ip_var.h revision 145511
1/* $NetBSD$ */ 2 3/* @(#)ip_var.h 1.11 88/08/19 SMI; from UCB 7.1 6/5/86 */ 4 5/* 6 * Copyright (c) 1982, 1986 Regents of the University of California. 7 * All rights reserved. The Berkeley software License Agreement 8 * specifies the terms and conditions for redistribution. 9 */ 10 11/* 12 * Overlay for ip header used by other protocols (tcp, udp). 13 */ 14 15#ifndef _netinet_ip_var_h 16#define _netinet_ip_var_h 17 18struct ipovly { 19 caddr_t ih_next, ih_prev; /* for protocol sequence q's */ 20 u_char ih_x1; /* (unused) */ 21 u_char ih_pr; /* protocol */ 22 short ih_len; /* protocol length */ 23 struct in_addr ih_src; /* source internet address */ 24 struct in_addr ih_dst; /* destination internet address */ 25}; 26 27/* 28 * Ip reassembly queue structure. Each fragment 29 * being reassembled is attached to one of these structures. 30 * They are timed out after ipq_ttl drops to 0, and may also 31 * be reclaimed if memory becomes tight. 32 */ 33struct ipq { 34 struct ipq *next,*prev; /* to other reass headers */ 35 u_char ipq_ttl; /* time for reass q to live */ 36 u_char ipq_p; /* protocol of this fragment */ 37 u_short ipq_id; /* sequence id for reassembly */ 38 struct ipasfrag *ipq_next,*ipq_prev; 39 /* to ip headers of fragments */ 40 struct in_addr ipq_src,ipq_dst; 41}; 42 43/* 44 * Ip header, when holding a fragment. 45 * 46 * Note: ipf_next must be at same offset as ipq_next above 47 */ 48struct ipasfrag { 49#if defined(vax) || defined(i386) 50 u_char ip_hl:4, 51 ip_v:4; 52#endif 53#if defined(mc68000) || defined(sparc) 54 u_char ip_v:4, 55 ip_hl:4; 56#endif 57 u_char ipf_mff; /* copied from (ip_off&IP_MF) */ 58 short ip_len; 59 u_short ip_id; 60 short ip_off; 61 u_char ip_ttl; 62 u_char ip_p; 63 u_short ip_sum; 64 struct ipasfrag *ipf_next; /* next fragment */ 65 struct ipasfrag *ipf_prev; /* previous fragment */ 66}; 67 68/* 69 * Structure stored in mbuf in inpcb.ip_options 70 * and passed to ip_output when ip options are in use. 71 * The actual length of the options (including ipopt_dst) 72 * is in m_len. 73 */ 74#define MAX_IPOPTLEN 40 75 76struct ipoption { 77 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 78 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 79}; 80 81/* 82 * Structure stored in an mbuf attached to inpcb.ip_moptions and 83 * passed to ip_output when IP multicast options are in use. 84 */ 85struct ip_moptions { 86 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 87 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 88 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 89 u_short imo_num_memberships;/* no. memberships this socket */ 90 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 91#ifdef RSVP_ISI 92 long imo_multicast_vif; /* vif for outgoing multicasts */ 93#endif /* RSVP_ISI */ 94}; 95 96struct ipstat { 97 long ips_total; /* total packets received */ 98 long ips_badsum; /* checksum bad */ 99 long ips_tooshort; /* packet too short */ 100 long ips_toosmall; /* not enough data */ 101 long ips_badhlen; /* ip header length < data size */ 102 long ips_badlen; /* ip length < ip header length */ 103 long ips_fragments; /* fragments received */ 104 long ips_fragdropped; /* frags dropped (dups, out of space) */ 105 long ips_fragtimeout; /* fragments timed out */ 106 long ips_forward; /* packets forwarded */ 107 long ips_cantforward; /* packets rcvd for unreachable dest */ 108 long ips_redirectsent; /* packets forwarded on same net */ 109}; 110 111#ifdef KERNEL 112/* flags passed to ip_output as last parameter */ 113#define IP_FORWARDING 0x1 /* most of ip header exists */ 114#define IP_MULTICASTOPTS 0x2 /* multicast opts present */ 115#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 116#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 117 118struct ipstat ipstat; 119struct ipq ipq; /* ip reass. queue */ 120u_short ip_id; /* ip packet ctr, for ids */ 121 122struct mbuf *ip_srcroute(); 123#endif 124 125#endif /*!_netinet_ip_var_h*/ 126