vnet: fix ARP for unnumbered - vpp - Vector Packet Processing

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author	Pim van Pelt <pim@ipng.nl>	2024-03-08 09:27:40 +0100
committer	Neale Ranns <neale@graphiant.com>	2024-04-09 04:26:21 +0000
commit	2a7bc81ae302b02e8e0d4eec7db82c1ca15b7f7a (patch)
tree	46572a13e4be6271032862c1ab18e17e35515903 /test/test_ipip.py
parent	0bfce6b7243af63c74823c78a9c98377079efec7 (diff)

vnet: fix ARP for unnumbered

On unnumbered interfaces, ARP fails because there is no attached route. Allow replies to peer-to-peer addresses on unnumbered interfaces: eg. 192.0.2.1/32 <-> 192.0.2.2/32 Type: fix Change-Id: Ibeb8d8ebc8d58d5bfb0724739a17694e0217356e Signed-off-by: Pim van Pelt <pim@ipng.nl>

Diffstat (limited to 'test/test_ipip.py')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2017 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/vnet.h> #include <vnet/pg/pg.h> #include <vppinfra/error.h> #include <ioam/ipfixcollector/ipfixcollector.h> #include <vnet/flow/ipfix_packet.h> #define foreach_ipfix_collector_error \ _(PROCESSED, "Number of IP-Fix packets processed") \ _(NO_LISTENER, "Number of IP-Fix packets with no listener") typedef enum { #define _(sym,str) IPFIX_COLLECTOR_ERROR_##sym, foreach_ipfix_collector_error #undef _ IPFIX_COLLECTOR_N_ERROR, } flowperpkt_error_t; static char *ipfix_collector_error_strings[] = { #define _(sym,string) string, foreach_ipfix_collector_error #undef _ }; typedef enum { IPFIX_COLLECTOR_NEXT_DROP, IPFIX_COLLECTOR_N_NEXT, } ipfix_collector_next_t; typedef struct { u32 next_node; u16 set_id; u16 pad; } ipfix_collector_trace_t; vlib_node_registration_t ipfix_collector_node; /* packet trace format function */ static u8 * format_ipfix_collector_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 *); ipfix_collector_trace_t *t = va_arg (*args, ipfix_collector_trace_t *); s = format (s, "IPFIX_COLLECTOR: set_id %u, next_node %u", t->set_id, t->next_node); return s; } /** * @brief Node to receive IP-Fix packets. * @node ipfix-collector * * This function receives IP-FIX packets and forwards them to other graph nodes * based on SetID field in IP-FIX. * * @param vm vlib_main_t corresponding to the current thread. * @param node vlib_node_runtime_t data for this node. * @param frame vlib_frame_t whose contents should be dispatched. * * @par Graph mechanics: buffer, next index usage * * <em>Uses:</em> * - <code>vlib_buffer_get_current(p0)</code> * - Parses IP-Fix packet to extract SetId which will be used to decide * next node where packets should be enqueued. * * <em>Next Index:</em> * - Dispatches the packet to other VPP graph nodes based on their registartion * for the IP-Fix SetId using API ipfix_collector_reg_setid(). */ uword ipfix_collector_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { u32 n_left_from, next_index, *from, *to_next; word n_no_listener = 0; word n_listener = 0; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; 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 >= 4 && n_left_to_next >= 2) { u32 bi0, bi1; vlib_buffer_t *b0, *b1; u32 next0, next1; ipfix_message_header_t *ipfix0, *ipfix1; ipfix_set_header_t *set0, *set1; u16 set_id0, set_id1; ipfix_client *client0, *client1; /* Prefetch next iteration. */ { vlib_buffer_t *p2, *p3; p2 = vlib_get_buffer (vm, from[2]); p3 = vlib_get_buffer (vm, from[3]); vlib_prefetch_buffer_header (p2, LOAD); vlib_prefetch_buffer_header (p3, LOAD); CLIB_PREFETCH (p2->data, (sizeof (ipfix_message_header_t) + sizeof (ipfix_set_header_t)), LOAD); CLIB_PREFETCH (p3->data, (sizeof (ipfix_message_header_t) + sizeof (ipfix_set_header_t)), LOAD); } bi0 = from[0]; bi1 = from[1]; to_next[0] = bi0; to_next[1] = bi1; from += 2; to_next += 2; n_left_to_next -= 2; n_left_from -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); ipfix0 = vlib_buffer_get_current (b0); ipfix1 = vlib_buffer_get_current (b1); set0 = (ipfix_set_header_t *) (ipfix0 + 1); set1 = (ipfix_set_header_t *) (ipfix1 + 1); set_id0 = (u16) (clib_net_to_host_u32 (set0->set_id_length) >> 16); set_id1 = (u16) (clib_net_to_host_u32 (set1->set_id_length) >> 16); client0 = ipfix_collector_get_client (set_id0); client1 = ipfix_collector_get_client (set_id1); if (PREDICT_TRUE (NULL != client0)) { next0 = client0->client_next_node; n_listener++; } else { next0 = IPFIX_COLLECTOR_NEXT_DROP; n_no_listener++; } if (PREDICT_TRUE (NULL != client1)) { next1 = client1->client_next_node; n_listener++; } else { next1 = IPFIX_COLLECTOR_NEXT_DROP; n_no_listener++; } vlib_buffer_advance (b0, (sizeof (ipfix_message_header_t) + sizeof (ipfix_set_header_t))); vlib_buffer_advance (b1, (sizeof (ipfix_message_header_t) + sizeof (ipfix_set_header_t))); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { ipfix_collector_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->next_node = (client0 ? client0->client_node : 0xFFFFFFFF); tr->set_id = set_id0; } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { ipfix_collector_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); tr->next_node = (client1 ? client1->client_node : 0xFFFFFFFF); tr->set_id = set_id1; } vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1); } while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; u32 next0; ipfix_message_header_t *ipfix0; ipfix_set_header_t *set0; u16 set_id0; ipfix_client *client0; 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); ipfix0 = vlib_buffer_get_current (b0); set0 = (ipfix_set_header_t *) (ipfix0 + 1); set_id0 = (u16) (clib_net_to_host_u32 (set0->set_id_length) >> 16); client0 = ipfix_collector_get_client (set_id0); if (PREDICT_TRUE (NULL != client0)) { next0 = client0->client_next_node; n_listener++; } else { next0 = IPFIX_COLLECTOR_NEXT_DROP; n_no_listener++; } vlib_buffer_advance (b0, (sizeof (ipfix_message_header_t) + sizeof (ipfix_set_header_t))); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { ipfix_collector_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->next_node = (client0 ? client0->client_node : 0xFFFFFFFF); tr->set_id = set_id0; } 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_error_count (vm, node->node_index, IPFIX_COLLECTOR_ERROR_NO_LISTENER, n_no_listener); vlib_error_count (vm, node->node_index, IPFIX_COLLECTOR_ERROR_PROCESSED, n_listener); return from_frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (ipfix_collector_node) = { .function = ipfix_collector_node_fn, .name = "ipfix-collector", .vector_size = sizeof (u32), .format_trace = format_ipfix_collector_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(ipfix_collector_error_strings), .error_strings = ipfix_collector_error_strings, .n_next_nodes = IPFIX_COLLECTOR_N_NEXT, /* edit / add dispositions here */ .next_nodes = { [IPFIX_COLLECTOR_NEXT_DROP] = "error-drop", }, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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