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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 MULTICAST
-
- 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 MULTICAST
- #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 KERNEL
-