Reduce CPU usage when waiting for packet arrives

set pcap timeout to 1ms
xfangfang · May 14, 2024 · fce12fe · fce12fe
1 parent bd43849
commit fce12fe
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/exploit.cpp b/src/exploit.cpp
@@ -94,7 +94,7 @@ LcpEchoHandler::LcpEchoHandler(const std::string &iface) {
     }
 
     if (!dev->setFilter("pppoes && !ip")) {
-        std::cerr << "[-] LcpEchoHandler cannot set bfp filter" << std::endl;
+        std::cerr << "[-] LcpEchoHandler cannot set filter" << std::endl;
     }
 }
 
@@ -179,14 +179,15 @@ int Exploit::setInterface(const std::string &iface) {
     // open the device before start capturing/sending packets
     pcpp::PcapLiveDevice::DeviceConfiguration config;
     config.direction = pcpp::PcapLiveDevice::PCPP_IN;
+    config.packetBufferTimeoutMs = 1;
     if (!dev->open(config)) {
         std::cerr << "[-] Cannot open device" << std::endl;
         dev = nullptr;
         return 1;
     }
 
     if (!dev->setFilter(BPF_FILTER)) {
-        std::cerr << "[-] Cannot set bfp filter" << std::endl;
+        std::cerr << "[-] Cannot set filter" << std::endl;
     }
     return 0;
 }