This commit adds two new arguments:
* WGDEVICE_A_TRANSIT_NETNS_PID
The argument is a U32 process id that refers to a process whose
network namespace is to be used as the transit namespace.
* WGDEVICE_A_TRANSIT_NETNS_FD
The argument is a U32 file descriptor that refers to a network
namespace that is to be used as the transit namespace.
---
src/netlink.c | 52 ++++++++++++++++++++++++++++++++++----------
src/uapi/wireguard.h | 12 +++++++---
2 files changed, 49 insertions(+), 15 deletions(-)
diff --git a/src/netlink.c b/src/netlink.c
index 73d9a74..f74c23a 100644
--- a/src/netlink.c
+++ b/src/netlink.c
@@ -24,7 +24,9 @@ static const struct nla_policy device_policy[WGDEVICE_A_MAX +
1] = {
[WGDEVICE_A_FLAGS] = { .type = NLA_U32 },
[WGDEVICE_A_LISTEN_PORT] = { .type = NLA_U16 },
[WGDEVICE_A_FWMARK] = { .type = NLA_U32 },
- [WGDEVICE_A_PEERS] = { .type = NLA_NESTED }
+ [WGDEVICE_A_PEERS] = { .type = NLA_NESTED },
+ [WGDEVICE_A_TRANSIT_NETNS_PID] = { .type = NLA_U32 },
+ [WGDEVICE_A_TRANSIT_NETNS_FD] = { .type = NLA_U32 },
};
static const struct nla_policy peer_policy[WGPEER_A_MAX + 1] = {
@@ -302,19 +304,48 @@ static int get_device_done(struct netlink_callback *cb)
return 0;
}
-static int set_port(struct wireguard_device *wg, u16 port)
+static int set_socket(struct wireguard_device *wg, struct nlattr **attrs)
{
struct wireguard_peer *peer;
+ struct nlattr *port_attr, *net_pid, *net_fd;
+ u16 port;
+ struct net *net = NULL;
+ int ret = 0;
+
+ port_attr = attrs[WGDEVICE_A_LISTEN_PORT];
+ net_pid = attrs[WGDEVICE_A_TRANSIT_NETNS_PID];
+ net_fd = attrs[WGDEVICE_A_TRANSIT_NETNS_FD];
+
+ if (net_pid && net_fd)
+ return -EINVAL;
+ if (net_pid)
+ net = get_net_ns_by_pid(nla_get_u32(net_pid));
+ if (net_fd)
+ net = get_net_ns_by_fd(nla_get_u32(net_fd));
+ if (IS_ERR(net))
+ return PTR_ERR(net);
+ if (port_attr)
+ port = nla_get_u16(port_attr);
+ else
+ port = wg->incoming_port;
+
+ if (wg->incoming_port == port && (!net || wg->transit_net == net))
+ goto out;
- if (wg->incoming_port == port)
- return 0;
list_for_each_entry (peer, &wg->peer_list, peer_list)
socket_clear_peer_endpoint_src(peer);
if (!netif_running(wg->dev)) {
wg->incoming_port = port;
- return 0;
+ if (net)
+ device_set_nets(wg, wg->dev_net, net);
+ goto out;
}
- return socket_init(wg, wg->transit_net, port);
+ ret = socket_init(wg, net ? : wg->transit_net, port);
+
+out:
+ if (net)
+ put_net(net);
+ return ret;
}
static int set_allowedip(struct wireguard_peer *peer, struct nlattr **attrs)
@@ -496,12 +527,9 @@ static int set_device(struct sk_buff *skb, struct
genl_info *info)
socket_clear_peer_endpoint_src(peer);
}
- if (info->attrs[WGDEVICE_A_LISTEN_PORT]) {
- ret = set_port(
- wg, nla_get_u16(info->attrs[WGDEVICE_A_LISTEN_PORT]));
- if (ret)
- goto out;
- }
+ ret = set_socket(wg, info->attrs);
+ if (ret)
+ goto out;
if (info->attrs[WGDEVICE_A_FLAGS] &&
nla_get_u32(info->attrs[WGDEVICE_A_FLAGS]) &
diff --git a/src/uapi/wireguard.h b/src/uapi/wireguard.h
index 3d73ad7..21bf92e 100644
--- a/src/uapi/wireguard.h
+++ b/src/uapi/wireguard.h
@@ -72,9 +72,11 @@
* WG_CMD_SET_DEVICE
* -----------------
*
- * May only be called via NLM_F_REQUEST. The command should contain the
- * following tree of nested items, containing one but not both of
- * WGDEVICE_A_IFINDEX and WGDEVICE_A_IFNAME:
+ * May only be called via NLM_F_REQUEST. The command must contain the following
+ * tree of nested items. Exactly one of WGDEVICE_A_IFINDEX and
WGDEVICE_A_IFNAME
+ * must be provided. All other top-level items are optional. At most one of
+ * WGDEVICE_A_TRANSIT_NETNS_PID and WGDEVICE_A_TRANSIT_NETNS_FD may be
provided.
+ *
*
* WGDEVICE_A_IFINDEX: NLA_U32
* WGDEVICE_A_IFNAME: NLA_NUL_STRING, maxlen IFNAMESIZ - 1
@@ -82,6 +84,8 @@
* peers should be removed prior to adding the list below.
* WGDEVICE_A_PRIVATE_KEY: len WG_KEY_LEN, all zeros to remove
* WGDEVICE_A_LISTEN_PORT: NLA_U16, 0 to choose randomly
+ * WGDEVICE_A_TRANSIT_NETNS_PID: NLA_U32
+ * WGDEVICE_A_TRANSIT_NETNS_FD: NLA_U32
* WGDEVICE_A_FWMARK: NLA_U32, 0 to disable
* WGDEVICE_A_PEERS: NLA_NESTED
* 0: NLA_NESTED
@@ -154,6 +158,8 @@ enum wgdevice_attribute {
WGDEVICE_A_LISTEN_PORT,
WGDEVICE_A_FWMARK,
WGDEVICE_A_PEERS,
+ WGDEVICE_A_TRANSIT_NETNS_PID,
+ WGDEVICE_A_TRANSIT_NETNS_FD,
__WGDEVICE_A_LAST
};
#define WGDEVICE_A_MAX (__WGDEVICE_A_LAST - 1)
--
2.18.0
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