Mercurial > hg > nginx
annotate src/stream/ngx_stream_handler.c @ 8795:278ab0ed24f2 quic
HTTP/3: generate more H3_FRAME_UNEXPECTED.
As per quic-http-34, these are the cases when this error should be generated:
If an endpoint receives a second SETTINGS frame
on the control stream, the endpoint MUST respond with a connection
error of type H3_FRAME_UNEXPECTED
SETTINGS frames MUST NOT be sent on any stream other than the control
stream. If an endpoint receives a SETTINGS frame on a different
stream, the endpoint MUST respond with a connection error of type
H3_FRAME_UNEXPECTED.
A client MUST NOT send a PUSH_PROMISE frame. A server MUST treat the
receipt of a PUSH_PROMISE frame as a connection error of type
H3_FRAME_UNEXPECTED; see Section 8.
The MAX_PUSH_ID frame is always sent on the control stream. Receipt
of a MAX_PUSH_ID frame on any other stream MUST be treated as a
connection error of type H3_FRAME_UNEXPECTED.
Receipt of an invalid sequence of frames MUST be treated as a
connection error of type H3_FRAME_UNEXPECTED; see Section 8. In
particular, a DATA frame before any HEADERS frame, or a HEADERS or
DATA frame after the trailing HEADERS frame, is considered invalid.
A CANCEL_PUSH frame is sent on the control stream. Receiving a
CANCEL_PUSH frame on a stream other than the control stream MUST be
treated as a connection error of type H3_FRAME_UNEXPECTED.
The GOAWAY frame is always sent on the control stream.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Fri, 11 Jun 2021 12:11:08 +0300 |
parents | 279ad36f2f4b |
children | e96c20b6f655 |
rev | line source |
---|---|
6115 | 1 |
2 /* | |
3 * Copyright (C) Roman Arutyunyan | |
4 * Copyright (C) Nginx, Inc. | |
5 */ | |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_event.h> | |
11 #include <ngx_stream.h> | |
12 | |
13 | |
6693 | 14 static void ngx_stream_log_session(ngx_stream_session_t *s); |
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15 static void ngx_stream_close_connection(ngx_connection_t *c); |
6115 | 16 static u_char *ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len); |
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17 static void ngx_stream_proxy_protocol_handler(ngx_event_t *rev); |
6115 | 18 |
19 | |
20 void | |
21 ngx_stream_init_connection(ngx_connection_t *c) | |
22 { | |
6175 | 23 u_char text[NGX_SOCKADDR_STRLEN]; |
24 size_t len; | |
25 ngx_uint_t i; | |
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26 ngx_time_t *tp; |
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27 ngx_event_t *rev; |
6175 | 28 struct sockaddr *sa; |
29 ngx_stream_port_t *port; | |
30 struct sockaddr_in *sin; | |
31 ngx_stream_in_addr_t *addr; | |
32 ngx_stream_session_t *s; | |
33 ngx_stream_addr_conf_t *addr_conf; | |
6115 | 34 #if (NGX_HAVE_INET6) |
6175 | 35 struct sockaddr_in6 *sin6; |
36 ngx_stream_in6_addr_t *addr6; | |
6115 | 37 #endif |
6175 | 38 ngx_stream_core_srv_conf_t *cscf; |
39 ngx_stream_core_main_conf_t *cmcf; | |
6115 | 40 |
41 /* find the server configuration for the address:port */ | |
42 | |
43 port = c->listening->servers; | |
44 | |
45 if (port->naddrs > 1) { | |
46 | |
47 /* | |
48 * There are several addresses on this port and one of them | |
49 * is the "*:port" wildcard so getsockname() is needed to determine | |
50 * the server address. | |
51 * | |
6436 | 52 * AcceptEx() and recvmsg() already gave this address. |
6115 | 53 */ |
54 | |
55 if (ngx_connection_local_sockaddr(c, NULL, 0) != NGX_OK) { | |
56 ngx_stream_close_connection(c); | |
57 return; | |
58 } | |
59 | |
60 sa = c->local_sockaddr; | |
61 | |
62 switch (sa->sa_family) { | |
63 | |
64 #if (NGX_HAVE_INET6) | |
65 case AF_INET6: | |
66 sin6 = (struct sockaddr_in6 *) sa; | |
67 | |
68 addr6 = port->addrs; | |
69 | |
70 /* the last address is "*" */ | |
71 | |
72 for (i = 0; i < port->naddrs - 1; i++) { | |
73 if (ngx_memcmp(&addr6[i].addr6, &sin6->sin6_addr, 16) == 0) { | |
74 break; | |
75 } | |
76 } | |
77 | |
78 addr_conf = &addr6[i].conf; | |
79 | |
80 break; | |
81 #endif | |
82 | |
83 default: /* AF_INET */ | |
84 sin = (struct sockaddr_in *) sa; | |
85 | |
86 addr = port->addrs; | |
87 | |
88 /* the last address is "*" */ | |
89 | |
90 for (i = 0; i < port->naddrs - 1; i++) { | |
91 if (addr[i].addr == sin->sin_addr.s_addr) { | |
92 break; | |
93 } | |
94 } | |
95 | |
96 addr_conf = &addr[i].conf; | |
97 | |
98 break; | |
99 } | |
100 | |
101 } else { | |
102 switch (c->local_sockaddr->sa_family) { | |
103 | |
104 #if (NGX_HAVE_INET6) | |
105 case AF_INET6: | |
106 addr6 = port->addrs; | |
107 addr_conf = &addr6[0].conf; | |
108 break; | |
109 #endif | |
110 | |
111 default: /* AF_INET */ | |
112 addr = port->addrs; | |
113 addr_conf = &addr[0].conf; | |
114 break; | |
115 } | |
116 } | |
117 | |
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118 #if (NGX_STREAM_QUIC) |
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119 |
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120 if (addr_conf->quic) { |
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121 ngx_quic_conf_t *qcf; |
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122 |
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123 if (c->quic == NULL) { |
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124 c->log->connection = c->number; |
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125 |
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126 qcf = ngx_stream_get_module_srv_conf(addr_conf->ctx, |
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127 ngx_stream_quic_module); |
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128 ngx_quic_run(c, qcf); |
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129 return; |
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130 } |
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131 } |
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132 |
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133 #endif |
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134 |
6115 | 135 s = ngx_pcalloc(c->pool, sizeof(ngx_stream_session_t)); |
136 if (s == NULL) { | |
137 ngx_stream_close_connection(c); | |
138 return; | |
139 } | |
140 | |
141 s->signature = NGX_STREAM_MODULE; | |
142 s->main_conf = addr_conf->ctx->main_conf; | |
143 s->srv_conf = addr_conf->ctx->srv_conf; | |
144 | |
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145 #if (NGX_STREAM_SSL) |
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146 s->ssl = addr_conf->ssl; |
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147 #endif |
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148 |
6692 | 149 if (c->buffer) { |
150 s->received += c->buffer->last - c->buffer->pos; | |
151 } | |
152 | |
6115 | 153 s->connection = c; |
154 c->data = s; | |
155 | |
156 cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module); | |
157 | |
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158 ngx_set_connection_log(c, cscf->error_log); |
6115 | 159 |
160 len = ngx_sock_ntop(c->sockaddr, c->socklen, text, NGX_SOCKADDR_STRLEN, 1); | |
161 | |
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162 ngx_log_error(NGX_LOG_INFO, c->log, 0, "*%uA %sclient %*s connected to %V", |
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163 c->number, c->type == SOCK_DGRAM ? "udp " : "", |
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164 len, text, &addr_conf->addr_text); |
6115 | 165 |
166 c->log->connection = c->number; | |
167 c->log->handler = ngx_stream_log_error; | |
168 c->log->data = s; | |
6693 | 169 c->log->action = "initializing session"; |
6115 | 170 c->log_error = NGX_ERROR_INFO; |
171 | |
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172 s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_stream_max_module); |
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173 if (s->ctx == NULL) { |
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174 ngx_stream_close_connection(c); |
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175 return; |
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176 } |
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177 |
6175 | 178 cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module); |
179 | |
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180 s->variables = ngx_pcalloc(s->connection->pool, |
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181 cmcf->variables.nelts |
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182 * sizeof(ngx_stream_variable_value_t)); |
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183 |
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184 if (s->variables == NULL) { |
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185 ngx_stream_close_connection(c); |
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186 return; |
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187 } |
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188 |
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189 tp = ngx_timeofday(); |
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190 s->start_sec = tp->sec; |
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191 s->start_msec = tp->msec; |
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192 |
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193 rev = c->read; |
6693 | 194 rev->handler = ngx_stream_session_handler; |
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195 |
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196 if (addr_conf->proxy_protocol) { |
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197 c->log->action = "reading PROXY protocol"; |
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198 |
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199 rev->handler = ngx_stream_proxy_protocol_handler; |
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200 |
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201 if (!rev->ready) { |
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202 ngx_add_timer(rev, cscf->proxy_protocol_timeout); |
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203 |
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204 if (ngx_handle_read_event(rev, 0) != NGX_OK) { |
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205 ngx_stream_finalize_session(s, |
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206 NGX_STREAM_INTERNAL_SERVER_ERROR); |
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207 } |
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208 |
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209 return; |
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210 } |
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211 } |
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212 |
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213 if (ngx_use_accept_mutex) { |
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214 ngx_post_event(rev, &ngx_posted_events); |
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215 return; |
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216 } |
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217 |
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218 rev->handler(rev); |
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219 } |
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220 |
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221 |
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222 static void |
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223 ngx_stream_proxy_protocol_handler(ngx_event_t *rev) |
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224 { |
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225 u_char *p, buf[NGX_PROXY_PROTOCOL_MAX_HEADER]; |
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226 size_t size; |
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227 ssize_t n; |
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228 ngx_err_t err; |
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229 ngx_connection_t *c; |
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230 ngx_stream_session_t *s; |
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231 ngx_stream_core_srv_conf_t *cscf; |
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232 |
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233 c = rev->data; |
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234 s = c->data; |
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235 |
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236 ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0, |
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237 "stream PROXY protocol handler"); |
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238 |
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239 if (rev->timedout) { |
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240 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
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241 ngx_stream_finalize_session(s, NGX_STREAM_OK); |
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242 return; |
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243 } |
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244 |
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245 n = recv(c->fd, (char *) buf, sizeof(buf), MSG_PEEK); |
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246 |
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247 err = ngx_socket_errno; |
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248 |
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249 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, "recv(): %z", n); |
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250 |
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251 if (n == -1) { |
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252 if (err == NGX_EAGAIN) { |
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253 rev->ready = 0; |
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254 |
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255 if (!rev->timer_set) { |
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256 cscf = ngx_stream_get_module_srv_conf(s, |
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257 ngx_stream_core_module); |
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258 |
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259 ngx_add_timer(rev, cscf->proxy_protocol_timeout); |
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260 } |
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261 |
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262 if (ngx_handle_read_event(rev, 0) != NGX_OK) { |
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263 ngx_stream_finalize_session(s, |
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264 NGX_STREAM_INTERNAL_SERVER_ERROR); |
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265 } |
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266 |
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267 return; |
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268 } |
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269 |
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270 ngx_connection_error(c, err, "recv() failed"); |
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271 |
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272 ngx_stream_finalize_session(s, NGX_STREAM_OK); |
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273 return; |
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274 } |
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275 |
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276 if (rev->timer_set) { |
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277 ngx_del_timer(rev); |
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278 } |
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279 |
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280 p = ngx_proxy_protocol_read(c, buf, buf + n); |
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281 |
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282 if (p == NULL) { |
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283 ngx_stream_finalize_session(s, NGX_STREAM_BAD_REQUEST); |
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284 return; |
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285 } |
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286 |
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287 size = p - buf; |
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288 |
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289 if (c->recv(c, buf, size) != (ssize_t) size) { |
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290 ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); |
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291 return; |
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292 } |
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293 |
6693 | 294 c->log->action = "initializing session"; |
295 | |
296 ngx_stream_session_handler(rev); | |
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297 } |
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298 |
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299 |
6693 | 300 void |
301 ngx_stream_session_handler(ngx_event_t *rev) | |
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302 { |
6693 | 303 ngx_connection_t *c; |
304 ngx_stream_session_t *s; | |
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305 |
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306 c = rev->data; |
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307 s = c->data; |
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308 |
6693 | 309 ngx_stream_core_run_phases(s); |
6115 | 310 } |
311 | |
312 | |
313 void | |
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314 ngx_stream_finalize_session(ngx_stream_session_t *s, ngx_uint_t rc) |
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315 { |
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316 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, |
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317 "finalize stream session: %i", rc); |
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318 |
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319 s->status = rc; |
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320 |
6693 | 321 ngx_stream_log_session(s); |
322 | |
323 ngx_stream_close_connection(s->connection); | |
324 } | |
325 | |
326 | |
327 static void | |
328 ngx_stream_log_session(ngx_stream_session_t *s) | |
329 { | |
330 ngx_uint_t i, n; | |
331 ngx_stream_handler_pt *log_handler; | |
332 ngx_stream_core_main_conf_t *cmcf; | |
333 | |
6678 | 334 cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module); |
335 | |
6693 | 336 log_handler = cmcf->phases[NGX_STREAM_LOG_PHASE].handlers.elts; |
337 n = cmcf->phases[NGX_STREAM_LOG_PHASE].handlers.nelts; | |
338 | |
339 for (i = 0; i < n; i++) { | |
340 log_handler[i](s); | |
6678 | 341 } |
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342 } |
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343 |
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344 |
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345 static void |
6115 | 346 ngx_stream_close_connection(ngx_connection_t *c) |
347 { | |
348 ngx_pool_t *pool; | |
349 | |
350 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, | |
351 "close stream connection: %d", c->fd); | |
352 | |
353 #if (NGX_STREAM_SSL) | |
354 | |
355 if (c->ssl) { | |
356 if (ngx_ssl_shutdown(c) == NGX_AGAIN) { | |
357 c->ssl->handler = ngx_stream_close_connection; | |
358 return; | |
359 } | |
360 } | |
361 | |
362 #endif | |
363 | |
364 #if (NGX_STAT_STUB) | |
365 (void) ngx_atomic_fetch_add(ngx_stat_active, -1); | |
366 #endif | |
367 | |
368 pool = c->pool; | |
369 | |
370 ngx_close_connection(c); | |
371 | |
372 ngx_destroy_pool(pool); | |
373 } | |
374 | |
375 | |
376 static u_char * | |
377 ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len) | |
378 { | |
379 u_char *p; | |
380 ngx_stream_session_t *s; | |
381 | |
382 if (log->action) { | |
383 p = ngx_snprintf(buf, len, " while %s", log->action); | |
384 len -= p - buf; | |
385 buf = p; | |
386 } | |
387 | |
388 s = log->data; | |
389 | |
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390 p = ngx_snprintf(buf, len, ", %sclient: %V, server: %V", |
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391 s->connection->type == SOCK_DGRAM ? "udp " : "", |
6115 | 392 &s->connection->addr_text, |
393 &s->connection->listening->addr_text); | |
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394 len -= p - buf; |
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395 buf = p; |
6115 | 396 |
397 if (s->log_handler) { | |
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398 p = s->log_handler(log, buf, len); |
6115 | 399 } |
400 | |
401 return p; | |
402 } |