annotate svr-main.c @ 1816:96d573b40bb4

merge
author Matt Johnston <matt@ucc.asn.au>
date Wed, 31 Mar 2021 23:24:55 +0800
parents 6ea18ca8fc03
children 2b3a8026a6ce
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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94ee16f5b8a8 0.48 progress
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4 * Copyright (c) 2002-2006 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 #include "dbutil.h"
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27 #include "session.h"
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28 #include "buffer.h"
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29 #include "signkey.h"
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30 #include "runopts.h"
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31 #include "dbrandom.h"
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32 #include "crypto_desc.h"
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33
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34 static size_t listensockets(int *sock, size_t sockcount, int *maxfd);
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35 static void sigchld_handler(int dummy);
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36 static void sigsegv_handler(int);
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37 static void sigintterm_handler(int fish);
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38 #if INETD_MODE
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39 static void main_inetd(void);
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40 #endif
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41 #if NON_INETD_MODE
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42 static void main_noinetd(void);
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43 #endif
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44 static void commonsetup(void);
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45
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46 #if defined(DBMULTI_dropbear) || !DROPBEAR_MULTI
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47 #if defined(DBMULTI_dropbear) && DROPBEAR_MULTI
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48 int dropbear_main(int argc, char ** argv)
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49 #else
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50 int main(int argc, char ** argv)
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51 #endif
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52 {
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53 _dropbear_exit = svr_dropbear_exit;
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54 _dropbear_log = svr_dropbear_log;
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55
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56 disallow_core();
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57
71
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58 /* get commandline options */
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59 svr_getopts(argc, argv);
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60
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61 #if INETD_MODE
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62 /* service program mode */
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63 if (svr_opts.inetdmode) {
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64 main_inetd();
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65 /* notreached */
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66 }
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67 #endif
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68
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69 #if NON_INETD_MODE
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70 main_noinetd();
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71 /* notreached */
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72 #endif
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73
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74 dropbear_exit("Compiled without normal mode, can't run without -i\n");
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75 return -1;
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76 }
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77 #endif
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78
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79 #if INETD_MODE
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80 static void main_inetd() {
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81 char *host, *port = NULL;
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82
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83 /* Set up handlers, syslog */
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84 commonsetup();
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85
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86 seedrandom();
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87
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88 #if DEBUG_TRACE
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89 if (debug_trace) {
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90 /* -v output goes to stderr which would get sent over the inetd network socket */
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91 dropbear_exit("Dropbear inetd mode is incompatible with debug -v");
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92 }
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93 #endif
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94
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95 /* In case our inetd was lax in logging source addresses */
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96 get_socket_address(0, NULL, NULL, &host, &port, 0);
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97 dropbear_log(LOG_INFO, "Child connection from %s:%s", host, port);
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98 m_free(host);
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99 m_free(port);
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100
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101 /* Don't check the return value - it may just fail since inetd has
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102 * already done setsid() after forking (xinetd on Darwin appears to do
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103 * this */
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104 setsid();
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105
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106 /* Start service program
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107 * -1 is a dummy childpipe, just something we can close() without
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108 * mattering. */
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109 svr_session(0, -1);
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110
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111 /* notreached */
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112 }
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113 #endif /* INETD_MODE */
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114
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115 #if NON_INETD_MODE
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116 static void main_noinetd() {
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117 fd_set fds;
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118 unsigned int i, j;
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119 int val;
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120 int maxsock = -1;
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121 int listensocks[MAX_LISTEN_ADDR];
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122 size_t listensockcount = 0;
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123 FILE *pidfile = NULL;
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124
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125 int childpipes[MAX_UNAUTH_CLIENTS];
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126 char * preauth_addrs[MAX_UNAUTH_CLIENTS];
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127
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128 int childsock;
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129 int childpipe[2];
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130
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131 /* Note: commonsetup() must happen before we daemon()ise. Otherwise
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132 daemon() will chdir("/"), and we won't be able to find local-dir
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133 hostkeys. */
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134 commonsetup();
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135
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136 /* sockets to identify pre-authenticated clients */
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137 for (i = 0; i < MAX_UNAUTH_CLIENTS; i++) {
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parents: 445
diff changeset
138 childpipes[i] = -1;
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background,
Matt Johnston <matt@ucc.asn.au>
parents: 445
diff changeset
139 }
539
07a58e4da1ac use memset() rather than bzero()
Matt Johnston <matt@ucc.asn.au>
parents: 476
diff changeset
140 memset(preauth_addrs, 0x0, sizeof(preauth_addrs));
447
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background,
Matt Johnston <matt@ucc.asn.au>
parents: 445
diff changeset
141
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background,
Matt Johnston <matt@ucc.asn.au>
parents: 445
diff changeset
142 /* Set up the listening sockets */
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background,
Matt Johnston <matt@ucc.asn.au>
parents: 445
diff changeset
143 listensockcount = listensockets(listensocks, MAX_LISTEN_ADDR, &maxsock);
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background,
Matt Johnston <matt@ucc.asn.au>
parents: 445
diff changeset
144 if (listensockcount == 0)
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background,
Matt Johnston <matt@ucc.asn.au>
parents: 445
diff changeset
145 {
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background,
Matt Johnston <matt@ucc.asn.au>
parents: 445
diff changeset
146 dropbear_exit("No listening ports available.");
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background,
Matt Johnston <matt@ucc.asn.au>
parents: 445
diff changeset
147 }
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background,
Matt Johnston <matt@ucc.asn.au>
parents: 445
diff changeset
148
871
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
149 for (i = 0; i < listensockcount; i++) {
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
150 FD_SET(listensocks[i], &fds);
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
151 }
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
152
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
153 /* fork */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
154 if (svr_opts.forkbg) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
155 int closefds = 0;
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1276
diff changeset
156 #if !DEBUG_TRACE
1210
64a50eac1030 Moved usingsyslog from svr_runopts to runopts.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1084
diff changeset
157 if (!opts.usingsyslog) {
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
158 closefds = 1;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
159 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
160 #endif
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
161 if (daemon(0, closefds) < 0) {
71
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
162 dropbear_exit("Failed to daemonize: %s", strerror(errno));
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
163 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
164 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
165
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
166 /* should be done after syslog is working */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
167 if (svr_opts.forkbg) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
168 dropbear_log(LOG_INFO, "Running in background");
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
169 } else {
445
edbee0596531 "backgrounding" is more user-understandable than "forking"
Matt Johnston <matt@ucc.asn.au>
parents: 435
diff changeset
170 dropbear_log(LOG_INFO, "Not backgrounding");
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
171 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
172
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
173 /* create a PID file so that we can be killed easily */
323
3bfbe95f9a14 Add -P pidfile patch from Swen Schillig
Matt Johnston <matt@ucc.asn.au>
parents: 298
diff changeset
174 pidfile = fopen(svr_opts.pidfile, "w");
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
175 if (pidfile) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
176 fprintf(pidfile, "%d\n", getpid());
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
177 fclose(pidfile);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
178 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
179
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180 /* incoming connection select loop */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
181 for(;;) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
182
1596
60fceff95858 workaround memory sanitizer FD_ZERO false positives
Matt Johnston <matt@ucc.asn.au>
parents: 1508
diff changeset
183 DROPBEAR_FD_ZERO(&fds);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
184
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
185 /* listening sockets */
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
186 for (i = 0; i < listensockcount; i++) {
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
187 FD_SET(listensocks[i], &fds);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
188 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
189
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
190 /* pre-authentication clients */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
191 for (i = 0; i < MAX_UNAUTH_CLIENTS; i++) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
192 if (childpipes[i] >= 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
193 FD_SET(childpipes[i], &fds);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
194 maxsock = MAX(maxsock, childpipes[i]);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
195 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
196 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
197
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
198 val = select(maxsock+1, &fds, NULL, NULL, NULL);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
199
1495
0c16b4ccbd54 make signal flags volatile, simplify handling
Matt Johnston <matt@ucc.asn.au>
parents: 1295
diff changeset
200 if (ses.exitflag) {
323
3bfbe95f9a14 Add -P pidfile patch from Swen Schillig
Matt Johnston <matt@ucc.asn.au>
parents: 298
diff changeset
201 unlink(svr_opts.pidfile);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
202 dropbear_exit("Terminated by signal");
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 if (val == 0) {
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 447
diff changeset
206 /* timeout reached - shouldn't happen. eh */
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
208 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
210 if (val < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
211 if (errno == EINTR) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
212 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
213 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
214 dropbear_exit("Listening socket error");
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
215 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
216
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
217 /* close fds which have been authed or closed - svr-auth.c handles
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
218 * closing the auth sockets on success */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
219 for (i = 0; i < MAX_UNAUTH_CLIENTS; i++) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220 if (childpipes[i] >= 0 && FD_ISSET(childpipes[i], &fds)) {
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
221 m_close(childpipes[i]);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 childpipes[i] = -1;
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
223 m_free(preauth_addrs[i]);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 /* handle each socket which has something to say */
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
228 for (i = 0; i < listensockcount; i++) {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
229 size_t num_unauthed_for_addr = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
230 size_t num_unauthed_total = 0;
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
231 char *remote_host = NULL, *remote_port = NULL;
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
232 pid_t fork_ret = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
233 size_t conn_idx = 0;
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
234 struct sockaddr_storage remoteaddr;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
235 socklen_t remoteaddrlen;
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
236
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
237 if (!FD_ISSET(listensocks[i], &fds))
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
238 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
239
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 30
diff changeset
240 remoteaddrlen = sizeof(remoteaddr);
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
241 childsock = accept(listensocks[i],
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
242 (struct sockaddr*)&remoteaddr, &remoteaddrlen);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
243
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
244 if (childsock < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
245 /* accept failed */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
246 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
247 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
248
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
249 /* Limit the number of unauthenticated connections per IP */
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
250 getaddrstring(&remoteaddr, &remote_host, NULL, 0);
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
251
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
252 num_unauthed_for_addr = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
253 num_unauthed_total = 0;
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
254 for (j = 0; j < MAX_UNAUTH_CLIENTS; j++) {
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
255 if (childpipes[j] >= 0) {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
256 num_unauthed_total++;
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
257 if (strcmp(remote_host, preauth_addrs[j]) == 0) {
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
258 num_unauthed_for_addr++;
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
259 }
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
260 } else {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
261 /* a free slot */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
262 conn_idx = j;
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
263 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
264 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
265
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
266 if (num_unauthed_total >= MAX_UNAUTH_CLIENTS
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
267 || num_unauthed_for_addr >= MAX_UNAUTH_PER_IP) {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
268 goto out;
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
269 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
270
687
167fdc091c05 Improve RNG seeding.
Matt Johnston <matt@ucc.asn.au>
parents: 658
diff changeset
271 seedrandom();
167fdc091c05 Improve RNG seeding.
Matt Johnston <matt@ucc.asn.au>
parents: 658
diff changeset
272
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
273 if (pipe(childpipe) < 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 158
diff changeset
274 TRACE(("error creating child pipe"))
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
275 goto out;
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
276 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
277
1677
e05c0e394f1d Make DEBUG_NOFORK a #if not #ifdef
Matt Johnston <matt@ucc.asn.au>
parents: 1596
diff changeset
278 #if DEBUG_NOFORK
476
df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
279 fork_ret = 0;
df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
280 #else
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
281 fork_ret = fork();
476
df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
282 #endif
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
283 if (fork_ret < 0) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
284 dropbear_log(LOG_WARNING, "Error forking: %s", strerror(errno));
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
285 goto out;
687
167fdc091c05 Improve RNG seeding.
Matt Johnston <matt@ucc.asn.au>
parents: 658
diff changeset
286 }
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
287
723
0fd32a552ea5 Fix a few compile warnings
Matt Johnston <matt@ucc.asn.au>
parents: 687
diff changeset
288 addrandom((void*)&fork_ret, sizeof(fork_ret));
687
167fdc091c05 Improve RNG seeding.
Matt Johnston <matt@ucc.asn.au>
parents: 658
diff changeset
289
167fdc091c05 Improve RNG seeding.
Matt Johnston <matt@ucc.asn.au>
parents: 658
diff changeset
290 if (fork_ret > 0) {
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
291
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
292 /* parent */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
293 childpipes[conn_idx] = childpipe[0];
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
294 m_close(childpipe[1]);
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
295 preauth_addrs[conn_idx] = remote_host;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
296 remote_host = NULL;
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
297
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
298 } else {
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
299
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
300 /* child */
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
301 getaddrstring(&remoteaddr, NULL, &remote_port, 0);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
302 dropbear_log(LOG_INFO, "Child connection from %s:%s", remote_host, remote_port);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
303 m_free(remote_host);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
304 m_free(remote_port);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
305
476
df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
306 #ifndef DEBUG_NOFORK
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
307 if (setsid() < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
308 dropbear_exit("setsid: %s", strerror(errno));
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
309 }
476
df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
310 #endif
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
311
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
312 /* make sure we close sockets */
1270
6d00eca524fe rename loop variable
Francois Perrad <francois.perrad@gadz.org>
parents: 1250
diff changeset
313 for (j = 0; j < listensockcount; j++) {
6d00eca524fe rename loop variable
Francois Perrad <francois.perrad@gadz.org>
parents: 1250
diff changeset
314 m_close(listensocks[j]);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
315 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
316
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
317 m_close(childpipe[0]);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
318
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
319 /* start the session */
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
320 svr_session(childsock, childpipe[1]);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
321 /* don't return */
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
322 dropbear_assert(0);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
323 }
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
324
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
325 out:
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
326 /* This section is important for the parent too */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
327 m_close(childsock);
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
328 if (remote_host) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 539
diff changeset
329 m_free(remote_host);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
330 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
332 } /* for(;;) loop */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
333
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334 /* don't reach here */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335 }
71
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
336 #endif /* NON_INETD_MODE */
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
337
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
338
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
339 /* catch + reap zombie children */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 101
diff changeset
340 static void sigchld_handler(int UNUSED(unused)) {
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
341 struct sigaction sa_chld;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
342
893
860e3522f8fc - Save errno in signal handlers
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
343 const int saved_errno = errno;
860e3522f8fc - Save errno in signal handlers
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
344
1271
26622eee1e8b Suspicious use of ;
Francois Perrad <francois.perrad@gadz.org>
parents: 1270
diff changeset
345 while(waitpid(-1, NULL, WNOHANG) > 0) {}
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
346
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
347 sa_chld.sa_handler = sigchld_handler;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
348 sa_chld.sa_flags = SA_NOCLDSTOP;
1001
a48561559584 Initialise sa_mask
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
349 sigemptyset(&sa_chld.sa_mask);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
350 if (sigaction(SIGCHLD, &sa_chld, NULL) < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
351 dropbear_exit("signal() error");
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
352 }
893
860e3522f8fc - Save errno in signal handlers
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
353 errno = saved_errno;
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
354 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
355
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
356 /* catch any segvs */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 101
diff changeset
357 static void sigsegv_handler(int UNUSED(unused)) {
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
358 fprintf(stderr, "Aiee, segfault! You should probably report "
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
359 "this as a bug to the developer\n");
893
860e3522f8fc - Save errno in signal handlers
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
360 _exit(EXIT_FAILURE);
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
361 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
362
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363 /* catch ctrl-c or sigterm */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 101
diff changeset
364 static void sigintterm_handler(int UNUSED(unused)) {
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
365
1495
0c16b4ccbd54 make signal flags volatile, simplify handling
Matt Johnston <matt@ucc.asn.au>
parents: 1295
diff changeset
366 ses.exitflag = 1;
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
367 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
368
71
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
369 /* Things used by inetd and non-inetd modes */
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
370 static void commonsetup() {
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
371
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
372 struct sigaction sa_chld;
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
373 #ifndef DISABLE_SYSLOG
1210
64a50eac1030 Moved usingsyslog from svr_runopts to runopts.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1084
diff changeset
374 if (opts.usingsyslog) {
1211
6ecc133fb2ee Allow setting syslog identifier via startsyslog().
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1210
diff changeset
375 startsyslog(PROGNAME);
71
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
376 }
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
377 #endif
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
378
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
379 /* set up cleanup handler */
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
380 if (signal(SIGINT, sigintterm_handler) == SIG_ERR ||
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
381 #ifndef DEBUG_VALGRIND
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
382 signal(SIGTERM, sigintterm_handler) == SIG_ERR ||
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
383 #endif
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
384 signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
385 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
386 }
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
387
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
388 /* catch and reap zombie children */
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
389 sa_chld.sa_handler = sigchld_handler;
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
390 sa_chld.sa_flags = SA_NOCLDSTOP;
658
d4d0279710b9 - Initialise sa_mask properly
Matt Johnston <matt@ucc.asn.au>
parents: 656
diff changeset
391 sigemptyset(&sa_chld.sa_mask);
71
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
392 if (sigaction(SIGCHLD, &sa_chld, NULL) < 0) {
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
393 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
394 }
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
395 if (signal(SIGSEGV, sigsegv_handler) == SIG_ERR) {
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
396 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
397 }
113
775c6cbfe995 Load the hostkeys for inetd too - oops
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
398
795
7f604f9b3756 ecdsa is working
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
399 crypto_init();
7f604f9b3756 ecdsa is working
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
400
113
775c6cbfe995 Load the hostkeys for inetd too - oops
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
401 /* Now we can setup the hostkeys - needs to be after logging is on,
775c6cbfe995 Load the hostkeys for inetd too - oops
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
402 * otherwise we might end up blatting error messages to the socket */
795
7f604f9b3756 ecdsa is working
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
403 load_all_hostkeys();
71
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
404 }
ac96bc733e71 adding inetd mode back from 0.43
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
405
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
406 /* Set up listening sockets for all the requested ports */
1023
a00303a7d247 tcp fastopen for the server
Matt Johnston <matt@ucc.asn.au>
parents: 1001
diff changeset
407 static size_t listensockets(int *socks, size_t sockcount, int *maxfd) {
a00303a7d247 tcp fastopen for the server
Matt Johnston <matt@ucc.asn.au>
parents: 1001
diff changeset
408
a00303a7d247 tcp fastopen for the server
Matt Johnston <matt@ucc.asn.au>
parents: 1001
diff changeset
409 unsigned int i, n;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 30
diff changeset
410 char* errstring = NULL;
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
411 size_t sockpos = 0;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 30
diff changeset
412 int nsock;
30
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
413
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 893
diff changeset
414 TRACE(("listensockets: %d to try", svr_opts.portcount))
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 71
diff changeset
415
30
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416 for (i = 0; i < svr_opts.portcount; i++) {
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417
434
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418 TRACE(("listening on '%s:%s'", svr_opts.addresses[i], svr_opts.ports[i]))
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419
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420 nsock = dropbear_listen(svr_opts.addresses[i], svr_opts.ports[i], &socks[sockpos],
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421 sockcount - sockpos,
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422 &errstring, maxfd);
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423
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424 if (nsock < 0) {
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425 dropbear_log(LOG_WARNING, "Failed listening on '%s': %s",
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426 svr_opts.ports[i], errstring);
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427 m_free(errstring);
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428 continue;
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429 }
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430
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431 for (n = 0; n < (unsigned int)nsock; n++) {
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432 int sock = socks[sockpos + n];
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433 set_sock_priority(sock, DROPBEAR_PRIO_LOWDELAY);
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434 #if DROPBEAR_SERVER_TCP_FAST_OPEN
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435 set_listen_fast_open(sock);
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436 #endif
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437 }
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438
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diff changeset
439 sockpos += nsock;
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440
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441 }
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442 return sockpos;
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443 }