include/types/proto_http.h - haproxy - Gitiles

 /*
  * include/types/proto_http.h
  * This file contains HTTP protocol definitions.
  *
  * Copyright (C) 2000-2011 Willy Tarreau - w@1wt.eu
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation, version 2.1
  * exclusively.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */

 #ifndef _TYPES_PROTO_HTTP_H
 #define _TYPES_PROTO_HTTP_H

 #include <common/config.h>

 #include <types/buffers.h>
 #include <types/hdr_idx.h>

 /* These are the flags that are found in txn->flags */

 /* action flags */
 #define TX_CLDENY	0x00000001	/* a client header matches a deny regex */
 #define TX_CLALLOW	0x00000002	/* a client header matches an allow regex */
 #define TX_SVDENY	0x00000004	/* a server header matches a deny regex */
 #define TX_SVALLOW	0x00000008	/* a server header matches an allow regex */
 #define TX_CLTARPIT	0x00000010	/* the session is tarpitted (anti-dos) */

 /* transaction flags dedicated to cookies : bits values 0x20 to 0x80 (0-7 shift 5) */
 #define TX_CK_NONE	0x00000000	/* this session had no cookie */
 #define TX_CK_INVALID	0x00000020	/* this session had a cookie which matches no server */
 #define TX_CK_DOWN	0x00000040	/* this session had cookie matching a down server */
 #define TX_CK_VALID	0x00000060	/* this session had cookie matching a valid server */
 #define TX_CK_EXPIRED	0x00000080	/* this session had an expired cookie (idle for too long) */
 #define TX_CK_OLD	0x000000A0	/* this session had too old a cookie (offered too long ago) */
 #define TX_CK_MASK	0x000000E0	/* mask to get this session's cookie flags */
 #define TX_CK_SHIFT	5		/* bit shift */

 /* response cookie information, bits values 0x100 to 0x700 (0-7 shift 8) */
 #define TX_SCK_NONE	0x00000000	/* no cookie found in the response */
 #define TX_SCK_FOUND    0x00000100	/* a persistence cookie was found and forwarded */
 #define TX_SCK_DELETED	0x00000200	/* an existing persistence cookie was deleted */
 #define TX_SCK_INSERTED	0x00000300	/* a persistence cookie was inserted */
 #define TX_SCK_REPLACED	0x00000400	/* a persistence cookie was present and rewritten */
 #define TX_SCK_UPDATED	0x00000500	/* an expirable persistence cookie was updated */
 #define TX_SCK_MASK	0x00000700	/* mask to get the set-cookie field */
 #define TX_SCK_SHIFT	8		/* bit shift */

 #define TX_SCK_PRESENT  0x00000800	/* a cookie was found in the server's response */

 /* cacheability management, bits values 0x1000 to 0x3000 (0-3 shift 12) */
 #define TX_CACHEABLE	0x00001000	/* at least part of the response is cacheable */
 #define TX_CACHE_COOK	0x00002000	/* a cookie in the response is cacheable */
 #define TX_CACHE_SHIFT	12		/* bit shift */

 /* request and response HTTP version */
 #define TX_REQ_VER_11	0x00004000	/* the request is HTTP/1.1 or above */
 #define TX_RES_VER_11	0x00008000	/* the response is HTTP/1.1 or above */

 /* report presence of transfer-encoding:chunked and content-length headers */
 #define TX_REQ_CNT_LEN	0x00010000	/* content-length present in the request */
 #define TX_REQ_TE_CHNK	0x00020000	/* transfer-encoding: chunked present in the request */
 #define TX_RES_CNT_LEN	0x00040000	/* content-length present in the response */
 #define TX_RES_TE_CHNK	0x00080000	/* transfer-encoding: chunked present in the response */

 /* indicate how we *want* the connection to behave, regardless of what is in
  * the headers. We have 4 possible values right now :
  * - WANT_TUN : will be a tunnel (default when nothing configured or with CONNECT).
  * - WANT_KAL : try to maintain keep-alive
  * - WANT_SCL : enforce close on the server side
  * - WANT_CLO : enforce close on both sides
  */
 #define TX_CON_WANT_TUN 0x00000000	/* note: it's important that it is 0 (init) */
 #define TX_CON_WANT_KAL 0x00100000
 #define TX_CON_WANT_SCL 0x00200000
 #define TX_CON_WANT_CLO 0x00300000
 #define TX_CON_WANT_MSK 0x00300000	/* this is the mask to get the bits */

 #define TX_CON_CLO_SET  0x00400000	/* "connection: close" is now set */
 #define TX_CON_KAL_SET  0x00800000	/* "connection: keep-alive" is now set */

 /* if either of these flags is not set, we may be forced to complete an
  * connection as a half-way tunnel. For instance, if no content-length
  * appears in a 1.1 response, but the request is correctly sized.
  */
 #define TX_REQ_XFER_LEN	0x01000000	/* request xfer size can be determined */
 #define TX_RES_XFER_LEN	0x02000000	/* response xfer size can be determined */
 #define TX_WAIT_NEXT_RQ	0x04000000	/* waiting for the second request to start, use keep-alive timeout */

 #define TX_HDR_CONN_PRS	0x08000000	/* "connection" header already parsed (req or res), results below */
 #define TX_HDR_CONN_CLO	0x10000000	/* "Connection: close" was present at least once */
 #define TX_HDR_CONN_KAL	0x20000000	/* "Connection: keep-alive" was present at least once */
 #define TX_USE_PX_CONN	0x40000000	/* Use "Proxy-Connection" instead of "Connection" */

 /* used only for keep-alive purposes, to indicate we're on a second transaction */
 #define TX_NOT_FIRST	0x80000000	/* the transaction is not the first one */
 /* no more room for transaction flags ! */

 /* The HTTP parser is more complex than it looks like, because we have to
  * support multi-line headers and any number of spaces between the colon and
  * the value.
  *
  * All those examples must work :

  Hdr1:val1\r\n
  Hdr1: val1\r\n
  Hdr1:\t val1\r\n
  Hdr1: \r\n
   val1\r\n
  Hdr1:\r\n
   val1\n
  \tval2\r\n
   val3\n

  *
  */

 /* Possible states while parsing HTTP messages (request|response) */
 #define HTTP_MSG_RQBEFORE      0 // request: leading LF, before start line
 #define HTTP_MSG_RQBEFORE_CR   1 // request: leading CRLF, before start line

 /* these ones define a request start line */
 #define HTTP_MSG_RQMETH        2 // parsing the Method
 #define HTTP_MSG_RQMETH_SP     3 // space(s) after the ethod
 #define HTTP_MSG_RQURI         4 // parsing the Request URI
 #define HTTP_MSG_RQURI_SP      5 // space(s) after the Request URI
 #define HTTP_MSG_RQVER         6 // parsing the Request Version
 #define HTTP_MSG_RQLINE_END    7 // end of request line (CR or LF)

 #define HTTP_MSG_RPBEFORE      8 // response: leading LF, before start line
 #define HTTP_MSG_RPBEFORE_CR   9 // response: leading CRLF, before start line

 /* these ones define a response start line */
 #define HTTP_MSG_RPVER        10 // parsing the Response Version
 #define HTTP_MSG_RPVER_SP     11 // space(s) after the Response Version
 #define HTTP_MSG_RPCODE       12 // response code
 #define HTTP_MSG_RPCODE_SP    13 // space(s) after the response code
 #define HTTP_MSG_RPREASON     14 // response reason
 #define HTTP_MSG_RPLINE_END   15 // end of response line (CR or LF)

 /* common header processing */

 #define HTTP_MSG_HDR_FIRST    16 // waiting for first header or last CRLF (no LWS possible)
 #define HTTP_MSG_HDR_NAME     17 // parsing header name
 #define HTTP_MSG_HDR_COL      18 // parsing header colon
 #define HTTP_MSG_HDR_L1_SP    19 // parsing header LWS (SP|HT) before value
 #define HTTP_MSG_HDR_L1_LF    20 // parsing header LWS (LF) before value
 #define HTTP_MSG_HDR_L1_LWS   21 // checking whether it's a new header or an LWS
 #define HTTP_MSG_HDR_VAL      22 // parsing header value
 #define HTTP_MSG_HDR_L2_LF    23 // parsing header LWS (LF) inside/after value
 #define HTTP_MSG_HDR_L2_LWS   24 // checking whether it's a new header or an LWS

 #define HTTP_MSG_LAST_LF      25 // parsing last LF

 /* error state : must be before HTTP_MSG_BODY so that (>=BODY) always indicates
  * that data are being processed.
  */

 #define HTTP_MSG_ERROR        26 // an error occurred

 /* Body processing.
  * The state HTTP_MSG_BODY is a delimiter to know if we're waiting for headers
  * or body. All the sub-states below also indicate we're processing the body,
  * with some additional information.
  */
 #define HTTP_MSG_BODY         27 // parsing body at end of headers
 #define HTTP_MSG_100_SENT     28 // parsing body after a 100-Continue was sent
 #define HTTP_MSG_CHUNK_SIZE   29 // parsing the chunk size (RFC2616 #3.6.1)
 #define HTTP_MSG_DATA         30 // skipping data chunk / content-length data
 #define HTTP_MSG_DATA_CRLF    31 // skipping CRLF after data chunk
 #define HTTP_MSG_TRAILERS     32 // trailers (post-data entity headers)

 /* we enter this state when we've received the end of the current message */
 #define HTTP_MSG_DONE         33 // message end received, waiting for resync or close
 #define HTTP_MSG_CLOSING      34 // shutdown_w done, not all bytes sent yet
 #define HTTP_MSG_CLOSED       35 // shutdown_w done, all bytes sent
 #define HTTP_MSG_TUNNEL       36 // tunneled data after DONE

 /* Redirect flags */
 enum {
 	REDIRECT_FLAG_NONE = 0,
 	REDIRECT_FLAG_DROP_QS = 1,	/* drop query string */
 	REDIRECT_FLAG_APPEND_SLASH = 2,	/* append a slash if missing at the end */
 };

 /* Redirect types (location, prefix, extended ) */
 enum {
 	REDIRECT_TYPE_NONE = 0,         /* no redirection */
 	REDIRECT_TYPE_LOCATION,         /* location redirect */
 	REDIRECT_TYPE_PREFIX,           /* prefix redirect */
 };

 /* Perist types (force-persist, ignore-persist) */
 enum {
 	PERSIST_TYPE_NONE = 0,          /* no persistence */
 	PERSIST_TYPE_FORCE,             /* force-persist */
 	PERSIST_TYPE_IGNORE,            /* ignore-persist */
 };

 /* Known HTTP methods */
 typedef enum {
 	HTTP_METH_NONE = 0,
 	HTTP_METH_OPTIONS,
 	HTTP_METH_GET,
 	HTTP_METH_HEAD,
 	HTTP_METH_POST,
 	HTTP_METH_PUT,
 	HTTP_METH_DELETE,
 	HTTP_METH_TRACE,
 	HTTP_METH_CONNECT,
 	HTTP_METH_OTHER,
 } http_meth_t;

 enum {
 	HTTP_AUTH_WRONG		= -1,		/* missing or unknown */
 	HTTP_AUTH_UNKNOWN	= 0,
 	HTTP_AUTH_BASIC,
 	HTTP_AUTH_DIGEST,
 };

 enum {
 	HTTP_REQ_ACT_UNKNOWN = 0,
 	HTTP_REQ_ACT_ALLOW,
 	HTTP_REQ_ACT_DENY,
 	HTTP_REQ_ACT_HTTP_AUTH,
 	HTTP_REQ_ACT_MAX
 };

 /*
  * All implemented return codes
  */
 enum {
 	HTTP_ERR_200 = 0,
 	HTTP_ERR_400,
 	HTTP_ERR_403,
 	HTTP_ERR_408,
 	HTTP_ERR_500,
 	HTTP_ERR_502,
 	HTTP_ERR_503,
 	HTTP_ERR_504,
 	HTTP_ERR_SIZE
 };

 /* This is an HTTP message, as described in RFC2616. It can be either a request
  * message or a response message.
  *
  * The values there are a little bit obscure, because their meaning can change
  * during the parsing :
  *
  *  - som (Start of Message) : relative offset in the buffer of first byte of
  *                             the request being processed or parsed. Reset to
  *                             zero during accept(), and changes while parsing
  *                             chunks.
  *  - eoh (End of Headers)   : relative offset in the buffer of first byte that
  *                             is not part of a completely processed header.
  *                             During parsing, it points to last header seen
  *                             for states after START. When in HTTP_MSG_BODY,
  *                             eoh points to the first byte of the last CRLF
  *                             preceeding data.
  *  - col and sov            : When in HTTP_MSG_BODY, will point to the first
  *                             byte of data (relative to buffer).
  *  - sol (start of line)    : start of line, also start of message when fully parsed.
  *  - eol (End of Line)      : relative offset in the buffer of the first byte
  *                             which marks the end of the line (LF or CRLF).
  * Note that all offsets are relative to the beginning of the buffer. To get
  * them relative to the current request, subtract ->som or ->sol.
  */
 struct http_msg {
 	unsigned int msg_state;                /* where we are in the current message parsing */
 	unsigned int col, sov;                 /* current header: colon, start of value */
 	unsigned int eoh;                      /* End Of Headers, relative to buffer */
 	char *sol;                             /* start of line, also start of message when fully parsed */
 	char *eol;                             /* end of line */
 	unsigned int som;                      /* Start Of Message, relative to buffer */
 	int err_pos;                           /* err handling: -2=block, -1=pass, 0+=detected */
 	union {                                /* useful start line pointers, relative to ->sol */
 		struct {
 			int l;                 /* request line length (not including CR) */
 			int m_l;               /* METHOD length (method starts at ->som) */
 			int u, u_l;            /* URI, length */
 			int v, v_l;            /* VERSION, length */
 		} rq;                          /* request line : field, length */
 		struct {
 			int l;                 /* status line length (not including CR) */
 			int v_l;               /* VERSION length (version starts at ->som) */
 			int c, c_l;            /* CODE, length */
 			int r, r_l;            /* REASON, length */
 		} st;                          /* status line : field, length */
 	} sl;                                  /* start line */
 	unsigned long long chunk_len;          /* cache for last chunk size or content-length header value */
 	unsigned long long body_len;           /* total known length of the body, excluding encoding */
 	char **cap;                            /* array of captured headers (may be NULL) */
 };

 struct http_auth_data {
 	int method;			/* one of HTTP_AUTH_* */
 	struct chunk method_data;	/* points to the creditial part from 'Authorization:' header */
 	char *user, *pass;		/* extracted username & password */
 };

 struct http_req_rule {
 	struct list list;
 	struct acl_cond *cond;			/* acl condition to meet */
 	unsigned int action;
 	struct {
 		char *realm;
 	} http_auth;
 };

 /* This is an HTTP transaction. It contains both a request message and a
  * response message (which can be empty).
  */
 struct http_txn {
 	struct http_msg req;            /* HTTP request message */
 	struct hdr_idx hdr_idx;         /* array of header indexes (max: global.tune.max_http_hdr) */
 	unsigned int flags;             /* transaction flags */
 	http_meth_t meth;               /* HTTP method */

 	int status;                     /* HTTP status from the server, negative if from proxy */
 	struct http_msg rsp;            /* HTTP response message */

 	char *uri;                      /* first line if log needed, NULL otherwise */
 	char *cli_cookie;               /* cookie presented by the client, in capture mode */
 	char *srv_cookie;               /* cookie presented by the server, in capture mode */
 	char *sessid;                   /* the appsession id, if found in the request or in the response */
 	int cookie_first_date;          /* if non-zero, first date the expirable cookie was set/seen */
 	int cookie_last_date;           /* if non-zero, last date the expirable cookie was set/seen */

 	struct http_auth_data auth;	/* HTTP auth data */
 };

 /* This structure is used by http_find_header() to return values of headers.
  * The header starts at <line>, the value (excluding leading and trailing white
  * spaces) at <line>+<val> for <vlen> bytes, followed by optional <tws> trailing
  * white spaces, and sets <line>+<del> to point to the last delimitor (colon or
  * comma) before this value. <prev> points to the index of the header whose next
  * is this one.
  */
 struct hdr_ctx {
 	char *line;
 	int  idx;
 	int  val;  /* relative to line, may skip some leading white spaces */
 	int  vlen; /* relative to line+val, stops before trailing white spaces */
 	int  tws;  /* added to vlen if some trailing white spaces are present */
 	int  del;  /* relative to line */
 	int  prev; /* index of previous header */
 };

 #endif /* _TYPES_PROTO_HTTP_H */

 /*
  * Local variables:
  *  c-indent-level: 8
  *  c-basic-offset: 8
  * End:
  */
	/*
	* include/types/proto_http.h
	* This file contains HTTP protocol definitions.
	*
	* Copyright (C) 2000-2011 Willy Tarreau - w@1wt.eu
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation, version 2.1
	* exclusively.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#ifndef _TYPES_PROTO_HTTP_H
	#define _TYPES_PROTO_HTTP_H

	#include <common/config.h>

	#include <types/buffers.h>
	#include <types/hdr_idx.h>

	/* These are the flags that are found in txn->flags */

	/* action flags */
	#define TX_CLDENY 0x00000001 /* a client header matches a deny regex */
	#define TX_CLALLOW 0x00000002 /* a client header matches an allow regex */
	#define TX_SVDENY 0x00000004 /* a server header matches a deny regex */
	#define TX_SVALLOW 0x00000008 /* a server header matches an allow regex */
	#define TX_CLTARPIT 0x00000010 /* the session is tarpitted (anti-dos) */

	/* transaction flags dedicated to cookies : bits values 0x20 to 0x80 (0-7 shift 5) */
	#define TX_CK_NONE 0x00000000 /* this session had no cookie */
	#define TX_CK_INVALID 0x00000020 /* this session had a cookie which matches no server */
	#define TX_CK_DOWN 0x00000040 /* this session had cookie matching a down server */
	#define TX_CK_VALID 0x00000060 /* this session had cookie matching a valid server */
	#define TX_CK_EXPIRED 0x00000080 /* this session had an expired cookie (idle for too long) */
	#define TX_CK_OLD 0x000000A0 /* this session had too old a cookie (offered too long ago) */
	#define TX_CK_MASK 0x000000E0 /* mask to get this session's cookie flags */
	#define TX_CK_SHIFT 5 /* bit shift */

	/* response cookie information, bits values 0x100 to 0x700 (0-7 shift 8) */
	#define TX_SCK_NONE 0x00000000 /* no cookie found in the response */
	#define TX_SCK_FOUND 0x00000100 /* a persistence cookie was found and forwarded */
	#define TX_SCK_DELETED 0x00000200 /* an existing persistence cookie was deleted */
	#define TX_SCK_INSERTED 0x00000300 /* a persistence cookie was inserted */
	#define TX_SCK_REPLACED 0x00000400 /* a persistence cookie was present and rewritten */
	#define TX_SCK_UPDATED 0x00000500 /* an expirable persistence cookie was updated */
	#define TX_SCK_MASK 0x00000700 /* mask to get the set-cookie field */
	#define TX_SCK_SHIFT 8 /* bit shift */

	#define TX_SCK_PRESENT 0x00000800 /* a cookie was found in the server's response */

	/* cacheability management, bits values 0x1000 to 0x3000 (0-3 shift 12) */
	#define TX_CACHEABLE 0x00001000 /* at least part of the response is cacheable */
	#define TX_CACHE_COOK 0x00002000 /* a cookie in the response is cacheable */
	#define TX_CACHE_SHIFT 12 /* bit shift */

	/* request and response HTTP version */
	#define TX_REQ_VER_11 0x00004000 /* the request is HTTP/1.1 or above */
	#define TX_RES_VER_11 0x00008000 /* the response is HTTP/1.1 or above */

	/* report presence of transfer-encoding:chunked and content-length headers */
	#define TX_REQ_CNT_LEN 0x00010000 /* content-length present in the request */
	#define TX_REQ_TE_CHNK 0x00020000 /* transfer-encoding: chunked present in the request */
	#define TX_RES_CNT_LEN 0x00040000 /* content-length present in the response */
	#define TX_RES_TE_CHNK 0x00080000 /* transfer-encoding: chunked present in the response */

	/* indicate how we want the connection to behave, regardless of what is in
	* the headers. We have 4 possible values right now :
	* - WANT_TUN : will be a tunnel (default when nothing configured or with CONNECT).
	* - WANT_KAL : try to maintain keep-alive
	* - WANT_SCL : enforce close on the server side
	* - WANT_CLO : enforce close on both sides
	*/
	#define TX_CON_WANT_TUN 0x00000000 /* note: it's important that it is 0 (init) */
	#define TX_CON_WANT_KAL 0x00100000
	#define TX_CON_WANT_SCL 0x00200000
	#define TX_CON_WANT_CLO 0x00300000
	#define TX_CON_WANT_MSK 0x00300000 /* this is the mask to get the bits */

	#define TX_CON_CLO_SET 0x00400000 /* "connection: close" is now set */
	#define TX_CON_KAL_SET 0x00800000 /* "connection: keep-alive" is now set */

	/* if either of these flags is not set, we may be forced to complete an
	* connection as a half-way tunnel. For instance, if no content-length
	* appears in a 1.1 response, but the request is correctly sized.
	*/
	#define TX_REQ_XFER_LEN 0x01000000 /* request xfer size can be determined */
	#define TX_RES_XFER_LEN 0x02000000 /* response xfer size can be determined */
	#define TX_WAIT_NEXT_RQ 0x04000000 /* waiting for the second request to start, use keep-alive timeout */

	#define TX_HDR_CONN_PRS 0x08000000 /* "connection" header already parsed (req or res), results below */
	#define TX_HDR_CONN_CLO 0x10000000 /* "Connection: close" was present at least once */
	#define TX_HDR_CONN_KAL 0x20000000 /* "Connection: keep-alive" was present at least once */
	#define TX_USE_PX_CONN 0x40000000 /* Use "Proxy-Connection" instead of "Connection" */

	/* used only for keep-alive purposes, to indicate we're on a second transaction */
	#define TX_NOT_FIRST 0x80000000 /* the transaction is not the first one */
	/* no more room for transaction flags ! */

	/* The HTTP parser is more complex than it looks like, because we have to
	* support multi-line headers and any number of spaces between the colon and
	* the value.
	*
	* All those examples must work :

	Hdr1:val1\r\n
	Hdr1: val1\r\n
	Hdr1:\t val1\r\n
	Hdr1: \r\n
	val1\r\n
	Hdr1:\r\n
	val1\n
	\tval2\r\n
	val3\n

	*
	*/

	/* Possible states while parsing HTTP messages (request\|response) */
	#define HTTP_MSG_RQBEFORE 0 // request: leading LF, before start line
	#define HTTP_MSG_RQBEFORE_CR 1 // request: leading CRLF, before start line

	/* these ones define a request start line */
	#define HTTP_MSG_RQMETH 2 // parsing the Method
	#define HTTP_MSG_RQMETH_SP 3 // space(s) after the ethod
	#define HTTP_MSG_RQURI 4 // parsing the Request URI
	#define HTTP_MSG_RQURI_SP 5 // space(s) after the Request URI
	#define HTTP_MSG_RQVER 6 // parsing the Request Version
	#define HTTP_MSG_RQLINE_END 7 // end of request line (CR or LF)

	#define HTTP_MSG_RPBEFORE 8 // response: leading LF, before start line
	#define HTTP_MSG_RPBEFORE_CR 9 // response: leading CRLF, before start line

	/* these ones define a response start line */
	#define HTTP_MSG_RPVER 10 // parsing the Response Version
	#define HTTP_MSG_RPVER_SP 11 // space(s) after the Response Version
	#define HTTP_MSG_RPCODE 12 // response code
	#define HTTP_MSG_RPCODE_SP 13 // space(s) after the response code
	#define HTTP_MSG_RPREASON 14 // response reason
	#define HTTP_MSG_RPLINE_END 15 // end of response line (CR or LF)

	/* common header processing */

	#define HTTP_MSG_HDR_FIRST 16 // waiting for first header or last CRLF (no LWS possible)
	#define HTTP_MSG_HDR_NAME 17 // parsing header name
	#define HTTP_MSG_HDR_COL 18 // parsing header colon
	#define HTTP_MSG_HDR_L1_SP 19 // parsing header LWS (SP\|HT) before value
	#define HTTP_MSG_HDR_L1_LF 20 // parsing header LWS (LF) before value
	#define HTTP_MSG_HDR_L1_LWS 21 // checking whether it's a new header or an LWS
	#define HTTP_MSG_HDR_VAL 22 // parsing header value
	#define HTTP_MSG_HDR_L2_LF 23 // parsing header LWS (LF) inside/after value
	#define HTTP_MSG_HDR_L2_LWS 24 // checking whether it's a new header or an LWS

	#define HTTP_MSG_LAST_LF 25 // parsing last LF

	/* error state : must be before HTTP_MSG_BODY so that (>=BODY) always indicates
	* that data are being processed.
	*/

	#define HTTP_MSG_ERROR 26 // an error occurred

	/* Body processing.
	* The state HTTP_MSG_BODY is a delimiter to know if we're waiting for headers
	* or body. All the sub-states below also indicate we're processing the body,
	* with some additional information.
	*/
	#define HTTP_MSG_BODY 27 // parsing body at end of headers
	#define HTTP_MSG_100_SENT 28 // parsing body after a 100-Continue was sent
	#define HTTP_MSG_CHUNK_SIZE 29 // parsing the chunk size (RFC2616 #3.6.1)
	#define HTTP_MSG_DATA 30 // skipping data chunk / content-length data
	#define HTTP_MSG_DATA_CRLF 31 // skipping CRLF after data chunk
	#define HTTP_MSG_TRAILERS 32 // trailers (post-data entity headers)

	/* we enter this state when we've received the end of the current message */
	#define HTTP_MSG_DONE 33 // message end received, waiting for resync or close
	#define HTTP_MSG_CLOSING 34 // shutdown_w done, not all bytes sent yet
	#define HTTP_MSG_CLOSED 35 // shutdown_w done, all bytes sent
	#define HTTP_MSG_TUNNEL 36 // tunneled data after DONE

	/* Redirect flags */
	enum {
	REDIRECT_FLAG_NONE = 0,
	REDIRECT_FLAG_DROP_QS = 1, /* drop query string */
	REDIRECT_FLAG_APPEND_SLASH = 2, /* append a slash if missing at the end */
	};

	/* Redirect types (location, prefix, extended ) */
	enum {
	REDIRECT_TYPE_NONE = 0, /* no redirection */
	REDIRECT_TYPE_LOCATION, /* location redirect */
	REDIRECT_TYPE_PREFIX, /* prefix redirect */
	};

	/* Perist types (force-persist, ignore-persist) */
	enum {
	PERSIST_TYPE_NONE = 0, /* no persistence */
	PERSIST_TYPE_FORCE, /* force-persist */
	PERSIST_TYPE_IGNORE, /* ignore-persist */
	};

	/* Known HTTP methods */
	typedef enum {
	HTTP_METH_NONE = 0,
	HTTP_METH_OPTIONS,
	HTTP_METH_GET,
	HTTP_METH_HEAD,
	HTTP_METH_POST,
	HTTP_METH_PUT,
	HTTP_METH_DELETE,
	HTTP_METH_TRACE,
	HTTP_METH_CONNECT,
	HTTP_METH_OTHER,
	} http_meth_t;

	enum {
	HTTP_AUTH_WRONG = -1, /* missing or unknown */
	HTTP_AUTH_UNKNOWN = 0,
	HTTP_AUTH_BASIC,
	HTTP_AUTH_DIGEST,
	};

	enum {
	HTTP_REQ_ACT_UNKNOWN = 0,
	HTTP_REQ_ACT_ALLOW,
	HTTP_REQ_ACT_DENY,
	HTTP_REQ_ACT_HTTP_AUTH,
	HTTP_REQ_ACT_MAX
	};

	/*
	* All implemented return codes
	*/
	enum {
	HTTP_ERR_200 = 0,
	HTTP_ERR_400,
	HTTP_ERR_403,
	HTTP_ERR_408,
	HTTP_ERR_500,
	HTTP_ERR_502,
	HTTP_ERR_503,
	HTTP_ERR_504,
	HTTP_ERR_SIZE
	};

	/* This is an HTTP message, as described in RFC2616. It can be either a request
	* message or a response message.
	*
	* The values there are a little bit obscure, because their meaning can change
	* during the parsing :
	*
	* - som (Start of Message) : relative offset in the buffer of first byte of
	* the request being processed or parsed. Reset to
	* zero during accept(), and changes while parsing
	* chunks.
	* - eoh (End of Headers) : relative offset in the buffer of first byte that
	* is not part of a completely processed header.
	* During parsing, it points to last header seen
	* for states after START. When in HTTP_MSG_BODY,
	* eoh points to the first byte of the last CRLF
	* preceeding data.
	* - col and sov : When in HTTP_MSG_BODY, will point to the first
	* byte of data (relative to buffer).
	* - sol (start of line) : start of line, also start of message when fully parsed.
	* - eol (End of Line) : relative offset in the buffer of the first byte
	* which marks the end of the line (LF or CRLF).
	* Note that all offsets are relative to the beginning of the buffer. To get
	* them relative to the current request, subtract ->som or ->sol.
	*/
	struct http_msg {
	unsigned int msg_state; /* where we are in the current message parsing */
	unsigned int col, sov; /* current header: colon, start of value */
	unsigned int eoh; /* End Of Headers, relative to buffer */
	char sol; / start of line, also start of message when fully parsed */
	char eol; / end of line */
	unsigned int som; /* Start Of Message, relative to buffer */
	int err_pos; /* err handling: -2=block, -1=pass, 0+=detected */
	union { /* useful start line pointers, relative to ->sol */
	struct {
	int l; /* request line length (not including CR) */
	int m_l; /* METHOD length (method starts at ->som) */
	int u, u_l; /* URI, length */
	int v, v_l; /* VERSION, length */
	} rq; /* request line : field, length */
	struct {
	int l; /* status line length (not including CR) */
	int v_l; /* VERSION length (version starts at ->som) */
	int c, c_l; /* CODE, length */
	int r, r_l; /* REASON, length */
	} st; /* status line : field, length */
	} sl; /* start line */
	unsigned long long chunk_len; /* cache for last chunk size or content-length header value */
	unsigned long long body_len; /* total known length of the body, excluding encoding */
	char *cap; / array of captured headers (may be NULL) */
	};

	struct http_auth_data {
	int method; /* one of HTTP_AUTH_* */
	struct chunk method_data; /* points to the creditial part from 'Authorization:' header */
	char user, pass; /* extracted username & password */
	};

	struct http_req_rule {
	struct list list;
	struct acl_cond cond; / acl condition to meet */
	unsigned int action;
	struct {
	char *realm;
	} http_auth;
	};

	/* This is an HTTP transaction. It contains both a request message and a
	* response message (which can be empty).
	*/
	struct http_txn {
	struct http_msg req; /* HTTP request message */
	struct hdr_idx hdr_idx; /* array of header indexes (max: global.tune.max_http_hdr) */
	unsigned int flags; /* transaction flags */
	http_meth_t meth; /* HTTP method */

	int status; /* HTTP status from the server, negative if from proxy */
	struct http_msg rsp; /* HTTP response message */

	char uri; / first line if log needed, NULL otherwise */
	char cli_cookie; / cookie presented by the client, in capture mode */
	char srv_cookie; / cookie presented by the server, in capture mode */
	char sessid; / the appsession id, if found in the request or in the response */
	int cookie_first_date; /* if non-zero, first date the expirable cookie was set/seen */
	int cookie_last_date; /* if non-zero, last date the expirable cookie was set/seen */

	struct http_auth_data auth; /* HTTP auth data */
	};

	/* This structure is used by http_find_header() to return values of headers.
	* The header starts at <line>, the value (excluding leading and trailing white
	* spaces) at <line>+<val> for <vlen> bytes, followed by optional <tws> trailing
	* white spaces, and sets <line>+<del> to point to the last delimitor (colon or
	* comma) before this value. <prev> points to the index of the header whose next
	* is this one.
	*/
	struct hdr_ctx {
	char *line;
	int idx;
	int val; /* relative to line, may skip some leading white spaces */
	int vlen; /* relative to line+val, stops before trailing white spaces */
	int tws; /* added to vlen if some trailing white spaces are present */
	int del; /* relative to line */
	int prev; /* index of previous header */
	};

	#endif /* _TYPES_PROTO_HTTP_H */

	/*
	* Local variables:
	* c-indent-level: 8
	* c-basic-offset: 8
	* End:
	*/