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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:24:08 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:24:08 +0000 |
commit | f449f278dd3c70e479a035f50a9bb817a9b433ba (patch) | |
tree | 8ca2bfb785dda9bb4d573acdf9b42aea9cd51383 /src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_str.c | |
parent | Initial commit. (diff) | |
download | knot-upstream.tar.xz knot-upstream.zip |
Adding upstream version 3.2.6.upstream/3.2.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_str.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_str.c b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_str.c new file mode 100644 index 0000000..a61636d --- /dev/null +++ b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_str.c @@ -0,0 +1,233 @@ +/* + * 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. + */ +#include "ngtcp2_str.h" + +#include <string.h> + +#include "ngtcp2_macro.h" + +void *ngtcp2_cpymem(void *dest, const void *src, size_t n) { + memcpy(dest, src, n); + return (uint8_t *)dest + n; +} + +uint8_t *ngtcp2_setmem(uint8_t *dest, uint8_t b, size_t n) { + memset(dest, b, n); + return dest + n; +} + +const void *ngtcp2_get_bytes(void *dest, const void *src, size_t n) { + memcpy(dest, src, n); + return (uint8_t *)src + n; +} + +#define LOWER_XDIGITS "0123456789abcdef" + +uint8_t *ngtcp2_encode_hex(uint8_t *dest, const uint8_t *data, size_t len) { + size_t i; + uint8_t *p = dest; + + for (i = 0; i < len; ++i) { + *p++ = (uint8_t)LOWER_XDIGITS[data[i] >> 4]; + *p++ = (uint8_t)LOWER_XDIGITS[data[i] & 0xf]; + } + + *p = '\0'; + + return dest; +} + +char *ngtcp2_encode_printable_ascii(char *dest, const uint8_t *data, + size_t len) { + size_t i; + char *p = dest; + uint8_t c; + + for (i = 0; i < len; ++i) { + c = data[i]; + if (0x20 <= c && c <= 0x7e) { + *p++ = (char)c; + } else { + *p++ = '.'; + } + } + + *p = '\0'; + + return dest; +} + +/* + * write_uint writes |n| to the buffer pointed by |p| in decimal + * representation. It returns |p| plus the number of bytes written. + * The function assumes that the buffer has enough capacity to contain + * a string. + */ +static uint8_t *write_uint(uint8_t *p, uint64_t n) { + size_t nlen = 0; + uint64_t t; + uint8_t *res; + + if (n == 0) { + *p++ = '0'; + return p; + } + for (t = n; t; t /= 10, ++nlen) + ; + p += nlen; + res = p; + for (; n; n /= 10) { + *--p = (uint8_t)((n % 10) + '0'); + } + return res; +} + +uint8_t *ngtcp2_encode_ipv4(uint8_t *dest, const uint8_t *addr) { + size_t i; + uint8_t *p = dest; + + p = write_uint(p, addr[0]); + + for (i = 1; i < 4; ++i) { + *p++ = '.'; + p = write_uint(p, addr[i]); + } + + *p = '\0'; + + return dest; +} + +/* + * write_hex_zsup writes the content of buffer pointed by |data| of + * length |len| to |dest| in hex string. Any leading zeros are + * suppressed. It returns |dest| plus the number of bytes written. + */ +static uint8_t *write_hex_zsup(uint8_t *dest, const uint8_t *data, size_t len) { + size_t i; + uint8_t *p = dest; + uint8_t d; + + for (i = 0; i < len; ++i) { + d = data[i]; + if (d >> 4) { + break; + } + + d &= 0xf; + + if (d) { + *p++ = (uint8_t)LOWER_XDIGITS[d]; + ++i; + break; + } + } + + if (p == dest && i == len) { + *p++ = '0'; + return p; + } + + for (; i < len; ++i) { + d = data[i]; + *p++ = (uint8_t)LOWER_XDIGITS[d >> 4]; + *p++ = (uint8_t)LOWER_XDIGITS[d & 0xf]; + } + + return p; +} + +uint8_t *ngtcp2_encode_ipv6(uint8_t *dest, const uint8_t *addr) { + uint16_t blks[8]; + size_t i; + size_t zlen, zoff; + size_t max_zlen = 0, max_zoff = 8; + uint8_t *p = dest; + + for (i = 0; i < 16; i += sizeof(uint16_t)) { + /* Copy in network byte order. */ + memcpy(&blks[i / sizeof(uint16_t)], addr + i, sizeof(uint16_t)); + } + + for (i = 0; i < 8;) { + if (blks[i]) { + ++i; + continue; + } + + zlen = 1; + zoff = i; + + ++i; + for (; i < 8 && blks[i] == 0; ++i, ++zlen) + ; + if (zlen > max_zlen) { + max_zlen = zlen; + max_zoff = zoff; + } + } + + /* Do not suppress a single '0' block */ + if (max_zlen == 1) { + max_zoff = 8; + } + + if (max_zoff != 0) { + p = write_hex_zsup(p, (const uint8_t *)blks, sizeof(uint16_t)); + + for (i = 1; i < max_zoff; ++i) { + *p++ = ':'; + p = write_hex_zsup(p, (const uint8_t *)(blks + i), sizeof(uint16_t)); + } + } + + if (max_zoff != 8) { + *p++ = ':'; + + if (max_zoff + max_zlen == 8) { + *p++ = ':'; + } else { + for (i = max_zoff + max_zlen; i < 8; ++i) { + *p++ = ':'; + p = write_hex_zsup(p, (const uint8_t *)(blks + i), sizeof(uint16_t)); + } + } + } + + *p = '\0'; + + return dest; +} + +int ngtcp2_cmemeq(const uint8_t *a, const uint8_t *b, size_t n) { + size_t i; + int rv = 0; + + for (i = 0; i < n; ++i) { + rv |= a[i] ^ b[i]; + } + + return rv == 0; +} |