GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2015 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.
 *
 * HTTP protocol requests
 *
 * The trouble with the "until magic sequence" design of HTTP protocol messages
 * is that either you have to read a single character at a time, which is
 * inefficient, or you risk reading too much, and pre-read some of the object,
 * or even the next pipelined request, which follows the one you want.
 *
 * HTC reads a HTTP protocol header into a workspace, subject to limits,
 * and stops when we see the magic marker (double [CR]NL), and if we overshoot,
 * it keeps track of the "pipelined" data.
 *
 * We use this both for client and backend connections.
 */

#include "config.h"

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

#include "cache_http1.h"

#include "vct.h"

const int HTTP1_Req[3] = {
        HTTP_HDR_METHOD, HTTP_HDR_URL, HTTP_HDR_PROTO
};

const int HTTP1_Resp[3] = {
        HTTP_HDR_PROTO, HTTP_HDR_STATUS, HTTP_HDR_REASON
};

/*--------------------------------------------------------------------
 * Check if we have a complete HTTP request or response yet
 */

enum htc_status_e v_matchproto_(htc_complete_f)
HTTP1_Complete(struct http_conn *htc)
{
        char *p;
        enum htc_status_e retval;

        CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
        AN(WS_Reservation(htc->ws));
        assert(pdiff(htc->rxbuf_b, htc->rxbuf_e) <= WS_ReservationSize(htc->ws));

        /* Skip any leading white space */
        for (p = htc->rxbuf_b ; p < htc->rxbuf_e && vct_islws(*p); p++)
                continue;
        if (p == htc->rxbuf_e)
                return (HTC_S_EMPTY);

        /* Do not return a partial H2 connection preface */
        retval = H2_prism_complete(htc);
        if (retval != HTC_S_JUNK)
                return (retval);

        /*
         * Here we just look for NL[CR]NL to see that reception
         * is completed.  More stringent validation happens later.
         */
        while (1) {
                p = memchr(p, '\n', htc->rxbuf_e - p);
                if (p == NULL)
                        return (HTC_S_MORE);
                if (++p == htc->rxbuf_e)
                        return (HTC_S_MORE);
                if (*p == '\r' && ++p == htc->rxbuf_e)
                        return (HTC_S_MORE);
                if (*p == '\n')
                        break;
        }
        return (HTC_S_COMPLETE);
}

/*--------------------------------------------------------------------
 * Dissect the headers of the HTTP protocol message.
 * Detect conditionals (headers which start with '^[Ii][Ff]-')
 */

static uint16_t
http1_dissect_hdrs(struct http *hp, char *p, struct http_conn *htc,
    unsigned maxhdr)
{
        char *q, *r, *s;
        int i;

        assert(p > htc->rxbuf_b);
        assert(p <= htc->rxbuf_e);
        hp->nhd = HTTP_HDR_FIRST;
        r = NULL;               /* For FlexeLint */
        for (; p < htc->rxbuf_e; p = r) {

                /* Find end of next header */
                q = r = p;
                if (vct_iscrlf(p, htc->rxbuf_e))
                        break;
                while (r < htc->rxbuf_e) {
                        if (vct_ishdrval(*r)) {
                                r++;
                                continue;
                        }
                        i = vct_iscrlf(r, htc->rxbuf_e);
                        if (i == 0) {
                                VSLb(hp->vsl, SLT_BogoHeader,
                                    "Header has ctrl char 0x%02x", *r);
                                return (400);
                        }
                        q = r;
                        r += i;
                        assert(r <= htc->rxbuf_e);
                        if (r == htc->rxbuf_e)
                                break;
                        if (vct_iscrlf(r, htc->rxbuf_e))
                                break;
                        /* If line does not continue: got it. */
                        if (!vct_issp(*r))
                                break;

                        /* Clear line continuation LWS to spaces */
                        while (q < r)
                                *q++ = ' ';
                        while (q < htc->rxbuf_e && vct_issp(*q))
                                *q++ = ' ';
                }

                /* Empty header = end of headers */
                if (p == q)
                        break;

                if (q - p > maxhdr) {
                        VSLb(hp->vsl, SLT_BogoHeader, "Header too long: %.*s",
                            (int)(q - p > 20 ? 20 : q - p), p);
                        return (400);
                }

                if (vct_islws(*p)) {
                        VSLb(hp->vsl, SLT_BogoHeader,
                            "1st header has white space: %.*s",
                            (int)(q - p > 20 ? 20 : q - p), p);
                        return (400);
                }

                if (*p == ':') {
                        VSLb(hp->vsl, SLT_BogoHeader,
                            "Missing header name: %.*s",
                            (int)(q - p > 20 ? 20 : q - p), p);
                        return (400);
                }

                while (q > p && vct_issp(q[-1]))
                        q--;
                *q = '\0';

                for (s = p; *s != ':' && s < q; s++) {
                        if (!vct_istchar(*s)) {
                                VSLb(hp->vsl, SLT_BogoHeader,
                                    "Illegal char 0x%02x in header name", *s);
                                return (400);
                        }
                }
                if (*s != ':') {
                        VSLb(hp->vsl, SLT_BogoHeader, "Header without ':' %.*s",
                            (int)(q - p > 20 ? 20 : q - p), p);
                        return (400);
                }

                if (hp->nhd < hp->shd) {
                        hp->hdf[hp->nhd] = 0;
                        hp->hd[hp->nhd].b = p;
                        hp->hd[hp->nhd].e = q;
                        hp->nhd++;
                } else {
                        VSLb(hp->vsl, SLT_BogoHeader, "Too many headers: %.*s",
                            (int)(q - p > 20 ? 20 : q - p), p);
                        return (400);
                }
        }
        i = vct_iscrlf(p, htc->rxbuf_e);
        assert(i > 0);          /* HTTP1_Complete guarantees this */
        p += i;
        HTC_RxPipeline(htc, p);
        htc->rxbuf_e = p;
        return (0);
}

/*--------------------------------------------------------------------
 * Deal with first line of HTTP protocol message.
 */

static uint16_t
http1_splitline(struct http *hp, struct http_conn *htc, const int *hf,
    unsigned maxhdr)
{
        char *p, *q;
        int i;

        assert(hf == HTTP1_Req || hf == HTTP1_Resp);
        CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
        CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
        assert(htc->rxbuf_e >= htc->rxbuf_b);

        AZ(hp->hd[hf[0]].b);
        AZ(hp->hd[hf[1]].b);
        AZ(hp->hd[hf[2]].b);

        /* Skip leading LWS */
        for (p = htc->rxbuf_b ; vct_islws(*p); p++)
                continue;
        hp->hd[hf[0]].b = p;

        /* First field cannot contain SP or CTL */
        for (; !vct_issp(*p); p++) {
                if (vct_isctl(*p))
                        return (400);
        }
        hp->hd[hf[0]].e = p;
        assert(Tlen(hp->hd[hf[0]]));
        *p++ = '\0';

        /* Skip SP */
        for (; vct_issp(*p); p++) {
                if (vct_isctl(*p))
                        return (400);
        }
        hp->hd[hf[1]].b = p;

        /* Second field cannot contain LWS or CTL */
        for (; !vct_islws(*p); p++) {
                if (vct_isctl(*p))
                        return (400);
        }
        hp->hd[hf[1]].e = p;
        if (!Tlen(hp->hd[hf[1]]))
                return (400);

        /* Skip SP */
        q = p;
        for (; vct_issp(*p); p++) {
                if (vct_isctl(*p))
                        return (400);
        }
        if (q < p)
                *q = '\0';      /* Nul guard for the 2nd field. If q == p
                                 * (the third optional field is not
                                 * present), the last nul guard will
                                 * cover this field. */

        /* Third field is optional and cannot contain CTL except TAB */
        q = p;
        for (; p < htc->rxbuf_e && !vct_iscrlf(p, htc->rxbuf_e); p++) {
                if (vct_isctl(*p) && !vct_issp(*p))
                        return (400);
        }
        if (p > q) {
                hp->hd[hf[2]].b = q;
                hp->hd[hf[2]].e = p;
        }

        /* Skip CRLF */
        i = vct_iscrlf(p, htc->rxbuf_e);
        if (!i)
                return (400);
        *p = '\0';
        p += i;

        http_Proto(hp);

        return (http1_dissect_hdrs(hp, p, htc, maxhdr));
}

/*--------------------------------------------------------------------*/

static body_status_t
http1_body_status(const struct http *hp, struct http_conn *htc, int request)
{
        ssize_t cl;
        const char *b;

        CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
        CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);

        htc->content_length = -1;

        cl = http_GetContentLength(hp);
        if (cl == -2)
                return (BS_ERROR);
        if (http_GetHdr(hp, H_Transfer_Encoding, &b)) {
                if (!http_coding_eq(b, chunked))
                        return (BS_ERROR);
                if (cl != -1) {
                        /*
                         * RFC7230 3.3.3 allows more lenient handling
                         * but we're going to be strict.
                         */
                        return (BS_ERROR);
                }
                return (BS_CHUNKED);
        }
        if (cl >= 0) {
                htc->content_length = cl;
                return (cl == 0 ? BS_NONE : BS_LENGTH);
        }

        if (hp->protover == 11 && request)
                return (BS_NONE);

        if (http_HdrIs(hp, H_Connection, "keep-alive")) {
                /*
                 * Keep alive with neither TE=Chunked or C-Len is impossible.
                 * We assume a zero length body.
                 */
                return (BS_NONE);
        }

        /*
         * Fall back to EOF transfer.
         */
        return (BS_EOF);
}

/*--------------------------------------------------------------------*/

uint16_t
HTTP1_DissectRequest(struct http_conn *htc, struct http *hp)
{
        uint16_t retval;
        const char *p;
        const char *b = NULL, *e;

        CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
        CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);

        retval = http1_splitline(hp, htc,
            HTTP1_Req, cache_param->http_req_hdr_len);
        if (retval != 0)
                return (retval);

        if (hp->protover < 10 || hp->protover > 11)
                return (400);

        /* RFC2616, section 5.2, point 1 */
        if (http_scheme_at(hp->hd[HTTP_HDR_URL].b, http))
                b = hp->hd[HTTP_HDR_URL].b + 7;
        else if (FEATURE(FEATURE_HTTPS_SCHEME) &&
            http_scheme_at(hp->hd[HTTP_HDR_URL].b, https))
                b = hp->hd[HTTP_HDR_URL].b + 8;
        if (b) {
                e = strchr(b, '/');
                if (e) {
                        http_Unset(hp, H_Host);
                        http_PrintfHeader(hp, "Host: %.*s", (int)(e - b), b);
                        hp->hd[HTTP_HDR_URL].b = e;
                }
        }

        htc->body_status = http1_body_status(hp, htc, 1);
        if (htc->body_status == BS_ERROR)
                return (400);

        p = http_GetMethod(hp);
        AN(p);

        if (htc->body_status == BS_EOF) {
                assert(hp->protover == 10);
                /* RFC1945 8.3 p32 and D.1.1 p58 */
                if (http_method_eq(p, POST) || http_method_eq(p, PUT))
                        return (400);
                htc->body_status = BS_NONE;
        }

        /* HEAD with a body is a hard error */
        if (htc->body_status != BS_NONE && http_method_eq(p, HEAD))
                return (400);

        return (retval);
}

/*--------------------------------------------------------------------*/

uint16_t
HTTP1_DissectResponse(struct http_conn *htc, struct http *hp,
    const struct http *rhttp)
{
        uint16_t retval = 0;
        const char *p;

        CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
        CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
        CHECK_OBJ_NOTNULL(rhttp, HTTP_MAGIC);

        if (http1_splitline(hp, htc,
            HTTP1_Resp, cache_param->http_resp_hdr_len))
                retval = 503;

        if (retval == 0 && hp->protover < 10)
                retval = 503;

        if (retval == 0 && hp->protover > rhttp->protover)
                http_SetH(hp, HTTP_HDR_PROTO, rhttp->hd[HTTP_HDR_PROTO].b);

        if (retval == 0 && Tlen(hp->hd[HTTP_HDR_STATUS]) != 3)
                retval = 503;

        if (retval == 0) {
                p = hp->hd[HTTP_HDR_STATUS].b;

                if (p[0] >= '1' && p[0] <= '9' &&
                    p[1] >= '0' && p[1] <= '9' &&
                    p[2] >= '0' && p[2] <= '9')
                        hp->status =
                            100 * (p[0] - '0') + 10 * (p[1] - '0') + p[2] - '0';
                else
                        retval = 503;
        }

        if (retval != 0) {
                VSLb(hp->vsl, SLT_HttpGarbage, "%.*s",
                    (int)(htc->rxbuf_e - htc->rxbuf_b), htc->rxbuf_b);
                assert(retval >= 100 && retval <= 999);
                assert(retval == 503);
                http_SetStatus(hp, 503, NULL);
        }

        if (hp->hd[HTTP_HDR_REASON].b == NULL ||
            !Tlen(hp->hd[HTTP_HDR_REASON])) {
                http_SetH(hp, HTTP_HDR_REASON,
                    http_Status2Reason(hp->status, NULL));
        }

        htc->body_status = http1_body_status(hp, htc, 0);

        return (retval);
}

/*--------------------------------------------------------------------*/

static unsigned
http1_WrTxt(const struct worker *wrk, const txt *hh, const char *suf)
{
        unsigned u;

        CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
        AN(wrk);
        AN(hh);
        AN(hh->b);
        AN(hh->e);
        u = V1L_Write(wrk, hh->b, hh->e - hh->b);
        if (suf != NULL)
                u += V1L_Write(wrk, suf, -1);
        return (u);
}

unsigned
HTTP1_Write(const struct worker *w, const struct http *hp, const int *hf)
{
        unsigned u, l;

        assert(hf == HTTP1_Req || hf == HTTP1_Resp);
        AN(hp->hd[hf[0]].b);
        AN(hp->hd[hf[1]].b);
        AN(hp->hd[hf[2]].b);
        l = http1_WrTxt(w, &hp->hd[hf[0]], " ");
        l += http1_WrTxt(w, &hp->hd[hf[1]], " ");
        l += http1_WrTxt(w, &hp->hd[hf[2]], "\r\n");

        for (u = HTTP_HDR_FIRST; u < hp->nhd; u++)
                l += http1_WrTxt(w, &hp->hd[u], "\r\n");
        l += V1L_Write(w, "\r\n", -1);
        return (l);
}

		varnish-cache/bin/varnishd/http1/cache_http1_proto.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2015 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*
30		* HTTP protocol requests
31		*
32		* The trouble with the "until magic sequence" design of HTTP protocol messages
33		* is that either you have to read a single character at a time, which is
34		* inefficient, or you risk reading too much, and pre-read some of the object,
35		* or even the next pipelined request, which follows the one you want.
36		*
37		* HTC reads a HTTP protocol header into a workspace, subject to limits,
38		* and stops when we see the magic marker (double [CR]NL), and if we overshoot,
39		* it keeps track of the "pipelined" data.
40		*
41		* We use this both for client and backend connections.
42		*/
43
44		#include "config.h"
45
46		#include "cache/cache_varnishd.h"
47		#include "cache/cache_transport.h"
48
49		#include "cache_http1.h"
50
51		#include "vct.h"
52
53		const int HTTP1_Req[3] = {
54		HTTP_HDR_METHOD, HTTP_HDR_URL, HTTP_HDR_PROTO
55		};
56
57		const int HTTP1_Resp[3] = {
58		HTTP_HDR_PROTO, HTTP_HDR_STATUS, HTTP_HDR_REASON
59		};
60
61		/*--------------------------------------------------------------------
62		* Check if we have a complete HTTP request or response yet
63		*/
64
65		enum htc_status_e v_matchproto_(htc_complete_f)
66	501935	HTTP1_Complete(struct http_conn *htc)
67		{
68		char *p;
69		enum htc_status_e retval;
70
71	501935	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
72	501935	AN(WS_Reservation(htc->ws));
73	501935	assert(pdiff(htc->rxbuf_b, htc->rxbuf_e) <= WS_ReservationSize(htc->ws));
74
75		/* Skip any leading white space */
76	503415	for (p = htc->rxbuf_b ; p < htc->rxbuf_e && vct_islws(*p); p++)
77	1480	continue;
78	501935	if (p == htc->rxbuf_e)
79	273170	return (HTC_S_EMPTY);
80
81		/* Do not return a partial H2 connection preface */
82	228765	retval = H2_prism_complete(htc);
83	228765	if (retval != HTC_S_JUNK)
84	10959	return (retval);
85
86		/*
87		* Here we just look for NL[CR]NL to see that reception
88		* is completed. More stringent validation happens later.
89		*/
90	786889	while (1) {
91	786889	p = memchr(p, '\n', htc->rxbuf_e - p);
92	786889	if (p == NULL)
93	12027	return (HTC_S_MORE);
94	774862	if (++p == htc->rxbuf_e)
95	885	return (HTC_S_MORE);
96	773977	if (*p == '\r' && ++p == htc->rxbuf_e)
97	80	return (HTC_S_MORE);
98	773897	if (*p == '\n')
99	204814	break;
100		}
101	204814	return (HTC_S_COMPLETE);
102	501935	}
103
104		/*--------------------------------------------------------------------
105		* Dissect the headers of the HTTP protocol message.
106		* Detect conditionals (headers which start with '^[Ii][Ff]-')
107		*/
108
109		static uint16_t
110	204843	http1_dissect_hdrs(struct http hp, char p, struct http_conn *htc,
111		unsigned maxhdr)
112		{
113		char q, r, *s;
114		int i;
115
116	204843	assert(p > htc->rxbuf_b);
117	204843	assert(p <= htc->rxbuf_e);
118	204843	hp->nhd = HTTP_HDR_FIRST;
119	204843	r = NULL; /* For FlexeLint */
120	764712	for (; p < htc->rxbuf_e; p = r) {
121
122		/* Find end of next header */
123	764710	q = r = p;
124	764710	if (vct_iscrlf(p, htc->rxbuf_e))
125	203879	break;
126	11907280	while (r < htc->rxbuf_e) {
127	11907242	if (vct_ishdrval(*r)) {
128	11346311	r++;
129	11346311	continue;
130		}
131	560931	i = vct_iscrlf(r, htc->rxbuf_e);
132	560931	if (i == 0) {
133	320	VSLb(hp->vsl, SLT_BogoHeader,
134	160	"Header has ctrl char 0x%02x", *r);
135	160	return (400);
136		}
137	560771	q = r;
138	560771	r += i;
139	560771	assert(r <= htc->rxbuf_e);
140	560771	if (r == htc->rxbuf_e)
141	0	break;
142	560771	if (vct_iscrlf(r, htc->rxbuf_e))
143	203580	break;
144		/* If line does not continue: got it. */
145	357191	if (!vct_issp(*r))
146	356831	break;
147
148		/* Clear line continuation LWS to spaces */
149	720	while (q < r)
150	360	*q++ = ' ';
151	760	while (q < htc->rxbuf_e && vct_issp(*q))
152	400	*q++ = ' ';
153		}
154
155		/* Empty header = end of headers */
156	560449	if (p == q)
157	0	break;
158
159	560419	if (q - p > maxhdr) {
160	320	VSLb(hp->vsl, SLT_BogoHeader, "Header too long: %.*s",
161	160	(int)(q - p > 20 ? 20 : q - p), p);
162	160	return (400);
163		}
164
165	560259	if (vct_islws(*p)) {
166	160	VSLb(hp->vsl, SLT_BogoHeader,
167		"1st header has white space: %.*s",
168	80	(int)(q - p > 20 ? 20 : q - p), p);
169	80	return (400);
170		}
171
172	560179	if (*p == ':') {
173	80	VSLb(hp->vsl, SLT_BogoHeader,
174		"Missing header name: %.*s",
175	40	(int)(q - p > 20 ? 20 : q - p), p);
176	40	return (400);
177		}
178
179	560859	while (q > p && vct_issp(q[-1]))
180	720	q--;
181	560109	*q = '\0';
182
183	4867975	for (s = p; *s != ':' && s < q; s++) {
184	4308066	if (!vct_istchar(*s)) {
185	400	VSLb(hp->vsl, SLT_BogoHeader,
186	200	"Illegal char 0x%02x in header name", *s);
187	200	return (400);
188		}
189	4307866	}
190	559909	if (*s != ':') {
191	80	VSLb(hp->vsl, SLT_BogoHeader, "Header without ':' %.*s",
192	40	(int)(q - p > 20 ? 20 : q - p), p);
193	40	return (400);
194		}
195
196	559869	if (hp->nhd < hp->shd) {
197	559869	hp->hdf[hp->nhd] = 0;
198	559869	hp->hd[hp->nhd].b = p;
199	559869	hp->hd[hp->nhd].e = q;
200	559869	hp->nhd++;
201	559869	} else {
202	0	VSLb(hp->vsl, SLT_BogoHeader, "Too many headers: %.*s",
203	0	(int)(q - p > 20 ? 20 : q - p), p);
204	0	return (400);
205		}
206	559869	}
207	203881	i = vct_iscrlf(p, htc->rxbuf_e);
208	203881	assert(i > 0); /* HTTP1_Complete guarantees this */
209	203879	p += i;
210	203879	HTC_RxPipeline(htc, p);
211	203879	htc->rxbuf_e = p;
212	203879	return (0);
213	204559	}
214
215		/*--------------------------------------------------------------------
216		* Deal with first line of HTTP protocol message.
217		*/
218
219		static uint16_t
220	204795	http1_splitline(struct http hp, struct http_conn htc, const int *hf,
221		unsigned maxhdr)
222		{
223		char p, q;
224		int i;
225
226	204795	assert(hf == HTTP1_Req \|\| hf == HTTP1_Resp);
227	204795	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
228	204795	CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
229	204795	assert(htc->rxbuf_e >= htc->rxbuf_b);
230
231	204795	AZ(hp->hd[hf[0]].b);
232	204795	AZ(hp->hd[hf[1]].b);
233	204795	AZ(hp->hd[hf[2]].b);
234
235		/* Skip leading LWS */
236	204995	for (p = htc->rxbuf_b ; vct_islws(*p); p++)
237	200	continue;
238	204795	hp->hd[hf[0]].b = p;
239
240		/* First field cannot contain SP or CTL */
241	1228480	for (; !vct_issp(*p); p++) {
242	1023845	if (vct_isctl(*p))
243	160	return (400);
244	1023685	}
245	204635	hp->hd[hf[0]].e = p;
246	204635	assert(Tlen(hp->hd[hf[0]]));
247	204635	*p++ = '\0';
248
249		/* Skip SP */
250	204875	for (; vct_issp(*p); p++) {
251	240	if (vct_isctl(*p))
252	0	return (400);
253	240	}
254	204635	hp->hd[hf[1]].b = p;
255
256		/* Second field cannot contain LWS or CTL */
257	1482507	for (; !vct_islws(*p); p++) {
258	1277872	if (vct_isctl(*p))
259	0	return (400);
260	1277872	}
261	204635	hp->hd[hf[1]].e = p;
262	204635	if (!Tlen(hp->hd[hf[1]]))
263	40	return (400);
264
265		/* Skip SP */
266	204595	q = p;
267	408905	for (; vct_issp(*p); p++) {
268	204310	if (vct_isctl(*p))
269	0	return (400);
270	204310	}
271	204595	if (q < p)
272	204271	q = '\0'; / Nul guard for the 2nd field. If q == p
273		* (the third optional field is not
274		* present), the last nul guard will
275		* cover this field. */
276
277		/* Third field is optional and cannot contain CTL except TAB */
278	204595	q = p;
279	1362204	for (; p < htc->rxbuf_e && !vct_iscrlf(p, htc->rxbuf_e); p++) {
280	1157649	if (vct_isctl(p) && !vct_issp(p))
281	40	return (400);
282	1157609	}
283	204545	if (p > q) {
284	204109	hp->hd[hf[2]].b = q;
285	204109	hp->hd[hf[2]].e = p;
286	204109	}
287
288		/* Skip CRLF */
289	204545	i = vct_iscrlf(p, htc->rxbuf_e);
290	204545	if (!i)
291	0	return (400);
292	204545	*p = '\0';
293	204545	p += i;
294
295	204545	http_Proto(hp);
296
297	204545	return (http1_dissect_hdrs(hp, p, htc, maxhdr));
298	204785	}
299
300		/--------------------------------------------------------------------/
301
302		static body_status_t
303	203683	http1_body_status(const struct http hp, struct http_conn htc, int request)
304		{
305		ssize_t cl;
306		const char *b;
307
308	203683	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
309	203683	CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
310
311	203683	htc->content_length = -1;
312
313	203683	cl = http_GetContentLength(hp);
314	203683	if (cl == -2)
315	160	return (BS_ERROR);
316	203523	if (http_GetHdr(hp, H_Transfer_Encoding, &b)) {
317	6240	if (!http_coding_eq(b, chunked))
318	80	return (BS_ERROR);
319	6160	if (cl != -1) {
320		/*
321		* RFC7230 3.3.3 allows more lenient handling
322		* but we're going to be strict.
323		*/
324	80	return (BS_ERROR);
325		}
326	6080	return (BS_CHUNKED);
327		}
328	197283	if (cl >= 0) {
329	75435	htc->content_length = cl;
330	75435	return (cl == 0 ? BS_NONE : BS_LENGTH);
331		}
332
333	121848	if (hp->protover == 11 && request)
334	119568	return (BS_NONE);
335
336	2280	if (http_HdrIs(hp, H_Connection, "keep-alive")) {
337		/*
338		* Keep alive with neither TE=Chunked or C-Len is impossible.
339		* We assume a zero length body.
340		*/
341	80	return (BS_NONE);
342		}
343
344		/*
345		* Fall back to EOF transfer.
346		*/
347	2200	return (BS_EOF);
348	203683	}
349
350		/--------------------------------------------------------------------/
351
352		uint16_t
353	125006	HTTP1_DissectRequest(struct http_conn htc, struct http hp)
354		{
355		uint16_t retval;
356		const char *p;
357	125006	const char b = NULL, e;
358
359	125006	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
360	125006	CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
361
362	250012	retval = http1_splitline(hp, htc,
363	125006	HTTP1_Req, cache_param->http_req_hdr_len);
364	125006	if (retval != 0)
365	600	return (retval);
366
367	124406	if (hp->protover < 10 \|\| hp->protover > 11)
368	480	return (400);
369
370		/* RFC2616, section 5.2, point 1 */
371	123926	if (http_scheme_at(hp->hd[HTTP_HDR_URL].b, http))
372	120	b = hp->hd[HTTP_HDR_URL].b + 7;
373	123806	else if (FEATURE(FEATURE_HTTPS_SCHEME) &&
374	40	http_scheme_at(hp->hd[HTTP_HDR_URL].b, https))
375	40	b = hp->hd[HTTP_HDR_URL].b + 8;
376	123926	if (b) {
377	160	e = strchr(b, '/');
378	160	if (e) {
379	160	http_Unset(hp, H_Host);
380	160	http_PrintfHeader(hp, "Host: %.*s", (int)(e - b), b);
381	160	hp->hd[HTTP_HDR_URL].b = e;
382	160	}
383	160	}
384
385	123926	htc->body_status = http1_body_status(hp, htc, 1);
386	123926	if (htc->body_status == BS_ERROR)
387	160	return (400);
388
389	123766	p = http_GetMethod(hp);
390	123766	AN(p);
391
392	123766	if (htc->body_status == BS_EOF) {
393	560	assert(hp->protover == 10);
394		/* RFC1945 8.3 p32 and D.1.1 p58 */
395	560	if (http_method_eq(p, POST) \|\| http_method_eq(p, PUT))
396	80	return (400);
397	480	htc->body_status = BS_NONE;
398	480	}
399
400		/* HEAD with a body is a hard error */
401	123686	if (htc->body_status != BS_NONE && http_method_eq(p, HEAD))
402	0	return (400);
403
404	123686	return (retval);
405	125006	}
406
407		/--------------------------------------------------------------------/
408
409		uint16_t
410	79799	HTTP1_DissectResponse(struct http_conn htc, struct http hp,
411		const struct http *rhttp)
412		{
413	79799	uint16_t retval = 0;
414		const char *p;
415
416	79799	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
417	79799	CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
418	79799	CHECK_OBJ_NOTNULL(rhttp, HTTP_MAGIC);
419
420	159598	if (http1_splitline(hp, htc,
421	79799	HTTP1_Resp, cache_param->http_resp_hdr_len))
422	320	retval = 503;
423
424	79799	if (retval == 0 && hp->protover < 10)
425	0	retval = 503;
426
427	79799	if (retval == 0 && hp->protover > rhttp->protover)
428	40	http_SetH(hp, HTTP_HDR_PROTO, rhttp->hd[HTTP_HDR_PROTO].b);
429
430	79799	if (retval == 0 && Tlen(hp->hd[HTTP_HDR_STATUS]) != 3)
431	120	retval = 503;
432
433	79799	if (retval == 0) {
434	79356	p = hp->hd[HTTP_HDR_STATUS].b;
435
436	158472	if (p[0] >= '1' && p[0] <= '9' &&
437	79236	p[1] >= '0' && p[1] <= '9' &&
438	79156	p[2] >= '0' && p[2] <= '9')
439	79076	hp->status =
440	79076	100 * (p[0] - '0') + 10 * (p[1] - '0') + p[2] - '0';
441		else
442	280	retval = 503;
443	79356	}
444
445	79799	if (retval != 0) {
446	1440	VSLb(hp->vsl, SLT_HttpGarbage, "%.*s",
447	720	(int)(htc->rxbuf_e - htc->rxbuf_b), htc->rxbuf_b);
448	720	assert(retval >= 100 && retval <= 999);
449	720	assert(retval == 503);
450	720	http_SetStatus(hp, 503, NULL);
451	720	}
452
453	79799	if (hp->hd[HTTP_HDR_REASON].b == NULL \|\|
454	79716	!Tlen(hp->hd[HTTP_HDR_REASON])) {
455	172	http_SetH(hp, HTTP_HDR_REASON,
456	86	http_Status2Reason(hp->status, NULL));
457	86	}
458
459	79793	htc->body_status = http1_body_status(hp, htc, 0);
460
461	79793	return (retval);
462		}
463
464		/--------------------------------------------------------------------/
465
466		static unsigned
467	2090088	http1_WrTxt(const struct worker wrk, const txt hh, const char *suf)
468		{
469		unsigned u;
470
471	2090088	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
472	2090088	AN(wrk);
473	2090088	AN(hh);
474	2090088	AN(hh->b);
475	2090088	AN(hh->e);
476	2090088	u = V1L_Write(wrk, hh->b, hh->e - hh->b);
477	2090088	if (suf != NULL)
478	2089813	u += V1L_Write(wrk, suf, -1);
479	2090090	return (u);
480		}
481
482		unsigned
483	197786	HTTP1_Write(const struct worker w, const struct http hp, const int *hf)
484		{
485		unsigned u, l;
486
487	197786	assert(hf == HTTP1_Req \|\| hf == HTTP1_Resp);
488	197786	AN(hp->hd[hf[0]].b);
489	197786	AN(hp->hd[hf[1]].b);
490	197786	AN(hp->hd[hf[2]].b);
491	197786	l = http1_WrTxt(w, &hp->hd[hf[0]], " ");
492	197786	l += http1_WrTxt(w, &hp->hd[hf[1]], " ");
493	197786	l += http1_WrTxt(w, &hp->hd[hf[2]], "\r\n");
494
495	1694809	for (u = HTTP_HDR_FIRST; u < hp->nhd; u++)
496	1497023	l += http1_WrTxt(w, &hp->hd[u], "\r\n");
497	197786	l += V1L_Write(w, "\r\n", -1);
498	197786	return (l);
499		}