1 /* 2 * Copyright (c) 1983, 1988 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 the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 char copyright[] = 20 "@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\ 21 All rights reserved.\n"; 22 #endif /* not lint */ 23 24 #ifndef lint 25 static char sccsid[] = "@(#)implogd.c 5.6 (Berkeley) 06/18/88"; 26 #endif /* not lint */ 27 28 #include <sgtty.h> 29 30 #include <sys/time.h> 31 #include <sys/param.h> 32 #include <sys/socket.h> 33 #include <sys/syslog.h> 34 #include <sys/file.h> 35 36 #include <net/if.h> 37 38 #include <netinet/in.h> 39 #include <netimp/if_imp.h> 40 41 #define LOGFILE "/usr/adm/implog" 42 43 u_char request[1024]; 44 int marktime(); 45 int options; 46 extern int errno; 47 int log; 48 49 /* 50 * Socket address, internet style, with 51 * unused space taken by timestamp and packet 52 * size. 53 */ 54 struct sockstamp { 55 short sin_family; 56 u_short sin_port; 57 struct in_addr sin_addr; 58 time_t sin_time; 59 int sin_len; 60 }; 61 62 main(argc, argv) 63 char *argv[]; 64 { 65 int i, s; 66 time_t t; 67 struct sockstamp from; 68 69 argc--, argv++; 70 openlog("implogd", LOG_PID | LOG_ODELAY, LOG_DAEMON); 71 if (argc > 0 && !strcmp(argv[0], "-d")) 72 options |= SO_DEBUG; 73 log = open(LOGFILE, O_CREAT|O_WRONLY|O_APPEND, 0644); 74 if (log < 0) { 75 syslog(LOG_ERR, "%s: %m\n", LOGFILE); 76 perror("implogd: open"); 77 exit(1); 78 } 79 from.sin_time = time(0); 80 from.sin_len = sizeof (time_t); 81 write(log, (char *)&from, sizeof (from)); 82 if ((s = socket(AF_IMPLINK, SOCK_RAW, 0)) < 0) { 83 syslog(LOG_ERR, "socket: %m\n"); 84 perror("implogd: socket"); 85 exit(5); 86 } 87 #ifndef DEBUG 88 if (fork()) 89 exit(0); 90 for (i = 0; i < 10; i++) 91 if (i != log && i != s) 92 (void) close(i); 93 (void) open("/", 0); 94 (void) dup2(0, 1); 95 (void) dup2(0, 2); 96 { int tt = open("/dev/tty", 2); 97 if (tt > 0) { 98 ioctl(tt, TIOCNOTTY, 0); 99 close(tt); 100 } 101 } 102 #endif 103 for (;;) { 104 int fromlen = sizeof (from), len; 105 106 len = recvfrom(s, request, sizeof (request), 0, 107 &from, &fromlen); 108 if (len < 0) { 109 syslog(LOG_ERR, "recvfrom: %m\n"); 110 perror("implogd: recvfrom"); 111 continue; 112 } 113 if (len == 0 || len > IMPMTU) /* sanity */ 114 continue; 115 from.sin_len = len; 116 from.sin_time = time(0); 117 write(log, (char *)&from, sizeof (from)); 118 write(log, request, len); 119 } 120 /*NOTREACHED*/ 121 } 122