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Updated doc

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This commit is contained in:
Tatsuhiro Tsujikawa 2012-02-21 23:56:51 +09:00
parent 11c83aae73
commit 33cd4b5946
2 changed files with 162 additions and 36 deletions
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30
lib/spdylay_frame.c
View File

@ -62,6 +62,21 @@ static void spdylay_frame_unpack_ctrl_hd(spdylay_ctrl_hd *hd,
hd->length = spdylay_get_uint32(&buf[4]) & SPDYLAY_LENGTH_MASK; hd->length = spdylay_get_uint32(&buf[4]) & SPDYLAY_LENGTH_MASK;
} }
/*
* 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.
*/
static ssize_t spdylay_frame_alloc_pack_nv(uint8_t **buf_ptr, static ssize_t spdylay_frame_alloc_pack_nv(uint8_t **buf_ptr,
size_t *buflen_ptr, size_t *buflen_ptr,
uint8_t **nvbuf_ptr, uint8_t **nvbuf_ptr,
@ -196,6 +211,21 @@ int spdylay_frame_unpack_nv(char ***nv_ptr, const uint8_t *in, size_t inlen)
return 0; return 0;
} }
/*
* Unpacks name/value pairs from buffer |in| with length |inlen|. The
* necessary memory area required for output is allocated and its
* pointer is assigned to |nv_ptr|. |inflatebuf| is used for inflate
* operation. |*nvbuf_ptr| is used for temporarily stored inflated
* name/value pair in wire format. It is expanded as necessary.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* SPDYLAY_ERR_ZLIB
* The inflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/
static int spdylay_frame_alloc_unpack_nv(char ***nv_ptr, static int spdylay_frame_alloc_unpack_nv(char ***nv_ptr,
spdylay_buffer *inflatebuf, spdylay_buffer *inflatebuf,
uint8_t **nvbuf_ptr, uint8_t **nvbuf_ptr,

168
lib/spdylay_frame.h
View File

@ -54,10 +54,16 @@
* |*buf_ptr|, |*buflen_ptr|, |*nvbuf_ptr| and |*nvbuflen_ptr| are * |*buf_ptr|, |*buflen_ptr|, |*nvbuf_ptr| and |*nvbuflen_ptr| are
* updated accordingly. * updated accordingly.
* *
* This function returns the size of * frame->hd.length is assigned after length is determined during
* packed frame if it succeeds, or returns negative error * packing process.
* code. 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_ZLIB
* The deflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/ */
ssize_t spdylay_frame_pack_syn_stream(uint8_t **buf_ptr, ssize_t spdylay_frame_pack_syn_stream(uint8_t **buf_ptr,
size_t *buflen_ptr, size_t *buflen_ptr,
@ -77,7 +83,15 @@ ssize_t spdylay_frame_pack_syn_stream(uint8_t **buf_ptr,
* inflated name/value pairs. This function expands |*nvbuf_ptr| as * inflated name/value pairs. This function expands |*nvbuf_ptr| as
* necessary and updates these variables. * necessary and updates these variables.
* *
* This function returns 0 if it succeeds or negative error code. * 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_ZLIB
* The inflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/ */
int spdylay_frame_unpack_syn_stream(spdylay_syn_stream *frame, int spdylay_frame_unpack_syn_stream(spdylay_syn_stream *frame,
spdylay_buffer *inflatebuf, spdylay_buffer *inflatebuf,
@ -96,10 +110,18 @@ int spdylay_frame_unpack_syn_stream(spdylay_syn_stream *frame,
* frame and name/value pairs. When expansion occurred, memory * frame and name/value pairs. When expansion occurred, memory
* previously pointed by |*buf_ptr| and |*nvbuf_ptr| is freed. * previously pointed by |*buf_ptr| and |*nvbuf_ptr| is freed.
* |*buf_ptr|, |*buflen_ptr|, |*nvbuf_ptr| and |*nvbuflen_ptr| are * |*buf_ptr|, |*buflen_ptr|, |*nvbuf_ptr| and |*nvbuflen_ptr| are
* updated accordingly. This function returns the size of packed * updated accordingly.
* frame it it succeeds, or returns negative error *
* code. frame->hd.length is assigned after length is determined * frame->hd.length is assigned after length is determined during
* during packing process. * packing process.
*
* This function returns the size of packed frame if it succeeds, or
* returns one of the following negative error codes:
*
* SPDYLAY_ERR_ZLIB
* The deflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/ */
ssize_t spdylay_frame_pack_syn_reply(uint8_t **buf_ptr, ssize_t spdylay_frame_pack_syn_reply(uint8_t **buf_ptr,
size_t *buflen_ptr, size_t *buflen_ptr,
@ -117,7 +139,15 @@ ssize_t spdylay_frame_pack_syn_reply(uint8_t **buf_ptr,
* inflated name/value pairs. This function expands |*nvbuf_ptr| as * inflated name/value pairs. This function expands |*nvbuf_ptr| as
* necessary and updates these variables. * necessary and updates these variables.
* *
* This function returns 0 if it succeeds or negative error code. * 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_ZLIB
* The inflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/ */
int spdylay_frame_unpack_syn_reply(spdylay_syn_reply *frame, int spdylay_frame_unpack_syn_reply(spdylay_syn_reply *frame,
spdylay_buffer *inflatebuf, spdylay_buffer *inflatebuf,
@ -131,15 +161,25 @@ int spdylay_frame_unpack_syn_reply(spdylay_syn_reply *frame,
* Packs PING frame |frame| in wire format and store it in * Packs PING frame |frame| in wire format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr| * |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store * length. This function expands |*buf_ptr| as necessary to store
* given |frame|. This function returns the size of packed frame if it * given |frame|.
* succeeds, or negative error code. *
* 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, ssize_t spdylay_frame_pack_ping(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_ping *frame); spdylay_ping *frame);
/* /*
* Unpacks PING wire format into |frame|. This function returns 0 if * Unpacks PING wire format into |frame|.
* it succeeds, or negative error code. *
* 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, int spdylay_frame_unpack_ping(spdylay_ping *frame,
const uint8_t *head, size_t headlen, const uint8_t *head, size_t headlen,
@ -149,15 +189,25 @@ int spdylay_frame_unpack_ping(spdylay_ping *frame,
* Packs GOAWAY frame |frame | in wire format and store it in * Packs GOAWAY frame |frame | in wire format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr| * |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store * length. This function expands |*buf_ptr| as necessary to store
* given |frame|. This function returns the size of packed frame if it * given |frame|.
* succeeds, or negative error code. *
* 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_goaway(uint8_t **buf_ptr, size_t *buflen_ptr, ssize_t spdylay_frame_pack_goaway(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_goaway *frame); spdylay_goaway *frame);
/* /*
* Unpacks GOAWAY wire format into |frame|. This function returns 0 if * Unpacks GOAWAY wire format into |frame|.
* it succeeds, or negative error code. *
* 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_goaway(spdylay_goaway *frame, int spdylay_frame_unpack_goaway(spdylay_goaway *frame,
const uint8_t *head, size_t headlen, const uint8_t *head, size_t headlen,
@ -172,10 +222,18 @@ int spdylay_frame_unpack_goaway(spdylay_goaway *frame,
* frame and name/value pairs. When expansion occurred, memory * frame and name/value pairs. When expansion occurred, memory
* previously pointed by |*buf_ptr| and |*nvbuf_ptr| is freed. * previously pointed by |*buf_ptr| and |*nvbuf_ptr| is freed.
* |*buf_ptr|, |*buflen_ptr|, |*nvbuf_ptr| and |*nvbuflen_ptr| are * |*buf_ptr|, |*buflen_ptr|, |*nvbuf_ptr| and |*nvbuflen_ptr| are
* updated accordingly. This function returns the size of packed * updated accordingly.
* frame it it succeeds, or returns negative error *
* code. frame->hd.length is assigned after length is determined * frame->hd.length is assigned after length is determined during
* during packing process. * packing process.
*
* This function returns the size of packed frame if it succeeds, or
* returns one of the following negative error codes:
*
* 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, ssize_t spdylay_frame_pack_headers(uint8_t **buf_ptr, size_t *buflen_ptr,
uint8_t **nvbuf_ptr, size_t *nvbuflen_ptr, uint8_t **nvbuf_ptr, size_t *nvbuflen_ptr,
@ -191,7 +249,15 @@ ssize_t spdylay_frame_pack_headers(uint8_t **buf_ptr, size_t *buflen_ptr,
* inflated name/value pairs. This function expands |*nvbuf_ptr| as * inflated name/value pairs. This function expands |*nvbuf_ptr| as
* necessary and updates these variables. * necessary and updates these variables.
* *
* This function returns 0 if it succeeds or negative error code. * 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_ZLIB
* The inflate operation failed.
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/ */
int spdylay_frame_unpack_headers(spdylay_headers *frame, int spdylay_frame_unpack_headers(spdylay_headers *frame,
spdylay_buffer *inflatebuf, spdylay_buffer *inflatebuf,
@ -206,15 +272,25 @@ int spdylay_frame_unpack_headers(spdylay_headers *frame,
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr| * |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store * length. This function expands |*buf_ptr| as necessary to store
* given |frame|. In spdy/2 spc, RST_STREAM wire format is always 16 * given |frame|. In spdy/2 spc, RST_STREAM wire format is always 16
* bytes long. This function returns the size of packed frame if it * bytes long.
* succeeds, or negative error code. *
* 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, ssize_t spdylay_frame_pack_rst_stream(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_rst_stream *frame); spdylay_rst_stream *frame);
/* /*
* Unpacks RST_STREAM frame byte sequence into |frame|. This function * Unpacks RST_STREAM frame byte sequence into |frame|.
* returns 0 if it succeeds, or negative error code. *
* 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, int spdylay_frame_unpack_rst_stream(spdylay_rst_stream *frame,
const uint8_t *head, size_t headlen, const uint8_t *head, size_t headlen,
@ -224,15 +300,27 @@ int spdylay_frame_unpack_rst_stream(spdylay_rst_stream *frame,
* Packs SETTINGS frame |frame| in wire format and store it in * Packs SETTINGS frame |frame| in wire format and store it in
* |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr| * |*buf_ptr|. The capacity of |*buf_ptr| is |*buflen_ptr|
* length. This function expands |*buf_ptr| as necessary to store * length. This function expands |*buf_ptr| as necessary to store
* given |frame|. This function returns the size of packed frame if it * given |frame|.
* succeeds, or negative error code. *
* 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_settings(uint8_t **buf_ptr, size_t *buflen_ptr, ssize_t spdylay_frame_pack_settings(uint8_t **buf_ptr, size_t *buflen_ptr,
spdylay_settings *frame); spdylay_settings *frame);
/* /*
* Unpacks SETTINGS wire format into |frame|. This function returns 0 * Unpacks SETTINGS wire format into |frame|.
* if it succeeds, or negative error code. *
* 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_settings(spdylay_settings *frame, int spdylay_frame_unpack_settings(spdylay_settings *frame,
const uint8_t *head, size_t headlen, const uint8_t *head, size_t headlen,
@ -242,8 +330,7 @@ int spdylay_frame_unpack_settings(spdylay_settings *frame,
* Returns number of bytes to pack name/value pairs |nv|. This * Returns number of bytes to pack name/value pairs |nv|. This
* function expects |nv| is sorted in ascending order of key. This * function expects |nv| is sorted in ascending order of key. This
* function can handles duplicate keys and concatenation of thier * function can handles duplicate keys and concatenation of thier
* values with '\0'. This function returns 0 if it succeeds, or * values with '\0'.
* negative error code.
*/ */
size_t spdylay_frame_count_nv_space(char **nv); size_t spdylay_frame_count_nv_space(char **nv);
@ -275,7 +362,11 @@ ssize_t spdylay_frame_pack_nv(uint8_t *buf, char **nv);
* (N*2+1)*sizeof(char*)+sum(strlen(name)+1+strlen(value)+1){for each * (N*2+1)*sizeof(char*)+sum(strlen(name)+1+strlen(value)+1){for each
* name/value pair}. * name/value pair}.
* *
* This function returns 0 if it succeeds, or negative error code. * 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 int spdylay_frame_count_unpack_nv_space
(size_t *num_nv_ptr, size_t *buf_size_ptr, const uint8_t *in, size_t inlen); (size_t *num_nv_ptr, size_t *buf_size_ptr, const uint8_t *in, size_t inlen);
@ -283,8 +374,13 @@ int spdylay_frame_count_unpack_nv_space
/* /*
* Unpacks name/value pairs in wire format |in| with length |inlen| * Unpacks name/value pairs in wire format |in| with length |inlen|
* and stores them in |*nv_ptr|. Thif function allocates enough * and stores them in |*nv_ptr|. Thif function allocates enough
* memory to store name/value pairs in |*nv_ptr|. This function * memory to store name/value pairs in |*nv_ptr|.
* returns 0 if it succeeds, or negative error code. *
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* SPDYLAY_ERR_NOMEM
* Out of memory.
*/ */
int spdylay_frame_unpack_nv(char ***nv_ptr, const uint8_t *in, size_t inlen); int spdylay_frame_unpack_nv(char ***nv_ptr, const uint8_t *in, size_t inlen);