Fix bug in localIP and revert change in TR1 tuple definition (#31)

Signed-off-by: Isaac Hier <[email protected]>

Author: isaachier

CMakeLists.txt

@@ -308,7 +308,7 @@ if(BUILD_TESTING)
       src/jaegertracing/utils/UDPClientTest.cpp)
   add_executable(UnitTest ${TEST_SRC})
   target_compile_definitions(UnitTest PUBLIC
-      GTEST_HAS_TR1_TUPLE=1
+      GTEST_HAS_TR1_TUPLE=0
       GTEST_USE_OWN_TR1_TUPLE=0)
   target_link_libraries(
       UnitTest testutils GTest::main jaegertracing-static ${LIBS})

src/jaegertracing/net/IPAddress.cpp

@@ -37,7 +37,8 @@ struct IfAddrDeleter : public std::function<void(ifaddrs*)> {
 IPAddress IPAddress::localIP(int family)
 {
     return localIP([family](const ifaddrs* ifAddr) {
-        return ifAddr->ifa_addr->sa_family == family;
+        return ifAddr->ifa_addr != nullptr &&
+               ifAddr->ifa_addr->sa_family == family;
     });
 }