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annotate svr-x11fwd.c @ 1231:78b12b6549be DROPBEAR_2016.72

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debian changelog
author Matt Johnston <matt@ucc.asn.au>
date Wed, 09 Mar 2016 22:54:51 +0800
parents a3e8389e01ff
children 428d83f2e5db
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10
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 #include "includes.h"
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26
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27 #ifndef DISABLE_X11FWD
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28 #include "x11fwd.h"
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29 #include "session.h"
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30 #include "ssh.h"
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31 #include "dbutil.h"
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32 #include "chansession.h"
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33 #include "channel.h"
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34 #include "packet.h"
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35 #include "buffer.h"
475
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36 #include "auth.h"
10
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37
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38 #define X11BASEPORT 6000
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39 #define X11BINDBASE 6010
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40
62
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41 static void x11accept(struct Listener* listener, int sock);
10
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42 static int bindport(int fd);
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43 static int send_msg_channel_open_x11(int fd, struct sockaddr_in* addr);
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44
1229
a3e8389e01ff Validate xauth input
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45 /* Check untrusted xauth strings for metacharacters */
a3e8389e01ff Validate xauth input
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46 /* Returns DROPBEAR_SUCCESS/DROPBEAR_FAILURE */
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47 static int
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48 xauth_valid_string(const char *s)
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49 {
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50 size_t i;
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51
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52 for (i = 0; s[i] != '\0'; i++) {
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53 if (!isalnum(s[i]) &&
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54 s[i] != '.' && s[i] != ':' && s[i] != '/' &&
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55 s[i] != '-' && s[i] != '_') {
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56 return DROPBEAR_FAILURE;
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57 }
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58 }
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59 return DROPBEAR_SUCCESS;
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60 }
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61
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62
10
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63 /* called as a request for a session channel, sets up listening X11 */
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64 /* returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
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65 int x11req(struct ChanSess * chansess) {
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66
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67 int fd = -1;
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68
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69 if (!svr_pubkey_allows_x11fwd()) {
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70 return DROPBEAR_FAILURE;
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71 }
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72
10
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73 /* we already have an x11 connection */
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74 if (chansess->x11listener != NULL) {
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75 return DROPBEAR_FAILURE;
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76 }
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77
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
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78 chansess->x11singleconn = buf_getbool(ses.payload);
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
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79 chansess->x11authprot = buf_getstring(ses.payload, NULL);
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
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80 chansess->x11authcookie = buf_getstring(ses.payload, NULL);
10
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81 chansess->x11screennum = buf_getint(ses.payload);
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82
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83 if (xauth_valid_string(chansess->x11authprot) == DROPBEAR_FAILURE ||
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84 xauth_valid_string(chansess->x11authcookie) == DROPBEAR_FAILURE) {
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85 dropbear_log(LOG_WARNING, "Bad xauth request");
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86 goto fail;
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87 }
10
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88 /* create listening socket */
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89 fd = socket(PF_INET, SOCK_STREAM, 0);
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90 if (fd < 0) {
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91 goto fail;
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92 }
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93
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94 /* allocate port and bind */
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95 chansess->x11port = bindport(fd);
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96 if (chansess->x11port < 0) {
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97 goto fail;
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98 }
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99
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100 /* listen */
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101 if (listen(fd, 20) < 0) {
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102 goto fail;
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103 }
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104
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105 /* set non-blocking */
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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parents: 95
diff changeset
106 setnonblocking(fd);
10
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107
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108 /* listener code will handle the socket now.
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109 * No cleanup handler needed, since listener_remove only happens
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110 * from our cleanup anyway */
62
20563735e8b5 just checkpointing
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111 chansess->x11listener = new_listener( &fd, 1, 0, chansess, x11accept, NULL);
10
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112 if (chansess->x11listener == NULL) {
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113 goto fail;
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diff changeset
114 }
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diff changeset
115
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116 return DROPBEAR_SUCCESS;
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117
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118 fail:
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119 /* cleanup */
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120 m_free(chansess->x11authprot);
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diff changeset
121 m_free(chansess->x11authcookie);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
122 close(fd);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
123
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
124 return DROPBEAR_FAILURE;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
125 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
126
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
127 /* accepts a new X11 socket */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
128 /* returns DROPBEAR_FAILURE or DROPBEAR_SUCCESS */
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
129 static void x11accept(struct Listener* listener, int sock) {
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
130
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
131 int fd;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
132 struct sockaddr_in addr;
1095
877256d1b3fb Expect len to be a type of socklen_t [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
133 socklen_t len;
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
134 int ret;
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 12
diff changeset
135 struct ChanSess * chansess = (struct ChanSess *)(listener->typedata);
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
136
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
137 len = sizeof(addr);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
138
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
139 fd = accept(sock, (struct sockaddr*)&addr, &len);
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
140 if (fd < 0) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
141 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
142 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
143
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
144 /* if single-connection we close it up */
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 12
diff changeset
145 if (chansess->x11singleconn) {
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 12
diff changeset
146 x11cleanup(chansess);
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
147 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
148
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
149 ret = send_msg_channel_open_x11(fd, &addr);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
150 if (ret == DROPBEAR_FAILURE) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
151 close(fd);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
152 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
153 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
154
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
155 /* This is called after switching to the user, and sets up the xauth
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
156 * and environment variables. */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
157 void x11setauth(struct ChanSess *chansess) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
158
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
159 char display[20]; /* space for "localhost:12345.123" */
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
160 FILE * authprog = NULL;
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
161 int val;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
162
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
163 if (chansess->x11listener == NULL) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
164 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
165 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
166
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
167 /* create the DISPLAY string */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
168 val = snprintf(display, sizeof(display), "localhost:%d.%d",
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
169 chansess->x11port - X11BASEPORT, chansess->x11screennum);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
170 if (val < 0 || val >= (int)sizeof(display)) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
171 /* string was truncated */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
172 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
173 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
174
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
175 addnewvar("DISPLAY", display);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
176
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
177 /* create the xauth string */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
178 val = snprintf(display, sizeof(display), "unix:%d.%d",
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
179 chansess->x11port - X11BASEPORT, chansess->x11screennum);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180 if (val < 0 || val >= (int)sizeof(display)) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
181 /* string was truncated */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
182 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
183 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
184
1229
a3e8389e01ff Validate xauth input
Matt Johnston <matt@ucc.asn.au>
parents: 1122
diff changeset
185 /* code is strongly based on OpenSSH's */
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
186 authprog = popen(XAUTH_COMMAND, "w");
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
187 if (authprog) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
188 fprintf(authprog, "add %s %s %s\n",
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
189 display, chansess->x11authprot, chansess->x11authcookie);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
190 pclose(authprog);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
191 } else {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
192 fprintf(stderr, "Failed to run %s\n", XAUTH_COMMAND);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
193 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
194 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
195
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 12
diff changeset
196 void x11cleanup(struct ChanSess *chansess) {
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
197
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
198 m_free(chansess->x11authprot);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
199 m_free(chansess->x11authcookie);
95
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
200
1038
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 941
diff changeset
201 TRACE(("chansess %p", (void*)chansess))
95
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
202 if (chansess->x11listener != NULL) {
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
203 remove_listener(chansess->x11listener);
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
204 chansess->x11listener = NULL;
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
205 }
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
206 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
208 static int x11_inithandler(struct Channel *channel) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
209 channel->prio = DROPBEAR_CHANNEL_PRIO_INTERACTIVE;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
210 return 0;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
211 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
212
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
213 static const struct ChanType chan_x11 = {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
214 0, /* sepfds */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
215 "x11",
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
216 x11_inithandler, /* inithandler */
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
217 NULL, /* checkclose */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
218 NULL, /* reqhandler */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
219 NULL /* closehandler */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220 };
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223 static int send_msg_channel_open_x11(int fd, struct sockaddr_in* addr) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
225 char* ipstring = NULL;
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 if (send_msg_channel_open_init(fd, &chan_x11) == DROPBEAR_SUCCESS) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
228 ipstring = inet_ntoa(addr->sin_addr);
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1095
diff changeset
229 buf_putstring(ses.writepayload, ipstring, strlen(ipstring));
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
230 buf_putint(ses.writepayload, addr->sin_port);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
232 encrypt_packet();
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
233 return DROPBEAR_SUCCESS;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
234 } else {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
235 return DROPBEAR_FAILURE;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
236 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
237
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
238 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
239
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
240 /* returns the port bound to, or -1 on failure.
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
241 * Will attempt to bind to a port X11BINDBASE (6010 usually) or upwards */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
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242 static int bindport(int fd) {
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243
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244 struct sockaddr_in addr;
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245 uint16_t port;
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246
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247 memset((void*)&addr, 0x0, sizeof(addr));
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248 addr.sin_family = AF_INET;
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249 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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250
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251 /* if we can't find one in 2000 ports free, something's wrong */
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252 for (port = X11BINDBASE; port < X11BINDBASE + 2000; port++) {
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253 addr.sin_port = htons(port);
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254 if (bind(fd, (struct sockaddr*)&addr,
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255 sizeof(struct sockaddr_in)) == 0) {
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256 /* success */
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257 return port;
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258 }
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259 if (errno == EADDRINUSE) {
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260 /* try the next port */
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261 continue;
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262 }
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263 /* otherwise it was an error we don't know about */
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a98a2138364a Improve capitalisation for all logged strings
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264 dropbear_log(LOG_DEBUG, "Failed to bind x11 socket");
10
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265 break;
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266 }
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267 return -1;
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268 }
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269 #endif /* DROPBEAR_X11FWD */