Mercurial > hg > nginx-quic
view src/os/unix/ngx_send.c @ 7870:e169cce912c7 quic
Avoid retransmitting of packets with discarded keys.
Sections 4.10.1 and 4.10.2 of quic transport describe discarding of initial
and handshake keys. Since the keys are discarded, we no longer need
to retransmit packets and corresponding queues should be emptied.
This patch removes previously added workaround that did not require
acknowledgement for initial packets, resulting in avoiding retransmission,
which is wrong because a packet could be lost and we have to retransmit it.
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Mon, 18 May 2020 13:54:53 +0300 |
parents | f01ab2dbcfdc |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> ssize_t ngx_unix_send(ngx_connection_t *c, u_char *buf, size_t size) { ssize_t n; ngx_err_t err; ngx_event_t *wev; wev = c->write; #if (NGX_HAVE_KQUEUE) if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { (void) ngx_connection_error(c, wev->kq_errno, "kevent() reported about an closed connection"); wev->error = 1; return NGX_ERROR; } #endif for ( ;; ) { n = send(c->fd, buf, size, 0); ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "send: fd:%d %z of %uz", c->fd, n, size); if (n > 0) { if (n < (ssize_t) size) { wev->ready = 0; } c->sent += n; return n; } err = ngx_socket_errno; if (n == 0) { ngx_log_error(NGX_LOG_ALERT, c->log, err, "send() returned zero"); wev->ready = 0; return n; } if (err == NGX_EAGAIN || err == NGX_EINTR) { wev->ready = 0; ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, "send() not ready"); if (err == NGX_EAGAIN) { return NGX_AGAIN; } } else { wev->error = 1; (void) ngx_connection_error(c, err, "send() failed"); return NGX_ERROR; } } }