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comparison src/event/ngx_event_quic_transport.c @ 8594:ee06a813756c quic

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QUIC: teach how to compute only the length of created QUIC headers. It will be used for precise expansion of UDP datagram payload.
author Sergey Kandaurov <pluknet@nginx.com>
date Wed, 21 Oct 2020 12:03:23 +0100
parents d8a0bb1e85bf
children 38c7dd720774
comparison
equal deleted inserted replaced
8593:d8a0bb1e85bf 8594:ee06a813756c
418 ngx_quic_create_long_header(ngx_quic_header_t *pkt, u_char *out, 418 ngx_quic_create_long_header(ngx_quic_header_t *pkt, u_char *out,
419 size_t pkt_len, u_char **pnp) 419 size_t pkt_len, u_char **pnp)
420 { 420 {
421 u_char *p, *start; 421 u_char *p, *start;
422 422
423 if (out == NULL) {
424 return 5 + 2 + pkt->dcid.len + pkt->scid.len
425 + ngx_quic_varint_len(pkt_len + pkt->num_len) + pkt->num_len
426 + (pkt->level == ssl_encryption_initial ? 1 : 0);
427 }
428
423 p = start = out; 429 p = start = out;
424 430
425 *p++ = pkt->flags; 431 *p++ = pkt->flags;
426 432
427 p = ngx_quic_write_uint32(p, NGX_QUIC_VERSION); 433 p = ngx_quic_write_uint32(p, NGX_QUIC_VERSION);
462 size_t 468 size_t
463 ngx_quic_create_short_header(ngx_quic_header_t *pkt, u_char *out, 469 ngx_quic_create_short_header(ngx_quic_header_t *pkt, u_char *out,
464 size_t pkt_len, u_char **pnp) 470 size_t pkt_len, u_char **pnp)
465 { 471 {
466 u_char *p, *start; 472 u_char *p, *start;
473
474 if (out == NULL) {
475 return 1 + pkt->dcid.len + pkt->num_len;
476 }
467 477
468 p = start = out; 478 p = start = out;
469 479
470 *p++ = pkt->flags; 480 *p++ = pkt->flags;
471 481