+++ /dev/null
-/*
- * Copyright (c) 2011-2016 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.
- */
-/**
- * @file
- * @brief LLDP nodes implementation
- */
-#include <vnet/lldp/lldp_node.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/ethernet/packet.h>
-
-/* set this to 1 to turn on debug prints via clib_warning() */
-#define LLDP_DEBUG (0)
-
-static vlib_node_registration_t lldp_process_node;
-
-#define F(sym, string) static char LLDP_ERR_##sym##_STR[] = string;
-foreach_lldp_error (F);
-#undef F
-
-/*
- * packet counter strings
- * Dump these counters via the "show error" CLI command
- */
-static char *lldp_error_strings[] = {
-#define F(sym, string) LLDP_ERR_##sym##_STR,
- foreach_lldp_error (F)
-#undef F
-};
-
-/*
- * We actually send all lldp 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
-{
- LLDP_INPUT_NEXT_NORMAL,
- LLDP_INPUT_N_NEXT,
-} lldp_next_t;
-
-/*
- * Process a frame of lldp packets
- * Expect 1 packet / frame
- */
-static uword
-lldp_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, *from;
- lldp_input_trace_t *t0;
-
- 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 = LLDP_INPUT_NEXT_NORMAL;
-
- /* scan this lldp pkt. error0 is the counter index to bump */
- error0 = lldp_input (vm, b0, bi0);
- b0->error = node->errors[error0];
-
- /* If this pkt is traced, snapshot the data */
- if (b0->flags & VLIB_BUFFER_IS_TRACED)
- {
- int len;
- t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
- len = (b0->current_length < sizeof (t0->data)) ? b0->current_length
- : sizeof (t0->data);
- t0->len = len;
- clib_memcpy_fast (t0->data, 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;
-}
-
-/*
- * lldp input graph node declaration
- */
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE(lldp_input_node, static) = {
- .function = lldp_node_fn,
- .name = "lldp-input",
- .vector_size = sizeof(u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = LLDP_N_ERROR,
- .error_strings = lldp_error_strings,
-
- .format_trace = lldp_input_format_trace,
-
- .n_next_nodes = LLDP_INPUT_N_NEXT,
- .next_nodes =
- {
- [LLDP_INPUT_NEXT_NORMAL] = "error-drop",
- },
-};
-/* *INDENT-ON* */
-
-/*
- * lldp process node function
- */
-static uword
-lldp_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
-{
- lldp_main_t *lm = &lldp_main;
- f64 timeout = 0;
- uword event_type, *event_data = 0;
-
- /* So we can send events to the lldp process */
- lm->lldp_process_node_index = lldp_process_node.index;
-
- /* with ethernet input */
- ethernet_register_input_type (vm, ETHERNET_TYPE_802_1_LLDP /* LLDP */ ,
- lldp_input_node.index);
-
- while (1)
- {
- if (vec_len (lm->intfs_timeouts))
- {
-#if LLDP_DEBUG
- clib_warning ("DEBUG: wait for event with timeout %f", timeout);
-#endif
- (void) vlib_process_wait_for_event_or_clock (vm, timeout);
- }
- else
- {
-#if LLDP_DEBUG
- clib_warning ("DEBUG: wait for event without timeout");
-#endif
- (void) vlib_process_wait_for_event (vm);
- }
- event_type = vlib_process_get_events (vm, &event_data);
- switch (event_type)
- {
- case ~0: /* no events => timeout */
- /* nothing to do here */
- break;
- case LLDP_EVENT_RESCHEDULE:
- /* nothing to do here - reschedule is done automatically after
- * each event or timeout */
- break;
- default:
- clib_warning ("BUG: event type 0x%wx", event_type);
- break;
- }
- if (!vec_len (lm->intfs_timeouts))
- {
- continue;
- }
- /* send packet(s) and schedule another timeout */
- const f64 now = vlib_time_now (lm->vlib_main);
- while (1)
- {
- lldp_intf_t *n = pool_elt_at_index (lm->intfs,
- lm->intfs_timeouts
- [lm->intfs_timeouts_idx]);
- if (n->last_sent < 0.01 || now > n->last_sent + lm->msg_tx_interval)
- {
-#if LLDP_DEBUG
- clib_warning ("send packet to lldp %p, if idx %d", n,
- n->hw_if_index);
-#endif
- lldp_send_ethernet (lm, n, 0);
- ++lm->intfs_timeouts_idx;
- if (lm->intfs_timeouts_idx >= vec_len (lm->intfs_timeouts))
- {
- lm->intfs_timeouts_idx = 0;
- }
- continue;
- }
- else
- {
- timeout = n->last_sent + lm->msg_tx_interval - now;
- break;
- }
- }
-#if LLDP_DEBUG
- clib_warning ("DEBUG: timeout set to %f", timeout);
- u8 *s = NULL;
- u32 i;
- vec_foreach_index (i, lm->intfs_timeouts)
- {
- if (i == lm->intfs_timeouts_idx)
- {
- s = format (s, " [%d]", lm->intfs_timeouts[i]);
- }
- else
- {
- s = format (s, " %d", lm->intfs_timeouts[i]);
- }
- }
- clib_warning ("DEBUG: timeout schedule: %s", s);
- vec_free (s);
-#endif
- if (event_data)
- {
- _vec_len (event_data) = 0;
- }
- }
-
- return 0;
-}
-
-/*
- * lldp process node declaration
- */
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE(lldp_process_node, static) = {
- .function = lldp_process,
- .type = VLIB_NODE_TYPE_PROCESS,
- .name = "lldp-process",
-};
-/* *INDENT-ON* */
-
-void
-lldp_schedule_intf (lldp_main_t * lm, lldp_intf_t * n)
-{
- const int idx = n - lm->intfs;
- u32 v;
- vec_foreach_index (v, lm->intfs_timeouts)
- {
- if (lm->intfs_timeouts[v] == idx)
- {
- /* already scheduled */
- return;
- }
- }
- n->last_sent = 0; /* ensure that a packet is sent out immediately */
- /* put the interface at the current position in the timeouts - it
- * will timeout immediately */
- vec_insert (lm->intfs_timeouts, 1, lm->intfs_timeouts_idx);
- lm->intfs_timeouts[lm->intfs_timeouts_idx] = n - lm->intfs;
- vlib_process_signal_event (lm->vlib_main, lm->lldp_process_node_index,
- LLDP_EVENT_RESCHEDULE, 0);
-#if LLDP_DEBUG
- clib_warning ("DEBUG: schedule interface %p, if idx %d", n, n->hw_if_index);
-#endif
-}
-
-void
-lldp_unschedule_intf (lldp_main_t * lm, lldp_intf_t * n)
-{
- if (!n)
- {
- return;
- }
-#if LLDP_DEBUG
- clib_warning ("DEBUG: unschedule interface %p, if idx %d", n,
- n->hw_if_index);
-#endif
- const int idx = n - lm->intfs;
- u32 v;
- /* remove intf index from timeouts vector */
- vec_foreach_index (v, lm->intfs_timeouts)
- {
- if (lm->intfs_timeouts[v] == idx)
- {
- vec_delete (lm->intfs_timeouts, 1, v);
- break;
- }
- }
- /* wrap current timeout index to first element if needed */
- if (lm->intfs_timeouts_idx >= vec_len (lm->intfs_timeouts))
- {
- lm->intfs_timeouts_idx = 0;
- }
- vlib_process_signal_event (lm->vlib_main, lm->lldp_process_node_index,
- LLDP_EVENT_RESCHEDULE, 0);
-}
-
-static clib_error_t *
-lldp_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
-{
- lldp_main_t *lm = &lldp_main;
- vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
- lldp_intf_t *n = lldp_get_intf (lm, hi->hw_if_index);
- if (n)
- {
- if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
- {
- /* FIXME - the packet sent here isn't send properly - need to find a
- * way to send the packet before interface goes down */
- lldp_send_ethernet (lm, n, 1);
- lldp_unschedule_intf (lm, n);
- }
- }
- return 0;
-}
-
-VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (lldp_sw_interface_up_down);
-
-static clib_error_t *
-lldp_hw_interface_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
-{
- lldp_main_t *lm = &lldp_main;
- lldp_intf_t *n = lldp_get_intf (lm, hw_if_index);
- if (n)
- {
- if (flags & VNET_HW_INTERFACE_FLAG_LINK_UP)
- {
- lldp_schedule_intf (lm, n);
- }
- }
- return 0;
-}
-
-VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (lldp_hw_interface_up_down);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff