dropbear: svr-main.c annotate

annotate svr-main.c @ 287:b72f98803e46

Update to scp from OpenSSH portable 4.3p2

author	Matt Johnston <matt@ucc.asn.au>
date	Wed, 08 Mar 2006 14:20:24 +0000
parents	1f5ec029dfe8
children	94ee16f5b8a8

rev	line source
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /*
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 * Dropbear - a SSH2 server
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 *
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 * Copyright (c) 2002,2003 Matt Johnston
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 * All rights reserved.
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 *
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7 * Permission is hereby granted, free of charge, to any person obtaining a copy
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 * of this software and associated documentation files (the "Software"), to deal
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9 * in the Software without restriction, including without limitation the rights
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11 * copies of the Software, and to permit persons to whom the Software is
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12 * furnished to do so, subject to the following conditions:
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 *
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 * The above copyright notice and this permission notice shall be included in
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 * all copies or substantial portions of the Software.
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 *
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23 * SOFTWARE. */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	25 #include "includes.h"
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 #include "dbutil.h"
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 #include "session.h"
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 #include "buffer.h"
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 #include "signkey.h"
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 #include "runopts.h"
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	32 static size_t listensockets(int sock, size_t sockcount, int maxfd);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 static void sigchld_handler(int dummy);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 static void sigsegv_handler(int);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35 static void sigintterm_handler(int fish);
156 8c2b3506f112 Rearrange preprocessor parts so that compilation with various options Matt Johnston <matt@ucc.asn.au> parents: 113 diff changeset	36 #ifdef INETD_MODE
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	37 static void main_inetd();
156 8c2b3506f112 Rearrange preprocessor parts so that compilation with various options Matt Johnston <matt@ucc.asn.au> parents: 113 diff changeset	38 #endif
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options Matt Johnston <matt@ucc.asn.au> parents: 113 diff changeset	39 #ifdef NON_INETD_MODE
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	40 static void main_noinetd();
156 8c2b3506f112 Rearrange preprocessor parts so that compilation with various options Matt Johnston <matt@ucc.asn.au> parents: 113 diff changeset	41 #endif
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	42 static void commonsetup();
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	43
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44 #if defined(DBMULTI_dropbear) \|\| !defined(DROPBEAR_MULTI)
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 #if defined(DBMULTI_dropbear) && defined(DROPBEAR_MULTI)
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 int dropbear_main(int argc, char ** argv)
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	47 #else
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48 int main(int argc, char ** argv)
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 #endif
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50 {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	51
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	52
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	53 _dropbear_exit = svr_dropbear_exit;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	54 _dropbear_log = svr_dropbear_log;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	55
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	56 /* get commandline options */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	57 svr_getopts(argc, argv);
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	58
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	59 #ifdef INETD_MODE
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	60 /* service program mode */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	61 if (svr_opts.inetdmode) {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	62 main_inetd();
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	63 /* notreached */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	64 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	65 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	66
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	67 #ifdef NON_INETD_MODE
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	68 main_noinetd();
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	69 /* notreached */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	70 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	71
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	72 dropbear_exit("Compiled without normal mode, can't run without -i\n");
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	73 return -1;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	74 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	75 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	76
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	77 #ifdef INETD_MODE
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	78 static void main_inetd() {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	79
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	80 struct sockaddr_storage remoteaddr;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	81 socklen_t remoteaddrlen;
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	82 char * addrstring = NULL;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	83
272 3be7ae2e8dfa Only read /dev/random once when the program starts Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	84 /* Set up handlers, syslog, seed random */
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	85 commonsetup();
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	86
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	87 remoteaddrlen = sizeof(remoteaddr);
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	88 if (getpeername(0, (struct sockaddr*)&remoteaddr, &remoteaddrlen) < 0) {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	89 dropbear_exit("Unable to getpeername: %s", strerror(errno));
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	90 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	91
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	92 /* In case our inetd was lax in logging source addresses */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	93 addrstring = getaddrstring(&remoteaddr, 1);
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	94 dropbear_log(LOG_INFO, "Child connection from %s", addrstring);
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	95
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	96 /* Don't check the return value - it may just fail since inetd has
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	97 * already done setsid() after forking (xinetd on Darwin appears to do
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	98 * this */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	99 setsid();
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	100
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	101 /* Start service program
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	102 * -1 is a dummy childpipe, just something we can close() without
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	103 * mattering. */
158 364a75cfebab Log the IP along with auth success/fail attempts Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	104 svr_session(0, -1, getaddrhostname(&remoteaddr), addrstring);
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	105
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	106 /* notreached */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	107 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	108 #endif /* INETD_MODE */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	109
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	110 #ifdef NON_INETD_MODE
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	111 void main_noinetd() {
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112 fd_set fds;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113 struct timeval seltimeout;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114 unsigned int i, j;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	115 int val;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	116 int maxsock = -1;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117 int listensocks[MAX_LISTEN_ADDR];
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	118 size_t listensockcount = 0;
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	119 FILE *pidfile = NULL;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	121 int childpipes[MAX_UNAUTH_CLIENTS];
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	122 char * preauth_addrs[MAX_UNAUTH_CLIENTS];
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	123
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124 int childsock;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125 int childpipe[2];
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	126
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127 /* fork */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128 if (svr_opts.forkbg) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 int closefds = 0;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130 #ifndef DEBUG_TRACE
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131 if (!svr_opts.usingsyslog) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 closefds = 1;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134 #endif
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	135 if (daemon(0, closefds) < 0) {
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	136 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	137 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	138 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	139
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	140 commonsetup();
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141
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	142
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 /* 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	144 if (svr_opts.forkbg) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145 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	146 } else {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147 dropbear_log(LOG_INFO, "Not forking");
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150 /* create a PID file so that we can be killed easily */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 pidfile = fopen(DROPBEAR_PIDFILE, "w");
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 if (pidfile) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 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	154 fclose(pidfile);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157 /* sockets to identify pre-authenticated clients */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 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	159 childpipes[i] = -1;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160 }
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	161 bzero(preauth_addrs, sizeof(preauth_addrs));
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163 /* Set up the listening sockets */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	164 /* XXX XXX ports */
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	165 listensockcount = listensockets(listensocks, MAX_LISTEN_ADDR, &maxsock);
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	166 if (listensockcount == 0)
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	167 {
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	168 dropbear_exit("No listening ports available.");
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	169 }
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 /* incoming connection select loop */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	172 for(;;) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174 FD_ZERO(&fds);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176 seltimeout.tv_sec = 60;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 seltimeout.tv_usec = 0;
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 /* listening sockets */
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	180 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	181 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	182 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	183
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184 /* pre-authentication clients */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	185 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	186 if (childpipes[i] >= 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187 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	188 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	189 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	191
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192 val = select(maxsock+1, &fds, NULL, NULL, &seltimeout);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 if (exitflag) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195 unlink(DROPBEAR_PIDFILE);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 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	197 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 if (val == 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 /* timeout reached */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	201 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202 }
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 if (val < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 if (errno == EINTR) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208 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	209 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	210
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	211 /* 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	212 * 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	213 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	214 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	215 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	216 childpipes[i] = -1;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	217 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	218 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	219 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221 /* 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	222 for (i = 0; i < listensockcount; i++) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	223
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	224 struct sockaddr_storage remoteaddr;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	225 socklen_t remoteaddrlen = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	226 size_t num_unauthed_for_addr = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	227 size_t num_unauthed_total = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	228 char * remote_addr_str = NULL;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	229 pid_t fork_ret = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	230 size_t conn_idx = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	231
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 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	233 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	235 remoteaddrlen = sizeof(remoteaddr);
63 dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	236 childsock = accept(listensocks[i],
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	237 (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	238
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239 if (childsock < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240 /* accept failed */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	244 /* Limit the number of unauthenticated connections per IP */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	245 remote_addr_str = getaddrstring(&remoteaddr, 0);
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	246
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	247 num_unauthed_for_addr = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	248 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	249 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	250 if (childpipes[j] >= 0) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	251 num_unauthed_total++;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	252 if (strcmp(remote_addr_str, preauth_addrs[j]) == 0) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	253 num_unauthed_for_addr++;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	254 }
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	255 } else {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	256 /* a free slot */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	257 conn_idx = j;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	258 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	260
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	261 if (num_unauthed_total >= MAX_UNAUTH_CLIENTS
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	262 \|\| 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	263 goto out;
30 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
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 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	267 TRACE(("error creating child pipe"))
277 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
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	271 fork_ret = fork();
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	272 if (fork_ret < 0) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	273 dropbear_log(LOG_WARNING, "error forking: %s", strerror(errno));
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	274 goto out;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	275
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	276 } else if (fork_ret > 0) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	277
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	278 /* parent */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	279 childpipes[conn_idx] = childpipe[0];
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	280 m_close(childpipe[1]);
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	281 preauth_addrs[conn_idx] = remote_addr_str;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	282 remote_addr_str = NULL;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	283
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	284 } else {
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	285
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	286 /* child */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	287 char * addrstring = NULL;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	288 #ifdef DEBUG_FORKGPROF
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289 extern void _start(void), etext(void);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	290 monstartup((u_long)&_start, (u_long)&etext);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291 #endif /* DEBUG_FORKGPROF */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	293 m_free(remote_addr_str);
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	294 addrstring = getaddrstring(&remoteaddr, 1);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	295 dropbear_log(LOG_INFO, "Child connection from %s", addrstring);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	296
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297 if (setsid() < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 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	299 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	300
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	301 /* make sure we close sockets */
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	302 for (i = 0; i < listensockcount; i++) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	303 m_close(listensocks[i]);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	304 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	305
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	306 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	307
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	308 /* start the session */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	309 svr_session(childsock, childpipe[1],
158 364a75cfebab Log the IP along with auth success/fail attempts Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	310 getaddrhostname(&remoteaddr),
364a75cfebab Log the IP along with auth success/fail attempts Matt Johnston <matt@ucc.asn.au> parents: 156 diff changeset	311 addrstring);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	312 /* don't return */
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	313 dropbear_assert(0);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	314 }
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	315
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	316 out:
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	317 /* 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	318 m_close(childsock);
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	319 if (remote_addr_str) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	320 m_free(remote_addr_str);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	321 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	322 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	323 } /* for(;;) loop */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	324
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	325 /* don't reach here */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	326 }
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	327 #endif /* NON_INETD_MODE */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	328
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	329
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	330 /* catch + reap zombie children */
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 101 diff changeset	331 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	332 struct sigaction sa_chld;
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 while(waitpid(-1, NULL, WNOHANG) > 0);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	335
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	336 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	337 sa_chld.sa_flags = SA_NOCLDSTOP;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	338 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	339 dropbear_exit("signal() error");
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	340 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	341 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	342
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	343 /* catch any segvs */
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 101 diff changeset	344 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	345 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	346 "this as a bug to the developer\n");
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	347 exit(EXIT_FAILURE);
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	348 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	349
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	350 /* catch ctrl-c or sigterm */
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 101 diff changeset	351 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	352
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	353 exitflag = 1;
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
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	356 /* 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	357 static void commonsetup() {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	358
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	359 struct sigaction sa_chld;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	360 #ifndef DISABLE_SYSLOG
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	361 if (svr_opts.usingsyslog) {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	362 startsyslog();
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	363 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	364 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	365
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	366 /* set up cleanup handler */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	367 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	368 #ifndef DEBUG_VALGRIND
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	369 signal(SIGTERM, sigintterm_handler) == SIG_ERR \|\|
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	370 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	371 signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	372 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	373 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	374
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	375 /* catch and reap zombie children */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	376 sa_chld.sa_handler = sigchld_handler;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	377 sa_chld.sa_flags = SA_NOCLDSTOP;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	378 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	379 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	380 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	381 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	382 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	383 }
113 775c6cbfe995 Load the hostkeys for inetd too - oops Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	384
775c6cbfe995 Load the hostkeys for inetd too - oops Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	385 /* 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	386 * otherwise we might end up blatting error messages to the socket */
775c6cbfe995 Load the hostkeys for inetd too - oops Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	387 loadhostkeys();
272 3be7ae2e8dfa Only read /dev/random once when the program starts Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	388
3be7ae2e8dfa Only read /dev/random once when the program starts Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	389 seedrandom();
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	390 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	391
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	392 /* Set up listening sockets for all the requested ports */
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	393 static size_t listensockets(int sock, size_t sockcount, int maxfd) {
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	394
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	395 unsigned int i;
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	396 char* errstring = NULL;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	397 size_t sockpos = 0;
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	398 int nsock;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	399
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	400 TRACE(("listensockets: %d to try\n", 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	401
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	402 for (i = 0; i < svr_opts.portcount; i++) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	403
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	404 TRACE(("listening on '%s'", svr_opts.ports[i]))
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	405
258 306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local Matt Johnston <matt@ucc.asn.au> parents: 241 diff changeset	406 nsock = dropbear_listen("", svr_opts.ports[i], &sock[sockpos],
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	407 sockcount - sockpos,
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	408 &errstring, maxfd);
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	409
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	410 if (nsock < 0) {
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	411 dropbear_log(LOG_WARNING, "Failed listening on '%s': %s",
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	412 svr_opts.ports[i], errstring);
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	413 m_free(errstring);
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	414 continue;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	415 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	417 sockpos += nsock;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	418
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419 }
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	420 return sockpos;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	421 }

Mercurial > dropbear

annotate svr-main.c @ 287:b72f98803e46