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Annotation of lucent/sys/man/3/iproute, revision 1.1

1.1     ! root        1: .TH IPROUTE 3 
        !             2: .SH NAME
        !             3: iproute \- Internet route table manager
        !             4: .SH SYNOPSIS
        !             5: .B bind -a #P /net
        !             6: .PP
        !             7: .B /net/iproute
        !             8: .br
        !             9: .B /net/ipifc
        !            10: .SH DESCRIPTION
        !            11: The
        !            12: .I iproute
        !            13: device allows the specification of routes for families of IP addresses.
        !            14: It
        !            15: maintains a kernel-resident routing table for IP addresses used by TCP, IL and UDP.
        !            16: Each route consists of a destination IP address, an IP mask, and an IP gateway address.
        !            17: Every packet sent by the system is routed according to the route table.
        !            18: An address matches the route table entry when a packet's destination address
        !            19: matches the table destination address under the mask. When a match is found,
        !            20: the packet is sent to the gateway IP address. If there is no match, the
        !            21: packet is sent with the original destination address.
        !            22: If there are several matches, the one whose mask has the fewest
        !            23: leading zeros is chosen.
        !            24: (Because of the definition of IP
        !            25: masks, this mask preserves the largest portion of the address
        !            26: and is therefore the most specific.)
        !            27: This is
        !            28: forced by storing the routes in decreasing number of ones order
        !            29: and returning the first match.  The default gateway has no ones
        !            30: in the mask and is thus the last matched.
        !            31: .PP
        !            32: Reading
        !            33: .B iproute
        !            34: reports the current routes entered in the table.
        !            35: Writing control
        !            36: messages to
        !            37: .B iproute
        !            38: edits the table.
        !            39: Route entries are made by writing a string of format
        !            40: .IP
        !            41: .EX
        !            42: add \f2ipdest mask ipgateway\fP
        !            43: .EE
        !            44: .PP
        !            45: Entries are deleted by writing a string of format
        !            46: .IP
        !            47: .EX
        !            48: delete \f2ipdest mask\fP
        !            49: .EE
        !            50: .PP
        !            51: The whole table can be cleared by writing the string
        !            52: .LR flush .
        !            53: .PP
        !            54: For example, to install a gateway address to accept all IP packets from a machine:
        !            55: .IP
        !            56: .EX
        !            57: % echo 'add 0.0.0.0 0.0.0.0 131.107.1.5' > /net/iproute
        !            58: % cat /net/iproute
        !            59: 0.0.0.0 & 0.0.0.0 -> 131.107.1.5
        !            60: .EE
        !            61: .PP
        !            62: Reading
        !            63: .B ipifc
        !            64: reports the current IP interfaces being used, one line per interface,
        !            65: showing the device, the maximum transfer unit, the local address, the
        !            66: network mask, and the network address.
        !            67: .PP
        !            68: .SH SOURCE
        !            69: .B /sys/src/9/port/deviproute.c
        !            70: .SH SEE ALSO
        !            71: .IR ip (3),
        !            72: .IR ipconfig (8)

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