1 files changed, 133 insertions, 0 deletions
diff --git a/nc.c b/nc.c
new file mode 100644
index 000000000..a588587fb
--- /dev/null
+++ b/nc.c
@@ -0,0 +1,133 @@
+/* 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 "internal.h"
+#include <stdio.h>
+#include <stdlib.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>
+
+#define BUFSIZE 100
+
+static const char nc_usage[] = "nc [IP] [port]\n" 
+#ifndef BB_FEATURE_TRIVIAL_HELP
+	"\nNetcat opens a pipe to IP:port\n"
+#endif
+	;
+
+int nc_main(int argc, char **argv)
+{
+	int sfd;
+	int result;
+	int len;
+	char ch[BUFSIZE];
+
+	struct sockaddr_in address;
+	struct hostent *hostinfo;
+
+	fd_set readfds, testfds;
+
+	argc--;
+	argv++;
+	if (argc < 2 || **(argv + 1) == '-') {
+		usage(nc_usage);
+	}
+
+	sfd = socket(AF_INET, SOCK_STREAM, 0);
+
+	hostinfo = (struct hostent *) gethostbyname(*argv);
+
+	if (!hostinfo) {
+		exit(1);
+	}
+
+	address.sin_family = AF_INET;
+	address.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
+	address.sin_port = htons(atoi(*(++argv)));
+
+	len = sizeof(address);
+
+	result = connect(sfd, (struct sockaddr *) &address, len);
+
+	if (result < 0) {
+		exit(2);
+	}
+
+	FD_ZERO(&readfds);
+	FD_SET(sfd, &readfds);
+	FD_SET(fileno(stdin), &readfds);
+
+	while (1) {
+		int fd;
+		int ofd;
+		int nread;
+
+		testfds = readfds;
+
+		result =
+			select(FD_SETSIZE, &testfds, (fd_set *) NULL, (fd_set *) NULL,
+				   (struct timeval *) 0);
+
+		if (result < 1) {
+			exit(3);
+		}
+
+		for (fd = 0; fd < FD_SETSIZE; fd++) {
+			if (FD_ISSET(fd, &testfds)) {
+				int trn = 0;
+				int rn;
+
+				ioctl(fd, FIONREAD, &nread);
+
+				if (fd == sfd) {
+					if (nread == 0)
+						exit(0);
+					ofd = fileno(stdout);
+				} else {
+					ofd = sfd;
+				}
+
+
+
+				do {
+					rn = (BUFSIZE < nread - trn) ? BUFSIZE : nread - trn;
+					trn += rn;
+					read(fd, ch, rn);
+					write(ofd, ch, rn);
+				}
+				while (trn < nread);
+			}
+		}
+	}
+}