Mercurial > hg > nginx-quic
view src/event/ngx_event_timer.c @ 8084:eece8e35e64d quic
QUIC: allowed old DCID for initial packets until first ACK.
If a packet sent in response to an initial client packet was lost, then
successive client initial packets were dropped by nginx with the unexpected
dcid message logged. This was because the new DCID generated by the server was
not available to the client.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Wed, 09 Sep 2020 16:35:29 +0300 |
parents | 03928f7f209b |
children | 0c5e84096d99 |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> ngx_rbtree_t ngx_event_timer_rbtree; static ngx_rbtree_node_t ngx_event_timer_sentinel; /* * the event timer rbtree may contain the duplicate keys, however, * it should not be a problem, because we use the rbtree to find * a minimum timer value only */ ngx_int_t ngx_event_timer_init(ngx_log_t *log) { ngx_rbtree_init(&ngx_event_timer_rbtree, &ngx_event_timer_sentinel, ngx_rbtree_insert_timer_value); return NGX_OK; } ngx_msec_t ngx_event_find_timer(void) { ngx_msec_int_t timer; ngx_rbtree_node_t *node, *root, *sentinel; if (ngx_event_timer_rbtree.root == &ngx_event_timer_sentinel) { return NGX_TIMER_INFINITE; } root = ngx_event_timer_rbtree.root; sentinel = ngx_event_timer_rbtree.sentinel; node = ngx_rbtree_min(root, sentinel); timer = (ngx_msec_int_t) (node->key - ngx_current_msec); return (ngx_msec_t) (timer > 0 ? timer : 0); } void ngx_event_expire_timers(void) { ngx_event_t *ev; ngx_rbtree_node_t *node, *root, *sentinel; sentinel = ngx_event_timer_rbtree.sentinel; for ( ;; ) { root = ngx_event_timer_rbtree.root; if (root == sentinel) { return; } node = ngx_rbtree_min(root, sentinel); /* node->key > ngx_current_msec */ if ((ngx_msec_int_t) (node->key - ngx_current_msec) > 0) { return; } ev = (ngx_event_t *) ((char *) node - offsetof(ngx_event_t, timer)); ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, "event timer del: %d: %M", ngx_event_ident(ev->data), ev->timer.key); ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer); #if (NGX_DEBUG) ev->timer.left = NULL; ev->timer.right = NULL; ev->timer.parent = NULL; #endif ev->timer_set = 0; ev->timedout = 1; ev->handler(ev); } } ngx_int_t ngx_event_no_timers_left(void) { ngx_event_t *ev; ngx_rbtree_node_t *node, *root, *sentinel; sentinel = ngx_event_timer_rbtree.sentinel; root = ngx_event_timer_rbtree.root; if (root == sentinel) { return NGX_OK; } for (node = ngx_rbtree_min(root, sentinel); node; node = ngx_rbtree_next(&ngx_event_timer_rbtree, node)) { ev = (ngx_event_t *) ((char *) node - offsetof(ngx_event_t, timer)); if (!ev->cancelable) { return NGX_AGAIN; } } /* only cancelable timers left */ return NGX_OK; }