ifr_name:字符数组,存储接口的名称。 ifr_addr:sockaddr结构体,用于存储接口的IP地址等信息。 ifr_hwaddr:sockaddr结构体,用于存储接口的MAC地址。 ifr_flags:短整型,存储网络接口的标志,如是否启用、是否支持广播等。 ifr_ifindex:整型,存储接口的索引号。 ifr_map:ifmap结构体,用于存储接口的硬件参数。查找...
#define ifr_name ifr_ifrn.ifrn_name /* interface name */ #define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */ #define ifr_addr ifr_ifru.ifru_addr /* address */ #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-p lnk */ #define ifr_broadaddr ifr_ifru.ifru_...
intset_if_flags(char*pif_name,intsock,intstaus,intset) { structifreq ifr; intret = 0; strncpy(ifr.ifr_name, pif_name, strlen(pif_name) + 1); ret = ioctl(sock, SIOCGIFFLAGS, &ifr); if(ret) return-1; /* set or clean */ if(set) ifr.ifr_flags |= status; else ifr.ifr_flags...
#define ifr_name ifr_ifrn.ifrn_name /* interface name */ #define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */ #define ifr_addr ifr_ifru.ifru_addr /* address */ #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-p lnk */ #define ifr_broadaddr ifr_ifru.ifru_...
Char ifr_name[IFNAMSIZ]; Union{ Struct sockaddr ifru_addr; Struct sockaddr ifru_dstaddr; Struct sockaddr ifru_broadaddr; Struct sockaddr ifru_netmask; Struct sockaddr ifru_hwaddr; Short ifru_flags; Int ifru_metric; Caddr_t ifru_data; ...
charifr_name[IFNAMSIZ]; 1. union { 1. structsockaddr ifru_addr; 1. structsockaddr ifru_dstaddr; 1. structsockaddr ifru_broadaddr; 1. shortifru_flags; 1. intifru_metric; 1. caddr_t ifru_data; 1. } ifr_ifru; 1. }; 1.
char ifr_name[IFNAMSIZ]; union { struct sockaddr ifru_addr; struct sockaddr ifru_dstaddr; struct sockaddr ifru_broadaddr; short ifru_flags; int ifru_metric; caddr_t ifru_data; } ifr_ifru; }; #define ifr_addr ifr_ifru.ifru_addr ...
}ifr_ifru; }; #defineifr_name ifr_ifrn.ifrn_name/* interface name */ #defineifr_hwaddr ifr_ifru.ifru_hwaddr/* MAC address */ #defineifr_addr ifr_ifru.ifru_addr/* address */ #defineifr_dstaddr ifr_ifru.ifru_dstaddr/* other end of p-p lnk */ #defineifr_broadaddr ifr_ifru....
ifr_name, ifName, sizeof(ifr.ifr_name)-1); if (ioctl(fd, SIOCGIFINDEX, &ifr) < 0) { perror("get interface index fails."); close(fd); return -1; } 编译报错: error: storage size of ‘ifr’ isn’t known 该代码拿到外部测试没有问题,这就很奇怪了。 参考 linux - 为什么C99提示存储...
strcpy(ifreq.ifr_name,sys_nic_name[i]); //把网卡名字复制到ifreq结构体中的name变量(感觉这个地方是必须的) if(ioctl(sock,SIOCGIFADDR,&ifreq)<0) { //这里涉及ioctl函数对于网络文件的控制(下面会介绍) sprintf(sys_nic_ip[i],"Not set"); } else { sprintf(sys_nic_ip[i],"%d.%d.%d.%d",...