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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.
#ifndef _MAIN_H
#define _MAIN_H
#include <assert.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <semaphore.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.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 FATAL(format, ...) \
do { \
fprintf(stdout, "[ERROR] " format "\n", ##__VA_ARGS__); \
exit(1); \
} while (0)
#define WARN(command, format, ...) \
if (command) { \
fprintf(stdout, "[WARN] " format "\n", ##__VA_ARGS__); \
}
#define WARN_RETURN(command, format, ...) \
if (command) { \
fprintf(stdout, "[WARN] " format "\n", ##__VA_ARGS__); \
return -1; \
}
#define debug(format, ...) \
if (DEBUG_ON) { \
fprintf(stdout, "[DEBUG] " format "\n", ##__VA_ARGS__); \
}
#define info(format, ...) fprintf(stdout, "[INFO] " format "\n", ##__VA_ARGS__);
#define likely(x) __builtin_expect((x), 1)
#define unlikely(x) __builtin_expect((x), 0)
#define CEIL_DIV(a, b) (((a) + (b)-1) / (b))
#define NEXT(i, l) ((i + 1) % l)
#define PREV(i, l) ((i - 1) % l)
#define TRUNK_SIZE_BY_PAGE (150) // 150 pages
#define MAX_TRUNK_ID (80)
#define STORAGE_PREFIX "nflog_storage"
enum nfl_compression_t { COMPRESS_NONE, COMPRESS_LZ4, COMPRESS_ZSTD };
typedef struct __attribute__((packed)) _nfl_header_t {
uint32_t id; /* 0 4 */
uint32_t n_entries; /* 4 4 */
uint32_t max_n_entries; /* 8 4 */
uint32_t cksum; /* 12 4 */
enum nfl_compression_t compression_opt; /* 16 4 */
time_t start_time; /* 20 8 */
time_t end_time; /* 28 8 */
/* size: 36, cachelines: 1, members: 7 */
/* last cacheline: 36 bytes */
} nfl_header_t;
typedef struct __attribute__((packed)) _nfl_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 */
} nfl_entry_t;
typedef struct _nfl_global_t {
sem_t *nfl_commit_queue;
uint16_t nfl_group_id;
const char *storage_dir;
enum nfl_compression_t compression_opt;
} nfl_global_t;
typedef struct _nfl_state_t {
nfl_global_t *global;
nfl_header_t *header;
nfl_entry_t *store;
struct nflog_handle *nfl_fd;
struct nflog_g_handle *nfl_group_fd;
bool has_finished;
pthread_cond_t has_finished_cond;
pthread_mutex_t has_finished_lock;
pthread_t thread;
} nfl_state_t;
// only copy size of ipv4 header + tcp header
static const int nfl_recv_size = sizeof(struct iphdr) + sizeof(struct tcphdr);
#endif // _MAIN_H
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