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C/C++ Source or Header | 1992-08-07 | 17.8 KB | 602 lines

/* * netInet.h -- * * Declarations of data structures and constants for the DARPA Internet * protocol suite. * * Copyright 1987, 1988 Regents of the University of California * Permission to use, copy, modify, and distribute this * software and its documentation for any purpose and without * fee is hereby granted, provided that the above copyright * notice appear in all copies. The University of California * makes no representations about the suitability of this * software for any purpose. It is provided "as is" without * express or implied warranty. * * $Header: /sprite/src/lib/include/RCS/netInet.h,v 1.7 92/08/05 16:34:23 jhh Exp $ SPRITE (Berkeley) */ #ifndef _NETINET #define _NETINET #include "machparam.h" #include "netEther.h" /* * Definition of the 32-bit Internet Address. */ typedef unsigned int Net_InetAddress; /* * Net_InetAddrCmp -- * * Compare two internet addresses. Returns 0 if they are the same, 1 otherwise. */ #define Net_InetAddrCmp(a,b) ((a) != (b)) #define Net_InetAddrCopy(src, dest) ((dest) = (src)) /* * Structure of the Ethernet Address Resolution Protocol and Reverse ARP * packets, according to RFC826 (ARP) and RFC903 (RARP). */ typedef struct { unsigned short hardwareType; /* "Hardware address space (e.g. * Ethernet, Packet Radio Net.)" */ unsigned short protocolType; /* "Protocol Address Space" * specifies format of protocol * addresses. Value is one * of the defined packet types * in netEther.h. */ unsigned char hardwareAddrLen; /* length in bytes of hardware * addresses. */ unsigned char protocolAddrLen; /* length in bytes of protocol * addresses. */ unsigned short opcode; /* see below. */ } Net_ArpHeader; typedef struct { Net_EtherHdr header; /* packet header */ unsigned short hardwareType; /* "Hardware address space (e.g. * Ethernet, Packet Radio Net.)" */ unsigned short protocolType; /* "Protocol Address Space" * specifies format of protocol * addresses. Value is one * of the defined packet types * in netEther.h. */ unsigned char hardwareAddrLen; /* length in bytes of hardware * addresses. */ unsigned char protocolAddrLen; /* length in bytes of protocol * addresses. */ unsigned short opcode; /* see below. */ Net_EtherAddress senderEtherAddr; /* hardware address of sender * of the packet. */ Net_InetAddress senderProtAddr; /* protocol address of sender * of the packet. */ Net_EtherAddress targetEtherAddr; /* hardware address of target * (if known). */ Net_InetAddress targetProtAddr; /* protocol address of target.*/ } Net_ArpPacket; /* * Value for the hardwareType field in Net_ArpPacket. * NET_ARP_TYPE_ETHER using ethernet hardware. */ #define NET_ARP_TYPE_ETHER 1 /* * Values for the opcode field in Net_ArpPacket: * NET_ARP_REQUEST request ethernet address for a given IP address. * NET_ARP_REPLY answer for above request. * NET_RARP_REQUEST request IP address for a given ethernet address. * NET_RARP_REPLY answer for above request. */ #define NET_ARP_REQUEST 1 #define NET_ARP_REPLY 2 #define NET_RARP_REQUEST 3 #define NET_RARP_REPLY 4 #define NET_INET_BROADCAST_ADDR ((Net_InetAddress) 0xFFFFFFFF) #define NET_INET_ANY_ADDR ((Net_InetAddress) 0) #define NET_INET_CLASS_A_ADDR(addr) \ (((unsigned int)(addr) & 0x80000000) == 0) #define NET_INET_CLASS_A_HOST_MASK 0x00FFFFFF #define NET_INET_CLASS_A_NET_MASK 0xFF000000 #define NET_INET_CLASS_A_SHIFT 24 #define NET_INET_CLASS_B_ADDR(addr) \ (((unsigned int)(addr) & 0xC0000000) == 0x80000000) #define NET_INET_CLASS_B_HOST_MASK 0x0000FFFF #define NET_INET_CLASS_B_NET_MASK 0xFFFF0000 #define NET_INET_CLASS_B_SHIFT 16 #define NET_INET_CLASS_C_ADDR(addr) \ (((unsigned int)(addr) & 0xE0000000) == 0xC0000000) #define NET_INET_CLASS_C_HOST_MASK 0x000000FF #define NET_INET_CLASS_C_NET_MASK 0xFFFFFF00 #define NET_INET_CLASS_C_SHIFT 8 /* * Class D: multicast addressing (see RFC988, RFC966). */ #define NET_INET_CLASS_D_ADDR(addr) \ (((unsigned int)(addr) & 0xF0000000) == 0xE0000000) #define NET_INET_CLASS_D_NET_MASK 0x0FFFFFFF /* * Class E: reserved. */ #define NET_INET_CLASS_E_ADDR(addr) \ (((unsigned int)(addr) & 0xF0000000) == 0xF0000000) /* * Synonym address for the local host. */ #define NET_INET_LOCAL_HOST 0x7F000001 /* * Structure of an Internet packet header, according to RFC791. */ typedef struct { #if BYTE_ORDER == LITTLE_ENDIAN unsigned int headerLen:4, /* Length of header in 32-bit words. */ version:4; /* Version. Defined below. */ #else unsigned int version:4, headerLen:4; #endif unsigned char typeOfService; /* See below. */ unsigned short totalLen; /* Length in bytes of the * datagram including header and data.*/ unsigned short ident; /* Used for fragmentation reassembly. */ #if BYTE_ORDER == LITTLE_ENDIAN unsigned int fragOffset:13, /* Offset from beginning of unfragmented * packet. */ flags:3; /* Fragment flags. See below. */ #else unsigned int flags:3, fragOffset:13; #endif unsigned char timeToLive; /* Max. time the packet is allowed to * be in the internet system. When TTL * goes to 0, the packet is destroyed.*/ unsigned char protocol; /* Protocol used in the data portion. * Defined below. */ unsigned short checksum; /* Checksum of the header. */ Net_InetAddress source; /* Source of the packet. */ Net_InetAddress dest; /* Destination of the packet. */ /* * Options may follow at this point, before the data. */ } Net_IPHeader; /* * IP Pseudo Header is used by UDP and TCP checksums to make sure * the packet is not mis-routed. */ typedef struct { Net_InetAddress source; /* Source of the packet. */ Net_InetAddress dest; /* Destination of the packet. */ unsigned char zero; /* must be zero. */ unsigned char protocol; /* Protocol # (UDP, TCP). */ unsigned short len; /* # of bytes in header and data. */ } Net_IPPseudoHdr; #define NET_IP_VERSION 4 #define NET_IP_MAX_HDR_SIZE 60 /* * IP implementation parameters: * NET_IP_MAX_TTL - Max. value for timeToLive field (in seconds). * NET_IP_MAX_FRAG_TTL - Max. time-to-live for fragments. * NET_IP_TTL_DECR - The value ttl is decremented by when a * packet is forwarded. * NET_IP_MAX_SEG_SIZE - Max. segment size. * NET_IP_MAX_PACKET_SIZE - Largest packet size. */ #define NET_IP_MAX_TTL 255 #define NET_IP_MAX_FRAG_TTL 15 #define NET_IP_TTL_DECR 1 #define NET_IP_MAX_SEG_SIZE 576 #define NET_IP_MAX_PACKET_SIZE 65535 /* * Definitions of the typeOfService flags in the Internet header. * According to p. 12 of RFC791, the type of service field has the * the following subfields: * precedence: bits 0-2 (most sig. bits) * delay bit 3 * thruput bit 4 * reliability bit 5 * reserved bit 6-7 (least sig. bits) * The value must be composed of the OR of one flag from each of the following * groups: */ #define NET_IP_SERV_PREC_NET_CTL 0xE0 #define NET_IP_SERV_PREC_INET_CTL 0xC0 #define NET_IP_SERV_PREC_CRITIC 0xA0 #define NET_IP_SERV_PREC_FLASH_OVR 0x80 #define NET_IP_SERV_PREC_FLASH 0x60 #define NET_IP_SERV_PREC_IMMED 0x40 #define NET_IP_SERV_PREC_PRIORITY 0x20 #define NET_IP_SERV_PREC_ROUTINE 0x00 #define NET_IP_SERV_NORM_DELAY 0x00 #define NET_IP_SERV_LOW_DELAY 0x10 #define NET_IP_SERV_NORM_THRUPUT 0x00 #define NET_IP_SERV_HIGH_THRUPUT 0x08 #define NET_IP_SERV_NORM_RELIABL 0x00 #define NET_IP_SERV_HIGH_RELIABL 0x04 /* * Values for the flags field in the IP header. * NET_IP_LAST_FRAG last fragment of the bunch. implies the * packet can be fragmented if necessary. * NET_IP_MORE_FRAGS expect more fragments. * NET_IP_DONT_FRAG the can't be fragmented so discard if can't * transmit. * * The high-order bit of the field must be 0. */ #define NET_IP_LAST_FRAG 0x0 #define NET_IP_MORE_FRAGS 0x1 #define NET_IP_DONT_FRAG 0x2 /* * Values for the protocol field in the IP packet header from RFC990. * The RFC does not assign a number for IP, so we use 0 (even though * it is reserved). */ #define NET_IP_PROTOCOL_IP 0 #define NET_IP_PROTOCOL_ICMP 1 #define NET_IP_PROTOCOL_TCP 6 #define NET_IP_PROTOCOL_EGP 8 #define NET_IP_PROTOCOL_UDP 17 #define NET_IP_PROTOCOL_SPRITE 90 /* * Definitions of IP options. * There are two formats for the options: * 1) single octet of option-type. * 2) an option-type octet, an option length, and the actual data octets. * * The option type is composed of 3 fields: copied flag (1 bit), * option class (2 bits), and an option number (5 bits). */ /* * Definitions of offsets within an option for the type, length and next- * option-offset octets. The minimum value for the next-option offset * ("pointer") is 4. The pointer is used in the 3 routing options and * the timestamp option. */ #define NET_IP_OPT_TYPE_OFFSET 0 #define NET_IP_OPT_LEN_OFFSET 1 #define NET_IP_OPT_PTR_OFFSET 2 #define NET_IP_OPT_MIN_PTR 4 #define NET_IP_OPT_MAX_LEN 40 /* * Macros to access the option-type fields. * NET_IP_OPT_COPIED - 0 means not copied, 1 means copied. * NET_IP_OPT_CLASS - see below. * NET_IP_OPT_NUMBER - see below. */ #define NET_IP_OPT_COPIED(opt) ((opt) & 0x80) #define NET_IP_OPT_CLASS(opt) ((opt) & 0x60) #define NET_IP_OPT_NUMBER(opt) ((opt) & 0x1f) /* * Values for NET_IP_OPT_CLASS as masks. */ #define NET_IP_OPT_CLASS_CONTROL 0x00 #define NET_IP_OPT_CLASS_RESERVED1 0x20 #define NET_IP_OPT_CLASS_DEBUG 0x40 #define NET_IP_OPT_CLASS_RESERVED2 0x60 /* * Complete values for the option types, including the copied and class fields * as well as the number field. The definitions are listed in the same * order as described in RFC791, p. 16ff. */ #define NET_IP_OPT_END_OF_LIST 0x00 #define NET_IP_OPT_NOP 0x01 #define NET_IP_OPT_SECURITY 0x82 #define NET_IP_OPT_LOOSE_ROUTE 0x83 #define NET_IP_OPT_STRICT_ROUTE 0x89 #define NET_IP_OPT_REC_ROUTE 0x07 #define NET_IP_OPT_STREAM_ID 0x88 #define NET_IP_OPT_TIMESTAMP 0x44 /* * Foramt of the timestamp option header. */ typedef struct { unsigned char type; unsigned char len; /* Total len of option. */ unsigned char pointer; /* Offset into option where * to add t.s. */ #if BYTE_ORDER == LITTLE_ENDIAN unsigned int flags:4, /* Defined below. */ overflow:4; /* # of hosts who weren't * able to add a t.s. */ #else unsigned int overflow:4, flags:4; #endif } Net_IPTimestampHdr; /* * Values of the flags field in Net_IPTimestampHdr. */ #define NET_IP_OPT_TS_ONLY 0 #define NET_IP_OPT_TS_AND_ADDR 1 #define NET_IP_OPT_TS_ADDR_SPEC 3 /* * Interet time value is a "right-justified, 32-bit" time in milliseconds * since midnight Universal Time (UT). */ typedef int Net_InetTime; /* * Structure of an TCP packet header, according to RFC793. */ typedef struct { unsigned short srcPort; /* Source port # */ unsigned short destPort; /* Destination port # */ unsigned int seqNum; /* Seq. # of 1st byte in the segment */ unsigned int ackNum; /* Next seq. # we expect */ #if BYTE_ORDER == LITTLE_ENDIAN unsigned int reserved1:4, /* Must be zero. */ dataOffset:4, /* # of 32-bit words in this header */ flags:6, /* Control flags, define below. */ reserved2:2; /* Must be zero */ #else unsigned int dataOffset:4, reserved:6, flags:6; #endif unsigned short window; /* # of bytes we are willing to accept*/ unsigned short checksum; /* Checksum of IP pseudo-header, * TCP header and data. */ unsigned short urgentOffset; /* Start of urgent data as an offset * from the seq. # of this segment. */ } Net_TCPHeader; #define NET_TCP_MAX_HDR_SIZE 60 #define NET_TCP_TTL 30 /* * TCP header control flags: (p. 16, rfc793) * * URG - Urgent Pointer field significant * ACK - Acknowledgment field significant * PSH - Push Function * RST - Reset the connection * SYN - Synchronize sequence numbers * FIN - No more data from sender */ #define NET_TCP_FIN_FLAG 0x01 #define NET_TCP_SYN_FLAG 0x02 #define NET_TCP_RST_FLAG 0x04 #define NET_TCP_PSH_FLAG 0x08 #define NET_TCP_ACK_FLAG 0x10 #define NET_TCP_URG_FLAG 0x20 /* * TCP options flags: (p. 16, rfc793) * EOL - End of option list * NOP - No-operation * MAX_SEG_SIZE - Maximum segment size */ #define NET_TCP_OPTION_EOL 0x0 #define NET_TCP_OPTION_NOP 0x1 #define NET_TCP_OPTION_MAX_SEG_SIZE 0x2 #define NET_TCP_MAX_SEG_SIZE 512 /* * Structure of an UDP packet header, according to RFC768. */ typedef struct { unsigned short srcPort; /* Source port. */ unsigned short destPort; /* Destination port. */ unsigned short len; /* # of bytes in header and data. */ unsigned short checksum; /* Checksum of IP pseudo-header, * UDP header and data. */ } Net_UDPHeader; #define NET_UDP_TTL 30 /* * Structure of various ICMP packets, according to RFC792. * The data structures for ICMP data is broken into 2 parts: * a 4-byte header that is common to all ICMP packet types and * a type-dependent data part. * * The packets that include the IP header + the first 64 bits of data * consist of the basic header, plus room for the header options followed * by space for the data. Enough space to hold the maximum amount of * header options is reserved; if the size of the options is smaller than * maximum, the 64 bits of data will be placed immediately after the end * of the options. Therefore the "char data[8]" field is there to reserve * space in case of a maximum-sized header is present. */ typedef struct { unsigned char type; /* Type of message, define below. */ unsigned char code; /* Type sub code, define below. */ unsigned short checksum; /* Checksum of ICMP message. */ } Net_ICMPHeader; /* * Data for "Destination unreachable", "Time exceeded", * "Source Quench" messages. */ typedef struct { int unused; Net_IPHeader ipHeader; char hdrOptions[NET_IP_MAX_HDR_SIZE - sizeof(Net_IPHeader)]; char data[8]; } Net_ICMPDataMisc; /* * Data for "Redirect" message. */ typedef struct { Net_InetAddress gatewayAddr; Net_IPHeader ipHeader; char hdrOptions[NET_IP_MAX_HDR_SIZE - sizeof(Net_IPHeader)]; char data[8]; } Net_ICMPDataRedir; /* * Data for "Parameter Problem" message. */ typedef struct { unsigned char paramOffset; char unused1; short unused2; Net_IPHeader ipHeader; char hdrOptions[NET_IP_MAX_HDR_SIZE - sizeof(Net_IPHeader)]; char data[8]; } Net_ICMPDataParam; /* * Data for "Information Request", "Information Reply", "Echo" and "Echo Reply" * messages. The echo messages also have additional data following. */ typedef struct { unsigned short id; unsigned short seqNum; } Net_ICMPDataInfoEcho; /* * Data for "Address Mask Request" and "Address Mask Reply" messages. */ typedef struct { unsigned short id; unsigned short seqNum; unsigned int addrMask; } Net_ICMPDataMask; /* * Data for "Timestamp" and "Timestamp Reply" message. */ typedef struct { unsigned short id; unsigned short seqNum; unsigned int origTime; unsigned int recvTime; unsigned int transmitTime; } Net_ICMPDataTime; /* * A complete definition of an ICMP packet. */ typedef struct { Net_ICMPHeader header; union { Net_ICMPDataMisc overlay; /* used to format packets that * return the IP header & data*/ Net_ICMPDataMisc unreach; /* NET_ICMP_UNREACHABLE */ Net_ICMPDataMisc timeExceed; /* NET_ICMP_TIME_EXCEED */ Net_ICMPDataMisc quench; /* NET_ICMP_SOURCE_QUENCH */ Net_ICMPDataParam param; /* NET_ICMP_PARAM_PROB */ Net_ICMPDataRedir redirect; /* NET_ICMP_REDIRECT */ Net_ICMPDataTime timeStamp; /* NET_ICMP_TIMESTAMP, _REPLY */ Net_ICMPDataMask mask; /* NET_ICMP_MASK_REQ, _REPLY */ Net_ICMPDataInfoEcho info; /* NET_ICMP_INFO_REQ , _REPLY */ Net_ICMPDataInfoEcho echo; /* NET_ICMP_ECHO, _REPLY */ } data; } Net_ICMPPacket; #define NET_ICMP_MIN_LEN 8 /* * Definition of type and code field values. */ #define NET_ICMP_ECHO_REPLY 0 /* Echo reply */ #define NET_ICMP_UNREACHABLE 3 /* Dest unreachable, codes: */ #define NET_ICMP_UNREACH_NET 0 /* - Bad net */ #define NET_ICMP_UNREACH_HOST 1 /* - Bad host */ #define NET_ICMP_UNREACH_PROTOCOL 2 /* - Bad protocol */ #define NET_ICMP_UNREACH_PORT 3 /* - Bad port */ #define NET_ICMP_UNREACH_NEED_FRAG 4 /* - IP_DF caused drop */ #define NET_ICMP_UNREACH_SRC_ROUTE 5 /* - Source route failed */ #define NET_ICMP_SOURCE_QUENCH 4 /* Source quench */ #define NET_ICMP_REDIRECT 5 /* Shorter route, codes: */ #define NET_ICMP_REDIRECT_NET 0 /* - For network */ #define NET_ICMP_REDIRECT_HOST 1 /* - For host */ #define NET_ICMP_REDIRECT_TOS_NET 2 /* - For type of service and * net. */ #define NET_ICMP_REDIRECT_TOS_HOST 3 /* - For type of service and * host. */ #define NET_ICMP_ECHO 8 /* Echo service */ #define NET_ICMP_TIME_EXCEED 11 /* Time exceeded, code: */ #define NET_ICMP_TIME_EXCEED_TTL 0 /* - ttl==0 in transit */ #define NET_ICMP_TIME_EXCEED_REASS 1 /* - ttl==0 in reassembly */ #define NET_ICMP_PARAM_PROB 12 /* IP header bad */ #define NET_ICMP_TIMESTAMP 13 /* Timestamp request */ #define NET_ICMP_TIMESTAMP_REPLY 14 /* Timestamp reply */ #define NET_ICMP_INFO_REQ 15 /* Information request */ #define NET_ICMP_INFO_REPLY 16 /* Information reply */ #define NET_ICMP_MASK_REQ 17 /* Address mask request */ #define NET_ICMP_MASK_REPLY 18 /* Address mask reply */ #define NET_ICMP_MAX_TYPE 18 /* * Definition of a socket address. To be compatible with the Unix sockaddr_in * structure, there are address family and padding fields. They aren't used * by the Sprite Internet server. */ typedef struct { short addrFamily; /* For Unix compatibilty, == AF_INET */ unsigned short port; Net_InetAddress address; char padding[8]; /* Not used. */ } Net_InetSocketAddr; #endif /* _NETINET */