From 02bfd641b69aab83397e217b9ca4e35a6aab05c8 Mon Sep 17 00:00:00 2001 From: Neale Ranns Date: Mon, 7 Oct 2019 00:39:28 -0700 Subject: dhcp: Move to plugin Type: feature Change-Id: I3fe27a8ef577741d9a5c4f090ec91cf68fb44fe3 Signed-off-by: Neale Ranns --- src/vnet/dhcp/dhcp_client_detect.c | 324 ------------------------------------- 1 file changed, 324 deletions(-) delete mode 100644 src/vnet/dhcp/dhcp_client_detect.c (limited to 'src/vnet/dhcp/dhcp_client_detect.c') diff --git a/src/vnet/dhcp/dhcp_client_detect.c b/src/vnet/dhcp/dhcp_client_detect.c deleted file mode 100644 index c79970d1456..00000000000 --- a/src/vnet/dhcp/dhcp_client_detect.c +++ /dev/null @@ -1,324 +0,0 @@ -/* - * DHCP feature; applied as an input feature to select DHCP packets - * - * 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 -#include - -#define foreach_dhcp_client_detect \ - _(EXTRACT, "Extract") - -typedef enum -{ -#define _(sym,str) DHCP_CLIENT_DETECT_ERROR_##sym, - foreach_dhcp_client_detect -#undef _ - DHCP_CLIENT_DETECT_N_ERROR, -} dhcp_client_detect_error_t; - -static char *dhcp_client_detect_error_strings[] = { -#define _(sym,string) string, - foreach_dhcp_client_detect -#undef _ -}; - -typedef enum -{ -#define _(sym,str) DHCP_CLIENT_DETECT_NEXT_##sym, - foreach_dhcp_client_detect -#undef _ - DHCP_CLIENT_DETECT_N_NEXT, -} dhcp_client_detect_next_t; - -/** - * per-packet trace data - */ -typedef struct dhcp_client_detect_trace_t_ -{ - /* per-pkt trace data */ - u8 extracted; -} dhcp_client_detect_trace_t; - -VLIB_NODE_FN (dhcp_client_detect_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - dhcp_client_detect_next_t next_index; - u16 dhcp_client_port_network_order; - u32 n_left_from, *from, *to_next; - u32 extractions; - - dhcp_client_port_network_order = - clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_client); - next_index = 0; - extractions = 0; - n_left_from = frame->n_vectors; - from = vlib_frame_vector_args (frame); - - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - /* - * This loop is optimised not so we can really quickly process DHCp - * offers... but so we can quickly sift them out when the interface - * is also receiving 'normal' packets - */ - while (n_left_from >= 8 && n_left_to_next >= 4) - { - udp_header_t *udp0, *udp1, *udp2, *udp3; - ip4_header_t *ip0, *ip1, *ip2, *ip3; - vlib_buffer_t *b0, *b1, *b2, *b3; - u32 next0, next1, next2, next3; - u32 bi0, bi1, bi2, bi3; - - next0 = next1 = next2 = next3 = ~0; - bi0 = to_next[0] = from[0]; - bi1 = to_next[1] = from[1]; - bi2 = to_next[2] = from[2]; - bi3 = to_next[3] = from[3]; - - /* Prefetch next iteration. */ - { - vlib_buffer_t *p2, *p3, *p4, *p5; - - p2 = vlib_get_buffer (vm, from[2]); - p3 = vlib_get_buffer (vm, from[3]); - p4 = vlib_get_buffer (vm, from[4]); - p5 = vlib_get_buffer (vm, from[5]); - - vlib_prefetch_buffer_header (p2, STORE); - vlib_prefetch_buffer_header (p3, STORE); - vlib_prefetch_buffer_header (p4, STORE); - vlib_prefetch_buffer_header (p5, STORE); - - CLIB_PREFETCH (p2->data, sizeof (ip0[0]) + sizeof (udp0[0]), - STORE); - CLIB_PREFETCH (p3->data, sizeof (ip0[0]) + sizeof (udp0[0]), - STORE); - CLIB_PREFETCH (p4->data, sizeof (ip0[0]) + sizeof (udp0[0]), - STORE); - CLIB_PREFETCH (p5->data, sizeof (ip0[0]) + sizeof (udp0[0]), - STORE); - } - - from += 4; - to_next += 4; - n_left_from -= 4; - n_left_to_next -= 4; - - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); - b2 = vlib_get_buffer (vm, bi2); - b3 = vlib_get_buffer (vm, bi3); - ip0 = vlib_buffer_get_current (b0); - ip1 = vlib_buffer_get_current (b1); - ip2 = vlib_buffer_get_current (b2); - ip3 = vlib_buffer_get_current (b2); - - vnet_feature_next (&next0, b0); - vnet_feature_next (&next1, b1); - vnet_feature_next (&next2, b2); - vnet_feature_next (&next3, b3); - - if (ip0->protocol == IP_PROTOCOL_UDP) - { - udp0 = (udp_header_t *) (ip0 + 1); - - if (dhcp_client_port_network_order == udp0->dst_port) - { - next0 = DHCP_CLIENT_DETECT_NEXT_EXTRACT; - extractions++; - } - } - if (ip1->protocol == IP_PROTOCOL_UDP) - { - udp1 = (udp_header_t *) (ip1 + 1); - - if (dhcp_client_port_network_order == udp1->dst_port) - { - next1 = DHCP_CLIENT_DETECT_NEXT_EXTRACT; - extractions++; - } - } - if (ip2->protocol == IP_PROTOCOL_UDP) - { - udp2 = (udp_header_t *) (ip2 + 1); - - if (dhcp_client_port_network_order == udp2->dst_port) - { - next2 = DHCP_CLIENT_DETECT_NEXT_EXTRACT; - extractions++; - } - } - if (ip3->protocol == IP_PROTOCOL_UDP) - { - udp3 = (udp_header_t *) (ip3 + 1); - - if (dhcp_client_port_network_order == udp3->dst_port) - { - next3 = DHCP_CLIENT_DETECT_NEXT_EXTRACT; - extractions++; - } - } - - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - dhcp_client_detect_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->extracted = (next0 == DHCP_CLIENT_DETECT_NEXT_EXTRACT); - } - if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) - { - dhcp_client_detect_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->extracted = (next1 == DHCP_CLIENT_DETECT_NEXT_EXTRACT); - } - if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED)) - { - dhcp_client_detect_trace_t *t = - vlib_add_trace (vm, node, b2, sizeof (*t)); - t->extracted = (next2 == DHCP_CLIENT_DETECT_NEXT_EXTRACT); - } - if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED)) - { - dhcp_client_detect_trace_t *t = - vlib_add_trace (vm, node, b3, sizeof (*t)); - t->extracted = (next3 == DHCP_CLIENT_DETECT_NEXT_EXTRACT); - } - - /* verify speculative enqueue, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x4 (vm, node, next_index, - to_next, n_left_to_next, - bi0, bi1, bi2, bi3, - next0, next1, next2, next3); - } - - while (n_left_from > 0 && n_left_to_next > 0) - { - udp_header_t *udp0; - vlib_buffer_t *b0; - ip4_header_t *ip0; - u32 next0 = ~0; - u32 bi0; - - 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); - ip0 = vlib_buffer_get_current (b0); - - /* - * when this feature is applied on an interface that is already - * accepting packets (because e.g. the interface has other addresses - * assigned) we are looking for the preverbial needle in the haystack - * so assume the packet is not the one we are looking for. - */ - vnet_feature_next (&next0, b0); - - /* - * all we are looking for here is DHCP/BOOTP packet-to-client - * UDO port. - */ - if (ip0->protocol == IP_PROTOCOL_UDP) - { - udp0 = (udp_header_t *) (ip0 + 1); - - if (dhcp_client_port_network_order == udp0->dst_port) - { - next0 = DHCP_CLIENT_DETECT_NEXT_EXTRACT; - extractions++; - } - } - - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - dhcp_client_detect_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->extracted = (next0 == DHCP_CLIENT_DETECT_NEXT_EXTRACT); - } - - /* verify speculative enqueue, maybe switch current next frame */ - 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, node->node_index, - DHCP_CLIENT_DETECT_ERROR_EXTRACT, extractions); - - return frame->n_vectors; -} - -/* packet trace format function */ -static u8 * -format_dhcp_client_detect_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_client_detect_trace_t *t = - va_arg (*args, dhcp_client_detect_trace_t *); - - s = format (s, "dhcp-client-detect: %s", (t->extracted ? "yes" : "no")); - - return s; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (dhcp_client_detect_node) = { - .name = "ip4-dhcp-client-detect", - .vector_size = sizeof (u32), - .format_trace = format_dhcp_client_detect_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(dhcp_client_detect_error_strings), - .error_strings = dhcp_client_detect_error_strings, - - .n_next_nodes = DHCP_CLIENT_DETECT_N_NEXT, - .next_nodes = { - /* - * Jump straight to the UDP dispatch node thus avoiding - * the RPF checks in ip4-local that will fail - */ - [DHCP_CLIENT_DETECT_NEXT_EXTRACT] = "ip4-udp-lookup", - }, -}; - -VNET_FEATURE_INIT (ip4_dvr_reinject_feat_node, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-dhcp-client-detect", - .runs_before = VNET_FEATURES ("ip4-not-enabled"), -}; - -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ -- cgit 1.2.3-korg