/* * mpcap_node.c - unit-test plugin mapped pcap test node * * Copyright (c) * 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 #include #include #include #include static mpcap_main_t test_mpcap_main = { .file_name = "/tmp/mpcap_unittest.pcap", .n_packets_to_capture = 15, .packet_type = MPCAP_PACKET_TYPE_ethernet, }; typedef struct { u32 sw_if_index; u32 next_index; } mpcap_trace_t; #ifndef CLIB_MARCH_VARIANT /* packet trace format function */ static u8 * format_mpcap_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 *); mpcap_trace_t *t = va_arg (*args, mpcap_trace_t *); s = format (s, "MPCAP: sw_if_index %d, next index %d\n", t->sw_if_index, t->next_index); return s; } vlib_node_registration_t mpcap_node; #endif /* CLIB_MARCH_VARIANT */ #define foreach_mpcap_error \ _(PROCESSED, "Mapped pcap packets processed") typedef enum { #define _(sym,str) MPCAP_ERROR_##sym, foreach_mpcap_error #undef _ MPCAP_N_ERROR, } mpcap_error_t; #ifndef CLIB_MARCH_VARIANT static char *mpcap_error_strings[] = { #define _(sym,string) string, foreach_mpcap_error #undef _ }; #endif /* CLIB_MARCH_VARIANT */ typedef enum { MPCAP_NEXT_DROP, MPCAP_N_NEXT, } mpcap_next_t; always_inline uword mpcap_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, int is_ip4, int is_trace) { u32 n_left_from, *from; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; u16 nexts[VLIB_FRAME_SIZE], *next; mpcap_main_t *mm = &test_mpcap_main; int i = 0; f64 now = vlib_time_now (vm); u32 error_index = node->errors[MPCAP_ERROR_PROCESSED]; if (!(mm->flags & MPCAP_FLAG_INIT_DONE)) { clib_error_t *error; error = mpcap_init (mm); if (error) clib_error_report (error); mm->flags |= MPCAP_FLAG_INIT_DONE; } from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; vlib_get_buffers (vm, from, bufs, n_left_from); b = bufs; next = nexts; while (n_left_from >= 4) { /* Prefetch next iteration. */ if (PREDICT_TRUE (n_left_from >= 8)) { vlib_prefetch_buffer_header (b[4], STORE); vlib_prefetch_buffer_header (b[5], STORE); vlib_prefetch_buffer_header (b[6], STORE); vlib_prefetch_buffer_header (b[7], STORE); clib_prefetch_store (b[4]->data); clib_prefetch_store (b[5]->data); clib_prefetch_store (b[6]->data); clib_prefetch_store (b[7]->data); } next[0] = 0; next[1] = 0; next[2] = 0; next[3] = 0; b[0]->error = error_index; b[1]->error = error_index; b[2]->error = error_index; b[3]->error = error_index; mpcap_add_buffer (mm, vm, now, from[i++], vlib_buffer_length_in_chain (vm, b[0])); mpcap_add_buffer (mm, vm, now, from[i++], vlib_buffer_length_in_chain (vm, b[1])); mpcap_add_buffer (mm, vm, now, from[i++], vlib_buffer_length_in_chain (vm, b[2])); mpcap_add_buffer (mm, vm, now, from[i++], vlib_buffer_length_in_chain (vm, b[3])); if (is_trace) { if (b[0]->flags & VLIB_BUFFER_IS_TRACED) { mpcap_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t)); t->next_index = next[0]; t->sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX]; } if (b[1]->flags & VLIB_BUFFER_IS_TRACED) { mpcap_trace_t *t = vlib_add_trace (vm, node, b[1], sizeof (*t)); t->next_index = next[1]; t->sw_if_index = vnet_buffer (b[1])->sw_if_index[VLIB_RX]; } if (b[2]->flags & VLIB_BUFFER_IS_TRACED) { mpcap_trace_t *t = vlib_add_trace (vm, node, b[2], sizeof (*t)); t->next_index = next[2]; t->sw_if_index = vnet_buffer (b[2])->sw_if_index[VLIB_RX]; } if (b[3]->flags & VLIB_BUFFER_IS_TRACED) { mpcap_trace_t *t = vlib_add_trace (vm, node, b[3], sizeof (*t)); t->next_index = next[3]; t->sw_if_index = vnet_buffer (b[3])->sw_if_index[VLIB_RX]; } } b += 4; next += 4; n_left_from -= 4; } while (n_left_from > 0) { mpcap_add_buffer (mm, vm, now, from[i++], vlib_buffer_length_in_chain (vm, b[0])); next[0] = 0; b[0]->error = error_index; if (is_trace) { if (b[0]->flags & VLIB_BUFFER_IS_TRACED) { mpcap_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t)); t->next_index = next[0]; t->sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX]; } } b += 1; next += 1; n_left_from -= 1; } vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); return frame->n_vectors; } VLIB_NODE_FN (mpcap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) return mpcap_inline (vm, node, frame, 1 /* is_ip4 */ , 1 /* is_trace */ ); else return mpcap_inline (vm, node, frame, 1 /* is_ip4 */ , 0 /* is_trace */ ); } #ifndef CLIB_MARCH_VARIANT VLIB_REGISTER_NODE (mpcap_node) = { .name = "mpcap-unittest", .vector_size = sizeof (u32), .format_trace = format_mpcap_trace, .format_buffer = format_ethernet_header_with_length, .unformat_buffer = unformat_ethernet_header, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(mpcap_error_strings), .error_strings = mpcap_error_strings, .n_next_nodes = MPCAP_N_NEXT, /* edit / add dispositions here */ .next_nodes = { [MPCAP_NEXT_DROP] = "error-drop", }, }; static clib_error_t * mpcap_node_init (vlib_main_t *vm) { /* So we can send ethernet/IP packets from the pg... */ ethernet_setup_node (vm, mpcap_node.index); return 0; } VLIB_INIT_FUNCTION (mpcap_node_init); #endif /* CLIB_MARCH_VARIANT */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */