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annotate src/http/ngx_http_spdy.h @ 5576:2bc609a4b516

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SPDY: fixed reversed priority order in window waiting queue.
author Valentin Bartenev <vbart@nginx.com>
date Wed, 12 Feb 2014 21:02:29 +0400
parents 39d7eef2e332
children 34d460c5d186
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (C) Nginx, Inc.
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3 * Copyright (C) Valentin V. Bartenev
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4 */
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5
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6
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7 #ifndef _NGX_HTTP_SPDY_H_INCLUDED_
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8 #define _NGX_HTTP_SPDY_H_INCLUDED_
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9
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10
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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13 #include <ngx_http.h>
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14
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15 #include <zlib.h>
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16
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17
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18 #define NGX_SPDY_VERSION 3
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19
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20 #define NGX_SPDY_NPN_ADVERTISE "\x08spdy/3.1"
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21 #define NGX_SPDY_NPN_NEGOTIATED "spdy/3.1"
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22
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23 #define NGX_SPDY_STATE_BUFFER_SIZE 16
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24
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25 #define NGX_SPDY_CTL_BIT 1
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26
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27 #define NGX_SPDY_SYN_STREAM 1
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28 #define NGX_SPDY_SYN_REPLY 2
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29 #define NGX_SPDY_RST_STREAM 3
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30 #define NGX_SPDY_SETTINGS 4
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31 #define NGX_SPDY_PING 6
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32 #define NGX_SPDY_GOAWAY 7
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33 #define NGX_SPDY_HEADERS 8
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34 #define NGX_SPDY_WINDOW_UPDATE 9
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35
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36 #define NGX_SPDY_FRAME_HEADER_SIZE 8
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37
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38 #define NGX_SPDY_SID_SIZE 4
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39 #define NGX_SPDY_DELTA_SIZE 4
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40
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41 #define NGX_SPDY_SYN_STREAM_SIZE 10
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42 #define NGX_SPDY_SYN_REPLY_SIZE 4
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43 #define NGX_SPDY_RST_STREAM_SIZE 8
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44 #define NGX_SPDY_PING_SIZE 4
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45 #define NGX_SPDY_GOAWAY_SIZE 8
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46 #define NGX_SPDY_WINDOW_UPDATE_SIZE 8
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47 #define NGX_SPDY_NV_NUM_SIZE 4
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48 #define NGX_SPDY_NV_NLEN_SIZE 4
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49 #define NGX_SPDY_NV_VLEN_SIZE 4
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50 #define NGX_SPDY_SETTINGS_NUM_SIZE 4
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51 #define NGX_SPDY_SETTINGS_FID_SIZE 4
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52 #define NGX_SPDY_SETTINGS_VAL_SIZE 4
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53
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54 #define NGX_SPDY_SETTINGS_PAIR_SIZE \
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55 (NGX_SPDY_SETTINGS_FID_SIZE + NGX_SPDY_SETTINGS_VAL_SIZE)
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56
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57 #define NGX_SPDY_HIGHEST_PRIORITY 0
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58 #define NGX_SPDY_LOWEST_PRIORITY 7
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59
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60 #define NGX_SPDY_FLAG_FIN 0x01
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61 #define NGX_SPDY_FLAG_UNIDIRECTIONAL 0x02
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62 #define NGX_SPDY_FLAG_CLEAR_SETTINGS 0x01
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63
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64 #define NGX_SPDY_MAX_FRAME_SIZE ((1 << 24) - 1)
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65
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66 #define NGX_SPDY_DATA_DISCARD 1
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67 #define NGX_SPDY_DATA_ERROR 2
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68 #define NGX_SPDY_DATA_INTERNAL_ERROR 3
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69
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70
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71 typedef struct ngx_http_spdy_connection_s ngx_http_spdy_connection_t;
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72 typedef struct ngx_http_spdy_out_frame_s ngx_http_spdy_out_frame_t;
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73
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74
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75 typedef u_char *(*ngx_http_spdy_handler_pt) (ngx_http_spdy_connection_t *sc,
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76 u_char *pos, u_char *end);
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77
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78 struct ngx_http_spdy_connection_s {
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79 ngx_connection_t *connection;
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80 ngx_http_connection_t *http_connection;
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81
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82 ngx_uint_t processing;
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83
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84 size_t send_window;
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85 size_t recv_window;
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86 size_t init_window;
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87
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88 ngx_queue_t waiting;
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89
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90 u_char buffer[NGX_SPDY_STATE_BUFFER_SIZE];
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91 size_t buffer_used;
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92 ngx_http_spdy_handler_pt handler;
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93
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94 z_stream zstream_in;
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95 z_stream zstream_out;
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96
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97 ngx_pool_t *pool;
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98
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99 ngx_http_spdy_out_frame_t *free_ctl_frames;
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100 ngx_connection_t *free_fake_connections;
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101
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102 ngx_http_spdy_stream_t **streams_index;
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103
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104 ngx_http_spdy_out_frame_t *last_out;
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105
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106 ngx_queue_t posted;
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107
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108 ngx_http_spdy_stream_t *stream;
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109
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110 ngx_uint_t entries;
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111 size_t length;
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112 u_char flags;
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113
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114 ngx_uint_t last_sid;
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115
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116 unsigned blocked:1;
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117 unsigned incomplete:1;
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118 };
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119
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120
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121 struct ngx_http_spdy_stream_s {
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122 ngx_uint_t id;
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123 ngx_http_request_t *request;
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124 ngx_http_spdy_connection_t *connection;
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125 ngx_http_spdy_stream_t *index;
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126
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127 ngx_uint_t header_buffers;
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128 ngx_uint_t queued;
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129
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130 /*
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131 * A change to SETTINGS_INITIAL_WINDOW_SIZE could cause the
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132 * send_window to become negative, hence it's signed.
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133 */
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134 ssize_t send_window;
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135 size_t recv_window;
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136
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137 ngx_http_spdy_out_frame_t *free_frames;
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138 ngx_chain_t *free_data_headers;
5514
b7ee1bae0ffa SPDY: implemented buffers chain splitting.
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diff changeset
139 ngx_chain_t *free_bufs;
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140
5530
827e53c136b0 SPDY: use ngx_queue_t to queue streams for post processing.
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diff changeset
141 ngx_queue_t queue;
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diff changeset
142
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39d7eef2e332 SPDY: protocol implementation switched to spdy/3.1.
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143 unsigned priority:3;
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144 unsigned handled:1;
5493
916cb6d28f6a SPDY: fixed possible request hang.
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145 unsigned blocked:1;
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39d7eef2e332 SPDY: protocol implementation switched to spdy/3.1.
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146 unsigned exhausted:1;
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147 unsigned in_closed:1;
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diff changeset
148 unsigned out_closed:1;
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diff changeset
149 unsigned skip_data:2;
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diff changeset
150 };
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diff changeset
151
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diff changeset
152
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diff changeset
153 struct ngx_http_spdy_out_frame_s {
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154 ngx_http_spdy_out_frame_t *next;
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diff changeset
155 ngx_chain_t *first;
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diff changeset
156 ngx_chain_t *last;
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diff changeset
157 ngx_int_t (*handler)(ngx_http_spdy_connection_t *sc,
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diff changeset
158 ngx_http_spdy_out_frame_t *frame);
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diff changeset
159
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160 ngx_http_spdy_stream_t *stream;
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e4adaa47af65 SPDY: store the length of frame instead of its whole size.
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diff changeset
161 size_t length;
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diff changeset
162
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163 ngx_uint_t priority;
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diff changeset
164 unsigned blocked:1;
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diff changeset
165 unsigned fin:1;
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diff changeset
166 };
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diff changeset
167
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diff changeset
168
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diff changeset
169 static ngx_inline void
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170 ngx_http_spdy_queue_frame(ngx_http_spdy_connection_t *sc,
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171 ngx_http_spdy_out_frame_t *frame)
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diff changeset
172 {
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173 ngx_http_spdy_out_frame_t **out;
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174
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175 for (out = &sc->last_out; *out; out = &(*out)->next)
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176 {
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177 /*
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178 * NB: higher values represent lower priorities.
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179 */
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180 if (frame->priority >= (*out)->priority) {
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181 break;
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182 }
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183 }
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184
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185 frame->next = *out;
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186 *out = frame;
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187 }
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188
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diff changeset
189
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diff changeset
190 static ngx_inline void
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diff changeset
191 ngx_http_spdy_queue_blocked_frame(ngx_http_spdy_connection_t *sc,
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192 ngx_http_spdy_out_frame_t *frame)
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diff changeset
193 {
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194 ngx_http_spdy_out_frame_t **out;
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diff changeset
195
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620808518349 SPDY: ignore priority when queuing blocked frames.
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196 for (out = &sc->last_out; *out; out = &(*out)->next)
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197 {
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198 if ((*out)->blocked) {
5121
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199 break;
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200 }
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diff changeset
201 }
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diff changeset
202
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diff changeset
203 frame->next = *out;
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diff changeset
204 *out = frame;
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diff changeset
205 }
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diff changeset
206
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diff changeset
207
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diff changeset
208 void ngx_http_spdy_init(ngx_event_t *rev);
5225
15a7deeaa19a Use "void" for functions with empty parameter list.
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diff changeset
209 void ngx_http_spdy_request_headers_init(void);
5121
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210
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diff changeset
211 ngx_int_t ngx_http_spdy_read_request_body(ngx_http_request_t *r,
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parents:
diff changeset
212 ngx_http_client_body_handler_pt post_handler);
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diff changeset
213
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diff changeset
214 void ngx_http_spdy_close_stream(ngx_http_spdy_stream_t *stream, ngx_int_t rc);
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diff changeset
215
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diff changeset
216 ngx_int_t ngx_http_spdy_send_output_queue(ngx_http_spdy_connection_t *sc);
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diff changeset
217
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diff changeset
218
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diff changeset
219 #define ngx_spdy_frame_aligned_write_uint16(p, s) \
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diff changeset
220 (*(uint16_t *) (p) = htons((uint16_t) (s)), (p) + sizeof(uint16_t))
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diff changeset
221
c0f7b94e88ba Preliminary experimental support for SPDY draft 2.
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parents:
diff changeset
222 #define ngx_spdy_frame_aligned_write_uint32(p, s) \
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diff changeset
223 (*(uint32_t *) (p) = htonl((uint32_t) (s)), (p) + sizeof(uint32_t))
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parents:
diff changeset
224
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parents:
diff changeset
225 #if (NGX_HAVE_NONALIGNED)
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parents:
diff changeset
226
c0f7b94e88ba Preliminary experimental support for SPDY draft 2.
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diff changeset
227 #define ngx_spdy_frame_write_uint16 ngx_spdy_frame_aligned_write_uint16
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diff changeset
228 #define ngx_spdy_frame_write_uint32 ngx_spdy_frame_aligned_write_uint32
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diff changeset
229
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parents:
diff changeset
230 #else
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diff changeset
231
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parents:
diff changeset
232 #define ngx_spdy_frame_write_uint16(p, s) \
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parents:
diff changeset
233 ((p)[0] = (u_char) (s) >> 8, (p)[1] = (u_char) (s), (p) + sizeof(uint16_t))
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parents:
diff changeset
234
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parents:
diff changeset
235 #define ngx_spdy_frame_write_uint32(p, s) \
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parents:
diff changeset
236 ((p)[0] = (u_char) (s) >> 24, \
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parents:
diff changeset
237 (p)[1] = (u_char) (s) >> 16, \
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parents:
diff changeset
238 (p)[2] = (u_char) (s) >> 8, \
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parents:
diff changeset
239 (p)[3] = (u_char) (s), (p) + sizeof(uint32_t))
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diff changeset
240
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diff changeset
241 #endif
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parents:
diff changeset
242
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parents:
diff changeset
243
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parents:
diff changeset
244 #define ngx_spdy_ctl_frame_head(t) \
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parents:
diff changeset
245 ((uint32_t) NGX_SPDY_CTL_BIT << 31 | NGX_SPDY_VERSION << 16 | (t))
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parents:
diff changeset
246
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parents:
diff changeset
247 #define ngx_spdy_frame_write_head(p, t) \
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parents:
diff changeset
248 ngx_spdy_frame_aligned_write_uint32(p, ngx_spdy_ctl_frame_head(t))
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parents:
diff changeset
249
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parents:
diff changeset
250 #define ngx_spdy_frame_write_flags_and_len(p, f, l) \
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parents:
diff changeset
251 ngx_spdy_frame_aligned_write_uint32(p, (f) << 24 | (l))
5549
39d7eef2e332 SPDY: protocol implementation switched to spdy/3.1.
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parents: 5545
diff changeset
252 #define ngx_spdy_frame_write_flags_and_id(p, f, i) \
39d7eef2e332 SPDY: protocol implementation switched to spdy/3.1.
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parents: 5545
diff changeset
253 ngx_spdy_frame_aligned_write_uint32(p, (f) << 24 | (i))
5121
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diff changeset
254
5549
39d7eef2e332 SPDY: protocol implementation switched to spdy/3.1.
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diff changeset
255 #define ngx_spdy_frame_write_sid ngx_spdy_frame_aligned_write_uint32
39d7eef2e332 SPDY: protocol implementation switched to spdy/3.1.
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diff changeset
256 #define ngx_spdy_frame_write_window ngx_spdy_frame_aligned_write_uint32
5121
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diff changeset
257
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diff changeset
258 #endif /* _NGX_HTTP_SPDY_H_INCLUDED_ */