Add an unittest for if_nameindex to network kit tests pool

src/tests/kits/net/Jamfile

@@ -19,6 +19,8 @@ SimpleTest link_echo : link_echo.cpp : $(TARGET_NETWORK_LIBS) bnetapi be ;
 
 SimpleTest getpeername : getpeername.cpp : $(TARGET_NETWORK_LIBS) ;
 
+SimpleTest if_nameindex : if_nameindex.c : $(TARGET_NETWORK_LIBS) ;
+
 SimpleTest tcp_connection_test : tcp_connection_test.cpp
 	: $(TARGET_NETWORK_LIBS) ;
 

src/tests/kits/net/if_nameindex.c

@@ -0,0 +1,17 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <net/if.h>
+
+int main(int argc, char *argv[])
+{
+  struct if_nameindex *ifs;
+  int i;
+
+  ifs = if_nameindex();
+  if (ifs == NULL) { perror("if_nameindex"); exit(EXIT_FAILURE); }
+
+  for (i = 0; ifs[i].if_index != 0 || ifs[i].if_name != NULL; i++) {
+    printf("%d %s\n", ifs[i].if_index, ifs[i].if_name);
+  }
+  return EXIT_SUCCESS;
+}