GCOV - Varnish Cache


/*-
 * Copyright (c) 2016 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * 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 <ctype.h>
#include <stdio.h>

#include "cache/cache_filter.h"
#include "cache/cache_transport.h"

#include "http2/cache_http2.h"

#include "vct.h"

/**********************************************************************/

struct hpack_static {
        uint8_t                 idx;
        const char *            name;
        const char *            val;
};

static const struct hpack_static hp_static[] = {
#define HPS(I,N,V) [I] = { I, N ":", V },
#include "tbl/vhp_static.h"
        { 0, "\377:", ""}               // Terminator
};

static const struct hpack_static *hp_idx[256];

void
V2D_Init(void)
{
        int i;
#define HPS(I,N,V)                                              \
        i = hp_static[I].name[0];                               \
        if (hp_idx[i] == NULL) hp_idx[i] = &hp_static[I];
#include "tbl/vhp_static.h"
#undef HPS
}

/**********************************************************************/

static int v_matchproto_(vdp_init_f)
h2_init(VRT_CTX, struct vdp_ctx *vdc, void **priv)
{
        struct h2_req *r2;

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        CHECK_OBJ_NOTNULL(vdc, VDP_CTX_MAGIC);
        AN(priv);
        CAST_OBJ_NOTNULL(r2, *priv, H2_REQ_MAGIC);
        (void)r2;
        return (0);
}

static int v_matchproto_(vdp_fini_f)
h2_fini(struct vdp_ctx *vdc, void **priv)
{
        struct h2_req *r2;

        CHECK_OBJ_NOTNULL(vdc, VDP_CTX_MAGIC);
        CHECK_OBJ_NOTNULL(vdc->wrk, WORKER_MAGIC);
        TAKE_OBJ_NOTNULL(r2, priv, H2_REQ_MAGIC);

        if (r2->error)
                return (0);

        if (vdc->retval < 0) {
                r2->error = H2SE_INTERNAL_ERROR; /* XXX: proper error? */
                H2_Send_Get(vdc->wrk, r2->h2sess, r2);
                H2_Send_RST(vdc->wrk, r2->h2sess, r2, r2->stream, r2->error);
                H2_Send_Rel(r2->h2sess, r2);
                return (0);
        }

        H2_Send_Get(vdc->wrk, r2->h2sess, r2);
        H2_Send(vdc->wrk, r2, H2_F_DATA, H2FF_DATA_END_STREAM, 0, "", NULL);
        H2_Send_Rel(r2->h2sess, r2);
        return (0);
}

static int v_matchproto_(vdp_bytes_f)
h2_bytes(struct vdp_ctx *vdc, enum vdp_action act, void **priv,
    const void *ptr, ssize_t len)
{
        struct h2_req *r2;

        CHECK_OBJ_NOTNULL(vdc, VDP_CTX_MAGIC);
        CAST_OBJ_NOTNULL(r2, *priv, H2_REQ_MAGIC);
        (void)act;

        if ((r2->h2sess->error || r2->error))
                return (-1);
        if (len == 0)
                return (0);
        H2_Send_Get(vdc->wrk, r2->h2sess, r2);
        vdc->bytes_done = 0;
        H2_Send(vdc->wrk, r2, H2_F_DATA, H2FF_NONE, len, ptr, &vdc->bytes_done);
        H2_Send_Rel(r2->h2sess, r2);
        return (0);
}

static const struct vdp h2_vdp = {
        .name =         "H2B",
        .init =         h2_init,
        .bytes =        h2_bytes,
        .fini =         h2_fini,
};

static inline size_t
h2_status(uint8_t *p, uint16_t status) {
        size_t l = 1;

        switch (status) {
        case 200: *p = 0x80 |  8; break;
        case 204: *p = 0x80 |  9; break;
        case 206: *p = 0x80 | 10; break;
        case 304: *p = 0x80 | 11; break;
        case 400: *p = 0x80 | 12; break;
        case 404: *p = 0x80 | 13; break;
        case 500: *p = 0x80 | 14; break;
        default:
                *p++ = 0x18;
                *p++ = 0x03;
                l = 2;

                l += snprintf((char*)p, 4, "%03d", status);
                assert(l == 5);
                break;
        }

        return (l);
}

int v_matchproto_(vtr_minimal_response_f)
h2_minimal_response(struct req *req, uint16_t status)
{
        struct h2_req *r2;
        size_t l;
        uint8_t buf[6];

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
        CAST_OBJ_NOTNULL(r2, req->transport_priv, H2_REQ_MAGIC);

        assert(status >= 100);
        assert(status < 1000);

        l = h2_status(buf, status);
        assert(l < sizeof(buf));

        VSLb(req->vsl, SLT_RespProtocol, "HTTP/2.0");
        VSLb(req->vsl, SLT_RespStatus, "%03d", status);
        VSLbs(req->vsl, SLT_RespReason,
              TOSTRAND(http_Status2Reason(status, NULL)));

        if (status >= 400)
                req->err_code = status;

        /* XXX return code checking once H2_Send returns anything but 0 */
        H2_Send_Get(req->wrk, r2->h2sess, r2);
        H2_Send(req->wrk, r2,
            H2_F_HEADERS,
            H2FF_HEADERS_END_HEADERS |
                (status < 200 ? 0 : H2FF_HEADERS_END_STREAM),
            l, buf, NULL);
        H2_Send_Rel(r2->h2sess, r2);
        return (0);
}

static void
h2_enc_len(struct vsb *vsb, unsigned bits, unsigned val, uint8_t b0)
{
        assert(bits < 8);
        unsigned mask = (1U << bits) - 1U;

        if (val >= mask) {
                VSB_putc(vsb, b0 | (uint8_t)mask);
                val -= mask;
                while (val >= 128) {
                        VSB_putc(vsb, 0x80 | ((uint8_t)val & 0x7f));
                        val >>= 7;
                }
        }
        VSB_putc(vsb, (uint8_t)val);
}

/*
 * Hand-crafted-H2-HEADERS-R-Us:
 *
 * This is a handbuilt HEADERS frame for when we run out of workspace
 * during delivery.
 */

static const uint8_t h2_500_resp[] = {
        // :status 500
        0x8e,

        // content-length 0
        0x1f, 0x0d, 0x01, 0x30,

        // server Varnish
        0x1f, 0x27, 0x07, 'V', 'a', 'r', 'n', 'i', 's', 'h',
};

static void
h2_build_headers(struct vsb *resp, struct req *req)
{
        unsigned u, l;
        int i;
        struct http *hp;
        const char *r;
        const struct hpack_static *hps;
        uint8_t buf[6];
        ssize_t sz, sz1;

        assert(req->resp->status % 1000 >= 100);
        l = h2_status(buf, req->resp->status % 1000);
        VSB_bcat(resp, buf, l);

        hp = req->resp;
        for (u = HTTP_HDR_FIRST; u < hp->nhd && !VSB_error(resp); u++) {
                r = strchr(hp->hd[u].b, ':');
                AN(r);

                if (http_IsFiltered(hp, u, HTTPH_C_SPECIFIC))
                        continue; //rfc7540,l,2999,3006

                hps = hp_idx[tolower(*hp->hd[u].b)];
                sz = 1 + r - hp->hd[u].b;
                assert(sz > 0);
                while (hps != NULL && hps->idx > 0) {
                        i = strncasecmp(hps->name, hp->hd[u].b, sz);
                        if (i < 0) {
                                hps++;
                                continue;
                        }
                        if (i > 0)
                                hps = NULL;
                        break;
                }
                if (hps != NULL) {
                        VSLb(req->vsl, SLT_Debug,
                            "HP {%d, \"%s\", \"%s\"} <%s>",
                            hps->idx, hps->name, hps->val, hp->hd[u].b);
                        h2_enc_len(resp, 4, hps->idx, 0x10);
                } else {
                        VSB_putc(resp, 0x10);
                        sz--;
                        h2_enc_len(resp, 7, sz, 0);
                        for (sz1 = 0; sz1 < sz; sz1++)
                                VSB_putc(resp, tolower(hp->hd[u].b[sz1]));

                }

                while (vct_islws(*++r))
                        continue;
                sz = hp->hd[u].e - r;
                h2_enc_len(resp, 7, sz, 0);
                VSB_bcat(resp, r, sz);
        }
}

enum vtr_deliver_e v_matchproto_(vtr_deliver_f)
h2_deliver(struct req *req, int sendbody)
{
        size_t sz;
        const char *r;
        struct sess *sp;
        struct h2_req *r2;
        struct vsb resp[1];
        struct vrt_ctx ctx[1];
        uintptr_t ss;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
        CHECK_OBJ_NOTNULL(req->objcore, OBJCORE_MAGIC);
        CAST_OBJ_NOTNULL(r2, req->transport_priv, H2_REQ_MAGIC);
        sp = req->sp;
        CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);

        VSLb(req->vsl, SLT_RespProtocol, "HTTP/2.0");

        (void)http_DoConnection(req->resp, SC_RESP_CLOSE);

        ss = WS_Snapshot(req->ws);

        WS_VSB_new(resp, req->ws);
        h2_build_headers(resp, req);
        r = WS_VSB_finish(resp, req->ws, &sz);

        if (r == NULL) {
                VSLb(req->vsl, SLT_Error, "workspace_client overflow");
                VSLb(req->vsl, SLT_RespStatus, "500");
                VSLb(req->vsl, SLT_RespReason, "Internal Server Error");
                req->wrk->stats->client_resp_500++;

                r = (const char*)h2_500_resp;
                sz = sizeof h2_500_resp;
                sendbody = 0;
        }

        r2->t_send = req->t_prev;

        H2_Send_Get(req->wrk, r2->h2sess, r2);
        H2_Send(req->wrk, r2, H2_F_HEADERS,
            (sendbody ? 0 : H2FF_HEADERS_END_STREAM) | H2FF_HEADERS_END_HEADERS,
            sz, r, &req->acct.resp_hdrbytes);
        H2_Send_Rel(r2->h2sess, r2);

        WS_Reset(req->ws, ss);

        /* XXX someone into H2 please add appropriate error handling */
        if (sendbody) {
                INIT_OBJ(ctx, VRT_CTX_MAGIC);
                VCL_Req2Ctx(ctx, req);
                if (! VDP_Push(ctx, req->vdc, req->ws, &h2_vdp, r2))
                        (void)VDP_DeliverObj(req->vdc, req->objcore);
        }

        req->acct.resp_bodybytes += VDP_Close(req->vdc, req->objcore, req->boc);
        return (VTR_D_DONE);
}

		varnish-cache/bin/varnishd/http2/cache_http2_deliver.c
0		/*-
1		* Copyright (c) 2016 Varnish Software AS
2		* All rights reserved.
3		*
4		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
5		*
6		* SPDX-License-Identifier: BSD-2-Clause
7		*
8		* Redistribution and use in source and binary forms, with or without
9		* modification, are permitted provided that the following conditions
10	37144	* are met:
11	0	* 1. Redistributions of source code must retain the above copyright
12	0	* notice, this list of conditions and the following disclaimer.
13	0	* 2. Redistributions in binary form must reproduce the above copyright
14	0	* notice, this list of conditions and the following disclaimer in the
15	0	* documentation and/or other materials provided with the distribution.
16	0	*
17	0	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18	0	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19	0	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20	0	* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21	0	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22	0	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23	0	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24	37144	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25	0	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26	0	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27	0	* SUCH DAMAGE.
28	0	*
29	0	*/
30	0
31	0	#include "config.h"
32	0
33	37144	#include "cache/cache_varnishd.h"
34	0
35	0	#include <ctype.h>
36	0	#include <stdio.h>
37	0
38	0	#include "cache/cache_filter.h"
39	0	#include "cache/cache_transport.h"
40	0
41	0	#include "http2/cache_http2.h"
42	37144
43	37144	#include "vct.h"
44	0
45	0	/**********************************************************************/
46	37144
47	37144	struct hpack_static {
48	37144	uint8_t idx;
49	0	const char * name;
50	0	const char * val;
51	0	};
52	0
53	37144	static const struct hpack_static hp_static[] = {
54	0	#define HPS(I,N,V) [I] = { I, N ":", V },
55	0	#include "tbl/vhp_static.h"
56	37144	{ 0, "\377:", ""} // Terminator
57	37144	};
58	0
59	37144	static const struct hpack_static *hp_idx[256];
60	0
61	0	void
62	37144	V2D_Init(void)
63	37144	{
64	0	int i;
65	0	#define HPS(I,N,V) \
66	37144	i = hp_static[I].name[0]; \
67	37144	if (hp_idx[i] == NULL) hp_idx[i] = &hp_static[I];
68	37144	#include "tbl/vhp_static.h"
69	0	#undef HPS
70	37144	}
71
72		/**********************************************************************/
73
74		static int v_matchproto_(vdp_init_f)
75	1520	h2_init(VRT_CTX, struct vdp_ctx vdc, void *priv)
76		{
77		struct h2_req *r2;
78
79	1520	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
80	1520	CHECK_OBJ_NOTNULL(vdc, VDP_CTX_MAGIC);
81	1520	AN(priv);
82	1520	CAST_OBJ_NOTNULL(r2, *priv, H2_REQ_MAGIC);
83	1520	(void)r2;
84	1520	return (0);
85		}
86
87		static int v_matchproto_(vdp_fini_f)
88	1520	h2_fini(struct vdp_ctx vdc, void *priv)
89		{
90		struct h2_req *r2;
91
92	1520	CHECK_OBJ_NOTNULL(vdc, VDP_CTX_MAGIC);
93	1520	CHECK_OBJ_NOTNULL(vdc->wrk, WORKER_MAGIC);
94	1520	TAKE_OBJ_NOTNULL(r2, priv, H2_REQ_MAGIC);
95
96	1520	if (r2->error)
97	313	return (0);
98
99	1207	if (vdc->retval < 0) {
100	61	r2->error = H2SE_INTERNAL_ERROR; /* XXX: proper error? */
101	61	H2_Send_Get(vdc->wrk, r2->h2sess, r2);
102	61	H2_Send_RST(vdc->wrk, r2->h2sess, r2, r2->stream, r2->error);
103	61	H2_Send_Rel(r2->h2sess, r2);
104	61	return (0);
105		}
106
107	1146	H2_Send_Get(vdc->wrk, r2->h2sess, r2);
108	1146	H2_Send(vdc->wrk, r2, H2_F_DATA, H2FF_DATA_END_STREAM, 0, "", NULL);
109	1146	H2_Send_Rel(r2->h2sess, r2);
110	1146	return (0);
111	1520	}
112
113		static int v_matchproto_(vdp_bytes_f)
114	2480	h2_bytes(struct vdp_ctx vdc, enum vdp_action act, void *priv,
115		const void *ptr, ssize_t len)
116		{
117		struct h2_req *r2;
118
119	2480	CHECK_OBJ_NOTNULL(vdc, VDP_CTX_MAGIC);
120	2480	CAST_OBJ_NOTNULL(r2, *priv, H2_REQ_MAGIC);
121	2480	(void)act;
122
123	2480	if ((r2->h2sess->error \|\| r2->error))
124	254	return (-1);
125	2226	if (len == 0)
126	760	return (0);
127	1466	H2_Send_Get(vdc->wrk, r2->h2sess, r2);
128	1466	vdc->bytes_done = 0;
129	1466	H2_Send(vdc->wrk, r2, H2_F_DATA, H2FF_NONE, len, ptr, &vdc->bytes_done);
130	1466	H2_Send_Rel(r2->h2sess, r2);
131	1466	return (0);
132	2480	}
133
134		static const struct vdp h2_vdp = {
135		.name = "H2B",
136		.init = h2_init,
137		.bytes = h2_bytes,
138		.fini = h2_fini,
139		};
140
141		static inline size_t
142	5397	h2_status(uint8_t *p, uint16_t status) {
143	5397	size_t l = 1;
144
145	5397	switch (status) {
146	3798	case 200: *p = 0x80 \| 8; break;
147	0	case 204: *p = 0x80 \| 9; break;
148	80	case 206: *p = 0x80 \| 10; break;
149	120	case 304: *p = 0x80 \| 11; break;
150	40	case 400: *p = 0x80 \| 12; break;
151	40	case 404: *p = 0x80 \| 13; break;
152	40	case 500: *p = 0x80 \| 14; break;
153		default:
154	1279	*p++ = 0x18;
155	1279	*p++ = 0x03;
156	1279	l = 2;
157
158	1279	l += snprintf((char*)p, 4, "%03d", status);
159	1279	assert(l == 5);
160	1279	break;
161		}
162
163	5397	return (l);
164		}
165
166		int v_matchproto_(vtr_minimal_response_f)
167	1040	h2_minimal_response(struct req *req, uint16_t status)
168		{
169		struct h2_req *r2;
170		size_t l;
171		uint8_t buf[6];
172
173	1040	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
174	1040	CAST_OBJ_NOTNULL(r2, req->transport_priv, H2_REQ_MAGIC);
175
176	1040	assert(status >= 100);
177	1040	assert(status < 1000);
178
179	1040	l = h2_status(buf, status);
180	1040	assert(l < sizeof(buf));
181
182	1040	VSLb(req->vsl, SLT_RespProtocol, "HTTP/2.0");
183	1040	VSLb(req->vsl, SLT_RespStatus, "%03d", status);
184	2080	VSLbs(req->vsl, SLT_RespReason,
185	1040	TOSTRAND(http_Status2Reason(status, NULL)));
186
187	1040	if (status >= 400)
188	960	req->err_code = status;
189
190		/* XXX return code checking once H2_Send returns anything but 0 */
191	1040	H2_Send_Get(req->wrk, r2->h2sess, r2);
192	2080	H2_Send(req->wrk, r2,
193		H2_F_HEADERS,
194	2080	H2FF_HEADERS_END_HEADERS \|
195	1040	(status < 200 ? 0 : H2FF_HEADERS_END_STREAM),
196	1040	l, buf, NULL);
197	1040	H2_Send_Rel(r2->h2sess, r2);
198	1040	return (0);
199		}
200
201		static void
202	66936	h2_enc_len(struct vsb *vsb, unsigned bits, unsigned val, uint8_t b0)
203		{
204	66936	assert(bits < 8);
205	66936	unsigned mask = (1U << bits) - 1U;
206
207	66936	if (val >= mask) {
208	25158	VSB_putc(vsb, b0 \| (uint8_t)mask);
209	25158	val -= mask;
210	25358	while (val >= 128) {
211	200	VSB_putc(vsb, 0x80 \| ((uint8_t)val & 0x7f));
212	200	val >>= 7;
213		}
214	25158	}
215	66936	VSB_putc(vsb, (uint8_t)val);
216	66936	}
217
218		/*
219		* Hand-crafted-H2-HEADERS-R-Us:
220		*
221		* This is a handbuilt HEADERS frame for when we run out of workspace
222		* during delivery.
223		*/
224
225		static const uint8_t h2_500_resp[] = {
226		// :status 500
227		0x8e,
228
229		// content-length 0
230		0x1f, 0x0d, 0x01, 0x30,
231
232		// server Varnish
233		0x1f, 0x27, 0x07, 'V', 'a', 'r', 'n', 'i', 's', 'h',
234		};
235
236		static void
237	4358	h2_build_headers(struct vsb resp, struct req req)
238		{
239		unsigned u, l;
240		int i;
241		struct http *hp;
242		const char *r;
243		const struct hpack_static *hps;
244		uint8_t buf[6];
245		ssize_t sz, sz1;
246
247	4358	assert(req->resp->status % 1000 >= 100);
248	4358	l = h2_status(buf, req->resp->status % 1000);
249	4358	VSB_bcat(resp, buf, l);
250
251	4358	hp = req->resp;
252	37948	for (u = HTTP_HDR_FIRST; u < hp->nhd && !VSB_error(resp); u++) {
253	33590	r = strchr(hp->hd[u].b, ':');
254	33590	AN(r);
255
256	33590	if (http_IsFiltered(hp, u, HTTPH_C_SPECIFIC))
257	120	continue; //rfc7540,l,2999,3006
258
259	33470	hps = hp_idx[tolower(*hp->hd[u].b)];
260	33470	sz = 1 + r - hp->hd[u].b;
261	33470	assert(sz > 0);
262	103012	while (hps != NULL && hps->idx > 0) {
263	98253	i = strncasecmp(hps->name, hp->hd[u].b, sz);
264	98253	if (i < 0) {
265	69542	hps++;
266	69542	continue;
267		}
268	28711	if (i > 0)
269	3760	hps = NULL;
270	28711	break;
271		}
272	33470	if (hps != NULL) {
273	49902	VSLb(req->vsl, SLT_Debug,
274		"HP {%d, \"%s\", \"%s\"} <%s>",
275	24951	hps->idx, hps->name, hps->val, hp->hd[u].b);
276	24951	h2_enc_len(resp, 4, hps->idx, 0x10);
277	24951	} else {
278	8519	VSB_putc(resp, 0x10);
279	8519	sz--;
280	8519	h2_enc_len(resp, 7, sz, 0);
281	84058	for (sz1 = 0; sz1 < sz; sz1++)
282	75539	VSB_putc(resp, tolower(hp->hd[u].b[sz1]));
283
284		}
285
286	66943	while (vct_islws(*++r))
287	33473	continue;
288	33470	sz = hp->hd[u].e - r;
289	33470	h2_enc_len(resp, 7, sz, 0);
290	33470	VSB_bcat(resp, r, sz);
291	33470	}
292	4358	}
293
294		enum vtr_deliver_e v_matchproto_(vtr_deliver_f)
295	4360	h2_deliver(struct req *req, int sendbody)
296		{
297		size_t sz;
298		const char *r;
299		struct sess *sp;
300		struct h2_req *r2;
301		struct vsb resp[1];
302		struct vrt_ctx ctx[1];
303		uintptr_t ss;
304
305	4360	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
306	4360	CHECK_OBJ_NOTNULL(req->objcore, OBJCORE_MAGIC);
307	4360	CAST_OBJ_NOTNULL(r2, req->transport_priv, H2_REQ_MAGIC);
308	4360	sp = req->sp;
309	4360	CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
310
311	4360	VSLb(req->vsl, SLT_RespProtocol, "HTTP/2.0");
312
313	4360	(void)http_DoConnection(req->resp, SC_RESP_CLOSE);
314
315	4360	ss = WS_Snapshot(req->ws);
316
317	4360	WS_VSB_new(resp, req->ws);
318	4360	h2_build_headers(resp, req);
319	4360	r = WS_VSB_finish(resp, req->ws, &sz);
320
321	4360	if (r == NULL) {
322	40	VSLb(req->vsl, SLT_Error, "workspace_client overflow");
323	40	VSLb(req->vsl, SLT_RespStatus, "500");
324	40	VSLb(req->vsl, SLT_RespReason, "Internal Server Error");
325	40	req->wrk->stats->client_resp_500++;
326
327	40	r = (const char*)h2_500_resp;
328	40	sz = sizeof h2_500_resp;
329	40	sendbody = 0;
330	40	}
331
332	4360	r2->t_send = req->t_prev;
333
334	4360	H2_Send_Get(req->wrk, r2->h2sess, r2);
335	8720	H2_Send(req->wrk, r2, H2_F_HEADERS,
336	4360	(sendbody ? 0 : H2FF_HEADERS_END_STREAM) \| H2FF_HEADERS_END_HEADERS,
337	4360	sz, r, &req->acct.resp_hdrbytes);
338	4360	H2_Send_Rel(r2->h2sess, r2);
339
340	4360	WS_Reset(req->ws, ss);
341
342		/* XXX someone into H2 please add appropriate error handling */
343	4360	if (sendbody) {
344	1520	INIT_OBJ(ctx, VRT_CTX_MAGIC);
345	1520	VCL_Req2Ctx(ctx, req);
346	1520	if (! VDP_Push(ctx, req->vdc, req->ws, &h2_vdp, r2))
347	1520	(void)VDP_DeliverObj(req->vdc, req->objcore);
348	1520	}
349
350	4360	req->acct.resp_bodybytes += VDP_Close(req->vdc, req->objcore, req->boc);
351	4360	return (VTR_D_DONE);
352		}