Add ability for compile on FreeBSD (and another non Linux systems)

CMakeLists.txt

@@ -28,8 +28,15 @@ endif()
 set(PFRING_INCLUDE_DIRS /opt/pf_ring/include)
 set(PFRING_LIBRARIES /opt/pf_ring/lib/libpfring.so)
 
-# Some defines for FastNetMon compiation tuning
-add_definitions(-DPF_RING)
+if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
+    message("You are running Linux and we can build PF_RING support")
+    # Fefines for enable PF_RING for FastNetMon compiation
+    add_definitions(-DPF_RING)
+else()
+    message("You are running not an Linux and we can't build PF_RING support")
+endif()
+
+
 
 # If you need hardware locking features
 # add_definitions(-DHWFILTER_LOCKING)

fastnetmon.cpp

@@ -1151,6 +1151,7 @@ string print_simple_packet(simple_packet packet) {
     return buffer.str();
 }
 
+#ifdef PF_RING
 void parse_packet_pf_ring(const struct pfring_pkthdr *h, const u_char *p, const u_char *user_bytes) {
     // Описание всех полей: http://www.ntop.org/pfring_api/structpkt__parsing__info.html
     simple_packet packet;
@@ -1237,6 +1238,7 @@ void parse_packet_pf_ring(const struct pfring_pkthdr *h, const u_char *p, const
     logger<<log4cpp::Priority::INFO<<buffer;
     */
 }
+#endif
 
 // We do not use this function now! It's buggy!
 void parse_packet(u_char *user, struct pcap_pkthdr *packethdr, const u_char *packetptr) {
@@ -2598,8 +2600,9 @@ unsigned int detect_attack_protocol(map_element& speed_element, direction attack
     }
 } 
 
+#define my_max_on_defines(a, b) (a > b ? a : b)
 unsigned int get_max_used_protocol(uint64_t tcp, uint64_t udp, uint64_t icmp) {
-    unsigned int max = max(max(udp, tcp), icmp);
+    unsigned int max = my_max_on_defines(my_max_on_defines(udp, tcp), icmp);
 
     if (max == tcp) {
         return IPPROTO_TCP;