From 3e5cf362c34b14c8d01d19d4b821fb35e1779862 Mon Sep 17 00:00:00 2001 From: Jon Maloy Date: Wed, 25 Apr 2018 19:29:36 +0200 Subject: tipc: introduce ioctl for fetching node identity After the introduction of a 128-bit node identity it may be difficult for a user to correlate between this identity and the generated node hash address. We now try to make this easier by introducing a new ioctl() call for fetching a node identity by using the hash value as key. This will be particularly useful when we extend some of the commands in the 'tipc' tool, but we also expect regular user applications to need this feature. Acked-by: Ying Xue Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/node.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'net/tipc/node.c') diff --git a/net/tipc/node.c b/net/tipc/node.c index e9c52e1416c5..81e6dd0cd1ca 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -195,6 +195,27 @@ int tipc_node_get_mtu(struct net *net, u32 addr, u32 sel) return mtu; } +bool tipc_node_get_id(struct net *net, u32 addr, u8 *id) +{ + u8 *own_id = tipc_own_id(net); + struct tipc_node *n; + + if (!own_id) + return true; + + if (addr == tipc_own_addr(net)) { + memcpy(id, own_id, TIPC_NODEID_LEN); + return true; + } + n = tipc_node_find(net, addr); + if (!n) + return false; + + memcpy(id, &n->peer_id, TIPC_NODEID_LEN); + tipc_node_put(n); + return true; +} + u16 tipc_node_get_capabilities(struct net *net, u32 addr) { struct tipc_node *n; -- cgit v1.2.2