1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)ctl.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 /* 13 * This file handles haggling with the various talk daemons to 14 * get a socket to talk to. sockt is opened and connected in 15 * the progress 16 */ 17 18 #include <sys/types.h> 19 #include <sys/socket.h> 20 #include <protocols/talkd.h> 21 #include <netinet/in.h> 22 #include "talk.h" 23 #include "talk_ctl.h" 24 25 struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET }; 26 struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET }; 27 struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET }; 28 29 /* inet addresses of the two machines */ 30 struct in_addr my_machine_addr; 31 struct in_addr his_machine_addr; 32 33 u_short daemon_port; /* port number of the talk daemon */ 34 35 int ctl_sockt; 36 int sockt; 37 int invitation_waiting = 0; 38 39 CTL_MSG msg; 40 41 open_sockt() 42 { 43 int length; 44 45 my_addr.sin_addr = my_machine_addr; 46 my_addr.sin_port = 0; 47 sockt = socket(AF_INET, SOCK_STREAM, 0); 48 if (sockt <= 0) 49 p_error("Bad socket"); 50 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0) 51 p_error("Binding local socket"); 52 length = sizeof(my_addr); 53 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1) 54 p_error("Bad address for socket"); 55 } 56 57 /* open the ctl socket */ 58 open_ctl() 59 { 60 int length; 61 62 ctl_addr.sin_port = 0; 63 ctl_addr.sin_addr = my_machine_addr; 64 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0); 65 if (ctl_sockt <= 0) 66 p_error("Bad socket"); 67 if (bind(ctl_sockt, 68 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0) 69 p_error("Couldn't bind to control socket"); 70 length = sizeof(ctl_addr); 71 if (getsockname(ctl_sockt, 72 (struct sockaddr *)&ctl_addr, &length) == -1) 73 p_error("Bad address for ctl socket"); 74 } 75 76 /* print_addr is a debug print routine */ 77 print_addr(addr) 78 struct sockaddr_in addr; 79 { 80 int i; 81 82 printf("addr = %x, port = %o, family = %o zero = ", 83 addr.sin_addr, addr.sin_port, addr.sin_family); 84 for (i = 0; i<8;i++) 85 printf("%o ", (int)addr.sin_zero[i]); 86 putchar('\n'); 87 } 88