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Annotation of src/usr.bin/talk/ctl.c, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: ctl.c,v 1.3 1994/12/09 02:14:10 jtc Exp $      */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1983, 1993
        !             5:  *     The Regents of the University of California.  All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. All advertising materials mentioning features or use of this software
        !            16:  *    must display the following acknowledgement:
        !            17:  *     This product includes software developed by the University of
        !            18:  *     California, Berkeley and its contributors.
        !            19:  * 4. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  */
        !            35:
        !            36: #ifndef lint
        !            37: #if 0
        !            38: static char sccsid[] = "@(#)ctl.c      8.1 (Berkeley) 6/6/93";
        !            39: #endif
        !            40: static char rcsid[] = "$NetBSD: ctl.c,v 1.3 1994/12/09 02:14:10 jtc Exp $";
        !            41: #endif /* not lint */
        !            42:
        !            43: /*
        !            44:  * This file handles haggling with the various talk daemons to
        !            45:  * get a socket to talk to. sockt is opened and connected in
        !            46:  * the progress
        !            47:  */
        !            48:
        !            49: #include <sys/types.h>
        !            50: #include <sys/socket.h>
        !            51: #include <protocols/talkd.h>
        !            52: #include <netinet/in.h>
        !            53: #include "talk.h"
        !            54: #include "talk_ctl.h"
        !            55:
        !            56: struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
        !            57: struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
        !            58: struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
        !            59:
        !            60:        /* inet addresses of the two machines */
        !            61: struct in_addr my_machine_addr;
        !            62: struct in_addr his_machine_addr;
        !            63:
        !            64: u_short daemon_port;   /* port number of the talk daemon */
        !            65:
        !            66: int    ctl_sockt;
        !            67: int    sockt;
        !            68: int    invitation_waiting = 0;
        !            69:
        !            70: CTL_MSG msg;
        !            71:
        !            72: open_sockt()
        !            73: {
        !            74:        int length;
        !            75:
        !            76:        my_addr.sin_addr = my_machine_addr;
        !            77:        my_addr.sin_port = 0;
        !            78:        sockt = socket(AF_INET, SOCK_STREAM, 0);
        !            79:        if (sockt <= 0)
        !            80:                p_error("Bad socket");
        !            81:        if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
        !            82:                p_error("Binding local socket");
        !            83:        length = sizeof(my_addr);
        !            84:        if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
        !            85:                p_error("Bad address for socket");
        !            86: }
        !            87:
        !            88: /* open the ctl socket */
        !            89: open_ctl()
        !            90: {
        !            91:        int length;
        !            92:
        !            93:        ctl_addr.sin_port = 0;
        !            94:        ctl_addr.sin_addr = my_machine_addr;
        !            95:        ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
        !            96:        if (ctl_sockt <= 0)
        !            97:                p_error("Bad socket");
        !            98:        if (bind(ctl_sockt,
        !            99:            (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
        !           100:                p_error("Couldn't bind to control socket");
        !           101:        length = sizeof(ctl_addr);
        !           102:        if (getsockname(ctl_sockt,
        !           103:            (struct sockaddr *)&ctl_addr, &length) == -1)
        !           104:                p_error("Bad address for ctl socket");
        !           105: }
        !           106:
        !           107: /* print_addr is a debug print routine */
        !           108: print_addr(addr)
        !           109:        struct sockaddr_in addr;
        !           110: {
        !           111:        int i;
        !           112:
        !           113:        printf("addr = %x, port = %o, family = %o zero = ",
        !           114:                addr.sin_addr, addr.sin_port, addr.sin_family);
        !           115:        for (i = 0; i<8;i++)
        !           116:        printf("%o ", (int)addr.sin_zero[i]);
        !           117:        putchar('\n');
        !           118: }