2 * Copyright (c) 2017 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 #include <vnet/bonding/node.h>
18 #include <lacp/node.h>
21 lacp_packet_scan (vlib_main_t * vm, slave_if_t * sif)
23 lacp_pdu_t *lacpdu = (lacp_pdu_t *) sif->last_rx_pkt;
25 if (lacpdu->subtype != LACP_SUBTYPE)
26 return LACP_ERROR_UNSUPPORTED;
29 * According to the spec, no checking on the version number and tlv types.
30 * But we may check the tlv lengths.
32 if ((lacpdu->actor.tlv_length != sizeof (lacp_actor_partner_t)) ||
33 (lacpdu->partner.tlv_length != sizeof (lacp_actor_partner_t)) ||
34 (lacpdu->collector.tlv_length != sizeof (lacp_collector_t)) ||
35 (lacpdu->terminator.tlv_length != 0))
36 return (LACP_ERROR_BAD_TLV);
38 lacp_machine_dispatch (&lacp_rx_machine, vm, sif,
39 LACP_RX_EVENT_PDU_RECEIVED, &sif->rx_state);
41 return LACP_ERROR_NONE;
45 marker_fill_pdu (marker_pdu_t * marker, slave_if_t * sif)
47 marker_pdu_t *pkt = (marker_pdu_t *) sif->last_marker_pkt;
49 marker->marker_info = pkt->marker_info;
50 marker->marker_info.tlv_type = MARKER_RESPONSE_INFORMATION;
54 marker_fill_request_pdu (marker_pdu_t * marker, slave_if_t * sif)
56 marker->marker_info.tlv_type = MARKER_INFORMATION;
57 marker->marker_info.requester_port = sif->actor.port_number;
58 clib_memcpy (marker->marker_info.requester_system, sif->actor.system, 6);
59 marker->marker_info.requester_transaction_id = sif->marker_tx_id;
64 send_ethernet_marker_response_pdu (slave_if_t * sif)
66 lacp_main_t *lm = &lacp_main;
68 ethernet_marker_pdu_t *h0;
69 vnet_hw_interface_t *hw;
73 vlib_main_t *vm = lm->vlib_main;
74 vnet_main_t *vnm = lm->vnet_main;
77 * see lacp_periodic_init() to understand what's already painted
78 * into the buffer by the packet template mechanism
80 h0 = vlib_packet_template_get_packet
81 (vm, &lm->marker_packet_templates[sif->packet_template_index], &bi0);
86 /* Add the interface's ethernet source address */
87 hw = vnet_get_sup_hw_interface (vnm, sif->sw_if_index);
89 clib_memcpy (h0->ethernet.src_address, hw->hw_address,
90 vec_len (hw->hw_address));
92 marker_fill_pdu (&h0->marker, sif);
94 /* Set the outbound packet length */
95 b0 = vlib_get_buffer (vm, bi0);
96 b0->current_length = sizeof (ethernet_marker_pdu_t);
98 b0->total_length_not_including_first_buffer = 0;
100 /* And the outbound interface */
101 vnet_buffer (b0)->sw_if_index[VLIB_TX] = hw->sw_if_index;
103 /* And output the packet on the correct interface */
104 f = vlib_get_frame_to_node (vm, hw->output_node_index);
106 to_next = vlib_frame_vector_args (f);
110 vlib_put_frame_to_node (vm, hw->output_node_index, f);
114 handle_marker_protocol (vlib_main_t * vm, slave_if_t * sif)
116 marker_pdu_t *marker = (marker_pdu_t *) sif->last_marker_pkt;
119 * According to the spec, no checking on the version number and tlv types.
120 * But we may check the tlv lengths.
122 if ((marker->marker_info.tlv_length != sizeof (marker_information_t)) ||
123 (marker->terminator.tlv_length != 0))
124 return (LACP_ERROR_BAD_TLV);
126 send_ethernet_marker_response_pdu (sif);
128 return LACP_ERROR_NONE;
135 lacp_input (vlib_main_t * vm, vlib_buffer_t * b0, u32 bi0)
137 lacp_main_t *lm = &lacp_main;
141 marker_pdu_t *marker;
142 uword last_packet_signature;
146 bond_get_slave_by_sw_if_index (vnet_buffer (b0)->sw_if_index[VLIB_RX]);
147 if ((sif == 0) || (sif->mode != BOND_MODE_LACP))
149 return LACP_ERROR_DISABLED;
152 /* Handle marker protocol */
153 marker = (marker_pdu_t *) (b0->data + b0->current_data);
154 if (marker->subtype == MARKER_SUBTYPE)
156 if (sif->last_marker_pkt)
157 _vec_len (sif->last_marker_pkt) = 0;
158 vec_validate (sif->last_marker_pkt,
159 vlib_buffer_length_in_chain (vm, b0) - 1);
160 nbytes = vlib_buffer_contents (vm, bi0, sif->last_marker_pkt);
161 ASSERT (nbytes <= vec_len (sif->last_marker_pkt));
162 if (nbytes < sizeof (lacp_pdu_t))
163 return LACP_ERROR_TOO_SMALL;
164 return (handle_marker_protocol (vm, sif));
168 * typical clib idiom. Don't repeatedly allocate and free
169 * the per-neighbor rx buffer. Reset its apparent length to zero
172 if (sif->last_rx_pkt)
173 _vec_len (sif->last_rx_pkt) = 0;
176 * Make sure the per-neighbor rx buffer is big enough to hold
177 * the data we're about to copy
179 vec_validate (sif->last_rx_pkt, vlib_buffer_length_in_chain (vm, b0) - 1);
182 * Coalesce / copy the buffer chain into the per-neighbor
185 nbytes = vlib_buffer_contents (vm, bi0, sif->last_rx_pkt);
186 ASSERT (nbytes <= vec_len (sif->last_rx_pkt));
188 if (nbytes < sizeof (lacp_pdu_t))
190 return LACP_ERROR_TOO_SMALL;
193 last_packet_signature =
194 hash_memory (sif->last_rx_pkt, vec_len (sif->last_rx_pkt), 0xd00b);
196 bif = bond_get_master_by_dev_instance (sif->bif_dev_instance);
197 if (sif->last_packet_signature_valid &&
198 (sif->last_packet_signature == last_packet_signature) &&
199 hash_get (bif->active_slave_by_sw_if_index, sif->sw_if_index))
201 lacp_start_current_while_timer (lm->vlib_main, sif,
202 sif->ttl_in_seconds);
203 e = LACP_ERROR_CACHE_HIT;
207 /* Actually scan the packet */
208 e = lacp_packet_scan (vm, sif);
209 sif->last_packet_signature_valid = 1;
210 sif->last_packet_signature = last_packet_signature;
213 if (sif->last_rx_pkt)
214 _vec_len (sif->last_rx_pkt) = 0;
220 * setup neighbor hash table
222 static clib_error_t *
223 lacp_init (vlib_main_t * vm)
227 if ((error = vlib_call_init_function (vm, lacp_periodic_init)))
233 VLIB_INIT_FUNCTION (lacp_init);
236 * packet trace format function, very similar to
237 * lacp_packet_scan except that we call the per TLV format
238 * functions instead of the per TLV processing functions
241 lacp_input_format_trace (u8 * s, va_list * args)
243 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
244 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
245 lacp_input_trace_t *t = va_arg (*args, lacp_input_trace_t *);
246 lacp_pdu_t *lacpdu = &t->pkt.lacpdu;
247 marker_pdu_t *marker = &t->pkt.marker;
250 lacp_state_struct *state_entry;
252 s = format (s, "%U:\n", format_vnet_sw_if_index_name, vnet_get_main (),
254 s = format (s, "Length: %d\n", t->len);
255 if (t->len >= sizeof (lacp_pdu_t))
257 switch (lacpdu->subtype)
260 if (marker->version_number == MARKER_PROTOCOL_VERSION)
261 s = format (s, " Markerv1\n");
263 s = format (s, " Subtype %u, Version %u\n", marker->subtype,
264 marker->version_number);
265 s = format (s, " Marker Information TLV: type %u\n",
266 marker->marker_info.tlv_type);
267 s = format (s, " Marker Information TLV: length %u\n",
268 marker->marker_info.tlv_length);
269 s = format (s, " Requester port: %u\n",
270 marker->marker_info.requester_port);
271 s = format (s, " Requester system: %U\n", format_ethernet_address,
272 marker->marker_info.requester_system);
273 s = format (s, " Requester transaction ID: %u\n",
274 marker->marker_info.requester_transaction_id);
278 if (lacpdu->version_number == LACP_ACTOR_LACP_VERSION)
279 s = format (s, " LACPv1\n");
281 s = format (s, " Subtype %u, Version %u\n", lacpdu->subtype,
282 lacpdu->version_number);
283 s = format (s, " Actor Information TLV: length %u\n",
284 lacpdu->actor.tlv_length);
285 s = format (s, " System %U\n", format_ethernet_address,
286 lacpdu->actor.port_info.system);
287 s = format (s, " System priority %u\n",
288 ntohs (lacpdu->actor.port_info.system_priority));
289 s = format (s, " Key %u\n", ntohs (lacpdu->actor.port_info.key));
290 s = format (s, " Port priority %u\n",
291 ntohs (lacpdu->actor.port_info.port_priority));
292 s = format (s, " Port number %u\n",
293 ntohs (lacpdu->actor.port_info.port_number));
294 s = format (s, " State 0x%x\n", lacpdu->actor.port_info.state);
295 state_entry = (lacp_state_struct *) & lacp_state_array;
296 while (state_entry->str)
298 if (lacpdu->actor.port_info.state & (1 << state_entry->bit))
299 s = format (s, " %s (%d)\n", state_entry->str,
304 s = format (s, " Partner Information TLV: length %u\n",
305 lacpdu->partner.tlv_length);
306 s = format (s, " System %U\n", format_ethernet_address,
307 lacpdu->partner.port_info.system);
308 s = format (s, " System priority %u\n",
309 ntohs (lacpdu->partner.port_info.system_priority));
311 format (s, " Key %u\n", ntohs (lacpdu->partner.port_info.key));
313 format (s, " Port priority %u\n",
314 ntohs (lacpdu->partner.port_info.port_priority));
316 format (s, " Port number %u\n",
317 ntohs (lacpdu->partner.port_info.port_number));
318 s = format (s, " State 0x%x\n", lacpdu->partner.port_info.state);
319 state_entry = (lacp_state_struct *) & lacp_state_array;
320 while (state_entry->str)
322 if (lacpdu->partner.port_info.state & (1 << state_entry->bit))
323 s = format (s, " %s (%d)\n", state_entry->str,
334 if (t->len > sizeof (lacp_pdu_t))
335 len = sizeof (lacp_pdu_t);
339 for (i = 0; i < len; i++)
344 s = format (s, "\n");
345 s = format (s, " 0x%04x: ", i);
349 s = format (s, "%02x", p[i]);
356 * fd.io coding-style-patch-verification: ON
359 * eval: (c-set-style "gnu")