/* * 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 8.2 (Berkeley) 1/9/95 * $FreeBSD: src/sys/netinet/ip_var.h,v 1.50.2.13 2003/08/24 08:24:38 hsu Exp $ */ #ifndef _NETINET_IP_VAR_H_ #define _NETINET_IP_VAR_H_ #ifndef _SYS_TYPES_H_ #include <sys/types.h> #endif #ifndef _SYS_QUEUE_H_ #include <sys/queue.h> #endif #ifndef _NETINET_IN_H_ #include <netinet/in.h> #endif #ifdef _KERNEL #include <machine/endian.h> #ifndef _MACHINE_PARAM_H_ #include <machine/param.h> #endif #ifndef _NET_ROUTE_H #include <net/route.h> #endif #endif /* * Overlay for ip header used by other protocols (tcp, udp). */ struct ipovly { u_char ih_x1[9]; /* (unused) */ u_char ih_pr; /* protocol */ u_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 { TAILQ_ENTRY(ipq) ipq_list; /* 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 mbuf *ipq_frags; /* to ip headers of fragments */ struct in_addr ipq_src,ipq_dst; u_char ipq_nfrags; /* # frags in this packet */ }; /* * 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 */ }; /* * 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 */ struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 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 */ u_short imo_max_memberships; /* max memberships this socket */ struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; u_long imo_multicast_vif; /* vif num outgoing multicasts */ }; /* * IP Statistics. * * NOTE: Make sure this struct's size is multiple cache line size. */ struct ip_stats { 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_fastforward; /* packets fast 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_toolong; /* ip length > max ip packet size */ u_long ips_notmember; /* multicasts for unregistered grps */ u_long ips_nogif; /* no match gif found */ u_long ips_badaddr; /* invalid address on header */ u_long ips_pad[3]; /* pad to cache line size (64B) */ }; #ifdef _KERNEL CTASSERT((sizeof(struct ip_stats) & __VM_CACHELINE_MASK) == 0); #endif #ifdef _KERNEL #define ipstat ipstats_percpu[mycpuid] extern struct ip_stats ipstats_percpu[MAXCPU]; /* 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_DEBUGROUTE 0x10000 /* debug route */ struct ip; struct inpcb; struct route; struct sockopt; struct lwkt_port; struct pktinfo; union netmsg; extern u_short ip_id; /* ip packet ctr, for ids */ extern int ip_defttl; /* default IP ttl */ extern int ipforwarding; /* ip forwarding */ extern int ip_porthash_trycount; extern u_char ip_protox[]; extern struct socket *ip_rsvpd; /* reservation protocol daemon */ extern struct socket *ip_mrouter; /* multicast routing daemon */ extern int (*legal_vif_num)(int); extern u_long (*ip_mcast_src)(int); extern int rsvp_on; extern struct pr_usrreqs rip_usrreqs; void ip_ctloutput(union netmsg *); void ip_drain(void); int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, u_long if_hwassist_flags, int sw_csum); struct mbuf * ip_reass(struct mbuf *); void ip_freemoptions(struct ip_moptions *); void ip_init(void); extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, struct ip_moptions *); void ip_hashfn(struct mbuf **, int); void ip_hashcheck(struct mbuf *, const struct pktinfo *); struct mbuf * ip_rehashm(struct mbuf *); void ip_transport_redispatch(struct lwkt_port *, struct mbuf *, int); boolean_t ip_lengthcheck(struct mbuf **, int); int ip_output(struct mbuf *, struct mbuf *, struct route *, int, struct ip_moptions *, struct inpcb *); struct in_ifaddr * ip_rtaddr(struct in_addr, struct route *); void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, struct mbuf *); struct mbuf * ip_srcroute(struct mbuf *); void ip_stripoptions(struct mbuf *); u_int16_t ip_randomid(void); void rip_ctloutput(union netmsg *); void rip_init(void); int rip_input(struct mbuf **, int *, int); int rip_output(struct mbuf *, struct socket *, ...); extern int (*ipip_input)(struct mbuf **, int *, int); int rsvp_input(struct mbuf **, int *, int); int ip_rsvp_init(struct socket *); int ip_rsvp_done(void); extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); extern void (*ip_rsvp_force_done)(struct socket *); extern int (*rsvp_input_p)(struct mbuf **, int *, int); extern struct pfil_head inet_pfil_hook; void in_delayed_cksum(struct mbuf *m); static __inline uint16_t ip_newid(void); extern int ip_do_randomid; static __inline uint16_t ip_newid(void) { if (ip_do_randomid) return ip_randomid(); else return __htons(ip_id++); } #endif /* _KERNEL */ #endif /* !_NETINET_IP_VAR_H_ */
