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/ipfix-export/flow_report.h>
  17 #include <ioam/analyse/ioam_summary_export.h>
  18 #include <vnet/api_errno.h>
  19 #include <vnet/ip/ip4.h>
  20 #include <vnet/udp/udp_local.h>
  21 #include <ioam/udp-ping/udp_ping.h>
  22
  23 #define UDP_PING_EXPORT_RECORD_SIZE 400
  24
  25 static u8 *
  26 udp_ping_template_rewrite (flow_report_main_t * frm, flow_report_t * fr,
  27                            ip4_address_t * collector_address,
  28                            ip4_address_t * src_address, u16 collector_port,
  29                            ipfix_report_element_t * elts,
  30                            u32 n_elts, u32 * stream_index)
  31 {
  32   return ioam_template_rewrite (frm, fr, collector_address,
  33                                 src_address, collector_port, elts, n_elts,
  34                                 stream_index);
  35 }
  36
  37 static vlib_frame_t *
  38 udp_ping_send_flows (flow_report_main_t * frm, flow_report_t * fr,
  39                      vlib_frame_t * f, u32 * to_next, u32 node_index)
  40 {
  41   vlib_buffer_t *b0 = NULL;
  42   u32 next_offset = 0;
  43   u32 bi0 = ~0;
  44   int i, j;
  45   ip4_ipfix_template_packet_t *tp;
  46   ipfix_message_header_t *h;
  47   ipfix_set_header_t *s = NULL;
  48   ip4_header_t *ip;
  49   udp_header_t *udp;
  50   u32 records_this_buffer;
  51   u16 new_l0, old_l0;
  52   ip_csum_t sum0;
  53   vlib_main_t *vm = frm->vlib_main;
  54   flow_report_stream_t *stream;
  55   udp_ping_flow_data *stats;
  56   ip46_udp_ping_flow *ip46_flow;
  57   u16 src_port, dst_port;
  58   u16 data_len;
  59
  60   stream = &frm->streams[fr->stream_index];
  61   data_len = vec_len (udp_ping_main.ip46_flow);
  62
  63   for (i = 0; i < data_len; i++)
  64     {
  65       if (pool_is_free_index (udp_ping_main.ip46_flow, i))
  66         continue;
  67
  68       ip46_flow = pool_elt_at_index (udp_ping_main.ip46_flow, i);
  69       j = 0;
  70       for (src_port = ip46_flow->udp_data.start_src_port;
  71            src_port <= ip46_flow->udp_data.end_src_port; src_port++)
  72         {
  73           for (dst_port = ip46_flow->udp_data.start_dst_port;
  74                dst_port <= ip46_flow->udp_data.end_dst_port; dst_port++, j++)
  75             {
  76               stats = ip46_flow->udp_data.stats + j;
  77               if (PREDICT_FALSE (b0 == NULL))
  78                 {
  79                   if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
  80                     break;
  81
  82
  83                   b0 = vlib_get_buffer (vm, bi0);
  84                   memcpy (b0->data, fr->rewrite, vec_len (fr->rewrite));
  85                   b0->current_data = 0;
  86                   b0->current_length = vec_len (fr->rewrite);
  87                   b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
  88                   vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
  89                   vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
  90
  91                   tp = vlib_buffer_get_current (b0);
  92                   ip = &tp->ip4;
  93                   h = &tp->ipfix.h;
  94                   s = &tp->ipfix.s;
  95
  96                   /* FIXUP: message header export_time */
  97                   h->export_time = clib_host_to_net_u32 (((u32) time (NULL)));
  98
  99                   /* FIXUP: message header sequence_number */
 100                   h->sequence_number = stream->sequence_number++;
 101                   h->sequence_number =
 102                     clib_host_to_net_u32 (h->sequence_number);
 103                   next_offset = (u32) (((u8 *) (s + 1)) - (u8 *) tp);
 104                   records_this_buffer = 0;
 105                 }
 106
 107               next_offset = ioam_analyse_add_ipfix_record (fr,
 108                                                            &stats->analyse_data,
 109                                                            b0, next_offset,
 110                                                            &ip46_flow->
 111                                                            src.ip6,
 112                                                            &ip46_flow->
 113                                                            dst.ip6, src_port,
 114                                                            dst_port);
 115
 116               //u32 pak_sent = clib_host_to_net_u32(stats->pak_sent);
 117               //memcpy (b0->data + next_offset, &pak_sent, sizeof(u32));
 118               //next_offset += sizeof(u32);
 119
 120               records_this_buffer++;
 121
 122               /* Flush data if packet len is about to reach path mtu */
 123               if (next_offset > (frm->path_mtu - UDP_PING_EXPORT_RECORD_SIZE))
 124                 {
 125                   b0->current_length = next_offset;
 126                   b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 127                   tp = vlib_buffer_get_current (b0);
 128                   ip = (ip4_header_t *) & tp->ip4;
 129                   udp = (udp_header_t *) (ip + 1);
 130                   h = &tp->ipfix.h;
 131                   s = &tp->ipfix.s;
 132
 133                   s->set_id_length =
 134                     ipfix_set_id_length (IOAM_FLOW_TEMPLATE_ID,
 135                                          next_offset - (sizeof (*ip) +
 136                                                         sizeof (*udp) +
 137                                                         sizeof (*h)));
 138                   h->version_length =
 139                     version_length (next_offset -
 140                                     (sizeof (*ip) + sizeof (*udp)));
 141
 142                   sum0 = ip->checksum;
 143                   old_l0 = ip->length;
 144                   new_l0 = clib_host_to_net_u16 ((u16) next_offset);
 145                   sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
 146                                          length /* changed member */ );
 147
 148                   ip->checksum = ip_csum_fold (sum0);
 149                   ip->length = new_l0;
 150                   udp->length =
 151                     clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
 152
 153                   udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
 154                   if (udp->checksum == 0)
 155                     udp->checksum = 0xffff;
 156
 157                   ASSERT (ip4_header_checksum_is_valid (ip));
 158
 159                   to_next[0] = bi0;
 160                   f->n_vectors++;
 161                   to_next++;
 162
 163                   if (f->n_vectors == VLIB_FRAME_SIZE)
 164                     {
 165                       vlib_put_frame_to_node (vm, node_index, f);
 166                       f = vlib_get_frame_to_node (vm, node_index);
 167                       f->n_vectors = 0;
 168                       to_next = vlib_frame_vector_args (f);
 169                     }
 170                   b0 = 0;
 171                   bi0 = ~0;
 172                 }
 173             }
 174         }
 175     }
 176
 177   if (b0)
 178     {
 179       b0->current_length = next_offset;
 180       b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 181       tp = vlib_buffer_get_current (b0);
 182       ip = (ip4_header_t *) & tp->ip4;
 183       udp = (udp_header_t *) (ip + 1);
 184       h = &tp->ipfix.h;
 185       s = &tp->ipfix.s;
 186
 187       s->set_id_length = ipfix_set_id_length (IOAM_FLOW_TEMPLATE_ID,
 188                                               next_offset - (sizeof (*ip) +
 189                                                              sizeof (*udp) +
 190                                                              sizeof (*h)));
 191       h->version_length =
 192         version_length (next_offset - (sizeof (*ip) + sizeof (*udp)));
 193
 194       sum0 = ip->checksum;
 195       old_l0 = ip->length;
 196       new_l0 = clib_host_to_net_u16 ((u16) next_offset);
 197       sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
 198                              length /* changed member */ );
 199
 200       ip->checksum = ip_csum_fold (sum0);
 201       ip->length = new_l0;
 202       udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
 203
 204       udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
 205       if (udp->checksum == 0)
 206         udp->checksum = 0xffff;
 207
 208       ASSERT (ip4_header_checksum_is_valid (ip));
 209
 210       to_next[0] = bi0;
 211       f->n_vectors++;
 212       to_next++;
 213
 214       if (f->n_vectors == VLIB_FRAME_SIZE)
 215         {
 216           vlib_put_frame_to_node (vm, node_index, f);
 217           f = vlib_get_frame_to_node (vm, node_index);
 218           f->n_vectors = 0;
 219           to_next = vlib_frame_vector_args (f);
 220         }
 221       b0 = 0;
 222       bi0 = ~0;
 223     }
 224   return f;
 225 }
 226
 227 clib_error_t *
 228 udp_ping_flow_create (u8 del)
 229 {
 230   vnet_flow_report_add_del_args_t args;
 231   int rv;
 232   u32 domain_id = 0;
 233   flow_report_main_t *frm = &flow_report_main;
 234   u16 template_id;
 235
 236   clib_memset (&args, 0, sizeof (args));
 237   args.rewrite_callback = udp_ping_template_rewrite;
 238   args.flow_data_callback = udp_ping_send_flows;
 239   del ? (args.is_add = 0) : (args.is_add = 1);
 240   args.domain_id = domain_id;
 241   args.src_port = UDP_DST_PORT_ipfix;
 242
 243   rv = vnet_flow_report_add_del (frm, &args, &template_id);
 244
 245   switch (rv)
 246     {
 247     case 0:
 248       break;
 249     case VNET_API_ERROR_NO_SUCH_ENTRY:
 250       return clib_error_return (0, "registration not found...");
 251     default:
 252       return clib_error_return (0, "vnet_flow_report_add_del returned %d",
 253                                 rv);
 254     }
 255
 256   return 0;
 257 }
 258
 259 static clib_error_t *
 260 set_udp_ping_export_command_fn (vlib_main_t * vm, unformat_input_t * input,
 261                                 vlib_cli_command_t * cmd)
 262 {
 263   //int rv;
 264   int is_add = 1;
 265
 266   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 267     {
 268       if (unformat (input, "export-ipfix"))
 269         is_add = 1;
 270       else if (unformat (input, "disable"))
 271         is_add = 0;
 272       else
 273         break;
 274     }
 275
 276   if (is_add)
 277     (void) udp_ping_flow_create (0);
 278   else
 279     (void) udp_ping_flow_create (1);
 280
 281   return 0;
 282 }
 283
 284 /* *INDENT-OFF* */
 285 VLIB_CLI_COMMAND (set_udp_ping_export_command, static) = {
 286     .path = "set udp-ping export-ipfix",
 287     .short_help = "set udp-ping export-ipfix [disable]",
 288     .function = set_udp_ping_export_command_fn,
 289 };
 290 /* *INDENT-ON* */
 291
 292 clib_error_t *
 293 udp_ping_flow_report_init (vlib_main_t * vm)
 294 {
 295   return 0;
 296 }
 297
 298 /* *INDENT-OFF* */
 299 VLIB_INIT_FUNCTION (udp_ping_flow_report_init) =
 300 {
 301   .runs_after = VLIB_INITS ("flow_report_init"),
 302 };
 303 /* *INDENT-ON* */
 304
 305
 306 /*
 307  * fd.io coding-style-patch-verification: ON
 308  *
 309  * Local Variables:
 310  * eval: (c-set-style "gnu")
 311  * End:
 312  */