mirror of https://git.openwrt.org/project/luci.git
143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) 2009 Jo-Philipp Wich <jow@openwrt.org>
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <syslog.h>
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#include <ctype.h>
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#include <errno.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <math.h>
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#include <time.h>
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#include <signal.h>
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#include <limits.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <linux/types.h>
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#include <linux/watchdog.h>
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#include "ucix.h"
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#include "wireless.22.h"
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/* Watchdog poll interval */
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#define BASE_INTERVAL 5
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/* Action interval (N * BASE_INTERVAL) */
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#define ACTION_INTERVAL 6
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/* Hysteresis */
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#define HYSTERESIS 3
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/* How to call myself in the logs */
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#define SYSLOG_IDENT "Freifunk Watchdog"
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/* Process error action */
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#define PROC_ACTION curr_proc->initscript, curr_proc->initscript, "restart"
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/* Wifi error action */
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#define WIFI_ACTION "/sbin/wifi", "/sbin/wifi"
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/* Watchdog device */
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#define WATCH_DEVICE "/dev/watchdog"
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#define WATCH_SHUTDOWN 'V'
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#define WATCH_KEEPALIVE '\0'
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/* System load error action and threshold */
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#define LOAD_TRESHOLD 15.00
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#define LOAD_ACTION "/sbin/reboot", "/sbin/reboot"
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/* Fallback binary name (passed by makefile) */
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#ifndef BINARY
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#define BINARY "ffwatchd"
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#endif
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/* ifname/bssid/channel tuples */
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struct wifi_tuple {
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char ifname[16];
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char bssid[18];
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int channel;
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struct wifi_tuple *next;
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};
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/* structure to hold tuple-list and uci context during iteration */
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struct uci_wifi_iface_itr_ctx {
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struct wifi_tuple *list;
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struct uci_context *ctx;
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};
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typedef struct wifi_tuple wifi_tuple_t;
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/* process name/exec tuples */
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struct process_tuple {
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char process[PATH_MAX + 1];
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char initscript[PATH_MAX + 1];
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int restart;
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struct process_tuple *next;
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};
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/* structure to hold tuple-list and uci context during iteration */
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struct uci_process_itr_ctx {
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struct process_tuple *list;
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struct uci_context *ctx;
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};
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typedef struct process_tuple process_tuple_t;
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/* ioctl() helper (stolen from iwlib) */
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static inline int
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iw_ioctl(int skfd, /* Socket to the kernel */
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const char * ifname, /* Device name */
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int request, /* WE ID */
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struct iwreq * pwrq) /* Fixed part of the request */
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{
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/* Set device name */
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strncpy(pwrq->ifr_ifrn.ifrn_name, ifname, 16);
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/* Do the request */
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return(ioctl(skfd, request, pwrq));
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}
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/* fork() & execl() helper */
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#define EXEC(x) \
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do { \
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switch(fork()) \
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{ \
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case -1: \
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syslog(LOG_CRIT, "Unable to fork child: %s", \
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strerror(errno)); \
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break; \
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\
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case 0: \
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execl(x, NULL); \
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syslog(LOG_CRIT, "Unable to execute action: %s", \
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strerror(errno)); \
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return 1; \
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} \
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} while(0)
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