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annotate src/http/v3/ngx_http_v3.h @ 7870:e169cce912c7 quic

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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 5649079a41f4
children d2759e4cc437
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1
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2 /*
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3 * Copyright (C) Roman Arutyunyan
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_HTTP_V3_H_INCLUDED_
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9 #define _NGX_HTTP_V3_H_INCLUDED_
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11
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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14 #include <ngx_http.h>
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15 #include <ngx_http_v3_parse.h>
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18 #define NGX_HTTP_V3_ALPN(s) NGX_HTTP_V3_ALPN_DRAFT(s)
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19 #define NGX_HTTP_V3_ALPN_DRAFT(s) "\x05h3-" #s
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20 #define NGX_HTTP_V3_ALPN_ADVERTISE NGX_HTTP_V3_ALPN(NGX_QUIC_DRAFT_VERSION)
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22 #define NGX_HTTP_V3_VARLEN_INT_LEN 4
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23 #define NGX_HTTP_V3_PREFIX_INT_LEN 11
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24
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25 #define NGX_HTTP_V3_STREAM_CONTROL 0x00
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26 #define NGX_HTTP_V3_STREAM_PUSH 0x01
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27 #define NGX_HTTP_V3_STREAM_ENCODER 0x02
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28 #define NGX_HTTP_V3_STREAM_DECODER 0x03
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29
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30 #define NGX_HTTP_V3_FRAME_DATA 0x00
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31 #define NGX_HTTP_V3_FRAME_HEADERS 0x01
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32 #define NGX_HTTP_V3_FRAME_CANCEL_PUSH 0x03
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33 #define NGX_HTTP_V3_FRAME_SETTINGS 0x04
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34 #define NGX_HTTP_V3_FRAME_PUSH_PROMISE 0x05
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35 #define NGX_HTTP_V3_FRAME_GOAWAY 0x07
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36 #define NGX_HTTP_V3_FRAME_MAX_PUSH_ID 0x0d
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37
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38 #define NGX_HTTP_V3_PARAM_MAX_TABLE_CAPACITY 0x01
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39 #define NGX_HTTP_V3_PARAM_MAX_HEADER_LIST_SIZE 0x06
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40 #define NGX_HTTP_V3_PARAM_BLOCKED_STREAMS 0x07
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42 #define NGX_HTTP_V3_STREAM_CLIENT_CONTROL 0
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43 #define NGX_HTTP_V3_STREAM_SERVER_CONTROL 1
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44 #define NGX_HTTP_V3_STREAM_CLIENT_ENCODER 2
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45 #define NGX_HTTP_V3_STREAM_SERVER_ENCODER 3
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46 #define NGX_HTTP_V3_STREAM_CLIENT_DECODER 4
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47 #define NGX_HTTP_V3_STREAM_SERVER_DECODER 5
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48 #define NGX_HTTP_V3_MAX_KNOWN_STREAM 6
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49
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50
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51 typedef struct {
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52 ngx_quic_tp_t quic;
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53 } ngx_http_v3_srv_conf_t;
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54
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56 typedef struct {
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57 ngx_http_connection_t hc;
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58
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59 ngx_array_t *dynamic;
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60 ngx_connection_t *known_streams[NGX_HTTP_V3_MAX_KNOWN_STREAM];
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61 } ngx_http_v3_connection_t;
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62
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64 typedef struct {
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65 ngx_str_t name;
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66 ngx_str_t value;
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67 } ngx_http_v3_header_t;
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68
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70 ngx_int_t ngx_http_v3_parse_header(ngx_http_request_t *r, ngx_buf_t *b);
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71 ngx_int_t ngx_http_v3_parse_request_body(ngx_http_request_t *r, ngx_buf_t *b,
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72 ngx_http_chunked_t *ctx);
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73 ngx_chain_t *ngx_http_v3_create_header(ngx_http_request_t *r);
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74 ngx_chain_t *ngx_http_v3_create_trailers(ngx_http_request_t *r);
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75
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76 uintptr_t ngx_http_v3_encode_varlen_int(u_char *p, uint64_t value);
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77 uintptr_t ngx_http_v3_encode_prefix_int(u_char *p, uint64_t value,
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78 ngx_uint_t prefix);
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79
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80 void ngx_http_v3_handle_client_uni_stream(ngx_connection_t *c);
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81
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82 ngx_int_t ngx_http_v3_ref_insert(ngx_connection_t *c, ngx_uint_t dynamic,
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83 ngx_uint_t index, ngx_str_t *value);
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84 ngx_int_t ngx_http_v3_insert(ngx_connection_t *c, ngx_str_t *name,
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85 ngx_str_t *value);
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86 ngx_int_t ngx_http_v3_set_capacity(ngx_connection_t *c, ngx_uint_t capacity);
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87 ngx_int_t ngx_http_v3_duplicate(ngx_connection_t *c, ngx_uint_t index);
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88 ngx_int_t ngx_http_v3_ack_header(ngx_connection_t *c, ngx_uint_t stream_id);
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89 ngx_int_t ngx_http_v3_cancel_stream(ngx_connection_t *c, ngx_uint_t stream_id);
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90 ngx_int_t ngx_http_v3_inc_insert_count(ngx_connection_t *c, ngx_uint_t inc);
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91 ngx_http_v3_header_t *ngx_http_v3_lookup_table(ngx_connection_t *c,
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92 ngx_uint_t dynamic, ngx_uint_t index);
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93 ngx_int_t ngx_http_v3_check_insert_count(ngx_connection_t *c,
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94 ngx_uint_t insert_count);
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95 ngx_int_t ngx_http_v3_set_param(ngx_connection_t *c, uint64_t id,
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96 uint64_t value);
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97
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98 ngx_int_t ngx_http_v3_client_ref_insert(ngx_connection_t *c, ngx_uint_t dynamic,
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99 ngx_uint_t index, ngx_str_t *value);
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100 ngx_int_t ngx_http_v3_client_insert(ngx_connection_t *c, ngx_str_t *name,
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101 ngx_str_t *value);
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102 ngx_int_t ngx_http_v3_client_set_capacity(ngx_connection_t *c,
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103 ngx_uint_t capacity);
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104 ngx_int_t ngx_http_v3_client_duplicate(ngx_connection_t *c, ngx_uint_t index);
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105 ngx_int_t ngx_http_v3_client_ack_header(ngx_connection_t *c,
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106 ngx_uint_t stream_id);
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107 ngx_int_t ngx_http_v3_client_cancel_stream(ngx_connection_t *c,
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108 ngx_uint_t stream_id);
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109 ngx_int_t ngx_http_v3_client_inc_insert_count(ngx_connection_t *c,
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110 ngx_uint_t inc);
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111
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112
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113 extern ngx_module_t ngx_http_v3_module;
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114
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115
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116 #endif /* _NGX_HTTP_V3_H_INCLUDED_ */