dropbear: svr-main.c annotate

annotate svr-main.c @ 1903:9382271da9ef

Only set soft core limit not hard limit Otherwise child shells can't enable coredumps if desired. Fixes #145 on github

author	Matt Johnston <matt@ucc.asn.au>
date	Thu, 24 Mar 2022 14:18:45 +0800
parents	2c9d635a1c04
children

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"
858 220f55d540ae rename random.h to dbrandom.h since some OSes have a system random.h Matt Johnston <matt@ucc.asn.au> parents: 795 diff changeset	31 #include "dbrandom.h"
795 7f604f9b3756 ecdsa is working Matt Johnston <matt@ucc.asn.au> parents: 723 diff changeset	32 #include "crypto_desc.h"
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	34 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	35 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	36 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	37 static void sigintterm_handler(int fish);
1276 9169e4e7cbee fix empty C prototypes Francois Perrad <francois.perrad@gadz.org> parents: 1275 diff changeset	38 static void main_inetd(void);
1870 0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	39 static void main_noinetd(int argc, char ** argv, const char* multipath);
1276 9169e4e7cbee fix empty C prototypes Francois Perrad <francois.perrad@gadz.org> parents: 1275 diff changeset	40 static void commonsetup(void);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	41
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	42 #if defined(DBMULTI_dropbear) \|\| !DROPBEAR_MULTI
750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	43 #if defined(DBMULTI_dropbear) && DROPBEAR_MULTI
1870 0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	44 int dropbear_main(int argc, char ** argv, const char* multipath)
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 #else
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 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	47 #endif
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48 {
1870 0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	49 #if !DROPBEAR_MULTI
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	50 const char* multipath = NULL;
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	51 #endif
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	52
71 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
425 1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 379 diff changeset	56 disallow_core();
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 379 diff changeset	57
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	58 if (argc < 1) {
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	59 dropbear_exit("Bad argc");
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	60 }
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	61
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	62 /* get commandline options */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	63 svr_getopts(argc, argv);
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	64
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1495 diff changeset	65 #if INETD_MODE
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	66 /* service program mode */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	67 if (svr_opts.inetdmode) {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	68 main_inetd();
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 }
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
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	73 #if DROPBEAR_DO_REEXEC
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	74 if (svr_opts.reexec_child) {
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	75 #ifdef PR_SET_NAME
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	76 /* Fix the "Name:" in /proc/pid/status, otherwise it's
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	77 a FD number from fexecve.
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	78 Failure doesn't really matter, it's mostly aesthetic */
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	79 prctl(PR_SET_NAME, basename(argv[0]), 0, 0);
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	80 #endif
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	81 main_inetd();
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	82 /* notreached */
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	83 }
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	84 #endif
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	85
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1495 diff changeset	86 #if NON_INETD_MODE
1870 0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	87 main_noinetd(argc, argv, multipath);
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	88 /* notreached */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	89 #endif
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 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	92 return -1;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	93 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	94 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	95
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	96 #if INETD_MODE \|\| DROPBEAR_DO_REEXEC
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	97 static void main_inetd() {
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	98 char host, port = NULL;
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	99
1716 6ea18ca8fc03 Delay seedrandom until connections Matt Johnston <matt@ucc.asn.au> parents: 1706 diff changeset	100 /* Set up handlers, syslog */
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	101 commonsetup();
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	102
1716 6ea18ca8fc03 Delay seedrandom until connections Matt Johnston <matt@ucc.asn.au> parents: 1706 diff changeset	103 seedrandom();
6ea18ca8fc03 Delay seedrandom until connections Matt Johnston <matt@ucc.asn.au> parents: 1706 diff changeset	104
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	105 if (!svr_opts.reexec_child) {
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	106 /* In case our inetd was lax in logging source addresses */
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	107 get_socket_address(0, NULL, NULL, &host, &port, 0);
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	108 dropbear_log(LOG_INFO, "Child connection from %s:%s", host, port);
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	109 m_free(host);
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	110 m_free(port);
1498 ee7153a05ffc disallow inetd -v Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	111
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	112 /* Don't check the return value - it may just fail since inetd has
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	113 * already done setsid() after forking (xinetd on Darwin appears to do
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	114 * this */
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	115 setsid();
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	116 }
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	117
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	118 /* Start service program
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	119 * -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	120 * mattering. */
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	121 svr_session(0, -1);
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	122
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	123 /* notreached */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	124 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	125 #endif /* INETD_MODE */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	126
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1495 diff changeset	127 #if NON_INETD_MODE
1870 0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	128 static void main_noinetd(int argc, char ** argv, const char* multipath) {
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 fd_set fds;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130 unsigned int i, j;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131 int val;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 int maxsock = -1;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133 int listensocks[MAX_LISTEN_ADDR];
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	134 size_t listensockcount = 0;
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	135 FILE *pidfile = NULL;
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	136 int execfd = -1;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	138 int childpipes[MAX_UNAUTH_CLIENTS];
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	139 char * preauth_addrs[MAX_UNAUTH_CLIENTS];
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	140
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141 int childsock;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 int childpipe[2];
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	144 (void)argc;
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	145 (void)argv;
1873 2c9d635a1c04 Avoid unused argument warning when reexec is unused Matt Johnston <matt@ucc.asn.au> parents: 1870 diff changeset	146 (void)multipath;
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	147
433 c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 425 diff changeset	148 /* 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	149 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	150 hostkeys. */
379 b66a00272a90 Load hostkeys before daemon(), since daemon()'s chdir("/") will prevent us Matt Johnston <matt@ucc.asn.au> parents: 323 diff changeset	151 commonsetup();
b66a00272a90 Load hostkeys before daemon(), since daemon()'s chdir("/") will prevent us Matt Johnston <matt@ucc.asn.au> parents: 323 diff changeset	152
447 278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	153 /* 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	154 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	155 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	156 }
539 07a58e4da1ac use memset() rather than bzero() Matt Johnston <matt@ucc.asn.au> parents: 476 diff changeset	157 memset(preauth_addrs, 0x0, sizeof(preauth_addrs));
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	158
447 278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	159 /* 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	160 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	161 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	162 {
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	163 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	164 }
278805938dcf Patch from Nicolai Ehemann to try binding before going to the background, Matt Johnston <matt@ucc.asn.au> parents: 445 diff changeset	165
871 aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	166 for (i = 0; i < listensockcount; i++) {
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	167 FD_SET(listensocks[i], &fds);
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	168 }
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	169
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	170 #if DROPBEAR_DO_REEXEC
1870 0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	171 if (multipath) {
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	172 execfd = open(multipath, O_CLOEXEC\|O_RDONLY);
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	173 } else {
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	174 execfd = open(argv[0], O_CLOEXEC\|O_RDONLY);
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	175 }
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	176 if (execfd < 0) {
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	177 /* Just fallback to straight fork */
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	178 TRACE(("Couldn't open own binary %s, disabling re-exec: %s", argv[0], strerror(errno)))
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	179 }
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	180 #endif
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	181
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	182 /* fork */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	183 if (svr_opts.forkbg) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184 int closefds = 0;
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	185 #if !DEBUG_TRACE
1210 64a50eac1030 Moved usingsyslog from svr_runopts to runopts. Konstantin Tokarev <ktokarev@smartlabs.tv> parents: 1084 diff changeset	186 if (!opts.usingsyslog) {
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187 closefds = 1;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189 #endif
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190 if (daemon(0, closefds) < 0) {
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	191 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	192 }
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
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195 /* 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	196 if (svr_opts.forkbg) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197 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	198 } else {
445 edbee0596531 "backgrounding" is more user-understandable than "forking" Matt Johnston <matt@ucc.asn.au> parents: 435 diff changeset	199 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	200 }
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 /* 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	203 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	204 if (pidfile) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 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	206 fclose(pidfile);
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
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 /* incoming connection select loop */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	210 for(;;) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211
1596 60fceff95858 workaround memory sanitizer FD_ZERO false positives Matt Johnston <matt@ucc.asn.au> parents: 1508 diff changeset	212 DROPBEAR_FD_ZERO(&fds);
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	213
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	214 /* listening sockets */
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	215 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	216 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	217 }
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 /* pre-authentication clients */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220 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	221 if (childpipes[i] >= 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222 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	223 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	224 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 447 diff changeset	227 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	228
1495 0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1295 diff changeset	229 if (ses.exitflag) {
323 3bfbe95f9a14 Add -P pidfile patch from Swen Schillig Matt Johnston <matt@ucc.asn.au> parents: 298 diff changeset	230 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	231 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	232 }
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	233
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234 if (val == 0) {
454 7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient Matt Johnston <matt@ucc.asn.au> parents: 447 diff changeset	235 /* 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	236 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	237 }
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 (val < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240 if (errno == EINTR) {
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 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	244 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	245
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	246 /* 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	247 * 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	248 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	249 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	250 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	251 childpipes[i] = -1;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	252 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	253 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	254 }
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 /* 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	257 for (i = 0; i < listensockcount; i++) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	258 size_t num_unauthed_for_addr = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	259 size_t num_unauthed_total = 0;
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	260 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	261 pid_t fork_ret = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	262 size_t conn_idx = 0;
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	263 struct sockaddr_storage remoteaddr;
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	264 socklen_t remoteaddrlen;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	265
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 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	267 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	268
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	269 remoteaddrlen = sizeof(remoteaddr);
63 dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	270 childsock = accept(listensocks[i],
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	271 (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	272
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	273 if (childsock < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	274 /* accept failed */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	275 continue;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	276 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	277
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	278 /* Limit the number of unauthenticated connections per IP */
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	279 getaddrstring(&remoteaddr, &remote_host, NULL, 0);
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	280
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	281 num_unauthed_for_addr = 0;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	282 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	283 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	284 if (childpipes[j] >= 0) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	285 num_unauthed_total++;
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	286 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	287 num_unauthed_for_addr++;
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	288 }
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	289 } else {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	290 /* a free slot */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	291 conn_idx = j;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	295 if (num_unauthed_total >= MAX_UNAUTH_CLIENTS
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	296 \|\| 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	297 goto out;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299
687 167fdc091c05 Improve RNG seeding. Matt Johnston <matt@ucc.asn.au> parents: 658 diff changeset	300 seedrandom();
167fdc091c05 Improve RNG seeding. Matt Johnston <matt@ucc.asn.au> parents: 658 diff changeset	301
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	302 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	303 TRACE(("error creating child pipe"))
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	304 goto out;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	305 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	306
1677 e05c0e394f1d Make DEBUG_NOFORK a #if not #ifdef Matt Johnston <matt@ucc.asn.au> parents: 1596 diff changeset	307 #if DEBUG_NOFORK
476 df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review. Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	308 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	309 #else
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	310 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	311 #endif
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	312 if (fork_ret < 0) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	313 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	314 goto out;
687 167fdc091c05 Improve RNG seeding. Matt Johnston <matt@ucc.asn.au> parents: 658 diff changeset	315 }
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	316
723 0fd32a552ea5 Fix a few compile warnings Matt Johnston <matt@ucc.asn.au> parents: 687 diff changeset	317 addrandom((void*)&fork_ret, sizeof(fork_ret));
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	318
687 167fdc091c05 Improve RNG seeding. Matt Johnston <matt@ucc.asn.au> parents: 658 diff changeset	319 if (fork_ret > 0) {
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	320
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	321 /* parent */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	322 childpipes[conn_idx] = childpipe[0];
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	323 m_close(childpipe[1]);
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	324 preauth_addrs[conn_idx] = remote_host;
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	325 remote_host = NULL;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	326
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	327 } else {
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	328
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	329 /* child */
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	330 getaddrstring(&remoteaddr, NULL, &remote_port, 0);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	331 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	332 m_free(remote_host);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	333 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	334
476 df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review. Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	335 #ifndef DEBUG_NOFORK
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	336 if (setsid() < 0) {
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	337 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	338 }
476 df7f7da7f6e4 - Rework pubkey options to be more careful about buffer lengths. Needs review. Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	339 #endif
30 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 /* make sure we close sockets */
1270 6d00eca524fe rename loop variable Francois Perrad <francois.perrad@gadz.org> parents: 1250 diff changeset	342 for (j = 0; j < listensockcount; j++) {
6d00eca524fe rename loop variable Francois Perrad <francois.perrad@gadz.org> parents: 1250 diff changeset	343 m_close(listensocks[j]);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	344 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	345
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	346 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	347
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	348 if (execfd >= 0) {
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	349 #if DROPBEAR_DO_REEXEC
1870 0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	350 /* Add "-2" to the args and re-execute ourself. */
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	351 char *new_argv = m_malloc(sizeof(char) * (argc+3));
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	352 int pos0 = 0, new_argc = argc+1;
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	353
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	354 /* We need to specially handle "dropbearmulti dropbear". */
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	355 if (multipath) {
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	356 new_argv[0] = (char*)multipath;
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	357 pos0 = 1;
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	358 new_argc++;
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	359 }
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	360
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	361 memcpy(&new_argv[pos0], argv, sizeof(char) argc);
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	362 new_argv[new_argc-1] = "-2";
0dcc5b0d93fa Make re-exec work with "dropbearmulti dropbear" Matt Johnston <matt@ucc.asn.au> parents: 1866 diff changeset	363 new_argv[new_argc] = NULL;
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	364
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	365 if ((dup2(childsock, STDIN_FILENO) < 0)) {
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	366 dropbear_exit("dup2 failed: %s", strerror(errno));
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	367 }
1866 adfcdfb161a4 Fix missing NULL terminator for re-exec Matt Johnston <matt@ucc.asn.au> parents: 1861 diff changeset	368 if (fcntl(childsock, F_SETFD, FD_CLOEXEC) < 0) {
adfcdfb161a4 Fix missing NULL terminator for re-exec Matt Johnston <matt@ucc.asn.au> parents: 1861 diff changeset	369 TRACE(("cloexec for childsock %d failed: %s", childsock, strerror(errno)))
adfcdfb161a4 Fix missing NULL terminator for re-exec Matt Johnston <matt@ucc.asn.au> parents: 1861 diff changeset	370 }
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	371 /* Re-execute ourself */
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	372 fexecve(execfd, new_argv, environ);
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	373 /* Not reached on success */
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	374
1866 adfcdfb161a4 Fix missing NULL terminator for re-exec Matt Johnston <matt@ucc.asn.au> parents: 1861 diff changeset	375 /* Fall back on plain fork otherwise.
adfcdfb161a4 Fix missing NULL terminator for re-exec Matt Johnston <matt@ucc.asn.au> parents: 1861 diff changeset	376 * To be removed in future once re-exec has been well tested */
adfcdfb161a4 Fix missing NULL terminator for re-exec Matt Johnston <matt@ucc.asn.au> parents: 1861 diff changeset	377 dropbear_log(LOG_WARNING, "fexecve failed, disabling re-exec: %s", strerror(errno));
adfcdfb161a4 Fix missing NULL terminator for re-exec Matt Johnston <matt@ucc.asn.au> parents: 1861 diff changeset	378 m_close(STDIN_FILENO);
1861 2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	379 m_free(new_argv);
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	380 #endif /* DROPBEAR_DO_REEXEC */
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	381 }
2b3a8026a6ce Add re-exec for server Matt Johnston <matt@ucc.asn.au> parents: 1716 diff changeset	382
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	383 /* start the session */
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	384 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	385 /* don't return */
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	386 dropbear_assert(0);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	387 }
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	388
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	389 out:
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	390 /* 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	391 m_close(childsock);
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	392 if (remote_host) {
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 539 diff changeset	393 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	394 }
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 } /* for(;;) loop */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	397
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	398 /* don't reach here */
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	399 }
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	400 #endif /* NON_INETD_MODE */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 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
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	403 /* catch + reap zombie children */
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 101 diff changeset	404 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	405 struct sigaction sa_chld;
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	406
893 860e3522f8fc - Save errno in signal handlers Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	407 const int saved_errno = errno;
860e3522f8fc - Save errno in signal handlers Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	408
1271 26622eee1e8b Suspicious use of ; Francois Perrad <francois.perrad@gadz.org> parents: 1270 diff changeset	409 while(waitpid(-1, NULL, WNOHANG) > 0) {}
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	410
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	411 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	412 sa_chld.sa_flags = SA_NOCLDSTOP;
1001 a48561559584 Initialise sa_mask Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	413 sigemptyset(&sa_chld.sa_mask);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	414 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	415 dropbear_exit("signal() error");
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 }
893 860e3522f8fc - Save errno in signal handlers Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	417 errno = saved_errno;
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
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	420 /* catch any segvs */
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 101 diff changeset	421 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	422 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	423 "this as a bug to the developer\n");
893 860e3522f8fc - Save errno in signal handlers Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	424 _exit(EXIT_FAILURE);
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	425 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	426
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	427 /* catch ctrl-c or sigterm */
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 101 diff changeset	428 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	429
1495 0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1295 diff changeset	430 ses.exitflag = 1;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	431 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	432
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	433 /* 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	434 static void commonsetup() {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	435
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	436 struct sigaction sa_chld;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	437 #ifndef DISABLE_SYSLOG
1210 64a50eac1030 Moved usingsyslog from svr_runopts to runopts. Konstantin Tokarev <ktokarev@smartlabs.tv> parents: 1084 diff changeset	438 if (opts.usingsyslog) {
1211 6ecc133fb2ee Allow setting syslog identifier via startsyslog(). Konstantin Tokarev <ktokarev@smartlabs.tv> parents: 1210 diff changeset	439 startsyslog(PROGNAME);
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	440 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	441 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	442
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	443 /* set up cleanup handler */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	444 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	445 #ifndef DEBUG_VALGRIND
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	446 signal(SIGTERM, sigintterm_handler) == SIG_ERR \|\|
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	447 #endif
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	448 signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	449 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	450 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	451
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	452 /* catch and reap zombie children */
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	453 sa_chld.sa_handler = sigchld_handler;
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	454 sa_chld.sa_flags = SA_NOCLDSTOP;
658 d4d0279710b9 - Initialise sa_mask properly Matt Johnston <matt@ucc.asn.au> parents: 656 diff changeset	455 sigemptyset(&sa_chld.sa_mask);
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	456 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	457 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	458 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	459 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	460 dropbear_exit("signal() error");
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	461 }
113 775c6cbfe995 Load the hostkeys for inetd too - oops Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	462
795 7f604f9b3756 ecdsa is working Matt Johnston <matt@ucc.asn.au> parents: 723 diff changeset	463 crypto_init();
7f604f9b3756 ecdsa is working Matt Johnston <matt@ucc.asn.au> parents: 723 diff changeset	464
113 775c6cbfe995 Load the hostkeys for inetd too - oops Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	465 /* 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	466 * otherwise we might end up blatting error messages to the socket */
795 7f604f9b3756 ecdsa is working Matt Johnston <matt@ucc.asn.au> parents: 723 diff changeset	467 load_all_hostkeys();
71 ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	468 }
ac96bc733e71 adding inetd mode back from 0.43 Matt Johnston <matt@ucc.asn.au> parents: 63 diff changeset	469
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	470 /* Set up listening sockets for all the requested ports */
1023 a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	471 static size_t listensockets(int socks, size_t sockcount, int maxfd) {
a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	472
a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	473 unsigned int i, n;
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	474 char* errstring = NULL;
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	475 size_t sockpos = 0;
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	476 int nsock;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	477
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 893 diff changeset	478 TRACE(("listensockets: %d to try", svr_opts.portcount))
101 72dc22f56858 Change the way we load keys/ports so we don't print error messages into our Matt Johnston <matt@ucc.asn.au> parents: 71 diff changeset	479
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	480 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	481
434 0aaaf68e97dc Add -p [address:]port option for binding to addresses, patch from Matt Johnston <matt@ucc.asn.au> parents: 290 diff changeset	482 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	483
1023 a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	484 nsock = dropbear_listen(svr_opts.addresses[i], svr_opts.ports[i], &socks[sockpos],
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	485 sockcount - sockpos,
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	486 &errstring, maxfd);
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	487
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	488 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	489 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	490 svr_opts.ports[i], errstring);
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	491 m_free(errstring);
20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	492 continue;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	493 }
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	494
1023 a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	495 for (n = 0; n < (unsigned int)nsock; n++) {
a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	496 int sock = socks[sockpos + n];
a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	497 set_sock_priority(sock, DROPBEAR_PRIO_LOWDELAY);
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	498 #if DROPBEAR_SERVER_TCP_FAST_OPEN
1023 a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	499 set_listen_fast_open(sock);
a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	500 #endif
a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	501 }
a00303a7d247 tcp fastopen for the server Matt Johnston <matt@ucc.asn.au> parents: 1001 diff changeset	502
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	503 sockpos += nsock;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	504
223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	505 }
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 30 diff changeset	506 return sockpos;
30 223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style Matt Johnston <matt@ucc.asn.au> parents: diff changeset	507 }

Mercurial > dropbear

annotate svr-main.c @ 1903:9382271da9ef