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authorDave Barach <dave@barachs.net>2019-11-08 20:20:17 -0500
committerFlorin Coras <florin.coras@gmail.com>2019-11-09 17:28:14 +0000
commit20b962d3e494513ab28854936cc8bbc32891686b (patch)
tree46e5b006f7e5768dc0033a257a44529b00725a57
parent3c80c106a88f18523b7edaeaa8acf5728fd72ec3 (diff)
dhcp: fix dhcpv6 client and dhcpv6 prefix delegation
Keep trying even if the interface in question is not "admin-up, link-up." In real life, it's normal for link autonegotiation to take a good fraction of a second. The driver layer takes care of packets sent to an interface which can't transmit at the moment. Renew address leases at the preferred renewal time, not at the expiration time. Type: fix Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: I68ec1c52cc1f4a8aa256185820748b845e92f7c1
-rw-r--r--src/plugins/dhcp/dhcp6_ia_na_client_cp.c12
-rw-r--r--src/plugins/dhcp/dhcp6_ia_na_client_dp.c14
-rw-r--r--src/plugins/dhcp/dhcp6_pd_client_dp.c30
3 files changed, 19 insertions, 37 deletions
diff --git a/src/plugins/dhcp/dhcp6_ia_na_client_cp.c b/src/plugins/dhcp/dhcp6_ia_na_client_cp.c
index 2d4135d7ebd..b87ad2139ed 100644
--- a/src/plugins/dhcp/dhcp6_ia_na_client_cp.c
+++ b/src/plugins/dhcp/dhcp6_ia_na_client_cp.c
@@ -302,7 +302,11 @@ dhcp6_reply_event_handler (vl_api_dhcp6_reply_event_t * mp)
{
address_info->preferred_lt = preferred_time;
address_info->valid_lt = valid_time;
- address_info->due_time = current_time + valid_time;
+ address_info->due_time = current_time;
+ /* Renew the lease at the preferred time, if non-zero */
+ address_info->due_time += (preferred_time > 0) ?
+ preferred_time : valid_time;
+
if (address_info->due_time > rm->max_valid_due_time)
rm->max_valid_due_time = address_info->due_time;
continue;
@@ -316,7 +320,11 @@ dhcp6_reply_event_handler (vl_api_dhcp6_reply_event_t * mp)
address_info->address = *address;
address_info->preferred_lt = preferred_time;
address_info->valid_lt = valid_time;
- address_info->due_time = current_time + valid_time;
+ address_info->due_time = current_time;
+ /* Renew the lease at the preferred time, if non-zero */
+ address_info->due_time += (preferred_time > 0) ?
+ preferred_time : valid_time;
+
if (address_info->due_time > rm->max_valid_due_time)
rm->max_valid_due_time = address_info->due_time;
rm->client_state_by_sw_if_index[sw_if_index].address_count++;
diff --git a/src/plugins/dhcp/dhcp6_ia_na_client_dp.c b/src/plugins/dhcp/dhcp6_ia_na_client_dp.c
index 6ea822fff48..8ad7d765f69 100644
--- a/src/plugins/dhcp/dhcp6_ia_na_client_dp.c
+++ b/src/plugins/dhcp/dhcp6_ia_na_client_dp.c
@@ -84,8 +84,6 @@ create_buffer_for_client_message (vlib_main_t * vm, u32 sw_if_index,
u32 type)
{
dhcp6_client_common_main_t *ccm = &dhcp6_client_common_main;
- vnet_main_t *vnm = vnet_get_main ();
-
vlib_buffer_t *b;
u32 bi;
ip6_header_t *ip;
@@ -97,18 +95,6 @@ create_buffer_for_client_message (vlib_main_t * vm, u32 sw_if_index,
u32 n_addresses;
u32 i;
- vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
- vnet_sw_interface_t *sup_sw = vnet_get_sup_sw_interface (vnm, sw_if_index);
- vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
-
- /* Interface(s) down? */
- if ((hw->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
- return NULL;
- if ((sup_sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0)
- return NULL;
- if ((sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0)
- return NULL;
-
/* Get a link-local address */
src_addr = ip6_neighbor_get_link_local_address (sw_if_index);
diff --git a/src/plugins/dhcp/dhcp6_pd_client_dp.c b/src/plugins/dhcp/dhcp6_pd_client_dp.c
index 74a1f16000c..7896e9a6403 100644
--- a/src/plugins/dhcp/dhcp6_pd_client_dp.c
+++ b/src/plugins/dhcp/dhcp6_pd_client_dp.c
@@ -85,8 +85,6 @@ create_buffer_for_client_message (vlib_main_t * vm,
* client_state, u32 type)
{
dhcp6_client_common_main_t *ccm = &dhcp6_client_common_main;
- vnet_main_t *vnm = vnet_get_main ();
-
vlib_buffer_t *b;
u32 bi;
ip6_header_t *ip;
@@ -98,17 +96,10 @@ create_buffer_for_client_message (vlib_main_t * vm,
u32 n_prefixes;
u32 i;
- vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
- vnet_sw_interface_t *sup_sw = vnet_get_sup_sw_interface (vnm, sw_if_index);
- vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
-
- /* Interface(s) down? */
- if ((hw->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
- return NULL;
- if ((sup_sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0)
- return NULL;
- if ((sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0)
- return NULL;
+ /*
+ * Note: do NOT psychoanalyze link-state here.
+ * If the interface is down, let the driver turf the packet.
+ */
/* Get a link-local address */
src_addr = ip6_neighbor_get_link_local_address (sw_if_index);
@@ -298,10 +289,10 @@ check_pd_send_client_message (vlib_main_t * vm,
else
{
client_state->sleep_interval =
- (2 + random_f64_from_to (-0.1, 0.1)) * client_state->sleep_interval;
+ (2.0 + random_f64_from_to (-0.1, 0.1)) * client_state->sleep_interval;
if (client_state->sleep_interval > params->mrt)
client_state->sleep_interval =
- (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
+ (1.0 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
client_state->due_time = current_time + client_state->sleep_interval;
@@ -404,12 +395,9 @@ dhcp6_pd_send_client_message (vlib_main_t * vm, u32 sw_if_index, u8 stop,
client_state->buffer =
create_buffer_for_client_message (vm, sw_if_index, client_state,
params->msg_type);
- if (!client_state->buffer)
- client_state->keep_sending_client_message = 0;
- else
- vlib_process_signal_event (vm,
- send_dhcp6_pd_client_message_process_node.index,
- 1, 0);
+ if (client_state->buffer)
+ vlib_process_signal_event
+ (vm, send_dhcp6_pd_client_message_process_node.index, 1, 0);
}
}