diff options
Diffstat (limited to 'src/vnet/dhcpv6/proxy_node.c')
| -rw-r--r-- | src/vnet/dhcpv6/proxy_node.c | 1280 |
1 files changed, 0 insertions, 1280 deletions
diff --git a/src/vnet/dhcpv6/proxy_node.c b/src/vnet/dhcpv6/proxy_node.c deleted file mode 100644 index f40798e6c5d..00000000000 --- a/src/vnet/dhcpv6/proxy_node.c +++ /dev/null @@ -1,1280 +0,0 @@ -/* - * 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/dhcpv6/proxy.h> -#include <vnet/dhcp/proxy.h> -#include <vnet/fib/ip6_fib.h> -#include <vnet/mfib/mfib_table.h> -#include <vnet/mfib/ip6_mfib.h> - -static char * dhcpv6_proxy_error_strings[] = { -#define dhcpv6_proxy_error(n,s) s, -#include "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; - -vlib_node_registration_t dhcpv6_proxy_to_server_node; -vlib_node_registration_t dhcpv6_proxy_to_client_node; - - -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; -} - -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; - - 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; - } - })); - 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 inline dhcpv6_vss_info * -dhcpv6_get_vss_info (dhcpv6_proxy_main_t *dm, - u32 rx_fib_index) -{ - dhcpv6_vss_info *v; - - if (vec_len(dm->vss_index_by_rx_fib_index) <= rx_fib_index || - dm->vss_index_by_rx_fib_index[rx_fib_index] == ~0) - { - v = NULL; - } - else - { - v = pool_elt_at_index (dm->vss, - dm->vss_index_by_rx_fib_index[rx_fib_index]); - } - - return (v); -} - -static inline dhcpv6_server_t * -dhcpv6_get_server (dhcpv6_proxy_main_t *dm, - u32 rx_fib_index) -{ - dhcpv6_server_t *s = NULL; - - if (vec_len(dm->dhcp6_server_index_by_rx_fib_index) > rx_fib_index && - dm->dhcp6_server_index_by_rx_fib_index[rx_fib_index] != ~0) - { - s = pool_elt_at_index (dm->dhcp6_servers, - dm->dhcp6_server_index_by_rx_fib_index[rx_fib_index]); - } - - return (s); -} - -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; - dhcpv6_proxy_main_t * dpm = &dhcpv6_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; - dhcpv6_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]; - vlib_buffer_free_list_t *fl; - dhcpv6_vss_info *vss; - - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 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->u.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->fib_index_by_sw_if_index [rx_sw_if_index]; - server = dhcpv6_get_server(dpm, rx_fib_idx); - - if (PREDICT_FALSE (NULL == server)) - { - error0 = DHCPV6_PROXY_ERROR_NO_SERVER; - next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP; - pkts_no_server++; - goto do_trace; - } - - server_fib_idx = server->server_fib6_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->u.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->u.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: - fl = vlib_buffer_get_free_list (vm, b0->free_list_index); - - if ((b0->current_length+sizeof(*id1)+sizeof(*vss1)+sizeof(*cmac)) - > fl->n_data_bytes) - { - 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->u.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); - } - - //TODO: Revisit if hash makes sense here - vss = dhcpv6_get_vss_info(dpm, rx_fib_idx); - - if (NULL != vss) { - vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length); - b0->current_length += (sizeof (*vss1)); - vss1->opt.length =clib_host_to_net_u16(sizeof(*vss1) - - sizeof(vss1->opt)); - vss1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_VSS); - vss1->data[0] = 1; // type - vss1->data[1] = vss->vpn_id.oui >>16 & 0xff; - vss1->data[2] = vss->vpn_id.oui >>8 & 0xff; - vss1->data[3] = vss->vpn_id.oui & 0xff; - vss1->data[4] = vss->vpn_id.fib_id >> 24 & 0xff; - vss1->data[5] = vss->vpn_id.fib_id >> 16 & 0xff; - vss1->data[6] = vss->vpn_id.fib_id >> 8 & 0xff; - vss1->data[7] = vss->vpn_id.fib_id & 0xff; - u1->length += sizeof(*vss1); - } - - 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); - - 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->dhcp6_server.as_u64[0] || server->dhcp6_server.as_u64[1]) ? - &server->dhcp6_server : &dpm->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 = (server->dhcp6_src_address.as_u64[0] || server->dhcp6_src_address.as_u64[1]) ? - &server->dhcp6_src_address : 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; - - 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->dhcp6_server); - } - - do_enqueue: - 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; -} - -VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node) = { - .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 -}; - -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 = ethernet_get_main (vm); - dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main; - dhcpv6_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->fib_index_by_sw_if_index[sw_if_index]; - server = dhcpv6_get_server(dm, client_fib_idx); - - if (NULL == server) - { - 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]]; - - if (server_fib_idx != server->server_fib6_index || - ip0->src_address.as_u64[0] != server->dhcp6_server.as_u64[0] || - ip0->src_address.as_u64[1] != server->dhcp6_server.as_u64[1]) - { - //drop packet if not from server with configured address or FIB - error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS; - goto drop_packet; - } - - 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); - 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)); - 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; - -} - -VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node) = { - .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 -}; - -clib_error_t * dhcpv6_proxy_init (vlib_main_t * vm) -{ - dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main; - vlib_node_t * error_drop_node; - dhcpv6_server_t * server; - - dm->vlib_main = vm; - dm->vnet_main = vnet_get_main(); - error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop"); - dm->error_drop_node_index = error_drop_node->index; - - dm->vss_index_by_rx_fib_index = NULL; - - /* RFC says this is the dhcpv6 server address */ - dm->all_dhcpv6_server_address.as_u64[0] = clib_host_to_net_u64 (0xFF05000000000000); - dm->all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003); - - /* RFC says this is the server and agent address */ - dm->all_dhcpv6_server_relay_agent_address.as_u64[0] = clib_host_to_net_u64 (0xFF02000000000000); - dm->all_dhcpv6_server_relay_agent_address.as_u64[1] = clib_host_to_net_u64 (0x00010002); - - 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 */); - - /* Create the default server, don't mark it valid */ - pool_get (dm->dhcp6_servers, server); - memset (server, 0, sizeof (*server)); - - return 0; -} - -VLIB_INIT_FUNCTION (dhcpv6_proxy_init); - -int dhcpv6_proxy_set_server (ip6_address_t *addr, - ip6_address_t *src_address, - u32 rx_fib_id, - u32 server_fib_id, - int is_del) -{ - dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main; - dhcpv6_server_t * server = 0; - u32 rx_fib_index = 0; - int rc = 0; - - rx_fib_index = ip6_mfib_table_find_or_create_and_lock(rx_fib_id); - - const mfib_prefix_t all_dhcp_servers = { - .fp_len = 128, - .fp_proto = FIB_PROTOCOL_IP6, - .fp_grp_addr = { - .ip6 = dm->all_dhcpv6_server_relay_agent_address, - } - }; - - if (is_del) - { - server = dhcpv6_get_server(dm, rx_fib_index); - - if (NULL == server) - { - rc = VNET_API_ERROR_NO_SUCH_ENTRY; - goto out; - } - - /* - * release the locks held on the server fib and rx mfib - */ - mfib_table_entry_delete(rx_fib_index, - &all_dhcp_servers, - MFIB_SOURCE_DHCP); - mfib_table_unlock(rx_fib_index, FIB_PROTOCOL_IP6); - fib_table_unlock(server->server_fib6_index, FIB_PROTOCOL_IP6); - - dm->dhcp6_server_index_by_rx_fib_index[rx_fib_index] = ~0; - - memset (server, 0, sizeof (*server)); - pool_put (dm->dhcp6_servers, server); - } - else - { - if (addr->as_u64[0] == 0 && - addr->as_u64[1] == 0 ) - { - rc = VNET_API_ERROR_INVALID_DST_ADDRESS; - goto out; - } - if (src_address->as_u64[0] == 0 && - src_address->as_u64[1] == 0) - { - rc = VNET_API_ERROR_INVALID_SRC_ADDRESS; - goto out; - } - - server = dhcpv6_get_server(dm, rx_fib_index); - - if (NULL != server) - { - /* modify of an existing entry */ - ip6_fib_t *fib; - - fib = ip6_fib_get(server->server_fib6_index); - - if (fib->table_id != server_fib_id) - { - /* swap tables */ - fib_table_unlock(server->server_fib6_index, FIB_PROTOCOL_IP6); - server->server_fib6_index = - ip6_fib_table_find_or_create_and_lock(server_fib_id); - } - } - else - { - /* Allocate a new server */ - pool_get (dm->dhcp6_servers, server); - - vec_validate_init_empty (dm->dhcp6_server_index_by_rx_fib_index, - rx_fib_index, ~0); - dm->dhcp6_server_index_by_rx_fib_index[rx_fib_index] = - server - dm->dhcp6_servers; - - server->server_fib6_index = - ip6_fib_table_find_or_create_and_lock(server_fib_id); - mfib_table_lock(rx_fib_index, FIB_PROTOCOL_IP6); - - const mfib_prefix_t all_dhcp_servers = { - .fp_len = 128, - .fp_proto = FIB_PROTOCOL_IP6, - .fp_grp_addr = { - .ip6 = dm->all_dhcpv6_server_relay_agent_address, - } - }; - const fib_route_path_t path_for_us = { - .frp_proto = FIB_PROTOCOL_IP6, - .frp_addr = zero_addr, - .frp_sw_if_index = 0xffffffff, - .frp_fib_index = ~0, - .frp_weight = 0, - .frp_flags = FIB_ROUTE_PATH_LOCAL, - }; - mfib_table_entry_path_update(rx_fib_index, - &all_dhcp_servers, - MFIB_SOURCE_DHCP, - &path_for_us, - MFIB_ITF_FLAG_FORWARD); - /* - * 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_ENTRY_FLAG_ACCEPT_ALL_ITF); - } - copy_ip6_address(&server->dhcp6_server, addr); - copy_ip6_address(&server->dhcp6_src_address, src_address); - } - -out: - mfib_table_unlock(rx_fib_index, FIB_PROTOCOL_IP6); - - return (rc); -} - -static clib_error_t * -dhcpv6_proxy_set_command_fn (vlib_main_t * vm, - unformat_input_t * input, - vlib_cli_command_t * cmd) -{ - ip6_address_t addr, src_addr; - int set_server = 0, set_src_address = 0; - u32 rx_fib_id = 0, server_fib_id = 0; - int is_del = 0; - - while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (input, "server %U", - unformat_ip6_address, &addr)) - set_server = 1; - else if (unformat(input, "src-address %U", - unformat_ip6_address, &src_addr)) - set_src_address =1; - else if (unformat (input, "server-fib-id %d", &server_fib_id)) - ; - else if (unformat (input, "rx-fib-id %d", &rx_fib_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 = dhcpv6_proxy_set_server (&addr, &src_addr, rx_fib_id, - server_fib_id, is_del); - - //TODO: Complete the errors - switch (rv) - { - case 0: - return 0; - - case -1: - return clib_error_return (0, "FIB id %d does not exist", server_fib_id); - - default: - return clib_error_return (0, "BUG: rv %d", rv); - } - } - else - return clib_error_return (0, "parse error`%U'", - format_unformat_error, input); -} - -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, -}; - -u8 * format_dhcpv6_proxy_server (u8 * s, va_list * args) -{ - dhcpv6_proxy_main_t * dm = va_arg (*args, dhcpv6_proxy_main_t *); - dhcpv6_server_t * server = va_arg (*args, dhcpv6_server_t *); - u32 rx_fib_index = va_arg (*args, u32); - ip6_fib_t * rx_fib, * server_fib; - u32 server_fib_id = (u32)~0, rx_fib_id = ~0; - - if (dm == 0) - { - s = format (s, "%=40s%=40s%=14s%=14s", "Server Address", "Source Address", - "Server FIB", "RX FIB"); - return s; - } - - server_fib = ip6_fib_get(server->server_fib6_index); - if (server_fib) - server_fib_id= server_fib->table_id; - - rx_fib= ip6_fib_get(rx_fib_index); - - if (rx_fib) - rx_fib_id = rx_fib->table_id; - - s = format (s, "%=40U%=40U%=14u%=14u", - format_ip6_address, &server->dhcp6_server, - format_ip6_address, &server->dhcp6_src_address, - server_fib_id, rx_fib_id); - return s; -} - -static clib_error_t * -dhcpv6_proxy_show_command_fn (vlib_main_t * vm, - unformat_input_t * input, - vlib_cli_command_t * cmd) -{ - dhcpv6_proxy_main_t * dpm = &dhcpv6_proxy_main; - int i; - u32 server_index; - dhcpv6_server_t * server; - - vlib_cli_output (vm, "%U", format_dhcpv6_proxy_server, 0 /* header line */, - 0, 0); - vec_foreach_index (i, dpm->dhcp6_server_index_by_rx_fib_index) - { - server_index = dpm->dhcp6_server_index_by_rx_fib_index[i]; - if (~0 == server_index) - continue; - - server = pool_elt_at_index (dpm->dhcp6_servers, server_index); - - vlib_cli_output (vm, "%U", format_dhcpv6_proxy_server, dpm, - server, i); - } - - return 0; -} - -VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = { - .path = "show dhcpv6 proxy", - .short_help = "Display dhcpv6 proxy info", - .function = dhcpv6_proxy_show_command_fn, -}; - -void -dhcpv6_proxy_dump (void *opaque, - u32 context) -{ - dhcpv6_proxy_main_t * dpm = &dhcpv6_proxy_main; - ip6_fib_t *s_fib, *r_fib; - dhcpv6_server_t * server; - u32 server_index, i; - dhcpv6_vss_info *v; - - vec_foreach_index (i, dpm->dhcp6_server_index_by_rx_fib_index) - { - server_index = dpm->dhcp6_server_index_by_rx_fib_index[i]; - if (~0 == server_index) - continue; - - server = pool_elt_at_index (dpm->dhcp6_servers, server_index); - v = dhcpv6_get_vss_info(dpm, i); - - ip46_address_t src_addr = { - .ip6 = server->dhcp6_src_address, - }; - ip46_address_t server_addr = { - .ip6 = server->dhcp6_server, - }; - - s_fib = ip6_fib_get(server->server_fib6_index); - r_fib = ip6_fib_get(i); - - dhcp_send_details(opaque, - context, - &server_addr, - &src_addr, - s_fib->table_id, - r_fib->table_id, - (v ? v->vpn_id.fib_id : 0), - (v ? v->vpn_id.oui : 0)); - } -} - -int dhcpv6_proxy_set_vss(u32 tbl_id, - u32 oui, - u32 fib_id, - int is_del) -{ - dhcpv6_proxy_main_t *dm = &dhcpv6_proxy_main; - dhcpv6_vss_info *v = NULL; - u32 rx_fib_index; - int rc = 0; - - rx_fib_index = ip6_fib_table_find_or_create_and_lock(tbl_id); - v = dhcpv6_get_vss_info(dm, rx_fib_index); - - if (NULL != v) - { - if (is_del) - { - /* release the lock held on the table when the VSS - * info was created */ - fib_table_unlock (rx_fib_index, - FIB_PROTOCOL_IP6); - - pool_put (dm->vss, v); - dm->vss_index_by_rx_fib_index[rx_fib_index] = ~0; - } - else - { - /* this is a modify */ - v->vpn_id.fib_id = fib_id; - v->vpn_id.oui = oui; - } - } - else - { - if (is_del) - rc = VNET_API_ERROR_NO_SUCH_ENTRY; - else - { - /* create a new entry */ - vec_validate_init_empty(dm->vss_index_by_rx_fib_index, - rx_fib_index, ~0); - - /* hold a lock on the table whilst the VSS info exist */ - fib_table_lock (rx_fib_index, - FIB_PROTOCOL_IP6); - - pool_get (dm->vss, v); - v->vpn_id.fib_id = fib_id; - v->vpn_id.oui = oui; - dm->vss_index_by_rx_fib_index[rx_fib_index] = v - dm->vss; - } - } - - /* Release the lock taken during the create_or_lock at the start */ - fib_table_unlock (rx_fib_index, - FIB_PROTOCOL_IP6); - - return (rc); -} - - -static clib_error_t * -dhcpv6_vss_command_fn (vlib_main_t * vm, - unformat_input_t * input, - vlib_cli_command_t * cmd) -{ - int is_del = 0, got_new_vss=0; - u32 oui=0; - u32 fib_id=0, tbl_id=~0; - - while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (input, "oui %d", &oui)) - got_new_vss = 1; - else if (unformat (input, "vpn-id %d", &fib_id)) - got_new_vss = 1; - else if (unformat (input, "table %d", &tbl_id)) - got_new_vss = 1; - 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."); - - if (is_del || got_new_vss) - { - int rv; - - rv = dhcpv6_proxy_set_vss(tbl_id, oui, fib_id, is_del); - switch (rv) - { - case 0: - return 0; - - case VNET_API_ERROR_NO_SUCH_FIB: - return clib_error_return (0, "vss info (oui:%d, vpn-id:%d) not found in table %d.", - oui, fib_id, tbl_id); - - 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); - } - } - else - return clib_error_return (0, "parse error`%U'", - format_unformat_error, input); - -} - -VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = { - .path = "set dhcpv6 vss", - .short_help = "set dhcpv6 vss table <table-id> oui <oui> vpn-idx <vpn-idx>", - .function = dhcpv6_vss_command_fn, -}; - -static clib_error_t * -dhcpv6_vss_show_command_fn (vlib_main_t * vm, - unformat_input_t * input, - vlib_cli_command_t * cmd) - -{ - dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main; - dhcpv6_vss_info *v; - ip6_fib_t *fib; - u32 *fib_index; - - vlib_cli_output (vm, "%=6s%=6s%=12s","Table", "OUI", "VPN ID"); - pool_foreach (fib_index, dm->vss_index_by_rx_fib_index, - ({ - fib = ip6_fib_get (*fib_index); - v = pool_elt_at_index (dm->vss, *fib_index); - - vlib_cli_output (vm, "%=6d%=6d%=12d", - fib->table_id, - v->vpn_id.oui, - v->vpn_id.fib_id); - })); - - return 0; -} - -VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = { - .path = "show dhcpv6 vss", - .short_help = "show dhcpv6 VSS", - .function = dhcpv6_vss_show_command_fn, -}; - -static clib_error_t * -dhcpv6_link_address_show_command_fn (vlib_main_t * vm, - unformat_input_t * input, - vlib_cli_command_t * cmd) - -{ - dhcpv6_proxy_main_t *dm = &dhcpv6_proxy_main; - vnet_main_t *vnm = vnet_get_main(); - u32 sw_if_index0=0, sw_if_index; - ip6_address_t *ia0; - vnet_sw_interface_t *swif; - - while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT) - { - - if (unformat(input, "%U", - unformat_vnet_sw_interface, dm->vnet_main, &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, dm->vnet_main, 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, dm->vnet_main, sw_if_index); - } else - break; - } - - return 0; -} - -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, -}; |