int
main(int argc, char **argv)
{
int sock;
fd_set rset, wset;
sock = bind_socket();
set_nonblock(STDIN_FILENO);
set_nonblock(sock);
FD_ZERO(&rset);
FD_ZERO(&wset);
FD_SET(sock, &wset);
for (;;) {
int res;
ssize_t n;
FD_SET(STDIN_FILENO, &rset);
FD_SET(sock, &rset);
res = select(sock + 1, &rset, &wset, NULL, NULL);
if (res == -1)
error_quit("select");
if (FD_ISSET(STDIN_FILENO, &rset)) {
char buf[1];
n = read(STDIN_FILENO, buf, 1);
if (n == -1 && errno != EWOULDBLOCK)
error_quit("read");
else if (n == 0) {
close(sock);
exit(0); /* got EOF from erlang */
}
}
if (FD_ISSET(sock, &wset)) {
FD_CLR(sock, &wset);
request_dump(sock);
read_routes(sock);
}
if (FD_ISSET(sock, &rset))
read_routes(sock);
}
return 0;
}
int main(int argc, char **argv)
{
int s, i;
struct sockaddr_in loc_addr;
struct timeval timeout;
time_t timenow, timelast = 0;
int interval = 3600;
fd_set fdset;
if (!load_dests()) {
fprintf(stderr, "rip98d: no destination routers defined\n");
return 1;
}
while ((i = getopt(argc, argv, "dlrt:v")) != -1) {
switch (i) {
case 'd':
debug = TRUE;
break;
case 'l':
logging = TRUE;
break;
case 'r':
route_restrict = TRUE;
break;
case 't':
interval = atoi(optarg) * 60;
if (interval < 60 || interval > 7200) {
fprintf(stderr, "rip98d: invalid time interval\n");
return 1;
}
break;
case 'v':
printf("rip98d: %s\n", VERSION);
return 0;
case ':':
fprintf(stderr, "rip98d: invalid time interval\n");
return 1;
case '?':
fprintf(stderr, "usage: rip98d [-d] [-l] [-r] [-t interval] [-v]\n");
return 1;
}
}
signal(SIGTERM, terminate);
if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
perror("rip98d: socket");
return 1;
}
memset((char *)&loc_addr, 0, sizeof(loc_addr));
loc_addr.sin_family = AF_INET;
loc_addr.sin_addr.s_addr = htonl(INADDR_ANY);
loc_addr.sin_port = htons(RIP_PORT);
if (bind(s, (struct sockaddr *)&loc_addr, sizeof(loc_addr)) < 0) {
perror("rip98d: bind");
close(s);
return 1;
}
if (!daemon_start(FALSE)) {
fprintf(stderr, "rip98d: cannot become a daemon\n");
close(s);
return 1;
}
if (logging) {
openlog("rip98d", LOG_PID, LOG_DAEMON);
syslog(LOG_INFO, "starting");
}
for (;;) {
FD_ZERO(&fdset);
FD_SET(s, &fdset);
timeout.tv_sec = 60;
timeout.tv_usec = 0;
select(s + 1, &fdset, NULL, NULL, &timeout);
if (!read_routes()) {
if (logging)
closelog();
return 1;
}
if (FD_ISSET(s, &fdset))
receive_routes(s);
time(&timenow);
if ((timenow - timelast) > interval) {
timelast = timenow;
if (first_route != NULL)
transmit_routes(s);
}
}
}
