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 f038226e8dff88c309ed97c51d56479bb889061e..42a66c465cd5988dbf9430a40ce3b05f20cd33c4 100644 (file)
--- 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 (file)
index 0000000..390a135
--- /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 6fa2f402d26d6019163bd1b6bc4b0068281f5aab..d453e3e0ae9ba7758568e067e78abbe4751926a8 100644 (file)
--- 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)