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annotate src/http/ngx_http_spdy.h @ 5509:877a7bd72070

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SPDY: better name for flag that indicates incomplete frame state. No functional changes.
author Valentin Bartenev <vbart@nginx.com>
date Tue, 14 Jan 2014 16:24:45 +0400
parents 9053fdcea4b7
children b7ee1bae0ffa
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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 2
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19
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20 #ifdef TLSEXT_TYPE_next_proto_neg
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21 #define NGX_SPDY_NPN_ADVERTISE "\x06spdy/2"
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22 #define NGX_SPDY_NPN_NEGOTIATED "spdy/2"
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23 #endif
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24
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25 #define NGX_SPDY_STATE_BUFFER_SIZE 16
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26
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27 #define NGX_SPDY_CTL_BIT 1
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28
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29 #define NGX_SPDY_SYN_STREAM 1
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30 #define NGX_SPDY_SYN_REPLY 2
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31 #define NGX_SPDY_RST_STREAM 3
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32 #define NGX_SPDY_SETTINGS 4
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33 #define NGX_SPDY_NOOP 5
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34 #define NGX_SPDY_PING 6
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35 #define NGX_SPDY_GOAWAY 7
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36 #define NGX_SPDY_HEADERS 8
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37
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38 #define NGX_SPDY_FRAME_HEADER_SIZE 8
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39
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40 #define NGX_SPDY_SID_SIZE 4
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41
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42 #define NGX_SPDY_SYN_STREAM_SIZE 10
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43 #define NGX_SPDY_SYN_REPLY_SIZE 6
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44 #define NGX_SPDY_RST_STREAM_SIZE 8
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45 #define NGX_SPDY_PING_SIZE 4
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46 #define NGX_SPDY_GOAWAY_SIZE 4
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47 #define NGX_SPDY_NV_NUM_SIZE 2
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48 #define NGX_SPDY_NV_NLEN_SIZE 2
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49 #define NGX_SPDY_NV_VLEN_SIZE 2
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50 #define NGX_SPDY_SETTINGS_NUM_SIZE 4
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51 #define NGX_SPDY_SETTINGS_IDF_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_IDF_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 3
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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 u_char buffer[NGX_SPDY_STATE_BUFFER_SIZE];
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85 size_t buffer_used;
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86 ngx_http_spdy_handler_pt handler;
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87
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88 z_stream zstream_in;
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89 z_stream zstream_out;
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90
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91 ngx_pool_t *pool;
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92
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93 ngx_http_spdy_out_frame_t *free_ctl_frames;
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94 ngx_connection_t *free_fake_connections;
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95
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96 ngx_http_spdy_stream_t **streams_index;
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97
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98 ngx_http_spdy_out_frame_t *last_out;
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99 ngx_http_spdy_stream_t *last_stream;
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100
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101 ngx_http_spdy_stream_t *stream;
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102
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103 ngx_uint_t headers;
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104 size_t length;
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105 u_char flags;
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106
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107 ngx_uint_t last_sid;
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108
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109 unsigned blocked:1;
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110 unsigned incomplete:1;
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111 };
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112
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113
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114 struct ngx_http_spdy_stream_s {
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115 ngx_uint_t id;
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116 ngx_http_request_t *request;
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117 ngx_http_spdy_connection_t *connection;
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118 ngx_http_spdy_stream_t *index;
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119 ngx_http_spdy_stream_t *next;
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120
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121 ngx_uint_t header_buffers;
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122 ngx_uint_t queued;
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123
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124 ngx_http_spdy_out_frame_t *free_frames;
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125 ngx_chain_t *free_data_headers;
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126
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127 unsigned priority:2;
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128 unsigned handled:1;
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129 unsigned blocked:1;
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130 unsigned in_closed:1;
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131 unsigned out_closed:1;
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132 unsigned skip_data:2;
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133 };
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134
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135
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136 struct ngx_http_spdy_out_frame_s {
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137 ngx_http_spdy_out_frame_t *next;
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138 ngx_chain_t *first;
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139 ngx_chain_t *last;
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140 ngx_int_t (*handler)(ngx_http_spdy_connection_t *sc,
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141 ngx_http_spdy_out_frame_t *frame);
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142
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143 ngx_http_spdy_out_frame_t *free;
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144
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145 ngx_http_spdy_stream_t *stream;
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146 size_t size;
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147
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148 ngx_uint_t priority;
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149 unsigned blocked:1;
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150 unsigned fin:1;
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151 };
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152
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153
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154 static ngx_inline void
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155 ngx_http_spdy_queue_frame(ngx_http_spdy_connection_t *sc,
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156 ngx_http_spdy_out_frame_t *frame)
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157 {
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158 ngx_http_spdy_out_frame_t **out;
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159
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160 for (out = &sc->last_out; *out; out = &(*out)->next)
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161 {
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162 if (frame->priority >= (*out)->priority) {
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163 break;
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164 }
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165 }
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166
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167 frame->next = *out;
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168 *out = frame;
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169 }
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170
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171
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172 static ngx_inline void
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173 ngx_http_spdy_queue_blocked_frame(ngx_http_spdy_connection_t *sc,
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174 ngx_http_spdy_out_frame_t *frame)
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175 {
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176 ngx_http_spdy_out_frame_t **out;
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177
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178 for (out = &sc->last_out; *out; out = &(*out)->next)
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179 {
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180 if ((*out)->blocked) {
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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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189
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190 void ngx_http_spdy_init(ngx_event_t *rev);
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191 void ngx_http_spdy_request_headers_init(void);
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192
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193 ngx_int_t ngx_http_spdy_read_request_body(ngx_http_request_t *r,
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194 ngx_http_client_body_handler_pt post_handler);
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195
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196 void ngx_http_spdy_close_stream(ngx_http_spdy_stream_t *stream, ngx_int_t rc);
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197
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198 ngx_int_t ngx_http_spdy_send_output_queue(ngx_http_spdy_connection_t *sc);
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199
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200
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201 #define ngx_spdy_frame_aligned_write_uint16(p, s) \
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202 (*(uint16_t *) (p) = htons((uint16_t) (s)), (p) + sizeof(uint16_t))
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203
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204 #define ngx_spdy_frame_aligned_write_uint32(p, s) \
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205 (*(uint32_t *) (p) = htonl((uint32_t) (s)), (p) + sizeof(uint32_t))
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206
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207 #if (NGX_HAVE_NONALIGNED)
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208
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209 #define ngx_spdy_frame_write_uint16 ngx_spdy_frame_aligned_write_uint16
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210 #define ngx_spdy_frame_write_uint32 ngx_spdy_frame_aligned_write_uint32
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211
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212 #else
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213
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214 #define ngx_spdy_frame_write_uint16(p, s) \
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215 ((p)[0] = (u_char) (s) >> 8, (p)[1] = (u_char) (s), (p) + sizeof(uint16_t))
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216
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217 #define ngx_spdy_frame_write_uint32(p, s) \
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218 ((p)[0] = (u_char) (s) >> 24, \
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219 (p)[1] = (u_char) (s) >> 16, \
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220 (p)[2] = (u_char) (s) >> 8, \
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221 (p)[3] = (u_char) (s), (p) + sizeof(uint32_t))
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222
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223 #endif
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224
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225
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226 #define ngx_spdy_ctl_frame_head(t) \
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227 ((uint32_t) NGX_SPDY_CTL_BIT << 31 | NGX_SPDY_VERSION << 16 | (t))
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228
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229 #define ngx_spdy_frame_write_head(p, t) \
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230 ngx_spdy_frame_aligned_write_uint32(p, ngx_spdy_ctl_frame_head(t))
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diff changeset
231
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232 #define ngx_spdy_frame_write_flags_and_len(p, f, l) \
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233 ngx_spdy_frame_aligned_write_uint32(p, (f) << 24 | (l))
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234
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235 #define ngx_spdy_frame_write_sid ngx_spdy_frame_aligned_write_uint32
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236
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237 #endif /* _NGX_HTTP_SPDY_H_INCLUDED_ */