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/* $OpenBSD: check_tcp.c,v 1.4 2006/12/25 19:05:41 reyk Exp $ */
/*
* Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <net/if.h>
#include <limits.h>
#include <event.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include "hostated.h"
void tcp_write(int, short, void *);
void tcp_host_up(int s, struct ctl_tcp_event *);
void
check_tcp(struct ctl_tcp_event *cte)
{
int s;
int type;
socklen_t len;
struct timeval tv;
struct linger lng;
switch (cte->host->ss.ss_family) {
case AF_INET:
((struct sockaddr_in *)&cte->host->ss)->sin_port =
htons(cte->table->port);
break;
case AF_INET6:
((struct sockaddr_in6 *)&cte->host->ss)->sin6_port =
htons(cte->table->port);
break;
}
len = ((struct sockaddr *)&cte->host->ss)->sa_len;
if ((s = socket(cte->host->ss.ss_family, SOCK_STREAM, 0)) == -1)
goto bad;
bzero(&lng, sizeof(lng));
if (setsockopt(s, SOL_SOCKET, SO_LINGER, &lng, sizeof(lng)) == -1)
goto bad;
type = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &type, sizeof(type)) == -1)
goto bad;
if (fcntl(s, F_SETFL, O_NONBLOCK) == -1)
goto bad;
if (connect(s, (struct sockaddr *)&cte->host->ss, len) == -1) {
if (errno != EINPROGRESS)
goto bad;
} else {
cte->host->up = HOST_UP;
tcp_host_up(s, cte);
return;
}
bcopy(&cte->table->timeout, &tv, sizeof(tv));
event_once(s, EV_TIMEOUT|EV_WRITE, tcp_write, cte, &tv);
return;
bad:
close(s);
cte->host->up = HOST_DOWN;
hce_notify_done(cte->host, "check_tcp: cannot connect");
}
void
tcp_write(int s, short event, void *arg)
{
struct ctl_tcp_event *cte = arg;
int err;
socklen_t len;
if (event == EV_TIMEOUT) {
log_debug("tcp_write: connect timed out");
cte->host->up = HOST_DOWN;
} else {
len = sizeof(err);
if (getsockopt(s, SOL_SOCKET, SO_ERROR, &err, &len))
fatal("tcp_write: getsockopt");
if (err)
cte->host->up = HOST_DOWN;
else
cte->host->up = HOST_UP;
}
if (cte->host->up == HOST_UP)
tcp_host_up(s, cte);
else {
close(s);
hce_notify_done(cte->host, "connect failed");
}
}
void
tcp_host_up(int s, struct ctl_tcp_event *cte)
{
switch (cte->table->check) {
case CHECK_TCP:
close(s);
hce_notify_done(cte->host, "tcp_write: success");
break;
case CHECK_HTTP_CODE:
case CHECK_HTTP_DIGEST:
send_http_request(cte);
break;
default:
fatalx("tcp_write: unhandled check type");
}
}
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