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/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)ip_var.h 7.5 (Berkeley) 6/29/88 plus MULTICAST 1.0
*/
/*
* Overlay for ip header used by other protocols (tcp, udp).
*/
struct ipovly {
caddr_t ih_next, ih_prev; /* for protocol sequence q's */
u_char ih_x1; /* (unused) */
u_char ih_pr; /* protocol */
short ih_len; /* protocol length */
struct in_addr ih_src; /* source internet address */
struct in_addr ih_dst; /* destination internet address */
};
/*
* Ip reassembly queue structure. Each fragment
* being reassembled is attached to one of these structures.
* They are timed out after ipq_ttl drops to 0, and may also
* be reclaimed if memory becomes tight.
*/
struct ipq {
struct ipq *next,*prev; /* to other reass headers */
u_char ipq_ttl; /* time for reass q to live */
u_char ipq_p; /* protocol of this fragment */
u_short ipq_id; /* sequence id for reassembly */
struct ipasfrag *ipq_next,*ipq_prev;
/* to ip headers of fragments */
struct in_addr ipq_src,ipq_dst;
};
/*
* Ip header, when holding a fragment.
*
* Note: ipf_next must be at same offset as ipq_next above
*/
struct ipasfrag {
#if BYTE_ORDER == LITTLE_ENDIAN
u_char ip_hl:4,
ip_v:4;
#endif
#if BYTE_ORDER == BIG_ENDIAN
u_char ip_v:4,
ip_hl:4;
#endif
u_char ipf_mff; /* copied from (ip_off&IP_MF) */
short ip_len;
u_short ip_id;
short ip_off;
u_char ip_ttl;
u_char ip_p;
u_short ip_sum;
struct ipasfrag *ipf_next; /* next fragment */
struct ipasfrag *ipf_prev; /* previous fragment */
};
/*
* Structure stored in mbuf in inpcb.ip_options
* and passed to ip_output when ip options are in use.
* The actual length of the options (including ipopt_dst)
* is in m_len.
*/
#define MAX_IPOPTLEN 40
struct ipoption {
struct in_addr ipopt_dst; /* first-hop dst if source routed */
char ipopt_list[MAX_IPOPTLEN]; /* options proper */
};
#ifdef MULTICAST
/*
* Structure stored in an mbuf attached to inpcb.ip_moptions and
* passed to ip_output when IP multicast options are in use.
*/
struct ip_moptions {
struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
u_char imo_multicast_loop; /* 1 => hear sends if a member */
u_short imo_num_memberships;/* no. memberships this socket */
struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
};
#endif
struct ipstat {
long ips_total; /* total packets received */
long ips_badsum; /* checksum bad */
long ips_tooshort; /* packet too short */
long ips_toosmall; /* not enough data */
long ips_badhlen; /* ip header length < data size */
long ips_badlen; /* ip length < ip header length */
long ips_fragments; /* fragments received */
long ips_fragdropped; /* frags dropped (dups, out of space) */
long ips_fragtimeout; /* fragments timed out */
long ips_forward; /* packets forwarded */
long ips_cantforward; /* packets rcvd for unreachable dest */
long ips_redirectsent; /* packets forwarded on same net */
};
#ifdef KERNEL
/* flags passed to ip_output as last parameter */
#define IP_FORWARDING 0x1 /* most of ip header exists */
#ifdef MULTICAST
#define IP_MULTICASTOPTS 0x2 /* multicast opts present */
#endif
#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
struct ipstat ipstat;
struct ipq ipq; /* ip reass. queue */
u_short ip_id; /* ip packet ctr, for ids */
struct mbuf *ip_srcroute();
#endif
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.