624 lines
18 KiB
Groff
624 lines
18 KiB
Groff
.TH TCPBRIDGE 1 2010-04-04 "(tcpbridge )" "Programmer's Manual"
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.\" DO NOT EDIT THIS FILE (tcpbridge.1)
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.\"
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.\" It has been AutoGen-ed April 4, 2010 at 05:59:20 PM by AutoGen 5.9.9
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.\" From the definitions tcpbridge_opts.def
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.\" and the template file agman1.tpl
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.\"
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.SH NAME
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tcpbridge \- Bridge network traffic across two interfaces
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.SH SYNOPSIS
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.B tcpbridge
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.\" Mixture of short (flag) options and long options
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.RB [ \-\fIflag\fP " [\fIvalue\fP]]... [" \--\fIopt-name\fP " [[=| ]\fIvalue\fP]]..."
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.PP
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All arguments must be options.
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.PP
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tcpbridge is a tool for selectively briding network traffic across two interfaces
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and optionally modifying the packets in betweeen
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.SH "DESCRIPTION"
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This manual page briefly documents the \fBtcpbridge\fP command.
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The basic operation of tcpbridge is to be a network bridge between two
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subnets. All packets received on one interface are sent via the other.
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Optionally, packets can be edited in a variety of ways according to your needs.
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For more details, please see the Tcpreplay Manual at:
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http://tcpreplay.synfin.net/trac/wiki/manual
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.SH OPTIONS
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.SS ""
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.TP
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.BR \-r " \fIstring\fP, " \--portmap "=" \fIstring\fP
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Rewrite TCP/UDP ports.
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This option may appear up to \-1 times.
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.sp
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Specify a list of comma delimited port mappingings consisting of
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colon delimited port number pairs. Each colon delimited port pair
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consists of the port to match followed by the port number to rewrite.
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Examples:
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.nf
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\--portmap=80:8000 \--portmap=8080:80 # 80->8000 and 8080->80
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\--portmap=8000,8080,88888:80 # 3 different ports become 80
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\--portmap=8000-8999:80 # ports 8000 to 8999 become 80
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.fi
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.TP
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.BR \-s " \fInumber\fP, " \--seed "=" \fInumber\fP
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Randomize src/dst IPv4/v6 addresses w/ given seed.
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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.sp
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Causes the source and destination IPv4/v6 addresses to be pseudo
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randomized but still maintain client/server relationships.
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Since the randomization is deterministic based on the seed,
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you can reuse the same seed value to recreate the traffic.
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.TP
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.BR \-N " \fIstring\fP, " \--pnat "=" \fIstring\fP
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Rewrite IPv4/v6 addresses using pseudo-NAT.
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This option may appear up to 2 times.
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This option must not appear in combination with any of the following options:
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srcipmap.
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.sp
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Takes a comma delimited series of colon delimited CIDR
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netblock pairs. Each netblock pair is evaluated in order against
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the IP addresses. If the IP address in the packet matches the
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first netblock, it is rewriten using the second netblock as a
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mask against the high order bits.
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IPv4 Example:
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.nf
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\--pnat=192.168.0.0/16:10.77.0.0/16,172.16.0.0/12:10.1.0.0/24
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.fi
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IPv6 Example:
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.nf
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\--pnat=[2001:db8::/32]:[dead::/16],[2001:db8::/32]:[::ffff:0:0/96]
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.fi
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.TP
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.BR \-S " \fIstring\fP, " \--srcipmap "=" \fIstring\fP
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Rewrite source IPv4/v6 addresses using pseudo-NAT.
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This option may appear up to 1 times.
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This option must not appear in combination with any of the following options:
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pnat.
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.sp
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Works just like the \--pnat option, but only affects the source IP
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addresses in the IPv4/v6 header.
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.TP
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.BR \-D " \fIstring\fP, " \--dstipmap "=" \fIstring\fP
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Rewrite destination IPv4/v6 addresses using pseudo-NAT.
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This option may appear up to 1 times.
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This option must not appear in combination with any of the following options:
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pnat.
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.sp
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Works just like the \--pnat option, but only affects the destination IP
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addresses in the IPv4/v6 header.
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.TP
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.BR \-e " \fIstring\fP, " \--endpoints "=" \fIstring\fP
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Rewrite IP addresses to be between two endpoints.
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This option may appear up to 1 times.
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This option must appear in combination with the following options:
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cachefile.
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.sp
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Takes a pair of colon delimited IPv4/v6 addresses which will be used to rewrite
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all traffic to appear to be between the two IP's.
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IPv4 Example:
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.nf
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\--endpoints=172.16.0.1:172.16.0.2
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.fi
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IPv6 Example:
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.nf
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\--endpoints=[2001:db8::dead:beef]:[::ffff:0:0:ac:f:0:2]
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.fi
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.TP
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.BR \-b ", " \--skipbroadcast
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Skip rewriting broadcast/multicast IPv4/v6 addresses.
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.sp
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By default \--seed, \--pnat and \--endpoints will rewrite
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broadcast and multicast IPv4/v6 and MAC addresses. Setting this flag
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will keep broadcast/multicast IPv4/v6 and MAC addresses from being rewritten.
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.TP
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.BR \-C ", " \--fixcsum
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Force recalculation of IPv4/TCP/UDP header checksums.
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.sp
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Causes each IPv4/v6 packet to have it's checksums recalcualted and
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fixed. Automatically enabled for packets modified with \fB--seed\fP,
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\fB--pnat\fP, \fB--endpoints\fP or \fB--fixlen\fP.
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.TP
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.BR \-m " \fInumber\fP, " \--mtu "=" \fInumber\fP
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Override default MTU length (1500 bytes).
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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The value of \fInumber\fP is constrained to being:
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.in +4
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.nf
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.na
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in the range 1 through MAXPACKET
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.fi
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.in -4
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.sp
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Override the default 1500 byte MTU size for determining the maximum padding length
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(--fixlen=pad) or when truncating (--mtu-trunc).
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.TP
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.BR \--mtu-trunc
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Truncate packets larger then specified MTU.
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This option may appear up to 1 times.
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.sp
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Similar to \--fixlen, this option will truncate data in packets from Layer 3 and above to be
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no larger then the MTU.
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.TP
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.BR \-E ", " \--efcs
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Remove Ethernet checksums (FCS) from end of frames.
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.sp
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Note, this option is pretty dangerous! We don't actually check to see if a FCS
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actually exists in the frame, we just blindly delete the last two bytes. Hence,
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you should only use this if you know know that your OS provides the FCS when
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reading raw packets.
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.TP
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.BR \--ttl "=\fIstring\fP"
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Modify the IPv4/v6 TTL/Hop Limit.
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.sp
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Allows you to modify the TTL/Hop Limit of all the IPv4/v6 packets. Specify a number to hard-code
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the value or +/-value to increase or decrease by the value provided (limited to 1-255).
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Examples:
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.nf
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\--ttl=10
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\--ttl=+7
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\--ttl=-64
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.fi
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.TP
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.BR \--tos "=\fInumber\fP"
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Set the IPv4 TOS/DiffServ/ECN byte.
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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The value of \fInumber\fP is constrained to being:
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.in +4
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.nf
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.na
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in the range 0 through 255
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.fi
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.in -4
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.sp
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Allows you to override the TOS (also known as DiffServ/ECN) value in IPv4.
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.TP
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.BR \--tclass "=\fInumber\fP"
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Set the IPv6 Traffic Class byte.
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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The value of \fInumber\fP is constrained to being:
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.in +4
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.nf
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.na
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in the range 0 through 255
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.fi
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.in -4
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.sp
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Allows you to override the IPv6 Traffic Class field.
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.TP
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.BR \--flowlabel "=\fInumber\fP"
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Set the IPv6 Flow Label.
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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The value of \fInumber\fP is constrained to being:
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.in +4
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.nf
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.na
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in the range 0 through 1048575
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.fi
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.in -4
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.sp
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Allows you to override the 20bit IPv6 Flow Label field. Has no effect on IPv4
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packets.
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.TP
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.BR \-F " \fIstring\fP, " \--fixlen "=" \fIstring\fP
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Pad or truncate packet data to match header length.
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This option may appear up to 1 times.
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.sp
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Packets may be truncated during capture if the snaplen is smaller then the
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packet. This option allows you to modify the packet to pad the packet back
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out to the size stored in the IPv4/v6 header or rewrite the IP header total length
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to reflect the stored packet length.
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.sp 1
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\fBpad\fP
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Truncated packets will be padded out so that the packet length matches the
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IPv4 total length
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.sp 1
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\fBtrunc\fP
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Truncated packets will have their IPv4 total length field rewritten to match
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the actual packet length
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.sp 1
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\fBdel\fP
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Delete the packet
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.TP
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.BR \--skipl2broadcast
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Skip rewriting broadcast/multicast Layer 2 addresses.
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.sp
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By default, editing Layer 2 addresses will rewrite
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broadcast and multicast MAC addresses. Setting this flag
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will keep broadcast/multicast MAC addresses from being rewritten.
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.TP
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.BR \--dlt "=\fIstring\fP"
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Override output DLT encapsulation.
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This option may appear up to 1 times.
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.sp
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By default, no DLT (data link type) conversion will be made.
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To change the DLT type of the output pcap, select one of the following values:
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.sp 1
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\fBenet\fP
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Ethernet aka DLT_EN10MB
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.sp 1
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\fBhdlc\fP
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Cisco HDLC aka DLT_C_HDLC
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.sp 1
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\fBuser\fP
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User specified Layer 2 header and DLT type
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.br
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.TP
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.BR \--enet-dmac "=\fIstring\fP"
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Override destination ethernet MAC addresses.
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This option may appear up to 1 times.
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.sp
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Takes a pair of comma deliminated ethernet MAC addresses which
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will replace the destination MAC address of outbound packets.
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The first MAC address will be used for the server to client traffic
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and the optional second MAC address will be used for the client
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to server traffic.
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Example:
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.nf
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\--enet-dmac=00:12:13:14:15:16,00:22:33:44:55:66
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.fi
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.TP
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.BR \--enet-smac "=\fIstring\fP"
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Override source ethernet MAC addresses.
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This option may appear up to 1 times.
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.sp
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Takes a pair of comma deliminated ethernet MAC addresses which
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will replace the source MAC address of outbound packets.
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The first MAC address will be used for the server to client traffic
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and the optional second MAC address will be used for the client
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to server traffic.
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Example:
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.nf
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\--enet-smac=00:12:13:14:15:16,00:22:33:44:55:66
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.fi
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.TP
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.BR \--enet-vlan "=\fIstring\fP"
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Specify ethernet 802.1q VLAN tag mode.
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This option may appear up to 1 times.
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.sp
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Allows you to rewrite ethernet frames to add a 802.1q header to standard 802.3
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ethernet headers or remove the 802.1q VLAN tag information.
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.sp 1
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\fBadd\fP
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Rewrites the existing 802.3 ethernet header as an 802.1q VLAN header
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.sp 1
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\fBdel\fP
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Rewrites the existing 802.1q VLAN header as an 802.3 ethernet header
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.TP
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.BR \--enet-vlan-tag "=\fInumber\fP"
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Specify the new ethernet 802.1q VLAN tag value.
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This option may appear up to 1 times.
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This option must appear in combination with the following options:
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enet-vlan.
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This option takes an integer number as its argument.
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The value of \fInumber\fP is constrained to being:
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.in +4
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.nf
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.na
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in the range 0 through 4095
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.fi
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.in -4
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.sp
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.TP
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.BR \--enet-vlan-cfi "=\fInumber\fP"
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Specify the ethernet 802.1q VLAN CFI value.
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This option may appear up to 1 times.
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This option must appear in combination with the following options:
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enet-vlan.
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This option takes an integer number as its argument.
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The value of \fInumber\fP is constrained to being:
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.in +4
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.nf
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.na
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in the range 0 through 1
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.fi
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.in -4
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.sp
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.TP
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.BR \--enet-vlan-pri "=\fInumber\fP"
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Specify the ethernet 802.1q VLAN priority.
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This option may appear up to 1 times.
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This option must appear in combination with the following options:
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enet-vlan.
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This option takes an integer number as its argument.
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The value of \fInumber\fP is constrained to being:
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.in +4
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.nf
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.na
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in the range 0 through 7
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.fi
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.in -4
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.sp
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.TP
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.BR \--hdlc-control "=\fInumber\fP"
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Specify HDLC control value.
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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.sp
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The Cisco HDLC header has a 1 byte "control" field. Apparently this should
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always be 0, but if you can use any 1 byte value.
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.TP
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.BR \--hdlc-address "=\fInumber\fP"
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Specify HDLC address.
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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.sp
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The Cisco HDLC header has a 1 byte "address" field which has two valid
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values:
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.sp 1
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\fB0x0F\fP
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Unicast
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.sp 1
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\fB0xBF\fP
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Broadcast
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.br
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You can however specify any single byte value.
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.TP
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.BR \--user-dlt "=\fInumber\fP"
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Set output file DLT type.
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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.sp
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Set the DLT value of the output pcap file.
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.TP
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.BR \--user-dlink "=\fIstring\fP"
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Rewrite Data-Link layer with user specified data.
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This option may appear up to 2 times.
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.sp
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Provide a series of comma deliminated hex values which will be
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used to rewrite or create the Layer 2 header of the packets.
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The first instance of this argument will rewrite both server
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and client traffic, but if this argument is specified a second
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time, it will be used for the client traffic.
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Example:
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.nf
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\--user-dlink=01,02,03,04,05,06,00,1A,2B,3C,4D,5E,6F,08,00
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.fi
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.TP
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.BR \-d " \fInumber\fP, " \--dbug "=" \fInumber\fP
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Enable debugging output.
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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The value of \fInumber\fP is constrained to being:
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.in +4
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.nf
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.na
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in the range 0 through 5
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.fi
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.in -4
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The default \fInumber\fP for this option is:
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.ti +4
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0
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.sp
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If configured with \--enable-debug, then you can specify a verbosity
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level for debugging output. Higher numbers increase verbosity.
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.TP
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.BR \-i " \fIstring\fP, " \--intf1 "=" \fIstring\fP
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Primary interface (listen in uni-directional mode).
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This option may appear up to 1 times.
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.sp
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.TP
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.BR \-I " \fIstring\fP, " \--intf2 "=" \fIstring\fP
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Secondary interface (send in uni-directional mode).
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This option may appear up to 1 times.
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.sp
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.TP
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.BR \-u ", " \--unidir
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Send and receive in only one direction.
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This option may appear up to 1 times.
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.sp
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Normally, tcpbridge will send and receive traffic in both directions
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(bi-directionally). However, if you choose this option, traffic will
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be sent uni-directionally.
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.TP
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.BR \--listnics
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List available network interfaces and exit.
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.sp
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.TP
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.BR \-L " \fInumber\fP, " \--limit "=" \fInumber\fP
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Limit the number of packets to send.
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This option may appear up to 1 times.
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This option takes an integer number as its argument.
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The value of \fInumber\fP is constrained to being:
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.in +4
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.nf
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.na
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greater than or equal to 1
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.fi
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.in -4
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The default \fInumber\fP for this option is:
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.ti +4
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\-1
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.sp
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By default, tcpbridge will send packets forever or until Ctrl-C. Alternatively,
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you can specify a maximum number of packets to send.
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.TP
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.BR \-M " \fIstring\fP, " \--mac "=" \fIstring\fP
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MAC addresses of local NIC's.
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This option may appear up to 2 times.
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.sp
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tcpbridge does not support detecting the MAC addresses of the local network
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interfaces under Windows. Please specify both MAC addresses of the interfaces
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used in the bridge: \-M <intf1 mac> \-M <intf2 mac>
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.TP
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.BR \-x " \fIstring\fP, " \--include "=" \fIstring\fP
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Include only packets matching rule.
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This option may appear up to 1 times.
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This option must not appear in combination with any of the following options:
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exclude.
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.sp
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Override default of sending all packets stored in the capture file and only
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send packets which match the provided rule. Rules can be one of:
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.sp
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.IR "S:<CIDR1>,..."
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- Source IP must match specified CIDR(s)
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.sp
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.IR "D:<CIDR1>,..."
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- Destination IP must match specified CIDR(s)
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.sp
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.IR "B:<CIDR1>,..."
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- Both source and destination IP must match specified CIDR(s)
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.sp
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.IR "E:<CIDR1>,..."
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- Either IP must match specified CIDR(s)
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.sp
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.IR "P:<LIST>"
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- Must be one of the listed packets where the list
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corresponds to the packet number in the capture file.
|
|
.nf
|
|
\--include=P:1-5,9,15,72-
|
|
.fi
|
|
would send packets 1 thru 5, the 9th and 15th packet, and packets 72 until the
|
|
end of the file
|
|
.sp
|
|
.IR "F:'<bpf>'"
|
|
- BPF filter. See the \fItcpdump(8)\fP man page for syntax.
|
|
.br
|
|
.TP
|
|
.BR \-X " \fIstring\fP, " \--exclude "=" \fIstring\fP
|
|
Exclude any packet matching this rule.
|
|
This option may appear up to 1 times.
|
|
This option must not appear in combination with any of the following options:
|
|
include.
|
|
.sp
|
|
Override default of sending all packets stored in the capture file and only
|
|
send packets which do not match the provided rule. Rules can be one of:
|
|
|
|
.sp
|
|
.IR "S:<CIDR1>,..."
|
|
- Source IP must not match specified CIDR(s)
|
|
.sp
|
|
.IR "D:<CIDR1>,..."
|
|
- Destination IP must not match specified CIDR(s)
|
|
.sp
|
|
.IR "B:<CIDR1>,..."
|
|
- Both source and destination IP must not match specified CIDR(s)
|
|
.sp
|
|
.IR "E:<CIDR1>,..."
|
|
- Either IP must not match specified CIDR(s)
|
|
.sp
|
|
.IR "P:<LIST>"
|
|
- Must not be one of the listed packets where the list
|
|
corresponds to the packet number in the capture file.
|
|
.nf
|
|
\--exclude=P:1-5,9,15,72-
|
|
.fi
|
|
would drop packets 1 thru 5, the 9th and 15th packet, and packets 72 until the
|
|
end of the file
|
|
.br
|
|
.TP
|
|
.BR \-P ", " \--pid
|
|
Print the PID of tcpbridge at startup.
|
|
.sp
|
|
|
|
.TP
|
|
.BR \-v ", " \--verbose
|
|
Print decoded packets via tcpdump to STDOUT.
|
|
This option may appear up to 1 times.
|
|
.sp
|
|
|
|
.TP
|
|
.BR \-A " \fIstring\fP, " \--decode "=" \fIstring\fP
|
|
Arguments passed to tcpdump decoder.
|
|
This option may appear up to 1 times.
|
|
This option must appear in combination with the following options:
|
|
verbose.
|
|
.sp
|
|
When enabling verbose mode (\fB-v\fP) you may also specify one or more
|
|
additional arguments to pass to \fBtcpdump\fP to modify the way packets
|
|
are decoded. By default, \-n and \-l are used. Be sure to
|
|
quote the arguments like: \--verbose="-axxx" so that they are not interpreted
|
|
by tcpbridge. The following arguments are vaild:
|
|
[ \-aAeNqRStuvxX ]
|
|
[ \-E spi@ipaddr algo:secret,... ]
|
|
[ \-s snaplen ]
|
|
.TP
|
|
.BR \-V ", " \--version
|
|
Print version information.
|
|
.sp
|
|
|
|
.TP
|
|
.BR \-h ", " \--less-help
|
|
Display less usage information and exit.
|
|
.sp
|
|
|
|
.TP
|
|
.BR \-H , " \--help"
|
|
Display usage information and exit.
|
|
.TP
|
|
.BR \-! , " \--more-help"
|
|
Extended usage information passed thru pager.
|
|
.TP
|
|
.BR \- " [\fIrcfile\fP]," " \--save-opts" "[=\fIrcfile\fP]"
|
|
Save the option state to \fIrcfile\fP. The default is the \fIlast\fP
|
|
configuration file listed in the \fBOPTION PRESETS\fP section, below.
|
|
.TP
|
|
.BR \- " \fIrcfile\fP," " \--load-opts" "=\fIrcfile\fP," " \--no-load-opts"
|
|
Load options from \fIrcfile\fP.
|
|
The \fIno-load-opts\fP form will disable the loading
|
|
of earlier RC/INI files. \fI--no-load-opts\fP is handled early,
|
|
out of order.
|
|
.SH OPTION PRESETS
|
|
Any option that is not marked as \fInot presettable\fP may be preset
|
|
by loading values from configuration ("RC" or ".INI") file(s).
|
|
The \fIhomerc\fP file is "\fI$$/\fP", unless that is a directory.
|
|
In that case, the file "\fI.tcpbridgerc\fP"
|
|
is searched for within that directory.
|
|
.SH "SIGNALS"
|
|
tcpbridge understands the following signals:
|
|
.sp
|
|
.IR "\fBSIGUSR1\fP"
|
|
Suspend tcpbridge
|
|
.sp
|
|
.IR "\fBSIGCONT\fP"
|
|
Restart tcpbridge
|
|
.br
|
|
|
|
.SH "SEE ALSO"
|
|
tcpdump(1), tcpprep(1), tcprewrite(1), tcpreplay(1)
|
|
|
|
.SH "BUGS"
|
|
tcpbridge can only send packets as fast as your computer's interface,
|
|
processor and system bus will allow.
|
|
|
|
Connecting both interfaces to the same subnet may create a broadcast storm and
|
|
take down the network. Improper use of the packet editing functions may have
|
|
other undefined and possible negative consequences.
|
|
|
|
Some operating systems by default do not allow for forging source MAC
|
|
addresses. Please consult your operating system's documentation and the
|
|
tcpreplay FAQ if you experiance this issue.
|
|
.SH AUTHOR
|
|
Copyright 2000-2010 Aaron Turner
|
|
|
|
For support please use the tcpreplay-users@lists.sourceforge.net mailing list.
|
|
|
|
The latest version of this software is always available from:
|
|
http://tcpreplay.synfin.net/
|
|
.PP
|
|
Released under the Free BSD License.
|
|
.PP
|
|
This manual page was \fIAutoGen\fP-erated from the \fBtcpbridge\fP
|
|
option definitions.
|