--- /dev/null
+/* Copyright (c) 1996 by Internet Software Consortium.\r
+ *\r
+ * Permission to use, copy, modify, and distribute this software for any\r
+ * purpose with or without fee is hereby granted, provided that the above\r
+ * copyright notice and this permission notice appear in all copies.\r
+ *\r
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS\r
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES\r
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE\r
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r
+ * SOFTWARE.\r
+ */\r
+\r
+/*\r
+ * Portions copyright (c) 1999, 2000\r
+ * Intel Corporation.\r
+ * All rights reserved.\r
+ * \r
+ * Redistribution and use in source and binary forms, with or without\r
+ * modification, are permitted provided that the following conditions\r
+ * are met:\r
+ * \r
+ * 1. Redistributions of source code must retain the above copyright\r
+ * notice, this list of conditions and the following disclaimer.\r
+ * \r
+ * 2. Redistributions in binary form must reproduce the above copyright\r
+ * notice, this list of conditions and the following disclaimer in the\r
+ * documentation and/or other materials provided with the distribution.\r
+ * \r
+ * 3. All advertising materials mentioning features or use of this software\r
+ * must display the following acknowledgement:\r
+ * \r
+ * This product includes software developed by Intel Corporation and\r
+ * its contributors.\r
+ * \r
+ * 4. Neither the name of Intel Corporation or its contributors may be\r
+ * used to endorse or promote products derived from this software\r
+ * without specific prior written permission.\r
+ * \r
+ * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''\r
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
+ * ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE\r
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF\r
+ * THE POSSIBILITY OF SUCH DAMAGE.\r
+ * \r
+ */\r
+\r
+#if defined(LIBC_SCCS) && !defined(lint)\r
+static char rcsid[] = "$Id: inet_pton.c,v 1.1.1.1 2003/11/19 01:51:30 kyu3 Exp $";\r
+#endif /* LIBC_SCCS and not lint */\r
+\r
+#include <sys/param.h>\r
+#include <sys/types.h>\r
+#include <sys/socket.h>\r
+#include <netinet/in.h>\r
+#include <arpa/inet.h>\r
+#include <arpa/nameser.h>\r
+#include <string.h>\r
+#include <errno.h>\r
+\r
+/*\r
+ * WARNING: Don't even consider trying to compile this on a system where\r
+ * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.\r
+ */\r
+\r
+static int inet_pton4 (const char *src, u_char *dst);\r
+static int inet_pton6 (const char *src, u_char *dst);\r
+\r
+/* int\r
+ * inet_pton(af, src, dst)\r
+ * convert from presentation format (which usually means ASCII printable)\r
+ * to network format (which is usually some kind of binary format).\r
+ * return:\r
+ * 1 if the address was valid for the specified address family\r
+ * 0 if the address wasn't valid (`dst' is untouched in this case)\r
+ * -1 if some other error occurred (`dst' is untouched in this case, too)\r
+ * author:\r
+ * Paul Vixie, 1996.\r
+ */\r
+int\r
+inet_pton(\r
+ int af,\r
+ const char *src,\r
+ void *dst\r
+ )\r
+{\r
+ switch (af) {\r
+ case AF_INET:\r
+ return (inet_pton4(src, dst));\r
+ case AF_INET6:\r
+ return (inet_pton6(src, dst));\r
+ default:\r
+ errno = EAFNOSUPPORT;\r
+ return (-1);\r
+ }\r
+ /* NOTREACHED */\r
+}\r
+\r
+/* int\r
+ * inet_pton4(src, dst)\r
+ * like inet_aton() but without all the hexadecimal and shorthand.\r
+ * return:\r
+ * 1 if `src' is a valid dotted quad, else 0.\r
+ * notice:\r
+ * does not touch `dst' unless it's returning 1.\r
+ * author:\r
+ * Paul Vixie, 1996.\r
+ */\r
+static int\r
+inet_pton4(\r
+ const char *src,\r
+ u_char *dst\r
+ )\r
+{\r
+ static const char digits[] = "0123456789";\r
+ int saw_digit, octets, ch;\r
+ u_char tmp[NS_INADDRSZ], *tp;\r
+\r
+ saw_digit = 0;\r
+ octets = 0;\r
+ *(tp = tmp) = 0;\r
+ while ((ch = *src++) != '\0') {\r
+ const char *pch;\r
+\r
+ if ((pch = strchr(digits, ch)) != NULL) {\r
+ u_int new = *tp * 10 + (u_int)(pch - digits);\r
+\r
+ if (new > 255)\r
+ return (0);\r
+ *tp = (u_char)new;\r
+ if (! saw_digit) {\r
+ if (++octets > 4)\r
+ return (0);\r
+ saw_digit = 1;\r
+ }\r
+ } else if (ch == '.' && saw_digit) {\r
+ if (octets == 4)\r
+ return (0);\r
+ *++tp = 0;\r
+ saw_digit = 0;\r
+ } else\r
+ return (0);\r
+ }\r
+ if (octets < 4)\r
+ return (0);\r
+\r
+ memcpy(dst, tmp, NS_INADDRSZ);\r
+ return (1);\r
+}\r
+\r
+/* int\r
+ * inet_pton6(src, dst)\r
+ * convert presentation level address to network order binary form.\r
+ * return:\r
+ * 1 if `src' is a valid [RFC1884 2.2] address, else 0.\r
+ * notice:\r
+ * (1) does not touch `dst' unless it's returning 1.\r
+ * (2) :: in a full address is silently ignored.\r
+ * credit:\r
+ * inspired by Mark Andrews.\r
+ * author:\r
+ * Paul Vixie, 1996.\r
+ */\r
+static int\r
+inet_pton6(\r
+ const char *src,\r
+ u_char *dst\r
+ )\r
+{\r
+ static const char xdigits_l[] = "0123456789abcdef",\r
+ xdigits_u[] = "0123456789ABCDEF";\r
+ u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;\r
+ const char *xdigits, *curtok;\r
+ int ch, saw_xdigit;\r
+ u_int val;\r
+\r
+ memset((tp = tmp), '\0', NS_IN6ADDRSZ);\r
+ endp = tp + NS_IN6ADDRSZ;\r
+ colonp = NULL;\r
+ /* Leading :: requires some special handling. */\r
+ if (*src == ':')\r
+ if (*++src != ':')\r
+ return (0);\r
+ curtok = src;\r
+ saw_xdigit = 0;\r
+ val = 0;\r
+ while ((ch = *src++) != '\0') {\r
+ const char *pch;\r
+\r
+ if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)\r
+ pch = strchr((xdigits = xdigits_u), ch);\r
+ if (pch != NULL) {\r
+ val <<= 4;\r
+ val |= (pch - xdigits);\r
+ if (val > 0xffff)\r
+ return (0);\r
+ saw_xdigit = 1;\r
+ continue;\r
+ }\r
+ if (ch == ':') {\r
+ curtok = src;\r
+ if (!saw_xdigit) {\r
+ if (colonp)\r
+ return (0);\r
+ colonp = tp;\r
+ continue;\r
+ }\r
+ if (tp + NS_INT16SZ > endp)\r
+ return (0);\r
+ *tp++ = (u_char) (val >> 8) & 0xff;\r
+ *tp++ = (u_char) val & 0xff;\r
+ saw_xdigit = 0;\r
+ val = 0;\r
+ continue;\r
+ }\r
+ if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&\r
+ inet_pton4(curtok, tp) > 0) {\r
+ tp += NS_INADDRSZ;\r
+ saw_xdigit = 0;\r
+ break; /* '\0' was seen by inet_pton4(). */\r
+ }\r
+ return (0);\r
+ }\r
+ if (saw_xdigit) {\r
+ if (tp + NS_INT16SZ > endp)\r
+ return (0);\r
+ *tp++ = (u_char) (val >> 8) & 0xff;\r
+ *tp++ = (u_char) val & 0xff;\r
+ }\r
+ if (colonp != NULL) {\r
+ /*\r
+ * Since some memmove()'s erroneously fail to handle\r
+ * overlapping regions, we'll do the shift by hand.\r
+ */\r
+ const int n = (int)(tp - colonp);\r
+ int i;\r
+\r
+ for (i = 1; i <= n; i++) {\r
+ endp[- i] = colonp[n - i];\r
+ colonp[n - i] = 0;\r
+ }\r
+ tp = endp;\r
+ }\r
+ if (tp != endp)\r
+ return (0);\r
+ memcpy(dst, tmp, NS_IN6ADDRSZ);\r
+ return (1);\r
+}\r
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