diff options
Diffstat (limited to 'src/plugins/mactime/node.c')
| -rw-r--r-- | src/plugins/mactime/node.c | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/src/plugins/mactime/node.c b/src/plugins/mactime/node.c new file mode 100644 index 00000000000..b112a7251cf --- /dev/null +++ b/src/plugins/mactime/node.c @@ -0,0 +1,363 @@ +/* + * node.c - skeleton vpp engine plug-in dual-loop node skeleton + * + * 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 <mactime/mactime.h> + +typedef struct +{ + u32 next_index; + u32 device_index; + u8 src_mac[6]; + u8 device_name[64]; +} mactime_trace_t; + +static u8 * +format_mac_address (u8 * s, va_list * args) +{ + u8 *a = va_arg (*args, u8 *); + return format (s, "%02x:%02x:%02x:%02x:%02x:%02x", + a[0], a[1], a[2], a[3], a[4], a[5]); +} + +vlib_node_registration_t mactime_node; + +#define foreach_mactime_error \ +_(DROP, "Dropped packets") \ +_(OK, "Permitted packets") + +typedef enum +{ +#define _(sym,str) MACTIME_ERROR_##sym, + foreach_mactime_error +#undef _ + MACTIME_N_ERROR, +} mactime_error_t; + +static char *mactime_error_strings[] = { +#define _(sym,string) string, + foreach_mactime_error +#undef _ +}; + +typedef enum +{ + MACTIME_NEXT_ETHERNET_INPUT, + MACTIME_NEXT_DROP, + MACTIME_N_NEXT, +} mactime_next_t; + +/* packet trace format function */ +static u8 * +format_mactime_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 *); + mactime_trace_t *t = va_arg (*args, mactime_trace_t *); + + s = format (s, "MACTIME: src mac %U device %s result %s\n", + format_mac_address, t->src_mac, + (t->device_index != ~0) ? t->device_name : (u8 *) "unknown", + t->next_index == MACTIME_NEXT_ETHERNET_INPUT ? "pass" : "drop"); + return s; +} + +static uword +mactime_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + u32 n_left_from, *from, *to_next; + mactime_next_t next_index; + mactime_main_t *mm = &mactime_main; + mactime_device_t *dp; + clib_bihash_kv_8_8_t kv; + clib_bihash_8_8_t *lut = &mm->lookup_table; + u32 packets_ok = 0, packets_dropped = 0; + f64 now; + u32 thread_index = vm->thread_index; + + now = clib_timebase_now (&mm->timebase); + + if (PREDICT_FALSE ((now - mm->sunday_midnight) > 86400.0 * 7.0)) + mm->sunday_midnight = clib_timebase_find_sunday_midnight (now); + + 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); + +#if 0 + while (n_left_from >= 4 && n_left_to_next >= 2) + { + u32 next0 = MACTIME_NEXT_INTERFACE_OUTPUT; + u32 next1 = MACTIME_NEXT_INTERFACE_OUTPUT; + u32 sw_if_index0, sw_if_index1; + u8 tmp0[6], tmp1[6]; + ethernet_header_t *en0, *en1; + 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); + + ASSERT (b0->current_data == 0); + ASSERT (b1->current_data == 0); + + en0 = vlib_buffer_get_current (b0); + en1 = vlib_buffer_get_current (b1); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; + + /* Send pkt back out the RX interface */ + vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index0; + vnet_buffer (b1)->sw_if_index[VLIB_TX] = sw_if_index1; + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + mactime_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + clib_memcpy (t->new_src_mac, en0->src_address, + sizeof (t->new_src_mac)); + clib_memcpy (t->new_dst_mac, en0->dst_address, + sizeof (t->new_dst_mac)); + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + mactime_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->sw_if_index = sw_if_index1; + t->next_index = next1; + clib_memcpy (t->new_src_mac, en1->src_address, + sizeof (t->new_src_mac)); + clib_memcpy (t->new_dst_mac, en1->dst_address, + sizeof (t->new_dst_mac)); + } + } + + /* 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); + } +#endif /* dual loop */ + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + u32 next0 = MACTIME_NEXT_ETHERNET_INPUT; + u32 device_index0; + ethernet_header_t *en0; + int i; + + /* 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); + + vlib_buffer_advance (b0, -(word) vnet_buffer (b0)->l2_hdr_offset); + + en0 = vlib_buffer_get_current (b0); + kv.key = 0; + clib_memcpy (&kv.key, en0->src_address, 6); + + + /* Lookup the src mac address */ + if (clib_bihash_search_8_8 (lut, &kv, &kv) < 0) + { + device_index0 = ~0; + dp = 0; + goto trace0; + } + else + device_index0 = kv.value; + + dp = pool_elt_at_index (mm->devices, device_index0); + + /* Static drop / allow? */ + if (PREDICT_FALSE + (dp->flags & + (MACTIME_DEVICE_FLAG_STATIC_DROP + | MACTIME_DEVICE_FLAG_STATIC_ALLOW))) + { + if (dp->flags & MACTIME_DEVICE_FLAG_STATIC_DROP) + { + next0 = MACTIME_NEXT_DROP; + vlib_increment_simple_counter + (&mm->drop_counters, thread_index, dp - mm->devices, 1); + packets_dropped++; + } + else /* note next0 set to allow */ + { + vlib_increment_simple_counter + (&mm->allow_counters, thread_index, dp - mm->devices, 1); + packets_ok++; + } + goto trace0; + } + + /* Known device, see if traffic allowed at the moment */ + for (i = 0; i < vec_len (dp->ranges); i++) + { + clib_timebase_range_t *r = dp->ranges + i; + f64 start0, end0; + + start0 = r->start + mm->sunday_midnight; + end0 = r->end + mm->sunday_midnight; + /* Packet within time range */ + if (now >= start0 && now <= end0) + { + /* And it's a drop range, drop it */ + if (dp->flags & MACTIME_DEVICE_FLAG_DYNAMIC_DROP) + { + vlib_increment_simple_counter + (&mm->drop_counters, thread_index, + dp - mm->devices, 1); + packets_dropped++; + next0 = MACTIME_NEXT_DROP; + } + else /* it's an allow range, allow it */ + { + vlib_increment_simple_counter + (&mm->allow_counters, thread_index, + dp - mm->devices, 1); + packets_ok++; + } + goto trace0; + } + } + /* + * Didn't hit a range, so *drop* if allow configured, or + * *allow* if drop configured. + */ + if (dp->flags & MACTIME_DEVICE_FLAG_DYNAMIC_ALLOW) + { + next0 = MACTIME_NEXT_DROP; + vlib_increment_simple_counter + (&mm->drop_counters, thread_index, dp - mm->devices, 1); + packets_dropped++; + } + else + { + vlib_increment_simple_counter + (&mm->allow_counters, thread_index, dp - mm->devices, 1); + packets_ok++; + } + + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + mactime_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + clib_memcpy (t->src_mac, en0->src_address, sizeof (t->src_mac)); + + t->next_index = next0; + t->device_index = device_index0; + + if (dp) + { + clib_memcpy (t->device_name, dp->device_name, + ARRAY_LEN (t->device_name)); + t->device_name[ARRAY_LEN (t->device_name) - 1] = 0; + } + } + + /* 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, mactime_node.index, + MACTIME_ERROR_DROP, packets_dropped); + vlib_node_increment_counter (vm, mactime_node.index, + MACTIME_ERROR_OK, packets_ok); + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (mactime_node) = +{ + .function = mactime_node_fn, + .name = "mactime", + .vector_size = sizeof (u32), + .format_trace = format_mactime_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(mactime_error_strings), + .error_strings = mactime_error_strings, + + .n_next_nodes = MACTIME_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = + { + [MACTIME_NEXT_ETHERNET_INPUT] = "ethernet-input", + [MACTIME_NEXT_DROP] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |