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/*
 * Copyright (c) 2015 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.
 */
/*
  Copyright (c) 2005 Eliot Dresselhaus

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef included_clib_unix_h
#define included_clib_unix_h

#include <vppinfra/error.h>

/* Number of bytes in a Unix file. */
clib_error_t *clib_file_n_bytes (char *file, uword * result);

/* Read file contents into given buffer. */
clib_error_t *clib_file_read_contents (char *file, u8 * result,
				       uword n_bytes);

/* Read and return contents of Unix file. */
clib_error_t *clib_file_contents (char *file, u8 ** result);

/* As above but for /proc file system on Linux. */
clib_error_t *unix_proc_file_contents (char *file, u8 ** result);

#endif /* included_clib_unix_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
pan> * See the License for the specific language governing permissions and * limitations under the License. */ #define _GNU_SOURCE #include <vnet/bonding/node.h> #include <vnet/ethernet/packet.h> #include <lacp/node.h> lacp_state_struct lacp_state_array[] = { #define _(b, s, n) {.bit = b, .str = #s, }, foreach_lacp_state_flag #undef _ {.str = NULL} }; static vlib_node_registration_t lacp_process_node; /** \file 2 x LACP graph nodes: an "interior" node to process incoming announcements, and a "process" node to periodically send announcements. The interior node is neither pipelined nor dual-looped, because it would be very unusual to see more than one LACP packet in a given input frame. So, it's a very simple / straighforward example. */ /* * packet counter strings * Dump these counters via the "show error" CLI command */ static char *lacp_error_strings[] = { #define _(sym,string) string, foreach_lacp_error #undef _ }; /* * We actually send all lacp pkts to the "error" node after scanning * them, so the graph node has only one next-index. The "error-drop" * node automatically bumps our per-node packet counters for us. */ typedef enum { LACP_INPUT_NEXT_NORMAL, LACP_INPUT_N_NEXT, } lacp_next_t; /* * Process a frame of lacp packets * Expect 1 packet / frame */ static uword lacp_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, *from; lacp_input_trace_t *t0; uword n_trace = vlib_get_trace_count (vm, node); from = vlib_frame_vector_args (frame); /* array of buffer indices */ n_left_from = frame->n_vectors; /* number of buffer indices */ while (n_left_from > 0) { u32 bi0; vlib_buffer_t *b0; u32 next0, error0; bi0 = from[0]; b0 = vlib_get_buffer (vm, bi0); next0 = LACP_INPUT_NEXT_NORMAL; /* scan this lacp pkt. error0 is the counter index to bump */ error0 = lacp_input (vm, b0, bi0); b0->error = node->errors[error0]; /* If this pkt is traced, snapshoot the data */ if (PREDICT_FALSE (n_trace > 0)) { int len; vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0); vlib_set_trace_count (vm, node, --n_trace); t0 = vlib_add_trace (vm, node, b0, sizeof (*t0)); len = (b0->current_length < sizeof (t0->pkt)) ? b0->current_length : sizeof (t0->pkt); t0->len = len; t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; clib_memcpy_fast (&t0->pkt, vlib_buffer_get_current (b0), len); } /* push this pkt to the next graph node, always error-drop */ vlib_set_next_frame_buffer (vm, node, next0, bi0); from += 1; n_left_from -= 1; } return frame->n_vectors; } /* * lacp input graph node declaration */ /* *INDENT-OFF* */ VLIB_REGISTER_NODE (lacp_input_node, static) = { .function = lacp_node_fn, .name = "lacp-input", .vector_size = sizeof (u32), .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = LACP_N_ERROR, .error_strings = lacp_error_strings, .format_trace = lacp_input_format_trace, .n_next_nodes = LACP_INPUT_N_NEXT, .next_nodes = { [LACP_INPUT_NEXT_NORMAL] = "error-drop", }, }; /* *INDENT-ON* */ /* * lacp periodic function */ static uword lacp_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { lacp_main_t *lm = &lacp_main; f64 poll_time_remaining; uword event_type, *event_data = 0; u8 enabled = 0; /* So we can send events to the lacp process */ lm->lacp_process_node_index = lacp_process_node.index; ethernet_register_input_type (vm, ETHERNET_TYPE_SLOW_PROTOCOLS /* LACP */ , lacp_input_node.index); poll_time_remaining = 0.2; while (1) { if (enabled) poll_time_remaining = vlib_process_wait_for_event_or_clock (vm, poll_time_remaining); else vlib_process_wait_for_event (vm); event_type = vlib_process_get_events (vm, &event_data); switch (event_type) { case ~0: /* no events => timeout */ break; case LACP_PROCESS_EVENT_START: enabled = 1; break; case LACP_PROCESS_EVENT_STOP: enabled = 0; continue; default: clib_warning ("BUG: event type 0x%wx", event_type); break; } if (event_data) _vec_len (event_data) = 0; if (vlib_process_suspend_time_is_zero (poll_time_remaining)) { lacp_periodic (vm); poll_time_remaining = 0.2; } } return 0; } /* * lacp periodic node declaration */ /* *INDENT-OFF* */ VLIB_REGISTER_NODE (lacp_process_node, static) = { .function = lacp_process, .type = VLIB_NODE_TYPE_PROCESS, .name = "lacp-process", }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */