libreplace: Add tests for connect and gethostbyname.

Provide dummy replacements when a function isnt found.
The functions are also searched for in certain libraries,
and variables SOCKET_LIBS and NSL_LIBS are set accordingly.

One purpose of this is to fix the getifaddrs tests on
systems where e.g. the socket calls require special libs
for linking.

Michael

source/lib/replace/libreplace.m4

@@ -344,6 +344,7 @@ m4_include(getpass.m4)
 m4_include(strptime.m4)
 m4_include(win32.m4)
 m4_include(timegm.m4)
+m4_include(socket.m4)
 m4_include(inet_ntop.m4)
 m4_include(inet_pton.m4)
 m4_include(getaddrinfo.m4)

source/lib/replace/replace.h

@@ -340,6 +340,16 @@ ssize_t rep_pwrite(int __fd, const void *__buf, size_t __nbytes, off_t __offset)
 /* prototype is in "system/network.h" */
 #endif
 
+#ifndef HAVE_CONNECT
+#define connect rep_connect
+/* prototype is in "system/network.h" */
+#endif
+
+#ifndef HAVE_GETHOSTBYNAME
+#define gethostbyname rep_gethostbyname
+/* prototype is in "system/network.h" */
+#endif
+
 #ifndef HAVE_GETIFADDRS
 #define getifaddrs rep_getifaddrs
 /* prototype is in "system/network.h" */

source/lib/replace/socket.c

@@ -0,0 +1,35 @@
+/*
+ * Unix SMB/CIFS implementation.
+ *
+ * Dummy replacements for socket functions.
+ *
+ * Copyright (C) Michael Adam <obnox@samba.org> 2008
+ *
+ * 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "replace.h"
+#include "system/network.h"
+
+int rep_connect(int sockfd, const struct sockaddr *serv_addr, socklen_t addrlen)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+struct hostent *rep_gethostbyname(const char *name)
+{
+	errno = ENOSYS;
+	return NULL;
+}

source/lib/replace/socket.m4

@@ -0,0 +1,40 @@
+dnl The following test is roughl taken from the cvs sources.
+dnl
+dnl If we can't find connect, try looking in -lsocket, -lnsl, and -linet.
+dnl The Irix 5 libc.so has connect and gethostbyname, but Irix 5 also has
+dnl libsocket.so which has a bad implementation of gethostbyname (it
+dnl only looks in /etc/hosts), so we only look for -lsocket if we need
+dnl it.
+AC_CHECK_FUNCS(connect)
+if test x"$ac_cv_func_connect" = x"no"; then
+	AC_CHECK_LIB_EXT(nsl_s, SOCKET_LIBS, connect)
+	AC_CHECK_LIB_EXT(nsl, SOCKET_LIBS, connect)
+	AC_CHECK_LIB_EXT(socket, SOCKET_LIBS, connect)
+	AC_CHECK_LIB_EXT(inet, SOCKET_LIBS, connect)
+	dnl We can't just call AC_CHECK_FUNCS(connect) here,
+	dnl because the value has been cached.
+	if test x"$ac_cv_lib_ext_nsl_s_connect" = x"yes" ||
+		test x"$ac_cv_lib_ext_nsl_connect" = x"yes" ||
+		test x"$ac_cv_lib_ext_socket_connect" = x"yes" ||
+		test x"$ac_cv_lib_ext_inet_connect" = x"yes"
+	then
+		AC_DEFINE(HAVE_CONNECT,1,[Whether the system has connect()])
+	fi
+fi
+
+AC_CHECK_FUNCS(gethostbyname)
+if test x"$ac_cv_func_gethostbyname" = x"no"; then
+	AC_CHECK_LIB_EXT(nsl_s, NSL_LIBS, gethostbyname)
+	AC_CHECK_LIB_EXT(nsl, NSL_LIBS, gethostbyname)
+	AC_CHECK_LIB_EXT(socket, NSL_LIBS, gethostbyname)
+	dnl We can't just call AC_CHECK_FUNCS(gethostbyname) here,
+	dnl because the value has been cached.
+	if test x"$ac_cv_lib_ext_nsl_s_gethostbyname" = x"yes" ||
+		test x"$ac_cv_lib_ext_nsl_gethostbyname" = x"yes" ||
+		test x"$ac_cv_lib_ext_socket_gethostbyname" = x"yes"
+	then
+		AC_DEFINE(HAVE_GETHOSTBYNAME,1,
+			  [Whether the system has gethostbyname()])
+	fi
+fi
+

source/lib/replace/system/network.h

@@ -103,6 +103,16 @@ int rep_inet_pton(int af, const char *src, void *dst);
 const char *rep_inet_ntop(int af, const void *src, char *dst, socklen_t size);
 #endif
 
+#ifndef HAVE_CONNECT
+/* define is in "replace.h" */
+int rep_connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
+#endif
+
+#ifndef HAVE_GETHOSTBYNAME
+/* define is in "replace.h" */
+struct hostent *rep_gethostbyname(const char *name);
+#endif
+
 #ifdef HAVE_IFADDRS_H
 #include <ifaddrs.h>
 #endif