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 <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                            ipfix_report_element_t * elts,
  28                            u32 n_elts, u32 * stream_index)
  29 {
  30   return ioam_template_rewrite (frm, fr, collector_address,
  31                                 src_address, collector_port, elts, n_elts,
  32                                 stream_index);
  33 }
  34
  35 static vlib_frame_t *
  36 udp_ping_send_flows (flow_report_main_t * frm, flow_report_t * fr,
  37                      vlib_frame_t * f, u32 * to_next, u32 node_index)
  38 {
  39   vlib_buffer_t *b0 = NULL;
  40   u32 next_offset = 0;
  41   u32 bi0 = ~0;
  42   int i, j;
  43   ip4_ipfix_template_packet_t *tp;
  44   ipfix_message_header_t *h;
  45   ipfix_set_header_t *s = NULL;
  46   ip4_header_t *ip;
  47   udp_header_t *udp;
  48   u32 records_this_buffer;
  49   u16 new_l0, old_l0;
  50   ip_csum_t sum0;
  51   vlib_main_t *vm = frm->vlib_main;
  52   flow_report_stream_t *stream;
  53   udp_ping_flow_data *stats;
  54   ip46_udp_ping_flow *ip46_flow;
  55   u16 src_port, dst_port;
  56   u16 data_len;
  57
  58   stream = &frm->streams[fr->stream_index];
  59   data_len = vec_len (udp_ping_main.ip46_flow);
  60
  61   for (i = 0; i < data_len; i++)
  62     {
  63       if (pool_is_free_index (udp_ping_main.ip46_flow, i))
  64         continue;
  65
  66       ip46_flow = pool_elt_at_index (udp_ping_main.ip46_flow, i);
  67       j = 0;
  68       for (src_port = ip46_flow->udp_data.start_src_port;
  69            src_port <= ip46_flow->udp_data.end_src_port; src_port++)
  70         {
  71           for (dst_port = ip46_flow->udp_data.start_dst_port;
  72                dst_port <= ip46_flow->udp_data.end_dst_port; dst_port++, j++)
  73             {
  74               stats = ip46_flow->udp_data.stats + j;
  75               if (PREDICT_FALSE (b0 == NULL))
  76                 {
  77                   if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
  78                     break;
  79
  80
  81                   b0 = vlib_get_buffer (vm, bi0);
  82                   memcpy (b0->data, fr->rewrite, vec_len (fr->rewrite));
  83                   b0->current_data = 0;
  84                   b0->current_length = vec_len (fr->rewrite);
  85                   b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
  86                   vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
  87                   vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
  88
  89                   tp = vlib_buffer_get_current (b0);
  90                   ip = &tp->ip4;
  91                   h = &tp->ipfix.h;
  92                   s = &tp->ipfix.s;
  93
  94                   /* FIXUP: message header export_time */
  95                   h->export_time = clib_host_to_net_u32 (((u32) time (NULL)));
  96
  97                   /* FIXUP: message header sequence_number */
  98                   h->sequence_number = stream->sequence_number++;
  99                   h->sequence_number =
 100                     clib_host_to_net_u32 (h->sequence_number);
 101                   next_offset = (u32) (((u8 *) (s + 1)) - (u8 *) tp);
 102                   records_this_buffer = 0;
 103                 }
 104
 105               next_offset = ioam_analyse_add_ipfix_record (fr,
 106                                                            &stats->analyse_data,
 107                                                            b0, next_offset,
 108                                                            &ip46_flow->
 109                                                            src.ip6,
 110                                                            &ip46_flow->
 111                                                            dst.ip6, src_port,
 112                                                            dst_port);
 113
 114               //u32 pak_sent = clib_host_to_net_u32(stats->pak_sent);
 115               //memcpy (b0->data + next_offset, &pak_sent, sizeof(u32));
 116               //next_offset += sizeof(u32);
 117
 118               records_this_buffer++;
 119
 120               /* Flush data if packet len is about to reach path mtu */
 121               if (next_offset > (frm->path_mtu - UDP_PING_EXPORT_RECORD_SIZE))
 122                 {
 123                   b0->current_length = next_offset;
 124                   b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 125                   tp = vlib_buffer_get_current (b0);
 126                   ip = (ip4_header_t *) & tp->ip4;
 127                   udp = (udp_header_t *) (ip + 1);
 128                   h = &tp->ipfix.h;
 129                   s = &tp->ipfix.s;
 130
 131                   s->set_id_length =
 132                     ipfix_set_id_length (IOAM_FLOW_TEMPLATE_ID,
 133                                          next_offset - (sizeof (*ip) +
 134                                                         sizeof (*udp) +
 135                                                         sizeof (*h)));
 136                   h->version_length =
 137                     version_length (next_offset -
 138                                     (sizeof (*ip) + sizeof (*udp)));
 139
 140                   sum0 = ip->checksum;
 141                   old_l0 = ip->length;
 142                   new_l0 = clib_host_to_net_u16 ((u16) next_offset);
 143                   sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
 144                                          length /* changed member */ );
 145
 146                   ip->checksum = ip_csum_fold (sum0);
 147                   ip->length = new_l0;
 148                   udp->length =
 149                     clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
 150
 151                   udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
 152                   if (udp->checksum == 0)
 153                     udp->checksum = 0xffff;
 154
 155                   ASSERT (ip->checksum == ip4_header_checksum (ip));
 156
 157                   to_next[0] = bi0;
 158                   f->n_vectors++;
 159                   to_next++;
 160
 161                   if (f->n_vectors == VLIB_FRAME_SIZE)
 162                     {
 163                       vlib_put_frame_to_node (vm, node_index, f);
 164                       f = vlib_get_frame_to_node (vm, node_index);
 165                       f->n_vectors = 0;
 166                       to_next = vlib_frame_vector_args (f);
 167                     }
 168                   b0 = 0;
 169                   bi0 = ~0;
 170                 }
 171             }
 172         }
 173     }
 174
 175   if (b0)
 176     {
 177       b0->current_length = next_offset;
 178       b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 179       tp = vlib_buffer_get_current (b0);
 180       ip = (ip4_header_t *) & tp->ip4;
 181       udp = (udp_header_t *) (ip + 1);
 182       h = &tp->ipfix.h;
 183       s = &tp->ipfix.s;
 184
 185       s->set_id_length = ipfix_set_id_length (IOAM_FLOW_TEMPLATE_ID,
 186                                               next_offset - (sizeof (*ip) +
 187                                                              sizeof (*udp) +
 188                                                              sizeof (*h)));
 189       h->version_length =
 190         version_length (next_offset - (sizeof (*ip) + sizeof (*udp)));
 191
 192       sum0 = ip->checksum;
 193       old_l0 = ip->length;
 194       new_l0 = clib_host_to_net_u16 ((u16) next_offset);
 195       sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
 196                              length /* changed member */ );
 197
 198       ip->checksum = ip_csum_fold (sum0);
 199       ip->length = new_l0;
 200       udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
 201
 202       udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
 203       if (udp->checksum == 0)
 204         udp->checksum = 0xffff;
 205
 206       ASSERT (ip->checksum == ip4_header_checksum (ip));
 207
 208       to_next[0] = bi0;
 209       f->n_vectors++;
 210       to_next++;
 211
 212       if (f->n_vectors == VLIB_FRAME_SIZE)
 213         {
 214           vlib_put_frame_to_node (vm, node_index, f);
 215           f = vlib_get_frame_to_node (vm, node_index);
 216           f->n_vectors = 0;
 217           to_next = vlib_frame_vector_args (f);
 218         }
 219       b0 = 0;
 220       bi0 = ~0;
 221     }
 222   return f;
 223 }
 224
 225 clib_error_t *
 226 udp_ping_flow_create (u8 del)
 227 {
 228   vnet_flow_report_add_del_args_t args;
 229   int rv;
 230   u32 domain_id = 0;
 231   flow_report_main_t *frm = &flow_report_main;
 232   u16 template_id;
 233
 234   memset (&args, 0, sizeof (args));
 235   args.rewrite_callback = udp_ping_template_rewrite;
 236   args.flow_data_callback = udp_ping_send_flows;
 237   del ? (args.is_add = 0) : (args.is_add = 1);
 238   args.domain_id = domain_id;
 239   args.src_port = UDP_DST_PORT_ipfix;
 240
 241   rv = vnet_flow_report_add_del (frm, &args, &template_id);
 242
 243   switch (rv)
 244     {
 245     case 0:
 246       break;
 247     case VNET_API_ERROR_NO_SUCH_ENTRY:
 248       return clib_error_return (0, "registration not found...");
 249     default:
 250       return clib_error_return (0, "vnet_flow_report_add_del returned %d",
 251                                 rv);
 252     }
 253
 254   return 0;
 255 }
 256
 257 static clib_error_t *
 258 set_udp_ping_export_command_fn (vlib_main_t * vm, unformat_input_t * input,
 259                                 vlib_cli_command_t * cmd)
 260 {
 261   //int rv;
 262   int is_add = 1;
 263
 264   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 265     {
 266       if (unformat (input, "export-ipfix"))
 267         is_add = 1;
 268       else if (unformat (input, "disable"))
 269         is_add = 0;
 270       else
 271         break;
 272     }
 273
 274   if (is_add)
 275     (void) udp_ping_flow_create (0);
 276   else
 277     (void) udp_ping_flow_create (1);
 278
 279   return 0;
 280 }
 281
 282 /* *INDENT-OFF* */
 283 VLIB_CLI_COMMAND (set_udp_ping_export_command, static) = {
 284     .path = "set udp-ping export-ipfix",
 285     .short_help = "set udp-ping export-ipfix [disable]",
 286     .function = set_udp_ping_export_command_fn,
 287 };
 288 /* *INDENT-ON* */
 289
 290 clib_error_t *
 291 udp_ping_flow_report_init (vlib_main_t * vm)
 292 {
 293   clib_error_t *error;
 294
 295   if ((error = vlib_call_init_function (vm, flow_report_init)))
 296     return error;
 297
 298   return 0;
 299 }
 300
 301 VLIB_INIT_FUNCTION (udp_ping_flow_report_init);
 302
 303 /*
 304  * fd.io coding-style-patch-verification: ON
 305  *
 306  * Local Variables:
 307  * eval: (c-set-style "gnu")
 308  * End:
 309  */