diff options
Diffstat (limited to 'net/tipc/port.c')
| -rw-r--r-- | net/tipc/port.c | 59 |
1 files changed, 30 insertions, 29 deletions
diff --git a/net/tipc/port.c b/net/tipc/port.c index f1f6b33f761c..616c72fb9234 100644 --- a/net/tipc/port.c +++ b/net/tipc/port.c @@ -69,6 +69,28 @@ static inline u32 port_peerport(struct tipc_port *p_ptr) return msg_destport(&p_ptr->phdr); } +/* + * tipc_port_peer_msg - verify message was sent by connected port's peer + * + * Handles cases where the node's network address has changed from + * the default of <0.0.0> to its configured setting. + */ + +int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg) +{ + u32 peernode; + u32 orignode; + + if (msg_origport(msg) != port_peerport(p_ptr)) + return 0; + + orignode = msg_orignode(msg); + peernode = port_peernode(p_ptr); + return (orignode == peernode) || + (!orignode && (peernode == tipc_own_addr)) || + (!peernode && (orignode == tipc_own_addr)); +} + /** * tipc_multicast - send a multicast message to local and remote destinations */ @@ -526,25 +548,21 @@ void tipc_port_recv_proto_msg(struct sk_buff *buf) struct tipc_msg *msg = buf_msg(buf); struct tipc_port *p_ptr; struct sk_buff *r_buf = NULL; - u32 orignode = msg_orignode(msg); - u32 origport = msg_origport(msg); u32 destport = msg_destport(msg); int wakeable; /* Validate connection */ p_ptr = tipc_port_lock(destport); - if (!p_ptr || !p_ptr->connected || - (port_peernode(p_ptr) != orignode) || - (port_peerport(p_ptr) != origport)) { + if (!p_ptr || !p_ptr->connected || !tipc_port_peer_msg(p_ptr, msg)) { r_buf = tipc_buf_acquire(BASIC_H_SIZE); if (r_buf) { msg = buf_msg(r_buf); tipc_msg_init(msg, TIPC_HIGH_IMPORTANCE, TIPC_CONN_MSG, - BASIC_H_SIZE, orignode); + BASIC_H_SIZE, msg_orignode(msg)); msg_set_errcode(msg, TIPC_ERR_NO_PORT); msg_set_origport(msg, destport); - msg_set_destport(msg, origport); + msg_set_destport(msg, msg_origport(msg)); } if (p_ptr) tipc_port_unlock(p_ptr); @@ -681,6 +699,7 @@ static void port_dispatcher_sigh(void *dummy) struct tipc_name_seq dseq; void *usr_handle; int connected; + int peer_invalid; int published; u32 message_type; @@ -701,6 +720,7 @@ static void port_dispatcher_sigh(void *dummy) up_ptr = p_ptr->user_port; usr_handle = up_ptr->usr_handle; connected = p_ptr->connected; + peer_invalid = connected && !tipc_port_peer_msg(p_ptr, msg); published = p_ptr->published; if (unlikely(msg_errcode(msg))) @@ -710,8 +730,6 @@ static void port_dispatcher_sigh(void *dummy) case TIPC_CONN_MSG:{ tipc_conn_msg_event cb = up_ptr->conn_msg_cb; - u32 peer_port = port_peerport(p_ptr); - u32 peer_node = port_peernode(p_ptr); u32 dsz; tipc_port_unlock(p_ptr); @@ -720,8 +738,7 @@ static void port_dispatcher_sigh(void *dummy) if (unlikely(!connected)) { if (tipc_connect2port(dref, &orig)) goto reject; - } else if ((msg_origport(msg) != peer_port) || - (msg_orignode(msg) != peer_node)) + } else if (peer_invalid) goto reject; dsz = msg_data_sz(msg); if (unlikely(dsz && @@ -773,14 +790,9 @@ err: case TIPC_CONN_MSG:{ tipc_conn_shutdown_event cb = up_ptr->conn_err_cb; - u32 peer_port = port_peerport(p_ptr); - u32 peer_node = port_peernode(p_ptr); tipc_port_unlock(p_ptr); - if (!cb || !connected) - break; - if ((msg_origport(msg) != peer_port) || - (msg_orignode(msg) != peer_node)) + if (!cb || !connected || peer_invalid) break; tipc_disconnect(dref); skb_pull(buf, msg_hdr_sz(msg)); @@ -1157,17 +1169,6 @@ int tipc_port_recv_msg(struct sk_buff *buf) /* validate destination & pass to port, otherwise reject message */ p_ptr = tipc_port_lock(destport); if (likely(p_ptr)) { - if (likely(p_ptr->connected)) { - if ((unlikely(msg_origport(msg) != - port_peerport(p_ptr))) || - (unlikely(msg_orignode(msg) != - port_peernode(p_ptr))) || - (unlikely(!msg_connected(msg)))) { - err = TIPC_ERR_NO_PORT; - tipc_port_unlock(p_ptr); - goto reject; - } - } err = p_ptr->dispatcher(p_ptr, buf); tipc_port_unlock(p_ptr); if (likely(!err)) @@ -1175,7 +1176,7 @@ int tipc_port_recv_msg(struct sk_buff *buf) } else { err = TIPC_ERR_NO_PORT; } -reject: + return tipc_reject_msg(buf, err); } |