60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/*
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* source in this file came from
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* the Mach ethernet boot written by Leendert van Doorn.
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*
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* Various UDP/IP definitions (see RFC 768, and 791)
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*
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* $Id: inet.h,v 1.2 1993/08/02 17:52:55 mycroft Exp $
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*/
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/* generic IP address */
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#define IP_ANYADDR (ipaddr_t)0 /* IP any address */
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#define IP_BCASTADDR (ipaddr_t)0xffffffff /* IP broadcast address */
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/* some well defined protocols/ports */
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#define IP_PROTO_UDP 17 /* user datagram protocol */
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#define IP_PORT_TFTP 69 /* trivial FTP port */
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/* internet address type */
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typedef u_long ipaddr_t;
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/* internet address type (only used for printing address) */
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typedef union {
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ipaddr_t a;
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struct { u_char a0, a1, a2, a3; } s;
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} inetaddr_t;
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/*
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* Structure of an internet header (without options)
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*/
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typedef struct {
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u_char ip_vhl; /* version and header length */
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#define IP_VERSION 4 /* current version number */
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u_char ip_tos; /* type of service */
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u_short ip_len; /* total length */
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u_short ip_id; /* identification */
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u_short ip_off; /* fragment offset field */
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u_char ip_ttl; /* time to live */
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#define IP_FRAGTTL 60 /* time to live for frags */
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u_char ip_p; /* protocol */
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u_short ip_sum; /* checksum */
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ipaddr_t ip_src; /* source address */
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ipaddr_t ip_dst; /* destination address */
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} iphdr_t;
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/*
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* Structure of an UDP header
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*/
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typedef struct {
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u_short uh_sport; /* source port */
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u_short uh_dport; /* destination port */
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u_short uh_len; /* udp length */
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u_short uh_sum; /* udp checksum */
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} udphdr_t;
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/* these are actually defined in arp.c */
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extern ipaddr_t ip_myaddr; /* my own IP address */
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extern ipaddr_t ip_gateway; /* gateway's IP address */
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void IpPrintAddr(ipaddr_t);
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