in.h

minix3的源代码

/*
server/ip/gen/in.h
*/

#ifndef __SERVER__IP__GEN__IN_H__
#define __SERVER__IP__GEN__IN_H__

#define IP_MIN_HDR_SIZE		20
#define IP_MAX_HDR_SIZE		60		/* 15 * 4 */
#define IP_VERSION		4
#define IP_DEF_TTL		64
#define IP_MAX_TTL		255
#define IP_DEF_MTU		576
#define IP_MIN_MTU		(IP_MAX_HDR_SIZE+8)
#define IP_MAX_PACKSIZE		40000
	/* Note: this restriction is not part of the IP-protocol but
	   introduced by this implementation. */

#define IPPROTO_ICMP		1
#define IPPROTO_TCP		6
#define IPPROTO_UDP		17

#define IP_MC_ALL_SYSTEMS	0xE0000001	/* 224.0.0.1 */

typedef u32_t ipaddr_t;
typedef u8_t ipproto_t;
typedef struct ip_hdropt
{
	u8_t iho_opt_siz;
	u8_t iho_data[IP_MAX_HDR_SIZE-IP_MIN_HDR_SIZE];
} ip_hdropt_t;

#endif /* __SERVER__IP__GEN__IN_H__ */

/*
 * $PchId: in.h,v 1.6 2002/06/10 07:11:15 philip Exp $
 */