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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 */
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif /* HAVE_ARPA_INET_H */
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif /* HAVE_NETINET_IN_H */
#ifdef HAVE_BYTESWAP_H
# include <byteswap.h>
#endif /* HAVE_BYTESWAP_H */
#ifdef HAVE_ENDIAN_H
# include <endian.h>
#endif /* HAVE_ENDIAN_H */
#ifdef HAVE_SYS_ENDIAN_H
# include <sys/endian.h>
#endif /* HAVE_SYS_ENDIAN_H */
#include <ngtcp2/ngtcp2.h>
#if defined HAVE_BSWAP_64 || HAVE_DECL_BSWAP_64
# define ngtcp2_bswap64 bswap_64
#else /* !HAVE_BSWAP_64 */
# define ngtcp2_bswap64(N) \
((uint64_t)(ntohl((uint32_t)(N))) << 32 | ntohl((uint32_t)((N) >> 32)))
#endif /* !HAVE_BSWAP_64 */
#if defined HAVE_BE64TOH || HAVE_DECL_BE64TOH
# define ngtcp2_ntohl64(N) be64toh(N)
# define ngtcp2_htonl64(N) htobe64(N)
#else /* !HAVE_BE64TOH */
# if defined WORDS_BIGENDIAN
# define ngtcp2_ntohl64(N) (N)
# define ngtcp2_htonl64(N) (N)
# else /* !WORDS_BIGENDIAN */
# define ngtcp2_ntohl64(N) ngtcp2_bswap64(N)
# define ngtcp2_htonl64(N) ngtcp2_bswap64(N)
# endif /* !WORDS_BIGENDIAN */
#endif /* !HAVE_BE64TOH */
#if defined(WIN32)
/* Windows requires ws2_32 library for ntonl family functions. We
define inline functions for those function so that we don't have
dependeny on that lib. */
# ifdef _MSC_VER
# define STIN static __inline
# else
# define STIN static inline
# endif
STIN uint32_t ngtcp2_htonl(uint32_t hostlong) {
uint32_t res;
unsigned char *p = (unsigned char *)&res;
*p++ = hostlong >> 24;
*p++ = (hostlong >> 16) & 0xffu;
*p++ = (hostlong >> 8) & 0xffu;
*p = hostlong & 0xffu;
return res;
}
STIN uint16_t ngtcp2_htons(uint16_t hostshort) {
uint16_t res;
unsigned char *p = (unsigned char *)&res;
*p++ = hostshort >> 8;
*p = hostshort & 0xffu;
return res;
}
STIN uint32_t ngtcp2_ntohl(uint32_t netlong) {
uint32_t res;
unsigned char *p = (unsigned char *)&netlong;
res = *p++ << 24;
res += *p++ << 16;
res += *p++ << 8;
res += *p;
return res;
}
STIN uint16_t ngtcp2_ntohs(uint16_t netshort) {
uint16_t res;
unsigned char *p = (unsigned char *)&netshort;
res = *p++ << 8;
res += *p;
return res;
}
#else /* !WIN32 */
# define ngtcp2_htonl htonl
# define ngtcp2_htons htons
# define ngtcp2_ntohl ntohl
# define ngtcp2_ntohs ntohs
#endif /* !WIN32 */
/*
* 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_varint14 writes |n| in |p| using variable-length integer
* encoding. |n| must be strictly less than 16384. The function
* always encodes |n| in 2 bytes. It returns the one beyond of the
* last written position.
*/
uint8_t *ngtcp2_put_varint14(uint8_t *p, uint16_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 */
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