+/*
+ * Copyright (c) 2003,2005,2006,2011,2012 Apple, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 1996-1999 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 ISC DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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 <sys/types.h>
-#include <netinet/in.h>
#include <arpa/inet.h>
-#include <stdio.h>
+#include <arpa/nameser.h>
+#include <errno.h>
+#include <netinet/in.h>
#include <stdint.h>
+#include <stdio.h>
#include <string.h>
-#include <errno.h>
#include <sys/socket.h>
+#include <sys/types.h>
#define MAX_V4_ADDR_LEN 16
-#define MAX_V6_ADDR_LEN 64
-static const char *hexchars = "0123456789abcdef";
+const char * inet_ntop6(const struct in6_addr *addr, char *dst, socklen_t size);
+const char * inet_ntop4(const struct in_addr *addr, char *dst, socklen_t size);
const char *
-inet_ntop6(const struct in6_addr *addr, char *dst, socklen_t size)
+inet_ntop(int af, const void *addr, char *buf, socklen_t len)
{
- char hexa[8][5], tmp[MAX_V6_ADDR_LEN];
- int zr[8];
- socklen_t len;
- int32_t i, j, k, skip;
- uint8_t x8, hx8;
- uint16_t x16;
- struct in_addr a4;
-
- if (addr == NULL)
- {
- errno = EAFNOSUPPORT;
- return NULL;
- }
-
- if (dst == NULL)
- {
- errno = ENOSPC;
- return NULL;
- }
-
- memset(tmp, 0, MAX_V6_ADDR_LEN);
-
- /* check for mapped or compat addresses */
- i = IN6_IS_ADDR_V4MAPPED(addr);
- j = IN6_IS_ADDR_V4COMPAT(addr);
- if ((i != 0) || (j != 0))
- {
- a4.s_addr = addr->__u6_addr.__u6_addr32[3];
- sprintf(tmp, "::%s%s", (i != 0) ? "ffff:" : "", inet_ntoa(a4));
- len = strlen(tmp) + 1;
- if (len > size)
- {
- errno = ENOSPC;
- return NULL;
- }
-
- memcpy(dst, tmp, len);
- return dst;
- }
-
- k = 0;
- for (i = 0; i < 16; i += 2)
- {
- j = 0;
- skip = 1;
-
- memset(hexa[k], 0, 5);
-
- x8 = addr->__u6_addr.__u6_addr8[i];
-
- hx8 = x8 >> 4;
- if (hx8 != 0)
- {
- skip = 0;
- hexa[k][j++] = hexchars[hx8];
- }
-
- hx8 = x8 & 0x0f;
- if ((skip == 0) || ((skip == 1) && (hx8 != 0)))
- {
- skip = 0;
- hexa[k][j++] = hexchars[hx8];
- }
-
- x8 = addr->__u6_addr.__u6_addr8[i + 1];
+ if (addr && af == AF_INET6) return inet_ntop6(addr, buf, len);
+ if (addr && af == AF_INET) return inet_ntop4(addr, buf, len);
- hx8 = x8 >> 4;
- if ((skip == 0) || ((skip == 1) && (hx8 != 0)))
- {
- hexa[k][j++] = hexchars[hx8];
- }
-
- hx8 = x8 & 0x0f;
- hexa[k][j++] = hexchars[hx8];
-
- k++;
- }
-
- /* find runs of zeros for :: convention */
- j = 0;
- for (i = 7; i >= 0; i--)
- {
- zr[i] = j;
- x16 = addr->__u6_addr.__u6_addr16[i];
- if (x16 == 0) j++;
- else j = 0;
- zr[i] = j;
- }
+ errno = EAFNOSUPPORT;
+ return NULL;
+}
- /* find longest run of zeros */
- k = -1;
- j = 0;
- for(i = 0; i < 8; i++)
- {
- if (zr[i] > j)
- {
- k = i;
- j = zr[i];
+/* const char *
+ * inet_ntop6(src, dst, size)
+ * convert IPv6 binary address into presentation (printable) format
+ * author:
+ * Paul Vixie, 1996.
+ */
+const char *
+inet_ntop6(const struct in6_addr *addr, char *dst, socklen_t size)
+{
+ const u_char *src = addr->__u6_addr.__u6_addr8;
+ /*
+ * 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;
+ u_int words[NS_IN6ADDRSZ / NS_INT16SZ];
+ int i;
+
+ /*
+ * 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;
+ }
}
}
-
- for(i = 0; i < 8; i++)
- {
- if (i != k) zr[i] = 0;
+ if (cur.base != -1) {
+ if (best.base == -1 || cur.len > best.len)
+ best = cur;
}
-
- len = 0;
- for (i = 0; i < 8; i++)
- {
- if (zr[i] != 0)
- {
- /* check for leading zero */
- if (i == 0) tmp[len++] = ':';
- tmp[len++] = ':';
- i += (zr[i] - 1);
+ 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;
}
- for (j = 0; hexa[i][j] != '\0'; j++) tmp[len++] = hexa[i][j];
- if (i != 7) tmp[len++] = ':';
+ /* 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))) {
+ struct in_addr ipv4_addr;
+ memcpy(&ipv4_addr, src+12, sizeof(ipv4_addr));
+ if (!inet_ntop4(&ipv4_addr, tp, (socklen_t)sizeof(tmp) - (socklen_t)(tp - tmp))) {
+ errno = ENOSPC;
+ return (NULL);
+ }
+ tp += strlen(tp);
+ break;
+ }
+ tp += sprintf(tp, "%x", words[i]);
}
-
- /* trailing NULL */
- len++;
-
- if (len > size)
- {
+ /* 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 ((socklen_t)(tp - tmp) > size) {
errno = ENOSPC;
- return NULL;
+ return (NULL);
}
-
- memcpy(dst, tmp, len);
- return dst;
+ strcpy(dst, tmp);
+ return (dst);
}
const char *
{
char tmp[MAX_V4_ADDR_LEN], *p;
const u_int8_t *ap = (u_int8_t *)&addr->s_addr;
- int i, ql, len;
+ int i;
+ size_t ql, len;
- if (addr == NULL)
- {
+ if (addr == NULL) {
errno = EAFNOSUPPORT;
return NULL;
}
- if (dst == NULL)
- {
+ if (dst == NULL) {
errno = ENOSPC;
return NULL;
}
p = tmp;
- for (i = 0; i < 4; i++, ap++)
- {
+ for (i = 0; i < 4; i++, ap++) {
snprintf(p, 4, "%d", *ap);
ql = strlen(p);
len += ql;
if (i < 3) *p++ = '.';
}
- if (len > size)
- {
+ if (len > size) {
errno = ENOSPC;
return NULL;
}
memcpy(dst, tmp, len);
return dst;
}
-
-const char *
-inet_ntop(int af, const void *addr, char *buf, socklen_t len)
-{
- if (af == AF_INET6) return inet_ntop6(addr, buf, len);
- if (af == AF_INET) return inet_ntop4(addr, buf, len);
-
- errno = EAFNOSUPPORT;
- return NULL;
-}
projects / apple / libc.git / blobdiff