2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
16 * Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
33 #include <sys/ioctl.h>
34 #include <sys/socket.h>
35 #include <linux/types.h>
36 #include <linux/watchdog.h>
39 #include "wireless.22.h"
42 /* Watchdog poll interval */
43 #define BASE_INTERVAL 5
45 /* Action interval (N * BASE_INTERVAL) */
46 #define ACTION_INTERVAL 6
51 /* How to call myself in the logs */
52 #define SYSLOG_IDENT "Freifunk Watchdog"
54 /* Wifi error action */
55 #define WIFI_ACTION "/sbin/wifi", "/sbin/wifi"
57 /* Crond error action */
58 #define CRON_ACTION "/etc/init.d/cron", "/etc/init.d/cron", "restart"
60 /* SSHd error action */
61 #define SSHD_ACTION "/etc/init.d/dropbear", "/etc/init.d/dropbear", "restart"
64 #define WATCH_DEVICE "/dev/watchdog"
65 #define WATCH_SHUTDOWN 'V'
66 #define WATCH_KEEPALIVE '\0'
68 /* System load error action and treshold */
69 #define LOAD_TRESHOLD 5.00
70 #define LOAD_ACTION "/sbin/reboot"
72 /* Fallback binary name (passed by makefile) */
74 #define BINARY "ffwatchd"
78 /* ifname/bssid/channel tuples */
83 struct wifi_tuple *next;
86 /* structure to hold tuple-list and uci context during iteration */
88 struct wifi_tuple *list;
89 struct uci_context *ctx;
92 typedef struct wifi_tuple wifi_tuple_t;
95 /* ioctl() helper (stolen from iwlib) */
97 iw_ioctl(int skfd, /* Socket to the kernel */
98 const char * ifname, /* Device name */
99 int request, /* WE ID */
100 struct iwreq * pwrq) /* Fixed part of the request */
102 /* Set device name */
103 strncpy(pwrq->ifr_ifrn.ifrn_name, ifname, 16);
106 return(ioctl(skfd, request, pwrq));
109 /* fork() & execl() helper */
115 syslog(LOG_CRIT, "Unable to fork child: %s", \
122 syslog(LOG_CRIT, "Unable to execute action: %s", \