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-rw-r--r--lib/if.c69
1 files changed, 58 insertions, 11 deletions
diff --git a/lib/if.c b/lib/if.c
index f003754a..30de6805 100644
--- a/lib/if.c
+++ b/lib/if.c
@@ -1,3 +1,4 @@
+
/*
* Interface functions.
* Copyright (C) 1997, 98 Kunihiro Ishiguro
@@ -46,6 +47,52 @@ struct if_master
int (*if_delete_hook) (struct interface *);
} if_master;
+/* Compare interface names */
+int
+if_cmp_func (struct interface *ifp1, struct interface *ifp2)
+{
+ unsigned int l1, l2;
+ long int x1, x2;
+ char *p1, *p2;
+ int res;
+
+ p1 = ifp1->name;
+ p2 = ifp2->name;
+
+ while (1) {
+ /* look up to any number */
+ l1 = strcspn(p1, "0123456789");
+ l2 = strcspn(p2, "0123456789");
+
+ /* name lengths are different -> compare names */
+ if (l1 != l2)
+ return (strcmp(p1, p2));
+
+ res = strncmp(p1, p2, l1);
+
+ /* names are different -> compare them */
+ if (res)
+ return res;
+
+ /* with identical name part, go to numeric part */
+
+ p1 += l1;
+ p2 += l1;
+
+ x1 = strtol(p1, &p1, 10);
+ x2 = strtol(p2, &p2, 10);
+
+ /* let's compare numbers now */
+ if (x1 < x2)
+ return -1;
+ if (x1 > x2)
+ return 1;
+
+ /* numbers were equal, lets do it again..
+ (it happens with name like "eth123.456:789") */
+ }
+}
+
/* Create new interface structure. */
struct interface *
if_new ()
@@ -58,13 +105,17 @@ if_new ()
}
struct interface *
-if_create ()
+if_create (char *name, int namelen)
{
struct interface *ifp;
ifp = if_new ();
- listnode_add (iflist, ifp);
+ assert (name);
+ assert (namelen <= (INTERFACE_NAMSIZ + 1));
+ strncpy (ifp->name, name, namelen);
+ ifp->name[INTERFACE_NAMSIZ] = '\0';
+ listnode_add_sort (iflist, ifp);
ifp->connected = list_new ();
ifp->connected->del = (void (*) (void *)) connected_free;
@@ -248,10 +299,7 @@ if_get_by_name (char *name)
ifp = if_lookup_by_name (name);
if (ifp == NULL)
- {
- ifp = if_create ();
- strncpy (ifp->name, name, IFNAMSIZ);
- }
+ ifp = if_create (name, INTERFACE_NAMSIZ);
return ifp;
}
@@ -430,10 +478,7 @@ DEFUN (interface,
ifp = if_lookup_by_name (argv[0]);
if (ifp == NULL)
- {
- ifp = if_create ();
- strncpy (ifp->name, argv[0], INTERFACE_NAMSIZ);
- }
+ ifp = if_create (argv[0], INTERFACE_NAMSIZ);
vty->index = ifp;
vty->node = INTERFACE_NODE;
@@ -803,8 +848,10 @@ if_init ()
iflist = list_new ();
ifaddr_ipv4_table = route_table_init ();
- if (iflist)
+ if (iflist) {
+ iflist->cmp = (int (*)(void *, void *))if_cmp_func;
return;
+ }
memset (&if_master, 0, sizeof if_master);
}