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-rw-r--r--ares/CHANGES4
-rw-r--r--ares/Makefile.inc34
-rw-r--r--ares/configure.ac512
-rw-r--r--ares/inet_ntop.c210
-rw-r--r--ares/inet_ntop.h26
5 files changed, 531 insertions, 255 deletions
diff --git a/ares/CHANGES b/ares/CHANGES
index 8acbf0811..eb38613c1 100644
--- a/ares/CHANGES
+++ b/ares/CHANGES
@@ -1,5 +1,9 @@
Changelog for the c-ares project
+* May 14
+
+- Added an inet_ntop function from BIND for systems that do not have it.
+
* April 9
- Made sortlist support IPv6 (this can probably use some testing).
diff --git a/ares/Makefile.inc b/ares/Makefile.inc
index 0d05c7bc5..121fa6bb7 100644
--- a/ares/Makefile.inc
+++ b/ares/Makefile.inc
@@ -1,17 +1,17 @@
-CSOURCES = ares_fds.c ares_process.c ares_free_hostent.c ares_query.c \
-ares__close_sockets.c ares_free_string.c ares_search.c ares__get_hostent.c \
-ares_gethostbyaddr.c ares_send.c ares__read_line.c ares_gethostbyname.c \
-ares_strerror.c ares_cancel.c ares_init.c ares_timeout.c ares_destroy.c \
-ares_mkquery.c ares_version.c ares_expand_name.c ares_parse_a_reply.c \
-windows_port.c ares_expand_string.c ares_parse_ptr_reply.c \
-ares_parse_aaaa_reply.c inet_net_pton.c bitncmp.c
-
-HHEADERS = ares.h ares_private.h setup.h ares_dns.h ares_version.h nameser.h \
- inet_net_pton.h ares_ipv6.h bitncmp.h
-
-MANPAGES= ares_destroy.3 ares_expand_name.3 ares_expand_string.3 ares_fds.3 \
- ares_free_hostent.3 ares_free_string.3 ares_gethostbyaddr.3 \
- ares_gethostbyname.3 ares_init.3 ares_init_options.3 ares_mkquery.3 \
- ares_parse_a_reply.3 ares_parse_ptr_reply.3 ares_process.3 \
- ares_query.3 ares_search.3 ares_send.3 ares_strerror.3 ares_timeout.3 \
- ares_version.3 ares_cancel.3 ares_parse_aaaa_reply.3
+CSOURCES = ares_fds.c ares_process.c ares_free_hostent.c ares_query.c \
+ares__close_sockets.c ares_free_string.c ares_search.c ares__get_hostent.c \
+ares_gethostbyaddr.c ares_send.c ares__read_line.c ares_gethostbyname.c \
+ares_strerror.c ares_cancel.c ares_init.c ares_timeout.c ares_destroy.c \
+ares_mkquery.c ares_version.c ares_expand_name.c ares_parse_a_reply.c \
+windows_port.c ares_expand_string.c ares_parse_ptr_reply.c \
+ares_parse_aaaa_reply.c inet_net_pton.c bitncmp.c inet_ntop.c
+
+HHEADERS = ares.h ares_private.h setup.h ares_dns.h ares_version.h nameser.h \
+ inet_net_pton.h ares_ipv6.h bitncmp.h
+
+MANPAGES= ares_destroy.3 ares_expand_name.3 ares_expand_string.3 ares_fds.3 \
+ ares_free_hostent.3 ares_free_string.3 ares_gethostbyaddr.3 \
+ ares_gethostbyname.3 ares_init.3 ares_init_options.3 ares_mkquery.3 \
+ ares_parse_a_reply.3 ares_parse_ptr_reply.3 ares_process.3 \
+ ares_query.3 ares_search.3 ares_send.3 ares_strerror.3 ares_timeout.3 \
+ ares_version.3 ares_cancel.3 ares_parse_aaaa_reply.3
diff --git a/ares/configure.ac b/ares/configure.ac
index b4774d9bf..411ca0c0e 100644
--- a/ares/configure.ac
+++ b/ares/configure.ac
@@ -1,238 +1,274 @@
-dnl Process this file with autoconf to produce a configure script.
-AC_INIT(ares_init.c)
-AM_CONFIG_HEADER(config.h)
-AM_MAINTAINER_MODE
-AM_INIT_AUTOMAKE(c-ares, CVS)
-
-AC_PROG_CC
-AC_PROG_INSTALL
-
-case $host_os in
-solaris*)
- AC_DEFINE(ETC_INET, 1, [if a /etc/inet dir is being used])
- ;;
-esac
-
-# check for ssize_t
-AC_CHECK_TYPE(ssize_t, ,
- AC_DEFINE(ssize_t, int, [the signed version of size_t]))
-
-AC_SEARCH_LIBS(gethostbyname, nsl)
-AC_SEARCH_LIBS(socket, socket)
-
-dnl ************************************************************
-dnl Option to switch on debug options. This makes an assumption that
-dnl this is built as an 'ares' subdir in the curl source tree. Subject for
-dnl improval in the future!
-dnl
-AC_MSG_CHECKING([whether to enable debug options])
-AC_ARG_ENABLE(debug,
-AC_HELP_STRING([--enable-debug],[Enable pedantic debug options])
-AC_HELP_STRING([--disable-debug],[Disable debug options]),
-[ case "$enableval" in
- no)
- AC_MSG_RESULT(no)
- ;;
- *) AC_MSG_RESULT(yes)
-
- dnl when doing the debug stuff, use static library only
- AC_DISABLE_SHARED
-
- dnl Checks for standard header files, to make memdebug.h inclusions bettter
- AC_HEADER_STDC
-
- dnl the entire --enable-debug is a hack that lives and runs on top of
- dnl libcurl stuff so this BUILDING_LIBCURL is not THAT much uglier
- AC_DEFINE(BUILDING_LIBCURL, 1, [when building as static part of libcurl])
-
- CPPFLAGS="$CPPFLAGS -DCURLDEBUG -I$srcdir/../include"
- CFLAGS="$CFLAGS -g"
-
- dnl set compiler "debug" options to become more picky, and remove
- dnl optimize options from CFLAGS
- CURL_CC_DEBUG_OPTS
-
- ;;
- esac ],
- AC_MSG_RESULT(no)
-)
-
-AC_PROG_LIBTOOL
-
-dnl check for a few basic system headers we need
-AC_CHECK_HEADERS(
- sys/types.h \
- sys/time.h \
- sys/select.h \
- sys/socket.h \
- winsock.h \
- netinet/in.h \
- arpa/nameser.h \
- arpa/nameser_compat.h \
- arpa/inet.h, , ,
-[
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-dnl We do this default-include simply to make sure that the nameser_compat.h
-dnl header *REALLY* can be include after the new nameser.h. It seems AIX 5.1
-dnl (and others?) is not designed to allow this.
-#ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
-#endif
-]
- )
-
-dnl check for AF_INET6
-CARES_CHECK_CONSTANT(
- [
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_WINSOCK_H
-#include <winsock.h>
-#endif
-
- ], [PF_INET6],
- AC_DEFINE_UNQUOTED(HAVE_PF_INET6,1,[Define to 1 if you have PF_INET6.])
-)
-
-dnl check for PF_INET6
-CARES_CHECK_CONSTANT(
- [
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_WINSOCK_H
-#include <winsock.h>
-#endif
-
- ], [AF_INET6],
- AC_DEFINE_UNQUOTED(HAVE_AF_INET6,1,[Define to 1 if you have AF_INET6.])
-)
-
-
-dnl check for the in6_addr structure
-CARES_CHECK_STRUCT(
- [
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_WINSOCK_H
-#include <winsock.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
- ], [in6_addr],
- AC_DEFINE_UNQUOTED(HAVE_STRUCT_IN6_ADDR,1,[Define to 1 if you have struct in6_addr.])
-)
-
-dnl check for inet_pton
-AC_CHECK_FUNCS(inet_pton)
-dnl Some systems have it, but not IPv6
-if test "$ac_cv_func_inet_pton" = "yes" ; then
-AC_MSG_CHECKING(if inet_pton supports IPv6)
-AC_TRY_RUN(
- [
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_WINSOCK_H
-#include <winsock.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-int main()
- {
- struct in6_addr addr6;
- if (inet_pton(AF_INET6, "::1", &addr6) < 1)
- exit(1);
- else
- exit(0);
- }
- ], [
- AC_MSG_RESULT(yes)
- AC_DEFINE_UNQUOTED(HAVE_INET_PTON_IPV6,1,[Define to 1 if inet_pton supports IPv6.])
- ], AC_MSG_RESULT(no),AC_MSG_RESULT(no))
-fi
-dnl Check for inet_net_pton
-AC_CHECK_FUNCS(inet_net_pton)
-dnl Again, some systems have it, but not IPv6
-if test "$ac_cv_func_inet_net_pton" = "yes" ; then
-AC_MSG_CHECKING(if inet_net_pton supports IPv6)
-AC_TRY_RUN(
- [
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_WINSOCK_H
-#include <winsock.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-int main()
- {
- struct in6_addr addr6;
- if (inet_net_pton(AF_INET6, "::1", &addr6, sizeof(addr6)) < 1)
- exit(1);
- else
- exit(0);
- }
- ], [
- AC_MSG_RESULT(yes)
- AC_DEFINE_UNQUOTED(HAVE_INET_NET_PTON_IPV6,1,[Define to 1 if inet_net_pton supports IPv6.])
- ], AC_MSG_RESULT(no),AC_MSG_RESULT(no))
-fi
-
-AC_CHECK_SIZEOF(struct in6_addr, ,
-[
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_WINSOCK_H
-#include <winsock.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-]
-)
-AC_CHECK_SIZEOF(struct in_addr, ,
-[
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_WINSOCK_H
-#include <winsock.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-]
-)
-
-AC_CHECK_FUNCS(bitncmp)
-
-
-AC_OUTPUT(Makefile)
+dnl Process this file with autoconf to produce a configure script.
+AC_INIT(ares_init.c)
+AM_CONFIG_HEADER(config.h)
+AM_MAINTAINER_MODE
+AM_INIT_AUTOMAKE(c-ares, CVS)
+
+AC_PROG_CC
+AC_PROG_INSTALL
+
+case $host_os in
+solaris*)
+ AC_DEFINE(ETC_INET, 1, [if a /etc/inet dir is being used])
+ ;;
+esac
+
+# check for ssize_t
+AC_CHECK_TYPE(ssize_t, ,
+ AC_DEFINE(ssize_t, int, [the signed version of size_t]))
+
+AC_SEARCH_LIBS(gethostbyname, nsl)
+AC_SEARCH_LIBS(socket, socket)
+
+dnl ************************************************************
+dnl Option to switch on debug options. This makes an assumption that
+dnl this is built as an 'ares' subdir in the curl source tree. Subject for
+dnl improval in the future!
+dnl
+AC_MSG_CHECKING([whether to enable debug options])
+AC_ARG_ENABLE(debug,
+AC_HELP_STRING([--enable-debug],[Enable pedantic debug options])
+AC_HELP_STRING([--disable-debug],[Disable debug options]),
+[ case "$enableval" in
+ no)
+ AC_MSG_RESULT(no)
+ ;;
+ *) AC_MSG_RESULT(yes)
+
+ dnl when doing the debug stuff, use static library only
+ AC_DISABLE_SHARED
+
+ dnl Checks for standard header files, to make memdebug.h inclusions bettter
+ AC_HEADER_STDC
+
+ dnl the entire --enable-debug is a hack that lives and runs on top of
+ dnl libcurl stuff so this BUILDING_LIBCURL is not THAT much uglier
+ AC_DEFINE(BUILDING_LIBCURL, 1, [when building as static part of libcurl])
+
+ CPPFLAGS="$CPPFLAGS -DCURLDEBUG -I$srcdir/../include"
+ CFLAGS="$CFLAGS -g"
+
+ dnl set compiler "debug" options to become more picky, and remove
+ dnl optimize options from CFLAGS
+ CURL_CC_DEBUG_OPTS
+
+ ;;
+ esac ],
+ AC_MSG_RESULT(no)
+)
+
+AC_PROG_LIBTOOL
+
+dnl check for a few basic system headers we need
+AC_CHECK_HEADERS(
+ sys/types.h \
+ sys/time.h \
+ sys/select.h \
+ sys/socket.h \
+ winsock.h \
+ netinet/in.h \
+ arpa/nameser.h \
+ arpa/nameser_compat.h \
+ arpa/inet.h, , ,
+[
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+dnl We do this default-include simply to make sure that the nameser_compat.h
+dnl header *REALLY* can be include after the new nameser.h. It seems AIX 5.1
+dnl (and others?) is not designed to allow this.
+#ifdef HAVE_ARPA_NAMESER_H
+#include <arpa/nameser.h>
+#endif
+]
+ )
+
+dnl check for AF_INET6
+CARES_CHECK_CONSTANT(
+ [
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
+
+ ], [PF_INET6],
+ AC_DEFINE_UNQUOTED(HAVE_PF_INET6,1,[Define to 1 if you have PF_INET6.])
+)
+
+dnl check for PF_INET6
+CARES_CHECK_CONSTANT(
+ [
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
+
+ ], [AF_INET6],
+ AC_DEFINE_UNQUOTED(HAVE_AF_INET6,1,[Define to 1 if you have AF_INET6.])
+)
+
+
+dnl check for the in6_addr structure
+CARES_CHECK_STRUCT(
+ [
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+ ], [in6_addr],
+ AC_DEFINE_UNQUOTED(HAVE_STRUCT_IN6_ADDR,1,[Define to 1 if you have struct in6_addr.])
+)
+
+dnl check for inet_pton
+AC_CHECK_FUNCS(inet_pton)
+dnl Some systems have it, but not IPv6
+if test "$ac_cv_func_inet_pton" = "yes" ; then
+AC_MSG_CHECKING(if inet_pton supports IPv6)
+AC_TRY_RUN(
+ [
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+int main()
+ {
+ struct in6_addr addr6;
+ if (inet_pton(AF_INET6, "::1", &addr6) < 1)
+ exit(1);
+ else
+ exit(0);
+ }
+ ], [
+ AC_MSG_RESULT(yes)
+ AC_DEFINE_UNQUOTED(HAVE_INET_PTON_IPV6,1,[Define to 1 if inet_pton supports IPv6.])
+ ], AC_MSG_RESULT(no),AC_MSG_RESULT(no))
+fi
+dnl Check for inet_net_pton
+AC_CHECK_FUNCS(inet_net_pton)
+dnl Again, some systems have it, but not IPv6
+if test "$ac_cv_func_inet_net_pton" = "yes" ; then
+AC_MSG_CHECKING(if inet_net_pton supports IPv6)
+AC_TRY_RUN(
+ [
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+int main()
+ {
+ struct in6_addr addr6;
+ if (inet_net_pton(AF_INET6, "::1", &addr6, sizeof(addr6)) < 1)
+ exit(1);
+ else
+ exit(0);
+ }
+ ], [
+ AC_MSG_RESULT(yes)
+ AC_DEFINE_UNQUOTED(HAVE_INET_NET_PTON_IPV6,1,[Define to 1 if inet_net_pton supports IPv6.])
+ ], AC_MSG_RESULT(no),AC_MSG_RESULT(no))
+fi
+
+
+dnl Check for inet_ntop
+AC_CHECK_FUNCS(inet_ntop)
+dnl Again, some systems have it, but not IPv6
+if test "$ac_cv_func_inet_ntop" = "yes" ; then
+AC_MSG_CHECKING(if inet_ntop supports IPv6)
+AC_TRY_RUN(
+ [
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#include <errno.h>
+int main()
+ {
+ struct in6_addr addr6;
+ char buf[128];
+ if (inet_ntop(AF_INET6, &addr6, buf, 128) == 0 && errno == EAFNOSUPPORT)
+ exit(1);
+ else
+ exit(0);
+ }
+ ], [
+ AC_MSG_RESULT(yes)
+ AC_DEFINE_UNQUOTED(HAVE_INET_NTOP_IPV6,1,[Define to 1 if inet_ntop supports IPv6.])
+ ], AC_MSG_RESULT(no),AC_MSG_RESULT(no))
+fi
+
+AC_CHECK_SIZEOF(struct in6_addr, ,
+[
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+]
+)
+AC_CHECK_SIZEOF(struct in_addr, ,
+[
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_WINSOCK_H
+#include <winsock.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+]
+)
+
+AC_CHECK_FUNCS(bitncmp)
+
+
+AC_OUTPUT(Makefile)
diff --git a/ares/inet_ntop.c b/ares/inet_ntop.c
new file mode 100644
index 000000000..ff44f82b0
--- /dev/null
+++ b/ares/inet_ntop.c
@@ -0,0 +1,210 @@
+/* Copyright (c) 1996 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.
+ */
+
+#include "setup.h"
+
+#include <sys/types.h>
+
+#if defined(WIN32) && !defined(WATT32)
+#include "nameser.h"
+#else
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_NAMESER_H
+#include <arpa/nameser.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#endif
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "ares_ipv6.h"
+#include "inet_ntop.h"
+
+
+#if !defined(HAVE_INET_NTOP) || !defined(HAVE_INET_NTOP_IPV6)
+
+#ifdef SPRINTF_CHAR
+# define SPRINTF(x) strlen(sprintf/**/x)
+#else
+# define SPRINTF(x) ((size_t)sprintf x)
+#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 unsigned char *src, char *dst, size_t size);
+static const char *inet_ntop6(const unsigned 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 *
+inet_ntop(int af, const void *src, char *dst, size_t size)
+{
+
+ switch (af) {
+ case AF_INET:
+ return (inet_ntop4(src, dst, size));
+#ifdef 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, more or less like inet_ntoa()
+ * 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, 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);
+}
+
+#ifdef INET6
+/* const char *
+ * inet_ntop6(src, dst, size)
+ * convert IPv6 binary address into presentation (printable) format
+ * author:
+ * Paul Vixie, 1996.
+ */
+static const char *
+inet_ntop6(const unsigned 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;
+ unsigned int words[IN6ADDRSZ / 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 < IN6ADDRSZ; i++)
+ words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
+ best.base = -1;
+ cur.base = -1;
+ for (i = 0; i < (IN6ADDRSZ / 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 < (IN6ADDRSZ / 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;
+ }
+ tp += SPRINTF((tp, "%x", words[i]));
+ }
+ /* Was it a trailing run of 0x00's? */
+ if (best.base != -1 && (best.base + best.len) == (IN6ADDRSZ / 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
+
+#endif
diff --git a/ares/inet_ntop.h b/ares/inet_ntop.h
new file mode 100644
index 000000000..f9a1d92f7
--- /dev/null
+++ b/ares/inet_ntop.h
@@ -0,0 +1,26 @@
+/* $Id$ */
+
+/*
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#ifndef INET_NTOP_H
+#define INET_NTOP_H
+
+#ifdef HAVE_INET_NTOP
+#define ares_inet_ntop(w,x,y,z) inet_ntop(w,x,y,z)
+#else
+const char *ares_inet_ntop(int af, const void *src, char *dst, size_t size);
+#endif
+
+#endif /* INET_NET_NTOP_H */
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