From: Dmitry V. Levin <ldv@altlinux.org>
Date: Tue, 8 Aug 2017 20:40:57 +0000 (+0000)
Subject: tests: add ifindex_lo function and IFINDEX_LO_STR macro to libtests
X-Git-Tag: v4.19~116
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=23d470d3c0aedac5e0aaaa5e9164cafa5b584b6d;p=strace

tests: add ifindex_lo function and IFINDEX_LO_STR macro to libtests

* tests/ifindex.c: New file.
* tests/Makefile.am (libtests_a_SOURCES): Add it.
* tests/tests.h (ifindex_lo): New prototype.
(IFINDEX_LO_STR): New macro.
---

diff --git a/tests/Makefile.am b/tests/Makefile.am
index f038226e..42a66c46 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -50,6 +50,7 @@ libtests_a_SOURCES = \
 	get_sigset_size.c \
 	hexdump_strdup.c \
 	hexquote_strndup.c \
+	ifindex.c \
 	inode_of_sockfd.c \
 	libmmsg.c \
 	libsocketcall.c \
diff --git a/tests/ifindex.c b/tests/ifindex.c
new file mode 100644
index 00000000..390a135b
--- /dev/null
+++ b/tests/ifindex.c
@@ -0,0 +1,55 @@
+/*
+ * Proxy wrappers for if_nametoindex.
+ *
+ * Copyright (c) 2017 The strace developers.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+#include "tests.h"
+
+#ifdef HAVE_IF_INDEXTONAME
+
+# include <net/if.h>
+
+unsigned int
+ifindex_lo(void)
+{
+	static unsigned int index;
+
+	if (!index)
+		index = if_nametoindex("lo");
+
+	return index;
+}
+
+#else /* !HAVE_IF_INDEXTONAME */
+
+unsigned int
+ifindex_lo(void)
+{
+	return 1;
+}
+
+#endif
diff --git a/tests/tests.h b/tests/tests.h
index 6fa2f402..d453e3e0 100644
--- a/tests/tests.h
+++ b/tests/tests.h
@@ -197,6 +197,15 @@ int create_nl_socket_ext(int proto, const char *name);
 /* Create a pipe with maximized descriptor numbers. */
 void pipe_maxfd(int pipefd[2]);
 
+/* if_nametoindex("lo") */
+unsigned int ifindex_lo(void);
+
+#ifdef HAVE_IF_INDEXTONAME
+# define IFINDEX_LO_STR "if_nametoindex(\"lo\")"
+#else
+# define IFINDEX_LO_STR "1"
+#endif
+
 #define F8ILL_KULONG_SUPPORTED	(sizeof(void *) < sizeof(kernel_ulong_t))
 #define F8ILL_KULONG_MASK	((kernel_ulong_t) 0xffffffff00000000ULL)