annotate svr-tcpfwd.c @ 1479:38c6bcbf4f4a

missed saving a file removing none cipher
author Matt Johnston <matt@ucc.asn.au>
date Fri, 09 Feb 2018 23:58:13 +0800
parents f787f60f8e45
children 2d450c1056e3
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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"
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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"
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36 #include "netio.h"
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37
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38 #ifndef DROPBEAR_SVR_REMOTETCPFWD
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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 /* */
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47 #endif /* !DROPBEAR_SVR_REMOTETCPFWD */
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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
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51 static int newtcpdirect(struct Channel * channel);
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52
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53 #if DROPBEAR_SVR_REMOTETCPFWD
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54 static const struct ChanType svr_chan_tcpremote = {
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55 1, /* sepfds */
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56 "forwarded-tcpip",
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57 tcp_prio_inithandler,
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58 NULL,
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59 NULL,
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60 NULL
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61 };
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62
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63 /* At the moment this is completely used for tcp code (with the name reflecting
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64 * that). If new request types are added, this should be replaced with code
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65 * similar to the request-switching in chansession.c */
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66 void recv_msg_global_request_remotetcp() {
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67
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68 char* reqname = NULL;
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69 unsigned int namelen;
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70 unsigned int wantreply = 0;
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71 int ret = DROPBEAR_FAILURE;
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72
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73 TRACE(("enter recv_msg_global_request_remotetcp"))
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74
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75 if (svr_opts.noremotetcp || !svr_pubkey_allows_tcpfwd()) {
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76 TRACE(("leave recv_msg_global_request_remotetcp: remote tcp forwarding disabled"))
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77 goto out;
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78 }
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79
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80 reqname = buf_getstring(ses.payload, &namelen);
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81 wantreply = buf_getbool(ses.payload);
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82
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83 if (namelen > MAX_NAME_LEN) {
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84 TRACE(("name len is wrong: %d", namelen))
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85 goto out;
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86 }
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87
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88 if (strcmp("tcpip-forward", reqname) == 0) {
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89 int allocated_listen_port;
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90 ret = svr_remotetcpreq(&allocated_listen_port);
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91 /* client expects-port-number-to-make-use-of-server-allocated-ports */
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92 if (DROPBEAR_SUCCESS == ret) {
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93 CHECKCLEARTOWRITE();
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94 buf_putbyte(ses.writepayload, SSH_MSG_REQUEST_SUCCESS);
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95 buf_putint(ses.writepayload, allocated_listen_port);
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96 encrypt_packet();
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97 wantreply = 0; //so out does not do so
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98 }
62
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99 } else if (strcmp("cancel-tcpip-forward", reqname) == 0) {
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100 ret = svr_cancelremotetcp();
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101 } else {
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102 TRACE(("reqname isn't tcpip-forward: '%s'", reqname))
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103 }
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104
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105 out:
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106 if (wantreply) {
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107 if (ret == DROPBEAR_SUCCESS) {
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108 send_msg_request_success();
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109 } else {
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110 send_msg_request_failure();
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111 }
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112 }
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113
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114 m_free(reqname);
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115
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116 TRACE(("leave recv_msg_global_request"))
62
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117 }
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118
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119 static int matchtcp(const void* typedata1, const void* typedata2) {
62
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120
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121 const struct TCPListener *info1 = (struct TCPListener*)typedata1;
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122 const struct TCPListener *info2 = (struct TCPListener*)typedata2;
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123
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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124 return (info1->listenport == info2->listenport)
62
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125 && (info1->chantype == info2->chantype)
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126 && (strcmp(info1->listenaddr, info2->listenaddr) == 0);
62
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127 }
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128
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129 static int svr_cancelremotetcp() {
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130
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131 int ret = DROPBEAR_FAILURE;
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db7963049308 Turn many local variables into char *
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132 char * bindaddr = NULL;
62
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133 unsigned int addrlen;
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134 unsigned int port;
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135 struct Listener * listener = NULL;
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136 struct TCPListener tcpinfo;
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137
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138 TRACE(("enter cancelremotetcp"))
62
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139
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aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
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140 bindaddr = buf_getstring(ses.payload, &addrlen);
62
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parents:
diff changeset
141 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
142 TRACE(("addr len too long: %d", addrlen))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
143 goto out;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
144 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
145
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
146 port = buf_getint(ses.payload);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
147
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
148 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
149 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
150 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
151 tcpinfo.listenport = port;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
152 listener = get_listener(CHANNEL_ID_TCPFORWARDED, &tcpinfo, matchtcp);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
153 if (listener) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
154 remove_listener( listener );
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
155 ret = DROPBEAR_SUCCESS;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
156 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
157
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
158 out:
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
159 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
160 TRACE(("leave cancelremotetcp"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
161 return ret;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
162 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
163
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
164 static int svr_remotetcpreq(int *allocated_listen_port) {
62
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 int ret = DROPBEAR_FAILURE;
1114
db7963049308 Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
167 char * request_addr = NULL;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
168 unsigned int addrlen;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
169 struct TCPListener *tcpinfo = NULL;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
170 unsigned int port;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
171
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
172 TRACE(("enter remotetcpreq"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
173
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1114
diff changeset
174 request_addr = buf_getstring(ses.payload, &addrlen);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
175 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
176 TRACE(("addr len too long: %d", addrlen))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
177 goto out;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
178 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
179
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180 port = buf_getint(ses.payload);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
181
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
182 if (port != 0) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
183 if (port < 1 || port > 65535) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
184 TRACE(("invalid port: %d", port))
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
185 goto out;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
186 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
187
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
188 if (!ses.allowprivport && port < IPPORT_RESERVED) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
189 TRACE(("can't assign port < 1024 for non-root"))
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
190 goto out;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
191 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
192 }
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 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
195 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
196 tcpinfo->sendport = 0;
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
197 tcpinfo->listenport = port;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
198 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
199 tcpinfo->tcp_type = forwarded;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
200
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
201 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
202 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
203 /* 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
204 tcpinfo->listenaddr = NULL;
577
69e98c45db7c - Progress for allowing specifying a listenaddr for tcp forwards
Matt Johnston <matt@ucc.asn.au>
parents: 475
diff changeset
205 }
675
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
206 else
dfdb9d9189ff Server shouldn't return "localhost" in response to -R forward connections
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
207 {
1334
c8114a48837c listenaddr must be malloced
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
208 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
209 }
577
69e98c45db7c - Progress for allowing specifying a listenaddr for tcp forwards
Matt Johnston <matt@ucc.asn.au>
parents: 475
diff changeset
210
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
211 ret = listen_tcpfwd(tcpinfo);
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
212 if (DROPBEAR_SUCCESS == ret) {
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
213 tcpinfo->listenport = get_sock_port(ses.listeners[0]->socks[0]);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
214 *allocated_listen_port = tcpinfo->listenport;
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
215 dropbear_log(LOG_INFO, "tcpip-forward %s:%d '%s'",
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
216 ((NULL == tcpinfo->listenaddr)?"localhost":tcpinfo->listenaddr),
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
217 tcpinfo->listenport, ses.authstate.pw_name);
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
218 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
219
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220 out:
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221 if (ret == DROPBEAR_FAILURE) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 /* 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
223 * 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
224 m_free(request_addr);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 m_free(tcpinfo);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 }
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
227
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
228 TRACE(("leave remotetcpreq"))
1464
ad637c9e0f6f Server chosen tcpfwd ports (#43)
houseofkodai <karthik@houseofkodai.in>
parents: 1460
diff changeset
229
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
230 return ret;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231 }
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
232
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
233 #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
234
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
235 #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
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 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
238 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
239 "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
240 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
241 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
242 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
243 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
244 };
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
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
246 /* 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
247 * address */
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
248 static int newtcpdirect(struct Channel * channel) {
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
249
1114
db7963049308 Turn many local variables into char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
250 char* desthost = NULL;
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
253 unsigned int origport;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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:
Matt Johnston <matt@ucc.asn.au>
parents: 937
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
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
262 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
263 }
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
268 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
269 }
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 destport = buf_getint(ses.payload);
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
276 goto out;
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
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
279 origport = buf_getint(ses.payload);
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
280
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
281 /* best be sure */
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
284 goto out;
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
285 }
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Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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
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parents: 63
diff changeset
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
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parents: 63
diff changeset
293
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parents: 63
diff changeset
294 out:
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Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
295 m_free(desthost);
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Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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
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parents: 63
diff changeset
299 }
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Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
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 */