/* * 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 #endif /* HAVE_CONFIG_H */ #include #include "spdylay_zlib.h" #include "spdylay_buffer.h" #define SPDYLAY_STREAM_ID_MASK 0x7fffffff #define SPDYLAY_LENGTH_MASK 0xffffff #define SPDYLAY_VERSION_MASK 0x7fff /* 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 /* * 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_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|. Header is * given in head and headlen. In spdy/2 spec, headlen is 8 * bytes. |payload| is the data after length field of the header. * * |inflatebuf| is used to buffer name/value pairs while inflating * them using |inflater|. The caller must reset |inflatebuf| before * the call. |*nvbuf_ptr|, |*nvbuflen_ptr| is used to store temporal * inflated name/value pairs. This function expands |*nvbuf_ptr| as * necessary and updates these variables. * * 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, spdylay_buffer *inflatebuf, uint8_t **nvbuf_ptr, size_t *nvbuflen_ptr, const uint8_t *head, size_t headlen, const uint8_t *payload, size_t payloadlen, spdylay_zlib *inflater); /* * 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_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|. * * |inflatebuf| is used to buffer name/value pairs while inflating * them using |inflater|. The caller must reset |inflatebuf| before * the call. |*nvbuf_ptr|, |*nvbuflen_ptr| is used to store temporal * inflated name/value pairs. This function expands |*nvbuf_ptr| as * necessary and updates these variables. * * 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, spdylay_buffer *inflatebuf, uint8_t **nvbuf_ptr, size_t *nvbuflen_ptr, const uint8_t *head, size_t headlen, const uint8_t *payload, size_t payloadlen, spdylay_zlib *inflater); /* * 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_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_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_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|. * * |inflatebuf| is used to buffer name/value pairs while inflating * them using |inflater|. The caller must reset |inflatebuf| before * the call. |*nvbuf_ptr|, |*nvbuflen_ptr| is used to store temporal * inflated name/value pairs. This function expands |*nvbuf_ptr| as * necessary and updates these variables. * * 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, spdylay_buffer *inflatebuf, uint8_t **nvbuf_ptr, size_t *nvbuflen_ptr, const uint8_t *head, size_t headlen, const uint8_t *payload, size_t payloadlen, spdylay_zlib *inflater); /* * 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 spc, 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 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_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_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); /* * Returns number of bytes to pack name/value pairs |nv|. This * function expects |nv| is sorted in ascending order of key. This * function can handles duplicate keys and concatenation of thier * values with '\0'. */ size_t spdylay_frame_count_nv_space(char **nv); /* * Packs name/value pairs in |nv| in |buf|. |buf| must have at least * spdylay_frame_count_nv_space(nv) bytes. */ ssize_t spdylay_frame_pack_nv(uint8_t *buf, char **nv); /* * Counts number of name/value pair in |in| and computes length of * buffers to store unpacked name/value pair and store them in * |*num_nv_ptr| and |*buf_size_ptr| respectively. We use folloing * data structure in |*buf_size_ptr|. 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, |*buf_size_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 *num_nv_ptr, size_t *buf_size_ptr, const uint8_t *in, size_t inlen); /* * Unpacks name/value pairs in wire format |in| with length |inlen| * and stores them in |*nv_ptr|. Thif function allocates enough * memory to store name/value pairs in |*nv_ptr|. * * 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); /* * 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, 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, 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, uint32_t unique_id); void spdylay_frame_ping_free(spdylay_ping *frame); void spdylay_frame_goaway_init(spdylay_goaway *frame, int32_t last_good_stream_id); void spdylay_frame_goaway_free(spdylay_goaway *frame); void spdylay_frame_headers_init(spdylay_headers *frame, 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, int32_t stream_id, uint32_t status_code); void spdylay_frame_rst_stream_free(spdylay_rst_stream *frame); /* * Initializes SETTINGS frame |frame| with given values. |frame| takes * ownership of |iv|, so caller must not free it. */ void spdylay_frame_settings_init(spdylay_settings *frame, uint8_t flags, spdylay_settings_entry *iv, size_t niv); void spdylay_frame_settings_free(spdylay_settings *frame); void spdylay_frame_data_init(spdylay_data *frame, int32_t stream_id, uint8_t flags, 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); /* * 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); #endif /* SPDYLAY_FRAME_H */