c++ 获取ip与mac对应关系
时间: 2024-01-09 22:03:43 浏览: 61
在C++中,获取IP与MAC对应关系需要使用操作系统提供的网络编程接口。下面是一个使用C++获取IP与MAC对应关系的示例代码:
```cpp
#include <iostream>
#include <string>
#include <cstring>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
std::string getMacAddress(const std::string& interface) {
int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == -1) {
std::cerr << "Failed to create socket" << std::endl;
return "";
}
struct ifreq ifr;
std::memset(&ifr, 0, sizeof(ifr));
std::strcpy(ifr.ifr_name, interface.c_str());
if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
std::cerr << "Failed to get MAC address" << std::endl;
close(sockfd);
return "";
}
close(sockfd);
unsigned char macAddress[6];
std::memcpy(macAddress, ifr.ifr_hwaddr.sa_data, sizeof(macAddress));
std::string macStr;
char buf[3];
for (int i = 0; i < 6; ++i) {
std::sprintf(buf, "%02X", macAddress[i]);
macStr += std::string(buf);
if (i != 5)
macStr += ":";
}
return macStr;
}
std::string getIPAddress(const std::string& interface) {
int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == -1) {
std::cerr << "Failed to create socket" << std::endl;
return "";
}
struct ifreq ifr;
std::memset(&ifr, 0, sizeof(ifr));
std::strcpy(ifr.ifr_name, interface.c_str());
if (ioctl(sockfd, SIOCGIFADDR, &ifr) == -1) {
std::cerr << "Failed to get IP address" << std::endl;
close(sockfd);
return "";
}
close(sockfd);
struct sockaddr_in* addr = reinterpret_cast<struct sockaddr_in*>(&ifr.ifr_addr);
std::string ip = inet_ntoa(addr->sin_addr);
return ip;
}
int main() {
std::string interface = "eth0"; // 替换为你的网络接口名
std::string macAddress = getMacAddress(interface);
if (!macAddress.empty()) {
std::cout << "MAC address: " << macAddress << std::endl;
}
std::string ipAddress = getIPAddress(interface);
if (!ipAddress.empty()) {
std::cout << "IP address: " << ipAddress << std::endl;
}
return 0;
}
```
请注意,上述代码使用了Linux平台的系统调用和网络编程接口。在其他操作系统上,获取IP与MAC对应关系的方法可能会有所不同。
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