diff options
Diffstat (limited to 'src/vnet/dhcp/dhcp6_proxy_node.c')
| -rw-r--r-- | src/vnet/dhcp/dhcp6_proxy_node.c | 1186 |
1 files changed, 0 insertions, 1186 deletions
diff --git a/src/vnet/dhcp/dhcp6_proxy_node.c b/src/vnet/dhcp/dhcp6_proxy_node.c deleted file mode 100644 index 174548f24eb..00000000000 --- a/src/vnet/dhcp/dhcp6_proxy_node.c +++ /dev/null @@ -1,1186 +0,0 @@ -/* - * 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: - */ |