#define IPVERSION 4
#define IP_DF 0x4000
#define IP_MF 0x2000
#define IP_OFFMASK 0x1fff
#define IPOPT_EOL 0
#define IPOPT_NOP 1
#define IPOPT_RR 7
#define IPOPT_TS 68
#define IPOPT_SECURITY 130
#define IPOPT_LSRR 131
#define IPOPT_SATID 136
#define IPOPT_SSRR 137
#define IPOPT_OPTVAL 0
#define IPOPT_OLEN 1
#define IPOPT_OFFSET 2
#define IPOPT_MINOFF 4
#define MAXTTL 255
#define IPDEFTTL 64
#define IPFRAGTTL 60
#define IPTTLDEC 1
| See: | Type struct ip |
| struct ip | |
| { | |
| u_char ip_hl:4; | |
| u_char ip_v:4; | |
| u_char ip_tos; | |
| short ip_len; | |
| u_short ip_id; | |
| short ip_off; | |
| u_char ip_ttl; | |
| u_char ip_p; | |
| u_short ip_sum; | |
| u_long ip_src; | |
| u_long ip_dst; | |
| } |