hostapd/src/wps/httpread.h

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2009-11-28 20:14:36 +01:00
/*
* httpread - Manage reading file(s) from HTTP/TCP socket
* Author: Ted Merrill
* Copyright 2008 Atheros Communications
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#ifndef HTTPREAD_H
#define HTTPREAD_H
/* event types (passed to callback) */
enum httpread_event {
HTTPREAD_EVENT_FILE_READY = 1, /* including reply ready */
HTTPREAD_EVENT_TIMEOUT = 2,
HTTPREAD_EVENT_ERROR = 3 /* misc. error, esp malloc error */
};
/* header type detected
* available to callback via call to httpread_reply_code_get()
*/
enum httpread_hdr_type {
HTTPREAD_HDR_TYPE_UNKNOWN = 0, /* none of the following */
HTTPREAD_HDR_TYPE_REPLY = 1, /* hdr begins w/ HTTP/ */
HTTPREAD_HDR_TYPE_GET = 2, /* hdr begins with GET<sp> */
HTTPREAD_HDR_TYPE_HEAD = 3, /* hdr begins with HEAD<sp> */
HTTPREAD_HDR_TYPE_POST = 4, /* hdr begins with POST<sp> */
HTTPREAD_HDR_TYPE_PUT = 5, /* hdr begins with ... */
HTTPREAD_HDR_TYPE_DELETE = 6, /* hdr begins with ... */
HTTPREAD_HDR_TYPE_TRACE = 7, /* hdr begins with ... */
HTTPREAD_HDR_TYPE_CONNECT = 8, /* hdr begins with ... */
HTTPREAD_HDR_TYPE_NOTIFY = 9, /* hdr begins with ... */
HTTPREAD_HDR_TYPE_M_SEARCH = 10, /* hdr begins with ... */
HTTPREAD_HDR_TYPE_M_POST = 11, /* hdr begins with ... */
HTTPREAD_HDR_TYPE_SUBSCRIBE = 12, /* hdr begins with ... */
HTTPREAD_HDR_TYPE_UNSUBSCRIBE = 13, /* hdr begins with ... */
HTTPREAD_N_HDR_TYPES /* keep last */
};
/* control instance -- opaque struct declaration
*/
struct httpread;
/* httpread_destroy -- if h is non-NULL, clean up
* This must eventually be called by the application following
* call of the application's callback and may be called
* earlier if desired.
*/
void httpread_destroy(struct httpread *h);
/* httpread_create -- start a new reading session making use of eloop.
* The new instance will use the socket descriptor for reading (until
* it gets a file and not after) but will not close the socket, even
* when the instance is destroyed (the application must do that).
* Return NULL on error.
*
* Provided that httpread_create successfully returns a handle,
* the callback fnc is called to handle httpread_event events.
* The caller should do destroy on any errors or unknown events.
*
* Pass max_bytes == 0 to not read body at all (required for e.g.
* reply to HEAD request).
*/
struct httpread * httpread_create(
int sd, /* descriptor of TCP socket to read from */
void (*cb)(struct httpread *handle, void *cookie,
enum httpread_event e), /* call on event */
void *cookie, /* pass to callback */
int max_bytes, /* maximum file size else abort it */
int timeout_seconds /* 0; or total duration timeout period */
);
/* httpread_hdr_type_get -- When file is ready, returns header type.
*/
enum httpread_hdr_type httpread_hdr_type_get(struct httpread *h);
/* httpread_uri_get -- When file is ready, uri_get returns (translated) URI
* or possibly NULL (which would be an error).
*/
char *httpread_uri_get(struct httpread *h);
/* httpread_reply_code_get -- When reply is ready, returns reply code */
int httpread_reply_code_get(struct httpread *h);
/* httpread_length_get -- When file is ready, returns file length. */
int httpread_length_get(struct httpread *h);
/* httpread_data_get -- When file is ready, returns file content
* with null byte appened.
* Might return NULL in some error condition.
*/
void * httpread_data_get(struct httpread *h);
/* httpread_hdr_get -- When file is ready, returns header content
* with null byte appended.
* Might return NULL in some error condition.
*/
char * httpread_hdr_get(struct httpread *h);
/* httpread_hdr_line_get -- When file is ready, returns pointer
* to line within header content matching the given tag
* (after the tag itself and any spaces/tabs).
*
* The tag should end with a colon for reliable matching.
*
* If not found, returns NULL;
*/
char * httpread_hdr_line_get(struct httpread *h, const char *tag);
#endif /* HTTPREAD_H */