126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/* $NetBSD: ip_var.h,v 1.3 2004/03/28 09:00:56 martti Exp $ */
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/* @(#)ip_var.h 1.11 88/08/19 SMI; from UCB 7.1 6/5/86 */
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/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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/*
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* Overlay for ip header used by other protocols (tcp, udp).
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*/
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#ifndef _netinet_ip_var_h
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#define _netinet_ip_var_h
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struct ipovly {
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caddr_t ih_next, ih_prev; /* for protocol sequence q's */
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u_char ih_x1; /* (unused) */
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u_char ih_pr; /* protocol */
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short ih_len; /* protocol length */
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struct in_addr ih_src; /* source internet address */
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struct in_addr ih_dst; /* destination internet address */
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};
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/*
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* Ip reassembly queue structure. Each fragment
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* being reassembled is attached to one of these structures.
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* They are timed out after ipq_ttl drops to 0, and may also
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* be reclaimed if memory becomes tight.
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*/
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struct ipq {
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struct ipq *next,*prev; /* to other reass headers */
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u_char ipq_ttl; /* time for reass q to live */
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u_char ipq_p; /* protocol of this fragment */
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u_short ipq_id; /* sequence id for reassembly */
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struct ipasfrag *ipq_next,*ipq_prev;
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/* to ip headers of fragments */
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struct in_addr ipq_src,ipq_dst;
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};
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/*
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* Ip header, when holding a fragment.
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*
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* Note: ipf_next must be at same offset as ipq_next above
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*/
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struct ipasfrag {
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#if defined(vax) || defined(i386)
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u_char ip_hl:4,
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ip_v:4;
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#endif
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#if defined(mc68000) || defined(sparc)
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u_char ip_v:4,
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ip_hl:4;
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#endif
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u_char ipf_mff; /* copied from (ip_off&IP_MF) */
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short ip_len;
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u_short ip_id;
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short ip_off;
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u_char ip_ttl;
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u_char ip_p;
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u_short ip_sum;
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struct ipasfrag *ipf_next; /* next fragment */
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struct ipasfrag *ipf_prev; /* previous fragment */
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};
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/*
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* Structure stored in mbuf in inpcb.ip_options
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* and passed to ip_output when ip options are in use.
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* The actual length of the options (including ipopt_dst)
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* is in m_len.
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*/
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#define MAX_IPOPTLEN 40
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struct ipoption {
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struct in_addr ipopt_dst; /* first-hop dst if source routed */
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char ipopt_list[MAX_IPOPTLEN]; /* options proper */
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};
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/*
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* Structure stored in an mbuf attached to inpcb.ip_moptions and
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* passed to ip_output when IP multicast options are in use.
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*/
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struct ip_moptions {
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struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
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u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
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u_char imo_multicast_loop; /* 1 => hear sends if a member */
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u_short imo_num_memberships;/* no. memberships this socket */
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struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
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#ifdef RSVP_ISI
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long imo_multicast_vif; /* vif for outgoing multicasts */
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#endif /* RSVP_ISI */
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};
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struct ipstat {
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long ips_total; /* total packets received */
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long ips_badsum; /* checksum bad */
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long ips_tooshort; /* packet too short */
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long ips_toosmall; /* not enough data */
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long ips_badhlen; /* ip header length < data size */
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long ips_badlen; /* ip length < ip header length */
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long ips_fragments; /* fragments received */
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long ips_fragdropped; /* frags dropped (dups, out of space) */
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long ips_fragtimeout; /* fragments timed out */
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long ips_forward; /* packets forwarded */
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long ips_cantforward; /* packets rcvd for unreachable dest */
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long ips_redirectsent; /* packets forwarded on same net */
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};
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#ifdef KERNEL
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/* flags passed to ip_output as last parameter */
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#define IP_FORWARDING 0x1 /* most of ip header exists */
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#define IP_MULTICASTOPTS 0x2 /* multicast opts present */
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#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
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#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
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struct ipstat ipstat;
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struct ipq ipq; /* ip reass. queue */
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u_short ip_id; /* ip packet ctr, for ids */
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struct mbuf *ip_srcroute();
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#endif
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#endif /*!_netinet_ip_var_h*/
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