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Expose TOR_PT_OUTBOUND_BIND_ADDRESS_{V4,V6} to Pluggable Transports.

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This patch adds support for exposing the environment variables
`TOR_PT_OUTBOUND_BIND_ADDRESS_V4` and `TOR_PT_OUTBOUND_BIND_ADDRESS_V6` to
Pluggable Transport proccesses. These two values will contain the IPv4
and IPv6 address that the user have specified in torrc that they wish
the PT to use for all outgoing IP packets.

It is important to note here that it is up to the indvidual Pluggable
Transport if they are willing to honor these values or ignore them
completely.

One can test this feature using the following dummy PT written in POSIX
shell script:

    #!/bin/sh

    echo "LOG SEVERITY=warning MESSAGE=\"Value for IPv4: ${TOR_PT_OUTBOUND_BIND_ADDRESS_V4}\""
    echo "LOG SEVERITY=warning MESSAGE=\"Value for IPv6: ${TOR_PT_OUTBOUND_BIND_ADDRESS_V6}\""

    while true ; do
        sleep 1
    done

with the following entries in your torrc:

    OutboundBindAddressPT 203.0.113.4
    OutboundBindAddress 203.0.113.5
    OutboundBindAddressPT 2001:db8::4
    OutboundBindAddress 2001:db8::5

See: https://bugs.torproject.org/5304
This commit is contained in:
Alexander Færøy
2019-07-02 20:21:13 +02:00
committed by David Goulet
parent 69c1a4ebc3
commit 5f61e19d8a
4 changed files with 83 additions and 1 deletions
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scripts/maint/practracker/exceptions.txt
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@@ -189,7 +189,7 @@ problem function-size /src/feature/client/entrynodes.c:entry_guard_parse_from_st
problem file-size /src/feature/client/entrynodes.h 700
problem function-size /src/feature/client/transports.c:handle_proxy_line() 108
problem function-size /src/feature/client/transports.c:parse_method_line_helper() 110
problem function-size /src/feature/client/transports.c:create_managed_proxy_environment() 111
problem function-size /src/feature/client/transports.c:create_managed_proxy_environment() 140
problem function-size /src/feature/control/control.c:connection_control_process_inbuf() 113
problem function-size /src/feature/control/control_auth.c:handle_control_authenticate() 186
problem function-size /src/feature/control/control_cmd.c:handle_control_extendcircuit() 150