Re: [tor-dev] channel_t to IP Address
On Thu, Jul 24, 2014 at 01:55:43PM +0100, Gareth Owen wrote: > Andrea > > Thanks for taking the time to reply and for the advice. I have just this > second discovered this method: > > TO_OR_CIRCUIT(circ)->p_chan->get_remote_descr(TO_OR_CIRCUIT(circ)->p_chan, > 0) > > which returns the endpoint as a string. I wonder, is this safer/future > proof or should this approach be discouraged? Don't call channel methods directly like that. Do call something like channel_get_actual_remote_descr(), channel_get_actual_remote_address(), or channel_get_canonical_remote_descr() (see code in channel.c for differences among them) on TO_OR_CIRCUIT(circ)->p_chan. Note: only do this if you want a string to show the user or something like that. If you're going to parse it, it's very much brittle and not future- proof. -- Andrea Shepard PGP fingerprint (ECC): BDF5 F867 8A52 4E4A BECF DE79 A4FF BC34 F01D D536 PGP fingerprint (RSA): 3611 95A4 0740 ED1B 7EA5 DF7E 4191 13D9 D0CF BDA5 pgp8LTosxltAG.pgp Description: PGP signature ___ tor-dev mailing list tor-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
Re: [tor-dev] channel_t to IP Address
Andrea Thanks for taking the time to reply and for the advice. I have just this second discovered this method: TO_OR_CIRCUIT(circ)->p_chan->get_remote_descr(TO_OR_CIRCUIT(circ)->p_chan, 0) which returns the endpoint as a string. I wonder, is this safer/future proof or should this approach be discouraged? Best Gareth On 24 July 2014 12:20, Gareth Owen wrote: > Hi all > > Quick question, how does one turn channel_t into an IP address, e.g. given > a circuit_t how do I get the IP address of the previous and next hop > (noting that they might not be in the consensus so I cant use the identity > hash). I can see the information is in the connection_t struct but I don't > know how to get that from the channel/circuit. > > Any help appreciated. > > Thanks > Gareth > > -- > Dr Gareth Owen > Senior Lecturer > School of Computing, University of Portsmouth > > Tel: 02392 846423 > Web: ghowen.me > -- Dr Gareth Owen Senior Lecturer School of Computing, University of Portsmouth Tel: 02392 846423 Web: ghowen.me ___ tor-dev mailing list tor-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
Re: [tor-dev] channel_t to IP Address
On Thu, Jul 24, 2014 at 12:20:52PM +0100, Gareth Owen wrote: > Hi all > > Quick question, how does one turn channel_t into an IP address, e.g. given > a circuit_t how do I get the IP address of the previous and next hop > (noting that they might not be in the consensus so I cant use the identity > hash). I can see the information is in the connection_t struct but I don't > know how to get that from the channel/circuit. The IP address (and the fact that the channel_t even is over IP) are specific to particular transport; you'll have to downcast it to a channel_tls_t using the BASE_CHAN_TO_TLS macro and then look at the or_connection_t pointer in that structure. -- Andrea Shepard PGP fingerprint (ECC): BDF5 F867 8A52 4E4A BECF DE79 A4FF BC34 F01D D536 PGP fingerprint (RSA): 3611 95A4 0740 ED1B 7EA5 DF7E 4191 13D9 D0CF BDA5 pgpD4i2EOymVx.pgp Description: PGP signature ___ tor-dev mailing list tor-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
[tor-dev] channel_t to IP Address
Hi all Quick question, how does one turn channel_t into an IP address, e.g. given a circuit_t how do I get the IP address of the previous and next hop (noting that they might not be in the consensus so I cant use the identity hash). I can see the information is in the connection_t struct but I don't know how to get that from the channel/circuit. Any help appreciated. Thanks Gareth -- Dr Gareth Owen Senior Lecturer School of Computing, University of Portsmouth Tel: 02392 846423 Web: ghowen.me ___ tor-dev mailing list tor-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
