Interfaces

• Name-to-index

  • unsigned int if_nametoindex(const char *name);

• Index-to-name

  • char ifname[IF_NAMESIZE];
  • char *if_indextoname(unsigned int ifindex, char *ifname);

• All interfaces names and indexes

  • struct if_nameindex *if_nameindex(void);
  • where

• struct if_nameindex {

• unsigned int if_index; /* 1, 2, ... */

• char *if_name; /* null terminated name: "lo", ... */

• };

• Free memory

  • void struct if_freenameindex(struct if_nameindex *ptr)
  • Free the dynamic memory allocated by if_nameindex()

Notes: