1323c940f
Eric Andersen
2002-04-26
Subject
Add netcat -i option, per patch from Cristian Ionescu-Idbohrn
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Commit Diff GitHub →
include/usage.h+1 -0
| @@ -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" \ | |
networking/nc.c+40 -2
| @@ -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); |
| + | } |
| } | |
| } | |
| } | |