1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | ***************************************************************************/
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22 |
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23 | #include "curl_setup.h"
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24 |
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25 | #ifdef USE_NGHTTP2
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26 | #include <nghttp2/nghttp2.h>
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27 | #include "urldata.h"
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28 | #include "http2.h"
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29 | #include "http.h"
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30 | #include "sendf.h"
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31 | #include "select.h"
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32 | #include "curl_base64.h"
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33 | #include "strcase.h"
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34 | #include "multiif.h"
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35 | #include "url.h"
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36 | #include "connect.h"
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37 | #include "strtoofft.h"
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38 | #include "strdup.h"
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39 | /* The last 3 #include files should be in this order */
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40 | #include "curl_printf.h"
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41 | #include "curl_memory.h"
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42 | #include "memdebug.h"
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43 |
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44 | #define MIN(x,y) ((x)<(y)?(x):(y))
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45 |
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46 | #if (NGHTTP2_VERSION_NUM < 0x010000)
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47 | #error too old nghttp2 version, upgrade!
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48 | #endif
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49 |
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50 | #if (NGHTTP2_VERSION_NUM > 0x010800)
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51 | #define NGHTTP2_HAS_HTTP2_STRERROR 1
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52 | #endif
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53 |
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54 | #if (NGHTTP2_VERSION_NUM >= 0x010900)
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55 | /* nghttp2_session_callbacks_set_error_callback is present in nghttp2 1.9.0 or
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56 | later */
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57 | #define NGHTTP2_HAS_ERROR_CALLBACK 1
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58 | #else
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59 | #define nghttp2_session_callbacks_set_error_callback(x,y)
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60 | #endif
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61 |
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62 | #if (NGHTTP2_VERSION_NUM >= 0x010c00)
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63 | #define NGHTTP2_HAS_SET_LOCAL_WINDOW_SIZE 1
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64 | #endif
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65 |
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66 | #define HTTP2_HUGE_WINDOW_SIZE (1 << 30)
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67 |
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68 | /*
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69 | * Curl_http2_init_state() is called when the easy handle is created and
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70 | * allows for HTTP/2 specific init of state.
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71 | */
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72 | void Curl_http2_init_state(struct UrlState *state)
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73 | {
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74 | state->stream_weight = NGHTTP2_DEFAULT_WEIGHT;
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75 | }
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76 |
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77 | /*
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78 | * Curl_http2_init_userset() is called when the easy handle is created and
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79 | * allows for HTTP/2 specific user-set fields.
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80 | */
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81 | void Curl_http2_init_userset(struct UserDefined *set)
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82 | {
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83 | set->stream_weight = NGHTTP2_DEFAULT_WEIGHT;
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84 | }
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85 |
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86 | static int http2_perform_getsock(const struct connectdata *conn,
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87 | curl_socket_t *sock, /* points to
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88 | numsocks
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89 | number of
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90 | sockets */
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91 | int numsocks)
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92 | {
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93 | const struct http_conn *c = &conn->proto.httpc;
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94 | int bitmap = GETSOCK_BLANK;
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95 | (void)numsocks;
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96 |
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97 | /* TODO We should check underlying socket state if it is SSL socket
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98 | because of renegotiation. */
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99 | sock[0] = conn->sock[FIRSTSOCKET];
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100 |
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101 | /* in a HTTP/2 connection we can basically always get a frame so we should
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102 | always be ready for one */
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103 | bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
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104 |
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105 | if(nghttp2_session_want_write(c->h2))
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106 | bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
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107 |
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108 | return bitmap;
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109 | }
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110 |
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111 | static int http2_getsock(struct connectdata *conn,
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112 | curl_socket_t *sock, /* points to numsocks
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113 | number of sockets */
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114 | int numsocks)
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115 | {
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116 | return http2_perform_getsock(conn, sock, numsocks);
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117 | }
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118 |
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119 | /*
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120 | * http2_stream_free() free HTTP2 stream related data
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121 | */
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122 | static void http2_stream_free(struct HTTP *http)
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123 | {
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124 | if(http) {
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125 | Curl_add_buffer_free(http->header_recvbuf);
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126 | http->header_recvbuf = NULL; /* clear the pointer */
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127 | Curl_add_buffer_free(http->trailer_recvbuf);
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128 | http->trailer_recvbuf = NULL; /* clear the pointer */
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129 | for(; http->push_headers_used > 0; --http->push_headers_used) {
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130 | free(http->push_headers[http->push_headers_used - 1]);
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131 | }
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132 | free(http->push_headers);
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133 | http->push_headers = NULL;
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134 | }
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135 | }
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136 |
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137 | static CURLcode http2_disconnect(struct connectdata *conn,
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138 | bool dead_connection)
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139 | {
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140 | struct http_conn *c = &conn->proto.httpc;
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141 | (void)dead_connection;
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142 |
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143 | DEBUGF(infof(conn->data, "HTTP/2 DISCONNECT starts now\n"));
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144 |
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145 | nghttp2_session_del(c->h2);
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146 | Curl_safefree(c->inbuf);
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147 | http2_stream_free(conn->data->req.protop);
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148 |
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149 | DEBUGF(infof(conn->data, "HTTP/2 DISCONNECT done\n"));
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150 |
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151 | return CURLE_OK;
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152 | }
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153 |
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154 | /*
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155 | * The server may send us data at any point (e.g. PING frames). Therefore,
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156 | * we cannot assume that an HTTP/2 socket is dead just because it is readable.
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157 | *
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158 | * Instead, if it is readable, run Curl_connalive() to peek at the socket
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159 | * and distinguish between closed and data.
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160 | */
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161 | static bool http2_connisdead(struct connectdata *check)
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162 | {
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163 | int sval;
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164 | bool ret_val = TRUE;
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165 |
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166 | sval = SOCKET_READABLE(check->sock[FIRSTSOCKET], 0);
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167 | if(sval == 0) {
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168 | /* timeout */
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169 | ret_val = FALSE;
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170 | }
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171 | else if(sval & CURL_CSELECT_ERR) {
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172 | /* socket is in an error state */
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173 | ret_val = TRUE;
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174 | }
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175 | else if(sval & CURL_CSELECT_IN) {
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176 | /* readable with no error. could still be closed */
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177 | ret_val = !Curl_connalive(check);
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178 | }
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179 |
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180 | return ret_val;
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181 | }
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182 |
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183 |
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184 | static unsigned int http2_conncheck(struct connectdata *check,
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185 | unsigned int checks_to_perform)
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186 | {
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187 | unsigned int ret_val = CONNRESULT_NONE;
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188 |
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189 | if(checks_to_perform & CONNCHECK_ISDEAD) {
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190 | if(http2_connisdead(check))
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191 | ret_val |= CONNRESULT_DEAD;
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192 | }
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193 |
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194 | return ret_val;
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195 | }
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196 |
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197 | /* called from Curl_http_setup_conn */
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198 | void Curl_http2_setup_req(struct Curl_easy *data)
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199 | {
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200 | struct HTTP *http = data->req.protop;
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201 |
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202 | http->nread_header_recvbuf = 0;
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203 | http->bodystarted = FALSE;
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204 | http->status_code = -1;
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205 | http->pausedata = NULL;
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206 | http->pauselen = 0;
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207 | http->error_code = NGHTTP2_NO_ERROR;
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208 | http->closed = FALSE;
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209 | http->close_handled = FALSE;
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210 | http->mem = data->state.buffer;
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211 | http->len = data->set.buffer_size;
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212 | http->memlen = 0;
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213 | }
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214 |
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215 | /* called from Curl_http_setup_conn */
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216 | void Curl_http2_setup_conn(struct connectdata *conn)
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217 | {
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218 | conn->proto.httpc.settings.max_concurrent_streams =
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219 | DEFAULT_MAX_CONCURRENT_STREAMS;
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220 | }
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221 |
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222 | /*
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223 | * HTTP2 handler interface. This isn't added to the general list of protocols
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224 | * but will be used at run-time when the protocol is dynamically switched from
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225 | * HTTP to HTTP2.
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226 | */
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227 | static const struct Curl_handler Curl_handler_http2 = {
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228 | "HTTP", /* scheme */
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229 | ZERO_NULL, /* setup_connection */
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230 | Curl_http, /* do_it */
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231 | Curl_http_done, /* done */
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232 | ZERO_NULL, /* do_more */
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233 | ZERO_NULL, /* connect_it */
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234 | ZERO_NULL, /* connecting */
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235 | ZERO_NULL, /* doing */
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236 | http2_getsock, /* proto_getsock */
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237 | http2_getsock, /* doing_getsock */
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238 | ZERO_NULL, /* domore_getsock */
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239 | http2_perform_getsock, /* perform_getsock */
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240 | http2_disconnect, /* disconnect */
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241 | ZERO_NULL, /* readwrite */
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242 | http2_conncheck, /* connection_check */
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243 | PORT_HTTP, /* defport */
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244 | CURLPROTO_HTTP, /* protocol */
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245 | PROTOPT_STREAM /* flags */
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246 | };
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247 |
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248 | static const struct Curl_handler Curl_handler_http2_ssl = {
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249 | "HTTPS", /* scheme */
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250 | ZERO_NULL, /* setup_connection */
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251 | Curl_http, /* do_it */
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252 | Curl_http_done, /* done */
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253 | ZERO_NULL, /* do_more */
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254 | ZERO_NULL, /* connect_it */
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255 | ZERO_NULL, /* connecting */
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256 | ZERO_NULL, /* doing */
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257 | http2_getsock, /* proto_getsock */
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258 | http2_getsock, /* doing_getsock */
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259 | ZERO_NULL, /* domore_getsock */
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260 | http2_perform_getsock, /* perform_getsock */
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261 | http2_disconnect, /* disconnect */
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262 | ZERO_NULL, /* readwrite */
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263 | http2_conncheck, /* connection_check */
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264 | PORT_HTTP, /* defport */
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265 | CURLPROTO_HTTPS, /* protocol */
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266 | PROTOPT_SSL | PROTOPT_STREAM /* flags */
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267 | };
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268 |
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269 | /*
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270 | * Store nghttp2 version info in this buffer, Prefix with a space. Return
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271 | * total length written.
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272 | */
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273 | int Curl_http2_ver(char *p, size_t len)
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274 | {
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275 | nghttp2_info *h2 = nghttp2_version(0);
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276 | return snprintf(p, len, " nghttp2/%s", h2->version_str);
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277 | }
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278 |
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279 | /* HTTP/2 error code to name based on the Error Code Registry.
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280 | https://tools.ietf.org/html/rfc7540#page-77
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281 | nghttp2_error_code enums are identical.
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282 | */
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283 | const char *Curl_http2_strerror(uint32_t err)
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284 | {
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285 | #ifndef NGHTTP2_HAS_HTTP2_STRERROR
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286 | const char *str[] = {
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287 | "NO_ERROR", /* 0x0 */
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288 | "PROTOCOL_ERROR", /* 0x1 */
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289 | "INTERNAL_ERROR", /* 0x2 */
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290 | "FLOW_CONTROL_ERROR", /* 0x3 */
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291 | "SETTINGS_TIMEOUT", /* 0x4 */
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292 | "STREAM_CLOSED", /* 0x5 */
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293 | "FRAME_SIZE_ERROR", /* 0x6 */
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294 | "REFUSED_STREAM", /* 0x7 */
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295 | "CANCEL", /* 0x8 */
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296 | "COMPRESSION_ERROR", /* 0x9 */
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297 | "CONNECT_ERROR", /* 0xA */
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298 | "ENHANCE_YOUR_CALM", /* 0xB */
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299 | "INADEQUATE_SECURITY", /* 0xC */
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300 | "HTTP_1_1_REQUIRED" /* 0xD */
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301 | };
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302 | return (err < sizeof str / sizeof str[0]) ? str[err] : "unknown";
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303 | #else
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304 | return nghttp2_http2_strerror(err);
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305 | #endif
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306 | }
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307 |
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308 | /*
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309 | * The implementation of nghttp2_send_callback type. Here we write |data| with
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310 | * size |length| to the network and return the number of bytes actually
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311 | * written. See the documentation of nghttp2_send_callback for the details.
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312 | */
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313 | static ssize_t send_callback(nghttp2_session *h2,
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314 | const uint8_t *data, size_t length, int flags,
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315 | void *userp)
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316 | {
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317 | struct connectdata *conn = (struct connectdata *)userp;
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318 | struct http_conn *c = &conn->proto.httpc;
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319 | ssize_t written;
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320 | CURLcode result = CURLE_OK;
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321 |
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322 | (void)h2;
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323 | (void)flags;
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324 |
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325 | written = ((Curl_send*)c->send_underlying)(conn, FIRSTSOCKET,
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326 | data, length, &result);
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327 |
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328 | if(result == CURLE_AGAIN) {
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329 | return NGHTTP2_ERR_WOULDBLOCK;
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330 | }
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331 |
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332 | if(written == -1) {
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333 | failf(conn->data, "Failed sending HTTP2 data");
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334 | return NGHTTP2_ERR_CALLBACK_FAILURE;
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335 | }
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336 |
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337 | if(!written)
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338 | return NGHTTP2_ERR_WOULDBLOCK;
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339 |
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340 | return written;
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341 | }
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342 |
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343 |
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344 | /* We pass a pointer to this struct in the push callback, but the contents of
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345 | the struct are hidden from the user. */
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346 | struct curl_pushheaders {
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347 | struct Curl_easy *data;
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348 | const nghttp2_push_promise *frame;
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349 | };
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350 |
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351 | /*
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352 | * push header access function. Only to be used from within the push callback
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353 | */
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354 | char *curl_pushheader_bynum(struct curl_pushheaders *h, size_t num)
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355 | {
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356 | /* Verify that we got a good easy handle in the push header struct, mostly to
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357 | detect rubbish input fast(er). */
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358 | if(!h || !GOOD_EASY_HANDLE(h->data))
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359 | return NULL;
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360 | else {
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361 | struct HTTP *stream = h->data->req.protop;
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362 | if(num < stream->push_headers_used)
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363 | return stream->push_headers[num];
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364 | }
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365 | return NULL;
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366 | }
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367 |
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368 | /*
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369 | * push header access function. Only to be used from within the push callback
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370 | */
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371 | char *curl_pushheader_byname(struct curl_pushheaders *h, const char *header)
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372 | {
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373 | /* Verify that we got a good easy handle in the push header struct,
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374 | mostly to detect rubbish input fast(er). Also empty header name
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375 | is just a rubbish too. We have to allow ":" at the beginning of
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376 | the header, but header == ":" must be rejected. If we have ':' in
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377 | the middle of header, it could be matched in middle of the value,
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378 | this is because we do prefix match.*/
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379 | if(!h || !GOOD_EASY_HANDLE(h->data) || !header || !header[0] ||
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380 | !strcmp(header, ":") || strchr(header + 1, ':'))
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381 | return NULL;
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382 | else {
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383 | struct HTTP *stream = h->data->req.protop;
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384 | size_t len = strlen(header);
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385 | size_t i;
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386 | for(i = 0; i<stream->push_headers_used; i++) {
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387 | if(!strncmp(header, stream->push_headers[i], len)) {
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388 | /* sub-match, make sure that it is followed by a colon */
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389 | if(stream->push_headers[i][len] != ':')
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390 | continue;
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391 | return &stream->push_headers[i][len + 1];
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392 | }
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393 | }
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394 | }
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395 | return NULL;
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396 | }
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397 |
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398 | static struct Curl_easy *duphandle(struct Curl_easy *data)
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399 | {
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400 | struct Curl_easy *second = curl_easy_duphandle(data);
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401 | if(second) {
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402 | /* setup the request struct */
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403 | struct HTTP *http = calloc(1, sizeof(struct HTTP));
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404 | if(!http) {
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405 | (void)Curl_close(second);
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406 | second = NULL;
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407 | }
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408 | else {
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409 | second->req.protop = http;
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410 | http->header_recvbuf = Curl_add_buffer_init();
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411 | if(!http->header_recvbuf) {
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412 | free(http);
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413 | (void)Curl_close(second);
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414 | second = NULL;
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415 | }
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416 | else {
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417 | Curl_http2_setup_req(second);
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418 | second->state.stream_weight = data->state.stream_weight;
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419 | }
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420 | }
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421 | }
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422 | return second;
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423 | }
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424 |
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425 |
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426 | static int push_promise(struct Curl_easy *data,
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427 | struct connectdata *conn,
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428 | const nghttp2_push_promise *frame)
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429 | {
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430 | int rv;
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431 | DEBUGF(infof(data, "PUSH_PROMISE received, stream %u!\n",
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432 | frame->promised_stream_id));
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433 | if(data->multi->push_cb) {
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434 | struct HTTP *stream;
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435 | struct HTTP *newstream;
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436 | struct curl_pushheaders heads;
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437 | CURLMcode rc;
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438 | struct http_conn *httpc;
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439 | size_t i;
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440 | /* clone the parent */
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441 | struct Curl_easy *newhandle = duphandle(data);
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442 | if(!newhandle) {
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443 | infof(data, "failed to duplicate handle\n");
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444 | rv = 1; /* FAIL HARD */
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445 | goto fail;
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446 | }
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447 |
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448 | heads.data = data;
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449 | heads.frame = frame;
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450 | /* ask the application */
|
---|
451 | DEBUGF(infof(data, "Got PUSH_PROMISE, ask application!\n"));
|
---|
452 |
|
---|
453 | stream = data->req.protop;
|
---|
454 | if(!stream) {
|
---|
455 | failf(data, "Internal NULL stream!\n");
|
---|
456 | (void)Curl_close(newhandle);
|
---|
457 | rv = 1;
|
---|
458 | goto fail;
|
---|
459 | }
|
---|
460 |
|
---|
461 | rv = data->multi->push_cb(data, newhandle,
|
---|
462 | stream->push_headers_used, &heads,
|
---|
463 | data->multi->push_userp);
|
---|
464 |
|
---|
465 | /* free the headers again */
|
---|
466 | for(i = 0; i<stream->push_headers_used; i++)
|
---|
467 | free(stream->push_headers[i]);
|
---|
468 | free(stream->push_headers);
|
---|
469 | stream->push_headers = NULL;
|
---|
470 | stream->push_headers_used = 0;
|
---|
471 |
|
---|
472 | if(rv) {
|
---|
473 | /* denied, kill off the new handle again */
|
---|
474 | http2_stream_free(newhandle->req.protop);
|
---|
475 | (void)Curl_close(newhandle);
|
---|
476 | goto fail;
|
---|
477 | }
|
---|
478 |
|
---|
479 | newstream = newhandle->req.protop;
|
---|
480 | newstream->stream_id = frame->promised_stream_id;
|
---|
481 | newhandle->req.maxdownload = -1;
|
---|
482 | newhandle->req.size = -1;
|
---|
483 |
|
---|
484 | /* approved, add to the multi handle and immediately switch to PERFORM
|
---|
485 | state with the given connection !*/
|
---|
486 | rc = Curl_multi_add_perform(data->multi, newhandle, conn);
|
---|
487 | if(rc) {
|
---|
488 | infof(data, "failed to add handle to multi\n");
|
---|
489 | http2_stream_free(newhandle->req.protop);
|
---|
490 | Curl_close(newhandle);
|
---|
491 | rv = 1;
|
---|
492 | goto fail;
|
---|
493 | }
|
---|
494 |
|
---|
495 | httpc = &conn->proto.httpc;
|
---|
496 | nghttp2_session_set_stream_user_data(httpc->h2,
|
---|
497 | frame->promised_stream_id, newhandle);
|
---|
498 | }
|
---|
499 | else {
|
---|
500 | DEBUGF(infof(data, "Got PUSH_PROMISE, ignore it!\n"));
|
---|
501 | rv = 1;
|
---|
502 | }
|
---|
503 | fail:
|
---|
504 | return rv;
|
---|
505 | }
|
---|
506 |
|
---|
507 | static int on_frame_recv(nghttp2_session *session, const nghttp2_frame *frame,
|
---|
508 | void *userp)
|
---|
509 | {
|
---|
510 | struct connectdata *conn = (struct connectdata *)userp;
|
---|
511 | struct http_conn *httpc = &conn->proto.httpc;
|
---|
512 | struct Curl_easy *data_s = NULL;
|
---|
513 | struct HTTP *stream = NULL;
|
---|
514 | static int lastStream = -1;
|
---|
515 | int rv;
|
---|
516 | size_t left, ncopy;
|
---|
517 | int32_t stream_id = frame->hd.stream_id;
|
---|
518 |
|
---|
519 | if(!stream_id) {
|
---|
520 | /* stream ID zero is for connection-oriented stuff */
|
---|
521 | if(frame->hd.type == NGHTTP2_SETTINGS) {
|
---|
522 | uint32_t max_conn = httpc->settings.max_concurrent_streams;
|
---|
523 | DEBUGF(infof(conn->data, "Got SETTINGS\n"));
|
---|
524 | httpc->settings.max_concurrent_streams =
|
---|
525 | nghttp2_session_get_remote_settings(
|
---|
526 | session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS);
|
---|
527 | httpc->settings.enable_push =
|
---|
528 | nghttp2_session_get_remote_settings(
|
---|
529 | session, NGHTTP2_SETTINGS_ENABLE_PUSH);
|
---|
530 | DEBUGF(infof(conn->data, "MAX_CONCURRENT_STREAMS == %d\n",
|
---|
531 | httpc->settings.max_concurrent_streams));
|
---|
532 | DEBUGF(infof(conn->data, "ENABLE_PUSH == %s\n",
|
---|
533 | httpc->settings.enable_push?"TRUE":"false"));
|
---|
534 | if(max_conn != httpc->settings.max_concurrent_streams) {
|
---|
535 | /* only signal change if the value actually changed */
|
---|
536 | infof(conn->data,
|
---|
537 | "Connection state changed (MAX_CONCURRENT_STREAMS updated)!\n");
|
---|
538 | Curl_multi_connchanged(conn->data->multi);
|
---|
539 | }
|
---|
540 | }
|
---|
541 | return 0;
|
---|
542 | }
|
---|
543 | data_s = nghttp2_session_get_stream_user_data(session, stream_id);
|
---|
544 | if(lastStream != stream_id) {
|
---|
545 | lastStream = stream_id;
|
---|
546 | }
|
---|
547 | if(!data_s) {
|
---|
548 | DEBUGF(infof(conn->data,
|
---|
549 | "No Curl_easy associated with stream: %x\n",
|
---|
550 | stream_id));
|
---|
551 | return 0;
|
---|
552 | }
|
---|
553 |
|
---|
554 | stream = data_s->req.protop;
|
---|
555 | if(!stream) {
|
---|
556 | DEBUGF(infof(conn->data, "No proto pointer for stream: %x\n",
|
---|
557 | stream_id));
|
---|
558 | return NGHTTP2_ERR_CALLBACK_FAILURE;
|
---|
559 | }
|
---|
560 |
|
---|
561 | DEBUGF(infof(data_s, "on_frame_recv() header %x stream %x\n",
|
---|
562 | frame->hd.type, stream_id));
|
---|
563 |
|
---|
564 | switch(frame->hd.type) {
|
---|
565 | case NGHTTP2_DATA:
|
---|
566 | /* If body started on this stream, then receiving DATA is illegal. */
|
---|
567 | if(!stream->bodystarted) {
|
---|
568 | rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
|
---|
569 | stream_id, NGHTTP2_PROTOCOL_ERROR);
|
---|
570 |
|
---|
571 | if(nghttp2_is_fatal(rv)) {
|
---|
572 | return NGHTTP2_ERR_CALLBACK_FAILURE;
|
---|
573 | }
|
---|
574 | }
|
---|
575 | break;
|
---|
576 | case NGHTTP2_HEADERS:
|
---|
577 | if(stream->bodystarted) {
|
---|
578 | /* Only valid HEADERS after body started is trailer HEADERS. We
|
---|
579 | buffer them in on_header callback. */
|
---|
580 | break;
|
---|
581 | }
|
---|
582 |
|
---|
583 | /* nghttp2 guarantees that :status is received, and we store it to
|
---|
584 | stream->status_code */
|
---|
585 | DEBUGASSERT(stream->status_code != -1);
|
---|
586 |
|
---|
587 | /* Only final status code signals the end of header */
|
---|
588 | if(stream->status_code / 100 != 1) {
|
---|
589 | stream->bodystarted = TRUE;
|
---|
590 | stream->status_code = -1;
|
---|
591 | }
|
---|
592 |
|
---|
593 | Curl_add_buffer(stream->header_recvbuf, "\r\n", 2);
|
---|
594 |
|
---|
595 | left = stream->header_recvbuf->size_used - stream->nread_header_recvbuf;
|
---|
596 | ncopy = MIN(stream->len, left);
|
---|
597 |
|
---|
598 | memcpy(&stream->mem[stream->memlen],
|
---|
599 | stream->header_recvbuf->buffer + stream->nread_header_recvbuf,
|
---|
600 | ncopy);
|
---|
601 | stream->nread_header_recvbuf += ncopy;
|
---|
602 |
|
---|
603 | DEBUGF(infof(data_s, "Store %zu bytes headers from stream %u at %p\n",
|
---|
604 | ncopy, stream_id, stream->mem));
|
---|
605 |
|
---|
606 | stream->len -= ncopy;
|
---|
607 | stream->memlen += ncopy;
|
---|
608 |
|
---|
609 | data_s->state.drain++;
|
---|
610 | httpc->drain_total++;
|
---|
611 | {
|
---|
612 | /* get the pointer from userp again since it was re-assigned above */
|
---|
613 | struct connectdata *conn_s = (struct connectdata *)userp;
|
---|
614 |
|
---|
615 | /* if we receive data for another handle, wake that up */
|
---|
616 | if(conn_s->data != data_s)
|
---|
617 | Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
|
---|
618 | }
|
---|
619 | break;
|
---|
620 | case NGHTTP2_PUSH_PROMISE:
|
---|
621 | rv = push_promise(data_s, conn, &frame->push_promise);
|
---|
622 | if(rv) { /* deny! */
|
---|
623 | rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
|
---|
624 | frame->push_promise.promised_stream_id,
|
---|
625 | NGHTTP2_CANCEL);
|
---|
626 | if(nghttp2_is_fatal(rv)) {
|
---|
627 | return rv;
|
---|
628 | }
|
---|
629 | }
|
---|
630 | break;
|
---|
631 | default:
|
---|
632 | DEBUGF(infof(conn->data, "Got frame type %x for stream %u!\n",
|
---|
633 | frame->hd.type, stream_id));
|
---|
634 | break;
|
---|
635 | }
|
---|
636 | return 0;
|
---|
637 | }
|
---|
638 |
|
---|
639 | static int on_invalid_frame_recv(nghttp2_session *session,
|
---|
640 | const nghttp2_frame *frame,
|
---|
641 | int lib_error_code, void *userp)
|
---|
642 | {
|
---|
643 | struct Curl_easy *data_s = NULL;
|
---|
644 | (void)userp;
|
---|
645 | #if !defined(DEBUGBUILD) || defined(CURL_DISABLE_VERBOSE_STRINGS)
|
---|
646 | (void)lib_error_code;
|
---|
647 | #endif
|
---|
648 |
|
---|
649 | data_s = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
|
---|
650 | if(data_s) {
|
---|
651 | DEBUGF(infof(data_s,
|
---|
652 | "on_invalid_frame_recv() was called, error=%d:%s\n",
|
---|
653 | lib_error_code, nghttp2_strerror(lib_error_code)));
|
---|
654 | }
|
---|
655 | return 0;
|
---|
656 | }
|
---|
657 |
|
---|
658 | static int on_data_chunk_recv(nghttp2_session *session, uint8_t flags,
|
---|
659 | int32_t stream_id,
|
---|
660 | const uint8_t *data, size_t len, void *userp)
|
---|
661 | {
|
---|
662 | struct HTTP *stream;
|
---|
663 | struct Curl_easy *data_s;
|
---|
664 | size_t nread;
|
---|
665 | struct connectdata *conn = (struct connectdata *)userp;
|
---|
666 | (void)session;
|
---|
667 | (void)flags;
|
---|
668 | (void)data;
|
---|
669 |
|
---|
670 | DEBUGASSERT(stream_id); /* should never be a zero stream ID here */
|
---|
671 |
|
---|
672 | /* get the stream from the hash based on Stream ID */
|
---|
673 | data_s = nghttp2_session_get_stream_user_data(session, stream_id);
|
---|
674 | if(!data_s)
|
---|
675 | /* Receiving a Stream ID not in the hash should not happen, this is an
|
---|
676 | internal error more than anything else! */
|
---|
677 | return NGHTTP2_ERR_CALLBACK_FAILURE;
|
---|
678 |
|
---|
679 | stream = data_s->req.protop;
|
---|
680 | if(!stream)
|
---|
681 | return NGHTTP2_ERR_CALLBACK_FAILURE;
|
---|
682 |
|
---|
683 | nread = MIN(stream->len, len);
|
---|
684 | memcpy(&stream->mem[stream->memlen], data, nread);
|
---|
685 |
|
---|
686 | stream->len -= nread;
|
---|
687 | stream->memlen += nread;
|
---|
688 |
|
---|
689 | data_s->state.drain++;
|
---|
690 | conn->proto.httpc.drain_total++;
|
---|
691 |
|
---|
692 | /* if we receive data for another handle, wake that up */
|
---|
693 | if(conn->data != data_s)
|
---|
694 | Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
|
---|
695 |
|
---|
696 | DEBUGF(infof(data_s, "%zu data received for stream %u "
|
---|
697 | "(%zu left in buffer %p, total %zu)\n",
|
---|
698 | nread, stream_id,
|
---|
699 | stream->len, stream->mem,
|
---|
700 | stream->memlen));
|
---|
701 |
|
---|
702 | if(nread < len) {
|
---|
703 | stream->pausedata = data + nread;
|
---|
704 | stream->pauselen = len - nread;
|
---|
705 | DEBUGF(infof(data_s, "NGHTTP2_ERR_PAUSE - %zu bytes out of buffer"
|
---|
706 | ", stream %u\n",
|
---|
707 | len - nread, stream_id));
|
---|
708 | data_s->easy_conn->proto.httpc.pause_stream_id = stream_id;
|
---|
709 |
|
---|
710 | return NGHTTP2_ERR_PAUSE;
|
---|
711 | }
|
---|
712 |
|
---|
713 | /* pause execution of nghttp2 if we received data for another handle
|
---|
714 | in order to process them first. */
|
---|
715 | if(conn->data != data_s) {
|
---|
716 | data_s->easy_conn->proto.httpc.pause_stream_id = stream_id;
|
---|
717 |
|
---|
718 | return NGHTTP2_ERR_PAUSE;
|
---|
719 | }
|
---|
720 |
|
---|
721 | return 0;
|
---|
722 | }
|
---|
723 |
|
---|
724 | static int before_frame_send(nghttp2_session *session,
|
---|
725 | const nghttp2_frame *frame,
|
---|
726 | void *userp)
|
---|
727 | {
|
---|
728 | struct Curl_easy *data_s;
|
---|
729 | (void)userp;
|
---|
730 |
|
---|
731 | data_s = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
|
---|
732 | if(data_s) {
|
---|
733 | DEBUGF(infof(data_s, "before_frame_send() was called\n"));
|
---|
734 | }
|
---|
735 |
|
---|
736 | return 0;
|
---|
737 | }
|
---|
738 | static int on_frame_send(nghttp2_session *session,
|
---|
739 | const nghttp2_frame *frame,
|
---|
740 | void *userp)
|
---|
741 | {
|
---|
742 | struct Curl_easy *data_s;
|
---|
743 | (void)userp;
|
---|
744 |
|
---|
745 | data_s = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
|
---|
746 | if(data_s) {
|
---|
747 | DEBUGF(infof(data_s, "on_frame_send() was called, length = %zd\n",
|
---|
748 | frame->hd.length));
|
---|
749 | }
|
---|
750 | return 0;
|
---|
751 | }
|
---|
752 | static int on_frame_not_send(nghttp2_session *session,
|
---|
753 | const nghttp2_frame *frame,
|
---|
754 | int lib_error_code, void *userp)
|
---|
755 | {
|
---|
756 | struct Curl_easy *data_s;
|
---|
757 | (void)userp;
|
---|
758 | #if !defined(DEBUGBUILD) || defined(CURL_DISABLE_VERBOSE_STRINGS)
|
---|
759 | (void)lib_error_code;
|
---|
760 | #endif
|
---|
761 |
|
---|
762 | data_s = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
|
---|
763 | if(data_s) {
|
---|
764 | DEBUGF(infof(data_s,
|
---|
765 | "on_frame_not_send() was called, lib_error_code = %d\n",
|
---|
766 | lib_error_code));
|
---|
767 | }
|
---|
768 | return 0;
|
---|
769 | }
|
---|
770 | static int on_stream_close(nghttp2_session *session, int32_t stream_id,
|
---|
771 | uint32_t error_code, void *userp)
|
---|
772 | {
|
---|
773 | struct Curl_easy *data_s;
|
---|
774 | struct HTTP *stream;
|
---|
775 | struct connectdata *conn = (struct connectdata *)userp;
|
---|
776 | (void)session;
|
---|
777 | (void)stream_id;
|
---|
778 |
|
---|
779 | if(stream_id) {
|
---|
780 | /* get the stream from the hash based on Stream ID, stream ID zero is for
|
---|
781 | connection-oriented stuff */
|
---|
782 | data_s = nghttp2_session_get_stream_user_data(session, stream_id);
|
---|
783 | if(!data_s) {
|
---|
784 | /* We could get stream ID not in the hash. For example, if we
|
---|
785 | decided to reject stream (e.g., PUSH_PROMISE). */
|
---|
786 | return 0;
|
---|
787 | }
|
---|
788 | DEBUGF(infof(data_s, "on_stream_close(), %s (err %d), stream %u\n",
|
---|
789 | Curl_http2_strerror(error_code), error_code, stream_id));
|
---|
790 | stream = data_s->req.protop;
|
---|
791 | if(!stream)
|
---|
792 | return NGHTTP2_ERR_CALLBACK_FAILURE;
|
---|
793 |
|
---|
794 | stream->error_code = error_code;
|
---|
795 | stream->closed = TRUE;
|
---|
796 | data_s->state.drain++;
|
---|
797 | conn->proto.httpc.drain_total++;
|
---|
798 |
|
---|
799 | /* remove the entry from the hash as the stream is now gone */
|
---|
800 | nghttp2_session_set_stream_user_data(session, stream_id, 0);
|
---|
801 | DEBUGF(infof(data_s, "Removed stream %u hash!\n", stream_id));
|
---|
802 | }
|
---|
803 | return 0;
|
---|
804 | }
|
---|
805 |
|
---|
806 | static int on_begin_headers(nghttp2_session *session,
|
---|
807 | const nghttp2_frame *frame, void *userp)
|
---|
808 | {
|
---|
809 | struct HTTP *stream;
|
---|
810 | struct Curl_easy *data_s = NULL;
|
---|
811 | (void)userp;
|
---|
812 |
|
---|
813 | data_s = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
|
---|
814 | if(!data_s) {
|
---|
815 | return 0;
|
---|
816 | }
|
---|
817 |
|
---|
818 | DEBUGF(infof(data_s, "on_begin_headers() was called\n"));
|
---|
819 |
|
---|
820 | if(frame->hd.type != NGHTTP2_HEADERS) {
|
---|
821 | return 0;
|
---|
822 | }
|
---|
823 |
|
---|
824 | stream = data_s->req.protop;
|
---|
825 | if(!stream || !stream->bodystarted) {
|
---|
826 | return 0;
|
---|
827 | }
|
---|
828 |
|
---|
829 | /* This is trailer HEADERS started. Allocate buffer for them. */
|
---|
830 | DEBUGF(infof(data_s, "trailer field started\n"));
|
---|
831 |
|
---|
832 | DEBUGASSERT(stream->trailer_recvbuf == NULL);
|
---|
833 |
|
---|
834 | stream->trailer_recvbuf = Curl_add_buffer_init();
|
---|
835 | if(!stream->trailer_recvbuf) {
|
---|
836 | return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
|
---|
837 | }
|
---|
838 |
|
---|
839 | return 0;
|
---|
840 | }
|
---|
841 |
|
---|
842 | /* Decode HTTP status code. Returns -1 if no valid status code was
|
---|
843 | decoded. */
|
---|
844 | static int decode_status_code(const uint8_t *value, size_t len)
|
---|
845 | {
|
---|
846 | int i;
|
---|
847 | int res;
|
---|
848 |
|
---|
849 | if(len != 3) {
|
---|
850 | return -1;
|
---|
851 | }
|
---|
852 |
|
---|
853 | res = 0;
|
---|
854 |
|
---|
855 | for(i = 0; i < 3; ++i) {
|
---|
856 | char c = value[i];
|
---|
857 |
|
---|
858 | if(c < '0' || c > '9') {
|
---|
859 | return -1;
|
---|
860 | }
|
---|
861 |
|
---|
862 | res *= 10;
|
---|
863 | res += c - '0';
|
---|
864 | }
|
---|
865 |
|
---|
866 | return res;
|
---|
867 | }
|
---|
868 |
|
---|
869 | /* frame->hd.type is either NGHTTP2_HEADERS or NGHTTP2_PUSH_PROMISE */
|
---|
870 | static int on_header(nghttp2_session *session, const nghttp2_frame *frame,
|
---|
871 | const uint8_t *name, size_t namelen,
|
---|
872 | const uint8_t *value, size_t valuelen,
|
---|
873 | uint8_t flags,
|
---|
874 | void *userp)
|
---|
875 | {
|
---|
876 | struct HTTP *stream;
|
---|
877 | struct Curl_easy *data_s;
|
---|
878 | int32_t stream_id = frame->hd.stream_id;
|
---|
879 | struct connectdata *conn = (struct connectdata *)userp;
|
---|
880 | (void)flags;
|
---|
881 |
|
---|
882 | DEBUGASSERT(stream_id); /* should never be a zero stream ID here */
|
---|
883 |
|
---|
884 | /* get the stream from the hash based on Stream ID */
|
---|
885 | data_s = nghttp2_session_get_stream_user_data(session, stream_id);
|
---|
886 | if(!data_s)
|
---|
887 | /* Receiving a Stream ID not in the hash should not happen, this is an
|
---|
888 | internal error more than anything else! */
|
---|
889 | return NGHTTP2_ERR_CALLBACK_FAILURE;
|
---|
890 |
|
---|
891 | stream = data_s->req.protop;
|
---|
892 | if(!stream) {
|
---|
893 | failf(data_s, "Internal NULL stream! 5\n");
|
---|
894 | return NGHTTP2_ERR_CALLBACK_FAILURE;
|
---|
895 | }
|
---|
896 |
|
---|
897 | /* Store received PUSH_PROMISE headers to be used when the subsequent
|
---|
898 | PUSH_PROMISE callback comes */
|
---|
899 | if(frame->hd.type == NGHTTP2_PUSH_PROMISE) {
|
---|
900 | char *h;
|
---|
901 |
|
---|
902 | if(!stream->push_headers) {
|
---|
903 | stream->push_headers_alloc = 10;
|
---|
904 | stream->push_headers = malloc(stream->push_headers_alloc *
|
---|
905 | sizeof(char *));
|
---|
906 | stream->push_headers_used = 0;
|
---|
907 | }
|
---|
908 | else if(stream->push_headers_used ==
|
---|
909 | stream->push_headers_alloc) {
|
---|
910 | char **headp;
|
---|
911 | stream->push_headers_alloc *= 2;
|
---|
912 | headp = Curl_saferealloc(stream->push_headers,
|
---|
913 | stream->push_headers_alloc * sizeof(char *));
|
---|
914 | if(!headp) {
|
---|
915 | stream->push_headers = NULL;
|
---|
916 | return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
|
---|
917 | }
|
---|
918 | stream->push_headers = headp;
|
---|
919 | }
|
---|
920 | h = aprintf("%s:%s", name, value);
|
---|
921 | if(h)
|
---|
922 | stream->push_headers[stream->push_headers_used++] = h;
|
---|
923 | return 0;
|
---|
924 | }
|
---|
925 |
|
---|
926 | if(stream->bodystarted) {
|
---|
927 | /* This is trailer fields. */
|
---|
928 | /* 3 is for ":" and "\r\n". */
|
---|
929 | uint32_t n = (uint32_t)(namelen + valuelen + 3);
|
---|
930 |
|
---|
931 | DEBUGF(infof(data_s, "h2 trailer: %.*s: %.*s\n", namelen, name, valuelen,
|
---|
932 | value));
|
---|
933 |
|
---|
934 | Curl_add_buffer(stream->trailer_recvbuf, &n, sizeof(n));
|
---|
935 | Curl_add_buffer(stream->trailer_recvbuf, name, namelen);
|
---|
936 | Curl_add_buffer(stream->trailer_recvbuf, ": ", 2);
|
---|
937 | Curl_add_buffer(stream->trailer_recvbuf, value, valuelen);
|
---|
938 | Curl_add_buffer(stream->trailer_recvbuf, "\r\n\0", 3);
|
---|
939 |
|
---|
940 | return 0;
|
---|
941 | }
|
---|
942 |
|
---|
943 | if(namelen == sizeof(":status") - 1 &&
|
---|
944 | memcmp(":status", name, namelen) == 0) {
|
---|
945 | /* nghttp2 guarantees :status is received first and only once, and
|
---|
946 | value is 3 digits status code, and decode_status_code always
|
---|
947 | succeeds. */
|
---|
948 | stream->status_code = decode_status_code(value, valuelen);
|
---|
949 | DEBUGASSERT(stream->status_code != -1);
|
---|
950 |
|
---|
951 | Curl_add_buffer(stream->header_recvbuf, "HTTP/2 ", 7);
|
---|
952 | Curl_add_buffer(stream->header_recvbuf, value, valuelen);
|
---|
953 | /* the space character after the status code is mandatory */
|
---|
954 | Curl_add_buffer(stream->header_recvbuf, " \r\n", 3);
|
---|
955 | /* if we receive data for another handle, wake that up */
|
---|
956 | if(conn->data != data_s)
|
---|
957 | Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
|
---|
958 |
|
---|
959 | DEBUGF(infof(data_s, "h2 status: HTTP/2 %03d (easy %p)\n",
|
---|
960 | stream->status_code, data_s));
|
---|
961 | return 0;
|
---|
962 | }
|
---|
963 |
|
---|
964 | /* nghttp2 guarantees that namelen > 0, and :status was already
|
---|
965 | received, and this is not pseudo-header field . */
|
---|
966 | /* convert to a HTTP1-style header */
|
---|
967 | Curl_add_buffer(stream->header_recvbuf, name, namelen);
|
---|
968 | Curl_add_buffer(stream->header_recvbuf, ": ", 2);
|
---|
969 | Curl_add_buffer(stream->header_recvbuf, value, valuelen);
|
---|
970 | Curl_add_buffer(stream->header_recvbuf, "\r\n", 2);
|
---|
971 | /* if we receive data for another handle, wake that up */
|
---|
972 | if(conn->data != data_s)
|
---|
973 | Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
|
---|
974 |
|
---|
975 | DEBUGF(infof(data_s, "h2 header: %.*s: %.*s\n", namelen, name, valuelen,
|
---|
976 | value));
|
---|
977 |
|
---|
978 | return 0; /* 0 is successful */
|
---|
979 | }
|
---|
980 |
|
---|
981 | static ssize_t data_source_read_callback(nghttp2_session *session,
|
---|
982 | int32_t stream_id,
|
---|
983 | uint8_t *buf, size_t length,
|
---|
984 | uint32_t *data_flags,
|
---|
985 | nghttp2_data_source *source,
|
---|
986 | void *userp)
|
---|
987 | {
|
---|
988 | struct Curl_easy *data_s;
|
---|
989 | struct HTTP *stream = NULL;
|
---|
990 | size_t nread;
|
---|
991 | (void)source;
|
---|
992 | (void)userp;
|
---|
993 |
|
---|
994 | if(stream_id) {
|
---|
995 | /* get the stream from the hash based on Stream ID, stream ID zero is for
|
---|
996 | connection-oriented stuff */
|
---|
997 | data_s = nghttp2_session_get_stream_user_data(session, stream_id);
|
---|
998 | if(!data_s)
|
---|
999 | /* Receiving a Stream ID not in the hash should not happen, this is an
|
---|
1000 | internal error more than anything else! */
|
---|
1001 | return NGHTTP2_ERR_CALLBACK_FAILURE;
|
---|
1002 |
|
---|
1003 | stream = data_s->req.protop;
|
---|
1004 | if(!stream)
|
---|
1005 | return NGHTTP2_ERR_CALLBACK_FAILURE;
|
---|
1006 | }
|
---|
1007 | else
|
---|
1008 | return NGHTTP2_ERR_INVALID_ARGUMENT;
|
---|
1009 |
|
---|
1010 | nread = MIN(stream->upload_len, length);
|
---|
1011 | if(nread > 0) {
|
---|
1012 | memcpy(buf, stream->upload_mem, nread);
|
---|
1013 | stream->upload_mem += nread;
|
---|
1014 | stream->upload_len -= nread;
|
---|
1015 | if(data_s->state.infilesize != -1)
|
---|
1016 | stream->upload_left -= nread;
|
---|
1017 | }
|
---|
1018 |
|
---|
1019 | if(stream->upload_left == 0)
|
---|
1020 | *data_flags = NGHTTP2_DATA_FLAG_EOF;
|
---|
1021 | else if(nread == 0)
|
---|
1022 | return NGHTTP2_ERR_DEFERRED;
|
---|
1023 |
|
---|
1024 | DEBUGF(infof(data_s, "data_source_read_callback: "
|
---|
1025 | "returns %zu bytes stream %u\n",
|
---|
1026 | nread, stream_id));
|
---|
1027 |
|
---|
1028 | return nread;
|
---|
1029 | }
|
---|
1030 |
|
---|
1031 | #define H2_BUFSIZE 32768
|
---|
1032 |
|
---|
1033 | #ifdef NGHTTP2_HAS_ERROR_CALLBACK
|
---|
1034 | static int error_callback(nghttp2_session *session,
|
---|
1035 | const char *msg,
|
---|
1036 | size_t len,
|
---|
1037 | void *userp)
|
---|
1038 | {
|
---|
1039 | struct connectdata *conn = (struct connectdata *)userp;
|
---|
1040 | (void)session;
|
---|
1041 | infof(conn->data, "http2 error: %.*s\n", len, msg);
|
---|
1042 | return 0;
|
---|
1043 | }
|
---|
1044 | #endif
|
---|
1045 |
|
---|
1046 | static void populate_settings(struct connectdata *conn,
|
---|
1047 | struct http_conn *httpc)
|
---|
1048 | {
|
---|
1049 | nghttp2_settings_entry *iv = httpc->local_settings;
|
---|
1050 |
|
---|
1051 | iv[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
|
---|
1052 | iv[0].value = 100;
|
---|
1053 |
|
---|
1054 | iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
|
---|
1055 | iv[1].value = HTTP2_HUGE_WINDOW_SIZE;
|
---|
1056 |
|
---|
1057 | iv[2].settings_id = NGHTTP2_SETTINGS_ENABLE_PUSH;
|
---|
1058 | iv[2].value = conn->data->multi->push_cb != NULL;
|
---|
1059 |
|
---|
1060 | httpc->local_settings_num = 3;
|
---|
1061 | }
|
---|
1062 |
|
---|
1063 | void Curl_http2_done(struct connectdata *conn, bool premature)
|
---|
1064 | {
|
---|
1065 | struct Curl_easy *data = conn->data;
|
---|
1066 | struct HTTP *http = data->req.protop;
|
---|
1067 | struct http_conn *httpc = &conn->proto.httpc;
|
---|
1068 |
|
---|
1069 | if(http->header_recvbuf) {
|
---|
1070 | DEBUGF(infof(data, "free header_recvbuf!!\n"));
|
---|
1071 | Curl_add_buffer_free(http->header_recvbuf);
|
---|
1072 | http->header_recvbuf = NULL; /* clear the pointer */
|
---|
1073 | Curl_add_buffer_free(http->trailer_recvbuf);
|
---|
1074 | http->trailer_recvbuf = NULL; /* clear the pointer */
|
---|
1075 | if(http->push_headers) {
|
---|
1076 | /* if they weren't used and then freed before */
|
---|
1077 | for(; http->push_headers_used > 0; --http->push_headers_used) {
|
---|
1078 | free(http->push_headers[http->push_headers_used - 1]);
|
---|
1079 | }
|
---|
1080 | free(http->push_headers);
|
---|
1081 | http->push_headers = NULL;
|
---|
1082 | }
|
---|
1083 | }
|
---|
1084 |
|
---|
1085 | if(premature) {
|
---|
1086 | /* RST_STREAM */
|
---|
1087 | nghttp2_submit_rst_stream(httpc->h2, NGHTTP2_FLAG_NONE, http->stream_id,
|
---|
1088 | NGHTTP2_STREAM_CLOSED);
|
---|
1089 | if(http->stream_id == httpc->pause_stream_id) {
|
---|
1090 | infof(data, "stopped the pause stream!\n");
|
---|
1091 | httpc->pause_stream_id = 0;
|
---|
1092 | }
|
---|
1093 | }
|
---|
1094 | if(http->stream_id) {
|
---|
1095 | nghttp2_session_set_stream_user_data(httpc->h2, http->stream_id, 0);
|
---|
1096 | http->stream_id = 0;
|
---|
1097 | }
|
---|
1098 | }
|
---|
1099 |
|
---|
1100 | /*
|
---|
1101 | * Initialize nghttp2 for a Curl connection
|
---|
1102 | */
|
---|
1103 | CURLcode Curl_http2_init(struct connectdata *conn)
|
---|
1104 | {
|
---|
1105 | if(!conn->proto.httpc.h2) {
|
---|
1106 | int rc;
|
---|
1107 | nghttp2_session_callbacks *callbacks;
|
---|
1108 |
|
---|
1109 | conn->proto.httpc.inbuf = malloc(H2_BUFSIZE);
|
---|
1110 | if(conn->proto.httpc.inbuf == NULL)
|
---|
1111 | return CURLE_OUT_OF_MEMORY;
|
---|
1112 |
|
---|
1113 | rc = nghttp2_session_callbacks_new(&callbacks);
|
---|
1114 |
|
---|
1115 | if(rc) {
|
---|
1116 | failf(conn->data, "Couldn't initialize nghttp2 callbacks!");
|
---|
1117 | return CURLE_OUT_OF_MEMORY; /* most likely at least */
|
---|
1118 | }
|
---|
1119 |
|
---|
1120 | /* nghttp2_send_callback */
|
---|
1121 | nghttp2_session_callbacks_set_send_callback(callbacks, send_callback);
|
---|
1122 | /* nghttp2_on_frame_recv_callback */
|
---|
1123 | nghttp2_session_callbacks_set_on_frame_recv_callback
|
---|
1124 | (callbacks, on_frame_recv);
|
---|
1125 | /* nghttp2_on_invalid_frame_recv_callback */
|
---|
1126 | nghttp2_session_callbacks_set_on_invalid_frame_recv_callback
|
---|
1127 | (callbacks, on_invalid_frame_recv);
|
---|
1128 | /* nghttp2_on_data_chunk_recv_callback */
|
---|
1129 | nghttp2_session_callbacks_set_on_data_chunk_recv_callback
|
---|
1130 | (callbacks, on_data_chunk_recv);
|
---|
1131 | /* nghttp2_before_frame_send_callback */
|
---|
1132 | nghttp2_session_callbacks_set_before_frame_send_callback
|
---|
1133 | (callbacks, before_frame_send);
|
---|
1134 | /* nghttp2_on_frame_send_callback */
|
---|
1135 | nghttp2_session_callbacks_set_on_frame_send_callback
|
---|
1136 | (callbacks, on_frame_send);
|
---|
1137 | /* nghttp2_on_frame_not_send_callback */
|
---|
1138 | nghttp2_session_callbacks_set_on_frame_not_send_callback
|
---|
1139 | (callbacks, on_frame_not_send);
|
---|
1140 | /* nghttp2_on_stream_close_callback */
|
---|
1141 | nghttp2_session_callbacks_set_on_stream_close_callback
|
---|
1142 | (callbacks, on_stream_close);
|
---|
1143 | /* nghttp2_on_begin_headers_callback */
|
---|
1144 | nghttp2_session_callbacks_set_on_begin_headers_callback
|
---|
1145 | (callbacks, on_begin_headers);
|
---|
1146 | /* nghttp2_on_header_callback */
|
---|
1147 | nghttp2_session_callbacks_set_on_header_callback(callbacks, on_header);
|
---|
1148 |
|
---|
1149 | nghttp2_session_callbacks_set_error_callback(callbacks, error_callback);
|
---|
1150 |
|
---|
1151 | /* The nghttp2 session is not yet setup, do it */
|
---|
1152 | rc = nghttp2_session_client_new(&conn->proto.httpc.h2, callbacks, conn);
|
---|
1153 |
|
---|
1154 | nghttp2_session_callbacks_del(callbacks);
|
---|
1155 |
|
---|
1156 | if(rc) {
|
---|
1157 | failf(conn->data, "Couldn't initialize nghttp2!");
|
---|
1158 | return CURLE_OUT_OF_MEMORY; /* most likely at least */
|
---|
1159 | }
|
---|
1160 | }
|
---|
1161 | return CURLE_OK;
|
---|
1162 | }
|
---|
1163 |
|
---|
1164 | /*
|
---|
1165 | * Append headers to ask for a HTTP1.1 to HTTP2 upgrade.
|
---|
1166 | */
|
---|
1167 | CURLcode Curl_http2_request_upgrade(Curl_send_buffer *req,
|
---|
1168 | struct connectdata *conn)
|
---|
1169 | {
|
---|
1170 | CURLcode result;
|
---|
1171 | ssize_t binlen;
|
---|
1172 | char *base64;
|
---|
1173 | size_t blen;
|
---|
1174 | struct SingleRequest *k = &conn->data->req;
|
---|
1175 | uint8_t *binsettings = conn->proto.httpc.binsettings;
|
---|
1176 | struct http_conn *httpc = &conn->proto.httpc;
|
---|
1177 |
|
---|
1178 | populate_settings(conn, httpc);
|
---|
1179 |
|
---|
1180 | /* this returns number of bytes it wrote */
|
---|
1181 | binlen = nghttp2_pack_settings_payload(binsettings, H2_BINSETTINGS_LEN,
|
---|
1182 | httpc->local_settings,
|
---|
1183 | httpc->local_settings_num);
|
---|
1184 | if(!binlen) {
|
---|
1185 | failf(conn->data, "nghttp2 unexpectedly failed on pack_settings_payload");
|
---|
1186 | Curl_add_buffer_free(req);
|
---|
1187 | return CURLE_FAILED_INIT;
|
---|
1188 | }
|
---|
1189 | conn->proto.httpc.binlen = binlen;
|
---|
1190 |
|
---|
1191 | result = Curl_base64url_encode(conn->data, (const char *)binsettings, binlen,
|
---|
1192 | &base64, &blen);
|
---|
1193 | if(result) {
|
---|
1194 | Curl_add_buffer_free(req);
|
---|
1195 | return result;
|
---|
1196 | }
|
---|
1197 |
|
---|
1198 | result = Curl_add_bufferf(req,
|
---|
1199 | "Connection: Upgrade, HTTP2-Settings\r\n"
|
---|
1200 | "Upgrade: %s\r\n"
|
---|
1201 | "HTTP2-Settings: %s\r\n",
|
---|
1202 | NGHTTP2_CLEARTEXT_PROTO_VERSION_ID, base64);
|
---|
1203 | free(base64);
|
---|
1204 |
|
---|
1205 | k->upgr101 = UPGR101_REQUESTED;
|
---|
1206 |
|
---|
1207 | return result;
|
---|
1208 | }
|
---|
1209 |
|
---|
1210 | /*
|
---|
1211 | * Returns nonzero if current HTTP/2 session should be closed.
|
---|
1212 | */
|
---|
1213 | static int should_close_session(struct http_conn *httpc)
|
---|
1214 | {
|
---|
1215 | return httpc->drain_total == 0 && !nghttp2_session_want_read(httpc->h2) &&
|
---|
1216 | !nghttp2_session_want_write(httpc->h2);
|
---|
1217 | }
|
---|
1218 |
|
---|
1219 | static int h2_session_send(struct Curl_easy *data,
|
---|
1220 | nghttp2_session *h2);
|
---|
1221 |
|
---|
1222 | /*
|
---|
1223 | * h2_process_pending_input() processes pending input left in
|
---|
1224 | * httpc->inbuf. Then, call h2_session_send() to send pending data.
|
---|
1225 | * This function returns 0 if it succeeds, or -1 and error code will
|
---|
1226 | * be assigned to *err.
|
---|
1227 | */
|
---|
1228 | static int h2_process_pending_input(struct Curl_easy *data,
|
---|
1229 | struct http_conn *httpc,
|
---|
1230 | CURLcode *err)
|
---|
1231 | {
|
---|
1232 | ssize_t nread;
|
---|
1233 | char *inbuf;
|
---|
1234 | ssize_t rv;
|
---|
1235 |
|
---|
1236 | nread = httpc->inbuflen - httpc->nread_inbuf;
|
---|
1237 | inbuf = httpc->inbuf + httpc->nread_inbuf;
|
---|
1238 |
|
---|
1239 | rv = nghttp2_session_mem_recv(httpc->h2, (const uint8_t *)inbuf, nread);
|
---|
1240 | if(rv < 0) {
|
---|
1241 | failf(data,
|
---|
1242 | "h2_process_pending_input: nghttp2_session_mem_recv() returned "
|
---|
1243 | "%d:%s\n", rv, nghttp2_strerror((int)rv));
|
---|
1244 | *err = CURLE_RECV_ERROR;
|
---|
1245 | return -1;
|
---|
1246 | }
|
---|
1247 |
|
---|
1248 | if(nread == rv) {
|
---|
1249 | DEBUGF(infof(data,
|
---|
1250 | "h2_process_pending_input: All data in connection buffer "
|
---|
1251 | "processed\n"));
|
---|
1252 | httpc->inbuflen = 0;
|
---|
1253 | httpc->nread_inbuf = 0;
|
---|
1254 | }
|
---|
1255 | else {
|
---|
1256 | httpc->nread_inbuf += rv;
|
---|
1257 | DEBUGF(infof(data,
|
---|
1258 | "h2_process_pending_input: %zu bytes left in connection "
|
---|
1259 | "buffer\n",
|
---|
1260 | httpc->inbuflen - httpc->nread_inbuf));
|
---|
1261 | }
|
---|
1262 |
|
---|
1263 | rv = h2_session_send(data, httpc->h2);
|
---|
1264 | if(rv != 0) {
|
---|
1265 | *err = CURLE_SEND_ERROR;
|
---|
1266 | return -1;
|
---|
1267 | }
|
---|
1268 |
|
---|
1269 | if(should_close_session(httpc)) {
|
---|
1270 | DEBUGF(infof(data,
|
---|
1271 | "h2_process_pending_input: nothing to do in this session\n"));
|
---|
1272 | *err = CURLE_HTTP2;
|
---|
1273 | return -1;
|
---|
1274 | }
|
---|
1275 |
|
---|
1276 | return 0;
|
---|
1277 | }
|
---|
1278 |
|
---|
1279 | /*
|
---|
1280 | * Called from transfer.c:done_sending when we stop uploading.
|
---|
1281 | */
|
---|
1282 | CURLcode Curl_http2_done_sending(struct connectdata *conn)
|
---|
1283 | {
|
---|
1284 | CURLcode result = CURLE_OK;
|
---|
1285 |
|
---|
1286 | if((conn->handler == &Curl_handler_http2_ssl) ||
|
---|
1287 | (conn->handler == &Curl_handler_http2)) {
|
---|
1288 | /* make sure this is only attempted for HTTP/2 transfers */
|
---|
1289 |
|
---|
1290 | struct HTTP *stream = conn->data->req.protop;
|
---|
1291 |
|
---|
1292 | if(stream->upload_left) {
|
---|
1293 | /* If the stream still thinks there's data left to upload. */
|
---|
1294 | struct http_conn *httpc = &conn->proto.httpc;
|
---|
1295 | nghttp2_session *h2 = httpc->h2;
|
---|
1296 |
|
---|
1297 | stream->upload_left = 0; /* DONE! */
|
---|
1298 |
|
---|
1299 | /* resume sending here to trigger the callback to get called again so
|
---|
1300 | that it can signal EOF to nghttp2 */
|
---|
1301 | (void)nghttp2_session_resume_data(h2, stream->stream_id);
|
---|
1302 |
|
---|
1303 | (void)h2_process_pending_input(conn->data, httpc, &result);
|
---|
1304 | }
|
---|
1305 | }
|
---|
1306 | return result;
|
---|
1307 | }
|
---|
1308 |
|
---|
1309 |
|
---|
1310 | static ssize_t http2_handle_stream_close(struct connectdata *conn,
|
---|
1311 | struct Curl_easy *data,
|
---|
1312 | struct HTTP *stream, CURLcode *err)
|
---|
1313 | {
|
---|
1314 | char *trailer_pos, *trailer_end;
|
---|
1315 | CURLcode result;
|
---|
1316 | struct http_conn *httpc = &conn->proto.httpc;
|
---|
1317 |
|
---|
1318 | if(httpc->pause_stream_id == stream->stream_id) {
|
---|
1319 | httpc->pause_stream_id = 0;
|
---|
1320 | }
|
---|
1321 |
|
---|
1322 | DEBUGASSERT(httpc->drain_total >= data->state.drain);
|
---|
1323 | httpc->drain_total -= data->state.drain;
|
---|
1324 | data->state.drain = 0;
|
---|
1325 |
|
---|
1326 | if(httpc->pause_stream_id == 0) {
|
---|
1327 | if(h2_process_pending_input(data, httpc, err) != 0) {
|
---|
1328 | return -1;
|
---|
1329 | }
|
---|
1330 | }
|
---|
1331 |
|
---|
1332 | DEBUGASSERT(data->state.drain == 0);
|
---|
1333 |
|
---|
1334 | /* Reset to FALSE to prevent infinite loop in readwrite_data function. */
|
---|
1335 | stream->closed = FALSE;
|
---|
1336 | if(stream->error_code != NGHTTP2_NO_ERROR) {
|
---|
1337 | failf(data, "HTTP/2 stream %u was not closed cleanly: %s (err %d)",
|
---|
1338 | stream->stream_id, Curl_http2_strerror(stream->error_code),
|
---|
1339 | stream->error_code);
|
---|
1340 | *err = CURLE_HTTP2_STREAM;
|
---|
1341 | return -1;
|
---|
1342 | }
|
---|
1343 |
|
---|
1344 | if(!stream->bodystarted) {
|
---|
1345 | failf(data, "HTTP/2 stream %u was closed cleanly, but before getting "
|
---|
1346 | " all response header fields, teated as error",
|
---|
1347 | stream->stream_id);
|
---|
1348 | *err = CURLE_HTTP2_STREAM;
|
---|
1349 | return -1;
|
---|
1350 | }
|
---|
1351 |
|
---|
1352 | if(stream->trailer_recvbuf && stream->trailer_recvbuf->buffer) {
|
---|
1353 | trailer_pos = stream->trailer_recvbuf->buffer;
|
---|
1354 | trailer_end = trailer_pos + stream->trailer_recvbuf->size_used;
|
---|
1355 |
|
---|
1356 | for(; trailer_pos < trailer_end;) {
|
---|
1357 | uint32_t n;
|
---|
1358 | memcpy(&n, trailer_pos, sizeof(n));
|
---|
1359 | trailer_pos += sizeof(n);
|
---|
1360 |
|
---|
1361 | result = Curl_client_write(conn, CLIENTWRITE_HEADER, trailer_pos, n);
|
---|
1362 | if(result) {
|
---|
1363 | *err = result;
|
---|
1364 | return -1;
|
---|
1365 | }
|
---|
1366 |
|
---|
1367 | trailer_pos += n + 1;
|
---|
1368 | }
|
---|
1369 | }
|
---|
1370 |
|
---|
1371 | stream->close_handled = TRUE;
|
---|
1372 |
|
---|
1373 | DEBUGF(infof(data, "http2_recv returns 0, http2_handle_stream_close\n"));
|
---|
1374 | return 0;
|
---|
1375 | }
|
---|
1376 |
|
---|
1377 | /*
|
---|
1378 | * h2_pri_spec() fills in the pri_spec struct, used by nghttp2 to send weight
|
---|
1379 | * and dependency to the peer. It also stores the updated values in the state
|
---|
1380 | * struct.
|
---|
1381 | */
|
---|
1382 |
|
---|
1383 | static void h2_pri_spec(struct Curl_easy *data,
|
---|
1384 | nghttp2_priority_spec *pri_spec)
|
---|
1385 | {
|
---|
1386 | struct HTTP *depstream = (data->set.stream_depends_on?
|
---|
1387 | data->set.stream_depends_on->req.protop:NULL);
|
---|
1388 | int32_t depstream_id = depstream? depstream->stream_id:0;
|
---|
1389 | nghttp2_priority_spec_init(pri_spec, depstream_id, data->set.stream_weight,
|
---|
1390 | data->set.stream_depends_e);
|
---|
1391 | data->state.stream_weight = data->set.stream_weight;
|
---|
1392 | data->state.stream_depends_e = data->set.stream_depends_e;
|
---|
1393 | data->state.stream_depends_on = data->set.stream_depends_on;
|
---|
1394 | }
|
---|
1395 |
|
---|
1396 | /*
|
---|
1397 | * h2_session_send() checks if there's been an update in the priority /
|
---|
1398 | * dependency settings and if so it submits a PRIORITY frame with the updated
|
---|
1399 | * info.
|
---|
1400 | */
|
---|
1401 | static int h2_session_send(struct Curl_easy *data,
|
---|
1402 | nghttp2_session *h2)
|
---|
1403 | {
|
---|
1404 | struct HTTP *stream = data->req.protop;
|
---|
1405 | if((data->set.stream_weight != data->state.stream_weight) ||
|
---|
1406 | (data->set.stream_depends_e != data->state.stream_depends_e) ||
|
---|
1407 | (data->set.stream_depends_on != data->state.stream_depends_on) ) {
|
---|
1408 | /* send new weight and/or dependency */
|
---|
1409 | nghttp2_priority_spec pri_spec;
|
---|
1410 | int rv;
|
---|
1411 |
|
---|
1412 | h2_pri_spec(data, &pri_spec);
|
---|
1413 |
|
---|
1414 | DEBUGF(infof(data, "Queuing PRIORITY on stream %u (easy %p)\n",
|
---|
1415 | stream->stream_id, data));
|
---|
1416 | rv = nghttp2_submit_priority(h2, NGHTTP2_FLAG_NONE, stream->stream_id,
|
---|
1417 | &pri_spec);
|
---|
1418 | if(rv)
|
---|
1419 | return rv;
|
---|
1420 | }
|
---|
1421 |
|
---|
1422 | return nghttp2_session_send(h2);
|
---|
1423 | }
|
---|
1424 |
|
---|
1425 | static ssize_t http2_recv(struct connectdata *conn, int sockindex,
|
---|
1426 | char *mem, size_t len, CURLcode *err)
|
---|
1427 | {
|
---|
1428 | CURLcode result = CURLE_OK;
|
---|
1429 | ssize_t rv;
|
---|
1430 | ssize_t nread;
|
---|
1431 | struct http_conn *httpc = &conn->proto.httpc;
|
---|
1432 | struct Curl_easy *data = conn->data;
|
---|
1433 | struct HTTP *stream = data->req.protop;
|
---|
1434 |
|
---|
1435 | (void)sockindex; /* we always do HTTP2 on sockindex 0 */
|
---|
1436 |
|
---|
1437 | if(should_close_session(httpc)) {
|
---|
1438 | DEBUGF(infof(data,
|
---|
1439 | "http2_recv: nothing to do in this session\n"));
|
---|
1440 | *err = CURLE_HTTP2;
|
---|
1441 | return -1;
|
---|
1442 | }
|
---|
1443 |
|
---|
1444 | /* Nullify here because we call nghttp2_session_send() and they
|
---|
1445 | might refer to the old buffer. */
|
---|
1446 | stream->upload_mem = NULL;
|
---|
1447 | stream->upload_len = 0;
|
---|
1448 |
|
---|
1449 | /*
|
---|
1450 | * At this point 'stream' is just in the Curl_easy the connection
|
---|
1451 | * identifies as its owner at this time.
|
---|
1452 | */
|
---|
1453 |
|
---|
1454 | if(stream->bodystarted &&
|
---|
1455 | stream->nread_header_recvbuf < stream->header_recvbuf->size_used) {
|
---|
1456 | /* If there is body data pending for this stream to return, do that */
|
---|
1457 | size_t left =
|
---|
1458 | stream->header_recvbuf->size_used - stream->nread_header_recvbuf;
|
---|
1459 | size_t ncopy = MIN(len, left);
|
---|
1460 | memcpy(mem, stream->header_recvbuf->buffer + stream->nread_header_recvbuf,
|
---|
1461 | ncopy);
|
---|
1462 | stream->nread_header_recvbuf += ncopy;
|
---|
1463 |
|
---|
1464 | DEBUGF(infof(data, "http2_recv: Got %d bytes from header_recvbuf\n",
|
---|
1465 | (int)ncopy));
|
---|
1466 | return ncopy;
|
---|
1467 | }
|
---|
1468 |
|
---|
1469 | DEBUGF(infof(data, "http2_recv: easy %p (stream %u)\n",
|
---|
1470 | data, stream->stream_id));
|
---|
1471 |
|
---|
1472 | if((data->state.drain) && stream->memlen) {
|
---|
1473 | DEBUGF(infof(data, "http2_recv: DRAIN %zu bytes stream %u!! (%p => %p)\n",
|
---|
1474 | stream->memlen, stream->stream_id,
|
---|
1475 | stream->mem, mem));
|
---|
1476 | if(mem != stream->mem) {
|
---|
1477 | /* if we didn't get the same buffer this time, we must move the data to
|
---|
1478 | the beginning */
|
---|
1479 | memmove(mem, stream->mem, stream->memlen);
|
---|
1480 | stream->len = len - stream->memlen;
|
---|
1481 | stream->mem = mem;
|
---|
1482 | }
|
---|
1483 | if(httpc->pause_stream_id == stream->stream_id && !stream->pausedata) {
|
---|
1484 | /* We have paused nghttp2, but we have no pause data (see
|
---|
1485 | on_data_chunk_recv). */
|
---|
1486 | httpc->pause_stream_id = 0;
|
---|
1487 | if(h2_process_pending_input(data, httpc, &result) != 0) {
|
---|
1488 | *err = result;
|
---|
1489 | return -1;
|
---|
1490 | }
|
---|
1491 | }
|
---|
1492 | }
|
---|
1493 | else if(stream->pausedata) {
|
---|
1494 | DEBUGASSERT(httpc->pause_stream_id == stream->stream_id);
|
---|
1495 | nread = MIN(len, stream->pauselen);
|
---|
1496 | memcpy(mem, stream->pausedata, nread);
|
---|
1497 |
|
---|
1498 | stream->pausedata += nread;
|
---|
1499 | stream->pauselen -= nread;
|
---|
1500 |
|
---|
1501 | infof(data, "%zu data bytes written\n", nread);
|
---|
1502 | if(stream->pauselen == 0) {
|
---|
1503 | DEBUGF(infof(data, "Unpaused by stream %u\n", stream->stream_id));
|
---|
1504 | DEBUGASSERT(httpc->pause_stream_id == stream->stream_id);
|
---|
1505 | httpc->pause_stream_id = 0;
|
---|
1506 |
|
---|
1507 | stream->pausedata = NULL;
|
---|
1508 | stream->pauselen = 0;
|
---|
1509 |
|
---|
1510 | /* When NGHTTP2_ERR_PAUSE is returned from
|
---|
1511 | data_source_read_callback, we might not process DATA frame
|
---|
1512 | fully. Calling nghttp2_session_mem_recv() again will
|
---|
1513 | continue to process DATA frame, but if there is no incoming
|
---|
1514 | frames, then we have to call it again with 0-length data.
|
---|
1515 | Without this, on_stream_close callback will not be called,
|
---|
1516 | and stream could be hanged. */
|
---|
1517 | if(h2_process_pending_input(data, httpc, &result) != 0) {
|
---|
1518 | *err = result;
|
---|
1519 | return -1;
|
---|
1520 | }
|
---|
1521 | }
|
---|
1522 | DEBUGF(infof(data, "http2_recv: returns unpaused %zd bytes on stream %u\n",
|
---|
1523 | nread, stream->stream_id));
|
---|
1524 | return nread;
|
---|
1525 | }
|
---|
1526 | else if(httpc->pause_stream_id) {
|
---|
1527 | /* If a stream paused nghttp2_session_mem_recv previously, and has
|
---|
1528 | not processed all data, it still refers to the buffer in
|
---|
1529 | nghttp2_session. If we call nghttp2_session_mem_recv(), we may
|
---|
1530 | overwrite that buffer. To avoid that situation, just return
|
---|
1531 | here with CURLE_AGAIN. This could be busy loop since data in
|
---|
1532 | socket is not read. But it seems that usually streams are
|
---|
1533 | notified with its drain property, and socket is read again
|
---|
1534 | quickly. */
|
---|
1535 | DEBUGF(infof(data, "stream %x is paused, pause id: %x\n",
|
---|
1536 | stream->stream_id, httpc->pause_stream_id));
|
---|
1537 | *err = CURLE_AGAIN;
|
---|
1538 | return -1;
|
---|
1539 | }
|
---|
1540 | else {
|
---|
1541 | char *inbuf;
|
---|
1542 | /* remember where to store incoming data for this stream and how big the
|
---|
1543 | buffer is */
|
---|
1544 | stream->mem = mem;
|
---|
1545 | stream->len = len;
|
---|
1546 | stream->memlen = 0;
|
---|
1547 |
|
---|
1548 | if(httpc->inbuflen == 0) {
|
---|
1549 | nread = ((Curl_recv *)httpc->recv_underlying)(
|
---|
1550 | conn, FIRSTSOCKET, httpc->inbuf, H2_BUFSIZE, &result);
|
---|
1551 |
|
---|
1552 | if(nread == -1) {
|
---|
1553 | if(result != CURLE_AGAIN)
|
---|
1554 | failf(data, "Failed receiving HTTP2 data");
|
---|
1555 | else if(stream->closed)
|
---|
1556 | /* received when the stream was already closed! */
|
---|
1557 | return http2_handle_stream_close(conn, data, stream, err);
|
---|
1558 |
|
---|
1559 | *err = result;
|
---|
1560 | return -1;
|
---|
1561 | }
|
---|
1562 |
|
---|
1563 | if(nread == 0) {
|
---|
1564 | failf(data, "Unexpected EOF");
|
---|
1565 | *err = CURLE_RECV_ERROR;
|
---|
1566 | return -1;
|
---|
1567 | }
|
---|
1568 |
|
---|
1569 | DEBUGF(infof(data, "nread=%zd\n", nread));
|
---|
1570 |
|
---|
1571 | httpc->inbuflen = nread;
|
---|
1572 | inbuf = httpc->inbuf;
|
---|
1573 | }
|
---|
1574 | else {
|
---|
1575 | nread = httpc->inbuflen - httpc->nread_inbuf;
|
---|
1576 | inbuf = httpc->inbuf + httpc->nread_inbuf;
|
---|
1577 |
|
---|
1578 | DEBUGF(infof(data, "Use data left in connection buffer, nread=%zd\n",
|
---|
1579 | nread));
|
---|
1580 | }
|
---|
1581 | rv = nghttp2_session_mem_recv(httpc->h2, (const uint8_t *)inbuf, nread);
|
---|
1582 |
|
---|
1583 | if(nghttp2_is_fatal((int)rv)) {
|
---|
1584 | failf(data, "nghttp2_session_mem_recv() returned %d:%s\n",
|
---|
1585 | rv, nghttp2_strerror((int)rv));
|
---|
1586 | *err = CURLE_RECV_ERROR;
|
---|
1587 | return -1;
|
---|
1588 | }
|
---|
1589 | DEBUGF(infof(data, "nghttp2_session_mem_recv() returns %zd\n", rv));
|
---|
1590 | if(nread == rv) {
|
---|
1591 | DEBUGF(infof(data, "All data in connection buffer processed\n"));
|
---|
1592 | httpc->inbuflen = 0;
|
---|
1593 | httpc->nread_inbuf = 0;
|
---|
1594 | }
|
---|
1595 | else {
|
---|
1596 | httpc->nread_inbuf += rv;
|
---|
1597 | DEBUGF(infof(data, "%zu bytes left in connection buffer\n",
|
---|
1598 | httpc->inbuflen - httpc->nread_inbuf));
|
---|
1599 | }
|
---|
1600 | /* Always send pending frames in nghttp2 session, because
|
---|
1601 | nghttp2_session_mem_recv() may queue new frame */
|
---|
1602 | rv = h2_session_send(data, httpc->h2);
|
---|
1603 | if(rv != 0) {
|
---|
1604 | *err = CURLE_SEND_ERROR;
|
---|
1605 | return -1;
|
---|
1606 | }
|
---|
1607 |
|
---|
1608 | if(should_close_session(httpc)) {
|
---|
1609 | DEBUGF(infof(data, "http2_recv: nothing to do in this session\n"));
|
---|
1610 | *err = CURLE_HTTP2;
|
---|
1611 | return -1;
|
---|
1612 | }
|
---|
1613 | }
|
---|
1614 | if(stream->memlen) {
|
---|
1615 | ssize_t retlen = stream->memlen;
|
---|
1616 | DEBUGF(infof(data, "http2_recv: returns %zd for stream %u\n",
|
---|
1617 | retlen, stream->stream_id));
|
---|
1618 | stream->memlen = 0;
|
---|
1619 |
|
---|
1620 | if(httpc->pause_stream_id == stream->stream_id) {
|
---|
1621 | /* data for this stream is returned now, but this stream caused a pause
|
---|
1622 | already so we need it called again asap */
|
---|
1623 | DEBUGF(infof(data, "Data returned for PAUSED stream %u\n",
|
---|
1624 | stream->stream_id));
|
---|
1625 | }
|
---|
1626 | else if(!stream->closed) {
|
---|
1627 | DEBUGASSERT(httpc->drain_total >= data->state.drain);
|
---|
1628 | httpc->drain_total -= data->state.drain;
|
---|
1629 | data->state.drain = 0; /* this stream is hereby drained */
|
---|
1630 | }
|
---|
1631 |
|
---|
1632 | return retlen;
|
---|
1633 | }
|
---|
1634 | /* If stream is closed, return 0 to signal the http routine to close
|
---|
1635 | the connection */
|
---|
1636 | if(stream->closed) {
|
---|
1637 | return http2_handle_stream_close(conn, data, stream, err);
|
---|
1638 | }
|
---|
1639 | *err = CURLE_AGAIN;
|
---|
1640 | DEBUGF(infof(data, "http2_recv returns AGAIN for stream %u\n",
|
---|
1641 | stream->stream_id));
|
---|
1642 | return -1;
|
---|
1643 | }
|
---|
1644 |
|
---|
1645 | /* Index where :authority header field will appear in request header
|
---|
1646 | field list. */
|
---|
1647 | #define AUTHORITY_DST_IDX 3
|
---|
1648 |
|
---|
1649 | #define HEADER_OVERFLOW(x) \
|
---|
1650 | (x.namelen > (uint16_t)-1 || x.valuelen > (uint16_t)-1 - x.namelen)
|
---|
1651 |
|
---|
1652 | /*
|
---|
1653 | * Check header memory for the token "trailers".
|
---|
1654 | * Parse the tokens as separated by comma and surrounded by whitespace.
|
---|
1655 | * Returns TRUE if found or FALSE if not.
|
---|
1656 | */
|
---|
1657 | static bool contains_trailers(const char *p, size_t len)
|
---|
1658 | {
|
---|
1659 | const char *end = p + len;
|
---|
1660 | for(;;) {
|
---|
1661 | for(; p != end && (*p == ' ' || *p == '\t'); ++p)
|
---|
1662 | ;
|
---|
1663 | if(p == end || (size_t)(end - p) < sizeof("trailers") - 1)
|
---|
1664 | return FALSE;
|
---|
1665 | if(strncasecompare("trailers", p, sizeof("trailers") - 1)) {
|
---|
1666 | p += sizeof("trailers") - 1;
|
---|
1667 | for(; p != end && (*p == ' ' || *p == '\t'); ++p)
|
---|
1668 | ;
|
---|
1669 | if(p == end || *p == ',')
|
---|
1670 | return TRUE;
|
---|
1671 | }
|
---|
1672 | /* skip to next token */
|
---|
1673 | for(; p != end && *p != ','; ++p)
|
---|
1674 | ;
|
---|
1675 | if(p == end)
|
---|
1676 | return FALSE;
|
---|
1677 | ++p;
|
---|
1678 | }
|
---|
1679 | }
|
---|
1680 |
|
---|
1681 | typedef enum {
|
---|
1682 | /* Send header to server */
|
---|
1683 | HEADERINST_FORWARD,
|
---|
1684 | /* Don't send header to server */
|
---|
1685 | HEADERINST_IGNORE,
|
---|
1686 | /* Discard header, and replace it with "te: trailers" */
|
---|
1687 | HEADERINST_TE_TRAILERS
|
---|
1688 | } header_instruction;
|
---|
1689 |
|
---|
1690 | /* Decides how to treat given header field. */
|
---|
1691 | static header_instruction inspect_header(const char *name, size_t namelen,
|
---|
1692 | const char *value, size_t valuelen) {
|
---|
1693 | switch(namelen) {
|
---|
1694 | case 2:
|
---|
1695 | if(!strncasecompare("te", name, namelen))
|
---|
1696 | return HEADERINST_FORWARD;
|
---|
1697 |
|
---|
1698 | return contains_trailers(value, valuelen) ?
|
---|
1699 | HEADERINST_TE_TRAILERS : HEADERINST_IGNORE;
|
---|
1700 | case 7:
|
---|
1701 | return strncasecompare("upgrade", name, namelen) ?
|
---|
1702 | HEADERINST_IGNORE : HEADERINST_FORWARD;
|
---|
1703 | case 10:
|
---|
1704 | return (strncasecompare("connection", name, namelen) ||
|
---|
1705 | strncasecompare("keep-alive", name, namelen)) ?
|
---|
1706 | HEADERINST_IGNORE : HEADERINST_FORWARD;
|
---|
1707 | case 16:
|
---|
1708 | return strncasecompare("proxy-connection", name, namelen) ?
|
---|
1709 | HEADERINST_IGNORE : HEADERINST_FORWARD;
|
---|
1710 | case 17:
|
---|
1711 | return strncasecompare("transfer-encoding", name, namelen) ?
|
---|
1712 | HEADERINST_IGNORE : HEADERINST_FORWARD;
|
---|
1713 | default:
|
---|
1714 | return HEADERINST_FORWARD;
|
---|
1715 | }
|
---|
1716 | }
|
---|
1717 |
|
---|
1718 | static ssize_t http2_send(struct connectdata *conn, int sockindex,
|
---|
1719 | const void *mem, size_t len, CURLcode *err)
|
---|
1720 | {
|
---|
1721 | /*
|
---|
1722 | * BIG TODO: Currently, we send request in this function, but this
|
---|
1723 | * function is also used to send request body. It would be nice to
|
---|
1724 | * add dedicated function for request.
|
---|
1725 | */
|
---|
1726 | int rv;
|
---|
1727 | struct http_conn *httpc = &conn->proto.httpc;
|
---|
1728 | struct HTTP *stream = conn->data->req.protop;
|
---|
1729 | nghttp2_nv *nva = NULL;
|
---|
1730 | size_t nheader;
|
---|
1731 | size_t i;
|
---|
1732 | size_t authority_idx;
|
---|
1733 | char *hdbuf = (char *)mem;
|
---|
1734 | char *end, *line_end;
|
---|
1735 | nghttp2_data_provider data_prd;
|
---|
1736 | int32_t stream_id;
|
---|
1737 | nghttp2_session *h2 = httpc->h2;
|
---|
1738 | nghttp2_priority_spec pri_spec;
|
---|
1739 |
|
---|
1740 | (void)sockindex;
|
---|
1741 |
|
---|
1742 | DEBUGF(infof(conn->data, "http2_send len=%zu\n", len));
|
---|
1743 |
|
---|
1744 | if(stream->stream_id != -1) {
|
---|
1745 | if(stream->close_handled) {
|
---|
1746 | infof(conn->data, "stream %d closed\n", stream->stream_id);
|
---|
1747 | *err = CURLE_HTTP2_STREAM;
|
---|
1748 | return -1;
|
---|
1749 | }
|
---|
1750 | else if(stream->closed) {
|
---|
1751 | return http2_handle_stream_close(conn, conn->data, stream, err);
|
---|
1752 | }
|
---|
1753 | /* If stream_id != -1, we have dispatched request HEADERS, and now
|
---|
1754 | are going to send or sending request body in DATA frame */
|
---|
1755 | stream->upload_mem = mem;
|
---|
1756 | stream->upload_len = len;
|
---|
1757 | nghttp2_session_resume_data(h2, stream->stream_id);
|
---|
1758 | rv = h2_session_send(conn->data, h2);
|
---|
1759 | if(nghttp2_is_fatal(rv)) {
|
---|
1760 | *err = CURLE_SEND_ERROR;
|
---|
1761 | return -1;
|
---|
1762 | }
|
---|
1763 | len -= stream->upload_len;
|
---|
1764 |
|
---|
1765 | /* Nullify here because we call nghttp2_session_send() and they
|
---|
1766 | might refer to the old buffer. */
|
---|
1767 | stream->upload_mem = NULL;
|
---|
1768 | stream->upload_len = 0;
|
---|
1769 |
|
---|
1770 | if(should_close_session(httpc)) {
|
---|
1771 | DEBUGF(infof(conn->data, "http2_send: nothing to do in this session\n"));
|
---|
1772 | *err = CURLE_HTTP2;
|
---|
1773 | return -1;
|
---|
1774 | }
|
---|
1775 |
|
---|
1776 | if(stream->upload_left) {
|
---|
1777 | /* we are sure that we have more data to send here. Calling the
|
---|
1778 | following API will make nghttp2_session_want_write() return
|
---|
1779 | nonzero if remote window allows it, which then libcurl checks
|
---|
1780 | socket is writable or not. See http2_perform_getsock(). */
|
---|
1781 | nghttp2_session_resume_data(h2, stream->stream_id);
|
---|
1782 | }
|
---|
1783 |
|
---|
1784 | DEBUGF(infof(conn->data, "http2_send returns %zu for stream %u\n", len,
|
---|
1785 | stream->stream_id));
|
---|
1786 | return len;
|
---|
1787 | }
|
---|
1788 |
|
---|
1789 | /* Calculate number of headers contained in [mem, mem + len) */
|
---|
1790 | /* Here, we assume the curl http code generate *correct* HTTP header
|
---|
1791 | field block */
|
---|
1792 | nheader = 0;
|
---|
1793 | for(i = 1; i < len; ++i) {
|
---|
1794 | if(hdbuf[i] == '\n' && hdbuf[i - 1] == '\r') {
|
---|
1795 | ++nheader;
|
---|
1796 | ++i;
|
---|
1797 | }
|
---|
1798 | }
|
---|
1799 | if(nheader < 2)
|
---|
1800 | goto fail;
|
---|
1801 |
|
---|
1802 | /* We counted additional 2 \r\n in the first and last line. We need 3
|
---|
1803 | new headers: :method, :path and :scheme. Therefore we need one
|
---|
1804 | more space. */
|
---|
1805 | nheader += 1;
|
---|
1806 | nva = malloc(sizeof(nghttp2_nv) * nheader);
|
---|
1807 | if(nva == NULL) {
|
---|
1808 | *err = CURLE_OUT_OF_MEMORY;
|
---|
1809 | return -1;
|
---|
1810 | }
|
---|
1811 |
|
---|
1812 | /* Extract :method, :path from request line */
|
---|
1813 | line_end = strstr(hdbuf, "\r\n");
|
---|
1814 |
|
---|
1815 | /* Method does not contain spaces */
|
---|
1816 | end = memchr(hdbuf, ' ', line_end - hdbuf);
|
---|
1817 | if(!end || end == hdbuf)
|
---|
1818 | goto fail;
|
---|
1819 | nva[0].name = (unsigned char *)":method";
|
---|
1820 | nva[0].namelen = strlen((char *)nva[0].name);
|
---|
1821 | nva[0].value = (unsigned char *)hdbuf;
|
---|
1822 | nva[0].valuelen = (size_t)(end - hdbuf);
|
---|
1823 | nva[0].flags = NGHTTP2_NV_FLAG_NONE;
|
---|
1824 | if(HEADER_OVERFLOW(nva[0])) {
|
---|
1825 | failf(conn->data, "Failed sending HTTP request: Header overflow");
|
---|
1826 | goto fail;
|
---|
1827 | }
|
---|
1828 |
|
---|
1829 | hdbuf = end + 1;
|
---|
1830 |
|
---|
1831 | /* Path may contain spaces so scan backwards */
|
---|
1832 | end = NULL;
|
---|
1833 | for(i = (size_t)(line_end - hdbuf); i; --i) {
|
---|
1834 | if(hdbuf[i - 1] == ' ') {
|
---|
1835 | end = &hdbuf[i - 1];
|
---|
1836 | break;
|
---|
1837 | }
|
---|
1838 | }
|
---|
1839 | if(!end || end == hdbuf)
|
---|
1840 | goto fail;
|
---|
1841 | nva[1].name = (unsigned char *)":path";
|
---|
1842 | nva[1].namelen = strlen((char *)nva[1].name);
|
---|
1843 | nva[1].value = (unsigned char *)hdbuf;
|
---|
1844 | nva[1].valuelen = (size_t)(end - hdbuf);
|
---|
1845 | nva[1].flags = NGHTTP2_NV_FLAG_NONE;
|
---|
1846 | if(HEADER_OVERFLOW(nva[1])) {
|
---|
1847 | failf(conn->data, "Failed sending HTTP request: Header overflow");
|
---|
1848 | goto fail;
|
---|
1849 | }
|
---|
1850 |
|
---|
1851 | nva[2].name = (unsigned char *)":scheme";
|
---|
1852 | nva[2].namelen = strlen((char *)nva[2].name);
|
---|
1853 | if(conn->handler->flags & PROTOPT_SSL)
|
---|
1854 | nva[2].value = (unsigned char *)"https";
|
---|
1855 | else
|
---|
1856 | nva[2].value = (unsigned char *)"http";
|
---|
1857 | nva[2].valuelen = strlen((char *)nva[2].value);
|
---|
1858 | nva[2].flags = NGHTTP2_NV_FLAG_NONE;
|
---|
1859 | if(HEADER_OVERFLOW(nva[2])) {
|
---|
1860 | failf(conn->data, "Failed sending HTTP request: Header overflow");
|
---|
1861 | goto fail;
|
---|
1862 | }
|
---|
1863 |
|
---|
1864 | authority_idx = 0;
|
---|
1865 | i = 3;
|
---|
1866 | while(i < nheader) {
|
---|
1867 | size_t hlen;
|
---|
1868 |
|
---|
1869 | hdbuf = line_end + 2;
|
---|
1870 |
|
---|
1871 | line_end = strstr(hdbuf, "\r\n");
|
---|
1872 | if(line_end == hdbuf)
|
---|
1873 | goto fail;
|
---|
1874 |
|
---|
1875 | /* header continuation lines are not supported */
|
---|
1876 | if(*hdbuf == ' ' || *hdbuf == '\t')
|
---|
1877 | goto fail;
|
---|
1878 |
|
---|
1879 | for(end = hdbuf; end < line_end && *end != ':'; ++end)
|
---|
1880 | ;
|
---|
1881 | if(end == hdbuf || end == line_end)
|
---|
1882 | goto fail;
|
---|
1883 | hlen = end - hdbuf;
|
---|
1884 |
|
---|
1885 | if(hlen == 4 && strncasecompare("host", hdbuf, 4)) {
|
---|
1886 | authority_idx = i;
|
---|
1887 | nva[i].name = (unsigned char *)":authority";
|
---|
1888 | nva[i].namelen = strlen((char *)nva[i].name);
|
---|
1889 | }
|
---|
1890 | else {
|
---|
1891 | nva[i].name = (unsigned char *)hdbuf;
|
---|
1892 | nva[i].namelen = (size_t)(end - hdbuf);
|
---|
1893 | }
|
---|
1894 | hdbuf = end + 1;
|
---|
1895 | while(*hdbuf == ' ' || *hdbuf == '\t')
|
---|
1896 | ++hdbuf;
|
---|
1897 | end = line_end;
|
---|
1898 |
|
---|
1899 | switch(inspect_header((const char *)nva[i].name, nva[i].namelen, hdbuf,
|
---|
1900 | end - hdbuf)) {
|
---|
1901 | case HEADERINST_IGNORE:
|
---|
1902 | /* skip header fields prohibited by HTTP/2 specification. */
|
---|
1903 | --nheader;
|
---|
1904 | continue;
|
---|
1905 | case HEADERINST_TE_TRAILERS:
|
---|
1906 | nva[i].value = (uint8_t*)"trailers";
|
---|
1907 | nva[i].valuelen = sizeof("trailers") - 1;
|
---|
1908 | break;
|
---|
1909 | default:
|
---|
1910 | nva[i].value = (unsigned char *)hdbuf;
|
---|
1911 | nva[i].valuelen = (size_t)(end - hdbuf);
|
---|
1912 | }
|
---|
1913 |
|
---|
1914 | nva[i].flags = NGHTTP2_NV_FLAG_NONE;
|
---|
1915 | if(HEADER_OVERFLOW(nva[i])) {
|
---|
1916 | failf(conn->data, "Failed sending HTTP request: Header overflow");
|
---|
1917 | goto fail;
|
---|
1918 | }
|
---|
1919 | ++i;
|
---|
1920 | }
|
---|
1921 |
|
---|
1922 | /* :authority must come before non-pseudo header fields */
|
---|
1923 | if(authority_idx != 0 && authority_idx != AUTHORITY_DST_IDX) {
|
---|
1924 | nghttp2_nv authority = nva[authority_idx];
|
---|
1925 | for(i = authority_idx; i > AUTHORITY_DST_IDX; --i) {
|
---|
1926 | nva[i] = nva[i - 1];
|
---|
1927 | }
|
---|
1928 | nva[i] = authority;
|
---|
1929 | }
|
---|
1930 |
|
---|
1931 | /* Warn stream may be rejected if cumulative length of headers is too large.
|
---|
1932 | It appears nghttp2 will not send a header frame larger than 64KB. */
|
---|
1933 | #define MAX_ACC 60000 /* <64KB to account for some overhead */
|
---|
1934 | {
|
---|
1935 | size_t acc = 0;
|
---|
1936 |
|
---|
1937 | for(i = 0; i < nheader; ++i) {
|
---|
1938 | acc += nva[i].namelen + nva[i].valuelen;
|
---|
1939 |
|
---|
1940 | DEBUGF(infof(conn->data, "h2 header: %.*s:%.*s\n",
|
---|
1941 | nva[i].namelen, nva[i].name,
|
---|
1942 | nva[i].valuelen, nva[i].value));
|
---|
1943 | }
|
---|
1944 |
|
---|
1945 | if(acc > MAX_ACC) {
|
---|
1946 | infof(conn->data, "http2_send: Warning: The cumulative length of all "
|
---|
1947 | "headers exceeds %zu bytes and that could cause the "
|
---|
1948 | "stream to be rejected.\n", MAX_ACC);
|
---|
1949 | }
|
---|
1950 | }
|
---|
1951 |
|
---|
1952 | h2_pri_spec(conn->data, &pri_spec);
|
---|
1953 |
|
---|
1954 | switch(conn->data->set.httpreq) {
|
---|
1955 | case HTTPREQ_POST:
|
---|
1956 | case HTTPREQ_POST_FORM:
|
---|
1957 | case HTTPREQ_POST_MIME:
|
---|
1958 | case HTTPREQ_PUT:
|
---|
1959 | if(conn->data->state.infilesize != -1)
|
---|
1960 | stream->upload_left = conn->data->state.infilesize;
|
---|
1961 | else
|
---|
1962 | /* data sending without specifying the data amount up front */
|
---|
1963 | stream->upload_left = -1; /* unknown, but not zero */
|
---|
1964 |
|
---|
1965 | data_prd.read_callback = data_source_read_callback;
|
---|
1966 | data_prd.source.ptr = NULL;
|
---|
1967 | stream_id = nghttp2_submit_request(h2, &pri_spec, nva, nheader,
|
---|
1968 | &data_prd, conn->data);
|
---|
1969 | break;
|
---|
1970 | default:
|
---|
1971 | stream_id = nghttp2_submit_request(h2, &pri_spec, nva, nheader,
|
---|
1972 | NULL, conn->data);
|
---|
1973 | }
|
---|
1974 |
|
---|
1975 | Curl_safefree(nva);
|
---|
1976 |
|
---|
1977 | if(stream_id < 0) {
|
---|
1978 | DEBUGF(infof(conn->data, "http2_send() send error\n"));
|
---|
1979 | *err = CURLE_SEND_ERROR;
|
---|
1980 | return -1;
|
---|
1981 | }
|
---|
1982 |
|
---|
1983 | infof(conn->data, "Using Stream ID: %x (easy handle %p)\n",
|
---|
1984 | stream_id, conn->data);
|
---|
1985 | stream->stream_id = stream_id;
|
---|
1986 |
|
---|
1987 | /* this does not call h2_session_send() since there can not have been any
|
---|
1988 | * priority upodate since the nghttp2_submit_request() call above */
|
---|
1989 | rv = nghttp2_session_send(h2);
|
---|
1990 |
|
---|
1991 | if(rv != 0) {
|
---|
1992 | *err = CURLE_SEND_ERROR;
|
---|
1993 | return -1;
|
---|
1994 | }
|
---|
1995 |
|
---|
1996 | if(should_close_session(httpc)) {
|
---|
1997 | DEBUGF(infof(conn->data, "http2_send: nothing to do in this session\n"));
|
---|
1998 | *err = CURLE_HTTP2;
|
---|
1999 | return -1;
|
---|
2000 | }
|
---|
2001 |
|
---|
2002 | if(stream->stream_id != -1) {
|
---|
2003 | /* If whole HEADERS frame was sent off to the underlying socket,
|
---|
2004 | the nghttp2 library calls data_source_read_callback. But only
|
---|
2005 | it found that no data available, so it deferred the DATA
|
---|
2006 | transmission. Which means that nghttp2_session_want_write()
|
---|
2007 | returns 0 on http2_perform_getsock(), which results that no
|
---|
2008 | writable socket check is performed. To workaround this, we
|
---|
2009 | issue nghttp2_session_resume_data() here to bring back DATA
|
---|
2010 | transmission from deferred state. */
|
---|
2011 | nghttp2_session_resume_data(h2, stream->stream_id);
|
---|
2012 | }
|
---|
2013 |
|
---|
2014 | return len;
|
---|
2015 |
|
---|
2016 | fail:
|
---|
2017 | free(nva);
|
---|
2018 | *err = CURLE_SEND_ERROR;
|
---|
2019 | return -1;
|
---|
2020 | }
|
---|
2021 |
|
---|
2022 | CURLcode Curl_http2_setup(struct connectdata *conn)
|
---|
2023 | {
|
---|
2024 | CURLcode result;
|
---|
2025 | struct http_conn *httpc = &conn->proto.httpc;
|
---|
2026 | struct HTTP *stream = conn->data->req.protop;
|
---|
2027 |
|
---|
2028 | stream->stream_id = -1;
|
---|
2029 |
|
---|
2030 | if(!stream->header_recvbuf)
|
---|
2031 | stream->header_recvbuf = Curl_add_buffer_init();
|
---|
2032 |
|
---|
2033 | if((conn->handler == &Curl_handler_http2_ssl) ||
|
---|
2034 | (conn->handler == &Curl_handler_http2))
|
---|
2035 | return CURLE_OK; /* already done */
|
---|
2036 |
|
---|
2037 | if(conn->handler->flags & PROTOPT_SSL)
|
---|
2038 | conn->handler = &Curl_handler_http2_ssl;
|
---|
2039 | else
|
---|
2040 | conn->handler = &Curl_handler_http2;
|
---|
2041 |
|
---|
2042 | result = Curl_http2_init(conn);
|
---|
2043 | if(result)
|
---|
2044 | return result;
|
---|
2045 |
|
---|
2046 | infof(conn->data, "Using HTTP2, server supports multi-use\n");
|
---|
2047 | stream->upload_left = 0;
|
---|
2048 | stream->upload_mem = NULL;
|
---|
2049 | stream->upload_len = 0;
|
---|
2050 |
|
---|
2051 | httpc->inbuflen = 0;
|
---|
2052 | httpc->nread_inbuf = 0;
|
---|
2053 |
|
---|
2054 | httpc->pause_stream_id = 0;
|
---|
2055 | httpc->drain_total = 0;
|
---|
2056 |
|
---|
2057 | conn->bits.multiplex = TRUE; /* at least potentially multiplexed */
|
---|
2058 | conn->httpversion = 20;
|
---|
2059 | conn->bundle->multiuse = BUNDLE_MULTIPLEX;
|
---|
2060 |
|
---|
2061 | infof(conn->data, "Connection state changed (HTTP/2 confirmed)\n");
|
---|
2062 | Curl_multi_connchanged(conn->data->multi);
|
---|
2063 |
|
---|
2064 | return CURLE_OK;
|
---|
2065 | }
|
---|
2066 |
|
---|
2067 | CURLcode Curl_http2_switched(struct connectdata *conn,
|
---|
2068 | const char *mem, size_t nread)
|
---|
2069 | {
|
---|
2070 | CURLcode result;
|
---|
2071 | struct http_conn *httpc = &conn->proto.httpc;
|
---|
2072 | int rv;
|
---|
2073 | ssize_t nproc;
|
---|
2074 | struct Curl_easy *data = conn->data;
|
---|
2075 | struct HTTP *stream = conn->data->req.protop;
|
---|
2076 |
|
---|
2077 | result = Curl_http2_setup(conn);
|
---|
2078 | if(result)
|
---|
2079 | return result;
|
---|
2080 |
|
---|
2081 | httpc->recv_underlying = (recving)conn->recv[FIRSTSOCKET];
|
---|
2082 | httpc->send_underlying = (sending)conn->send[FIRSTSOCKET];
|
---|
2083 | conn->recv[FIRSTSOCKET] = http2_recv;
|
---|
2084 | conn->send[FIRSTSOCKET] = http2_send;
|
---|
2085 |
|
---|
2086 | if(conn->data->req.upgr101 == UPGR101_RECEIVED) {
|
---|
2087 | /* stream 1 is opened implicitly on upgrade */
|
---|
2088 | stream->stream_id = 1;
|
---|
2089 | /* queue SETTINGS frame (again) */
|
---|
2090 | rv = nghttp2_session_upgrade(httpc->h2, httpc->binsettings,
|
---|
2091 | httpc->binlen, NULL);
|
---|
2092 | if(rv != 0) {
|
---|
2093 | failf(data, "nghttp2_session_upgrade() failed: %s(%d)",
|
---|
2094 | nghttp2_strerror(rv), rv);
|
---|
2095 | return CURLE_HTTP2;
|
---|
2096 | }
|
---|
2097 |
|
---|
2098 | nghttp2_session_set_stream_user_data(httpc->h2,
|
---|
2099 | stream->stream_id,
|
---|
2100 | conn->data);
|
---|
2101 | }
|
---|
2102 | else {
|
---|
2103 | populate_settings(conn, httpc);
|
---|
2104 |
|
---|
2105 | /* stream ID is unknown at this point */
|
---|
2106 | stream->stream_id = -1;
|
---|
2107 | rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE,
|
---|
2108 | httpc->local_settings,
|
---|
2109 | httpc->local_settings_num);
|
---|
2110 | if(rv != 0) {
|
---|
2111 | failf(data, "nghttp2_submit_settings() failed: %s(%d)",
|
---|
2112 | nghttp2_strerror(rv), rv);
|
---|
2113 | return CURLE_HTTP2;
|
---|
2114 | }
|
---|
2115 | }
|
---|
2116 |
|
---|
2117 | #ifdef NGHTTP2_HAS_SET_LOCAL_WINDOW_SIZE
|
---|
2118 | rv = nghttp2_session_set_local_window_size(httpc->h2, NGHTTP2_FLAG_NONE, 0,
|
---|
2119 | HTTP2_HUGE_WINDOW_SIZE);
|
---|
2120 | if(rv != 0) {
|
---|
2121 | failf(data, "nghttp2_session_set_local_window_size() failed: %s(%d)",
|
---|
2122 | nghttp2_strerror(rv), rv);
|
---|
2123 | return CURLE_HTTP2;
|
---|
2124 | }
|
---|
2125 | #endif
|
---|
2126 |
|
---|
2127 | /* we are going to copy mem to httpc->inbuf. This is required since
|
---|
2128 | mem is part of buffer pointed by stream->mem, and callbacks
|
---|
2129 | called by nghttp2_session_mem_recv() will write stream specific
|
---|
2130 | data into stream->mem, overwriting data already there. */
|
---|
2131 | if(H2_BUFSIZE < nread) {
|
---|
2132 | failf(data, "connection buffer size is too small to store data following "
|
---|
2133 | "HTTP Upgrade response header: buflen=%zu, datalen=%zu",
|
---|
2134 | H2_BUFSIZE, nread);
|
---|
2135 | return CURLE_HTTP2;
|
---|
2136 | }
|
---|
2137 |
|
---|
2138 | infof(conn->data, "Copying HTTP/2 data in stream buffer to connection buffer"
|
---|
2139 | " after upgrade: len=%zu\n",
|
---|
2140 | nread);
|
---|
2141 |
|
---|
2142 | if(nread)
|
---|
2143 | memcpy(httpc->inbuf, mem, nread);
|
---|
2144 | httpc->inbuflen = nread;
|
---|
2145 |
|
---|
2146 | nproc = nghttp2_session_mem_recv(httpc->h2, (const uint8_t *)httpc->inbuf,
|
---|
2147 | httpc->inbuflen);
|
---|
2148 |
|
---|
2149 | if(nghttp2_is_fatal((int)nproc)) {
|
---|
2150 | failf(data, "nghttp2_session_mem_recv() failed: %s(%d)",
|
---|
2151 | nghttp2_strerror((int)nproc), (int)nproc);
|
---|
2152 | return CURLE_HTTP2;
|
---|
2153 | }
|
---|
2154 |
|
---|
2155 | DEBUGF(infof(data, "nghttp2_session_mem_recv() returns %zd\n", nproc));
|
---|
2156 |
|
---|
2157 | if((ssize_t)nread == nproc) {
|
---|
2158 | httpc->inbuflen = 0;
|
---|
2159 | httpc->nread_inbuf = 0;
|
---|
2160 | }
|
---|
2161 | else {
|
---|
2162 | httpc->nread_inbuf += nproc;
|
---|
2163 | }
|
---|
2164 |
|
---|
2165 | /* Try to send some frames since we may read SETTINGS already. */
|
---|
2166 | rv = h2_session_send(data, httpc->h2);
|
---|
2167 |
|
---|
2168 | if(rv != 0) {
|
---|
2169 | failf(data, "nghttp2_session_send() failed: %s(%d)",
|
---|
2170 | nghttp2_strerror(rv), rv);
|
---|
2171 | return CURLE_HTTP2;
|
---|
2172 | }
|
---|
2173 |
|
---|
2174 | if(should_close_session(httpc)) {
|
---|
2175 | DEBUGF(infof(data,
|
---|
2176 | "nghttp2_session_send(): nothing to do in this session\n"));
|
---|
2177 | return CURLE_HTTP2;
|
---|
2178 | }
|
---|
2179 |
|
---|
2180 | return CURLE_OK;
|
---|
2181 | }
|
---|
2182 |
|
---|
2183 | CURLcode Curl_http2_add_child(struct Curl_easy *parent,
|
---|
2184 | struct Curl_easy *child,
|
---|
2185 | bool exclusive)
|
---|
2186 | {
|
---|
2187 | if(parent) {
|
---|
2188 | struct Curl_http2_dep **tail;
|
---|
2189 | struct Curl_http2_dep *dep = calloc(1, sizeof(struct Curl_http2_dep));
|
---|
2190 | if(!dep)
|
---|
2191 | return CURLE_OUT_OF_MEMORY;
|
---|
2192 | dep->data = child;
|
---|
2193 |
|
---|
2194 | if(parent->set.stream_dependents && exclusive) {
|
---|
2195 | struct Curl_http2_dep *node = parent->set.stream_dependents;
|
---|
2196 | while(node) {
|
---|
2197 | node->data->set.stream_depends_on = child;
|
---|
2198 | node = node->next;
|
---|
2199 | }
|
---|
2200 |
|
---|
2201 | tail = &child->set.stream_dependents;
|
---|
2202 | while(*tail)
|
---|
2203 | tail = &(*tail)->next;
|
---|
2204 |
|
---|
2205 | DEBUGASSERT(!*tail);
|
---|
2206 | *tail = parent->set.stream_dependents;
|
---|
2207 | parent->set.stream_dependents = 0;
|
---|
2208 | }
|
---|
2209 |
|
---|
2210 | tail = &parent->set.stream_dependents;
|
---|
2211 | while(*tail) {
|
---|
2212 | (*tail)->data->set.stream_depends_e = FALSE;
|
---|
2213 | tail = &(*tail)->next;
|
---|
2214 | }
|
---|
2215 |
|
---|
2216 | DEBUGASSERT(!*tail);
|
---|
2217 | *tail = dep;
|
---|
2218 | }
|
---|
2219 |
|
---|
2220 | child->set.stream_depends_on = parent;
|
---|
2221 | child->set.stream_depends_e = exclusive;
|
---|
2222 | return CURLE_OK;
|
---|
2223 | }
|
---|
2224 |
|
---|
2225 | void Curl_http2_remove_child(struct Curl_easy *parent, struct Curl_easy *child)
|
---|
2226 | {
|
---|
2227 | struct Curl_http2_dep *last = 0;
|
---|
2228 | struct Curl_http2_dep *data = parent->set.stream_dependents;
|
---|
2229 | DEBUGASSERT(child->set.stream_depends_on == parent);
|
---|
2230 |
|
---|
2231 | while(data && data->data != child) {
|
---|
2232 | last = data;
|
---|
2233 | data = data->next;
|
---|
2234 | }
|
---|
2235 |
|
---|
2236 | DEBUGASSERT(data);
|
---|
2237 |
|
---|
2238 | if(data) {
|
---|
2239 | if(last) {
|
---|
2240 | last->next = data->next;
|
---|
2241 | }
|
---|
2242 | else {
|
---|
2243 | parent->set.stream_dependents = data->next;
|
---|
2244 | }
|
---|
2245 | free(data);
|
---|
2246 | }
|
---|
2247 |
|
---|
2248 | child->set.stream_depends_on = 0;
|
---|
2249 | child->set.stream_depends_e = FALSE;
|
---|
2250 | }
|
---|
2251 |
|
---|
2252 | void Curl_http2_cleanup_dependencies(struct Curl_easy *data)
|
---|
2253 | {
|
---|
2254 | while(data->set.stream_dependents) {
|
---|
2255 | struct Curl_easy *tmp = data->set.stream_dependents->data;
|
---|
2256 | Curl_http2_remove_child(data, tmp);
|
---|
2257 | if(data->set.stream_depends_on)
|
---|
2258 | Curl_http2_add_child(data->set.stream_depends_on, tmp, FALSE);
|
---|
2259 | }
|
---|
2260 |
|
---|
2261 | if(data->set.stream_depends_on)
|
---|
2262 | Curl_http2_remove_child(data->set.stream_depends_on, data);
|
---|
2263 | }
|
---|
2264 |
|
---|
2265 | #else /* !USE_NGHTTP2 */
|
---|
2266 |
|
---|
2267 | /* Satisfy external references even if http2 is not compiled in. */
|
---|
2268 |
|
---|
2269 | #define CURL_DISABLE_TYPECHECK
|
---|
2270 | #include <curl/curl.h>
|
---|
2271 |
|
---|
2272 | char *curl_pushheader_bynum(struct curl_pushheaders *h, size_t num)
|
---|
2273 | {
|
---|
2274 | (void) h;
|
---|
2275 | (void) num;
|
---|
2276 | return NULL;
|
---|
2277 | }
|
---|
2278 |
|
---|
2279 | char *curl_pushheader_byname(struct curl_pushheaders *h, const char *header)
|
---|
2280 | {
|
---|
2281 | (void) h;
|
---|
2282 | (void) header;
|
---|
2283 | return NULL;
|
---|
2284 | }
|
---|
2285 |
|
---|
2286 | #endif /* USE_NGHTTP2 */
|
---|