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- /*
- * "$Id: http.h,v 1.47 2003/08/29 21:26:41 mike Exp $"
- *
- * Hyper-Text Transport Protocol definitions for the Common UNIX Printing
- * System (CUPS).
- *
- * Copyright 1997-2003 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 20636-3111 USA
- *
- * Voice: (301) 373-9603
- * 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>
- # ifdef WIN32
- # include <winsock.h>
- # else
- # include <unistd.h>
- # include <sys/time.h>
- # include <sys/types.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 */
- # endif /* WIN32 */
-
- # include "md5.h"
-
-
- /*
- * C++ magic...
- */
-
- # ifdef __cplusplus
- extern "C" {
- # endif /* __cplusplus */
-
-
- /*
- * 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 */
-
-
- /*
- * HTTP state values...
- */
-
- typedef enum /* 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;
-
-
- /*
- * HTTP version numbers...
- */
-
- typedef enum
- {
- HTTP_0_9 = 9, /* HTTP/0.9 */
- HTTP_1_0 = 100, /* HTTP/1.0 */
- HTTP_1_1 = 101 /* HTTP/1.1 */
- } http_version_t;
-
-
- /*
- * HTTP keep-alive values...
- */
-
- typedef enum
- {
- HTTP_KEEPALIVE_OFF = 0,
- HTTP_KEEPALIVE_ON
- } http_keepalive_t;
-
-
- /*
- * HTTP transfer encoding values...
- */
-
- typedef enum
- {
- HTTP_ENCODE_LENGTH, /* Data is sent with Content-Length */
- HTTP_ENCODE_CHUNKED /* Data is chunked */
- } http_encoding_t;
-
-
- /*
- * HTTP encryption values...
- */
-
- typedef enum
- {
- 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;
-
-
- /*
- * HTTP authentication types...
- */
-
- typedef enum
- {
- 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_t;
-
-
- /*
- * HTTP status codes...
- */
-
- typedef enum
- {
- 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_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;
-
-
- /*
- * HTTP field names...
- */
-
- typedef enum
- {
- HTTP_FIELD_UNKNOWN = -1,
- HTTP_FIELD_ACCEPT_LANGUAGE,
- HTTP_FIELD_ACCEPT_RANGES,
- HTTP_FIELD_AUTHORIZATION,
- HTTP_FIELD_CONNECTION,
- HTTP_FIELD_CONTENT_ENCODING,
- HTTP_FIELD_CONTENT_LANGUAGE,
- HTTP_FIELD_CONTENT_LENGTH,
- HTTP_FIELD_CONTENT_LOCATION,
- HTTP_FIELD_CONTENT_MD5,
- HTTP_FIELD_CONTENT_RANGE,
- HTTP_FIELD_CONTENT_TYPE,
- HTTP_FIELD_CONTENT_VERSION,
- HTTP_FIELD_DATE,
- HTTP_FIELD_HOST,
- HTTP_FIELD_IF_MODIFIED_SINCE,
- HTTP_FIELD_IF_UNMODIFIED_SINCE,
- HTTP_FIELD_KEEP_ALIVE,
- HTTP_FIELD_LAST_MODIFIED,
- HTTP_FIELD_LINK,
- HTTP_FIELD_LOCATION,
- HTTP_FIELD_RANGE,
- HTTP_FIELD_REFERER,
- HTTP_FIELD_RETRY_AFTER,
- HTTP_FIELD_TRANSFER_ENCODING,
- HTTP_FIELD_UPGRADE,
- HTTP_FIELD_USER_AGENT,
- HTTP_FIELD_WWW_AUTHENTICATE,
- HTTP_FIELD_MAX
- } http_field_t;
-
-
- /*
- * HTTP connection structure...
- */
-
- typedef struct
- {
- int fd; /* File descriptor for this socket */
- int blocking; /* To block or not to block */
- int error; /* Last error on read */
- time_t activity; /* Time since last read/write */
- http_state_t state; /* State of client */
- http_status_t status; /* Status of last request */
- http_version_t version; /* Protocol version */
- http_keepalive_t keep_alive; /* Keep-alive supported? */
- struct sockaddr_in hostaddr; /* Address of connected host */
- char hostname[HTTP_MAX_HOST],
- /* Name of connected host */
- fields[HTTP_FIELD_MAX][HTTP_MAX_VALUE];
- /* Field values */
- char *data; /* Pointer to data buffer */
- http_encoding_t data_encoding; /* Chunked or not */
- int data_remaining; /* Number of bytes left */
- int used; /* Number of bytes used in buffer */
- char buffer[HTTP_MAX_BUFFER];
- /* Buffer for messages */
- int auth_type; /* Authentication in use */
- md5_state_t md5_state; /* MD5 state */
- char nonce[HTTP_MAX_VALUE];
- /* Nonce value */
- int nonce_count; /* Nonce count */
- void *tls; /* TLS state information */
- http_encryption_t encryption; /* Encryption requirements */
- /**** New in CUPS 1.1.19 ****/
- fd_set *input_set; /* select() set for httpWait() */
- http_status_t expect; /* Expect: header */
- char *cookie; /* Cookie value(s) */
- /**** New in CUPS 1.1.20 ****/
- char authstring[HTTP_MAX_VALUE],
- /* Current Authentication value */
- userpass[HTTP_MAX_VALUE];
- /* Username:password string */
- int digest_tries; /* Number of tries for digest auth */
- } http_t;
-
-
- /*
- * Prototypes...
- */
-
- # define httpBlocking(http,b) (http)->blocking = (b)
- extern int httpCheck(http_t *http);
- # define httpClearFields(http) memset((http)->fields, 0, sizeof((http)->fields)),\
- httpSetField((http), HTTP_FIELD_HOST, (http)->hostname)
- 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 encrypt);
- extern int httpDelete(http_t *http, const char *uri);
- extern int httpEncryption(http_t *http, http_encryption_t e);
- # define httpError(http) ((http)->error)
- 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);
- # define httpGetField(http,field) (http)->fields[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);
- extern int httpReconnect(http_t *http);
- extern void httpSeparate(const char *uri, char *method,
- char *username, char *host, int *port,
- char *resource);
- 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);
- extern char *httpEncode64(char *out, const char *in);
- extern char *httpDecode64(char *out, const char *in);
- extern int httpGetLength(http_t *http);
- 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 md5_byte_t *, char [33]);
-
- /**** New in CUPS 1.1.19 ****/
- extern void httpClearCookie(http_t *http);
- #define httpGetCookie(http) ((http)->cookie)
- extern void httpSetCookie(http_t *http, const char *cookie);
- extern int httpWait(http_t *http, int msec);
-
-
- /*
- * C++ magic...
- */
-
- # ifdef __cplusplus
- }
- # endif /* __cplusplus */
- #endif /* !_CUPS_HTTP_H_ */
-
- /*
- * End of "$Id: http.h,v 1.47 2003/08/29 21:26:41 mike Exp $".
- */
-