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authorGeliang Tang <geliangtang@gmail.com>2021-06-22 22:25:18 +0300
committerDavid S. Miller <davem@davemloft.net>2021-06-23 00:36:01 +0300
commitd2f77960e5b03b2d373252b2ee150a4a14010f99 (patch)
treec408f08035adb2cb51becf1e8bd499d38bfa84d0 /net/mptcp/ctrl.c
parenta432c771e2d9bc059ffe3028faf040c08b6a9f98 (diff)
downloadlinux-d2f77960e5b03b2d373252b2ee150a4a14010f99.tar.xz
mptcp: add sysctl allow_join_initial_addr_port
This patch added a new sysctl, named allow_join_initial_addr_port, to control whether allow peers to send join requests to the IP address and port number used by the initial subflow. Suggested-by: Florian Westphal <fw@strlen.de> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mptcp/ctrl.c')
-rw-r--r--net/mptcp/ctrl.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/net/mptcp/ctrl.c b/net/mptcp/ctrl.c
index 6c2639bb9c19..7d738bd06f2c 100644
--- a/net/mptcp/ctrl.c
+++ b/net/mptcp/ctrl.c
@@ -24,6 +24,7 @@ struct mptcp_pernet {
u8 mptcp_enabled;
unsigned int add_addr_timeout;
u8 checksum_enabled;
+ u8 allow_join_initial_addr_port;
};
static struct mptcp_pernet *mptcp_get_pernet(struct net *net)
@@ -46,11 +47,17 @@ int mptcp_is_checksum_enabled(struct net *net)
return mptcp_get_pernet(net)->checksum_enabled;
}
+int mptcp_allow_join_id0(struct net *net)
+{
+ return mptcp_get_pernet(net)->allow_join_initial_addr_port;
+}
+
static void mptcp_pernet_set_defaults(struct mptcp_pernet *pernet)
{
pernet->mptcp_enabled = 1;
pernet->add_addr_timeout = TCP_RTO_MAX;
pernet->checksum_enabled = 0;
+ pernet->allow_join_initial_addr_port = 1;
}
#ifdef CONFIG_SYSCTL
@@ -80,6 +87,14 @@ static struct ctl_table mptcp_sysctl_table[] = {
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE
},
+ {
+ .procname = "allow_join_initial_addr_port",
+ .maxlen = sizeof(u8),
+ .mode = 0644,
+ .proc_handler = proc_dou8vec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE
+ },
{}
};
@@ -98,6 +113,7 @@ static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet)
table[0].data = &pernet->mptcp_enabled;
table[1].data = &pernet->add_addr_timeout;
table[2].data = &pernet->checksum_enabled;
+ table[3].data = &pernet->allow_join_initial_addr_port;
hdr = register_net_sysctl(net, MPTCP_SYSCTL_PATH, table);
if (!hdr)