126 lines
3.9 KiB
C
Executable File
126 lines
3.9 KiB
C
Executable File
#ifndef _NETINET_IP_H
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#define _NETINET_IP_H
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#include <inttypes.h>
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#include <endian.h>
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#include <netinet/in.h>
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__BEGIN_DECLS
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#define IPVERSION 4 /* IP version number */
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#define IP_MAXPACKET 65535 /* maximum packet size */
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#define IPTOS_TOS_MASK 0x1E
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#define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK)
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#define IPTOS_LOWDELAY 0x10
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#define IPTOS_THROUGHPUT 0x08
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#define IPTOS_RELIABILITY 0x04
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#define IPTOS_MINCOST 0x02
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#define IPTOS_LOWCOST IPTOS_MINCOST
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#define IPTOS_PREC_MASK 0xE0
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#define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK)
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#define IPTOS_PREC_NETCONTROL 0xe0
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#define IPTOS_PREC_INTERNETCONTROL 0xc0
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#define IPTOS_PREC_CRITIC_ECP 0xa0
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#define IPTOS_PREC_FLASHOVERRIDE 0x80
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#define IPTOS_PREC_FLASH 0x60
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#define IPTOS_PREC_IMMEDIATE 0x40
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#define IPTOS_PREC_PRIORITY 0x20
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#define IPTOS_PREC_ROUTINE 0x00
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/* IP options */
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#define IPOPT_COPY 0x80
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#define IPOPT_CLASS_MASK 0x60
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#define IPOPT_NUMBER_MASK 0x1f
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#define IPOPT_COPIED(o) ((o)&IPOPT_COPY)
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#define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK)
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#define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK)
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#define IPOPT_CONTROL 0x00
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#define IPOPT_RESERVED1 0x20
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#define IPOPT_MEASUREMENT 0x40
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#define IPOPT_RESERVED2 0x60
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#define IPOPT_END (0 |IPOPT_CONTROL)
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#define IPOPT_NOOP (1 |IPOPT_CONTROL)
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#define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY)
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#define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY)
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#define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT)
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#define IPOPT_RR (7 |IPOPT_CONTROL)
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#define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY)
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#define IPOPT_SSRR (9 |IPOPT_CONTROL|IPOPT_COPY)
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#define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY)
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#define IPVERSION 4
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#define MAXTTL 255
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#define IPDEFTTL 64
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/* struct timestamp, struct route and MAX_ROUTES are removed.
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REASONS: it is clear that nobody used them because:
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- MAX_ROUTES value was wrong.
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- "struct route" was wrong.
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- "struct timestamp" had fatally misaligned bitfields and was completely unusable.
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*/
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#define IPOPT_OPTVAL 0
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#define IPOPT_OLEN 1
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#define IPOPT_OFFSET 2
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#define IPOPT_MINOFF 4
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#define MAX_IPOPTLEN 40
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#define IPOPT_NOP IPOPT_NOOP
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#define IPOPT_EOL IPOPT_END
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#define IPOPT_TS IPOPT_TIMESTAMP
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#define IPOPT_TS_TSONLY 0 /* timestamps only */
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#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
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#define IPOPT_TS_PRESPEC 3 /* specified modules only */
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struct iphdr { /* size 20/0x14 */
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int ihl:4, version:4; /* offset 0; version=ip version (4) */
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#else
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unsigned int version:4, ihl:4; /* offset 0; ihl=ip header length, measured in words (5) */
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#endif
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unsigned char tos; /* offset 1 */
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unsigned short tot_len; /* offset 2; total bytes in packet in network byte order */
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unsigned short id; /* offset 4 */
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unsigned short frag_off; /* offset 6 */
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unsigned char ttl; /* offset 8 */
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unsigned char protocol; /* offset 9; 1=ICMP, 6=TCP, 17=UDP (see netinet/in.h) */
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unsigned short check; /* offset 10/0xa */
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unsigned int saddr; /* offset 12/0xc */
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unsigned int daddr; /* offset 16/0x10 */
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/*The options start here. */
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};
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struct ip {
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int ip_hl:4; /* header length */
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unsigned int ip_v:4; /* version */
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#endif
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned int ip_v:4; /* version */
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unsigned int ip_hl:4; /* header length */
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#endif
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unsigned char ip_tos; /* type of service */
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unsigned short ip_len; /* total length */
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unsigned short ip_id; /* identification */
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unsigned short ip_off; /* fragment offset field */
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#define IP_RF 0x8000 /* reserved fragment flag */
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#define IP_DF 0x4000 /* dont fragment flag */
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#define IP_MF 0x2000 /* more fragments flag */
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#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
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unsigned char ip_ttl; /* time to live */
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unsigned char ip_p; /* protocol */
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unsigned short ip_sum; /* checksum */
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struct in_addr ip_src, ip_dst; /* source and dest address */
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};
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__END_DECLS
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#endif
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