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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <netdb.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "user_io.h"
static void alarm_handler(int sig)
{
}
int main(int argc, char **argv)
{
char buffer[256];
int s, addrlen = sizeof(struct sockaddr_in);
struct sockaddr_in addr;
struct hostent *hp;
struct servent *sp;
int verbose = 1;
paclen_in = 1024;
paclen_out = 1024;
while ((s = getopt(argc, argv, "ci:o:q")) != -1) {
switch (s) {
case 'c':
init_compress();
compression = 1;
break;
case 'i':
paclen_in = atoi(optarg);
break;
case 'o':
paclen_out = atoi(optarg);
break;
case 'q':
verbose = 0;
break;
case ':':
case '?':
err("ERROR: invalid option usage\n");
return 1;
}
}
if (paclen_in < 1 || paclen_out < 1) {
err("ERROR: invalid paclen\n");
return 1;
}
/*
* Arguments should be "tcp_call remaddr remport"
*/
if ((argc - optind) != 2) {
strcpy(buffer, "ERROR: invalid number of parameters\n");
err(buffer);
}
/*
* Open the socket into the kernel.
*/
s = socket(AF_INET, SOCK_STREAM, 0);
if (s < 0) {
sprintf(buffer, "ERROR: can't open socket: %s\n", strerror(errno));
err(buffer);
}
/*
* Resolve the hostname.
*/
hp = gethostbyname(argv[optind]);
if (hp == NULL) {
err("ERROR: Unknown host\n");
}
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = ((struct in_addr *)(hp->h_addr))->s_addr;
/*
* And the service name.
*/
if ((sp = getservbyname(argv[optind+1], "tcp")) != NULL)
addr.sin_port = sp->s_port;
else
addr.sin_port = htons(atoi(argv[optind+1]));
if (addr.sin_port == 0) {
err("ERROR: Unknown service\n");
}
if (verbose) {
sprintf(buffer, "*** Connecting to %s ...\n", hp->h_name);
user_write(STDOUT_FILENO, buffer, strlen(buffer));
}
/*
* If no response in 30 seconds, go away.
*/
alarm(30);
signal(SIGALRM, alarm_handler);
/*
* Lets try and connect to the far end.
*/
if (connect(s, (struct sockaddr *)&addr, addrlen) != 0) {
sprintf(buffer, "ERROR: can't connect: %s\n", strerror(errno));
err(buffer);
}
/*
* We got there.
*/
alarm(0);
if (verbose) {
strcpy(buffer, "*** Connected\n");
user_write(STDOUT_FILENO, buffer, strlen(buffer));
}
select_loop(s);
if (verbose) {
strcpy(buffer, "\n*** Disconnected\n");
user_write(STDOUT_FILENO, buffer, strlen(buffer));
}
end_compress();
return 0;
}
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