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.
 */

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(struct v1l *v1l, const txt *hh, const char *suf)
{
        unsigned u;

        AN(hh);
        AN(hh->b);
        AN(hh->e);
        u = V1L_Write(v1l, hh->b, hh->e - hh->b);
        if (suf != NULL)
                u += V1L_Write(v1l, suf, -1);
        return (u);
}

unsigned
HTTP1_Write(struct v1l *v1l, 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(v1l, &hp->hd[hf[0]], " ");
        l += http1_WrTxt(v1l, &hp->hd[hf[1]], " ");
        l += http1_WrTxt(v1l, &hp->hd[hf[2]], "\r\n");

        for (u = HTTP_HDR_FIRST; u < hp->nhd; u++)
                l += http1_WrTxt(v1l, &hp->hd[u], "\r\n");
        l += V1L_Write(v1l, "\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	12869	HTTP1_Complete(struct http_conn *htc)
67		{
68		char *p;
69		enum htc_status_e retval;
70
71	12869	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
72	12869	AN(WS_Reservation(htc->ws));
73	12869	assert(pdiff(htc->rxbuf_b, htc->rxbuf_e) <= WS_ReservationSize(htc->ws));
74
75		/* Skip any leading white space */
76	12906	for (p = htc->rxbuf_b ; p < htc->rxbuf_e && vct_islws(*p); p++)
77	37	continue;
78	12869	if (p == htc->rxbuf_e)
79	6997	return (HTC_S_EMPTY);
80
81		/* Do not return a partial H2 connection preface */
82	5872	retval = H2_prism_complete(htc);
83	5872	if (retval != HTC_S_JUNK)
84	296	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	20150	while (1) {
91	20150	p = memchr(p, '\n', htc->rxbuf_e - p);
92	20150	if (p == NULL)
93	302	return (HTC_S_MORE);
94	19848	if (++p == htc->rxbuf_e)
95	21	return (HTC_S_MORE);
96	19827	if (*p == '\r' && ++p == htc->rxbuf_e)
97	3	return (HTC_S_MORE);
98	19824	if (*p == '\n')
99	5250	break;
100		}
101	5250	return (HTC_S_COMPLETE);
102	12869	}
103
104		/*--------------------------------------------------------------------
105		* Dissect the headers of the HTTP protocol message.
106		*/
107
108		static uint16_t
109	5246	http1_dissect_hdrs(struct http hp, char p, struct http_conn *htc,
110		unsigned maxhdr)
111		{
112		char q, r, *s;
113		int i;
114
115	5246	assert(p > htc->rxbuf_b);
116	5246	assert(p <= htc->rxbuf_e);
117	5246	hp->nhd = HTTP_HDR_FIRST;
118	5246	r = NULL; /* For FlexeLint */
119	19580	for (; p < htc->rxbuf_e; p = r) {
120
121		/* Find end of next header */
122	19578	q = r = p;
123	19578	if (vct_iscrlf(p, htc->rxbuf_e))
124	5227	break;
125	304149	while (r < htc->rxbuf_e) {
126	304149	if (vct_ishdrval(*r)) {
127	289789	r++;
128	289789	continue;
129		}
130	14360	i = vct_iscrlf(r, htc->rxbuf_e);
131	14360	if (i == 0) {
132	8	VSLb(hp->vsl, SLT_BogoHeader,
133	4	"Header has ctrl char 0x%02x", *r);
134	4	return (400);
135		}
136	14356	q = r;
137	14356	r += i;
138	14356	assert(r <= htc->rxbuf_e);
139	14356	if (r == htc->rxbuf_e)
140	0	break;
141	14356	if (vct_iscrlf(r, htc->rxbuf_e))
142	5219	break;
143		/* If line does not continue: got it. */
144	9137	if (!vct_issp(*r))
145	9128	break;
146
147		/* Clear line continuation LWS to spaces */
148	18	while (q < r)
149	9	*q++ = ' ';
150	19	while (q < htc->rxbuf_e && vct_issp(*q))
151	10	*q++ = ' ';
152		}
153
154		/* Empty header = end of headers */
155	14347	if (p == q)
156	0	break;
157
158	14347	if (q - p > maxhdr) {
159	8	VSLb(hp->vsl, SLT_BogoHeader, "Header too long: %.*s",
160	4	(int)(q - p > 20 ? 20 : q - p), p);
161	4	return (400);
162		}
163
164	14343	if (vct_islws(*p)) {
165	4	VSLb(hp->vsl, SLT_BogoHeader,
166		"1st header has white space: %.*s",
167	2	(int)(q - p > 20 ? 20 : q - p), p);
168	2	return (400);
169		}
170
171	14341	if (*p == ':') {
172	2	VSLb(hp->vsl, SLT_BogoHeader,
173		"Missing header name: %.*s",
174	1	(int)(q - p > 20 ? 20 : q - p), p);
175	1	return (400);
176		}
177
178	14358	while (q > p && vct_issp(q[-1]))
179	18	q--;
180	14340	*q = '\0';
181
182	124540	for (s = p; *s != ':' && s < q; s++) {
183	110205	if (!vct_istchar(*s)) {
184	10	VSLb(hp->vsl, SLT_BogoHeader,
185	5	"Illegal char 0x%02x in header name", *s);
186	5	return (400);
187		}
188	110200	}
189	14335	if (*s != ':') {
190	2	VSLb(hp->vsl, SLT_BogoHeader, "Header without ':' %.*s",
191	1	(int)(q - p > 20 ? 20 : q - p), p);
192	1	return (400);
193		}
194
195	14334	if (hp->nhd < hp->shd) {
196	14334	hp->hdf[hp->nhd] = 0;
197	14334	hp->hd[hp->nhd].b = p;
198	14334	hp->hd[hp->nhd].e = q;
199	14334	hp->nhd++;
200	14334	} else {
201	0	VSLb(hp->vsl, SLT_BogoHeader, "Too many headers: %.*s",
202	0	(int)(q - p > 20 ? 20 : q - p), p);
203	0	return (400);
204		}
205	14334	}
206	5229	i = vct_iscrlf(p, htc->rxbuf_e);
207	5229	assert(i > 0); /* HTTP1_Complete guarantees this */
208	5225	p += i;
209	5225	HTC_RxPipeline(htc, p);
210	5225	htc->rxbuf_e = p;
211	5225	return (0);
212	5242	}
213
214		/*--------------------------------------------------------------------
215		* Deal with first line of HTTP protocol message.
216		*/
217
218		static uint16_t
219	5251	http1_splitline(struct http hp, struct http_conn htc, const int *hf,
220		unsigned maxhdr)
221		{
222		char p, q;
223		int i;
224
225	5251	assert(hf == HTTP1_Req \|\| hf == HTTP1_Resp);
226	5251	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
227	5251	CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
228	5251	assert(htc->rxbuf_e >= htc->rxbuf_b);
229
230	5251	AZ(hp->hd[hf[0]].b);
231	5251	AZ(hp->hd[hf[1]].b);
232	5251	AZ(hp->hd[hf[2]].b);
233
234		/* Skip leading LWS */
235	5256	for (p = htc->rxbuf_b ; vct_islws(*p); p++)
236	5	continue;
237	5251	hp->hd[hf[0]].b = p;
238
239		/* First field cannot contain SP or CTL */
240	31431	for (; !vct_issp(*p); p++) {
241	26184	if (vct_isctl(*p))
242	4	return (400);
243	26180	}
244	5247	hp->hd[hf[0]].e = p;
245	5247	assert(Tlen(hp->hd[hf[0]]));
246	5247	*p++ = '\0';
247
248		/* Skip SP */
249	5253	for (; vct_issp(*p); p++) {
250	6	if (vct_isctl(*p))
251	0	return (400);
252	6	}
253	5247	hp->hd[hf[1]].b = p;
254
255		/* Second field cannot contain LWS or CTL */
256	37715	for (; !vct_islws(*p); p++) {
257	32468	if (vct_isctl(*p))
258	0	return (400);
259	32468	}
260	5247	hp->hd[hf[1]].e = p;
261	5247	if (!Tlen(hp->hd[hf[1]]))
262	1	return (400);
263
264		/* Skip SP */
265	5246	q = p;
266	10483	for (; vct_issp(*p); p++) {
267	5237	if (vct_isctl(*p))
268	0	return (400);
269	5237	}
270	5246	if (q < p)
271	5237	q = '\0'; / Nul guard for the 2nd field. If q == p
272		* (the third optional field is not
273		* present), the last nul guard will
274		* cover this field. */
275
276		/* Third field is optional and cannot contain CTL except TAB */
277	5246	q = p;
278	34988	for (; p < htc->rxbuf_e && !vct_iscrlf(p, htc->rxbuf_e); p++) {
279	29743	if (vct_isctl(p) && !vct_issp(p))
280	1	return (400);
281	29742	}
282	5243	if (p > q) {
283	5232	hp->hd[hf[2]].b = q;
284	5232	hp->hd[hf[2]].e = p;
285	5232	}
286
287		/* Skip CRLF */
288	5243	i = vct_iscrlf(p, htc->rxbuf_e);
289	5243	if (!i)
290	0	return (400);
291	5243	*p = '\0';
292	5243	p += i;
293
294	5243	http_Proto(hp);
295
296	5243	return (http1_dissect_hdrs(hp, p, htc, maxhdr));
297	5249	}
298
299		/--------------------------------------------------------------------/
300
301		static body_status_t
302	5222	http1_body_status(const struct http hp, struct http_conn htc, int request)
303		{
304		ssize_t cl;
305		const char *b;
306
307	5222	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
308	5222	CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
309
310	5222	htc->content_length = -1;
311
312	5222	cl = http_GetContentLength(hp);
313	5222	if (cl == -2)
314	4	return (BS_ERROR);
315	5218	if (http_GetHdr(hp, H_Transfer_Encoding, &b)) {
316	161	if (!http_coding_eq(b, chunked))
317	2	return (BS_ERROR);
318	159	if (cl != -1) {
319		/*
320		* RFC7230 3.3.3 allows more lenient handling
321		* but we're going to be strict.
322		*/
323	2	return (BS_ERROR);
324		}
325	157	return (BS_CHUNKED);
326		}
327	5057	if (cl >= 0) {
328	1927	htc->content_length = cl;
329	1927	return (cl == 0 ? BS_NONE : BS_LENGTH);
330		}
331
332	3130	if (hp->protover == 11 && request)
333	3073	return (BS_NONE);
334
335	57	if (http_HdrIs(hp, H_Connection, "keep-alive")) {
336		/*
337		* Keep alive with neither TE=Chunked or C-Len is impossible.
338		* We assume a zero length body.
339		*/
340	2	return (BS_NONE);
341		}
342
343		/*
344		* Fall back to EOF transfer.
345		*/
346	55	return (BS_EOF);
347	5222	}
348
349		/--------------------------------------------------------------------/
350
351		uint16_t
352	3215	HTTP1_DissectRequest(struct http_conn htc, struct http hp)
353		{
354		uint16_t retval;
355		const char *p;
356	3215	const char b = NULL, e;
357
358	3215	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
359	3215	CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
360
361	6430	retval = http1_splitline(hp, htc,
362	3215	HTTP1_Req, cache_param->http_req_hdr_len);
363	3215	if (retval != 0)
364	15	return (retval);
365
366	3200	if (hp->protover < 10 \|\| hp->protover > 11)
367	12	return (400);
368
369		/* RFC2616, section 5.2, point 1 */
370	3188	if (http_scheme_at(hp->hd[HTTP_HDR_URL].b, http))
371	3	b = hp->hd[HTTP_HDR_URL].b + 7;
372	3185	else if (FEATURE(FEATURE_HTTPS_SCHEME) &&
373	1	http_scheme_at(hp->hd[HTTP_HDR_URL].b, https))
374	1	b = hp->hd[HTTP_HDR_URL].b + 8;
375	3188	if (b) {
376	4	e = strchr(b, '/');
377	4	if (e) {
378	4	http_Unset(hp, H_Host);
379	4	http_PrintfHeader(hp, "Host: %.*s", (int)(e - b), b);
380	4	hp->hd[HTTP_HDR_URL].b = e;
381	4	}
382	4	}
383
384	3188	htc->body_status = http1_body_status(hp, htc, 1);
385	3188	if (htc->body_status == BS_ERROR)
386	4	return (400);
387
388	3184	p = http_GetMethod(hp);
389	3184	AN(p);
390
391	3184	if (htc->body_status == BS_EOF) {
392	14	assert(hp->protover == 10);
393		/* RFC1945 8.3 p32 and D.1.1 p58 */
394	14	if (http_method_eq(p, POST) \|\| http_method_eq(p, PUT))
395	2	return (400);
396	12	htc->body_status = BS_NONE;
397	12	}
398
399		/* HEAD with a body is a hard error */
400	3182	if (htc->body_status != BS_NONE && http_method_eq(p, HEAD))
401	0	return (400);
402
403	3182	return (retval);
404	3215	}
405
406		/--------------------------------------------------------------------/
407
408		uint16_t
409	2035	HTTP1_DissectResponse(struct http_conn htc, struct http hp,
410		const struct http *rhttp)
411		{
412	2035	uint16_t retval = 0;
413		const char *p;
414
415	2035	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
416	2035	CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
417	2035	CHECK_OBJ_NOTNULL(rhttp, HTTP_MAGIC);
418
419	4070	if (http1_splitline(hp, htc,
420	2035	HTTP1_Resp, cache_param->http_resp_hdr_len))
421	8	retval = 503;
422
423	2035	if (retval == 0 && hp->protover < 10)
424	0	retval = 503;
425
426	2035	if (retval == 0 && hp->protover > rhttp->protover)
427	1	http_SetH(hp, HTTP_HDR_PROTO, rhttp->hd[HTTP_HDR_PROTO].b);
428
429	2035	if (retval == 0 && Tlen(hp->hd[HTTP_HDR_STATUS]) != 3)
430	3	retval = 503;
431
432	2035	if (retval == 0) {
433	2024	p = hp->hd[HTTP_HDR_STATUS].b;
434
435	4042	if (p[0] >= '1' && p[0] <= '9' &&
436	2021	p[1] >= '0' && p[1] <= '9' &&
437	2019	p[2] >= '0' && p[2] <= '9')
438	2017	hp->status =
439	2017	100 * (p[0] - '0') + 10 * (p[1] - '0') + p[2] - '0';
440		else
441	7	retval = 503;
442	2024	}
443
444	2035	if (retval != 0) {
445	36	VSLb(hp->vsl, SLT_HttpGarbage, "%.*s",
446	18	(int)(htc->rxbuf_e - htc->rxbuf_b), htc->rxbuf_b);
447	18	assert(retval >= 100 && retval <= 999);
448	18	assert(retval == 503);
449	18	http_SetStatus(hp, 503, NULL);
450	18	}
451
452	2035	if (hp->hd[HTTP_HDR_REASON].b == NULL \|\|
453	2033	!Tlen(hp->hd[HTTP_HDR_REASON])) {
454	4	http_SetH(hp, HTTP_HDR_REASON,
455	2	http_Status2Reason(hp->status, NULL));
456	2	}
457
458	2035	htc->body_status = http1_body_status(hp, htc, 0);
459
460	2035	return (retval);
461		}
462
463		/--------------------------------------------------------------------/
464
465		static unsigned
466	53644	http1_WrTxt(struct v1l v1l, const txt hh, const char *suf)
467		{
468		unsigned u;
469
470	53644	AN(hh);
471	53644	AN(hh->b);
472	53644	AN(hh->e);
473	53644	u = V1L_Write(v1l, hh->b, hh->e - hh->b);
474	53644	if (suf != NULL)
475	53641	u += V1L_Write(v1l, suf, -1);
476	53644	return (u);
477		}
478
479		unsigned
480	5079	HTTP1_Write(struct v1l v1l, const struct http hp, const int *hf)
481		{
482		unsigned u, l;
483
484	5079	assert(hf == HTTP1_Req \|\| hf == HTTP1_Resp);
485	5079	AN(hp->hd[hf[0]].b);
486	5079	AN(hp->hd[hf[1]].b);
487	5079	AN(hp->hd[hf[2]].b);
488	5079	l = http1_WrTxt(v1l, &hp->hd[hf[0]], " ");
489	5079	l += http1_WrTxt(v1l, &hp->hd[hf[1]], " ");
490	5079	l += http1_WrTxt(v1l, &hp->hd[hf[2]], "\r\n");
491
492	43507	for (u = HTTP_HDR_FIRST; u < hp->nhd; u++)
493	38428	l += http1_WrTxt(v1l, &hp->hd[u], "\r\n");
494	5079	l += V1L_Write(v1l, "\r\n", -1);
495	5079	return (l);
496		}