252 lines
9.0 KiB
C
252 lines
9.0 KiB
C
/*-
|
|
* 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.
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _NETINET_IP_VAR_H_
|
|
#define _NETINET_IP_VAR_H_
|
|
|
|
#include <sys/queue.h>
|
|
#ifdef _KERNEL
|
|
#include <sys/vimage.h>
|
|
#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 */
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* 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 */
|
|
struct label *ipq_label; /* MAC label */
|
|
};
|
|
#endif /* _KERNEL */
|
|
|
|
/*
|
|
* 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 */
|
|
};
|
|
|
|
/*
|
|
* Multicast source list entry.
|
|
*/
|
|
struct in_msource {
|
|
TAILQ_ENTRY(in_msource) ims_next; /* next source */
|
|
struct sockaddr_storage ims_addr; /* address of this source */
|
|
};
|
|
|
|
/*
|
|
* Multicast filter descriptor; there is one instance per group membership
|
|
* on a socket, allocated as an expandable vector hung off ip_moptions.
|
|
* struct in_multi contains separate IPv4-stack-wide state for IGMPv3.
|
|
*/
|
|
struct in_mfilter {
|
|
uint16_t imf_fmode; /* filter mode for this socket/group */
|
|
uint16_t imf_nsources; /* # of sources for this socket/group */
|
|
TAILQ_HEAD(, in_msource) imf_sources; /* source list */
|
|
};
|
|
|
|
/*
|
|
* Structure attached to inpcb.ip_moptions and
|
|
* passed to ip_output when IP multicast options are in use.
|
|
* This structure is lazy-allocated.
|
|
*/
|
|
struct ip_moptions {
|
|
struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
|
|
struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
|
|
u_long imo_multicast_vif; /* vif num 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 */
|
|
u_short imo_max_memberships; /* max memberships this socket */
|
|
struct in_multi **imo_membership; /* group memberships */
|
|
struct in_mfilter *imo_mfilters; /* source filters */
|
|
};
|
|
|
|
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_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 */
|
|
};
|
|
|
|
#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_SENDONES 0x4 /* send all-ones broadcast */
|
|
#define IP_SENDTOIF 0x8 /* send on specific ifnet */
|
|
#define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */
|
|
#define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */
|
|
|
|
/*
|
|
* mbuf flag used by ip_fastfwd
|
|
*/
|
|
#define M_FASTFWD_OURS M_PROTO1 /* changed dst to local */
|
|
|
|
#ifdef __NO_STRICT_ALIGNMENT
|
|
#define IP_HDR_ALIGNED_P(ip) 1
|
|
#else
|
|
#define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
|
|
#endif
|
|
|
|
struct ip;
|
|
struct inpcb;
|
|
struct route;
|
|
struct sockopt;
|
|
|
|
extern struct ipstat ipstat;
|
|
extern u_short ip_id; /* ip packet ctr, for ids */
|
|
extern int ip_defttl; /* default IP ttl */
|
|
extern int ipforwarding; /* ip forwarding */
|
|
#ifdef IPSTEALTH
|
|
extern int ipstealth; /* stealth forwarding */
|
|
#endif
|
|
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 inp_freemoptions(struct ip_moptions *);
|
|
int inp_getmoptions(struct inpcb *, struct sockopt *);
|
|
int inp_setmoptions(struct inpcb *, struct sockopt *);
|
|
|
|
int ip_ctloutput(struct socket *, struct sockopt *sopt);
|
|
void ip_drain(void);
|
|
void ip_fini(void *xtp);
|
|
int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
|
|
u_long if_hwassist_flags, int sw_csum);
|
|
void ip_forward(struct mbuf *m, int srcrt);
|
|
void ip_init(void);
|
|
extern int
|
|
(*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
|
|
struct ip_moptions *);
|
|
int ip_output(struct mbuf *,
|
|
struct mbuf *, struct route *, int, struct ip_moptions *,
|
|
struct inpcb *);
|
|
int ipproto_register(u_char);
|
|
int ipproto_unregister(u_char);
|
|
struct mbuf *
|
|
ip_reass(struct mbuf *);
|
|
struct in_ifaddr *
|
|
ip_rtaddr(struct in_addr, u_int fibnum);
|
|
void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
|
|
struct mbuf *);
|
|
void ip_slowtimo(void);
|
|
u_int16_t ip_randomid(void);
|
|
int rip_ctloutput(struct socket *, struct sockopt *);
|
|
void rip_ctlinput(int, struct sockaddr *, void *);
|
|
void rip_init(void);
|
|
void rip_input(struct mbuf *, int);
|
|
int rip_output(struct mbuf *, struct socket *, u_long);
|
|
void ipip_input(struct mbuf *, int);
|
|
void rsvp_input(struct mbuf *, 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 void (*rsvp_input_p)(struct mbuf *m, int off);
|
|
|
|
extern struct pfil_head inet_pfil_hook; /* packet filter hooks */
|
|
|
|
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 (V_ip_do_randomid)
|
|
return ip_randomid();
|
|
|
|
return htons(V_ip_id++);
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_NETINET_IP_VAR_H_ */
|