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| author | Jon Paul Maloy <jon.maloy@ericsson.com> | 2015-03-13 23:08:05 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-03-14 21:38:32 +0300 |
| commit | 7764d6e83d2c3b50d9282f12144ebb10418c056e (patch) | |
| tree | 0d795d365ae5ca2a78983e87c4c27c6d1f573ec1 /net/tipc/discover.c | |
| parent | 5f1764ddfeb038decfe2b2fda030d0bed43fa36a (diff) | |
| download | linux-7764d6e83d2c3b50d9282f12144ebb10418c056e.tar.xz | |
tipc: add framework for node capabilities exchange
The TIPC protocol spec has defined a 13 bit capability bitmap in
the neighbor discovery header, as a means to maintain compatibility
between different code and protocol generations. Until now this field
has been unused.
We now introduce the basic framework for exchanging capabilities
between nodes at first contact. After exchange, a peer node's
capabilities are stored as a 16 bit bitmap in struct tipc_node.
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/discover.c')
| -rw-r--r-- | net/tipc/discover.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/tipc/discover.c b/net/tipc/discover.c index 5967506833ce..169f3dd038b9 100644 --- a/net/tipc/discover.c +++ b/net/tipc/discover.c @@ -89,6 +89,7 @@ static void tipc_disc_init_msg(struct net *net, struct sk_buff *buf, u32 type, MAX_H_SIZE, dest_domain); msg_set_non_seq(msg, 1); msg_set_node_sig(msg, tn->random); + msg_set_node_capabilities(msg, 0); msg_set_dest_domain(msg, dest_domain); msg_set_bc_netid(msg, tn->net_id); b_ptr->media->addr2msg(msg_media_addr(msg), &b_ptr->addr); @@ -133,6 +134,7 @@ void tipc_disc_rcv(struct net *net, struct sk_buff *buf, u32 net_id = msg_bc_netid(msg); u32 mtyp = msg_type(msg); u32 signature = msg_node_sig(msg); + u16 caps = msg_node_capabilities(msg); bool addr_match = false; bool sign_match = false; bool link_up = false; @@ -167,6 +169,7 @@ void tipc_disc_rcv(struct net *net, struct sk_buff *buf, if (!node) return; tipc_node_lock(node); + node->capabilities = caps; link = node->links[bearer->identity]; /* Prepare to validate requesting node's signature and media address */ |