FD.io VPP  v18.07.1-19-g511ce25
Vector Packet Processing
mc_socket.c
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1 /*
2  * mc_socket.c: socket based multicast for vlib mc
3  *
4  * Copyright (c) 2010 Cisco and/or its affiliates.
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #include <vlib/vlib.h>
19 #include <vlib/unix/mc_socket.h>
20 
21 #include <sys/ioctl.h> /* for FIONBIO */
22 #include <netinet/tcp.h> /* for TCP_NODELAY */
23 #include <net/if.h> /* for struct ifreq */
24 
25 static u8 *
26 format_socket_peer_id (u8 * s, va_list * args)
27 {
28  u64 peer_id_as_u64 = va_arg (*args, u64);
29  mc_peer_id_t peer_id;
30  peer_id.as_u64 = peer_id_as_u64;
32  u32 p = mc_socket_peer_id_get_port (peer_id);
33 
34  s = format (s, "%U:%04x", format_network_address, AF_INET, &a, ntohs (p));
35 
36  return s;
37 }
38 
39 typedef void (mc_msg_handler_t) (mc_main_t * mcm, void *msg,
40  u32 buffer_index);
41 
42 always_inline void
44  u32 buffer_index, u32 handler_frees_buffer, void *_h)
45 {
46  vlib_main_t *vm = mcm->vlib_main;
47  mc_msg_handler_t *h = _h;
48  vlib_buffer_t *b = vlib_get_buffer (vm, buffer_index);
49  void *the_msg = vlib_buffer_get_current (b);
50 
51  h (mcm, the_msg, buffer_index);
52  if (!handler_frees_buffer)
53  vlib_buffer_free_one (vm, buffer_index);
54 }
55 
56 static uword
58  u32 buffer_index, struct iovec **iovs_return)
59 {
60  struct iovec *i;
61  vlib_buffer_t *b;
62  u32 bi = buffer_index;
63  u32 l = 0;
64 
65  while (1)
66  {
67  b = vlib_get_buffer (vm, bi);
68  vec_add2 (*iovs_return, i, 1);
69  i->iov_base = vlib_buffer_get_current (b);
70  i->iov_len = b->current_length;
71  l += i->iov_len;
72  if (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))
73  break;
74  bi = b->next_buffer;
75  }
76 
77  return l;
78 }
79 
80 static clib_error_t *
82  int socket, struct sockaddr_in *tx_addr, u32 buffer_index)
83 {
85  struct msghdr h;
86  word n_bytes, n_bytes_tx, n_retries;
87 
88  memset (&h, 0, sizeof (h));
89  h.msg_name = tx_addr;
90  h.msg_namelen = sizeof (tx_addr[0]);
91 
92  if (msm->iovecs)
93  _vec_len (msm->iovecs) = 0;
94 
95  n_bytes = append_buffer_index_to_iovec (vm, buffer_index, &msm->iovecs);
96  ASSERT (n_bytes <= msm->mc_main.transport.max_packet_size);
97  if (n_bytes > msm->mc_main.transport.max_packet_size)
98  clib_error ("sending packet larger than interace MTU %d bytes", n_bytes);
99 
100  h.msg_iov = msm->iovecs;
101  h.msg_iovlen = vec_len (msm->iovecs);
102 
103  n_retries = 0;
104  while ((n_bytes_tx = sendmsg (socket, &h, /* flags */ 0)) != n_bytes
105  && errno == EAGAIN)
106  n_retries++;
107  if (n_bytes_tx != n_bytes)
108  {
109  clib_unix_warning ("sendmsg");
110  return 0;
111  }
112  if (n_retries)
113  {
114  ELOG_TYPE_DECLARE (e) =
115  {
116  .format = "sendmsg-helper: %d retries",.format_args = "i4",};
117  struct
118  {
119  u32 retries;
120  } *ed = 0;
121 
122  ed = ELOG_DATA (&vm->elog_main, e);
123  ed->retries = n_retries;
124  }
125  return 0;
126 }
127 
128 static clib_error_t *
129 tx_buffer (void *transport, mc_transport_type_t type, u32 buffer_index)
130 {
131  mc_socket_main_t *msm = (mc_socket_main_t *) transport;
133  mc_multicast_socket_t *ms = &msm->multicast_sockets[type];
134  clib_error_t *error;
135  error = sendmsg_helper (msm, ms->socket, &ms->tx_addr, buffer_index);
137  vlib_buffer_free_one (vm, buffer_index);
138  return error;
139 }
140 
141 static clib_error_t *
142 tx_ack (void *transport, mc_peer_id_t dest_peer_id, u32 buffer_index)
143 {
144  struct sockaddr_in tx_addr;
145  mc_socket_main_t *msm = (mc_socket_main_t *) transport;
147  clib_error_t *error;
148 
149  memset (&tx_addr, 0, sizeof (tx_addr));
150  tx_addr.sin_family = AF_INET;
151  tx_addr.sin_addr.s_addr = mc_socket_peer_id_get_address (dest_peer_id);
152  tx_addr.sin_port = mc_socket_peer_id_get_port (dest_peer_id);
153 
154  error = sendmsg_helper (msm, msm->ack_socket, &tx_addr, buffer_index);
155  vlib_buffer_free_one (vm, buffer_index);
156  return error;
157 }
158 
159 static clib_error_t *
161  int socket,
162  struct sockaddr_in *rx_addr,
163  u32 * buffer_index, u32 drop_message)
164 {
166  vlib_buffer_t *b;
167  uword n_left, n_alloc, n_mtu, i, i_rx;
168  const uword buffer_size = VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES;
169  word n_bytes_left;
170 
171  /* Make sure we have at least a MTU worth of buffers. */
172  n_mtu = msm->rx_mtu_n_buffers;
173  n_left = vec_len (msm->rx_buffers);
174  if (n_left < n_mtu)
175  {
176  uword max_alloc = 8 * n_mtu;
177  vec_validate (msm->rx_buffers, max_alloc - 1);
178  n_alloc =
179  vlib_buffer_alloc (vm, msm->rx_buffers + n_left, max_alloc - n_left);
180  _vec_len (msm->rx_buffers) = n_left + n_alloc;
181  }
182 
183  ASSERT (vec_len (msm->rx_buffers) >= n_mtu);
184  vec_validate (msm->iovecs, n_mtu - 1);
185 
186  /* Allocate RX buffers from end of rx_buffers.
187  Turn them into iovecs to pass to readv. */
188  i_rx = vec_len (msm->rx_buffers) - 1;
189  for (i = 0; i < n_mtu; i++)
190  {
191  b = vlib_get_buffer (vm, msm->rx_buffers[i_rx - i]);
192  msm->iovecs[i].iov_base = b->data;
193  msm->iovecs[i].iov_len = buffer_size;
194  }
195  _vec_len (msm->iovecs) = n_mtu;
196 
197  {
198  struct msghdr h;
199 
200  memset (&h, 0, sizeof (h));
201  if (rx_addr)
202  {
203  h.msg_name = rx_addr;
204  h.msg_namelen = sizeof (rx_addr[0]);
205  }
206  h.msg_iov = msm->iovecs;
207  h.msg_iovlen = vec_len (msm->iovecs);
208 
209  n_bytes_left = recvmsg (socket, &h, 0);
210  if (n_bytes_left < 0)
211  return clib_error_return_unix (0, "recvmsg");
212  }
213 
214  if (drop_message)
215  {
216  *buffer_index = ~0;
217  return 0;
218  }
219 
220  *buffer_index = msm->rx_buffers[i_rx];
221  while (1)
222  {
223  b = vlib_get_buffer (vm, msm->rx_buffers[i_rx]);
224 
225  b->flags = 0;
226  b->current_data = 0;
227  b->current_length =
228  n_bytes_left < buffer_size ? n_bytes_left : buffer_size;
229 
230  n_bytes_left -= buffer_size;
231 
232  if (n_bytes_left <= 0)
233  break;
234 
235  i_rx--;
236  b->flags |= VLIB_BUFFER_NEXT_PRESENT;
237  b->next_buffer = msm->rx_buffers[i_rx];
238  }
239 
240  _vec_len (msm->rx_buffers) = i_rx;
241 
242  return 0 /* no error */ ;
243 }
244 
245 static clib_error_t *
247 {
249  mc_main_t *mcm = &msm->mc_main;
252  clib_error_t *error;
253  u32 bi = 0;
254 
255  error = recvmsg_helper (msm, ms->socket, /* rx_addr */ 0, &bi, /* drop_message */
256  0);
257  if (!error)
258  msg_handler (mcm, bi,
259  /* handler_frees_buffer */ 0,
261 
262  return error;
263 }
264 
265 static clib_error_t *
267 {
269  mc_main_t *mcm = &msm->mc_main;
271  mc_multicast_socket_t *ms_to_relay =
273  mc_multicast_socket_t *ms_from_relay =
275  clib_error_t *error;
276  u32 bi = 0;
277  u32 is_master = mcm->relay_state == MC_RELAY_STATE_MASTER;
278 
279  /* Not the ordering master? Turf the msg */
280  error = recvmsg_helper (msm, ms_to_relay->socket, /* rx_addr */ 0, &bi,
281  /* drop_message */ !is_master);
282 
283  /* If we are the master, number and rebroadcast the msg. */
284  if (!error && is_master)
285  {
286  vlib_buffer_t *b = vlib_get_buffer (vm, bi);
287  mc_msg_user_request_t *mp = vlib_buffer_get_current (b);
288  mp->global_sequence = clib_host_to_net_u32 (mcm->relay_global_sequence);
289  mcm->relay_global_sequence++;
290  error =
291  sendmsg_helper (msm, ms_from_relay->socket, &ms_from_relay->tx_addr,
292  bi);
293  vlib_buffer_free_one (vm, bi);
294  }
295 
296  return error;
297 }
298 
299 static clib_error_t *
301 {
303  mc_main_t *mcm = &msm->mc_main;
306  clib_error_t *error;
307  u32 bi = 0;
308 
309  error = recvmsg_helper (msm, ms->socket, /* rx_addr */ 0, &bi, /* drop_message */
310  0);
311  if (!error)
312  {
313  msg_handler (mcm, bi, /* handler_frees_buffer */ 1,
315  }
316  return error;
317 }
318 
319 static clib_error_t *
321 {
323  mc_main_t *mcm = &msm->mc_main;
324  vlib_main_t *vm = mcm->vlib_main;
326  clib_error_t *error;
327  u32 bi = 0;
328 
329  error = recvmsg_helper (msm, ms->socket, /* rx_addr */ 0, &bi, /* drop_message */
330  0);
331  if (!error)
332  {
333  vlib_buffer_t *b = vlib_get_buffer (vm, bi);
334  mc_msg_join_or_leave_request_t *mp = vlib_buffer_get_current (b);
335 
336  switch (clib_host_to_net_u32 (mp->type))
337  {
338  case MC_MSG_TYPE_join_or_leave_request:
339  msg_handler (mcm, bi, /* handler_frees_buffer */ 0,
341  break;
342 
343  case MC_MSG_TYPE_join_reply:
344  msg_handler (mcm, bi, /* handler_frees_buffer */ 0,
346  break;
347 
348  default:
349  ASSERT (0);
350  break;
351  }
352  }
353  return error;
354 }
355 
356 static clib_error_t *
358 {
360  mc_main_t *mcm = &msm->mc_main;
361  clib_error_t *error;
362  u32 bi = 0;
363 
364  error = recvmsg_helper (msm, msm->ack_socket, /* rx_addr */ 0, &bi,
365  /* drop_message */ 0);
366  if (!error)
367  msg_handler (mcm, bi, /* handler_frees_buffer */ 0,
369  return error;
370 }
371 
372 static void
375  clib_file_t * uf)
376 {
378  clib_file_del (um, uf);
379  vec_free (c->input_vector);
380  vec_free (c->output_vector);
381  pool_put (msm->catchups, c);
382 }
383 
384 static mc_socket_catchup_t *
386  int file_descriptor)
387 {
388  uword *p =
389  hash_get (msm->catchup_index_by_file_descriptor, file_descriptor);
390  return p ? pool_elt_at_index (msm->catchups, p[0]) : 0;
391 }
392 
393 static clib_error_t *
395 {
398  mc_main_t *mcm = &msm->mc_main;
401  word l, n, is_eof;
402 
403  l = vec_len (c->input_vector);
404  vec_resize (c->input_vector, 4096);
405  n =
406  read (uf->file_descriptor, c->input_vector + l,
407  vec_len (c->input_vector) - l);
408  is_eof = n == 0;
409 
410  if (n < 0)
411  {
412  if (errno == EAGAIN)
413  n = 0;
414  else
415  {
416  catchup_cleanup (msm, c, um, uf);
417  return clib_error_return_unix (0, "read");
418  }
419  }
420 
421  _vec_len (c->input_vector) = l + n;
422 
423  if (is_eof && vec_len (c->input_vector) > 0)
424  {
425  if (is_server)
426  {
427  mc_msg_catchup_request_handler (mcm, (void *) c->input_vector,
428  c - msm->catchups);
429  _vec_len (c->input_vector) = 0;
430  }
431  else
432  {
433  mc_msg_catchup_reply_handler (mcm, (void *) c->input_vector,
434  c - msm->catchups);
435  c->input_vector = 0; /* reply handler is responsible for freeing vector */
436  catchup_cleanup (msm, c, um, uf);
437  }
438  }
439 
440  return 0 /* no error */ ;
441 }
442 
443 static clib_error_t *
445 {
446  return catchup_socket_read_ready (uf, /* is_server */ 1);
447 }
448 
449 static clib_error_t *
451 {
452  if (MC_EVENT_LOGGING)
453  {
456 
457  ELOG_TYPE (e, "catchup_client_read_ready");
458  ELOG (&vm->elog_main, e, 0);
459  }
460  return catchup_socket_read_ready (uf, /* is_server */ 0);
461 }
462 
463 static clib_error_t *
465 {
470  clib_error_t *error = 0;
471  int n;
472 
473  if (c->connect_in_progress)
474  {
475  u32 len, value;
476 
477  c->connect_in_progress = 0;
478  len = sizeof (value);
479  if (getsockopt (c->socket, SOL_SOCKET, SO_ERROR, &value, &len) < 0)
480  {
481  error = clib_error_return_unix (0, "getsockopt SO_ERROR");
482  goto error_quit;
483  }
484  if (value != 0)
485  {
486  error =
488  "connect fails");
489  goto error_quit;
490  }
491  }
492 
493  while (1)
494  {
495  u32 n_this_write;
496 
497  n_this_write =
498  clib_min (vec_len (c->output_vector) - c->output_vector_n_written,
499  msm->rx_mtu_n_bytes -
500  64 /* ip + tcp + option allowance */ );
501 
502  if (n_this_write <= 0)
503  break;
504 
505  do
506  {
507  n = write (uf->file_descriptor,
508  c->output_vector + c->output_vector_n_written,
509  n_this_write);
510  }
511  while (n < 0 && errno == EAGAIN);
512 
513  if (n < 0)
514  {
515  error = clib_error_return_unix (0, "write");
516  goto error_quit;
517  }
518  c->output_vector_n_written += n;
519  }
520 
521  if (c->output_vector_n_written >= vec_len (c->output_vector))
522  {
523  if (!is_server)
524  {
527  /* Send EOF to other side. */
528  shutdown (uf->file_descriptor, SHUT_WR);
529  return error;
530  }
531  else
532  {
533  error_quit:
534  catchup_cleanup (msm, c, um, uf);
535  }
536  }
537  return error;
538 }
539 
540 static clib_error_t *
542 {
543  return catchup_socket_write_ready (uf, /* is_server */ 1);
544 }
545 
546 static clib_error_t *
548 {
549  return catchup_socket_write_ready (uf, /* is_server */ 0);
550 }
551 
552 static clib_error_t *
554 {
559  catchup_cleanup (msm, c, um, uf);
560  return clib_error_return (0, "error");
561 }
562 
563 static clib_error_t *
565 {
567  struct sockaddr_in client_addr;
568  int client_len;
570  clib_file_t template = { 0 };
571 
572  pool_get (msm->catchups, c);
573  memset (c, 0, sizeof (c[0]));
574 
575  client_len = sizeof (client_addr);
576 
577  /* Acquires the non-blocking attrib from the server socket. */
578  c->socket = accept (uf->file_descriptor,
579  (struct sockaddr *) &client_addr,
580  (socklen_t *) & client_len);
581 
582  if (c->socket < 0)
583  {
584  pool_put (msm->catchups, c);
585  return clib_error_return_unix (0, "accept");
586  }
587 
588  if (MC_EVENT_LOGGING)
589  {
590  mc_main_t *mcm = &msm->mc_main;
591  vlib_main_t *vm = mcm->vlib_main;
592 
593  ELOG_TYPE_DECLARE (e) =
594  {
595  .format = "catchup accepted from 0x%lx",.format_args = "i4",};
596  struct
597  {
598  u32 addr;
599  } *ed = 0;
600 
601  ed = ELOG_DATA (&vm->elog_main, e);
602  ed->addr = ntohl (client_addr.sin_addr.s_addr);
603  }
604 
605  /* Disable the Nagle algorithm, ship catchup pkts immediately */
606  {
607  int one = 1;
608  if ((setsockopt (c->socket, IPPROTO_TCP,
609  TCP_NODELAY, (void *) &one, sizeof (one))) < 0)
610  {
611  clib_unix_warning ("catchup socket: set TCP_NODELAY");
612  }
613  }
614 
615  template.read_function = catchup_server_read_ready;
616  template.write_function = catchup_server_write_ready;
617  template.error_function = catchup_socket_error_ready;
618  template.file_descriptor = c->socket;
619  template.private_data = pointer_to_uword (msm);
620  c->clib_file_index = clib_file_add (&file_main, &template);
621  hash_set (msm->catchup_index_by_file_descriptor, c->socket,
622  c - msm->catchups);
623 
624  return 0;
625 }
626 
627 /* Return and bind to an unused port. */
628 static word
630 {
631  for (; port < 1 << 16; port++)
632  {
633  struct sockaddr_in a;
634 
635  memset (&a, 0, sizeof (a)); /* Warnings be gone */
636 
637  a.sin_family = PF_INET;
638  a.sin_addr.s_addr = INADDR_ANY;
639  a.sin_port = htons (port);
640 
641  if (bind (sock, (struct sockaddr *) &a, sizeof (a)) >= 0)
642  break;
643  }
644 
645  return port < 1 << 16 ? port : -1;
646 }
647 
648 static clib_error_t *
651  char *type, uword udp_port)
652 {
653  int one = 1;
654  struct ip_mreq mcast_req;
655 
656  if (!msm->multicast_ttl)
657  msm->multicast_ttl = 1;
658 
659  /* mastership (multicast) TX socket */
660  if ((ms->socket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
661  return clib_error_return_unix (0, "%s socket", type);
662 
663  {
664  u8 ttl = msm->multicast_ttl;
665 
666  if ((setsockopt (ms->socket, IPPROTO_IP,
667  IP_MULTICAST_TTL, (void *) &ttl, sizeof (ttl))) < 0)
668  return clib_error_return_unix (0, "%s set multicast ttl", type);
669  }
670 
671  if (setsockopt (ms->socket, SOL_SOCKET, SO_REUSEADDR, &one, sizeof (one)) <
672  0)
673  return clib_error_return_unix (0, "%s setsockopt SO_REUSEADDR", type);
674 
675  memset (&ms->tx_addr, 0, sizeof (ms->tx_addr));
676  ms->tx_addr.sin_family = AF_INET;
677  ms->tx_addr.sin_addr.s_addr =
679  ms->tx_addr.sin_port = htons (udp_port);
680 
681  if (bind (ms->socket, (struct sockaddr *) &ms->tx_addr,
682  sizeof (ms->tx_addr)) < 0)
683  return clib_error_return_unix (0, "%s bind", type);
684 
685  memset (&mcast_req, 0, sizeof (mcast_req));
686  mcast_req.imr_multiaddr.s_addr =
688  mcast_req.imr_interface.s_addr = msm->if_ip4_address_net_byte_order;
689 
690  if ((setsockopt (ms->socket, IPPROTO_IP,
691  IP_ADD_MEMBERSHIP, (void *) &mcast_req,
692  sizeof (mcast_req))) < 0)
693  return clib_error_return_unix (0, "%s IP_ADD_MEMBERSHIP setsockopt",
694  type);
695 
696  if (ioctl (ms->socket, FIONBIO, &one) < 0)
697  return clib_error_return_unix (0, "%s set FIONBIO", type);
698 
699  /* FIXME remove this when we support tx_ready. */
700  {
701  u32 len = 1 << 20;
702  socklen_t sl = sizeof (len);
703  if (setsockopt (ms->socket, SOL_SOCKET, SO_SNDBUF, &len, sl) < 0)
704  clib_unix_error ("setsockopt");
705  }
706 
707  return 0;
708 }
709 
710 static clib_error_t *
712 {
713  int one = 1;
714  clib_error_t *error;
715  u32 port;
716 
719  0xffff - ((MC_N_TRANSPORT_TYPE + 2 /* ack socket, catchup socket */ )
720  - 1);
721 
723 
724  error = setup_mutlicast_socket (msm,
725  &msm->multicast_sockets
726  [MC_TRANSPORT_MASTERSHIP], "mastership",
727  port++);
728  if (error)
729  return error;
730 
731  error = setup_mutlicast_socket (msm,
733  "join", port++);
734  if (error)
735  return error;
736 
737  error = setup_mutlicast_socket (msm,
738  &msm->multicast_sockets
740  "to relay", port++);
741  if (error)
742  return error;
743 
744  error = setup_mutlicast_socket (msm,
745  &msm->multicast_sockets
747  "from relay", port++);
748  if (error)
749  return error;
750 
751  /* ACK rx socket */
752  msm->ack_socket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
753  if (msm->ack_socket < 0)
754  return clib_error_return_unix (0, "ack socket");
755 
756  msm->ack_udp_port = find_and_bind_to_free_port (msm->ack_socket, port++);
757 
758  if (ioctl (msm->ack_socket, FIONBIO, &one) < 0)
759  return clib_error_return_unix (0, "ack socket FIONBIO");
760 
761  msm->catchup_server_socket = socket (AF_INET, SOCK_STREAM, 0);
762  if (msm->catchup_server_socket < 0)
763  return clib_error_return_unix (0, "catchup server socket");
764 
765  msm->catchup_tcp_port =
767 
768  if (ioctl (msm->catchup_server_socket, FIONBIO, &one) < 0)
769  return clib_error_return_unix (0, "catchup server socket FIONBIO");
770 
771  if (listen (msm->catchup_server_socket, 5) < 0)
772  return clib_error_return_unix (0, "catchup server socket listen");
773 
774  /* epoll setup for multicast mastership socket */
775  {
776  clib_file_t template = { 0 };
777 
779  template.file_descriptor =
781  template.private_data = (uword) msm;
782  clib_file_add (&file_main, &template);
783 
784  /* epoll setup for multicast to_relay socket */
785  template.read_function = to_relay_socket_read_ready;
786  template.file_descriptor =
788  template.private_data = (uword) msm;
789  clib_file_add (&file_main, &template);
790 
791  /* epoll setup for multicast from_relay socket */
792  template.read_function = from_relay_socket_read_ready;
793  template.file_descriptor =
795  template.private_data = (uword) msm;
796  clib_file_add (&file_main, &template);
797 
798  template.read_function = join_socket_read_ready;
799  template.file_descriptor =
801  template.private_data = (uword) msm;
802  clib_file_add (&file_main, &template);
803 
804  /* epoll setup for ack rx socket */
805  template.read_function = ack_socket_read_ready;
806  template.file_descriptor = msm->ack_socket;
807  template.private_data = (uword) msm;
808  clib_file_add (&file_main, &template);
809 
810  /* epoll setup for TCP catchup server */
811  template.read_function = catchup_listen_read_ready;
812  template.file_descriptor = msm->catchup_server_socket;
813  template.private_data = (uword) msm;
814  clib_file_add (&file_main, &template);
815  }
816 
817  return 0;
818 }
819 
820 static void *
822  u8 * set_output_vector)
823 {
825  c->clib_file_index);
826  u8 *result = 0;
827 
828  if (set_output_vector)
829  c->output_vector = set_output_vector;
830  else
831  vec_add2 (c->output_vector, result, n_bytes);
832  if (vec_len (c->output_vector) > 0)
833  {
834  int skip_update = 0 != (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE);
836  if (!skip_update)
838  }
839  return result;
840 }
841 
842 static uword
843 catchup_request_fun (void *transport_main,
844  u32 stream_index, mc_peer_id_t catchup_peer_id)
845 {
846  mc_socket_main_t *msm = (mc_socket_main_t *) transport_main;
847  mc_main_t *mcm = &msm->mc_main;
848  vlib_main_t *vm = mcm->vlib_main;
850  struct sockaddr_in addr;
852  int one = 1;
853 
854  pool_get (msm->catchups, c);
855  memset (c, 0, sizeof (*c));
856 
857  c->socket = socket (AF_INET, SOCK_STREAM, 0);
858  if (c->socket < 0)
859  {
860  clib_unix_warning ("socket");
861  return 0;
862  }
863 
864  if (ioctl (c->socket, FIONBIO, &one) < 0)
865  {
866  clib_unix_warning ("FIONBIO");
867  return 0;
868  }
869 
870  memset (&addr, 0, sizeof (addr));
871  addr.sin_family = AF_INET;
872  addr.sin_addr.s_addr = mc_socket_peer_id_get_address (catchup_peer_id);
873  addr.sin_port = mc_socket_peer_id_get_port (catchup_peer_id);
874 
875  c->connect_in_progress = 1;
876 
877  if (MC_EVENT_LOGGING)
878  {
879  ELOG_TYPE_DECLARE (e) =
880  {
881  .format = "connecting to peer 0x%Lx",.format_args = "i8",};
882  struct
883  {
884  u64 peer;
885  } *ed;
886  ed = ELOG_DATA (&vm->elog_main, e);
887  ed->peer = catchup_peer_id.as_u64;
888  }
889 
890  if (connect (c->socket, (const void *) &addr, sizeof (addr))
891  < 0 && errno != EINPROGRESS)
892  {
893  clib_unix_warning ("connect to %U fails",
894  format_socket_peer_id, catchup_peer_id);
895  return 0;
896  }
897 
898  {
899  clib_file_t template = { 0 };
900 
902  template.write_function = catchup_client_write_ready;
903  template.error_function = catchup_socket_error_ready;
904  template.file_descriptor = c->socket;
905  template.private_data = (uword) msm;
906  c->clib_file_index = clib_file_add (um, &template);
907 
909  c - msm->catchups);
910  }
911 
912  {
913  mc_msg_catchup_request_t *mp;
914  mp = catchup_add_pending_output (c, sizeof (mp[0]), /* set_output_vector */
915  0);
916  mp->peer_id = msm->mc_main.transport.our_catchup_peer_id;
917  mp->stream_index = stream_index;
919  }
920 
921  return c - msm->catchups;
922 }
923 
924 static void
925 catchup_send_fun (void *transport_main, uword opaque, u8 * data)
926 {
927  mc_socket_main_t *msm = (mc_socket_main_t *) transport_main;
929  catchup_add_pending_output (c, 0, data);
930 }
931 
932 static int
934 {
935  int fd;
936  struct ifreq ifr;
937  struct sockaddr_in *sa;
938 
939  /* Dig up our IP address */
940  fd = socket (PF_INET, AF_INET, 0);
941  if (fd < 0)
942  {
943  clib_unix_error ("socket");
944  return -1;
945  }
946 
947  ifr.ifr_addr.sa_family = AF_INET;
948  strncpy (ifr.ifr_name, if_name, sizeof (ifr.ifr_name) - 1);
949  if (ioctl (fd, SIOCGIFADDR, &ifr) < 0)
950  {
951  clib_unix_error ("ioctl(SIOCFIGADDR)");
952  close (fd);
953  return -1;
954  }
955 
956  sa = (void *) &ifr.ifr_addr;
957  clib_memcpy (ip4_address, &sa->sin_addr.s_addr, sizeof (ip4_address[0]));
958 
959  if (ioctl (fd, SIOCGIFMTU, &ifr) < 0)
960  {
961  close (fd);
962  return -1;
963  }
964  if (mtu)
965  *mtu = ifr.ifr_mtu - ( /* IP4 header */ 20 + /* UDP header */ 8);
966 
967  close (fd);
968 
969  return 0;
970 }
971 
972 clib_error_t *
973 mc_socket_main_init (mc_socket_main_t * msm, char **intfc_probe_list,
974  int n_intfcs_to_probe)
975 {
976  clib_error_t *error;
977  mc_main_t *mcm;
978  u32 mtu;
979 
980  mcm = &msm->mc_main;
981 
982  /* 239.255.0.7 */
985 
986  {
987  u32 i, a, win;
988 
989  win = 0;
990  if (msm->multicast_interface_name)
991  {
992  win =
994  &mtu);
995  }
996  else
997  {
998  for (i = 0; i < n_intfcs_to_probe; i++)
999  if (!find_interface_ip4_address (intfc_probe_list[i], &a, &mtu))
1000  {
1001  win = 1;
1002  msm->multicast_interface_name = intfc_probe_list[i];
1003  break;
1004  }
1005  }
1006 
1007  if (!win)
1008  return clib_error_return (0, "can't find interface ip4 address");
1009 
1011  }
1012 
1013  msm->rx_mtu_n_bytes = mtu;
1014  msm->rx_mtu_n_buffers =
1016  msm->rx_mtu_n_buffers +=
1018 
1019  error = socket_setup (msm);
1020  if (error)
1021  return error;
1022 
1023  mcm->transport.our_ack_peer_id =
1025  msm->ack_udp_port);
1026 
1029  msm->catchup_tcp_port);
1030 
1031  mcm->transport.tx_buffer = tx_buffer;
1032  mcm->transport.tx_ack = tx_ack;
1036  mcm->transport.opaque = msm;
1037  mcm->transport.max_packet_size = mtu;
1038 
1039  mc_main_init (mcm, "socket");
1040 
1041  return error;
1042 }
1043 
1044 /*
1045  * fd.io coding-style-patch-verification: ON
1046  *
1047  * Local Variables:
1048  * eval: (c-set-style "gnu")
1049  * End:
1050  */
void mc_main_init(mc_main_t *mcm, char *tag)
Definition: mc.c:2417
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:437
static void msg_handler(mc_main_t *mcm, u32 buffer_index, u32 handler_frees_buffer, void *_h)
Definition: mc_socket.c:43
static void clib_file_del(clib_file_main_t *um, clib_file_t *f)
Definition: file.h:109
static clib_error_t * catchup_listen_read_ready(clib_file_t *uf)
Definition: mc_socket.c:564
#define hash_set(h, key, value)
Definition: hash.h:255
#define clib_min(x, y)
Definition: clib.h:289
int catchup_server_socket
Definition: mc_socket.h:54
#define hash_unset(h, key)
Definition: hash.h:261
a
Definition: bitmap.h:538
#define clib_error(format, args...)
Definition: error.h:62
unsigned long u64
Definition: types.h:89
static void catchup_cleanup(mc_socket_main_t *msm, mc_socket_catchup_t *c, clib_file_main_t *um, clib_file_t *uf)
Definition: mc_socket.c:373
void mc_msg_master_assert_handler(mc_main_t *mcm, mc_msg_master_assert_t *mp, u32 buffer_index)
Definition: mc.c:1891
static_always_inline mc_peer_id_t mc_socket_set_peer_id(u32 address_net_byte_order, u32 port_host_byte_order)
Definition: mc_socket.h:109
#define ELOG(em, f, data)
Definition: elog.h:471
u32 file_descriptor
Definition: file.h:54
void mc_msg_user_ack_handler(mc_main_t *mcm, mc_msg_user_ack_t *mp, u32 buffer_index)
Definition: mc.c:1223
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
Definition: vec.h:562
int i
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
static clib_error_t * catchup_client_read_ready(clib_file_t *uf)
Definition: mc_socket.c:450
void mc_msg_join_reply_handler(mc_main_t *mcm, mc_msg_join_reply_t *mp, u32 buffer_index)
Definition: mc.c:971
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:228
vhost_vring_addr_t addr
Definition: vhost_user.h:116
unsigned char u8
Definition: types.h:56
mc_main_t * mc_main
Definition: main.h:153
#define clib_unix_error(format, args...)
Definition: error.h:65
mc_multicast_socket_t multicast_sockets[MC_N_TRANSPORT_TYPE]
Definition: mc_socket.h:48
clib_file_function_t * read_function
Definition: file.h:67
struct iovec * iovecs
Definition: mc_socket.h:70
clib_file_t * file_pool
Definition: file.h:88
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:104
static clib_error_t * tx_buffer(void *transport, mc_transport_type_t type, u32 buffer_index)
Definition: mc_socket.c:129
static clib_error_t * catchup_socket_error_ready(clib_file_t *uf)
Definition: mc_socket.c:553
void mc_msg_catchup_reply_handler(mc_main_t *mcm, mc_msg_catchup_reply_t *mp, u32 catchup_opaque)
Definition: mc.c:1584
i64 word
Definition: types.h:111
static clib_error_t * ack_socket_read_ready(clib_file_t *uf)
Definition: mc_socket.c:357
#define always_inline
Definition: clib.h:92
void * opaque
Definition: mc.h:299
#define clib_error_return(e, args...)
Definition: error.h:99
clib_file_main_t file_main
Definition: main.c:63
#define VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES
Definition: buffer.h:440
static clib_error_t * setup_mutlicast_socket(mc_socket_main_t *msm, mc_multicast_socket_t *ms, char *type, uword udp_port)
Definition: mc_socket.c:649
mc_peer_id_t our_catchup_peer_id
Definition: mc.h:302
#define vec_resize(V, N)
Resize a vector (no header, unspecified alignment) Add N elements to end of given vector V...
Definition: vec.h:240
unsigned int u32
Definition: types.h:88
static clib_error_t * sendmsg_helper(mc_socket_main_t *msm, int socket, struct sockaddr_in *tx_addr, u32 buffer_index)
Definition: mc_socket.c:81
u32 * rx_buffers
Definition: mc_socket.h:67
mc_main_t mc_main
Definition: mc_socket.h:45
mc_socket_catchup_t * catchups
Definition: mc_socket.h:57
#define hash_get(h, key)
Definition: hash.h:249
static u8 * format_socket_peer_id(u8 *s, va_list *args)
Definition: mc_socket.c:26
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:464
u32 base_multicast_udp_port_host_byte_order
Definition: mc_socket.h:91
static word find_and_bind_to_free_port(word sock, word port)
Definition: mc_socket.c:629
u64 as_u64
Definition: mc.h:43
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:108
static clib_error_t * catchup_server_write_ready(clib_file_t *uf)
Definition: mc_socket.c:541
#define clib_error_return_unix(e, args...)
Definition: error.h:102
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:202
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:274
static u32 mc_socket_peer_id_get_port(mc_peer_id_t i)
Definition: mc_socket.h:103
#define ELOG_DATA(em, f)
Definition: elog.h:481
static int find_interface_ip4_address(char *if_name, u32 *ip4_address, u32 *mtu)
Definition: mc_socket.c:933
u32 flags
Definition: file.h:56
static clib_error_t * mastership_socket_read_ready(clib_file_t *uf)
Definition: mc_socket.c:246
static uword append_buffer_index_to_iovec(vlib_main_t *vm, u32 buffer_index, struct iovec **iovs_return)
Definition: mc_socket.c:57
uword * catchup_index_by_file_descriptor
Definition: mc_socket.h:59
void(* file_update)(clib_file_t *file, clib_file_update_type_t update_type)
Definition: file.h:90
static void * catchup_add_pending_output(mc_socket_catchup_t *c, uword n_bytes, u8 *set_output_vector)
Definition: mc_socket.c:821
mc_peer_id_t our_ack_peer_id
Definition: mc.h:301
static void catchup_send_fun(void *transport_main, uword opaque, u8 *data)
Definition: mc_socket.c:925
clib_error_t * mc_socket_main_init(mc_socket_main_t *msm, char **intfc_probe_list, int n_intfcs_to_probe)
Definition: mc_socket.c:973
static clib_error_t * from_relay_socket_read_ready(clib_file_t *uf)
Definition: mc_socket.c:300
svmdb_client_t * c
static clib_error_t * catchup_socket_read_ready(clib_file_t *uf, int is_server)
Definition: mc_socket.c:394
vlib_main_t * vm
Definition: buffer.c:294
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:339
static clib_error_t * tx_ack(void *transport, mc_peer_id_t dest_peer_id, u32 buffer_index)
Definition: mc_socket.c:142
static clib_error_t * to_relay_socket_read_ready(clib_file_t *uf)
Definition: mc_socket.c:266
u32 catchup_tcp_port
Definition: mc_socket.h:76
#define clib_memcpy(a, b, c)
Definition: string.h:75
elog_main_t elog_main
Definition: main.h:161
#define ELOG_TYPE(f, fmt)
Definition: elog.h:459
#define ELOG_TYPE_DECLARE(f)
Definition: elog.h:439
void mc_msg_user_request_handler(mc_main_t *mcm, mc_msg_user_request_t *mp, u32 buffer_index)
Definition: mc.c:1090
u32 max_packet_size
Definition: mc.h:306
uword(* catchup_request_fun)(void *opaque, u32 stream_index, mc_peer_id_t catchup_peer_id)
Definition: mc.h:292
Definition: mc.h:530
#define ASSERT(truth)
static clib_error_t * join_socket_read_ready(clib_file_t *uf)
Definition: mc_socket.c:320
static clib_error_t * catchup_server_read_ready(clib_file_t *uf)
Definition: mc_socket.c:444
void mc_msg_join_or_leave_request_handler(mc_main_t *mcm, mc_msg_join_or_leave_request_t *req, u32 buffer_index)
Definition: mc.c:914
static clib_error_t * catchup_socket_write_ready(clib_file_t *uf, int is_server)
Definition: mc_socket.c:464
static uword clib_file_add(clib_file_main_t *um, clib_file_t *template)
Definition: file.h:96
u32 next_buffer
Next buffer for this linked-list of buffers.
Definition: buffer.h:126
#define UNIX_FILE_DATA_AVAILABLE_TO_WRITE
Definition: file.h:57
static uword pointer_to_uword(const void *p)
Definition: types.h:131
mc_transport_type_t
Definition: mc.h:274
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
struct sockaddr_in tx_addr
Definition: mc_socket.h:27
u64 uword
Definition: types.h:112
u32 rx_mtu_n_buffers
Definition: mc_socket.h:64
#define clib_unix_warning(format, args...)
Definition: error.h:68
void(* catchup_send_fun)(void *opaque, uword catchup_opaque, u8 *data_vector)
Definition: mc.h:295
format_function_t * format_peer_id
Definition: mc.h:308
static clib_error_t * recvmsg_helper(mc_socket_main_t *msm, int socket, struct sockaddr_in *rx_addr, u32 *buffer_index, u32 drop_message)
Definition: mc_socket.c:160
u32 if_ip4_address_net_byte_order
Definition: mc_socket.h:73
typedef ip4_address
Definition: ip_types.api:17
clib_error_t *(* tx_buffer)(void *opaque, mc_transport_type_t type, u32 buffer_index)
Definition: mc.h:285
#define MC_EVENT_LOGGING
Definition: mc.h:27
clib_error_t *(* tx_ack)(void *opaque, mc_peer_id_t peer_id, u32 buffer_index)
Definition: mc.h:288
void mc_msg_catchup_request_handler(mc_main_t *mcm, mc_msg_catchup_request_t *req, u32 catchup_opaque)
Definition: mc.c:1494
#define clib_error_return_code(e, code, flags, args...)
Definition: error.h:93
u8 data[0]
Packet data.
Definition: buffer.h:172
uword private_data
Definition: file.h:64
u8 * format_network_address(u8 *s, va_list *args)
Definition: unix-formats.c:207
u32 multicast_tx_ip4_address_host_byte_order
Definition: mc_socket.h:83
Definition: file.h:51
static clib_error_t * catchup_client_write_ready(clib_file_t *uf)
Definition: mc_socket.c:547
static void vlib_buffer_free_one(vlib_main_t *vm, u32 buffer_index)
Free one buffer Shorthand to free a single buffer chain.
Definition: buffer_funcs.h:575
char * multicast_interface_name
Definition: mc_socket.h:79
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:111
static u32 vlib_buffer_alloc(vlib_main_t *vm, u32 *buffers, u32 n_buffers)
Allocate buffers into supplied array.
Definition: buffer_funcs.h:490
struct vlib_main_t * vlib_main
Definition: mc.h:584
static uword catchup_request_fun(void *transport_main, u32 stream_index, mc_peer_id_t catchup_peer_id)
Definition: mc_socket.c:843
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57
void( mc_msg_handler_t)(mc_main_t *mcm, void *msg, u32 buffer_index)
Definition: mc_socket.c:39
static mc_socket_catchup_t * find_catchup_from_file_descriptor(mc_socket_main_t *msm, int file_descriptor)
Definition: mc_socket.c:385
mc_transport_t transport
Definition: mc.h:545
static u32 mc_socket_peer_id_get_address(mc_peer_id_t i)
Definition: mc_socket.h:95
static void mc_byte_swap_msg_catchup_request(mc_msg_catchup_request_t *r)
Definition: mc.h:192
static clib_error_t * socket_setup(mc_socket_main_t *msm)
Definition: mc_socket.c:711