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authorDamjan Marion <damarion@cisco.com>2016-12-19 23:05:39 +0100
committerDamjan Marion <damarion@cisco.com>2016-12-28 12:25:14 +0100
commit7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 (patch)
tree5de62f8dbd3a752f5a676ca600e43d2652d1ff1a /src/vnet/unix
parent696f1adec0df3b8f161862566dd9c86174302658 (diff)
Reorganize source tree to use single autotools instance
Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vnet/unix')
-rw-r--r--src/vnet/unix/gdb_funcs.c171
-rw-r--r--src/vnet/unix/pcap.c241
-rw-r--r--src/vnet/unix/pcap.h230
-rw-r--r--src/vnet/unix/pcap2pg.c182
-rw-r--r--src/vnet/unix/tap.api123
-rw-r--r--src/vnet/unix/tap_api.c257
-rw-r--r--src/vnet/unix/tapcli.c1328
-rw-r--r--src/vnet/unix/tapcli.h52
-rw-r--r--src/vnet/unix/tuntap.c1000
-rw-r--r--src/vnet/unix/tuntap.h36
10 files changed, 3620 insertions, 0 deletions
diff --git a/src/vnet/unix/gdb_funcs.c b/src/vnet/unix/gdb_funcs.c
new file mode 100644
index 00000000000..cfb4b247800
--- /dev/null
+++ b/src/vnet/unix/gdb_funcs.c
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2015 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 Host utility functions
+ */
+#include <vppinfra/format.h>
+#include <vlib/vlib.h>
+
+#include <vlib/threads.h>
+
+
+
+/**
+ * @brief GDB callable function: vl - Return vector length of vector
+ *
+ * @param *p - void - address of vector
+ *
+ * @return length - u32
+ *
+ */
+u32 vl(void *p)
+{
+ return vec_len (p);
+}
+
+/**
+ * @brief GDB callable function: pe - call pool_elts - number of elements in a pool
+ *
+ * @param *v - void - address of pool
+ *
+ * @return number - uword
+ *
+ */
+uword pe (void *v)
+{
+ return (pool_elts(v));
+}
+
+/**
+ * @brief GDB callable function: pifi - call pool_is_free_index - is passed index free?
+ *
+ * @param *p - void - address of pool
+ * @param *index - u32
+ *
+ * @return 0|1 - int
+ *
+ */
+int pifi (void *p, u32 index)
+{
+ return pool_is_free_index (p, index);
+}
+
+/**
+ * @brief GDB callable function: debug_hex_bytes - return formatted hex string
+ *
+ * @param *s - u8
+ * @param n - u32 - number of bytes to format
+ *
+ */
+void debug_hex_bytes (u8 *s, u32 n)
+{
+ fformat (stderr, "%U\n", format_hex_bytes, s, n);
+}
+
+/**
+ * @brief GDB callable function: vlib_dump_frame_ownership
+ *
+ */
+void vlib_dump_frame_ownership (void)
+{
+ vlib_main_t * vm = vlib_get_main();
+ vlib_node_main_t * nm = &vm->node_main;
+ vlib_node_runtime_t * this_node_runtime;
+ vlib_next_frame_t * nf;
+ u32 first_nf_index;
+ u32 index;
+
+ vec_foreach(this_node_runtime, nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
+ {
+ first_nf_index = this_node_runtime->next_frame_index;
+
+ for (index = first_nf_index; index < first_nf_index +
+ this_node_runtime->n_next_nodes; index++)
+ {
+ vlib_node_runtime_t * owned_runtime;
+ nf = vec_elt_at_index (vm->node_main.next_frames, index);
+ if (nf->flags & VLIB_FRAME_OWNER)
+ {
+ owned_runtime = vec_elt_at_index (nm->nodes_by_type[0],
+ nf->node_runtime_index);
+ fformat(stderr,
+ "%s next index %d owns enqueue rights to %s\n",
+ nm->nodes[this_node_runtime->node_index]->name,
+ index - first_nf_index,
+ nm->nodes[owned_runtime->node_index]->name);
+ fformat (stderr, " nf index %d nf->frame_index %d\n",
+ nf - vm->node_main.next_frames,
+ nf->frame_index);
+ }
+ }
+ }
+}
+
+/**
+ * @brief GDB callable function: vlib_runtime_index_to_node_name
+ *
+ * Takes node index and will return the node name.
+ *
+ * @param index - u32
+ */
+void vlib_runtime_index_to_node_name (u32 index)
+{
+ vlib_main_t * vm = vlib_get_main();
+ vlib_node_main_t * nm = &vm->node_main;
+
+ if (index > vec_len (nm->nodes))
+ {
+ fformat(stderr, "%d out of range, max %d\n", vec_len(nm->nodes));
+ return;
+ }
+
+ fformat(stderr, "node runtime index %d name %s\n", index, nm->nodes[index]->name);
+}
+
+
+/**
+ * @brief GDB callable function: show_gdb_command_fn - show gdb
+ *
+ * Shows list of functions for VPP available in GDB
+ *
+ * @return error - clib_error_t
+ */
+static clib_error_t *
+show_gdb_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ vlib_cli_output (vm, "vl(p) returns vec_len(p)");
+ vlib_cli_output (vm, "pe(p) returns pool_elts(p)");
+ vlib_cli_output (vm, "pifi(p, i) returns pool_is_free_index(p, i)");
+ vlib_cli_output (vm, "debug_hex_bytes (ptr, n_bytes) dumps n_bytes in hex");
+ vlib_cli_output (vm, "vlib_dump_frame_ownership() does what it says");
+ vlib_cli_output (vm, "vlib_runtime_index_to_node_name (index) prints NN");
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (show_gdb_funcs_command, static) = {
+ .path = "show gdb",
+ .short_help = "Describe functions which can be called from gdb",
+ .function = show_gdb_command_fn,
+};
+
+/* Cafeteria plan, maybe you don't want these functions */
+clib_error_t *
+gdb_func_init (vlib_main_t * vm) { return 0; }
+
+VLIB_INIT_FUNCTION (gdb_func_init);
diff --git a/src/vnet/unix/pcap.c b/src/vnet/unix/pcap.c
new file mode 100644
index 00000000000..bba225f74ab
--- /dev/null
+++ b/src/vnet/unix/pcap.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * pcap.c: libpcap packet capture format
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vnet/unix/pcap.h>
+#include <sys/fcntl.h>
+
+/**
+ * @file
+ * @brief PCAP function.
+ *
+ * Usage:
+ *
+ * <code><pre>
+ * \#include <vnet/unix/pcap.h>
+ *
+ * static pcap_main_t pcap = {
+ * .file_name = "/tmp/ip4",
+ * .n_packets_to_capture = 2,
+ * .packet_type = PCAP_PACKET_TYPE_ip,
+ * };
+ * </pre></code>
+ *
+ * To add a buffer:
+ *
+ * <code><pre>pcap_add_buffer (&pcap, vm, pi0, 128);</pre></code>
+ *
+ * File will be written after @c n_packets_to_capture or call to pcap_write (&amp;pcap).
+ *
+*/
+
+/**
+ * @brief Close PCAP file
+ *
+ * @return rc - clib_error_t
+ *
+ */
+clib_error_t *
+pcap_close (pcap_main_t * pm)
+{
+ close (pm->file_descriptor);
+ pm->flags &= ~PCAP_MAIN_INIT_DONE;
+ pm->file_descriptor = -1;
+ return 0;
+}
+
+/**
+ * @brief Write PCAP file
+ *
+ * @return rc - clib_error_t
+ *
+ */
+clib_error_t *
+pcap_write (pcap_main_t * pm)
+{
+ clib_error_t * error = 0;
+
+ if (! (pm->flags & PCAP_MAIN_INIT_DONE))
+ {
+ pcap_file_header_t fh;
+ int n;
+
+ if (! pm->file_name)
+ pm->file_name = "/tmp/vnet.pcap";
+
+ pm->file_descriptor = open (pm->file_name, O_CREAT | O_TRUNC | O_WRONLY, 0664);
+ if (pm->file_descriptor < 0)
+ {
+ error = clib_error_return_unix (0, "failed to open `%s'", pm->file_name);
+ goto done;
+ }
+
+ pm->flags |= PCAP_MAIN_INIT_DONE;
+ pm->n_packets_captured = 0;
+ pm->n_pcap_data_written = 0;
+
+ /* Write file header. */
+ memset (&fh, 0, sizeof (fh));
+ fh.magic = 0xa1b2c3d4;
+ fh.major_version = 2;
+ fh.minor_version = 4;
+ fh.time_zone = 0;
+ fh.max_packet_size_in_bytes = 1 << 16;
+ fh.packet_type = pm->packet_type;
+ n = write (pm->file_descriptor, &fh, sizeof (fh));
+ if (n != sizeof (fh))
+ {
+ if (n < 0)
+ error = clib_error_return_unix (0, "write file header `%s'", pm->file_name);
+ else
+ error = clib_error_return (0, "short write of file header `%s'", pm->file_name);
+ goto done;
+ }
+ }
+
+ while (vec_len (pm->pcap_data) > pm->n_pcap_data_written)
+ {
+ int n = vec_len (pm->pcap_data) - pm->n_pcap_data_written;
+
+ n = write (pm->file_descriptor,
+ vec_elt_at_index (pm->pcap_data, pm->n_pcap_data_written), n);
+
+ if (n < 0 && unix_error_is_fatal (errno))
+ {
+ error = clib_error_return_unix (0, "write `%s'", pm->file_name);
+ goto done;
+ }
+ pm->n_pcap_data_written += n;
+ }
+
+ if (pm->n_pcap_data_written >= vec_len (pm->pcap_data))
+ {
+ vec_reset_length (pm->pcap_data);
+ pm->n_pcap_data_written = 0;
+ }
+
+ if (pm->n_packets_captured >= pm->n_packets_to_capture)
+ pcap_close(pm);
+
+ done:
+ if (error)
+ {
+ if (pm->file_descriptor >= 0)
+ close (pm->file_descriptor);
+ }
+ return error;
+}
+
+/**
+ * @brief Read PCAP file
+ *
+ * @return rc - clib_error_t
+ *
+ */
+clib_error_t * pcap_read (pcap_main_t * pm)
+{
+ clib_error_t * error = 0;
+ int fd, need_swap, n;
+ pcap_file_header_t fh;
+ pcap_packet_header_t ph;
+
+ fd = open (pm->file_name, O_RDONLY);
+ if (fd < 0)
+ {
+ error = clib_error_return_unix (0, "open `%s'", pm->file_name);
+ goto done;
+ }
+
+ if (read (fd, &fh, sizeof (fh)) != sizeof (fh))
+ {
+ error = clib_error_return_unix (0, "read file header `%s'", pm->file_name);
+ goto done;
+ }
+
+ need_swap = 0;
+ if (fh.magic == 0xd4c3b2a1)
+ {
+ need_swap = 1;
+#define _(t,f) fh.f = clib_byte_swap_##t (fh.f);
+ foreach_pcap_file_header;
+#undef _
+ }
+
+ if (fh.magic != 0xa1b2c3d4)
+ {
+ error = clib_error_return (0, "bad magic `%s'", pm->file_name);
+ goto done;
+ }
+
+ pm->min_packet_bytes = 0;
+ pm->max_packet_bytes = 0;
+ while ((n = read (fd, &ph, sizeof (ph))) != 0)
+ {
+ u8 * data;
+
+ if (need_swap)
+ {
+#define _(t,f) ph.f = clib_byte_swap_##t (ph.f);
+ foreach_pcap_packet_header;
+#undef _
+ }
+
+ data = vec_new (u8, ph.n_bytes_in_packet);
+ if (read (fd, data, ph.n_packet_bytes_stored_in_file) != ph.n_packet_bytes_stored_in_file)
+ {
+ error = clib_error_return (0, "short read `%s'", pm->file_name);
+ goto done;
+ }
+
+ if (vec_len (pm->packets_read) == 0)
+ pm->min_packet_bytes = pm->max_packet_bytes = ph.n_bytes_in_packet;
+ else
+ {
+ pm->min_packet_bytes = clib_min (pm->min_packet_bytes, ph.n_bytes_in_packet);
+ pm->max_packet_bytes = clib_max (pm->max_packet_bytes, ph.n_bytes_in_packet);
+ }
+
+ vec_add1 (pm->packets_read, data);
+ }
+
+ done:
+ if (fd >= 0)
+ close (fd);
+ return error;
+
+}
diff --git a/src/vnet/unix/pcap.h b/src/vnet/unix/pcap.h
new file mode 100644
index 00000000000..6aaf32bef7e
--- /dev/null
+++ b/src/vnet/unix/pcap.h
@@ -0,0 +1,230 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * pcap.h: libpcap packet capture format
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+/**
+ * @file
+ * @brief PCAP utility definitions
+ */
+#ifndef included_vnet_pcap_h
+#define included_vnet_pcap_h
+
+#include <vlib/vlib.h>
+
+/**
+ * @brief Packet types supported by PCAP
+ *
+ * null 0
+ * ethernet 1
+ * ppp 9
+ * ip 12
+ * hdlc 104
+ */
+#define foreach_vnet_pcap_packet_type \
+ _ (null, 0) \
+ _ (ethernet, 1) \
+ _ (ppp, 9) \
+ _ (ip, 12) \
+ _ (hdlc, 104)
+
+typedef enum {
+#define _(f,n) PCAP_PACKET_TYPE_##f = (n),
+ foreach_vnet_pcap_packet_type
+#undef _
+} pcap_packet_type_t;
+
+#define foreach_pcap_file_header \
+ /** 0xa1b2c3d4 host byte order. \
+ 0xd4c3b2a1 => need to byte swap everything. */ \
+ _ (u32, magic) \
+ \
+ /** Currently major 2 minor 4. */ \
+ _ (u16, major_version) \
+ _ (u16, minor_version) \
+ \
+ /** 0 for GMT. */ \
+ _ (u32, time_zone) \
+ \
+ /** Accuracy of timestamps. Typically set to 0. */ \
+ _ (u32, sigfigs) \
+ \
+ /** Size of largest packet in file. */ \
+ _ (u32, max_packet_size_in_bytes) \
+ \
+ /** One of vnet_pcap_packet_type_t. */ \
+ _ (u32, packet_type)
+
+/** File header struct */
+typedef struct {
+#define _(t, f) t f;
+ foreach_pcap_file_header
+#undef _
+} pcap_file_header_t;
+
+#define foreach_pcap_packet_header \
+ /** Time stamp in seconds */ \
+ _ (u32, time_in_sec) \
+ /** Time stamp in microseconds. */ \
+ _ (u32, time_in_usec) \
+ \
+ /** Number of bytes stored in file. */ \
+ _ (u32, n_packet_bytes_stored_in_file) \
+ /** Number of bytes in actual packet. */ \
+ _ (u32, n_bytes_in_packet)
+
+/** Packet header. */
+typedef struct {
+#define _(t, f) t f;
+ foreach_pcap_packet_header
+#undef _
+
+ /** Packet data follows. */
+ u8 data[0];
+} pcap_packet_header_t;
+
+/**
+ * @brief PCAP main state data structure
+ */
+typedef struct {
+ /** File name of pcap output. */
+ char * file_name;
+
+ /** Number of packets to capture. */
+ u32 n_packets_to_capture;
+
+ /** Packet type */
+ pcap_packet_type_t packet_type;
+
+ /** Number of packets currently captured. */
+ u32 n_packets_captured;
+
+ /** flags */
+ u32 flags;
+#define PCAP_MAIN_INIT_DONE (1 << 0)
+
+ /** File descriptor for reading/writing. */
+ int file_descriptor;
+
+ /** Bytes written */
+ u32 n_pcap_data_written;
+
+ /** Vector of pcap data. */
+ u8 * pcap_data;
+
+ /** Packets read from file. */
+ u8 ** packets_read;
+
+ /** Min/Max Packet bytes */
+ u32 min_packet_bytes, max_packet_bytes;
+} pcap_main_t;
+
+/** Write out data to output file. */
+clib_error_t * pcap_write (pcap_main_t * pm);
+
+/** Read data from file. */
+clib_error_t * pcap_read (pcap_main_t * pm);
+
+/**
+ * @brief Add packet
+ *
+ * @param *pm - pcap_main_t
+ * @param time_now - f64
+ * @param n_bytes_in_trace - u32
+ * @param n_bytes_in_packet - u32
+ *
+ * @return Packet Data
+ *
+ */
+static inline void *
+pcap_add_packet (pcap_main_t * pm,
+ f64 time_now,
+ u32 n_bytes_in_trace,
+ u32 n_bytes_in_packet)
+{
+ pcap_packet_header_t * h;
+ u8 * d;
+
+ vec_add2 (pm->pcap_data, d, sizeof (h[0]) + n_bytes_in_trace);
+ h = (void *) (d);
+ h->time_in_sec = time_now;
+ h->time_in_usec = 1e6*(time_now - h->time_in_sec);
+ h->n_packet_bytes_stored_in_file = n_bytes_in_trace;
+ h->n_bytes_in_packet = n_bytes_in_packet;
+ pm->n_packets_captured++;
+ return h->data;
+}
+
+/**
+ * @brief Add buffer (vlib_buffer_t) to the trace
+ *
+ * @param *pm - pcap_main_t
+ * @param *vm - vlib_main_t
+ * @param buffer_index - u32
+ * @param n_bytes_in_trace - u32
+ *
+ */
+static inline void
+pcap_add_buffer (pcap_main_t * pm,
+ vlib_main_t * vm, u32 buffer_index,
+ u32 n_bytes_in_trace)
+{
+ vlib_buffer_t * b = vlib_get_buffer (vm, buffer_index);
+ u32 n = vlib_buffer_length_in_chain (vm, b);
+ i32 n_left = clib_min (n_bytes_in_trace, n);
+ f64 time_now = vlib_time_now (vm);
+ void * d;
+
+ d = pcap_add_packet (pm, time_now, n_left, n);
+ while (1)
+ {
+ u32 copy_length = clib_min ((u32) n_left, b->current_length);
+ clib_memcpy (d, b->data + b->current_data, copy_length);
+ n_left -= b->current_length;
+ if (n_left <= 0)
+ break;
+ d += b->current_length;
+ ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
+ b = vlib_get_buffer (vm, b->next_buffer);
+ }
+
+ /** Flush output vector. */
+ if (vec_len (pm->pcap_data) >= 64*1024
+ || pm->n_packets_captured >= pm->n_packets_to_capture)
+ pcap_write (pm);
+}
+
+#endif /* included_vnet_pcap_h */
diff --git a/src/vnet/unix/pcap2pg.c b/src/vnet/unix/pcap2pg.c
new file mode 100644
index 00000000000..217a61f4cb4
--- /dev/null
+++ b/src/vnet/unix/pcap2pg.c
@@ -0,0 +1,182 @@
+/*
+ * pcap2pg.c: convert pcap input to pg input
+ *
+ * Copyright (c) 2013 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 Functions to convert PCAP file format to VPP PG (Packet Generator)
+ *
+ */
+#include <vnet/unix/pcap.h>
+#include <vnet/ethernet/packet.h>
+#include <stdio.h>
+
+pcap_main_t pcap_main;
+
+/**
+ * @brief char * to seed a PG file
+ */
+static char * pg_fmt =
+ "packet-generator new {\n"
+ " name s%d\n"
+ " limit 1\n"
+ " size %d-%d\n"
+ " node ethernet-input\n";
+
+
+/**
+ * @brief Packet Generator Stream boilerplate
+ *
+ * @param *ofp - FILE
+ * @param i - int
+ * @param *pkt - u8
+ */
+void stream_boilerplate (FILE *ofp, int i, u8 * pkt)
+{
+ fformat(ofp, pg_fmt, i, vec_len(pkt), vec_len(pkt));
+}
+
+/**
+ * @brief Conversion of PCAP file to PG file format
+ *
+ * @param *pm - pcap_main_t
+ * @param *ofp - FILE
+ *
+ * @return rc - int
+ *
+ */
+int pcap2pg (pcap_main_t * pm, FILE *ofp)
+{
+ int i, j;
+ u8 *pkt;
+
+ for (i = 0; i < vec_len (pm->packets_read); i++)
+ {
+ int offset;
+ ethernet_header_t * h;
+ u64 ethertype;
+
+ pkt = pm->packets_read[i];
+ h = (ethernet_header_t *)pkt;
+
+ stream_boilerplate (ofp, i, pkt);
+
+ fformat (ofp, " data {\n");
+
+ ethertype = clib_net_to_host_u16 (h->type);
+
+ /**
+ * In vnet terms, packet generator interfaces are not ethernets.
+ * They don't have vlan tables.
+ * This transforms captured 802.1q VLAN packets into
+ * regular Ethernet packets.
+ */
+ if (ethertype == 0x8100 /* 802.1q vlan */)
+ {
+ u16 * vlan_ethertype = (u16 *)(h+1);
+ ethertype = clib_net_to_host_u16(vlan_ethertype[0]);
+ offset = 18;
+ }
+ else
+ offset = 14;
+
+ fformat (ofp,
+ " 0x%04x: %02x%02x.%02x%02x.%02x%02x"
+ " -> %02x%02x.%02x%02x.%02x%02x\n",
+ ethertype,
+ h->src_address[0],
+ h->src_address[1],
+ h->src_address[2],
+ h->src_address[3],
+ h->src_address[4],
+ h->src_address[5],
+ h->dst_address[0],
+ h->dst_address[1],
+ h->dst_address[2],
+ h->dst_address[3],
+ h->dst_address[4],
+ h->dst_address[5]);
+
+ fformat (ofp, " hex 0x");
+
+ for (j = offset; j < vec_len (pkt); j++)
+ fformat (ofp, "%02x", pkt[j]);
+
+ fformat (ofp, " }\n");
+ fformat (ofp, "}\n\n");
+ }
+ return 0;
+}
+
+/**
+ * @brief pcap2pg.
+ * usage: pcap2pg -i <input-file> [-o <output-file>]
+ */
+int main (int argc, char **argv)
+{
+ unformat_input_t input;
+ pcap_main_t * pm = &pcap_main;
+ u8 * input_file = 0, * output_file = 0;
+ FILE * ofp;
+ clib_error_t * error;
+
+ unformat_init_command_line (&input, argv);
+
+ while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat(&input, "-i %s", &input_file)
+ || unformat (&input, "input %s", &input_file))
+ ;
+ else if (unformat (&input, "-o %s", &output_file)
+ || unformat (&input, "output %s", &output_file))
+ ;
+ else
+ {
+ usage:
+ fformat(stderr,
+ "usage: pcap2pg -i <input-file> [-o <output-file>]\n");
+ exit (1);
+ }
+ }
+
+ if (input_file == 0)
+ goto usage;
+
+ pm->file_name = (char *)input_file;
+ error = pcap_read (pm);
+
+ if (error)
+ {
+ clib_error_report (error);
+ exit (1);
+ }
+
+ if (output_file)
+ {
+ ofp = fopen ((char *)output_file, "rw");
+ if (ofp == NULL)
+ clib_unix_warning ("Couldn't create '%s'", output_file);
+ exit (1);
+ }
+ else
+ {
+ ofp = stdout;
+ }
+
+ pcap2pg (pm, ofp);
+
+ fclose (ofp);
+ exit (0);
+}
diff --git a/src/vnet/unix/tap.api b/src/vnet/unix/tap.api
new file mode 100644
index 00000000000..9b16eadbf86
--- /dev/null
+++ b/src/vnet/unix/tap.api
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2015-2016 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
+
+ This file defines vpe control-plane API messages for
+ the Linux kernel TAP device driver
+*/
+
+/** \brief Initialize a new tap interface with the given paramters
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param use_random_mac - let the system generate a unique mac address
+ @param tap_name - name to associate with the new interface
+ @param mac_address - mac addr to assign to the interface if use_radom not set
+*/
+define tap_connect
+{
+ u32 client_index;
+ u32 context;
+ u8 use_random_mac;
+ u8 tap_name[64];
+ u8 mac_address[6];
+ u8 renumber;
+ u32 custom_dev_instance;
+ u8 tag[64];
+};
+
+/** \brief Reply for tap connect request
+ @param context - returned sender context, to match reply w/ request
+ @param retval - return code
+ @param sw_if_index - software index allocated for the new tap interface
+*/
+define tap_connect_reply
+{
+ u32 context;
+ i32 retval;
+ u32 sw_if_index;
+};
+
+/** \brief Modify a tap interface with the given paramters
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param sw_if_index - interface index of existing tap interface
+ @param use_random_mac - let the system generate a unique mac address
+ @param tap_name - name to associate with the new interface
+ @param mac_address - mac addr to assign to the interface if use_radom not set
+*/
+define tap_modify
+{
+ u32 client_index;
+ u32 context;
+ u32 sw_if_index;
+ u8 use_random_mac;
+ u8 tap_name[64];
+ u8 mac_address[6];
+ u8 renumber;
+ u32 custom_dev_instance;
+};
+
+/** \brief Reply for tap modify request
+ @param context - returned sender context, to match reply w/ request
+ @param retval - return code
+ @param sw_if_index - software index if the modified tap interface
+*/
+define tap_modify_reply
+{
+ u32 context;
+ i32 retval;
+ u32 sw_if_index;
+};
+
+/** \brief Delete tap interface
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param sw_if_index - interface index of existing tap interface
+*/
+define tap_delete
+{
+ u32 client_index;
+ u32 context;
+ u32 sw_if_index;
+};
+
+/** \brief Reply for tap delete request
+ @param context - returned sender context, to match reply w/ request
+ @param retval - return code
+*/
+define tap_delete_reply
+{
+ u32 context;
+ i32 retval;
+};
+
+/** \brief Dump tap interfaces request */
+define sw_interface_tap_dump
+{
+ u32 client_index;
+ u32 context;
+};
+
+/** \brief Reply for tap dump request
+ @param sw_if_index - software index of tap interface
+ @param dev_name - Linux tap device name
+*/
+define sw_interface_tap_details
+{
+ u32 context;
+ u32 sw_if_index;
+ u8 dev_name[64];
+};
diff --git a/src/vnet/unix/tap_api.c b/src/vnet/unix/tap_api.c
new file mode 100644
index 00000000000..99b79ba2e70
--- /dev/null
+++ b/src/vnet/unix/tap_api.c
@@ -0,0 +1,257 @@
+/*
+ *------------------------------------------------------------------
+ * tap_api.c - vnet tap device driver API support
+ *
+ * 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.
+ *------------------------------------------------------------------
+ */
+
+#include <vnet/vnet.h>
+#include <vlibmemory/api.h>
+
+#include <vnet/interface.h>
+#include <vnet/api_errno.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/unix/tuntap.h>
+#include <vnet/unix/tapcli.h>
+
+#include <vnet/vnet_msg_enum.h>
+
+#define vl_typedefs /* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun /* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+#define foreach_tap_api_msg \
+_(TAP_CONNECT, tap_connect) \
+_(TAP_MODIFY, tap_modify) \
+_(TAP_DELETE, tap_delete) \
+_(SW_INTERFACE_TAP_DUMP, sw_interface_tap_dump)
+
+#define vl_msg_name_crc_list
+#include <vnet/unix/tap.api.h>
+#undef vl_msg_name_crc_list
+
+/*
+ * WARNING: replicated pending api refactor completion
+ */
+static void
+send_sw_interface_flags_deleted (vpe_api_main_t * am,
+ unix_shared_memory_queue_t * q,
+ u32 sw_if_index)
+{
+ vl_api_sw_interface_set_flags_t *mp;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_SET_FLAGS);
+ mp->sw_if_index = ntohl (sw_if_index);
+
+ mp->admin_up_down = 0;
+ mp->link_up_down = 0;
+ mp->deleted = 1;
+ vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+static void
+vl_api_tap_connect_t_handler (vl_api_tap_connect_t * mp)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ int rv;
+ vl_api_tap_connect_reply_t *rmp;
+ vnet_main_t *vnm = vnet_get_main ();
+ unix_shared_memory_queue_t *q;
+ u32 sw_if_index = (u32) ~ 0;
+ u8 *tag;
+
+ rv = vnet_tap_connect_renumber (vm, mp->tap_name,
+ mp->use_random_mac ? 0 : mp->mac_address,
+ &sw_if_index, mp->renumber,
+ ntohl (mp->custom_dev_instance));
+
+ /* Add tag if supplied */
+ if (rv == 0 && mp->tag[0])
+ {
+ mp->tag[ARRAY_LEN (mp->tag) - 1] = 0;
+ tag = format (0, "%s%c", mp->tag, 0);
+ vnet_set_sw_interface_tag (vnm, tag, sw_if_index);
+ }
+
+ q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (!q)
+ return;
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_TAP_CONNECT_REPLY);
+ rmp->context = mp->context;
+ rmp->retval = ntohl (rv);
+ rmp->sw_if_index = ntohl (sw_if_index);
+
+ vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_tap_modify_t_handler (vl_api_tap_modify_t * mp)
+{
+ int rv;
+ vl_api_tap_modify_reply_t *rmp;
+ unix_shared_memory_queue_t *q;
+ u32 sw_if_index = (u32) ~ 0;
+ vlib_main_t *vm = vlib_get_main ();
+
+ rv = vnet_tap_modify (vm, ntohl (mp->sw_if_index), mp->tap_name,
+ mp->use_random_mac ? 0 : mp->mac_address,
+ &sw_if_index, mp->renumber,
+ ntohl (mp->custom_dev_instance));
+
+ q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (!q)
+ return;
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_TAP_MODIFY_REPLY);
+ rmp->context = mp->context;
+ rmp->retval = ntohl (rv);
+ rmp->sw_if_index = ntohl (sw_if_index);
+
+ vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_tap_delete_t_handler (vl_api_tap_delete_t * mp)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ int rv;
+ vpe_api_main_t *vam = &vpe_api_main;
+ vl_api_tap_delete_reply_t *rmp;
+ unix_shared_memory_queue_t *q;
+ u32 sw_if_index = ntohl (mp->sw_if_index);
+
+ rv = vnet_tap_delete (vm, sw_if_index);
+ if (!rv)
+ {
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_clear_sw_interface_tag (vnm, sw_if_index);
+ }
+
+ q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (!q)
+ return;
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_TAP_DELETE_REPLY);
+ rmp->context = mp->context;
+ rmp->retval = ntohl (rv);
+
+ vl_msg_api_send_shmem (q, (u8 *) & rmp);
+
+ if (!rv)
+ send_sw_interface_flags_deleted (vam, q, sw_if_index);
+}
+
+static void
+send_sw_interface_tap_details (vpe_api_main_t * am,
+ unix_shared_memory_queue_t * q,
+ tapcli_interface_details_t * tap_if,
+ u32 context)
+{
+ vl_api_sw_interface_tap_details_t *mp;
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_TAP_DETAILS);
+ mp->sw_if_index = ntohl (tap_if->sw_if_index);
+ strncpy ((char *) mp->dev_name,
+ (char *) tap_if->dev_name, ARRAY_LEN (mp->dev_name) - 1);
+ mp->context = context;
+
+ vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+static void
+vl_api_sw_interface_tap_dump_t_handler (vl_api_sw_interface_tap_dump_t * mp)
+{
+ int rv = 0;
+ vpe_api_main_t *am = &vpe_api_main;
+ unix_shared_memory_queue_t *q;
+ tapcli_interface_details_t *tapifs = NULL;
+ tapcli_interface_details_t *tap_if = NULL;
+
+ q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (q == 0)
+ return;
+
+ rv = vnet_tap_dump_ifs (&tapifs);
+ if (rv)
+ return;
+
+ vec_foreach (tap_if, tapifs)
+ {
+ send_sw_interface_tap_details (am, q, tap_if, mp->context);
+ }
+
+ vec_free (tapifs);
+}
+
+static void
+setup_message_id_table (api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
+ foreach_vl_msg_name_crc_tap;
+#undef _
+}
+
+static clib_error_t *
+tap_api_hookup (vlib_main_t * vm)
+{
+ api_main_t *am = &api_main;
+
+#define _(N,n) \
+ vl_msg_api_set_handlers(VL_API_##N, #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_tap_api_msg;
+#undef _
+
+ /*
+ * Set up the (msg_name, crc, message-id) table
+ */
+ setup_message_id_table (am);
+
+ return 0;
+}
+
+VLIB_API_INIT_FUNCTION (tap_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/unix/tapcli.c b/src/vnet/unix/tapcli.c
new file mode 100644
index 00000000000..9862a2bda50
--- /dev/null
+++ b/src/vnet/unix/tapcli.c
@@ -0,0 +1,1328 @@
+/*
+ *------------------------------------------------------------------
+ * tapcli.c - dynamic tap interface hookup
+ *
+ * Copyright (c) 2009 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 dynamic tap interface hookup
+ */
+
+#include <fcntl.h> /* for open */
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h> /* for iovec */
+#include <netinet/in.h>
+
+#include <linux/if_arp.h>
+#include <linux/if_tun.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+
+#include <vnet/ip/ip.h>
+
+#include <vnet/ethernet/ethernet.h>
+
+#include <vnet/feature/feature.h>
+#include <vnet/devices/devices.h>
+#include <vnet/unix/tapcli.h>
+
+static vnet_device_class_t tapcli_dev_class;
+static vnet_hw_interface_class_t tapcli_interface_class;
+static vlib_node_registration_t tapcli_rx_node;
+
+static void tapcli_nopunt_frame (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame);
+/**
+ * @brief Struct for the tapcli interface
+ */
+typedef struct {
+ u32 unix_fd;
+ u32 unix_file_index;
+ u32 provision_fd;
+ /** For counters */
+ u32 sw_if_index;
+ u32 hw_if_index;
+ u32 is_promisc;
+ struct ifreq ifr;
+ u32 per_interface_next_index;
+ /** for delete */
+ u8 active;
+} tapcli_interface_t;
+
+/**
+ * @brief Struct for RX trace
+ */
+typedef struct {
+ u16 sw_if_index;
+} tapcli_rx_trace_t;
+
+/**
+ * @brief Function to format TAP CLI trace
+ *
+ * @param *s - u8 - formatting string
+ * @param *va - va_list
+ *
+ * @return *s - u8 - formatted string
+ *
+ */
+u8 * format_tapcli_rx_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();
+ tapcli_rx_trace_t * t = va_arg (*va, tapcli_rx_trace_t *);
+ s = format (s, "%U", format_vnet_sw_if_index_name,
+ vnm, t->sw_if_index);
+ return s;
+}
+
+/**
+ * @brief TAPCLI main state struct
+ */
+typedef struct {
+ /** Vector of iovecs for readv/writev calls. */
+ struct iovec * iovecs;
+
+ /** Vector of VLIB rx buffers to use. We allocate them in blocks
+ of VLIB_FRAME_SIZE (256). */
+ u32 * rx_buffers;
+
+ /** tap device destination MAC address. Required, or Linux drops pkts */
+ u8 ether_dst_mac[6];
+
+ /** Interface MTU in bytes and # of default sized buffers. */
+ u32 mtu_bytes, mtu_buffers;
+
+ /** Vector of tap interfaces */
+ tapcli_interface_t * tapcli_interfaces;
+
+ /** Vector of deleted tap interfaces */
+ u32 * tapcli_inactive_interfaces;
+
+ /** Bitmap of tap interfaces with pending reads */
+ uword * pending_read_bitmap;
+
+ /** Hash table to find tapcli interface given hw_if_index */
+ uword * tapcli_interface_index_by_sw_if_index;
+
+ /** Hash table to find tapcli interface given unix fd */
+ uword * tapcli_interface_index_by_unix_fd;
+
+ /** renumbering table */
+ u32 * show_dev_instance_by_real_dev_instance;
+
+ /** 1 => disable CLI */
+ int is_disabled;
+
+ /** convenience - vlib_main_t */
+ vlib_main_t * vlib_main;
+ /** convenience - vnet_main_t */
+ vnet_main_t * vnet_main;
+ /** convenience - unix_main_t */
+ unix_main_t * unix_main;
+} tapcli_main_t;
+
+static tapcli_main_t tapcli_main;
+
+/**
+ * @brief tapcli TX node function
+ * @node tap-cli-tx
+ *
+ * Output node, writes the buffers comprising the incoming frame
+ * to the tun/tap device, aka hands them to the Linux kernel stack.
+ *
+ * @param *vm - vlib_main_t
+ * @param *node - vlib_node_runtime_t
+ * @param *frame - vlib_frame_t
+ *
+ * @return n_packets - uword
+ *
+ */
+static uword
+tapcli_tx (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 * buffers = vlib_frame_args (frame);
+ uword n_packets = frame->n_vectors;
+ tapcli_main_t * tm = &tapcli_main;
+ tapcli_interface_t * ti;
+ int i;
+
+ for (i = 0; i < n_packets; i++)
+ {
+ struct iovec * iov;
+ vlib_buffer_t * b;
+ uword l;
+ vnet_hw_interface_t * hw;
+ uword * p;
+ u32 tx_sw_if_index;
+
+ b = vlib_get_buffer (vm, buffers[i]);
+
+ tx_sw_if_index = vnet_buffer(b)->sw_if_index[VLIB_TX];
+ if (tx_sw_if_index == (u32)~0)
+ tx_sw_if_index = vnet_buffer(b)->sw_if_index[VLIB_RX];
+
+ ASSERT(tx_sw_if_index != (u32)~0);
+
+ /* Use the sup intfc to finesse vlan subifs */
+ hw = vnet_get_sup_hw_interface (tm->vnet_main, tx_sw_if_index);
+ tx_sw_if_index = hw->sw_if_index;
+
+ p = hash_get (tm->tapcli_interface_index_by_sw_if_index,
+ tx_sw_if_index);
+ if (p == 0)
+ {
+ clib_warning ("sw_if_index %d unknown", tx_sw_if_index);
+ /* $$$ leak, but this should never happen... */
+ continue;
+ }
+ else
+ ti = vec_elt_at_index (tm->tapcli_interfaces, p[0]);
+
+ /* Re-set iovecs if present. */
+ if (tm->iovecs)
+ _vec_len (tm->iovecs) = 0;
+
+ /* VLIB buffer chain -> Unix iovec(s). */
+ vec_add2 (tm->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 (tm->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);
+ }
+
+ if (writev (ti->unix_fd, tm->iovecs, vec_len (tm->iovecs)) < l)
+ clib_unix_warning ("writev");
+ }
+
+ vlib_buffer_free(vm, vlib_frame_vector_args(frame), frame->n_vectors);
+
+ return n_packets;
+}
+
+VLIB_REGISTER_NODE (tapcli_tx_node,static) = {
+ .function = tapcli_tx,
+ .name = "tapcli-tx",
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .vector_size = 4,
+};
+
+/**
+ * @brief Dispatch tapcli RX node function for node tap_cli_rx
+ *
+ *
+ * @param *vm - vlib_main_t
+ * @param *node - vlib_node_runtime_t
+ * @param *ti - tapcli_interface_t
+ *
+ * @return n_packets - uword
+ *
+ */
+static uword tapcli_rx_iface(vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ tapcli_interface_t * ti)
+{
+ tapcli_main_t * tm = &tapcli_main;
+ const uword buffer_size = VLIB_BUFFER_DATA_SIZE;
+ u32 n_trace = vlib_get_trace_count (vm, node);
+ u8 set_trace = 0;
+
+ vnet_main_t *vnm;
+ vnet_sw_interface_t * si;
+ u8 admin_down;
+ u32 next = node->cached_next_index;
+ u32 n_left_to_next, next_index;
+ u32 *to_next;
+
+ vnm = vnet_get_main();
+ si = vnet_get_sw_interface (vnm, ti->sw_if_index);
+ admin_down = !(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP);
+
+ vlib_get_next_frame(vm, node, next, to_next, n_left_to_next);
+
+ while (n_left_to_next) { // Fill at most one vector
+ vlib_buffer_t *b_first, *b, *prev;
+ u32 bi_first, bi;
+ word n_bytes_in_packet;
+ int j, n_bytes_left;
+
+ if (PREDICT_FALSE(vec_len(tm->rx_buffers) < tm->mtu_buffers)) {
+ uword len = vec_len(tm->rx_buffers);
+ _vec_len(tm->rx_buffers) +=
+ vlib_buffer_alloc_from_free_list(vm, &tm->rx_buffers[len],
+ VLIB_FRAME_SIZE - len, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+ if (PREDICT_FALSE(vec_len(tm->rx_buffers) < tm->mtu_buffers)) {
+ vlib_node_increment_counter(vm, tapcli_rx_node.index,
+ TAPCLI_ERROR_BUFFER_ALLOC,
+ tm->mtu_buffers - vec_len(tm->rx_buffers));
+ break;
+ }
+ }
+
+ uword i_rx = vec_len (tm->rx_buffers) - 1;
+
+ /* Allocate RX buffers from end of rx_buffers.
+ Turn them into iovecs to pass to readv. */
+ vec_validate (tm->iovecs, tm->mtu_buffers - 1);
+ for (j = 0; j < tm->mtu_buffers; j++) {
+ b = vlib_get_buffer (vm, tm->rx_buffers[i_rx - j]);
+ tm->iovecs[j].iov_base = b->data;
+ tm->iovecs[j].iov_len = buffer_size;
+ }
+
+ n_bytes_left = readv (ti->unix_fd, tm->iovecs, tm->mtu_buffers);
+ n_bytes_in_packet = n_bytes_left;
+ if (n_bytes_left <= 0) {
+ if (errno != EAGAIN) {
+ vlib_node_increment_counter(vm, tapcli_rx_node.index,
+ TAPCLI_ERROR_READ, 1);
+ }
+ break;
+ }
+
+ bi_first = tm->rx_buffers[i_rx];
+ b = b_first = vlib_get_buffer (vm, tm->rx_buffers[i_rx]);
+ prev = NULL;
+
+ while (1) {
+ b->current_length = n_bytes_left < buffer_size ? n_bytes_left : buffer_size;
+ n_bytes_left -= buffer_size;
+
+ if (prev) {
+ prev->next_buffer = bi;
+ prev->flags |= VLIB_BUFFER_NEXT_PRESENT;
+ }
+ prev = b;
+
+ /* last segment */
+ if (n_bytes_left <= 0)
+ break;
+
+ i_rx--;
+ bi = tm->rx_buffers[i_rx];
+ b = vlib_get_buffer (vm, bi);
+ }
+
+ _vec_len (tm->rx_buffers) = i_rx;
+
+ b_first->total_length_not_including_first_buffer =
+ (n_bytes_in_packet > buffer_size) ? n_bytes_in_packet - buffer_size : 0;
+ b_first->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b_first);
+
+ vnet_buffer (b_first)->sw_if_index[VLIB_RX] = ti->sw_if_index;
+ vnet_buffer (b_first)->sw_if_index[VLIB_TX] = (u32)~0;
+
+ b_first->error = node->errors[TAPCLI_ERROR_NONE];
+ next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+ next_index = (ti->per_interface_next_index != ~0) ?
+ ti->per_interface_next_index : next_index;
+ next_index = admin_down ? VNET_DEVICE_INPUT_NEXT_DROP : next_index;
+
+ to_next[0] = bi_first;
+ to_next++;
+ n_left_to_next--;
+
+ vnet_feature_start_device_input_x1 (ti->sw_if_index, &next_index,
+ b_first, 0);
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next,
+ to_next, n_left_to_next,
+ bi_first, next_index);
+
+ /* Interface counters for tapcli interface. */
+ if (PREDICT_TRUE(!admin_down)) {
+ vlib_increment_combined_counter (
+ vnet_main.interface_main.combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX,
+ os_get_cpu_number(), ti->sw_if_index,
+ 1, n_bytes_in_packet);
+
+ if (PREDICT_FALSE(n_trace > 0)) {
+ vlib_trace_buffer (vm, node, next_index,
+ b_first, /* follow_chain */ 1);
+ n_trace--;
+ set_trace = 1;
+ tapcli_rx_trace_t *t0 = vlib_add_trace (vm, node, b_first, sizeof (*t0));
+ t0->sw_if_index = si->sw_if_index;
+ }
+ }
+ }
+ vlib_put_next_frame (vm, node, next, n_left_to_next);
+ if (set_trace)
+ vlib_set_trace_count (vm, node, n_trace);
+ return VLIB_FRAME_SIZE - n_left_to_next;
+}
+
+/**
+ * @brief tapcli RX node function
+ * @node tap-cli-rx
+ *
+ * Input node from the Kernel tun/tap device
+ *
+ * @param *vm - vlib_main_t
+ * @param *node - vlib_node_runtime_t
+ * @param *frame - vlib_frame_t
+ *
+ * @return n_packets - uword
+ *
+ */
+static uword
+tapcli_rx (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ tapcli_main_t * tm = &tapcli_main;
+ static u32 * ready_interface_indices;
+ tapcli_interface_t * ti;
+ int i;
+ u32 total_count = 0;
+
+ vec_reset_length (ready_interface_indices);
+ clib_bitmap_foreach (i, tm->pending_read_bitmap,
+ ({
+ vec_add1 (ready_interface_indices, i);
+ }));
+
+ if (vec_len (ready_interface_indices) == 0)
+ return 0;
+
+ for (i = 0; i < vec_len(ready_interface_indices); i++)
+ {
+ tm->pending_read_bitmap =
+ clib_bitmap_set (tm->pending_read_bitmap,
+ ready_interface_indices[i], 0);
+
+ ti = vec_elt_at_index (tm->tapcli_interfaces, ready_interface_indices[i]);
+ total_count += tapcli_rx_iface(vm, node, ti);
+ }
+ return total_count; //This might return more than 256.
+}
+
+/** TAPCLI error strings */
+static char * tapcli_rx_error_strings[] = {
+#define _(sym,string) string,
+ foreach_tapcli_error
+#undef _
+};
+
+VLIB_REGISTER_NODE (tapcli_rx_node, static) = {
+ .function = tapcli_rx,
+ .name = "tapcli-rx",
+ .sibling_of = "device-input",
+ .type = VLIB_NODE_TYPE_INPUT,
+ .state = VLIB_NODE_STATE_INTERRUPT,
+ .vector_size = 4,
+ .n_errors = TAPCLI_N_ERROR,
+ .error_strings = tapcli_rx_error_strings,
+ .format_trace = format_tapcli_rx_trace,
+};
+
+
+/**
+ * @brief Gets called when file descriptor is ready from epoll.
+ *
+ * @param *uf - unix_file_t
+ *
+ * @return error - clib_error_t
+ *
+ */
+static clib_error_t * tapcli_read_ready (unix_file_t * uf)
+{
+ vlib_main_t * vm = vlib_get_main();
+ tapcli_main_t * tm = &tapcli_main;
+ uword * p;
+
+ /** Schedule the rx node */
+ vlib_node_set_interrupt_pending (vm, tapcli_rx_node.index);
+
+ p = hash_get (tm->tapcli_interface_index_by_unix_fd, uf->file_descriptor);
+
+ /** Mark the specific tap interface ready-to-read */
+ if (p)
+ tm->pending_read_bitmap = clib_bitmap_set (tm->pending_read_bitmap,
+ p[0], 1);
+ else
+ clib_warning ("fd %d not in hash table", uf->file_descriptor);
+
+ return 0;
+}
+
+/**
+ * @brief CLI function for TAPCLI configuration
+ *
+ * @param *vm - vlib_main_t
+ * @param *input - unformat_input_t
+ *
+ * @return error - clib_error_t
+ *
+ */
+static clib_error_t *
+tapcli_config (vlib_main_t * vm, unformat_input_t * input)
+{
+ tapcli_main_t *tm = &tapcli_main;
+ const uword buffer_size = VLIB_BUFFER_DATA_SIZE;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "mtu %d", &tm->mtu_bytes))
+ ;
+ else if (unformat (input, "disable"))
+ tm->is_disabled = 1;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+
+ if (tm->is_disabled)
+ return 0;
+
+ if (geteuid())
+ {
+ clib_warning ("tapcli disabled: must be superuser");
+ tm->is_disabled = 1;
+ return 0;
+ }
+
+ tm->mtu_buffers = (tm->mtu_bytes + (buffer_size - 1)) / buffer_size;
+
+ return 0;
+}
+
+/**
+ * @brief Renumber TAPCLI interface
+ *
+ * @param *hi - vnet_hw_interface_t
+ * @param new_dev_instance - u32
+ *
+ * @return rc - int
+ *
+ */
+static int tap_name_renumber (vnet_hw_interface_t * hi,
+ u32 new_dev_instance)
+{
+ tapcli_main_t *tm = &tapcli_main;
+
+ vec_validate_init_empty (tm->show_dev_instance_by_real_dev_instance,
+ hi->dev_instance, ~0);
+
+ tm->show_dev_instance_by_real_dev_instance [hi->dev_instance] =
+ new_dev_instance;
+
+ return 0;
+}
+
+VLIB_CONFIG_FUNCTION (tapcli_config, "tapcli");
+
+/**
+ * @brief Free "no punt" frame
+ *
+ * @param *vm - vlib_main_t
+ * @param *node - vlib_node_runtime_t
+ * @param *frame - vlib_frame_t
+ *
+ */
+static void
+tapcli_nopunt_frame (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 * buffers = vlib_frame_args (frame);
+ uword n_packets = frame->n_vectors;
+ vlib_buffer_free (vm, buffers, n_packets);
+ vlib_frame_free (vm, node, frame);
+}
+
+VNET_HW_INTERFACE_CLASS (tapcli_interface_class,static) = {
+ .name = "tapcli",
+ .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
+};
+
+/**
+ * @brief Formatter for TAPCLI interface name
+ *
+ * @param *s - formatter string
+ * @param *args - va_list
+ *
+ * @return *s - formatted string
+ *
+ */
+static u8 * format_tapcli_interface_name (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+ u32 show_dev_instance = ~0;
+ tapcli_main_t * tm = &tapcli_main;
+
+ if (i < vec_len (tm->show_dev_instance_by_real_dev_instance))
+ show_dev_instance = tm->show_dev_instance_by_real_dev_instance[i];
+
+ if (show_dev_instance != ~0)
+ i = show_dev_instance;
+
+ s = format (s, "tap-%d", i);
+ return s;
+}
+
+/**
+ * @brief Modify interface flags for TAPCLI interface
+ *
+ * @param *vnm - vnet_main_t
+ * @param *hw - vnet_hw_interface_t
+ * @param flags - u32
+ *
+ * @return rc - u32
+ *
+ */
+static u32 tapcli_flag_change (vnet_main_t * vnm,
+ vnet_hw_interface_t * hw,
+ u32 flags)
+{
+ tapcli_main_t *tm = &tapcli_main;
+ tapcli_interface_t *ti;
+
+ ti = vec_elt_at_index (tm->tapcli_interfaces, hw->dev_instance);
+
+ if (flags & ETHERNET_INTERFACE_FLAG_MTU)
+ {
+ const uword buffer_size = VLIB_BUFFER_DATA_SIZE;
+ tm->mtu_bytes = hw->max_packet_bytes;
+ tm->mtu_buffers = (tm->mtu_bytes + (buffer_size - 1)) / buffer_size;
+ }
+ else
+ {
+ struct ifreq ifr;
+ u32 want_promisc;
+
+ memcpy (&ifr, &ti->ifr, sizeof (ifr));
+
+ /* get flags, modify to bring up interface... */
+ if (ioctl (ti->provision_fd, SIOCGIFFLAGS, &ifr) < 0)
+ {
+ clib_unix_warning ("Couldn't get interface flags for %s", hw->name);
+ return 0;
+ }
+
+ want_promisc = (flags & ETHERNET_INTERFACE_FLAG_ACCEPT_ALL) != 0;
+
+ if (want_promisc == ti->is_promisc)
+ return 0;
+
+ if (flags & ETHERNET_INTERFACE_FLAG_ACCEPT_ALL)
+ ifr.ifr_flags |= IFF_PROMISC;
+ else
+ ifr.ifr_flags &= ~(IFF_PROMISC);
+
+ /* get flags, modify to bring up interface... */
+ if (ioctl (ti->provision_fd, SIOCSIFFLAGS, &ifr) < 0)
+ {
+ clib_unix_warning ("Couldn't set interface flags for %s", hw->name);
+ return 0;
+ }
+
+ ti->is_promisc = want_promisc;
+ }
+
+ return 0;
+}
+
+/**
+ * @brief Setting the TAP interface's next processing node
+ *
+ * @param *vnm - vnet_main_t
+ * @param hw_if_index - u32
+ * @param node_index - u32
+ *
+ */
+static void tapcli_set_interface_next_node (vnet_main_t *vnm,
+ u32 hw_if_index,
+ u32 node_index)
+{
+ tapcli_main_t *tm = &tapcli_main;
+ tapcli_interface_t *ti;
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+
+ ti = vec_elt_at_index (tm->tapcli_interfaces, hw->dev_instance);
+
+ /** Shut off redirection */
+ if (node_index == ~0)
+ {
+ ti->per_interface_next_index = node_index;
+ return;
+ }
+
+ ti->per_interface_next_index =
+ vlib_node_add_next (tm->vlib_main, tapcli_rx_node.index, node_index);
+}
+
+/**
+ * @brief Set link_state == admin_state otherwise things like ip6 neighbor discovery breaks
+ *
+ * @param *vnm - vnet_main_t
+ * @param hw_if_index - u32
+ * @param flags - u32
+ *
+ * @return error - clib_error_t
+ */
+static clib_error_t *
+tapcli_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+ uword is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+ u32 hw_flags;
+ u32 speed_duplex = VNET_HW_INTERFACE_FLAG_FULL_DUPLEX
+ | VNET_HW_INTERFACE_FLAG_SPEED_1G;
+
+ if (is_admin_up)
+ hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP | speed_duplex;
+ else
+ hw_flags = speed_duplex;
+
+ vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
+ return 0;
+}
+
+VNET_DEVICE_CLASS (tapcli_dev_class,static) = {
+ .name = "tapcli",
+ .tx_function = tapcli_tx,
+ .format_device_name = format_tapcli_interface_name,
+ .rx_redirect_to_node = tapcli_set_interface_next_node,
+ .name_renumber = tap_name_renumber,
+ .admin_up_down_function = tapcli_interface_admin_up_down,
+};
+
+/**
+ * @brief Dump TAP interfaces
+ *
+ * @param **out_tapids - tapcli_interface_details_t
+ *
+ * @return rc - int
+ *
+ */
+int vnet_tap_dump_ifs (tapcli_interface_details_t **out_tapids)
+{
+ tapcli_main_t * tm = &tapcli_main;
+ tapcli_interface_t * ti;
+
+ tapcli_interface_details_t * r_tapids = NULL;
+ tapcli_interface_details_t * tapid = NULL;
+
+ vec_foreach (ti, tm->tapcli_interfaces) {
+ if (!ti->active)
+ continue;
+ vec_add2(r_tapids, tapid, 1);
+ tapid->sw_if_index = ti->sw_if_index;
+ strncpy((char *)tapid->dev_name, ti->ifr.ifr_name, sizeof (ti->ifr.ifr_name)-1);
+ }
+
+ *out_tapids = r_tapids;
+
+ return 0;
+}
+
+/**
+ * @brief Get tap interface from inactive interfaces or create new
+ *
+ * @return interface - tapcli_interface_t
+ *
+ */
+static tapcli_interface_t *tapcli_get_new_tapif()
+{
+ tapcli_main_t * tm = &tapcli_main;
+ tapcli_interface_t *ti = NULL;
+
+ int inactive_cnt = vec_len(tm->tapcli_inactive_interfaces);
+ // if there are any inactive ifaces
+ if (inactive_cnt > 0) {
+ // take last
+ u32 ti_idx = tm->tapcli_inactive_interfaces[inactive_cnt - 1];
+ if (vec_len(tm->tapcli_interfaces) > ti_idx) {
+ ti = vec_elt_at_index (tm->tapcli_interfaces, ti_idx);
+ clib_warning("reusing tap interface");
+ }
+ // "remove" from inactive list
+ _vec_len(tm->tapcli_inactive_interfaces) -= 1;
+ }
+
+ // ti was not retrieved from inactive ifaces - create new
+ if (!ti)
+ vec_add2 (tm->tapcli_interfaces, ti, 1);
+
+ return ti;
+}
+
+/**
+ * @brief Connect a TAP interface
+ *
+ * @param vm - vlib_main_t
+ * @param intfc_name - u8
+ * @param hwaddr_arg - u8
+ * @param sw_if_indexp - u32
+ *
+ * @return rc - int
+ *
+ */
+int vnet_tap_connect (vlib_main_t * vm, u8 * intfc_name, u8 *hwaddr_arg,
+ u32 * sw_if_indexp)
+{
+ tapcli_main_t * tm = &tapcli_main;
+ tapcli_interface_t * ti = NULL;
+ struct ifreq ifr;
+ int flags;
+ int dev_net_tun_fd;
+ int dev_tap_fd = -1;
+ clib_error_t * error;
+ u8 hwaddr [6];
+ int rv = 0;
+
+ if (tm->is_disabled)
+ {
+ return VNET_API_ERROR_FEATURE_DISABLED;
+ }
+
+ flags = IFF_TAP | IFF_NO_PI;
+
+ if ((dev_net_tun_fd = open ("/dev/net/tun", O_RDWR)) < 0)
+ return VNET_API_ERROR_SYSCALL_ERROR_1;
+
+ memset (&ifr, 0, sizeof (ifr));
+ strncpy(ifr.ifr_name, (char *) intfc_name, sizeof (ifr.ifr_name)-1);
+ ifr.ifr_flags = flags;
+ if (ioctl (dev_net_tun_fd, TUNSETIFF, (void *)&ifr) < 0)
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_2;
+ goto error;
+ }
+
+ /* Open a provisioning socket */
+ if ((dev_tap_fd = socket(PF_PACKET, SOCK_RAW,
+ htons(ETH_P_ALL))) < 0 )
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_3;
+ goto error;
+ }
+
+ /* Find the interface index. */
+ {
+ struct ifreq ifr;
+ struct sockaddr_ll sll;
+
+ memset (&ifr, 0, sizeof(ifr));
+ strncpy (ifr.ifr_name, (char *) intfc_name, sizeof (ifr.ifr_name)-1);
+ if (ioctl (dev_tap_fd, SIOCGIFINDEX, &ifr) < 0 )
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_4;
+ goto error;
+ }
+
+ /* Bind the provisioning socket to the interface. */
+ memset(&sll, 0, sizeof(sll));
+ sll.sll_family = AF_PACKET;
+ sll.sll_ifindex = ifr.ifr_ifindex;
+ sll.sll_protocol = htons(ETH_P_ALL);
+
+ if (bind(dev_tap_fd, (struct sockaddr*) &sll, sizeof(sll)) < 0)
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_5;
+ goto error;
+ }
+ }
+
+ /* non-blocking I/O on /dev/tapX */
+ {
+ int one = 1;
+ if (ioctl (dev_net_tun_fd, FIONBIO, &one) < 0)
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_6;
+ goto error;
+ }
+ }
+ ifr.ifr_mtu = tm->mtu_bytes;
+ if (ioctl (dev_tap_fd, SIOCSIFMTU, &ifr) < 0)
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_7;
+ goto error;
+ }
+
+ /* get flags, modify to bring up interface... */
+ if (ioctl (dev_tap_fd, SIOCGIFFLAGS, &ifr) < 0)
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_8;
+ goto error;
+ }
+
+ ifr.ifr_flags |= (IFF_UP | IFF_RUNNING);
+
+ if (ioctl (dev_tap_fd, SIOCSIFFLAGS, &ifr) < 0)
+ {
+ rv = VNET_API_ERROR_SYSCALL_ERROR_9;
+ goto error;
+ }
+
+ ti = tapcli_get_new_tapif();
+ ti->per_interface_next_index = ~0;
+
+ if (hwaddr_arg != 0)
+ clib_memcpy(hwaddr, hwaddr_arg, 6);
+ else
+ {
+ f64 now = vlib_time_now(vm);
+ u32 rnd;
+ rnd = (u32) (now * 1e6);
+ rnd = random_u32 (&rnd);
+
+ memcpy (hwaddr+2, &rnd, sizeof(rnd));
+ hwaddr[0] = 2;
+ hwaddr[1] = 0xfe;
+ }
+
+ error = ethernet_register_interface
+ (tm->vnet_main,
+ tapcli_dev_class.index,
+ ti - tm->tapcli_interfaces /* device instance */,
+ hwaddr /* ethernet address */,
+ &ti->hw_if_index,
+ tapcli_flag_change);
+
+ if (error)
+ {
+ clib_error_report (error);
+ rv = VNET_API_ERROR_INVALID_REGISTRATION;
+ goto error;
+ }
+
+ {
+ unix_file_t template = {0};
+ template.read_function = tapcli_read_ready;
+ template.file_descriptor = dev_net_tun_fd;
+ ti->unix_file_index = unix_file_add (&unix_main, &template);
+ ti->unix_fd = dev_net_tun_fd;
+ ti->provision_fd = dev_tap_fd;
+ clib_memcpy (&ti->ifr, &ifr, sizeof (ifr));
+ }
+
+ {
+ vnet_hw_interface_t * hw;
+ hw = vnet_get_hw_interface (tm->vnet_main, ti->hw_if_index);
+ hw->min_supported_packet_bytes = TAP_MTU_MIN;
+ hw->max_supported_packet_bytes = TAP_MTU_MAX;
+ hw->max_l3_packet_bytes[VLIB_RX] = hw->max_l3_packet_bytes[VLIB_TX] = hw->max_supported_packet_bytes - sizeof(ethernet_header_t);
+ ti->sw_if_index = hw->sw_if_index;
+ if (sw_if_indexp)
+ *sw_if_indexp = hw->sw_if_index;
+ }
+
+ ti->active = 1;
+
+ hash_set (tm->tapcli_interface_index_by_sw_if_index, ti->sw_if_index,
+ ti - tm->tapcli_interfaces);
+
+ hash_set (tm->tapcli_interface_index_by_unix_fd, ti->unix_fd,
+ ti - tm->tapcli_interfaces);
+
+ return rv;
+
+ error:
+ close (dev_net_tun_fd);
+ if (dev_tap_fd >= 0)
+ close (dev_tap_fd);
+
+ return rv;
+}
+
+/**
+ * @brief Renumber a TAP interface
+ *
+ * @param *vm - vlib_main_t
+ * @param *intfc_name - u8
+ * @param *hwaddr_arg - u8
+ * @param *sw_if_indexp - u32
+ * @param renumber - u8
+ * @param custom_dev_instance - u32
+ *
+ * @return rc - int
+ *
+ */
+int vnet_tap_connect_renumber (vlib_main_t * vm, u8 * intfc_name,
+ u8 *hwaddr_arg, u32 * sw_if_indexp,
+ u8 renumber, u32 custom_dev_instance)
+{
+ int rv = vnet_tap_connect(vm, intfc_name, hwaddr_arg, sw_if_indexp);
+
+ if (!rv && renumber)
+ vnet_interface_name_renumber (*sw_if_indexp, custom_dev_instance);
+
+ return rv;
+}
+
+/**
+ * @brief Disconnect TAP CLI interface
+ *
+ * @param *ti - tapcli_interface_t
+ *
+ * @return rc - int
+ *
+ */
+static int tapcli_tap_disconnect (tapcli_interface_t *ti)
+{
+ int rv = 0;
+ vnet_main_t * vnm = vnet_get_main();
+ tapcli_main_t * tm = &tapcli_main;
+ u32 sw_if_index = ti->sw_if_index;
+
+ // bring interface down
+ vnet_sw_interface_set_flags (vnm, sw_if_index, 0);
+
+ if (ti->unix_file_index != ~0) {
+ unix_file_del (&unix_main, unix_main.file_pool + ti->unix_file_index);
+ ti->unix_file_index = ~0;
+ }
+ else
+ close(ti->unix_fd);
+
+ hash_unset (tm->tapcli_interface_index_by_unix_fd, ti->unix_fd);
+ hash_unset (tm->tapcli_interface_index_by_sw_if_index, ti->sw_if_index);
+ close(ti->provision_fd);
+ ti->unix_fd = -1;
+ ti->provision_fd = -1;
+
+ return rv;
+}
+
+/**
+ * @brief Delete TAP interface
+ *
+ * @param *vm - vlib_main_t
+ * @param sw_if_index - u32
+ *
+ * @return rc - int
+ *
+ */
+int vnet_tap_delete(vlib_main_t *vm, u32 sw_if_index)
+{
+ int rv = 0;
+ tapcli_main_t * tm = &tapcli_main;
+ tapcli_interface_t *ti;
+ uword *p = NULL;
+
+ p = hash_get (tm->tapcli_interface_index_by_sw_if_index,
+ sw_if_index);
+ if (p == 0) {
+ clib_warning ("sw_if_index %d unknown", sw_if_index);
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+ }
+ ti = vec_elt_at_index (tm->tapcli_interfaces, p[0]);
+
+ // inactive
+ ti->active = 0;
+ tapcli_tap_disconnect(ti);
+ // add to inactive list
+ vec_add1(tm->tapcli_inactive_interfaces, ti - tm->tapcli_interfaces);
+
+ // reset renumbered iface
+ if (p[0] < vec_len (tm->show_dev_instance_by_real_dev_instance))
+ tm->show_dev_instance_by_real_dev_instance[p[0]] = ~0;
+
+ ethernet_delete_interface (tm->vnet_main, ti->hw_if_index);
+ return rv;
+}
+
+/**
+ * @brief CLI function to delete TAP interface
+ *
+ * @param *vm - vlib_main_t
+ * @param *input - unformat_input_t
+ * @param *cmd - vlib_cli_command_t
+ *
+ * @return error - clib_error_t
+ *
+ */
+static clib_error_t *
+tap_delete_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ tapcli_main_t * tm = &tapcli_main;
+ u32 sw_if_index = ~0;
+
+ if (tm->is_disabled)
+ {
+ return clib_error_return (0, "device disabled...");
+ }
+
+ if (unformat (input, "%U", unformat_vnet_sw_interface, tm->vnet_main,
+ &sw_if_index))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+
+
+ int rc = vnet_tap_delete (vm, sw_if_index);
+
+ if (!rc) {
+ vlib_cli_output (vm, "Deleted.");
+ } else {
+ vlib_cli_output (vm, "Error during deletion of tap interface. (rc: %d)", rc);
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (tap_delete_command, static) = {
+ .path = "tap delete",
+ .short_help = "tap delete <vpp-tap-intfc-name>",
+ .function = tap_delete_command_fn,
+};
+
+/**
+ * @brief Modifies tap interface - can result in new interface being created
+ *
+ * @param *vm - vlib_main_t
+ * @param orig_sw_if_index - u32
+ * @param *intfc_name - u8
+ * @param *hwaddr_arg - u8
+ * @param *sw_if_indexp - u32
+ * @param renumber - u8
+ * @param custom_dev_instance - u32
+ *
+ * @return rc - int
+ *
+ */
+int vnet_tap_modify (vlib_main_t * vm, u32 orig_sw_if_index,
+ u8 * intfc_name, u8 *hwaddr_arg,
+ u32 * sw_if_indexp,
+ u8 renumber, u32 custom_dev_instance)
+{
+ int rv = vnet_tap_delete (vm, orig_sw_if_index);
+
+ if (rv)
+ return rv;
+
+ rv = vnet_tap_connect_renumber(vm, intfc_name, hwaddr_arg, sw_if_indexp,
+ renumber, custom_dev_instance);
+
+ return rv;
+}
+
+/**
+ * @brief CLI function to modify TAP interface
+ *
+ * @param *vm - vlib_main_t
+ * @param *input - unformat_input_t
+ * @param *cmd - vlib_cli_command_t
+ *
+ * @return error - clib_error_t
+ *
+ */
+static clib_error_t *
+tap_modify_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ u8 * intfc_name;
+ tapcli_main_t * tm = &tapcli_main;
+ u32 sw_if_index = ~0;
+ u32 new_sw_if_index = ~0;
+ int user_hwaddr = 0;
+ u8 hwaddr[6];
+
+ if (tm->is_disabled)
+ {
+ return clib_error_return (0, "device disabled...");
+ }
+
+ if (unformat (input, "%U", unformat_vnet_sw_interface, tm->vnet_main,
+ &sw_if_index))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+
+ if (unformat (input, "%s", &intfc_name))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+
+ if (unformat(input, "hwaddr %U", unformat_ethernet_address,
+ &hwaddr))
+ user_hwaddr = 1;
+
+
+ int rc = vnet_tap_modify (vm, sw_if_index, intfc_name,
+ (user_hwaddr == 1 ? hwaddr : 0),
+ &new_sw_if_index, 0, 0);
+
+ if (!rc) {
+ vlib_cli_output (vm, "Modified %U for Linux tap '%s'",
+ format_vnet_sw_if_index_name, tm->vnet_main,
+ new_sw_if_index, intfc_name);
+ } else {
+ vlib_cli_output (vm, "Error during modification of tap interface. (rc: %d)", rc);
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (tap_modify_command, static) = {
+ .path = "tap modify",
+ .short_help = "tap modify <vpp-tap-intfc-name> <linux-intfc-name> [hwaddr <addr>]",
+ .function = tap_modify_command_fn,
+};
+
+/**
+ * @brief CLI function to connect TAP interface
+ *
+ * @param *vm - vlib_main_t
+ * @param *input - unformat_input_t
+ * @param *cmd - vlib_cli_command_t
+ *
+ * @return error - clib_error_t
+ *
+ */
+static clib_error_t *
+tap_connect_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ u8 * intfc_name;
+ tapcli_main_t * tm = &tapcli_main;
+ u8 hwaddr[6];
+ u8 *hwaddr_arg = 0;
+ u32 sw_if_index;
+
+ if (tm->is_disabled)
+ {
+ return clib_error_return (0, "device disabled...");
+ }
+
+ if (unformat (input, "%s", &intfc_name))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+
+ if (unformat(input, "hwaddr %U", unformat_ethernet_address,
+ &hwaddr))
+ hwaddr_arg = hwaddr;
+
+ /* It is here for backward compatibility */
+ if (unformat(input, "hwaddr random"))
+ ;
+
+ int rv = vnet_tap_connect(vm, intfc_name, hwaddr_arg, &sw_if_index);
+ if (rv) {
+ switch (rv) {
+ case VNET_API_ERROR_SYSCALL_ERROR_1:
+ vlib_cli_output (vm, "Couldn't open /dev/net/tun");
+ break;
+
+ case VNET_API_ERROR_SYSCALL_ERROR_2:
+ vlib_cli_output (vm, "Error setting flags on '%s'", intfc_name);
+ break;
+
+ case VNET_API_ERROR_SYSCALL_ERROR_3:
+ vlib_cli_output (vm, "Couldn't open provisioning socket");
+ break;
+
+ case VNET_API_ERROR_SYSCALL_ERROR_4:
+ vlib_cli_output (vm, "Couldn't get if_index");
+ break;
+
+ case VNET_API_ERROR_SYSCALL_ERROR_5:
+ vlib_cli_output (vm, "Couldn't bind provisioning socket");
+ break;
+
+ case VNET_API_ERROR_SYSCALL_ERROR_6:
+ vlib_cli_output (0, "Couldn't set device non-blocking flag");
+ break;
+
+ case VNET_API_ERROR_SYSCALL_ERROR_7:
+ vlib_cli_output (0, "Couldn't set device MTU");
+ break;
+
+ case VNET_API_ERROR_SYSCALL_ERROR_8:
+ vlib_cli_output (0, "Couldn't get interface flags");
+ break;
+
+ case VNET_API_ERROR_SYSCALL_ERROR_9:
+ vlib_cli_output (0, "Couldn't set intfc admin state up");
+ break;
+
+ case VNET_API_ERROR_INVALID_REGISTRATION:
+ vlib_cli_output (0, "Invalid registration");
+ break;
+ default:
+ vlib_cli_output (0, "Unknown error: %d", rv);
+ break;
+ }
+ return 0;
+ }
+
+ vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main(), sw_if_index);
+ return 0;
+ }
+
+VLIB_CLI_COMMAND (tap_connect_command, static) = {
+ .path = "tap connect",
+ .short_help = "tap connect <intfc-name> [hwaddr <addr>]",
+ .function = tap_connect_command_fn,
+};
+
+/**
+ * @brief TAPCLI main init
+ *
+ * @param *vm - vlib_main_t
+ *
+ * @return error - clib_error_t
+ *
+ */
+clib_error_t *
+tapcli_init (vlib_main_t * vm)
+{
+ tapcli_main_t * tm = &tapcli_main;
+
+ tm->vlib_main = vm;
+ tm->vnet_main = vnet_get_main();
+ tm->unix_main = &unix_main;
+ tm->mtu_bytes = TAP_MTU_DEFAULT;
+ tm->tapcli_interface_index_by_sw_if_index = hash_create (0, sizeof(uword));
+ tm->tapcli_interface_index_by_unix_fd = hash_create (0, sizeof (uword));
+ tm->rx_buffers = 0;
+ vec_alloc(tm->rx_buffers, VLIB_FRAME_SIZE);
+ vec_reset_length(tm->rx_buffers);
+ vm->os_punt_frame = tapcli_nopunt_frame;
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (tapcli_init);
diff --git a/src/vnet/unix/tapcli.h b/src/vnet/unix/tapcli.h
new file mode 100644
index 00000000000..fcd82dbf25d
--- /dev/null
+++ b/src/vnet/unix/tapcli.h
@@ -0,0 +1,52 @@
+/*
+ * tapcli.h : tap support
+ *
+ * Copyright (c) 2013 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 TAPCLI definitions
+ */
+
+#ifndef __included_tapcli_h__
+#define __included_tapcli_h__
+
+/** TAP CLI errors */
+#define foreach_tapcli_error \
+ /* Must be first. */ \
+ _(NONE, "no error") \
+ _(READ, "read error") \
+ _(BUFFER_ALLOC, "buffer allocation error") \
+ _(UNKNOWN, "unknown error")
+
+typedef enum {
+#define _(sym,str) TAPCLI_ERROR_##sym,
+ foreach_tapcli_error
+#undef _
+ TAPCLI_N_ERROR,
+ } tapcli_error_t;
+
+/** TAP CLI interface details struct */
+typedef struct {
+ u32 sw_if_index;
+ u8 dev_name[64];
+} tapcli_interface_details_t;
+
+int vnet_tap_dump_ifs (tapcli_interface_details_t **out_tapids);
+
+#define TAP_MTU_MIN 68
+#define TAP_MTU_MAX 65535
+#define TAP_MTU_DEFAULT 1500
+
+#endif /* __included_tapcli_h__ */
diff --git a/src/vnet/unix/tuntap.c b/src/vnet/unix/tuntap.c
new file mode 100644
index 00000000000..4a5dd676a68
--- /dev/null
+++ b/src/vnet/unix/tuntap.c
@@ -0,0 +1,1000 @@
+/*
+ *------------------------------------------------------------------
+ * tuntap.c - kernel stack (reverse) punt/inject path
+ *
+ * Copyright (c) 2009 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 TunTap Kernel stack (reverse) punt/inject path.
+ *
+ * This driver runs in one of two distinct modes:
+ * - "punt/inject" mode, where we send pkts not otherwise processed
+ * by the forwarding to the Linux kernel stack, and
+ *
+ * - "normal interface" mode, where we treat the Linux kernel stack
+ * as a peer.
+ *
+ * By default, we select punt/inject mode.
+ */
+
+#include <fcntl.h> /* for open */
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h> /* for iovec */
+#include <netinet/in.h>
+
+#include <linux/if_arp.h>
+#include <linux/if_tun.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+
+#include <vnet/ip/ip.h>
+
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/devices/devices.h>
+#include <vnet/feature/feature.h>
+
+static vnet_device_class_t tuntap_dev_class;
+static vnet_hw_interface_class_t tuntap_interface_class;
+
+static void tuntap_punt_frame (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame);
+static void tuntap_nopunt_frame (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame);
+
+typedef struct {
+ u32 sw_if_index;
+ u8 is_v6;
+ u8 addr[16];
+} subif_address_t;
+
+/**
+ * @brief TUNTAP node main state
+ */
+typedef struct {
+ /** Vector of iovecs for readv/writev calls. */
+ struct iovec * iovecs;
+
+ /** Vector of VLIB rx buffers to use. We allocate them in blocks
+ of VLIB_FRAME_SIZE (256). */
+ u32 * rx_buffers;
+
+ /** File descriptors for /dev/net/tun and provisioning socket. */
+ int dev_net_tun_fd, dev_tap_fd;
+
+ /** Create a "tap" [ethernet] encaps device */
+ int is_ether;
+
+ /** 1 if a "normal" routed intfc, 0 if a punt/inject interface */
+
+ int have_normal_interface;
+
+ /** tap device destination MAC address. Required, or Linux drops pkts */
+ u8 ether_dst_mac[6];
+
+ /** Interface MTU in bytes and # of default sized buffers. */
+ u32 mtu_bytes, mtu_buffers;
+
+ /** Linux interface name for tun device. */
+ char * tun_name;
+
+ /** Pool of subinterface addresses */
+ subif_address_t *subifs;
+
+ /** Hash for subif addresses */
+ mhash_t subif_mhash;
+
+ /** Unix file index */
+ u32 unix_file_index;
+
+ /** For the "normal" interface, if configured */
+ u32 hw_if_index, sw_if_index;
+
+} tuntap_main_t;
+
+static tuntap_main_t tuntap_main = {
+ .tun_name = "vnet",
+
+ /** Suitable defaults for an Ethernet-like tun/tap device */
+ .mtu_bytes = 4096 + 256,
+};
+
+/**
+ * @brief tuntap_tx
+ * @node tuntap-tx
+ *
+ * Output node, writes the buffers comprising the incoming frame
+ * to the tun/tap device, aka hands them to the Linux kernel stack.
+ *
+ * @param *vm - vlib_main_t
+ * @param *node - vlib_node_runtime_t
+ * @param *frame - vlib_frame_t
+ *
+ * @return rc - uword
+ *
+ */
+static uword
+tuntap_tx (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 * buffers = vlib_frame_args (frame);
+ uword n_packets = frame->n_vectors;
+ tuntap_main_t * tm = &tuntap_main;
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_interface_main_t *im = &vnm->interface_main;
+ u32 n_bytes = 0;
+ int i;
+
+ for (i = 0; i < n_packets; i++)
+ {
+ struct iovec * iov;
+ vlib_buffer_t * b;
+ uword l;
+
+ b = vlib_get_buffer (vm, buffers[i]);
+
+ if (tm->is_ether && (!tm->have_normal_interface))
+ {
+ vlib_buffer_reset(b);
+ clib_memcpy (vlib_buffer_get_current (b), tm->ether_dst_mac, 6);
+ }
+
+ /* Re-set iovecs if present. */
+ if (tm->iovecs)
+ _vec_len (tm->iovecs) = 0;
+
+ /** VLIB buffer chain -> Unix iovec(s). */
+ vec_add2 (tm->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 (tm->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);
+ }
+
+ if (writev (tm->dev_net_tun_fd, tm->iovecs, vec_len (tm->iovecs)) < l)
+ clib_unix_warning ("writev");
+
+ n_bytes += l;
+ }
+
+ /* Update tuntap interface output stats. */
+ vlib_increment_combined_counter (im->combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_TX,
+ vm->cpu_index,
+ tm->sw_if_index, n_packets, n_bytes);
+
+
+ /** The normal interface path flattens the buffer chain */
+ if (tm->have_normal_interface)
+ vlib_buffer_free_no_next (vm, buffers, n_packets);
+ else
+ vlib_buffer_free (vm, buffers, n_packets);
+
+ return n_packets;
+}
+
+VLIB_REGISTER_NODE (tuntap_tx_node,static) = {
+ .function = tuntap_tx,
+ .name = "tuntap-tx",
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .vector_size = 4,
+};
+
+/**
+ * @brief TUNTAP receive node
+ * @node tuntap-rx
+ *
+ * @param *vm - vlib_main_t
+ * @param *node - vlib_node_runtime_t
+ * @param *frame - vlib_frame_t
+ *
+ * @return rc - uword
+ *
+ */
+static uword
+tuntap_rx (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ tuntap_main_t * tm = &tuntap_main;
+ vlib_buffer_t * b;
+ u32 bi;
+ const uword buffer_size = VLIB_BUFFER_DATA_SIZE;
+
+ /** Make sure we have some RX buffers. */
+ {
+ uword n_left = vec_len (tm->rx_buffers);
+ uword n_alloc;
+
+ if (n_left < VLIB_FRAME_SIZE / 2)
+ {
+ if (! tm->rx_buffers)
+ vec_alloc (tm->rx_buffers, VLIB_FRAME_SIZE);
+
+ n_alloc = vlib_buffer_alloc (vm, tm->rx_buffers + n_left, VLIB_FRAME_SIZE - n_left);
+ _vec_len (tm->rx_buffers) = n_left + n_alloc;
+ }
+ }
+
+ /** Allocate RX buffers from end of rx_buffers.
+ Turn them into iovecs to pass to readv. */
+ {
+ uword i_rx = vec_len (tm->rx_buffers) - 1;
+ vlib_buffer_t * b;
+ word i, n_bytes_left, n_bytes_in_packet;
+
+ /** We should have enough buffers left for an MTU sized packet. */
+ ASSERT (vec_len (tm->rx_buffers) >= tm->mtu_buffers);
+
+ vec_validate (tm->iovecs, tm->mtu_buffers - 1);
+ for (i = 0; i < tm->mtu_buffers; i++)
+ {
+ b = vlib_get_buffer (vm, tm->rx_buffers[i_rx - i]);
+ tm->iovecs[i].iov_base = b->data;
+ tm->iovecs[i].iov_len = buffer_size;
+ }
+
+ n_bytes_left = readv (tm->dev_net_tun_fd, tm->iovecs, tm->mtu_buffers);
+ n_bytes_in_packet = n_bytes_left;
+ if (n_bytes_left <= 0)
+ {
+ if (errno != EAGAIN)
+ clib_unix_warning ("readv %d", n_bytes_left);
+ return 0;
+ }
+
+ bi = tm->rx_buffers[i_rx];
+
+ while (1)
+ {
+ b = vlib_get_buffer (vm, tm->rx_buffers[i_rx]);
+ b->flags = 0;
+ b->current_data = 0;
+ b->current_length = n_bytes_left < buffer_size ? n_bytes_left : buffer_size;
+
+ n_bytes_left -= buffer_size;
+
+ if (n_bytes_left <= 0)
+ {
+ break;
+ }
+
+ i_rx--;
+ b->flags |= VLIB_BUFFER_NEXT_PRESENT;
+ b->next_buffer = tm->rx_buffers[i_rx];
+ }
+
+ /** Interface counters for tuntap interface. */
+ vlib_increment_combined_counter
+ (vnet_main.interface_main.combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX,
+ os_get_cpu_number(),
+ tm->sw_if_index,
+ 1, n_bytes_in_packet);
+
+ _vec_len (tm->rx_buffers) = i_rx;
+ }
+
+ b = vlib_get_buffer (vm, bi);
+
+ {
+ u32 next_index;
+ uword n_trace = vlib_get_trace_count (vm, node);
+
+ vnet_buffer (b)->sw_if_index[VLIB_RX] = tm->sw_if_index;
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = (u32)~0;
+
+ /*
+ * Turn this on if you run into
+ * "bad monkey" contexts, and you want to know exactly
+ * which nodes they've visited...
+ */
+ if (VLIB_BUFFER_TRACE_TRAJECTORY)
+ b->pre_data[0] = 0;
+
+ b->error = node->errors[0];
+
+ if (tm->is_ether)
+ {
+ next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+ }
+ else
+ switch (b->data[0] & 0xf0)
+ {
+ case 0x40:
+ next_index = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
+ break;
+ case 0x60:
+ next_index = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
+ break;
+ default:
+ next_index = VNET_DEVICE_INPUT_NEXT_DROP;
+ break;
+ }
+
+ /* The linux kernel couldn't care less if our interface is up */
+ if (tm->have_normal_interface)
+ {
+ vnet_main_t *vnm = vnet_get_main();
+ vnet_sw_interface_t * si;
+ si = vnet_get_sw_interface (vnm, tm->sw_if_index);
+ if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
+ next_index = VNET_DEVICE_INPUT_NEXT_DROP;
+ }
+
+ vnet_feature_start_device_input_x1 (tm->sw_if_index, &next_index, b, 0);
+
+ vlib_set_next_frame_buffer (vm, node, next_index, bi);
+
+ if (n_trace > 0)
+ {
+ vlib_trace_buffer (vm, node, next_index,
+ b, /* follow_chain */ 1);
+ vlib_set_trace_count (vm, node, n_trace - 1);
+ }
+ }
+
+ return 1;
+}
+
+/**
+ * @brief TUNTAP_RX error strings
+ */
+static char * tuntap_rx_error_strings[] = {
+ "unknown packet type",
+};
+
+VLIB_REGISTER_NODE (tuntap_rx_node,static) = {
+ .function = tuntap_rx,
+ .name = "tuntap-rx",
+ .sibling_of = "device-input",
+ .type = VLIB_NODE_TYPE_INPUT,
+ .state = VLIB_NODE_STATE_INTERRUPT,
+ .vector_size = 4,
+ .n_errors = 1,
+ .error_strings = tuntap_rx_error_strings,
+};
+
+/**
+ * @brief Gets called when file descriptor is ready from epoll.
+ *
+ * @param *uf - unix_file_t
+ *
+ * @return error - clib_error_t
+ */
+static clib_error_t * tuntap_read_ready (unix_file_t * uf)
+{
+ vlib_main_t * vm = vlib_get_main();
+ vlib_node_set_interrupt_pending (vm, tuntap_rx_node.index);
+ return 0;
+}
+
+/**
+ * @brief Clean up the tun/tap device
+ *
+ * @param *vm - vlib_main_t
+ *
+ * @return error - clib_error_t
+ *
+ */
+static clib_error_t *
+tuntap_exit (vlib_main_t * vm)
+{
+ tuntap_main_t *tm = &tuntap_main;
+ struct ifreq ifr;
+ int sfd;
+
+ /* Not present. */
+ if (! tm->dev_net_tun_fd || tm->dev_net_tun_fd < 0)
+ return 0;
+
+ sfd = socket (AF_INET, SOCK_STREAM, 0);
+ if (sfd < 0)
+ clib_unix_warning("provisioning socket");
+
+ memset(&ifr, 0, sizeof (ifr));
+ strncpy (ifr.ifr_name, tm->tun_name, sizeof (ifr.ifr_name)-1);
+
+ /* get flags, modify to bring down interface... */
+ if (ioctl (sfd, SIOCGIFFLAGS, &ifr) < 0)
+ clib_unix_warning ("SIOCGIFFLAGS");
+
+ ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
+
+ if (ioctl (sfd, SIOCSIFFLAGS, &ifr) < 0)
+ clib_unix_warning ("SIOCSIFFLAGS");
+
+ /* Turn off persistence */
+ if (ioctl (tm->dev_net_tun_fd, TUNSETPERSIST, 0) < 0)
+ clib_unix_warning ("TUNSETPERSIST");
+ close(tm->dev_tap_fd);
+ if (tm->dev_net_tun_fd >= 0)
+ close(tm->dev_net_tun_fd);
+ if (sfd >= 0)
+ close (sfd);
+
+ return 0;
+}
+
+VLIB_MAIN_LOOP_EXIT_FUNCTION (tuntap_exit);
+
+/**
+ * @brief CLI function for tun/tap config
+ *
+ * @param *vm - vlib_main_t
+ * @param *input - unformat_input_t
+ *
+ * @return error - clib_error_t
+ *
+ */
+static clib_error_t *
+tuntap_config (vlib_main_t * vm, unformat_input_t * input)
+{
+ tuntap_main_t *tm = &tuntap_main;
+ clib_error_t * error = 0;
+ struct ifreq ifr;
+ u8 * name;
+ int flags = IFF_TUN | IFF_NO_PI;
+ int is_enabled = 0, is_ether = 0, have_normal_interface = 0;
+ const uword buffer_size = VLIB_BUFFER_DATA_SIZE;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "mtu %d", &tm->mtu_bytes))
+ ;
+ else if (unformat (input, "enable"))
+ is_enabled = 1;
+ else if (unformat (input, "disable"))
+ is_enabled = 0;
+ else if (unformat (input, "ethernet") ||
+ unformat (input, "ether"))
+ is_ether = 1;
+ else if (unformat (input, "have-normal-interface") ||
+ unformat (input, "have-normal"))
+ have_normal_interface = 1;
+ else if (unformat (input, "name %s", &name))
+ tm->tun_name = (char *) name;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+
+ tm->dev_net_tun_fd = -1;
+ tm->dev_tap_fd = -1;
+
+ if (is_enabled == 0)
+ return 0;
+
+ if (geteuid())
+ {
+ clib_warning ("tuntap disabled: must be superuser");
+ return 0;
+ }
+
+ tm->is_ether = is_ether;
+ tm->have_normal_interface = have_normal_interface;
+
+ if (is_ether)
+ flags = IFF_TAP | IFF_NO_PI;
+
+ if ((tm->dev_net_tun_fd = open ("/dev/net/tun", O_RDWR)) < 0)
+ {
+ error = clib_error_return_unix (0, "open /dev/net/tun");
+ goto done;
+ }
+
+ memset (&ifr, 0, sizeof (ifr));
+ strncpy(ifr.ifr_name, tm->tun_name, sizeof(ifr.ifr_name)-1);
+ ifr.ifr_flags = flags;
+ if (ioctl (tm->dev_net_tun_fd, TUNSETIFF, (void *)&ifr) < 0)
+ {
+ error = clib_error_return_unix (0, "ioctl TUNSETIFF");
+ goto done;
+ }
+
+ /* Make it persistent, at least until we split. */
+ if (ioctl (tm->dev_net_tun_fd, TUNSETPERSIST, 1) < 0)
+ {
+ error = clib_error_return_unix (0, "TUNSETPERSIST");
+ goto done;
+ }
+
+ /* Open a provisioning socket */
+ if ((tm->dev_tap_fd = socket(PF_PACKET, SOCK_RAW,
+ htons(ETH_P_ALL))) < 0 )
+ {
+ error = clib_error_return_unix (0, "socket");
+ goto done;
+ }
+
+ /* Find the interface index. */
+ {
+ struct ifreq ifr;
+ struct sockaddr_ll sll;
+
+ memset (&ifr, 0, sizeof(ifr));
+ strncpy (ifr.ifr_name, tm->tun_name, sizeof(ifr.ifr_name)-1);
+ if (ioctl (tm->dev_tap_fd, SIOCGIFINDEX, &ifr) < 0 )
+ {
+ error = clib_error_return_unix (0, "ioctl SIOCGIFINDEX");
+ goto done;
+ }
+
+ /* Bind the provisioning socket to the interface. */
+ memset(&sll, 0, sizeof(sll));
+ sll.sll_family = AF_PACKET;
+ sll.sll_ifindex = ifr.ifr_ifindex;
+ sll.sll_protocol = htons(ETH_P_ALL);
+
+ if (bind(tm->dev_tap_fd, (struct sockaddr*) &sll, sizeof(sll)) < 0)
+ {
+ error = clib_error_return_unix (0, "bind");
+ goto done;
+ }
+ }
+
+ /* non-blocking I/O on /dev/tapX */
+ {
+ int one = 1;
+ if (ioctl (tm->dev_net_tun_fd, FIONBIO, &one) < 0)
+ {
+ error = clib_error_return_unix (0, "ioctl FIONBIO");
+ goto done;
+ }
+ }
+
+ tm->mtu_buffers = (tm->mtu_bytes + (buffer_size - 1)) / buffer_size;
+
+ ifr.ifr_mtu = tm->mtu_bytes;
+ if (ioctl (tm->dev_tap_fd, SIOCSIFMTU, &ifr) < 0)
+ {
+ error = clib_error_return_unix (0, "ioctl SIOCSIFMTU");
+ goto done;
+ }
+
+ /* get flags, modify to bring up interface... */
+ if (ioctl (tm->dev_tap_fd, SIOCGIFFLAGS, &ifr) < 0)
+ {
+ error = clib_error_return_unix (0, "ioctl SIOCGIFFLAGS");
+ goto done;
+ }
+
+ ifr.ifr_flags |= (IFF_UP | IFF_RUNNING);
+
+ if (ioctl (tm->dev_tap_fd, SIOCSIFFLAGS, &ifr) < 0)
+ {
+ error = clib_error_return_unix (0, "ioctl SIOCSIFFLAGS");
+ goto done;
+ }
+
+ if (is_ether)
+ {
+ if (ioctl (tm->dev_tap_fd, SIOCGIFHWADDR, &ifr) < 0)
+ {
+ error = clib_error_return_unix (0, "ioctl SIOCGIFHWADDR");
+ goto done;
+ }
+ else
+ clib_memcpy (tm->ether_dst_mac, ifr.ifr_hwaddr.sa_data, 6);
+ }
+
+ if (have_normal_interface)
+ {
+ vnet_main_t *vnm = vnet_get_main();
+ error = ethernet_register_interface
+ (vnm,
+ tuntap_dev_class.index,
+ 0 /* device instance */,
+ tm->ether_dst_mac /* ethernet address */,
+ &tm->hw_if_index,
+ 0 /* flag change */);
+ if (error)
+ clib_error_report (error);
+ tm->sw_if_index = tm->hw_if_index;
+ vm->os_punt_frame = tuntap_nopunt_frame;
+ }
+ else
+ {
+ vnet_main_t *vnm = vnet_get_main();
+ vnet_hw_interface_t * hi;
+
+ vm->os_punt_frame = tuntap_punt_frame;
+
+ tm->hw_if_index = vnet_register_interface
+ (vnm,
+ tuntap_dev_class.index, 0 /* device instance */,
+ tuntap_interface_class.index, 0);
+ hi = vnet_get_hw_interface (vnm, tm->hw_if_index);
+ tm->sw_if_index = hi->sw_if_index;
+
+ /* Interface is always up. */
+ vnet_hw_interface_set_flags (vnm, tm->hw_if_index,
+ VNET_HW_INTERFACE_FLAG_LINK_UP);
+ vnet_sw_interface_set_flags (vnm, tm->sw_if_index,
+ VNET_SW_INTERFACE_FLAG_ADMIN_UP);
+ }
+
+ {
+ unix_file_t template = {0};
+ template.read_function = tuntap_read_ready;
+ template.file_descriptor = tm->dev_net_tun_fd;
+ tm->unix_file_index = unix_file_add (&unix_main, &template);
+ }
+
+ done:
+ if (error)
+ {
+ if (tm->dev_net_tun_fd >= 0)
+ close (tm->dev_net_tun_fd);
+ if (tm->dev_tap_fd >= 0)
+ close (tm->dev_tap_fd);
+ }
+
+ return error;
+}
+
+VLIB_CONFIG_FUNCTION (tuntap_config, "tuntap");
+
+/**
+ * @brief Add or Del IP4 address to tun/tap interface
+ *
+ * @param *im - ip4_main_t
+ * @param opaque - uword
+ * @param sw_if_index - u32
+ * @param *address - ip4_address_t
+ * @param is_delete - u32
+ *
+ */
+void
+tuntap_ip4_add_del_interface_address (ip4_main_t * im,
+ uword opaque,
+ u32 sw_if_index,
+ ip4_address_t * address,
+ u32 address_length,
+ u32 if_address_index,
+ u32 is_delete)
+{
+ tuntap_main_t * tm = &tuntap_main;
+ struct ifreq ifr;
+ subif_address_t subif_addr, * ap;
+ uword * p;
+
+ /** Tuntap disabled, or using a "normal" interface. */
+ if (tm->have_normal_interface || tm->dev_tap_fd < 0)
+ return;
+
+ /** See if we already know about this subif */
+ memset (&subif_addr, 0, sizeof (subif_addr));
+ subif_addr.sw_if_index = sw_if_index;
+ clib_memcpy (&subif_addr.addr, address, sizeof (*address));
+
+ p = mhash_get (&tm->subif_mhash, &subif_addr);
+
+ if (p)
+ ap = pool_elt_at_index (tm->subifs, p[0]);
+ else
+ {
+ pool_get (tm->subifs, ap);
+ *ap = subif_addr;
+ mhash_set (&tm->subif_mhash, ap, ap - tm->subifs, 0);
+ }
+
+ /* Use subif pool index to select alias device. */
+ memset (&ifr, 0, sizeof (ifr));
+ snprintf (ifr.ifr_name, sizeof(ifr.ifr_name),
+ "%s:%d", tm->tun_name, (int)(ap - tm->subifs));
+
+ /* the tuntap punt/inject is enabled for IPv4 RX so long as
+ * any vpp interface has an IPv4 address.
+ * this is also ref counted.
+ */
+ ip4_sw_interface_enable_disable (tm->sw_if_index, !is_delete);
+
+ if (! is_delete)
+ {
+ struct sockaddr_in * sin;
+
+ sin = (struct sockaddr_in *)&ifr.ifr_addr;
+
+ /* Set ipv4 address, netmask. */
+ sin->sin_family = AF_INET;
+ clib_memcpy (&sin->sin_addr.s_addr, address, 4);
+ if (ioctl (tm->dev_tap_fd, SIOCSIFADDR, &ifr) < 0)
+ clib_unix_warning ("ioctl SIOCSIFADDR");
+
+ sin->sin_addr.s_addr = im->fib_masks[address_length];
+ if (ioctl (tm->dev_tap_fd, SIOCSIFNETMASK, &ifr) < 0)
+ clib_unix_warning ("ioctl SIOCSIFNETMASK");
+ }
+ else
+ {
+ mhash_unset (&tm->subif_mhash, &subif_addr, 0 /* old value ptr */);
+ pool_put (tm->subifs, ap);
+ }
+
+ /* get flags, modify to bring up interface... */
+ if (ioctl (tm->dev_tap_fd, SIOCGIFFLAGS, &ifr) < 0)
+ clib_unix_warning ("ioctl SIOCGIFFLAGS");
+
+ if (is_delete)
+ ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
+ else
+ ifr.ifr_flags |= (IFF_UP | IFF_RUNNING);
+
+ if (ioctl (tm->dev_tap_fd, SIOCSIFFLAGS, &ifr) < 0)
+ clib_unix_warning ("ioctl SIOCSIFFLAGS");
+}
+
+/**
+ * @brief workaround for a known include file bug.
+ * including @c <linux/ipv6.h> causes multiple definitions if
+ * @c <netinet/in.h is also included.
+ */
+struct in6_ifreq {
+ struct in6_addr ifr6_addr;
+ u32 ifr6_prefixlen;
+ int ifr6_ifindex;
+};
+
+/**
+ * @brief Add or Del tun/tap interface address.
+ *
+ * Both the v6 interface address API and the way ifconfig
+ * displays subinterfaces differ from their v4 couterparts.
+ * The code given here seems to work but YMMV.
+ *
+ * @param *im - ip6_main_t
+ * @param opaque - uword
+ * @param sw_if_index - u32
+ * @param *address - ip6_address_t
+ * @param address_length - u32
+ * @param if_address_index - u32
+ * @param is_delete - u32
+ */
+void
+tuntap_ip6_add_del_interface_address (ip6_main_t * im,
+ uword opaque,
+ u32 sw_if_index,
+ ip6_address_t * address,
+ u32 address_length,
+ u32 if_address_index,
+ u32 is_delete)
+{
+ tuntap_main_t * tm = &tuntap_main;
+ struct ifreq ifr;
+ struct in6_ifreq ifr6;
+ subif_address_t subif_addr, * ap;
+ uword * p;
+
+ /* Tuntap disabled, or using a "normal" interface. */
+ if (tm->have_normal_interface || tm->dev_tap_fd < 0)
+ return;
+
+ /* See if we already know about this subif */
+ memset (&subif_addr, 0, sizeof (subif_addr));
+ subif_addr.sw_if_index = sw_if_index;
+ subif_addr.is_v6 = 1;
+ clib_memcpy (&subif_addr.addr, address, sizeof (*address));
+
+ p = mhash_get (&tm->subif_mhash, &subif_addr);
+
+ if (p)
+ ap = pool_elt_at_index (tm->subifs, p[0]);
+ else
+ {
+ pool_get (tm->subifs, ap);
+ *ap = subif_addr;
+ mhash_set (&tm->subif_mhash, ap, ap - tm->subifs, 0);
+ }
+
+ /* Use subif pool index to select alias device. */
+ memset (&ifr, 0, sizeof (ifr));
+ memset (&ifr6, 0, sizeof (ifr6));
+ snprintf (ifr.ifr_name, sizeof(ifr.ifr_name),
+ "%s:%d", tm->tun_name, (int)(ap - tm->subifs));
+
+ /* the tuntap punt/inject is enabled for IPv6 RX so long as
+ * any vpp interface has an IPv6 address.
+ * this is also ref counted.
+ */
+ ip6_sw_interface_enable_disable (tm->sw_if_index, !is_delete);
+
+ if (! is_delete)
+ {
+ int sockfd = socket (AF_INET6, SOCK_STREAM, 0);
+ if (sockfd < 0)
+ clib_unix_warning ("get ifindex socket");
+
+ if (ioctl (sockfd, SIOGIFINDEX, &ifr) < 0)
+ clib_unix_warning ("get ifindex");
+
+ ifr6.ifr6_ifindex = ifr.ifr_ifindex;
+ ifr6.ifr6_prefixlen = address_length;
+ clib_memcpy (&ifr6.ifr6_addr, address, 16);
+
+ if (ioctl (sockfd, SIOCSIFADDR, &ifr6) < 0)
+ clib_unix_warning ("set address");
+
+ if (sockfd >= 0)
+ close (sockfd);
+ }
+ else
+ {
+ int sockfd = socket (AF_INET6, SOCK_STREAM, 0);
+ if (sockfd < 0)
+ clib_unix_warning ("get ifindex socket");
+
+ if (ioctl (sockfd, SIOGIFINDEX, &ifr) < 0)
+ clib_unix_warning ("get ifindex");
+
+ ifr6.ifr6_ifindex = ifr.ifr_ifindex;
+ ifr6.ifr6_prefixlen = address_length;
+ clib_memcpy (&ifr6.ifr6_addr, address, 16);
+
+ if (ioctl (sockfd, SIOCDIFADDR, &ifr6) < 0)
+ clib_unix_warning ("del address");
+
+ if (sockfd >= 0)
+ close (sockfd);
+
+ mhash_unset (&tm->subif_mhash, &subif_addr, 0 /* old value ptr */);
+ pool_put (tm->subifs, ap);
+ }
+}
+
+/**
+ * @brief TX the tun/tap frame
+ *
+ * @param *vm - vlib_main_t
+ * @param *node - vlib_node_runtime_t
+ * @param *frame - vlib_frame_t
+ *
+ */
+static void
+tuntap_punt_frame (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ tuntap_tx (vm, node, frame);
+ vlib_frame_free (vm, node, frame);
+}
+
+/**
+ * @brief Free the tun/tap frame
+ *
+ * @param *vm - vlib_main_t
+ * @param *node - vlib_node_runtime_t
+ * @param *frame - vlib_frame_t
+ *
+ */
+static void
+tuntap_nopunt_frame (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 * buffers = vlib_frame_args (frame);
+ uword n_packets = frame->n_vectors;
+ vlib_buffer_free (vm, buffers, n_packets);
+ vlib_frame_free (vm, node, frame);
+}
+
+VNET_HW_INTERFACE_CLASS (tuntap_interface_class,static) = {
+ .name = "tuntap",
+ .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
+};
+
+/**
+ * @brief Format tun/tap interface name
+ *
+ * @param *s - u8 - formatter string
+ * @param *args - va_list
+ *
+ * @return *s - u8 - formatted string
+ *
+ */
+static u8 * format_tuntap_interface_name (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+
+ s = format (s, "tuntap-%d", i);
+ return s;
+}
+
+/**
+ * @brief TX packet out tun/tap
+ *
+ * @param *vm - vlib_main_t
+ * @param *node - vlib_node_runtime_t
+ * @param *frame - vlib_frame_t
+ *
+ * @return n_buffers - uword - Packets transmitted
+ *
+ */
+static uword
+tuntap_intfc_tx (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ tuntap_main_t * tm = &tuntap_main;
+ u32 * buffers = vlib_frame_args (frame);
+ uword n_buffers = frame->n_vectors;
+
+ /* Normal interface transmit happens only on the normal interface... */
+ if (tm->have_normal_interface)
+ return tuntap_tx (vm, node, frame);
+
+ vlib_buffer_free (vm, buffers, n_buffers);
+ return n_buffers;
+}
+
+VNET_DEVICE_CLASS (tuntap_dev_class,static) = {
+ .name = "tuntap",
+ .tx_function = tuntap_intfc_tx,
+ .format_device_name = format_tuntap_interface_name,
+};
+
+/**
+ * @brief tun/tap node init
+ *
+ * @param *vm - vlib_main_t
+ *
+ * @return error - clib_error_t
+ *
+ */
+static clib_error_t *
+tuntap_init (vlib_main_t * vm)
+{
+ clib_error_t * error;
+ ip4_main_t * im4 = &ip4_main;
+ ip6_main_t * im6 = &ip6_main;
+ ip4_add_del_interface_address_callback_t cb4;
+ ip6_add_del_interface_address_callback_t cb6;
+ tuntap_main_t * tm = &tuntap_main;
+
+ error = vlib_call_init_function (vm, ip4_init);
+ if (error)
+ return error;
+
+ mhash_init (&tm->subif_mhash, sizeof (u32), sizeof(subif_address_t));
+
+ cb4.function = tuntap_ip4_add_del_interface_address;
+ cb4.function_opaque = 0;
+ vec_add1 (im4->add_del_interface_address_callbacks, cb4);
+
+ cb6.function = tuntap_ip6_add_del_interface_address;
+ cb6.function_opaque = 0;
+ vec_add1 (im6->add_del_interface_address_callbacks, cb6);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (tuntap_init);
diff --git a/src/vnet/unix/tuntap.h b/src/vnet/unix/tuntap.h
new file mode 100644
index 00000000000..d7f96caeaf0
--- /dev/null
+++ b/src/vnet/unix/tuntap.h
@@ -0,0 +1,36 @@
+/*
+ *------------------------------------------------------------------
+ * tuntap.h - kernel stack (reverse) punt/inject path
+ *
+ * Copyright (c) 2009 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 Call from VLIB_INIT_FUNCTION to set the Linux kernel inject node name.
+ */
+void register_tuntap_inject_node_name (char *name);
+
+int vnet_tap_connect (vlib_main_t * vm, u8 * intfc_name,
+ u8 *hwaddr_arg, u32 * sw_if_indexp);
+int vnet_tap_connect_renumber (vlib_main_t * vm, u8 * intfc_name,
+ u8 *hwaddr_arg, u32 * sw_if_indexp,
+ u8 renumber, u32 custom_dev_instance);
+
+int vnet_tap_delete(vlib_main_t *vm, u32 sw_if_index);
+
+int vnet_tap_modify (vlib_main_t * vm, u32 orig_sw_if_index,
+ u8 * intfc_name, u8 *hwaddr_arg,
+ u32 * sw_if_indexp,
+ u8 renumber, u32 custom_dev_instance);