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/*
* Copyright (c) 2018 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 MPCAP utility definitions
*/
#ifndef included_vppinfra_mpcap_h
#define included_vppinfra_mpcap_h
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <vppinfra/time_range.h>
#include <vppinfra/lock.h>
/**
* @brief Packet types supported by MPCAP
*
* null 0
* ethernet 1
* ppp 9
* ip 12
* hdlc 104
*/
#define foreach_vnet_mpcap_packet_type \
_ (null, 0) \
_ (ethernet, 1) \
_ (ppp, 9) \
_ (ip, 12) \
_ (hdlc, 104)
typedef enum
{
#define _(f,n) MPCAP_PACKET_TYPE_##f = (n),
foreach_vnet_mpcap_packet_type
#undef _
} mpcap_packet_type_t;
#define foreach_mpcap_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_mpcap_packet_type_t. */ \
_ (u32, packet_type)
/** File header struct */
typedef struct
{
#define _(t, f) t f;
foreach_mpcap_file_header
#undef _
} mpcap_file_header_t;
#define foreach_mpcap_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_mpcap_packet_header
#undef _
/** Packet data follows. */
u8 data[0];
} mpcap_packet_header_t;
/**
* @brief MPCAP main state data structure
*/
typedef struct
{
/** File name of mpcap output. */
char *file_name;
/** spinlock, initialized if flagged MPCAP_FLAG_THREAD_SAFE */
clib_spinlock_t lock;
/** Number of packets to capture. */
u32 n_packets_to_capture;
/** Packet type */
mpcap_packet_type_t packet_type;
/** Maximum file size */
u64 max_file_size;
/** Base address */
u8 *file_baseva;
/** current memory address */
u8 *current_va;
/** Number of packets currently captured. */
u32 n_packets_captured;
/** Pointer to file header in svm, for ease of updating */
mpcap_file_header_t *file_header;
/** flags */
u32 flags;
#define MPCAP_FLAG_INIT_DONE (1 << 0)
#define MPCAP_FLAG_THREAD_SAFE (1 << 1)
#define MPCAP_FLAG_WRITE_ENABLE (1 << 2)
/** Bytes written */
u32 n_mpcap_data_written;
/** Vector of mpcap data. */
u8 *mpcap_data;
/** Packets in mapped mpcap file. */
u64 packets_read;
/** Min/Max Packet bytes */
u32 min_packet_bytes, max_packet_bytes;
} mpcap_main_t;
/* Some sensible default size */
#define MPCAP_DEFAULT_FILE_SIZE (10<<20)
/** initialize a mpcap file (for writing) */
clib_error_t *mpcap_init (mpcap_main_t * pm);
/** Flush / unmap a mpcap file */
clib_error_t *mpcap_close (mpcap_main_t * pm);
/** mmap a mpcap data file. */
clib_error_t *mpcap_map (mpcap_main_t * pm);
#endif /* included_vppinfra_mpcap_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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