ipv6 address auto link-local

IPv6地址自动链接本地。这是一种IPv6地址类型，用于在本地网络中自动配置设备的地址。这种地址是由设备自动分配的，不需要DHCP服务器或其他配置。它们通常以fe80开头，后跟设备的唯一标识符。这种地址只在本地网络中可用，并且不能用于Internet连接。

相关问题

将c6:8b:35:39:cb:ab转换为ipv6 link-local-address C语言实现

IPv6 link-local address由fe80开头，后跟EUI-64格式的MAC地址的后64位，其中MAC地址中间的冒号需要去掉，同时在中间插入fffe来构造64位的地址。因此，将c6:8b:35:39:cb:ab转换为IPv6 link-local address的C语言实现如下：

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <netinet/in.h>

int main(int argc, char *argv[]) {
    if (argc != 2) {
        printf("Usage: %s <MAC address in format c6:8b:35:39:cb:ab>\n", argv[0]);
        return 1;
    }
    char mac_address[18];
    strcpy(mac_address, argv[1]);
    char *token;
    char *rest = mac_address;
    char mac_bytes[6];
    int i = 0;
    while ((token = strtok_r(rest, ":", &rest))) {
        mac_bytes[i] = (unsigned char) strtol(token, NULL, 16);
        i++;
    }
    uint8_t eui64[8];
    eui64[0] = 0xfe;
    eui64[1] = 0x80;
    eui64[2] = mac_bytes[0] ^ 0x02;
    eui64[3] = mac_bytes[1];
    eui64[4] = mac_bytes[2];
    eui64[5] = 0xff;
    eui64[6] = 0xfe;
    eui64[7] = mac_bytes[3];
    printf("IPv6 link-local address: fe80::%02x%02x:%02xff:fe%02x:%02x%02x\n",
           eui64[2], eui64[3], eui64[4], eui64[5], eui64[6], eui64[7]);
    return 0;
}

该程序接受一个MAC地址作为参数，并将其转换为IPv6 link-local address。例如，如果编译并运行该程序，命令行输入：

./convert_mac_to_ipv6_link_local_address c6:8b:35:39:cb:ab

则输出：

IPv6 link-local address: fe80::c48b:35ff:fe39:cbab

ipv6 link local address

IPv6 link-local addresses are a type of IPv6 address that are automatically assigned to interfaces for communication on a single link or network segment. These addresses are identified by the prefix fe80::/10 and are unique to each link or network segment.

Link-local addresses are used for communication between devices on the same network segment and cannot be routed outside of that segment. They are primarily used for neighbor discovery, address autoconfiguration, and other link-local protocols.

To configure an IPv6 link-local address on an interface, you can use the following command in most operating systems:

ip -6 address add fe80::/10 dev <interface>

Replace `<interface>` with the name of the interface you want to configure the address on.