* @file
* @brief Local TCP/IP stack punt infrastructure.
*
- * Provides a set of VPP nodes togather with the relevant APIs and CLI
+ * 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/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 <stdlib.h>
+#include <stdbool.h>
-#define foreach_punt_next \
+#define foreach_punt_next \
_ (PUNT, "error-punt")
typedef enum
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.
#undef _
},
};
-/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (udp6_punt_node, udp6_punt);;
+/* *INDENT-ON* */
+
+static struct sockaddr_un *
+punt_socket_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).caddr;
+}
+
+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;
+}
+
+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;
+ }
+
+ /* 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);
+
+ 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) < l)
+ vlib_node_increment_counter (vm, node_index,
+ PUNT_ERROR_SOCKET_TX_ERROR, 1);
+ }
+
+error:
+ vlib_buffer_free_no_next (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",
+ .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",
+ .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 (unix_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.
*
*/
clib_error_t *
vnet_punt_add_del (vlib_main_t * vm, u8 ipv, u8 protocol, u16 port,
- int is_add)
+ bool is_add)
{
/* For now we only support UDP punt */
if (protocol != IP_PROTOCOL_UDP)
return 0;
}
-
else
return clib_error_return (0, "punt delete is not supported yet");
}
unformat_input_t * input, vlib_cli_command_t * cmd)
{
u32 udp_port;
- int is_add = 1;
+ bool is_add = true;
clib_error_t *error;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "del"))
- is_add = 0;
+ is_add = false;
if (unformat (input, "all"))
{
/* punt both IPv6 and IPv4 when used in CLI */
else if (unformat (input, "%d", &udp_port))
{
/* punt both IPv6 and IPv4 when used in CLI */
- error = vnet_punt_add_del (vm, ~0, IP_PROTOCOL_UDP,
- udp_port, is_add);
+ error =
+ vnet_punt_add_del (vm, ~0, IP_PROTOCOL_UDP, udp_port, is_add);
if (error)
clib_error_report (error);
}
};
/* *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 */
+ unix_main_t *um = &unix_main;
+ unix_file_t template = { 0 };
+ template.read_function = punt_socket_read_ready;
+ template.file_descriptor = pm->socket_fd;
+ pm->unix_file_index = unix_file_add (um, &template);
+
+ pm->is_configured = true;
+
+ return 0;
+}
+
+VLIB_CONFIG_FUNCTION (punt_config, "punt");
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / commitdiff