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author | Andreas Baumann <mail@andreasbaumann.cc> | 2015-01-03 12:04:58 +0100 |
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committer | Andreas Baumann <mail@andreasbaumann.cc> | 2015-01-03 12:04:58 +0100 |
commit | 008d0be72b2f160382c6e880765e96b64a050c65 (patch) | |
tree | 36f48a98a3815a408e2ce1693dd182af90f80305 /release/src/router/busybox/nc.c | |
parent | 611becfb8726c60cb060368541ad98191d4532f5 (diff) | |
download | tomato-008d0be72b2f160382c6e880765e96b64a050c65.tar.gz tomato-008d0be72b2f160382c6e880765e96b64a050c65.tar.bz2 |
imported original firmware WRT54GL_v4.30.11_11_US
Diffstat (limited to 'release/src/router/busybox/nc.c')
-rw-r--r-- | release/src/router/busybox/nc.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/release/src/router/busybox/nc.c b/release/src/router/busybox/nc.c new file mode 100644 index 00000000..5335872e --- /dev/null +++ b/release/src/router/busybox/nc.c @@ -0,0 +1,137 @@ +/* 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" + +int nc_main(int argc, char **argv) +{ + int do_listen = 0, lport = 0, tmpfd, opt, sfd; + char buf[BUFSIZ]; + + struct sockaddr_in address; + struct hostent *hostinfo; + + fd_set readfds, testfds; + + while ((opt = getopt(argc, argv, "lp:")) > 0) { + switch (opt) { + case 'l': + do_listen++; + break; + case 'p': + lport = atoi(optarg); + break; + default: + show_usage(); + } + } + + if ((do_listen && optind != argc) || (!do_listen && optind + 2 != argc)) + show_usage(); + + if ((sfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) + perror_msg_and_die("socket"); + + address.sin_family = AF_INET; + + if (lport != 0) { + memset(&address.sin_addr, 0, sizeof(address.sin_addr)); + address.sin_port = htons(lport); + + if (bind(sfd, (struct sockaddr *) &address, sizeof(address)) < 0) + perror_msg_and_die("bind"); + } + + if (do_listen) { + socklen_t addrlen = sizeof(address); + + if (listen(sfd, 1) < 0) + perror_msg_and_die("listen"); + + if ((tmpfd = accept(sfd, (struct sockaddr *) &address, &addrlen)) < 0) + 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 = htons(atoi(argv[optind+1])); + + if (connect(sfd, (struct sockaddr *) &address, sizeof(address)) < 0) + perror_msg_and_die("connect"); + } + + 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) + 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) + 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 (full_write(ofd, buf, nread) < 0) + perror_msg_and_die("write"); + } + } + } +} |