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QUIC: simplified packet header parsing.

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Now flags are processed in ngx_quic_input(), and raw->pos points to the first
byte after the flags. Redundant checks from ngx_quic_parse_short_header() and
ngx_quic_parse_long_header() are removed.
This commit is contained in:
Vladimir Homutov 2020-09-25 21:47:28 +03:00
parent 80958b29a2
commit fe626bda84
2 changed files with 3 additions and 26 deletions
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1
src/event/ngx_event_quic.c
View File

@ -1623,6 +1623,7 @@ ngx_quic_input(ngx_connection_t *c, ngx_buf_t *b)
pkt.len = b->last - p; pkt.len = b->last - p;
pkt.log = c->log; pkt.log = c->log;
pkt.flags = p[0]; pkt.flags = p[0];
pkt.raw->pos++;
if (c->quic->in_retry) { if (c->quic->in_retry) {
rc = ngx_quic_retry_input(c, &pkt); rc = ngx_quic_retry_input(c, &pkt);

28
src/event/ngx_event_quic_transport.c
View File

@ -250,21 +250,9 @@ ngx_quic_parse_long_header(ngx_quic_header_t *pkt)
u_char *p, *end; u_char *p, *end;
uint8_t idlen; uint8_t idlen;
p = pkt->data; p = pkt->raw->pos;
end = pkt->data + pkt->len; end = pkt->data + pkt->len;
p = ngx_quic_read_uint8(p, end, &pkt->flags);
if (p == NULL) {
ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
"quic packet is too small to read flags");
return NGX_ERROR;
}
if (!ngx_quic_long_pkt(pkt->flags)) {
ngx_log_error(NGX_LOG_INFO, pkt->log, 0, "quic not a long packet");
return NGX_ERROR;
}
p = ngx_quic_read_uint32(p, end, &pkt->version); p = ngx_quic_read_uint32(p, end, &pkt->version);
if (p == NULL) { if (p == NULL) {
ngx_log_error(NGX_LOG_INFO, pkt->log, 0, ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
@ -473,21 +461,9 @@ ngx_quic_parse_short_header(ngx_quic_header_t *pkt, ngx_str_t *dcid)
{ {
u_char *p, *end; u_char *p, *end;
p = pkt->data; p = pkt->raw->pos;
end = pkt->data + pkt->len; end = pkt->data + pkt->len;
p = ngx_quic_read_uint8(p, end, &pkt->flags);
if (p == NULL) {
ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
"quic packet is too small to read flags");
return NGX_ERROR;
}
if (!ngx_quic_short_pkt(pkt->flags)) {
ngx_log_error(NGX_LOG_INFO, pkt->log, 0, "quic not a short packet");
return NGX_ERROR;
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pkt->log, 0, ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pkt->log, 0,
"quic short packet flags:%xd", pkt->flags); "quic short packet flags:%xd", pkt->flags);