src/plugins/ioam/analyse/ioam_summary_export.c

   1 /*
   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:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   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.
  14  */
  15
  16 #include <vlib/vlib.h>
  17 #include <vnet/ip/ip6_packet.h>
  18 #include <ioam/analyse/ioam_summary_export.h>
  19 #include <ioam/analyse/ip6/ip6_ioam_analyse.h>
  20
  21 u8 *
  22 ioam_template_rewrite (flow_report_main_t * frm, flow_report_t * fr,
  23                        ip4_address_t * collector_address,
  24                        ip4_address_t * src_address, u16 collector_port,
  25                        ipfix_report_element_t * elts,
  26                        u32 n_elts, u32 * stream_index)
  27 {
  28   ip4_header_t *ip;
  29   udp_header_t *udp;
  30   ipfix_message_header_t *h;
  31   ipfix_set_header_t *s;
  32   ipfix_template_header_t *t;
  33   ipfix_field_specifier_t *f;
  34   ipfix_field_specifier_t *first_field;
  35   u8 *rewrite = 0;
  36   ip4_ipfix_template_packet_t *tp;
  37   u32 field_count = 0;
  38   u32 field_index = 0;
  39   flow_report_stream_t *stream;
  40
  41   stream = &frm->streams[fr->stream_index];
  42
  43   /* Determine field count */
  44 #define _(field,mask,item,length)                                   \
  45     {                                                               \
  46   field_count++;                                                    \
  47   fr->fields_to_send = clib_bitmap_set (fr->fields_to_send,         \
  48                                         field_index, 1);            \
  49     }                                                               \
  50     field_index++;
  51
  52   foreach_ioam_ipfix_field;
  53 #undef _
  54
  55   /* Add Src address, dest address, src port, dest port
  56    * path map,  number of paths manually */
  57   field_count += 6;
  58
  59   /* allocate rewrite space */
  60   vec_validate_aligned (rewrite,
  61                         sizeof (ip4_ipfix_template_packet_t)
  62                         + field_count * sizeof (ipfix_field_specifier_t) - 1,
  63                         CLIB_CACHE_LINE_BYTES);
  64
  65   tp = (ip4_ipfix_template_packet_t *) rewrite;
  66   ip = (ip4_header_t *) & tp->ip4;
  67   udp = (udp_header_t *) (ip + 1);
  68   h = (ipfix_message_header_t *) (udp + 1);
  69   s = (ipfix_set_header_t *) (h + 1);
  70   t = (ipfix_template_header_t *) (s + 1);
  71   first_field = f = (ipfix_field_specifier_t *) (t + 1);
  72
  73   ip->ip_version_and_header_length = 0x45;
  74   ip->ttl = 254;
  75   ip->protocol = IP_PROTOCOL_UDP;
  76   ip->src_address.as_u32 = src_address->as_u32;
  77   ip->dst_address.as_u32 = collector_address->as_u32;
  78   udp->src_port = clib_host_to_net_u16 (collector_port);
  79   udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
  80   udp->length = clib_host_to_net_u16 (vec_len (rewrite) - sizeof (*ip));
  81
  82   h->domain_id = clib_host_to_net_u32 (stream->domain_id);      //fr->domain_id);
  83
  84   /* Add Src address, dest address, src port, dest port
  85    * path map,  number of paths manually */
  86   f->e_id_length = ipfix_e_id_length (0 /* enterprise */ ,
  87                                       sourceIPv6Address,
  88                                       sizeof (ip6_address_t));
  89   f++;
  90
  91   f->e_id_length = ipfix_e_id_length (0 /* enterprise */ ,
  92                                       destinationIPv6Address,
  93                                       sizeof (ip6_address_t));
  94   f++;
  95
  96   f->e_id_length = ipfix_e_id_length (0 /* enterprise */ ,
  97                                       sourceTransportPort, 2);
  98   f++;
  99
 100   f->e_id_length = ipfix_e_id_length (0 /* enterprise */ ,
 101                                       destinationTransportPort, 2);
 102   f++;
 103
 104 #define _(field,mask,item,length)                               \
 105     {                                                           \
 106   f->e_id_length = ipfix_e_id_length (0 /* enterprise */,       \
 107     item, length);                                              \
 108     f++;                                                        \
 109     }
 110   foreach_ioam_ipfix_field;
 111 #undef _
 112
 113   f->e_id_length = ipfix_e_id_length (0 /* enterprise */ ,
 114                                       ioamNumberOfPaths, 2);
 115   f++;
 116
 117   /* Add ioamPathMap manually */
 118   f->e_id_length = ipfix_e_id_length (0 /* enterprise */ ,
 119                                       ioamPathMap,
 120                                       (sizeof (ioam_path) +
 121                                        (sizeof (ioam_path_map_t) *
 122                                         IOAM_TRACE_MAX_NODES)));
 123   f++;
 124
 125   /* Back to the template packet... */
 126   ip = (ip4_header_t *) & tp->ip4;
 127   udp = (udp_header_t *) (ip + 1);
 128
 129   ASSERT (f - first_field);
 130   /* Field count in this template */
 131   t->id_count = ipfix_id_count (IOAM_FLOW_TEMPLATE_ID, f - first_field);
 132
 133   /* set length in octets */
 134   s->set_id_length =
 135     ipfix_set_id_length (2 /* set_id */ , (u8 *) f - (u8 *) s);
 136
 137   /* message length in octets */
 138   h->version_length = version_length ((u8 *) f - (u8 *) h);
 139
 140   ip->length = clib_host_to_net_u16 ((u8 *) f - (u8 *) ip);
 141   ip->checksum = ip4_header_checksum (ip);
 142
 143   return rewrite;
 144 }
 145
 146 u16
 147 ioam_analyse_add_ipfix_record (flow_report_t * fr,
 148                                ioam_analyser_data_t * record,
 149                                vlib_buffer_t * b0, u16 offset,
 150                                ip6_address_t * src, ip6_address_t * dst,
 151                                u16 src_port, u16 dst_port)
 152 {
 153   while (clib_atomic_test_and_set (record->writer_lock))
 154     ;
 155
 156   int field_index = 0;
 157   u16 tmp;
 158   int i, j;
 159   u16 num_paths = 0;
 160   u16 num_paths_offset;
 161
 162
 163   /* Add IPv6 source address manually */
 164   memcpy (b0->data + offset, &src->as_u64[0], sizeof (u64));
 165   offset += sizeof (u64);
 166   memcpy (b0->data + offset, &src->as_u64[1], sizeof (u64));
 167   offset += sizeof (u64);
 168
 169   /* Add IPv6 destination address manually */
 170   memcpy (b0->data + offset, &dst->as_u64[0], sizeof (u64));
 171   offset += sizeof (u64);
 172   memcpy (b0->data + offset, &dst->as_u64[1], sizeof (u64));
 173   offset += sizeof (u64);
 174
 175   /* Add source port manually */
 176   tmp = clib_host_to_net_u16 (src_port);
 177   memcpy (b0->data + offset, &tmp, sizeof (u16));
 178   offset += sizeof (u16);
 179
 180   /* Add dest port manually */
 181   tmp = clib_host_to_net_u16 (dst_port);
 182   memcpy (b0->data + offset, &tmp, sizeof (u16));
 183   offset += sizeof (u16);
 184
 185 #define _(field,mask,item,length)                            \
 186     if (clib_bitmap_get (fr->fields_to_send, field_index))   \
 187     {                                                        \
 188       /* Expect only 4 bytes */               \
 189       u32 tmp;                                             \
 190       tmp = clib_host_to_net_u32((u32)record->field - (u32)record->chached_data_list->field);\
 191       memcpy (b0->data + offset, &tmp, length);       \
 192       offset += length;                                 \
 193     }
 194   field_index++;
 195   foreach_ioam_ipfix_field;
 196 #undef _
 197
 198   /* Store num_paths_offset here and update later */
 199   num_paths_offset = offset;
 200   offset += sizeof (u16);
 201
 202   /* Add ioamPathMap manually */
 203   for (i = 0; i < IOAM_MAX_PATHS_PER_FLOW; i++)
 204     {
 205       ioam_analyse_trace_record *trace = record->trace_data.path_data + i;
 206       ioam_analyse_trace_record *trace_cached =
 207         record->chached_data_list->trace_data.path_data + i;
 208       ioam_path *path = (ioam_path *) (b0->data + offset);
 209
 210       if (!trace->is_free)
 211         {
 212           num_paths++;
 213
 214           path->num_nodes = trace->num_nodes;
 215
 216           path->trace_type = trace->trace_type;
 217           if (0 < (trace->pkt_counter - trace_cached->pkt_counter))
 218             {
 219               u64 new_sum = trace->mean_delay * record->seqno_data.rx_packets;
 220               u64 old_sum =
 221                 trace_cached->mean_delay *
 222                 record->chached_data_list->seqno_data.rx_packets;
 223               path->mean_delay =
 224                 (u32) ((new_sum - old_sum) / (trace->pkt_counter -
 225                                               trace_cached->pkt_counter));
 226               path->mean_delay = clib_host_to_net_u32 (path->mean_delay);
 227             }
 228           else
 229             path->mean_delay = 0;
 230
 231           path->bytes_counter =
 232             trace->bytes_counter - trace_cached->bytes_counter;
 233           path->bytes_counter = clib_host_to_net_u32 (path->bytes_counter);
 234
 235           path->pkt_counter = trace->pkt_counter - trace_cached->pkt_counter;
 236           path->pkt_counter = clib_host_to_net_u32 (path->pkt_counter);
 237           offset += sizeof (ioam_path);
 238
 239           for (j = 0; j < trace->num_nodes; j++)
 240             {
 241               path->path[j].node_id =
 242                 clib_host_to_net_u32 (trace->path[j].node_id);
 243               path->path[j].ingress_if =
 244                 clib_host_to_net_u16 (trace->path[j].ingress_if);
 245               path->path[j].egress_if =
 246                 clib_host_to_net_u16 (trace->path[j].egress_if);
 247               path->path[j].state_up = trace->path[j].state_up;
 248             }
 249
 250           //offset += (sizeof(ioam_path_map_t) * trace->num_nodes);
 251           offset += (sizeof (ioam_path_map_t) * IOAM_TRACE_MAX_NODES);  //FIXME
 252         }
 253     }
 254
 255   num_paths = clib_host_to_net_u16 (num_paths);
 256   memcpy (b0->data + num_paths_offset, &num_paths, sizeof (u16));
 257
 258   /* Update cache */
 259   *(record->chached_data_list) = *record;
 260   record->chached_data_list->chached_data_list = NULL;
 261
 262   clib_atomic_release (record->writer_lock);
 263   return offset;
 264 }
 265
 266 vlib_frame_t *
 267 ioam_send_flows (flow_report_main_t * frm, flow_report_t * fr,
 268                  vlib_frame_t * f, u32 * to_next, u32 node_index)
 269 {
 270   vlib_buffer_t *b0 = NULL;
 271   u32 next_offset = 0;
 272   u32 bi0 = ~0;
 273   int i;
 274   ip4_ipfix_template_packet_t *tp;
 275   ipfix_message_header_t *h;
 276   ipfix_set_header_t *s = NULL;
 277   ip4_header_t *ip;
 278   udp_header_t *udp;
 279   u32 records_this_buffer;
 280   u16 new_l0, old_l0;
 281   ip_csum_t sum0;
 282   vlib_main_t *vm = frm->vlib_main;
 283   ip6_address_t temp;
 284   ioam_analyser_data_t *record = NULL;
 285   flow_report_stream_t *stream;
 286   ioam_analyser_data_t *aggregated_data;
 287   u16 data_len;
 288
 289   stream = &frm->streams[fr->stream_index];
 290
 291   clib_memset (&temp, 0, sizeof (ip6_address_t));
 292
 293   aggregated_data = ioam_analyser_main.aggregated_data;
 294   data_len = vec_len (aggregated_data);
 295
 296   vec_foreach_index (i, aggregated_data)
 297   {
 298     u8 flush = 0;
 299     record = aggregated_data + i;
 300
 301     /* Flush if last entry */
 302     if (i == (data_len - 1))
 303       flush = 1;
 304
 305     if (!record->is_free)
 306       {
 307
 308         if (PREDICT_FALSE (b0 == NULL))
 309           {
 310             if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
 311               break;
 312
 313             b0 = vlib_get_buffer (vm, bi0);
 314             memcpy (b0->data, fr->rewrite, vec_len (fr->rewrite));
 315             b0->current_data = 0;
 316             b0->current_length = vec_len (fr->rewrite);
 317             b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 318             vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
 319             vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
 320
 321             tp = vlib_buffer_get_current (b0);
 322             ip = &tp->ip4;
 323             h = &tp->ipfix.h;
 324             s = &tp->ipfix.s;
 325
 326             /* FIXUP: message header export_time */
 327             h->export_time = clib_host_to_net_u32 (((u32) time (NULL)));
 328
 329             /* FIXUP: message header sequence_number */
 330             h->sequence_number = stream->sequence_number++;
 331             h->sequence_number = clib_host_to_net_u32 (h->sequence_number);
 332             next_offset = (u32) (((u8 *) (s + 1)) - (u8 *) tp);
 333             records_this_buffer = 0;
 334           }
 335
 336         next_offset = ioam_analyse_add_ipfix_record (fr, record,
 337                                                      b0, next_offset,
 338                                                      &temp, &temp, 0, 0);
 339         records_this_buffer++;
 340
 341         /* Flush data if packet len is about to reach path mtu */
 342         if (next_offset > (frm->path_mtu - 250))
 343           flush = 1;
 344       }
 345
 346     if (PREDICT_FALSE (flush && b0))
 347       {
 348         s->set_id_length = ipfix_set_id_length (IOAM_FLOW_TEMPLATE_ID,
 349                                                 next_offset - (sizeof (*ip) +
 350                                                                sizeof (*udp) +
 351                                                                sizeof (*h)));
 352         b0->current_length = next_offset;
 353         b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 354         tp = vlib_buffer_get_current (b0);
 355         ip = (ip4_header_t *) & tp->ip4;
 356         udp = (udp_header_t *) (ip + 1);
 357
 358         sum0 = ip->checksum;
 359         old_l0 = ip->length;
 360         new_l0 = clib_host_to_net_u16 ((u16) next_offset);
 361         sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
 362                                length /* changed member */ );
 363
 364         ip->checksum = ip_csum_fold (sum0);
 365         ip->length = new_l0;
 366         udp->length =
 367           clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
 368
 369         if (frm->udp_checksum)
 370           {
 371             /* RFC 7011 section 10.3.2. */
 372             udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
 373             if (udp->checksum == 0)
 374               udp->checksum = 0xffff;
 375           }
 376
 377         to_next[0] = bi0;
 378         f->n_vectors++;
 379         to_next++;
 380
 381         if (f->n_vectors == VLIB_FRAME_SIZE)
 382           {
 383             vlib_put_frame_to_node (vm, node_index, f);
 384             f = vlib_get_frame_to_node (vm, node_index);
 385             f->n_vectors = 0;
 386             to_next = vlib_frame_vector_args (f);
 387           }
 388         b0 = 0;
 389         bi0 = ~0;
 390       }
 391   }
 392
 393   return f;
 394 }
 395
 396 clib_error_t *
 397 ioam_flow_create (u8 del)
 398 {
 399   vnet_flow_report_add_del_args_t args;
 400   int rv;
 401   u32 domain_id = 0;
 402   flow_report_main_t *frm = &flow_report_main;
 403   u16 template_id;
 404
 405   clib_memset (&args, 0, sizeof (args));
 406   args.rewrite_callback = ioam_template_rewrite;
 407   args.flow_data_callback = ioam_send_flows;
 408   del ? (args.is_add = 0) : (args.is_add = 1);
 409   args.domain_id = domain_id;
 410
 411   rv = vnet_flow_report_add_del (frm, &args, &template_id);
 412
 413   switch (rv)
 414     {
 415     case 0:
 416       break;
 417     case VNET_API_ERROR_NO_SUCH_ENTRY:
 418       return clib_error_return (0, "registration not found...");
 419     default:
 420       return clib_error_return (0, "vnet_flow_report_add_del returned %d",
 421                                 rv);
 422     }
 423
 424   return 0;
 425 }
 426
 427 clib_error_t *
 428 ioam_flow_report_init (vlib_main_t * vm)
 429 {
 430   clib_error_t *error;
 431
 432   if ((error = vlib_call_init_function (vm, flow_report_init)))
 433     return error;
 434
 435   return 0;
 436 }
 437
 438 VLIB_INIT_FUNCTION (ioam_flow_report_init);
 439
 440 /*
 441  * fd.io coding-style-patch-verification: ON
 442  *
 443  * Local Variables:
 444  * eval: (c-set-style "gnu")
 445  * End:
 446  */