static u8 *format_dhcp_client_state (u8 * s, va_list * va);
static vlib_node_registration_t dhcp_client_process_node;
-static void
-dhcp_client_add_rx_address (dhcp_client_main_t * dcm, dhcp_client_t * c)
-{
- /* Install a local entry for the offered address */
- fib_prefix_t rx = {
- .fp_len = 32,
- .fp_addr.ip4 = c->leased_address,
- .fp_proto = FIB_PROTOCOL_IP4,
- };
-
- fib_table_entry_special_add (fib_table_get_index_for_sw_if_index
- (FIB_PROTOCOL_IP4, c->sw_if_index), &rx,
- FIB_SOURCE_DHCP, (FIB_ENTRY_FLAG_LOCAL));
-
- /* And add the server's address as uRPF exempt so we can accept
- * local packets from it */
- fib_prefix_t server = {
- .fp_len = 32,
- .fp_addr.ip4 = c->dhcp_server,
- .fp_proto = FIB_PROTOCOL_IP4,
- };
-
- fib_table_entry_special_add (fib_table_get_index_for_sw_if_index
- (FIB_PROTOCOL_IP4, c->sw_if_index), &server,
- FIB_SOURCE_URPF_EXEMPT, (FIB_ENTRY_FLAG_DROP));
-}
-
-static void
-dhcp_client_remove_rx_address (dhcp_client_main_t * dcm, dhcp_client_t * c)
-{
- fib_prefix_t rx = {
- .fp_len = 32,
- .fp_addr.ip4 = c->leased_address,
- .fp_proto = FIB_PROTOCOL_IP4,
- };
-
- fib_table_entry_special_remove (fib_table_get_index_for_sw_if_index
- (FIB_PROTOCOL_IP4, c->sw_if_index), &rx,
- FIB_SOURCE_DHCP);
- fib_prefix_t server = {
- .fp_len = 32,
- .fp_addr.ip4 = c->dhcp_server,
- .fp_proto = FIB_PROTOCOL_IP4,
- };
-
- fib_table_entry_special_remove (fib_table_get_index_for_sw_if_index
- (FIB_PROTOCOL_IP4, c->sw_if_index), &server,
- FIB_SOURCE_URPF_EXEMPT);
-}
-
static void
dhcp_client_acquire_address (dhcp_client_main_t * dcm, dhcp_client_t * c)
{
c->next_transmit = now + 5.0;
break;
}
- /*
- * in order to accept unicasted ACKs we need to configure the offered
- * address on the interface. However, at this point we may not know the
- * subnet-mask (an OFFER may not contain it). So add a temporary receice
- * and uRPF excempt entry
- */
- dhcp_client_add_rx_address (dcm, c);
/* Received an offer, go send a request */
c->state = DHCP_REQUEST;
void (*fp) (u32, u32, u8 *, u8, u8, u8 *, u8 *, u8 *) =
c->event_callback;
- /* replace the temporary RX address with the correct subnet */
- dhcp_client_remove_rx_address (dcm, c);
+ /* add the advertised subnet and disable the feature */
dhcp_client_acquire_address (dcm, c);
+ vnet_feature_enable_disable ("ip4-unicast",
+ "ip4-dhcp-client-detect",
+ c->sw_if_index, 0, 0, 0);
/*
* Configure default IP route:
.ip4 = c->router_address,
};
- fib_table_entry_path_add (fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, c->sw_if_index), &all_0s, FIB_SOURCE_DHCP, FIB_ENTRY_FLAG_NONE, DPO_PROTO_IP4, &nh, c->sw_if_index, ~0, 1, NULL, // no label stack
- FIB_ROUTE_PATH_FLAG_NONE);
+ /* *INDENT-OFF* */
+ fib_table_entry_path_add (
+ fib_table_get_index_for_sw_if_index (
+ FIB_PROTOCOL_IP4,
+ c->sw_if_index),
+ &all_0s,
+ FIB_SOURCE_DHCP,
+ FIB_ENTRY_FLAG_NONE,
+ DPO_PROTO_IP4,
+ &nh, c->sw_if_index,
+ ~0, 1, NULL, // no label stack
+ FIB_ROUTE_PATH_FLAG_NONE);
+ /* *INDENT-ON* */
}
/*
dhcp->hardware_type = 1; /* ethernet */
dhcp->hardware_address_length = 6;
dhcp->transaction_identifier = c->transaction_id;
- dhcp->flags = clib_host_to_net_u16 (is_broadcast ? DHCP_FLAG_BROADCAST : 0);
+ dhcp->flags =
+ clib_host_to_net_u16 (is_broadcast && c->set_broadcast_flag ?
+ DHCP_FLAG_BROADCAST : 0);
dhcp->magic_cookie.as_u32 = DHCP_MAGIC;
o = (dhcp_option_t *) dhcp->options;
break;
case ~0:
- pool_foreach (c, dcm->clients, (
- {
- timeout =
- dhcp_client_sm (now, timeout,
- (uword) (c -
- dcm->clients));
- }
- ));
+ /* *INDENT-OFF* */
+ pool_foreach (c, dcm->clients,
+ ({
+ timeout = dhcp_client_sm (now, timeout,
+ (uword) (c - dcm->clients));
+ }));
+ /* *INDENT-ON* */
if (pool_elts (dcm->clients) == 0)
timeout = 100.0;
break;
return 0;
}
- pool_foreach (c, dcm->clients, (
- {
- vlib_cli_output (vm, "%U",
- format_dhcp_client, dcm,
- c, verbose);
- }
- ));
+ /* *INDENT-OFF* */
+ pool_foreach (c, dcm->clients,
+ ({
+ vlib_cli_output (vm, "%U",
+ format_dhcp_client, dcm,
+ c, verbose);
+ }));
+ /* *INDENT-ON* */
return 0;
}
vlib_main_t *vm = dcm->vlib_main;
dhcp_client_t *c;
uword *p;
- fib_prefix_t all_1s = {
- .fp_len = 32,
- .fp_addr.ip4.as_u32 = 0xffffffff,
- .fp_proto = FIB_PROTOCOL_IP4,
- };
fib_prefix_t all_0s = {
.fp_len = 0,
.fp_addr.ip4.as_u32 = 0x0,
c->option_55_data = a->option_55_data;
c->hostname = a->hostname;
c->client_identifier = a->client_identifier;
+ c->set_broadcast_flag = a->set_broadcast_flag;
do
{
c->transaction_id = random_u32 (&dcm->seed);
set_l2_rewrite (dcm, c);
hash_set (dcm->client_by_sw_if_index, a->sw_if_index, c - dcm->clients);
- /* this add is ref counted by FIB so we can add for each itf */
- fib_table_entry_special_add (fib_table_get_index_for_sw_if_index
- (FIB_PROTOCOL_IP4, c->sw_if_index),
- &all_1s, FIB_SOURCE_DHCP,
- FIB_ENTRY_FLAG_LOCAL);
-
/*
- * enable the interface to RX IPv4 packets
- * this is also ref counted
+ * In order to accept any OFFER, whether broadcasted or unicasted, we
+ * need to configure the dhcp-client-detect feature as an input feature
+ * so the DHCP OFFER is sent to the ip4-local node. Without this a
+ * broadcasted OFFER hits the 255.255.255.255/32 address and a unicast
+ * hits 0.0.0.0/0 both of which default to drop and the latter may forward
+ * of box - not what we want. Nor to we want to change these route for
+ * all interfaces in this table
*/
- ip4_sw_interface_enable_disable (c->sw_if_index, 1);
+ vnet_feature_enable_disable ("ip4-unicast",
+ "ip4-dhcp-client-detect",
+ c->sw_if_index, 1, 0, 0);
vlib_process_signal_event (vm, dhcp_client_process_node.index,
EVENT_DHCP_CLIENT_WAKEUP, c - dcm->clients);
{
c = pool_elt_at_index (dcm->clients, p[0]);
- fib_table_entry_special_remove (fib_table_get_index_for_sw_if_index
- (FIB_PROTOCOL_IP4, c->sw_if_index),
- &all_1s, FIB_SOURCE_DHCP);
-
if (c->router_address.as_u32)
{
ip46_address_t nh = {
DPO_PROTO_IP4, &nh, c->sw_if_index, ~0,
1, FIB_ROUTE_PATH_FLAG_NONE);
}
- dhcp_client_remove_rx_address (dcm, c);
dhcp_client_release_address (dcm, c);
- ip4_sw_interface_enable_disable (c->sw_if_index, 0);
vec_free (c->option_55_data);
vec_free (c->hostname);
u8 * hostname,
u8 * client_id,
u32 is_add,
- u32 client_index, void *event_callback, u32 pid)
+ u32 client_index,
+ void *event_callback, u8 set_broadcast_flag, u32 pid)
{
dhcp_client_add_del_args_t _a, *a = &_a;
int rv;
a->client_index = client_index;
a->pid = pid;
a->event_callback = event_callback;
+ a->set_broadcast_flag = set_broadcast_flag;
vec_validate (a->hostname, strlen ((char *) hostname) - 1);
strncpy ((char *) a->hostname, (char *) hostname, vec_len (a->hostname));
vec_validate (a->client_identifier, strlen ((char *) client_id) - 1);
u32 sw_if_index;
u8 *hostname = 0;
u8 sw_if_index_set = 0;
+ u8 set_broadcast_flag = 1;
int is_add = 1;
dhcp_client_add_del_args_t _a, *a = &_a;
int rv;
;
else if (unformat (input, "del"))
is_add = 0;
+ else if (unformat (input, "broadcast", &set_broadcast_flag))
+ is_add = 0;
else
break;
}
a->sw_if_index = sw_if_index;
a->hostname = hostname;
a->client_identifier = format (0, "vpe 1.0%c", 0);
+ a->set_broadcast_flag = set_broadcast_flag;
/*
* Option 55 request list. These data precisely match
Code Review / vpp.git / blobdiff