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Annotation of 43BSDReno/usr.bin/talk/ctl.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)ctl.c      5.6 (Berkeley) 6/1/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: /*
        !            25:  * This file handles haggling with the various talk daemons to
        !            26:  * get a socket to talk to. sockt is opened and connected in
        !            27:  * the progress
        !            28:  */
        !            29: 
        !            30: #include "talk_ctl.h"
        !            31: 
        !            32: struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
        !            33: struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
        !            34: struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
        !            35: 
        !            36:        /* inet addresses of the two machines */
        !            37: struct in_addr my_machine_addr;
        !            38: struct in_addr his_machine_addr;
        !            39: 
        !            40: u_short daemon_port;   /* port number of the talk daemon */
        !            41: 
        !            42: int    ctl_sockt;
        !            43: int    sockt;
        !            44: int    invitation_waiting = 0;
        !            45: 
        !            46: CTL_MSG msg;
        !            47: 
        !            48: open_sockt()
        !            49: {
        !            50:        int length;
        !            51: 
        !            52:        my_addr.sin_addr = my_machine_addr;
        !            53:        my_addr.sin_port = 0;
        !            54:        sockt = socket(AF_INET, SOCK_STREAM, 0);
        !            55:        if (sockt <= 0)
        !            56:                p_error("Bad socket");
        !            57:        if (bind(sockt, &my_addr, sizeof(my_addr)) != 0)
        !            58:                p_error("Binding local socket");
        !            59:        length = sizeof(my_addr);
        !            60:        if (getsockname(sockt, &my_addr, &length) == -1)
        !            61:                p_error("Bad address for socket");
        !            62: }
        !            63: 
        !            64: /* open the ctl socket */
        !            65: open_ctl() 
        !            66: {
        !            67:        int length;
        !            68: 
        !            69:        ctl_addr.sin_port = 0;
        !            70:        ctl_addr.sin_addr = my_machine_addr;
        !            71:        ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
        !            72:        if (ctl_sockt <= 0)
        !            73:                p_error("Bad socket");
        !            74:        if (bind(ctl_sockt, &ctl_addr, sizeof(ctl_addr), 0) != 0)
        !            75:                p_error("Couldn't bind to control socket");
        !            76:        length = sizeof(ctl_addr);
        !            77:        if (getsockname(ctl_sockt, &ctl_addr, &length) == -1)
        !            78:                p_error("Bad address for ctl socket");
        !            79: }
        !            80: 
        !            81: /* print_addr is a debug print routine */
        !            82: print_addr(addr)
        !            83:        struct sockaddr_in addr;
        !            84: {
        !            85:        int i;
        !            86: 
        !            87:        printf("addr = %x, port = %o, family = %o zero = ",
        !            88:                addr.sin_addr, addr.sin_port, addr.sin_family);
        !            89:        for (i = 0; i<8;i++)
        !            90:        printf("%o ", (int)addr.sin_zero[i]);
        !            91:        putchar('\n');
        !            92: }

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