我有一些代码似乎可以做你想做的事。
我一直在尝试获取一些 C++ 代码，这些代码将从我网络上的远程计算机获取 MAC 地址。花了相当长的时间才弄清楚这一点。我设法将几个示例合并并修改为一个工作演示。修改它以使用 Socket 连接应该很容易。
这段代码将网络设备和 IP 地址作为参数。（例如 eth0 192.168.1.1）
程序将检查 IP 的正确性，然后 ping IP 地址以将其添加到 ARP 表中，然后从 ARP 表中提取 MAC 地址，然后显示 MAC 地址。
我不是 C++ 编码员（或者至少我是新手），所以代码可能会被刷新。
此代码仅在 Raspbian 上测试过！
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if_arp.h>
#include <arpa/inet.h>
#include <sstream>
bool isValidIpAddress(char *ipAddress) {
int result = 0;
struct sockaddr_in sa;
result = inet_pton(AF_INET, ipAddress, &(sa.sin_addr));
return result;
}
/**
* @brief Convert String to Number
*/
template <typename TP>
TP str2num( std::string const& value ){
std::stringstream sin;
sin << value;
TP output;
sin >> output;
return output;
}
/**
* @brief Convert number to string
*/
template <typename TP>
std::string num2str( TP const& value ){
std::stringstream sin;
sin << value;
return sin.str();
}
/**
* @brief Execute Generic Shell Command
*
* @param[in] command Command to execute.
* @param[out] output Shell output.
* @param[in] mode read/write access
*
* @return 0 for success, 1 otherwise.
*
*/
int Execute_Command( const std::string& command,
std::string& output,
const std::string& mode = "r") {
// Create the stringstream
std::stringstream sout;
// Run Popen
FILE *in;
char buff[512];
// Test output
if(!(in = popen(command.c_str(), mode.c_str()))){
return 1;
}
// Parse output
while(fgets(buff, sizeof(buff), in)!=NULL){
sout << buff;
}
// Close
int exit_code = pclose(in);
// set output
output = sout.str();
// Return exit code
return exit_code;
}
/**
* @brief Ping
*
* @param[in] address Address to ping.
* @param[in] max_attempts Number of attempts to try and ping.
* @param[out] details Details of failure if one occurs.
*
* @return True if responsive, false otherwise.
*
* @note { I am redirecting stderr to stdout. I would recommend
* capturing this information separately.}
*/
bool Ping( const std::string& address ) {
// Format a command string
std::string command = "ping -c " + num2str(2) + " " + address + " 2>&1";
std::string output;
std::string details;
// Execute the ping command
int code = Execute_Command( command, details );
return (code == 0);
}
static char *ethernet_mactoa(struct sockaddr *addr) {
static char buff[256];
unsigned char *ptr = (unsigned char *) addr->sa_data;
sprintf(buff, "%02X:%02X:%02X:%02X:%02X:%02X",
(ptr[0] & 0xff), (ptr[1] & 0xff), (ptr[2] & 0xff),
(ptr[3] & 0xff), (ptr[4] & 0xff), (ptr[5] & 0xff));
return (buff);
}
int main(int argc, char *argv[]) {
int s;
struct arpreq areq;
struct sockaddr_in *sin;
struct in_addr ipaddr;
if (argc != 3) {
fprintf(stderr, "-- Usage: %s device ipaddress\n", argv[0]);
exit(1);
}
/* Get an internet domain socket. */
if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
perror("socket");
exit(1);
}
if (!isValidIpAddress(argv[2])) {
fprintf(stderr, "-- Error: invalid IP Address '%s'.\n",
argv[2]);
exit(1);
}
if (inet_aton(argv[2], &ipaddr) == 0) {
fprintf(stderr, "-- Error: bad dotted-decimal IP '%s'.\n",
argv[2]);
exit(1);
}
/* Ping the Address for ARP table listing */
if ( !Ping(argv[2]) ) {
fprintf(stderr, "-- Error: unable to ping IP '%s'.\n",
argv[2]);
exit(1);
}
/* Make the ARP request. */
memset(&areq, 0, sizeof(areq));
sin = (struct sockaddr_in *) &areq.arp_pa;
sin->sin_family = AF_INET;
sin->sin_addr = ipaddr;
sin = (struct sockaddr_in *) &areq.arp_ha;
sin->sin_family = ARPHRD_ETHER;
strncpy(areq.arp_dev, argv[1], 15);
if (ioctl(s, SIOCGARP, (caddr_t) &areq) == -1) {
perror("-- Error: unable to make ARP request, error");
exit(1);
}
printf("%s -> %s\n",
inet_ntoa(((struct sockaddr_in *) &areq.arp_pa)->sin_addr),
ethernet_mactoa(&areq.arp_ha));
return 0;
}