dropbear: svr-main.c annotate

annotate svr-main.c @ 735:73b6e5d8801b

Fix segfault when /dev/urandom isn't writable

author	Matt Johnston <matt@ucc.asn.au>
date	Tue, 02 Apr 2013 18:53:18 +0800
parents	0fd32a552ea5
children	7f604f9b3756

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 *
290 94ee16f5b8a8 0.48 progress Matt Johnston <matt@ucc.asn.au> parents: 279 diff changeset	4 * Copyright (c) 2002-2006 Matt Johnston
30 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"
298 7dad470ad4aa minor cleanups for some warnings Matt Johnston <matt@ucc.asn.au> parents: 290 diff changeset	31 #include "random.h"
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	33 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	34 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	35 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	36 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	37 #ifdef INETD_MODE
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	38 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	39 #endif
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options Matt Johnston <matt@ucc.asn.au> parents: 113 diff changeset	40 #ifdef NON_INETD_MODE
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	41 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	42 #endif
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	43 static void commonsetup();
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44
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 #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	47 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	48 #else
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 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	50 #endif
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 _dropbear_exit = svr_dropbear_exit;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	53 _dropbear_log = svr_dropbear_log;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	54
425 1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 379 diff changeset	55 disallow_core();
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 379 diff changeset	56
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	57 /* get commandline options */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	58 svr_getopts(argc, argv);
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	59
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	60 #ifdef INETD_MODE
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	61 /* service program mode */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	62 if (svr_opts.inetdmode) {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	63 main_inetd();
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	64 /* notreached */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	65 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	66 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	67
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	68 #ifdef NON_INETD_MODE
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	69 main_noinetd();
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	70 /* notreached */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	71 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	72
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	73 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	74 return -1;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	75 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	76 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	77
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	78 #ifdef INETD_MODE
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	79 static void main_inetd() {
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	80 char host, port = NULL;
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	81
272 3be7ae2e8dfa Only read /dev/random once when the program starts Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	82 /* 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	83 commonsetup();
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	84
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	85 /* In case our inetd was lax in logging source addresses */
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	86 get_socket_address(0, NULL, NULL, &host, &port, 0);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	87 dropbear_log(LOG_INFO, "Child connection from %s:%s", host, port);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	88 m_free(host);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	89 m_free(port);
71 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 /* 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	92 * 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	93 * this */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	94 setsid();
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 /* Start service program
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	97 * -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	98 * mattering. */
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	99 svr_session(0, -1);
71 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 /* notreached */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	102 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	103 #endif /* INETD_MODE */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	104
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	105 #ifdef NON_INETD_MODE
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	106 void main_noinetd() {
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	107 fd_set fds;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108 unsigned int i, j;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109 int val;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110 int maxsock = -1;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111 int listensocks[MAX_LISTEN_ADDR];
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	112 size_t listensockcount = 0;
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	113 FILE *pidfile = NULL;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	115 int childpipes[MAX_UNAUTH_CLIENTS];
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	116 char * preauth_addrs[MAX_UNAUTH_CLIENTS];
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	117
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118 int childsock;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 int childpipe[2];
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120
433 c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 425 diff changeset	121 /* Note: commonsetup() must happen before we daemon()ise. Otherwise
c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 425 diff changeset	122 daemon() will chdir("/"), and we won't be able to find local-dir
c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 425 diff changeset	123 hostkeys. */
379 b66a00272a90 Load hostkeys before daemon(), since daemon()'s chdir("/") will prevent us Matt Johnston <matt@ucc.asn.au> parents: 323 diff changeset	124 commonsetup();
b66a00272a90 Load hostkeys before daemon(), since daemon()'s chdir("/") will prevent us Matt Johnston <matt@ucc.asn.au> parents: 323 diff changeset	125
447 278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	126 /* sockets to identify pre-authenticated clients */
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	127 for (i = 0; i < MAX_UNAUTH_CLIENTS; i++) {
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	128 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	129 }
539 07a58e4da1ac use memset() rather than bzero() Matt Johnston <matt@ucc.asn.au> parents: 476 diff changeset	130 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	131
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	132 /* 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	133 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	134 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	135 {
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	136 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	137 }
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	138
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	139 /* fork */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 if (svr_opts.forkbg) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141 int closefds = 0;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 #ifndef DEBUG_TRACE
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 if (!svr_opts.usingsyslog) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 closefds = 1;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146 #endif
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147 if (daemon(0, closefds) < 0) {
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	148 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	149 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 /* 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	153 if (svr_opts.forkbg) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 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	155 } else {
445 edbee0596531 "backgrounding" is more user-understandable than "forking" Matt Johnston <matt@ucc.asn.au> parents: 435 diff changeset	156 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	157 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 /* 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	160 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	161 if (pidfile) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 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	163 fclose(pidfile);
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 /* incoming connection select loop */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 for(;;) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	168
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 FD_ZERO(&fds);
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 /* listening sockets */
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	172 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	173 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	174 }
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 /* pre-authentication clients */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 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	178 if (childpipes[i] >= 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	179 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	180 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	181 }
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
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 447 diff changeset	184 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	185
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186 if (exitflag) {
323 3bfbe95f9a14 Add -P pidfile patch from Swen Schillig Matt Johnston <matt@ucc.asn.au> parents: 298 diff changeset	187 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	188 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	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 if (val == 0) {
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 447 diff changeset	192 /* 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	193 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 }
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 if (val < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197 if (errno == EINTR) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 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	201 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	203 /* 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	204 * 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	205 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	206 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	207 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	208 childpipes[i] = -1;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	209 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	210 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	213 /* 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	214 for (i = 0; i < listensockcount; i++) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	215 size_t num_unauthed_for_addr = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	216 size_t num_unauthed_total = 0;
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	217 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	218 pid_t fork_ret = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	219 size_t conn_idx = 0;
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	220 struct sockaddr_storage remoteaddr;
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	221 socklen_t remoteaddrlen;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	222
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223 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	224 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	226 remoteaddrlen = sizeof(remoteaddr);
63 dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	227 childsock = accept(listensocks[i],
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	228 (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	229
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230 if (childsock < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	231 /* accept failed */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	235 /* Limit the number of unauthenticated connections per IP */
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	236 getaddrstring(&remoteaddr, &remote_host, NULL, 0);
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	237
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	238 num_unauthed_for_addr = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	239 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	240 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	241 if (childpipes[j] >= 0) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	242 num_unauthed_total++;
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	243 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	244 num_unauthed_for_addr++;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	245 }
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	246 } else {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	247 /* a free slot */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	248 conn_idx = j;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	249 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	250 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	251
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	252 if (num_unauthed_total >= MAX_UNAUTH_CLIENTS
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	253 \|\| 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	254 goto out;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	255 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256
687 167fdc091c05 Improve RNG seeding. Matt Johnston <matt@ucc.asn.au> parents: 658 diff changeset	257 seedrandom();
167fdc091c05 Improve RNG seeding. Matt Johnston <matt@ucc.asn.au> parents: 658 diff changeset	258
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259 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	260 TRACE(("error creating child pipe"))
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	261 goto out;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	262 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	263
476 df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review. Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	264 #ifdef DEBUG_NOFORK
df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review. Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	265 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	266 #else
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	267 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	268 #endif
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	269 if (fork_ret < 0) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	270 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	271 goto out;
687 167fdc091c05 Improve RNG seeding. Matt Johnston <matt@ucc.asn.au> parents: 658 diff changeset	272 }
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	273
723 0fd32a552ea5 Fix a few compile warnings Matt Johnston <matt@ucc.asn.au> parents: 687 diff changeset	274 addrandom((void*)&fork_ret, sizeof(fork_ret));
687 167fdc091c05 Improve RNG seeding. Matt Johnston <matt@ucc.asn.au> parents: 658 diff changeset	275
167fdc091c05 Improve RNG seeding. Matt Johnston <matt@ucc.asn.au> parents: 658 diff changeset	276 if (fork_ret > 0) {
277 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]);
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	281 preauth_addrs[conn_idx] = remote_host;
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	282 remote_host = NULL;
277 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 #ifdef DEBUG_FORKGPROF
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	288 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	289 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	290 #endif /* DEBUG_FORKGPROF */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	292 getaddrstring(&remoteaddr, NULL, &remote_port, 0);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	293 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	294 m_free(remote_host);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	295 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	296
476 df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review. Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	297 #ifndef DEBUG_NOFORK
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 if (setsid() < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299 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	300 }
476 df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review. Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	301 #endif
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	302
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	303 /* make sure we close sockets */
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	304 for (i = 0; i < listensockcount; i++) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	305 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	306 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	307
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	308 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	309
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	310 /* start the session */
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	311 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	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);
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	319 if (remote_host) {
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	320 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	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;
658 d4d0279710b9 - Initialise sa_mask properly Matt Johnston <matt@ucc.asn.au> parents: 656 diff changeset	378 sigemptyset(&sa_chld.sa_mask);
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	379 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	380 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	381 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	382 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	383 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	384 }
113 775c6cbfe995 Load the hostkeys for inetd too - oops Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	385
775c6cbfe995 Load the hostkeys for inetd too - oops Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	386 /* 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	387 * 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	388 loadhostkeys();
272 3be7ae2e8dfa Only read /dev/random once when the program starts Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	389
3be7ae2e8dfa Only read /dev/random once when the program starts Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	390 seedrandom();
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	391 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	392
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	393 /* 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	394 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	395
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	396 unsigned int i;
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	397 char* errstring = NULL;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	398 size_t sockpos = 0;
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	399 int nsock;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	400
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	401 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	402
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	403 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	404
434 0aaaf68e97dc Add -p [address:]port option for binding to addresses, patch from Matt Johnston <matt@ucc.asn.au> parents: 290 diff changeset	405 TRACE(("listening on '%s:%s'", svr_opts.addresses[i], 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	406
434 0aaaf68e97dc Add -p [address:]port option for binding to addresses, patch from Matt Johnston <matt@ucc.asn.au> parents: 290 diff changeset	407 nsock = dropbear_listen(svr_opts.addresses[i], svr_opts.ports[i], &sock[sockpos],
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	408 sockcount - sockpos,
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	409 &errstring, maxfd);
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	410
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	411 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	412 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	413 svr_opts.ports[i], errstring);
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	414 m_free(errstring);
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	415 continue;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	417
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	418 sockpos += nsock;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	420 }
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	421 return sockpos;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	422 }

Mercurial > dropbear

annotate svr-main.c @ 735:73b6e5d8801b