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https://github.com/Theldus/alertik.git
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Setup proper static events with env vars too
This commit is contained in:
parent
17c7f129e3
commit
770e95dd04
10
alertik.c
10
alertik.c
@ -49,13 +49,11 @@ int main(void)
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pthread_t handler;
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int fd;
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/* TODO: remove setup_notifiers()..
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* think about env vars for the static events too, like enable/disable
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*/
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log_init();
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setup_notifiers();
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init_environment_events();
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if (!init_static_events() && !init_environment_events())
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panic("No event was configured, please configure at least one\n"
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"before proceeding!\n");
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log_msg(
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"Alertik (" GIT_HASH ") (built at " __DATE__ " " __TIME__ ")\n");
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13
env_events.c
13
env_events.c
@ -147,8 +147,13 @@ int process_environment_event(struct log_event *ev)
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return handled;
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}
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/**/
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/**
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* @brief Initialize environment variables events.
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*
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* @return Returns 0 if there is no environment event,
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* 1 if there is at least one _and_ is successfully
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* configured.
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*/
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int init_environment_events(void)
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{
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char *tmp;
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@ -163,7 +168,7 @@ int init_environment_events(void)
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panic("Environment ENV_EVENTS exceeds the maximum supported (%d/%d)\n",
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num_env_events, MAX_ENV_EVENTS);
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log_msg("%d environment events found, registering...\n");
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log_msg("%d environment event(s) found, registering...\n");
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for (int i = 0; i < num_env_events; i++) {
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/* EVENTn_MATCH_TYPE. */
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env_events[i].ev_match_type = get_event_idx(i, "MATCH_TYPE",
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@ -193,5 +198,5 @@ int init_environment_events(void)
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/* Try to setup notifier if not yet. */
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notifiers[env_events[i].ev_notifier_idx].setup();
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}
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return (0);
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return 1;
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}
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106
events.c
106
events.c
@ -3,12 +3,17 @@
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* This is free and unencumbered software released into the public domain.
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*/
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "events.h"
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#include "alertik.h"
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#include "notifiers.h"
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#include "log.h"
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void handle_wifi_login_attempts(struct log_event *ev);
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static void handle_wifi_login_attempts(struct log_event *, int);
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/* Handlers. */
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struct ev_handler handlers[NUM_EVENTS] = {
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@ -16,11 +21,36 @@ struct ev_handler handlers[NUM_EVENTS] = {
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{
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.str = "unicast key exchange timeout",
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.hnd = handle_wifi_login_attempts,
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.evnt_type = EVNT_SUBSTR
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.evnt_type = EVNT_SUBSTR,
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.enabled = 0,
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.evnt_notifier_idx = NOTIFY_IDX_TELE
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},
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/* Add new handlers here. */
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};
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/**/
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static char *get_event_str(long ev_num, char *str)
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{
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char *env;
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char ev[64] = {0};
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snprintf(ev, sizeof ev - 1, "STATIC_EVENT%ld_%s", ev_num, str);
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if (!(env = getenv(ev)))
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panic("Unable to find event for %s\n", ev);
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return env;
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}
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/**/
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static int
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get_event_idx(long ev_num, char *str, const char *const *str_list, int size)
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{
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char *env = get_event_str(ev_num, str);
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for (int i = 0; i < size; i++) {
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if (!strcmp(env, str_list[i]))
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return i;
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}
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panic("String parameter (%s) invalid for %s\n", env, str);
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}
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/**
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* @brief Given an event, checks if it belongs to one of the
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* registered events and then, handle it.
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@ -36,13 +66,77 @@ int process_static_event(struct log_event *ev)
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for (i = 0, handled = 0; i < NUM_EVENTS; i++) {
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if (strstr(ev->msg, handlers[i].str)) {
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handlers[i].hnd(ev);
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handlers[i].hnd(ev, i);
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handled += 1;
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}
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}
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return handled;
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}
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/**
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* @brief Initialize static events.
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*
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* @return Returns 0 if there is no static event, and 1 if
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* there is at least one _and_ is successfully configured.
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*/
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int init_static_events(void)
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{
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char *ptr, *end;
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long ev;
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/* Check for: STATIC_EVENTS_ENABLED=0,3,5,2... */
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ptr = getenv("STATIC_EVENTS_ENABLED");
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if (!ptr || ptr[0] == '\0') {
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log_msg("Static events not detected, disabling...\n");
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return (0);
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}
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end = ptr;
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errno = 0;
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do
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{
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ev = strtol(end, &end, 10);
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if (errno != 0 || ((ptr == end) && ev == 0))
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panic("Unable to parse STATIC_EVENTS_ENABLED, aborting...\n");
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/* Skip whitespaces. */
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while (*end != '\0' && isspace(*end))
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end++;
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/* Check if ev number is sane. */
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if (ev < 0 || ev >= NUM_EVENTS)
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panic("Event (%ld) is not valid!, should be between 0-%d\n",
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ev, NUM_EVENTS - 1);
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/* Try to retrieve & initialize notifier for the event. */
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handlers[ev].evnt_notifier_idx =
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get_event_idx(ev, "NOTIFIER", notifiers_str, NUM_NOTIFIERS);
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handlers[ev].enabled = 1;
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if (*end != ',' && *end != '\0')
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panic("Wrong event number in STATIC_EVENTS_ENABLED, aborting...\n");
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} while (*end++ != '\0');
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log_msg("Static events summary:\n");
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for (int i = 0; i < NUM_EVENTS; i++) {
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if (!handlers[i].enabled)
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continue;
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printf(
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"STATIC_EVENT%d : enabled\n"
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"STATIC_EVENT%d_NOTIFIER: %s\n\n",
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i, i, notifiers_str[handlers[i].evnt_notifier_idx]
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);
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/* Try to setup notifier if not yet. */
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notifiers[handlers[i].evnt_notifier_idx].setup();
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}
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return 1;
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}
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///////////////////////////// FAILED LOGIN ATTEMPTS ///////////////////////////
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static int
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@ -79,12 +173,13 @@ parse_login_attempt_msg(const char *msg, char *wifi_iface, char *mac_addr)
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return (0);
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}
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void handle_wifi_login_attempts(struct log_event *ev)
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static void handle_wifi_login_attempts(struct log_event *ev, int idx_env)
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{
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char time_str[32] = {0};
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char mac_addr[32] = {0};
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char wifi_iface[32] = {0};
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char notification_message[2048] = {0};
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int notif_idx;
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log_msg("> Login attempt detected!\n");
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@ -104,7 +199,8 @@ void handle_wifi_login_attempts(struct log_event *ev)
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log_msg("> Retrieved info, MAC: (%s), Interface: (%s)\n", mac_addr, wifi_iface);
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if (send_telegram_notification(notification_message) < 0) {
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notif_idx = handlers[idx_env].evnt_notifier_idx;
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if (notifiers[notif_idx].send_notification(notification_message) < 0) {
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log_msg("unable to send the notification!\n");
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return;
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}
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9
events.h
9
events.h
@ -21,12 +21,15 @@
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};
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struct ev_handler {
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const char *str;
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void(*hnd)(struct log_event *);
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int evnt_type;
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const char *str; /* Substr or regex to match. */
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void(*hnd)(struct log_event *, int); /* Event handler. */
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int evnt_type; /* Whether substr or regex. */
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int evnt_notifier_idx; /* Telegram, Discord... */
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int enabled; /* Whether if handler enabled or not. */
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};
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extern struct ev_handler handlers[NUM_EVENTS];
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extern int process_static_event(struct log_event *ev);
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extern int init_static_events(void);
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#endif /* EVENTS_H */
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.send_notification = send_telegram_notification
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}
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};
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/* Global setup. */
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void setup_notifiers(void)
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{
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for (int i = 0; i < NUM_NOTIFIERS; i++)
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notifiers[i].setup();
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}
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// #define VALIDATE_CERTS
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// #define DISABLE_NOTIFICATIONS
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/*
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* Notifier indexes.
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*/
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#define NOTIFY_IDX_TELE 0
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#define CURL_USER_AGENT "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 " \
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"(KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36"
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@ -34,7 +39,6 @@
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};
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extern struct notifier notifiers[NUM_NOTIFIERS];
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extern void setup_notifiers(void);
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extern int is_within_notify_threshold(void);
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extern void update_notify_last_sent(void);
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