Added option to disable pcap build

src/CMakeLists.txt

@@ -40,6 +40,9 @@ set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} --std=c++2a")
 # With this flag we can enable GoBGP build via console: cmake .. -DENABLE_GOBGP_SUPPORT=ON
 option(ENABLE_GOBGP_SUPPORT "Enable GoBGP support build" ON)
 
+# It can be disabled this way: cmake .. -DENABLE_PCAP_SUPPORT=OFF
+option(ENABLE_PCAP_SUPPORT "Enable PCAP support" ON)
+
 # On some platforms like Fedora we need to explicitly link with libabseil / libabsl.
 # We do not use it directly but gRPC uses it for libgpr and we need to link with absl explicitly to avoid linker errors like this:
 # libgpr.so: undefined reference to symbol '_ZN4absl12lts_202103245Mutex4LockEv'
@@ -462,6 +465,10 @@ if (LINK_WITH_ABSL)
     # TODO: check that we actually found it. Otherwise trigger fatal erorr
 endif()
 
+if (ENABLE_PCAP_SUPPORT)
+    add_definitions(-DENABLE_PCAP)
+endif()
+
 if (ENABLE_GOBGP_SUPPORT)
     add_definitions(-DENABLE_GOBGP)
     add_library(gobgp_action STATIC actions/gobgp_action.cpp)

src/fastnetmon.cpp

@@ -54,7 +54,11 @@
 
 // Plugins
 #include "netflow_plugin/netflow_collector.hpp"
+
+#ifdef ENABLE_PCAP
 #include "pcap_plugin/pcap_collector.hpp"
+#endif
+
 #include "sflow_plugin/sflow_collector.hpp"
 
 #ifdef NETMAP_PLUGIN
@@ -1885,9 +1889,11 @@ int main(int argc, char** argv) {
         packet_capture_plugin_thread_group.add_thread(new boost::thread(start_netflow_collection, process_packet));
     }
 
+#ifdef ENABLE_PCAP
     if (enable_pcap_collection) {
         packet_capture_plugin_thread_group.add_thread(new boost::thread(start_pcap_collection, process_packet));
     }
+#endif
 
     // Wait for all threads in capture thread group
     packet_capture_plugin_thread_group.join_all();

src/fastnetmon_logic.cpp

@@ -20,7 +20,11 @@
 
 // Plugins
 #include "netflow_plugin/netflow_collector.hpp"
+
+#ifdef ENABLE_PCAP
 #include "pcap_plugin/pcap_collector.hpp"
+#endif
+
 #include "sflow_plugin/sflow_collector.hpp"
 
 #ifdef NETMAP_PLUGIN

src/pcap_plugin/pcap_collector.hpp

@@ -1,5 +1,4 @@
-#ifndef PCAP_PLUGIN_H
-#define PCAP_PLUGIN_H
+#pragma once
 
 #include "../fastnetmon_types.hpp"
 #include <iostream>
@@ -7,5 +6,3 @@
 void start_pcap_collection(process_packet_pointer func_ptr);
 void stop_pcap_collection();
 std::string get_pcap_stats();
-
-#endif

src/plugin_runner.cpp

@@ -14,7 +14,11 @@
 #include "fastnetmon_types.h"
 #include "libpatricia/patricia.hpp"
 #include "netflow_plugin/netflow_collector.h"
+
+#ifdef ENABLE_PCAP
 #include "pcap_plugin/pcap_collector.h"
+#endif
+
 #include "sflow_plugin/sflow_collector.h"
 
 #ifdef FASTNETMON_ENABLE_AFPACKET