网络编程 UDP 改变网关和网卡名字

在程序里动态改变网关和网卡名字

1,改变网卡名字

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h> int main(){
int fd;
ifreq ifr; fd = socket(AF_INET, SOCK_DGRAM, 0); strncpy(ifr.ifr_name, "lo", IFNAMSIZ - 1);
strncpy(ifr.ifr_newname, "newloname", IFNAMSIZ - 1);
if(ioctl(fd, SIOCSIFNAME, &ifr) != 0){
perror("ioctl");
return 1;
}
close(fd);
return 0;
}

github源代码

2,改变网关

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h> int main(){
int fd;
ifreq ifr;
sockaddr_in *s_in; fd = socket(AF_INET, SOCK_DGRAM, 0); s_in = (sockaddr_in*)&ifr.ifr_addr; s_in->sin_family = AF_INET;
inet_pton(AF_INET, "255.0.0.0", &s_in->sin_addr); strncpy(ifr.ifr_name, "enp0s3", IFNAMSIZ - 1); if(ioctl(fd, SIOCSIFNETMASK, &ifr) != 0){
perror("ioctl");
return 1;
}
close(fd);
return 0;
}

github源代码

c/c++ 学习互助QQ群:877684253

c/c++  网络编程 UDP 改变网关和网卡名字-LMLPHP

本人微信:xiaoshitou5854

05-07 12:00