[cpp]
#include ??
#include ??
#include ??
#include ??
#include ??
?
int main(){?
??? char *net_dev;?
??? char *ip_addr;?
??? char *net_mask;?
??? char errbuf[PCAP_ERRBUF_SIZE];?
?
??? bpf_u_int32 netp;?
??? bpf_u_int32 mask;?
??? struct in_addr addr;?
?
??? net_dev = pcap_lookupdev(errbuf);?
??? if(net_dev == NULL){?
??????? printf("cannot get? the network device info: %s\n", errbuf);?
??????? return 1;?
??? }?
?????
??? printf("the network device is : %s\n", net_dev);?
??? if(pcap_lookupnet("any", &netp, &mask, errbuf) == -1){?
??????? printf("error\n");?
??????? return 1;?
??? }????
?????
??? addr.s_addr = netp;?
??? ip_addr = inet_ntoa(addr);?
?
??? if(ip_addr == NULL){?
??????? printf("inet_ntoa()\n");?
??????? return 1;?
??? }?
?
??? printf("ip is %s\n", ip_addr);?
?
??? addr.s_addr = mask;?
??? net_mask = inet_ntoa(addr);?
??? if(net_mask == NULL){?
??????? perror("inet_ntoa();\n");?
??????? return 1;?
??? }?
?????
??? printf("mask is %s\n", net_mask);?
?
??? return 0;?
}?
#include
#include
#include
#include
#include
int main(){
?char *net_dev;
?char *ip_addr;
?char *net_mask;
?char errbuf[PCAP_ERRBUF_SIZE];
?bpf_u_int32 netp;
?bpf_u_int32 mask;
?struct in_addr addr;
?net_dev = pcap_lookupdev(errbuf);
?if(net_dev == NULL){
??printf("cannot get? the network device info: %s\n", errbuf);
??return 1;
?}
?
?printf("the network device is : %s\n", net_dev);
?if(pcap_lookupnet("any", &netp, &mask, errbuf) == -1){
??printf("error\n");
??return 1;
?}?
?
?addr.s_addr = netp;
?ip_addr = inet_ntoa(addr);
?if(ip_addr == NULL){
??printf("inet_ntoa()\n");
??return 1;
?}
?printf("ip is %s\n", ip_addr);
?addr.s_addr = mask;
?net_mask = inet_ntoa(addr);
?if(net_mask == NULL){
??perror("inet_ntoa();\n");
??return 1;
?}
?
?printf("mask is %s\n", net_mask);
?return 0;
}
?
本程序可以自动获取电脑上面的网卡名称，然后可以得到所获取网卡的ip地址以及mask掩码。
[cpp]
#include ??
#include ??
#include ??
?
int main(){?
??? pcap_t *sniffer_des;?
??? char errbuf[PCAP_ERRBUF_SIZE];?
??? char *net_dev;?
??? bpf_u_int32 net, mask;?
??? struct bpf_program fp;?
??? const u_char *packet;?
??? struct pcap_pkthdr hdr;?
??? struct ether_header *eth_header;?
??? u_char *ptr;?
?
??? char filter[] = "port 80";?
?
??? net_dev = pcap_lookupdev(errbuf);?
??? if(net_dev == NULL){?
??????? printf("get device error:%s\n", errbuf);?
??????? return 1;?
??? }?
??? net_dev = "p3p1";?
??? if(pcap_lookupnet(net_dev, &net, &mask, errbuf) == -1){?
??????? printf("get net error:%s\n", errbuf);?
??????? return 1;?
??? }?
?
??? sniffer_des = pcap_open_live(net_dev, 65535, 1, 5000, errbuf);?
??? if(sniffer_des == NULL){?
??????? printf("pcap_open_live%s\n", errbuf);?
??????? return 1;?
??? }?
?
??? if(pcap_compile(sniffer_des, &fp, filter, 0, mask) == -1){?
??????? printf("pcap_compile error\n");?
??????? return 1;?
??? }?
?
??? if(pcap_setfilter(sniffer_des, &fp) == -1){?
??????? printf("pcap_setfilter() error\n");?
??????? return 1;?
??? }?
?
??? packet = pcap_next(sniffer_des, &hdr);?
??? if(packet == NULL){?
??????? printf("pacap_next() failed\n");?
??????? return 1;?
??? }?
?
??? printf("Packet length %d\n", hdr.len);?
??? printf("Sniffer time: %s\n", ctime((const time_t*)&hdr.ts.tv_sec));?
??? printf("length of portion present: %d\n", hdr.caplen);?
?
??? eth_header = (struct ether_header*)packet;?
??? if(ntohs(eth_header->ether_type) != ETHERTYPE_IP){?
??????? printf("not ethernet packet\n");?
??????? return 1;?
??? }?
?
??? ptr = eth_header->ether_dhost;?
?