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/*
* Copyright (c) 2007-2013, Paul Meng (mirnshi@gmail.com)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
**/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include "globle.h"
#include "remote.h"
#include "readline.h"
#include "utils.h"
int open_remote(int fdio, const char *destip, const u_short destport)
{
int s;
struct sockaddr_in addr_in;
struct termios termios;
char kb[512];
u_char outbuf[512];
int rc;
int i;
struct timeval tv;
fd_set fset;
static FILE *fpio;
i = inet_addr(destip);
if (i == -1) {
printf("Invalid IP address\n");
return 0;
}
s = socket(AF_INET, SOCK_STREAM, 0);
if (s == -1)
return 0;
bzero(&addr_in, sizeof(addr_in));
addr_in.sin_family = AF_INET;
addr_in.sin_addr.s_addr = inet_addr(destip);
addr_in.sin_port = htons(destport);
fpio = fdopen(fdio, "w");
rc = connect(s, (struct sockaddr*)&addr_in, sizeof(struct sockaddr));
if (rc < 0) {
if (errno == EINPROGRESS) {
FD_ZERO(&fset);
FD_SET(s, &fset);
tv.tv_sec = 5;
tv.tv_usec = 0;
rc = select(s + 1, &fset, NULL, NULL, &tv);
if (rc > 0 && FD_ISSET(s, &fset)) {
i = sizeof(rc);
getsockopt(s, SOL_SOCKET, SO_ERROR,
&rc, (socklen_t *)&i);
if (rc == 0)
goto next;
if (errno == EINPROGRESS)
fprintf(fpio, "Connect timeout\n");
else
fprintf(fpio, "Connect failed: %s\n",
strerror(errno));
} else if (rc == 0)
fprintf(fpio, "Connect timeout\n");
else
fprintf(fpio, "Connect error: %s\n",
strerror(errno));
fflush(fpio);
close(s);
return 1;
}
}
next:
set_terminal(fdio, &termios);
fprintf(fpio, "\r\nConnect %s:%d, press Ctrl+X to quit\r\n",
destip, destport);
fprintf(fpio,
"NOTES: you will be back to the starting point, NOT THE LAST, \r\n"
" if using Ctrl+X to quit.\r\n");
fflush(fpio);
while (1) {
/* check socket */
kb[0] = 0xff;
if (write(s, kb, 1) < 0)
break;
FD_ZERO(&fset);
FD_SET(s, &fset);
FD_SET(fdio, &fset);
tv.tv_sec = 5;
tv.tv_usec = 0;
rc = select((fdio > s) ? (fdio + 1) : (s + 1), &fset, NULL, NULL, &tv);
if (rc < 0)
break;
if (rc == 0)
continue;
if (FD_ISSET(s, &fset)) {
rc = read(s, outbuf, sizeof(outbuf));
if (rc < 0)
break;
if (rc > 0) {
i = 0;
/* discard IAC */
while (outbuf[i] == 0xff && i < rc)
i += 3;
if (i < rc) {
rc = write(fdio, outbuf + i, rc - i);
if (rc < 0)
break;
}
}
}
if (FD_ISSET(fdio, &fset)) {
rc = read(fdio, kb, sizeof(kb));
if (rc < 0)
break;
if (kb[0] == CTRLX)
break;
/* my buddy likes '\r' */
if (kb[0] == LF) {
rc = write(s, "\r", 1);
if (rc < 0)
break;
continue;
}
if (rc > 0) {
rc = write(s, kb, rc);
if (rc < 0)
break;
}
}
}
close(s);
fprintf(fpio, "\r\nDisconnected from %s:%d\r\n",
destip, destport);
fflush(fpio);
reset_terminal(fdio, &termios);
return 0;
}
/* end of file */
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