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QUIC: reschedule path validation on path insertion/removal.

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Two issues fixed:
- new path validation could be scheduled late
- a validated path could leave a spurious timer
This commit is contained in:
Sergey Kandaurov 2023-05-09 19:42:40 +04:00
parent 894679804b
commit 12fa86dd92
1 changed files with 45 additions and 3 deletions
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48
src/event/quic/ngx_event_quic_migration.c
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@ -16,6 +16,7 @@ static ngx_int_t ngx_quic_validate_path(ngx_connection_t *c,
ngx_quic_path_t *path);
static ngx_int_t ngx_quic_send_path_challenge(ngx_connection_t *c,
ngx_quic_path_t *path);
static void ngx_quic_set_path_timer(ngx_connection_t *c);
static ngx_quic_path_t *ngx_quic_get_path(ngx_connection_t *c, ngx_uint_t tag);
@ -169,6 +170,8 @@ valid:
path->validating = 0;
path->limited = 0;
ngx_quic_set_path_timer(c);
return NGX_OK;
}
@ -515,9 +518,7 @@ ngx_quic_validate_path(ngx_connection_t *c, ngx_quic_path_t *path)
path->expires = ngx_current_msec + pto;
if (!qc->path_validation.timer_set) {
ngx_add_timer(&qc->path_validation, pto);
}
ngx_quic_set_path_timer(c);
return NGX_OK;
}
@ -563,6 +564,47 @@ ngx_quic_send_path_challenge(ngx_connection_t *c, ngx_quic_path_t *path)
}
static void
ngx_quic_set_path_timer(ngx_connection_t *c)
{
ngx_msec_t now;
ngx_queue_t *q;
ngx_msec_int_t left, next;
ngx_quic_path_t *path;
ngx_quic_connection_t *qc;
qc = ngx_quic_get_connection(c);
now = ngx_current_msec;
next = -1;
for (q = ngx_queue_head(&qc->paths);
q != ngx_queue_sentinel(&qc->paths);
q = ngx_queue_next(q))
{
path = ngx_queue_data(q, ngx_quic_path_t, queue);
if (!path->validating) {
continue;
}
left = path->expires - now;
left = ngx_max(left, 1);
if (next == -1 || left < next) {
next = left;
}
}
if (next != -1) {
ngx_add_timer(&qc->path_validation, next);
} else if (qc->path_validation.timer_set) {
ngx_del_timer(&qc->path_validation);
}
}
void
ngx_quic_path_validation_handler(ngx_event_t *ev)
{