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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 * @brief Local TCP/IP stack punt infrastructure.
20 * Provides a set of VPP nodes together with the relevant APIs and CLI
21 * commands in order to adjust and dispatch packets from the VPP data plane
22 * to the local TCP/IP stack
25 #include <vnet/ip/ip.h>
26 #include <vlib/vlib.h>
27 #include <vnet/pg/pg.h>
28 #include <vnet/udp/udp.h>
29 #include <vnet/tcp/tcp.h>
30 #include <vnet/ip/punt.h>
31 #include <vppinfra/sparse_vec.h>
32 #include <vlib/unix/unix.h>
36 #include <sys/socket.h>
42 #define foreach_punt_next \
43 _ (PUNT, "error-punt")
47 #define _(s,n) PUNT_NEXT_##s,
53 enum punt_socket_rx_next_e
55 PUNT_SOCKET_RX_NEXT_INTERFACE_OUTPUT,
56 PUNT_SOCKET_RX_NEXT_IP4_LOOKUP,
57 PUNT_SOCKET_RX_NEXT_IP6_LOOKUP,
61 vlib_node_registration_t udp4_punt_node;
62 vlib_node_registration_t udp6_punt_node;
63 vlib_node_registration_t udp4_punt_socket_node;
64 vlib_node_registration_t udp6_punt_socket_node;
65 static vlib_node_registration_t punt_socket_rx_node;
67 punt_main_t punt_main;
70 vnet_punt_get_server_pathname (void)
72 punt_main_t *pm = &punt_main;
76 /** @brief IPv4/IPv6 UDP punt node main loop.
78 This is the main loop inline function for IPv4/IPv6 UDP punt
81 @param vm vlib_main_t corresponding to the current thread
82 @param node vlib_node_runtime_t
83 @param frame vlib_frame_t whose contents should be dispatched
84 @param is_ipv4 indicates if called for IPv4 or IPv6 node
87 udp46_punt_inline (vlib_main_t * vm,
88 vlib_node_runtime_t * node,
89 vlib_frame_t * from_frame, int is_ip4)
91 u32 n_left_from, *from, *to_next;
94 from = vlib_frame_vector_args (from_frame);
95 n_left_from = from_frame->n_vectors;
97 /* udp[46]_lookup hands us the data payload, not the IP header */
99 advance = -(sizeof (ip4_header_t) + sizeof (udp_header_t));
101 advance = -(sizeof (ip6_header_t) + sizeof (udp_header_t));
103 while (n_left_from > 0)
107 vlib_get_next_frame (vm, node, PUNT_NEXT_PUNT, to_next, n_left_to_next);
109 while (n_left_from > 0 && n_left_to_next > 0)
121 b0 = vlib_get_buffer (vm, bi0);
122 vlib_buffer_advance (b0, advance);
123 b0->error = node->errors[PUNT_ERROR_UDP_PORT];
126 vlib_put_next_frame (vm, node, PUNT_NEXT_PUNT, n_left_to_next);
129 return from_frame->n_vectors;
132 static char *punt_error_strings[] = {
133 #define punt_error(n,s) s,
134 #include "punt_error.def"
138 /** @brief IPv4 UDP punt node.
141 This is the IPv4 UDP punt transition node. It is registered as a next
142 node for the "ip4-udp-lookup" handling UDP port(s) requested for punt.
143 The buffer's current data pointer is adjusted to the original packet
144 IPv4 header. All buffers are dispatched to "error-punt".
146 @param vm vlib_main_t corresponding to the current thread
147 @param node vlib_node_runtime_t
148 @param frame vlib_frame_t whose contents should be dispatched
150 @par Graph mechanics: next index usage
153 - <code>vnet_buffer(b)->current_data</code>
154 - <code>vnet_buffer(b)->current_len</code>
157 - Dispatches the packet to the "error-punt" node
160 udp4_punt (vlib_main_t * vm,
161 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
163 return udp46_punt_inline (vm, node, from_frame, 1 /* is_ip4 */ );
166 /** @brief IPv6 UDP punt node.
169 This is the IPv6 UDP punt transition node. It is registered as a next
170 node for the "ip6-udp-lookup" handling UDP port(s) requested for punt.
171 The buffer's current data pointer is adjusted to the original packet
172 IPv6 header. All buffers are dispatched to "error-punt".
174 @param vm vlib_main_t corresponding to the current thread
175 @param node vlib_node_runtime_t
176 @param frame vlib_frame_t whose contents should be dispatched
178 @par Graph mechanics: next index usage
181 - <code>vnet_buffer(b)->current_data</code>
182 - <code>vnet_buffer(b)->current_len</code>
185 - Dispatches the packet to the "error-punt" node
188 udp6_punt (vlib_main_t * vm,
189 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
191 return udp46_punt_inline (vm, node, from_frame, 0 /* is_ip4 */ );
195 VLIB_REGISTER_NODE (udp4_punt_node) = {
196 .function = udp4_punt,
197 .name = "ip4-udp-punt",
198 /* Takes a vector of packets. */
199 .vector_size = sizeof (u32),
201 .n_errors = PUNT_N_ERROR,
202 .error_strings = punt_error_strings,
204 .n_next_nodes = PUNT_N_NEXT,
206 #define _(s,n) [PUNT_NEXT_##s] = n,
212 VLIB_NODE_FUNCTION_MULTIARCH (udp4_punt_node, udp4_punt);
214 VLIB_REGISTER_NODE (udp6_punt_node) = {
215 .function = udp6_punt,
216 .name = "ip6-udp-punt",
217 /* Takes a vector of packets. */
218 .vector_size = sizeof (u32),
220 .n_errors = PUNT_N_ERROR,
221 .error_strings = punt_error_strings,
223 .n_next_nodes = PUNT_N_NEXT,
225 #define _(s,n) [PUNT_NEXT_##s] = n,
231 VLIB_NODE_FUNCTION_MULTIARCH (udp6_punt_node, udp6_punt);;
235 static punt_client_t *
236 punt_client_get (bool is_ip4, u16 port)
238 punt_main_t *pm = &punt_main;
240 is_ip4 ? pm->clients_by_dst_port4 : pm->clients_by_dst_port6;
242 u16 i = sparse_vec_index (v, port);
243 if (i == SPARSE_VEC_INVALID_INDEX)
246 return &vec_elt (v, i);
249 static struct sockaddr_un *
250 punt_socket_get (bool is_ip4, u16 port)
252 punt_client_t *v = punt_client_get (is_ip4, port);
260 punt_socket_register (bool is_ip4, u8 protocol, u16 port,
261 char *client_pathname)
263 punt_main_t *pm = &punt_main;
265 punt_client_t *v = is_ip4 ? pm->clients_by_dst_port4 :
266 pm->clients_by_dst_port6;
268 memset (&c, 0, sizeof (c));
269 memcpy (c.caddr.sun_path, client_pathname, sizeof (c.caddr.sun_path));
270 c.caddr.sun_family = AF_UNIX;
272 n = sparse_vec_validate (v, port);
276 /* $$$$ Just leaves the mapping in place for now */
278 punt_socket_unregister (bool is_ip4, u8 protocol, u16 port)
285 punt_client_t client;
290 format_udp_punt_trace (u8 * s, va_list * args)
292 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
293 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
294 udp_punt_trace_t *t = va_arg (*args, udp_punt_trace_t *);
295 u32 indent = format_get_indent (s);
296 s = format (s, "to: %s", t->client.caddr.sun_path);
299 s = format (s, "\n%U(buffer is part of chain)", format_white_space,
306 udp46_punt_socket_inline (vlib_main_t * vm,
307 vlib_node_runtime_t * node,
308 vlib_frame_t * frame, bool is_ip4)
310 u32 *buffers = vlib_frame_args (frame);
311 uword n_packets = frame->n_vectors;
312 struct iovec *iovecs = 0;
313 punt_main_t *pm = &punt_main;
316 u32 node_index = is_ip4 ? udp4_punt_socket_node.index :
317 udp6_punt_socket_node.index;
319 for (i = 0; i < n_packets; i++)
324 punt_packetdesc_t packetdesc;
326 b = vlib_get_buffer (vm, buffers[i]);
328 /* Reverse UDP Punt advance */
332 vlib_buffer_advance (b, -(sizeof (ip4_header_t) +
333 sizeof (udp_header_t)));
334 ip4_header_t *ip = vlib_buffer_get_current (b);
335 udp = (udp_header_t *) (ip + 1);
339 vlib_buffer_advance (b, -(sizeof (ip6_header_t) +
340 sizeof (udp_header_t)));
341 ip6_header_t *ip = vlib_buffer_get_current (b);
342 udp = (udp_header_t *) (ip + 1);
345 u16 port = clib_net_to_host_u16 (udp->dst_port);
348 * Find registerered client
349 * If no registered client, drop packet and count
351 struct sockaddr_un *caddr;
352 caddr = punt_socket_get (is_ip4, port);
355 vlib_node_increment_counter (vm, node_index,
356 PUNT_ERROR_SOCKET_TX_ERROR, 1);
360 punt_client_t *c = NULL;
361 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
365 c = punt_client_get (is_ip4, port);
368 t = vlib_add_trace (vm, node, b, sizeof (t[0]));
369 clib_memcpy (&t->client, c, sizeof (t->client));
372 /* Re-set iovecs if present. */
374 _vec_len (iovecs) = 0;
376 /* Add packet descriptor */
377 packetdesc.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
378 packetdesc.action = 0;
379 vec_add2 (iovecs, iov, 1);
380 iov->iov_base = &packetdesc;
381 iov->iov_len = sizeof (packetdesc);
383 /** VLIB buffer chain -> Unix iovec(s). */
384 vlib_buffer_advance (b, -(sizeof (ethernet_header_t)));
385 vec_add2 (iovecs, iov, 1);
386 iov->iov_base = b->data + b->current_data;
387 iov->iov_len = l = b->current_length;
389 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_NEXT_PRESENT))
393 b = vlib_get_buffer (vm, b->next_buffer);
394 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
397 t = vlib_add_trace (vm, node, b, sizeof (t[0]));
398 clib_memcpy (&t->client, c, sizeof (t->client));
402 vec_add2 (iovecs, iov, 1);
404 iov->iov_base = b->data + b->current_data;
405 iov->iov_len = b->current_length;
406 l += b->current_length;
408 while (b->flags & VLIB_BUFFER_NEXT_PRESENT);
411 struct msghdr msg = {
413 .msg_namelen = sizeof (*caddr),
415 .msg_iovlen = vec_len (iovecs),
418 if (sendmsg (pm->socket_fd, &msg, 0) < (ssize_t) l)
419 vlib_node_increment_counter (vm, node_index,
420 PUNT_ERROR_SOCKET_TX_ERROR, 1);
424 vlib_buffer_free (vm, buffers, n_packets);
430 udp4_punt_socket (vlib_main_t * vm,
431 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
433 return udp46_punt_socket_inline (vm, node, from_frame, true /* is_ip4 */ );
437 udp6_punt_socket (vlib_main_t * vm,
438 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
440 return udp46_punt_socket_inline (vm, node, from_frame, false /* is_ip4 */ );
445 VLIB_REGISTER_NODE (udp4_punt_socket_node) = {
446 .function = udp4_punt_socket,
447 .name = "ip4-udp-punt-socket",
448 .format_trace = format_udp_punt_trace,
449 .flags = VLIB_NODE_FLAG_IS_DROP,
450 /* Takes a vector of packets. */
451 .vector_size = sizeof (u32),
452 .n_errors = PUNT_N_ERROR,
453 .error_strings = punt_error_strings,
455 VLIB_REGISTER_NODE (udp6_punt_socket_node) = {
456 .function = udp6_punt_socket,
457 .name = "ip6-udp-punt-socket",
458 .format_trace = format_udp_punt_trace,
459 .flags = VLIB_NODE_FLAG_IS_DROP,
460 .vector_size = sizeof (u32),
461 .n_errors = PUNT_N_ERROR,
462 .error_strings = punt_error_strings,
468 enum punt_action_e action;
473 format_punt_trace (u8 * s, va_list * va)
475 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
476 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
477 vnet_main_t *vnm = vnet_get_main ();
478 punt_trace_t *t = va_arg (*va, punt_trace_t *);
479 s = format (s, "%U Action: %d", format_vnet_sw_if_index_name,
480 vnm, t->sw_if_index, t->action);
485 punt_socket_rx_fd (vlib_main_t * vm, vlib_node_runtime_t * node, u32 fd)
487 const uword buffer_size = VLIB_BUFFER_DATA_SIZE;
488 u32 n_trace = vlib_get_trace_count (vm, node);
489 u32 next = node->cached_next_index;
490 u32 n_left_to_next, next_index;
492 u32 error = PUNT_ERROR_NONE;
493 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
495 /* $$$$ Only dealing with one buffer at the time for now */
499 punt_packetdesc_t packetdesc;
503 if (vlib_buffer_alloc (vm, &bi, 1) != 1)
505 error = PUNT_ERROR_NOBUFFER;
509 b = vlib_get_buffer (vm, bi);
510 io[0].iov_base = &packetdesc;
511 io[0].iov_len = sizeof (packetdesc);
512 io[1].iov_base = b->data;
513 io[1].iov_len = buffer_size;
515 size = readv (fd, io, 2);
516 /* We need at least the packet descriptor plus a header */
517 if (size <= (int) (sizeof (packetdesc) + sizeof (ip4_header_t)))
519 vlib_buffer_free (vm, &bi, 1);
520 error = PUNT_ERROR_READV;
524 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
525 b->current_length = size - sizeof (packetdesc);
527 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b);
529 switch (packetdesc.action)
532 vnet_buffer (b)->sw_if_index[VLIB_TX] = packetdesc.sw_if_index;
533 next_index = PUNT_SOCKET_RX_NEXT_INTERFACE_OUTPUT;
536 case PUNT_IP4_ROUTED:
537 vnet_buffer (b)->sw_if_index[VLIB_RX] = packetdesc.sw_if_index;
538 vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0;
539 next_index = PUNT_SOCKET_RX_NEXT_IP4_LOOKUP;
542 case PUNT_IP6_ROUTED:
543 vnet_buffer (b)->sw_if_index[VLIB_RX] = packetdesc.sw_if_index;
544 vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0;
545 next_index = PUNT_SOCKET_RX_NEXT_IP6_LOOKUP;
549 error = PUNT_ERROR_ACTION;
550 vlib_buffer_free (vm, &bi, 1);
554 if (PREDICT_FALSE (n_trace > 0))
557 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
558 vlib_set_trace_count (vm, node, --n_trace);
559 t = vlib_add_trace (vm, node, b, sizeof (*t));
560 t->sw_if_index = packetdesc.sw_if_index;
561 t->action = packetdesc.action;
568 vlib_validate_buffer_enqueue_x1 (vm, node, next, to_next, n_left_to_next,
570 vlib_put_next_frame (vm, node, next, n_left_to_next);
574 vlib_node_increment_counter (vm, punt_socket_rx_node.index, error, 1);
579 punt_socket_rx (vlib_main_t * vm,
580 vlib_node_runtime_t * node, vlib_frame_t * frame)
582 punt_main_t *pm = &punt_main;
586 for (i = 0; i < vec_len (pm->ready_fds); i++)
588 total_count += punt_socket_rx_fd (vm, node, pm->ready_fds[i]);
589 vec_del1 (pm->ready_fds, i);
594 VLIB_REGISTER_NODE (punt_socket_rx_node, static) =
596 .function = punt_socket_rx,.name = "punt-socket-rx",.type =
597 VLIB_NODE_TYPE_INPUT,.state = VLIB_NODE_STATE_INTERRUPT,.vector_size =
598 1,.n_errors = PUNT_N_ERROR,.error_strings =
599 punt_error_strings,.n_next_nodes = PUNT_SOCKET_RX_N_NEXT,.next_nodes =
601 [PUNT_SOCKET_RX_NEXT_INTERFACE_OUTPUT] = "interface-output",
602 [PUNT_SOCKET_RX_NEXT_IP4_LOOKUP] = "ip4-lookup",
603 [PUNT_SOCKET_RX_NEXT_IP6_LOOKUP] = "ip6-lookup",},.format_trace =
606 static clib_error_t *
607 punt_socket_read_ready (clib_file_t * uf)
609 vlib_main_t *vm = vlib_get_main ();
610 punt_main_t *pm = &punt_main;
612 /** Schedule the rx node */
613 vlib_node_set_interrupt_pending (vm, punt_socket_rx_node.index);
614 vec_add1 (pm->ready_fds, uf->file_descriptor);
620 vnet_punt_socket_add (vlib_main_t * vm, u32 header_version,
621 bool is_ip4, u8 protocol, u16 port,
622 char *client_pathname)
624 punt_main_t *pm = &punt_main;
626 if (!pm->is_configured)
627 return clib_error_return (0, "socket is not configured");
629 if (header_version != PUNT_PACKETDESC_VERSION)
630 return clib_error_return (0, "Invalid packet descriptor version");
632 /* For now we only support UDP punt */
633 if (protocol != IP_PROTOCOL_UDP)
634 return clib_error_return (0,
635 "only UDP protocol (%d) is supported, got %d",
636 IP_PROTOCOL_UDP, protocol);
638 if (port == (u16) ~ 0)
639 return clib_error_return (0, "UDP port number required");
641 /* Register client */
642 punt_socket_register (is_ip4, protocol, port, client_pathname);
644 u32 node_index = is_ip4 ? udp4_punt_socket_node.index :
645 udp6_punt_socket_node.index;
647 udp_register_dst_port (vm, port, node_index, is_ip4);
653 vnet_punt_socket_del (vlib_main_t * vm, bool is_ip4, u8 l4_protocol, u16 port)
655 punt_main_t *pm = &punt_main;
657 if (!pm->is_configured)
658 return clib_error_return (0, "socket is not configured");
660 punt_socket_unregister (is_ip4, l4_protocol, port);
661 udp_unregister_dst_port (vm, port, is_ip4);
667 * @brief Request IP traffic punt to the local TCP/IP stack.
670 * - UDP and TCP are the only protocols supported in the current implementation
672 * @param vm vlib_main_t corresponding to the current thread
673 * @param ipv IP protcol version.
674 * 4 - IPv4, 6 - IPv6, ~0 for both IPv6 and IPv4
675 * @param protocol 8-bits L4 protocol value
678 * @param port 16-bits L4 (TCP/IP) port number when applicable (UDP only)
680 * @returns 0 on success, non-zero value otherwise
683 vnet_punt_add_del (vlib_main_t * vm, u8 ipv, u8 protocol, u16 port,
687 /* For now we only support UDP punt */
688 if (protocol != IP_PROTOCOL_UDP && protocol != IP_PROTOCOL_TCP)
689 return clib_error_return (0,
690 "only UDP (%d) and TCP (%d) protocols are supported, got %d",
691 IP_PROTOCOL_UDP, IP_PROTOCOL_TCP, protocol);
693 if (ipv != (u8) ~ 0 && ipv != 4 && ipv != 6)
694 return clib_error_return (0, "IP version must be 4 or 6, got %d", ipv);
696 if (port == (u16) ~ 0)
698 if ((ipv == 4) || (ipv == (u8) ~ 0))
700 if (protocol == IP_PROTOCOL_UDP)
701 udp_punt_unknown (vm, 1, is_add);
702 else if (protocol == IP_PROTOCOL_TCP)
703 tcp_punt_unknown (vm, 1, is_add);
706 if ((ipv == 6) || (ipv == (u8) ~ 0))
708 if (protocol == IP_PROTOCOL_UDP)
709 udp_punt_unknown (vm, 0, is_add);
710 else if (protocol == IP_PROTOCOL_TCP)
711 tcp_punt_unknown (vm, 0, is_add);
719 if (protocol == IP_PROTOCOL_TCP)
720 return clib_error_return (0, "punt TCP ports is not supported yet");
722 if (ipv == 4 || ipv == (u8) ~ 0)
723 udp_register_dst_port (vm, port, udp4_punt_node.index, 1);
725 if (ipv == 6 || ipv == (u8) ~ 0)
726 udp_register_dst_port (vm, port, udp6_punt_node.index, 0);
731 return clib_error_return (0, "punt delete is not supported yet");
734 static clib_error_t *
735 punt_cli (vlib_main_t * vm,
736 unformat_input_t * input, vlib_cli_command_t * cmd)
743 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
745 if (unformat (input, "del"))
747 else if (unformat (input, "all"))
749 /* punt both IPv6 and IPv4 when used in CLI */
750 error = vnet_punt_add_del (vm, ~0, protocol, ~0, is_add);
752 clib_error_report (error);
754 else if (unformat (input, "%d", &port))
756 /* punt both IPv6 and IPv4 when used in CLI */
757 error = vnet_punt_add_del (vm, ~0, protocol, port, is_add);
759 clib_error_report (error);
761 else if (unformat (input, "udp"))
762 protocol = IP_PROTOCOL_UDP;
763 else if (unformat (input, "tcp"))
764 protocol = IP_PROTOCOL_TCP;
771 * The set of '<em>set punt</em>' commands allows specific IP traffic to
772 * be punted to the host TCP/IP stack
775 * - UDP is the only protocol supported in the current implementation
776 * - All TCP traffic is currently punted to the host by default
780 * Example of how to request NTP traffic to be punted
781 * @cliexcmd{set punt udp 125}
783 * Example of how to request all 'unknown' UDP traffic to be punted
784 * @cliexcmd{set punt udp all}
786 * Example of how to stop all 'unknown' UDP traffic to be punted
787 * @cliexcmd{set punt udp del all}
791 VLIB_CLI_COMMAND (punt_command, static) = {
793 .short_help = "set punt [udp|tcp] [del] <all | port-num1 [port-num2 ...]>",
794 .function = punt_cli,
799 punt_init (vlib_main_t * vm)
801 punt_main_t *pm = &punt_main;
803 pm->clients_by_dst_port6 = sparse_vec_new
804 (sizeof (pm->clients_by_dst_port6[0]),
805 BITS (((udp_header_t *) 0)->dst_port));
806 pm->clients_by_dst_port4 = sparse_vec_new
807 (sizeof (pm->clients_by_dst_port4[0]),
808 BITS (((udp_header_t *) 0)->dst_port));
810 pm->is_configured = false;
811 pm->interface_output_node = vlib_get_node_by_name (vm,
817 VLIB_INIT_FUNCTION (punt_init);
819 static clib_error_t *
820 punt_config (vlib_main_t * vm, unformat_input_t * input)
822 punt_main_t *pm = &punt_main;
823 char *socket_path = 0;
825 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
827 if (unformat (input, "socket %s", &socket_path))
828 strncpy (pm->sun_path, socket_path, 108 - 1);
830 return clib_error_return (0, "unknown input `%U'",
831 format_unformat_error, input);
834 if (socket_path == 0)
837 /* UNIX domain socket */
838 struct sockaddr_un addr;
839 if ((pm->socket_fd = socket (AF_UNIX, SOCK_DGRAM | SOCK_NONBLOCK, 0)) == -1)
841 return clib_error_return (0, "socket error");
844 memset (&addr, 0, sizeof (addr));
845 addr.sun_family = AF_UNIX;
846 if (*socket_path == '\0')
848 *addr.sun_path = '\0';
849 strncpy (addr.sun_path + 1, socket_path + 1,
850 sizeof (addr.sun_path) - 2);
854 strncpy (addr.sun_path, socket_path, sizeof (addr.sun_path) - 1);
855 unlink (socket_path);
858 if (bind (pm->socket_fd, (struct sockaddr *) &addr, sizeof (addr)) == -1)
860 return clib_error_return (0, "bind error");
863 /* Register socket */
864 clib_file_main_t *fm = &file_main;
865 clib_file_t template = { 0 };
866 template.read_function = punt_socket_read_ready;
867 template.file_descriptor = pm->socket_fd;
868 pm->clib_file_index = clib_file_add (fm, &template);
870 pm->is_configured = true;
875 VLIB_CONFIG_FUNCTION (punt_config, "punt");
878 * fd.io coding-style-patch-verification: ON
881 * eval: (c-set-style "gnu")