From 5f55d9d4d14635678e7f582215e3642de2e232a4 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Mon, 6 May 2024 02:08:31 +0200
Subject: new ecp directory and vconn server

---
 ecp/server/timer.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 ecp/server/timer.c

(limited to 'ecp/server/timer.c')

diff --git a/ecp/server/timer.c b/ecp/server/timer.c
new file mode 100644
index 0000000..ab30633
--- /dev/null
+++ b/ecp/server/timer.c
@@ -0,0 +1,98 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+
+#include <ecp/core.h>
+
+#include "dir.h"
+
+#include "server.h"
+#include "timer.h"
+
+static struct timespec timer_ts_mono;
+static timer_t timer_ann_block_id;
+static timer_t timer_online_switch_id;
+
+int timer_set_next(time_t tv_now) {
+    struct itimerspec its = { 0 };
+    time_t tv_midnight;
+    int rv = 0;
+
+    /* next midnight */
+    tv_midnight = (tv_now / ONLINE_SWITCH_PERIOD) * ONLINE_SWITCH_PERIOD + ONLINE_SWITCH_PERIOD;
+
+    if (tv_now < (tv_midnight - ANN_BLOCK_TIME)) {
+        dir_announce_allow();
+
+        its.it_value.tv_sec = tv_midnight - ANN_BLOCK_TIME;
+        rv = timer_settime(timer_ann_block_id, TIMER_ABSTIME, &its, NULL);
+        if (rv) return ECP_ERR;
+    } else {
+        dir_announce_block();
+    }
+
+    its.it_value.tv_sec = tv_midnight;
+    rv = timer_settime(timer_online_switch_id, TIMER_ABSTIME, &its, NULL);
+    if (rv) return ECP_ERR;
+
+    return ECP_OK;
+}
+
+void timer_ann_block(union sigval timer_data) {
+    dir_announce_block();
+}
+
+void timer_online_switch(union sigval timer_data) {
+    ECPSocket *sock = timer_data.sival_ptr;
+    struct timespec ts_prev;
+    int rv;
+
+    ts_prev = timer_ts_mono;
+    clock_gettime(CLOCK_MONOTONIC, &timer_ts_mono);
+
+    /* exit if someone is messing with realtime clock */
+    if ((timer_ts_mono.tv_sec - ts_prev.tv_sec) < (ONLINE_SWITCH_PERIOD / 2)) goto online_switch_fin;
+
+    dir_online_switch(sock, 1);
+
+online_switch_fin:
+    rv = timer_set_next(time(NULL));
+    if (rv) LOG(LOG_ERR, "timer_online_switch: set next timer err:%d\n", rv);
+}
+
+int timer_init(ECPSocket *sock) {
+    struct sigevent timer_ann_block_evt = { 0 };
+    struct sigevent timer_online_switch_evt = { 0 };
+    time_t tv_now;
+    int rv = 0;
+
+    timer_ann_block_evt.sigev_notify = SIGEV_THREAD;
+    timer_ann_block_evt.sigev_notify_function = timer_ann_block;
+    timer_ann_block_evt.sigev_value.sival_ptr = NULL;
+    rv = timer_create(CLOCK_REALTIME, &timer_ann_block_evt, &timer_ann_block_id);
+    if (rv) return ECP_ERR;
+
+    timer_online_switch_evt.sigev_notify = SIGEV_THREAD;
+    timer_online_switch_evt.sigev_notify_function = timer_online_switch;
+    timer_online_switch_evt.sigev_value.sival_ptr = sock;
+    rv = timer_create(CLOCK_REALTIME, &timer_online_switch_evt, &timer_online_switch_id);
+    if (rv) {
+        timer_delete(timer_ann_block_id);
+        return ECP_ERR;
+    }
+
+    /* ensure that first dir_online_switch is executed */
+    clock_gettime(CLOCK_MONOTONIC, &timer_ts_mono);
+    timer_ts_mono.tv_sec -= ONLINE_SWITCH_PERIOD / 2;
+
+    tv_now = time(NULL);
+    dit_init_serial(tv_now / ONLINE_SWITCH_PERIOD);
+    rv = timer_set_next(tv_now);
+    if (rv) {
+        timer_delete(timer_ann_block_id);
+        timer_delete(timer_online_switch_id);
+        return rv;
+    }
+
+    return ECP_OK;
+}
-- 
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