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// The MIT License (MIT)
// Copyright (c) 2017 Yun-Chih Chen
// 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.
#pragma once
#include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#ifdef DEBUG
#define DEBUG_ON 1
#else
#define DEBUG_ON 0
#endif
#define ASSERT(condition, error_msg) \
if (!(condition)) { \
fputs((error_msg), stderr); \
exit(1); \
}
#define ERR(command, error_msg) \
if (command) { \
perror((error_msg)); \
exit(1); \
}
#define debug(format, ...) \
if (DEBUG_ON) { \
fprintf(stdout, format, ##__VA_ARGS__); \
}
#define CEILING(a,b) ((a)%(b) == 0 ? ((a)/(b)) : ((a)/(b)+1))
#define TRUNK_SIZE (4096 * 150)
typedef struct __attribute__((packed)) _nflog_header_t {
uint32_t id; /* 0 4 */
uint32_t n_entries; /* 4 4 */
uint32_t max_n_entries; /* 8 4 */
uint32_t _unused; /* 12 4 */
uint64_t start_time; /* 16 8 */
uint64_t end_time; /* 24 8 */
/* size: 32, cachelines: 1, members: 6 */
} nflog_header_t;
typedef struct __attribute__((packed)) _nflog_entry_t {
// current timestamp since UNIX epoch
time_t timestamp; /* 0 8 */
// dest address
struct in_addr daddr; /* 8 4 */
// uid
uint32_t uid; /* 12 4 */
// unused space, just for padding
uint8_t __unused1; /* 16 1 */
// IP protocol (UDP or TCP)
uint8_t protocol; /* 17 1 */
// unused space, just for padding
uint16_t __unused2; /* 18 2 */
// source port
uint16_t sport; /* 20 2 */
// destination port
uint16_t dport; /* 22 2 */
/* size: 24, cachelines: 1, members: 8 */
} nflog_entry_t;
typedef struct _nflog_state_t {
nflog_header_t* header;
nflog_entry_t* store;
struct nflog_handle *nfl_fd;
struct nflog_g_handle *nfl_group_fd;
pthread_mutex_t lock;
pthread_t thread;
} nflog_state_t;
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