Some OS do not provide RFC 3495 libraries (socket extensions for IPv6).
While these OS are expected to be built with --disable-ipv6 they still need
squid to provide the library methods for IP-neutral code use of IPv4.
TODO: This patch does not contain the autotools configure options to cause
these functions to be built. That will come in the later IPv6-enabling patch
--- /dev/null
+#ifndef _getaddrinfo_h
+#define _getaddrinfo_h
+
+/*
+ * Shamelessly duplicated from the fetchmail public sources
+ * for use by the Squid Project under GNU Public License.
+ *
+ * Update/Maintenance History:
+ *
+ * 15-Aug-2007 : Copied from fetchmail 6.3.8
+ * - added protection around libray headers
+ *
+ * 16-Aug-2007 : Altered configure checks
+ * Un-hacked slightly to use system gethostbyname()
+ *
+ * Squid CVS $Id: getaddrinfo.h,v 1.1 2007/12/14 05:03:25 amosjeffries Exp $
+ *
+ * Original License and code follows.
+ */
+
+#include "config.h"
+
+/*
+ * This file is part of libESMTP, a library for submission of RFC 2822
+ * formatted electronic mail messages using the SMTP protocol described
+ * in RFC 2821.
+ *
+ * Copyright (C) 2001,2002 Brian Stafford <brian@stafford.uklinux.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* Structure and prototypes taken from RFC 2553 */
+
+#ifdef HAVE_GETADDRINFO
+
+ /* These functions are provided by the OS */
+#define xgetaddrinfo getaddrinfo
+#define xfreeaddrinfo freeaddrinfo
+#define xgai_strerror gai_strerror
+
+#else /* !HAVE_GETADDRINFO */
+
+/* SG 23/09/2007:
+ On Windows the following definitions are already available, may be that
+ this could be needed on some other platform */
+#if 0
+struct addrinfo
+ {
+ int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */
+ int ai_family; /* PF_xxx */
+ int ai_socktype; /* SOCK_xxx */
+ int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
+ size_t ai_addrlen; /* length of ai_addr */
+ char *ai_canonname; /* canonical name for nodename */
+ struct sockaddr *ai_addr; /* binary address */
+ struct addrinfo *ai_next; /* next structure in linked list */
+ };
+
+/* Supposed to be defined in <netdb.h> */
+#define AI_PASSIVE 1 /* Socket address is intended for `bind'. */
+#define AI_CANONNAME 2 /* Request for canonical name. */
+#define AI_NUMERICHOST 4 /* Don't use name resolution. */
+
+/* Supposed to be defined in <netdb.h> */
+#define EAI_ADDRFAMILY 1 /* address family for nodename not supported */
+#define EAI_AGAIN 2 /* temporary failure in name resolution */
+#define EAI_BADFLAGS 3 /* invalid value for ai_flags */
+#define EAI_FAIL 4 /* non-recoverable failure in name resolution */
+#define EAI_FAMILY 5 /* ai_family not supported */
+#define EAI_MEMORY 6 /* memory allocation failure */
+#define EAI_NODATA 7 /* no address associated with nodename */
+#define EAI_NONAME 8 /* nodename nor servname provided, or not known */
+#define EAI_SERVICE 9 /* servname not supported for ai_socktype */
+#define EAI_SOCKTYPE 10 /* ai_socktype not supported */
+#endif
+#ifndef EAI_SYSTEM
+/* Not defined on mingw32. */
+#define EAI_SYSTEM 11 /* System error returned in `errno'. */
+#endif
+#ifndef EAI_OVERFLOW
+/* Not defined on mingw32. */
+#define EAI_OVERFLOW 12 /* Argument buffer overflow. */
+#endif
+
+#ifndef IN_EXPERIMENTAL
+#define IN_EXPERIMENTAL(a) \
+ ((((long int) (a)) & 0xf0000000) == 0xf0000000)
+#endif
+
+/* RFC 2553 / Posix resolver */
+SQUIDCEXTERN int xgetaddrinfo (const char *nodename, const char *servname,
+ const struct addrinfo *hints, struct addrinfo **res);
+
+/* Free addrinfo structure and associated storage */
+SQUIDCEXTERN void xfreeaddrinfo (struct addrinfo *ai);
+
+/* Convert error return from getaddrinfo() to string */
+SQUIDCEXTERN const char *xgai_strerror (int code);
+
+#endif /* HAVE_GETADDRINFO */
+
+#endif
--- /dev/null
+#ifndef _getnameinfo_h
+#define _getnameinfo_h
+/*
+ * Reconstructed from KAME getnameinfo.c (in lib/)
+ *
+ * $Id: getnameinfo.h,v 1.1 2007/12/14 05:03:25 amosjeffries Exp $
+ */
+
+#include "config.h"
+
+#ifdef HAVE_GETNAMEINFO
+
+ /* These functions are provided by the OS */
+#define xgetnameinfo getnameinfo
+
+#else /* !HAVE_GETNAMEINFO */
+
+/* RFC 2553 / Posix resolver */
+SQUIDCEXTERN int xgetnameinfo(const struct sockaddr *sa,
+ socklen_t salen,
+ char *host,
+ size_t hostlen,
+ char *serv,
+ size_t servlen,
+ int flags );
+
+
+#endif /* HAVE_GETNAMEINFO */
+
+#endif
--- /dev/null
+#ifndef _INC_INET_NTOP_H
+#define _INC_INET_NTOP_H
+
+#if HAVE_INET_NTOP
+
+/* Use the system provided version where possible */
+#define xinet_ntop inet_ntop
+
+#else
+
+/* char *
+ * inet_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.
+ */
+SQUIDCEXTERN const char * xinet_ntop(int af, const void *src, char *dst, size_t size);
+
+#endif
+
+#endif /* _INC_INET_NTOP_H */
--- /dev/null
+#ifndef _INC_INET_PTON_H
+#define _INC_INET_PTON_H
+
+#if HAVE_INET_PTON
+
+/* Use the system provided version where possible */
+#define xinet_pton inet_pton
+
+#else
+
+/* int
+ * inet_pton(af, src, dst)
+ * convert from presentation format (which usually means ASCII printable)
+ * to network format (which is usually some kind of binary format).
+ * return:
+ * 1 if the address was valid for the specified address family
+ * 0 if the address wasn't valid (`dst' is untouched in this case)
+ * -1 if some other error occurred (`dst' is untouched in this case, too)
+ * author:
+ * Paul Vixie, 1996.
+ */
+SQUIDCEXTERN int xinet_pton(int af, const char *src, void *dst);
+
+#endif
+
+#endif /* _INC_INET_NTOP_H */
--- /dev/null
+/*
+ * Shamelessly duplicated from the fetchmail public sources
+ * for use by the Squid Project under GNU Public License.
+ *
+ * Update/Maintenance History:
+ *
+ * 15-Aug-2007 : Copied from fetchmail 6.3.8
+ * - added protection around libray headers
+ *
+ * 16-Aug-2007 : Altered configure checks
+ * Un-hacked slightly to use system gethostbyname()
+ *
+ * 06-Oct-2007 : Various fixes to allow the build on MinGW
+ *
+ * Squid CVS $Id: getaddrinfo.c,v 1.1 2007/12/14 05:03:26 amosjeffries Exp $
+ *
+ * Original License and code follows.
+ */
+#include "config.h"
+
+/*
+ * This file is part of libESMTP, a library for submission of RFC 2822
+ * formatted electronic mail messages using the SMTP protocol described
+ * in RFC 2821.
+ *
+ * Copyright (C) 2001,2002 Brian Stafford <brian@stafford.uklinux.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* An emulation of the RFC 2553 / Posix getaddrinfo resolver interface.
+ */
+
+#ifndef HAVE_GETADDRINFO
+
+/* Need to turn off Posix features in glibc to build this */
+#undef _POSIX_C_SOURCE
+#undef _XOPEN_SOURCE
+
+#if HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+#if HAVE_CTYPE_H
+#include <ctype.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#if HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#if HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#if HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#if HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef _SQUID_MSWIN_
+#undef IN_ADDR
+#include <ws2tcpip.h>
+#endif
+
+#include "getaddrinfo.h"
+
+static struct addrinfo *
+dup_addrinfo (struct addrinfo *info, void *addr, size_t addrlen)
+{
+ struct addrinfo *ret;
+
+ ret = malloc (sizeof (struct addrinfo));
+ if (ret == NULL)
+ return NULL;
+ memcpy (ret, info, sizeof (struct addrinfo));
+ ret->ai_addr = malloc (addrlen);
+ if (ret->ai_addr == NULL)
+ {
+ free (ret);
+ return NULL;
+ }
+ memcpy (ret->ai_addr, addr, addrlen);
+ ret->ai_addrlen = addrlen;
+ return ret;
+}
+
+int
+xgetaddrinfo (const char *nodename, const char *servname,
+ const struct addrinfo *hints, struct addrinfo **res)
+{
+ struct hostent *hp;
+ struct servent *servent;
+ const char *socktype;
+ int port;
+ struct addrinfo hint, result;
+ struct addrinfo *ai, *sai, *eai;
+ char **addrs;
+
+ if (servname == NULL && nodename == NULL)
+ return EAI_NONAME;
+
+ memset (&result, 0, sizeof result);
+
+ /* default for hints */
+ if (hints == NULL)
+ {
+ memset (&hint, 0, sizeof hint);
+ hint.ai_family = PF_UNSPEC;
+ hints = &hint;
+ }
+
+ if (servname == NULL)
+ port = 0;
+ else {
+ /* check for tcp or udp sockets only */
+ if (hints->ai_socktype == SOCK_STREAM)
+ socktype = "tcp";
+ else if (hints->ai_socktype == SOCK_DGRAM)
+ socktype = "udp";
+ else
+ return EAI_SERVICE;
+ result.ai_socktype = hints->ai_socktype;
+
+ /* Note: maintain port in host byte order to make debugging easier */
+ if (isdigit (*servname))
+ port = strtol (servname, NULL, 10);
+ else if ((servent = getservbyname (servname, socktype)) != NULL)
+ port = ntohs (servent->s_port);
+ else
+ return EAI_NONAME;
+ }
+
+ /* if nodename == NULL refer to the local host for a client or any
+ for a server */
+ if (nodename == NULL)
+ {
+ struct sockaddr_in sin;
+
+ /* check protocol family is PF_UNSPEC or PF_INET - could try harder
+ for IPv6 but that's more code than I'm prepared to write */
+ if (hints->ai_family == PF_UNSPEC || hints->ai_family == PF_INET)
+ result.ai_family = AF_INET;
+ else
+ return EAI_FAMILY;
+
+ sin.sin_family = result.ai_family;
+ sin.sin_port = htons (port);
+ if (hints->ai_flags & AI_PASSIVE)
+ sin.sin_addr.s_addr = htonl (INADDR_ANY);
+ else
+ sin.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+ /* Duplicate result and addr and return */
+ *res = dup_addrinfo (&result, &sin, sizeof sin);
+ return (*res == NULL) ? EAI_MEMORY : 0;
+ }
+
+ /* If AI_NUMERIC is specified, use inet_addr to translate numbers and
+ dots notation. */
+ if (hints->ai_flags & AI_NUMERICHOST)
+ {
+ struct sockaddr_in sin;
+
+ /* check protocol family is PF_UNSPEC or PF_INET */
+ if (hints->ai_family == PF_UNSPEC || hints->ai_family == PF_INET)
+ result.ai_family = AF_INET;
+ else
+ return EAI_FAMILY;
+
+ sin.sin_family = result.ai_family;
+ sin.sin_port = htons (port);
+ sin.sin_addr.s_addr = inet_addr (nodename);
+ /* Duplicate result and addr and return */
+ *res = dup_addrinfo (&result, &sin, sizeof sin);
+ return (*res == NULL) ? EAI_MEMORY : 0;
+ }
+
+ h_errno = 0;
+ errno = 0;
+ hp = gethostbyname(nodename);
+ if (hp == NULL)
+ {
+#ifdef EAI_SYSTEM
+ if (errno != 0) {
+ return EAI_SYSTEM;
+ }
+#endif
+ switch (h_errno)
+ {
+ case HOST_NOT_FOUND: return EAI_NODATA;
+ case NO_DATA: return EAI_NODATA;
+#if defined(NO_ADDRESS) && NO_ADDRESS != NO_DATA
+ case NO_ADDRESS: return EAI_NODATA;
+#endif
+ case NO_RECOVERY: return EAI_FAIL;
+ case TRY_AGAIN: return EAI_AGAIN;
+ default: return EAI_FAIL;
+ }
+ return EAI_FAIL;
+ }
+
+ /* Check that the address family is acceptable.
+ */
+ switch (hp->h_addrtype)
+ {
+ case AF_INET:
+ if (!(hints->ai_family == PF_UNSPEC || hints->ai_family == PF_INET))
+ return EAI_FAMILY;
+ break;
+#if USE_IPV6
+ case AF_INET6:
+ if (!(hints->ai_family == PF_UNSPEC || hints->ai_family == PF_INET6))
+ return EAI_FAMILY;
+ break;
+#endif
+ default:
+ return EAI_FAMILY;
+ }
+
+ /* For each element pointed to by hp, create an element in the
+ result linked list. */
+ sai = eai = NULL;
+ for (addrs = hp->h_addr_list; *addrs != NULL; addrs++)
+ {
+ struct sockaddr sa;
+ size_t addrlen;
+
+ if (hp->h_length < 1)
+ continue;
+ sa.sa_family = hp->h_addrtype;
+ switch (hp->h_addrtype)
+ {
+ case AF_INET:
+ ((struct sockaddr_in *) &sa)->sin_port = htons (port);
+ memcpy (&((struct sockaddr_in *) &sa)->sin_addr,
+ *addrs, hp->h_length);
+ addrlen = sizeof (struct sockaddr_in);
+ break;
+#if USE_IPV6
+ case AF_INET6:
+#if SIN6_LEN
+ ((struct sockaddr_in6 *) &sa)->sin6_len = hp->h_length;
+#endif
+ ((struct sockaddr_in6 *) &sa)->sin6_port = htons (port);
+ memcpy (&((struct sockaddr_in6 *) &sa)->sin6_addr,
+ *addrs, hp->h_length);
+ addrlen = sizeof (struct sockaddr_in6);
+ break;
+#endif
+ default:
+ continue;
+ }
+
+ result.ai_family = hp->h_addrtype;
+ ai = dup_addrinfo (&result, &sa, addrlen);
+ if (ai == NULL)
+ {
+ xfreeaddrinfo (sai);
+ return EAI_MEMORY;
+ }
+ if (sai == NULL)
+ sai = ai;
+ else
+ eai->ai_next = ai;
+ eai = ai;
+ }
+
+ if (sai == NULL)
+ {
+ return EAI_NODATA;
+ }
+
+ if (hints->ai_flags & AI_CANONNAME)
+ {
+ sai->ai_canonname = malloc (strlen (hp->h_name) + 1);
+ if (sai->ai_canonname == NULL)
+ {
+ xfreeaddrinfo (sai);
+ return EAI_MEMORY;
+ }
+ strcpy (sai->ai_canonname, hp->h_name);
+ }
+
+ *res = sai;
+ return 0;
+}
+
+void
+xfreeaddrinfo (struct addrinfo *ai)
+{
+ struct addrinfo *next;
+
+ while (ai != NULL)
+ {
+ next = ai->ai_next;
+ if (ai->ai_canonname != NULL)
+ free (ai->ai_canonname);
+ if (ai->ai_addr != NULL)
+ free (ai->ai_addr);
+ free (ai);
+ ai = next;
+ }
+}
+
+const char *
+xgai_strerror (int ecode)
+{
+ static const char *eai_descr[] =
+ {
+ "no error",
+ "address family for nodename not supported", /* EAI_ADDRFAMILY */
+ "temporary failure in name resolution", /* EAI_AGAIN */
+ "invalid value for ai_flags", /* EAI_BADFLAGS */
+ "non-recoverable failure in name resolution", /* EAI_FAIL */
+ "ai_family not supported", /* EAI_FAMILY */
+ "memory allocation failure", /* EAI_MEMORY */
+ "no address associated with nodename", /* EAI_NODATA */
+ "nodename nor servname provided, or not known", /* EAI_NONAME */
+ "servname not supported for ai_socktype", /* EAI_SERVICE */
+ "ai_socktype not supported", /* EAI_SOCKTYPE */
+ "system error returned in errno", /* EAI_SYSTEM */
+ "argument buffer overflow", /* EAI_OVERFLOW */
+ };
+
+ if (ecode < 0 || ecode > (int) (sizeof eai_descr/ sizeof eai_descr[0]))
+ return "unknown error";
+ return eai_descr[ecode];
+}
+
+#endif /* HAVE_GETADDRINFO */
--- /dev/null
+/*
+ * Shamelessly duplicated from the fetchmail public sources
+ * for use by the Squid Project under GNU Public License.
+ *
+ * Update/Maintenance History:
+ *
+ * 16-Aug-2007 : Copied from fetchmail 6.3.8
+ * - added protection around libray headers
+ * - added use of alternative name xgetnameinfo
+ * to split from any OS-provided.
+ *
+ * 06-Oct-2007 : Various fixes to allow the build on MinGW
+ * - use srtncpy instead of strlcpy
+ * - use xinet_ntop instead of inet_ntop
+ * - use SQUIDHOSTNAMELEN instead of MAXHOSTNAMELEN
+ *
+ * Squid CVS $Id: getnameinfo.c,v 1.1 2007/12/14 05:03:26 amosjeffries Exp $
+ *
+ * Original License and code follows.
+ */
+#include "config.h"
+
+/* KAME: getnameinfo.c,v 1.72 2005/01/13 04:12:03 itojun Exp */
+
+/*
+ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+ * 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 project 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 PROJECT 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 PROJECT 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.
+ */
+
+/*
+ * Issues to be discussed:
+ * - RFC2553 says that we should raise error on short buffer. X/Open says
+ * we need to truncate the result. We obey RFC2553 (and X/Open should be
+ * modified). ipngwg rough consensus seems to follow RFC2553. RFC3493 says
+ * nothing about it, but defines a new error code EAI_OVERFLOW which seems
+ * to be intended the code for this case.
+ * - What is "local" in NI_NOFQDN? (see comments in the code)
+ * - NI_NAMEREQD and NI_NUMERICHOST conflict with each other.
+ * - (KAME extension) always attach textual scopeid (fe80::1%lo0), if
+ * sin6_scope_id is filled - standardization status?
+ * - what should we do if we should do getservbyport("sctp")?
+ */
+
+/*
+ * Considerations about thread-safeness
+ * The code in this file is thread-safe, and so the thread-safeness of
+ * getnameinfo() depends on the property of backend functions.
+ * - getservbyport() is not thread safe for most systems we are targeting.
+ * - getipnodebyaddr() is thread safe. However, many resolver libraries
+ * used in the function are not thread safe.
+ * - gethostbyaddr() is usually not thread safe.
+ */
+
+#ifndef HAVE_GETNAMEINFO
+
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif
+#if HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#if HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+#if HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#if HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#if HAVE_ARPA_NAMESER_H
+#include <arpa/nameser.h>
+#endif
+#if HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#if HAVE_RESOLV_H
+#include <resolv.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+#if HAVE_STDDEF_H
+#include <stddef.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#if HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
+
+#ifdef _SQUID_MSWIN_
+#undef IN_ADDR
+#include <ws2tcpip.h>
+#endif
+
+#include "getaddrinfo.h"
+
+#if !HAVE_INET_NTOP
+#include "inet_ntop.h"
+#endif
+
+static const struct afd {
+ int a_af;
+ int a_addrlen;
+ int a_socklen;
+ int a_off;
+ int a_portoff;
+} afdl [] = {
+#ifdef INET6
+ {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6),
+ offsetof(struct sockaddr_in6, sin6_addr),
+ offsetof(struct sockaddr_in6, sin6_port)},
+#endif
+ {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in),
+ offsetof(struct sockaddr_in, sin_addr),
+ offsetof(struct sockaddr_in, sin_port)},
+ {0, 0, 0, 0, 0},
+};
+
+#ifdef INET6
+static int ip6_parsenumeric __P((const struct sockaddr *, const char *, char *,
+ size_t, int));
+static int ip6_sa2str __P((const struct sockaddr_in6 *, char *, size_t, int));
+#endif
+
+int
+xgetnameinfo(sa, salen, host, hostlen, serv, servlen, flags)
+ const struct sockaddr *sa;
+ socklen_t salen;
+ char *host;
+ size_t hostlen;
+ char *serv;
+ size_t servlen;
+ int flags;
+{
+ const struct afd *afd;
+ struct servent *sp;
+ struct hostent *hp;
+ u_short port;
+ int family, i;
+ const char *addr;
+ u_int32_t v4a;
+ int h_error;
+ char numserv[512];
+
+ if (sa == NULL)
+ return EAI_FAIL;
+
+#ifdef HAVE_SA_LEN /*XXX*/
+ if (sa->sa_len != salen)
+ return EAI_FAIL;
+#endif
+
+ family = sa->sa_family;
+ for (i = 0; afdl[i].a_af; i++)
+ if (afdl[i].a_af == family) {
+ afd = &afdl[i];
+ goto found;
+ }
+ return EAI_FAMILY;
+
+ found:
+ if (salen != afd->a_socklen)
+ return EAI_FAIL;
+
+ /* network byte order */
+ memcpy(&port, (const char *)sa + afd->a_portoff, sizeof(port));
+ addr = (const char *)sa + afd->a_off;
+
+ if (serv == NULL || servlen == 0) {
+ /*
+ * do nothing in this case.
+ * in case you are wondering if "&&" is more correct than
+ * "||" here: RFC3493 says that serv == NULL OR servlen == 0
+ * means that the caller does not want the result.
+ */
+ } else {
+ if (flags & NI_NUMERICSERV)
+ sp = NULL;
+ else {
+ sp = getservbyport(port,
+ (flags & NI_DGRAM) ? "udp" : "tcp");
+ }
+ if (sp) {
+ if (strlen(sp->s_name) + 1 > servlen)
+ return EAI_OVERFLOW;
+ strncpy(serv, sp->s_name, servlen);
+ } else {
+ snprintf(numserv, sizeof(numserv), "%u", ntohs(port));
+ if (strlen(numserv) + 1 > servlen)
+ return EAI_OVERFLOW;
+ strncpy(serv, numserv, servlen);
+ }
+ }
+
+ switch (sa->sa_family) {
+ case AF_INET:
+ v4a = (u_int32_t)
+ ntohl(((const struct sockaddr_in *)sa)->sin_addr.s_addr);
+ if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
+ flags |= NI_NUMERICHOST;
+ v4a >>= IN_CLASSA_NSHIFT;
+ if (v4a == 0)
+ flags |= NI_NUMERICHOST;
+ break;
+#ifdef INET6
+ case AF_INET6:
+ {
+ const struct sockaddr_in6 *sin6;
+ sin6 = (const struct sockaddr_in6 *)sa;
+ switch (sin6->sin6_addr.s6_addr[0]) {
+ case 0x00:
+ if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
+ ;
+ else if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
+ ;
+ else
+ flags |= NI_NUMERICHOST;
+ break;
+ default:
+ if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
+ flags |= NI_NUMERICHOST;
+ else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
+ flags |= NI_NUMERICHOST;
+ break;
+ }
+ }
+ break;
+#endif
+ }
+ if (host == NULL || hostlen == 0) {
+ /*
+ * do nothing in this case.
+ * in case you are wondering if "&&" is more correct than
+ * "||" here: RFC3493 says that host == NULL or hostlen == 0
+ * means that the caller does not want the result.
+ */
+ } else if (flags & NI_NUMERICHOST) {
+ /* NUMERICHOST and NAMEREQD conflicts with each other */
+ if (flags & NI_NAMEREQD)
+ return EAI_NONAME;
+
+ goto numeric;
+ } else {
+#ifdef USE_GETIPNODEBY
+ hp = getipnodebyaddr(addr, afd->a_addrlen, afd->a_af, &h_error);
+#else
+ hp = gethostbyaddr(addr, afd->a_addrlen, afd->a_af);
+#ifdef HAVE_H_ERRNO
+ h_error = h_errno;
+#else
+ h_error = EINVAL;
+#endif
+#endif
+
+ if (hp) {
+#if 0
+ if (flags & NI_NOFQDN) {
+ /*
+ * According to RFC3493 section 6.2, NI_NOFQDN
+ * means "node name portion of the FQDN shall
+ * be returned for local hosts." The following
+ * code tries to implement it by returning the
+ * first label (the part before the first
+ * period) of the FQDN. However, it is not
+ * clear if this always makes sense, since the
+ * given address may be outside of "local
+ * hosts." Due to the unclear description, we
+ * disable the code in this implementation.
+ */
+ char *p;
+ p = strchr(hp->h_name, '.');
+ if (p)
+ *p = '\0';
+ }
+#endif
+ if (strlen(hp->h_name) + 1 > hostlen) {
+#ifdef USE_GETIPNODEBY
+ freehostent(hp);
+#endif
+ return EAI_OVERFLOW;
+ }
+ strncpy(host, hp->h_name, hostlen);
+#ifdef USE_GETIPNODEBY
+ freehostent(hp);
+#endif
+ } else {
+ if (flags & NI_NAMEREQD)
+ return EAI_NONAME;
+
+ numeric:
+ switch(afd->a_af) {
+#ifdef INET6
+ case AF_INET6:
+ {
+ int error;
+
+ if ((error = ip6_parsenumeric(sa, addr, host,
+ hostlen,
+ flags)) != 0)
+ return(error);
+ break;
+ }
+#endif
+ default:
+ if (xinet_ntop(afd->a_af, addr, host,
+ hostlen) == NULL)
+ return EAI_SYSTEM;
+ break;
+ }
+ }
+ }
+ return(0);
+}
+
+#ifdef INET6
+static int
+ip6_parsenumeric(sa, addr, host, hostlen, flags)
+ const struct sockaddr *sa;
+ const char *addr;
+ char *host;
+ size_t hostlen;
+ int flags;
+{
+ int numaddrlen;
+ char numaddr[512];
+
+ if (xinet_ntop(AF_INET6, addr, numaddr, sizeof(numaddr)) == NULL)
+ return EAI_SYSTEM;
+
+ numaddrlen = strlen(numaddr);
+ if (numaddrlen + 1 > hostlen) /* don't forget terminator */
+ return EAI_OVERFLOW;
+ strncpy(host, numaddr, hostlen);
+
+ if (((const struct sockaddr_in6 *)sa)->sin6_scope_id) {
+ char zonebuf[SQUIDHOSTNAMELEN];
+ int zonelen;
+
+ zonelen = ip6_sa2str(
+ (const struct sockaddr_in6 *)(const void *)sa,
+ zonebuf, sizeof(zonebuf), flags);
+ if (zonelen < 0)
+ return EAI_OVERFLOW;
+ if (zonelen + 1 + numaddrlen + 1 > hostlen)
+ return EAI_OVERFLOW;
+
+ /* construct <numeric-addr><delim><zoneid> */
+ memcpy(host + numaddrlen + 1, zonebuf,
+ (size_t)zonelen);
+ host[numaddrlen] = SCOPE_DELIMITER;
+ host[numaddrlen + 1 + zonelen] = '\0';
+ }
+
+ return 0;
+}
+
+/* ARGSUSED */
+static int
+ip6_sa2str(sa6, buf, bufsiz, flags)
+ const struct sockaddr_in6 *sa6;
+ char *buf;
+ size_t bufsiz;
+ int flags;
+{
+ unsigned int ifindex;
+ const struct in6_addr *a6;
+ int n;
+
+ ifindex = (unsigned int)sa6->sin6_scope_id;
+ a6 = &sa6->sin6_addr;
+
+#ifdef NI_NUMERICSCOPE
+ if ((flags & NI_NUMERICSCOPE) != 0) {
+ n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id);
+ if (n < 0 || n >= bufsiz)
+ return -1;
+ else
+ return n;
+ }
+#endif
+
+ /* if_indextoname() does not take buffer size. not a good api... */
+ if ((IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6) ||
+ IN6_IS_ADDR_MC_NODELOCAL(a6)) && bufsiz >= IF_NAMESIZE) {
+ char *p = if_indextoname(ifindex, buf);
+ if (p)
+ return (strlen(p));
+ }
+
+ /* last resort */
+ n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id);
+ if (n < 0 || n >= bufsiz)
+ return -1;
+ else
+ return n;
+}
+#endif /* INET6 */
+#endif
--- /dev/null
+/*
+ * Shamelessly duplicated from the bind9 public sources
+ * for use by the Squid Project under ISC written permission
+ * included "as found" below.
+ *
+ * Update/Maintenance History:
+ *
+ * 24-Sep-2007 : Copied from bind 9.3.3
+ * - Added protection around libray headers
+ * - Altered configure checks
+ * - Un-hacked slightly to use system gethostbyname()
+ *
+ * 06-Oct-2007 : Various fixes to allow the build on MinGW
+ *
+ * 28-Oct-2007: drop some dead code. now tested working without.
+ *
+ * Squid CVS $Id: inet_ntop.c,v 1.1 2007/12/14 05:03:26 amosjeffries Exp $
+ *
+ * Original License and code follows.
+ */
+
+#include "config.h"
+
+#ifndef HAVE_INET_NTOP
+
+/*
+ * 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static const char rcsid[] = "inet_ntop.c,v 1.1.2.1.8.2 2005/11/03 23:08:40 marka Exp";
+#endif /* LIBC_SCCS and not lint */
+
+#if HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#if HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
+#if HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#if HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#if HAVE_ARPA_NAMESER_H
+#include <arpa/nameser.h>
+#endif
+
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+
+#ifdef SPRINTF_CHAR
+# define SPRINTF(x) strlen(sprintf/**/x)
+#else
+# define SPRINTF(x) ((size_t)sprintf x)
+#endif
+
+#if ! defined(NS_INADDRSZ)
+#define NS_INADDRSZ 4
+#endif
+#if ! defined(NS_IN6ADDRSZ)
+#define NS_IN6ADDRSZ 16
+#endif
+#if ! defined(NS_INT16SZ)
+#define NS_INT16SZ 2
+#endif
+
+/*
+ * 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 u_char *src, char *dst, size_t size);
+static const char *inet_ntop6 (const u_char *src, char *dst, size_t size);
+
+/* char *
+ * inet_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 *
+xinet_ntop(af, src, dst, size)
+ int af;
+ const void *src;
+ char *dst;
+ size_t size;
+{
+ switch (af) {
+ case AF_INET:
+ return (inet_ntop4(src, dst, size));
+ case AF_INET6:
+ return (inet_ntop6(src, dst, size));
+ 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 u_char* not an in_addr as input
+ * author:
+ * Paul Vixie, 1996.
+ */
+static const char *
+inet_ntop4(src, dst, size)
+ const u_char *src;
+ char *dst;
+ size_t size;
+{
+ static const char fmt[] = "%u.%u.%u.%u";
+ char tmp[sizeof "255.255.255.255"];
+
+ if (SPRINTF((tmp, fmt, src[0], src[1], src[2], src[3])) >= size) {
+ errno = ENOSPC;
+ return (NULL);
+ }
+ strcpy(dst, tmp);
+ return (dst);
+}
+
+/* const char *
+ * inet_ntop6(src, dst, size)
+ * convert IPv6 binary address into presentation (printable) format
+ * author:
+ * Paul Vixie, 1996.
+ */
+static const char *
+inet_ntop6(src, dst, size)
+ const u_char *src;
+ 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"], *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;
+ }
+ }
+ }
+ 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))) {
+ if (!inet_ntop4(src+12, tp, sizeof tmp - (tp - tmp)))
+ 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';
+
+ /*
+ * Check for overflow, copy, and we're done.
+ */
+ if ((size_t)(tp - tmp) > size) {
+ errno = ENOSPC;
+ return (NULL);
+ }
+ strcpy(dst, tmp);
+ return (dst);
+}
+
+#endif /* HAVE_INET_NTOP */
--- /dev/null
+/*
+ * Shamelessly duplicated from the bind9 public sources
+ * for use by the Squid Project under ISC written permission
+ * included "as found" below.
+ *
+ * Update/Maintenance History:
+ *
+ * 24-Sep-2007 : Copied from bind 9.3.3
+ * - Added protection around libray headers
+ * - Altered configure checks to import
+ *
+ * 06-Oct-2007 : Various fixes to allow the build on MinGW
+ *
+ * 28-Oct-2007: drop some dead code. now tested working without.
+ *
+ * Squid CVS $Id: inet_pton.c,v 1.1 2007/12/14 05:03:26 amosjeffries Exp $
+ *
+ * Original License and code follows.
+ */
+
+#include "config.h"
+
+#ifndef HAVE_INET_PTON
+
+/*
+ * 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static const char rcsid[] = "inet_pton.c,v 1.2.206.2 2005/07/28 07:43:18 marka Exp";
+#endif /* LIBC_SCCS and not lint */
+
+#if HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#if HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#if HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#if ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#if HAVE_ARPA_NAMESER_H
+#include <arpa/nameser.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#if ! defined(NS_INADDRSZ)
+#define NS_INADDRSZ 4
+#endif
+#if ! defined(NS_IN6ADDRSZ)
+#define NS_IN6ADDRSZ 16
+#endif
+#if ! defined(NS_INT16SZ)
+#define NS_INT16SZ 2
+#endif
+
+/*
+ * 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 int inet_pton4 (const char *src, u_char *dst);
+static int inet_pton6 (const char *src, u_char *dst);
+
+/* int
+ * inet_pton(af, src, dst)
+ * convert from presentation format (which usually means ASCII printable)
+ * to network format (which is usually some kind of binary format).
+ * return:
+ * 1 if the address was valid for the specified address family
+ * 0 if the address wasn't valid (`dst' is untouched in this case)
+ * -1 if some other error occurred (`dst' is untouched in this case, too)
+ * author:
+ * Paul Vixie, 1996.
+ */
+int
+xinet_pton(af, src, dst)
+ int af;
+ const char *src;
+ void *dst;
+{
+ switch (af) {
+ case AF_INET:
+ return (inet_pton4(src, dst));
+ case AF_INET6:
+ return (inet_pton6(src, dst));
+ default:
+ errno = EAFNOSUPPORT;
+ return (-1);
+ }
+ /* NOTREACHED */
+}
+
+/* int
+ * inet_pton4(src, dst)
+ * like inet_aton() but without all the hexadecimal and shorthand.
+ * return:
+ * 1 if `src' is a valid dotted quad, else 0.
+ * notice:
+ * does not touch `dst' unless it's returning 1.
+ * author:
+ * Paul Vixie, 1996.
+ */
+static int
+inet_pton4(src, dst)
+ const char *src;
+ u_char *dst;
+{
+ static const char digits[] = "0123456789";
+ int saw_digit, octets, ch;
+ u_char tmp[NS_INADDRSZ], *tp;
+
+ saw_digit = 0;
+ octets = 0;
+ *(tp = tmp) = 0;
+ while ((ch = *src++) != '\0') {
+ const char *pch;
+
+ if ((pch = strchr(digits, ch)) != NULL) {
+ u_int new = *tp * 10 + (pch - digits);
+
+ if (saw_digit && *tp == 0)
+ return (0);
+ if (new > 255)
+ return (0);
+ *tp = new;
+ if (!saw_digit) {
+ if (++octets > 4)
+ return (0);
+ saw_digit = 1;
+ }
+ } else if (ch == '.' && saw_digit) {
+ if (octets == 4)
+ return (0);
+ *++tp = 0;
+ saw_digit = 0;
+ } else
+ return (0);
+ }
+ if (octets < 4)
+ return (0);
+ memcpy(dst, tmp, NS_INADDRSZ);
+ return (1);
+}
+
+/* int
+ * inet_pton6(src, dst)
+ * convert presentation level address to network order binary form.
+ * return:
+ * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
+ * notice:
+ * (1) does not touch `dst' unless it's returning 1.
+ * (2) :: in a full address is silently ignored.
+ * credit:
+ * inspired by Mark Andrews.
+ * author:
+ * Paul Vixie, 1996.
+ */
+static int
+inet_pton6(src, dst)
+ const char *src;
+ u_char *dst;
+{
+ static const char xdigits_l[] = "0123456789abcdef",
+ xdigits_u[] = "0123456789ABCDEF";
+ u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
+ const char *xdigits, *curtok;
+ int ch, seen_xdigits;
+ u_int val;
+
+ memset((tp = tmp), '\0', NS_IN6ADDRSZ);
+ endp = tp + NS_IN6ADDRSZ;
+ colonp = NULL;
+ /* Leading :: requires some special handling. */
+ if (*src == ':')
+ if (*++src != ':')
+ return (0);
+ curtok = src;
+ seen_xdigits = 0;
+ val = 0;
+ while ((ch = *src++) != '\0') {
+ const char *pch;
+
+ if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
+ pch = strchr((xdigits = xdigits_u), ch);
+ if (pch != NULL) {
+ val <<= 4;
+ val |= (pch - xdigits);
+ if (++seen_xdigits > 4)
+ return (0);
+ continue;
+ }
+ if (ch == ':') {
+ curtok = src;
+ if (!seen_xdigits) {
+ if (colonp)
+ return (0);
+ colonp = tp;
+ continue;
+ } else if (*src == '\0') {
+ return (0);
+ }
+ if (tp + NS_INT16SZ > endp)
+ return (0);
+ *tp++ = (u_char) (val >> 8) & 0xff;
+ *tp++ = (u_char) val & 0xff;
+ seen_xdigits = 0;
+ val = 0;
+ continue;
+ }
+ if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
+ inet_pton4(curtok, tp) > 0) {
+ tp += NS_INADDRSZ;
+ seen_xdigits = 0;
+ break; /* '\0' was seen by inet_pton4(). */
+ }
+ return (0);
+ }
+ if (seen_xdigits) {
+ if (tp + NS_INT16SZ > endp)
+ return (0);
+ *tp++ = (u_char) (val >> 8) & 0xff;
+ *tp++ = (u_char) val & 0xff;
+ }
+ if (colonp != NULL) {
+ /*
+ * Since some memmove()'s erroneously fail to handle
+ * overlapping regions, we'll do the shift by hand.
+ */
+ const int n = tp - colonp;
+ int i;
+
+ if (tp == endp)
+ return (0);
+ for (i = 1; i <= n; i++) {
+ endp[- i] = colonp[n - i];
+ colonp[n - i] = 0;
+ }
+ tp = endp;
+ }
+ if (tp != endp)
+ return (0);
+ memcpy(dst, tmp, NS_IN6ADDRSZ);
+ return (1);
+}
+
+#endif /* HAVE_INET_PTON */
projects / thirdparty / squid.git / commitdiff
