/*

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program 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 General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 *

 * Copyrights

 *

 * Portions created by or assigned to Jabber.com, Inc. are

 * Copyright (c) 1999-2002 Jabber.com, Inc.  All Rights Reserved.  Contact

 * information for Jabber.com, Inc. is available at http://www.jabber.com/.

 *

 * Portions Copyright (c) 1998-1999 Jeremie Miller.

 *

 * Acknowledgements

 *

 * Special thanks to the Jabber Open Source Contributors for their

 * suggestions and support of Jabber.

 *

 */

/**

 * @file socket.c

 * @brief some misc functions to handle sockets

 */

#include "libxode.h"

#include "connwrap.h"

/**

 * Simple wrapper to make socket creation easy.

 *

 * @param port port number of the socket

 * @param host hostname where to connect to or listen on

 * @param type type of socket (NETSOCKET_SERVER, NETSOCKET_CLIENT; or NETSOCKET_UDP)

 * @return file handle of the new socket

 *

 * NETSOCKET_SERVER is local listening socket

 * NETSOCKET_CLIENT is connection socket

 */

int make_netsocket(u_short port, char *host, int type, int ssl)

{

    int s, flag = 1;

    struct sockaddr_in sa;

    struct in_addr *saddr;

    int socket_type;

    /* is this a UDP socket or a TCP socket? */

    socket_type = (type == NETSOCKET_UDP)?SOCK_DGRAM:SOCK_STREAM;

    bzero((void *)&sa,sizeof(struct sockaddr_in));

    if((s = socket(AF_INET,socket_type,0)) < 0)

        return(-1);

    if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&flag, sizeof(flag)) < 0)

        return(-1);

    saddr = make_addr(host);

    if(saddr == NULL)

        return(-1);

    sa.sin_family = AF_INET;

    sa.sin_port = htons(port);

    if(type == NETSOCKET_SERVER)

    {

        /* bind to specific address if specified */

        if(host != NULL)

            sa.sin_addr.s_addr = saddr->s_addr;

        if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)

        {

            close(s);

            return(-1);

        }

    }

    if(type == NETSOCKET_CLIENT)

    {

        sa.sin_addr.s_addr = saddr->s_addr;

        if(cw_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl) < 0)

        {

            close(s);

            return(-1);

        }

    }

    if(type == NETSOCKET_UDP)

    {

        /* bind to all addresses for now */

        if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)

        {

            close(s);

            return(-1);

        }

        /* specify default recipient for read/write */

        sa.sin_addr.s_addr = saddr->s_addr;

        if(cw_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl) < 0)

        {

            close(s);

            return(-1);

        }

    }

    return(s);

}

void change_socket_to_blocking(int s)

     /* make socket blocking */

{

    int val;

    val = fcntl(s, F_GETFL, 0);

    fcntl(s, F_SETFL, val & (~O_NONBLOCK));

}

void change_socket_to_nonblocking(int s)

     /* make socket non-blocking */

{

    int val;

    val = fcntl(s, F_GETFL, 0);

    fcntl(s, F_SETFL, val | O_NONBLOCK);

}

/* socket.c

 *

 * Simple wrapper to make non-blocking client socket creation easy.

 * type = NETSOCKET_SERVER is local listening socket

 * type = NETSOCKET_CLIENT is connection socket

 * type = NETSOCKET_UDP

 */

int make_nb_netsocket(u_short port, char *host, int type, int ssl, int* state)

{

    int s, flag = 1;

    struct sockaddr_in sa;

    struct in_addr *saddr;

    int socket_type;

    /* is this a UDP socket or a TCP socket? */

    socket_type = (type == NETSOCKET_UDP)?SOCK_DGRAM:SOCK_STREAM;

    bzero((void *)&sa,sizeof(struct sockaddr_in));

    if((s = socket(AF_INET,socket_type,0)) < 0)

        return(-1);

    if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&flag, sizeof(flag)) < 0)

        return(-1);

    change_socket_to_nonblocking(s);

    saddr = make_addr(host);

    if(saddr == NULL)

        return(-1);

    sa.sin_family = AF_INET;

    sa.sin_port = htons(port);

    if(type == NETSOCKET_SERVER)

    {

        /* bind to specific address if specified */

        if(host != NULL)

            sa.sin_addr.s_addr = saddr->s_addr;

        if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)

        {

            close(s);

            return(-1);

        }

    }

    if(type == NETSOCKET_CLIENT)

    {

        int rc;

        sa.sin_addr.s_addr = saddr->s_addr;

        rc = cw_nb_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl, state);

        if (rc == -1 )

        {

            close(s);

            return(-1);

        }

    }

    if(type == NETSOCKET_UDP)

    {

        /* bind to all addresses for now */

        if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)

        {

            close(s);

            return(-1);

        }

        /* specify default recipient for read/write */

        sa.sin_addr.s_addr = saddr->s_addr;

        if(cw_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl) < 0)

        {

            close(s);

            return(-1);

        }

    }

    return(s);

}

struct in_addr *make_addr(char *host)

{

    struct hostent *hp;

    static struct in_addr addr;

    char myname[MAXHOSTNAMELEN + 1];

    if (host == NULL || strlen(host) == 0) {

        gethostname(myname,MAXHOSTNAMELEN);

        hp = gethostbyname(myname);

        if(hp != NULL) {

            return (struct in_addr *) *hp->h_addr_list;

        }

    } else {

        addr.s_addr = inet_addr(host);

        if(addr.s_addr != (in_addr_t)-1) {

            return &addr;

        }

        hp = gethostbyname(host);

        if(hp != NULL) {

            return (struct in_addr *) *hp->h_addr_list;

        }

    }

    return NULL;

}

/**

 * Sets a file descriptor to close on exec.

 *

 * @param fd the file descriptor

 * @param flag 1 to close on exec, 0 to leave open across exec

 *

 * @deprecated this function is not used by jabberd14 and might be removed in future versions

 */

int set_fd_close_on_exec(int fd, int flag)

{

    int oldflags = fcntl(fd,F_GETFL);

    int newflags;

    if(flag)

        newflags = oldflags | FD_CLOEXEC;

    else

        newflags = oldflags & (~FD_CLOEXEC);

    if(newflags==oldflags)

        return 0;

    return fcntl(fd,F_SETFL,(long)newflags);

}