Mercurial > dropbear
annotate tcpfwd.h @ 994:5c5ade336926
Prefer stronger algorithms in algorithm negotiation.
Prefer diffie-hellman-group14-sha1 (2048 bit) over
diffie-hellman-group1-sha1 (1024 bit).
Due to meet-in-the-middle attacks the effective key length of
three key 3DES is 112 bits. AES is stronger and faster then 3DES.
Prefer to delay the start of compression until after authentication
has completed. This avoids exposing compression code to attacks
from unauthenticated users.
(github pull request #9)
| author | Fedor Brunner <fedor.brunner@azet.sk> |
|---|---|
| date | Fri, 23 Jan 2015 23:00:25 +0800 |
| parents | f92eb625c48d |
| children | deed0571cacc |
| rev | line source |
|---|---|
| 64 | 1 /* |
| 2 * Dropbear - a SSH2 server | |
| 3 * | |
| 4 * Copyright (c) 2002,2003 Matt Johnston | |
| 5 * All rights reserved. | |
| 6 * | |
| 7 * Permission is hereby granted, free of charge, to any person obtaining a copy | |
| 8 * of this software and associated documentation files (the "Software"), to deal | |
| 9 * in the Software without restriction, including without limitation the rights | |
| 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| 11 * copies of the Software, and to permit persons to whom the Software is | |
| 12 * furnished to do so, subject to the following conditions: | |
| 13 * | |
| 14 * The above copyright notice and this permission notice shall be included in | |
| 15 * all copies or substantial portions of the Software. | |
| 16 * | |
| 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| 23 * SOFTWARE. */ | |
| 24 #ifndef _TCPFWD_H | |
| 25 #define _TCPFWD_H | |
| 26 | |
| 27 #include "channel.h" | |
|
551
c3f2ec71e3d4
New standard linked list to use, rather than adhoc SignKeyList or TCPFwdList
Matt Johnston <matt@ucc.asn.au>
parents:
505
diff
changeset
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28 #include "list.h" |
| 64 | 29 |
| 30 struct TCPListener { | |
| 31 | |
|
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
108
diff
changeset
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32 /* For a direct-tcpip request, it's the addr/port we want the other |
| 64 | 33 * end to connect to */ |
| 34 unsigned char *sendaddr; | |
| 35 unsigned int sendport; | |
| 36 | |
|
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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parents:
108
diff
changeset
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37 /* This is the address/port that we listen on. The address has special |
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306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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parents:
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diff
changeset
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38 * meanings as per the rfc, "" for all interfaces, "localhost" for |
|
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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parents:
108
diff
changeset
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39 * localhost, or a normal interface name. */ |
|
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
108
diff
changeset
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40 unsigned char *listenaddr; |
| 64 | 41 unsigned int listenport; |
|
675
dfdb9d9189ff
Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents:
579
diff
changeset
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42 /* The address that the remote host asked to listen on */ |
|
855
04ede40a529a
- Some fixes for old compilers like tru64 v4 from Daniel Richard G.
Matt Johnston <matt@ucc.asn.au>
parents:
675
diff
changeset
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43 unsigned char *request_listenaddr; |
| 64 | 44 |
| 45 const struct ChanType *chantype; | |
|
259
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
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46 enum {direct, forwarded} tcp_type; |
| 64 | 47 }; |
| 48 | |
|
551
c3f2ec71e3d4
New standard linked list to use, rather than adhoc SignKeyList or TCPFwdList
Matt Johnston <matt@ucc.asn.au>
parents:
505
diff
changeset
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49 /* A forwarding entry */ |
|
c3f2ec71e3d4
New standard linked list to use, rather than adhoc SignKeyList or TCPFwdList
Matt Johnston <matt@ucc.asn.au>
parents:
505
diff
changeset
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50 struct TCPFwdEntry { |
|
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
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51 const unsigned char* connectaddr; |
| 64 | 52 unsigned int connectport; |
|
578
44f486b72427
- tcpfwd bindaddr support against trunk. needs merging.
Matt Johnston <matt@ucc.asn.au>
parents:
551
diff
changeset
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53 const unsigned char* listenaddr; |
| 64 | 54 unsigned int listenport; |
|
505
805e557fdff7
Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents:
475
diff
changeset
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55 unsigned int have_reply; /* is set to 1 after a reply has been received |
|
805e557fdff7
Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents:
475
diff
changeset
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56 when setting up the forwarding */ |
| 64 | 57 }; |
| 58 | |
| 59 /* Server */ | |
| 60 void recv_msg_global_request_remotetcp(); | |
|
475
52a644e7b8e1
* Patch from Frédéric Moulins adding options to authorized_keys.
Matt Johnston <matt@ucc.asn.au>
parents:
259
diff
changeset
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61 |
| 64 | 62 extern const struct ChanType svr_chan_tcpdirect; |
| 63 | |
| 64 /* Client */ | |
| 65 void setup_localtcp(); | |
|
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
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66 void setup_remotetcp(); |
| 64 | 67 extern const struct ChanType cli_chan_tcpremote; |
|
505
805e557fdff7
Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents:
475
diff
changeset
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68 void cli_recv_msg_request_success(); |
|
805e557fdff7
Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents:
475
diff
changeset
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69 void cli_recv_msg_request_failure(); |
| 64 | 70 |
| 71 /* Common */ | |
| 72 int listen_tcpfwd(struct TCPListener* tcpinfo); | |
|
941
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
855
diff
changeset
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73 int tcp_prio_inithandler(struct Channel* chan); |
|
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
855
diff
changeset
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74 |
|
948
f92eb625c48d
- Don't use multichar constants since recent gcc complains
Matt Johnston <matt@ucc.asn.au>
parents:
941
diff
changeset
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75 /* A random identifier */ |
|
f92eb625c48d
- Don't use multichar constants since recent gcc complains
Matt Johnston <matt@ucc.asn.au>
parents:
941
diff
changeset
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76 #define CHANNEL_ID_TCPFORWARDED 0x43612c67 |
| 64 | 77 |
| 78 #endif |