Function sctp_add_local_addr_restricted

freebsd/netinet/sctp_pcb.c:5456–5486

* Add the address to the TCB local address restricted list. * This is a "pending" address list (eg. addresses waiting for an * ASCONF-ACK response) and cannot be used as a valid source address. */

 * ASCONF-ACK response) and cannot be used as a valid source address.
 */
void
sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
{
	struct sctp_laddr *laddr;
	struct sctpladdr *list;

	/*
	 * Assumes TCB is locked.. and possibly the INP. May need to
	 * confirm/fix that if we need it and is not the case.
	 */
	list = &stcb->asoc.sctp_restricted_addrs;

#ifdef INET6
	if (ifa->address.sa.sa_family == AF_INET6) {
		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
			/* Can't bind a non-existent addr. */
			return;
		}
	}
#endif
	/* does the address already exist? */
	LIST_FOREACH(laddr, list, sctp_nxt_addr) {
		if (laddr->ifa == ifa) {
			return;
		}
	}

	/* add to the list */
	(void)sctp_insert_laddr(list, ifa, 0);
	return;
}

/*
 * Remove a local address from the TCB local address restricted list