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/*
* route_up.c - wake events for route changes
* Copyright (c) 2013 The Chromium Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#include <event2/event.h>
#include "src/conf.h"
#include "src/routeup.h"
#include "src/tlsdate.h"
#include "src/util.h"
void action_stdin_wakeup (evutil_socket_t fd, short what, void *arg)
{
struct state *state = arg;
char buf[1];
verb_debug ("[event:%s] fired", __func__);
if (what != EV_READ)
return;
if (IGNORE_EINTR (read (fd, buf, sizeof (buf))) != sizeof (buf))
{
error ("[event:%s] unregistering stdin handler - it's broken!",
__func__);
event_del (state->events[E_ROUTEUP]);
return;
}
action_kickoff_time_sync (-1, EV_TIMEOUT, arg);
}
void action_netlink_ready (evutil_socket_t fd, short what, void *arg)
{
struct routeup routeup_cfg;
verb_debug ("[event:%s] fired", __func__);
routeup_cfg.netlinkfd = fd;
if (what & EV_READ)
{
if (routeup_process (&routeup_cfg) == 0)
{
verb_debug ("[event:%s] routes changed", __func__);
/* Fire off a proxy resolution attempt and a new sync request */
action_kickoff_time_sync (-1, EV_TIMEOUT, arg);
}
}
}
int setup_event_route_up (struct state *state)
{
event_callback_fn handler;
int fd = -1;
struct routeup routeup_cfg;
if (state->opts.should_netlink)
{
if (routeup_setup (&routeup_cfg))
{
error ("routeup_setup() failed");
return 1;
}
fd = routeup_cfg.netlinkfd;
handler = action_netlink_ready;
}
else /* Listen for cues from stdin */
{
fd = STDIN_FILENO;
if (fcntl (fd, F_SETFL, O_NONBLOCK) < 0)
{
perror ("stdin fcntl(O_NONBLOCK) failed");
return 1;
}
handler = action_stdin_wakeup;
}
state->events[E_ROUTEUP] = event_new (state->base, fd,
EV_READ|EV_PERSIST, handler, state);
if (!state->events[E_ROUTEUP])
{
if (state->opts.should_netlink)
{
routeup_teardown (&routeup_cfg);
}
return 1;
}
event_priority_set (state->events[E_ROUTEUP], PRI_WAKE);
event_add (state->events[E_ROUTEUP], NULL);
return 0;
}
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