* Copyright (c) 1980, 1986, 1993
* The Regents of the University of California. All rights reserved.
* %sccs.include.redist.c%
* @(#)route.h 8.5.1.1 (Berkeley) %G%
* Kernel resident routing tables.
* The routing tables are initialized when interface addresses
* are set by making entries for all directly connected interfaces.
* A route consists of a destination address and a reference
* to a routing entry. These are often held by protocols
* in their control blocks, e.g. inpcb.
* These numbers are used by reliable protocols for determining
* retransmission behavior and are included in the routing structure.
u_long rmx_locks
; /* Kernel must leave these values alone */
u_long rmx_mtu
; /* MTU for this path */
u_long rmx_hopcount
; /* max hops expected */
u_long rmx_expire
; /* lifetime for route, e.g. redirect */
u_long rmx_recvpipe
; /* inbound delay-bandwith product */
u_long rmx_sendpipe
; /* outbound delay-bandwith product */
u_long rmx_ssthresh
; /* outbound gateway buffer limit */
u_long rmx_rtt
; /* estimated round trip time */
u_long rmx_rttvar
; /* estimated rtt variance */
u_long rmx_pksent
; /* packets sent using this route */
* rmx_rtt and rmx_rttvar are stored as microseconds;
* RTTTOPRHZ(rtt) converts to a value suitable for use
* by a protocol slowtimo counter.
#define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
#define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ))
* We distinguish between routes to hosts and routes to networks,
* preferring the former if available. For each route we infer
* the interface to use from the gateway address supplied when
* the route was entered. Routes that forward packets through
* gateways are marked so that the output routines know to address the
* gateway rather than the ultimate destination.
struct radix_node rt_nodes
[2]; /* tree glue, and other values */
#define rt_key(r) ((struct sockaddr *)((r)->rt_nodes->rn_key))
#define rt_mask(r) ((struct sockaddr *)((r)->rt_nodes->rn_mask))
struct sockaddr
*rt_gateway
; /* value */
short rt_flags
; /* up/down?, host/net */
short rt_refcnt
; /* # held references */
u_long rt_use
; /* raw # packets forwarded */
struct ifnet
*rt_ifp
; /* the answer: interface to use */
struct ifaddr
*rt_ifa
; /* the answer: interface to use */
struct sockaddr
*rt_genmask
; /* for generation of cloned routes */
caddr_t rt_llinfo
; /* pointer to link level info cache */
struct rt_metrics rt_rmx
; /* metrics used by rx'ing protocols */
struct rtentry
*rt_gwroute
; /* implied entry for gatewayed routes */
* Following structure necessary for 4.3 compatibility;
* We should eventually move it to a compat file.
u_long rt_hash
; /* to speed lookups */
struct sockaddr rt_dst
; /* key */
struct sockaddr rt_gateway
; /* value */
short rt_flags
; /* up/down?, host/net */
short rt_refcnt
; /* # held references */
u_long rt_use
; /* raw # packets forwarded */
struct ifnet
*rt_ifp
; /* the answer: interface to use */
#define RTF_UP 0x1 /* route usable */
#define RTF_GATEWAY 0x2 /* destination is a gateway */
#define RTF_HOST 0x4 /* host entry (net otherwise) */
#define RTF_REJECT 0x8 /* host or net unreachable */
#define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
#define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */
#define RTF_DONE 0x40 /* message confirmed */
#define RTF_MASK 0x80 /* subnet mask present */
#define RTF_CLONING 0x100 /* generate new routes on use */
#define RTF_XRESOLVE 0x200 /* external daemon resolves name */
#define RTF_LLINFO 0x400 /* generated by ARP or ESIS */
#define RTF_STATIC 0x800 /* manually added */
#define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */
#define RTF_MULTICAST 0x2000 /* try joining uni/multicast routing */
#define RTF_PROTO2 0x4000 /* protocol specific routing flag */
#define RTF_PROTO1 0x8000 /* protocol specific routing flag */
short rts_badredirect
; /* bogus redirect calls */
short rts_dynamic
; /* routes created by redirects */
short rts_newgateway
; /* routes modified by redirects */
short rts_unreach
; /* lookups which failed */
short rts_wildcard
; /* lookups satisfied by a wildcard */
* Structures for routing messages.
u_short rtm_msglen
; /* to skip over non-understood messages */
u_char rtm_version
; /* future binary compatibility */
u_char rtm_type
; /* message type */
u_short rtm_index
; /* index for associated ifp */
int rtm_flags
; /* flags, incl. kern & message, e.g. DONE */
int rtm_addrs
; /* bitmask identifying sockaddrs in msg */
pid_t rtm_pid
; /* identify sender */
int rtm_seq
; /* for sender to identify action */
int rtm_errno
; /* why failed */
int rtm_use
; /* from rtentry */
u_long rtm_inits
; /* which metrics we are initializing */
struct rt_metrics rtm_rmx
; /* metrics themselves */
#define RTM_VERSION 3 /* Up the ante and ignore older versions */
#define RTM_ADD 0x1 /* Add Route */
#define RTM_DELETE 0x2 /* Delete Route */
#define RTM_CHANGE 0x3 /* Change Metrics or flags */
#define RTM_GET 0x4 /* Report Metrics */
#define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */
#define RTM_REDIRECT 0x6 /* Told to use different route */
#define RTM_MISS 0x7 /* Lookup failed on this address */
#define RTM_LOCK 0x8 /* fix specified metrics */
#define RTM_OLDADD 0x9 /* caused by SIOCADDRT */
#define RTM_OLDDEL 0xa /* caused by SIOCDELRT */
#define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */
#define RTM_NEWADDR 0xc /* address being added to iface */
#define RTM_DELADDR 0xd /* address being removed from iface */
#define RTM_IFINFO 0xe /* iface going up/down etc. */
#define RTM_ADDPKT 0xf /* Add Route based on entire packet hdr */
#define RTM_DELPKT 0x10 /* Delete Route base on entire packet hdr */
#define RTM_ADDPKT 0xf /* Add Route based on entire packet hdr */
#define RTM_DELPKT 0x10 /* Delete Route base on entire packet hdr */
#define RTV_MTU 0x1 /* init or lock _mtu */
#define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
#define RTV_EXPIRE 0x4 /* init or lock _hopcount */
#define RTV_RPIPE 0x8 /* init or lock _recvpipe */
#define RTV_SPIPE 0x10 /* init or lock _sendpipe */
#define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
#define RTV_RTT 0x40 /* init or lock _rtt */
#define RTV_RTTVAR 0x80 /* init or lock _rttvar */
* Bitmask values for rtm_addr.
#define RTA_DST 0x1 /* destination sockaddr present */
#define RTA_GATEWAY 0x2 /* gateway sockaddr present */
#define RTA_NETMASK 0x4 /* netmask sockaddr present */
#define RTA_GENMASK 0x8 /* cloning mask sockaddr present */
#define RTA_IFP 0x10 /* interface name sockaddr present */
#define RTA_IFA 0x20 /* interface addr sockaddr present */
#define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
#define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
* Index offsets for sockaddr array for alternate internal encoding.
#define RTAX_DST 0 /* destination sockaddr present */
#define RTAX_GATEWAY 1 /* gateway sockaddr present */
#define RTAX_NETMASK 2 /* netmask sockaddr present */
#define RTAX_GENMASK 3 /* cloning mask sockaddr present */
#define RTAX_IFP 4 /* interface name sockaddr present */
#define RTAX_IFA 5 /* interface addr sockaddr present */
#define RTAX_AUTHOR 6 /* sockaddr for author of redirect */
#define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */
#define RTAX_MAX 8 /* size of array to allocate */
struct sockaddr
*rti_info
[RTAX_MAX
];
struct rt_msghdr
*rti_rtm
;
struct rt_msghdr
*rti_rtm
;
if ((rt)->rt_refcnt <= 1) \
struct route_cb route_cb
;
struct radix_node_head
*rt_tables
[AF_MAX
+1];
void route_init
__P((void));
int route_output
__P((struct mbuf
*, struct socket
*));
int route_usrreq
__P((struct socket
*,
int, struct mbuf
*, struct mbuf
*, struct mbuf
*));
void rt_ifmsg
__P((struct ifnet
*));
void rt_maskedcopy
__P((struct sockaddr
*,
struct sockaddr
*, struct sockaddr
*));
void rt_missmsg
__P((int, struct rt_addrinfo
*, int, int));
void rt_newaddrmsg
__P((int, struct ifaddr
*, int, struct rtentry
*));
int rt_setgate
__P((struct rtentry
*,
struct sockaddr
*, struct sockaddr
*));
void rt_setmetrics
__P((u_long
, struct rt_metrics
*, struct rt_metrics
*));
void rtable_init
__P((void **));
void rtalloc
__P((struct route
*));
rtalloc1
__P((struct sockaddr
*, int));
void rtfree
__P((struct rtentry
*));
int rtinit
__P((struct ifaddr
*, int, int));
int rtioctl
__P((u_long
, caddr_t
, struct proc
*));
int rtredirect
__P((struct sockaddr
*, struct sockaddr
*,
struct sockaddr
*, int, struct sockaddr
*, struct rtentry
**));
int rtrequest
__P((int, struct sockaddr
*,
struct sockaddr
*, struct sockaddr
*, int, struct rtentry
**));
int rtrequest1
__P((int, struct rt_addrinfo
*, struct rtentry
**));