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Limited max udp payload size for outgoing packets.

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This allows to avoid problems with packet fragmentation in real networks.
This is a temporary workaround.
This commit is contained in:
Vladimir Homutov 2020-06-10 21:37:08 +03:00
parent 5cef58452d
commit 64c00708fa
2 changed files with 9 additions and 1 deletions
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8
src/event/ngx_event_quic.c
View File

@ -430,6 +430,12 @@ ngx_quic_add_handshake_data(ngx_ssl_conn_t *ssl_conn,
return 0;
}
if (qc->ctp.max_udp_payload_size > NGX_QUIC_MAX_UDP_PAYLOAD_OUT) {
qc->ctp.max_udp_payload_size = NGX_QUIC_MAX_UDP_PAYLOAD_OUT;
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic client maximum packet size truncated");
}
#if (NGX_QUIC_DRAFT_VERSION >= 28)
if (qc->scid.len != qc->ctp.initial_scid.len
|| ngx_memcmp(qc->scid.data, qc->ctp.initial_scid.data,
@ -640,7 +646,7 @@ ngx_quic_new_connection(ngx_connection_t *c, ngx_ssl_t *ssl, ngx_quic_tp_t *tp,
qc->streams.handler = handler;
ctp = &qc->ctp;
ctp->max_udp_payload_size = NGX_QUIC_MAX_UDP_PAYLOAD_SIZE;
ctp->max_udp_payload_size = NGX_QUIC_MAX_UDP_PAYLOAD_OUT;
ctp->ack_delay_exponent = NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT;
ctp->max_ack_delay = NGX_QUIC_DEFAULT_MAX_ACK_DELAY;

2
src/event/ngx_event_quic.h
View File

@ -23,6 +23,8 @@
/* 1 flags + 4 version + 2 x (1 + 20) s/dcid + 4 pn + 4 len + token len */
#define NGX_QUIC_MAX_UDP_PAYLOAD_SIZE 65527
#define NGX_QUIC_MAX_UDP_PAYLOAD_OUT 1300 /* TODO */
#define NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT 3
#define NGX_QUIC_DEFAULT_MAX_ACK_DELAY 25