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Annotation of src/usr.bin/talk/ctl.c, Revision 1.13

1.13    ! mestre      1: /*     $OpenBSD: ctl.c,v 1.12 2010/08/12 23:31:29 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: /*
                     34:  * This file handles haggling with the various talk daemons to
                     35:  * get a socket to talk to. sockt is opened and connected in
                     36:  * the progress
                     37:  */
                     38:
1.13    ! mestre     39: #include <sys/socket.h>
        !            40: #include <arpa/inet.h>
        !            41:
1.1       deraadt    42: #include "talk.h"
                     43:
                     44: struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
                     45: struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
                     46: struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
                     47:
                     48:        /* inet addresses of the two machines */
                     49: struct in_addr my_machine_addr;
                     50: struct in_addr his_machine_addr;
                     51:
                     52: u_short daemon_port;   /* port number of the talk daemon */
                     53:
                     54: int    ctl_sockt;
                     55: int    sockt;
1.12      tedu       56: int    invitation_waiting;
1.1       deraadt    57:
                     58: CTL_MSG msg;
                     59:
1.3       pjanzen    60: void
1.8       deraadt    61: open_sockt(void)
1.1       deraadt    62: {
1.9       tedu       63:        socklen_t length;
1.1       deraadt    64:
                     65:        my_addr.sin_addr = my_machine_addr;
                     66:        my_addr.sin_port = 0;
                     67:        sockt = socket(AF_INET, SOCK_STREAM, 0);
1.9       tedu       68:        if (sockt == -1)
1.5       millert    69:                quit("Bad socket", 1);
1.1       deraadt    70:        if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
1.5       millert    71:                quit("Binding local socket", 1);
1.1       deraadt    72:        length = sizeof(my_addr);
                     73:        if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
1.5       millert    74:                quit("Bad address for socket", 1);
1.1       deraadt    75: }
                     76:
                     77: /* open the ctl socket */
1.3       pjanzen    78: void
1.8       deraadt    79: open_ctl(void)
1.1       deraadt    80: {
1.9       tedu       81:        socklen_t length;
1.1       deraadt    82:
                     83:        ctl_addr.sin_port = 0;
                     84:        ctl_addr.sin_addr = my_machine_addr;
                     85:        ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
1.9       tedu       86:        if (ctl_sockt == -1)
1.5       millert    87:                quit("Bad socket", 1);
1.1       deraadt    88:        if (bind(ctl_sockt,
                     89:            (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
1.5       millert    90:                quit("Couldn't bind to control socket", 1);
1.1       deraadt    91:        length = sizeof(ctl_addr);
                     92:        if (getsockname(ctl_sockt,
                     93:            (struct sockaddr *)&ctl_addr, &length) == -1)
1.5       millert    94:                quit("Bad address for ctl socket", 1);
1.1       deraadt    95: }