Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 1 | /* |
| 2 | * libwebsockets - small server side websockets and web server implementation |
| 3 | * |
| 4 | * Copyright (C) 2010-2013 Andy Green <andy@warmcat.com> |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation: |
| 9 | * version 2.1 of the License. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 19 | * MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | |
| 23 | #include "private-libwebsockets.h" |
| 24 | |
| 25 | const struct http2_settings lws_http2_default_settings = { { |
| 26 | 0, |
| 27 | /* LWS_HTTP2_SETTINGS__HEADER_TABLE_SIZE */ 4096, |
| 28 | /* LWS_HTTP2_SETTINGS__ENABLE_PUSH */ 1, |
| 29 | /* LWS_HTTP2_SETTINGS__MAX_CONCURRENT_STREAMS */ 100, |
| 30 | /* LWS_HTTP2_SETTINGS__INITIAL_WINDOW_SIZE */ 65535, |
| 31 | /* LWS_HTTP2_SETTINGS__MAX_FRAME_SIZE */ 16384, |
| 32 | /* LWS_HTTP2_SETTINGS__MAX_HEADER_LIST_SIZE */ ~0, |
| 33 | }}; |
| 34 | |
Andy Green | ecc2e72 | 2014-10-09 16:57:47 +0800 | [diff] [blame] | 35 | |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 36 | void lws_http2_init(struct http2_settings *settings) |
| 37 | { |
| 38 | memcpy(settings, lws_http2_default_settings.setting, sizeof(*settings)); |
| 39 | } |
| 40 | |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 41 | struct lws * |
| 42 | lws_http2_wsi_from_id(struct lws *wsi, unsigned int sid) |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 43 | { |
| 44 | do { |
| 45 | if (wsi->u.http2.my_stream_id == sid) |
| 46 | return wsi; |
| 47 | |
| 48 | wsi = wsi->u.http2.next_child_wsi; |
| 49 | } while (wsi); |
| 50 | |
| 51 | return NULL; |
| 52 | } |
| 53 | |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 54 | struct lws * |
| 55 | lws_create_server_child_wsi(struct lws_context *context, struct lws *parent_wsi, unsigned int sid) |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 56 | { |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 57 | struct lws *wsi = lws_create_new_server_wsi(context); |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 58 | |
| 59 | if (!wsi) |
| 60 | return NULL; |
| 61 | |
| 62 | /* no more children allowed by parent */ |
| 63 | if (parent_wsi->u.http2.child_count + 1 == parent_wsi->u.http2.peer_settings.setting[LWS_HTTP2_SETTINGS__MAX_CONCURRENT_STREAMS]) |
| 64 | return NULL; |
| 65 | |
| 66 | lws_http2_init(&wsi->u.http2.peer_settings); |
| 67 | lws_http2_init(&wsi->u.http2.my_settings); |
| 68 | wsi->u.http2.stream_id = sid; |
Andy Green | 2add634 | 2014-10-12 08:38:16 +0800 | [diff] [blame] | 69 | wsi->u.http2.my_stream_id = sid; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 70 | |
| 71 | wsi->u.http2.parent_wsi = parent_wsi; |
| 72 | wsi->u.http2.next_child_wsi = parent_wsi->u.http2.next_child_wsi; |
| 73 | parent_wsi->u.http2.next_child_wsi = wsi; |
| 74 | parent_wsi->u.http2.child_count++; |
| 75 | |
| 76 | wsi->u.http2.my_priority = 16; |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 77 | wsi->u.http2.tx_credit = 65535; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 78 | |
| 79 | wsi->state = WSI_STATE_HTTP2_ESTABLISHED; |
| 80 | wsi->mode = parent_wsi->mode; |
Andy Green | 7df53c5 | 2014-10-22 15:37:28 +0800 | [diff] [blame] | 81 | |
| 82 | wsi->protocol = &context->protocols[0]; |
Andy Green | 3ef579b | 2015-12-04 09:23:56 +0800 | [diff] [blame] | 83 | lws_ensure_user_space(wsi); |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 84 | |
Andy Green | 7df53c5 | 2014-10-22 15:37:28 +0800 | [diff] [blame] | 85 | lwsl_info("%s: %p new child %p, sid %d, user_space=%p\n", __func__, parent_wsi, wsi, sid, wsi->user_space); |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 86 | |
| 87 | return wsi; |
| 88 | } |
| 89 | |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 90 | int lws_remove_server_child_wsi(struct lws_context *context, struct lws *wsi) |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 91 | { |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 92 | struct lws **w = &wsi->u.http2.parent_wsi; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 93 | do { |
| 94 | if (*w == wsi) { |
| 95 | *w = wsi->u.http2.next_child_wsi; |
| 96 | (wsi->u.http2.parent_wsi)->u.http2.child_count--; |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | w = &((*w)->u.http2.next_child_wsi); |
| 101 | } while (*w); |
| 102 | |
| 103 | lwsl_err("%s: can't find %p\n", __func__, wsi); |
| 104 | return 1; |
| 105 | } |
| 106 | |
| 107 | int |
| 108 | lws_http2_interpret_settings_payload(struct http2_settings *settings, unsigned char *buf, int len) |
| 109 | { |
| 110 | unsigned int a, b; |
| 111 | |
| 112 | if (!len) |
| 113 | return 0; |
| 114 | |
| 115 | if (len < LWS_HTTP2_SETTINGS_LENGTH) |
| 116 | return 1; |
| 117 | |
| 118 | while (len >= LWS_HTTP2_SETTINGS_LENGTH) { |
| 119 | a = (buf[0] << 8) | buf[1]; |
| 120 | if (a < LWS_HTTP2_SETTINGS__COUNT) { |
| 121 | b = buf[2] << 24 | buf[3] << 16 | buf[4] << 8 | buf[5]; |
| 122 | settings->setting[a] = b; |
| 123 | lwsl_info("http2 settings %d <- 0x%x\n", a, b); |
| 124 | } |
| 125 | len -= LWS_HTTP2_SETTINGS_LENGTH; |
| 126 | buf += LWS_HTTP2_SETTINGS_LENGTH; |
| 127 | } |
| 128 | |
| 129 | if (len) |
| 130 | return 1; |
| 131 | |
| 132 | return 0; |
| 133 | } |
| 134 | |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 135 | struct lws *lws_http2_get_network_wsi(struct lws *wsi) |
Andy Green | 200f385 | 2014-10-18 12:23:05 +0800 | [diff] [blame] | 136 | { |
| 137 | while (wsi->u.http2.parent_wsi) |
| 138 | wsi = wsi->u.http2.parent_wsi; |
| 139 | |
| 140 | return wsi; |
| 141 | } |
| 142 | |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 143 | int lws_http2_frame_write(struct lws *wsi, int type, int flags, unsigned int sid, unsigned int len, unsigned char *buf) |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 144 | { |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 145 | struct lws *wsi_eff = lws_http2_get_network_wsi(wsi); |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 146 | unsigned char *p = &buf[-LWS_HTTP2_FRAME_HEADER_LENGTH]; |
| 147 | int n; |
| 148 | |
| 149 | *p++ = len >> 16; |
| 150 | *p++ = len >> 8; |
| 151 | *p++ = len; |
| 152 | *p++ = type; |
| 153 | *p++ = flags; |
| 154 | *p++ = sid >> 24; |
| 155 | *p++ = sid >> 16; |
| 156 | *p++ = sid >> 8; |
| 157 | *p++ = sid; |
| 158 | |
Andy Green | 2add634 | 2014-10-12 08:38:16 +0800 | [diff] [blame] | 159 | lwsl_info("%s: %p (eff %p). type %d, flags 0x%x, sid=%d, len=%d\n", |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 160 | __func__, wsi, wsi_eff, type, flags, sid, len, wsi->u.http2.tx_credit); |
| 161 | |
| 162 | if (type == LWS_HTTP2_FRAME_TYPE_DATA) { |
| 163 | if (wsi->u.http2.tx_credit < len) |
| 164 | lwsl_err("%s: %p: sending payload len %d but tx_credit only %d!\n", len, wsi->u.http2.tx_credit); |
| 165 | wsi->u.http2.tx_credit -= len; |
| 166 | } |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 167 | |
Andy Green | 2add634 | 2014-10-12 08:38:16 +0800 | [diff] [blame] | 168 | n = lws_issue_raw(wsi_eff, &buf[-LWS_HTTP2_FRAME_HEADER_LENGTH], len + LWS_HTTP2_FRAME_HEADER_LENGTH); |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 169 | if (n >= LWS_HTTP2_FRAME_HEADER_LENGTH) |
| 170 | return n - LWS_HTTP2_FRAME_HEADER_LENGTH; |
| 171 | |
| 172 | return n; |
| 173 | } |
| 174 | |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 175 | static void lws_http2_settings_write(struct lws *wsi, int n, unsigned char *buf) |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 176 | { |
| 177 | *buf++ = n >> 8; |
| 178 | *buf++ = n; |
| 179 | *buf++ = wsi->u.http2.my_settings.setting[n] >> 24; |
| 180 | *buf++ = wsi->u.http2.my_settings.setting[n] >> 16; |
| 181 | *buf++ = wsi->u.http2.my_settings.setting[n] >> 8; |
| 182 | *buf = wsi->u.http2.my_settings.setting[n]; |
| 183 | } |
| 184 | |
Andy Green | 904b07d | 2014-11-26 14:38:04 +0800 | [diff] [blame] | 185 | static const char * https_client_preface = |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 186 | "PRI * HTTP/2.0\x0d\x0a\x0d\x0aSM\x0d\x0a\x0d\x0a"; |
| 187 | |
| 188 | int |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 189 | lws_http2_parser(struct lws_context *context, |
| 190 | struct lws *wsi, unsigned char c) |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 191 | { |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 192 | struct lws *swsi; |
Andy Green | 2add634 | 2014-10-12 08:38:16 +0800 | [diff] [blame] | 193 | int n; |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 194 | //dstruct lws *wsi_new; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 195 | |
| 196 | switch (wsi->state) { |
| 197 | case WSI_STATE_HTTP2_AWAIT_CLIENT_PREFACE: |
| 198 | if (https_client_preface[wsi->u.http2.count++] != c) |
| 199 | return 1; |
| 200 | |
| 201 | if (!https_client_preface[wsi->u.http2.count]) { |
Andy Green | 7df53c5 | 2014-10-22 15:37:28 +0800 | [diff] [blame] | 202 | lwsl_info("http2: %p: established\n", wsi); |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 203 | wsi->state = WSI_STATE_HTTP2_ESTABLISHED_PRE_SETTINGS; |
| 204 | wsi->u.http2.count = 0; |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 205 | wsi->u.http2.tx_credit = 65535; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 206 | |
| 207 | /* |
| 208 | * we must send a settings frame -- empty one is OK... |
| 209 | * that must be the first thing sent by server |
| 210 | * and the peer must send a SETTINGS with ACK flag... |
| 211 | */ |
| 212 | |
| 213 | lws_set_protocol_write_pending(context, wsi, LWS_PPS_HTTP2_MY_SETTINGS); |
| 214 | } |
| 215 | break; |
| 216 | |
| 217 | case WSI_STATE_HTTP2_ESTABLISHED_PRE_SETTINGS: |
| 218 | case WSI_STATE_HTTP2_ESTABLISHED: |
| 219 | if (wsi->u.http2.frame_state == LWS_HTTP2_FRAME_HEADER_LENGTH) { // payload |
Andy Green | 200f385 | 2014-10-18 12:23:05 +0800 | [diff] [blame] | 220 | wsi->u.http2.count++; |
| 221 | wsi->u.http2.stream_wsi->u.http2.count = wsi->u.http2.count; |
Andy Green | ecc2e72 | 2014-10-09 16:57:47 +0800 | [diff] [blame] | 222 | /* applies to wsi->u.http2.stream_wsi which may be wsi*/ |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 223 | switch(wsi->u.http2.type) { |
| 224 | case LWS_HTTP2_FRAME_TYPE_SETTINGS: |
Andy Green | ecc2e72 | 2014-10-09 16:57:47 +0800 | [diff] [blame] | 225 | wsi->u.http2.stream_wsi->u.http2.one_setting[wsi->u.http2.count % LWS_HTTP2_SETTINGS_LENGTH] = c; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 226 | if (wsi->u.http2.count % LWS_HTTP2_SETTINGS_LENGTH == LWS_HTTP2_SETTINGS_LENGTH - 1) |
| 227 | if (lws_http2_interpret_settings_payload( |
Andy Green | ecc2e72 | 2014-10-09 16:57:47 +0800 | [diff] [blame] | 228 | &wsi->u.http2.stream_wsi->u.http2.peer_settings, |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 229 | wsi->u.http2.one_setting, |
| 230 | LWS_HTTP2_SETTINGS_LENGTH)) |
| 231 | return 1; |
| 232 | break; |
Andy Green | bbbf07a | 2014-10-27 16:46:44 +0800 | [diff] [blame] | 233 | case LWS_HTTP2_FRAME_TYPE_CONTINUATION: |
Andy Green | ecc2e72 | 2014-10-09 16:57:47 +0800 | [diff] [blame] | 234 | case LWS_HTTP2_FRAME_TYPE_HEADERS: |
Andy Green | 91b0589 | 2014-10-17 08:38:44 +0800 | [diff] [blame] | 235 | lwsl_info(" %02X\n", c); |
Andy Green | 2add634 | 2014-10-12 08:38:16 +0800 | [diff] [blame] | 236 | if (lws_hpack_interpret(context, wsi->u.http2.stream_wsi, c)) |
| 237 | return 1; |
Andy Green | ecc2e72 | 2014-10-09 16:57:47 +0800 | [diff] [blame] | 238 | break; |
Andy Green | 7df53c5 | 2014-10-22 15:37:28 +0800 | [diff] [blame] | 239 | case LWS_HTTP2_FRAME_TYPE_GOAWAY: |
| 240 | if (wsi->u.http2.count >= 5 && wsi->u.http2.count <= 8) { |
| 241 | wsi->u.http2.hpack_e_dep <<= 8; |
| 242 | wsi->u.http2.hpack_e_dep |= c; |
| 243 | if (wsi->u.http2.count == 8) { |
| 244 | lwsl_info("goaway err 0x%x\n", wsi->u.http2.hpack_e_dep); |
| 245 | } |
| 246 | } |
| 247 | wsi->u.http2.GOING_AWAY = 1; |
| 248 | break; |
Andy Green | bbbf07a | 2014-10-27 16:46:44 +0800 | [diff] [blame] | 249 | case LWS_HTTP2_FRAME_TYPE_DATA: |
| 250 | break; |
| 251 | case LWS_HTTP2_FRAME_TYPE_PRIORITY: |
| 252 | break; |
| 253 | case LWS_HTTP2_FRAME_TYPE_RST_STREAM: |
| 254 | break; |
| 255 | case LWS_HTTP2_FRAME_TYPE_PUSH_PROMISE: |
| 256 | break; |
| 257 | case LWS_HTTP2_FRAME_TYPE_PING: |
| 258 | if (wsi->u.http2.flags & LWS_HTTP2_FLAG_SETTINGS_ACK) { // ack |
| 259 | } else { /* they're sending us a ping request */ |
| 260 | if (wsi->u.http2.count > 8) |
| 261 | return 1; |
| 262 | wsi->u.http2.ping_payload[wsi->u.http2.count - 1] = c; |
| 263 | } |
| 264 | break; |
| 265 | case LWS_HTTP2_FRAME_TYPE_WINDOW_UPDATE: |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 266 | wsi->u.http2.hpack_e_dep <<= 8; |
| 267 | wsi->u.http2.hpack_e_dep |= c; |
Andy Green | bbbf07a | 2014-10-27 16:46:44 +0800 | [diff] [blame] | 268 | break; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 269 | } |
Andy Green | 2add634 | 2014-10-12 08:38:16 +0800 | [diff] [blame] | 270 | if (wsi->u.http2.count != wsi->u.http2.length) |
| 271 | break; |
| 272 | |
| 273 | /* end of frame */ |
| 274 | |
| 275 | wsi->u.http2.frame_state = 0; |
| 276 | wsi->u.http2.count = 0; |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 277 | swsi = wsi->u.http2.stream_wsi; |
Andy Green | 2add634 | 2014-10-12 08:38:16 +0800 | [diff] [blame] | 278 | /* set our initial window size */ |
| 279 | if (!wsi->u.http2.initialized) { |
| 280 | wsi->u.http2.tx_credit = wsi->u.http2.peer_settings.setting[LWS_HTTP2_SETTINGS__INITIAL_WINDOW_SIZE]; |
| 281 | lwsl_info("initial tx credit on master conn %p: %d\n", wsi, wsi->u.http2.tx_credit); |
| 282 | wsi->u.http2.initialized = 1; |
| 283 | } |
| 284 | switch (wsi->u.http2.type) { |
| 285 | case LWS_HTTP2_FRAME_TYPE_HEADERS: |
| 286 | /* service the http request itself */ |
Andy Green | 7df53c5 | 2014-10-22 15:37:28 +0800 | [diff] [blame] | 287 | lwsl_info("servicing initial http request, wsi=%p, stream wsi=%p\n", wsi, wsi->u.http2.stream_wsi); |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 288 | n = lws_http_action(context, swsi); |
wonder-mice | 644fea1 | 2015-04-22 16:30:45 -0700 | [diff] [blame] | 289 | (void)n; |
Andy Green | 2add634 | 2014-10-12 08:38:16 +0800 | [diff] [blame] | 290 | lwsl_info(" action result %d\n", n); |
| 291 | break; |
Andy Green | bbbf07a | 2014-10-27 16:46:44 +0800 | [diff] [blame] | 292 | case LWS_HTTP2_FRAME_TYPE_PING: |
| 293 | if (wsi->u.http2.flags & LWS_HTTP2_FLAG_SETTINGS_ACK) { // ack |
| 294 | } else { /* they're sending us a ping request */ |
| 295 | lws_set_protocol_write_pending(context, wsi, LWS_PPS_HTTP2_PONG); |
| 296 | } |
| 297 | break; |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 298 | case LWS_HTTP2_FRAME_TYPE_WINDOW_UPDATE: |
| 299 | wsi->u.http2.hpack_e_dep &= ~(1 << 31); |
| 300 | if ((long long)swsi->u.http2.tx_credit + (unsigned long long)wsi->u.http2.hpack_e_dep > (~(1 << 31))) |
| 301 | return 1; /* actually need to close swsi not the whole show */ |
| 302 | swsi->u.http2.tx_credit += wsi->u.http2.hpack_e_dep; |
| 303 | if (swsi->u.http2.waiting_tx_credit && swsi->u.http2.tx_credit > 0) { |
| 304 | lwsl_info("%s: %p: waiting_tx_credit -> wait on writeable\n", __func__, wsi); |
| 305 | swsi->u.http2.waiting_tx_credit = 0; |
Andy Green | 6230476 | 2015-12-04 08:43:54 +0800 | [diff] [blame] | 306 | lws_callback_on_writable(context, swsi); |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 307 | } |
| 308 | break; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 309 | } |
| 310 | break; |
| 311 | } |
| 312 | switch (wsi->u.http2.frame_state++) { |
| 313 | case 0: |
| 314 | wsi->u.http2.length = c; |
| 315 | break; |
| 316 | case 1: |
| 317 | case 2: |
| 318 | wsi->u.http2.length <<= 8; |
| 319 | wsi->u.http2.length |= c; |
| 320 | break; |
| 321 | case 3: |
| 322 | wsi->u.http2.type = c; |
| 323 | break; |
| 324 | case 4: |
| 325 | wsi->u.http2.flags = c; |
| 326 | break; |
| 327 | case 5: |
| 328 | case 6: |
| 329 | case 7: |
| 330 | case 8: |
| 331 | wsi->u.http2.stream_id <<= 8; |
| 332 | wsi->u.http2.stream_id |= c; |
| 333 | break; |
| 334 | } |
| 335 | if (wsi->u.http2.frame_state == LWS_HTTP2_FRAME_HEADER_LENGTH) { /* frame header complete */ |
| 336 | lwsl_info("frame: type 0x%x, flags 0x%x, sid 0x%x, len 0x%x\n", |
| 337 | wsi->u.http2.type, wsi->u.http2.flags, wsi->u.http2.stream_id, wsi->u.http2.length); |
| 338 | wsi->u.http2.count = 0; |
| 339 | |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 340 | wsi->u.http2.stream_wsi = wsi; |
| 341 | if (wsi->u.http2.stream_id) |
| 342 | wsi->u.http2.stream_wsi = lws_http2_wsi_from_id(wsi, wsi->u.http2.stream_id); |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 343 | |
| 344 | switch (wsi->u.http2.type) { |
| 345 | case LWS_HTTP2_FRAME_TYPE_SETTINGS: |
| 346 | /* nonzero sid on settings is illegal */ |
| 347 | if (wsi->u.http2.stream_id) |
| 348 | return 1; |
| 349 | |
Andy Green | 91b0589 | 2014-10-17 08:38:44 +0800 | [diff] [blame] | 350 | if (wsi->u.http2.flags & LWS_HTTP2_FLAG_SETTINGS_ACK) { // ack |
| 351 | } else |
| 352 | /* non-ACK coming in means we must ACK it */ |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 353 | lws_set_protocol_write_pending(context, wsi, LWS_PPS_HTTP2_ACK_SETTINGS); |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 354 | break; |
Andy Green | bbbf07a | 2014-10-27 16:46:44 +0800 | [diff] [blame] | 355 | case LWS_HTTP2_FRAME_TYPE_PING: |
| 356 | if (wsi->u.http2.stream_id) |
| 357 | return 1; |
| 358 | if (wsi->u.http2.length != 8) |
| 359 | return 1; |
| 360 | break; |
Andy Green | 91b0589 | 2014-10-17 08:38:44 +0800 | [diff] [blame] | 361 | case LWS_HTTP2_FRAME_TYPE_CONTINUATION: |
| 362 | if (wsi->u.http2.END_HEADERS) |
| 363 | return 1; |
| 364 | goto update_end_headers; |
| 365 | |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 366 | case LWS_HTTP2_FRAME_TYPE_HEADERS: |
Andy Green | 2add634 | 2014-10-12 08:38:16 +0800 | [diff] [blame] | 367 | lwsl_info("LWS_HTTP2_FRAME_TYPE_HEADERS: stream_id = %d\n", wsi->u.http2.stream_id); |
Andy Green | ecc2e72 | 2014-10-09 16:57:47 +0800 | [diff] [blame] | 368 | if (!wsi->u.http2.stream_id) |
| 369 | return 1; |
Andy Green | ecc2e72 | 2014-10-09 16:57:47 +0800 | [diff] [blame] | 370 | if (!wsi->u.http2.stream_wsi) |
| 371 | wsi->u.http2.stream_wsi = lws_create_server_child_wsi(context, wsi, wsi->u.http2.stream_id); |
Andy Green | 200f385 | 2014-10-18 12:23:05 +0800 | [diff] [blame] | 372 | |
Andy Green | 91b0589 | 2014-10-17 08:38:44 +0800 | [diff] [blame] | 373 | /* END_STREAM means after servicing this, close the stream */ |
| 374 | wsi->u.http2.END_STREAM = !!(wsi->u.http2.flags & LWS_HTTP2_FLAG_END_STREAM); |
Andy Green | 200f385 | 2014-10-18 12:23:05 +0800 | [diff] [blame] | 375 | lwsl_info("%s: headers END_STREAM = %d\n",__func__, wsi->u.http2.END_STREAM); |
Andy Green | 91b0589 | 2014-10-17 08:38:44 +0800 | [diff] [blame] | 376 | update_end_headers: |
| 377 | /* no END_HEADERS means CONTINUATION must come */ |
| 378 | wsi->u.http2.END_HEADERS = !!(wsi->u.http2.flags & LWS_HTTP2_FLAG_END_HEADERS); |
Andy Green | 200f385 | 2014-10-18 12:23:05 +0800 | [diff] [blame] | 379 | |
| 380 | swsi = wsi->u.http2.stream_wsi; |
| 381 | if (!swsi) |
| 382 | return 1; |
| 383 | |
| 384 | |
| 385 | /* prepare the hpack parser at the right start */ |
| 386 | |
| 387 | swsi->u.http2.flags = wsi->u.http2.flags; |
| 388 | swsi->u.http2.length = wsi->u.http2.length; |
| 389 | swsi->u.http2.END_STREAM = wsi->u.http2.END_STREAM; |
| 390 | |
| 391 | if (swsi->u.http2.flags & LWS_HTTP2_FLAG_PADDED) |
| 392 | swsi->u.http2.hpack = HPKS_OPT_PADDING; |
| 393 | else |
| 394 | if (swsi->u.http2.flags & LWS_HTTP2_FLAG_PRIORITY) { |
| 395 | swsi->u.http2.hpack = HKPS_OPT_E_DEPENDENCY; |
| 396 | swsi->u.http2.hpack_m = 4; |
| 397 | } else |
| 398 | swsi->u.http2.hpack = HPKS_TYPE; |
| 399 | lwsl_info("initial hpack state %d\n", swsi->u.http2.hpack); |
Andy Green | 91b0589 | 2014-10-17 08:38:44 +0800 | [diff] [blame] | 400 | break; |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 401 | case LWS_HTTP2_FRAME_TYPE_WINDOW_UPDATE: |
| 402 | if (wsi->u.http2.length != 4) |
| 403 | return 1; |
| 404 | break; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 405 | } |
| 406 | if (wsi->u.http2.length == 0) |
| 407 | wsi->u.http2.frame_state = 0; |
| 408 | |
| 409 | } |
| 410 | break; |
| 411 | } |
| 412 | |
| 413 | return 0; |
| 414 | } |
| 415 | |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 416 | int lws_http2_do_pps_send(struct lws_context *context, struct lws *wsi) |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 417 | { |
| 418 | unsigned char settings[LWS_SEND_BUFFER_PRE_PADDING + 6 * LWS_HTTP2_SETTINGS__COUNT]; |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 419 | struct lws *swsi; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 420 | int n, m = 0; |
| 421 | |
Andy Green | 97ee57f | 2014-10-29 09:39:08 +0800 | [diff] [blame] | 422 | lwsl_debug("%s: %p: %d\n", __func__, wsi, wsi->pps); |
| 423 | |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 424 | switch (wsi->pps) { |
| 425 | case LWS_PPS_HTTP2_MY_SETTINGS: |
| 426 | for (n = 1; n < LWS_HTTP2_SETTINGS__COUNT; n++) |
| 427 | if (wsi->u.http2.my_settings.setting[n] != lws_http2_default_settings.setting[n]) { |
| 428 | lws_http2_settings_write(wsi, n, |
| 429 | &settings[LWS_SEND_BUFFER_PRE_PADDING + m]); |
| 430 | m += sizeof(wsi->u.http2.one_setting); |
| 431 | } |
| 432 | n = lws_http2_frame_write(wsi, LWS_HTTP2_FRAME_TYPE_SETTINGS, |
| 433 | 0, LWS_HTTP2_STREAM_ID_MASTER, m, |
| 434 | &settings[LWS_SEND_BUFFER_PRE_PADDING]); |
| 435 | if (n != m) { |
| 436 | lwsl_info("send %d %d\n", n, m); |
| 437 | return 1; |
| 438 | } |
| 439 | break; |
| 440 | case LWS_PPS_HTTP2_ACK_SETTINGS: |
| 441 | /* send ack ... always empty */ |
| 442 | n = lws_http2_frame_write(wsi, LWS_HTTP2_FRAME_TYPE_SETTINGS, |
| 443 | 1, LWS_HTTP2_STREAM_ID_MASTER, 0, |
| 444 | &settings[LWS_SEND_BUFFER_PRE_PADDING]); |
| 445 | if (n) { |
| 446 | lwsl_err("ack tells %d\n", n); |
| 447 | return 1; |
| 448 | } |
| 449 | /* this is the end of the preface dance then? */ |
| 450 | if (wsi->state == WSI_STATE_HTTP2_ESTABLISHED_PRE_SETTINGS) { |
| 451 | wsi->state = WSI_STATE_HTTP2_ESTABLISHED; |
| 452 | |
| 453 | wsi->u.http.fd = LWS_INVALID_FILE; |
Andy Green | b0e2e50 | 2014-10-18 18:54:04 +0800 | [diff] [blame] | 454 | |
Andy Green | 7df53c5 | 2014-10-22 15:37:28 +0800 | [diff] [blame] | 455 | if (lws_is_ssl(lws_http2_get_network_wsi(wsi))) { |
| 456 | lwsl_info("skipping nonexistant ssl upgrade headers\n"); |
| 457 | break; |
| 458 | } |
| 459 | |
Andy Green | b0e2e50 | 2014-10-18 18:54:04 +0800 | [diff] [blame] | 460 | /* |
| 461 | * we need to treat the headers from this upgrade |
| 462 | * as the first job. These need to get |
| 463 | * shifted to stream ID 1 |
| 464 | */ |
| 465 | lwsl_info("%s: setting up sid 1\n", __func__); |
| 466 | |
| 467 | swsi = wsi->u.http2.stream_wsi = lws_create_server_child_wsi(context, wsi, 1); |
| 468 | /* pass on the initial headers to SID 1 */ |
| 469 | swsi->u.http.ah = wsi->u.http.ah; |
| 470 | wsi->u.http.ah = NULL; |
| 471 | |
| 472 | lwsl_info("%s: inherited headers %p\n", __func__, swsi->u.http.ah); |
| 473 | swsi->u.http2.tx_credit = wsi->u.http2.peer_settings.setting[LWS_HTTP2_SETTINGS__INITIAL_WINDOW_SIZE]; |
| 474 | lwsl_info("initial tx credit on conn %p: %d\n", swsi, swsi->u.http2.tx_credit); |
| 475 | swsi->u.http2.initialized = 1; |
| 476 | /* demanded by HTTP2 */ |
| 477 | swsi->u.http2.END_STREAM = 1; |
| 478 | lwsl_info("servicing initial http request\n"); |
| 479 | return lws_http_action(context, swsi); |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 480 | } |
| 481 | break; |
Andy Green | bbbf07a | 2014-10-27 16:46:44 +0800 | [diff] [blame] | 482 | case LWS_PPS_HTTP2_PONG: |
| 483 | memcpy(&settings[LWS_SEND_BUFFER_PRE_PADDING], wsi->u.http2.ping_payload, 8); |
| 484 | n = lws_http2_frame_write(wsi, LWS_HTTP2_FRAME_TYPE_PING, |
| 485 | LWS_HTTP2_FLAG_SETTINGS_ACK, |
| 486 | LWS_HTTP2_STREAM_ID_MASTER, 8, |
| 487 | &settings[LWS_SEND_BUFFER_PRE_PADDING]); |
| 488 | if (n != 8) { |
| 489 | lwsl_info("send %d %d\n", n, m); |
| 490 | return 1; |
| 491 | } |
| 492 | break; |
Andy Green | 024eb6c | 2014-10-08 12:00:53 +0800 | [diff] [blame] | 493 | default: |
| 494 | break; |
| 495 | } |
| 496 | |
| 497 | return 0; |
Andy Green | 7df53c5 | 2014-10-22 15:37:28 +0800 | [diff] [blame] | 498 | } |
| 499 | |
Andy Green | 4b85c1d | 2015-12-04 11:08:32 +0800 | [diff] [blame^] | 500 | struct lws * lws_http2_get_nth_child(struct lws *wsi, int n) |
Andy Green | 7df53c5 | 2014-10-22 15:37:28 +0800 | [diff] [blame] | 501 | { |
| 502 | do { |
| 503 | wsi = wsi->u.http2.next_child_wsi; |
| 504 | if (!wsi) |
| 505 | return NULL; |
| 506 | } while (n--); |
| 507 | |
| 508 | return wsi; |
| 509 | } |