tristan/ip-reporter-cpp
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This commit is contained in:
Tristan Smith 2024-07-02 23:34:22 -04:00
parent 32b895afe2
commit 0f5832ac67
2 changed files with 75 additions and 2 deletions
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3
CMakeLists.txt
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@ -13,4 +13,5 @@ set(CMAKE_AUTOMOC ON)
add_executable(ip_reporter src/main.cpp) add_executable(ip_reporter src/main.cpp)
target_link_libraries(ip_reporter Qt5::Widgets Qt5::Core Qt5::Gui Qt5::Network pcap) find_package(Threads REQUIRED)
target_link_libraries(ip_reporter PRIVATE Qt5::Widgets Qt5::Core Qt5::Gui Qt5::Network Threads::Threads pcap)

74
src/main.cpp
View File

@ -20,6 +20,8 @@
#include <netinet/udp.h> #include <netinet/udp.h>
#include <arpa/inet.h> #include <arpa/inet.h>
// comment here
const char *DESTINATION_IP = "255.255.255.255"; const char *DESTINATION_IP = "255.255.255.255";
const uint16_t SOURCE_PORT = 14236; const uint16_t SOURCE_PORT = 14236;
const uint16_t DESTINATION_PORT = 14235; const uint16_t DESTINATION_PORT = 14235;
@ -211,6 +213,76 @@ void IPReporter::capture_packets()
pcap_freealldevs(alldevs); pcap_freealldevs(alldevs);
} }
// non-freebsd code
// PacketInfo IPReporter::extract_packet_info(const u_char *packet, struct pcap_pkthdr packet_header)
// {
// PacketInfo info;
// struct ether_header *eth_header;
// eth_header = (struct ether_header *)packet;
// // Check if it's an IP packet
// if (ntohs(eth_header->ether_type) != ETHERTYPE_IP)
// {
// std::cerr << "Not an IP packet" << std::endl;
// return info;
// }
// // Extract source MAC address
// char mac_addr[18];
// snprintf(mac_addr, sizeof(mac_addr), "%02x:%02x:%02x:%02x:%02x:%02x",
// eth_header->ether_shost[0],
// eth_header->ether_shost[1],
// eth_header->ether_shost[2],
// eth_header->ether_shost[3],
// eth_header->ether_shost[4],
// eth_header->ether_shost[5]);
// info.source_mac = mac_addr;
// struct ip *ip_header;
// ip_header = (struct ip *)(packet + sizeof(struct ether_header));
// // Check if the packet's destination IP matches the specified destination IP
// char ip_addr[INET_ADDRSTRLEN];
// inet_ntop(AF_INET, &(ip_header->ip_dst), ip_addr, INET_ADDRSTRLEN);
// if (strcmp(ip_addr, DESTINATION_IP) != 0)
// {
// std::cerr << "Destination IP does not match" << std::endl;
// return info;
// }
// // Check if the packet is a UDP packet
// if (ip_header->ip_p != IPPROTO_UDP)
// {
// std::cerr << "Not a UDP packet" << std::endl;
// return info;
// }
// // Extract the UDP header
// struct udphdr *udp_header;
// udp_header = (struct udphdr *)(packet + sizeof(struct ether_header) + sizeof(struct ip));
// // Check if the source and destination ports match
// if (ntohs(udp_header->source) != SOURCE_PORT || ntohs(udp_header->dest) != DESTINATION_PORT)
// {
// std::cerr << "Ports do not match" << std::endl;
// return info;
// }
// // Extract source IP address
// inet_ntop(AF_INET, &(ip_header->ip_src), ip_addr, INET_ADDRSTRLEN);
// info.source_ip = ip_addr;
// // Debug output
// std::cout << "Source IP: " << info.source_ip << std::endl;
// std::cout << "Source MAC: " << info.source_mac << std::endl;
// return info;
// }
// freebsd code
PacketInfo IPReporter::extract_packet_info(const u_char *packet, struct pcap_pkthdr packet_header) PacketInfo IPReporter::extract_packet_info(const u_char *packet, struct pcap_pkthdr packet_header)
{ {
PacketInfo info; PacketInfo info;
@ -260,7 +332,7 @@ PacketInfo IPReporter::extract_packet_info(const u_char *packet, struct pcap_pkt
udp_header = (struct udphdr *)(packet + sizeof(struct ether_header) + sizeof(struct ip)); udp_header = (struct udphdr *)(packet + sizeof(struct ether_header) + sizeof(struct ip));
// Check if the source and destination ports match // Check if the source and destination ports match
if (ntohs(udp_header->source) != SOURCE_PORT || ntohs(udp_header->dest) != DESTINATION_PORT) if (ntohs(udp_header->uh_sport) != SOURCE_PORT || ntohs(udp_header->uh_dport) != DESTINATION_PORT)
{ {
std::cerr << "Ports do not match" << std::endl; std::cerr << "Ports do not match" << std::endl;
return info; return info;