ip_var.h
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- /*
- * Copyright (c) 1982, 1986, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
- */
- #include <endian.h>
- /*
- * 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; /* XXX overlays ip_tos: use low bit
- * to avoid destroying tos;
- * 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 */
- };
- struct ipstat {
- n_long ips_total; /* total packets received */
- n_long ips_badsum; /* checksum bad */
- n_long ips_tooshort; /* packet too short */
- n_long ips_toosmall; /* not enough data */
- n_long ips_badhlen; /* ip header length < data size */
- n_long ips_badlen; /* ip length < ip header length */
- n_long ips_fragments; /* fragments received */
- n_long ips_fragdropped; /* frags dropped (dups, out of space) */
- n_long ips_fragtimeout; /* fragments timed out */
- n_long ips_forward; /* packets forwarded */
- n_long ips_cantforward; /* packets rcvd for unreachable dest */
- n_long ips_redirectsent; /* packets forwarded on same net */
- n_long ips_noproto; /* unknown or unsupported protocol */
- n_long ips_delivered; /* datagrams delivered to upper level*/
- n_long ips_localout; /* total ip packets generated here */
- n_long ips_odropped; /* lost packets due to nobufs, etc. */
- n_long ips_reassembled; /* total packets reassembled ok */
- n_long ips_fragmented; /* datagrams sucessfully fragmented */
- n_long ips_ofragments; /* output fragments created */
- n_long ips_cantfrag; /* don't fragment flag was set, etc. */
- n_long ips_badoptions; /* error in option processing */
- n_long ips_noroute; /* packets discarded due to no route */
- n_long ips_badvers; /* ip version != 4 */
- n_long ips_rawout; /* total raw ip packets generated */
- };
- #ifdef KERNEL
- /* flags passed to ip_output as last parameter */
- #define IP_FORWARDING 0x1 /* most of ip header exists */
- #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
- #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 */
- int ip_defttl; /* default IP ttl */
- int in_control __P((struct socket *, n_long, caddr_t, struct ifnet *));
- int ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
- void ip_deq __P((struct ipasfrag *));
- int ip_dooptions __P((struct mbuf *));
- void ip_drain __P((void));
- void ip_enq __P((struct ipasfrag *, struct ipasfrag *));
- void ip_forward __P((struct mbuf *, int));
- void ip_freef __P((struct ipq *));
- void ip_freemoptions __P((struct ip_moptions *));
- int ip_getmoptions __P((int, struct ip_moptions *, struct mbuf **));
- void ip_init __P((void));
- int ip_mforward __P((struct mbuf *, struct ifnet *));
- int ip_optcopy __P((struct ip *, struct ip *));
- int ip_output __P((struct mbuf *,
- struct mbuf *, struct route *, int, struct ip_moptions *));
- int ip_pcbopts __P((struct mbuf **, struct mbuf *));
- struct ip *
- ip_reass __P((struct ipasfrag *, struct ipq *));
- struct in_ifaddr *
- ip_rtaddr __P((struct in_addr));
- int ip_setmoptions __P((int, struct ip_moptions **, struct mbuf *));
- void ip_slowtimo __P((void));
- struct mbuf *
- ip_srcroute __P((void));
- void ip_stripoptions __P((struct mbuf *, struct mbuf *));
- int ip_sysctl __P((int *, n_long, void *, size_t *, void *, size_t));
- void ipintr __P((void));
- int rip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
- void rip_init __P((void));
- void rip_input __P((struct mbuf *));
- int rip_output __P((struct mbuf *, struct socket *, n_long));
- int rip_usrreq __P((struct socket *,
- int, struct mbuf *, struct mbuf *, struct mbuf *));
- #endif