diff options
Diffstat (limited to 'lib/if.h')
| -rw-r--r-- | lib/if.h | 39 |
1 files changed, 30 insertions, 9 deletions
@@ -36,10 +36,6 @@ Boston, MA 02111-1307, USA. */ #define INTERFACE_NAMSIZ 20 #define INTERFACE_HWADDR_MAX 20 -/* Internal If indexes start at 0xFFFFFFFF and go down to 1 greater - than this */ -#define IFINDEX_INTERNBASE 0x80000000 - #ifdef HAVE_PROC_NET_DEV struct if_stats { @@ -75,11 +71,19 @@ struct if_stats /* Interface structure */ struct interface { - /* Interface name. */ + /* Interface name. This should probably never be changed after the + interface is created, because the configuration info for this interface + is associated with this structure. For that reason, the interface + should also never be deleted (to avoid losing configuration info). + To delete, just set ifindex to IFINDEX_INTERNAL to indicate that the + interface does not exist in the kernel. + */ char name[INTERFACE_NAMSIZ + 1]; - /* Interface index. */ + /* Interface index (should be IFINDEX_INTERNAL for non-kernel or + deleted interfaces). */ unsigned int ifindex; +#define IFINDEX_INTERNAL 0 /* Zebra internal interface status */ u_char status; @@ -208,14 +212,22 @@ struct connected /* Prototypes. */ int if_cmp_func (struct interface *, struct interface *); -struct interface *if_new (void); struct interface *if_create (const char *name, int namelen); struct interface *if_lookup_by_index (unsigned int); struct interface *if_lookup_by_name (const char *); struct interface *if_lookup_exact_address (struct in_addr); struct interface *if_lookup_address (struct in_addr); struct interface *if_get_by_name (const char *); -void if_delete (struct interface *); + +/* Delete the interface, but do not free the structure, and leave it in the + interface list. It is often advisable to leave the pseudo interface + structure because there may be configuration information attached. */ +extern void if_delete_retain (struct interface *); + +/* Delete and free the interface structure: calls if_delete_retain and then + deletes it from the interface list and frees the structure. */ +extern void if_delete (struct interface *); + int if_is_up (struct interface *); int if_is_running (struct interface *); int if_is_operative (struct interface *); @@ -226,9 +238,18 @@ int if_is_multicast (struct interface *); void if_add_hook (int, int (*)(struct interface *)); void if_init (); void if_dump_all (); -char *ifindex2ifname (unsigned int); extern const char *if_flag_dump(unsigned long); +/* Please use ifindex2ifname instead of if_indextoname where possible; + ifindex2ifname uses internal interface info, whereas if_indextoname must + make a system call. */ +extern char *ifindex2ifname (unsigned int); + +/* Please use ifname2ifindex instead of if_nametoindex where possible; + ifname2ifindex uses internal interface info, whereas if_nametoindex must + make a system call. */ +extern unsigned int ifname2ifindex(const char *ifname); + /* Connected address functions. */ struct connected *connected_new (); void connected_free (struct connected *); |