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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-12-06 22:50:54 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-12-07 01:07:49 -0800
commit8e71a11c9f3c09a01fcb445772ffd61b140f2479 (patch)
treea0fb2c002d472252ea060c88f8dfda6ddb23b3fc
parentf26f7c480555812ca7c4037e0a50fa54afe2cb4a (diff)
[SCTP]: Fix the bind_addr info during migration.
During accept/migrate the code attempts to copy the addresses from the parent endpoint to the new endpoint. However, if the parent was bound to a wildcard address, then we end up pointlessly copying all of the current addresses on the system. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/sctp/structs.h3
-rw-r--r--net/sctp/bind_addr.c26
-rw-r--r--net/sctp/socket.c12
3 files changed, 31 insertions, 10 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index eb3113c38a9..002a00a4e6b 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -1184,6 +1184,9 @@ int sctp_bind_addr_copy(struct sctp_bind_addr *dest,
const struct sctp_bind_addr *src,
sctp_scope_t scope, gfp_t gfp,
int flags);
+int sctp_bind_addr_dup(struct sctp_bind_addr *dest,
+ const struct sctp_bind_addr *src,
+ gfp_t gfp);
int sctp_add_bind_addr(struct sctp_bind_addr *, union sctp_addr *,
__u8 use_as_src, gfp_t gfp);
int sctp_del_bind_addr(struct sctp_bind_addr *, union sctp_addr *);
diff --git a/net/sctp/bind_addr.c b/net/sctp/bind_addr.c
index cae95af9a8c..6a7d01091f0 100644
--- a/net/sctp/bind_addr.c
+++ b/net/sctp/bind_addr.c
@@ -105,6 +105,32 @@ out:
return error;
}
+/* Exactly duplicate the address lists. This is necessary when doing
+ * peer-offs and accepts. We don't want to put all the current system
+ * addresses into the endpoint. That's useless. But we do want duplicat
+ * the list of bound addresses that the older endpoint used.
+ */
+int sctp_bind_addr_dup(struct sctp_bind_addr *dest,
+ const struct sctp_bind_addr *src,
+ gfp_t gfp)
+{
+ struct sctp_sockaddr_entry *addr;
+ struct list_head *pos;
+ int error = 0;
+
+ /* All addresses share the same port. */
+ dest->port = src->port;
+
+ list_for_each(pos, &src->address_list) {
+ addr = list_entry(pos, struct sctp_sockaddr_entry, list);
+ error = sctp_add_bind_addr(dest, &addr->a, 1, gfp);
+ if (error < 0)
+ break;
+ }
+
+ return error;
+}
+
/* Initialize the SCTP_bind_addr structure for either an endpoint or
* an association.
*/
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 9f5d7930f54..ea9649ca0b2 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -6326,7 +6326,6 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
struct sk_buff *skb, *tmp;
struct sctp_ulpevent *event;
struct sctp_bind_hashbucket *head;
- int flags = 0;
/* Migrate socket buffer sizes and all the socket level options to the
* new socket.
@@ -6356,15 +6355,8 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
/* Copy the bind_addr list from the original endpoint to the new
* endpoint so that we can handle restarts properly
*/
- if (PF_INET6 == assoc->base.sk->sk_family)
- flags = SCTP_ADDR6_ALLOWED;
- if (assoc->peer.ipv4_address)
- flags |= SCTP_ADDR4_PEERSUPP;
- if (assoc->peer.ipv6_address)
- flags |= SCTP_ADDR6_PEERSUPP;
- sctp_bind_addr_copy(&newsp->ep->base.bind_addr,
- &oldsp->ep->base.bind_addr,
- SCTP_SCOPE_GLOBAL, GFP_KERNEL, flags);
+ sctp_bind_addr_dup(&newsp->ep->base.bind_addr,
+ &oldsp->ep->base.bind_addr, GFP_KERNEL);
/* Move any messages in the old socket's receive queue that are for the
* peeled off association to the new socket's receive queue.