diff options
| -rw-r--r-- | net/tipc/msg.c | 38 | ||||
| -rw-r--r-- | net/tipc/msg.h | 2 | ||||
| -rw-r--r-- | net/tipc/net.c | 33 | ||||
| -rw-r--r-- | net/tipc/socket.c | 16 |
4 files changed, 51 insertions, 38 deletions
diff --git a/net/tipc/msg.c b/net/tipc/msg.c index 6070dd0..7bfc442 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -36,6 +36,8 @@ #include "core.h" #include "msg.h" +#include "addr.h" +#include "name_table.h" #define MAX_FORWARD_SIZE 1024 @@ -370,3 +372,39 @@ exit: kfree_skb(buf); return false; } + +/** + * tipc_msg_eval: determine fate of message that found no destination + * @buf: the buffer containing the message. + * @dnode: return value: next-hop node, if message to be forwarded + * @err: error code to use, if message to be rejected + * + * Does not consume buffer + * Returns 0 (TIPC_OK) if message ok and we can try again, -TIPC error + * code if message to be rejected + */ +int tipc_msg_eval(struct sk_buff *buf, u32 *dnode) +{ + struct tipc_msg *msg = buf_msg(buf); + u32 dport; + + if (msg_type(msg) != TIPC_NAMED_MSG) + return -TIPC_ERR_NO_PORT; + if (skb_linearize(buf)) + return -TIPC_ERR_NO_NAME; + if (msg_data_sz(msg) > MAX_FORWARD_SIZE) + return -TIPC_ERR_NO_NAME; + if (msg_reroute_cnt(msg) > 0) + return -TIPC_ERR_NO_NAME; + + *dnode = addr_domain(msg_lookup_scope(msg)); + dport = tipc_nametbl_translate(msg_nametype(msg), + msg_nameinst(msg), + dnode); + if (!dport) + return -TIPC_ERR_NO_NAME; + msg_incr_reroute_cnt(msg); + msg_set_destnode(msg, *dnode); + msg_set_destport(msg, dport); + return TIPC_OK; +} diff --git a/net/tipc/msg.h b/net/tipc/msg.h index 3805094..7d57434 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -727,6 +727,8 @@ static inline u32 msg_tot_origport(struct tipc_msg *m) bool tipc_msg_reverse(struct sk_buff *buf, u32 *dnode, int err); +int tipc_msg_eval(struct sk_buff *buf, u32 *dnode); + void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize, u32 destnode); diff --git a/net/tipc/net.c b/net/tipc/net.c index f64375e..5f7d6ff 100644 --- a/net/tipc/net.c +++ b/net/tipc/net.c @@ -1,7 +1,7 @@ /* * net/tipc/net.c: TIPC network routing code * - * Copyright (c) 1995-2006, Ericsson AB + * Copyright (c) 1995-2006, 2014, Ericsson AB * Copyright (c) 2005, 2010-2011, Wind River Systems * All rights reserved. * @@ -103,29 +103,6 @@ * This is always used within the scope of a tipc_nametbl_lock(read). * - A local spin_lock protecting the queue of subscriber events. */ - -static void net_route_named_msg(struct sk_buff *buf) -{ - struct tipc_msg *msg = buf_msg(buf); - u32 dnode; - u32 dport; - - if (!msg_named(msg)) { - kfree_skb(buf); - return; - } - - dnode = addr_domain(msg_lookup_scope(msg)); - dport = tipc_nametbl_translate(msg_nametype(msg), msg_nameinst(msg), &dnode); - if (dport) { - msg_set_destnode(msg, dnode); - msg_set_destport(msg, dport); - tipc_net_route_msg(buf); - return; - } - tipc_reject_msg(buf, TIPC_ERR_NO_NAME); -} - void tipc_net_route_msg(struct sk_buff *buf) { struct tipc_msg *msg; @@ -141,10 +118,12 @@ void tipc_net_route_msg(struct sk_buff *buf) if (msg_isdata(msg)) { if (msg_mcast(msg)) tipc_port_mcast_rcv(buf, NULL); - else if (msg_destport(msg)) + else if (msg_destport(msg)) { tipc_sk_rcv(buf); - else - net_route_named_msg(buf); + } else { + pr_warn("Cannot route msg; no destination\n"); + kfree_skb(buf); + } return; } switch (msg_user(msg)) { diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 5961a63..e642ed5 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -1466,16 +1466,10 @@ int tipc_sk_rcv(struct sk_buff *buf) uint limit; u32 dnode; - /* Forward unresolved named message */ - if (unlikely(!dport)) { - tipc_net_route_msg(buf); - return 0; - } - - /* Validate destination */ + /* Validate destination and message */ port = tipc_port_lock(dport); if (unlikely(!port)) { - rc = -TIPC_ERR_NO_PORT; + rc = tipc_msg_eval(buf, &dnode); goto exit; } @@ -1494,17 +1488,17 @@ int tipc_sk_rcv(struct sk_buff *buf) if (sk_add_backlog(sk, buf, limit)) rc = -TIPC_ERR_OVERLOAD; } - bh_unlock_sock(sk); tipc_port_unlock(port); if (likely(!rc)) return 0; exit: - if (!tipc_msg_reverse(buf, &dnode, -rc)) + if ((rc < 0) && !tipc_msg_reverse(buf, &dnode, -rc)) return -EHOSTUNREACH; + tipc_link_xmit2(buf, dnode, 0); - return -EHOSTUNREACH; + return (rc < 0) ? -EHOSTUNREACH : 0; } static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
