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vpn: fix routing rules support in vpn conenctions

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This commit introduces the ability to manage routing rules specifically
for VPN connections. These rules allow finer control over traffic
routing by enabling the specification of policy-based routing for
traffic over the VPN.

- Updated the connection backend to apply rules during VPN activation.
- Ensured proper cleanup of routing rules upon VPN deactivation.

This enhancement improves VPN usability in scenarios requiring advanced
routing configurations, such as split tunneling and traffic
prioritization.

Resolves: https://issues.redhat.com/browse/RHEL-70160
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/2092
https://gitlab.freedesktop.org/NetworkManager/NetworkManager-ci/-/merge_requests/1842
(cherry picked from commit 308e34a501)
This commit is contained in:
Wen Liang 2024-12-20 10:10:25 -05:00
parent 29f23d3519
commit a24b347e93
3 changed files with 50 additions and 25 deletions
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62
src/core/devices/nm-device.c
View file

@ -10377,31 +10377,34 @@ lldp_setup(NMDevice *self, NMTernary enabled)
* as externally added ones. Don't restart NetworkManager if
* you care about that.
*/
static void
_routing_rules_sync(NMDevice *self, NMTernary set_mode)
void
nm_routing_rules_sync(NMConnection *applied_connection,
NMTernary set_mode,
GPtrArray *(*get_extra_rules)(NMDevice *self),
NMDevice *self,
NMNetns *netns)
{
NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE(self);
NMPGlobalTracker *global_tracker = nm_netns_get_global_tracker(nm_device_get_netns(self));
NMDeviceClass *klass = NM_DEVICE_GET_CLASS(self);
NMPGlobalTracker *global_tracker = nm_netns_get_global_tracker(netns);
gboolean untrack_only_dirty = FALSE;
gboolean keep_deleted_rules;
gpointer user_tag_1;
gpointer user_tag_2;
/* take two arbitrary user-tag pointers that belong to @self. */
user_tag_1 = &priv->v4_route_table;
user_tag_2 = &priv->v6_route_table;
if (self) {
user_tag_1 = ((guint32 *) self) + 1;
user_tag_2 = ((guint32 *) self) + 2;
} else {
user_tag_1 = ((guint32 *) applied_connection) + 1;
user_tag_2 = ((guint32 *) applied_connection) + 2;
}
if (set_mode == NM_TERNARY_TRUE) {
NMConnection *applied_connection;
NMSettingIPConfig *s_ip;
guint i, num;
int is_ipv4;
untrack_only_dirty = TRUE;
applied_connection = nm_device_get_applied_connection(self);
for (is_ipv4 = 0; applied_connection && is_ipv4 < 2; is_ipv4++) {
int addr_family = is_ipv4 ? AF_INET : AF_INET6;
@ -10440,10 +10443,10 @@ _routing_rules_sync(NMDevice *self, NMTernary set_mode)
}
}
if (klass->get_extra_rules) {
if (get_extra_rules) {
gs_unref_ptrarray GPtrArray *extra_rules = NULL;
extra_rules = klass->get_extra_rules(self);
extra_rules = get_extra_rules(self);
if (extra_rules) {
for (i = 0; i < extra_rules->len; i++) {
nmp_global_tracker_track_rule(
@ -10458,7 +10461,7 @@ _routing_rules_sync(NMDevice *self, NMTernary set_mode)
}
nmp_global_tracker_untrack_all(global_tracker, user_tag_1, !untrack_only_dirty, TRUE);
if (klass->get_extra_rules)
if (get_extra_rules)
nmp_global_tracker_untrack_all(global_tracker, user_tag_2, !untrack_only_dirty, TRUE);
keep_deleted_rules = FALSE;
@ -10518,8 +10521,8 @@ tc_commit(NMDevice *self)
static void
activate_stage2_device_config(NMDevice *self)
{
NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE(self);
NMDeviceClass *klass;
NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE(self);
NMDeviceClass *klass = NM_DEVICE_GET_CLASS(self);
NMActStageReturn ret;
NMSettingWired *s_wired;
gboolean no_firmware = FALSE;
@ -10544,7 +10547,11 @@ activate_stage2_device_config(NMDevice *self)
priv->tc_committed = TRUE;
}
_routing_rules_sync(self, NM_TERNARY_TRUE);
nm_routing_rules_sync(nm_device_get_applied_connection(self),
NM_TERNARY_TRUE,
klass->get_extra_rules,
self,
nm_device_get_netns(self));
if (!nm_device_managed_type_is_external_or_assume(self)) {
if (!nm_device_bring_up_full(self, FALSE, TRUE, &no_firmware)) {
@ -10556,7 +10563,6 @@ activate_stage2_device_config(NMDevice *self)
}
}
klass = NM_DEVICE_GET_CLASS(self);
if (klass->act_stage2_config_also_for_external_or_assume
|| !nm_device_managed_type_is_external_or_assume(self)) {
NMDeviceStateReason failure_reason = NM_DEVICE_STATE_REASON_NONE;
@ -13931,7 +13937,11 @@ check_and_reapply_connection(NMDevice *self,
nm_device_activate_schedule_stage3_ip_config(self, FALSE);
_routing_rules_sync(self, NM_TERNARY_TRUE);
nm_routing_rules_sync(nm_device_get_applied_connection(self),
NM_TERNARY_TRUE,
klass->get_extra_rules,
self,
nm_device_get_netns(self));
reactivate_proxy_config(self);
@ -16493,6 +16503,7 @@ static void
nm_device_cleanup(NMDevice *self, NMDeviceStateReason reason, CleanupType cleanup_type)
{
NMDevicePrivate *priv;
NMDeviceClass *klass = NM_DEVICE_GET_CLASS(self);
int ifindex;
g_return_if_fail(NM_IS_DEVICE(self));
@ -16517,8 +16528,8 @@ nm_device_cleanup(NMDevice *self, NMDeviceStateReason reason, CleanupType cleanu
}
/* Call device type-specific deactivation */
if (NM_DEVICE_GET_CLASS(self)->deactivate)
NM_DEVICE_GET_CLASS(self)->deactivate(self);
if (klass->deactivate)
klass->deactivate(self);
ifindex = nm_device_get_ip_ifindex(self);
@ -16540,8 +16551,11 @@ nm_device_cleanup(NMDevice *self, NMDeviceStateReason reason, CleanupType cleanu
priv->tc_committed = FALSE;
_routing_rules_sync(self,
cleanup_type == CLEANUP_TYPE_KEEP ? NM_TERNARY_DEFAULT : NM_TERNARY_FALSE);
nm_routing_rules_sync(nm_device_get_applied_connection(self),
cleanup_type == CLEANUP_TYPE_KEEP ? NM_TERNARY_DEFAULT : NM_TERNARY_FALSE,
klass->get_extra_rules,
self,
nm_device_get_netns(self));
if (ifindex > 0)
nm_platform_ip4_dev_route_blacklist_set(nm_device_get_platform(self), ifindex, NULL);
@ -16570,7 +16584,7 @@ nm_device_cleanup(NMDevice *self, NMDeviceStateReason reason, CleanupType cleanu
/* for other device states (UNAVAILABLE, DISCONNECTED), allow the
* device to overwrite the reset behavior, so that Wi-Fi can set
* a randomized MAC address used during scanning. */
NM_DEVICE_GET_CLASS(self)->deactivate_reset_hw_addr(self);
klass->deactivate_reset_hw_addr(self);
}
}

6
src/core/devices/nm-device.h
View file

@ -848,4 +848,10 @@ void nm_device_clear_dns_lookup_data(NMDevice *self, const char *reason);
gboolean nm_device_get_allow_autoconnect_on_external(NMDevice *self);
void nm_routing_rules_sync(NMConnection *applied_connection,
NMTernary set_mode,
GPtrArray *(*get_extra_rules)(NMDevice *self),
NMDevice *self,
NMNetns *netns);
#endif /* __NETWORKMANAGER_DEVICE_H__ */

7
src/core/vpn/nm-vpn-connection.c
View file

@ -905,7 +905,8 @@ fw_call_cleanup(NMVpnConnection *self)
static void
vpn_cleanup(NMVpnConnection *self, NMDevice *parent_dev)
{
const char *iface;
NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self);
const char *iface;
/* Remove zone from firewall */
iface = nm_vpn_connection_get_ip_iface(self, FALSE);
@ -917,6 +918,8 @@ vpn_cleanup(NMVpnConnection *self, NMDevice *parent_dev)
fw_call_cleanup(self);
_l3cfg_l3cd_clear_all(self);
nm_routing_rules_sync(_get_applied_connection(self), NM_TERNARY_FALSE, NULL, NULL, priv->netns);
}
static void
@ -2278,6 +2281,8 @@ _dbus_signal_ip_config_cb(NMVpnConnection *self, int addr_family, GVariant *dict
_l3cfg_l3cd_set(self, L3CD_TYPE_IP_X(IS_IPv4), l3cd);
nm_routing_rules_sync(_get_applied_connection(self), NM_TERNARY_TRUE, NULL, NULL, priv->netns);
_check_complete(self, TRUE);
}