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/*
* nghttp3
*
* Copyright (c) 2019 nghttp3 contributors
* 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 NGHTTP3_CONV_H
#define NGHTTP3_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 <nghttp3/nghttp3.h>
#if defined(HAVE_BSWAP_64) || \
(defined(HAVE_DECL_BSWAP_64) && HAVE_DECL_BSWAP_64 > 0)
# define nghttp3_bswap64 bswap_64
#else /* !HAVE_BSWAP_64 */
# define nghttp3_bswap64(N) \
((uint64_t)(ntohl((uint32_t)(N))) << 32 | ntohl((uint32_t)((N) >> 32)))
#endif /* !HAVE_BSWAP_64 */
#if defined(HAVE_BE64TOH) || \
(defined(HAVE_DECL_BE64TOH) && HAVE_DECL_BE64TOH > 0)
# define nghttp3_ntohl64(N) be64toh(N)
# define nghttp3_htonl64(N) htobe64(N)
#else /* !HAVE_BE64TOH */
# if defined(WORDS_BIGENDIAN)
# define nghttp3_ntohl64(N) (N)
# define nghttp3_htonl64(N) (N)
# else /* !WORDS_BIGENDIAN */
# define nghttp3_ntohl64(N) nghttp3_bswap64(N)
# define nghttp3_htonl64(N) nghttp3_bswap64(N)
# endif /* !WORDS_BIGENDIAN */
#endif /* !HAVE_BE64TOH */
#if defined(WIN32)
/* Windows requires ws2_32 library for ntonl family of functions. We
define inline functions for those functions so that we don't have
dependency on that lib. */
# ifdef _MSC_VER
# define STIN static __inline
# else
# define STIN static inline
# endif
STIN uint32_t htonl(uint32_t hostlong) {
uint32_t res;
unsigned char *p = (unsigned char *)&res;
*p++ = (unsigned char)(hostlong >> 24);
*p++ = (hostlong >> 16) & 0xffu;
*p++ = (hostlong >> 8) & 0xffu;
*p = hostlong & 0xffu;
return res;
}
STIN uint16_t htons(uint16_t hostshort) {
uint16_t res;
unsigned char *p = (unsigned char *)&res;
*p++ = (unsigned char)(hostshort >> 8);
*p = hostshort & 0xffu;
return res;
}
STIN uint32_t 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 ntohs(uint16_t netshort) {
uint16_t res;
unsigned char *p = (unsigned char *)&netshort;
res = *p++ << 8;
res += *p;
return res;
}
#endif /* WIN32 */
/*
* nghttp3_get_varint reads variable-length integer from |p|, and
* returns it in host byte order. The number of bytes read is stored
* in |*plen|.
*/
int64_t nghttp3_get_varint(size_t *plen, const uint8_t *p);
/*
* nghttp3_get_varint_fb reads first byte of encoded variable-length
* integer from |p|.
*/
int64_t nghttp3_get_varint_fb(const uint8_t *p);
/*
* nghttp3_get_varint_len returns the required number of bytes to read
* variable-length integer starting at |p|.
*/
size_t nghttp3_get_varint_len(const uint8_t *p);
/*
* nghttp3_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 *nghttp3_put_uint64be(uint8_t *p, uint64_t n);
/*
* nghttp3_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 *nghttp3_put_uint48be(uint8_t *p, uint64_t n);
/*
* nghttp3_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 *nghttp3_put_uint32be(uint8_t *p, uint32_t n);
/*
* nghttp3_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 *nghttp3_put_uint24be(uint8_t *p, uint32_t n);
/*
* nghttp3_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 *nghttp3_put_uint16be(uint8_t *p, uint16_t n);
/*
* nghttp3_put_varint writes |n| in |p| using variable-length integer
* encoding. It returns the one beyond of the last written position.
*/
uint8_t *nghttp3_put_varint(uint8_t *p, int64_t n);
/*
* nghttp3_put_varint_len returns the required number of bytes to
* encode |n|.
*/
size_t nghttp3_put_varint_len(int64_t n);
/*
* nghttp3_ord_stream_id returns the ordinal number of |stream_id|.
*/
uint64_t nghttp3_ord_stream_id(int64_t stream_id);
/*
* NGHTTP3_PRI_INC_MASK is a bit mask to retrieve incremental bit from
* a value produced by nghttp3_pri_to_uint8.
*/
#define NGHTTP3_PRI_INC_MASK (1 << 7)
/*
* nghttp3_pri_to_uint8 encodes |pri| into uint8_t variable.
*/
uint8_t nghttp3_pri_to_uint8(const nghttp3_pri *pri);
/*
* nghttp3_pri_uint8_urgency extracts urgency from |PRI| which is
* supposed to be constructed by nghttp3_pri_to_uint8.
*/
#define nghttp3_pri_uint8_urgency(PRI) \
((uint32_t)((PRI) & ~NGHTTP3_PRI_INC_MASK))
/*
* nghttp3_pri_uint8_inc extracts inc from |PRI| which is supposed to
* be constructed by nghttp3_pri_to_uint8.
*/
#define nghttp3_pri_uint8_inc(PRI) (((PRI)&NGHTTP3_PRI_INC_MASK) != 0)
#endif /* NGHTTP3_CONV_H */
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