Add netcat -i option, per patch from Cristian Ionescu-Idbohrn

<cristian.ionescu-idbohrn@axis.com>

diff --git a/include/usage.h b/include/usage.h
index d690d90..ad34dfc 100644 (file)
--- 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 5335872..e1741cd 100644 (file)
--- 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);
+                               }
                        }
                }
        }