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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2007 - 2013 Red Hat, Inc.
*/
#include "nm-default.h"
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#define NM_DHCP_CLIENT_DBUS_IFACE "org.freedesktop.nm_dhcp_client"
static const char * ignore[] = {"PATH", "SHLVL", "_", "PWD", "dhc_dbus", NULL};
static GVariant *
build_signal_parameters (void)
{
char **item;
GVariantBuilder builder;
g_variant_builder_init (&builder, G_VARIANT_TYPE_VARDICT);
/* List environment and format for dbus dict */
for (item = environ; *item; item++) {
char *name, *val, **p;
/* Split on the = */
name = g_strdup (*item);
val = strchr (name, '=');
if (!val || val == name)
goto next;
*val++ = '\0';
/* Ignore non-DCHP-related environment variables */
for (p = (char **) ignore; *p; p++) {
if (strncmp (name, *p, strlen (*p)) == 0)
goto next;
}
/* Value passed as a byte array rather than a string, because there are
* no character encoding guarantees with DHCP, and D-Bus requires
* strings to be UTF-8.
*
* Note that we can't use g_variant_new_bytestring() here, because that
* includes the trailing '\0'. (??!?)
*/
g_variant_builder_add (&builder, "{sv}",
name,
g_variant_new_fixed_array (G_VARIANT_TYPE_BYTE,
val, strlen (val), 1));
next:
g_free (name);
}
return g_variant_new ("(a{sv})", &builder);
}
static void
kill_pid (void)
{
const char *pid_str;
pid_t pid = 0;
pid_str = getenv ("pid");
if (pid_str)
pid = strtol (pid_str, NULL, 10);
if (pid) {
g_printerr ("Fatal error occured, killing dhclient instance with pid %d.\n", pid);
kill (pid, SIGTERM);
}
}
int
main (int argc, char *argv[])
{
gs_unref_object GDBusConnection *connection = NULL;
gs_free_error GError *error = NULL;
gboolean success = FALSE;
nm_g_type_init ();
connection = g_dbus_connection_new_for_address_sync ("unix:path=" NMRUNDIR "/private-dhcp",
G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT,
NULL, NULL, &error);
if (!connection) {
g_dbus_error_strip_remote_error (error);
g_printerr ("Error: could not connect to NetworkManager D-Bus socket: %s\n",
error->message);
goto out;
}
if (!g_dbus_connection_emit_signal (connection,
NULL,
"/",
NM_DHCP_CLIENT_DBUS_IFACE,
"Event",
build_signal_parameters (),
&error)) {
g_dbus_error_strip_remote_error (error);
g_printerr ("Error: Could not send DHCP Event signal: %s\n", error->message);
goto out;
}
if (!g_dbus_connection_flush_sync (connection, NULL, &error)) {
g_dbus_error_strip_remote_error (error);
g_printerr ("Error: Could not flush D-Bus connection: %s\n", error->message);
goto out;
}
success = TRUE;
out:
if (!success)
kill_pid ();
return success ? EXIT_SUCCESS : EXIT_FAILURE;
}
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