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#pragma once
#include <linux/kernel.h>
#include <linux/socket.h>
#include <linux/skbuff.h>
#include <linux/kthread.h>
enum tcp_restore_info_tlv_type
{
TCP_RESTORE_INFO_TLV_SEQ = 0x0,
TCP_RESTORE_INFO_TLV_ACK = 0x1,
TCP_RESTORE_INFO_TLV_MSS_CLIENT = 0x2,
TCP_RESTORE_INFO_TLV_MSS_SERVER = 0x3,
TCP_RESTORE_INFO_TLV_WSACLE_CLIENT = 0x4,
TCP_RESTORE_INFO_TLV_WSACLE_SERVER = 0x5,
TCP_RESTORE_INFO_TLV_SACK_CLIENT = 0x6,
TCP_RESTORE_INFO_TLV_SACK_SERVER = 0x7,
TCP_RESTORE_INFO_TLV_TS_CLIENT = 0x8,
TCP_RESTORE_INFO_TLV_TS_SERVER = 0x9,
TCP_RESTORE_INFO_TLV_PROTOCOL = 0xa,
TCP_RESTORE_INFO_WINDOW_CLIENT = 0xb,
TCP_RESTORE_INFO_WINDOW_SERVER = 0xc,
};
struct tcp_restore_info_endpoint
{
struct sockaddr_storage addr;
uint32_t seq;
uint32_t ack;
bool wscale_perm;
bool timestamp_perm;
bool sack_perm;
uint16_t mss;
uint16_t window;
uint8_t wscale;
};
struct tcp_restore_info
{
struct tfe_kmod_instance * instance;
struct kthread_work kthread_work;
struct nf_queue_entry * nf_queue_entry;
struct tcp_restore_info_endpoint client;
struct tcp_restore_info_endpoint server;
char cmsg[2048];
unsigned int cmsg_len;
};
struct tcp_restore_info_tlv
{
uint16_t type;
uint16_t length;
union
{
uint8_t value_as_uint8[0];
uint16_t value_as_uint16[0];
uint32_t value_as_uint32[0];
unsigned char value_as_string[0];
};
} __attribute__((packed));
struct tcp_restore_info_header
{
uint8_t __magic__[2]; /* Must be 0x4d, 0x5a */
uint16_t nr_tlvs;
struct tcp_restore_info_tlv tlvs[0];
} __attribute__((packed));
#define TCP_RESTORE_TCPOPT_KIND 88
#define TCP_RESTORE_TCPOPT_LENGTH 4
void tcp_restore_info_dump_to_log(const struct tcp_restore_info * info);
int tcp_restore_info_parse_from_skb(struct sk_buff * skb, struct tcp_restore_info * out);
int tcp_restore_info_parse_from_cmsg(const char * data, unsigned int datalen, struct tcp_restore_info * out);
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