diff options
Diffstat (limited to 'third_party/heimdal/lib/roken/inet_ntop.c')
| -rw-r--r-- | third_party/heimdal/lib/roken/inet_ntop.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/roken/inet_ntop.c b/third_party/heimdal/lib/roken/inet_ntop.c new file mode 100644 index 0000000..b3c327c --- /dev/null +++ b/third_party/heimdal/lib/roken/inet_ntop.c @@ -0,0 +1,151 @@ +/* + * Copyright (c) 1999 - 2001 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <config.h> + +#include "roken.h" + +/* + * + */ + +static const char * +inet_ntop_v4 (const void *src, char *dst, size_t size) +{ + const char digits[] = "0123456789"; + int i; + struct in_addr *addr = (struct in_addr *)src; + u_long a = ntohl(addr->s_addr); + const char *orig_dst = dst; + + if (size < INET_ADDRSTRLEN) { + errno = ENOSPC; + return NULL; + } + for (i = 0; i < 4; ++i) { + int n = (a >> (24 - i * 8)) & 0xFF; + int non_zerop = 0; + + if (non_zerop || n / 100 > 0) { + *dst++ = digits[n / 100]; + n %= 100; + non_zerop = 1; + } + if (non_zerop || n / 10 > 0) { + *dst++ = digits[n / 10]; + n %= 10; + non_zerop = 1; + } + *dst++ = digits[n]; + if (i != 3) + *dst++ = '.'; + } + *dst++ = '\0'; + return orig_dst; +} + +#ifdef HAVE_IPV6 +static const char * +inet_ntop_v6 (const void *src, char *dst, size_t size) +{ + const char xdigits[] = "0123456789abcdef"; + int i; + const struct in6_addr *addr = (struct in6_addr *)src; + const u_char *ptr = addr->s6_addr; + const char *orig_dst = dst; + int compressed = 0; + + if (size < INET6_ADDRSTRLEN) { + errno = ENOSPC; + return NULL; + } + for (i = 0; i < 8; ++i) { + int non_zerop = 0; + + if (compressed == 0 && + ptr[0] == 0 && ptr[1] == 0 && + i <= 5 && + ptr[2] == 0 && ptr[3] == 0 && + ptr[4] == 0 && ptr[5] == 0) { + + compressed = 1; + + if (i == 0) + *dst++ = ':'; + *dst++ = ':'; + + for (ptr += 6, i += 3; + i < 8 && ptr[0] == 0 && ptr[1] == 0; + ++i, ptr += 2); + + if (i >= 8) + break; + } + + if (non_zerop || (ptr[0] >> 4)) { + *dst++ = xdigits[ptr[0] >> 4]; + non_zerop = 1; + } + if (non_zerop || (ptr[0] & 0x0F)) { + *dst++ = xdigits[ptr[0] & 0x0F]; + non_zerop = 1; + } + if (non_zerop || (ptr[1] >> 4)) { + *dst++ = xdigits[ptr[1] >> 4]; + non_zerop = 1; + } + *dst++ = xdigits[ptr[1] & 0x0F]; + if (i != 7) + *dst++ = ':'; + ptr += 2; + } + *dst++ = '\0'; + return orig_dst; +} +#endif /* HAVE_IPV6 */ + +ROKEN_LIB_FUNCTION const char * ROKEN_LIB_CALL +inet_ntop(int af, const void *src, char *dst, size_t size) +{ + switch (af) { + case AF_INET : + return inet_ntop_v4 (src, dst, size); +#ifdef HAVE_IPV6 + case AF_INET6 : + return inet_ntop_v6 (src, dst, size); +#endif + default : + errno = EAFNOSUPPORT; + return NULL; + } +} |