void skb_free(struct sk_buff *skb) {
ipl_t sp;
if (!skb) {
return;
}
skb_data_free(skb->data);
sp = ipl_save();
{
assert((skb->lnk.prev != NULL) && (skb->lnk.next != NULL));
list_del((struct list_head *) skb);
pool_free(&skb_pool, skb);
}
ipl_restore(sp);
}
struct sk_buff * skb_alloc_local(size_t size, struct pool *pl) {
struct sk_buff *skb;
struct sk_buff_data *skb_data;
skb_data = skb_data_alloc(size);
if (skb_data == NULL) {
return NULL; /* error: no memory */
}
skb = skb_wrap_local(size, skb_data, pl);
if (skb == NULL) {
skb_data_free(skb_data);
return NULL; /* error: no memory */
}
return skb;
}
struct sk_buff * skb_clone(const struct sk_buff *skb) {
struct sk_buff *cloned;
struct sk_buff_data *cloned_data;
assert(skb != NULL);
cloned_data = skb_data_clone(skb->data);
if (cloned_data == NULL) {
return NULL; /* error: no memory */
}
cloned = skb_wrap(skb->len, cloned_data);
if (cloned == NULL) {
skb_data_free(cloned_data);
return NULL; /* error: no memory */
}
skb_copy_ref(cloned, skb);
return cloned;
}
struct sk_buff * skb_alloc(size_t size) {
struct sk_buff *skb;
struct sk_buff_data *skb_data;
if (skb_data_pool.obj_size >= size) {
skb_data = skb_data_alloc();
} else {
skb_data = skb_data_alloc_dynamic(size);
}
if (skb_data == NULL) {
return NULL; /* error: no memory */
}
skb = skb_wrap(size, skb_data);
if (skb == NULL) {
skb_data_free(skb_data);
return NULL; /* error: no memory */
}
return skb;
}
struct sk_buff * skb_declone(struct sk_buff *skb) {
struct sk_buff_data *decloned_data;
assert(skb != NULL);
if (!skb_data_cloned(skb->data)) {
return skb;
}
decloned_data = skb_data_alloc();
if (decloned_data == NULL) {
return NULL; /* error: no memory */
}
skb_shift_ref(skb,
skb_get_data_pointner(decloned_data)
- skb_get_data_pointner(skb->data));
skb_copy_data(decloned_data, skb);
skb_data_free(skb->data);
skb->data = decloned_data;
return skb;
}