goto out;
}
- retval = sctp_send_asconf(asoc, chunk);
- if (retval)
- goto out;
-
/* Add the new addresses to the bind address list with
* use_as_src set to 0.
*/
SCTP_ADDR_NEW, GFP_ATOMIC);
addr_buf += af->sockaddr_len;
}
+ if (asoc->src_out_of_asoc_ok) {
+ struct sctp_transport *trans;
+
+ list_for_each_entry(trans,
+ &asoc->peer.transport_addr_list, transports) {
+ /* Clear the source and route cache */
+ dst_release(trans->dst);
+ trans->cwnd = min(4*asoc->pathmtu, max_t(__u32,
+ 2*asoc->pathmtu, 4380));
+ trans->ssthresh = asoc->peer.i.a_rwnd;
+ trans->rto = asoc->rto_initial;
+ trans->rtt = trans->srtt = trans->rttvar = 0;
+ sctp_transport_route(trans, NULL,
+ sctp_sk(asoc->base.sk));
+ }
+ }
+ retval = sctp_send_asconf(asoc, chunk);
}
out:
struct sctp_sockaddr_entry *saddr;
int i;
int retval = 0;
+ int stored = 0;
+ chunk = NULL;
if (!sctp_addip_enable)
return retval;
bp = &asoc->base.bind_addr;
laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs,
addrcnt, sp);
- if (!laddr)
- continue;
+ if ((laddr == NULL) && (addrcnt == 1)) {
+ if (asoc->asconf_addr_del_pending)
+ continue;
+ asoc->asconf_addr_del_pending =
+ kzalloc(sizeof(union sctp_addr), GFP_ATOMIC);
+ if (asoc->asconf_addr_del_pending == NULL) {
+ retval = -ENOMEM;
+ goto out;
+ }
+ asoc->asconf_addr_del_pending->sa.sa_family =
+ addrs->sa_family;
+ asoc->asconf_addr_del_pending->v4.sin_port =
+ htons(bp->port);
+ if (addrs->sa_family == AF_INET) {
+ struct sockaddr_in *sin;
+
+ sin = (struct sockaddr_in *)addrs;
+ asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr;
+ } else if (addrs->sa_family == AF_INET6) {
+ struct sockaddr_in6 *sin6;
+
+ sin6 = (struct sockaddr_in6 *)addrs;
+ ipv6_addr_copy(&asoc->asconf_addr_del_pending->v6.sin6_addr, &sin6->sin6_addr);
+ }
+ SCTP_DEBUG_PRINTK_IPADDR("send_asconf_del_ip: keep the last address asoc: %p ",
+ " at %p\n", asoc, asoc->asconf_addr_del_pending,
+ asoc->asconf_addr_del_pending);
+ asoc->src_out_of_asoc_ok = 1;
+ stored = 1;
+ goto skip_mkasconf;
+ }
/* We do not need RCU protection throughout this loop
* because this is done under a socket lock from the
goto out;
}
+skip_mkasconf:
/* Reset use_as_src flag for the addresses in the bind address
* list that are to be deleted.
*/
sctp_sk(asoc->base.sk));
}
+ if (stored)
+ /* We don't need to transmit ASCONF */
+ continue;
retval = sctp_send_asconf(asoc, chunk);
}
out:
return retval;
}
+/* set addr events to assocs in the endpoint. ep and addr_wq must be locked */
+int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw)
+{
+ struct sock *sk = sctp_opt2sk(sp);
+ union sctp_addr *addr;
+ struct sctp_af *af;
+
+ /* It is safe to write port space in caller. */
+ addr = &addrw->a;
+ addr->v4.sin_port = htons(sp->ep->base.bind_addr.port);
+ af = sctp_get_af_specific(addr->sa.sa_family);
+ if (!af)
+ return -EINVAL;
+ if (sctp_verify_addr(sk, addr, af->sockaddr_len))
+ return -EINVAL;
+
+ if (addrw->state == SCTP_ADDR_NEW)
+ return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1);
+ else
+ return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1);
+}
+
/* Helper for tunneling sctp_bindx() requests through sctp_setsockopt()
*
* API 8.1
}
+/*
+ * 8.1.23 SCTP_AUTO_ASCONF
+ *
+ * This option will enable or disable the use of the automatic generation of
+ * ASCONF chunks to add and delete addresses to an existing association. Note
+ * that this option has two caveats namely: a) it only affects sockets that
+ * are bound to all addresses available to the SCTP stack, and b) the system
+ * administrator may have an overriding control that turns the ASCONF feature
+ * off no matter what setting the socket option may have.
+ * This option expects an integer boolean flag, where a non-zero value turns on
+ * the option, and a zero value turns off the option.
+ * Note. In this implementation, socket operation overrides default parameter
+ * being set by sysctl as well as FreeBSD implementation
+ */
+static int sctp_setsockopt_auto_asconf(struct sock *sk, char __user *optval,
+ unsigned int optlen)
+{
+ int val;
+ struct sctp_sock *sp = sctp_sk(sk);
+
+ if (optlen < sizeof(int))
+ return -EINVAL;
+ if (get_user(val, (int __user *)optval))
+ return -EFAULT;
+ if (!sctp_is_ep_boundall(sk) && val)
+ return -EINVAL;
+ if ((val && sp->do_auto_asconf) || (!val && !sp->do_auto_asconf))
+ return 0;
+
+ if (val == 0 && sp->do_auto_asconf) {
+ list_del(&sp->auto_asconf_list);
+ sp->do_auto_asconf = 0;
+ } else if (val && !sp->do_auto_asconf) {
+ list_add_tail(&sp->auto_asconf_list,
+ &sctp_auto_asconf_splist);
+ sp->do_auto_asconf = 1;
+ }
+ return 0;
+}
+
/* API 6.2 setsockopt(), getsockopt()
*
case SCTP_AUTH_DELETE_KEY:
retval = sctp_setsockopt_del_key(sk, optval, optlen);
break;
+ case SCTP_AUTO_ASCONF:
+ retval = sctp_setsockopt_auto_asconf(sk, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
local_bh_disable();
percpu_counter_inc(&sctp_sockets_allocated);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
+ if (sctp_default_auto_asconf) {
+ list_add_tail(&sp->auto_asconf_list,
+ &sctp_auto_asconf_splist);
+ sp->do_auto_asconf = 1;
+ } else
+ sp->do_auto_asconf = 0;
local_bh_enable();
return 0;
/* Cleanup any SCTP per socket resources. */
SCTP_STATIC void sctp_destroy_sock(struct sock *sk)
{
- struct sctp_endpoint *ep;
+ struct sctp_sock *sp;
SCTP_DEBUG_PRINTK("sctp_destroy_sock(sk: %p)\n", sk);
/* Release our hold on the endpoint. */
- ep = sctp_sk(sk)->ep;
- sctp_endpoint_free(ep);
+ sp = sctp_sk(sk);
+ if (sp->do_auto_asconf) {
+ sp->do_auto_asconf = 0;
+ list_del(&sp->auto_asconf_list);
+ }
+ sctp_endpoint_free(sp->ep);
local_bh_disable();
percpu_counter_dec(&sctp_sockets_allocated);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
return 0;
}
+/*
+ * 8.1.23 SCTP_AUTO_ASCONF
+ * See the corresponding setsockopt entry as description
+ */
+static int sctp_getsockopt_auto_asconf(struct sock *sk, int len,
+ char __user *optval, int __user *optlen)
+{
+ int val = 0;
+
+ if (len < sizeof(int))
+ return -EINVAL;
+
+ len = sizeof(int);
+ if (sctp_sk(sk)->do_auto_asconf && sctp_is_ep_boundall(sk))
+ val = 1;
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, &val, len))
+ return -EFAULT;
+ return 0;
+}
+
/*
* 8.2.6. Get the Current Identifiers of Associations
* (SCTP_GET_ASSOC_ID_LIST)
case SCTP_GET_ASSOC_ID_LIST:
retval = sctp_getsockopt_assoc_ids(sk, len, optval, optlen);
break;
+ case SCTP_AUTO_ASCONF:
+ retval = sctp_getsockopt_auto_asconf(sk, len, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
struct sk_buff *skb, *tmp;
struct sctp_ulpevent *event;
struct sctp_bind_hashbucket *head;
+ struct list_head tmplist;
/* Migrate socket buffer sizes and all the socket level options to the
* new socket.
newsk->sk_sndbuf = oldsk->sk_sndbuf;
newsk->sk_rcvbuf = oldsk->sk_rcvbuf;
/* Brute force copy old sctp opt. */
- inet_sk_copy_descendant(newsk, oldsk);
+ if (oldsp->do_auto_asconf) {
+ memcpy(&tmplist, &newsp->auto_asconf_list, sizeof(tmplist));
+ inet_sk_copy_descendant(newsk, oldsk);
+ memcpy(&newsp->auto_asconf_list, &tmplist, sizeof(tmplist));
+ } else
+ inet_sk_copy_descendant(newsk, oldsk);
/* Restore the ep value that was overwritten with the above structure
* copy.
projects / mirror_ubuntu-bionic-kernel.git / blobdiff