195 lines
7.9 KiB
C
195 lines
7.9 KiB
C
/* $NetBSD: ip_var.h,v 1.24 1998/01/05 10:31:59 thorpej 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. 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 <sys/queue.h>
|
|
|
|
/*
|
|
* 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 tcpiphdr *_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 sucessfully 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 */
|
|
};
|
|
|
|
#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_RETURNMTU 0x4 /* pass back mtu on EMSGSIZE */
|
|
#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
|
|
#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
|
|
|
|
struct ipstat ipstat;
|
|
LIST_HEAD(ipqhead, ipq) ipq; /* ip reass. queue */
|
|
u_int16_t ip_id; /* ip packet ctr, for ids */
|
|
int ip_defttl; /* default IP ttl */
|
|
extern int ip_mtudisc; /* mtu discovery */
|
|
extern int anonportmin; /* minimum ephemeral port */
|
|
extern int anonportmax; /* maximum ephemeral port */
|
|
|
|
struct inpcb;
|
|
|
|
int ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
|
|
int ip_dooptions __P((struct mbuf *));
|
|
void ip_drain __P((void));
|
|
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 *, ...));
|
|
int ip_pcbopts __P((struct mbuf **, struct mbuf *));
|
|
struct mbuf *
|
|
ip_reass __P((struct ipqent *, struct ipq *));
|
|
struct in_ifaddr *
|
|
ip_rtaddr __P((struct in_addr));
|
|
void ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *,
|
|
struct mbuf *));
|
|
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 *, u_int, 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 *, ...));
|
|
int rip_usrreq __P((struct socket *,
|
|
int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *));
|
|
#endif
|