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Annotation of src/usr.bin/talk/ctl.c, Revision 1.10

1.10    ! chl         1: /*     $OpenBSD: ctl.c,v 1.9 2004/03/02 21:04:42 tedu Exp $    */
1.1       deraadt     2: /*     $NetBSD: ctl.c,v 1.3 1994/12/09 02:14:10 jtc Exp $      */
                      3:
                      4: /*
                      5:  * Copyright (c) 1983, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
1.7       millert    16:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  */
                     32:
                     33: #ifndef lint
                     34: #if 0
                     35: static char sccsid[] = "@(#)ctl.c      8.1 (Berkeley) 6/6/93";
                     36: #endif
1.10    ! chl        37: static const char rcsid[] = "$OpenBSD: ctl.c,v 1.9 2004/03/02 21:04:42 tedu Exp $";
1.1       deraadt    38: #endif /* not lint */
                     39:
                     40: /*
                     41:  * This file handles haggling with the various talk daemons to
                     42:  * get a socket to talk to. sockt is opened and connected in
                     43:  * the progress
                     44:  */
                     45:
                     46: #include "talk.h"
1.3       pjanzen    47: #include <arpa/inet.h>
1.1       deraadt    48: #include "talk_ctl.h"
                     49:
                     50: struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
                     51: struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
                     52: struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
                     53:
                     54:        /* inet addresses of the two machines */
                     55: struct in_addr my_machine_addr;
                     56: struct in_addr his_machine_addr;
                     57:
                     58: u_short daemon_port;   /* port number of the talk daemon */
                     59:
                     60: int    ctl_sockt;
                     61: int    sockt;
                     62: int    invitation_waiting = 0;
                     63:
                     64: CTL_MSG msg;
                     65:
1.3       pjanzen    66: void
1.8       deraadt    67: open_sockt(void)
1.1       deraadt    68: {
1.9       tedu       69:        socklen_t length;
1.1       deraadt    70:
                     71:        my_addr.sin_addr = my_machine_addr;
                     72:        my_addr.sin_port = 0;
                     73:        sockt = socket(AF_INET, SOCK_STREAM, 0);
1.9       tedu       74:        if (sockt == -1)
1.5       millert    75:                quit("Bad socket", 1);
1.1       deraadt    76:        if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
1.5       millert    77:                quit("Binding local socket", 1);
1.1       deraadt    78:        length = sizeof(my_addr);
                     79:        if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
1.5       millert    80:                quit("Bad address for socket", 1);
1.1       deraadt    81: }
                     82:
                     83: /* open the ctl socket */
1.3       pjanzen    84: void
1.8       deraadt    85: open_ctl(void)
1.1       deraadt    86: {
1.9       tedu       87:        socklen_t length;
1.1       deraadt    88:
                     89:        ctl_addr.sin_port = 0;
                     90:        ctl_addr.sin_addr = my_machine_addr;
                     91:        ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
1.9       tedu       92:        if (ctl_sockt == -1)
1.5       millert    93:                quit("Bad socket", 1);
1.1       deraadt    94:        if (bind(ctl_sockt,
                     95:            (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
1.5       millert    96:                quit("Couldn't bind to control socket", 1);
1.1       deraadt    97:        length = sizeof(ctl_addr);
                     98:        if (getsockname(ctl_sockt,
                     99:            (struct sockaddr *)&ctl_addr, &length) == -1)
1.5       millert   100:                quit("Bad address for ctl socket", 1);
1.1       deraadt   101: }