Mercurial > dropbear
annotate svr-tcpfwd.c @ 1655:f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
* make key-generation compliant to FIPS 186.4
* fix includes in tommath_class.h
* update fuzzcorpus instead of error-out
* fixup fuzzing make-targets
* update Makefile.in
* apply necessary patches to ltm sources
* clean-up not required ltm files
* update to vanilla ltm 1.1.0
this already only contains the required files
* remove set/get double
author | Steffen Jaeckel <s_jaeckel@gmx.de> |
---|---|
date | Mon, 16 Sep 2019 15:50:38 +0200 |
parents | 9b02c49bd396 |
children | 9026f976eee8 |
rev | line source |
---|---|
74
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1 /* |
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2 * Dropbear SSH |
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3 * |
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4 * Copyright (c) 2002,2003 Matt Johnston |
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5 * Copyright (c) 2004 by Mihnea Stoenescu |
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6 * All rights reserved. |
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7 * |
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8 * Permission is hereby granted, free of charge, to any person obtaining a copy |
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9 * of this software and associated documentation files (the "Software"), to deal |
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10 * in the Software without restriction, including without limitation the rights |
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11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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12 * copies of the Software, and to permit persons to whom the Software is |
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13 * furnished to do so, subject to the following conditions: |
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14 * |
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15 * The above copyright notice and this permission notice shall be included in |
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16 * all copies or substantial portions of the Software. |
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17 * |
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18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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24 * SOFTWARE. */ |
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25 |
62 | 26 #include "includes.h" |
27 #include "ssh.h" | |
64 | 28 #include "tcpfwd.h" |
62 | 29 #include "dbutil.h" |
30 #include "session.h" | |
31 #include "buffer.h" | |
32 #include "packet.h" | |
33 #include "listener.h" | |
34 #include "runopts.h" | |
475
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* Patch from Frédéric Moulins adding options to authorized_keys.
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35 #include "auth.h" |
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36 #include "netio.h" |
62 | 37 |
1499
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38 #if !DROPBEAR_SVR_REMOTETCPFWD |
673
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39 |
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40 /* This is better than SSH_MSG_UNIMPLEMENTED */ |
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41 void recv_msg_global_request_remotetcp() { |
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42 TRACE(("recv_msg_global_request_remotetcp: remote tcp forwarding not compiled in")) |
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43 send_msg_request_failure(); |
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44 } |
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45 |
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46 /* */ |
1295
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47 #endif /* !DROPBEAR_SVR_REMOTETCPFWD */ |
62 | 48 |
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49 static int svr_cancelremotetcp(void); |
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50 static int svr_remotetcpreq(int *allocated_listen_port); |
64 | 51 static int newtcpdirect(struct Channel * channel); |
62 | 52 |
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53 #if DROPBEAR_SVR_REMOTETCPFWD |
62 | 54 static const struct ChanType svr_chan_tcpremote = { |
55 1, /* sepfds */ | |
56 "forwarded-tcpip", | |
941
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Set tcp priority as follows:
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57 tcp_prio_inithandler, |
62 | 58 NULL, |
59 NULL, | |
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60 NULL, |
62 | 61 NULL |
62 }; | |
63 | |
64 /* At the moment this is completely used for tcp code (with the name reflecting | |
65 * that). If new request types are added, this should be replaced with code | |
66 * similar to the request-switching in chansession.c */ | |
67 void recv_msg_global_request_remotetcp() { | |
68 | |
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69 char* reqname = NULL; |
62 | 70 unsigned int namelen; |
71 unsigned int wantreply = 0; | |
72 int ret = DROPBEAR_FAILURE; | |
73 | |
165
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74 TRACE(("enter recv_msg_global_request_remotetcp")) |
62 | 75 |
475
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76 if (svr_opts.noremotetcp || !svr_pubkey_allows_tcpfwd()) { |
165
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77 TRACE(("leave recv_msg_global_request_remotetcp: remote tcp forwarding disabled")) |
62 | 78 goto out; |
79 } | |
80 | |
1122
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81 reqname = buf_getstring(ses.payload, &namelen); |
179
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82 wantreply = buf_getbool(ses.payload); |
62 | 83 |
267
7ce577234a10
* svr-tcpfwd.c: should be MAX_NAME_LEN not MAXNAMLEN
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84 if (namelen > MAX_NAME_LEN) { |
165
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85 TRACE(("name len is wrong: %d", namelen)) |
62 | 86 goto out; |
87 } | |
88 | |
89 if (strcmp("tcpip-forward", reqname) == 0) { | |
1547 | 90 int allocated_listen_port = 0; |
1464
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91 ret = svr_remotetcpreq(&allocated_listen_port); |
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92 /* client expects-port-number-to-make-use-of-server-allocated-ports */ |
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93 if (DROPBEAR_SUCCESS == ret) { |
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94 CHECKCLEARTOWRITE(); |
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95 buf_putbyte(ses.writepayload, SSH_MSG_REQUEST_SUCCESS); |
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96 buf_putint(ses.writepayload, allocated_listen_port); |
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97 encrypt_packet(); |
1541
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don't log server listen ports
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1502
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98 wantreply = 0; /* avoid out: below sending another reply */ |
1502
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fix indentation
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99 } |
62 | 100 } else if (strcmp("cancel-tcpip-forward", reqname) == 0) { |
101 ret = svr_cancelremotetcp(); | |
102 } else { | |
165
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103 TRACE(("reqname isn't tcpip-forward: '%s'", reqname)) |
62 | 104 } |
105 | |
106 out: | |
107 if (wantreply) { | |
108 if (ret == DROPBEAR_SUCCESS) { | |
109 send_msg_request_success(); | |
110 } else { | |
111 send_msg_request_failure(); | |
112 } | |
113 } | |
114 | |
115 m_free(reqname); | |
116 | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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117 TRACE(("leave recv_msg_global_request")) |
62 | 118 } |
119 | |
1460
58a74cb829b8
Pointer parameter could be declared as pointing to const (callback)
Francois Perrad <francois.perrad@gadz.org>
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1342
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120 static int matchtcp(const void* typedata1, const void* typedata2) { |
62 | 121 |
122 const struct TCPListener *info1 = (struct TCPListener*)typedata1; | |
123 const struct TCPListener *info2 = (struct TCPListener*)typedata2; | |
124 | |
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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125 return (info1->listenport == info2->listenport) |
62 | 126 && (info1->chantype == info2->chantype) |
258
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* add -g (dbclient) and -a (dropbear) options for allowing non-local
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127 && (strcmp(info1->listenaddr, info2->listenaddr) == 0); |
62 | 128 } |
129 | |
130 static int svr_cancelremotetcp() { | |
131 | |
132 int ret = DROPBEAR_FAILURE; | |
1114
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Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
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133 char * bindaddr = NULL; |
62 | 134 unsigned int addrlen; |
135 unsigned int port; | |
136 struct Listener * listener = NULL; | |
137 struct TCPListener tcpinfo; | |
138 | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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156
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139 TRACE(("enter cancelremotetcp")) |
62 | 140 |
1122
aaf576b27a10
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parents:
1114
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changeset
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141 bindaddr = buf_getstring(ses.payload, &addrlen); |
62 | 142 if (addrlen > MAX_IP_LEN) { |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
156
diff
changeset
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143 TRACE(("addr len too long: %d", addrlen)) |
62 | 144 goto out; |
145 } | |
146 | |
147 port = buf_getint(ses.payload); | |
148 | |
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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149 tcpinfo.sendaddr = NULL; |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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253
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150 tcpinfo.sendport = 0; |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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151 tcpinfo.listenaddr = bindaddr; |
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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152 tcpinfo.listenport = port; |
62 | 153 listener = get_listener(CHANNEL_ID_TCPFORWARDED, &tcpinfo, matchtcp); |
154 if (listener) { | |
155 remove_listener( listener ); | |
156 ret = DROPBEAR_SUCCESS; | |
157 } | |
158 | |
159 out: | |
160 m_free(bindaddr); | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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156
diff
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161 TRACE(("leave cancelremotetcp")) |
62 | 162 return ret; |
163 } | |
164 | |
1464
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents:
1460
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165 static int svr_remotetcpreq(int *allocated_listen_port) { |
62 | 166 |
167 int ret = DROPBEAR_FAILURE; | |
1114
db7963049308
Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents:
1094
diff
changeset
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168 char * request_addr = NULL; |
62 | 169 unsigned int addrlen; |
170 struct TCPListener *tcpinfo = NULL; | |
171 unsigned int port; | |
1620
572a7aefa188
FIx remote forward listeners
Matt Johnston <matt@ucc.asn.au>
parents:
1547
diff
changeset
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172 struct Listener *listener = NULL; |
62 | 173 |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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156
diff
changeset
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174 TRACE(("enter remotetcpreq")) |
62 | 175 |
1122
aaf576b27a10
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parents:
1114
diff
changeset
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176 request_addr = buf_getstring(ses.payload, &addrlen); |
62 | 177 if (addrlen > MAX_IP_LEN) { |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
156
diff
changeset
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178 TRACE(("addr len too long: %d", addrlen)) |
62 | 179 goto out; |
180 } | |
181 | |
182 port = buf_getint(ses.payload); | |
183 | |
1464
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
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parents:
1460
diff
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184 if (port != 0) { |
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
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1460
diff
changeset
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185 if (port < 1 || port > 65535) { |
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
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parents:
1460
diff
changeset
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186 TRACE(("invalid port: %d", port)) |
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents:
1460
diff
changeset
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187 goto out; |
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
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parents:
1460
diff
changeset
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188 } |
62 | 189 |
1464
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
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parents:
1460
diff
changeset
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190 if (!ses.allowprivport && port < IPPORT_RESERVED) { |
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents:
1460
diff
changeset
|
191 TRACE(("can't assign port < 1024 for non-root")) |
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents:
1460
diff
changeset
|
192 goto out; |
ad637c9e0f6f
Server chosen tcpfwd ports (#43)
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193 } |
62 | 194 } |
195 | |
196 tcpinfo = (struct TCPListener*)m_malloc(sizeof(struct TCPListener)); | |
258
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* add -g (dbclient) and -a (dropbear) options for allowing non-local
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197 tcpinfo->sendaddr = NULL; |
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198 tcpinfo->sendport = 0; |
64 | 199 tcpinfo->listenport = port; |
62 | 200 tcpinfo->chantype = &svr_chan_tcpremote; |
259
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201 tcpinfo->tcp_type = forwarded; |
62 | 202 |
675
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Server shouldn't return "localhost" in response to -R forward connections
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203 tcpinfo->request_listenaddr = request_addr; |
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204 if (!opts.listen_fwd_all || (strcmp(request_addr, "localhost") == 0) ) { |
1250 | 205 /* NULL means "localhost only" */ |
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206 tcpinfo->listenaddr = NULL; |
577
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207 } |
675
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208 else |
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209 { |
1334
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210 tcpinfo->listenaddr = m_strdup(request_addr); |
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211 } |
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212 |
1620
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FIx remote forward listeners
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213 ret = listen_tcpfwd(tcpinfo, &listener); |
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214 if (DROPBEAR_SUCCESS == ret) { |
1620
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215 tcpinfo->listenport = get_sock_port(listener->socks[0]); |
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216 *allocated_listen_port = tcpinfo->listenport; |
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217 } |
62 | 218 |
219 out: | |
220 if (ret == DROPBEAR_FAILURE) { | |
221 /* we only free it if a listener wasn't created, since the listener | |
222 * has to remember it if it's to be cancelled */ | |
675
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223 m_free(request_addr); |
62 | 224 m_free(tcpinfo); |
225 } | |
1464
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226 |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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227 TRACE(("leave remotetcpreq")) |
1464
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228 |
62 | 229 return ret; |
230 } | |
64 | 231 |
1295
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Convert #ifdef to #if, other build changes
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232 #endif /* DROPBEAR_SVR_REMOTETCPFWD */ |
673
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
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233 |
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234 #if DROPBEAR_SVR_LOCALTCPFWD |
673
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
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diff
changeset
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235 |
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
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diff
changeset
|
236 const struct ChanType svr_chan_tcpdirect = { |
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
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parents:
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diff
changeset
|
237 1, /* sepfds */ |
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
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parents:
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diff
changeset
|
238 "direct-tcpip", |
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
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diff
changeset
|
239 newtcpdirect, /* init */ |
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
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240 NULL, /* checkclose */ |
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
241 NULL, /* reqhandler */ |
1625
79eef94ccea9
Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents:
1620
diff
changeset
|
242 NULL, /* closehandler */ |
79eef94ccea9
Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
243 NULL /* cleanup */ |
673
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
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parents:
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diff
changeset
|
244 }; |
c519b78b6d1a
- Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
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parents:
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diff
changeset
|
245 |
64 | 246 /* Called upon creating a new direct tcp channel (ie we connect out to an |
247 * address */ | |
248 static int newtcpdirect(struct Channel * channel) { | |
249 | |
1114
db7963049308
Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents:
1094
diff
changeset
|
250 char* desthost = NULL; |
64 | 251 unsigned int destport; |
1114
db7963049308
Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents:
1094
diff
changeset
|
252 char* orighost = NULL; |
64 | 253 unsigned int origport; |
254 char portstring[NI_MAXSERV]; | |
1094
c45d65392c1a
Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents:
1032
diff
changeset
|
255 unsigned int len; |
70
b0316ce64e4b
Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
|
256 int err = SSH_OPEN_ADMINISTRATIVELY_PROHIBITED; |
64 | 257 |
941
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
937
diff
changeset
|
258 TRACE(("newtcpdirect channel %d", channel->index)) |
5daedffd0769
Set tcp priority as follows:
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parents:
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diff
changeset
|
259 |
475
52a644e7b8e1
* Patch from Frédéric Moulins adding options to authorized_keys.
Matt Johnston <matt@ucc.asn.au>
parents:
410
diff
changeset
|
260 if (svr_opts.nolocaltcp || !svr_pubkey_allows_tcpfwd()) { |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
156
diff
changeset
|
261 TRACE(("leave newtcpdirect: local tcp forwarding disabled")) |
64 | 262 goto out; |
263 } | |
264 | |
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents:
1114
diff
changeset
|
265 desthost = buf_getstring(ses.payload, &len); |
64 | 266 if (len > MAX_HOST_LEN) { |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
156
diff
changeset
|
267 TRACE(("leave newtcpdirect: desthost too long")) |
64 | 268 goto out; |
269 } | |
270 | |
271 destport = buf_getint(ses.payload); | |
272 | |
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents:
1114
diff
changeset
|
273 orighost = buf_getstring(ses.payload, &len); |
64 | 274 if (len > MAX_HOST_LEN) { |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
156
diff
changeset
|
275 TRACE(("leave newtcpdirect: orighost too long")) |
64 | 276 goto out; |
277 } | |
278 | |
279 origport = buf_getint(ses.payload); | |
280 | |
281 /* best be sure */ | |
282 if (origport > 65535 || destport > 65535) { | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
156
diff
changeset
|
283 TRACE(("leave newtcpdirect: port > 65535")) |
64 | 284 goto out; |
285 } | |
286 | |
1237
888e3d17e962
Fix print format specifier
Chocobo1 <Chocobo1@users.noreply.github.com>
parents:
1122
diff
changeset
|
287 snprintf(portstring, sizeof(portstring), "%u", destport); |
1466
f787f60f8e45
bind to port as well with -b
Matt Johnston <matt@ucc.asn.au>
parents:
1465
diff
changeset
|
288 channel->conn_pending = connect_remote(desthost, portstring, channel_connect_done, channel, NULL, NULL); |
941
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
937
diff
changeset
|
289 |
5daedffd0769
Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents:
937
diff
changeset
|
290 channel->prio = DROPBEAR_CHANNEL_PRIO_UNKNOWABLE; |
64 | 291 |
70
b0316ce64e4b
Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
|
292 err = SSH_OPEN_IN_PROGRESS; |
64 | 293 |
294 out: | |
295 m_free(desthost); | |
296 m_free(orighost); | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
156
diff
changeset
|
297 TRACE(("leave newtcpdirect: err %d", err)) |
70
b0316ce64e4b
Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
|
298 return err; |
64 | 299 } |
300 | |
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1276
diff
changeset
|
301 #endif /* DROPBEAR_SVR_LOCALTCPFWD */ |