304 lines
12 KiB
C
304 lines
12 KiB
C
/*
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* Spdylay - SPDY Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef SPDYLAY_FRAME_H
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#define SPDYLAY_FRAME_H
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <spdylay/spdylay.h>
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#include "spdylay_zlib.h"
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#include "spdylay_buffer.h"
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#define SPDYLAY_STREAM_ID_MASK 0x7fffffff
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#define SPDYLAY_LENGTH_MASK 0xffffff
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#define SPDYLAY_VERSION_MASK 0x7fff
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#define SPDYLAY_DATA_FRAME_LENGTH 4096
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/* The number of bytes of frame header. */
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#define SPDYLAY_FRAME_HEAD_LENGTH 8
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/*
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* Packs SYN_STREAM frame |frame| in wire frame format and store it in
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* |*buf_ptr|. This function allocates enough memory to store given
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* frame in |*buf_ptr|. This function returns the size of packed
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* frame if it succeeds, or returns negative error
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* code. frame->hd.length is assigned after length is determined
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* during packing process.
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*/
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ssize_t spdylay_frame_pack_syn_stream(uint8_t **buf_ptr,
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spdylay_syn_stream *frame,
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spdylay_zlib *deflater);
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/*
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* Unpacks SYN_STREAM frame byte sequence into |frame|. Header is
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* given in head and headlen. In spdy/2 spec, headlen is 8
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* bytes. |payload| is the data after length field of the header.
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* This function returns 0 if it succeeds or negative error code.
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*/
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int spdylay_frame_unpack_syn_stream(spdylay_syn_stream *frame,
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const uint8_t *head, size_t headlen,
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const uint8_t *payload, size_t payloadlen,
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spdylay_zlib *inflater);
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/*
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* Packs SYN_REPLY frame |frame| in wire frame format and store it in
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* |*buf_ptr|. This function allocates enough memory to store given
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* frame in |*buf_ptr|. This function returns the size of packed frame
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* it it succeeds, or returns negative error code. frame->hd.length is
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* assigned after length is determined during packing process.
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*/
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ssize_t spdylay_frame_pack_syn_reply(uint8_t **buf_ptr,
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spdylay_syn_reply *frame,
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spdylay_zlib *deflater);
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/*
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* Unpacks SYN_REPLY frame byte sequence into |frame|. This function
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* returns 0 if it succeeds or negative error code.
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*/
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int spdylay_frame_unpack_syn_reply(spdylay_syn_reply *frame,
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const uint8_t *head, size_t headlen,
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const uint8_t *payload, size_t payloadlen,
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spdylay_zlib *inflater);
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/*
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* Packs PING frame |frame| in wire format and store it in
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* |*buf_ptr|. This function allocates enough memory in |*buf_ptr| to
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* store given |frame|. This function returns the size of packed frame
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* if it succeeds, or negative error code.
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*/
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ssize_t spdylay_frame_pack_ping(uint8_t **buf_ptr, spdylay_ping *frame);
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/*
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* Unpacks PING wire format into |frame|. This function returns 0 if
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* it succeeds, or negative error code.
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*/
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int spdylay_frame_unpack_ping(spdylay_ping *frame,
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const uint8_t *head, size_t headlen,
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const uint8_t *payload, size_t payloadlen);
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/*
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* Packs GOAWAY frame |frame | in wire format and store it in
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* |*buf_ptr|. This function allocates enough memory in |*buf_ptr| to
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* store given |frame|. This function returns the size of packed frame
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* if it succeeds, or negative error code.
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*/
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ssize_t spdylay_frame_pack_goaway(uint8_t **buf_ptr, spdylay_goaway *frame);
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/*
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* Unpacks GOAWAY wire format into |frame|. This function returns 0 if
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* it succeeds, or negative error code.
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*/
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int spdylay_frame_unpack_goaway(spdylay_goaway *frame,
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const uint8_t *head, size_t headlen,
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const uint8_t *payload, size_t payloadlen);
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/*
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* Packs HEADERS frame |frame| in wire format and store it in
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* |*buf_ptr|. This function allocates enough memory in |*buf_ptr| to
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* store given |frame|. This function returns the size of packed frame
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* it it succeeds, or returns negative error code. frame->hd.length is
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* assigned after length is determined during packing process.
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*/
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ssize_t spdylay_frame_pack_headers(uint8_t **buf_ptr,
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spdylay_headers *frame,
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spdylay_zlib *deflater);
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/*
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* Unpacks HEADERS wire format into |frame|. This function returns 0
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* if it succeeds or negative error code.
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*/
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int spdylay_frame_unpack_headers(spdylay_headers *frame,
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const uint8_t *head, size_t headlen,
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const uint8_t *payload, size_t payloadlen,
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spdylay_zlib *inflater);
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/*
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* Packs RST_STREAM frame |frame| in wire frame format and store it in
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* |*buf_ptr|. This function allocates enough memory to store given
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* frame in |*buf_ptr|. In spdy/2 spc, RST_STREAM wire format is
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* always 16 bytes long. This function returns the size of packed
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* frame if it succeeds, or negative error code.
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*/
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ssize_t spdylay_frame_pack_rst_stream(uint8_t **buf_ptr,
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spdylay_rst_stream *frame);
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/*
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* Unpacks RST_STREAM frame byte sequence into |frame|. This function
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* returns 0 if it succeeds, or negative error code.
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*/
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int spdylay_frame_unpack_rst_stream(spdylay_rst_stream *frame,
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const uint8_t *head, size_t headlen,
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const uint8_t *payload, size_t payloadlen);
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/*
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* Packs SETTINGS frame |frame| in wire format and store it in
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* |*buf_ptr|. This function allocates enough memory to store given
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* frame in |*buf_ptr|. This function returns the size of packed frame
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* if it succeeds, or negative error code.
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*/
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ssize_t spdylay_frame_pack_settings(uint8_t **buf_ptr, spdylay_settings *frame);
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/*
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* Unpacks SETTINGS wire format into |frame|. This function returns 0
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* if it succeeds, or negative error code.
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*/
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int spdylay_frame_unpack_settings(spdylay_settings *frame,
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const uint8_t *head, size_t headlen,
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const uint8_t *payload, size_t payloadlen);
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/*
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* Returns number of bytes to pack name/value pairs |nv|. This
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* function expects |nv| is sorted in ascending order of key. This
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* function can handles duplicate keys and concatenation of thier
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* values with '\0'.
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*/
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size_t spdylay_frame_count_nv_space(char **nv);
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/*
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* Packs name/value pairs in |nv| in |buf|. |buf| must have at least
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* spdylay_frame_count_nv_space(nv) bytes.
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*/
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ssize_t spdylay_frame_pack_nv(uint8_t *buf, char **nv);
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/*
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* Counts number of name/value pair in |in| and computes length of
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* buffers to store unpacked name/value pair and store them in
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* |*num_nv_ptr| and |*buf_size_ptr| respectively. We use folloing
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* data structure in |*buf_size_ptr|. First part of the data is array
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* of pointer to name/value pair. Supporse the buf pointer points to
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* the data region and N is the number of name/value pair. First
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* (N*2+1)*sizeof(char*) bytes contain array of pointer to name/value
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* pair and terminating NULL. Each pointer to name/value pair points
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* to the string in remaining data. For each name/value pair, the
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* name is copied to the remaining data with terminating NULL
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* character. The value is also copied to the position after the data
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* with terminating NULL character. The corresponding index is
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* assigned to these pointers. If the value contains multiple values
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* (delimited by single NULL), for each such data, corresponding index
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* is assigned to name/value pointers. In this case, the name string
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* is reused.
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*
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* With the above stragety, |*buf_size_ptr| is calculated as
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* (N*2+1)*sizeof(char*)+sum(strlen(name)+1+strlen(value)+1){for each
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* name/value pair}.
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*
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* This function returns 0 if it succeeds, or negative error code.
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*/
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int spdylay_frame_count_unpack_nv_space
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(size_t *num_nv_ptr, size_t *buf_size_ptr, const uint8_t *in, size_t inlen);
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/*
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* Unpacks name/value pairs in wire format |in| with length |inlen|
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* and stores them in |*nv_ptr|. Thif function allocates enough
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* memory to store name/value pairs in |*nv_ptr|. This function
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* returns 0 if it succeeds, or negative error code.
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*/
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int spdylay_frame_unpack_nv(char ***nv_ptr, const uint8_t *in, size_t inlen);
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/*
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* Initializes SYN_STREAM frame |frame| with given values. |frame|
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* takes ownership of |nv|, so caller must not free it. If stream_id
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* is not assigned yet, it must be 0.
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*/
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void spdylay_frame_syn_stream_init(spdylay_syn_stream *frame, uint8_t flags,
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int32_t stream_id, int32_t assoc_stream_id,
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uint8_t pri, char **nv);
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void spdylay_frame_syn_stream_free(spdylay_syn_stream *frame);
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void spdylay_frame_syn_reply_init(spdylay_syn_reply *frame, uint8_t flags,
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int32_t stream_id, char **nv);
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void spdylay_frame_syn_reply_free(spdylay_syn_reply *frame);
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void spdylay_frame_ping_init(spdylay_ping *frame, uint32_t unique_id);
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void spdylay_frame_ping_free(spdylay_ping *frame);
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void spdylay_frame_goaway_init(spdylay_goaway *frame,
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int32_t last_good_stream_id);
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void spdylay_frame_goaway_free(spdylay_goaway *frame);
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void spdylay_frame_headers_init(spdylay_headers *frame, uint8_t flags,
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int32_t stream_id, char **nv);
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void spdylay_frame_headers_free(spdylay_headers *frame);
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void spdylay_frame_rst_stream_init(spdylay_rst_stream *frame,
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int32_t stream_id, uint32_t status_code);
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void spdylay_frame_rst_stream_free(spdylay_rst_stream *frame);
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/*
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* Initializes SETTINGS frame |frame| with given values. |frame| takes
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* ownership of |iv|, so caller must not free it.
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*/
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void spdylay_frame_settings_init(spdylay_settings *frame, uint8_t flags,
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spdylay_settings_entry *iv, size_t niv);
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void spdylay_frame_settings_free(spdylay_settings *frame);
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void spdylay_frame_data_init(spdylay_data *frame, int32_t stream_id,
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spdylay_data_provider *data_prd);
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void spdylay_frame_data_free(spdylay_data *frame);
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/*
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* Returns 1 if the first byte of this frame indicates it is a control
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* frame.
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*/
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int spdylay_frame_is_ctrl_frame(uint8_t first_byte);
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/*
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* Deallocates memory of name/value pair |nv|.
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*/
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void spdylay_frame_nv_del(char **nv);
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/*
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* Makes a deep copy of |nv| and returns the copy. This function
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* returns the pointer to the copy if it succeeds, or NULL. To free
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* allocated memory, use spdylay_frame_nv_del().
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*/
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char** spdylay_frame_nv_copy(const char **nv);
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/*
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* Sorts |nv| in the ascending order of name.
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*/
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void spdylay_frame_nv_sort(char **nv);
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/*
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* Makes copy of |iv| and return the copy. The |niv| is the number of
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* entries in |iv|. This function returns the pointer to the copy if
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* it succeeds, or NULL.
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*/
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spdylay_settings_entry* spdylay_frame_iv_copy(const spdylay_settings_entry *iv,
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size_t niv);
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#endif /* SPDYLAY_FRAME_H */
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