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| #include <iostream> #define HAVE_REMOTE #include <pcap.h> #include <windows.h> #include <WinSock2.h> #pragma comment(lib,"ws2_32") using namespace std;
void packet_handler(u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data); #define Ethernet_IPv4 0x0800 #define Ethernet_ARP 0x0806
struct EthernetHeader { BYTE byDestMac[6]; BYTE bySrcMac[6]; USHORT usType; };
struct TCPHeader { USHORT m_sSourPort; USHORT m_sDestPort; ULONG m_uiSequNum; ULONG m_uiAcknowledgeNum; USHORT m_sHeaderLenAndFlag; USHORT m_sWindowSize; USHORT m_sCheckSum; USHORT m_surgentPointer; };
struct ARPHeader { USHORT usHardwareType; USHORT ProtocolType; BYTE byHardwareSize; BYTE byProtocolSize; BYTE byOpcode; BYTE bySenderMAC[6]; DWORD dwSenderIPaddress; BYTE byTargetMAC[6]; DWORD dwTargetIPaddress; };
typedef struct _IPAddress { u_char byte1; u_char byte2; u_char byte3; u_char byte4; } IPAddress;
typedef struct _IPHeader { BYTE m_byVerHLen; BYTE m_byTOS; USHORT m_usTotalLen; USHORT m_usID; USHORT m_usFlagFragOffset; BYTE m_byTTL; BYTE m_byProtocol; USHORT m_usHChecksum; DWORD m_ulSrcIP; DWORD m_ulDestIP; }IPHeader;
typedef struct _IPHeader2 { BYTE m_byVerHLen; BYTE m_byTOS; USHORT m_usTotalLen; USHORT m_usID; USHORT m_usFlagFragOffset; BYTE m_byTTL; BYTE m_byProtocol; USHORT m_usHChecksum; IPAddress m_ulSrcIP; IPAddress m_ulDestIP; }IPHeader2;
typedef struct _UDPHeader { USHORT src_port; USHORT dest_port; USHORT datalen; USHORT checksum; } UDPHeader;
struct ICMPHeader { BYTE m_byType; BYTE m_byCode; USHORT m_usChecksum; USHORT m_usID; USHORT m_usSeq; ULONG m_ulTimeStamp; }; int main() { pcap_if_t *alldevs; pcap_if_t *d; char errorbuff[PCAP_ERRBUF_SIZE]; printf("Winpcap lib version:\n%s \n", pcap_lib_version()); if (pcap_findalldevs( &alldevs, errorbuff) == PCAP_ERROR) { printf("error.."); } int index = 0; char Name[256] = { 0 }; u_int ulNetMask; for (d=alldevs ;d!=NULL;d=d->next) { if (index==1) { for (pcap_addr_t *tmp = d->addresses, *t = NULL;tmp != t;tmp = tmp->next) { ulNetMask = ((sockaddr_in*)(tmp->netmask))->sin_addr.S_un.S_addr; printf("NetMask: %s\n", inet_ntoa(((sockaddr_in*)(tmp->netmask))->sin_addr)); printf("%d\n", ulNetMask); } strcpy(Name, d->name); } printf("description:%s\n", d->description); printf("name:%s\n", d->name);
for (pcap_addr_t *tmp = d->addresses, *t=NULL;tmp != t;tmp = tmp->next) { if (tmp->addr->sa_family == AF_INET) { if (tmp->addr) { printf("address:%s\n", inet_ntoa(((sockaddr_in*)tmp->addr)->sin_addr)); } } } printf("————————————————————\n"); index++; } pcap_t *adHande = pcap_open(Name, 65536, PCAP_OPENFLAG_PROMISCUOUS, 1000, NULL, errorbuff); if (adHande!=NULL) { if (pcap_datalink(adHande)==DLT_IEEE802) { printf("DLT_IEEE802\n"); } if (pcap_datalink(adHande) == DLT_EN10MB) { printf("DLT_EN10MB\n"); } if (pcap_datalink(adHande) != DLT_EN10MB) { pcap_freealldevs(alldevs); } ulNetMask = 0xffffffff; bpf_program bpf_pro = { 0 }; if (pcap_compile(adHande, &bpf_pro, "tcp or ip or icmp or arp", 1, ulNetMask) < 0) { printf("----------->error:pcap_compile\n"); pcap_freealldevs(alldevs); return 0; } if (pcap_setfilter(adHande, &bpf_pro) < 0) { printf("----------->error:pcap_setfilter\n"); pcap_freealldevs(alldevs); return 0; } pcap_loop(adHande, 0, packet_handler, NULL); pcap_freealldevs(alldevs); pcap_freecode(&bpf_pro);。 pcap_close(adHande); } return 0; }
void packet_handler(u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data) { int j; EthernetHeader *ethernet = (EthernetHeader*)pkt_data; printf("Source MAC:"); for (j=0;j<6;j++) { if (j==5) printf("%2x", ethernet->bySrcMac[j]); else printf("%2x:", ethernet->bySrcMac[j]); } printf("\t"); printf("Dest MAC:"); for (j = 0;j < 6;j++) { if (j == 5) printf("%2x", ethernet->byDestMac[j]); else printf("%2x:", ethernet->byDestMac[j]); } printf("\n"); IPHeader2* iphdr = (IPHeader2*)(pkt_data + sizeof(EthernetHeader)); IPHeader* iphdr0 = (IPHeader*)(pkt_data + sizeof(EthernetHeader)); printf("%d.%d.%d.%d\t%d.%d.%d.%d\n", iphdr->m_ulSrcIP.byte1, iphdr->m_ulSrcIP.byte2, iphdr->m_ulSrcIP.byte3, iphdr->m_ulSrcIP.byte4, iphdr->m_ulDestIP.byte1, iphdr->m_ulDestIP.byte2, iphdr->m_ulDestIP.byte3, iphdr->m_ulDestIP.byte4 ); printf("%d.%05d\tlen:%d\n",header->ts.tv_sec, header->ts.tv_usec, header->len); if (iphdr->m_byProtocol==IPPROTO_ICMP) { ICMPHeader*icmphdr = (ICMPHeader*)(pkt_data + 14 + sizeof(IPHeader)); printf("Type:%d\t%d\n", icmphdr->m_byType, icmphdr->m_ulTimeStamp); char data[100] = { 0 }; memcpy(data, ((char*)icmphdr) + sizeof(ICMPHeader), 50); data[strlen(data) - 1] = '\0'; printf("Data:%s\n", data); } }
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