Import from gnulib, to support new getaddrinfo implementation of gnulib.

9 files changed, 516 insertions, 0 deletions

diff --git a/lib/inet_ntop.c b/lib/inet_ntop.c
new file mode 100644
index 000000000..8329c827d
--- /dev/null
+++ b/lib/inet_ntop.c
@@ -0,0 +1,239 @@
+/* inet_ntop.c -- convert IPv4 and IPv6 addresses from binary to text form
+   Copyright (c) 2005, 2006  Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/*
+ * 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 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Specification.  */
+#include "inet_ntop.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#ifndef EAFNOSUPPORT
+# define EAFNOSUPPORT EINVAL
+#endif
+
+#define NS_IN6ADDRSZ 16
+#define NS_INT16SZ 2
+
+/*
+ * 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.
+ */
+typedef int verify_int_size[2 * sizeof (int) - 7];
+
+static const char *inet_ntop4 (const unsigned char *src, char *dst, socklen_t size);
+#if HAVE_IPV6
+static const char *inet_ntop6 (const unsigned char *src, char *dst, socklen_t size);
+#endif
+
+
+/* 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 *restrict src,
+	   char *restrict dst, socklen_t cnt)
+{
+  switch (af)
+    {
+#if HAVE_IPV4
+    case AF_INET:
+      return (inet_ntop4 (src, dst, cnt));
+#endif
+
+#if HAVE_IPV6
+    case AF_INET6:
+      return (inet_ntop6 (src, dst, cnt));
+#endif
+
+    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 (const unsigned char *src, char *dst, socklen_t size)
+{
+  char tmp[sizeof "255.255.255.255"];
+  int len;
+
+  len = sprintf (tmp, "%u.%u.%u.%u", src[0], src[1], src[2], src[3]);
+  if (len < 0)
+    return NULL;
+
+  if (len > size)
+    {
+      errno = ENOSPC;
+      return NULL;
+    }
+
+  return strcpy (dst, tmp);
+}
+
+#if HAVE_IPV6
+
+/* 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, socklen_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[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 += 2)
+    words[i / 2] = (src[i] << 8) | src[i + 1];
+  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 == 5 && words[5] == 0xffff)))
+	{
+	  if (!inet_ntop4 (src + 12, tp, sizeof tmp - (tp - tmp)))
+	    return (NULL);
+	  tp += strlen (tp);
+	  break;
+	}
+      {
+	int len = sprintf (tp, "%x", words[i]);
+	if (len < 0)
+	  return NULL;
+	tp += len;
+      }
+    }
+  /* 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 strcpy (dst, tmp);
+}
+
+#endif
diff --git a/lib/inet_ntop.h b/lib/inet_ntop.h
new file mode 100644
index 000000000..bd1e085ae
--- /dev/null
+++ b/lib/inet_ntop.h
@@ -0,0 +1,42 @@
+/* Convert internet address from internal to printable, presentable format.
+   Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+/* Converts an internet address from internal format to a printable,
+   presentable format.
+   AF is an internet address family, such as AF_INET or AF_INET6.
+   SRC points to a 'struct in_addr' (for AF_INET) or 'struct in6_addr'
+   (for AF_INET6).
+   DST points to a buffer having room for CNT bytes.
+   The printable representation of the address (in numeric form, not
+   surrounded by [...], no reverse DNS is done) is placed in DST, and
+   DST is returned.  If an error occurs, the return value is NULL and
+   errno is set.  If CNT bytes are not sufficient to hold the result,
+   the return value is NULL and errno is set to ENOSPC.  A good value
+   for CNT is 46.
+
+   For more details, see the POSIX:2001 specification
+   <http://www.opengroup.org/susv3xsh/inet_ntop.html>.  */
+
+#if !HAVE_DECL_INET_NTOP
+extern const char *inet_ntop (int af, const void *restrict src,
+			      char *restrict dst, socklen_t cnt);
+#endif
diff --git a/lib/snprintf.c b/lib/snprintf.c
new file mode 100644
index 000000000..c281f7c58
--- /dev/null
+++ b/lib/snprintf.c
@@ -0,0 +1,76 @@
+/* Formatted output to strings.
+   Copyright (C) 2004, 2006 Free Software Foundation, Inc.
+   Written by Simon Josefsson and Paul Eggert.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "snprintf.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "vasnprintf.h"
+
+/* Some systems, like OSF/1 4.0 and Woe32, don't have EOVERFLOW.  */
+#ifndef EOVERFLOW
+# define EOVERFLOW E2BIG
+#endif
+
+/* Print formatted output to string STR.  Similar to sprintf, but
+   additional length SIZE limit how much is written into STR.  Returns
+   string length of formatted string (which may be larger than SIZE).
+   STR may be NULL, in which case nothing will be written.  On error,
+   return a negative value. */
+int
+snprintf (char *str, size_t size, const char *format, ...)
+{
+  char *output;
+  size_t len;
+  va_list args;
+
+  va_start (args, format);
+  len = size;
+  output = vasnprintf (str, &len, format, args);
+  va_end (args);
+
+  if (!output)
+    return -1;
+
+  if (output != str)
+    {
+      if (size)
+	{
+	  memcpy (str, output, size - 1);
+	  str[size - 1] = '\0';
+	}
+
+      free (output);
+    }
+
+  if (INT_MAX < len)
+    {
+      errno = EOVERFLOW;
+      return -1;
+    }
+
+  return len;
+}
diff --git a/lib/snprintf.h b/lib/snprintf.h
new file mode 100644
index 000000000..5032b9e8f
--- /dev/null
+++ b/lib/snprintf.h
@@ -0,0 +1,29 @@
+/* Formatted output to strings.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef SNPRINTF_H
+#define SNPRINTF_H
+
+/* Get snprintf declaration, if available.  */
+#include <stdio.h>
+
+#if defined HAVE_DECL_SNPRINTF && !HAVE_DECL_SNPRINTF
+int snprintf (char *str, size_t size, const char *format, ...);
+#endif
+
+#endif /* SNPRINTF_H */
diff --git a/lib/socket_.h b/lib/socket_.h
new file mode 100644
index 000000000..fbf048333
--- /dev/null
+++ b/lib/socket_.h
@@ -0,0 +1,60 @@
+/* Provide a sys/socket header file for systems lacking it (read: MinGW).
+   Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef _SYS_SOCKET_H
+#define _SYS_SOCKET_H
+
+/* This file is supposed to be used on platforms that lack
+   sys/socket.h.  It is intended to provide definitions and prototypes
+   needed by an application.
+
+   Currently only MinGW is supported.  See the gnulib manual regarding
+   Windows sockets.  MinGW has the header files winsock2.h and
+   ws2tcpip.h that declare the sys/socket.h definitions we need.  Note
+   that you can influence which definitions you get by setting the
+   WINVER symbol before including these two files.  For example,
+   getaddrinfo is only available if _WIN32_WINNT >= 0x0501 (that
+   symbol is set indiriectly through WINVER).  You can set this by
+   adding AC_DEFINE(WINVER, 0x0501) to configure.ac.  Note that your
+   code may not run on older Windows releases then.  My Windows 2000
+   box was not able to run the code, for example.  The situation is
+   slightly confusing because:
+   http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/getaddrinfo_2.asp
+   suggests that getaddrinfo should be available on all Windows
+   releases. */
+
+
+#if HAVE_WINSOCK2_H
+# include <winsock2.h>
+#endif
+#if HAVE_WS2TCPIP_H
+# include <ws2tcpip.h>
+#endif
+
+/* For shutdown(). */
+#if !defined SHUT_RD && defined SD_RECEIVE
+# define SHUT_RD SD_RECEIVE
+#endif
+#if !defined SHUT_WR && defined SD_SEND
+# define SHUT_WR SD_SEND
+#endif
+#if !defined SHUT_RDWR && defined SD_BOTH
+# define SHUT_RDWR SD_BOTH
+#endif
+
+#endif /* _SYS_SOCKET_H */
diff --git a/m4/arpa_inet_h.m4 b/m4/arpa_inet_h.m4
new file mode 100644
index 000000000..d01d0984e
--- /dev/null
+++ b/m4/arpa_inet_h.m4
@@ -0,0 +1,18 @@
+# arpa_inet_h.m4 serial 1
+dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Simon Josefsson
+
+AC_DEFUN([gl_HEADER_ARPA_INET],
+[
+  AC_CHECK_HEADERS_ONCE([arpa/inet.h])
+  if test $ac_cv_header_arpa_inet_h = yes; then
+    ARPA_INET_H=''
+  else
+    ARPA_INET_H='arpa/inet.h'
+  fi
+  AC_SUBST(ARPA_INET_H)
+])
diff --git a/m4/inet_ntop.m4 b/m4/inet_ntop.m4
new file mode 100644
index 000000000..bb02d2298
--- /dev/null
+++ b/m4/inet_ntop.m4
@@ -0,0 +1,19 @@
+# inet_ntop.m4 serial 3
+dnl Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_INET_NTOP],
+[
+  AC_REPLACE_FUNCS(inet_ntop)
+  gl_PREREQ_INET_NTOP
+])
+
+# Prerequisites of lib/inet_ntop.h and lib/inet_ntop.c.
+AC_DEFUN([gl_PREREQ_INET_NTOP], [
+  AC_CHECK_HEADERS_ONCE([netinet/in.h arpa/inet.h])
+  AC_CHECK_DECLS([inet_ntop],,,[#include <arpa/inet.h>])
+  AC_REQUIRE([gl_SOCKET_FAMILIES])
+  AC_REQUIRE([AC_C_RESTRICT])
+])
diff --git a/m4/netinet_in_h.m4 b/m4/netinet_in_h.m4
new file mode 100644
index 000000000..d73531a05
--- /dev/null
+++ b/m4/netinet_in_h.m4
@@ -0,0 +1,18 @@
+# netinet_in_h.m4 serial 1
+dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Simon Josefsson
+
+AC_DEFUN([gl_HEADER_NETINET_IN],
+[
+  AC_CHECK_HEADERS_ONCE([netinet/in.h])
+  if test $ac_cv_header_netinet_in_h = yes; then
+    NETINET_IN_H=''
+  else
+    NETINET_IN_H='netinet/in.h'
+  fi
+  AC_SUBST(NETINET_IN_H)
+])
diff --git a/m4/snprintf.m4 b/m4/snprintf.m4
new file mode 100644
index 000000000..432e03755
--- /dev/null
+++ b/m4/snprintf.m4
@@ -0,0 +1,15 @@
+# snprintf.m4 serial 2
+dnl Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_SNPRINTF],
+[
+  AC_REPLACE_FUNCS(snprintf)
+  AC_CHECK_DECLS_ONCE(snprintf)
+  gl_PREREQ_SNPRINTF
+])
+
+# Prerequisites of lib/snprintf.c.
+AC_DEFUN([gl_PREREQ_SNPRINTF], [:])