43 struct ip {  struct
45 	unsigned int ip_hl:4;  argument
46 	unsigned int ip_v:4;  argument
51 	uint8_t ip_tos;  argument
52 	uint16_t ip_len;  argument
53 	uint16_t ip_id;  argument
54 	uint16_t ip_off;  argument
55 	uint8_t ip_ttl;  argument
56 	uint8_t ip_p;  argument
57 	uint16_t ip_sum;  argument
58 	struct in_addr ip_src, ip_dst;  argument