" #endif __u8 tos; __be16 tot_len; __be16 id; __be16 frag_off; __u8 ttl; __u8 protocol; __sum16 check; __be32 saddr; __be32 daddr; /*The options start here. */ }; struct ip_auth_hdr { __u8 nexthdr; __u8 hdrlen; /* This one is measured in 32 bit units! */ __be16 reserved; __be32 spi; __be32 seq_no; /* Sequence number */ __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ }; struct ip_esp_hdr { __be32 spi; __be32 seq_no; /* Sequence number */ __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ }; struct ip_comp_hdr { __u8 nexthdr; __u8 flags; __be16 cpi; }; struct ip_beet_phdr { __u8 nexthdr; __u8 hdrlen; __u8 padlen; __u8 reserved; }; #endif /* _LINUX_IP_H */