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cache_http2_proto.c
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cache_http2_proto.c
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/*-
* Copyright (c) 2016-2019 Varnish Software AS
* All rights reserved.
*
* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include "config.h"
#include "cache/cache_varnishd.h"
#include <stdio.h>
#include <stdlib.h>
#include "cache/cache_transport.h"
#include "cache/cache_filter.h"
#include "http2/cache_http2.h"
#include "cache/cache_objhead.h"
#include "vend.h"
#include "vtcp.h"
#include "vtim.h"
#define H2EC1(U,v,d) const struct h2_error_s H2CE_##U[1] = {{#U,d,v,0,1}};
#define H2EC2(U,v,d) const struct h2_error_s H2SE_##U[1] = {{#U,d,v,1,0}};
#define H2EC3(U,v,d) H2EC1(U,v,d) H2EC2(U,v,d)
#define H2_ERROR(NAME, val, sc, desc) H2EC##sc(NAME, val, desc)
#include "tbl/h2_error.h"
#undef H2EC1
#undef H2EC2
#undef H2EC3
static const struct h2_error_s H2NN_ERROR[1] = {{
"UNKNOWN_ERROR",
"Unknown error number",
0xffffffff,
1,
1
}};
enum h2frame {
#define H2_FRAME(l,u,t,f,...) H2F_##u = t,
#include "tbl/h2_frames.h"
};
static const char *
h2_framename(enum h2frame h2f)
{
switch (h2f) {
#define H2_FRAME(l,u,t,f,...) case H2F_##u: return #u;
#include "tbl/h2_frames.h"
default:
return (NULL);
}
}
#define H2_FRAME_FLAGS(l,u,v) const uint8_t H2FF_##u = v;
#include "tbl/h2_frames.h"
/**********************************************************************
*/
static const h2_error stream_errors[] = {
#define H2EC1(U,v,d)
#define H2EC2(U,v,d) [v] = H2SE_##U,
#define H2EC3(U,v,d) H2EC1(U,v,d) H2EC2(U,v,d)
#define H2_ERROR(NAME, val, sc, desc) H2EC##sc(NAME, val, desc)
#include "tbl/h2_error.h"
#undef H2EC1
#undef H2EC2
#undef H2EC3
};
#define NSTREAMERRORS (sizeof(stream_errors)/sizeof(stream_errors[0]))
static h2_error
h2_streamerror(uint32_t u)
{
if (u < NSTREAMERRORS && stream_errors[u] != NULL)
return (stream_errors[u]);
else
return (H2NN_ERROR);
}
/**********************************************************************
*/
static const h2_error conn_errors[] = {
#define H2EC1(U,v,d) [v] = H2CE_##U,
#define H2EC2(U,v,d)
#define H2EC3(U,v,d) H2EC1(U,v,d) H2EC2(U,v,d)
#define H2_ERROR(NAME, val, sc, desc) H2EC##sc(NAME, val, desc)
#include "tbl/h2_error.h"
#undef H2EC1
#undef H2EC2
#undef H2EC3
};
#define NCONNERRORS (sizeof(conn_errors)/sizeof(conn_errors[0]))
static h2_error
h2_connectionerror(uint32_t u)
{
if (u < NCONNERRORS && conn_errors[u] != NULL)
return (conn_errors[u]);
else
return (H2NN_ERROR);
}
/**********************************************************************/
struct h2_req *
h2_new_req(const struct worker *wrk, struct h2_sess *h2,
unsigned stream, struct req *req)
{
struct h2_req *r2;
ASSERT_RXTHR(h2);
if (req == NULL)
req = Req_New(wrk, h2->sess);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
r2 = WS_Alloc(req->ws, sizeof *r2);
AN(r2);
INIT_OBJ(r2, H2_REQ_MAGIC);
r2->state = H2_S_IDLE;
r2->h2sess = h2;
r2->stream = stream;
r2->req = req;
if (stream)
r2->counted = 1;
r2->r_window = h2->local_settings.initial_window_size;
r2->t_window = h2->remote_settings.initial_window_size;
req->transport_priv = r2;
Lck_Lock(&h2->sess->mtx);
if (stream)
h2->open_streams++;
VTAILQ_INSERT_TAIL(&h2->streams, r2, list);
Lck_Unlock(&h2->sess->mtx);
h2->refcnt++;
return (r2);
}
void
h2_del_req(struct worker *wrk, const struct h2_req *r2)
{
struct h2_sess *h2;
struct sess *sp;
CHECK_OBJ_NOTNULL(r2, H2_REQ_MAGIC);
AZ(r2->scheduled);
h2 = r2->h2sess;
CHECK_OBJ_NOTNULL(h2, H2_SESS_MAGIC);
ASSERT_RXTHR(h2);
sp = h2->sess;
Lck_Lock(&sp->mtx);
assert(h2->refcnt > 0);
--h2->refcnt;
/* XXX: PRIORITY reshuffle */
VTAILQ_REMOVE(&h2->streams, r2, list);
Lck_Unlock(&sp->mtx);
AZ(r2->req->ws->r);
Req_Cleanup(sp, wrk, r2->req);
Req_Release(r2->req);
}
void
h2_kill_req(struct worker *wrk, struct h2_sess *h2,
struct h2_req *r2, h2_error h2e)
{
ASSERT_RXTHR(h2);
AN(h2e);
Lck_Lock(&h2->sess->mtx);
VSLb(h2->vsl, SLT_Debug, "KILL st=%u state=%d sched=%d",
r2->stream, r2->state, r2->scheduled);
if (r2->counted) {
assert(h2->open_streams > 0);
h2->open_streams--;
r2->counted = 0;
}
if (r2->error == NULL)
r2->error = h2e;
if (r2->scheduled) {
if (r2->cond != NULL)
AZ(pthread_cond_signal(r2->cond));
r2 = NULL;
} else {
if (r2->state == H2_S_OPEN && h2->new_req == r2->req)
(void)h2h_decode_fini(h2);
}
Lck_Unlock(&h2->sess->mtx);
if (r2 != NULL)
h2_del_req(wrk, r2);
}
/**********************************************************************/
static void
h2_vsl_frame(const struct h2_sess *h2, const void *ptr, size_t len)
{
const uint8_t *b;
struct vsb *vsb;
const char *p;
unsigned u;
AN(ptr);
assert(len >= 9);
b = ptr;
vsb = VSB_new_auto();
AN(vsb);
p = h2_framename((enum h2frame)b[3]);
if (p != NULL)
VSB_cat(vsb, p);
else
VSB_quote(vsb, b + 3, 1, VSB_QUOTE_HEX);
u = vbe32dec(b) >> 8;
VSB_printf(vsb, "[%u] ", u);
VSB_quote(vsb, b + 4, 1, VSB_QUOTE_HEX);
VSB_putc(vsb, ' ');
VSB_quote(vsb, b + 5, 4, VSB_QUOTE_HEX);
if (u > 0) {
VSB_putc(vsb, ' ');
VSB_quote(vsb, b + 9, len - 9, VSB_QUOTE_HEX);
}
AZ(VSB_finish(vsb));
Lck_Lock(&h2->sess->mtx);
VSLb_bin(h2->vsl, SLT_H2RxHdr, 9, b);
if (len > 9)
VSLb_bin(h2->vsl, SLT_H2RxBody, len - 9, b + 9);
VSLb(h2->vsl, SLT_Debug, "H2RXF %s", VSB_data(vsb));
Lck_Unlock(&h2->sess->mtx);
VSB_destroy(&vsb);
}
/**********************************************************************
*/
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_ping(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
CHECK_OBJ_NOTNULL(r2, H2_REQ_MAGIC);
assert(r2 == h2->req0);
if (h2->rxf_len != 8) // rfc7540,l,2364,2366
return (H2CE_FRAME_SIZE_ERROR);
AZ(h2->rxf_stream); // rfc7540,l,2359,2362
if (h2->rxf_flags != 0) // We never send pings
return (H2SE_PROTOCOL_ERROR);
H2_Send_Get(wrk, h2, r2);
H2_Send_Frame(wrk, h2,
H2_F_PING, H2FF_PING_ACK, 8, 0, h2->rxf_data);
H2_Send_Rel(h2, r2);
return (0);
}
/**********************************************************************
*/
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_push_promise(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
CHECK_OBJ_ORNULL(r2, H2_REQ_MAGIC);
// rfc7540,l,2262,2267
return (H2CE_PROTOCOL_ERROR);
}
/**********************************************************************
*/
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_rst_stream(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
CHECK_OBJ_ORNULL(r2, H2_REQ_MAGIC);
if (h2->rxf_len != 4) // rfc7540,l,2003,2004
return (H2CE_FRAME_SIZE_ERROR);
if (r2 == NULL)
return (0);
h2_kill_req(wrk, h2, r2, h2_streamerror(vbe32dec(h2->rxf_data)));
return (0);
}
/**********************************************************************
*/
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_goaway(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
CHECK_OBJ_NOTNULL(r2, H2_REQ_MAGIC);
assert(r2 == h2->req0);
h2->goaway_last_stream = vbe32dec(h2->rxf_data);
h2->error = h2_connectionerror(vbe32dec(h2->rxf_data + 4));
Lck_Lock(&h2->sess->mtx);
VSLb(h2->vsl, SLT_Debug, "GOAWAY %s", h2->error->name);
Lck_Unlock(&h2->sess->mtx);
return (h2->error);
}
/**********************************************************************
*/
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_window_update(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
uint32_t wu;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
CHECK_OBJ_ORNULL(r2, H2_REQ_MAGIC);
if (h2->rxf_len != 4)
return (H2CE_FRAME_SIZE_ERROR);
wu = vbe32dec(h2->rxf_data) & ~(1LU<<31);
if (wu == 0)
return (H2SE_PROTOCOL_ERROR);
if (r2 == NULL)
return (0);
Lck_Lock(&h2->sess->mtx);
r2->t_window += wu;
if (r2 == h2->req0)
AZ(pthread_cond_broadcast(h2->winupd_cond));
else if (r2->cond != NULL)
AZ(pthread_cond_signal(r2->cond));
Lck_Unlock(&h2->sess->mtx);
if (r2->t_window >= (1LL << 31))
return (H2SE_FLOW_CONTROL_ERROR);
return (0);
}
/**********************************************************************
* Incoming PRIORITY, possibly an ACK of one we sent.
*/
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_priority(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
CHECK_OBJ_ORNULL(r2, H2_REQ_MAGIC);
return (0);
}
/**********************************************************************
* Incoming SETTINGS, possibly an ACK of one we sent.
*/
#define H2_SETTING(U,l, ...) \
static void v_matchproto_(h2_setsetting_f) \
h2_setting_##l(struct h2_settings* s, uint32_t v) \
{ \
s -> l = v; \
}
#include <tbl/h2_settings.h>
#define H2_SETTING(U, l, ...) \
const struct h2_setting_s H2_SET_##U[1] = {{ \
#l, \
h2_setting_##l, \
__VA_ARGS__ \
}};
#include <tbl/h2_settings.h>
static const struct h2_setting_s * const h2_setting_tbl[] = {
#define H2_SETTING(U,l,v, ...) [v] = H2_SET_##U,
#include <tbl/h2_settings.h>
};
#define H2_SETTING_TBL_LEN (sizeof(h2_setting_tbl)/sizeof(h2_setting_tbl[0]))
static void
h2_win_adjust(const struct h2_sess *h2, uint32_t oldval, uint32_t newval)
{
struct h2_req *r2;
Lck_AssertHeld(&h2->sess->mtx);
// rfc7540,l,2668,2674
VTAILQ_FOREACH(r2, &h2->streams, list) {
CHECK_OBJ_NOTNULL(r2, H2_REQ_MAGIC);
if (r2 == h2->req0)
continue; // rfc7540,l,2699,2699
switch (r2->state) {
case H2_S_IDLE:
case H2_S_OPEN:
case H2_S_CLOS_REM:
/*
* We allow a window to go negative, as per
* rfc7540,l,2676,2680
*/
r2->t_window += (int64_t)newval - oldval;
break;
default:
break;
}
}
}
h2_error
h2_set_setting(struct h2_sess *h2, const uint8_t *d)
{
const struct h2_setting_s *s;
uint16_t x;
uint32_t y;
x = vbe16dec(d);
y = vbe32dec(d + 2);
if (x >= H2_SETTING_TBL_LEN || h2_setting_tbl[x] == NULL) {
// rfc7540,l,2181,2182
Lck_Lock(&h2->sess->mtx);
VSLb(h2->vsl, SLT_Debug,
"H2SETTING unknown setting 0x%04x=%08x (ignored)", x, y);
Lck_Unlock(&h2->sess->mtx);
return (0);
}
s = h2_setting_tbl[x];
AN(s);
if (y < s->minval || y > s->maxval) {
Lck_Lock(&h2->sess->mtx);
VSLb(h2->vsl, SLT_Debug, "H2SETTING invalid %s=0x%08x",
s->name, y);
Lck_Unlock(&h2->sess->mtx);
AN(s->range_error);
if (!DO_DEBUG(DBG_H2_NOCHECK))
return (s->range_error);
}
Lck_Lock(&h2->sess->mtx);
if (s == H2_SET_INITIAL_WINDOW_SIZE)
h2_win_adjust(h2, h2->remote_settings.initial_window_size, y);
VSLb(h2->vsl, SLT_Debug, "H2SETTING %s=0x%08x", s->name, y);
Lck_Unlock(&h2->sess->mtx);
AN(s->setfunc);
s->setfunc(&h2->remote_settings, y);
return (0);
}
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_settings(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
const uint8_t *p;
unsigned l;
h2_error retval = 0;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
CHECK_OBJ_NOTNULL(r2, H2_REQ_MAGIC);
assert(r2 == h2->req0);
AZ(h2->rxf_stream);
if (h2->rxf_flags == H2FF_SETTINGS_ACK) {
if (h2->rxf_len > 0) // rfc7540,l,2047,2049
return (H2CE_FRAME_SIZE_ERROR);
return (0);
} else {
if (h2->rxf_len % 6) // rfc7540,l,2062,2064
return (H2CE_PROTOCOL_ERROR);
p = h2->rxf_data;
for (l = h2->rxf_len; l >= 6; l -= 6, p += 6) {
retval = h2_set_setting(h2, p);
if (retval)
return (retval);
}
H2_Send_Get(wrk, h2, r2);
H2_Send_Frame(wrk, h2,
H2_F_SETTINGS, H2FF_SETTINGS_ACK, 0, 0, NULL);
H2_Send_Rel(h2, r2);
}
return (0);
}
/**********************************************************************
* Incoming HEADERS, this is where the partys at...
*/
void v_matchproto_(task_func_t)
h2_do_req(struct worker *wrk, void *priv)
{
struct req *req;
struct h2_req *r2;
struct h2_sess *h2;
CAST_OBJ_NOTNULL(req, priv, REQ_MAGIC);
CAST_OBJ_NOTNULL(r2, req->transport_priv, H2_REQ_MAGIC);
THR_SetRequest(req);
CNT_Embark(wrk, req);
if (req->req_step == R_STP_TRANSPORT)
VCL_TaskEnter(req->vcl, req->privs);
wrk->stats->client_req++;
if (CNT_Request(req) != REQ_FSM_DISEMBARK) {
AZ(req->ws->r);
AZ(req->top->vcl0);
h2 = r2->h2sess;
CHECK_OBJ_NOTNULL(h2, H2_SESS_MAGIC);
Lck_Lock(&h2->sess->mtx);
r2->scheduled = 0;
r2->state = H2_S_CLOSED;
r2->h2sess->do_sweep = 1;
if (h2->mailcall == r2) {
h2->mailcall = NULL;
AZ(pthread_cond_signal(h2->cond));
}
Lck_Unlock(&h2->sess->mtx);
}
THR_SetRequest(NULL);
}
static h2_error
h2_end_headers(struct worker *wrk, struct h2_sess *h2,
struct req *req, struct h2_req *r2)
{
h2_error h2e;
ASSERT_RXTHR(h2);
assert(r2->state == H2_S_OPEN);
h2e = h2h_decode_fini(h2);
h2->new_req = NULL;
if (r2->req->req_body_status == REQ_BODY_NONE) {
/* REQ_BODY_NONE implies one of the frames in the
* header block contained END_STREAM */
r2->state = H2_S_CLOS_REM;
}
if (h2e != NULL) {
Lck_Lock(&h2->sess->mtx);
VSLb(h2->vsl, SLT_Debug, "HPACK/FINI %s", h2e->name);
Lck_Unlock(&h2->sess->mtx);
AZ(r2->req->ws->r);
h2_del_req(wrk, r2);
return (h2e);
}
VSLb_ts_req(req, "Req", req->t_req);
// XXX: Smarter to do this already at HPACK time into tail end of
// XXX: WS, then copy back once all headers received.
// XXX: Have I mentioned H/2 Is hodge-podge ?
http_CollectHdrSep(req->http, H_Cookie, "; "); // rfc7540,l,3114,3120
if (req->req_body_status == REQ_BODY_INIT) {
if (!http_GetHdr(req->http, H_Content_Length, NULL))
req->req_body_status = REQ_BODY_WITHOUT_LEN;
else
req->req_body_status = REQ_BODY_WITH_LEN;
} else {
assert (req->req_body_status == REQ_BODY_NONE);
if (http_GetContentLength(req->http) > 0)
return (H2CE_PROTOCOL_ERROR); //rfc7540,l,1838,1840
}
if (req->http->hd[HTTP_HDR_METHOD].b == NULL) {
VSLb(h2->vsl, SLT_Debug, "Missing :method");
return (H2SE_PROTOCOL_ERROR); //rfc7540,l,3087,3090
}
if (req->http->hd[HTTP_HDR_URL].b == NULL) {
VSLb(h2->vsl, SLT_Debug, "Missing :path");
return (H2SE_PROTOCOL_ERROR); //rfc7540,l,3087,3090
}
AN(req->http->hd[HTTP_HDR_PROTO].b);
req->req_step = R_STP_TRANSPORT;
req->task.func = h2_do_req;
req->task.priv = req;
r2->scheduled = 1;
if (Pool_Task(wrk->pool, &req->task, TASK_QUEUE_STR) != 0) {
r2->scheduled = 0;
r2->state = H2_S_CLOSED;
return (H2SE_REFUSED_STREAM); //rfc7540,l,3326,3329
}
return (0);
}
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_headers(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
struct req *req;
h2_error h2e;
const uint8_t *p;
size_t l;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
if (r2 == NULL) {
if (h2->rxf_stream <= h2->highest_stream)
return (H2CE_PROTOCOL_ERROR); // rfc7540,l,1153,1158
/* NB: we don't need to guard the read of h2->open_streams
* because headers are handled sequentially so it cannot
* increase under our feet.
*/
if (h2->open_streams >=
h2->local_settings.max_concurrent_streams) {
VSLb(h2->vsl, SLT_Debug,
"H2: stream %u: Hit maximum number of "
"concurrent streams", h2->rxf_stream);
return (H2SE_REFUSED_STREAM); // rfc7540,l,1200,1205
}
h2->highest_stream = h2->rxf_stream;
r2 = h2_new_req(wrk, h2, h2->rxf_stream, NULL);
}
CHECK_OBJ_NOTNULL(r2, H2_REQ_MAGIC);
if (r2->state != H2_S_IDLE)
return (H2CE_PROTOCOL_ERROR); // XXX spec ?
r2->state = H2_S_OPEN;
req = r2->req;
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
req->vsl->wid = VXID_Get(wrk, VSL_CLIENTMARKER);
VSLb(req->vsl, SLT_Begin, "req %u rxreq", VXID(req->sp->vxid));
VSL(SLT_Link, req->sp->vxid, "req %u rxreq", VXID(req->vsl->wid));
h2->new_req = req;
req->sp = h2->sess;
req->transport = &H2_transport;
req->t_first = VTIM_real();
req->t_req = VTIM_real();
req->t_prev = req->t_first;
VSLb_ts_req(req, "Start", req->t_first);
req->acct.req_hdrbytes += h2->rxf_len;
HTTP_Setup(req->http, req->ws, req->vsl, SLT_ReqMethod);
http_SetH(req->http, HTTP_HDR_PROTO, "HTTP/2.0");
h2h_decode_init(h2);
p = h2->rxf_data;
l = h2->rxf_len;
if (h2->rxf_flags & H2FF_HEADERS_PADDED) {
if (*p + 1 > l)
return (H2CE_PROTOCOL_ERROR); // rfc7540,l,1884,1887
l -= 1 + *p;
p += 1;
}
if (h2->rxf_flags & H2FF_HEADERS_PRIORITY) {
if (l < 5)
return (H2CE_PROTOCOL_ERROR);
l -= 5;
p += 5;
}
h2e = h2h_decode_bytes(h2, p, l);
if (h2e != NULL) {
Lck_Lock(&h2->sess->mtx);
VSLb(h2->vsl, SLT_Debug, "HPACK(hdr) %s", h2e->name);
Lck_Unlock(&h2->sess->mtx);
(void)h2h_decode_fini(h2);
AZ(r2->req->ws->r);
h2_del_req(wrk, r2);
return (h2e);
}
if (h2->rxf_flags & H2FF_HEADERS_END_STREAM)
req->req_body_status = REQ_BODY_NONE;
if (h2->rxf_flags & H2FF_HEADERS_END_HEADERS)
return (h2_end_headers(wrk, h2, req, r2));
return (0);
}
/**********************************************************************/
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_continuation(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
struct req *req;
h2_error h2e;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
CHECK_OBJ_ORNULL(r2, H2_REQ_MAGIC);
if (r2 == NULL || r2->state != H2_S_OPEN || r2->req != h2->new_req)
return (H2CE_PROTOCOL_ERROR); // XXX spec ?
req = r2->req;
h2e = h2h_decode_bytes(h2, h2->rxf_data, h2->rxf_len);
r2->req->acct.req_hdrbytes += h2->rxf_len;
if (h2e != NULL) {
Lck_Lock(&h2->sess->mtx);
VSLb(h2->vsl, SLT_Debug, "HPACK(cont) %s", h2e->name);
Lck_Unlock(&h2->sess->mtx);
(void)h2h_decode_fini(h2);
AZ(r2->req->ws->r);
h2_del_req(wrk, r2);
return (h2e);
}
if (h2->rxf_flags & H2FF_HEADERS_END_HEADERS)
return (h2_end_headers(wrk, h2, req, r2));
return (0);
}
/**********************************************************************/
static h2_error v_matchproto_(h2_rxframe_f)
h2_rx_data(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
{
int w1 = 0, w2 = 0;
char buf[4];
unsigned wi;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
ASSERT_RXTHR(h2);
CHECK_OBJ_ORNULL(r2, H2_REQ_MAGIC);
if (r2 == NULL || !r2->scheduled)
return (0);
if (r2->state >= H2_S_CLOS_REM) {
r2->error = H2SE_STREAM_CLOSED;
return (H2SE_STREAM_CLOSED); // rfc7540,l,1766,1769
}
Lck_Lock(&h2->sess->mtx);
while (h2->mailcall != NULL && h2->error == 0 && r2->error == 0)
AZ(Lck_CondWait(h2->cond, &h2->sess->mtx, 0));
if (h2->error || r2->error) {
Lck_Unlock(&h2->sess->mtx);
return (h2->error ? h2->error : r2->error);
}
AZ(h2->mailcall);
h2->mailcall = r2;
h2->req0->r_window -= h2->rxf_len;
r2->r_window -= h2->rxf_len;
// req_bodybytes accounted in CNT code.
if (r2->cond)
AZ(pthread_cond_signal(r2->cond));
while (h2->mailcall != NULL && h2->error == 0 && r2->error == 0)
AZ(Lck_CondWait(h2->cond, &h2->sess->mtx, 0));
wi = cache_param->h2_rx_window_increment;
if (h2->req0->r_window < cache_param->h2_rx_window_low_water) {
h2->req0->r_window += wi;
w1 = 1;
}
if (r2->r_window < cache_param->h2_rx_window_low_water) {
r2->r_window += wi;
w2 = 1;
}
Lck_Unlock(&h2->sess->mtx);
if (w1 || w2) {
vbe32enc(buf, wi);
H2_Send_Get(wrk, h2, h2->req0);
if (w1)
H2_Send_Frame(wrk, h2, H2_F_WINDOW_UPDATE, 0,
4, 0, buf);
if (w2)
H2_Send_Frame(wrk, h2, H2_F_WINDOW_UPDATE, 0,
4, r2->stream, buf);
H2_Send_Rel(h2, h2->req0);
}
return (0);
}
static enum vfp_status v_matchproto_(vfp_pull_f)
h2_vfp_body(struct vfp_ctx *vc, struct vfp_entry *vfe, void *ptr, ssize_t *lp)
{
struct h2_req *r2;
struct h2_sess *h2;
unsigned l;
enum vfp_status retval = VFP_OK;
CHECK_OBJ_NOTNULL(vc, VFP_CTX_MAGIC);
CHECK_OBJ_NOTNULL(vfe, VFP_ENTRY_MAGIC);
CAST_OBJ_NOTNULL(r2, vfe->priv1, H2_REQ_MAGIC);
h2 = r2->h2sess;
AN(ptr);
AN(lp);
l = *lp;
*lp = 0;
Lck_Lock(&h2->sess->mtx);
assert (r2->state == H2_S_OPEN);
r2->cond = &vc->wrk->cond;
while (h2->mailcall != r2 && h2->error == 0 && r2->error == 0)
AZ(Lck_CondWait(r2->cond, &h2->sess->mtx, 0));
r2->cond = NULL;
if (h2->error || r2->error) {
retval = VFP_ERROR;
} else {
assert(h2->mailcall == r2);
if (l > h2->rxf_len)
l = h2->rxf_len;
if (l > 0) {
memcpy(ptr, h2->rxf_data, l);
h2->rxf_data += l;
h2->rxf_len -= l;
}
*lp = l;
if (h2->rxf_len > 0) {
/* We ran out of storage: Have VFP call us
* again with a fresh buffer */
Lck_Unlock(&h2->sess->mtx);
return (VFP_OK);
}
if (h2->rxf_len == 0) {
if (h2->rxf_flags & H2FF_DATA_END_STREAM) {
retval = VFP_END;
r2->state = H2_S_CLOS_REM;
}
}
h2->mailcall = NULL;
AZ(pthread_cond_signal(h2->cond));
}
Lck_Unlock(&h2->sess->mtx);
return (retval);
}
static void
h2_vfp_body_fini(struct vfp_ctx *vc, struct vfp_entry *vfe)
{
struct h2_req *r2;
struct h2_sess *h2;
CHECK_OBJ_NOTNULL(vc, VFP_CTX_MAGIC);
CHECK_OBJ_NOTNULL(vfe, VFP_ENTRY_MAGIC);
CAST_OBJ_NOTNULL(r2, vfe->priv1, H2_REQ_MAGIC);
CHECK_OBJ_NOTNULL(r2->req, REQ_MAGIC);
h2 = r2->h2sess;
if (vc->failed) {
CHECK_OBJ_NOTNULL(r2->req->wrk, WORKER_MAGIC);
H2_Send_Get(r2->req->wrk, h2, r2);
H2_Send_RST(r2->req->wrk, h2, r2, r2->stream,
H2SE_REFUSED_STREAM);
H2_Send_Rel(h2, r2);
Lck_Lock(&h2->sess->mtx);
r2->error = H2SE_REFUSED_STREAM;
if (h2->mailcall == r2) {
h2->mailcall = NULL;
AZ(pthread_cond_signal(h2->cond));
}
Lck_Unlock(&h2->sess->mtx);
}
}
static const struct vfp h2_body = {
.name = "H2_BODY",
.pull = h2_vfp_body,
.fini = h2_vfp_body_fini
};
void v_matchproto_(vtr_req_body_t)
h2_req_body(struct req *req)
{
struct h2_req *r2;
struct vfp_entry *vfe;
CHECK_OBJ(req, REQ_MAGIC);
CAST_OBJ_NOTNULL(r2, req->transport_priv, H2_REQ_MAGIC);
vfe = VFP_Push(req->vfc, &h2_body);
AN(vfe);
vfe->priv1 = r2;
}
/**********************************************************************/
void v_matchproto_(vtr_req_fail_f)
h2_req_fail(struct req *req, enum sess_close reason)
{
assert(reason > 0);
assert(req->sp->fd != 0);
VSLb(req->vsl, SLT_Debug, "H2FAILREQ");
}
/**********************************************************************/
static enum htc_status_e v_matchproto_(htc_complete_f)
h2_frame_complete(struct http_conn *htc)
{
struct h2_sess *h2;
CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
CAST_OBJ_NOTNULL(h2, htc->priv, H2_SESS_MAGIC);
if (htc->rxbuf_b + 9 > htc->rxbuf_e ||
htc->rxbuf_b + 9 + (vbe32dec(htc->rxbuf_b) >> 8) > htc->rxbuf_e)
return (HTC_S_MORE);
return (HTC_S_COMPLETE);
}
/**********************************************************************/
static h2_error
h2_procframe(struct worker *wrk, struct h2_sess *h2, h2_frame h2f)
{
struct h2_req *r2;
h2_error h2e;
ASSERT_RXTHR(h2);
if (h2->rxf_stream == 0 && h2f->act_szero != 0)
return (h2f->act_szero);
if (h2->rxf_stream != 0 && h2f->act_snonzero != 0)
return (h2f->act_snonzero);
if (h2->rxf_stream > h2->highest_stream && h2f->act_sidle != 0)
return (h2f->act_sidle);
if (h2->rxf_stream != 0 && !(h2->rxf_stream & 1)) {
// rfc7540,l,1140,1145
// rfc7540,l,1153,1158
/* No even streams, we don't do PUSH_PROMISE */
Lck_Lock(&h2->sess->mtx);
VSLb(h2->vsl, SLT_Debug, "H2: illegal stream (=%u)",
h2->rxf_stream);
Lck_Unlock(&h2->sess->mtx);
return (H2CE_PROTOCOL_ERROR);
}
VTAILQ_FOREACH(r2, &h2->streams, list)
if (r2->stream == h2->rxf_stream)
break;
if (h2->new_req != NULL &&
!(r2 && h2->new_req == r2->req && h2f == H2_F_CONTINUATION))
return (H2CE_PROTOCOL_ERROR); // rfc7540,l,1859,1863
h2e = h2f->rxfunc(wrk, h2, r2);
if (h2e == 0)
return (0);
if (h2->rxf_stream == 0 || h2e->connection)
return (h2e); // Connection errors one level up
H2_Send_Get(wrk, h2, h2->req0);
H2_Send_RST(wrk, h2, h2->req0, h2->rxf_stream, h2e);
H2_Send_Rel(h2, h2->req0);
return (0);
}
int
h2_stream_tmo(struct h2_sess *h2, const struct h2_req *r2, vtim_real now)
{
int r = 0;
CHECK_OBJ_NOTNULL(h2, H2_SESS_MAGIC);
CHECK_OBJ_NOTNULL(r2, H2_REQ_MAGIC);
Lck_AssertHeld(&h2->sess->mtx);
/* NB: when now is NAN, it means that idle_send_timeout was hit
* on a lock condwait operation.
*/
if (isnan(now))
AN(r2->t_winupd);
if (r2->t_winupd == 0 && r2->t_send == 0)
return (0);
if (isnan(now) || (r2->t_winupd != 0 &&
now - r2->t_winupd > cache_param->idle_send_timeout)) {
VSLb(h2->vsl, SLT_Debug,
"H2: stream %u: Hit idle_send_timeout waiting for"
" WINDOW_UPDATE", r2->stream);
r = 1;
}
if (r == 0 && r2->t_send != 0 &&
now - r2->t_send > cache_param->send_timeout) {
VSLb(h2->vsl, SLT_Debug,
"H2: stream %u: Hit send_timeout", r2->stream);
r = 1;
}
return (r);