| 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, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | static char sccsid[] = "@(#)ctl.c 5.7 (Berkeley) 3/1/91"; |
| 36 | #endif /* not lint */ |
| 37 | |
| 38 | /* |
| 39 | * This file handles haggling with the various talk daemons to |
| 40 | * get a socket to talk to. sockt is opened and connected in |
| 41 | * the progress |
| 42 | */ |
| 43 | |
| 44 | #include <sys/types.h> |
| 45 | #include <sys/socket.h> |
| 46 | #include <protocols/talkd.h> |
| 47 | #include <netinet/in.h> |
| 48 | #include "talk.h" |
| 49 | #include "talk_ctl.h" |
| 50 | |
| 51 | struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET }; |
| 52 | struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET }; |
| 53 | struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET }; |
| 54 | |
| 55 | /* inet addresses of the two machines */ |
| 56 | struct in_addr my_machine_addr; |
| 57 | struct in_addr his_machine_addr; |
| 58 | |
| 59 | u_short daemon_port; /* port number of the talk daemon */ |
| 60 | |
| 61 | int ctl_sockt; |
| 62 | int sockt; |
| 63 | int invitation_waiting = 0; |
| 64 | |
| 65 | CTL_MSG msg; |
| 66 | |
| 67 | open_sockt() |
| 68 | { |
| 69 | int length; |
| 70 | |
| 71 | my_addr.sin_addr = my_machine_addr; |
| 72 | my_addr.sin_port = 0; |
| 73 | sockt = socket(AF_INET, SOCK_STREAM, 0); |
| 74 | if (sockt <= 0) |
| 75 | p_error("Bad socket"); |
| 76 | if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0) |
| 77 | p_error("Binding local socket"); |
| 78 | length = sizeof(my_addr); |
| 79 | if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1) |
| 80 | p_error("Bad address for socket"); |
| 81 | } |
| 82 | |
| 83 | /* open the ctl socket */ |
| 84 | open_ctl() |
| 85 | { |
| 86 | int length; |
| 87 | |
| 88 | ctl_addr.sin_port = 0; |
| 89 | ctl_addr.sin_addr = my_machine_addr; |
| 90 | ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0); |
| 91 | if (ctl_sockt <= 0) |
| 92 | p_error("Bad socket"); |
| 93 | if (bind(ctl_sockt, |
| 94 | (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0) |
| 95 | p_error("Couldn't bind to control socket"); |
| 96 | length = sizeof(ctl_addr); |
| 97 | if (getsockname(ctl_sockt, |
| 98 | (struct sockaddr *)&ctl_addr, &length) == -1) |
| 99 | p_error("Bad address for ctl socket"); |
| 100 | } |
| 101 | |
| 102 | /* print_addr is a debug print routine */ |
| 103 | print_addr(addr) |
| 104 | struct sockaddr_in addr; |
| 105 | { |
| 106 | int i; |
| 107 | |
| 108 | printf("addr = %x, port = %o, family = %o zero = ", |
| 109 | addr.sin_addr, addr.sin_port, addr.sin_family); |
| 110 | for (i = 0; i<8;i++) |
| 111 | printf("%o ", (int)addr.sin_zero[i]); |
| 112 | putchar('\n'); |
| 113 | } |