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authorEric Andersen1999-10-05 16:24:54 +0000
committerEric Andersen1999-10-05 16:24:54 +0000
commitcc8ed39b240180b58810784f844e253263594ac3 (patch)
tree15feebbb4be9a9168209609f48f0b100f9364420 /mnc.c
downloadbusybox-cc8ed39b240180b58810784f844e253263594ac3.zip
busybox-cc8ed39b240180b58810784f844e253263594ac3.tar.gz
Initial revision0_29alpha2
Diffstat (limited to 'mnc.c')
-rw-r--r--mnc.c148
1 files changed, 148 insertions, 0 deletions
diff --git a/mnc.c b/mnc.c
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+/* mnc: 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.
+
+
+ 19980918 Busy Boxed! Dave Cinege
+
+ 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>
+
+const char mnc_usage[] =
+"mini-netcat 0.0.1 -- Open pipe to IP:port\n"
+"\tmnc [IP] [port]\n";
+
+int
+mnc_main(struct FileInfo * i, int argc, char **argv)
+{
+
+ int sfd;
+ int result;
+ int len;
+ int pid;
+ char ch;
+
+ struct sockaddr_in address;
+ struct hostent *hostinfo;
+
+#ifdef SELECT
+ fd_set readfds, testfds;
+#endif
+
+ sfd = socket(AF_INET, SOCK_STREAM, 0);
+
+ hostinfo = (struct hostent *) gethostbyname(argv[1]);
+
+ 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[2]));
+
+ len = sizeof(address);
+
+ result = connect(sfd, (struct sockaddr *)&address, len);
+
+ if (result < 0)
+ {
+ exit(2);
+ }
+
+#ifdef SELECT
+ FD_ZERO(&readfds);
+ FD_SET(sfd, &readfds);
+ FD_SET(fileno(stdin), &readfds);
+
+ while(1)
+ {
+ int fd;
+ 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))
+ {
+ ioctl(fd, FIONREAD, &nread);
+
+ if (nread == 0)
+ exit(0);
+
+ if(fd == sfd)
+ {
+ read(sfd, &ch, 1);
+ write(fileno(stdout), &ch, 1);
+ }
+ else
+ {
+ read(fileno(stdin), &ch, 1);
+ write(sfd, &ch, 1);
+ }
+ }
+ }
+ }
+#else
+ pid = fork();
+
+ if (!pid)
+ {
+ int retval;
+ retval = 1;
+ while(retval == 1)
+ {
+ retval = read(fileno(stdin), &ch, 1);
+ write(sfd, &ch, 1);
+ }
+ }
+ else
+ {
+ int retval;
+ retval = 1;
+ while(retval == 1)
+ {
+ retval = read(sfd, &ch, 1);
+ write(fileno(stdout), &ch, 1);
+ }
+ }
+
+ exit(0);
+#endif
+}