diff options
Diffstat (limited to 'src/vnet/dhcp/dhcp4_proxy_node.c')
| -rw-r--r-- | src/vnet/dhcp/dhcp4_proxy_node.c | 1090 |
1 files changed, 0 insertions, 1090 deletions
diff --git a/src/vnet/dhcp/dhcp4_proxy_node.c b/src/vnet/dhcp/dhcp4_proxy_node.c deleted file mode 100644 index 3576f0cbf35..00000000000 --- a/src/vnet/dhcp/dhcp4_proxy_node.c +++ /dev/null @@ -1,1090 +0,0 @@ -/* - * proxy_node.c: dhcp 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/client.h> -#include <vnet/fib/ip4_fib.h> - -static char *dhcp_proxy_error_strings[] = { -#define dhcp_proxy_error(n,s) s, -#include <vnet/dhcp/dhcp4_proxy_error.def> -#undef dhcp_proxy_error -}; - -#define foreach_dhcp_proxy_to_server_input_next \ - _ (DROP, "error-drop") \ - _ (LOOKUP, "ip4-lookup") \ - _ (SEND_TO_CLIENT, "dhcp-proxy-to-client") - -typedef enum -{ -#define _(s,n) DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s, - foreach_dhcp_proxy_to_server_input_next -#undef _ - DHCP_PROXY_TO_SERVER_INPUT_N_NEXT, -} dhcp_proxy_to_server_input_next_t; - -typedef struct -{ - /* 0 => to server, 1 => to client */ - int which; - ip4_address_t trace_ip4_address; - u32 error; - u32 sw_if_index; - u32 original_sw_if_index; -} dhcp_proxy_trace_t; - -#define VPP_DHCP_OPTION82_SUB1_SIZE 6 -#define VPP_DHCP_OPTION82_SUB5_SIZE 6 -#define VPP_DHCP_OPTION82_VSS_SIZE 12 -#define VPP_DHCP_OPTION82_SIZE (VPP_DHCP_OPTION82_SUB1_SIZE + \ - VPP_DHCP_OPTION82_SUB5_SIZE + \ - VPP_DHCP_OPTION82_VSS_SIZE +3) - -static vlib_node_registration_t dhcp_proxy_to_server_node; -static vlib_node_registration_t dhcp_proxy_to_client_node; - -static u8 * -format_dhcp_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 *); - dhcp_proxy_trace_t *t = va_arg (*args, dhcp_proxy_trace_t *); - - if (t->which == 0) - s = format (s, "DHCP proxy: sent to server %U\n", - format_ip4_address, &t->trace_ip4_address, t->error); - else - s = format (s, "DHCP proxy: broadcast to client from %U\n", - format_ip4_address, &t->trace_ip4_address); - - if (t->error != (u32) ~ 0) - s = format (s, " error: %s\n", dhcp_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_dhcp_proxy_header_with_length (u8 * s, va_list * args) -{ - dhcp_header_t *h = va_arg (*args, dhcp_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, "dhcp header truncated"); - - s = format (s, "DHCP Proxy"); - - return s; -} - -static uword -dhcp_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; - u32 pkts_too_big = 0; - ip4_main_t *im = &ip4_main; - - 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) - { - u32 bi0; - vlib_buffer_t *b0; - udp_header_t *u0; - dhcp_header_t *h0; - ip4_header_t *ip0; - u32 next0; - u32 old0, new0; - ip_csum_t sum0; - u32 error0 = (u32) ~ 0; - u32 sw_if_index = 0; - u32 original_sw_if_index = 0; - u32 fib_index; - dhcp_proxy_t *proxy; - dhcp_server_t *server; - u32 rx_sw_if_index; - dhcp_option_t *o, *end; - u32 len = 0; - u8 is_discover = 0; - int space_left; - - 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 DHCP header, need udp hdr, - * ip hdr to relay to server - */ - vlib_buffer_advance (b0, -(sizeof (*u0))); - u0 = vlib_buffer_get_current (b0); - - /* This blows. Return traffic has src_port = 67, dst_port = 67 */ - if (u0->src_port == - clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_server)) - { - vlib_buffer_advance (b0, sizeof (*u0)); - next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT; - error0 = 0; - pkts_to_client++; - goto do_enqueue; - } - - rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - fib_index = im->fib_index_by_sw_if_index[rx_sw_if_index]; - proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4); - - if (PREDICT_FALSE (NULL == proxy)) - { - error0 = DHCP_PROXY_ERROR_NO_SERVER; - next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; - pkts_no_server++; - goto do_trace; - } - - if (!vlib_buffer_chain_linearize (vm, b0)) - { - error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG; - next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; - pkts_too_big++; - goto do_trace; - } - space_left = vlib_buffer_space_left_at_end (vm, b0); - /* cant parse chains... - * and we need some space for option 82*/ - if ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) != 0 || - space_left < VPP_DHCP_OPTION82_SIZE) - { - error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG; - next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; - pkts_too_big++; - goto do_trace; - } - - server = &proxy->dhcp_servers[0]; - vlib_buffer_advance (b0, -(sizeof (*ip0))); - ip0 = vlib_buffer_get_current (b0); - - /* disable UDP checksum */ - u0->checksum = 0; - sum0 = ip0->checksum; - old0 = ip0->dst_address.as_u32; - new0 = server->dhcp_server.ip4.as_u32; - ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32; - sum0 = ip_csum_update (sum0, old0, new0, - ip4_header_t /* structure */ , - dst_address /* changed member */ ); - ip0->checksum = ip_csum_fold (sum0); - - sum0 = ip0->checksum; - old0 = ip0->src_address.as_u32; - new0 = proxy->dhcp_src_address.ip4.as_u32; - ip0->src_address.as_u32 = new0; - sum0 = ip_csum_update (sum0, old0, new0, - ip4_header_t /* structure */ , - src_address /* changed member */ ); - ip0->checksum = ip_csum_fold (sum0); - - /* Send to DHCP server via the configured FIB */ - vnet_buffer (b0)->sw_if_index[VLIB_TX] = server->server_fib_index; - - h0->gateway_ip_address = proxy->dhcp_src_address.ip4; - pkts_to_server++; - - o = h0->options; - end = (void *) vlib_buffer_get_tail (b0); - - /* TLVs are not performance-friendly... */ - while (o->option != DHCP_PACKET_OPTION_END && o < end) - { - if (DHCP_PACKET_OPTION_MSG_TYPE == o->option) - { - if (DHCP_PACKET_DISCOVER == o->data[0]) - { - is_discover = 1; - } - } - o = (dhcp_option_t *) (o->data + o->length); - } - - if (o->option == DHCP_PACKET_OPTION_END && o <= end) - { - vnet_main_t *vnm = vnet_get_main (); - u16 old_l0, new_l0; - ip4_address_t _ia0, *ia0 = &_ia0; - dhcp_vss_t *vss; - vnet_sw_interface_t *swif; - - original_sw_if_index = sw_if_index = - vnet_buffer (b0)->sw_if_index[VLIB_RX]; - swif = vnet_get_sw_interface (vnm, sw_if_index); - if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) - sw_if_index = swif->unnumbered_sw_if_index; - - /* - * Get the first ip4 address on the [client-side] - * RX interface, if not unnumbered. otherwise use - * the loopback interface's ip address. - */ - ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0); - - if (ia0 == 0) - { - error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS; - next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP; - pkts_no_interface_address++; - goto do_trace; - } - - /* Add option 82 */ - o->option = 82; /* option 82 */ - o->length = 12; /* 12 octets to follow */ - o->data[0] = 1; /* suboption 1, circuit ID (=FIB id) */ - o->data[1] = 4; /* length of suboption */ - u32 *o_ifid = (u32 *) & o->data[2]; - *o_ifid = clib_host_to_net_u32 (original_sw_if_index); - o->data[6] = 5; /* suboption 5 (client RX intfc address) */ - o->data[7] = 4; /* length 4 */ - u32 *o_addr = (u32 *) & o->data[8]; - *o_addr = ia0->as_u32; - o->data[12] = DHCP_PACKET_OPTION_END; - - vss = dhcp_get_vss_info (dpm, fib_index, FIB_PROTOCOL_IP4); - if (vss) - { - u32 id_len; /* length of VPN ID */ - - if (vss->vss_type == VSS_TYPE_VPN_ID) - { - id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */ - memcpy (&o->data[15], vss->vpn_id, id_len); - } - else if (vss->vss_type == VSS_TYPE_ASCII) - { - id_len = vec_len (vss->vpn_ascii_id); - memcpy (&o->data[15], vss->vpn_ascii_id, id_len); - } - else /* must be VSS_TYPE_DEFAULT, no VPN ID */ - id_len = 0; - - o->data[12] = 151; /* vss suboption */ - o->data[13] = id_len + 1; /* length: vss_type + id_len */ - o->data[14] = vss->vss_type; /* vss option type */ - o->data[15 + id_len] = 152; /* vss control suboption */ - o->data[16 + id_len] = 0; /* length */ - o->data[17 + id_len] = DHCP_PACKET_OPTION_END; /* "end-of-options" (0xFF) */ - /* 5 bytes for suboption headers 151+len, 152+len and 0xFF */ - o->length += id_len + 5; - } - - len = o->length + 3; - b0->current_length += len; - /* Fix IP header length and checksum */ - old_l0 = ip0->length; - new_l0 = clib_net_to_host_u16 (old_l0); - new_l0 += len; - new_l0 = clib_host_to_net_u16 (new_l0); - ip0->length = new_l0; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t, - length /* changed member */ ); - ip0->checksum = ip_csum_fold (sum0); - - /* Fix UDP length */ - new_l0 = clib_net_to_host_u16 (u0->length); - new_l0 += len; - u0->length = clib_host_to_net_u16 (new_l0); - } - else - { - vlib_node_increment_counter - (vm, dhcp_proxy_to_server_node.index, - DHCP_PROXY_ERROR_OPTION_82_ERROR, 1); - } - - next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP; - - /* - * If we have multiple servers configured and this is the - * client's discover message, then send copies to each of - * those servers - */ - if (is_discover && 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); - - sum0 = ip0->checksum; - old0 = ip0->dst_address.as_u32; - new0 = server->dhcp_server.ip4.as_u32; - ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32; - sum0 = ip_csum_update (sum0, old0, new0, - ip4_header_t /* structure */ , - dst_address /* changed member */ ); - ip0->checksum = ip_csum_fold (sum0); - - 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)) - { - dhcp_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 = original_sw_if_index; - tr->sw_if_index = sw_if_index; - if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP) - tr->trace_ip4_address.as_u32 = - server->dhcp_server.ip4.as_u32; - } - - 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)) - { - dhcp_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 = original_sw_if_index; - tr->sw_if_index = sw_if_index; - if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP) - tr->trace_ip4_address.as_u32 = - proxy->dhcp_servers[0].dhcp_server.ip4.as_u32; - } - - 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, dhcp_proxy_to_server_node.index, - DHCP_PROXY_ERROR_RELAY_TO_CLIENT, - pkts_to_client); - vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, - DHCP_PROXY_ERROR_RELAY_TO_SERVER, - pkts_to_server); - vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, - DHCP_PROXY_ERROR_NO_SERVER, pkts_no_server); - vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, - DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS, - pkts_no_interface_address); - vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index, - DHCP_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big); - return from_frame->n_vectors; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (dhcp_proxy_to_server_node, static) = { - .function = dhcp_proxy_to_server_input, - .name = "dhcp-proxy-to-server", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - - .n_errors = DHCP_PROXY_N_ERROR, - .error_strings = dhcp_proxy_error_strings, - - .n_next_nodes = DHCP_PROXY_TO_SERVER_INPUT_N_NEXT, - .next_nodes = { -#define _(s,n) [DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s] = n, - foreach_dhcp_proxy_to_server_input_next -#undef _ - }, - - .format_buffer = format_dhcp_proxy_header_with_length, - .format_trace = format_dhcp_proxy_trace, -#if 0 - .unformat_buffer = unformat_dhcp_proxy_header, -#endif -}; -/* *INDENT-ON* */ - -static uword -dhcp_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 *dpm = &dhcp_proxy_main; - vnet_main_t *vnm = vnet_get_main (); - ip4_main_t *im = &ip4_main; - - 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; - dhcp_header_t *h0; - ip4_header_t *ip0 = 0; - ip4_address_t *ia0 = 0; - u32 old0, new0; - ip_csum_t sum0; - 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; - vnet_sw_interface_t *si0; - u32 error0 = (u32) ~ 0; - vnet_sw_interface_t *swif; - u32 fib_index; - dhcp_proxy_t *proxy; - dhcp_server_t *server; - u32 original_sw_if_index = (u32) ~ 0; - ip4_address_t relay_addr = { - .as_u32 = 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 DHCP header, need udp hdr, - * ip hdr to relay to client - */ - vlib_buffer_advance (b0, -(sizeof (*u0))); - u0 = vlib_buffer_get_current (b0); - - vlib_buffer_advance (b0, -(sizeof (*ip0))); - ip0 = vlib_buffer_get_current (b0); - - /* Consumed by dhcp client code? */ - if (dhcp_client_for_us (bi0, b0, ip0, u0, h0)) - continue; - - if (1 /* dpm->insert_option_82 */ ) - { - /* linearize needed to "unclone" and scan options */ - int rv = vlib_buffer_chain_linearize (vm, b0); - if ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) != 0 || !rv) - { - error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG; - goto drop_packet; - } - - dhcp_option_t *o = h0->options, *end = - (void *) vlib_buffer_get_tail (b0); - - /* Parse through TLVs looking for option 82. - The circuit-ID is the FIB number we need - to track down the client-facing interface */ - - while (o->option != DHCP_PACKET_OPTION_END && o < end) - { - if (o->option == 82) - { - u32 vss_exist = 0; - u32 vss_ctrl = 0; - dhcp_option_t *sub = (dhcp_option_t *) & o->data[0]; - dhcp_option_t *subend = - (dhcp_option_t *) (o->data + o->length); - while (sub->option != DHCP_PACKET_OPTION_END - && sub < subend) - { - /* If this is one of ours, it will have - total length 12, circuit-id suboption type, - and the sw_if_index */ - if (sub->option == 1 && sub->length == 4) - { - sw_if_index = ((sub->data[0] << 24) | - (sub->data[1] << 16) | - (sub->data[2] << 8) | - (sub->data[3])); - } - else if (sub->option == 5 && sub->length == 4) - { - relay_addr.as_u8[0] = sub->data[0]; - relay_addr.as_u8[1] = sub->data[1]; - relay_addr.as_u8[2] = sub->data[2]; - relay_addr.as_u8[3] = sub->data[3]; - } - else if (sub->option == 151 && - sub->length == 7 && sub->data[0] == 1) - vss_exist = 1; - else if (sub->option == 152 && sub->length == 0) - vss_ctrl = 1; - sub = (dhcp_option_t *) (sub->data + sub->length); - } - if (vss_ctrl && vss_exist) - vlib_node_increment_counter - (vm, dhcp_proxy_to_client_node.index, - DHCP_PROXY_ERROR_OPTION_82_VSS_NOT_PROCESSED, 1); - - } - o = (dhcp_option_t *) (o->data + o->length); - } - } - - if (sw_if_index == (u32) ~ 0) - { - error0 = DHCP_PROXY_ERROR_NO_OPTION_82; - - drop_packet: - vlib_node_increment_counter (vm, dhcp_proxy_to_client_node.index, - error0, 1); - f0 = vlib_get_frame_to_node (vm, dpm->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, dpm->error_drop_node_index, f0); - goto do_trace; - } - - if (relay_addr.as_u32 == 0) - { - error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ADDR; - goto drop_packet; - } - - if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index)) - { - error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ITF; - goto drop_packet; - } - - fib_index = im->fib_index_by_sw_if_index[sw_if_index]; - proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4); - - if (PREDICT_FALSE (NULL == proxy)) - { - error0 = DHCP_PROXY_ERROR_NO_SERVER; - goto drop_packet; - } - - vec_foreach (server, proxy->dhcp_servers) - { - if (ip0->src_address.as_u32 == server->dhcp_server.ip4.as_u32) - { - goto server_found; - } - } - - error0 = DHCP_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS; - goto drop_packet; - - server_found: - vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index; - - swif = vnet_get_sw_interface (vnm, sw_if_index); - original_sw_if_index = sw_if_index; - if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) - sw_if_index = swif->unnumbered_sw_if_index; - - ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0); - if (ia0 == 0) - { - error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS; - goto drop_packet; - } - - if (relay_addr.as_u32 != ia0->as_u32) - { - error0 = DHCP_PROXY_ERROR_BAD_YIADDR; - goto drop_packet; - } - - u0->checksum = 0; - u0->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_client); - sum0 = ip0->checksum; - old0 = ip0->dst_address.as_u32; - new0 = 0xFFFFFFFF; - ip0->dst_address.as_u32 = new0; - sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ , - dst_address /* offset of changed member */ ); - ip0->checksum = ip_csum_fold (sum0); - - sum0 = ip0->checksum; - old0 = ip0->src_address.as_u32; - new0 = ia0->as_u32; - ip0->src_address.as_u32 = new0; - sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ , - src_address /* offset of changed member */ ); - ip0->checksum = ip_csum_fold (sum0); - - 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 (0x0800); - - 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); - } - - /* $$$ This needs to be rewritten, for sure */ - 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)) - { - dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node, - b0, sizeof (*tr)); - tr->which = 1; /* to client */ - tr->trace_ip4_address.as_u32 = ia0 ? ia0->as_u32 : 0; - 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 (dhcp_proxy_to_client_node, static) = { - .function = dhcp_proxy_to_client_input, - .name = "dhcp-proxy-to-client", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - - .n_errors = DHCP_PROXY_N_ERROR, - .error_strings = dhcp_proxy_error_strings, - .format_buffer = format_dhcp_proxy_header_with_length, - .format_trace = format_dhcp_proxy_trace, -#if 0 - .unformat_buffer = unformat_dhcp_proxy_header, -#endif -}; -/* *INDENT-ON* */ - -void -dhcp_maybe_register_udp_ports (dhcp_port_reg_flags_t ports) -{ - dhcp_proxy_main_t *dm = &dhcp_proxy_main; - vlib_main_t *vm = dm->vlib_main; - int port_regs_diff = dm->udp_ports_registered ^ ports; - - if (!port_regs_diff) - return; - - if ((port_regs_diff & DHCP_PORT_REG_CLIENT) & ports) - udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_client, - dhcp_proxy_to_client_node.index, 1 /* is_ip4 */ ); - - if ((port_regs_diff & DHCP_PORT_REG_SERVER) & ports) - udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_server, - dhcp_proxy_to_server_node.index, 1 /* is_ip4 */ ); - - dm->udp_ports_registered |= ports; -} - -static clib_error_t * -dhcp4_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; - dm->vlib_main = vm; - - return 0; -} - - -VLIB_INIT_FUNCTION (dhcp4_proxy_init); - -int -dhcp4_proxy_set_server (ip46_address_t * addr, - ip46_address_t * src_addr, - u32 rx_table_id, u32 server_table_id, int is_del) -{ - u32 rx_fib_index = 0; - int rc = 0; - - const fib_prefix_t all_1s = { - .fp_len = 32, - .fp_addr.ip4.as_u32 = 0xffffffff, - .fp_proto = FIB_PROTOCOL_IP4, - }; - - 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; - - dhcp_maybe_register_udp_ports (DHCP_PORT_REG_CLIENT | DHCP_PORT_REG_SERVER); - - rx_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, - rx_table_id, - FIB_SOURCE_DHCP); - - if (is_del) - { - if (dhcp_proxy_server_del (FIB_PROTOCOL_IP4, rx_fib_index, - addr, server_table_id)) - { - fib_table_entry_special_remove (rx_fib_index, - &all_1s, FIB_SOURCE_DHCP); - fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP); - } - } - else - { - if (dhcp_proxy_server_add (FIB_PROTOCOL_IP4, - addr, src_addr, - rx_fib_index, server_table_id)) - { - fib_table_entry_special_add (rx_fib_index, - &all_1s, - FIB_SOURCE_DHCP, FIB_ENTRY_FLAG_LOCAL); - fib_table_lock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP); - } - } - fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP); - - return (rc); -} - -static clib_error_t * -dhcp4_proxy_set_command_fn (vlib_main_t * vm, - unformat_input_t * input, - vlib_cli_command_t * cmd) -{ - ip46_address_t server_addr, src_addr; - u32 server_table_id = 0, rx_table_id = 0; - int is_del = 0; - int set_src = 0, set_server = 0; - - clib_memset (&server_addr, 0, sizeof (server_addr)); - clib_memset (&src_addr, 0, sizeof (src_addr)); - - while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (input, "server %U", - unformat_ip4_address, &server_addr.ip4)) - set_server = 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, "src-address %U", - unformat_ip4_address, &src_addr.ip4)) - set_src = 1; - else if (unformat (input, "delete") || unformat (input, "del")) - is_del = 1; - else - break; - } - - if (is_del || (set_server && set_src)) - { - int rv; - - rv = dhcp4_proxy_set_server (&server_addr, &src_addr, rx_table_id, - server_table_id, is_del); - 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 (dhcp_proxy_set_command, static) = { - .path = "set dhcp proxy", - .short_help = "set dhcp proxy [del] server <ip-addr> src-address <ip-addr> [server-fib-id <n>] [rx-fib-id <n>]", - .function = dhcp4_proxy_set_command_fn, -}; -/* *INDENT-ON* */ - -static u8 * -format_dhcp4_proxy_server (u8 * s, va_list * args) -{ - dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *); - ip4_fib_t *rx_fib, *server_fib; - dhcp_server_t *server; - - if (proxy == 0) - { - s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address", - "Servers FIB,Address"); - return s; - } - - rx_fib = ip4_fib_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 = ip4_fib_get (server->server_fib_index); - s = format (s, "%u,%U ", - server_fib->table_id, - format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY); - } - return s; -} - -static int -dhcp4_proxy_show_walk (dhcp_proxy_t * server, void *ctx) -{ - vlib_main_t *vm = ctx; - - vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, server); - - return (1); -} - -static clib_error_t * -dhcp4_proxy_show_command_fn (vlib_main_t * vm, - unformat_input_t * input, - vlib_cli_command_t * cmd) -{ - vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, - NULL /* header line */ ); - - dhcp_proxy_walk (FIB_PROTOCOL_IP4, dhcp4_proxy_show_walk, vm); - - return (NULL); -} - -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (dhcp_proxy_show_command, static) = { - .path = "show dhcp proxy", - .short_help = "Display dhcp proxy server info", - .function = dhcp4_proxy_show_command_fn, -}; -/* *INDENT-ON* */ - -static clib_error_t * -dhcp_option_82_vss_fn (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT; - u32 oui = 0, fib_id = 0, tbl_id = ~0; - u8 *vpn_ascii_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_IP4, 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, - "option 82 vss for table %d not found in in pool.", - tbl_id); - default: - return clib_error_return (0, "BUG: rv %d", rv); - - } -} - -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (dhcp_proxy_vss_command,static) = { - .path = "set dhcp option-82 vss", - .short_help = "set dhcp option-82 vss [del] table <table id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]", - .function = dhcp_option_82_vss_fn, -}; -/* *INDENT-ON* */ - -static clib_error_t * -dhcp_vss_show_command_fn (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - dhcp_vss_walk (FIB_PROTOCOL_IP4, dhcp_vss_show_walk, vm); - - return (NULL); -} - -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (dhcp_proxy_vss_show_command, static) = { - .path = "show dhcp vss", - .short_help = "show dhcp VSS", - .function = dhcp_vss_show_command_fn, -}; -/* *INDENT-ON* */ - -static clib_error_t * -dhcp_option_82_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; - ip4_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 = ip4_interface_first_address (&ip4_main, sw_if_index, 0); - if (ia0) - { - vlib_cli_output (vm, "%=20s%=20s", "interface", - "source IP address"); - - vlib_cli_output (vm, "%=20U%=20U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, format_ip4_address, ia0); - } - else - vlib_cli_output (vm, "%=34s %=20U", - "No IPv4 address configured on", - format_vnet_sw_if_index_name, vnm, sw_if_index); - } - else - break; - } - - return 0; -} - -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (dhcp_proxy_address_show_command,static) = { - .path = "show dhcp option-82-address interface", - .short_help = "show dhcp option-82-address interface <interface>", - .function = dhcp_option_82_address_show_command_fn, -}; -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |