID("@(#)$Id: netsocklisten.c,v 1.5 2005/01/18 00:07:58 ca Exp $")
#include "sm/assert.h"
#include "sm/error.h"
#include "sm/memops.h"
#include "sm/fcntl.h"
#include "sm/net.h"

/*
**  NET_SERVER_LISTEN_ADDR -- Create a socket, bind, and listen.
**
**	Parameters:
**		addr -- address to bind to.
**		addrlen -- len of address to bind to.
**		backlog -- Backlog of connections to accept (man listen(2))
**
**	Returns:
**		New socket fd or -1 on error.
*/

int
net_server_listen_addr(sockaddr_T *addr, int addrlen, int backlog)
{
	int listenfd;
	int sockopt;

	SM_ASSERT(addr != NULL);
	SM_ASSERT(backlog > 0);

	sockopt = 1;
	listenfd = socket(AF_INET, SOCK_STREAM, 0);
	if (listenfd == INVALID_SOCKET)
		return sm_error_perm(SM_EM_NET, errno);
	if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, (void *) &sockopt,
		       sizeof(sockopt)) == -1)
	{
		closesocket(listenfd);
		return sm_error_perm(SM_EM_NET, errno);
	}
	if (bind(listenfd, (struct sockaddr *) addr, addrlen) == -1)
	{
		closesocket(listenfd);
		return sm_error_perm(SM_EM_NET, errno);
	}
	if (listen(listenfd, backlog) == -1)
	{
		closesocket(listenfd);
		return sm_error_perm(SM_EM_NET, errno);
	}
	return listenfd;
}

/*
**  NET_SERVER_LISTEN -- Create a socket, bind, and listen.
**
**	Parameters:
**		ip -- IPv4 address to bind to.
**		port -- Port to bind to.
**		backlog -- Backlog of connections to accept (listen(2))
**
**	Returns:
**		New socket fd or -1 on error.
*/

sm_ret_T
net_server_listen(const char *ip, int port, int backlog)
{
	struct sockaddr_in servaddr;
	ulong hostaddr;

	SM_ASSERT(port > 0);

	sm_memset(&servaddr, 0, sizeof(servaddr));
	servaddr.sin_family = AF_INET;
	if ((hostaddr = inet_addr(ip)) == INADDR_NONE)
		return sm_error_perm(SM_EM_NET, errno);
	sm_memcpy(&servaddr.sin_addr, &hostaddr, sizeof(hostaddr));
	servaddr.sin_port = htons(port);
	return net_server_listen_addr((sockaddr_T *)&servaddr,
				sizeof(servaddr), backlog);
}