This commit was manufactured by cvs2svn to create tag 'busybox_1_00'.

1 files changed, 177 insertions, 0 deletions

diff --git a/busybox/networking/nc.c b/busybox/networking/nc.c
new file mode 100644
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--- /dev/null
+++ b/busybox/networking/nc.c
@@ -0,0 +1,177 @@
+/* vi: set sw=4 ts=4: */
+/*  nc: mini-netcat - built from the ground up for LRP
+    Copyright (C) 1998  Charles P. Wright
+
+    0.0.1   6K      It works.
+    0.0.2   5K      Smaller and you can also check the exit condition if you wish.
+    0.0.3	    Uses select()
+
+    19980918 Busy Boxed! Dave Cinege
+    19990512 Uses Select. Charles P. Wright
+    19990513 Fixes stdin stupidity and uses buffers.  Charles P. Wright
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include "busybox.h"
+
+#define GAPING_SECURITY_HOLE
+
+int nc_main(int argc, char **argv)
+{
+	int do_listen = 0, lport = 0, delay = 0, tmpfd, opt, sfd, x;
+	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:i:e:")) > 0) {
+		switch (opt) {
+			case 'l':
+				do_listen++;
+				break;
+			case 'p':
+				lport = bb_lookup_port(optarg, "tcp", 0);
+				break;
+			case 'i':
+				delay = atoi(optarg);
+				break;
+#ifdef GAPING_SECURITY_HOLE
+			case 'e':
+				pr00gie = optarg;
+				break;
+#endif
+			default:
+				bb_show_usage();
+		}
+	}
+
+#ifdef GAPING_SECURITY_HOLE
+	if (pr00gie) {
+		/* won't need stdin */
+		close (STDIN_FILENO);      
+	}
+#endif /* GAPING_SECURITY_HOLE */
+
+
+	if ((do_listen && optind != argc) || (!do_listen && optind + 2 != argc))
+		bb_show_usage();
+
+	if ((sfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+		bb_perror_msg_and_die("socket");
+	x = 1;
+	if (setsockopt (sfd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof (x)) == -1)
+		bb_perror_msg_and_die ("reuseaddr failed");
+	address.sin_family = AF_INET;
+
+	if (lport != 0) {
+		memset(&address.sin_addr, 0, sizeof(address.sin_addr));
+		address.sin_port = lport;
+
+		if (bind(sfd, (struct sockaddr *) &address, sizeof(address)) < 0)
+			bb_perror_msg_and_die("bind");
+	}
+
+	if (do_listen) {
+		socklen_t addrlen = sizeof(address);
+
+		if (listen(sfd, 1) < 0)
+			bb_perror_msg_and_die("listen");
+
+		if ((tmpfd = accept(sfd, (struct sockaddr *) &address, &addrlen)) < 0)
+			bb_perror_msg_and_die("accept");
+
+		close(sfd);
+		sfd = tmpfd;
+	} else {
+		hostinfo = xgethostbyname(argv[optind]);
+
+		address.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
+		address.sin_port = bb_lookup_port(argv[optind+1], "tcp", 0);
+
+		if (connect(sfd, (struct sockaddr *) &address, sizeof(address)) < 0)
+			bb_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);
+
+	while (1) {
+		int fd;
+		int ofd;
+		int nread;
+
+		testfds = readfds;
+
+		if (select(FD_SETSIZE, &testfds, NULL, NULL, NULL) < 0)
+			bb_perror_msg_and_die("select");
+
+		for (fd = 0; fd < FD_SETSIZE; fd++) {
+			if (FD_ISSET(fd, &testfds)) {
+				if ((nread = safe_read(fd, buf, sizeof(buf))) < 0)
+					bb_perror_msg_and_die("read");
+
+				if (fd == sfd) {
+					if (nread == 0)
+						exit(0);
+					ofd = STDOUT_FILENO;
+				} else {
+					if (nread == 0)
+						shutdown(sfd, 1);
+					ofd = sfd;
+				}
+
+				if (bb_full_write(ofd, buf, nread) < 0)
+					bb_perror_msg_and_die("write");
+				if (delay > 0) {
+					sleep(delay);
+				}
+			}
+		}
+	}
+}