/* $OpenBSD: ip_var.h,v 1.33 2005/05/27 04:55:28 mcbride Exp $ */ /* $NetBSD: ip_var.h,v 1.16 1996/02/13 23:43:20 christos Exp $ */ /* * 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. 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 8.1 (Berkeley) 6/10/93 */ #ifndef _NETINET_IP_VAR_H_ #define _NETINET_IP_VAR_H_ #include /* * Overlay for ip header used by other protocols (tcp, udp). */ struct ipovly { u_int8_t ih_x1[9]; /* (unused) */ u_int8_t ih_pr; /* protocol */ u_int16_t ih_len; /* protocol length */ struct in_addr ih_src; /* source internet address */ struct in_addr ih_dst; /* destination internet address */ }; /* * Ip (reassembly or sequence) queue structures. * * XXX -- The following explains why the ipqe_m field is here, for TCP's use: * We want to avoid doing m_pullup on incoming packets but that * means avoiding dtom on the tcp reassembly code. That in turn means * keeping an mbuf pointer in the reassembly queue (since we might * have a cluster). As a quick hack, the source & destination * port numbers (which are no longer needed once we've located the * tcpcb) are overlayed with an mbuf pointer. */ LIST_HEAD(ipqehead, ipqent); struct ipqent { LIST_ENTRY(ipqent) ipqe_q; union { struct ip *_ip; struct tcphdr *_tcp; } _ipqe_u1; struct mbuf *ipqe_m; /* mbuf contains packet */ u_int8_t ipqe_mff; /* for IP fragmentation */ }; #define ipqe_ip _ipqe_u1._ip #define ipqe_tcp _ipqe_u1._tcp /* * 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 { LIST_ENTRY(ipq) ipq_q; /* to other reass headers */ u_int8_t ipq_ttl; /* time for reass q to live */ u_int8_t ipq_p; /* protocol of this fragment */ u_int16_t ipq_id; /* sequence id for reassembly */ struct ipqehead ipq_fragq; /* to ip fragment queue */ struct in_addr ipq_src, ipq_dst; }; /* * 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 */ int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */ }; /* * Structure 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_int8_t imo_multicast_ttl; /* TTL for outgoing multicasts */ u_int8_t imo_multicast_loop; /* 1 => hear sends if a member */ u_int16_t imo_num_memberships; /* no. memberships this socket */ struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; }; struct ipstat { u_long ips_total; /* total packets received */ u_long ips_badsum; /* checksum bad */ u_long ips_tooshort; /* packet too short */ u_long ips_toosmall; /* not enough data */ u_long ips_badhlen; /* ip header length < data size */ u_long ips_badlen; /* ip length < ip header length */ u_long ips_fragments; /* fragments received */ u_long ips_fragdropped; /* frags dropped (dups, out of space) */ u_long ips_fragtimeout; /* fragments timed out */ u_long ips_forward; /* packets forwarded */ u_long ips_cantforward; /* packets rcvd for unreachable dest */ u_long ips_redirectsent; /* packets forwarded on same net */ u_long ips_noproto; /* unknown or unsupported protocol */ u_long ips_delivered; /* datagrams delivered to upper level*/ u_long ips_localout; /* total ip packets generated here */ u_long ips_odropped; /* lost packets due to nobufs, etc. */ u_long ips_reassembled; /* total packets reassembled ok */ u_long ips_fragmented; /* datagrams successfully fragmented */ u_long ips_ofragments; /* output fragments created */ u_long ips_cantfrag; /* don't fragment flag was set, etc. */ u_long ips_badoptions; /* error in option processing */ u_long ips_noroute; /* packets discarded due to no route */ u_long ips_badvers; /* ip version != 4 */ u_long ips_rawout; /* total raw ip packets generated */ u_long ips_badfrags; /* malformed fragments (bad length) */ u_long ips_rcvmemdrop; /* frags dropped for lack of memory */ u_long ips_toolong; /* ip length > max ip packet size */ u_long ips_nogif; /* no match gif found */ u_long ips_badaddr; /* invalid address on header */ u_long ips_inhwcsum; /* hardware checksummed on input */ u_long ips_outhwcsum; /* hardware checksummed on output */ }; #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 */ #define IP_JUMBO SO_JUMBO /* try to use the jumbo mtu */ #define IP_MTUDISC 0x0800 /* pmtu discovery, set DF */ #define IP_ROUTETOETHER 0x1000 /* ether addresses given */ extern struct ipstat ipstat; extern LIST_HEAD(ipqhead, ipq) ipq; /* ip reass. queue */ extern int ip_defttl; /* default IP ttl */ extern int ip_mtudisc; /* mtu discovery */ extern u_int ip_mtudisc_timeout; /* seconds to timeout mtu discovery */ extern struct rttimer_queue *ip_mtudisc_timeout_q; extern struct pool ipqent_pool; int ip_ctloutput(int, struct socket *, int, int, struct mbuf **); int ip_dooptions(struct mbuf *); void ip_drain(void); void ip_flush(void); void ip_forward(struct mbuf *, int); int ip_fragment(struct mbuf *, struct ifnet *, u_long); void ip_freef(struct ipq *); void ip_freemoptions(struct ip_moptions *); int ip_getmoptions(int, struct ip_moptions *, struct mbuf **); void ip_init(void); int ip_mforward(struct mbuf *, struct ifnet *); int ip_optcopy(struct ip *, struct ip *); int ip_output(struct mbuf *, ...); int ip_pcbopts(struct mbuf **, struct mbuf *); struct mbuf * ip_reass(struct ipqent *, struct ipq *); struct in_ifaddr * in_iawithaddr(struct in_addr, struct mbuf *); struct in_ifaddr * ip_rtaddr(struct in_addr); u_int16_t ip_randomid(void); int ip_setmoptions(int, struct ip_moptions **, struct mbuf *); void ip_slowtimo(void); struct mbuf * ip_srcroute(void); void ip_stripoptions(struct mbuf *, struct mbuf *); int ip_sysctl(int *, u_int, void *, size_t *, void *, size_t); void ipintr(void); void ipv4_input(struct mbuf *); int rip_ctloutput(int, struct socket *, int, int, struct mbuf **); void rip_init(void); void rip_input(struct mbuf *, ...); int rip_output(struct mbuf *, ...); int rip_usrreq(struct socket *, int, struct mbuf *, struct mbuf *, struct mbuf *); #endif /* _KERNEL */ #endif /* _NETINET_IP_VAR_H_ */