Mercurial > hg > nginx
annotate src/http/v3/ngx_http_v3_streams.c @ 8283:dadbc66e9fca quic
Simplifed handling HTTP/3 streams.
| author | Roman Arutyunyan <arut@nginx.com> |
|---|---|
| date | Wed, 25 Mar 2020 12:14:24 +0300 |
| parents | 618a65de08b3 |
| children | 44cac24aaa44 |
| rev | line source |
|---|---|
| 8215 | 1 |
| 2 /* | |
| 3 * Copyright (C) Roman Arutyunyan | |
| 4 * Copyright (C) Nginx, Inc. | |
| 5 */ | |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_http.h> | |
| 11 | |
| 12 | |
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13 typedef ngx_int_t (*ngx_http_v3_handler_pt)(ngx_connection_t *c, void *data, |
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14 u_char ch); |
| 8215 | 15 |
| 16 | |
| 17 typedef struct { | |
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18 ngx_http_v3_handler_pt handler; |
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19 void *data; |
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20 ngx_int_t index; |
| 8215 | 21 } ngx_http_v3_uni_stream_t; |
| 22 | |
| 23 | |
| 24 static void ngx_http_v3_close_uni_stream(ngx_connection_t *c); | |
| 25 static void ngx_http_v3_read_uni_stream_type(ngx_event_t *rev); | |
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26 static void ngx_http_v3_uni_read_handler(ngx_event_t *rev); |
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27 static void ngx_http_v3_dummy_write_handler(ngx_event_t *wev); |
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28 static ngx_connection_t *ngx_http_v3_get_uni_stream(ngx_connection_t *c, |
| 8215 | 29 ngx_uint_t type); |
| 30 | |
| 31 | |
| 32 void | |
| 33 ngx_http_v3_handle_client_uni_stream(ngx_connection_t *c) | |
| 34 { | |
| 35 ngx_http_v3_uni_stream_t *us; | |
| 36 | |
| 37 c->log->connection = c->number; | |
| 38 | |
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39 ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_CONTROL); |
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40 ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_ENCODER); |
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41 ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_DECODER); |
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42 |
| 8215 | 43 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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44 "http3 new uni stream id:0x%uxL", c->qs->id); |
| 8215 | 45 |
| 46 us = ngx_pcalloc(c->pool, sizeof(ngx_http_v3_uni_stream_t)); | |
| 47 if (us == NULL) { | |
| 48 ngx_http_v3_close_uni_stream(c); | |
| 49 return; | |
| 50 } | |
| 51 | |
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52 us->index = -1; |
| 8215 | 53 |
| 54 c->data = us; | |
| 55 | |
| 56 c->read->handler = ngx_http_v3_read_uni_stream_type; | |
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57 c->write->handler = ngx_http_v3_dummy_write_handler; |
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58 |
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59 ngx_http_v3_read_uni_stream_type(c->read); |
| 8215 | 60 } |
| 61 | |
| 62 | |
| 63 static void | |
| 64 ngx_http_v3_close_uni_stream(ngx_connection_t *c) | |
| 65 { | |
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66 ngx_pool_t *pool; |
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67 ngx_http_v3_connection_t *h3c; |
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68 ngx_http_v3_uni_stream_t *us; |
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69 |
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70 us = c->data; |
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71 h3c = c->qs->parent->data; |
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72 |
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73 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 close stream"); |
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74 |
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75 if (us->index >= 0) { |
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76 h3c->known_streams[us->index] = NULL; |
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77 } |
| 8215 | 78 |
| 79 c->destroyed = 1; | |
| 80 | |
| 81 pool = c->pool; | |
| 82 | |
| 83 ngx_close_connection(c); | |
| 84 | |
| 85 ngx_destroy_pool(pool); | |
| 86 } | |
| 87 | |
| 88 | |
| 89 static void | |
| 90 ngx_http_v3_read_uni_stream_type(ngx_event_t *rev) | |
| 91 { | |
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92 u_char ch; |
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93 ssize_t n; |
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94 ngx_int_t index; |
| 8215 | 95 ngx_connection_t *c; |
| 96 ngx_http_v3_connection_t *h3c; | |
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97 ngx_http_v3_uni_stream_t *us; |
| 8215 | 98 |
| 99 c = rev->data; | |
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100 us = c->data; |
| 8215 | 101 h3c = c->qs->parent->data; |
| 102 | |
| 103 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 read stream type"); | |
| 104 | |
| 105 while (rev->ready) { | |
| 106 | |
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107 n = c->recv(c, &ch, 1); |
| 8215 | 108 |
| 109 if (n == NGX_ERROR) { | |
| 110 goto failed; | |
| 111 } | |
| 112 | |
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113 if (n == NGX_AGAIN || n != 1) { |
| 8215 | 114 break; |
| 115 } | |
| 116 | |
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117 switch (ch) { |
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118 |
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119 case NGX_HTTP_V3_STREAM_ENCODER: |
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120 |
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121 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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122 "http3 encoder stream"); |
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123 |
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124 index = NGX_HTTP_V3_STREAM_CLIENT_ENCODER; |
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125 us->handler = ngx_http_v3_parse_encoder; |
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126 n = sizeof(ngx_http_v3_parse_encoder_t); |
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127 |
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128 break; |
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129 |
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130 case NGX_HTTP_V3_STREAM_DECODER: |
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131 |
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132 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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133 "http3 decoder stream"); |
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134 |
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135 index = NGX_HTTP_V3_STREAM_CLIENT_DECODER; |
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136 us->handler = ngx_http_v3_parse_decoder; |
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137 n = sizeof(ngx_http_v3_parse_decoder_t); |
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138 |
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139 break; |
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140 |
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141 case NGX_HTTP_V3_STREAM_CONTROL: |
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142 |
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143 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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144 "http3 control stream"); |
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145 |
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146 index = NGX_HTTP_V3_STREAM_CLIENT_CONTROL; |
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147 us->handler = ngx_http_v3_parse_control; |
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148 n = sizeof(ngx_http_v3_parse_control_t); |
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149 |
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150 break; |
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151 |
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152 default: |
| 8215 | 153 |
| 154 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
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155 "http3 stream 0x%02xi", (ngx_int_t) ch); |
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156 index = -1; |
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157 n = 0; |
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158 } |
| 8215 | 159 |
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160 if (index >= 0) { |
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161 if (h3c->known_streams[index]) { |
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162 ngx_log_error(NGX_LOG_INFO, c->log, 0, "stream exists"); |
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163 goto failed; |
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164 } |
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165 |
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166 us->index = index; |
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167 h3c->known_streams[index] = c; |
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168 } |
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169 |
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170 if (n) { |
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171 us->data = ngx_pcalloc(c->pool, n); |
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172 if (us->data == NULL) { |
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173 goto failed; |
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174 } |
| 8215 | 175 } |
| 176 | |
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177 rev->handler = ngx_http_v3_uni_read_handler; |
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178 ngx_http_v3_uni_read_handler(rev); |
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179 return; |
| 8215 | 180 } |
| 181 | |
| 182 if (ngx_handle_read_event(rev, 0) != NGX_OK) { | |
| 183 goto failed; | |
| 184 } | |
| 185 | |
| 186 return; | |
| 187 | |
| 188 failed: | |
| 189 | |
| 190 ngx_http_v3_close_uni_stream(c); | |
| 191 } | |
| 192 | |
| 193 | |
| 194 static void | |
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195 ngx_http_v3_uni_read_handler(ngx_event_t *rev) |
| 8215 | 196 { |
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197 u_char buf[128]; |
| 8215 | 198 ssize_t n; |
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199 ngx_int_t rc, i; |
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200 ngx_connection_t *c; |
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201 ngx_http_v3_uni_stream_t *us; |
| 8215 | 202 |
| 203 c = rev->data; | |
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204 us = c->data; |
| 8215 | 205 |
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206 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 read handler"); |
| 8215 | 207 |
| 208 while (rev->ready) { | |
| 209 | |
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210 n = c->recv(c, buf, sizeof(buf)); |
| 8215 | 211 |
| 212 if (n == NGX_ERROR || n == 0) { | |
| 213 goto failed; | |
| 214 } | |
| 215 | |
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216 if (n == NGX_AGAIN) { |
| 8215 | 217 break; |
| 218 } | |
| 219 | |
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220 if (us->handler == NULL) { |
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221 continue; |
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222 } |
| 8215 | 223 |
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224 for (i = 0; i < n; i++) { |
| 8215 | 225 |
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226 rc = us->handler(c, us->data, buf[i]); |
| 8215 | 227 |
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228 if (rc == NGX_ERROR) { |
| 8215 | 229 goto failed; |
| 230 } | |
| 231 | |
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232 if (rc == NGX_DONE) { |
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233 goto done; |
| 8215 | 234 } |
| 235 | |
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236 /* rc == NGX_AGAIN */ |
| 8215 | 237 } |
| 238 } | |
| 239 | |
| 240 if (ngx_handle_read_event(rev, 0) != NGX_OK) { | |
| 241 goto failed; | |
| 242 } | |
| 243 | |
| 244 return; | |
| 245 | |
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246 done: |
| 8215 | 247 |
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248 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 read done"); |
| 8215 | 249 |
| 250 failed: | |
| 251 | |
| 252 ngx_http_v3_close_uni_stream(c); | |
| 253 } | |
| 254 | |
| 255 | |
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256 static void |
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257 ngx_http_v3_dummy_write_handler(ngx_event_t *wev) |
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258 { |
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259 ngx_connection_t *c; |
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260 |
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261 c = wev->data; |
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262 |
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263 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 dummy write handler"); |
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264 |
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265 if (ngx_handle_write_event(wev, 0) != NGX_OK) { |
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266 ngx_http_v3_close_uni_stream(c); |
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267 } |
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268 } |
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269 |
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270 |
| 8215 | 271 /* XXX async & buffered stream writes */ |
| 272 | |
| 273 static ngx_connection_t * | |
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274 ngx_http_v3_get_uni_stream(ngx_connection_t *c, ngx_uint_t type) |
| 8215 | 275 { |
| 276 u_char buf[NGX_HTTP_V3_VARLEN_INT_LEN]; | |
| 277 size_t n; | |
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278 ngx_int_t index; |
| 8215 | 279 ngx_connection_t *sc; |
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280 ngx_http_v3_connection_t *h3c; |
| 8215 | 281 ngx_http_v3_uni_stream_t *us; |
| 282 | |
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283 switch (type) { |
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284 case NGX_HTTP_V3_STREAM_ENCODER: |
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285 index = NGX_HTTP_V3_STREAM_SERVER_ENCODER; |
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286 break; |
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287 case NGX_HTTP_V3_STREAM_DECODER: |
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288 index = NGX_HTTP_V3_STREAM_SERVER_DECODER; |
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289 break; |
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290 case NGX_HTTP_V3_STREAM_CONTROL: |
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291 index = NGX_HTTP_V3_STREAM_SERVER_CONTROL; |
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292 break; |
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293 default: |
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294 index = -1; |
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|
295 } |
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|
296 |
|
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297 h3c = c->qs->parent->data; |
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298 |
|
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299 if (index >= 0) { |
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300 if (h3c->known_streams[index]) { |
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301 return h3c->known_streams[index]; |
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|
302 } |
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|
303 } |
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|
304 |
|
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|
305 sc = ngx_quic_create_uni_stream(c); |
| 8215 | 306 if (sc == NULL) { |
| 307 return NULL; | |
| 308 } | |
| 309 | |
| 310 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 311 "http3 create uni stream, type:%ui", type); | |
| 312 | |
| 313 us = ngx_pcalloc(sc->pool, sizeof(ngx_http_v3_uni_stream_t)); | |
| 314 if (us == NULL) { | |
| 315 goto failed; | |
| 316 } | |
| 317 | |
|
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|
318 us->index = index; |
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|
319 |
| 8215 | 320 sc->data = us; |
| 321 | |
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322 sc->read->handler = ngx_http_v3_uni_read_handler; |
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|
323 sc->write->handler = ngx_http_v3_dummy_write_handler; |
|
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|
324 |
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|
325 h3c->known_streams[index] = sc; |
| 8215 | 326 |
| 327 n = (u_char *) ngx_http_v3_encode_varlen_int(buf, type) - buf; | |
| 328 | |
| 329 if (sc->send(sc, buf, n) != (ssize_t) n) { | |
| 330 goto failed; | |
| 331 } | |
| 332 | |
| 333 return sc; | |
| 334 | |
| 335 failed: | |
| 336 | |
| 337 ngx_http_v3_close_uni_stream(sc); | |
| 338 | |
| 339 return NULL; | |
| 340 } | |
| 341 | |
| 342 | |
| 343 ngx_int_t | |
| 344 ngx_http_v3_client_ref_insert(ngx_connection_t *c, ngx_uint_t dynamic, | |
| 345 ngx_uint_t index, ngx_str_t *value) | |
| 346 { | |
| 347 u_char *p, buf[NGX_HTTP_V3_PREFIX_INT_LEN * 2]; | |
| 348 size_t n; | |
| 349 ngx_connection_t *ec; | |
| 350 | |
| 351 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 352 "http3 client ref insert, %s[%ui] \"%V\"", | |
| 353 dynamic ? "dynamic" : "static", index, value); | |
| 354 | |
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|
355 ec = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_ENCODER); |
| 8215 | 356 if (ec == NULL) { |
| 357 return NGX_ERROR; | |
| 358 } | |
| 359 | |
| 360 p = buf; | |
| 361 | |
| 362 *p = (dynamic ? 0x80 : 0xc0); | |
| 363 p = (u_char *) ngx_http_v3_encode_prefix_int(p, index, 6); | |
| 364 | |
| 365 /* XXX option for huffman? */ | |
| 366 *p = 0; | |
| 367 p = (u_char *) ngx_http_v3_encode_prefix_int(p, value->len, 7); | |
| 368 | |
| 369 n = p - buf; | |
| 370 | |
| 371 if (ec->send(ec, buf, n) != (ssize_t) n) { | |
| 372 goto failed; | |
| 373 } | |
| 374 | |
| 375 if (ec->send(ec, value->data, value->len) != (ssize_t) value->len) { | |
| 376 goto failed; | |
| 377 } | |
| 378 | |
| 379 return NGX_OK; | |
| 380 | |
| 381 failed: | |
| 382 | |
| 383 ngx_http_v3_close_uni_stream(ec); | |
| 384 | |
| 385 return NGX_ERROR; | |
| 386 } | |
| 387 | |
| 388 | |
| 389 ngx_int_t | |
| 390 ngx_http_v3_client_insert(ngx_connection_t *c, ngx_str_t *name, | |
| 391 ngx_str_t *value) | |
| 392 { | |
| 393 u_char buf[NGX_HTTP_V3_PREFIX_INT_LEN]; | |
| 394 size_t n; | |
| 395 ngx_connection_t *ec; | |
| 396 | |
| 397 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 398 "http3 client insert \"%V\":\"%V\"", name, value); | |
| 399 | |
|
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|
400 ec = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_ENCODER); |
| 8215 | 401 if (ec == NULL) { |
| 402 return NGX_ERROR; | |
| 403 } | |
| 404 | |
| 405 /* XXX option for huffman? */ | |
| 406 buf[0] = 0x40; | |
| 407 n = (u_char *) ngx_http_v3_encode_prefix_int(buf, name->len, 5) - buf; | |
| 408 | |
| 409 if (ec->send(ec, buf, n) != (ssize_t) n) { | |
| 410 goto failed; | |
| 411 } | |
| 412 | |
| 413 if (ec->send(ec, name->data, name->len) != (ssize_t) name->len) { | |
| 414 goto failed; | |
| 415 } | |
| 416 | |
| 417 /* XXX option for huffman? */ | |
| 418 buf[0] = 0; | |
| 419 n = (u_char *) ngx_http_v3_encode_prefix_int(buf, value->len, 7) - buf; | |
| 420 | |
| 421 if (ec->send(ec, buf, n) != (ssize_t) n) { | |
| 422 goto failed; | |
| 423 } | |
| 424 | |
| 425 if (ec->send(ec, value->data, value->len) != (ssize_t) value->len) { | |
| 426 goto failed; | |
| 427 } | |
| 428 | |
| 429 return NGX_OK; | |
| 430 | |
| 431 failed: | |
| 432 | |
| 433 ngx_http_v3_close_uni_stream(ec); | |
| 434 | |
| 435 return NGX_ERROR; | |
| 436 } | |
| 437 | |
| 438 | |
| 439 ngx_int_t | |
| 440 ngx_http_v3_client_set_capacity(ngx_connection_t *c, ngx_uint_t capacity) | |
| 441 { | |
| 442 u_char buf[NGX_HTTP_V3_PREFIX_INT_LEN]; | |
| 443 size_t n; | |
| 444 ngx_connection_t *ec; | |
| 445 | |
| 446 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 447 "http3 client set capacity %ui", capacity); | |
| 448 | |
|
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|
449 ec = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_ENCODER); |
| 8215 | 450 if (ec == NULL) { |
| 451 return NGX_ERROR; | |
| 452 } | |
| 453 | |
| 454 buf[0] = 0x20; | |
| 455 n = (u_char *) ngx_http_v3_encode_prefix_int(buf, capacity, 5) - buf; | |
| 456 | |
| 457 if (ec->send(ec, buf, n) != (ssize_t) n) { | |
| 458 ngx_http_v3_close_uni_stream(ec); | |
| 459 return NGX_ERROR; | |
| 460 } | |
| 461 | |
| 462 return NGX_OK; | |
| 463 } | |
| 464 | |
| 465 | |
| 466 ngx_int_t | |
| 467 ngx_http_v3_client_duplicate(ngx_connection_t *c, ngx_uint_t index) | |
| 468 { | |
| 469 u_char buf[NGX_HTTP_V3_PREFIX_INT_LEN]; | |
| 470 size_t n; | |
| 471 ngx_connection_t *ec; | |
| 472 | |
| 473 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 474 "http3 client duplicate %ui", index); | |
| 475 | |
|
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|
476 ec = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_ENCODER); |
| 8215 | 477 if (ec == NULL) { |
| 478 return NGX_ERROR; | |
| 479 } | |
| 480 | |
| 481 buf[0] = 0; | |
| 482 n = (u_char *) ngx_http_v3_encode_prefix_int(buf, index, 5) - buf; | |
| 483 | |
| 484 if (ec->send(ec, buf, n) != (ssize_t) n) { | |
| 485 ngx_http_v3_close_uni_stream(ec); | |
| 486 return NGX_ERROR; | |
| 487 } | |
| 488 | |
| 489 return NGX_OK; | |
| 490 } | |
| 491 | |
| 492 | |
| 493 ngx_int_t | |
| 494 ngx_http_v3_client_ack_header(ngx_connection_t *c, ngx_uint_t stream_id) | |
| 495 { | |
| 496 u_char buf[NGX_HTTP_V3_PREFIX_INT_LEN]; | |
| 497 size_t n; | |
| 498 ngx_connection_t *dc; | |
| 499 | |
| 500 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 501 "http3 client ack header %ui", stream_id); | |
| 502 | |
|
8283
dadbc66e9fca
Simplifed handling HTTP/3 streams.
Roman Arutyunyan <arut@nginx.com>
parents:
8281
diff
changeset
|
503 dc = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_DECODER); |
| 8215 | 504 if (dc == NULL) { |
| 505 return NGX_ERROR; | |
| 506 } | |
| 507 | |
| 508 buf[0] = 0x80; | |
| 509 n = (u_char *) ngx_http_v3_encode_prefix_int(buf, stream_id, 7) - buf; | |
| 510 | |
| 511 if (dc->send(dc, buf, n) != (ssize_t) n) { | |
| 512 ngx_http_v3_close_uni_stream(dc); | |
| 513 return NGX_ERROR; | |
| 514 } | |
| 515 | |
| 516 return NGX_OK; | |
| 517 } | |
| 518 | |
| 519 | |
| 520 ngx_int_t | |
| 521 ngx_http_v3_client_cancel_stream(ngx_connection_t *c, ngx_uint_t stream_id) | |
| 522 { | |
| 523 u_char buf[NGX_HTTP_V3_PREFIX_INT_LEN]; | |
| 524 size_t n; | |
| 525 ngx_connection_t *dc; | |
| 526 | |
| 527 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 528 "http3 client cancel stream %ui", stream_id); | |
| 529 | |
|
8283
dadbc66e9fca
Simplifed handling HTTP/3 streams.
Roman Arutyunyan <arut@nginx.com>
parents:
8281
diff
changeset
|
530 dc = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_DECODER); |
| 8215 | 531 if (dc == NULL) { |
| 532 return NGX_ERROR; | |
| 533 } | |
| 534 | |
| 535 buf[0] = 0x40; | |
| 536 n = (u_char *) ngx_http_v3_encode_prefix_int(buf, stream_id, 6) - buf; | |
| 537 | |
| 538 if (dc->send(dc, buf, n) != (ssize_t) n) { | |
| 539 ngx_http_v3_close_uni_stream(dc); | |
| 540 return NGX_ERROR; | |
| 541 } | |
| 542 | |
| 543 return NGX_OK; | |
| 544 } | |
| 545 | |
| 546 | |
| 547 ngx_int_t | |
| 548 ngx_http_v3_client_inc_insert_count(ngx_connection_t *c, ngx_uint_t inc) | |
| 549 { | |
| 550 u_char buf[NGX_HTTP_V3_PREFIX_INT_LEN]; | |
| 551 size_t n; | |
| 552 ngx_connection_t *dc; | |
| 553 | |
| 554 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 555 "http3 client increment insert count %ui", inc); | |
| 556 | |
|
8283
dadbc66e9fca
Simplifed handling HTTP/3 streams.
Roman Arutyunyan <arut@nginx.com>
parents:
8281
diff
changeset
|
557 dc = ngx_http_v3_get_uni_stream(c, NGX_HTTP_V3_STREAM_DECODER); |
| 8215 | 558 if (dc == NULL) { |
| 559 return NGX_ERROR; | |
| 560 } | |
| 561 | |
| 562 buf[0] = 0; | |
| 563 n = (u_char *) ngx_http_v3_encode_prefix_int(buf, inc, 6) - buf; | |
| 564 | |
| 565 if (dc->send(dc, buf, n) != (ssize_t) n) { | |
| 566 ngx_http_v3_close_uni_stream(dc); | |
| 567 return NGX_ERROR; | |
| 568 } | |
| 569 | |
| 570 return NGX_OK; | |
| 571 } |