Mercurial > dropbear
annotate tcp-accept.c @ 274:8438ff0cdb74
merge of 50848a51c2f9867bc10e81826190dbc326ea16b9
and 84e3597daa468534c4a34231ae8761f841a0f5ae
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Tue, 28 Feb 2006 04:04:27 +0000 |
parents | c049490e43fe |
children | 3cea9d789cca |
rev | line source |
---|---|
74
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
1 /* |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
2 * Dropbear SSH |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
3 * |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
4 * Copyright (c) 2002,2003 Matt Johnston |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
5 * All rights reserved. |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
6 * |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
7 * Permission is hereby granted, free of charge, to any person obtaining a copy |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
8 * of this software and associated documentation files (the "Software"), to deal |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
9 * in the Software without restriction, including without limitation the rights |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
11 * copies of the Software, and to permit persons to whom the Software is |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
12 * furnished to do so, subject to the following conditions: |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
13 * |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
14 * The above copyright notice and this permission notice shall be included in |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
15 * all copies or substantial portions of the Software. |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
16 * |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
23 * SOFTWARE. */ |
e3adf4cf5465
License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents:
65
diff
changeset
|
24 |
62 | 25 #include "includes.h" |
26 #include "ssh.h" | |
64 | 27 #include "tcpfwd.h" |
62 | 28 #include "dbutil.h" |
29 #include "session.h" | |
30 #include "buffer.h" | |
31 #include "packet.h" | |
32 #include "listener.h" | |
33 #include "runopts.h" | |
34 | |
65
02e4a7f614f8
Oops, forgot to call the actual code.
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
|
35 #ifdef DROPBEAR_TCP_ACCEPT |
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
36 |
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
37 static void cleanup_tcp(struct Listener *listener) { |
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
38 |
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
39 struct TCPListener *tcpinfo = (struct TCPListener*)(listener->typedata); |
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
40 |
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
41 m_free(tcpinfo->sendaddr); |
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
42 m_free(tcpinfo->listenaddr); |
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
43 m_free(tcpinfo); |
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
44 } |
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
45 |
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
46 static void tcp_acceptor(struct Listener *listener, int sock) { |
62 | 47 |
48 int fd; | |
49 struct sockaddr_storage addr; | |
50 int len; | |
51 char ipstring[NI_MAXHOST], portstring[NI_MAXSERV]; | |
52 struct TCPListener *tcpinfo = (struct TCPListener*)(listener->typedata); | |
53 | |
54 len = sizeof(addr); | |
55 | |
56 fd = accept(sock, (struct sockaddr*)&addr, &len); | |
57 if (fd < 0) { | |
58 return; | |
59 } | |
60 | |
61 if (getnameinfo((struct sockaddr*)&addr, len, ipstring, sizeof(ipstring), | |
62 portstring, sizeof(portstring), | |
63 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { | |
64 return; | |
65 } | |
66 | |
67 if (send_msg_channel_open_init(fd, tcpinfo->chantype) == DROPBEAR_SUCCESS) { | |
259
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
68 unsigned char* addr = NULL; |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
69 unsigned int port = 0; |
62 | 70 |
259
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
71 if (tcpinfo->tcp_type == direct) { |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
72 /* "direct-tcpip" */ |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
73 /* host to connect, port to connect */ |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
74 addr = tcpinfo->sendaddr; |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
75 port = tcpinfo->sendport; |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
76 } else { |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
77 dropbear_assert(tcpinfo->tcp_type == forwarded); |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
78 /* "forwarded-tcpip" */ |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
79 /* address that was connected, port that was connected */ |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
80 addr = tcpinfo->listenaddr; |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
81 port = tcpinfo->listenport; |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
82 } |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
83 |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
84 buf_putstring(ses.writepayload, addr, strlen(addr)); |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
85 buf_putint(ses.writepayload, port); |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
86 |
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
87 /* originator ip */ |
62 | 88 buf_putstring(ses.writepayload, ipstring, strlen(ipstring)); |
259
c049490e43fe
* fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
89 /* originator port */ |
62 | 90 buf_putint(ses.writepayload, atol(portstring)); |
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
91 |
62 | 92 encrypt_packet(); |
93 | |
94 } else { | |
95 /* XXX debug? */ | |
96 close(fd); | |
97 } | |
98 } | |
99 | |
100 int listen_tcpfwd(struct TCPListener* tcpinfo) { | |
101 | |
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
102 char portstring[NI_MAXSERV]; |
62 | 103 int socks[DROPBEAR_MAX_SOCKS]; |
104 struct Listener *listener = NULL; | |
105 int nsocks; | |
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
106 char* errstring = NULL; |
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
107 // listen_spec = NULL indicates localhost |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
108 const char* listen_spec = NULL; |
62 | 109 |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
74
diff
changeset
|
110 TRACE(("enter listen_tcpfwd")) |
62 | 111 |
112 /* first we try to bind, so don't need to do so much cleanup on failure */ | |
64 | 113 snprintf(portstring, sizeof(portstring), "%d", tcpinfo->listenport); |
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
114 |
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
115 /* a listenaddr of "" will indicate all interfaces */ |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
116 if (opts.listen_fwd_all |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
117 && (strcmp(tcpinfo->listenaddr, "localhost") != 0) ) { |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
118 listen_spec = tcpinfo->listenaddr; |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
119 } |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
120 |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
121 nsocks = dropbear_listen(listen_spec, portstring, socks, |
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
122 DROPBEAR_MAX_SOCKS, &errstring, &ses.maxfd); |
62 | 123 if (nsocks < 0) { |
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
124 dropbear_log(LOG_INFO, "TCP forward failed: %s", errstring); |
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
125 m_free(errstring); |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
74
diff
changeset
|
126 TRACE(("leave listen_tcpfwd: dropbear_listen failed")) |
62 | 127 return DROPBEAR_FAILURE; |
128 } | |
129 | |
130 listener = new_listener(socks, nsocks, CHANNEL_ID_TCPFORWARDED, tcpinfo, | |
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
131 tcp_acceptor, cleanup_tcp); |
62 | 132 |
133 if (listener == NULL) { | |
134 m_free(tcpinfo); | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
74
diff
changeset
|
135 TRACE(("leave listen_tcpfwd: listener failed")) |
62 | 136 return DROPBEAR_FAILURE; |
137 } | |
138 | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
74
diff
changeset
|
139 TRACE(("leave listen_tcpfwd: success")) |
62 | 140 return DROPBEAR_SUCCESS; |
141 } | |
142 | |
65
02e4a7f614f8
Oops, forgot to call the actual code.
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
|
143 #endif /* DROPBEAR_TCP_ACCEPT */ |