Anon: ip_structs.h Source File

00001 //These definitions are borrowed from tcpdump
00002 #ifndef ETHER_HDRLEN 
00003 #define ETHER_HDRLEN 14
00004 #endif
00005 
00006 struct ip_s {
00007     u_int8_t    ip_vhl;     /* header length, version */
00008 #define IP_V(ip)    (((ip)->ip_vhl & 0xf0) >> 4)
00009 #define IP_HL(ip)   ((ip)->ip_vhl & 0x0f)
00010     u_int8_t    ip_tos;         /* type of service */
00011     u_int16_t   ip_len;         /* total length */
00012     u_int16_t   ip_id;          /* identification */
00013     u_int16_t   ip_off;         /* fragment offset field */
00014 #define IP_DF 0x4000            /* dont fragment flag */
00015 #define IP_MF 0x2000            /* more fragments flag */
00016 #define IP_OFFMASK 0x1fff       /* mask for fragmenting bits */
00017     u_int8_t    ip_ttl;         /* time to live */
00018     u_int8_t    ip_p;           /* protocol */
00019     u_int16_t   ip_sum;         /* checksum */
00020     struct  in_addr ip_src,ip_dst;  /* source and dest address */
00021 };