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| #include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sgtty.h>
#include <sys/inet/in.h>
#include "config.h"
#define RESETTIME 15*60
static char *cmdname;
static in_addr myaddr;
catch_hup()
{
signal(SIGHUP, catch_hup);
}
main(argc, argv)
char *argv[];
{
int other_end, my_pid;
cmdname = argv[0];
switch(argc){
case 3:
ipconfig(0, argv[1], argv[2]);
pause();
break;
case 4:
my_pid = getpid();
setpgrp(my_pid, my_pid);
signal(SIGHUP, catch_hup);
while(1) {
other_end = callup(argv[1], argv[3], argv[2]);
if (other_end < 0) {
fprintf(stderr, "%s: call failed\n", cmdname);
sleep(60);
continue;
}
if (ioctl(other_end, TIOCSPGRP, 0) < 0) {
fprintf(stderr, "%s: couldn't set pgrp\n", cmdname);
close(other_end);
sleep(60);
continue;
}
ipconfig(other_end, argv[2], argv[3]);
pause();
close(other_end);
}
break;
default:
fprintf(stderr, "Usage: %s dk-address my-ip-addr his-ip-addr\n",
cmdname);
exit(1);
}
}
static int
ipconfig(ipfd, me, it)
int ipfd;
char *me, *it;
{
in_addr hisaddr, inaddr;
int x;
myaddr = in_address(me);
if(myaddr == 0){
fprintf(stderr, "ipconfig: unknown host %s\n", me);
exit(1);
}
hisaddr = in_address(it);
if(hisaddr == 0){
fprintf(stderr, "ipconfig: unknown host/net %s\n", it);
exit(1);
}
x = 10; /* IP line disc # */
if(ioctl(ipfd, FIOPUSHLD, &x) < 0){
perror("PUSHLD");
exit(1);
}
if(ioctl(ipfd, IPIOLOCAL, &myaddr) < 0){
perror("IPIOLOCAL");
exit(1);
}
if(hisaddr & 0xff){
ioctl(ipfd, IPIOHOST, &hisaddr);
} else {
ioctl(ipfd, IPIONET, &hisaddr);
}
}
static int
callup(host, a1, a2)
char *host, *a1, *a2;
{
char cmd[512];
strcpy(cmd, DKIPCONFIG);
strcat(cmd, " ");
strcat(cmd, a1);
strcat(cmd, " ");
strcat(cmd, a2);
return(tdkexec(host, cmd));
}
static int
still_there(ipfd)
int ipfd;
{
return ioctl(ipfd, IPIOLOCAL, &myaddr) >= 0;
}
|