Fix compilation warnings on Windows.

CMakeLists.txt

@@ -9,8 +9,16 @@ ELSE(NOT CMAKE_BUILD_TYPE)
     MESSAGE(STATUS "Using specified '${CMAKE_BUILD_TYPE}' build type.")
 ENDIF(NOT CMAKE_BUILD_TYPE)
 
-# Default compilation settings
-SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+# Compilation flags.
+IF(MSVC)
+    # Don't always use Wall, since VC's /Wall is ridiculously verbose.
+    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W3")
+    # Disable VC secure checks, since these are not really issues.
+    ADD_DEFINITIONS("-D_CRT_SECURE_NO_WARNINGS=1")
+    ADD_DEFINITIONS("-D_SCL_SECURE_NO_WARNINGS=1")
+ELSE()
+    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+ENDIF()
 
 # Build output checks
 OPTION(LIBTINS_BUILD_SHARED "Build libtins as a shared library." ON)
@@ -152,7 +160,7 @@ ADD_SUBDIRECTORY(examples)
 IF(EXISTS "${CMAKE_SOURCE_DIR}/googletest/CMakeLists.txt")
     # Enable tests and add the test directory
     MESSAGE(STATUS "Tests have been enabled")
-    SET(gtest_force_shared_crt true)
+    SET(gtest_force_shared_crt ON CACHE BOOL "Always use /MD")
     ENABLE_TESTING()
     ADD_SUBDIRECTORY(googletest)
     ADD_SUBDIRECTORY(tests)

include/tins/utils.h

@@ -381,7 +381,6 @@ template<class ForwardIterator>
 void Tins::Utils::route_entries(ForwardIterator output) {
     MIB_IPFORWARDTABLE *table;
     ULONG size = 0;
-    char iface_name[256];
     GetIpForwardTable(0, &size, 0);
     std::vector<uint8_t> buffer(size);
     table = (MIB_IPFORWARDTABLE*)&buffer[0];

src/dhcpv6.cpp

@@ -201,7 +201,7 @@ DHCPv6::status_code_type DHCPv6::status_code() const {
 }
 
 bool DHCPv6::has_rapid_commit() const {
-    return search_option(RAPID_COMMIT);
+    return static_cast<bool>(search_option(RAPID_COMMIT));
 }
 
 DHCPv6::user_class_type DHCPv6::user_class() const {
@@ -225,7 +225,7 @@ uint8_t DHCPv6::reconfigure_msg() const {
 }
 
 bool DHCPv6::has_reconfigure_accept() const {
-    return search_option(RECONF_ACCEPT);
+    return static_cast<bool>(search_option(RECONF_ACCEPT));
 }
 
 DHCPv6::duid_type DHCPv6::client_id() const {

src/ip_reassembler.cpp

@@ -87,7 +87,7 @@ uint16_t IPv4Stream::extract_offset(const IP *ip) {
 }
 
 bool IPv4Stream::extract_more_frag(const IP *ip) {
-    return ip->frag_off() & 0x2000;
+    return (ip->frag_off() & 0x2000) != 0;
 }
 } // namespace Internals
 

src/offline_packet_filter.cpp

@@ -70,11 +70,7 @@ bool OfflinePacketFilter::matches_filter(const uint8_t* buffer,
     pcap_pkthdr header = {};
     header.len = total_sz;
     header.caplen = total_sz;
-    return pcap_offline_filter(
-        &filter,
-        &header,
-        buffer
-    );
+    return pcap_offline_filter(&filter, &header, buffer) != 0;
 }
 
 bool OfflinePacketFilter::matches_filter(PDU& pdu) const

src/packet_sender.cpp

@@ -384,7 +384,7 @@ PDU *PacketSender::recv_match_loop(const std::vector<int>& sockets, PDU &pdu, st
     #endif
     
     timeout.tv_sec  = _timeout;
-    end_time.tv_sec = time(0) + _timeout;    
+    end_time.tv_sec = static_cast<long>(time(0) + _timeout);
     end_time.tv_usec = timeout.tv_usec = _timeout_usec;
     while(true) {
         FD_ZERO(&readfds);

src/radiotap.cpp

@@ -178,7 +178,7 @@ void RadioTap::init() {
     channel(Utils::channel_to_mhz(1), 0xa0);
     flags(FCS);
     tsft(0);
-    dbm_signal(0xce);
+    dbm_signal(static_cast<int8_t>(0xce));
     rx_flags(0);
     antenna(0);
 }

src/tcp.cpp

@@ -147,7 +147,7 @@ void TCP::sack_permitted() {
 }
 
 bool TCP::has_sack_permitted() const {
-    return bool(search_option(SACK_OK));
+    return static_cast<bool>(search_option(SACK_OK));
 }
 
 void TCP::sack(const sack_type &edges) {
@@ -286,7 +286,7 @@ void TCP::write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *par
         buffer = write_option(*it, buffer);
 
     if(_options_size < _total_options_size) {
-        uint8_t padding = _options_size;
+        uint16_t padding = _options_size;
         while(padding < _total_options_size) {
             *(buffer++) = 1;
             padding++;

tests/src/dns.cpp

@@ -4,6 +4,9 @@
 #include "ipv6_address.h"
 #include "utils.h"
 
+// Really nice and unique macro names, Windows :D
+#undef IN
+
 using namespace Tins;