diff options
| -rw-r--r-- | include/usage.h | 1 | ||||
| -rw-r--r-- | networking/nc.c | 42 |
2 files changed, 41 insertions, 2 deletions
diff --git a/include/usage.h b/include/usage.h index d690d90f9..ad34dfcff 100644 --- a/include/usage.h +++ b/include/usage.h @@ -1267,6 +1267,7 @@ "Options:\n" \ "\t-l\t\tlisten mode, for inbound connects\n" \ "\t-p PORT\t\tlocal port number\n" \ + "\t-i SECS\t\tdelay interval for lines sent\n" \ "\t-e PROG\t\tprogram to exec after connect (dangerous!)" #define nc_example_usage \ "$ nc foobar.somedomain.com 25\n" \ diff --git a/networking/nc.c b/networking/nc.c index 5335872e5..e1741cdb3 100644 --- a/networking/nc.c +++ b/networking/nc.c @@ -40,17 +40,22 @@ #include <sys/ioctl.h> #include "busybox.h" +#define GAPING_SECURITY_HOLE + int nc_main(int argc, char **argv) { - int do_listen = 0, lport = 0, tmpfd, opt, sfd; + int do_listen = 0, lport = 0, delay = 0, tmpfd, opt, sfd; char buf[BUFSIZ]; +#ifdef GAPING_SECURITY_HOLE + char * pr00gie = NULL; +#endif struct sockaddr_in address; struct hostent *hostinfo; fd_set readfds, testfds; - while ((opt = getopt(argc, argv, "lp:")) > 0) { + while ((opt = getopt(argc, argv, "lp:i:e:")) > 0) { switch (opt) { case 'l': do_listen++; @@ -58,11 +63,27 @@ int nc_main(int argc, char **argv) case 'p': lport = atoi(optarg); break; + case 'i': + delay = atoi(optarg); + break; +#ifdef GAPING_SECURITY_HOLE + case 'e': + pr00gie = optarg; + break; +#endif default: show_usage(); } } +#ifdef GAPING_SECURITY_HOLE + if (pr00gie) { + /* won't need stdin */ + close (fileno(stdin)); + } +#endif /* GAPING_SECURITY_HOLE */ + + if ((do_listen && optind != argc) || (!do_listen && optind + 2 != argc)) show_usage(); @@ -100,6 +121,20 @@ int nc_main(int argc, char **argv) perror_msg_and_die("connect"); } +#ifdef GAPING_SECURITY_HOLE + /* -e given? */ + if (pr00gie) { + dup2(sfd, 0); + close(sfd); + dup2 (0, 1); + dup2 (0, 2); + execl (pr00gie, pr00gie, NULL); + /* Don't print stuff or it will go over the wire.... */ + _exit(-1); + } +#endif /* GAPING_SECURITY_HOLE */ + + FD_ZERO(&readfds); FD_SET(sfd, &readfds); FD_SET(STDIN_FILENO, &readfds); @@ -131,6 +166,9 @@ int nc_main(int argc, char **argv) if (full_write(ofd, buf, nread) < 0) perror_msg_and_die("write"); + if (delay > 0) { + sleep(delay); + } } } } |