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changed to custom header definitons

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wangyu-
2018-07-26 11:25:36 -05:00
parent 1bc20c1cdb
commit 10869eb197
4 changed files with 185 additions and 51 deletions
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121
network.h
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@@ -30,20 +30,125 @@ extern char g_packet_buf[buf_len];
extern int g_packet_buf_len;
extern int g_packet_buf_cnt;
struct my_iphdr
{
#ifdef UDP2RAW_LITTLE_ENDIAN
unsigned char ihl:4;
unsigned char version:4;
#else
unsigned char version:4;
unsigned char ihl:4;
#endif
u_int8_t tos;
u_int16_t tot_len;
u_int16_t id;
u_int16_t frag_off;
u_int8_t ttl;
u_int8_t protocol;
u_int16_t check;
u_int32_t saddr;
u_int32_t daddr;
/*The options start here. */
};
struct my_udphdr
{
/*__extension__*/ union
{
struct
{
u_int16_t uh_sport; /* source port */
u_int16_t uh_dport; /* destination port */
u_int16_t uh_ulen; /* udp length */
u_int16_t uh_sum; /* udp checksum */
};
struct
{
u_int16_t source;
u_int16_t dest;
u_int16_t len;
u_int16_t check;
};
};
};
struct my_tcphdr
{
/*__extension__*/ union
{
struct
{
u_int16_t th_sport; /* source port */
u_int16_t th_dport; /* destination port */
u_int32_t th_seq; /* sequence number */
u_int32_t th_ack; /* acknowledgement number */
# ifdef UDP2RAW_LITTLE_ENDIAN
u_int8_t th_x2:4; /* (unused) */
u_int8_t tc_off:4; /* data offset */
# else
u_int8_t th_off:4; /* data offset */
u_int8_t th_x2:4; /* (unused) */
# endif
u_int8_t th_flags;
# define TH_FIN 0x01
# define TH_SYN 0x02
# define TH_RST 0x04
# define TH_PUSH 0x08
# define TH_ACK 0x10
# define TH_URG 0x20
u_int16_t th_win; /* window */
u_int16_t th_sum; /* checksum */
u_int16_t th_urp; /* urgent pointer */
};
struct
{
u_int16_t source;
u_int16_t dest;
u_int32_t seq;
u_int32_t ack_seq;
# ifdef UDP2RAW_LITTLE_ENDIAN
u_int16_t res1:4;
u_int16_t doff:4;
u_int16_t fin:1;
u_int16_t syn:1;
u_int16_t rst:1;
u_int16_t psh:1;
u_int16_t ack:1;
u_int16_t urg:1;
u_int16_t res2:2;
# else
u_int16_t doff:4;
u_int16_t res1:4;
u_int16_t res2:2;
u_int16_t urg:1;
u_int16_t ack:1;
u_int16_t psh:1;
u_int16_t rst:1;
u_int16_t syn:1;
u_int16_t fin:1;
# endif
u_int16_t window;
u_int16_t check;
u_int16_t urg_ptr;
};
};
};
struct my_ip6hdr
{
#if __BYTE_ORDER == __LITTLE_ENDIAN
# ifdef UDP2RAW_LITTLE_ENDIAN
uint8_t traffic_class_high:4;
uint8_t version:4;
uint8_t flow_label_high:4;
uint8_t traffic_class_low:4;
#elif __BYTE_ORDER == __BIG_ENDIAN
uint8_t version:4;
uint8_t traffic_class_high:4;
uint8_t traffic_class_low:4;
uint8_t flow_label_high:4;
#else
# error "Please fix this"
uint8_t version:4;
uint8_t traffic_class_high:4;
uint8_t traffic_class_low:4;
uint8_t flow_label_high:4;
#endif
u_int16_t flow_label_low;
u_int16_t payload_len;
@@ -54,7 +159,7 @@ struct my_ip6hdr
struct in6_addr dst;
};
struct icmphdr
struct my_icmphdr
{
uint8_t type;
uint8_t code;