From 6bcc6a45573f387fa6c1682069da7ee9036cabe2 Mon Sep 17 00:00:00 2001 From: Neale Ranns Date: Tue, 15 Oct 2019 15:47:55 +0000 Subject: dhcp: fix crash on unicast renewal send Type: fix - when the addresses were learnt a copy of the client was sent to the main thread, this meant the unicast adjacecny was saved on the copy not on the original. - Add logging. - Improve the proxy-node that hands the clint packets so the DHCP packets are traced. - allow a renewal to configure new address data Change-Id: I6ab0afcccbc4a1cdefdd1b8beeda8fc7ba20ec1f Signed-off-by: Neale Ranns --- src/plugins/dhcp/client.c | 474 ++++++++++++++++++++++++---------------------- 1 file changed, 244 insertions(+), 230 deletions(-) (limited to 'src/plugins/dhcp/client.c') diff --git a/src/plugins/dhcp/client.c b/src/plugins/dhcp/client.c index 800da3e504a..f38e3fdfa8d 100644 --- a/src/plugins/dhcp/client.c +++ b/src/plugins/dhcp/client.c @@ -19,10 +19,17 @@ #include #include +vlib_log_class_t dhcp_logger; + dhcp_client_main_t dhcp_client_main; -static u8 *format_dhcp_client_state (u8 * s, va_list * va); static vlib_node_registration_t dhcp_client_process_node; +#define DHCP_DBG(...) \ + vlib_log_debug (dhcp_logger, __VA_ARGS__); + +#define DHCP_INFO(...) \ + vlib_log_notice (dhcp_logger, __VA_ARGS__); + #define foreach_dhcp_sent_packet_stat \ _(DISCOVER, "DHCP discover packets sent") \ _(OFFER, "DHCP offer packets sent") \ @@ -52,15 +59,124 @@ static char *dhcp_client_process_stat_strings[] = { "DHCP unknown packets sent", }; +static u8 * +format_dhcp_client_state (u8 * s, va_list * va) +{ + dhcp_client_state_t state = va_arg (*va, dhcp_client_state_t); + char *str = "BOGUS!"; + + switch (state) + { +#define _(a) \ + case a: \ + str = #a; \ + break; + foreach_dhcp_client_state; +#undef _ + default: + break; + } + + s = format (s, "%s", str); + return s; +} + +static u8 * +format_dhcp_client (u8 * s, va_list * va) +{ + dhcp_client_main_t *dcm = va_arg (*va, dhcp_client_main_t *); + dhcp_client_t *c = va_arg (*va, dhcp_client_t *); + int verbose = va_arg (*va, int); + ip4_address_t *addr; + + s = format (s, "[%d] %U state %U installed %d", c - dcm->clients, + format_vnet_sw_if_index_name, dcm->vnet_main, c->sw_if_index, + format_dhcp_client_state, c->state, c->addresses_installed); + + if (0 != c->dscp) + s = format (s, " dscp %d", c->dscp); + + if (c->installed.leased_address.as_u32) + { + s = format (s, " addr %U/%d gw %U server %U", + format_ip4_address, &c->installed.leased_address, + c->installed.subnet_mask_width, + format_ip4_address, &c->installed.router_address, + format_ip4_address, &c->installed.dhcp_server); + + vec_foreach (addr, c->domain_server_address) + s = format (s, " dns %U", format_ip4_address, addr); + } + else + { + s = format (s, " no address"); + } + + if (verbose) + { + s = + format (s, + "\n lease: lifetime:%d renewal-interval:%d expires:%.2f (now:%.2f)", + c->lease_lifetime, c->lease_renewal_interval, + c->lease_expires, vlib_time_now (dcm->vlib_main)); + s = + format (s, "\n retry-count:%d, next-xmt:%.2f", c->retry_count, + c->next_transmit); + s = + format (s, "\n adjacencies:[unicast:%d broadcast:%d]", c->ai_ucast, + c->ai_bcast); + } + return s; +} + static void dhcp_client_acquire_address (dhcp_client_main_t * dcm, dhcp_client_t * c) { /* * Install any/all info gleaned from dhcp, right here */ - ip4_add_del_interface_address (dcm->vlib_main, c->sw_if_index, - (void *) &c->leased_address, - c->subnet_mask_width, 0 /*is_del */ ); + if (!c->addresses_installed) + { + ip4_add_del_interface_address (dcm->vlib_main, c->sw_if_index, + (void *) &c->learned.leased_address, + c->learned.subnet_mask_width, + 0 /*is_del */ ); + if (c->learned.router_address.as_u32) + { + fib_prefix_t all_0s = { + .fp_len = 0, + .fp_proto = FIB_PROTOCOL_IP4, + }; + ip46_address_t nh = { + .ip4 = c->learned.router_address, + }; + + /* *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* */ + } + if (c->learned.dhcp_server.as_u32) + { + ip46_address_t dst = { + .ip4 = c->learned.dhcp_server, + }; + c->ai_ucast = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4, + VNET_LINK_IP4, &dst, + c->sw_if_index); + } + } + clib_memcpy (&c->installed, &c->learned, sizeof (c->installed)); + c->addresses_installed = 1; } static void @@ -70,10 +186,35 @@ dhcp_client_release_address (dhcp_client_main_t * dcm, dhcp_client_t * c) * Remove any/all info gleaned from dhcp, right here. Caller(s) * have not wiped out the info yet. */ + if (c->addresses_installed) + { + ip4_add_del_interface_address (dcm->vlib_main, c->sw_if_index, + (void *) &c->installed.leased_address, + c->installed.subnet_mask_width, + 1 /*is_del */ ); - ip4_add_del_interface_address (dcm->vlib_main, c->sw_if_index, - (void *) &c->leased_address, - c->subnet_mask_width, 1 /*is_del */ ); + /* Remove the default route */ + if (c->installed.router_address.as_u32) + { + fib_prefix_t all_0s = { + .fp_len = 0, + .fp_proto = FIB_PROTOCOL_IP4, + }; + ip46_address_t nh = { + .ip4 = c->installed.router_address, + }; + + fib_table_entry_path_remove (fib_table_get_index_for_sw_if_index + (FIB_PROTOCOL_IP4, c->sw_if_index), + &all_0s, FIB_SOURCE_DHCP, + DPO_PROTO_IP4, &nh, c->sw_if_index, ~0, + 1, FIB_ROUTE_PATH_FLAG_NONE); + } + adj_unlock (c->ai_ucast); + c->ai_ucast = ADJ_INDEX_INVALID; + } + clib_memset (&c->installed, 0, sizeof (c->installed)); + c->addresses_installed = 0; } static void @@ -86,9 +227,12 @@ dhcp_client_proc_callback (uword * client_index) } static void -dhcp_client_addr_callback (dhcp_client_t * c) +dhcp_client_addr_callback (u32 * cindex) { dhcp_client_main_t *dcm = &dhcp_client_main; + dhcp_client_t *c; + + c = pool_elt_at_index (dcm->clients, *cindex); /* disable the feature */ vnet_feature_enable_disable ("ip4-unicast", @@ -96,48 +240,11 @@ dhcp_client_addr_callback (dhcp_client_t * c) c->sw_if_index, 0 /* disable */ , 0, 0); c->client_detect_feature_enabled = 0; - /* if renewing the lease, the address and route have already been added */ - if (c->state == DHCP_BOUND) - return; - - /* add the address to the interface */ - dhcp_client_acquire_address (dcm, c); - - /* - * Configure default IP route: - */ - if (c->router_address.as_u32) - { - fib_prefix_t all_0s = { - .fp_len = 0, - .fp_addr.ip4.as_u32 = 0x0, - .fp_proto = FIB_PROTOCOL_IP4, - }; - ip46_address_t nh = { - .ip4 = c->router_address, - }; - - /* *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* */ - } - if (c->dhcp_server.as_u32) + /* add the address to the interface if they've changed since the last time */ + if (0 != clib_memcmp (&c->installed, &c->learned, sizeof (c->learned))) { - ip46_address_t dst = { - .ip4 = c->dhcp_server, - }; - c->ai_ucast = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4, - VNET_LINK_IP4, &dst, c->sw_if_index); + dhcp_client_release_address (dcm, c); + dhcp_client_acquire_address (dcm, c); } /* @@ -145,6 +252,28 @@ dhcp_client_addr_callback (dhcp_client_t * c) */ if (c->event_callback) c->event_callback (c->client_index, c); + + DHCP_INFO ("update: %U", format_dhcp_client, dcm, c); +} + +static void +dhcp_client_reset (dhcp_client_main_t * dcm, dhcp_client_t * c) +{ + if (c->client_detect_feature_enabled == 1) + { + vnet_feature_enable_disable ("ip4-unicast", + "ip4-dhcp-client-detect", + c->sw_if_index, 0, 0, 0); + c->client_detect_feature_enabled = 0; + } + + dhcp_client_release_address (dcm, c); + clib_memset (&c->learned, 0, sizeof (c->installed)); + c->state = DHCP_DISCOVER; + c->next_transmit = vlib_time_now (dcm->vlib_main); + c->retry_count = 0; + c->lease_renewal_interval = 0; + vec_free (c->domain_server_address); } /* @@ -194,9 +323,9 @@ dhcp_client_for_us (u32 bi, vlib_buffer_t * b, /* parse through the packet, learn what we can */ if (dhcp->your_ip_address.as_u32) - c->leased_address.as_u32 = dhcp->your_ip_address.as_u32; + c->learned.leased_address.as_u32 = dhcp->your_ip_address.as_u32; - c->dhcp_server.as_u32 = dhcp->server_ip_address.as_u32; + c->learned.dhcp_server.as_u32 = dhcp->server_ip_address.as_u32; o = (dhcp_option_t *) dhcp->options; @@ -230,19 +359,19 @@ dhcp_client_for_us (u32 bi, vlib_buffer_t * b, break; case 54: /* dhcp server address */ - c->dhcp_server.as_u32 = o->data_as_u32[0]; + c->learned.dhcp_server.as_u32 = o->data_as_u32[0]; break; case 1: /* subnet mask */ { u32 subnet_mask = clib_host_to_net_u32 (o->data_as_u32[0]); - c->subnet_mask_width = count_set_bits (subnet_mask); + c->learned.subnet_mask_width = count_set_bits (subnet_mask); } break; case 3: /* router address */ { u32 router_address = o->data_as_u32[0]; - c->router_address.as_u32 = router_address; + c->learned.router_address.as_u32 = router_address; } break; case 6: /* domain server address */ @@ -297,29 +426,9 @@ dhcp_client_for_us (u32 bi, vlib_buffer_t * b, { vlib_node_increment_counter (vm, dhcp_client_process_node.index, DHCP_STAT_NAK, 1); - /* Probably never happens in bound state, but anyhow... */ - if (c->state == DHCP_BOUND) - { - ip4_add_del_interface_address (dcm->vlib_main, c->sw_if_index, - (void *) &c->leased_address, - c->subnet_mask_width, - 1 /*is_del */ ); - vnet_feature_enable_disable ("ip4-unicast", - "ip4-dhcp-client-detect", - c->sw_if_index, 1 /* enable */ , - 0, 0); - c->client_detect_feature_enabled = 1; - } - /* Wipe out any memory of the address we had... */ - c->state = DHCP_DISCOVER; - c->next_transmit = now; - c->retry_count = 0; - c->leased_address.as_u32 = 0; - c->subnet_mask_width = 0; - c->router_address.as_u32 = 0; - c->lease_renewal_interval = 0; - c->dhcp_server.as_u32 = 0; - vec_free (c->domain_server_address); + /* Probably never happens in bound state, but anyhow... + Wipe out any memory of the address we had... */ + dhcp_client_reset (dcm, c); break; } @@ -335,8 +444,13 @@ dhcp_client_for_us (u32 bi, vlib_buffer_t * b, break; } /* OK, we own the address (etc), add to the routing table(s) */ - vl_api_rpc_call_main_thread (dhcp_client_addr_callback, - (u8 *) c, sizeof (*c)); + { + /* Send the index over to the main thread, where it can retrieve + * the original client */ + u32 cindex = c - dcm->clients; + vl_api_force_rpc_call_main_thread (dhcp_client_addr_callback, + (u8 *) & cindex, sizeof (u32)); + } c->state = DHCP_BOUND; c->retry_count = 0; @@ -351,8 +465,7 @@ dhcp_client_for_us (u32 bi, vlib_buffer_t * b, break; } - /* drop the pkt, return 1 */ - vlib_buffer_free (vm, &bi, 1); + /* return 1 so the call disposes of this packet */ return 1; } @@ -377,6 +490,10 @@ send_dhcp_pkt (dhcp_client_main_t * dcm, dhcp_client_t * c, u16 udp_length, ip_length; u32 counter_index, node_index; + DHCP_INFO ("send: type:%U bcast:%d %U", + format_dhcp_packet_type, type, + is_broadcast, format_dhcp_client, dcm, c); + /* Interface(s) down? */ if ((hw->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) == 0) return; @@ -400,6 +517,9 @@ send_dhcp_pkt (dhcp_client_main_t * dcm, dhcp_client_t * c, vnet_buffer (b)->sw_if_index[VLIB_RX] = c->sw_if_index; + if (ADJ_INDEX_INVALID == c->ai_ucast) + is_broadcast = 1; + if (is_broadcast) { node_index = ip4_rewrite_node.index; @@ -456,8 +576,8 @@ send_dhcp_pkt (dhcp_client_main_t * dcm, dhcp_client_t * c, else { /* Renewing an active lease, plain old ip4 src/dst */ - ip->src_address.as_u32 = c->leased_address.as_u32; - ip->dst_address.as_u32 = c->dhcp_server.as_u32; + ip->src_address.as_u32 = c->learned.leased_address.as_u32; + ip->dst_address.as_u32 = c->learned.dhcp_server.as_u32; } udp->src_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_client); @@ -473,7 +593,7 @@ send_dhcp_pkt (dhcp_client_main_t * dcm, dhcp_client_t * c, /* Lease renewal, set up client_ip_address */ if (is_broadcast == 0) - dhcp->client_ip_address.as_u32 = c->leased_address.as_u32; + dhcp->client_ip_address.as_u32 = c->learned.leased_address.as_u32; dhcp->opcode = 1; /* request, all we send */ dhcp->hardware_type = 1; /* ethernet */ @@ -508,20 +628,20 @@ send_dhcp_pkt (dhcp_client_main_t * dcm, dhcp_client_t * c, * If server ip address is available with non-zero value, * option 54 (DHCP Server Identifier) is sent. */ - if (c->dhcp_server.as_u32) + if (c->learned.dhcp_server.as_u32) { o->option = 54; o->length = 4; - clib_memcpy (o->data, &c->dhcp_server.as_u32, 4); + clib_memcpy (o->data, &c->learned.dhcp_server.as_u32, 4); o = (dhcp_option_t *) (((uword) o) + (o->length + 2)); } /* send option 50, requested IP address */ - if (c->leased_address.as_u32) + if (c->learned.leased_address.as_u32) { o->option = 50; o->length = 4; - clib_memcpy (o->data, &c->leased_address.as_u32, 4); + clib_memcpy (o->data, &c->learned.leased_address.as_u32, 4); o = (dhcp_option_t *) (((uword) o) + (o->length + 2)); } @@ -594,7 +714,17 @@ dhcp_discover_state (dhcp_client_main_t * dcm, dhcp_client_t * c, f64 now) * State machine "DISCOVER" state. Send a dhcp discover packet, * eventually back off the retry rate. */ + DHCP_INFO ("enter discover: %U", format_dhcp_client, dcm, c); + /* + * 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 + */ if (c->client_detect_feature_enabled == 0) { vnet_feature_enable_disable ("ip4-unicast", @@ -620,6 +750,8 @@ dhcp_request_state (dhcp_client_main_t * dcm, dhcp_client_t * c, f64 now) * State machine "REQUEST" state. Send a dhcp request packet, * eventually drop back to the discover state. */ + DHCP_INFO ("enter request: %U", format_dhcp_client, dcm, c); + send_dhcp_pkt (dcm, c, DHCP_PACKET_REQUEST, 1 /* is_broadcast */ ); c->retry_count++; @@ -637,13 +769,6 @@ dhcp_request_state (dhcp_client_main_t * dcm, dhcp_client_t * c, f64 now) static int dhcp_bound_state (dhcp_client_main_t * dcm, dhcp_client_t * c, f64 now) { - /* - * State machine "BOUND" state. Send a dhcp request packet to renew - * the lease. - * Eventually, when the lease expires, forget the dhcp data - * and go back to the stone age. - */ - /* * We disable the client detect feature when we bind a * DHCP address. Turn it back on again on first renew attempt. @@ -657,6 +782,23 @@ dhcp_bound_state (dhcp_client_main_t * dcm, dhcp_client_t * c, f64 now) c->client_detect_feature_enabled = 1; } + /* + * State machine "BOUND" state. Send a dhcp request packet to renew + * the lease. + * Eventually, when the lease expires, forget the dhcp data + * and go back to the stone age. + */ + if (now > c->lease_expires) + { + DHCP_INFO ("lease expired: %U", format_dhcp_client, dcm, c); + + /* reset all data for the client. do not send any more messages + * since the objects to do so have been lost */ + dhcp_client_reset (dcm, c); + return 1; + } + + DHCP_INFO ("enter bound: %U", format_dhcp_client, dcm, c); send_dhcp_pkt (dcm, c, DHCP_PACKET_REQUEST, 0 /* is_broadcast */ ); c->retry_count++; @@ -665,39 +807,6 @@ dhcp_bound_state (dhcp_client_main_t * dcm, dhcp_client_t * c, f64 now) else c->next_transmit = now + 1.0; - if (now > c->lease_expires) - { - /* Remove the default route */ - if (c->router_address.as_u32) - { - fib_prefix_t all_0s = { - .fp_len = 0, - .fp_addr.ip4.as_u32 = 0x0, - .fp_proto = FIB_PROTOCOL_IP4, - }; - ip46_address_t nh = { - .ip4 = c->router_address, - }; - - fib_table_entry_path_remove (fib_table_get_index_for_sw_if_index - (FIB_PROTOCOL_IP4, c->sw_if_index), - &all_0s, FIB_SOURCE_DHCP, - DPO_PROTO_IP4, &nh, c->sw_if_index, ~0, - 1, FIB_ROUTE_PATH_FLAG_NONE); - } - /* Remove the interface address */ - dhcp_client_release_address (dcm, c); - c->state = DHCP_DISCOVER; - c->next_transmit = now; - c->retry_count = 0; - /* Wipe out any memory of the address we had... */ - c->leased_address.as_u32 = 0; - c->subnet_mask_width = 0; - c->router_address.as_u32 = 0; - c->lease_renewal_interval = 0; - c->dhcp_server.as_u32 = 0; - return 1; - } return 0; } @@ -776,6 +885,7 @@ dhcp_client_process (vlib_main_t * vm, case ~0: /* *INDENT-OFF* */ + DHCP_INFO ("timeout"); pool_foreach (c, dcm->clients, ({ timeout = dhcp_client_sm (now, timeout, @@ -805,75 +915,6 @@ VLIB_REGISTER_NODE (dhcp_client_process_node,static) = { }; /* *INDENT-ON* */ -static u8 * -format_dhcp_client_state (u8 * s, va_list * va) -{ - dhcp_client_state_t state = va_arg (*va, dhcp_client_state_t); - char *str = "BOGUS!"; - - switch (state) - { -#define _(a) \ - case a: \ - str = #a; \ - break; - foreach_dhcp_client_state; -#undef _ - default: - break; - } - - s = format (s, "%s", str); - return s; -} - -static u8 * -format_dhcp_client (u8 * s, va_list * va) -{ - dhcp_client_main_t *dcm = va_arg (*va, dhcp_client_main_t *); - dhcp_client_t *c = va_arg (*va, dhcp_client_t *); - int verbose = va_arg (*va, int); - ip4_address_t *addr; - - s = format (s, "[%d] %U state %U ", c - dcm->clients, - format_vnet_sw_if_index_name, dcm->vnet_main, c->sw_if_index, - format_dhcp_client_state, c->state); - - if (0 != c->dscp) - s = format (s, "dscp %d ", c->dscp); - - if (c->leased_address.as_u32) - { - s = format (s, "addr %U/%d gw %U", - format_ip4_address, &c->leased_address, - c->subnet_mask_width, format_ip4_address, - &c->router_address); - - vec_foreach (addr, c->domain_server_address) - s = format (s, " dns %U", format_ip4_address, addr); - } - else - { - s = format (s, "no address\n"); - } - - if (verbose) - { - s = - format (s, - "\n lease: lifetime:%d renewal-interval:%d expires:%.2f (now:%.2f)", - c->lease_lifetime, c->lease_renewal_interval, - c->lease_expires, vlib_time_now (dcm->vlib_main)); - s = - format (s, "\n retry-count:%d, next-xmt:%.2f", c->retry_count, - c->next_transmit); - s = - format (s, "\n adjacencies:[unicast:%d broadcast:%d]", c->ai_ucast, - c->ai_bcast); - } - return s; -} - static clib_error_t * show_dhcp_client_command_fn (vlib_main_t * vm, unformat_input_t * input, @@ -934,11 +975,6 @@ dhcp_client_add_del (dhcp_client_add_del_args_t * a) vlib_main_t *vm = dcm->vlib_main; dhcp_client_t *c; uword *p; - fib_prefix_t all_0s = { - .fp_len = 0, - .fp_addr.ip4.as_u32 = 0x0, - .fp_proto = FIB_PROTOCOL_IP4, - }; p = hash_get (dcm->client_by_sw_if_index, a->sw_if_index); @@ -973,42 +1009,17 @@ dhcp_client_add_del (dhcp_client_add_del_args_t * a) hash_set (dcm->client_by_sw_if_index, a->sw_if_index, c - dcm->clients); - /* - * 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 - */ - vnet_feature_enable_disable ("ip4-unicast", - "ip4-dhcp-client-detect", - c->sw_if_index, 1 /* enable */ , 0, 0); - c->client_detect_feature_enabled = 1; - vlib_process_signal_event (vm, dhcp_client_process_node.index, EVENT_DHCP_CLIENT_WAKEUP, c - dcm->clients); + + DHCP_INFO ("create: %U", format_dhcp_client, dcm, c); } else { c = pool_elt_at_index (dcm->clients, p[0]); - if (c->router_address.as_u32) - { - ip46_address_t nh = { - .ip4 = c->router_address, - }; + dhcp_client_reset (dcm, c); - fib_table_entry_path_remove (fib_table_get_index_for_sw_if_index - (FIB_PROTOCOL_IP4, c->sw_if_index), - &all_0s, FIB_SOURCE_DHCP, - DPO_PROTO_IP4, &nh, c->sw_if_index, ~0, - 1, FIB_ROUTE_PATH_FLAG_NONE); - } - dhcp_client_release_address (dcm, c); - - adj_unlock (c->ai_ucast); adj_unlock (c->ai_bcast); vec_free (c->domain_server_address); @@ -1241,6 +1252,9 @@ dhcp_client_init (vlib_main_t * vm) dcm->vlib_main = vm; dcm->vnet_main = vnet_get_main (); dcm->seed = (u32) clib_cpu_time_now (); + + dhcp_logger = vlib_log_register_class ("dhcp", "client"); + return 0; } -- cgit 1.2.3-korg