summaryrefslogtreecommitdiff
path: root/contrib/bind/lib/inet/inet_cidr_ntop.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/bind/lib/inet/inet_cidr_ntop.c')
-rw-r--r--contrib/bind/lib/inet/inet_cidr_ntop.c259
1 files changed, 0 insertions, 259 deletions
diff --git a/contrib/bind/lib/inet/inet_cidr_ntop.c b/contrib/bind/lib/inet/inet_cidr_ntop.c
deleted file mode 100644
index 0acff763cdde..000000000000
--- a/contrib/bind/lib/inet/inet_cidr_ntop.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
- * Copyright (c) 1998,1999 by 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.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id: inet_cidr_ntop.c,v 8.7 2001/09/28 05:19:36 marka Exp $";
-#endif
-
-#include "port_before.h"
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/nameser.h>
-#include <arpa/inet.h>
-
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-
-#include "port_after.h"
-
-#ifdef SPRINTF_CHAR
-# define SPRINTF(x) strlen(sprintf/**/x)
-#else
-# define SPRINTF(x) ((size_t)sprintf x)
-#endif
-
-static char * inet_cidr_ntop_ipv4 __P((const u_char *src, int bits,
- char *dst, size_t size));
-static char * inet_cidr_ntop_ipv6 __P((const u_char *src, int bits,
- char *dst, size_t size));
-
-/*
- * char *
- * inet_cidr_ntop(af, src, bits, dst, size)
- * convert network address from network to presentation format.
- * "src"'s size is determined from its "af".
- * return:
- * pointer to dst, or NULL if an error occurred (check errno).
- * note:
- * 192.5.5.1/28 has a nonzero host part, which means it isn't a network
- * as called for by inet_net_ntop() but it can be a host address with
- * an included netmask.
- * author:
- * Paul Vixie (ISC), October 1998
- */
-char *
-inet_cidr_ntop(int af, const void *src, int bits, char *dst, size_t size) {
- switch (af) {
- case AF_INET:
- return (inet_cidr_ntop_ipv4(src, bits, dst, size));
- case AF_INET6:
- return (inet_cidr_ntop_ipv6(src, bits, dst, size));
- default:
- errno = EAFNOSUPPORT;
- return (NULL);
- }
-}
-
-static int
-decoct(const u_char *src, int bytes, char *dst, size_t size) {
- char *odst = dst;
- char *t;
- int b;
-
- for (b = 1; b <= bytes; b++) {
- if (size < sizeof "255.")
- return (0);
- t = dst;
- dst += SPRINTF((dst, "%u", *src++));
- if (b != bytes) {
- *dst++ = '.';
- *dst = '\0';
- }
- size -= (size_t)(dst - t);
- }
- return (dst - odst);
-}
-
-/*
- * static char *
- * inet_cidr_ntop_ipv4(src, bits, dst, size)
- * convert IPv4 network address from network to presentation format.
- * "src"'s size is determined from its "af".
- * return:
- * pointer to dst, or NULL if an error occurred (check errno).
- * note:
- * network byte order assumed. this means 192.5.5.240/28 has
- * 0b11110000 in its fourth octet.
- * author:
- * Paul Vixie (ISC), October 1998
- */
-static char *
-inet_cidr_ntop_ipv4(const u_char *src, int bits, char *dst, size_t size) {
- char *odst = dst;
- size_t len = 4;
- size_t b;
- size_t bytes;
-
- if ((bits < -1) || (bits > 32)) {
- errno = EINVAL;
- return (NULL);
- }
-
- /* Find number of significant bytes in address. */
- if (bits == -1)
- len = 4;
- else
- for (len = 1, b = 1 ; b < 4; b++)
- if (*(src + b))
- len = b + 1;
-
- /* Format whole octets plus nonzero trailing octets. */
- bytes = (((bits <= 0) ? 1 : bits) + 7) / 8;
- if (len > bytes)
- bytes = len;
- b = decoct(src, bytes, dst, size);
- if (b == 0)
- goto emsgsize;
- dst += b;
- size -= b;
-
- if (bits != -1) {
- /* Format CIDR /width. */
- if (size < sizeof "/32")
- goto emsgsize;
- dst += SPRINTF((dst, "/%u", bits));
- }
-
- return (odst);
-
- emsgsize:
- errno = EMSGSIZE;
- return (NULL);
-}
-
-static char *
-inet_cidr_ntop_ipv6(const u_char *src, int bits, char *dst, size_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:255.255.255.255/128"];
- char *tp;
- struct { int base, len; } best, cur;
- u_int words[NS_IN6ADDRSZ / NS_INT16SZ];
- int i;
-
- if ((bits < -1) || (bits > 128)) {
- errno = EINVAL;
- return (NULL);
- }
-
- /*
- * 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;
- cur.base = -1;
- 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 == 7 && words[7] != 0x0001) ||
- (best.len == 5 && words[5] == 0xffff))) {
- int n;
-
- if (src[15] || bits == -1 || bits > 120)
- n = 4;
- else if (src[14] || bits > 112)
- n = 3;
- else
- n = 2;
- n = decoct(src+12, n, tp, sizeof tmp - (tp - tmp));
- if (n == 0) {
- errno = EMSGSIZE;
- return (NULL);
- }
- tp += strlen(tp);
- break;
- }
- tp += SPRINTF((tp, "%x", words[i]));
- }
-
- /* Was it a trailing run of 0x00's? */
- if (best.base != -1 && (best.base + best.len) ==
- (NS_IN6ADDRSZ / NS_INT16SZ))
- *tp++ = ':';
- *tp = '\0';
-
- if (bits != -1)
- tp += SPRINTF((tp, "/%u", bits));
-
- /*
- * Check for overflow, copy, and we're done.
- */
- if ((size_t)(tp - tmp) > size) {
- errno = EMSGSIZE;
- return (NULL);
- }
- strcpy(dst, tmp);
- return (dst);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-27 12:56:35 +0000