annotate svr-tcpfwd.c @ 1821:df8d8ec1801c

added option to disable trivial auth methods (#128) * added option to disable trivial auth methods * rename argument to match with other ssh clients * fixed trivial auth detection for pubkeys
author Manfred Kaiser <37737811+manfred-kaiser@users.noreply.github.com>
date Thu, 19 Aug 2021 17:37:14 +0200
parents 5015c80808c5
children a7cc3332d8ab
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
efb5e0b335cf TCP forwarding works.
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28 #include "tcpfwd.h"
62
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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"
475
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35 #include "auth.h"
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36 #include "netio.h"
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37
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38 #if !DROPBEAR_SVR_REMOTETCPFWD
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39
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
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40 /* This is better than SSH_MSG_UNIMPLEMENTED */
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41 void recv_msg_global_request_remotetcp() {
1788
1fc0012b9c38 Fix handling of replies to global requests (#112)
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42 unsigned int wantreply = 0;
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43
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44 TRACE(("recv_msg_global_request_remotetcp: remote tcp forwarding not compiled in"))
1fc0012b9c38 Fix handling of replies to global requests (#112)
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45
1789
249681d9ecda Use buf_eatstring instead
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46 buf_eatstring(ses.payload);
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47 wantreply = buf_getbool(ses.payload);
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48 if (wantreply) {
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49 send_msg_request_failure();
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50 }
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51 }
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52
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53 /* */
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54 #endif /* !DROPBEAR_SVR_REMOTETCPFWD */
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55
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56 static int svr_cancelremotetcp(void);
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57 static int svr_remotetcpreq(int *allocated_listen_port);
64
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58 static int newtcpdirect(struct Channel * channel);
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59
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60 #if DROPBEAR_SVR_REMOTETCPFWD
62
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61 static const struct ChanType svr_chan_tcpremote = {
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62 1, /* sepfds */
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63 "forwarded-tcpip",
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5daedffd0769 Set tcp priority as follows:
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64 tcp_prio_inithandler,
62
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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 char* reqname = NULL;
62
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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()) {
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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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aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
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88 reqname = buf_getstring(ses.payload, &namelen);
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
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89 wantreply = buf_getbool(ses.payload);
62
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90
267
7ce577234a10 * svr-tcpfwd.c: should be MAX_NAME_LEN not MAXNAMLEN
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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 int allocated_listen_port = 0;
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98 ret = svr_remotetcpreq(&allocated_listen_port);
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99 /* client expects-port-number-to-make-use-of-server-allocated-ports */
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100 if (DROPBEAR_SUCCESS == ret) {
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101 CHECKCLEARTOWRITE();
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102 buf_putbyte(ses.writepayload, SSH_MSG_REQUEST_SUCCESS);
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103 buf_putint(ses.writepayload, allocated_listen_port);
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houseofkodai <karthik@houseofkodai.in>
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104 encrypt_packet();
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105 wantreply = 0; /* avoid out: below sending another reply */
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106 }
62
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107 } else if (strcmp("cancel-tcpip-forward", reqname) == 0) {
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108 ret = svr_cancelremotetcp();
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109 } else {
165
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110 TRACE(("reqname isn't tcpip-forward: '%s'", reqname))
62
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111 }
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112
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113 out:
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114 if (wantreply) {
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115 if (ret == DROPBEAR_SUCCESS) {
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116 send_msg_request_success();
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117 } else {
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118 send_msg_request_failure();
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119 }
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120 }
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121
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122 m_free(reqname);
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123
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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124 TRACE(("leave recv_msg_global_request"))
62
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125 }
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126
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127 static int matchtcp(const void* typedata1, const void* typedata2) {
62
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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
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
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;
1114
db7963049308 Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
140 char * bindaddr = NULL;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
141 unsigned int addrlen;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
142 unsigned int port;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
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
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1114
diff changeset
148 bindaddr = buf_getstring(ses.payload, &addrlen);
1815
5015c80808c5 Use MAX_HOST_LEN for TCP forwarding requests (#121)
ValdikSS <iam@valdikss.org.ru>
parents: 1789
diff changeset
149 if (addrlen > 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
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
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
172 static int svr_remotetcpreq(int *allocated_listen_port) {
62
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;
1114
db7963049308 Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
175 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;
1620
572a7aefa188 FIx remote forward listeners
Matt Johnston <matt@ucc.asn.au>
parents: 1547
diff changeset
179 struct Listener *listener = NULL;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180
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
181 TRACE(("enter remotetcpreq"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
182
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1114
diff changeset
183 request_addr = buf_getstring(ses.payload, &addrlen);
1815
5015c80808c5 Use MAX_HOST_LEN for TCP forwarding requests (#121)
ValdikSS <iam@valdikss.org.ru>
parents: 1789
diff changeset
184 if (addrlen > 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
185 TRACE(("addr len too long: %d", addrlen))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
186 goto out;
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
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
189 port = buf_getint(ses.payload);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
190
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
191 if (port != 0) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
192 if (port < 1 || port > 65535) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
193 TRACE(("invalid port: %d", port))
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
194 goto out;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
195 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
196
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
197 if (!ses.allowprivport && port < IPPORT_RESERVED) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
198 TRACE(("can't assign port < 1024 for non-root"))
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
199 goto out;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
200 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
201 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
202
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203 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
204 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
205 tcpinfo->sendport = 0;
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
206 tcpinfo->listenport = port;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207 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
208 tcpinfo->tcp_type = forwarded;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
210 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
211 if (!opts.listen_fwd_all || (strcmp(request_addr, "localhost") == 0) ) {
1250
2bb4c662d1c2 more hard tab
Francois Perrad <francois.perrad@gadz.org>
parents: 1122
diff changeset
212 /* 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
213 tcpinfo->listenaddr = NULL;
577
69e98c45db7c - Progress for allowing specifying a listenaddr for tcp forwards
Matt Johnston <matt@ucc.asn.au>
parents: 475
diff changeset
214 }
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
215 else
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
216 {
1334
c8114a48837c listenaddr must be malloced
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
217 tcpinfo->listenaddr = m_strdup(request_addr);
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
218 }
577
69e98c45db7c - Progress for allowing specifying a listenaddr for tcp forwards
Matt Johnston <matt@ucc.asn.au>
parents: 475
diff changeset
219
1620
572a7aefa188 FIx remote forward listeners
Matt Johnston <matt@ucc.asn.au>
parents: 1547
diff changeset
220 ret = listen_tcpfwd(tcpinfo, &listener);
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
221 if (DROPBEAR_SUCCESS == ret) {
1620
572a7aefa188 FIx remote forward listeners
Matt Johnston <matt@ucc.asn.au>
parents: 1547
diff changeset
222 tcpinfo->listenport = get_sock_port(listener->socks[0]);
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
223 *allocated_listen_port = tcpinfo->listenport;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
224 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 out:
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 if (ret == DROPBEAR_FAILURE) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
228 /* 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
229 * 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
230 m_free(request_addr);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231 m_free(tcpinfo);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
232 }
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
233
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
234 TRACE(("leave remotetcpreq"))
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
235
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
236 return ret;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
237 }
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
238
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
239 #endif /* DROPBEAR_SVR_REMOTETCPFWD */
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
240
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
241 #if DROPBEAR_SVR_LOCALTCPFWD
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
242
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 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
244 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
245 "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
246 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
247 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
248 NULL, /* reqhandler */
1625
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1620
diff changeset
249 NULL, /* closehandler */
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1620
diff changeset
250 NULL /* cleanup */
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
251 };
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
252
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
253 /* 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
254 * address */
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
255 static int newtcpdirect(struct Channel * channel) {
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
256
1114
db7963049308 Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
257 char* desthost = NULL;
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
258 unsigned int destport;
1114
db7963049308 Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
259 char* orighost = NULL;
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
260 unsigned int origport;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
261 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
262 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
263 int err = SSH_OPEN_ADMINISTRATIVELY_PROHIBITED;
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
264
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
265 TRACE(("newtcpdirect channel %d", channel->index))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
266
475
52a644e7b8e1 * Patch from Frédéric Moulins adding options to authorized_keys.
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
267 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
268 TRACE(("leave newtcpdirect: local tcp forwarding disabled"))
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
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1114
diff changeset
272 desthost = buf_getstring(ses.payload, &len);
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
273 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
274 TRACE(("leave newtcpdirect: desthost too long"))
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
275 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
276 }
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
277
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
278 destport = buf_getint(ses.payload);
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
279
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1114
diff changeset
280 orighost = buf_getstring(ses.payload, &len);
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
281 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
282 TRACE(("leave newtcpdirect: orighost too long"))
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
283 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
284 }
efb5e0b335cf TCP forwarding works.
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parents: 63
diff changeset
285
efb5e0b335cf TCP forwarding works.
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parents: 63
diff changeset
286 origport = buf_getint(ses.payload);
efb5e0b335cf TCP forwarding works.
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parents: 63
diff changeset
287
efb5e0b335cf TCP forwarding works.
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parents: 63
diff changeset
288 /* best be sure */
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parents: 63
diff changeset
289 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
290 TRACE(("leave newtcpdirect: port > 65535"))
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
291 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
292 }
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parents: 63
diff changeset
293
1785
9026f976eee8 fuzz: work around fuzz_connect_remote() limitations
Matt Johnston <matt@ucc.asn.au>
parents: 1627
diff changeset
294 channel->prio = DROPBEAR_CHANNEL_PRIO_UNKNOWABLE;
9026f976eee8 fuzz: work around fuzz_connect_remote() limitations
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parents: 1627
diff changeset
295
1237
888e3d17e962 Fix print format specifier
Chocobo1 <Chocobo1@users.noreply.github.com>
parents: 1122
diff changeset
296 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
297 channel->conn_pending = connect_remote(desthost, portstring, channel_connect_done, channel, NULL, NULL);
64
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parents: 63
diff changeset
298
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 64
diff changeset
299 err = SSH_OPEN_IN_PROGRESS;
64
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parents: 63
diff changeset
300
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parents: 63
diff changeset
301 out:
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Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
302 m_free(desthost);
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parents: 63
diff changeset
303 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
304 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
305 return err;
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
306 }
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
307
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
308 #endif /* DROPBEAR_SVR_LOCALTCPFWD */