[thirdparty/cups.git] / cups / http.h

/*
 * "$Id: http.h 6187 2007-01-10 16:20:42Z mike $"
 *
 *   Hyper-Text Transport Protocol definitions for the Common UNIX Printing
 *   System (CUPS).
 *
 *   Copyright 1997-2007 by Easy Software Products, all rights reserved.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Easy Software Products and are protected by Federal
 *   copyright law.  Distribution and use rights are outlined in the file
 *   "LICENSE.txt" which should have been included with this file.  If this
 *   file is missing or damaged please contact Easy Software Products
 *   at:
 *
 *       Attn: CUPS Licensing Information
 *       Easy Software Products
 *       44141 Airport View Drive, Suite 204
 *       Hollywood, Maryland 20636 USA
 *
 *       Voice: (301) 373-9600
 *       EMail: cups-info@cups.org
 *         WWW: http://www.cups.org
 *
 *   This file is subject to the Apple OS-Developed Software exception.
 */

#ifndef _CUPS_HTTP_H_
#  define _CUPS_HTTP_H_

/*
 * Include necessary headers...
 */

#  include <string.h>
#  include <time.h>
#  include <sys/types.h>
#  ifdef WIN32
#    ifndef __CUPS_SSIZE_T_DEFINED
#      define __CUPS_SSIZE_T_DEFINED
/* Windows does not support the ssize_t type, so map it to off_t... */
typedef off_t ssize_t;			/* @private@ */
#    endif /* !__CUPS_SSIZE_T_DEFINED */
#    include <winsock2.h>
#    include <ws2tcpip.h>
#  else
#    ifdef __sgi
#      define INET6			/* IRIX IPv6 support... */
#    endif /* __sgi */
#    include <unistd.h>
#    include <sys/time.h>
#    include <sys/socket.h>
#    include <netdb.h>
#    include <netinet/in.h>
#    include <arpa/inet.h>
#    include <netinet/in_systm.h>
#    include <netinet/ip.h>
#    if !defined(__APPLE__) || !defined(TCP_NODELAY)
#      include <netinet/tcp.h>
#    endif /* !__APPLE__ || !TCP_NODELAY */
#    if defined(AF_UNIX) && !defined(AF_LOCAL)
#      define AF_LOCAL AF_UNIX		/* Older UNIX's have old names... */
#    endif /* AF_UNIX && !AF_LOCAL */
#    ifdef AF_LOCAL
#      include <sys/un.h>
#    endif /* AF_LOCAL */
#  endif /* WIN32 */

/*
 * With GCC 3.0 and higher, we can mark old APIs "deprecated" so you get
 * a warning at compile-time.
 */

#  if defined(__GNUC__) && __GNUC__ > 2
#    define _HTTP_DEPRECATED __attribute__ ((__deprecated__))
#  else
#    define _HTTP_DEPRECATED
#  endif /* __GNUC__ && __GNUC__ > 2 */


/*
 * C++ magic...
 */

#  ifdef __cplusplus
extern "C" {
#  endif /* __cplusplus */


/*
 * Oh, the wonderful world of IPv6 compatibility.  Apparently some
 * implementations expose the (more logical) 32-bit address parts
 * to everyone, while others only expose it to kernel code...  To
 * make supporting IPv6 even easier, each vendor chose different
 * core structure and union names, so the same defines or code
 * can't be used on all platforms.
 *
 * The following will likely need tweaking on new platforms that
 * support IPv6 - the "s6_addr32" define maps to the 32-bit integer
 * array in the in6_addr union, which is named differently on various
 * platforms.
 */

#if defined(AF_INET6) && !defined(s6_addr32)
#  if defined(__sun)
#    define s6_addr32	_S6_un._S6_u32
#  elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
#    define s6_addr32	__u6_addr.__u6_addr32
#  elif defined(__osf__)
#    define s6_addr32	s6_un.sa6_laddr
#  elif defined(WIN32)
/*
 * Windows only defines byte and 16-bit word members of the union and
 * requires special casing of all raw address code...
 */
#    define s6_addr32	error_need_win32_specific_code
#  endif /* __sun */
#endif /* AF_INET6 && !s6_addr32 */


/*
 * Limits...
 */

#  define HTTP_MAX_URI		1024	/* Max length of URI string */
#  define HTTP_MAX_HOST		256	/* Max length of hostname string */
#  define HTTP_MAX_BUFFER	2048	/* Max length of data buffer */
#  define HTTP_MAX_VALUE	256	/* Max header field value length */


/*
 * Types and structures...
 */

typedef enum http_auth_e		/**** HTTP authentication types ****/
{
  HTTP_AUTH_NONE,			/* No authentication in use */
  HTTP_AUTH_BASIC,			/* Basic authentication in use */
  HTTP_AUTH_MD5,			/* Digest authentication in use */
  HTTP_AUTH_MD5_SESS,			/* MD5-session authentication in use */
  HTTP_AUTH_MD5_INT,			/* Digest authentication in use for body */
  HTTP_AUTH_MD5_SESS_INT,		/* MD5-session authentication in use for body */
  HTTP_AUTH_NEGOTIATE			/* GSSAPI authentication in use @since CUPS 1.3@ */
} http_auth_t;

typedef enum http_encoding_e		/**** HTTP transfer encoding values ****/
{
  HTTP_ENCODE_LENGTH,			/* Data is sent with Content-Length */
  HTTP_ENCODE_CHUNKED,			/* Data is chunked */
  HTTP_ENCODE_FIELDS			/* Sending HTTP fields */
} http_encoding_t;

typedef enum http_encryption_e		/**** HTTP encryption values ****/
{
  HTTP_ENCRYPT_IF_REQUESTED,		/* Encrypt if requested (TLS upgrade) */
  HTTP_ENCRYPT_NEVER,			/* Never encrypt */
  HTTP_ENCRYPT_REQUIRED,		/* Encryption is required (TLS upgrade) */
  HTTP_ENCRYPT_ALWAYS			/* Always encrypt (SSL) */
} http_encryption_t;

typedef enum http_field_e		/**** HTTP field names ****/
{
  HTTP_FIELD_UNKNOWN = -1,		/* Unknown field */
  HTTP_FIELD_ACCEPT_LANGUAGE,		/* Accept-Language field */
  HTTP_FIELD_ACCEPT_RANGES,		/* Accept-Ranges field */
  HTTP_FIELD_AUTHORIZATION,		/* Authorization field */
  HTTP_FIELD_CONNECTION,		/* Connection field */
  HTTP_FIELD_CONTENT_ENCODING,		/* Content-Encoding field */
  HTTP_FIELD_CONTENT_LANGUAGE,		/* Content-Language field */
  HTTP_FIELD_CONTENT_LENGTH,		/* Content-Length field */
  HTTP_FIELD_CONTENT_LOCATION,		/* Content-Location field */
  HTTP_FIELD_CONTENT_MD5,		/* Content-MD5 field */
  HTTP_FIELD_CONTENT_RANGE,		/* Content-Range field */
  HTTP_FIELD_CONTENT_TYPE,		/* Content-Type field */
  HTTP_FIELD_CONTENT_VERSION,		/* Content-Version field */
  HTTP_FIELD_DATE,			/* Date field */
  HTTP_FIELD_HOST,			/* Host field */
  HTTP_FIELD_IF_MODIFIED_SINCE,		/* If-Modified-Since field */
  HTTP_FIELD_IF_UNMODIFIED_SINCE,	/* If-Unmodified-Since field */
  HTTP_FIELD_KEEP_ALIVE,		/* Keep-Alive field */
  HTTP_FIELD_LAST_MODIFIED,		/* Last-Modified field */
  HTTP_FIELD_LINK,			/* Link field */
  HTTP_FIELD_LOCATION,			/* Location field */
  HTTP_FIELD_RANGE,			/* Range field */
  HTTP_FIELD_REFERER,			/* Referer field */
  HTTP_FIELD_RETRY_AFTER,		/* Retry-After field */
  HTTP_FIELD_TRANSFER_ENCODING,		/* Transfer-Encoding field */
  HTTP_FIELD_UPGRADE,			/* Upgrade field */
  HTTP_FIELD_USER_AGENT,		/* User-Agent field */
  HTTP_FIELD_WWW_AUTHENTICATE,		/* WWW-Authenticate field */
  HTTP_FIELD_MAX			/* Maximum field index */
} http_field_t;

typedef enum http_keepalive_e		/**** HTTP keep-alive values ****/
{
  HTTP_KEEPALIVE_OFF = 0,		/* No keep alive support */
  HTTP_KEEPALIVE_ON			/* Use keep alive */
} http_keepalive_t;

typedef enum http_state_e		/**** HTTP state values; states
					 **** are server-oriented...
					 ****/
{
  HTTP_WAITING,				/* Waiting for command */
  HTTP_OPTIONS,				/* OPTIONS command, waiting for blank line */
  HTTP_GET,				/* GET command, waiting for blank line */
  HTTP_GET_SEND,			/* GET command, sending data */
  HTTP_HEAD,				/* HEAD command, waiting for blank line */
  HTTP_POST,				/* POST command, waiting for blank line */
  HTTP_POST_RECV,			/* POST command, receiving data */
  HTTP_POST_SEND,			/* POST command, sending data */
  HTTP_PUT,				/* PUT command, waiting for blank line */
  HTTP_PUT_RECV,			/* PUT command, receiving data */
  HTTP_DELETE,				/* DELETE command, waiting for blank line */
  HTTP_TRACE,				/* TRACE command, waiting for blank line */
  HTTP_CLOSE,				/* CLOSE command, waiting for blank line */
  HTTP_STATUS				/* Command complete, sending status */
} http_state_t;

typedef enum http_status_e		/**** HTTP status codes ****/
{
  HTTP_ERROR = -1,			/* An error response from httpXxxx() */

  HTTP_CONTINUE = 100,			/* Everything OK, keep going... */
  HTTP_SWITCHING_PROTOCOLS,		/* HTTP upgrade to TLS/SSL */

  HTTP_OK = 200,			/* OPTIONS/GET/HEAD/POST/TRACE command was successful */
  HTTP_CREATED,				/* PUT command was successful */
  HTTP_ACCEPTED,			/* DELETE command was successful */
  HTTP_NOT_AUTHORITATIVE,		/* Information isn't authoritative */
  HTTP_NO_CONTENT,			/* Successful command, no new data */
  HTTP_RESET_CONTENT,			/* Content was reset/recreated */
  HTTP_PARTIAL_CONTENT,			/* Only a partial file was recieved/sent */

  HTTP_MULTIPLE_CHOICES = 300,		/* Multiple files match request */
  HTTP_MOVED_PERMANENTLY,		/* Document has moved permanently */
  HTTP_MOVED_TEMPORARILY,		/* Document has moved temporarily */
  HTTP_SEE_OTHER,			/* See this other link... */
  HTTP_NOT_MODIFIED,			/* File not modified */
  HTTP_USE_PROXY,			/* Must use a proxy to access this URI */

  HTTP_BAD_REQUEST = 400,		/* Bad request */
  HTTP_UNAUTHORIZED,			/* Unauthorized to access host */
  HTTP_PAYMENT_REQUIRED,		/* Payment required */
  HTTP_FORBIDDEN,			/* Forbidden to access this URI */
  HTTP_NOT_FOUND,			/* URI was not found */
  HTTP_METHOD_NOT_ALLOWED,		/* Method is not allowed */
  HTTP_NOT_ACCEPTABLE,			/* Not Acceptable */
  HTTP_PROXY_AUTHENTICATION,		/* Proxy Authentication is Required */
  HTTP_REQUEST_TIMEOUT,			/* Request timed out */
  HTTP_CONFLICT,			/* Request is self-conflicting */
  HTTP_GONE,				/* Server has gone away */
  HTTP_LENGTH_REQUIRED,			/* A content length or encoding is required */
  HTTP_PRECONDITION,			/* Precondition failed */
  HTTP_REQUEST_TOO_LARGE,		/* Request entity too large */
  HTTP_URI_TOO_LONG,			/* URI too long */
  HTTP_UNSUPPORTED_MEDIATYPE,		/* The requested media type is unsupported */
  HTTP_REQUESTED_RANGE,			/* The requested range is not satisfiable */
  HTTP_EXPECTATION_FAILED,		/* The expectation given in an Expect header field was not met */
  HTTP_UPGRADE_REQUIRED = 426,		/* Upgrade to SSL/TLS required */

  HTTP_SERVER_ERROR = 500,		/* Internal server error */
  HTTP_NOT_IMPLEMENTED,			/* Feature not implemented */
  HTTP_BAD_GATEWAY,			/* Bad gateway */
  HTTP_SERVICE_UNAVAILABLE,		/* Service is unavailable */
  HTTP_GATEWAY_TIMEOUT,			/* Gateway connection timed out */
  HTTP_NOT_SUPPORTED			/* HTTP version not supported */
} http_status_t;

typedef enum http_uri_status_e		/**** URI separation status @since CUPS1.2@ ****/
{
  HTTP_URI_OVERFLOW = -8,		/* URI buffer for httpAssembleURI is too small */
  HTTP_URI_BAD_ARGUMENTS = -7,		/* Bad arguments to function (error) */
  HTTP_URI_BAD_RESOURCE = -6,		/* Bad resource in URI (error) */
  HTTP_URI_BAD_PORT = -5,		/* Bad port number in URI (error) */
  HTTP_URI_BAD_HOSTNAME = -4,		/* Bad hostname in URI (error) */
  HTTP_URI_BAD_USERNAME = -3,		/* Bad username in URI (error) */
  HTTP_URI_BAD_SCHEME = -2,		/* Bad scheme in URI (error) */
  HTTP_URI_BAD_URI = -1,		/* Bad/empty URI (error) */
  HTTP_URI_OK = 0,			/* URI decoded OK */
  HTTP_URI_MISSING_SCHEME,		/* Missing scheme in URI (warning) */
  HTTP_URI_UNKNOWN_SCHEME,		/* Unknown scheme in URI (warning) */
  HTTP_URI_MISSING_RESOURCE		/* Missing resource in URI (warning) */
} http_uri_status_t;

typedef enum http_uri_coding_e		/**** URI en/decode flags ****/
{
  HTTP_URI_CODING_NONE = 0,		/* Don't en/decode anything */
  HTTP_URI_CODING_USERNAME = 1,		/* En/decode the username portion */
  HTTP_URI_CODING_HOSTNAME = 2,		/* En/decode the hostname portion */
  HTTP_URI_CODING_RESOURCE = 4,		/* En/decode the resource portion */
  HTTP_URI_CODING_MOST = 7,		/* En/decode all but the query */
  HTTP_URI_CODING_QUERY = 8,		/* En/decode the query portion */
  HTTP_URI_CODING_ALL = 15		/* En/decode everything */
} http_uri_coding_t;

typedef enum http_version_e		/**** HTTP version numbers ****/
{
  HTTP_0_9 = 9,				/* HTTP/0.9 */
  HTTP_1_0 = 100,			/* HTTP/1.0 */
  HTTP_1_1 = 101			/* HTTP/1.1 */
} http_version_t;

typedef union _http_addr_u		/**** Socket address union, which
					 **** makes using IPv6 and other
					 **** address types easier and
					 **** more portable. @since CUPS 1.2@
					 ****/
{
  struct sockaddr	addr;		/* Base structure for family value */
  struct sockaddr_in	ipv4;		/* IPv4 address */
#ifdef AF_INET6
  struct sockaddr_in6	ipv6;		/* IPv6 address */
#endif /* AF_INET6 */
#ifdef AF_LOCAL
  struct sockaddr_un	un;		/* Domain socket file */
#endif /* AF_LOCAL */
  char			pad[256];	/* Padding to ensure binary compatibility */
} http_addr_t;

typedef struct http_addrlist_s		/**** Socket address list, which is
					 **** used to enumerate all of the
					 **** addresses that are associated
					 **** with a hostname. @since CUPS 1.2@
					 ****/
{
  struct http_addrlist_s *next;		/* Pointer to next address in list */
  http_addr_t		addr;		/* Address */
} http_addrlist_t;

typedef struct _http_s http_t;		/**** HTTP connection type ****/


/*
 * Prototypes...
 */

extern void		httpBlocking(http_t *http, int b);
extern int		httpCheck(http_t *http);
extern void		httpClearFields(http_t *http);
extern void		httpClose(http_t *http);
extern http_t		*httpConnect(const char *host, int port);
extern http_t		*httpConnectEncrypt(const char *host, int port,
			                    http_encryption_t encryption);
extern int		httpDelete(http_t *http, const char *uri);
extern int		httpEncryption(http_t *http, http_encryption_t e);
extern int		httpError(http_t *http);
extern void		httpFlush(http_t *http);
extern int		httpGet(http_t *http, const char *uri);
extern char		*httpGets(char *line, int length, http_t *http);
extern const char	*httpGetDateString(time_t t);
extern time_t		httpGetDateTime(const char *s);
extern const char	*httpGetField(http_t *http, http_field_t field);
extern struct hostent	*httpGetHostByName(const char *name);
extern char		*httpGetSubField(http_t *http, http_field_t field,
			                 const char *name, char *value);
extern int		httpHead(http_t *http, const char *uri);
extern void		httpInitialize(void);
extern int		httpOptions(http_t *http, const char *uri);
extern int		httpPost(http_t *http, const char *uri);
extern int		httpPrintf(http_t *http, const char *format, ...)
#  ifdef __GNUC__
__attribute__ ((__format__ (__printf__, 2, 3)))
#  endif /* __GNUC__ */
;
extern int		httpPut(http_t *http, const char *uri);
extern int		httpRead(http_t *http, char *buffer, int length) _HTTP_DEPRECATED;
extern int		httpReconnect(http_t *http);
extern void		httpSeparate(const char *uri, char *method,
			             char *username, char *host, int *port,
				     char *resource) _HTTP_DEPRECATED;
extern void		httpSetField(http_t *http, http_field_t field,
			             const char *value);
extern const char	*httpStatus(http_status_t status);
extern int		httpTrace(http_t *http, const char *uri);
extern http_status_t	httpUpdate(http_t *http);
extern int		httpWrite(http_t *http, const char *buffer, int length) _HTTP_DEPRECATED;
extern char		*httpEncode64(char *out, const char *in) _HTTP_DEPRECATED;
extern char		*httpDecode64(char *out, const char *in) _HTTP_DEPRECATED;
extern int		httpGetLength(http_t *http) _HTTP_DEPRECATED;
extern char		*httpMD5(const char *, const char *, const char *,
			         char [33]);
extern char		*httpMD5Final(const char *, const char *, const char *,
			              char [33]);
extern char		*httpMD5String(const unsigned char *, char [33]);

/**** New in CUPS 1.1.19 ****/
extern void		httpClearCookie(http_t *http);
extern const char	*httpGetCookie(http_t *http);
extern void		httpSetCookie(http_t *http, const char *cookie);
extern int		httpWait(http_t *http, int msec);

/**** New in CUPS 1.1.21 ****/
extern char		*httpDecode64_2(char *out, int *outlen, const char *in);
extern char		*httpEncode64_2(char *out, int outlen, const char *in,
			                int inlen);
extern void		httpSeparate2(const char *uri,
			              char *method, int methodlen,
			              char *username, int usernamelen,
				      char *host, int hostlen, int *port,
				      char *resource, int resourcelen) _HTTP_DEPRECATED;

/**** New in CUPS 1.2 ****/
extern int		httpAddrAny(const http_addr_t *addr);
extern http_addrlist_t	*httpAddrConnect(http_addrlist_t *addrlist, int *sock);
extern int		httpAddrEqual(const http_addr_t *addr1,
			              const http_addr_t *addr2);
extern void		httpAddrFreeList(http_addrlist_t *addrlist);
extern http_addrlist_t	*httpAddrGetList(const char *hostname, int family,
			                 const char *service);
extern int		httpAddrLength(const http_addr_t *addr);
extern int		httpAddrLocalhost(const http_addr_t *addr);
extern char		*httpAddrLookup(const http_addr_t *addr,
                                        char *name, int namelen);
extern char		*httpAddrString(const http_addr_t *addr,
			                char *s, int slen);
extern http_uri_status_t httpAssembleURI(http_uri_coding_t encoding,
			                 char *uri, int urilen,
			        	 const char *scheme,
					 const char *username,
					 const char *host, int port,
					 const char *resource);
extern http_uri_status_t httpAssembleURIf(http_uri_coding_t encoding,
			                  char *uri, int urilen,
			        	  const char *scheme,
					  const char *username,
					  const char *host, int port,
					  const char *resourcef, ...);
extern int		httpFlushWrite(http_t *http);
extern int		httpGetBlocking(http_t *http);
extern const char	*httpGetDateString2(time_t t, char *s, int slen);
extern int		httpGetFd(http_t *http);
extern const char	*httpGetHostname(http_t *http, char *s, int slen);
extern off_t		httpGetLength2(http_t *http);
extern http_status_t	httpGetStatus(http_t *http);
extern char		*httpGetSubField2(http_t *http, http_field_t field,
			                  const char *name, char *value,
					  int valuelen);
extern ssize_t		httpRead2(http_t *http, char *buffer, size_t length);
extern http_uri_status_t httpSeparateURI(http_uri_coding_t decoding,
			                 const char *uri,
			        	 char *scheme, int schemelen,
			        	 char *username, int usernamelen,
					 char *host, int hostlen, int *port,
					 char *resource, int resourcelen);
extern void		httpSetExpect(http_t *http, http_status_t expect);
extern void		httpSetLength(http_t *http, size_t length);
extern ssize_t		httpWrite2(http_t *http, const char *buffer,
			           size_t length);


/*
 * C++ magic...
 */

#  ifdef __cplusplus
}
#  endif /* __cplusplus */
#endif /* !_CUPS_HTTP_H_ */

/*
 * End of "$Id: http.h 6187 2007-01-10 16:20:42Z mike $".
 */
Commit	Line	Data
ef416fc2	1	/*
f7deaa1a	2	* "$Id: http.h 6187 2007-01-10 16:20:42Z mike $"
ef416fc2	3	*
	4	* Hyper-Text Transport Protocol definitions for the Common UNIX Printing
	5	* System (CUPS).
	6	*
b86bc4cf	7	* Copyright 1997-2007 by Easy Software Products, all rights reserved.
ef416fc2	8	*
	9	* These coded instructions, statements, and computer programs are the
	10	* property of Easy Software Products and are protected by Federal
	11	* copyright law. Distribution and use rights are outlined in the file
	12	* "LICENSE.txt" which should have been included with this file. If this
	13	* file is missing or damaged please contact Easy Software Products
	14	* at:
	15	*
	16	* Attn: CUPS Licensing Information
	17	* Easy Software Products
	18	* 44141 Airport View Drive, Suite 204
	19	* Hollywood, Maryland 20636 USA
	20	*
	21	* Voice: (301) 373-9600
	22	* EMail: cups-info@cups.org
	23	* WWW: http://www.cups.org
	24	*
	25	* This file is subject to the Apple OS-Developed Software exception.
	26	*/
	27
	28	#ifndef _CUPS_HTTP_H_
	29	# define _CUPS_HTTP_H_
	30
	31	/*
	32	* Include necessary headers...
	33	*/
	34
	35	# include <string.h>
	36	# include <time.h>
	37	# include <sys/types.h>
	38	# ifdef WIN32
b86bc4cf	39	# ifndef __CUPS_SSIZE_T_DEFINED
	40	# define __CUPS_SSIZE_T_DEFINED
	41	/* Windows does not support the ssize_t type, so map it to off_t... */
	42	typedef off_t ssize_t; /* @private@ */
	43	# endif /* !__CUPS_SSIZE_T_DEFINED */
ef416fc2	44	# include <winsock2.h>
	45	# include <ws2tcpip.h>
	46	# else
d09495fa	47	# ifdef __sgi
d09495fa	48	# define INET6 /* IRIX IPv6 support... */
e1d6a774	49	# endif /* __sgi */
ef416fc2	50	# include <unistd.h>
	51	# include <sys/time.h>
	52	# include <sys/socket.h>
	53	# include <netdb.h>
	54	# include <netinet/in.h>
	55	# include <arpa/inet.h>
	56	# include <netinet/in_systm.h>
	57	# include <netinet/ip.h>
	58	# if !defined(__APPLE__) \|\| !defined(TCP_NODELAY)
	59	# include <netinet/tcp.h>
	60	# endif /* !__APPLE__ \|\| !TCP_NODELAY */
d09495fa	61	# if defined(AF_UNIX) && !defined(AF_LOCAL)
	62	# define AF_LOCAL AF_UNIX /* Older UNIX's have old names... */
	63	# endif /* AF_UNIX && !AF_LOCAL */
ef416fc2	64	# ifdef AF_LOCAL
	65	# include <sys/un.h>
	66	# endif /* AF_LOCAL */
	67	# endif /* WIN32 */
	68
ef416fc2	69	/*
ef416fc2	70	* With GCC 3.0 and higher, we can mark old APIs "deprecated" so you get
fa73b229	71	* a warning at compile-time.
ef416fc2	72	*/
	73
	74	# if defined(__GNUC__) && __GNUC__ > 2
	75	# define _HTTP_DEPRECATED __attribute__ ((__deprecated__))
	76	# else
	77	# define _HTTP_DEPRECATED
	78	# endif /* __GNUC__ && __GNUC__ > 2 */
	79
	80
	81	/*
	82	* C++ magic...
	83	*/
	84
	85	# ifdef __cplusplus
	86	extern "C" {
	87	# endif /* __cplusplus */
	88
	89
	90	/*
	91	* Oh, the wonderful world of IPv6 compatibility. Apparently some
	92	* implementations expose the (more logical) 32-bit address parts
	93	* to everyone, while others only expose it to kernel code... To
	94	* make supporting IPv6 even easier, each vendor chose different
	95	* core structure and union names, so the same defines or code
	96	* can't be used on all platforms.
	97	*
	98	* The following will likely need tweaking on new platforms that
	99	* support IPv6 - the "s6_addr32" define maps to the 32-bit integer
	100	* array in the in6_addr union, which is named differently on various
	101	* platforms.
	102	*/
	103
	104	#if defined(AF_INET6) && !defined(s6_addr32)
	105	# if defined(__sun)
	106	# define s6_addr32 _S6_un._S6_u32
8ca02f3c	107	# elif defined(__FreeBSD__) \|\| defined(__NetBSD__) \|\| defined(__OpenBSD__) \|\| defined(__APPLE__)
ef416fc2	108	# define s6_addr32 __u6_addr.__u6_addr32
e1d6a774	109	# elif defined(__osf__)
e1d6a774	110	# define s6_addr32 s6_un.sa6_laddr
ef416fc2	111	# elif defined(WIN32)
	112	/*
	113	* Windows only defines byte and 16-bit word members of the union and
	114	* requires special casing of all raw address code...
	115	*/
	116	# define s6_addr32 error_need_win32_specific_code
	117	# endif /* __sun */
	118	#endif /* AF_INET6 && !s6_addr32 */
	119
	120
	121	/*
	122	* Limits...
	123	*/
	124
	125	# define HTTP_MAX_URI 1024 /* Max length of URI string */
	126	# define HTTP_MAX_HOST 256 /* Max length of hostname string */
fa73b229	127	# define HTTP_MAX_BUFFER 2048 /* Max length of data buffer */
ef416fc2	128	# define HTTP_MAX_VALUE 256 /* Max header field value length */
	129
	130
	131	/*
	132	* Types and structures...
	133	*/
	134
	135	typedef enum http_auth_e /** HTTP authentication types **/
	136	{
	137	HTTP_AUTH_NONE, /* No authentication in use */
	138	HTTP_AUTH_BASIC, /* Basic authentication in use */
	139	HTTP_AUTH_MD5, /* Digest authentication in use */
	140	HTTP_AUTH_MD5_SESS, /* MD5-session authentication in use */
	141	HTTP_AUTH_MD5_INT, /* Digest authentication in use for body */
f7deaa1a	142	HTTP_AUTH_MD5_SESS_INT, /* MD5-session authentication in use for body */
f7deaa1a	143	HTTP_AUTH_NEGOTIATE /* GSSAPI authentication in use @since CUPS 1.3@ */
ef416fc2	144	} http_auth_t;
	145
	146	typedef enum http_encoding_e /** HTTP transfer encoding values **/
	147	{
	148	HTTP_ENCODE_LENGTH, /* Data is sent with Content-Length */
d09495fa	149	HTTP_ENCODE_CHUNKED, /* Data is chunked */
d09495fa	150	HTTP_ENCODE_FIELDS /* Sending HTTP fields */
ef416fc2	151	} http_encoding_t;
	152
	153	typedef enum http_encryption_e /** HTTP encryption values **/
	154	{
	155	HTTP_ENCRYPT_IF_REQUESTED, /* Encrypt if requested (TLS upgrade) */
	156	HTTP_ENCRYPT_NEVER, /* Never encrypt */
	157	HTTP_ENCRYPT_REQUIRED, /* Encryption is required (TLS upgrade) */
	158	HTTP_ENCRYPT_ALWAYS /* Always encrypt (SSL) */
	159	} http_encryption_t;
	160
	161	typedef enum http_field_e /** HTTP field names **/
	162	{
	163	HTTP_FIELD_UNKNOWN = -1, /* Unknown field */
	164	HTTP_FIELD_ACCEPT_LANGUAGE, /* Accept-Language field */
	165	HTTP_FIELD_ACCEPT_RANGES, /* Accept-Ranges field */
	166	HTTP_FIELD_AUTHORIZATION, /* Authorization field */
	167	HTTP_FIELD_CONNECTION, /* Connection field */
	168	HTTP_FIELD_CONTENT_ENCODING, /* Content-Encoding field */
	169	HTTP_FIELD_CONTENT_LANGUAGE, /* Content-Language field */
	170	HTTP_FIELD_CONTENT_LENGTH, /* Content-Length field */
	171	HTTP_FIELD_CONTENT_LOCATION, /* Content-Location field */
	172	HTTP_FIELD_CONTENT_MD5, /* Content-MD5 field */
	173	HTTP_FIELD_CONTENT_RANGE, /* Content-Range field */
	174	HTTP_FIELD_CONTENT_TYPE, /* Content-Type field */
	175	HTTP_FIELD_CONTENT_VERSION, /* Content-Version field */
	176	HTTP_FIELD_DATE, /* Date field */
	177	HTTP_FIELD_HOST, /* Host field */
	178	HTTP_FIELD_IF_MODIFIED_SINCE, /* If-Modified-Since field */
	179	HTTP_FIELD_IF_UNMODIFIED_SINCE, /* If-Unmodified-Since field */
	180	HTTP_FIELD_KEEP_ALIVE, /* Keep-Alive field */
	181	HTTP_FIELD_LAST_MODIFIED, /* Last-Modified field */
	182	HTTP_FIELD_LINK, /* Link field */
	183	HTTP_FIELD_LOCATION, /* Location field */
	184	HTTP_FIELD_RANGE, /* Range field */
	185	HTTP_FIELD_REFERER, /* Referer field */
	186	HTTP_FIELD_RETRY_AFTER, /* Retry-After field */
	187	HTTP_FIELD_TRANSFER_ENCODING, /* Transfer-Encoding field */
	188	HTTP_FIELD_UPGRADE, /* Upgrade field */
	189	HTTP_FIELD_USER_AGENT, /* User-Agent field */
	190	HTTP_FIELD_WWW_AUTHENTICATE, /* WWW-Authenticate field */
	191	HTTP_FIELD_MAX /* Maximum field index */
	192	} http_field_t;
	193
	194	typedef enum http_keepalive_e /** HTTP keep-alive values **/
	195	{
	196	HTTP_KEEPALIVE_OFF = 0, /* No keep alive support */
	197	HTTP_KEEPALIVE_ON /* Use keep alive */
	198	} http_keepalive_t;
	199
	200	typedef enum http_state_e /**** HTTP state values; states
	201	**** are server-oriented...
	202	****/
	203	{
	204	HTTP_WAITING, /* Waiting for command */
	205	HTTP_OPTIONS, /* OPTIONS command, waiting for blank line */
	206	HTTP_GET, /* GET command, waiting for blank line */
	207	HTTP_GET_SEND, /* GET command, sending data */
	208	HTTP_HEAD, /* HEAD command, waiting for blank line */
	209	HTTP_POST, /* POST command, waiting for blank line */
	210	HTTP_POST_RECV, /* POST command, receiving data */
	211	HTTP_POST_SEND, /* POST command, sending data */
	212	HTTP_PUT, /* PUT command, waiting for blank line */
	213	HTTP_PUT_RECV, /* PUT command, receiving data */
	214	HTTP_DELETE, /* DELETE command, waiting for blank line */
215	HTTP_TRACE, /* TRACE command, waiting for blank line */
216	HTTP_CLOSE, /* CLOSE command, waiting for blank line */
217	HTTP_STATUS /* Command complete, sending status */
218	} http_state_t;
219
220	typedef enum http_status_e /** HTTP status codes **/
221	{
222	HTTP_ERROR = -1, /* An error response from httpXxxx() */
223
224	HTTP_CONTINUE = 100, /* Everything OK, keep going... */
225	HTTP_SWITCHING_PROTOCOLS, /* HTTP upgrade to TLS/SSL */
226
227	HTTP_OK = 200, /* OPTIONS/GET/HEAD/POST/TRACE command was successful */
228	HTTP_CREATED, /* PUT command was successful */
229	HTTP_ACCEPTED, /* DELETE command was successful */
230	HTTP_NOT_AUTHORITATIVE, /* Information isn't authoritative */
231	HTTP_NO_CONTENT, /* Successful command, no new data */
232	HTTP_RESET_CONTENT, /* Content was reset/recreated */
233	HTTP_PARTIAL_CONTENT, /* Only a partial file was recieved/sent */
234
235	HTTP_MULTIPLE_CHOICES = 300, /* Multiple files match request */
236	HTTP_MOVED_PERMANENTLY, /* Document has moved permanently */
237	HTTP_MOVED_TEMPORARILY, /* Document has moved temporarily */
238	HTTP_SEE_OTHER, /* See this other link... */
239	HTTP_NOT_MODIFIED, /* File not modified */
240	HTTP_USE_PROXY, /* Must use a proxy to access this URI */
241
242	HTTP_BAD_REQUEST = 400, /* Bad request */
243	HTTP_UNAUTHORIZED, /* Unauthorized to access host */
244	HTTP_PAYMENT_REQUIRED, /* Payment required */
245	HTTP_FORBIDDEN, /* Forbidden to access this URI */
246	HTTP_NOT_FOUND, /* URI was not found */
247	HTTP_METHOD_NOT_ALLOWED, /* Method is not allowed */
248	HTTP_NOT_ACCEPTABLE, /* Not Acceptable */
249	HTTP_PROXY_AUTHENTICATION, /* Proxy Authentication is Required */
250	HTTP_REQUEST_TIMEOUT, /* Request timed out */
251	HTTP_CONFLICT, /* Request is self-conflicting */
252	HTTP_GONE, /* Server has gone away */
253	HTTP_LENGTH_REQUIRED, /* A content length or encoding is required */
254	HTTP_PRECONDITION, /* Precondition failed */
255	HTTP_REQUEST_TOO_LARGE, /* Request entity too large */
256	HTTP_URI_TOO_LONG, /* URI too long */
257	HTTP_UNSUPPORTED_MEDIATYPE, /* The requested media type is unsupported */
b423cd4c	258	HTTP_REQUESTED_RANGE, /* The requested range is not satisfiable */
b423cd4c	259	HTTP_EXPECTATION_FAILED, /* The expectation given in an Expect header field was not met */
ef416fc2	260	HTTP_UPGRADE_REQUIRED = 426, /* Upgrade to SSL/TLS required */
	261
	262	HTTP_SERVER_ERROR = 500, /* Internal server error */
	263	HTTP_NOT_IMPLEMENTED, /* Feature not implemented */
	264	HTTP_BAD_GATEWAY, /* Bad gateway */
	265	HTTP_SERVICE_UNAVAILABLE, /* Service is unavailable */
	266	HTTP_GATEWAY_TIMEOUT, /* Gateway connection timed out */
	267	HTTP_NOT_SUPPORTED /* HTTP version not supported */
	268	} http_status_t;
	269
	270	typedef enum http_uri_status_e /** URI separation status @since CUPS1.2@ **/
	271	{
	272	HTTP_URI_OVERFLOW = -8, /* URI buffer for httpAssembleURI is too small */
	273	HTTP_URI_BAD_ARGUMENTS = -7, /* Bad arguments to function (error) */
	274	HTTP_URI_BAD_RESOURCE = -6, /* Bad resource in URI (error) */
	275	HTTP_URI_BAD_PORT = -5, /* Bad port number in URI (error) */
	276	HTTP_URI_BAD_HOSTNAME = -4, /* Bad hostname in URI (error) */
	277	HTTP_URI_BAD_USERNAME = -3, /* Bad username in URI (error) */
	278	HTTP_URI_BAD_SCHEME = -2, /* Bad scheme in URI (error) */
	279	HTTP_URI_BAD_URI = -1, /* Bad/empty URI (error) */
	280	HTTP_URI_OK = 0, /* URI decoded OK */
	281	HTTP_URI_MISSING_SCHEME, /* Missing scheme in URI (warning) */
	282	HTTP_URI_UNKNOWN_SCHEME, /* Unknown scheme in URI (warning) */
	283	HTTP_URI_MISSING_RESOURCE /* Missing resource in URI (warning) */
	284	} http_uri_status_t;
	285
a4d04587	286	typedef enum http_uri_coding_e /** URI en/decode flags **/
	287	{
	288	HTTP_URI_CODING_NONE = 0, /* Don't en/decode anything */
	289	HTTP_URI_CODING_USERNAME = 1, /* En/decode the username portion */
	290	HTTP_URI_CODING_HOSTNAME = 2, /* En/decode the hostname portion */
	291	HTTP_URI_CODING_RESOURCE = 4, /* En/decode the resource portion */
	292	HTTP_URI_CODING_MOST = 7, /* En/decode all but the query */
	293	HTTP_URI_CODING_QUERY = 8, /* En/decode the query portion */
	294	HTTP_URI_CODING_ALL = 15 /* En/decode everything */
	295	} http_uri_coding_t;
	296
ef416fc2	297	typedef enum http_version_e /** HTTP version numbers **/
	298	{
	299	HTTP_0_9 = 9, /* HTTP/0.9 */
	300	HTTP_1_0 = 100, /* HTTP/1.0 */
	301	HTTP_1_1 = 101 /* HTTP/1.1 */
	302	} http_version_t;
	303
ecdc0628	304	typedef union _http_addr_u /**** Socket address union, which
ef416fc2	305	**** makes using IPv6 and other
	306	**** address types easier and
	307	**** more portable. @since CUPS 1.2@
	308	****/
	309	{
	310	struct sockaddr addr; /* Base structure for family value */
	311	struct sockaddr_in ipv4; /* IPv4 address */
	312	#ifdef AF_INET6
	313	struct sockaddr_in6 ipv6; /* IPv6 address */
	314	#endif /* AF_INET6 */
	315	#ifdef AF_LOCAL
	316	struct sockaddr_un un; /* Domain socket file */
	317	#endif /* AF_LOCAL */
	318	char pad[256]; /* Padding to ensure binary compatibility */
	319	} http_addr_t;
	320
	321	typedef struct http_addrlist_s /**** Socket address list, which is
	322	**** used to enumerate all of the
	323	**** addresses that are associated
	324	**** with a hostname. @since CUPS 1.2@
	325	****/
	326	{
	327	struct http_addrlist_s next; / Pointer to next address in list */
	328	http_addr_t addr; /* Address */
	329	} http_addrlist_t;
	330
f7deaa1a	331	typedef struct _http_s http_t; /** HTTP connection type **/
ef416fc2	332
	333
	334	/*
	335	* Prototypes...
	336	*/
	337
ecdc0628	338	extern void httpBlocking(http_t *http, int b);
ef416fc2	339	extern int httpCheck(http_t *http);
ecdc0628	340	extern void httpClearFields(http_t *http);
ef416fc2	341	extern void httpClose(http_t *http);
	342	extern http_t httpConnect(const char host, int port);
	343	extern http_t httpConnectEncrypt(const char host, int port,
	344	http_encryption_t encryption);
	345	extern int httpDelete(http_t http, const char uri);
	346	extern int httpEncryption(http_t *http, http_encryption_t e);
ecdc0628	347	extern int httpError(http_t *http);
ef416fc2	348	extern void httpFlush(http_t *http);
	349	extern int httpGet(http_t http, const char uri);
	350	extern char httpGets(char line, int length, http_t *http);
	351	extern const char *httpGetDateString(time_t t);
	352	extern time_t httpGetDateTime(const char *s);
ecdc0628	353	extern const char httpGetField(http_t http, http_field_t field);
ef416fc2	354	extern struct hostent httpGetHostByName(const char name);
	355	extern char httpGetSubField(http_t http, http_field_t field,
	356	const char name, char value);
	357	extern int httpHead(http_t http, const char uri);
	358	extern void httpInitialize(void);
	359	extern int httpOptions(http_t http, const char uri);
	360	extern int httpPost(http_t http, const char uri);
	361	extern int httpPrintf(http_t http, const char format, ...)
	362	# ifdef __GNUC__
	363	__attribute__ ((__format__ (__printf__, 2, 3)))
	364	# endif /* __GNUC__ */
	365	;
	366	extern int httpPut(http_t http, const char uri);
a4d04587	367	extern int httpRead(http_t http, char buffer, int length) _HTTP_DEPRECATED;
ef416fc2	368	extern int httpReconnect(http_t *http);
	369	extern void httpSeparate(const char uri, char method,
	370	char username, char host, int *port,
	371	char *resource) _HTTP_DEPRECATED;
	372	extern void httpSetField(http_t *http, http_field_t field,
	373	const char *value);
	374	extern const char *httpStatus(http_status_t status);
	375	extern int httpTrace(http_t http, const char uri);
	376	extern http_status_t httpUpdate(http_t *http);
a4d04587	377	extern int httpWrite(http_t http, const char buffer, int length) _HTTP_DEPRECATED;
ef416fc2	378	extern char httpEncode64(char out, const char *in) _HTTP_DEPRECATED;
	379	extern char httpDecode64(char out, const char *in) _HTTP_DEPRECATED;
	380	extern int httpGetLength(http_t *http) _HTTP_DEPRECATED;
	381	extern char httpMD5(const char , const char , const char ,
	382	char [33]);
	383	extern char httpMD5Final(const char , const char , const char ,
	384	char [33]);
	385	extern char httpMD5String(const unsigned char , char [33]);
	386
	387	/** New in CUPS 1.1.19 **/
	388	extern void httpClearCookie(http_t *http);
ecdc0628	389	extern const char httpGetCookie(http_t http);
ef416fc2	390	extern void httpSetCookie(http_t http, const char cookie);
	391	extern int httpWait(http_t *http, int msec);
	392
	393	/** New in CUPS 1.1.21 **/
	394	extern char httpDecode64_2(char out, int outlen, const char in);
	395	extern char httpEncode64_2(char out, int outlen, const char *in,
	396	int inlen);
	397	extern void httpSeparate2(const char *uri,
	398	char *method, int methodlen,
	399	char *username, int usernamelen,
	400	char host, int hostlen, int port,
	401	char *resource, int resourcelen) _HTTP_DEPRECATED;
	402
	403	/** New in CUPS 1.2 **/
	404	extern int httpAddrAny(const http_addr_t *addr);
	405	extern http_addrlist_t httpAddrConnect(http_addrlist_t addrlist, int *sock);
	406	extern int httpAddrEqual(const http_addr_t *addr1,
	407	const http_addr_t *addr2);
	408	extern void httpAddrFreeList(http_addrlist_t *addrlist);
	409	extern http_addrlist_t httpAddrGetList(const char hostname, int family,
	410	const char *service);
	411	extern int httpAddrLength(const http_addr_t *addr);
	412	extern int httpAddrLocalhost(const http_addr_t *addr);
	413	extern char httpAddrLookup(const http_addr_t addr,
	414	char *name, int namelen);
	415	extern char httpAddrString(const http_addr_t addr,
	416	char *s, int slen);
a4d04587	417	extern http_uri_status_t httpAssembleURI(http_uri_coding_t encoding,
a4d04587	418	char *uri, int urilen,
ef416fc2	419	const char *scheme,
	420	const char *username,
	421	const char *host, int port,
	422	const char *resource);
a4d04587	423	extern http_uri_status_t httpAssembleURIf(http_uri_coding_t encoding,
a4d04587	424	char *uri, int urilen,
ef416fc2	425	const char *scheme,
	426	const char *username,
	427	const char *host, int port,
	428	const char *resourcef, ...);
	429	extern int httpFlushWrite(http_t *http);
ecdc0628	430	extern int httpGetBlocking(http_t *http);
ef416fc2	431	extern const char httpGetDateString2(time_t t, char s, int slen);
ecdc0628	432	extern int httpGetFd(http_t *http);
757d2cad	433	extern const char httpGetHostname(http_t http, char *s, int slen);
ef416fc2	434	extern off_t httpGetLength2(http_t *http);
ecdc0628	435	extern http_status_t httpGetStatus(http_t *http);
ef416fc2	436	extern char httpGetSubField2(http_t http, http_field_t field,
	437	const char name, char value,
	438	int valuelen);
a4d04587	439	extern ssize_t httpRead2(http_t http, char buffer, size_t length);
	440	extern http_uri_status_t httpSeparateURI(http_uri_coding_t decoding,
	441	const char *uri,
ef416fc2	442	char *scheme, int schemelen,
	443	char *username, int usernamelen,
	444	char host, int hostlen, int port,
	445	char *resource, int resourcelen);
b423cd4c	446	extern void httpSetExpect(http_t *http, http_status_t expect);
ef416fc2	447	extern void httpSetLength(http_t *http, size_t length);
a4d04587	448	extern ssize_t httpWrite2(http_t http, const char buffer,
a4d04587	449	size_t length);
ef416fc2	450
	451
	452	/*
	453	* C++ magic...
	454	*/
	455
	456	# ifdef __cplusplus
	457	}
	458	# endif /* __cplusplus */
	459	#endif /* !_CUPS_HTTP_H_ */
	460
	461	/*
f7deaa1a	462	* End of "$Id: http.h 6187 2007-01-10 16:20:42Z mike $".
ef416fc2	463	*/