/* DYN -- a simple DYNdns client for the Monolith Coalition Written by Jon Klippenstein Copyright (C) 1997 Jon Klippenstein Network code based in part on fetchwww.c 1.0 by Artur Skawina The dyn.ml.org domain is hardcoded in, this will have to be changed if the dynamic domain changes. OS'es tested on: Linux 2.0.27 i386 (my 386DX/40 infinity.dyn.ml.org/dparrot.bohica.net (UUCP)) SunOS 5.5 sparc (my ISP: nephi.ocii.com) FreeBSD Version: 1.0.4 $Header: /root/Projects/dyn-1.0.4/RCS/dyn.c,v 1.5 1997/05/22 00:36:28 root Exp $ $Log: dyn.c,v $ Revision 1.5 1997/05/22 00:36:28 root Added a few things, like commandline hiding, and support for expire-time and expire-date, and tagline. generally cleaned up the source a bit. Revision 1.4 1997/02/01 20:36:46 root added sysname,machine check with uname added syslog stuff added sleep 5 bit to readme Revision 1.3 1997/01/31 23:52:42 root Added major funtionality Added usage message Added magic token checking Added whole pile 'o crap :) Revision 1.2 1997/01/31 03:36:24 root Made it work right. Using some of the network code from Artur Skawina's fetchwww.c Revision 1.1 1997/01/31 01:10:50 root Initial revision */ #include #include #include #include #include #include #include #include #include #include #include /* for uname functions */ #include #define NAME "DYN" #define VERSION "1.0.4" /* Uncomment DEBUG if you want to see raw HTML output from the server (not neccessary unless you REALLY want to know :)) */ /* NOTE: could also add -DDEBUG on gcc commandline */ /* #define DEBUG */ /* These are just in here so I can change them easily if the server or path the freed.cgi changes (or if the WWW port number changes!! :)) */ #define WWW_PORT 80 #define SERVER "scripts.ml.org" #define SCRIPT "/mis-bin/freed.cgi" int strtcmp(char *str1, char *str2) { return (strncmp(str1, str2, strlen(str2))); } void nuke_string(char *targetstring) { char *mystring = targetstring; while (*targetstring != '\0') { *targetstring = ' '; targetstring++; } *mystring = '\0'; } int main(int argc, void *argv[]) { struct sockaddr_in sin; struct hostent *host; int sock, port, connected; char send[1024]; char temp[1024]; int i; FILE *rfile; struct utsname uts; int sec1, sec2, sec3; char mid[10]; char hostname[10]; char ip[16]; printf("%s %s by Jon Klippenstein Copyright (C) 1997\n", NAME, VERSION); printf("Amiga compile by Deryk Robosson (27.05.97)\n"); #ifdef DEBUG printf("*** DEBUG MODE ***\n"); #endif openlog(argv[0], LOG_PID, LOG_USER); if (argc != 7) { printf("\nusage: %s MID SEC1 SEC2 SEC3 IP MACHINE\n", argv[0]); printf("\tMID\tyour Monolith Coalition ID\n"); printf("\tSEC1\tthe first number in your security code\n"); printf("\tSEC2\tthe second number in your security code\n"); printf("\tSEC3\tthe third number in your security code\n"); printf("\tIP\tyour machines CURRENT dynamic IP.\n"); printf("\tMACHINE\tyour dynamic dns name, such as xpl.\n\n"); printf("Example: %s klip1 11 22 33 123.123.123.123 xpl\n\n", argv[0]); exit(1); } uname(&uts); strcpy(mid, argv[1]); sec1 = atoi(argv[2]); sec2 = atoi(argv[3]); sec3 = atoi(argv[4]); strcpy(ip, argv[5]); strcpy(hostname, argv[6]); nuke_string(argv[0]); nuke_string(argv[1]); nuke_string(argv[2]); nuke_string(argv[3]); nuke_string(argv[4]); nuke_string(argv[5]); nuke_string(argv[6]); strcpy(argv[0], VERSION); printf("Host:\t%s.dyn.ml.org\n", hostname); printf("IP:\t%s\n", ip); printf("MID:\t%s\n", mid); printf("MACTYP:\t%s\n", uts.machine); printf("OS:\t%s\n", uts.sysname); sin.sin_family = AF_INET; sin.sin_port = htons(80); if (!(host = gethostbyname(SERVER))) { syslog(LOG_WARNING, "gethostbyname: %m"); perror("gethostbyname"); exit(1); } memcpy((char *) &sin.sin_addr, host->h_addr, host->h_length); printf("\nConnecting to %s...", SERVER); if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) { syslog(LOG_WARNING, "socket: %m"); perror("socket"); exit(1); } if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) == -1) { syslog(LOG_WARNING, "connect: %m"); perror("connect:"); exit(1); } printf("connnected.\n"); /* Now create line to send to HTTP server */ printf("Sending update..."); /* NEW 1.0.4: Added expire-date and expire-time fields for expiration, if it ever becomes real. For now they are set to 0. Also added tagline support. Don't know if these have been implemented on the server yet. Removed mactype and os. */ /* This sprintf is REALLY ugly. Do something about it Jon :) */ sprintf(send, "GET %s?do=mod\ &type=machine\ &domain=%s\ &db=DYN.ML.ORG\ &ipaddr=%s\ &WWW=yes\ &mail=\ &expire-date=0\ &expire-time=0\ &tagline=DYN+%s/%s\ &MID=%s\ &sec1=%d\ &sec2=%d\ &sec3=%d\ &agree=agree\n", SCRIPT, hostname, ip, VERSION, uts.sysname, mid, sec1, sec2, sec3); #ifdef DEBUG printf("\n\n%s\n\n", send); #endif write(sock, send, strlen(send)); printf("done.\n"); printf("Waiting for reply..."); rfile = fdopen(sock, "r"); while (!feof(rfile)) { fgets(temp, (int) sizeof(temp), (FILE *) rfile); #ifdef DEBUG printf("%s", temp); #endif /* Check for the ml-host-added magic token as explained by Aveek Datta: MTTS has been updated to remove the "DYNDNS isn ot available yet". And as someone asked, there is now a magic token in the return that you can test for: is present if the host was added/modified OK */ if (strtcmp(temp, "") == 0) { printf("\n\n%s [%s] was updated successfully.\n", hostname, ip); syslog(LOG_INFO, "%s [%s] update successful.", hostname, ip); fclose(rfile); close(sock); exit(0); } } printf("\nERROR: ML-HOST-ADDED magic token not found in reply.\nHost NOT updated.\n"); syslog(LOG_ERR, "ERROR: ML-HOST-ADDED not found, update unsuccessful."); fclose(rfile); close(sock); }