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.
16 #include <vnet/vnet.h>
17 #include <vnet/ip/ip.h>
18 #include <vnet/ip/ip6_hop_by_hop.h>
19 #include <ioam/encap/ip6_ioam_e2e.h>
20 #include <ioam/encap/ip6_ioam_trace.h>
21 #include <ioam/udp-ping/udp_ping_packet.h>
22 #include <ioam/udp-ping/udp_ping.h>
24 #define UDP_PING_REWRITE_LEN 1000
27 udp_ping_fill_udp_data (udp_ping_t * udp_ping,
28 u16 src_port, u16 dst_port, u8 msg_type, u16 ctx)
30 /* Populate udp ping header */
31 udp_ping->udp.src_port = clib_host_to_net_u16 (src_port);
32 udp_ping->udp.dst_port = clib_host_to_net_u16 (dst_port);
33 udp_ping->udp.length = clib_host_to_net_u16 (sizeof (udp_ping_t));
34 udp_ping->udp.checksum = 0;
35 udp_ping->ping_data.probe_marker1 =
36 clib_host_to_net_u32 (UDP_PING_PROBE_MARKER1);
37 udp_ping->ping_data.probe_marker2 =
38 clib_host_to_net_u32 (UDP_PING_PROBE_MARKER2);
39 udp_ping->ping_data.version = 1;
40 udp_ping->ping_data.msg_type = msg_type;
41 udp_ping->ping_data.flags = clib_host_to_net_u16 (0);
42 udp_ping->ping_data.tel_req_vec = clib_host_to_net_u16 (0);
43 udp_ping->ping_data.hop_limit = 254;
44 udp_ping->ping_data.hop_count = 0;
45 udp_ping->ping_data.reserve = clib_host_to_net_u16 (0);
46 udp_ping->ping_data.max_len =
47 udp_ping->ping_data.cur_len = clib_host_to_net_u16 (0);
48 udp_ping->ping_data.sender_handle = clib_host_to_net_u16 (ctx);
49 udp_ping->ping_data.seq_no = clib_host_to_net_u16 (0);
51 return (sizeof (udp_ping_t));
55 * @brief Frame IPv6 udp-ping probe packet.
57 * Creates IPv6 UDP-Ping probe packet along with iOAM headers.
61 udp_ping_create_ip6_pak (u8 * buf, /*u16 len, */
62 ip6_address_t src, ip6_address_t dst,
63 u16 src_port, u16 dst_port, u8 msg_type, u16 ctx)
66 ip6_hop_by_hop_header_t *hbh0;
67 //trace_profile *profile = NULL;
68 u16 hbh_len = 0, rnd_size = 0, ip0_len = 0, udp_len = 0;
69 u16 trace_len = 0, trace_data_size = 0;
70 u16 e2e_len = sizeof (ioam_e2e_option_t) - sizeof (ip6_hop_by_hop_option_t);
72 ioam_trace_option_t *trace_option;
73 ioam_e2e_option_t *e2e;
75 ip0 = (ip6_header_t *) buf;
77 ip0->ip_version_traffic_class_and_flow_label =
78 clib_host_to_net_u32 (0x6 << 28);
80 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
83 ip0->src_address = src;
84 ip0->dst_address = dst;
86 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
88 /* Calculate hbh header len */
89 //profile = trace_profile_find();
90 trace_data_size = fetch_trace_data_size (TRACE_TYPE_IF_TS_APP);
91 /* We need 2 times data for trace as packet traverse back to source */
92 trace_len = sizeof (ioam_trace_option_t) +
93 (5 * trace_data_size * 2) - sizeof (ip6_hop_by_hop_option_t);
94 //(profile->num_elts * trace_data_size * 2);
95 hbh_len = e2e_len + trace_len + sizeof (ip6_hop_by_hop_header_t);
96 rnd_size = (hbh_len + 7) & ~7;
98 /* Length of header in 8 octet units, not incl first 8 octets */
99 hbh0->length = (rnd_size >> 3) - 1;
100 hbh0->protocol = IP_PROTOCOL_UDP;
102 /* Populate hbh header */
103 current = (u8 *) (hbh0 + 1);
106 trace_option = (ioam_trace_option_t *) current;
107 trace_option->hdr.type = HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST |
108 HBH_OPTION_TYPE_DATA_CHANGE_ENROUTE;
109 trace_option->hdr.length = trace_len;
110 trace_option->trace_hdr.ioam_trace_type =
111 TRACE_TYPE_IF_TS_APP & TRACE_TYPE_MASK;
113 trace_option->trace_hdr.data_list_elts_left = 5 * 2;
114 //profile->num_elts * 2;
116 current += trace_option->hdr.length + sizeof (ip6_hop_by_hop_option_t);
119 e2e = (ioam_e2e_option_t *) current;
120 e2e->hdr.type = HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE;
121 e2e->hdr.length = e2e_len;
123 /* Move past hbh header */
124 current = ((u8 *) hbh0) + ((hbh0->length + 1) << 3);
126 /* Populate udp ping header */
127 udp_len = udp_ping_fill_udp_data ((udp_ping_t *) current,
128 src_port, dst_port, msg_type, ctx);
130 /* Calculate total length and set it in ip6 header */
131 ip0_len = ((hbh0->length + 1) << 3) + udp_len;
132 //ip0_len = (len > ip0_len) ? len : ip0_len;
133 ip0->payload_length = clib_host_to_net_u16 (ip0_len);
135 return (ip0_len + sizeof (ip6_header_t));
139 udp_ping_compare_flow (ip46_address_t src, ip46_address_t dst,
140 u16 start_src_port, u16 end_src_port,
141 u16 start_dst_port, u16 end_dst_port,
142 ip46_udp_ping_flow * flow)
144 if ((0 == ip46_address_cmp (&flow->src, &src)) &&
145 (0 == ip46_address_cmp (&flow->dst, &dst)) &&
146 (flow->udp_data.start_src_port == start_src_port) &&
147 (flow->udp_data.end_src_port == end_src_port) &&
148 (flow->udp_data.start_dst_port == start_dst_port) &&
149 (flow->udp_data.end_dst_port == end_dst_port))
158 udp_ping_populate_flow (ip46_address_t src, ip46_address_t dst,
159 u16 start_src_port, u16 end_src_port,
160 u16 start_dst_port, u16 end_dst_port,
161 u16 interval, u8 fault_det, ip46_udp_ping_flow * flow)
165 flow->udp_data.start_src_port = start_src_port;
166 flow->udp_data.end_src_port = end_src_port;
167 flow->udp_data.start_dst_port = start_dst_port;
168 flow->udp_data.end_dst_port = end_dst_port;
169 flow->udp_data.interval = interval;
170 flow->udp_data.next_send_time = 0;
171 flow->fault_det = fault_det;
175 udp_ping_create_rewrite (ip46_udp_ping_flow * flow, u16 ctx)
181 udp_ping_flow_data *stats;
184 (flow->udp_data.end_dst_port - flow->udp_data.start_dst_port) + 1;
186 ((flow->udp_data.end_src_port - flow->udp_data.start_src_port) + 1);
188 vec_validate_aligned (flow->udp_data.stats,
189 no_flows - 1, CLIB_CACHE_LINE_BYTES);
192 for (src_port = flow->udp_data.start_src_port;
193 src_port <= flow->udp_data.end_src_port; src_port++)
195 for (dst_port = flow->udp_data.start_dst_port;
196 dst_port <= flow->udp_data.end_dst_port; dst_port++)
200 stats = flow->udp_data.stats + i;
201 ioam_analyse_init_data (&stats->analyse_data);
202 stats->analyse_data.is_free = 0;
204 vec_validate (rewrite, UDP_PING_REWRITE_LEN - 1);
205 stats->ping_rewrite = rewrite;
207 udp_ping_create_ip6_pak (rewrite,
208 flow->src.ip6, flow->dst.ip6,
209 src_port, dst_port, UDP_PING_PROBE, ctx);
210 /* For each flow we need to create ioam e2e flow */
211 stats->flow_ctx = ioam_flow_add (1, (u8 *) "udp_ping"); //FIXME
218 udp_ping_free_flow_data (ip46_udp_ping_flow * flow)
221 udp_ping_flow_data *stats;
223 for (i = 0; i < vec_len (flow->udp_data.stats); i++)
225 stats = flow->udp_data.stats + i;
226 vec_free (stats->ping_rewrite);
227 stats->ping_rewrite = NULL;
228 stats->rewrite_len = 0;
231 vec_free (flow->udp_data.stats);
232 flow->udp_data.stats = NULL;
236 * @brief Create and send ipv6 udp-ping probe packet.
240 udp_ping_send_ip6_pak (vlib_main_t * vm, ip46_udp_ping_flow * flow)
246 udp_ping_flow_data *stats;
247 vlib_frame_t *nf = 0;
249 vlib_node_t *next_node;
251 next_node = vlib_get_node_by_name (vm, (u8 *) "ip6-lookup");
252 nf = vlib_get_frame_to_node (vm, next_node->index);
254 to_next = vlib_frame_vector_args (nf);
256 no_pak = vec_len (flow->udp_data.stats);
257 vec_validate (buffers, (no_pak - 1));
258 if (vlib_buffer_alloc (vm, buffers, vec_len (buffers)) != no_pak)
264 for (i = 0; i < no_pak; i++)
267 b0 = vlib_get_buffer (vm, buffers[i]);
268 stats = flow->udp_data.stats + i;
269 clib_memcpy_fast (b0->data, stats->ping_rewrite, stats->rewrite_len);
270 b0->current_data = 0;
271 b0->current_length = stats->rewrite_len;
272 b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
274 /* If session is going down, then set path down */
275 if ((stats->retry != 0) && ((stats->retry % MAX_PING_RETRIES) == 0))
276 ip6_ioam_analyse_set_paths_down (&stats->analyse_data);
279 stats->analyse_data.pkt_sent++;
280 vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
281 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
282 vnet_buffer (b0)->l2_classify.opaque_index = stats->flow_ctx;
284 ip6_header_t *ip6 = vlib_buffer_get_current (b0);
285 ip6_hop_by_hop_header_t *hbh = (ip6_hop_by_hop_header_t *) (ip6 + 1);
287 (udp_header_t *) ((u8 *) hbh + ((hbh->length + 1) << 3));
289 /* If session is down, then set loopback flag in probe.
290 * This is for fault isolation.
292 if (flow->fault_det && (stats->retry > MAX_PING_RETRIES))
294 ioam_trace_option_t *opt = (ioam_trace_option_t *)
295 ip6_hbh_get_option (hbh, HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST);
296 ip6_hbh_ioam_trace_set_bit (opt, BIT_LOOPBACK);
299 /* Checksum not pre-computed as we intend to vary packet length for every
300 * probe. its isnt done yet, but to be taken up later.
302 udp->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6, &bogus);
304 if (udp->checksum == 0)
305 udp->checksum = 0xffff;
307 if (nf->n_vectors == VLIB_FRAME_SIZE)
309 vlib_put_frame_to_node (vm, next_node->index, nf);
310 nf = vlib_get_frame_to_node (vm, next_node->index);
312 to_next = vlib_frame_vector_args (nf);
314 *to_next = buffers[i];
318 vlib_put_frame_to_node (vm, next_node->index, nf);
320 flow->udp_data.next_send_time =
321 vlib_time_now (vm) + flow->udp_data.interval;
325 * fd.io coding-style-patch-verification: ON
328 * eval: (c-set-style "gnu")