2 * mc_socket.c: socket based multicast for vlib mc
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:
9 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 #include <vlib/vlib.h>
19 #include <vlib/unix/mc_socket.h>
21 #include <sys/ioctl.h> /* for FIONBIO */
22 #include <netinet/tcp.h> /* for TCP_NODELAY */
23 #include <net/if.h> /* for struct ifreq */
26 format_socket_peer_id (u8 * s, va_list * args)
28 u64 peer_id_as_u64 = va_arg (*args, u64);
30 peer_id.as_u64 = peer_id_as_u64;
31 u32 a = mc_socket_peer_id_get_address (peer_id);
32 u32 p = mc_socket_peer_id_get_port (peer_id);
34 s = format (s, "%U:%04x", format_network_address, AF_INET, &a, ntohs (p));
39 typedef void (mc_msg_handler_t) (mc_main_t * mcm, void *msg,
43 msg_handler (mc_main_t * mcm,
44 u32 buffer_index, u32 handler_frees_buffer, void *_h)
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);
51 h (mcm, the_msg, buffer_index);
52 if (!handler_frees_buffer)
53 vlib_buffer_free_one (vm, buffer_index);
57 append_buffer_index_to_iovec (vlib_main_t * vm,
58 u32 buffer_index, struct iovec **iovs_return)
62 u32 bi = buffer_index;
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;
72 if (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))
81 sendmsg_helper (mc_socket_main_t * msm,
82 int socket, struct sockaddr_in *tx_addr, u32 buffer_index)
84 vlib_main_t *vm = msm->mc_main.vlib_main;
86 word n_bytes, n_bytes_tx, n_retries;
88 memset (&h, 0, sizeof (h));
90 h.msg_namelen = sizeof (tx_addr[0]);
93 _vec_len (msm->iovecs) = 0;
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);
100 h.msg_iov = msm->iovecs;
101 h.msg_iovlen = vec_len (msm->iovecs);
104 while ((n_bytes_tx = sendmsg (socket, &h, /* flags */ 0)) != n_bytes
107 if (n_bytes_tx != n_bytes)
109 clib_unix_warning ("sendmsg");
114 ELOG_TYPE_DECLARE (e) =
116 .format = "sendmsg-helper: %d retries",.format_args = "i4",};
122 ed = ELOG_DATA (&vm->elog_main, e);
123 ed->retries = n_retries;
128 static clib_error_t *
129 tx_buffer (void *transport, mc_transport_type_t type, u32 buffer_index)
131 mc_socket_main_t *msm = (mc_socket_main_t *) transport;
132 vlib_main_t *vm = msm->mc_main.vlib_main;
133 mc_multicast_socket_t *ms = &msm->multicast_sockets[type];
135 error = sendmsg_helper (msm, ms->socket, &ms->tx_addr, buffer_index);
136 if (type != MC_TRANSPORT_USER_REQUEST_TO_RELAY)
137 vlib_buffer_free_one (vm, buffer_index);
141 static clib_error_t *
142 tx_ack (void *transport, mc_peer_id_t dest_peer_id, u32 buffer_index)
144 struct sockaddr_in tx_addr;
145 mc_socket_main_t *msm = (mc_socket_main_t *) transport;
146 vlib_main_t *vm = msm->mc_main.vlib_main;
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);
154 error = sendmsg_helper (msm, msm->ack_socket, &tx_addr, buffer_index);
155 vlib_buffer_free_one (vm, buffer_index);
159 static clib_error_t *
160 recvmsg_helper (mc_socket_main_t * msm,
162 struct sockaddr_in *rx_addr,
163 u32 * buffer_index, u32 drop_message)
165 vlib_main_t *vm = msm->mc_main.vlib_main;
167 uword n_left, n_alloc, n_mtu, i, i_rx;
168 const uword buffer_size = VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES;
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);
176 uword max_alloc = 8 * n_mtu;
177 vec_validate (msm->rx_buffers, max_alloc - 1);
179 vlib_buffer_alloc (vm, msm->rx_buffers + n_left, max_alloc - n_left);
180 _vec_len (msm->rx_buffers) = n_left + n_alloc;
183 ASSERT (vec_len (msm->rx_buffers) >= n_mtu);
184 vec_validate (msm->iovecs, n_mtu - 1);
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++)
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;
195 _vec_len (msm->iovecs) = n_mtu;
200 memset (&h, 0, sizeof (h));
203 h.msg_name = rx_addr;
204 h.msg_namelen = sizeof (rx_addr[0]);
206 h.msg_iov = msm->iovecs;
207 h.msg_iovlen = vec_len (msm->iovecs);
209 n_bytes_left = recvmsg (socket, &h, 0);
210 if (n_bytes_left < 0)
211 return clib_error_return_unix (0, "recvmsg");
220 *buffer_index = msm->rx_buffers[i_rx];
223 b = vlib_get_buffer (vm, msm->rx_buffers[i_rx]);
228 n_bytes_left < buffer_size ? n_bytes_left : buffer_size;
230 n_bytes_left -= buffer_size;
232 if (n_bytes_left <= 0)
236 b->flags |= VLIB_BUFFER_NEXT_PRESENT;
237 b->next_buffer = msm->rx_buffers[i_rx];
240 _vec_len (msm->rx_buffers) = i_rx;
242 return 0 /* no error */ ;
245 static clib_error_t *
246 mastership_socket_read_ready (unix_file_t * uf)
248 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
249 mc_main_t *mcm = &msm->mc_main;
250 mc_multicast_socket_t *ms =
251 &msm->multicast_sockets[MC_TRANSPORT_MASTERSHIP];
255 error = recvmsg_helper (msm, ms->socket, /* rx_addr */ 0, &bi, /* drop_message */
258 msg_handler (mcm, bi,
259 /* handler_frees_buffer */ 0,
260 mc_msg_master_assert_handler);
265 static clib_error_t *
266 to_relay_socket_read_ready (unix_file_t * uf)
268 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
269 mc_main_t *mcm = &msm->mc_main;
270 vlib_main_t *vm = msm->mc_main.vlib_main;
271 mc_multicast_socket_t *ms_to_relay =
272 &msm->multicast_sockets[MC_TRANSPORT_USER_REQUEST_TO_RELAY];
273 mc_multicast_socket_t *ms_from_relay =
274 &msm->multicast_sockets[MC_TRANSPORT_USER_REQUEST_FROM_RELAY];
277 u32 is_master = mcm->relay_state == MC_RELAY_STATE_MASTER;
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);
283 /* If we are the master, number and rebroadcast the msg. */
284 if (!error && is_master)
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++;
291 sendmsg_helper (msm, ms_from_relay->socket, &ms_from_relay->tx_addr,
293 vlib_buffer_free_one (vm, bi);
299 static clib_error_t *
300 from_relay_socket_read_ready (unix_file_t * uf)
302 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
303 mc_main_t *mcm = &msm->mc_main;
304 mc_multicast_socket_t *ms =
305 &msm->multicast_sockets[MC_TRANSPORT_USER_REQUEST_FROM_RELAY];
309 error = recvmsg_helper (msm, ms->socket, /* rx_addr */ 0, &bi, /* drop_message */
313 msg_handler (mcm, bi, /* handler_frees_buffer */ 1,
314 mc_msg_user_request_handler);
319 static clib_error_t *
320 join_socket_read_ready (unix_file_t * uf)
322 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
323 mc_main_t *mcm = &msm->mc_main;
324 vlib_main_t *vm = mcm->vlib_main;
325 mc_multicast_socket_t *ms = &msm->multicast_sockets[MC_TRANSPORT_JOIN];
329 error = recvmsg_helper (msm, ms->socket, /* rx_addr */ 0, &bi, /* drop_message */
333 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
334 mc_msg_join_or_leave_request_t *mp = vlib_buffer_get_current (b);
336 switch (clib_host_to_net_u32 (mp->type))
338 case MC_MSG_TYPE_join_or_leave_request:
339 msg_handler (mcm, bi, /* handler_frees_buffer */ 0,
340 mc_msg_join_or_leave_request_handler);
343 case MC_MSG_TYPE_join_reply:
344 msg_handler (mcm, bi, /* handler_frees_buffer */ 0,
345 mc_msg_join_reply_handler);
356 static clib_error_t *
357 ack_socket_read_ready (unix_file_t * uf)
359 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
360 mc_main_t *mcm = &msm->mc_main;
364 error = recvmsg_helper (msm, msm->ack_socket, /* rx_addr */ 0, &bi,
365 /* drop_message */ 0);
367 msg_handler (mcm, bi, /* handler_frees_buffer */ 0,
368 mc_msg_user_ack_handler);
373 catchup_cleanup (mc_socket_main_t * msm,
374 mc_socket_catchup_t * c, unix_main_t * um, unix_file_t * uf)
376 hash_unset (msm->catchup_index_by_file_descriptor, uf->file_descriptor);
377 unix_file_del (um, uf);
378 vec_free (c->input_vector);
379 vec_free (c->output_vector);
380 pool_put (msm->catchups, c);
383 static mc_socket_catchup_t *
384 find_catchup_from_file_descriptor (mc_socket_main_t * msm,
388 hash_get (msm->catchup_index_by_file_descriptor, file_descriptor);
389 return p ? pool_elt_at_index (msm->catchups, p[0]) : 0;
392 static clib_error_t *
393 catchup_socket_read_ready (unix_file_t * uf, int is_server)
395 unix_main_t *um = &unix_main;
396 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
397 mc_main_t *mcm = &msm->mc_main;
398 mc_socket_catchup_t *c =
399 find_catchup_from_file_descriptor (msm, uf->file_descriptor);
402 l = vec_len (c->input_vector);
403 vec_resize (c->input_vector, 4096);
405 read (uf->file_descriptor, c->input_vector + l,
406 vec_len (c->input_vector) - l);
415 catchup_cleanup (msm, c, um, uf);
416 return clib_error_return_unix (0, "read");
420 _vec_len (c->input_vector) = l + n;
422 if (is_eof && vec_len (c->input_vector) > 0)
426 mc_msg_catchup_request_handler (mcm, (void *) c->input_vector,
428 _vec_len (c->input_vector) = 0;
432 mc_msg_catchup_reply_handler (mcm, (void *) c->input_vector,
434 c->input_vector = 0; /* reply handler is responsible for freeing vector */
435 catchup_cleanup (msm, c, um, uf);
439 return 0 /* no error */ ;
442 static clib_error_t *
443 catchup_server_read_ready (unix_file_t * uf)
445 return catchup_socket_read_ready (uf, /* is_server */ 1);
448 static clib_error_t *
449 catchup_client_read_ready (unix_file_t * uf)
451 if (MC_EVENT_LOGGING)
453 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
454 vlib_main_t *vm = msm->mc_main.vlib_main;
456 ELOG_TYPE (e, "catchup_client_read_ready");
457 ELOG (&vm->elog_main, e, 0);
459 return catchup_socket_read_ready (uf, /* is_server */ 0);
462 static clib_error_t *
463 catchup_socket_write_ready (unix_file_t * uf, int is_server)
465 unix_main_t *um = &unix_main;
466 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
467 mc_socket_catchup_t *c =
468 find_catchup_from_file_descriptor (msm, uf->file_descriptor);
469 clib_error_t *error = 0;
472 if (c->connect_in_progress)
476 c->connect_in_progress = 0;
477 len = sizeof (value);
478 if (getsockopt (c->socket, SOL_SOCKET, SO_ERROR, &value, &len) < 0)
480 error = clib_error_return_unix (0, "getsockopt SO_ERROR");
486 clib_error_return_code (0, value, CLIB_ERROR_ERRNO_VALID,
497 clib_min (vec_len (c->output_vector) - c->output_vector_n_written,
498 msm->rx_mtu_n_bytes -
499 64 /* ip + tcp + option allowance */ );
501 if (n_this_write <= 0)
506 n = write (uf->file_descriptor,
507 c->output_vector + c->output_vector_n_written,
510 while (n < 0 && errno == EAGAIN);
514 error = clib_error_return_unix (0, "write");
517 c->output_vector_n_written += n;
520 if (c->output_vector_n_written >= vec_len (c->output_vector))
524 uf->flags &= ~UNIX_FILE_DATA_AVAILABLE_TO_WRITE;
525 unix_main.file_update (uf, UNIX_FILE_UPDATE_MODIFY);
526 /* Send EOF to other side. */
527 shutdown (uf->file_descriptor, SHUT_WR);
533 catchup_cleanup (msm, c, um, uf);
539 static clib_error_t *
540 catchup_server_write_ready (unix_file_t * uf)
542 return catchup_socket_write_ready (uf, /* is_server */ 1);
545 static clib_error_t *
546 catchup_client_write_ready (unix_file_t * uf)
548 return catchup_socket_write_ready (uf, /* is_server */ 0);
551 static clib_error_t *
552 catchup_socket_error_ready (unix_file_t * uf)
554 unix_main_t *um = &unix_main;
555 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
556 mc_socket_catchup_t *c =
557 find_catchup_from_file_descriptor (msm, uf->file_descriptor);
558 catchup_cleanup (msm, c, um, uf);
559 return clib_error_return (0, "error");
562 static clib_error_t *
563 catchup_listen_read_ready (unix_file_t * uf)
565 mc_socket_main_t *msm = (mc_socket_main_t *) uf->private_data;
566 struct sockaddr_in client_addr;
568 mc_socket_catchup_t *c;
569 unix_file_t template = { 0 };
571 pool_get (msm->catchups, c);
572 memset (c, 0, sizeof (c[0]));
574 client_len = sizeof (client_addr);
576 /* Acquires the non-blocking attrib from the server socket. */
577 c->socket = accept (uf->file_descriptor,
578 (struct sockaddr *) &client_addr,
579 (socklen_t *) & client_len);
583 pool_put (msm->catchups, c);
584 return clib_error_return_unix (0, "accept");
587 if (MC_EVENT_LOGGING)
589 mc_main_t *mcm = &msm->mc_main;
590 vlib_main_t *vm = mcm->vlib_main;
592 ELOG_TYPE_DECLARE (e) =
594 .format = "catchup accepted from 0x%lx",.format_args = "i4",};
600 ed = ELOG_DATA (&vm->elog_main, e);
601 ed->addr = ntohl (client_addr.sin_addr.s_addr);
604 /* Disable the Nagle algorithm, ship catchup pkts immediately */
607 if ((setsockopt (c->socket, IPPROTO_TCP,
608 TCP_NODELAY, (void *) &one, sizeof (one))) < 0)
610 clib_unix_warning ("catchup socket: set TCP_NODELAY");
614 template.read_function = catchup_server_read_ready;
615 template.write_function = catchup_server_write_ready;
616 template.error_function = catchup_socket_error_ready;
617 template.file_descriptor = c->socket;
618 template.private_data = pointer_to_uword (msm);
619 c->unix_file_index = unix_file_add (&unix_main, &template);
620 hash_set (msm->catchup_index_by_file_descriptor, c->socket,
626 /* Return and bind to an unused port. */
628 find_and_bind_to_free_port (word sock, word port)
630 for (; port < 1 << 16; port++)
632 struct sockaddr_in a;
634 memset (&a, 0, sizeof (a)); /* Warnings be gone */
636 a.sin_family = PF_INET;
637 a.sin_addr.s_addr = INADDR_ANY;
638 a.sin_port = htons (port);
640 if (bind (sock, (struct sockaddr *) &a, sizeof (a)) >= 0)
644 return port < 1 << 16 ? port : -1;
647 static clib_error_t *
648 setup_mutlicast_socket (mc_socket_main_t * msm,
649 mc_multicast_socket_t * ms,
650 char *type, uword udp_port)
653 struct ip_mreq mcast_req;
655 if (!msm->multicast_ttl)
656 msm->multicast_ttl = 1;
658 /* mastership (multicast) TX socket */
659 if ((ms->socket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
660 return clib_error_return_unix (0, "%s socket", type);
663 u8 ttl = msm->multicast_ttl;
665 if ((setsockopt (ms->socket, IPPROTO_IP,
666 IP_MULTICAST_TTL, (void *) &ttl, sizeof (ttl))) < 0)
667 return clib_error_return_unix (0, "%s set multicast ttl", type);
670 if (setsockopt (ms->socket, SOL_SOCKET, SO_REUSEADDR, &one, sizeof (one)) <
672 return clib_error_return_unix (0, "%s setsockopt SO_REUSEADDR", type);
674 memset (&ms->tx_addr, 0, sizeof (ms->tx_addr));
675 ms->tx_addr.sin_family = AF_INET;
676 ms->tx_addr.sin_addr.s_addr =
677 htonl (msm->multicast_tx_ip4_address_host_byte_order);
678 ms->tx_addr.sin_port = htons (udp_port);
680 if (bind (ms->socket, (struct sockaddr *) &ms->tx_addr,
681 sizeof (ms->tx_addr)) < 0)
682 return clib_error_return_unix (0, "%s bind", type);
684 memset (&mcast_req, 0, sizeof (mcast_req));
685 mcast_req.imr_multiaddr.s_addr =
686 htonl (msm->multicast_tx_ip4_address_host_byte_order);
687 mcast_req.imr_interface.s_addr = msm->if_ip4_address_net_byte_order;
689 if ((setsockopt (ms->socket, IPPROTO_IP,
690 IP_ADD_MEMBERSHIP, (void *) &mcast_req,
691 sizeof (mcast_req))) < 0)
692 return clib_error_return_unix (0, "%s IP_ADD_MEMBERSHIP setsockopt",
695 if (ioctl (ms->socket, FIONBIO, &one) < 0)
696 return clib_error_return_unix (0, "%s set FIONBIO", type);
698 /* FIXME remove this when we support tx_ready. */
701 socklen_t sl = sizeof (len);
702 if (setsockopt (ms->socket, SOL_SOCKET, SO_SNDBUF, &len, sl) < 0)
703 clib_unix_error ("setsockopt");
709 static clib_error_t *
710 socket_setup (mc_socket_main_t * msm)
716 if (!msm->base_multicast_udp_port_host_byte_order)
717 msm->base_multicast_udp_port_host_byte_order =
718 0xffff - ((MC_N_TRANSPORT_TYPE + 2 /* ack socket, catchup socket */ )
721 port = msm->base_multicast_udp_port_host_byte_order;
723 error = setup_mutlicast_socket (msm,
724 &msm->multicast_sockets
725 [MC_TRANSPORT_MASTERSHIP], "mastership",
730 error = setup_mutlicast_socket (msm,
731 &msm->multicast_sockets[MC_TRANSPORT_JOIN],
736 error = setup_mutlicast_socket (msm,
737 &msm->multicast_sockets
738 [MC_TRANSPORT_USER_REQUEST_TO_RELAY],
743 error = setup_mutlicast_socket (msm,
744 &msm->multicast_sockets
745 [MC_TRANSPORT_USER_REQUEST_FROM_RELAY],
746 "from relay", port++);
751 msm->ack_socket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
752 if (msm->ack_socket < 0)
753 return clib_error_return_unix (0, "ack socket");
755 msm->ack_udp_port = find_and_bind_to_free_port (msm->ack_socket, port++);
757 if (ioctl (msm->ack_socket, FIONBIO, &one) < 0)
758 return clib_error_return_unix (0, "ack socket FIONBIO");
760 msm->catchup_server_socket = socket (AF_INET, SOCK_STREAM, 0);
761 if (msm->catchup_server_socket < 0)
762 return clib_error_return_unix (0, "catchup server socket");
764 msm->catchup_tcp_port =
765 find_and_bind_to_free_port (msm->catchup_server_socket, port++);
767 if (ioctl (msm->catchup_server_socket, FIONBIO, &one) < 0)
768 return clib_error_return_unix (0, "catchup server socket FIONBIO");
770 if (listen (msm->catchup_server_socket, 5) < 0)
771 return clib_error_return_unix (0, "catchup server socket listen");
773 /* epoll setup for multicast mastership socket */
775 unix_file_t template = { 0 };
777 template.read_function = mastership_socket_read_ready;
778 template.file_descriptor =
779 msm->multicast_sockets[MC_TRANSPORT_MASTERSHIP].socket;
780 template.private_data = (uword) msm;
781 unix_file_add (&unix_main, &template);
783 /* epoll setup for multicast to_relay socket */
784 template.read_function = to_relay_socket_read_ready;
785 template.file_descriptor =
786 msm->multicast_sockets[MC_TRANSPORT_USER_REQUEST_TO_RELAY].socket;
787 template.private_data = (uword) msm;
788 unix_file_add (&unix_main, &template);
790 /* epoll setup for multicast from_relay socket */
791 template.read_function = from_relay_socket_read_ready;
792 template.file_descriptor =
793 msm->multicast_sockets[MC_TRANSPORT_USER_REQUEST_FROM_RELAY].socket;
794 template.private_data = (uword) msm;
795 unix_file_add (&unix_main, &template);
797 template.read_function = join_socket_read_ready;
798 template.file_descriptor =
799 msm->multicast_sockets[MC_TRANSPORT_JOIN].socket;
800 template.private_data = (uword) msm;
801 unix_file_add (&unix_main, &template);
803 /* epoll setup for ack rx socket */
804 template.read_function = ack_socket_read_ready;
805 template.file_descriptor = msm->ack_socket;
806 template.private_data = (uword) msm;
807 unix_file_add (&unix_main, &template);
809 /* epoll setup for TCP catchup server */
810 template.read_function = catchup_listen_read_ready;
811 template.file_descriptor = msm->catchup_server_socket;
812 template.private_data = (uword) msm;
813 unix_file_add (&unix_main, &template);
820 catchup_add_pending_output (mc_socket_catchup_t * c, uword n_bytes,
821 u8 * set_output_vector)
823 unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
827 if (set_output_vector)
828 c->output_vector = set_output_vector;
830 vec_add2 (c->output_vector, result, n_bytes);
831 if (vec_len (c->output_vector) > 0)
833 int skip_update = 0 != (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE);
834 uf->flags |= UNIX_FILE_DATA_AVAILABLE_TO_WRITE;
836 unix_main.file_update (uf, UNIX_FILE_UPDATE_MODIFY);
842 catchup_request_fun (void *transport_main,
843 u32 stream_index, mc_peer_id_t catchup_peer_id)
845 mc_socket_main_t *msm = (mc_socket_main_t *) transport_main;
846 mc_main_t *mcm = &msm->mc_main;
847 vlib_main_t *vm = mcm->vlib_main;
848 mc_socket_catchup_t *c;
849 struct sockaddr_in addr;
850 unix_main_t *um = &unix_main;
853 pool_get (msm->catchups, c);
854 memset (c, 0, sizeof (*c));
856 c->socket = socket (AF_INET, SOCK_STREAM, 0);
859 clib_unix_warning ("socket");
863 if (ioctl (c->socket, FIONBIO, &one) < 0)
865 clib_unix_warning ("FIONBIO");
869 memset (&addr, 0, sizeof (addr));
870 addr.sin_family = AF_INET;
871 addr.sin_addr.s_addr = mc_socket_peer_id_get_address (catchup_peer_id);
872 addr.sin_port = mc_socket_peer_id_get_port (catchup_peer_id);
874 c->connect_in_progress = 1;
876 if (MC_EVENT_LOGGING)
878 ELOG_TYPE_DECLARE (e) =
880 .format = "connecting to peer 0x%Lx",.format_args = "i8",};
885 ed = ELOG_DATA (&vm->elog_main, e);
886 ed->peer = catchup_peer_id.as_u64;
889 if (connect (c->socket, (const void *) &addr, sizeof (addr))
890 < 0 && errno != EINPROGRESS)
892 clib_unix_warning ("connect to %U fails",
893 format_socket_peer_id, catchup_peer_id);
898 unix_file_t template = { 0 };
900 template.read_function = catchup_client_read_ready;
901 template.write_function = catchup_client_write_ready;
902 template.error_function = catchup_socket_error_ready;
903 template.file_descriptor = c->socket;
904 template.private_data = (uword) msm;
905 c->unix_file_index = unix_file_add (um, &template);
907 hash_set (msm->catchup_index_by_file_descriptor, c->socket,
912 mc_msg_catchup_request_t *mp;
913 mp = catchup_add_pending_output (c, sizeof (mp[0]), /* set_output_vector */
915 mp->peer_id = msm->mc_main.transport.our_catchup_peer_id;
916 mp->stream_index = stream_index;
917 mc_byte_swap_msg_catchup_request (mp);
920 return c - msm->catchups;
924 catchup_send_fun (void *transport_main, uword opaque, u8 * data)
926 mc_socket_main_t *msm = (mc_socket_main_t *) transport_main;
927 mc_socket_catchup_t *c = pool_elt_at_index (msm->catchups, opaque);
928 catchup_add_pending_output (c, 0, data);
932 find_interface_ip4_address (char *if_name, u32 * ip4_address, u32 * mtu)
936 struct sockaddr_in *sa;
938 /* Dig up our IP address */
939 fd = socket (PF_INET, AF_INET, 0);
942 clib_unix_error ("socket");
946 ifr.ifr_addr.sa_family = AF_INET;
947 strncpy (ifr.ifr_name, if_name, sizeof (ifr.ifr_name) - 1);
948 if (ioctl (fd, SIOCGIFADDR, &ifr) < 0)
950 clib_unix_error ("ioctl(SIOCFIGADDR)");
955 sa = (void *) &ifr.ifr_addr;
956 clib_memcpy (ip4_address, &sa->sin_addr.s_addr, sizeof (ip4_address[0]));
958 if (ioctl (fd, SIOCGIFMTU, &ifr) < 0)
964 *mtu = ifr.ifr_mtu - ( /* IP4 header */ 20 + /* UDP header */ 8);
972 mc_socket_main_init (mc_socket_main_t * msm, char **intfc_probe_list,
973 int n_intfcs_to_probe)
982 if (!msm->multicast_tx_ip4_address_host_byte_order)
983 msm->multicast_tx_ip4_address_host_byte_order = 0xefff0007;
989 if (msm->multicast_interface_name)
992 !find_interface_ip4_address (msm->multicast_interface_name, &a,
997 for (i = 0; i < n_intfcs_to_probe; i++)
998 if (!find_interface_ip4_address (intfc_probe_list[i], &a, &mtu))
1001 msm->multicast_interface_name = intfc_probe_list[i];
1007 return clib_error_return (0, "can't find interface ip4 address");
1009 msm->if_ip4_address_net_byte_order = a;
1012 msm->rx_mtu_n_bytes = mtu;
1013 msm->rx_mtu_n_buffers =
1014 msm->rx_mtu_n_bytes / VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES;
1015 msm->rx_mtu_n_buffers +=
1016 (msm->rx_mtu_n_bytes % VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES) != 0;
1018 error = socket_setup (msm);
1022 mcm->transport.our_ack_peer_id =
1023 mc_socket_set_peer_id (msm->if_ip4_address_net_byte_order,
1026 mcm->transport.our_catchup_peer_id =
1027 mc_socket_set_peer_id (msm->if_ip4_address_net_byte_order,
1028 msm->catchup_tcp_port);
1030 mcm->transport.tx_buffer = tx_buffer;
1031 mcm->transport.tx_ack = tx_ack;
1032 mcm->transport.catchup_request_fun = catchup_request_fun;
1033 mcm->transport.catchup_send_fun = catchup_send_fun;
1034 mcm->transport.format_peer_id = format_socket_peer_id;
1035 mcm->transport.opaque = msm;
1036 mcm->transport.max_packet_size = mtu;
1038 mc_main_init (mcm, "socket");
1044 * fd.io coding-style-patch-verification: ON
1047 * eval: (c-set-style "gnu")