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Diffstat (limited to 'lib/nghttp3_conv.h')
| -rw-r--r-- | lib/nghttp3_conv.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/lib/nghttp3_conv.h b/lib/nghttp3_conv.h new file mode 100644 index 0000000..516013a --- /dev/null +++ b/lib/nghttp3_conv.h @@ -0,0 +1,207 @@ +/* + * 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_varintlen returns the required number of bytes to read + * variable-length integer starting at |p|. + */ +size_t nghttp3_get_varintlen(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_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_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_varintlen returns the required number of bytes to + * encode |n|. + */ +size_t nghttp3_put_varintlen(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 */ |