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internet.h
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C/C++ Source or Header
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1992-05-14
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2KB
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70 lines
/* @(#) $Header: internet.h,v 1.6 92/05/14 13:20:07 deyke Exp $ */
#ifndef _INTERNET_H
#define _INTERNET_H
#ifndef _GLOBAL_H
#include "global.h"
#endif
/* Global structures and constants pertaining to the interface between IP and
* higher level protocols
*/
/* IP protocol field values */
#define ICMP_PTCL 1 /* Internet Control Message Protocol */
#define TCP_PTCL 6 /* Transmission Control Protocol */
#define UDP_PTCL 17 /* User Datagram Protocol */
#define AX25_PTCL 93 /* AX.25 inside IP according to RFC-1226 */
#define IP_PTCL 94 /* IP inside IP */
#define MAXTTL 255 /* Maximum possible IP time-to-live value */
/* DoD-style precedences */
#define IP_PRECEDENCE 0xe0 /* Mask for precedence field */
#define ROUTINE 0x00
#define PRIORITY 0x20
#define IMMEDIATE 0x40
#define FLASH 0x60
#define FLASH_OVER 0x80
#define CRITIC 0xa0
#define INET_CTL 0xc0
#define NET_CTL 0xe0
/* Amateur-style precedences */
#define AM_ROUTINE 0x00
#define AM_WELFARE 0x20
#define AM_PRIORITY 0x40
#define AM_EMERGENCY 0x60
/* Class-of-service bits */
#define IP_COS 0x1c /* Mask for class-of-service bits */
#define LOW_DELAY 0x10
#define THROUGHPUT 0x08
#define RELIABILITY 0x04
/* IP TOS fields */
#define PREC(x) (((x)>>5) & 0x7)
#define DELAY 0x10
#define THRUPUT 0x8
#define RELIABLITY 0x4
/* Pseudo-header for TCP and UDP checksumming */
struct pseudo_header {
int32 source; /* IP source */
int32 dest; /* IP destination */
char protocol; /* Protocol */
int16 length; /* Data field length */
};
#define NULLHEADER (struct pseudo_header *)0
/* Format of a MIB entry for statistics gathering */
struct mib_entry {
char *name;
struct {
int32 integer;
} value;
};
#endif /* _INTERNET_H */