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);
111 sif->last_marker_pdu_sent_time = vlib_time_now (lm->vlib_main);
112 sif->marker_pdu_sent++;
116 handle_marker_protocol (vlib_main_t * vm, slave_if_t * sif)
118 marker_pdu_t *marker = (marker_pdu_t *) sif->last_marker_pkt;
121 * According to the spec, no checking on the version number and tlv types.
122 * But we may check the tlv lengths.
124 if ((marker->marker_info.tlv_length != sizeof (marker_information_t)) ||
125 (marker->terminator.tlv_length != 0))
126 return (LACP_ERROR_BAD_TLV);
128 send_ethernet_marker_response_pdu (sif);
130 return LACP_ERROR_NONE;
137 lacp_input (vlib_main_t * vm, vlib_buffer_t * b0, u32 bi0)
139 lacp_main_t *lm = &lacp_main;
143 marker_pdu_t *marker;
144 uword last_packet_signature;
147 bond_get_slave_by_sw_if_index (vnet_buffer (b0)->sw_if_index[VLIB_RX]);
148 if ((sif == 0) || (sif->mode != BOND_MODE_LACP))
150 return LACP_ERROR_DISABLED;
153 /* Handle marker protocol */
154 marker = (marker_pdu_t *) (b0->data + b0->current_data);
155 if (marker->subtype == MARKER_SUBTYPE)
157 sif->last_marker_pdu_recd_time = vlib_time_now (lm->vlib_main);
158 if (sif->last_marker_pkt)
159 _vec_len (sif->last_marker_pkt) = 0;
160 vec_validate (sif->last_marker_pkt,
161 vlib_buffer_length_in_chain (vm, b0) - 1);
162 nbytes = vlib_buffer_contents (vm, bi0, sif->last_marker_pkt);
163 ASSERT (nbytes <= vec_len (sif->last_marker_pkt));
164 if (nbytes < sizeof (lacp_pdu_t))
166 sif->marker_bad_pdu_received++;
167 return LACP_ERROR_TOO_SMALL;
169 e = handle_marker_protocol (vm, sif);
170 sif->marker_pdu_received++;
175 * typical clib idiom. Don't repeatedly allocate and free
176 * the per-neighbor rx buffer. Reset its apparent length to zero
179 if (sif->last_rx_pkt)
180 _vec_len (sif->last_rx_pkt) = 0;
183 * Make sure the per-neighbor rx buffer is big enough to hold
184 * the data we're about to copy
186 vec_validate (sif->last_rx_pkt, vlib_buffer_length_in_chain (vm, b0) - 1);
189 * Coalesce / copy the buffer chain into the per-neighbor
192 nbytes = vlib_buffer_contents (vm, bi0, sif->last_rx_pkt);
193 ASSERT (nbytes <= vec_len (sif->last_rx_pkt));
195 sif->last_lacpdu_recd_time = vlib_time_now (lm->vlib_main);
196 if (nbytes < sizeof (lacp_pdu_t))
198 sif->bad_pdu_received++;
199 return LACP_ERROR_TOO_SMALL;
202 last_packet_signature =
203 hash_memory (sif->last_rx_pkt, vec_len (sif->last_rx_pkt), 0xd00b);
205 if (sif->last_packet_signature_valid &&
206 (sif->last_packet_signature == last_packet_signature) &&
207 ((sif->actor.state & LACP_STEADY_STATE) == LACP_STEADY_STATE))
209 lacp_start_current_while_timer (lm->vlib_main, sif,
210 sif->ttl_in_seconds);
211 e = LACP_ERROR_CACHE_HIT;
215 /* Actually scan the packet */
216 e = lacp_packet_scan (vm, sif);
217 sif->last_packet_signature_valid = 1;
218 sif->last_packet_signature = last_packet_signature;
222 if (sif->last_rx_pkt)
223 _vec_len (sif->last_rx_pkt) = 0;
229 * setup neighbor hash table
231 static clib_error_t *
232 lacp_init (vlib_main_t * vm)
238 VLIB_INIT_FUNCTION (lacp_init) =
240 .runs_after = VLIB_INITS("lacp_periodic_init"),
245 * packet trace format function, very similar to
246 * lacp_packet_scan except that we call the per TLV format
247 * functions instead of the per TLV processing functions
250 lacp_input_format_trace (u8 * s, va_list * args)
252 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
253 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
254 lacp_input_trace_t *t = va_arg (*args, lacp_input_trace_t *);
255 lacp_pdu_t *lacpdu = &t->pkt.lacpdu;
256 marker_pdu_t *marker = &t->pkt.marker;
259 lacp_state_struct *state_entry;
261 s = format (s, "%U:\n", format_vnet_sw_if_index_name, vnet_get_main (),
263 s = format (s, "Length: %d\n", t->len);
264 if (t->len >= sizeof (lacp_pdu_t))
266 switch (lacpdu->subtype)
269 if (marker->version_number == MARKER_PROTOCOL_VERSION)
270 s = format (s, " Markerv1\n");
272 s = format (s, " Subtype %u, Version %u\n", marker->subtype,
273 marker->version_number);
274 s = format (s, " Marker Information TLV: type %u\n",
275 marker->marker_info.tlv_type);
276 s = format (s, " Marker Information TLV: length %u\n",
277 marker->marker_info.tlv_length);
278 s = format (s, " Requester port: %u\n",
279 marker->marker_info.requester_port);
280 s = format (s, " Requester system: %U\n", format_ethernet_address,
281 marker->marker_info.requester_system);
282 s = format (s, " Requester transaction ID: %u\n",
283 marker->marker_info.requester_transaction_id);
287 if (lacpdu->version_number == LACP_ACTOR_LACP_VERSION)
288 s = format (s, " LACPv1\n");
290 s = format (s, " Subtype %u, Version %u\n", lacpdu->subtype,
291 lacpdu->version_number);
292 s = format (s, " Actor Information TLV: length %u\n",
293 lacpdu->actor.tlv_length);
294 s = format (s, " System %U\n", format_ethernet_address,
295 lacpdu->actor.port_info.system);
296 s = format (s, " System priority %u\n",
297 ntohs (lacpdu->actor.port_info.system_priority));
298 s = format (s, " Key %u\n", ntohs (lacpdu->actor.port_info.key));
299 s = format (s, " Port priority %u\n",
300 ntohs (lacpdu->actor.port_info.port_priority));
301 s = format (s, " Port number %u\n",
302 ntohs (lacpdu->actor.port_info.port_number));
303 s = format (s, " State 0x%x\n", lacpdu->actor.port_info.state);
304 state_entry = (lacp_state_struct *) & lacp_state_array;
305 while (state_entry->str)
307 if (lacpdu->actor.port_info.state & (1 << state_entry->bit))
308 s = format (s, " %s (%d)\n", state_entry->str,
313 s = format (s, " Partner Information TLV: length %u\n",
314 lacpdu->partner.tlv_length);
315 s = format (s, " System %U\n", format_ethernet_address,
316 lacpdu->partner.port_info.system);
317 s = format (s, " System priority %u\n",
318 ntohs (lacpdu->partner.port_info.system_priority));
320 format (s, " Key %u\n", ntohs (lacpdu->partner.port_info.key));
322 format (s, " Port priority %u\n",
323 ntohs (lacpdu->partner.port_info.port_priority));
325 format (s, " Port number %u\n",
326 ntohs (lacpdu->partner.port_info.port_number));
327 s = format (s, " State 0x%x\n", lacpdu->partner.port_info.state);
328 state_entry = (lacp_state_struct *) & lacp_state_array;
329 while (state_entry->str)
331 if (lacpdu->partner.port_info.state & (1 << state_entry->bit))
332 s = format (s, " %s (%d)\n", state_entry->str,
343 if (t->len > sizeof (lacp_pdu_t))
344 len = sizeof (lacp_pdu_t);
348 for (i = 0; i < len; i++)
353 s = format (s, "\n");
354 s = format (s, " 0x%04x: ", i);
358 s = format (s, "%02x", p[i]);
365 * fd.io coding-style-patch-verification: ON
368 * eval: (c-set-style "gnu")