/* * Copyright (c) 2016 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @file * @brief Local TCP/IP stack punt infrastructure. * * Provides a set of VPP nodes together with the relevant APIs and CLI * commands in order to adjust and dispatch packets from the VPP data plane * to the local TCP/IP stack */ #include <vnet/ip/ip.h> #include <vlib/vlib.h> #include <vnet/pg/pg.h> #include <vnet/udp/udp.h> #include <vnet/tcp/tcp.h> #include <vnet/ip/punt.h> #include <vppinfra/sparse_vec.h> #include <vlib/unix/unix.h> #include <stdio.h> #include <unistd.h> #include <sys/socket.h> #include <sys/un.h> #include <sys/uio.h> #include <stdlib.h> #include <stdbool.h> #define foreach_punt_next \ _ (PUNT, "error-punt") typedef enum { #define _(s,n) PUNT_NEXT_##s, foreach_punt_next #undef _ PUNT_N_NEXT, } punt_next_t; enum punt_socket_rx_next_e { PUNT_SOCKET_RX_NEXT_INTERFACE_OUTPUT, PUNT_SOCKET_RX_NEXT_IP4_LOOKUP, PUNT_SOCKET_RX_NEXT_IP6_LOOKUP, PUNT_SOCKET_RX_N_NEXT }; vlib_node_registration_t udp4_punt_node; vlib_node_registration_t udp6_punt_node; vlib_node_registration_t udp4_punt_socket_node; vlib_node_registration_t udp6_punt_socket_node; static vlib_node_registration_t punt_socket_rx_node; punt_main_t punt_main; char * vnet_punt_get_server_pathname (void) { punt_main_t *pm = &punt_main; return pm->sun_path; } /** @brief IPv4/IPv6 UDP punt node main loop. This is the main loop inline function for IPv4/IPv6 UDP punt transition node. @param vm vlib_main_t corresponding to the current thread @param node vlib_node_runtime_t @param frame vlib_frame_t whose contents should be dispatched @param is_ipv4 indicates if called for IPv4 or IPv6 node */ always_inline uword udp46_punt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, int is_ip4) { u32 n_left_from, *from, *to_next; word advance; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; /* udp[46]_lookup hands us the data payload, not the IP header */ if (is_ip4) advance = -(sizeof (ip4_header_t) + sizeof (udp_header_t)); else advance = -(sizeof (ip6_header_t) + sizeof (udp_header_t)); while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, PUNT_NEXT_PUNT, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); vlib_buffer_advance (b0, advance); b0->error = node->errors[PUNT_ERROR_UDP_PORT]; } vlib_put_next_frame (vm, node, PUNT_NEXT_PUNT, n_left_to_next); } return from_frame->n_vectors; } static char *punt_error_strings[] = { #define punt_error(n,s) s, #include "punt_error.def" #undef punt_error }; /** @brief IPv4 UDP punt node. @node ip4-udp-punt This is the IPv4 UDP punt transition node. It is registered as a next node for the "ip4-udp-lookup" handling UDP port(s) requested for punt. The buffer's current data pointer is adjusted to the original packet IPv4 header. All buffers are dispatched to "error-punt". @param vm vlib_main_t corresponding to the current thread @param node vlib_node_runtime_t @param frame vlib_frame_t whose contents should be dispatched @par Graph mechanics: next index usage @em Sets: - <code>vnet_buffer(b)->current_data</code> - <code>vnet_buffer(b)->current_len</code> <em>Next Index:</em> - Dispatches the packet to the "error-punt" node */ static uword udp4_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return udp46_punt_inline (vm, node, from_frame, 1 /* is_ip4 */ ); } /** @brief IPv6 UDP punt node. @node ip6-udp-punt This is the IPv6 UDP punt transition node. It is registered as a next node for the "ip6-udp-lookup" handling UDP port(s) requested for punt. The buffer's current data pointer is adjusted to the original packet IPv6 header. All buffers are dispatched to "error-punt". @param vm vlib_main_t corresponding to the current thread @param node vlib_node_runtime_t @param frame vlib_frame_t whose contents should be dispatched @par Graph mechanics: next index usage @em Sets: - <code>vnet_buffer(b)->current_data</code> - <code>vnet_buffer(b)->current_len</code> <em>Next Index:</em> - Dispatches the packet to the "error-punt" node */ static uword udp6_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return udp46_punt_inline (vm, node, from_frame, 0 /* is_ip4 */ ); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (udp4_punt_node) = { .function = udp4_punt, .name = "ip4-udp-punt", /* Takes a vector of packets. */ .vector_size = sizeof (u32), .n_errors = PUNT_N_ERROR, .error_strings = punt_error_strings, .n_next_nodes = PUNT_N_NEXT, .next_nodes = { #define _(s,n) [PUNT_NEXT_##s] = n, foreach_punt_next #undef _ }, }; VLIB_NODE_FUNCTION_MULTIARCH (udp4_punt_node, udp4_punt); VLIB_REGISTER_NODE (udp6_punt_node) = { .function = udp6_punt, .name = "ip6-udp-punt", /* Takes a vector of packets. */ .vector_size = sizeof (u32), .n_errors = PUNT_N_ERROR, .error_strings = punt_error_strings, .n_next_nodes = PUNT_N_NEXT, .next_nodes = { #define _(s,n) [PUNT_NEXT_##s] = n, foreach_punt_next #undef _ }, }; VLIB_NODE_FUNCTION_MULTIARCH (udp6_punt_node, udp6_punt);; /* *INDENT-ON* */ static punt_client_t * punt_client_get (bool is_ip4, u16 port) { punt_main_t *pm = &punt_main; punt_client_t *v = is_ip4 ? pm->clients_by_dst_port4 : pm->clients_by_dst_port6; u16 i = sparse_vec_index (v, port); if (i == SPARSE_VEC_INVALID_INDEX) return 0; return &vec_elt (v, i); } static struct sockaddr_un * punt_socket_get (bool is_ip4, u16 port) { punt_client_t *v = punt_client_get (is_ip4, port); if (v) return &v->caddr; return NULL; } static void punt_socket_register (bool is_ip4, u8 protocol, u16 port, char *client_pathname) { punt_main_t *pm = &punt_main; punt_client_t c, *n; punt_client_t *v = is_ip4 ? pm->clients_by_dst_port4 : pm->clients_by_dst_port6; memset (&c, 0, sizeof (c)); memcpy (c.caddr.sun_path, client_pathname, sizeof (c.caddr.sun_path)); c.caddr.sun_family = AF_UNIX; c.port = port; n = sparse_vec_validate (v, port); n[0] = c; } /* $$$$ Just leaves the mapping in place for now */ static void punt_socket_unregister (bool is_ip4, u8 protocol, u16 port) { return; } typedef struct { punt_client_t client; u8 is_midchain; } udp_punt_trace_t; u8 * format_udp_punt_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); udp_punt_trace_t *t = va_arg (*args, udp_punt_trace_t *); u32 indent = format_get_indent (s); s = format (s, "to: %s", t->client.caddr.sun_path); if (t->is_midchain) { s = format (s, "\n%U(buffer is part of chain)", format_white_space, indent); } return s; } always_inline uword udp46_punt_socket_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, bool is_ip4) { u32 *buffers = vlib_frame_args (frame); uword n_packets = frame->n_vectors; struct iovec *iovecs = 0; punt_main_t *pm = &punt_main; int i; u32 node_index = is_ip4 ? udp4_punt_socket_node.index : udp6_punt_socket_node.index; for (i = 0; i < n_packets; i++) { struct iovec *iov; vlib_buffer_t *b; uword l; punt_packetdesc_t packetdesc; b = vlib_get_buffer (vm, buffers[i]); /* Reverse UDP Punt advance */ udp_header_t *udp; if (is_ip4) { vlib_buffer_advance (b, -(sizeof (ip4_header_t) + sizeof (udp_header_t))); ip4_header_t *ip = vlib_buffer_get_current (b); udp = (udp_header_t *) (ip + 1); } else { vlib_buffer_advance (b, -(sizeof (ip6_header_t) + sizeof (udp_header_t))); ip6_header_t *ip = vlib_buffer_get_current (b); udp = (udp_header_t *) (ip + 1); } u16 port = clib_net_to_host_u16 (udp->dst_port); /* * Find registerered client * If no registered client, drop packet and count */ struct sockaddr_un *caddr; caddr = punt_socket_get (is_ip4, port); if (!caddr) { vlib_node_increment_counter (vm, node_index, PUNT_ERROR_SOCKET_TX_ERROR, 1); goto error; } punt_client_t *c = NULL; if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED)) { c = punt_client_get (is_ip4, port); udp_punt_trace_t *t; t = vlib_add_trace (vm, node, b, sizeof (t[0])); clib_memcpy (&t->client, c, sizeof (t->client)); } /* Re-set iovecs if present. */ if (iovecs) _vec_len (iovecs) = 0; /* Add packet descriptor */ packetdesc.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; packetdesc.action = 0; vec_add2 (iovecs, iov, 1); iov->iov_base = &packetdesc; iov->iov_len = sizeof (packetdesc); /** VLIB buffer chain -> Unix iovec(s). */ vlib_buffer_advance (b, -(sizeof (ethernet_header_t))); vec_add2 (iovecs, iov, 1); iov->iov_base = b->data + b->current_data; iov->iov_len = l = b->current_length; if (PREDICT_FALSE (b->flags & VLIB_BUFFER_NEXT_PRESENT)) { do { b = vlib_get_buffer (vm, b->next_buffer); if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED)) { if (PREDICT_FALSE (!c)) { c = punt_client_get (is_ip4, port); } udp_punt_trace_t *t; t = vlib_add_trace (vm, node, b, sizeof (t[0])); clib_memcpy (&t->client, c, sizeof (t->client)); t->is_midchain = 1; } vec_add2 (iovecs, iov, 1); iov->iov_base = b->data + b->current_data; iov->iov_len = b->current_length; l += b->current_length; } while (b->flags & VLIB_BUFFER_NEXT_PRESENT); } struct msghdr msg = { .msg_name = caddr, .msg_namelen = sizeof (*caddr), .msg_iov = iovecs, .msg_iovlen = vec_len (iovecs), }; if (sendmsg (pm->socket_fd, &msg, 0) < (ssize_t) l) vlib_node_increment_counter (vm, node_index, PUNT_ERROR_SOCKET_TX_ERROR, 1); } error: vlib_buffer_free (vm, buffers, n_packets); return n_packets; } static uword udp4_punt_socket (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return udp46_punt_socket_inline (vm, node, from_frame, true /* is_ip4 */ ); } static uword udp6_punt_socket (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return udp46_punt_socket_inline (vm, node, from_frame, false /* is_ip4 */ ); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (udp4_punt_socket_node) = { .function = udp4_punt_socket, .name = "ip4-udp-punt-socket", .format_trace = format_udp_punt_trace, .flags = VLIB_NODE_FLAG_IS_DROP, /* Takes a vector of packets. */ .vector_size = sizeof (u32), .n_errors = PUNT_N_ERROR, .error_strings = punt_error_strings, }; VLIB_REGISTER_NODE (udp6_punt_socket_node) = { .function = udp6_punt_socket, .name = "ip6-udp-punt-socket", .format_trace = format_udp_punt_trace, .flags = VLIB_NODE_FLAG_IS_DROP, .vector_size = sizeof (u32), .n_errors = PUNT_N_ERROR, .error_strings = punt_error_strings, }; /* *INDENT-ON* */ typedef struct { enum punt_action_e action; u32 sw_if_index; } punt_trace_t; static u8 * format_punt_trace (u8 * s, va_list * va) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); vnet_main_t *vnm = vnet_get_main (); punt_trace_t *t = va_arg (*va, punt_trace_t *); s = format (s, "%U Action: %d", format_vnet_sw_if_index_name, vnm, t->sw_if_index, t->action); return s; } static uword punt_socket_rx_fd (vlib_main_t * vm, vlib_node_runtime_t * node, u32 fd) { const uword buffer_size = VLIB_BUFFER_DATA_SIZE; u32 n_trace = vlib_get_trace_count (vm, node); u32 next = node->cached_next_index; u32 n_left_to_next, next_index; u32 *to_next; u32 error = PUNT_ERROR_NONE; vlib_get_next_frame (vm, node, next, to_next, n_left_to_next); /* $$$$ Only dealing with one buffer at the time for now */ u32 bi; vlib_buffer_t *b; punt_packetdesc_t packetdesc; ssize_t size; struct iovec io[2]; if (vlib_buffer_alloc (vm, &bi, 1) != 1) { error = PUNT_ERROR_NOBUFFER; goto error; } b = vlib_get_buffer (vm, bi); io[0].iov_base = &packetdesc; io[0].iov_len = sizeof (packetdesc); io[1].iov_base = b->data; io[1].iov_len = buffer_size; size = readv (fd, io, 2); /* We need at least the packet descriptor plus a header */ if (size <= (int) (sizeof (packetdesc) + sizeof (ip4_header_t))) { vlib_buffer_free (vm, &bi, 1); error = PUNT_ERROR_READV; goto error; } b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED; b->current_length = size - sizeof (packetdesc); VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b); switch (packetdesc.action) { case PUNT_L2: vnet_buffer (b)->sw_if_index[VLIB_TX] = packetdesc.sw_if_index; next_index = PUNT_SOCKET_RX_NEXT_INTERFACE_OUTPUT; break; case PUNT_IP4_ROUTED: vnet_buffer (b)->sw_if_index[VLIB_RX] = packetdesc.sw_if_index; vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0; next_index = PUNT_SOCKET_RX_NEXT_IP4_LOOKUP; break; case PUNT_IP6_ROUTED: vnet_buffer (b)->sw_if_index[VLIB_RX] = packetdesc.sw_if_index; vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0; next_index = PUNT_SOCKET_RX_NEXT_IP6_LOOKUP; break; default: error = PUNT_ERROR_ACTION; vlib_buffer_free (vm, &bi, 1); goto error; } if (PREDICT_FALSE (n_trace > 0)) { punt_trace_t *t; vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ ); vlib_set_trace_count (vm, node, --n_trace); t = vlib_add_trace (vm, node, b, sizeof (*t)); t->sw_if_index = packetdesc.sw_if_index; t->action = packetdesc.action; } to_next[0] = bi; to_next++; n_left_to_next--; vlib_validate_buffer_enqueue_x1 (vm, node, next, to_next, n_left_to_next, bi, next_index); vlib_put_next_frame (vm, node, next, n_left_to_next); return 1; error: vlib_node_increment_counter (vm, punt_socket_rx_node.index, error, 1); return 0; } static uword punt_socket_rx (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { punt_main_t *pm = &punt_main; u32 total_count = 0; int i; for (i = 0; i < vec_len (pm->ready_fds); i++) { total_count += punt_socket_rx_fd (vm, node, pm->ready_fds[i]); vec_del1 (pm->ready_fds, i); } return total_count; } VLIB_REGISTER_NODE (punt_socket_rx_node, static) = { .function = punt_socket_rx,.name = "punt-socket-rx",.type = VLIB_NODE_TYPE_INPUT,.state = VLIB_NODE_STATE_INTERRUPT,.vector_size = 1,.n_errors = PUNT_N_ERROR,.error_strings = punt_error_strings,.n_next_nodes = PUNT_SOCKET_RX_N_NEXT,.next_nodes = { [PUNT_SOCKET_RX_NEXT_INTERFACE_OUTPUT] = "interface-output", [PUNT_SOCKET_RX_NEXT_IP4_LOOKUP] = "ip4-lookup", [PUNT_SOCKET_RX_NEXT_IP6_LOOKUP] = "ip6-lookup",},.format_trace = format_punt_trace,}; static clib_error_t * punt_socket_read_ready (clib_file_t * uf) { vlib_main_t *vm = vlib_get_main (); punt_main_t *pm = &punt_main; /** Schedule the rx node */ vlib_node_set_interrupt_pending (vm, punt_socket_rx_node.index); vec_add1 (pm->ready_fds, uf->file_descriptor); return 0; } clib_error_t * vnet_punt_socket_add (vlib_main_t * vm, u32 header_version, bool is_ip4, u8 protocol, u16 port, char *client_pathname) { punt_main_t *pm = &punt_main; if (!pm->is_configured) return clib_error_return (0, "socket is not configured"); if (header_version != PUNT_PACKETDESC_VERSION) return clib_error_return (0, "Invalid packet descriptor version"); /* For now we only support UDP punt */ if (protocol != IP_PROTOCOL_UDP) return clib_error_return (0, "only UDP protocol (%d) is supported, got %d", IP_PROTOCOL_UDP, protocol); if (port == (u16) ~ 0) return clib_error_return (0, "UDP port number required"); /* Register client */ punt_socket_register (is_ip4, protocol, port, client_pathname); u32 node_index = is_ip4 ? udp4_punt_socket_node.index : udp6_punt_socket_node.index; udp_register_dst_port (vm, port, node_index, is_ip4); return 0; } clib_error_t * vnet_punt_socket_del (vlib_main_t * vm, bool is_ip4, u8 l4_protocol, u16 port) { punt_main_t *pm = &punt_main; if (!pm->is_configured) return clib_error_return (0, "socket is not configured"); punt_socket_unregister (is_ip4, l4_protocol, port); udp_unregister_dst_port (vm, port, is_ip4); return 0; } /** * @brief Request IP traffic punt to the local TCP/IP stack. * * @em Note * - UDP and TCP are the only protocols supported in the current implementation * * @param vm vlib_main_t corresponding to the current thread * @param ipv IP protcol version. * 4 - IPv4, 6 - IPv6, ~0 for both IPv6 and IPv4 * @param protocol 8-bits L4 protocol value * UDP is 17 * TCP is 1 * @param port 16-bits L4 (TCP/IP) port number when applicable (UDP only) * * @returns 0 on success, non-zero value otherwise */ clib_error_t * vnet_punt_add_del (vlib_main_t * vm, u8 ipv, u8 protocol, u16 port, bool is_add) { /* For now we only support UDP punt */ if (protocol != IP_PROTOCOL_UDP && protocol != IP_PROTOCOL_TCP) return clib_error_return (0, "only UDP (%d) and TCP (%d) protocols are supported, got %d", IP_PROTOCOL_UDP, IP_PROTOCOL_TCP, protocol); if (ipv != (u8) ~ 0 && ipv != 4 && ipv != 6) return clib_error_return (0, "IP version must be 4 or 6, got %d", ipv); if (port == (u16) ~ 0) { if ((ipv == 4) || (ipv == (u8) ~ 0)) { if (protocol == IP_PROTOCOL_UDP) udp_punt_unknown (vm, 1, is_add); else if (protocol == IP_PROTOCOL_TCP) tcp_punt_unknown (vm, 1, is_add); } if ((ipv == 6) || (ipv == (u8) ~ 0)) { if (protocol == IP_PROTOCOL_UDP) udp_punt_unknown (vm, 0, is_add); else if (protocol == IP_PROTOCOL_TCP) tcp_punt_unknown (vm, 0, is_add); } return 0; } else if (is_add) { if (protocol == IP_PROTOCOL_TCP) return clib_error_return (0, "punt TCP ports is not supported yet"); if (ipv == 4 || ipv == (u8) ~ 0) udp_register_dst_port (vm, port, udp4_punt_node.index, 1); if (ipv == 6 || ipv == (u8) ~ 0) udp_register_dst_port (vm, port, udp6_punt_node.index, 0); return 0; } else return clib_error_return (0, "punt delete is not supported yet"); } static clib_error_t * punt_cli (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { u32 port; bool is_add = true; u32 protocol = ~0; clib_error_t *error; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "del")) is_add = false; else if (unformat (input, "all")) { /* punt both IPv6 and IPv4 when used in CLI */ error = vnet_punt_add_del (vm, ~0, protocol, ~0, is_add); if (error) clib_error_report (error); } else if (unformat (input, "%d", &port)) { /* punt both IPv6 and IPv4 when used in CLI */ error = vnet_punt_add_del (vm, ~0, protocol, port, is_add); if (error) clib_error_report (error); } else if (unformat (input, "udp")) protocol = IP_PROTOCOL_UDP; else if (unformat (input, "tcp")) protocol = IP_PROTOCOL_TCP; } return 0; } /*? * The set of '<em>set punt</em>' commands allows specific IP traffic to * be punted to the host TCP/IP stack * * @em Note * - UDP is the only protocol supported in the current implementation * - All TCP traffic is currently punted to the host by default * * @cliexpar * @parblock * Example of how to request NTP traffic to be punted * @cliexcmd{set punt udp 125} * * Example of how to request all 'unknown' UDP traffic to be punted * @cliexcmd{set punt udp all} * * Example of how to stop all 'unknown' UDP traffic to be punted * @cliexcmd{set punt udp del all} * @endparblock ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (punt_command, static) = { .path = "set punt", .short_help = "set punt [udp|tcp] [del] <all | port-num1 [port-num2 ...]>", .function = punt_cli, }; /* *INDENT-ON* */ clib_error_t * punt_init (vlib_main_t * vm) { punt_main_t *pm = &punt_main; pm->clients_by_dst_port6 = sparse_vec_new (sizeof (pm->clients_by_dst_port6[0]), BITS (((udp_header_t *) 0)->dst_port)); pm->clients_by_dst_port4 = sparse_vec_new (sizeof (pm->clients_by_dst_port4[0]), BITS (((udp_header_t *) 0)->dst_port)); pm->is_configured = false; pm->interface_output_node = vlib_get_node_by_name (vm, (u8 *) "interface-output"); return 0; } VLIB_INIT_FUNCTION (punt_init); static clib_error_t * punt_config (vlib_main_t * vm, unformat_input_t * input) { punt_main_t *pm = &punt_main; char *socket_path = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "socket %s", &socket_path)) strncpy (pm->sun_path, socket_path, 108 - 1); else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } if (socket_path == 0) return 0; /* UNIX domain socket */ struct sockaddr_un addr; if ((pm->socket_fd = socket (AF_UNIX, SOCK_DGRAM | SOCK_NONBLOCK, 0)) == -1) { return clib_error_return (0, "socket error"); } memset (&addr, 0, sizeof (addr)); addr.sun_family = AF_UNIX; if (*socket_path == '\0') { *addr.sun_path = '\0'; strncpy (addr.sun_path + 1, socket_path + 1, sizeof (addr.sun_path) - 2); } else { strncpy (addr.sun_path, socket_path, sizeof (addr.sun_path) - 1); unlink (socket_path); } if (bind (pm->socket_fd, (struct sockaddr *) &addr, sizeof (addr)) == -1) { return clib_error_return (0, "bind error"); } /* Register socket */ clib_file_main_t *fm = &file_main; clib_file_t template = { 0 }; template.read_function = punt_socket_read_ready; template.file_descriptor = pm->socket_fd; pm->clib_file_index = clib_file_add (fm, &template); pm->is_configured = true; return 0; } VLIB_CONFIG_FUNCTION (punt_config, "punt"); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */