ReactOS Development > Doxygen
vjbsdhdr.h
Go to the documentation of this file.
00001 #ifndef VJBSDHDR_H 00002 #define VJBSDHDR_H 00003 00004 #include "lwip/tcp.h" 00005 00006 /* 00007 * Structure of an internet header, naked of options. 00008 * 00009 * We declare ip_len and ip_off to be short, rather than u_short 00010 * pragmatically since otherwise unsigned comparisons can result 00011 * against negative integers quite easily, and fail in subtle ways. 00012 */ 00013 PACK_STRUCT_BEGIN 00014 struct ip 00015 { 00016 #if defined(NO_CHAR_BITFIELDS) 00017 u_char ip_hl_v; /* bug in GCC for mips means the bitfield stuff will sometimes break - so we use a char for both and get round it with macro's instead... */ 00018 #else 00019 #if BYTE_ORDER == LITTLE_ENDIAN 00020 unsigned ip_hl:4, /* header length */ 00021 ip_v :4; /* version */ 00022 #elif BYTE_ORDER == BIG_ENDIAN 00023 unsigned ip_v :4, /* version */ 00024 ip_hl:4; /* header length */ 00025 #else 00026 COMPLAIN - NO BYTE ORDER SELECTED! 00027 #endif 00028 #endif 00029 u_char ip_tos; /* type of service */ 00030 u_short ip_len; /* total length */ 00031 u_short ip_id; /* identification */ 00032 u_short ip_off; /* fragment offset field */ 00033 #define IP_DF 0x4000 /* dont fragment flag */ 00034 #define IP_MF 0x2000 /* more fragments flag */ 00035 #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ 00036 u_char ip_ttl; /* time to live */ 00037 u_char ip_p; /* protocol */ 00038 u_short ip_sum; /* checksum */ 00039 struct in_addr ip_src,ip_dst; /* source and dest address */ 00040 }; 00041 PACK_STRUCT_END 00042 00043 typedef u32_t tcp_seq; 00044 00045 /* 00046 * TCP header. 00047 * Per RFC 793, September, 1981. 00048 */ 00049 PACK_STRUCT_BEGIN 00050 struct tcphdr 00051 { 00052 u_short th_sport; /* source port */ 00053 u_short th_dport; /* destination port */ 00054 tcp_seq th_seq; /* sequence number */ 00055 tcp_seq th_ack; /* acknowledgement number */ 00056 #if defined(NO_CHAR_BITFIELDS) 00057 u_char th_x2_off; 00058 #else 00059 #if BYTE_ORDER == LITTLE_ENDIAN 00060 unsigned th_x2 :4, /* (unused) */ 00061 th_off:4; /* data offset */ 00062 #endif 00063 #if BYTE_ORDER == BIG_ENDIAN 00064 unsigned th_off:4, /* data offset */ 00065 th_x2 :4; /* (unused) */ 00066 #endif 00067 #endif 00068 u_char th_flags; 00069 u_short th_win; /* window */ 00070 u_short th_sum; /* checksum */ 00071 u_short th_urp; /* urgent pointer */ 00072 }; 00073 PACK_STRUCT_END 00074 00075 #endif /* VJBSDHDR_H */
Generated on Sun May 27 2012 04:36:11 for ReactOS by
1.7.6.1
