如何在 C 程序中从 linux 中的 IPv6 地址获取网络接口名称？

Question

我想从 Linux 中的 C 程序中属于该接口的 IPv6 地址获取网络接口名称（如 ens33、ens37 等）。怎么做？请帮忙。

Answer 1

您可以使用getifaddrs (Linux getting all network interface names) 获取网络接口列表

以下来自getifaddrs的手册页

   The  getifaddrs() function creates a linked list of structures describing the network interfaces of the local system, and stores the address
   of the first item of the list in *ifap.  The list consists of ifaddrs structures, defined as follows:

       struct ifaddrs {
           struct ifaddrs  *ifa_next;    /* Next item in list */
           char            *ifa_name;    /* Name of interface */
           unsigned int     ifa_flags;   /* Flags from SIOCGIFFLAGS */
           struct sockaddr *ifa_addr;    /* Address of interface */
           struct sockaddr *ifa_netmask; /* Netmask of interface */
           union {
               struct sockaddr *ifu_broadaddr;
                                /* Broadcast address of interface */
               struct sockaddr *ifu_dstaddr;
                                /* Point-to-point destination address */
           } ifa_ifu;
       #define              ifa_broadaddr ifa_ifu.ifu_broadaddr
       #define              ifa_dstaddr   ifa_ifu.ifu_dstaddr
           void            *ifa_data;    /* Address-specific data */
       };

反之，只需搜索列表。