| | varnish-cache/bin/varnishd/http1/cache_http1_fsm.c |
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/*- |
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* Copyright (c) 2006 Verdens Gang AS |
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* Copyright (c) 2006-2015 Varnish Software AS |
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* All rights reserved. |
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* |
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* Author: Poul-Henning Kamp <phk@phk.freebsd.dk> |
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* |
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* SPDX-License-Identifier: BSD-2-Clause |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* This file contains the two central state machine for pushing HTTP1 |
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* sessions through their states. |
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* |
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*/ |
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#include "config.h" |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include "cache/cache_varnishd.h" |
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#include "cache/cache_objhead.h" |
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#include "cache/cache_transport.h" |
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#include "cache_http1.h" |
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|
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#include "vtcp.h" |
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|
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static const char H1NEWREQ[] = "HTTP1::NewReq"; |
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static const char H1PROC[] = "HTTP1::Proc"; |
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static const char H1CLEANUP[] = "HTTP1::Cleanup"; |
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|
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static void HTTP1_Session(struct worker *, struct req *); |
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|
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static void |
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451297 |
http1_setstate(const struct sess *sp, const char *s) |
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{ |
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uintptr_t p; |
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|
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451297 |
p = (uintptr_t)s; |
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451297 |
AZ(SES_Set_proto_priv(sp, &p)); |
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451297 |
} |
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|
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static const char * |
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540388 |
http1_getstate(const struct sess *sp) |
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{ |
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uintptr_t *p; |
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|
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540388 |
AZ(SES_Get_proto_priv(sp, &p)); |
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540388 |
return ((const char *)*p); |
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} |
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|
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/*-------------------------------------------------------------------- |
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* Call protocol for this request |
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*/ |
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|
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static void v_matchproto_(task_func_t) |
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91693 |
http1_req(struct worker *wrk, void *arg) |
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{ |
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struct req *req; |
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|
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91693 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
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91693 |
CAST_OBJ_NOTNULL(req, arg, REQ_MAGIC); |
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|
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91693 |
THR_SetRequest(req); |
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91693 |
assert(!WS_IsReserved(wrk->aws)); |
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91693 |
HTTP1_Session(wrk, req); |
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91693 |
WS_Assert(wrk->aws); |
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91693 |
THR_SetRequest(NULL); |
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91693 |
} |
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|
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/*-------------------------------------------------------------------- |
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* Call protocol for this session (new or from waiter) |
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* |
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* When sessions are rescheduled from the waiter, a struct pool_task |
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* is put on the reserved session workspace (for reasons of memory |
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* conservation). This reservation is released as the first thing. |
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* The acceptor and any other code which schedules this function |
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* must obey this calling convention with a dummy reservation. |
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*/ |
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|
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static void v_matchproto_(task_func_t) |
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83465 |
http1_new_session(struct worker *wrk, void *arg) |
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{ |
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struct sess *sp; |
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struct req *req; |
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uintptr_t *u; |
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ssize_t sz; |
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|
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83465 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
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83465 |
CAST_OBJ_NOTNULL(req, arg, REQ_MAGIC); |
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83465 |
sp = req->sp; |
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83465 |
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC); |
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|
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83465 |
HTC_RxInit(req->htc, req->ws); |
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|
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83465 |
sz = sizeof u; |
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83465 |
if (SES_Get_proto_priv(sp, &u) && |
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83456 |
!SES_Reserve_proto_priv(sp, &u, &sz)) { |
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/* Out of session workspace. Free the req, close the sess, |
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* and do not set a new task func, which will exit the |
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* worker thread. */ |
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40 |
VSL(SLT_Error, req->sp->vxid, |
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"insufficient workspace (proto_priv)"); |
123 |
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WS_Release(req->ws, 0); |
124 |
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Req_Release(req); |
125 |
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SES_Delete(sp, SC_RX_JUNK, NAN); |
126 |
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return; |
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} |
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83425 |
assert(sz == sizeof u); |
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83419 |
http1_setstate(sp, H1NEWREQ); |
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83419 |
wrk->task->func = http1_req; |
131 |
83419 |
wrk->task->priv = req; |
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83459 |
} |
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|
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static void v_matchproto_(task_func_t) |
135 |
5602 |
http1_unwait(struct worker *wrk, void *arg) |
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{ |
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struct sess *sp; |
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struct req *req; |
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|
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5602 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
141 |
5602 |
CAST_OBJ_NOTNULL(sp, arg, SESS_MAGIC); |
142 |
5602 |
WS_Release(sp->ws, 0); |
143 |
5602 |
req = Req_New(sp); |
144 |
5602 |
CHECK_OBJ_NOTNULL(req, REQ_MAGIC); |
145 |
5602 |
req->htc->rfd = &sp->fd; |
146 |
5602 |
HTC_RxInit(req->htc, req->ws); |
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http1_setstate(sp, H1NEWREQ); |
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5602 |
wrk->task->func = http1_req; |
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wrk->task->priv = req; |
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5602 |
} |
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|
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static void v_matchproto_(vtr_req_body_t) |
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3400 |
http1_req_body(struct req *req) |
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{ |
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|
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3400 |
CHECK_OBJ_NOTNULL(req, REQ_MAGIC); |
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3400 |
if (V1F_Setup_Fetch(req->vfc, req->htc) != 0) |
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0 |
req->req_body_status = BS_ERROR; |
159 |
3400 |
} |
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|
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static void |
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240 |
http1_sess_panic(struct vsb *vsb, const struct sess *sp) |
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{ |
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|
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VSB_printf(vsb, "state = %s\n", http1_getstate(sp)); |
166 |
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} |
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|
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static void |
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200 |
http1_req_panic(struct vsb *vsb, const struct req *req) |
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{ |
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|
172 |
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VSB_printf(vsb, "state = %s\n", http1_getstate(req->sp)); |
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} |
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|
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static void v_matchproto_(vtr_req_fail_f) |
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1120 |
http1_req_fail(struct req *req, stream_close_t reason) |
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{ |
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1120 |
assert(reason != SC_NULL); |
179 |
1120 |
assert(req->sp->fd != 0); |
180 |
1120 |
if (req->sp->fd > 0) |
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1120 |
SES_Close(req->sp, reason); |
182 |
1120 |
} |
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|
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static int v_matchproto_(vtr_minimal_response_f) |
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1920 |
http1_minimal_response(struct req *req, uint16_t status) |
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{ |
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ssize_t wl, l; |
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char buf[80]; |
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const char *reason; |
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|
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1920 |
assert(status >= 100); |
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assert(status < 1000); |
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|
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reason = http_Status2Reason(status, NULL); |
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|
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bprintf(buf, "HTTP/1.1 %03d %s\r\n\r\n", status, reason); |
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l = strlen(buf); |
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|
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VSLb(req->vsl, SLT_RespProtocol, "HTTP/1.1"); |
200 |
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VSLb(req->vsl, SLT_RespStatus, "%03d", status); |
201 |
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VSLbs(req->vsl, SLT_RespReason, TOSTRAND(reason)); |
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|
203 |
1920 |
if (status >= 400) |
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1720 |
req->err_code = status; |
205 |
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wl = write(req->sp->fd, buf, l); |
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|
207 |
1920 |
if (wl > 0) |
208 |
1920 |
req->acct.resp_hdrbytes += wl; |
209 |
1920 |
if (wl != l) { |
210 |
0 |
if (wl < 0) |
211 |
0 |
VTCP_Assert(1); |
212 |
0 |
if (req->doclose == SC_NULL) |
213 |
0 |
req->doclose = SC_REM_CLOSE; |
214 |
0 |
return (-1); |
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} |
216 |
1920 |
return (0); |
217 |
1920 |
} |
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|
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struct transport HTTP1_transport = { |
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.name = "HTTP/1", |
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.proto_ident = "HTTP", |
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.magic = TRANSPORT_MAGIC, |
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.deliver = V1D_Deliver, |
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.minimal_response = http1_minimal_response, |
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.new_session = http1_new_session, |
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.req_body = http1_req_body, |
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.req_fail = http1_req_fail, |
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.req_panic = http1_req_panic, |
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.sess_panic = http1_sess_panic, |
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.unwait = http1_unwait, |
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}; |
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|
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/*---------------------------------------------------------------------- |
234 |
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*/ |
235 |
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|
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static inline void |
237 |
1320 |
http1_abort(struct req *req, uint16_t status) |
238 |
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{ |
239 |
1320 |
assert(req->doclose != SC_NULL); |
240 |
1320 |
assert(status >= 400); |
241 |
1320 |
(void)http1_minimal_response(req, status); |
242 |
1320 |
} |
243 |
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|
244 |
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static int |
245 |
126286 |
http1_dissect(struct worker *wrk, struct req *req) |
246 |
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{ |
247 |
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|
248 |
126286 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
249 |
126286 |
CHECK_OBJ_NOTNULL(req, REQ_MAGIC); |
250 |
126286 |
CHECK_OBJ_NOTNULL(req->transport, TRANSPORT_MAGIC); |
251 |
|
|
252 |
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/* Allocate a new vxid now that we know we'll need it. */ |
253 |
126286 |
assert(IS_NO_VXID(req->vsl->wid)); |
254 |
126286 |
req->vsl->wid = VXID_Get(wrk, VSL_CLIENTMARKER); |
255 |
|
|
256 |
126286 |
VSLb(req->vsl, SLT_Begin, "req %ju rxreq", VXID(req->sp->vxid)); |
257 |
126286 |
VSL(SLT_Link, req->sp->vxid, "req %ju rxreq", VXID(req->vsl->wid)); |
258 |
126286 |
AZ(isnan(req->t_first)); /* First byte timestamp set by http1_wait */ |
259 |
126286 |
AZ(isnan(req->t_req)); /* Complete req rcvd set by http1_wait */ |
260 |
126286 |
req->t_prev = req->t_first; |
261 |
126286 |
VSLb_ts_req(req, "Start", req->t_first); |
262 |
126286 |
VSLb_ts_req(req, "Req", req->t_req); |
263 |
|
|
264 |
126286 |
HTTP_Setup(req->http, req->ws, req->vsl, SLT_ReqMethod); |
265 |
126286 |
req->err_code = HTTP1_DissectRequest(req->htc, req->http); |
266 |
|
|
267 |
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/* If we could not even parse the request, just close */ |
268 |
126286 |
if (req->err_code != 0) { |
269 |
2640 |
VSLb(req->vsl, SLT_HttpGarbage, "%.*s", |
270 |
1320 |
(int)(req->htc->rxbuf_e - req->htc->rxbuf_b), |
271 |
1320 |
req->htc->rxbuf_b); |
272 |
1320 |
wrk->stats->client_req_400++; |
273 |
|
|
274 |
1320 |
(void)Req_LogStart(wrk, req); |
275 |
|
|
276 |
1320 |
req->doclose = SC_RX_JUNK; |
277 |
1320 |
http1_abort(req, 400); |
278 |
1320 |
return (-1); |
279 |
|
} |
280 |
|
|
281 |
124966 |
AZ(req->req_body_status); |
282 |
124966 |
req->req_body_status = req->htc->body_status; |
283 |
124966 |
return (0); |
284 |
126286 |
} |
285 |
|
|
286 |
|
/*---------------------------------------------------------------------- |
287 |
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*/ |
288 |
|
|
289 |
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static void |
290 |
91435 |
HTTP1_Session(struct worker *wrk, struct req *req) |
291 |
|
{ |
292 |
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enum htc_status_e hs; |
293 |
|
struct sess *sp; |
294 |
|
const char *st; |
295 |
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int i; |
296 |
|
|
297 |
91435 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
298 |
91435 |
CHECK_OBJ_NOTNULL(req, REQ_MAGIC); |
299 |
91435 |
sp = req->sp; |
300 |
91435 |
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC); |
301 |
|
|
302 |
|
/* |
303 |
|
* Whenever we come in from the acceptor or waiter, we need to set |
304 |
|
* blocking mode. It would be simpler to do this in the acceptor |
305 |
|
* or waiter, but we'd rather do the syscall in the worker thread. |
306 |
|
*/ |
307 |
91435 |
if (http1_getstate(sp) == H1NEWREQ) |
308 |
89023 |
VTCP_blocking(sp->fd); |
309 |
91435 |
req->transport = XPORT_ByNumber(sp->sattr[SA_TRANSPORT]); |
310 |
|
|
311 |
446656 |
while (1) { |
312 |
448056 |
st = http1_getstate(sp); |
313 |
448056 |
if (st == H1NEWREQ) { |
314 |
195054 |
CHECK_OBJ_NOTNULL(req->transport, TRANSPORT_MAGIC); |
315 |
195054 |
assert(isnan(req->t_prev)); |
316 |
195054 |
assert(isnan(req->t_req)); |
317 |
195054 |
AZ(req->vcl); |
318 |
195054 |
AZ(req->esi_level); |
319 |
195054 |
AN(WS_Reservation(req->htc->ws)); |
320 |
|
|
321 |
390108 |
hs = HTC_RxStuff(req->htc, HTTP1_Complete, |
322 |
195054 |
&req->t_first, &req->t_req, |
323 |
195054 |
sp->t_idle + SESS_TMO(sp, timeout_linger), |
324 |
195054 |
sp->t_idle + SESS_TMO(sp, timeout_idle), |
325 |
|
NAN, |
326 |
195054 |
cache_param->http_req_size); |
327 |
195054 |
assert(!WS_IsReserved(req->htc->ws)); |
328 |
195054 |
if (hs < HTC_S_EMPTY) { |
329 |
56158 |
req->acct.req_hdrbytes += |
330 |
56158 |
req->htc->rxbuf_e - req->htc->rxbuf_b; |
331 |
56158 |
Req_AcctLogCharge(wrk->stats, req); |
332 |
56158 |
Req_Release(req); |
333 |
56158 |
SES_DeleteHS(sp, hs, NAN); |
334 |
56158 |
return; |
335 |
|
} |
336 |
138896 |
if (hs == HTC_S_IDLE) { |
337 |
7134 |
wrk->stats->sess_herd++; |
338 |
7134 |
Req_Release(req); |
339 |
7134 |
SES_Wait(sp, &HTTP1_transport); |
340 |
7134 |
return; |
341 |
|
} |
342 |
131762 |
if (hs != HTC_S_COMPLETE) |
343 |
0 |
WRONG("htc_status (nonbad)"); |
344 |
|
|
345 |
131762 |
if (H2_prism_complete(req->htc) == HTC_S_COMPLETE) { |
346 |
5480 |
if (!FEATURE(FEATURE_HTTP2)) { |
347 |
80 |
SES_Close(req->sp, SC_REQ_HTTP20); |
348 |
80 |
assert(!WS_IsReserved(req->ws)); |
349 |
80 |
assert(!WS_IsReserved(wrk->aws)); |
350 |
80 |
http1_setstate(sp, H1CLEANUP); |
351 |
80 |
continue; |
352 |
|
} |
353 |
5400 |
http1_setstate(sp, NULL); |
354 |
5400 |
H2_PU_Sess(wrk, sp, req); |
355 |
5400 |
return; |
356 |
|
} |
357 |
|
|
358 |
126282 |
i = http1_dissect(wrk, req); |
359 |
126282 |
req->acct.req_hdrbytes += |
360 |
126282 |
req->htc->rxbuf_e - req->htc->rxbuf_b; |
361 |
126282 |
if (i) { |
362 |
1320 |
assert(req->doclose != SC_NULL); |
363 |
1320 |
SES_Close(req->sp, req->doclose); |
364 |
1320 |
assert(!WS_IsReserved(req->ws)); |
365 |
1320 |
assert(!WS_IsReserved(wrk->aws)); |
366 |
1320 |
http1_setstate(sp, H1CLEANUP); |
367 |
1320 |
continue; |
368 |
|
} |
369 |
124962 |
if (http_HdrIs(req->http, H_Upgrade, "h2c")) { |
370 |
360 |
if (!FEATURE(FEATURE_HTTP2)) { |
371 |
40 |
VSLb(req->vsl, SLT_Debug, |
372 |
|
"H2 upgrade attempt"); |
373 |
360 |
} else if (req->htc->body_status != BS_NONE) { |
374 |
40 |
VSLb(req->vsl, SLT_Debug, |
375 |
|
"H2 upgrade attempt has body"); |
376 |
40 |
} else { |
377 |
280 |
http1_setstate(sp, NULL); |
378 |
280 |
req->err_code = 2; |
379 |
280 |
H2_OU_Sess(wrk, sp, req); |
380 |
280 |
return; |
381 |
|
} |
382 |
80 |
} |
383 |
124682 |
assert(req->req_step == R_STP_TRANSPORT); |
384 |
124682 |
VCL_TaskEnter(req->privs); |
385 |
124682 |
VCL_TaskEnter(req->top->privs); |
386 |
124682 |
http1_setstate(sp, H1PROC); |
387 |
377684 |
} else if (st == H1PROC) { |
388 |
127136 |
req->task->func = http1_req; |
389 |
127136 |
req->task->priv = req; |
390 |
127136 |
CNT_Embark(wrk, req); |
391 |
127136 |
if (CNT_Request(req) == REQ_FSM_DISEMBARK) |
392 |
2677 |
return; |
393 |
124459 |
wrk->stats->client_req++; |
394 |
124459 |
AZ(req->top->vcl0); |
395 |
124459 |
req->task->func = NULL; |
396 |
124459 |
req->task->priv = NULL; |
397 |
124459 |
assert(!WS_IsReserved(req->ws)); |
398 |
124459 |
assert(!WS_IsReserved(wrk->aws)); |
399 |
124459 |
http1_setstate(sp, H1CLEANUP); |
400 |
250325 |
} else if (st == H1CLEANUP) { |
401 |
|
|
402 |
125866 |
assert(!WS_IsReserved(wrk->aws)); |
403 |
125866 |
assert(!WS_IsReserved(req->ws)); |
404 |
|
|
405 |
125866 |
if (sp->fd >= 0 && req->doclose != SC_NULL) |
406 |
16266 |
SES_Close(sp, req->doclose); |
407 |
|
|
408 |
125866 |
if (sp->fd < 0) { |
409 |
19786 |
wrk->stats->sess_closed++; |
410 |
19786 |
Req_Cleanup(sp, wrk, req); |
411 |
19786 |
Req_Release(req); |
412 |
19786 |
SES_Delete(sp, SC_NULL, NAN); |
413 |
19786 |
return; |
414 |
|
} |
415 |
|
|
416 |
106080 |
Req_Cleanup(sp, wrk, req); |
417 |
106080 |
HTC_RxInit(req->htc, req->ws); |
418 |
106080 |
if (req->htc->rxbuf_e != req->htc->rxbuf_b) |
419 |
585 |
wrk->stats->sess_readahead++; |
420 |
106080 |
if (FEATURE(FEATURE_BUSY_STATS_RATE)) |
421 |
0 |
WRK_AddStat(wrk); |
422 |
106080 |
http1_setstate(sp, H1NEWREQ); |
423 |
106080 |
} else { |
424 |
0 |
WRONG("Wrong H1 session state"); |
425 |
|
} |
426 |
|
} |
427 |
91435 |
} |