我使用以下代码打印所有接口及其mac地址
- ( void )interfaceInfo{
int mib[6];
size_t len;
char *buf;
unsigned char *ptr;
struct if_msghdr *ifm;
struct sockaddr_dl *sdl;
mib[0] = CTL_NET;
mib[1] = AF_ROUTE;
mib[2] = 0;
mib[3] = AF_LINK;
mib[4] = NET_RT_IFLIST;
char name[128];
memset(name, 0, sizeof(name));
for (int i=1; i<20; i ++) {
if (if_indextoname(i, name)) {
printf("%s ",name);
}else{
continue;
}
if ((mib[5] = if_nametoindex(name)) == 0) {
printf("Error: if_nametoindex error\n");
return NULL;
}
if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
printf("Error: sysctl, take 1\n");
return NULL;
}
if ((buf = malloc(len)) == NULL) {
printf("Could not allocate memory. error!\n");
return NULL;
}
if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
printf("Error: sysctl, take 2");
free(buf);
return NULL;
}
ifm = (struct if_msghdr *)buf;
sdl = (struct sockaddr_dl *)(ifm + 1);
ptr = (unsigned char *)LLADDR(sdl);
NSString *macString = [NSString stringWithFormat:@"%02X:%02X:%02X:%02X:%02X:%02X",
*ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];
printf(" %s\n",[macString cStringUsingEncoding:NSUTF8StringEncoding]);
free(buf);
}
return nil;
}
我在 iPhone 5 上运行代码,输出为
lo0 00:00:00:00:00:00
pdp_ip0 00:00:00:00:00:00
pdp_ip1 00:00:00:00:00:00
pdp_ip2 00:00:00:00:00:00
pdp_ip3 00:00:00:00:00:00
ap1 EA:8D:28:44:32:2F
en0 E8:8D:28:44:32:2F
en1 EA:8D:28:44:32:31
awdl0 4A:79:85:44:5B:4D
//I faked parts data
我想知道pdp_ip是什么?什么是ap1,en1?
我发现en0是wifi硬件mac地址
ap1 和 en1 是虚拟接口吗?
谢谢!