diff options
Diffstat (limited to 'ptunnel.c')
| -rwxr-xr-x | ptunnel.c | 59 |
1 files changed, 5 insertions, 54 deletions
@@ -165,6 +165,8 @@ int main(int argc, char *argv[]) { log_file = stdout; // Parse options + parse_options(argc, argv); + opt = kOpt_undefined; mode = kMode_proxy; for (i=1;i<argc;i++) { @@ -303,14 +305,14 @@ int main(int argc, char *argv[]) { break; #endif /* !WIN32 */ case kOpt_undefined: - usage(argv[0]); + print_usage(argv[0]); return 1; } opt = kOpt_undefined; } } if (opt != kOpt_undefined) { - usage(argv[0]); + print_usage(argv[0]); exit(1); } if (pcap && use_udp) { @@ -398,7 +400,7 @@ int main(int argc, char *argv[]) { if (mode == kMode_forward) { if (!given_proxy_ip || !given_dst_ip || !tcp_port || !tcp_listen_port) { printf("One of the options are missing or invalid.\n"); - usage(argv[0]); + print_usage(argv[0]); return -1; } pt_forwarder(); @@ -425,57 +427,6 @@ int main(int argc, char *argv[]) { return 0; } - -void usage(char *exec_name) { -print_usage(exec_name); - printf("ptunnel v %d.%.2d.\n", kMajor_version, kMinor_version); - printf("Usage: %s -p <addr> -lp <port> -da <dest_addr> -dp <dest_port> [-m max_tunnels] [-v verbosity] [-f logfile]\n", exec_name); - printf(" %s [-m max_threads] [-v verbosity] [-c <device>]\n", exec_name); - printf(" -a: Set ICMP Tunnel magic hexadecimal number e.g. %X\n", magic); - printf(" -p: Set address of peer running packet forwarder. This causes\n"); - printf(" ptunnel to operate in forwarding mode - the absence of this\n"); - printf(" option causes ptunnel to operate in proxy mode.\n"); - printf(" -lp: Set TCP listening port (only used when operating in forward mode)\n"); - printf(" -da: Set remote proxy destination address if client\n"); - printf(" Restrict to only this destination address if server\n"); - printf(" -dp: Set remote proxy destionation port if client\n"); - printf(" Restrict to only this destination port if server\n"); - printf(" -m: Set maximum number of concurrent tunnels\n"); - printf(" -v: Verbosity level (-1 to 4, where -1 is no output, and 4 is all output)\n"); - printf(" -c: Enable libpcap on the given device.\n"); - printf(" -f: Specify a file to log to, rather than printing to standard out.\n"); - printf(" -s: Client only. Enables continuous output of statistics (packet loss, etc.)\n"); - #ifndef WIN32 - printf("-daemon: Run in background, the PID will be written in the file supplied as argument\n"); - printf("-syslog: Output debug to syslog instead of standard out.\n"); - #endif /* !WIN32 */ - printf(" -udp: Toggle use of UDP instead of ICMP. Proxy will listen on port 53 (must be root).\n\n"); - - printf("Security features: [-x password] [-u] [-setuid user] [-setgid group] [-chroot dir]\n"); - printf(" -x: Set password (must be same on client and proxy)\n"); - printf(" -u: Run proxy in unprivileged mode. This causes the proxy to forward\n"); - printf(" packets using standard echo requests, instead of crafting custom echo replies.\n"); - printf(" Unprivileged mode will only work on some systems, and is in general less reliable\n"); - printf(" than running in privileged mode.\n"); - #ifndef WIN32 - printf(" Please consider combining the following three options instead:\n"); - printf("-setuid: When started in privileged mode, drop down to user's rights as soon as possible\n"); - printf("-setgid: When started in privileged mode, drop down to group's rights as soon as possible\n"); - printf("-chroot: When started in privileged mode, restrict file access to the specified directory\n"); - printf("-setcon: Set SELinux context when all there is left to do are network I/O operations\n"); - printf(" To combine with -chroot you will have to `mount --bind /proc /chrootdir/proc`\n"); - #endif /* !WIN32 */ - - printf("\nStarting the proxy (needs to run as root):\n"); - printf(" [root #] %s\n", exec_name); - printf("Starting a client (also needs root):\n"); - printf(" [root #] %s -p proxy.pingtunnel.com -lp 8000 -da login.domain.com -dp 22 -c eth0\n", exec_name); - printf("And then using the tunnel to ssh to login.domain.com:\n"); - printf(" [user $] ssh -p 8000 localhost\n"); - printf("And that's it. Enjoy your tunnel!\n\n"); -} - - /* pt_forwarder: Sets up a listening TCP socket, and forwards incoming connections over ping packets. |