annotate svr-tcpfwd.c @ 816:84e4259dae3e

Only send a failure response to a channel request if wantreply is set.
author Matt Johnston <matt@ucc.asn.au>
date Sat, 21 Sep 2013 00:34:36 +0800
parents dfdb9d9189ff
children c19acba28590
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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
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26 #include "includes.h"
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27 #include "ssh.h"
64
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28 #include "tcpfwd.h"
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29 #include "dbutil.h"
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30 #include "session.h"
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31 #include "buffer.h"
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32 #include "packet.h"
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33 #include "listener.h"
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34 #include "runopts.h"
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35 #include "auth.h"
62
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36
673
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37 static void send_msg_request_failure();
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38
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39 static void send_msg_request_failure() {
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40 CHECKCLEARTOWRITE();
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41 buf_putbyte(ses.writepayload, SSH_MSG_REQUEST_FAILURE);
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42 encrypt_packet();
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43 }
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44
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45 #ifndef ENABLE_SVR_REMOTETCPFWD
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46
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47 /* This is better than SSH_MSG_UNIMPLEMENTED */
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48 void recv_msg_global_request_remotetcp() {
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49 TRACE(("recv_msg_global_request_remotetcp: remote tcp forwarding not compiled in"))
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50 send_msg_request_failure();
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51 }
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52
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53 /* */
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54 #endif /* !ENABLE_SVR_REMOTETCPFWD */
62
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55
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56 static void send_msg_request_success();
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57 static int svr_cancelremotetcp();
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58 static int svr_remotetcpreq();
64
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59 static int newtcpdirect(struct Channel * channel);
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60
673
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61 #ifdef ENABLE_SVR_REMOTETCPFWD
62
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62 static const struct ChanType svr_chan_tcpremote = {
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63 1, /* sepfds */
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64 "forwarded-tcpip",
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65 NULL,
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66 NULL,
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67 NULL,
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68 NULL
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69 };
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70
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71 /* At the moment this is completely used for tcp code (with the name reflecting
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72 * that). If new request types are added, this should be replaced with code
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73 * similar to the request-switching in chansession.c */
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74 void recv_msg_global_request_remotetcp() {
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75
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76 unsigned char* reqname = NULL;
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77 unsigned int namelen;
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78 unsigned int wantreply = 0;
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79 int ret = DROPBEAR_FAILURE;
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80
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81 TRACE(("enter recv_msg_global_request_remotetcp"))
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82
475
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83 if (svr_opts.noremotetcp || !svr_pubkey_allows_tcpfwd()) {
165
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84 TRACE(("leave recv_msg_global_request_remotetcp: remote tcp forwarding disabled"))
62
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85 goto out;
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86 }
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87
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88 reqname = buf_getstring(ses.payload, &namelen);
179
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89 wantreply = buf_getbool(ses.payload);
62
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90
267
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91 if (namelen > MAX_NAME_LEN) {
165
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92 TRACE(("name len is wrong: %d", namelen))
62
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93 goto out;
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94 }
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95
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96 if (strcmp("tcpip-forward", reqname) == 0) {
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97 ret = svr_remotetcpreq();
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98 } else if (strcmp("cancel-tcpip-forward", reqname) == 0) {
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99 ret = svr_cancelremotetcp();
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100 } else {
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101 TRACE(("reqname isn't tcpip-forward: '%s'", reqname))
62
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102 }
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103
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104 out:
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105 if (wantreply) {
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106 if (ret == DROPBEAR_SUCCESS) {
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107 send_msg_request_success();
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108 } else {
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109 send_msg_request_failure();
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110 }
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111 }
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112
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113 m_free(reqname);
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114
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115 TRACE(("leave recv_msg_global_request"))
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116 }
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117
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118
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119 static void send_msg_request_success() {
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120
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121 CHECKCLEARTOWRITE();
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122 buf_putbyte(ses.writepayload, SSH_MSG_REQUEST_SUCCESS);
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123 encrypt_packet();
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124
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125 }
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126
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127 static int matchtcp(void* typedata1, void* typedata2) {
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128
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129 const struct TCPListener *info1 = (struct TCPListener*)typedata1;
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130 const struct TCPListener *info2 = (struct TCPListener*)typedata2;
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131
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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132 return (info1->listenport == info2->listenport)
62
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133 && (info1->chantype == info2->chantype)
258
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134 && (strcmp(info1->listenaddr, info2->listenaddr) == 0);
62
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135 }
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136
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137 static int svr_cancelremotetcp() {
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138
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139 int ret = DROPBEAR_FAILURE;
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140 unsigned char * bindaddr = NULL;
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141 unsigned int addrlen;
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142 unsigned int port;
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diff changeset
143 struct Listener * listener = NULL;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
144 struct TCPListener tcpinfo;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
145
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
146 TRACE(("enter cancelremotetcp"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
147
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
148 bindaddr = buf_getstring(ses.payload, &addrlen);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
149 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
150 TRACE(("addr len too long: %d", addrlen))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
151 goto out;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
152 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
153
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
154 port = buf_getint(ses.payload);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
155
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
156 tcpinfo.sendaddr = NULL;
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
157 tcpinfo.sendport = 0;
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
158 tcpinfo.listenaddr = bindaddr;
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
159 tcpinfo.listenport = port;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
160 listener = get_listener(CHANNEL_ID_TCPFORWARDED, &tcpinfo, matchtcp);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
161 if (listener) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
162 remove_listener( listener );
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
163 ret = DROPBEAR_SUCCESS;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
164 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
165
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
166 out:
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
167 m_free(bindaddr);
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
168 TRACE(("leave cancelremotetcp"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
169 return ret;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
170 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
171
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
172 static int svr_remotetcpreq() {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
173
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
174 int ret = DROPBEAR_FAILURE;
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
175 unsigned char * request_addr = NULL;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
176 unsigned int addrlen;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
177 struct TCPListener *tcpinfo = NULL;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
178 unsigned int port;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
179
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
180 TRACE(("enter remotetcpreq"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
181
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
182 request_addr = buf_getstring(ses.payload, &addrlen);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
183 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
184 TRACE(("addr len too long: %d", addrlen))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
185 goto out;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
186 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
187
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
188 port = buf_getint(ses.payload);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
189
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
190 if (port == 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
191 dropbear_log(LOG_INFO, "Server chosen tcpfwd ports are unsupported");
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
192 goto out;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
193 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
194
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
195 if (port < 1 || port > 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
196 TRACE(("invalid port: %d", port))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
197 goto out;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
198 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
199
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
200 if (!ses.allowprivport && port < IPPORT_RESERVED) {
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
201 TRACE(("can't assign port < 1024 for non-root"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
202 goto out;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 tcpinfo = (struct TCPListener*)m_malloc(sizeof(struct TCPListener));
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
206 tcpinfo->sendaddr = NULL;
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
207 tcpinfo->sendport = 0;
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
208 tcpinfo->listenport = port;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209 tcpinfo->chantype = &svr_chan_tcpremote;
259
c049490e43fe * fix -L forwarding on the client, broke last rev
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
210 tcpinfo->tcp_type = forwarded;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
211
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
212 tcpinfo->request_listenaddr = request_addr;
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
213 if (!opts.listen_fwd_all || (strcmp(request_addr, "localhost") == 0) ) {
577
69e98c45db7c - Progress for allowing specifying a listenaddr for tcp forwards
Matt Johnston <matt@ucc.asn.au>
parents: 475
diff changeset
214 // NULL means "localhost only"
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
215 tcpinfo->listenaddr = NULL;
577
69e98c45db7c - Progress for allowing specifying a listenaddr for tcp forwards
Matt Johnston <matt@ucc.asn.au>
parents: 475
diff changeset
216 }
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
217 else
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
218 {
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
219 tcpinfo->listenaddr = request_addr;
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
220 }
577
69e98c45db7c - Progress for allowing specifying a listenaddr for tcp forwards
Matt Johnston <matt@ucc.asn.au>
parents: 475
diff changeset
221
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 ret = listen_tcpfwd(tcpinfo);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224 out:
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 if (ret == DROPBEAR_FAILURE) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 /* we only free it if a listener wasn't created, since the listener
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 * has to remember it if it's to be cancelled */
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
228 m_free(request_addr);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
229 m_free(tcpinfo);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
230 }
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
231 TRACE(("leave remotetcpreq"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
232 return ret;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
233 }
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
234
673
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
235 #endif /* ENABLE_SVR_REMOTETCPFWD */
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
236
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
237 #ifdef ENABLE_SVR_LOCALTCPFWD
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
238
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
239 const struct ChanType svr_chan_tcpdirect = {
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
240 1, /* sepfds */
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
241 "direct-tcpip",
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
242 newtcpdirect, /* init */
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
243 NULL, /* checkclose */
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
244 NULL, /* reqhandler */
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
245 NULL /* closehandler */
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
246 };
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
247
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
248 /* Called upon creating a new direct tcp channel (ie we connect out to an
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
249 * address */
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
250 static int newtcpdirect(struct Channel * channel) {
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
251
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
252 unsigned char* desthost = NULL;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
253 unsigned int destport;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
254 unsigned char* orighost = NULL;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
255 unsigned int origport;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
256 char portstring[NI_MAXSERV];
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
257 int sock;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
258 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
259 int err = SSH_OPEN_ADMINISTRATIVELY_PROHIBITED;
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
260
475
52a644e7b8e1 * Patch from Frédéric Moulins adding options to authorized_keys.
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
261 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
262 TRACE(("leave newtcpdirect: local tcp forwarding disabled"))
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
263 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
264 }
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
265
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
266 desthost = buf_getstring(ses.payload, &len);
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
267 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
268 TRACE(("leave newtcpdirect: desthost too long"))
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
269 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
270 }
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
271
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
272 destport = buf_getint(ses.payload);
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
273
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
274 orighost = buf_getstring(ses.payload, &len);
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
275 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
276 TRACE(("leave newtcpdirect: orighost too long"))
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
277 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
278 }
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
279
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
280 origport = buf_getint(ses.payload);
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
281
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
282 /* best be sure */
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
283 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
284 TRACE(("leave newtcpdirect: port > 65535"))
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
285 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
286 }
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
287
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
288 snprintf(portstring, sizeof(portstring), "%d", destport);
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
289 sock = connect_remote(desthost, portstring, 1, NULL);
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
290 if (sock < 0) {
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 64
diff changeset
291 err = SSH_OPEN_CONNECT_FAILED;
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
292 TRACE(("leave newtcpdirect: sock failed"))
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
293 goto out;
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Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
294 }
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parents: 63
diff changeset
295
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parents: 63
diff changeset
296 ses.maxfd = MAX(ses.maxfd, sock);
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parents: 63
diff changeset
297
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
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parents: 179
diff changeset
298 /* We don't set readfd, that will get set after the connection's
64
efb5e0b335cf TCP forwarding works.
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parents: 63
diff changeset
299 * progress succeeds */
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
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parents: 179
diff changeset
300 channel->writefd = sock;
64
efb5e0b335cf TCP forwarding works.
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parents: 63
diff changeset
301 channel->initconn = 1;
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parents: 63
diff changeset
302
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
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parents: 64
diff changeset
303 err = SSH_OPEN_IN_PROGRESS;
64
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parents: 63
diff changeset
304
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parents: 63
diff changeset
305 out:
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parents: 63
diff changeset
306 m_free(desthost);
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parents: 63
diff changeset
307 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
308 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
309 return err;
64
efb5e0b335cf TCP forwarding works.
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parents: 63
diff changeset
310 }
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parents: 63
diff changeset
311
673
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 620
diff changeset
312 #endif /* ENABLE_SVR_LOCALTCPFWD */