#ifndef _TFE_PACKET_IO_H
#define _TFE_PACKET_IO_H

#ifdef __cpluscplus
extern "C"
{
#endif

#include "tuple.h"
#include "tfe_packet_io_fs.h"

struct tap_ctx
{
    int tap_s;
    int tap_c;
    int tap_fd;

    int eventfd;
    int eventfd_c;
    int eventfd_s;

    struct io_uring_instance *io_uring_fd;
    struct io_uring_instance *io_uring_c;
    struct io_uring_instance *io_uring_s;
};

struct packet_io_thread_ctx
{
    pthread_t tid;
    int thread_index;
    
    struct tap_ctx *tap_ctx;
    struct session_table *session_table;

    struct packet_io *ref_io;
    struct tfe_proxy *ref_proxy;
    struct packet_io_fs *ret_fs_state;
    struct acceptor_kni_v4 *ref_acceptor_ctx;
    struct expiry_dablooms_handle *dup_packet_filter;

    void *logger;
    int session_table_need_reset;
};

struct packet_info
{
    int is_ipv4;
    int is_e2i_dir;
    int header_len;
    char *header_data;

    struct tuple4 tuple4;
    struct sids sids;
    struct route_ctx route_ctx;
    struct throughput_metrics rx;
    struct throughput_metrics rx_send_complete;
};

struct session_ctx
{
    uint64_t policy_ids;
    uint64_t session_id;
    uint8_t is_passthrough;
    uint8_t protocol;
    uint8_t metric_hit;
    char session_addr[128];

    struct packet_info c2s_info;
    struct packet_info s2c_info;
    struct timespec metrics_last_time;

    struct metadata *ctrl_meta;

    struct tfe_cmsg *cmsg;

    struct packet_io_thread_ctx *ref_thread_ctx;
};

struct acceptor_kni_v4
{
    int dup_packet_filter_enable;
    int dup_packet_filter_capacity;
    int dup_packet_filter_timeout;
    double dup_packet_filter_error_rate;

    int debug;
    int firewall_sids;
    int proxy_sids;
    int sce_sids;
    int nr_worker_threads;
    int cpu_affinity_mask[TFE_THREAD_MAX];
    cpu_set_t coremask;

    struct packet_io *io;
    struct packet_io_fs *packet_io_fs;
    struct tfe_fieldstat_metric_t *metric;
    struct packet_io_thread_ctx work_threads[TFE_THREAD_MAX];

    struct tfe_proxy *ref_proxy;
};

int is_enable_iouring(struct packet_io *handle);

void tfe_tap_ctx_destory(struct tap_ctx *handler);
struct tap_ctx *tfe_tap_ctx_create(void *ctx);

int packet_io_thread_init(struct packet_io *handle, struct packet_io_thread_ctx *thread_ctx, void *logger);
void packet_io_thread_wait(struct packet_io *handle, struct packet_io_thread_ctx *thread_ctx, int timeout_ms);
void packet_io_destory(struct packet_io *handle);
struct packet_io *packet_io_create(const char *profile, int thread_num, cpu_set_t *coremask, void *logger);

int packet_io_polling_nf_interface(struct packet_io *handle, int thread_seq, void *ctx);
void handle_decryption_packet_from_tap(const char *data, int len, void *args);
void handle_raw_packet_from_tap(const char *data, int len, void *args);

// only for test
int raw_traffic_decapsulate(struct packet *handler, const char *raw_data, int raw_len, char **header, int *header_len, int *is_ipv4);

#ifdef __cpluscplus
}
#endif

#endif