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third_party_nghttp2/lib/spdylay_frame.h
Tatsuhiro Tsujikawa 4dd9c32c25 Added SPDYLAY_OPT_MAX_RECV_CTRL_FRAME_BUFFER option. 
This option sets maximum receive buffer size for incoming control
frame.  Basically the library checks the length field of the incoming
control frame. For frames with name/value header block, the library
also checks the length of inflated block is also under the limit. This
is done while incrementally inflating block. If the length of frames
with name/value header block exceeds the limit, the library will issue
RST_STREAM with FRAME_TOO_LARGE. For other frames, it will issue
GOAWAY.
2012-05-25 13:49:18 +09:00

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/*
* Spdylay - SPDY Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef SPDYLAY_FRAME_H
#define SPDYLAY_FRAME_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <spdylay/spdylay.h>
#include "spdylay_zlib.h"
#include "spdylay_buffer.h"
#include "spdylay_client_cert_vector.h"
#define SPDYLAY_STREAM_ID_MASK 0x7fffffff
#define SPDYLAY_LENGTH_MASK 0xffffff
#define SPDYLAY_VERSION_MASK 0x7fff
#define SPDYLAY_DELTA_WINDOW_SIZE_MASK 0x7fffffff
#define SPDYLAY_SETTINGS_ID_MASK 0xffffff
/* The length of DATA frame payload. */
#define SPDYLAY_DATA_PAYLOAD_LENGTH 4096
/* The number of bytes of frame header. */
#define SPDYLAY_FRAME_HEAD_LENGTH 8
/* The offset to the name/value header block in the frame (including
frame header) */
#define SPDYLAY_SYN_STREAM_NV_OFFSET 18
#define SPDYLAY_SPDY2_SYN_REPLY_NV_OFFSET 14
#define SPDYLAY_SPDY3_SYN_REPLY_NV_OFFSET 12
#define SPDYLAY_SPDY2_HEADERS_NV_OFFSET 14
#define SPDYLAY_SPDY3_HEADERS_NV_OFFSET 12
#define spdylay_frame_get_nv_len(RED, LEN_SIZE) \
(LEN_SIZE == 2 ? spdylay_buffer_reader_uint16(RED) : \
spdylay_buffer_reader_uint32(RED))
#define spdylay_frame_put_nv_len(OUT, VAL, LEN_SIZE) \
(LEN_SIZE == 2 ? \
spdylay_put_uint16be(OUT, VAL) : spdylay_put_uint32be(OUT, VAL))
/* Category of SPDY frames. */
typedef enum {
/* Control frame */
SPDYLAY_CTRL,
/* DATA frame */
SPDYLAY_DATA
} spdylay_frame_category;
/**
* @struct
* The DATA frame. It has the following members:
*/
typedef struct {
/**
* The stream ID.
*/
int32_t stream_id;
/**
* The DATA frame flags. See :type:`spdylay_data_flag`.
*/
uint8_t flags;
/**
* The flag to indicate whether EOF was reached or not. Initially
* |eof| is 0. It becomes 1 after all data were read.
*/
uint8_t eof;
/**
* The data to be sent for this DATA frame.
*/
spdylay_data_provider data_prd;
} spdylay_data;
/*
* Returns the number of bytes in length of name/value pair for the
* given protocol version |version|. If |version| is not supported,
* returns 0.
*/
size_t spdylay_frame_get_len_size(uint16_t version);
/*
* Packs SYN_STREAM frame |frame| in wire format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr| bytes.
* The |*nvbuf_ptr| is used to store inflated name/value pairs in wire
* format temporarily. Its length is |*nvbuflen_ptr| bytes. This
* function expands |*buf_ptr| and |*nvbuf_ptr| as necessary to store
* frame and name/value pairs. When expansion occurred, memory
* previously pointed by |*buf_ptr| and |*nvbuf_ptr| is freed.
* |*buf_ptr|, |*buflen_ptr|, |*nvbuf_ptr| and |*nvbuflen_ptr| are
* updated accordingly.
*
* frame->hd.length is assigned after length is determined during
* packing process.
*
* This function returns the size of packed frame if it succeeds, or
* returns one of the following negative error codes:
*
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_ZLIB
* The deflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_pack_syn_stream(uint8_t **buf_ptr,
size_t *buflen_ptr,
uint8_t **nvbuf_ptr,
size_t *nvbuflen_ptr,
spdylay_syn_stream *frame,
spdylay_zlib *deflater);
/*
* Unpacks SYN_STREAM frame byte sequence into |frame|. The control
* frame header is given in |head| with |headlen| length. In spdy/3
* spec, headlen is 8 bytes. |payload| is the data after length field
* of the header and just before name/value header block.
*
* The |inflatebuf| contains inflated name/value header block in wire
* foramt.
*
* This function also validates the name/value pairs. If unpacking
* succeeds but validation fails, it is indicated by returning
* SPDYLAY_ERR_INVALID_HEADER_BLOCK.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_HEADER_BLOCK
* Unpacking succeeds but the header block is invalid.
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
int spdylay_frame_unpack_syn_stream(spdylay_syn_stream *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen,
spdylay_buffer *inflatebuf);
/*
* Unpacks SYN_STREAM frame byte sequence into |frame|. This function
* only unapcks bytes that come before name/value header block.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
*/
int spdylay_frame_unpack_syn_stream_without_nv(spdylay_syn_stream *frame,
const uint8_t *head,
size_t headlen,
const uint8_t *payload,
size_t payloadlen);
/*
* Packs SYN_REPLY frame |frame| in wire frame format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr| bytes.
* The |*nvbuf_ptr| is used to store inflated name/value pairs in wire
* format temporarily. Its length is |*nvbuflen_ptr| bytes. This
* function expands |*buf_ptr| and |*nvbuf_ptr| as necessary to store
* frame and name/value pairs. When expansion occurred, memory
* previously pointed by |*buf_ptr| and |*nvbuf_ptr| is freed.
* |*buf_ptr|, |*buflen_ptr|, |*nvbuf_ptr| and |*nvbuflen_ptr| are
* updated accordingly.
*
* frame->hd.length is assigned after length is determined during
* packing process.
*
* This function returns the size of packed frame if it succeeds, or
* returns one of the following negative error codes:
*
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_ZLIB
* The deflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_pack_syn_reply(uint8_t **buf_ptr,
size_t *buflen_ptr,
uint8_t **nvbuf_ptr,
size_t *nvbuflen_ptr,
spdylay_syn_reply *frame,
spdylay_zlib *deflater);
/*
* Unpacks SYN_REPLY frame byte sequence into |frame|.
*
* The |inflatebuf| contains inflated name/value header block in wire
* foramt.
*
* This function also validates the name/value pairs. If unpacking
* succeeds but validation fails, it is indicated by returning
* SPDYLAY_ERR_INVALID_HEADER_BLOCK.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_HEADER_BLOCK
* Unpacking succeeds but the header block is invalid.
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
int spdylay_frame_unpack_syn_reply(spdylay_syn_reply *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen,
spdylay_buffer *inflatebuf);
/*
* Unpacks SYN_REPLY frame byte sequence into |frame|. This function
* only unapcks bytes that come before name/value header block.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
*/
int spdylay_frame_unpack_syn_reply_without_nv(spdylay_syn_reply *frame,
const uint8_t *head,
size_t headlen,
const uint8_t *payload,
size_t payloadlen);
/*
* Packs PING frame |frame| in wire format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store
* given |frame|.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_pack_ping(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_ping *frame);
/*
* Unpacks PING wire format into |frame|.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
*/
int spdylay_frame_unpack_ping(spdylay_ping *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen);
/*
* Packs GOAWAY frame |frame | in wire format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store
* given |frame|.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_pack_goaway(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_goaway *frame);
/*
* Unpacks GOAWAY wire format into |frame|.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
*/
int spdylay_frame_unpack_goaway(spdylay_goaway *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen);
/*
* Packs HEADERS frame |frame| in wire format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr| bytes.
* The |*nvbuf_ptr| is used to store inflated name/value pairs in wire
* format temporarily. Its length is |*nvbuflen_ptr| bytes. This
* function expands |*buf_ptr| and |*nvbuf_ptr| as necessary to store
* frame and name/value pairs. When expansion occurred, memory
* previously pointed by |*buf_ptr| and |*nvbuf_ptr| is freed.
* |*buf_ptr|, |*buflen_ptr|, |*nvbuf_ptr| and |*nvbuflen_ptr| are
* updated accordingly.
*
* frame->hd.length is assigned after length is determined during
* packing process.
*
* This function returns the size of packed frame if it succeeds, or
* returns one of the following negative error codes:
*
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_ZLIB
* The deflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_pack_headers(uint8_t **buf_ptr, size_t *buflen_ptr,
uint8_t **nvbuf_ptr, size_t *nvbuflen_ptr,
spdylay_headers *frame,
spdylay_zlib *deflater);
/*
* Unpacks HEADERS wire format into |frame|.
*
* The |inflatebuf| contains inflated name/value header block in wire
* foramt.
*
* This function also validates the name/value pairs. If unpacking
* succeeds but validation fails, it is indicated by returning
* SPDYLAY_ERR_INVALID_HEADER_BLOCK.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_HEADER_BLOCK
* Unpacking succeeds but the header block is invalid.
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
int spdylay_frame_unpack_headers(spdylay_headers *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen,
spdylay_buffer *inflatebuf);
/*
* Unpacks HEADERS frame byte sequence into |frame|. This function
* only unapcks bytes that come before name/value header block.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
*/
int spdylay_frame_unpack_headers_without_nv(spdylay_headers *frame,
const uint8_t *head,
size_t headlen,
const uint8_t *payload,
size_t payloadlen);
/*
* Packs RST_STREAM frame |frame| in wire frame format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store
* given |frame|. In spdy/2 spec, RST_STREAM wire format is always 16
* bytes long.
*
* This function returns the size of packed frame if it succeeds, or
* returns one of the following negative error codes:
*
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_pack_rst_stream(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_rst_stream *frame);
/*
* Unpacks RST_STREAM frame byte sequence into |frame|.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
*/
int spdylay_frame_unpack_rst_stream(spdylay_rst_stream *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen);
/*
* Packs WINDOW_UPDATE frame |frame| in wire frame format and store it
* in |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store
* given |frame|. In SPDY/3 spec, WINDOW_UPDATE wire format is always 16
* bytes long.
*
* This function returns the size of packed frame if it succeeds, or
* returns one of the following negative error codes:
*
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_pack_window_update(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_window_update *frame);
/*
* Unpacks WINDOW_UPDATE frame byte sequence into |frame|.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
*/
int spdylay_frame_unpack_window_update(spdylay_window_update *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload,
size_t payloadlen);
/*
* Packs SETTINGS frame |frame| in wire format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store
* given |frame|.
*
* This function returns the size of packed frame if it succeeds, or
* returns one of the following negative error codes:
*
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_pack_settings(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_settings *frame);
/*
* Unpacks SETTINGS wire format into |frame|.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_UNSUPPORTED_VERSION
* The version is not supported.
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
int spdylay_frame_unpack_settings(spdylay_settings *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen);
/*
* Packs CREDENTIAL frame |frame| in wire format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store
* given |frame|.
*
* This function returns the size of packed frame if it succeeds, or
* returns one of the following negative error codes:
*
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_pack_credential(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_credential *frame);
/*
* Unpacks CREDENTIAL wire format into |frame|.
*
* This function returns 0 if it succeeds or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
int spdylay_frame_unpack_credential(spdylay_credential *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen);
/*
* Returns number of bytes to pack name/value pairs |nv|. This
* function expects |nv| is sorted in ascending order of key.
* |len_size| is the number of bytes in length of name/value pair and
* it must be 2 or 4.
*
* This function can handles duplicate keys and concatenation of thier
* values with '\0'.
*/
size_t spdylay_frame_count_nv_space(char **nv, size_t len_size);
/*
* Packs name/value pairs in |nv| in |buf|. |buf| must have at least
* spdylay_frame_count_nv_space(nv) bytes. |len_size| is the number
* of bytes in length of name/value pair and it must be 2 or 4.
*/
ssize_t spdylay_frame_pack_nv(uint8_t *buf, char **nv, size_t len_size);
/*
* Packs name/value pairs in |nv| in |*buf_ptr| with offset
* |nv_offset|. It means first byte of packed name/value pairs is
* stored in |*buf_ptr|+|nv_offset|. |*buf_ptr| and |*nvbuf_ptr| are
* expanded as necessary.
*
* This function returns the number of the bytes for the frame
* containing this name/value pairs if it succeeds, or one of the
* following negative error codes:
*
* SPDYLAY_ERR_ZLIB
* The deflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
ssize_t spdylay_frame_alloc_pack_nv(uint8_t **buf_ptr,
size_t *buflen_ptr,
uint8_t **nvbuf_ptr,
size_t *nvbuflen_ptr,
char **nv, size_t nv_offset,
size_t len_size,
spdylay_zlib *deflater);
/*
* Counts number of name/value pair in |in| and computes length of
* buffers to store unpacked name/value pair and store them in
* |*nvlen_ptr| and |*buflen_ptr| respectively. |len_size| is the
* number of bytes in length of name/value pair and it must be 2 or
* 4. We use folloing data structure in |*buflen_ptr| size. First
* part of the data is array of pointer to name/value pair. Supporse
* the buf pointer points to the data region and N is the number of
* name/value pair. First (N*2+1)*sizeof(char*) bytes contain array
* of pointer to name/value pair and terminating NULL. Each pointer
* to name/value pair points to the string in remaining data. For
* each name/value pair, the name is copied to the remaining data with
* terminating NULL character. The value is also copied to the
* position after the data with terminating NULL character. The
* corresponding index is assigned to these pointers. If the value
* contains multiple values (delimited by single NULL), for each such
* data, corresponding index is assigned to name/value pointers. In
* this case, the name string is reused.
*
* With the above stragety, |*buflen_ptr| is calculated as
* (N*2+1)*sizeof(char*)+sum(strlen(name)+1+strlen(value)+1){for each
* name/value pair}.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_FRAME
* The input data are invalid.
*/
int spdylay_frame_count_unpack_nv_space(size_t *nvlen_ptr, size_t *buflen_ptr,
spdylay_buffer *in, size_t len_size);
/*
* Unpacks name/value header block in wire format |in| and stores them
* in |*nv_ptr|. Thif function allocates enough memory to store
* name/value pairs in |*nv_ptr|. |len_size| is the number of bytes
* in length of name/value pair and it must be 2 or 4.
*
* This function also validates the name/value pairs. If unpacking
* succeeds but validation fails, it is indicated by returning
* SPDYLAY_ERR_INVALID_HEADER_BLOCK.
*
* If error other than SPDYLAY_ERR_INVALID_HEADER_BLOCK is returned,
* the |nv_ptr| is not assigned. In other words,
* SPDYLAY_ERR_INVALID_HEADER_BLOCK means unpacking succeeded, but
* header block validation failed.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* SPDYLAY_ERR_INVALID_HEADER_BLOCK
* Unpacking succeeds but the header block is invalid. The
* possible reasons are: There are duplicate header names; or the
* header names are not encoded in US-ASCII character set and not
* lower cased; or the header name is zero-length string.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
int spdylay_frame_unpack_nv(char ***nv_ptr, spdylay_buffer *in,
size_t len_size);
/*
* Initializes SYN_STREAM frame |frame| with given values. |frame|
* takes ownership of |nv|, so caller must not free it. If stream_id
* is not assigned yet, it must be 0.
*/
void spdylay_frame_syn_stream_init(spdylay_syn_stream *frame,
uint16_t version, uint8_t flags,
int32_t stream_id, int32_t assoc_stream_id,
uint8_t pri, char **nv);
void spdylay_frame_syn_stream_free(spdylay_syn_stream *frame);
void spdylay_frame_syn_reply_init(spdylay_syn_reply *frame,
uint16_t version, uint8_t flags,
int32_t stream_id, char **nv);
void spdylay_frame_syn_reply_free(spdylay_syn_reply *frame);
void spdylay_frame_ping_init(spdylay_ping *frame, uint16_t version,
uint32_t unique_id);
void spdylay_frame_ping_free(spdylay_ping *frame);
/*
* Initializes GOAWAY frame |frame| with given values. The
* |status_code| is ignored if |version| == SPDYLAY_PROTO_SPDY2.
*/
void spdylay_frame_goaway_init(spdylay_goaway *frame, uint16_t version,
int32_t last_good_stream_id,
uint32_t status_code);
void spdylay_frame_goaway_free(spdylay_goaway *frame);
void spdylay_frame_headers_init(spdylay_headers *frame, uint16_t version,
uint8_t flags,
int32_t stream_id, char **nv);
void spdylay_frame_headers_free(spdylay_headers *frame);
void spdylay_frame_rst_stream_init(spdylay_rst_stream *frame,
uint16_t version,
int32_t stream_id, uint32_t status_code);
void spdylay_frame_rst_stream_free(spdylay_rst_stream *frame);
void spdylay_frame_window_update_init(spdylay_window_update *frame,
uint16_t version,
int32_t stream_id,
int32_t delta_window_size);
void spdylay_frame_window_update_free(spdylay_window_update *frame);
/*
* Initializes SETTINGS frame |frame| with given values. |frame| takes
* ownership of |iv|, so caller must not free it. The |flags| are
* bitwise-OR of one or more of spdylay_settings_flag.
*/
void spdylay_frame_settings_init(spdylay_settings *frame,
uint16_t version, uint8_t flags,
spdylay_settings_entry *iv, size_t niv);
void spdylay_frame_settings_free(spdylay_settings *frame);
/*
* Initializes CREDENTIAL frame |frame| with given values. This
* function takes ownership of |proof->data| and |certs| on success.
* Note that the ownership of |proof| is not taken.
*/
void spdylay_frame_credential_init(spdylay_credential *frame,
uint16_t version, uint16_t slot,
spdylay_mem_chunk *proof,
spdylay_mem_chunk *certs,
size_t ncerts);
void spdylay_frame_credential_free(spdylay_credential *frame);
void spdylay_frame_data_init(spdylay_data *frame, int32_t stream_id,
uint8_t flags,
const spdylay_data_provider *data_prd);
void spdylay_frame_data_free(spdylay_data *frame);
/*
* Returns 1 if the first byte of this frame indicates it is a control
* frame.
*/
int spdylay_frame_is_ctrl_frame(uint8_t first_byte);
/*
* Deallocates memory of name/value pair |nv|.
*/
void spdylay_frame_nv_del(char **nv);
/*
* Makes a deep copy of |nv| and returns the copy. This function
* returns the pointer to the copy if it succeeds, or NULL. To free
* allocated memory, use spdylay_frame_nv_del().
*/
char** spdylay_frame_nv_copy(const char **nv);
/*
* Sorts |nv| in the ascending order of name.
*/
void spdylay_frame_nv_sort(char **nv);
/*
* Makes names in |nv| lower cased.
*/
void spdylay_frame_nv_downcase(char **nv);
/*
* This function first makes a copy of |nv| using
* spdylay_frame_nv_copy(). If it succeeds, then call
* spdylay_frame_nv_downcase() and spdylay_frame_nv_sort() with the
* copied name/value pairs.
*
* This function returns the copied name/value pairs if it succeeds,
* or NULL.
*/
char** spdylay_frame_nv_norm_copy(const char **nv);
/*
* Translates the |nv| in SPDY/3 header names into SPDY/2.
*/
void spdylay_frame_nv_3to2(char **nv);
/*
* Translates the |nv| in SPDY/2 header names into SPDY/3.
*/
void spdylay_frame_nv_2to3(char **nv);
/*
* Assigns the members of the |origin| using ":scheme" and ":host"
* values in |nv|.
*
* If ":host" value contains ':', this function parses the chracters
* after ':' as integer and uses it as port number.
*
* If ':' is missing in :host value, the default port number is used.
* The only defined default port number is 443.
*
* This function returns 0 if it succeeds, or one of the following
* negative error code:
*
* SPDYLAY_ERR_INVALID_ARGUMENT
* The |nv| lacks either :scheme or :host, or both.
*/
int spdylay_frame_nv_set_origin(char **nv, spdylay_origin *origin);
/*
* Makes copy of |iv| and return the copy. The |niv| is the number of
* entries in |iv|. This function returns the pointer to the copy if
* it succeeds, or NULL.
*/
spdylay_settings_entry* spdylay_frame_iv_copy(const spdylay_settings_entry *iv,
size_t niv);
/*
* Sorts the |iv| with the ascending order of the settings_id member.
* The number of the element in the array pointed by the |iv| is given
* by the |niv|.
*/
void spdylay_frame_iv_sort(spdylay_settings_entry *iv, size_t niv);
/*
* Returns the offset of the name/header block in the frame, including
* frame header. If |type| is neither SPDYLAY_SYN_STREAM,
* SPDYLAY_SYN_REPLY nor SPDYLAY_HEADERS, this function returns -1.
* If |version| is unknown, this function returns -1.
*/
ssize_t spdylay_frame_nv_offset(spdylay_frame_type type, uint16_t version);
#endif /* SPDYLAY_FRAME_H */
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