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annotate svr-x11fwd.c @ 66:38c3146aa23d

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Some more sanity-checking of args, and just warn and ignore OpenSSH args
author Matt Johnston <matt@ucc.asn.au>
date Thu, 12 Aug 2004 14:19:05 +0000
parents 20563735e8b5
children b0316ce64e4b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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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"
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36
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37 #define X11BASEPORT 6000
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38 #define X11BINDBASE 6010
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39
62
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40 static void x11accept(struct Listener* listener, int sock);
10
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41 static int bindport(int fd);
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42 static int send_msg_channel_open_x11(int fd, struct sockaddr_in* addr);
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43
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44 /* called as a request for a session channel, sets up listening X11 */
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45 /* returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
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46 int x11req(struct ChanSess * chansess) {
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47
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48 int fd;
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49
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50 /* we already have an x11 connection */
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51 if (chansess->x11listener != NULL) {
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52 return DROPBEAR_FAILURE;
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53 }
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54
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55 chansess->x11singleconn = buf_getbyte(ses.payload);
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56 chansess->x11authprot = buf_getstring(ses.payload, NULL);
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57 chansess->x11authcookie = buf_getstring(ses.payload, NULL);
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58 chansess->x11screennum = buf_getint(ses.payload);
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59
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60 /* create listening socket */
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61 fd = socket(PF_INET, SOCK_STREAM, 0);
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62 if (fd < 0) {
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63 goto fail;
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64 }
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65
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66 /* allocate port and bind */
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67 chansess->x11port = bindport(fd);
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68 if (chansess->x11port < 0) {
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69 goto fail;
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70 }
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71
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72 /* listen */
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73 if (listen(fd, 20) < 0) {
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74 goto fail;
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75 }
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76
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77 /* set non-blocking */
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78 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
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79 goto fail;
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80 }
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81
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82 /* listener code will handle the socket now.
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83 * No cleanup handler needed, since listener_remove only happens
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84 * from our cleanup anyway */
62
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85 chansess->x11listener = new_listener( &fd, 1, 0, chansess, x11accept, NULL);
10
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86 if (chansess->x11listener == NULL) {
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87 goto fail;
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88 }
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89
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90 return DROPBEAR_SUCCESS;
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91
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92 fail:
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93 /* cleanup */
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94 m_free(chansess->x11authprot);
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95 m_free(chansess->x11authcookie);
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96 close(fd);
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97
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98 return DROPBEAR_FAILURE;
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99 }
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100
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101 /* accepts a new X11 socket */
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102 /* returns DROPBEAR_FAILURE or DROPBEAR_SUCCESS */
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103 static void x11accept(struct Listener* listener, int sock) {
10
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104
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105 int fd;
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106 struct sockaddr_in addr;
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107 int len;
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108 int ret;
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
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109 struct ChanSess * chansess = (struct ChanSess *)(listener->typedata);
10
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110
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111 len = sizeof(addr);
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112
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113 fd = accept(sock, (struct sockaddr*)&addr, &len);
10
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114 if (fd < 0) {
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115 return;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
116 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
117
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
118 /* 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
119 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
120 x11cleanup(chansess);
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
121 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
122
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
123 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
124 if (ret == DROPBEAR_FAILURE) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
125 close(fd);
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 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
128
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
129 /* 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
130 * and environment variables. */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
131 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
132
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
133 char display[20]; /* space for "localhost:12345.123" */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
134 FILE * authprog;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
135 int val;
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 if (chansess->x11listener == NULL) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
138 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
139 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
140
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
141 /* create the DISPLAY string */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
142 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
143 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
144 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
145 /* string was truncated */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
146 return;
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 addnewvar("DISPLAY", display);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
150
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
151 /* create the xauth string */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
152 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
153 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
154 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
155 /* string was truncated */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
156 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
157 }
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 /* popen is a nice function - code is strongly based on OpenSSH's */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
160 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
161 if (authprog) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
162 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
163 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
164 pclose(authprog);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
165 } else {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
166 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
167 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
168 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
169
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
170 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
171
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
172 m_free(chansess->x11authprot);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
173 m_free(chansess->x11authcookie);
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
174 remove_listener(chansess->x11listener);
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
175 chansess->x11listener = NULL;
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
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
178 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
179 0, /* sepfds */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180 "x11",
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
181 NULL, /* inithandler */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
182 NULL, /* checkclose */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
183 NULL, /* reqhandler */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
184 NULL /* closehandler */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
185 };
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
186
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
187
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
188 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
189
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
190 char* ipstring;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
191
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
192 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
193 ipstring = inet_ntoa(addr->sin_addr);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
194 buf_putstring(ses.writepayload, ipstring, strlen(ipstring));
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
195 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
196
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
197 encrypt_packet();
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
198 return DROPBEAR_SUCCESS;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
199 } else {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
200 return DROPBEAR_FAILURE;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
201 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
202
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 /* 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
206 * Will attempt to bind to a port X11BINDBASE (6010 usually) or upwards */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207 static int bindport(int fd) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
208
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209 struct sockaddr_in addr;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
210 uint16_t port;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
211
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
212 memset((void*)&addr, 0x0, sizeof(addr));
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
213 addr.sin_family = AF_INET;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
214 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
215
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
216 /* if we can't find one in 2000 ports free, something's wrong */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
217 for (port = X11BINDBASE; port < X11BINDBASE + 2000; port++) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
218 addr.sin_port = htons(port);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
219 if (bind(fd, (struct sockaddr*)&addr,
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220 sizeof(struct sockaddr_in)) == 0) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221 /* success */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 return port;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224 if (errno == EADDRINUSE) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 /* try the next port */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 continue;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
228 /* otherwise it was an error we don't know about */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
229 dropbear_log(LOG_DEBUG, "failed to bind x11 socket");
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
230 break;
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 return -1;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
233 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
234 #endif /* DROPBEAR_X11FWD */