+++ /dev/null
-/*
- * dhcp6_proxy_node.c: dhcpv6 proxy node processing
- *
- * Copyright (c) 2013 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <vlib/vlib.h>
-#include <vnet/pg/pg.h>
-#include <vnet/dhcp/dhcp_proxy.h>
-#include <vnet/dhcp/dhcp6_packet.h>
-#include <vnet/mfib/mfib_table.h>
-#include <vnet/mfib/ip6_mfib.h>
-#include <vnet/fib/fib.h>
-
-static char *dhcpv6_proxy_error_strings[] = {
-#define dhcpv6_proxy_error(n,s) s,
-#include <vnet/dhcp/dhcp6_proxy_error.def>
-#undef dhcpv6_proxy_error
-};
-
-#define foreach_dhcpv6_proxy_to_server_input_next \
- _ (DROP, "error-drop") \
- _ (LOOKUP, "ip6-lookup") \
- _ (SEND_TO_CLIENT, "dhcpv6-proxy-to-client")
-
-
-typedef enum
-{
-#define _(s,n) DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s,
- foreach_dhcpv6_proxy_to_server_input_next
-#undef _
- DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
-} dhcpv6_proxy_to_server_input_next_t;
-
-typedef struct
-{
- /* 0 => to server, 1 => to client */
- int which;
- u8 packet_data[64];
- u32 error;
- u32 sw_if_index;
- u32 original_sw_if_index;
-} dhcpv6_proxy_trace_t;
-
-static vlib_node_registration_t dhcpv6_proxy_to_server_node;
-static vlib_node_registration_t dhcpv6_proxy_to_client_node;
-
-/* all DHCP servers address */
-static ip6_address_t all_dhcpv6_server_address;
-static ip6_address_t all_dhcpv6_server_relay_agent_address;
-
-static u8 *
-format_dhcpv6_proxy_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- dhcpv6_proxy_trace_t *t = va_arg (*args, dhcpv6_proxy_trace_t *);
-
- if (t->which == 0)
- s = format (s, "DHCPV6 proxy: sent to server %U",
- format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
- else
- s = format (s, "DHCPV6 proxy: sent to client from %U",
- format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
- if (t->error != (u32) ~ 0)
- s = format (s, " error: %s\n", dhcpv6_proxy_error_strings[t->error]);
-
- s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
- t->original_sw_if_index, t->sw_if_index);
-
- return s;
-}
-
-static u8 *
-format_dhcpv6_proxy_header_with_length (u8 * s, va_list * args)
-{
- dhcpv6_header_t *h = va_arg (*args, dhcpv6_header_t *);
- u32 max_header_bytes = va_arg (*args, u32);
- u32 header_bytes;
-
- header_bytes = sizeof (h[0]);
- if (max_header_bytes != 0 && header_bytes > max_header_bytes)
- return format (s, "dhcpv6 header truncated");
-
- s = format (s, "DHCPV6 Proxy");
-
- return s;
-}
-
-/* get first interface address */
-static ip6_address_t *
-ip6_interface_first_global_or_site_address (ip6_main_t * im, u32 sw_if_index)
-{
- ip_lookup_main_t *lm = &im->lookup_main;
- ip_interface_address_t *ia = 0;
- ip6_address_t *result = 0;
-
- /* *INDENT-OFF* */
- foreach_ip_interface_address (lm, ia, sw_if_index,
- 1 /* honor unnumbered */,
- ({
- ip6_address_t * a = ip_interface_address_get_address (lm, ia);
- if ((a->as_u8[0] & 0xe0) == 0x20 ||
- (a->as_u8[0] & 0xfe) == 0xfc) {
- result = a;
- break;
- }
- }));
- /* *INDENT-ON* */
- return result;
-}
-
-static inline void
-copy_ip6_address (ip6_address_t * dst, ip6_address_t * src)
-{
- dst->as_u64[0] = src->as_u64[0];
- dst->as_u64[1] = src->as_u64[1];
-}
-
-static uword
-dhcpv6_proxy_to_server_input (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- u32 n_left_from, next_index, *from, *to_next;
- dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
- from = vlib_frame_vector_args (from_frame);
- n_left_from = from_frame->n_vectors;
- u32 pkts_to_server = 0, pkts_to_client = 0, pkts_no_server = 0;
- u32 pkts_no_interface_address = 0, pkts_no_exceeding_max_hop = 0;
- u32 pkts_no_src_address = 0;
- u32 pkts_wrong_msg_type = 0;
- u32 pkts_too_big = 0;
- ip6_main_t *im = &ip6_main;
- ip6_address_t *src;
- int bogus_length;
- dhcp_proxy_t *proxy;
- dhcp_server_t *server;
- u32 rx_fib_idx = 0, server_fib_idx = 0;
-
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- vnet_main_t *vnm = vnet_get_main ();
- u32 sw_if_index = 0;
- u32 rx_sw_if_index = 0;
- vnet_sw_interface_t *swif;
- u32 bi0;
- vlib_buffer_t *b0;
- udp_header_t *u0, *u1;
- dhcpv6_header_t *h0; // client msg hdr
- ip6_header_t *ip0, *ip1;
- ip6_address_t _ia0, *ia0 = &_ia0;
- u32 next0;
- u32 error0 = (u32) ~ 0;
- dhcpv6_option_t *fwd_opt;
- dhcpv6_relay_hdr_t *r1;
- u16 len;
- dhcpv6_int_id_t *id1;
- dhcpv6_vss_t *vss1;
- dhcpv6_client_mac_t *cmac; // client mac
- ethernet_header_t *e_h0;
- u8 client_src_mac[6];
- dhcp_vss_t *vss;
- u8 is_solicit = 0;
-
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- h0 = vlib_buffer_get_current (b0);
-
- /*
- * udp_local hands us the DHCPV6 header.
- */
- u0 = (void *) h0 - (sizeof (*u0));
- ip0 = (void *) u0 - (sizeof (*ip0));
- e_h0 = (void *) ip0 - ethernet_buffer_header_size (b0);
-
- clib_memcpy (client_src_mac, e_h0->src_address, 6);
-
- switch (h0->msg_type)
- {
- case DHCPV6_MSG_SOLICIT:
- case DHCPV6_MSG_REQUEST:
- case DHCPV6_MSG_CONFIRM:
- case DHCPV6_MSG_RENEW:
- case DHCPV6_MSG_REBIND:
- case DHCPV6_MSG_RELEASE:
- case DHCPV6_MSG_DECLINE:
- case DHCPV6_MSG_INFORMATION_REQUEST:
- case DHCPV6_MSG_RELAY_FORW:
- /* send to server */
- break;
- case DHCPV6_MSG_RELAY_REPL:
- /* send to client */
- next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
- error0 = 0;
- pkts_to_client++;
- goto do_enqueue;
- default:
- /* drop the packet */
- pkts_wrong_msg_type++;
- error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
- next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
- goto do_trace;
-
- }
-
- /* Send to DHCPV6 server via the configured FIB */
- rx_sw_if_index = sw_if_index =
- vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_idx = im->mfib_index_by_sw_if_index[rx_sw_if_index];
- proxy = dhcp_get_proxy (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
-
- if (PREDICT_FALSE (NULL == proxy))
- {
- error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
- next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
- pkts_no_server++;
- goto do_trace;
- }
-
- server = &proxy->dhcp_servers[0];
- server_fib_idx = server->server_fib_index;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = server_fib_idx;
-
-
- /* relay-option header pointer */
- vlib_buffer_advance (b0, -(sizeof (*fwd_opt)));
- fwd_opt = vlib_buffer_get_current (b0);
- /* relay message header pointer */
- vlib_buffer_advance (b0, -(sizeof (*r1)));
- r1 = vlib_buffer_get_current (b0);
-
- vlib_buffer_advance (b0, -(sizeof (*u1)));
- u1 = vlib_buffer_get_current (b0);
-
- vlib_buffer_advance (b0, -(sizeof (*ip1)));
- ip1 = vlib_buffer_get_current (b0);
-
- /* fill in all that rubbish... */
- len = clib_net_to_host_u16 (u0->length) - sizeof (udp_header_t);
- copy_ip6_address (&r1->peer_addr, &ip0->src_address);
-
- r1->msg_type = DHCPV6_MSG_RELAY_FORW;
- fwd_opt->length = clib_host_to_net_u16 (len);
- fwd_opt->option = clib_host_to_net_u16 (DHCPV6_OPTION_RELAY_MSG);
-
- r1->hop_count++;
- r1->hop_count =
- (h0->msg_type != DHCPV6_MSG_RELAY_FORW) ? 0 : r1->hop_count;
-
- if (PREDICT_FALSE (r1->hop_count >= HOP_COUNT_LIMIT))
- {
- error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
- next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
- pkts_no_exceeding_max_hop++;
- goto do_trace;
- }
-
-
- /* If relay-fwd and src address is site or global unicast address */
- if (h0->msg_type == DHCPV6_MSG_RELAY_FORW &&
- ((ip0->src_address.as_u8[0] & 0xe0) == 0x20 ||
- (ip0->src_address.as_u8[0] & 0xfe) == 0xfc))
- {
- /* Set link address to zero */
- r1->link_addr.as_u64[0] = 0;
- r1->link_addr.as_u64[1] = 0;
- goto link_address_set;
- }
-
- /* if receiving interface is unnumbered, use receiving interface
- * IP address as link address, otherwise use the loopback interface
- * IP address as link address.
- */
-
- swif = vnet_get_sw_interface (vnm, rx_sw_if_index);
- if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
- sw_if_index = swif->unnumbered_sw_if_index;
-
- ia0 =
- ip6_interface_first_global_or_site_address (&ip6_main,
- sw_if_index);
- if (ia0 == 0)
- {
- error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
- next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
- pkts_no_interface_address++;
- goto do_trace;
- }
-
- copy_ip6_address (&r1->link_addr, ia0);
-
- link_address_set:
-
- if ((b0->current_length + sizeof (*id1) + sizeof (*vss1) +
- sizeof (*cmac)) > vlib_buffer_get_default_data_size (vm))
- {
- error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
- next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
- pkts_too_big++;
- goto do_trace;
- }
-
- id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
- b0->current_length += (sizeof (*id1));
-
- id1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_INTERFACE_ID);
- id1->opt.length = clib_host_to_net_u16 (sizeof (rx_sw_if_index));
- id1->int_idx = clib_host_to_net_u32 (rx_sw_if_index);
-
- u1->length = 0;
- if (h0->msg_type != DHCPV6_MSG_RELAY_FORW)
- {
- cmac =
- (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
- b0->current_length += (sizeof (*cmac));
- cmac->opt.length = clib_host_to_net_u16 (sizeof (*cmac) -
- sizeof (cmac->opt));
- cmac->opt.option =
- clib_host_to_net_u16
- (DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
- cmac->link_type = clib_host_to_net_u16 (1); /* ethernet */
- clib_memcpy (cmac->data, client_src_mac, 6);
- u1->length += sizeof (*cmac);
- }
-
- vss = dhcp_get_vss_info (dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
-
- if (vss)
- {
- u16 id_len; /* length of VPN ID */
- u16 type_len = sizeof (vss1->vss_type);
-
- vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
- vss1->vss_type = vss->vss_type;
- if (vss->vss_type == VSS_TYPE_VPN_ID)
- {
- id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */
- memcpy (vss1->data, vss->vpn_id, id_len);
- }
- else if (vss->vss_type == VSS_TYPE_ASCII)
- {
- id_len = vec_len (vss->vpn_ascii_id);
- memcpy (vss1->data, vss->vpn_ascii_id, id_len);
- }
- else /* must be VSS_TYPE_DEFAULT, no VPN ID */
- id_len = 0;
-
- vss1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_VSS);
- vss1->opt.length = clib_host_to_net_u16 (type_len + id_len);
- u1->length += type_len + id_len + sizeof (vss1->opt);
- b0->current_length += type_len + id_len + sizeof (vss1->opt);
- }
-
- pkts_to_server++;
- u1->checksum = 0;
- u1->src_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_client);
- u1->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcpv6_to_server);
-
- u1->length =
- clib_host_to_net_u16 (clib_net_to_host_u16 (fwd_opt->length) +
- sizeof (*r1) + sizeof (*fwd_opt) +
- sizeof (*u1) + sizeof (*id1) + u1->length);
-
- clib_memset (ip1, 0, sizeof (*ip1));
- ip1->ip_version_traffic_class_and_flow_label = 0x60;
- ip1->payload_length = u1->length;
- ip1->protocol = PROTO_UDP;
- ip1->hop_limit = HOP_COUNT_LIMIT;
- src = ((server->dhcp_server.ip6.as_u64[0] ||
- server->dhcp_server.ip6.as_u64[1]) ?
- &server->dhcp_server.ip6 : &all_dhcpv6_server_address);
- copy_ip6_address (&ip1->dst_address, src);
-
-
- ia0 = ip6_interface_first_global_or_site_address
- (&ip6_main, vnet_buffer (b0)->sw_if_index[VLIB_RX]);
-
- src = (proxy->dhcp_src_address.ip6.as_u64[0] ||
- proxy->dhcp_src_address.ip6.as_u64[1]) ?
- &proxy->dhcp_src_address.ip6 : ia0;
- if (ia0 == 0)
- {
- error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
- next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
- pkts_no_src_address++;
- goto do_trace;
- }
-
- copy_ip6_address (&ip1->src_address, src);
-
-
- u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
- &bogus_length);
- ASSERT (bogus_length == 0);
-
- next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
-
- is_solicit = (DHCPV6_MSG_SOLICIT == h0->msg_type);
-
- /*
- * If we have multiple servers configured and this is the
- * client's discover message, then send copies to each of
- * those servers
- */
- if (is_solicit && vec_len (proxy->dhcp_servers) > 1)
- {
- u32 ii;
-
- for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
- {
- vlib_buffer_t *c0;
- u32 ci0;
-
- c0 = vlib_buffer_copy (vm, b0);
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (c0);
- ci0 = vlib_get_buffer_index (vm, c0);
- server = &proxy->dhcp_servers[ii];
-
- ip0 = vlib_buffer_get_current (c0);
-
- src = ((server->dhcp_server.ip6.as_u64[0] ||
- server->dhcp_server.ip6.as_u64[1]) ?
- &server->dhcp_server.ip6 :
- &all_dhcpv6_server_address);
- copy_ip6_address (&ip1->dst_address, src);
-
- to_next[0] = ci0;
- to_next += 1;
- n_left_to_next -= 1;
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- ci0, next0);
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- dhcpv6_proxy_trace_t *tr;
-
- tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
- tr->which = 0; /* to server */
- tr->error = error0;
- tr->original_sw_if_index = rx_sw_if_index;
- tr->sw_if_index = sw_if_index;
- if (next0 == DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
- copy_ip6_address ((ip6_address_t *) &
- tr->packet_data[0],
- &server->dhcp_server.ip6);
- }
-
- if (PREDICT_FALSE (0 == n_left_to_next))
- {
- vlib_put_next_frame (vm, node, next_index,
- n_left_to_next);
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
- }
- }
- }
-
- do_trace:
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
- b0, sizeof (*tr));
- tr->which = 0; /* to server */
- tr->error = error0;
- tr->original_sw_if_index = rx_sw_if_index;
- tr->sw_if_index = sw_if_index;
- if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
- copy_ip6_address ((ip6_address_t *) & tr->packet_data[0],
- &server->dhcp_server.ip6);
- }
-
- do_enqueue:
- to_next[0] = bi0;
- to_next += 1;
- n_left_to_next -= 1;
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
- DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
- pkts_to_client);
- vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
- DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
- pkts_to_server);
- vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
- DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
- pkts_no_interface_address);
- vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
- DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
- pkts_wrong_msg_type);
- vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
- DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
- pkts_no_src_address);
- vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
- DHCPV6_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
- return from_frame->n_vectors;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node, static) = {
- .function = dhcpv6_proxy_to_server_input,
- .name = "dhcpv6-proxy-to-server",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
-
- .n_errors = DHCPV6_PROXY_N_ERROR,
- .error_strings = dhcpv6_proxy_error_strings,
-
- .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
- foreach_dhcpv6_proxy_to_server_input_next
-#undef _
- },
-
- .format_buffer = format_dhcpv6_proxy_header_with_length,
- .format_trace = format_dhcpv6_proxy_trace,
-#if 0
- .unformat_buffer = unformat_dhcpv6_proxy_header,
-#endif
-};
-/* *INDENT-ON* */
-
-static uword
-dhcpv6_proxy_to_client_input (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
-
- u32 n_left_from, *from;
- ethernet_main_t *em = vnet_get_ethernet_main ();
- dhcp_proxy_main_t *dm = &dhcp_proxy_main;
- dhcp_proxy_t *proxy;
- dhcp_server_t *server;
- vnet_main_t *vnm = vnet_get_main ();
- int bogus_length;
-
- from = vlib_frame_vector_args (from_frame);
- n_left_from = from_frame->n_vectors;
-
- while (n_left_from > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- udp_header_t *u0, *u1 = 0;
- dhcpv6_relay_hdr_t *h0;
- ip6_header_t *ip1 = 0, *ip0;
- ip6_address_t _ia0, *ia0 = &_ia0;
- ip6_address_t client_address;
- ethernet_interface_t *ei0;
- ethernet_header_t *mac0;
- vnet_hw_interface_t *hi0;
- vlib_frame_t *f0;
- u32 *to_next0;
- u32 sw_if_index = ~0;
- u32 original_sw_if_index = ~0;
- vnet_sw_interface_t *si0;
- u32 error0 = (u32) ~ 0;
- vnet_sw_interface_t *swif;
- dhcpv6_option_t *r0 = 0, *o;
- u16 len = 0;
- u8 interface_opt_flag = 0;
- u8 relay_msg_opt_flag = 0;
- ip6_main_t *im = &ip6_main;
- u32 server_fib_idx, client_fib_idx;
-
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- h0 = vlib_buffer_get_current (b0);
-
- if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
- {
- error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
-
- drop_packet:
- vlib_node_increment_counter (vm, dhcpv6_proxy_to_client_node.index,
- error0, 1);
-
- f0 = vlib_get_frame_to_node (vm, dm->error_drop_node_index);
- to_next0 = vlib_frame_vector_args (f0);
- to_next0[0] = bi0;
- f0->n_vectors = 1;
- vlib_put_frame_to_node (vm, dm->error_drop_node_index, f0);
- goto do_trace;
- }
- /* hop count seems not need to be checked */
- if (HOP_COUNT_LIMIT < h0->hop_count)
- {
- error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
- goto drop_packet;
- }
- u0 = (void *) h0 - (sizeof (*u0));
- ip0 = (void *) u0 - (sizeof (*ip0));
-
- vlib_buffer_advance (b0, sizeof (*h0));
- o = vlib_buffer_get_current (b0);
-
- /* Parse through TLVs looking for option 18 (DHCPV6_OPTION_INTERFACE_ID)
- _and_ option 9 (DHCPV6_OPTION_RELAY_MSG) option which must be there.
- Currently assuming no other options need to be processed
- The interface-ID is the FIB number we need
- to track down the client-facing interface */
-
- while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
- {
- if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16 (o->option))
- {
- interface_opt_flag = 1;
- if (clib_net_to_host_u16 (o->length) == sizeof (sw_if_index))
- sw_if_index =
- clib_net_to_host_u32 (((dhcpv6_int_id_t *) o)->int_idx);
- if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
- {
- error0 = DHCPV6_PROXY_ERROR_WRONG_INTERFACE_ID_OPTION;
- goto drop_packet;
- }
- }
- if (DHCPV6_OPTION_RELAY_MSG == clib_net_to_host_u16 (o->option))
- {
- relay_msg_opt_flag = 1;
- r0 = vlib_buffer_get_current (b0);
- }
- if ((relay_msg_opt_flag == 1) && (interface_opt_flag == 1))
- break;
- vlib_buffer_advance (b0,
- sizeof (*o) +
- clib_net_to_host_u16 (o->length));
- o =
- (dhcpv6_option_t *) (((uword) o) +
- clib_net_to_host_u16 (o->length) +
- sizeof (*o));
- }
-
- if ((relay_msg_opt_flag == 0) || (r0 == 0))
- {
- error0 = DHCPV6_PROXY_ERROR_NO_RELAY_MESSAGE_OPTION;
- goto drop_packet;
- }
-
- if ((u32) ~ 0 == sw_if_index)
- {
- error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
- goto drop_packet;
- }
-
- //Advance buffer to start of encapsulated DHCPv6 message
- vlib_buffer_advance (b0, sizeof (*r0));
-
- client_fib_idx = im->mfib_index_by_sw_if_index[sw_if_index];
- proxy = dhcp_get_proxy (dm, client_fib_idx, FIB_PROTOCOL_IP6);
-
- if (NULL == proxy)
- {
- error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
- goto drop_packet;
- }
-
- server_fib_idx = im->fib_index_by_sw_if_index
- [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
-
- vec_foreach (server, proxy->dhcp_servers)
- {
- if (server_fib_idx == server->server_fib_index &&
- ip0->src_address.as_u64[0] == server->dhcp_server.ip6.as_u64[0] &&
- ip0->src_address.as_u64[1] == server->dhcp_server.ip6.as_u64[1])
- {
- goto server_found;
- }
- }
-
- //drop packet if not from server with configured address or FIB
- error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
- goto drop_packet;
-
- server_found:
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
- = sw_if_index;
-
- swif = vnet_get_sw_interface (vnm, original_sw_if_index);
- if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
- sw_if_index = swif->unnumbered_sw_if_index;
-
-
- /*
- * udp_local hands us the DHCPV6 header, need udp hdr,
- * ip hdr to relay to client
- */
- vlib_buffer_advance (b0, -(sizeof (*u1)));
- u1 = vlib_buffer_get_current (b0);
-
- vlib_buffer_advance (b0, -(sizeof (*ip1)));
- ip1 = vlib_buffer_get_current (b0);
-
- copy_ip6_address (&client_address, &h0->peer_addr);
-
- ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
- if (ia0 == 0)
- {
- error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
- goto drop_packet;
- }
-
- len = clib_net_to_host_u16 (r0->length);
- clib_memset (ip1, 0, sizeof (*ip1));
- copy_ip6_address (&ip1->dst_address, &client_address);
- u1->checksum = 0;
- u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
- u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
- u1->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
-
- ip1->ip_version_traffic_class_and_flow_label =
- ip0->ip_version_traffic_class_and_flow_label & 0x00000fff;
- ip1->payload_length = u1->length;
- ip1->protocol = PROTO_UDP;
- ip1->hop_limit = HOP_COUNT_LIMIT;
- copy_ip6_address (&ip1->src_address, ia0);
-
- u1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip1,
- &bogus_length);
- ASSERT (bogus_length == 0);
-
- vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
- si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
- if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
- vlib_buffer_advance (b0, -4 /* space for VLAN tag */ );
-
- mac0 = vlib_buffer_get_current (b0);
-
- hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
- ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
- clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
- clib_memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
- mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
- clib_net_to_host_u16 (0x8100) : clib_net_to_host_u16 (0x86dd);
-
- if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
- {
- u32 *vlan_tag = (u32 *) (mac0 + 1);
- u32 tmp;
- tmp = (si0->sub.id << 16) | 0x0800;
- *vlan_tag = clib_host_to_net_u32 (tmp);
- }
-
- /* $$$ consider adding a dynamic next to the graph node, for performance */
- f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
- to_next0 = vlib_frame_vector_args (f0);
- to_next0[0] = bi0;
- f0->n_vectors = 1;
- vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
-
- do_trace:
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
- b0, sizeof (*tr));
- tr->which = 1; /* to client */
- if (ia0)
- copy_ip6_address ((ip6_address_t *) tr->packet_data, ia0);
- tr->error = error0;
- tr->original_sw_if_index = original_sw_if_index;
- tr->sw_if_index = sw_if_index;
- }
- }
- return from_frame->n_vectors;
-
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node, static) = {
- .function = dhcpv6_proxy_to_client_input,
- .name = "dhcpv6-proxy-to-client",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
-
- .n_errors = DHCPV6_PROXY_N_ERROR,
- .error_strings = dhcpv6_proxy_error_strings,
- .format_buffer = format_dhcpv6_proxy_header_with_length,
- .format_trace = format_dhcpv6_proxy_trace,
-#if 0
- .unformat_buffer = unformat_dhcpv6_proxy_header,
-#endif
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-dhcp6_proxy_init (vlib_main_t * vm)
-{
- dhcp_proxy_main_t *dm = &dhcp_proxy_main;
- vlib_node_t *error_drop_node;
-
- error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
- dm->error_drop_node_index = error_drop_node->index;
-
- /* RFC says this is the dhcpv6 server address */
- all_dhcpv6_server_address.as_u64[0] =
- clib_host_to_net_u64 (0xFF05000000000000);
- all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
-
- /* RFC says this is the server and agent address */
- all_dhcpv6_server_relay_agent_address.as_u64[0] =
- clib_host_to_net_u64 (0xFF02000000000000);
- all_dhcpv6_server_relay_agent_address.as_u64[1] =
- clib_host_to_net_u64 (0x00010002);
-
- return 0;
-}
-
-VLIB_INIT_FUNCTION (dhcp6_proxy_init);
-
-int
-dhcp6_proxy_set_server (ip46_address_t * addr,
- ip46_address_t * src_addr,
- u32 rx_table_id, u32 server_table_id, int is_del)
-{
- vlib_main_t *vm = vlib_get_main ();
- u32 rx_fib_index = 0;
- int rc = 0;
-
- const mfib_prefix_t all_dhcp_servers = {
- .fp_len = 128,
- .fp_proto = FIB_PROTOCOL_IP6,
- .fp_grp_addr = {
- .ip6 = all_dhcpv6_server_relay_agent_address,
- }
- };
-
- if (ip46_address_is_zero (addr))
- return VNET_API_ERROR_INVALID_DST_ADDRESS;
-
- if (ip46_address_is_zero (src_addr))
- return VNET_API_ERROR_INVALID_SRC_ADDRESS;
-
- rx_fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
- rx_table_id,
- MFIB_SOURCE_DHCP);
-
- if (is_del)
- {
- if (dhcp_proxy_server_del (FIB_PROTOCOL_IP6, rx_fib_index,
- addr, server_table_id))
- {
- mfib_table_entry_delete (rx_fib_index,
- &all_dhcp_servers, MFIB_SOURCE_DHCP);
- mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6,
- MFIB_SOURCE_DHCP);
-
- udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
- 0 /* is_ip6 */ );
- udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
- 0 /* is_ip6 */ );
- }
- }
- else
- {
- const fib_route_path_t path_for_us = {
- .frp_proto = DPO_PROTO_IP6,
- .frp_addr = zero_addr,
- .frp_sw_if_index = 0xffffffff,
- .frp_fib_index = ~0,
- .frp_weight = 1,
- .frp_flags = FIB_ROUTE_PATH_LOCAL,
- .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD,
- };
- if (dhcp_proxy_server_add (FIB_PROTOCOL_IP6, addr, src_addr,
- rx_fib_index, server_table_id))
- {
- mfib_table_entry_path_update (rx_fib_index,
- &all_dhcp_servers,
- MFIB_SOURCE_DHCP, &path_for_us);
- /*
- * Each interface that is enabled in this table, needs to be added
- * as an accepting interface, but this is not easily doable in VPP.
- * So we cheat. Add a flag to the entry that indicates accept form
- * any interface.
- * We will still only accept on v6 enabled interfaces, since the
- * input feature ensures this.
- */
- mfib_table_entry_update (rx_fib_index,
- &all_dhcp_servers,
- MFIB_SOURCE_DHCP,
- MFIB_RPF_ID_NONE,
- MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
- mfib_table_lock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
-
- udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
- dhcpv6_proxy_to_client_node.index,
- 0 /* is_ip6 */ );
- udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
- dhcpv6_proxy_to_server_node.index,
- 0 /* is_ip6 */ );
- }
- }
-
- mfib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP6, MFIB_SOURCE_DHCP);
-
- return (rc);
-}
-
-static clib_error_t *
-dhcpv6_proxy_set_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- ip46_address_t addr, src_addr;
- int set_server = 0, set_src_address = 0;
- u32 rx_table_id = 0, server_table_id = 0;
- int is_del = 0;
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (input, "server %U", unformat_ip6_address, &addr.ip6))
- set_server = 1;
- else if (unformat (input, "src-address %U",
- unformat_ip6_address, &src_addr.ip6))
- set_src_address = 1;
- else if (unformat (input, "server-fib-id %d", &server_table_id))
- ;
- else if (unformat (input, "rx-fib-id %d", &rx_table_id))
- ;
- else if (unformat (input, "delete") || unformat (input, "del"))
- is_del = 1;
- else
- break;
- }
-
- if (is_del || (set_server && set_src_address))
- {
- int rv;
-
- rv = dhcp6_proxy_set_server (&addr, &src_addr, rx_table_id,
- server_table_id, is_del);
-
- //TODO: Complete the errors
- switch (rv)
- {
- case 0:
- return 0;
-
- case VNET_API_ERROR_INVALID_DST_ADDRESS:
- return clib_error_return (0, "Invalid server address");
-
- case VNET_API_ERROR_INVALID_SRC_ADDRESS:
- return clib_error_return (0, "Invalid src address");
-
- case VNET_API_ERROR_NO_SUCH_ENTRY:
- return clib_error_return
- (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
-
- default:
- return clib_error_return (0, "BUG: rv %d", rv);
- }
- }
- else
- return clib_error_return (0, "parse error`%U'",
- format_unformat_error, input);
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
- .path = "set dhcpv6 proxy",
- .short_help = "set dhcpv6 proxy [del] server <ipv6-addr> src-address <ipv6-addr> "
- "[server-fib-id <fib-id>] [rx-fib-id <fib-id>] ",
- .function = dhcpv6_proxy_set_command_fn,
-};
-/* *INDENT-ON* */
-
-static u8 *
-format_dhcp6_proxy_server (u8 * s, va_list * args)
-{
- dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
- fib_table_t *server_fib;
- dhcp_server_t *server;
- ip6_mfib_t *rx_fib;
-
- if (proxy == 0)
- {
- s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
- "Servers FIB,Address");
- return s;
- }
-
- rx_fib = ip6_mfib_get (proxy->rx_fib_index);
-
- s = format (s, "%=14u%=16U",
- rx_fib->table_id,
- format_ip46_address, &proxy->dhcp_src_address, IP46_TYPE_ANY);
-
- vec_foreach (server, proxy->dhcp_servers)
- {
- server_fib = fib_table_get (server->server_fib_index, FIB_PROTOCOL_IP6);
- s = format (s, "%u,%U ",
- server_fib->ft_table_id,
- format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY);
- }
-
- return s;
-}
-
-static int
-dhcp6_proxy_show_walk (dhcp_proxy_t * proxy, void *ctx)
-{
- vlib_main_t *vm = ctx;
-
- vlib_cli_output (vm, "%U", format_dhcp6_proxy_server, proxy);
-
- return (1);
-}
-
-static clib_error_t *
-dhcpv6_proxy_show_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- vlib_cli_output (vm, "%U", format_dhcp6_proxy_server,
- NULL /* header line */ );
-
- dhcp_proxy_walk (FIB_PROTOCOL_IP6, dhcp6_proxy_show_walk, vm);
-
- return (NULL);
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
- .path = "show dhcpv6 proxy",
- .short_help = "Display dhcpv6 proxy info",
- .function = dhcpv6_proxy_show_command_fn,
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-dhcpv6_vss_command_fn (vlib_main_t * vm,
- unformat_input_t * input, vlib_cli_command_t * cmd)
-{
- u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
- u8 *vpn_ascii_id = 0;
- u32 oui = 0, fib_id = 0, tbl_id = ~0;
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (input, "table %d", &tbl_id))
- ;
- else if (unformat (input, "oui %d", &oui))
- vss_type = VSS_TYPE_VPN_ID;
- else if (unformat (input, "vpn-id %d", &fib_id))
- vss_type = VSS_TYPE_VPN_ID;
- else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
- vss_type = VSS_TYPE_ASCII;
- else if (unformat (input, "delete") || unformat (input, "del"))
- is_del = 1;
- else
- break;
- }
-
- if (tbl_id == ~0)
- return clib_error_return (0, "no table ID specified.");
-
- int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP6, tbl_id, vss_type,
- vpn_ascii_id, oui, fib_id, is_del);
- switch (rv)
- {
- case 0:
- return 0;
- case VNET_API_ERROR_NO_SUCH_ENTRY:
- return clib_error_return (0, "vss for table %d not found in pool.",
- tbl_id);
- default:
- return clib_error_return (0, "BUG: rv %d", rv);
- }
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
- .path = "set dhcpv6 vss",
- .short_help = "set dhcpv6 vss table <table-id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
- .function = dhcpv6_vss_command_fn,
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-dhcpv6_vss_show_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- dhcp_vss_walk (FIB_PROTOCOL_IP6, dhcp_vss_show_walk, vm);
-
- return (NULL);
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
- .path = "show dhcpv6 vss",
- .short_help = "show dhcpv6 VSS",
- .function = dhcpv6_vss_show_command_fn,
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-dhcpv6_link_address_show_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- vnet_main_t *vnm = vnet_get_main ();
- u32 sw_if_index0 = 0, sw_if_index;
- vnet_sw_interface_t *swif;
- ip6_address_t *ia0;
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
-
- if (unformat (input, "%U",
- unformat_vnet_sw_interface, vnm, &sw_if_index0))
- {
- swif = vnet_get_sw_interface (vnm, sw_if_index0);
- sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
- swif->unnumbered_sw_if_index : sw_if_index0;
- ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
- if (ia0)
- {
- vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
-
- vlib_cli_output (vm, "%=20U%=48U",
- format_vnet_sw_if_index_name, vnm,
- sw_if_index0, format_ip6_address, ia0);
- }
- else
- vlib_cli_output (vm, "%=34s%=20U",
- "No IPv6 address configured on",
- format_vnet_sw_if_index_name, vnm, sw_if_index);
- }
- else
- break;
- }
-
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
- .path = "show dhcpv6 link-address interface",
- .short_help = "show dhcpv6 link-address interface <interface>",
- .function = dhcpv6_link_address_show_command_fn,
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff