diff options
Diffstat (limited to 'src/plugins/flowperpkt/l2_node.c')
| -rw-r--r-- | src/plugins/flowperpkt/l2_node.c | 561 |
1 files changed, 0 insertions, 561 deletions
diff --git a/src/plugins/flowperpkt/l2_node.c b/src/plugins/flowperpkt/l2_node.c deleted file mode 100644 index db80e990352..00000000000 --- a/src/plugins/flowperpkt/l2_node.c +++ /dev/null @@ -1,561 +0,0 @@ -/* - * l2_node.c - l2 ipfix-per-packet graph node - * - * Copyright (c) <current-year> <your-organization> - * 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 <flowperpkt/flowperpkt.h> - -/** - * @file l2 flow record generator graph node - */ - -typedef struct -{ - /** interface handle */ - u32 rx_sw_if_index; - u32 tx_sw_if_index; - /** src and dst L2 addresses */ - u8 src_mac[6]; - u8 dst_mac[6]; - /** Ethertype */ - u16 ethertype; - /** packet timestamp */ - u64 timestamp; - /** size of the buffer */ - u16 buffer_size; -} flowperpkt_l2_trace_t; - -/* packet trace format function */ -static u8 * -format_flowperpkt_l2_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 *); - flowperpkt_l2_trace_t *t = va_arg (*args, flowperpkt_l2_trace_t *); - - s = format (s, - "FLOWPERPKT-L2: rx_sw_if_index %d, tx_sw_if_index %d, src %U dst %U ethertype %0x2, timestamp %lld, size %d", - t->rx_sw_if_index, t->tx_sw_if_index, - format_ethernet_address, &t->src_mac, - format_ethernet_address, &t->dst_mac, - t->ethertype, t->timestamp, t->buffer_size); - return s; -} - -vlib_node_registration_t flowperpkt_l2_node; - -/* No counters at the moment */ -#define foreach_flowperpkt_l2_error - -typedef enum -{ -#define _(sym,str) FLOWPERPKT_ERROR_##sym, - foreach_flowperpkt_l2_error -#undef _ - FLOWPERPKT_N_ERROR, -} flowperpkt_l2_error_t; - -static char *flowperpkt_l2_error_strings[] = { -#define _(sym,string) string, - foreach_flowperpkt_l2_error -#undef _ -}; - -typedef enum -{ - FLOWPERPKT_L2_NEXT_DROP, - FLOWPERPKT_L2_NEXT_IP4_LOOKUP, - FLOWPERPKT_L2_N_NEXT, -} flowperpkt_l2_next_t; - -/** - * @brief add an entry to the flow record under construction - * @param vm vlib_main_t * current worker thread main structure pointer - * @param fm flowperpkt_main_t * flow-per-packet main structure pointer - * @param sw_if_index u32 interface handle - * @param tos u8 ToS bits from the packet - * @param timestamp u64 timestamp, nanoseconds since 1/1/70 - * @param length u16 ip length of the packet - * @param do_flush int 1 = flush all cached records, 0 = construct a record - */ - -static inline void -add_to_flow_record_l2 (vlib_main_t * vm, - vlib_node_runtime_t * node, - flowperpkt_main_t * fm, - u32 rx_sw_if_index, u32 tx_sw_if_index, - u8 * src_mac, u8 * dst_mac, - u16 ethertype, u64 timestamp, u16 length, int do_flush) -{ - u32 my_thread_index = vm->thread_index; - flow_report_main_t *frm = &flow_report_main; - ip4_header_t *ip; - udp_header_t *udp; - ip4_ipfix_template_packet_t *tp; - ipfix_message_header_t *h; - ipfix_set_header_t *s; - vlib_frame_t *f; - vlib_buffer_t *b0; - u16 offset; - u32 bi0; - vlib_buffer_free_list_t *fl; - - /* Find or allocate a buffer */ - b0 = fm->l2_buffers_per_worker[my_thread_index]; - - /* Need to allocate a buffer? */ - if (PREDICT_FALSE (b0 == 0)) - { - /* Nothing to flush */ - if (do_flush) - return; - - /* $$$$ drop counter? */ - if (vlib_buffer_alloc (vm, &bi0, 1) != 1) - return; - - /* Initialize the buffer */ - b0 = fm->l2_buffers_per_worker[my_thread_index] = - vlib_get_buffer (vm, bi0); - fl = - vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX); - vlib_buffer_init_for_free_list (b0, fl); - VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0); - offset = 0; - } - else - { - /* use the current buffer */ - bi0 = vlib_get_buffer_index (vm, b0); - offset = fm->l2_next_record_offset_per_worker[my_thread_index]; - } - - /* Find or allocate a frame */ - f = fm->l2_frames_per_worker[my_thread_index]; - if (PREDICT_FALSE (f == 0)) - { - u32 *to_next; - f = vlib_get_frame_to_node (vm, ip4_lookup_node.index); - fm->l2_frames_per_worker[my_thread_index] = f; - - /* Enqueue the buffer */ - to_next = vlib_frame_vector_args (f); - to_next[0] = bi0; - f->n_vectors = 1; - } - - /* Fresh packet, construct header */ - if (PREDICT_FALSE (offset == 0)) - { - flow_report_stream_t *stream; - - stream = &frm->streams[0]; - - b0->current_data = 0; - b0->current_length = sizeof (*ip) + sizeof (*udp) + sizeof (*h) + - sizeof (*s); - b0->flags |= (VLIB_BUFFER_TOTAL_LENGTH_VALID | VLIB_BUFFER_FLOW_REPORT); - vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = frm->fib_index; - - tp = vlib_buffer_get_current (b0); - ip = (ip4_header_t *) & tp->ip4; - udp = (udp_header_t *) (ip + 1); - h = (ipfix_message_header_t *) (udp + 1); - s = (ipfix_set_header_t *) (h + 1); - - ip->ip_version_and_header_length = 0x45; - ip->ttl = 254; - ip->protocol = IP_PROTOCOL_UDP; - ip->flags_and_fragment_offset = 0; - ip->src_address.as_u32 = frm->src_address.as_u32; - ip->dst_address.as_u32 = frm->ipfix_collector.as_u32; - udp->src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix); - udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix); - udp->checksum = 0; - - /* FIXUP: message header export_time */ - h->export_time = (u32) - (((f64) frm->unix_time_0) + - (vlib_time_now (frm->vlib_main) - frm->vlib_time_0)); - h->export_time = clib_host_to_net_u32 (h->export_time); - h->domain_id = clib_host_to_net_u32 (stream->domain_id); - - /* FIXUP: message header sequence_number */ - h->sequence_number = stream->sequence_number++; - h->sequence_number = clib_host_to_net_u32 (h->sequence_number); - - offset = (u32) (((u8 *) (s + 1)) - (u8 *) tp); - } - - /* Add data, unless we're flushing stale data */ - if (PREDICT_TRUE (do_flush == 0)) - { - - /* Add data */ - /* Ingress interface */ - { - u32 ingress_interface = clib_host_to_net_u32 (rx_sw_if_index); - clib_memcpy (b0->data + offset, &ingress_interface, - sizeof (ingress_interface)); - offset += sizeof (ingress_interface); - } - /* Egress interface */ - { - u32 egress_interface = clib_host_to_net_u32 (tx_sw_if_index); - clib_memcpy (b0->data + offset, &egress_interface, - sizeof (egress_interface)); - offset += sizeof (egress_interface); - } - /* src mac address */ - { - clib_memcpy (b0->data + offset, src_mac, 6); - offset += 6; - } - /* dst mac address */ - { - clib_memcpy (b0->data + offset, dst_mac, 6); - offset += 6; - } - - /* ethertype */ - b0->data[offset++] = ethertype >> 8; - b0->data[offset++] = ethertype & 0xFF; - - /* Timestamp */ - clib_memcpy (b0->data + offset, ×tamp, sizeof (f64)); - offset += sizeof (f64); - - /* pkt size */ - { - u16 pkt_size = clib_host_to_net_u16 (length); - clib_memcpy (b0->data + offset, &pkt_size, sizeof (pkt_size)); - offset += sizeof (pkt_size); - } - - b0->current_length += - /* 2*sw_if_index + 2*mac + ethertype + timestamp + length = 32 */ - 2 * sizeof (u32) + 12 + sizeof (u16) + sizeof (f64) + sizeof (u16); - - } - /* Time to flush the buffer? */ - if (PREDICT_FALSE - (do_flush || (offset + 2 * sizeof (u32) + 12 + sizeof (u16) + - +sizeof (f64) + sizeof (u16)) > frm->path_mtu)) - { - tp = vlib_buffer_get_current (b0); - ip = (ip4_header_t *) & tp->ip4; - udp = (udp_header_t *) (ip + 1); - h = (ipfix_message_header_t *) (udp + 1); - s = (ipfix_set_header_t *) (h + 1); - - s->set_id_length = ipfix_set_id_length (fm->l2_report_id, - b0->current_length - - (sizeof (*ip) + sizeof (*udp) + - sizeof (*h))); - h->version_length = version_length (b0->current_length - - (sizeof (*ip) + sizeof (*udp))); - - ip->length = clib_host_to_net_u16 (b0->current_length); - - ip->checksum = ip4_header_checksum (ip); - udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip)); - - if (frm->udp_checksum) - { - /* RFC 7011 section 10.3.2. */ - udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip); - if (udp->checksum == 0) - udp->checksum = 0xffff; - } - - ASSERT (ip->checksum == ip4_header_checksum (ip)); - - if (PREDICT_FALSE (vlib_get_trace_count (vm, node) > 0)) - { - vlib_trace_buffer (vm, node, FLOWPERPKT_L2_NEXT_IP4_LOOKUP, b0, - 0 /* follow chain */ ); - flowperpkt_l2_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - memset (t, 0, sizeof (*t)); - t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX]; - t->buffer_size = b0->current_length; - } - - vlib_put_frame_to_node (vm, ip4_lookup_node.index, - fm->l2_frames_per_worker[my_thread_index]); - fm->l2_frames_per_worker[my_thread_index] = 0; - fm->l2_buffers_per_worker[my_thread_index] = 0; - offset = 0; - } - - fm->l2_next_record_offset_per_worker[my_thread_index] = offset; -} - -void -flowperpkt_flush_callback_l2 (void) -{ - vlib_main_t *vm = vlib_get_main (); - flowperpkt_main_t *fm = &flowperpkt_main; - vlib_node_runtime_t *node; - node = vlib_node_get_runtime (vm, flowperpkt_l2_node.index); - - add_to_flow_record_l2 (vm, node, fm, 0 /* rx_sw_if_index */ , - 0 /* tx_sw_if_index */ , - 0 /* src mac */ , - 0 /* dst mac */ , - 0 /* ethertype */ , - 0ULL /* timestamp */ , - 0 /* length */ , - 1 /* do_flush */ ); -} - - -static uword -flowperpkt_l2_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - u32 n_left_from, *from, *to_next; - flowperpkt_l2_next_t next_index; - flowperpkt_main_t *fm = &flowperpkt_main; - u64 now; - - now = (u64) ((vlib_time_now (vm) - fm->vlib_time_0) * 1e9); - now += fm->nanosecond_time_0; - - from = vlib_frame_vector_args (frame); - n_left_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 next0 = FLOWPERPKT_L2_NEXT_DROP; - u32 next1 = FLOWPERPKT_L2_NEXT_DROP; - ethernet_header_t *eh0, *eh1; - u16 len0, len1; - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; - - /* 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, CLIB_CACHE_LINE_BYTES, STORE); - CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); - } - - /* speculatively enqueue b0 and b1 to the current next frame */ - to_next[0] = bi0 = from[0]; - to_next[1] = bi1 = from[1]; - from += 2; - to_next += 2; - n_left_from -= 2; - n_left_to_next -= 2; - - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); - - vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_TX], - &next0, b0); - vnet_feature_next (vnet_buffer (b1)->sw_if_index[VLIB_TX], - &next1, b1); - - eh0 = vlib_buffer_get_current (b0); - len0 = vlib_buffer_length_in_chain (vm, b0); - - if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_FLOW_REPORT) == 0)) - add_to_flow_record_l2 (vm, node, fm, - vnet_buffer (b0)->sw_if_index[VLIB_RX], - vnet_buffer (b0)->sw_if_index[VLIB_TX], - eh0->src_address, - eh0->dst_address, - eh0->type, now, len0, 0 /* flush */ ); - - eh1 = vlib_buffer_get_current (b0); - len1 = vlib_buffer_length_in_chain (vm, b0); - - if (PREDICT_TRUE ((b1->flags & VLIB_BUFFER_FLOW_REPORT) == 0)) - add_to_flow_record_l2 (vm, node, fm, - vnet_buffer (b1)->sw_if_index[VLIB_RX], - vnet_buffer (b1)->sw_if_index[VLIB_TX], - eh1->src_address, - eh1->dst_address, - eh1->type, now, len1, 0 /* flush */ ); - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) - { - if (b0->flags & VLIB_BUFFER_IS_TRACED) - { - flowperpkt_l2_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX]; - clib_memcpy (t->src_mac, eh0->src_address, 6); - clib_memcpy (t->dst_mac, eh0->dst_address, 6); - t->ethertype = clib_net_to_host_u16 (eh0->type); - t->timestamp = now; - t->buffer_size = len0; - } - if (b1->flags & VLIB_BUFFER_IS_TRACED) - { - flowperpkt_l2_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->rx_sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX]; - t->tx_sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX]; - clib_memcpy (t->src_mac, eh1->src_address, 6); - clib_memcpy (t->dst_mac, eh1->dst_address, 6); - t->ethertype = clib_net_to_host_u16 (eh1->type); - t->timestamp = now; - t->buffer_size = len1; - } - } - - /* verify speculative enqueues, maybe switch current next frame */ - 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 = FLOWPERPKT_L2_NEXT_DROP; - ethernet_header_t *eh0; - u16 len0; - - /* speculatively enqueue b0 to the current next frame */ - 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); - - vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_TX], - &next0, b0); - - eh0 = vlib_buffer_get_current (b0); - len0 = vlib_buffer_length_in_chain (vm, b0); - - if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_FLOW_REPORT) == 0)) - add_to_flow_record_l2 (vm, node, fm, - vnet_buffer (b0)->sw_if_index[VLIB_RX], - vnet_buffer (b0)->sw_if_index[VLIB_TX], - eh0->src_address, - eh0->dst_address, - eh0->type, now, len0, 0 /* flush */ ); - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - flowperpkt_l2_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX]; - clib_memcpy (t->src_mac, eh0->src_address, 6); - clib_memcpy (t->dst_mac, eh0->dst_address, 6); - t->ethertype = clib_net_to_host_u16 (eh0->type); - t->timestamp = now; - t->buffer_size = len0; - } - - /* 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); - } - return frame->n_vectors; -} - -/** - * @brief IPFIX l2 flow-per-packet graph node - * @node flowperpkt-l2 - * - * This is the IPFIX flow-record-per-packet node. - * - * @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 metadata, next index usage - * - * <em>Uses:</em> - * - <code>vnet_buffer(b)->ip.save_rewrite_length</code> - * - tells the node the length of the rewrite which was applied in - * ip4/6_rewrite_inline, allows the code to find the IP header without - * having to parse L2 headers, or make stupid assumptions about their - * length. - * - <code>vnet_buffer(b)->flags & VLIB_BUFFER_FLOW_REPORT</code> - * - Used to suppress flow record generation for flow record packets. - * - * <em>Sets:</em> - * - <code>vnet_buffer(b)->flags & VLIB_BUFFER_FLOW_REPORT</code> - * - To suppress flow record generation for flow record packets - * - * <em>Next Index:</em> - * - Next configured output feature on the interface, usually - * "interface-output." Generated flow records head for ip4-lookup - */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (flowperpkt_l2_node) = { - .function = flowperpkt_l2_node_fn, - .name = "flowperpkt-l2", - .vector_size = sizeof (u32), - .format_trace = format_flowperpkt_l2_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(flowperpkt_l2_error_strings), - .error_strings = flowperpkt_l2_error_strings, - - .n_next_nodes = FLOWPERPKT_L2_N_NEXT, - - /* edit / add dispositions here */ - .next_nodes = { - [FLOWPERPKT_L2_NEXT_DROP] = "error-drop", - [FLOWPERPKT_L2_NEXT_IP4_LOOKUP] = "ip4-lookup", - }, -}; -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |