/*server/ip/gen/tcp_hdr.h*/#ifndef __SERVER__IP__GEN__TCP_HDR_H__#define __SERVER__IP__GEN__TCP_HDR_H__typedef struct tcp_hdr{	tcpport_t th_srcport;	tcpport_t th_dstport;	u32_t th_seq_nr;	u32_t th_ack_nr;	u8_t th_data_off;	u8_t th_flags;	u16_t th_window;	u16_t th_chksum;	u16_t th_urgptr;} tcp_hdr_t;#define TH_DO_MASK	0xf0#define TH_FLAGS_MASK	0x3f#define THF_FIN		0x1#define THF_SYN		0x2#define THF_RST		0x4#define THF_PSH		0x8#define THF_ACK		0x10#define THF_URG		0x20typedef struct tcp_hdropt{	int tho_opt_siz;	u8_t tho_data[TCP_MAX_HDR_SIZE-TCP_MIN_HDR_SIZE];} tcp_hdropt_t;#endif /* __SERVER__IP__GEN__TCP_HDR_H__ */