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https://gitlab.freedesktop.org/NetworkManager/NetworkManager
synced 2024-09-06 17:14:02 +00:00
dhcp: support notifying the client of the result of DAD
The DHCP client is not meant to use the assigned address before DAD has completed successfully, if enabled. And if DAD fails, the server should be notified with a DECLINE, in order to potentially blacklist the address. Currently, none of the clients support this, but add the required callbacks, and allow clients to opt in if they want.
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@ -7694,9 +7694,13 @@ clear_config:
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static void
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dhcp4_dad_cb (NMDevice *self, NMIP4Config **configs, gboolean success)
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{
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if (success)
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NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (self);
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if (success) {
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nm_dhcp_client_accept (priv->dhcp4.client, NULL);
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nm_device_activate_schedule_ip_config_result (self, AF_INET, NM_IP_CONFIG_CAST (configs[1]));
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else {
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} else {
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nm_dhcp_client_decline (priv->dhcp4.client, "Address conflict detected", NULL);
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nm_device_ip_method_failed (self, AF_INET,
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NM_DEVICE_STATE_REASON_IP_ADDRESS_DUPLICATE);
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}
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@ -530,6 +530,36 @@ nm_dhcp_client_start_ip4 (NMDhcpClient *self,
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error);
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}
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gboolean
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nm_dhcp_client_accept (NMDhcpClient *self,
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GError **error)
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{
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g_return_val_if_fail (NM_IS_DHCP_CLIENT (self), FALSE);
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if (NM_DHCP_CLIENT_GET_CLASS (self)->accept) {
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return NM_DHCP_CLIENT_GET_CLASS (self)->accept (self,
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error);
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}
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return TRUE;
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}
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gboolean
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nm_dhcp_client_decline (NMDhcpClient *self,
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const char *error_message,
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GError **error)
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{
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g_return_val_if_fail (NM_IS_DHCP_CLIENT (self), FALSE);
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if (NM_DHCP_CLIENT_GET_CLASS (self)->decline) {
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return NM_DHCP_CLIENT_GET_CLASS (self)->decline (self,
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error_message,
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error);
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}
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return TRUE;
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}
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static GBytes *
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get_duid (NMDhcpClient *self)
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{
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@ -82,6 +82,13 @@ typedef struct {
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const char *last_ip4_address,
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GError **error);
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gboolean (*accept) (NMDhcpClient *self,
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GError **error);
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gboolean (*decline) (NMDhcpClient *self,
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const char *error_message,
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GError **error);
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gboolean (*ip6_start) (NMDhcpClient *self,
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const char *anycast_addr,
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const struct in6_addr *ll_addr,
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@ -155,6 +162,13 @@ gboolean nm_dhcp_client_start_ip6 (NMDhcpClient *self,
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guint needed_prefixes,
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GError **error);
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gboolean nm_dhcp_client_accept (NMDhcpClient *self,
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GError **error);
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gboolean nm_dhcp_client_decline (NMDhcpClient *self,
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const char *error_message,
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GError **error);
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void nm_dhcp_client_stop (NMDhcpClient *self, gboolean release);
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/* Backend helpers for subclasses */
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