diff options
Diffstat (limited to 'source3/sockspy.c')
| -rw-r--r-- | source3/sockspy.c | 302 |
1 files changed, 0 insertions, 302 deletions
diff --git a/source3/sockspy.c b/source3/sockspy.c deleted file mode 100644 index 806b737915..0000000000 --- a/source3/sockspy.c +++ /dev/null @@ -1,302 +0,0 @@ -/* - USAGE - sockspy desthost destservice - -You install this program in /etc/inetd.conf and /etc/services - -For example I have used these entries: - -/etc/services: -spy 8001/tcp spy port - -/etc/inetd.conf: -spy stream tcp nowait tridge /usr/local/smb/sockspy sockspy fjall netbios-ssn - -This means any connection to port 8001 will be redirected to -netbios-ssn on fjall. By playing with these parameters you can easily -spy on most of the tcp protocols. All packets traversing the link will -be captured. - -NOTE: This program is totally unsupported. I haven't used it for 2 -years, and don't intend to fix the obvious bugs/limitations. I will, -however, accept contributed patches - or even a total rewrite :-) -*/ - -#include <stdio.h> -#include <strings.h> -#include <sys/types.h> -#include <sys/dir.h> -#include <sys/socket.h> -#include <sys/ioctl.h> -#include <netinet/in.h> -#include <netdb.h> - -#include <signal.h> - -#include <errno.h> -#include <sysexits.h> - -int trans_num = 0; - -#ifndef LOGIN -#define LOGIN "/tmp/spy.in" -#endif - -#ifndef LOGOUT -#define LOGOUT "/tmp/spy.out" -#endif - -#ifndef LOGCMD -#define LOGCMD "/tmp/spy.cmd" -#endif - -FILE *cmd = NULL; -FILE *login = NULL; -FILE *logout = NULL; - -#define STREQL(a, b) (strcmp(a, b) == 0) -#define NIL (0) - -char DestHost[256]; /* Remote system to connect to */ -char DestObj[256]; /* Remote object/service to connect to */ - -/* Signal handler for SIGPIPE (write on a disconnected socket) */ -abort() -{ - if (cmd) - { - fprintf(cmd,"writing to disconnected socket!\n"); - fflush(cmd); - } - exit(1); -} - - -main(argc, argv) -int argc; /* # of command line arguments */ -char *argv[]; /* the command line arguments */ -{ - int client, /* Socket connected to client */ - server; /* Socket to use for server */ - - trans_num = 0; -#ifndef NOLOG - login = fopen(LOGIN,"w"); - logout = fopen(LOGOUT,"w"); - cmd = fopen(LOGCMD,"w"); -#endif - - if (cmd) - { - fprintf(cmd,"Started server\n"); - fflush(cmd); - } - - /* Check usage */ - if(argc != 3) - return; - - strcpy(DestHost,argv[1]); - strcpy(DestObj,argv[2]); - - /* Time to attempt the connection */ - server = inet_conn(DestHost, DestObj); - - if( server < 0 ) { - exit(EX_CANTCREAT); - } - - /* Just to make the code more readable */ - client = 0; - - /* We will abort gracefully when the client or remote system - goes away */ - signal(SIGPIPE, abort); - - /* Now just go and move raw data between client and - remote system */ - dowork(client, server); - /* ... NEVER RETURNS ... */ -} - -dowork(client, server) - int client, server; -{ - - /* select(2) masks for client and remote */ - int ClientMask, ServerMask; - - /* Combined ClientMask and ServerMask */ - int ReadMask; - - /* Initialize select(2) masks */ - ClientMask = 1<<client; - ServerMask = 1<<server; - - ReadMask = ClientMask | ServerMask; - - /* Now move raw data for the rest of our life between - client and remote */ - for( ; ; ) { - /* Local Variables */ - int SelectReadMask;/* select(2) mask modifiable by select(2) */ - int nready; /* status return from select(2) */ - - do { - /* Intialize select(2) mask everytime - as select(2) always modifies it */ - SelectReadMask = ReadMask; - - /* Wait for data to be present to be moved */ - errno = 0; - nready = select(32,&SelectReadMask,(int *)0,(int *)0,NIL); - } while( nready < 0 && errno == EINTR ); - - /* select(2) failed, shouldn't happen. Exit abnormally */ - if( nready < 0 ) - exit(EX_SOFTWARE); - - /* Favor the client (for no particular reason) - if s/he is has data */ - if( SelectReadMask & ClientMask ) - { - if (cmd) - fprintf(cmd,"client %d\n",nready); - xfer(client, server,login); - } - - /* Then check on the other guy */ - if( SelectReadMask & ServerMask ) - { - if (cmd) - fprintf(cmd,"server %d\n",nready); - xfer(server, client,logout); - } - } - - /* NEVER REACHED */ -} - -#define BUFSIZE 20000 /* Max bytes to move at a time */ - -xfer(from, to,file) - int from, to; /* Move data from "from" to "to" */ - FILE *file; -{ - static char buf[BUFSIZE]; /* Buffer data to be moved */ - int nready; /* # bytes readable */ - int got; /* # bytes actually being moved */ - int ret; - - /* Query the system how many bytes are ready to be read */ - ioctl(from, FIONREAD, &nready); - - if (cmd) - fprintf(cmd,"nready = %d\n",nready); - - /* Only try to get the smaller of nready and BUFSIZE */ - got = read(from, buf, nready < BUFSIZE ? nready : BUFSIZE); - - /* Zero bytes returned indicates end of stream, exit gracefully */ - if( got == 0 ) - { - if (cmd) - { - fprintf(cmd,"read 0 bytes exiting\n"); - fflush(cmd); - } - if (login) - fclose(login); - if (logout) - fclose(logout); - if (cmd) - fclose(cmd); - exit(EX_OK); - } - - - if (file) - { - fprintf(file,"\nTransaction %d\n",trans_num); - fwrite(buf,got,1,file); - fflush(file); - } - trans_num++; - - /* Now send it accross to the other side */ - ret = write(to, buf, got); - - if (cmd) - { - fprintf(cmd,"wrote %d\n",ret); - if (ret < 0) - fprintf(cmd,"error = %s\n",strerror(errno)); - } -} - -int -inet_conn(host, port) - char *host; - char *port; -{ - /* Local Vars */ - int sock; /* Socket to use for the connection */ - struct hostent *hostent; /* Destination host entry */ - struct servent *servent; /* Destination service entry */ - struct sockaddr_in addr; /* Formated destination for connect */ - - /* Fetch the requested host and service entries */ - hostent = gethostbyname(host); - if (isdigit(*port)) - servent = getservbyport(80, "tcp"); - else - servent = getservbyname(port, "tcp"); - - - if (cmd) - { - fprintf(cmd,"inet_conn %s %s\n",host,port); - - if (servent == NULL) - fprintf(cmd,"servent is NIL\n"); - if (hostent == NULL) - fprintf(cmd,"hostent is NIL\n"); - if (hostent->h_addrtype != AF_INET) - fprintf(cmd,"not inet type\n"); - fflush(cmd); - } - - - /* No host entry, no service entry, or host is not - Internet, error! */ - if( servent == NIL || - hostent == NIL || - hostent->h_addrtype != AF_INET ) - return -1; - - /* Get a socket from the system to use for the connection */ - if( (sock = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) - return -1; - - /* Make sure we start with a clean address structure ... */ - bzero(&addr, sizeof(addr)); - - /* ... then fill in the required fields */ - addr.sin_family = AF_INET; - addr.sin_port = servent->s_port; - bcopy(hostent->h_addr, &addr.sin_addr, hostent->h_length); - - /* Now try to connection to the destination */ - if( connect(sock, &addr, sizeof(addr)) < 0 ) { - /* No go, release the socket, and then return error! */ - close(sock); - return -1; - } - - /* Success. Return the connected socket descriptor */ - if (cmd) - fprintf(cmd,"returning %d\n",sock); - return sock; -} - - |