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/* * ngtcp2 * * Copyright (c) 2017 ngtcp2 contributors * * 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 NGTCP2_CONV_H #define NGTCP2_CONV_H #ifdef HAVE_CONFIG_H # include <config.h> #endif /* HAVE_CONFIG_H */ #include <ngtcp2/ngtcp2.h> /* * ngtcp2_get_uint64 reads 8 bytes from |p| as 64 bits unsigned * integer encoded as network byte order, and returns it in host byte * order. */ uint64_t ngtcp2_get_uint64(const uint8_t *p); /* * ngtcp2_get_uint48 reads 6 bytes from |p| as 48 bits unsigned * integer encoded as network byte order, and returns it in host byte * order. */ uint64_t ngtcp2_get_uint48(const uint8_t *p); /* * ngtcp2_get_uint32 reads 4 bytes from |p| as 32 bits unsigned * integer encoded as network byte order, and returns it in host byte * order. */ uint32_t ngtcp2_get_uint32(const uint8_t *p); /* * ngtcp2_get_uint24 reads 3 bytes from |p| as 24 bits unsigned * integer encoded as network byte order, and returns it in host byte * order. */ uint32_t ngtcp2_get_uint24(const uint8_t *p); /* * ngtcp2_get_uint16 reads 2 bytes from |p| as 16 bits unsigned * integer encoded as network byte order, and returns it in host byte * order. */ uint16_t ngtcp2_get_uint16(const uint8_t *p); /* * ngtcp2_get_varint reads variable-length integer from |p|, and * returns it in host byte order. The number of bytes read is stored * in |*plen|. */ uint64_t ngtcp2_get_varint(size_t *plen, const uint8_t *p); /* * ngtcp2_get_pkt_num reads encoded packet number from |p|. The * packet number is encoed in |pkt_numlen| bytes. */ int64_t ngtcp2_get_pkt_num(const uint8_t *p, size_t pkt_numlen); /* * ngtcp2_put_uint64be writes |n| in host byte order in |p| in network * byte order. It returns the one beyond of the last written * position. */ uint8_t *ngtcp2_put_uint64be(uint8_t *p, uint64_t n); /* * ngtcp2_put_uint48be writes |n| in host byte order in |p| in network * byte order. It writes only least significant 48 bits. It returns * the one beyond of the last written position. */ uint8_t *ngtcp2_put_uint48be(uint8_t *p, uint64_t n); /* * ngtcp2_put_uint32be writes |n| in host byte order in |p| in network * byte order. It returns the one beyond of the last written * position. */ uint8_t *ngtcp2_put_uint32be(uint8_t *p, uint32_t n); /* * ngtcp2_put_uint24be writes |n| in host byte order in |p| in network * byte order. It writes only least significant 24 bits. It returns * the one beyond of the last written position. */ uint8_t *ngtcp2_put_uint24be(uint8_t *p, uint32_t n); /* * ngtcp2_put_uint16be writes |n| in host byte order in |p| in network * byte order. It returns the one beyond of the last written * position. */ uint8_t *ngtcp2_put_uint16be(uint8_t *p, uint16_t n); /* * ngtcp2_put_varint writes |n| in |p| using variable-length integer * encoding. It returns the one beyond of the last written position. */ uint8_t *ngtcp2_put_varint(uint8_t *p, uint64_t n); /* * ngtcp2_put_varint30 writes |n| in |p| using variable-length integer * encoding. |n| must be strictly less than 1073741824. The function * always encodes |n| in 4 bytes. It returns the one beyond of the * last written position. */ uint8_t *ngtcp2_put_varint30(uint8_t *p, uint32_t n); /* * ngtcp2_put_pkt_num encodes |pkt_num| using |len| bytes. It * returns the one beyond of the last written position. */ uint8_t *ngtcp2_put_pkt_num(uint8_t *p, int64_t pkt_num, size_t len); /* * ngtcp2_get_varint_len returns the required number of bytes to read * variable-length integer starting at |p|. */ size_t ngtcp2_get_varint_len(const uint8_t *p); /* * ngtcp2_put_varint_len returns the required number of bytes to * encode |n|. */ size_t ngtcp2_put_varint_len(uint64_t n); /* * ngtcp2_nth_server_bidi_id returns |n|-th server bidirectional * stream ID. If |n| is 0, it returns 0. If the |n|-th stream ID is * larger than NGTCP2_MAX_SERVER_STREAM_ID_BIDI, this function returns * NGTCP2_MAX_SERVER_STREAM_ID_BIDI. */ int64_t ngtcp2_nth_server_bidi_id(uint64_t n); /* * ngtcp2_nth_client_bidi_id returns |n|-th client bidirectional * stream ID. If |n| is 0, it returns 0. If the |n|-th stream ID is * larger than NGTCP2_MAX_CLIENT_STREAM_ID_BIDI, this function returns * NGTCP2_MAX_CLIENT_STREAM_ID_BIDI. */ int64_t ngtcp2_nth_client_bidi_id(uint64_t n); /* * ngtcp2_nth_server_uni_id returns |n|-th server unidirectional * stream ID. If |n| is 0, it returns 0. If the |n|-th stream ID is * larger than NGTCP2_MAX_SERVER_STREAM_ID_UNI, this function returns * NGTCP2_MAX_SERVER_STREAM_ID_UNI. */ int64_t ngtcp2_nth_server_uni_id(uint64_t n); /* * ngtcp2_nth_client_uni_id returns |n|-th client unidirectional * stream ID. If |n| is 0, it returns 0. If the |n|-th stream ID is * larger than NGTCP2_MAX_CLIENT_STREAM_ID_UNI, this function returns * NGTCP2_MAX_CLIENT_STREAM_ID_UNI. */ int64_t ngtcp2_nth_client_uni_id(uint64_t n); /* * ngtcp2_ord_stream_id returns the ordinal number of |stream_id|. */ uint64_t ngtcp2_ord_stream_id(int64_t stream_id); #endif /* NGTCP2_CONV_H */