src/plugins/ioam/udp-ping/udp_ping_export.c

   1 /*
   2  * Copyright (c) 2016 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 <vnet/flow/flow_report.h>
  17 #include <ioam/analyse/ioam_summary_export.h>
  18 #include <vnet/api_errno.h>
  19 #include <ioam/udp-ping/udp_ping.h>
  20
  21 #define UDP_PING_EXPORT_RECORD_SIZE 400
  22
  23 static u8 *
  24 udp_ping_template_rewrite (flow_report_main_t * frm, flow_report_t * fr,
  25                            ip4_address_t * collector_address,
  26                            ip4_address_t * src_address, u16 collector_port)
  27 {
  28   return ioam_template_rewrite (frm, fr, collector_address,
  29                                 src_address, collector_port);
  30 }
  31
  32 static vlib_frame_t *
  33 udp_ping_send_flows (flow_report_main_t * frm, flow_report_t * fr,
  34                      vlib_frame_t * f, u32 * to_next, u32 node_index)
  35 {
  36   vlib_buffer_t *b0 = NULL;
  37   u32 next_offset = 0;
  38   u32 bi0 = ~0;
  39   int i, j;
  40   ip4_ipfix_template_packet_t *tp;
  41   ipfix_message_header_t *h;
  42   ipfix_set_header_t *s = NULL;
  43   ip4_header_t *ip;
  44   udp_header_t *udp;
  45   u32 records_this_buffer;
  46   u16 new_l0, old_l0;
  47   ip_csum_t sum0;
  48   vlib_main_t *vm = frm->vlib_main;
  49   flow_report_stream_t *stream;
  50   udp_ping_flow_data *stats;
  51   ip46_udp_ping_flow *ip46_flow;
  52   u16 src_port, dst_port;
  53   u16 data_len;
  54
  55   stream = &frm->streams[fr->stream_index];
  56   data_len = vec_len (udp_ping_main.ip46_flow);
  57
  58   for (i = 0; i < data_len; i++)
  59     {
  60       if (pool_is_free_index (udp_ping_main.ip46_flow, i))
  61         continue;
  62
  63       ip46_flow = pool_elt_at_index (udp_ping_main.ip46_flow, i);
  64       j = 0;
  65       for (src_port = ip46_flow->udp_data.start_src_port;
  66            src_port <= ip46_flow->udp_data.end_src_port; src_port++)
  67         {
  68           for (dst_port = ip46_flow->udp_data.start_dst_port;
  69                dst_port <= ip46_flow->udp_data.end_dst_port; dst_port++, j++)
  70             {
  71               stats = ip46_flow->udp_data.stats + j;
  72               if (PREDICT_FALSE (b0 == NULL))
  73                 {
  74                   if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
  75                     break;
  76
  77
  78                   b0 = vlib_get_buffer (vm, bi0);
  79                   memcpy (b0->data, fr->rewrite, vec_len (fr->rewrite));
  80                   b0->current_data = 0;
  81                   b0->current_length = vec_len (fr->rewrite);
  82                   b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
  83                   vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
  84                   vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
  85
  86                   tp = vlib_buffer_get_current (b0);
  87                   ip = &tp->ip4;
  88                   udp = &tp->udp;
  89                   h = &tp->ipfix.h;
  90                   s = &tp->ipfix.s;
  91
  92                   /* FIXUP: message header export_time */
  93                   h->export_time = clib_host_to_net_u32 (((u32) time (NULL)));
  94
  95                   /* FIXUP: message header sequence_number */
  96                   h->sequence_number = stream->sequence_number++;
  97                   h->sequence_number =
  98                     clib_host_to_net_u32 (h->sequence_number);
  99                   next_offset = (u32) (((u8 *) (s + 1)) - (u8 *) tp);
 100                   records_this_buffer = 0;
 101                 }
 102
 103               next_offset = ioam_analyse_add_ipfix_record (fr,
 104                                                            &stats->analyse_data,
 105                                                            b0, next_offset,
 106                                                            &ip46_flow->
 107                                                            src.ip6,
 108                                                            &ip46_flow->
 109                                                            dst.ip6, src_port,
 110                                                            dst_port);
 111
 112               //u32 pak_sent = clib_host_to_net_u32(stats->pak_sent);
 113               //memcpy (b0->data + next_offset, &pak_sent, sizeof(u32));
 114               //next_offset += sizeof(u32);
 115
 116               records_this_buffer++;
 117
 118               /* Flush data if packet len is about to reach path mtu */
 119               if (next_offset > (frm->path_mtu - UDP_PING_EXPORT_RECORD_SIZE))
 120                 {
 121                   b0->current_length = next_offset;
 122                   b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 123                   tp = vlib_buffer_get_current (b0);
 124                   ip = (ip4_header_t *) & tp->ip4;
 125                   udp = (udp_header_t *) (ip + 1);
 126                   h = &tp->ipfix.h;
 127                   s = &tp->ipfix.s;
 128
 129                   s->set_id_length =
 130                     ipfix_set_id_length (IOAM_FLOW_TEMPLATE_ID,
 131                                          next_offset - (sizeof (*ip) +
 132                                                         sizeof (*udp) +
 133                                                         sizeof (*h)));
 134                   h->version_length =
 135                     version_length (next_offset -
 136                                     (sizeof (*ip) + sizeof (*udp)));
 137
 138                   sum0 = ip->checksum;
 139                   old_l0 = ip->length;
 140                   new_l0 = clib_host_to_net_u16 ((u16) next_offset);
 141                   sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
 142                                          length /* changed member */ );
 143
 144                   ip->checksum = ip_csum_fold (sum0);
 145                   ip->length = new_l0;
 146                   udp->length =
 147                     clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
 148
 149                   udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
 150                   if (udp->checksum == 0)
 151                     udp->checksum = 0xffff;
 152
 153                   ASSERT (ip->checksum == ip4_header_checksum (ip));
 154
 155                   to_next[0] = bi0;
 156                   f->n_vectors++;
 157                   to_next++;
 158
 159                   if (f->n_vectors == VLIB_FRAME_SIZE)
 160                     {
 161                       vlib_put_frame_to_node (vm, node_index, f);
 162                       f = vlib_get_frame_to_node (vm, node_index);
 163                       f->n_vectors = 0;
 164                       to_next = vlib_frame_vector_args (f);
 165                     }
 166                   b0 = 0;
 167                   bi0 = ~0;
 168                 }
 169             }
 170         }
 171     }
 172
 173   if (b0)
 174     {
 175       b0->current_length = next_offset;
 176       b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 177       tp = vlib_buffer_get_current (b0);
 178       ip = (ip4_header_t *) & tp->ip4;
 179       udp = (udp_header_t *) (ip + 1);
 180       h = &tp->ipfix.h;
 181       s = &tp->ipfix.s;
 182
 183       s->set_id_length = ipfix_set_id_length (IOAM_FLOW_TEMPLATE_ID,
 184                                               next_offset - (sizeof (*ip) +
 185                                                              sizeof (*udp) +
 186                                                              sizeof (*h)));
 187       h->version_length =
 188         version_length (next_offset - (sizeof (*ip) + sizeof (*udp)));
 189
 190       sum0 = ip->checksum;
 191       old_l0 = ip->length;
 192       new_l0 = clib_host_to_net_u16 ((u16) next_offset);
 193       sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
 194                              length /* changed member */ );
 195
 196       ip->checksum = ip_csum_fold (sum0);
 197       ip->length = new_l0;
 198       udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
 199
 200       udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
 201       if (udp->checksum == 0)
 202         udp->checksum = 0xffff;
 203
 204       ASSERT (ip->checksum == ip4_header_checksum (ip));
 205
 206       to_next[0] = bi0;
 207       f->n_vectors++;
 208       to_next++;
 209
 210       if (f->n_vectors == VLIB_FRAME_SIZE)
 211         {
 212           vlib_put_frame_to_node (vm, node_index, f);
 213           f = vlib_get_frame_to_node (vm, node_index);
 214           f->n_vectors = 0;
 215           to_next = vlib_frame_vector_args (f);
 216         }
 217       b0 = 0;
 218       bi0 = ~0;
 219     }
 220   return f;
 221 }
 222
 223 clib_error_t *
 224 udp_ping_flow_create (u8 del)
 225 {
 226   vnet_flow_report_add_del_args_t args;
 227   int rv;
 228   u32 domain_id = 0;
 229   flow_report_main_t *frm = &flow_report_main;
 230
 231   args.rewrite_callback = udp_ping_template_rewrite;
 232   args.flow_data_callback = udp_ping_send_flows;
 233   del ? (args.is_add = 0) : (args.is_add = 1);
 234   args.domain_id = domain_id;
 235
 236   rv = vnet_flow_report_add_del (frm, &args);
 237
 238   switch (rv)
 239     {
 240     case 0:
 241       break;
 242     case VNET_API_ERROR_NO_SUCH_ENTRY:
 243       return clib_error_return (0, "registration not found...");
 244     default:
 245       return clib_error_return (0, "vnet_flow_report_add_del returned %d",
 246                                 rv);
 247     }
 248
 249   return 0;
 250 }
 251
 252 static clib_error_t *
 253 set_udp_ping_export_command_fn (vlib_main_t * vm, unformat_input_t * input,
 254                                 vlib_cli_command_t * cmd)
 255 {
 256   //int rv;
 257   int is_add = 1;
 258
 259   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 260     {
 261       if (unformat (input, "export-ipfix"))
 262         is_add = 1;
 263       else if (unformat (input, "disable"))
 264         is_add = 0;
 265       else
 266         break;
 267     }
 268
 269   if (is_add)
 270     (void) udp_ping_flow_create (0);
 271   else
 272     (void) udp_ping_flow_create (1);
 273
 274   return 0;
 275 }
 276
 277 /* *INDENT-OFF* */
 278 VLIB_CLI_COMMAND (set_udp_ping_export_command, static) = {
 279     .path = "set udp-ping export-ipfix",
 280     .short_help = "set udp-ping export-ipfix [disable]",
 281     .function = set_udp_ping_export_command_fn,
 282 };
 283 /* *INDENT-ON* */
 284
 285 clib_error_t *
 286 udp_ping_flow_report_init (vlib_main_t * vm)
 287 {
 288   clib_error_t *error;
 289
 290   if ((error = vlib_call_init_function (vm, flow_report_init)))
 291     return error;
 292
 293   return 0;
 294 }
 295
 296 VLIB_INIT_FUNCTION (udp_ping_flow_report_init);
 297
 298 /*
 299  * fd.io coding-style-patch-verification: ON
 300  *
 301  * Local Variables:
 302  * eval: (c-set-style "gnu")
 303  * End:
 304  */