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tipc: add UDP remoteip dump to netlink API

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When using replicast a UDP bearer can have an arbitrary amount of
remote ip addresses associated with it. This means we cannot simply
add all remote ip addresses to an existing bearer data message as it
might fill the message, leaving us with a truncated message that we
can't safely resume. To handle this we introduce the new netlink
command TIPC_NL_UDP_GET_REMOTEIP. This command is intended to be
called when the bearer data message has the
TIPC_NLA_UDP_MULTI_REMOTEIP flag set, indicating there are more than
one remote ip (replicast).

Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Richard Alpe
2016-08-26 10:52:56 +02:00
committed by David S. Miller
parent fdb3accc2c
commit 832629ca5c
3 changed files with 100 additions and 1 deletions
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10
net/tipc/netlink.c
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@@ -41,6 +41,7 @@
#include "link.h"
#include "node.h"
#include "net.h"
#include "udp_media.h"
#include <net/genetlink.h>
static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
@@ -247,7 +248,14 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
.cmd = TIPC_NL_PEER_REMOVE,
.doit = tipc_nl_peer_rm,
.policy = tipc_nl_policy,
}
},
#ifdef CONFIG_TIPC_MEDIA_UDP
{
.cmd = TIPC_NL_UDP_GET_REMOTEIP,
.dumpit = tipc_udp_nl_dump_remoteip,
.policy = tipc_nl_policy,
},
#endif
};
int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)