replace reference to getkerninfo(2) with reference to sysctl(3),
resync structures and definitions with <net/route.h>; PR 2007 also add SEE ALSO section, and misc. cleanup
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mikel
parent
499dd92e9d
commit
b6b71e4383
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@ -1,4 +1,4 @@
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.\" $NetBSD: route.4,v 1.3 1994/11/30 16:22:31 jtc Exp $
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.\" $NetBSD: route.4,v 1.4 1997/01/16 06:50:16 mikel Exp $
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.\"
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.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -116,7 +116,7 @@ to a specific address family by specifying which one is desired.
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There can be more than one routing socket open per system.
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.Pp
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Messages are formed by a header followed by a small
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number of sockadders (now variable length particularly
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number of sockaddrs (now variable length particularly
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in the
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.Tn ISO
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case), interpreted by position, and delimited
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@ -131,7 +131,7 @@ to most significant bit within the vector.
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.Pp
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Any messages sent to the kernel are returned, and copies are sent
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to all interested listeners. The kernel will provide the process
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id. for the sender, and the sender may use an additional sequence
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ID for the sender, and the sender may use an additional sequence
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field to distinguish between outstanding messages. However,
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message replies may be lost when kernel buffers are exhausted.
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.Pp
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@ -150,7 +150,7 @@ or
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.Dv ENOBUFS
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if insufficient resources were available
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to install a new route.
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In the current implementation, all routing process run locally,
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In the current implementation, all routing processes run locally,
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and the values for
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.Ar rtm_errno
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are available through the normal
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@ -181,9 +181,8 @@ entry to a specific destination by using a
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message,
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or by reading the
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.Pa /dev/kmem
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device, or by issuing a
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.Xr getkerninfo 2
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system call.
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device, or by calling
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.Xr sysctl 3 .
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.Pp
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Messages include:
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.Bd -literal
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@ -191,10 +190,13 @@ Messages include:
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#define RTM_DELETE 0x2 /* Delete Route */
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#define RTM_CHANGE 0x3 /* Change Metrics, Flags, or Gateway */
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#define RTM_GET 0x4 /* Report Information */
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#define RTM_LOOSING 0x5 /* Kernel Suspects Partitioning */
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#define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */
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#define RTM_REDIRECT 0x6 /* Told to use different route */
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#define RTM_MISS 0x7 /* Lookup failed on this address */
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#define RTM_RESOLVE 0xb /* request to resolve dst to LL addr */
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#define RTM_NEWADDR 0xc /* address being added to iface */
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#define RTM_DELADDR 0xd /* address being removed from iface */
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#define RTM_IFINFO 0xe /* iface going up/down etc. */
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.Ed
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.Pp
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A message header consists of:
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@ -204,11 +206,11 @@ struct rt_msghdr {
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u_char rtm_version; /* future binary compatibility */
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u_char rtm_type; /* message type */
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u_short rmt_index; /* index for associated ifp */
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pid_t rmt_pid; /* identify sender */
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int rtm_flags; /* flags, incl kern & message, e.g. DONE */
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int rtm_addrs; /* bitmask identifying sockaddrs in msg */
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pid_t rmt_pid; /* identify sender */
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int rtm_seq; /* for sender to identify action */
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int rtm_errno; /* why failed */
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int rtm_flags; /* flags, incl kern & message, e.g. DONE */
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int rtm_use; /* from rtentry */
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u_long rtm_inits; /* which values we are initializing */
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struct rt_metrics rtm_rmx; /* metrics themselves */
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@ -227,6 +229,7 @@ struct rt_metrics {
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u_long rmx_ssthresh; /* outbound gateway buffer limit */
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u_long rmx_rtt; /* estimated round trip time */
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u_long rmx_rttvar; /* estimated rtt variance */
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u_long rmx_pksent; /* packets sent using this route */
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};
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.Ed
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.Pp
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@ -245,19 +248,20 @@ Flags include the values:
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#define RTF_LLINFO 0x400 /* generated by ARP or ESIS */
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#define RTF_STATIC 0x800 /* manually added */
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#define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */
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#define RTF_PROTO2 0x4000 /* protocol specific routing flag #1 */
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#define RTF_PROTO1 0x8000 /* protocol specific routing flag #2 */
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#define RTF_PROTO2 0x4000 /* protocol specific routing flag */
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#define RTF_PROTO1 0x8000 /* protocol specific routing flag */
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.Ed
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.Pp
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Specifiers for metric values in rmx_locks and rtm_inits are:
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.Bd -literal
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#define RTV_SSTHRESH 0x1 /* init or lock _ssthresh */
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#define RTV_RPIPE 0x2 /* init or lock _recvpipe */
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#define RTV_SPIPE 0x4 /* init or lock _sendpipe */
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#define RTV_HOPCOUNT 0x8 /* init or lock _hopcount */
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#define RTV_RTT 0x10 /* init or lock _rtt */
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#define RTV_RTTVAR 0x20 /* init or lock _rttvar */
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#define RTV_MTU 0x40 /* init or lock _mtu */
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#define RTV_MTU 0x1 /* init or lock _mtu */
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#define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
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#define RTV_EXPIRE 0x4 /* init or lock _expire */
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#define RTV_RPIPE 0x8 /* init or lock _recvpipe */
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#define RTV_SPIPE 0x10 /* init or lock _sendpipe */
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#define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
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#define RTV_RTT 0x40 /* init or lock _rtt */
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#define RTV_RTTVAR 0x80 /* init or lock _rttvar */
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.Ed
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.Pp
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Specifiers for which addresses are present in the messages are:
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@ -269,4 +273,8 @@ Specifiers for which addresses are present in the messages are:
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#define RTA_IFP 0x10 /* interface name sockaddr present */
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#define RTA_IFA 0x20 /* interface addr sockaddr present */
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#define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
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#define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
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.Ed
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.Sh SEE ALSO
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.Xr socket 2 ,
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.Xr sysctl 3
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