diff options
Diffstat (limited to 'replace/inet_ntop.c')
| -rw-r--r-- | replace/inet_ntop.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/replace/inet_ntop.c b/replace/inet_ntop.c deleted file mode 100644 index fb3d8e90..00000000 --- a/replace/inet_ntop.c +++ /dev/null @@ -1,191 +0,0 @@ -/* - * Copyright (C) 1996-2001 Internet Software Consortium. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM - * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL - * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, - * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING - * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, - * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION - * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - - -#include "replace.h" -#include "system/network.h" - -#define NS_INT16SZ 2 -#define NS_IN6ADDRSZ 16 - -/* - * WARNING: Don't even consider trying to compile this on a system where - * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX. - */ - -static const char *inet_ntop4(const unsigned char *src, char *dst, - socklen_t size); - -#ifdef AF_INET6 -static const char *inet_ntop6(const unsigned char *src, char *dst, - socklen_t size); -#endif - -/* char * - * isc_net_ntop(af, src, dst, size) - * convert a network format address to presentation format. - * return: - * pointer to presentation format address (`dst'), or NULL (see errno). - * author: - * Paul Vixie, 1996. - */ -const char * -rep_inet_ntop(int af, const void *src, char *dst, socklen_t size) -{ - switch (af) { - case AF_INET: - return (inet_ntop4(src, dst, size)); -#ifdef AF_INET6 - case AF_INET6: - return (inet_ntop6(src, dst, size)); -#endif - default: - errno = EAFNOSUPPORT; - return (NULL); - } - /* NOTREACHED */ -} - -/* const char * - * inet_ntop4(src, dst, size) - * format an IPv4 address - * return: - * `dst' (as a const) - * notes: - * (1) uses no statics - * (2) takes a unsigned char* not an in_addr as input - * author: - * Paul Vixie, 1996. - */ -static const char * -inet_ntop4(const unsigned char *src, char *dst, socklen_t size) -{ - static const char *fmt = "%u.%u.%u.%u"; - char tmp[sizeof "255.255.255.255"]; - size_t len; - - len = snprintf(tmp, sizeof tmp, fmt, src[0], src[1], src[2], src[3]); - if (len >= size) { - errno = ENOSPC; - return (NULL); - } - memcpy(dst, tmp, len + 1); - - return (dst); -} - -/* const char * - * isc_inet_ntop6(src, dst, size) - * convert IPv6 binary address into presentation (printable) format - * author: - * Paul Vixie, 1996. - */ -#ifdef AF_INET6 -static const char * -inet_ntop6(const unsigned char *src, char *dst, socklen_t size) -{ - /* - * Note that int32_t and int16_t need only be "at least" large enough - * to contain a value of the specified size. On some systems, like - * Crays, there is no such thing as an integer variable with 16 bits. - * Keep this in mind if you think this function should have been coded - * to use pointer overlays. All the world's not a VAX. - */ - char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp; - struct { int base, len; } best, cur; - unsigned int words[NS_IN6ADDRSZ / NS_INT16SZ]; - int i, inc; - - /* - * Preprocess: - * Copy the input (bytewise) array into a wordwise array. - * Find the longest run of 0x00's in src[] for :: shorthanding. - */ - memset(words, '\0', sizeof words); - for (i = 0; i < NS_IN6ADDRSZ; i++) - words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3)); - best.base = -1; - best.len = 0; - cur.base = -1; - cur.len = 0; - for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) { - if (words[i] == 0) { - if (cur.base == -1) - cur.base = i, cur.len = 1; - else - cur.len++; - } else { - if (cur.base != -1) { - if (best.base == -1 || cur.len > best.len) - best = cur; - cur.base = -1; - } - } - } - if (cur.base != -1) { - if (best.base == -1 || cur.len > best.len) - best = cur; - } - if (best.base != -1 && best.len < 2) - best.base = -1; - - /* - * Format the result. - */ - tp = tmp; - for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) { - /* Are we inside the best run of 0x00's? */ - if (best.base != -1 && i >= best.base && - i < (best.base + best.len)) { - if (i == best.base) - *tp++ = ':'; - continue; - } - /* Are we following an initial run of 0x00s or any real hex? */ - if (i != 0) - *tp++ = ':'; - /* Is this address an encapsulated IPv4? */ - if (i == 6 && best.base == 0 && - (best.len == 6 || (best.len == 5 && words[5] == 0xffff))) { - if (!inet_ntop4(src+12, tp, sizeof tmp - (tp - tmp))) - return (NULL); - tp += strlen(tp); - break; - } - inc = snprintf(tp, 5, "%x", words[i]); - if (inc >= 5) { - abort(); - } - tp += inc; - } - /* Was it a trailing run of 0x00's? */ - if (best.base != -1 && (best.base + best.len) == - (NS_IN6ADDRSZ / NS_INT16SZ)) - *tp++ = ':'; - *tp++ = '\0'; - - /* - * Check for overflow, copy, and we're done. - */ - if ((size_t)(tp - tmp) > size) { - errno = ENOSPC; - return (NULL); - } - memcpy(dst, tmp, tp - tmp); - return (dst); -} -#endif /* AF_INET6 */ |