Function sctp_insert_sharedkey

freebsd/netinet/sctp_auth.c:499–544

}

int
sctp_insert_sharedkey(struct sctp_keyhead *shared_keys,
    sctp_sharedkey_t *new_skey)
{
	sctp_sharedkey_t *skey;

	if ((shared_keys == NULL) || (new_skey == NULL))
		return (EINVAL);

	/* insert into an empty list? */
	if (LIST_EMPTY(shared_keys)) {
		LIST_INSERT_HEAD(shared_keys, new_skey, next);
		return (0);
	}
	/* insert into the existing list, ordered by key id */
	LIST_FOREACH(skey, shared_keys, next) {
		if (new_skey->keyid < skey->keyid) {
			/* insert it before here */
			LIST_INSERT_BEFORE(skey, new_skey, next);
			return (0);
		} else if (new_skey->keyid == skey->keyid) {
			/* replace the existing key */
			/* verify this key *can* be replaced */
			if ((skey->deactivated) || (skey->refcount > 1)) {
				SCTPDBG(SCTP_DEBUG_AUTH1,
				    "can't replace shared key id %u\n",
				    new_skey->keyid);
				return (EBUSY);
			}
			SCTPDBG(SCTP_DEBUG_AUTH1,
			    "replacing shared key id %u\n",
			    new_skey->keyid);
			LIST_INSERT_BEFORE(skey, new_skey, next);
			LIST_REMOVE(skey, next);
			sctp_free_sharedkey(skey);
			return (0);
		}
		if (LIST_NEXT(skey, next) == NULL) {
			/* belongs at the end of the list */
			LIST_INSERT_AFTER(skey, new_skey, next);
			return (0);
		}
	}
	/* shouldn't reach here */
	return (EINVAL);
}

void
sctp_auth_key_acquire(struct sctp_tcb *stcb, uint16_t key_id)