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struct nl_cache* rtnl_class_alloc_cache ( struct nl_handle *  handle,
int  ifindex 
) [read]

Build a class cache including all classes attached to the specified interface

  • handle netlink handle
  • ifindex interface index of the link the classes are attached to.
Allocates a new cache, initializes it properly and updates it to include all classes attached to the specified interface.

The caller is responsible for destroying and freeing the cache after using it. (nl_cache_destroy_and_free())
The cache or NULL if an error has occured.

Definition at line 365 of file class.c.

References nl_cache_alloc_from_ops(), nl_cache_destroy_and_free(), and nl_cache_update().

      struct nl_cache * cache;
      cache = nl_cache_alloc_from_ops(&rtnl_class_ops);
      if (!cache)
            return NULL;

      cache->c_iarg1 = ifindex;
      if (nl_cache_update(handle, cache) < 0) {
            return NULL;

      return cache;

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