dropbear: cli-session.c annotate

annotate cli-session.c @ 982:fd2e8bbb0333

Make sure hostkeys are flushed to disk to avoid empty files if the power fails. Based on patch from Peter Korsgaard

author	Matt Johnston <matt@ucc.asn.au>
date	Sat, 08 Nov 2014 22:15:16 +0800
parents	0bb16232e7c4
children	73ea0dce9a57 02baa0b334e8 38d2f6b2d1b8

rev	line source
74 e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	1 /*
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	2 * Dropbear SSH
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	3 *
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	4 * Copyright (c) 2002,2003 Matt Johnston
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	5 * Copyright (c) 2004 by Mihnea Stoenescu
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	6 * All rights reserved.
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	7 *
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	8 * Permission is hereby granted, free of charge, to any person obtaining a copy
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	9 * of this software and associated documentation files (the "Software"), to deal
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	10 * in the Software without restriction, including without limitation the rights
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	12 * copies of the Software, and to permit persons to whom the Software is
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	13 * furnished to do so, subject to the following conditions:
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	14 *
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	15 * The above copyright notice and this permission notice shall be included in
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	16 * all copies or substantial portions of the Software.
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	17 *
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	24 * SOFTWARE. */
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	25
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 #include "includes.h"
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 #include "session.h"
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 #include "dbutil.h"
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 #include "kex.h"
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 #include "ssh.h"
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 #include "packet.h"
64 efb5e0b335cf TCP forwarding works. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	32 #include "tcpfwd.h"
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 #include "channel.h"
858 220f55d540ae rename random.h to dbrandom.h since some OSes have a system random.h Matt Johnston <matt@ucc.asn.au> parents: 857 diff changeset	34 #include "dbrandom.h"
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	35 #include "service.h"
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	36 #include "runopts.h"
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	37 #include "chansession.h"
547 cf376c696dfc Make it compile, update for changes in channel structure. Matt Johnston <matt@ucc.asn.au> parents: 546 diff changeset	38 #include "agentfwd.h"
766 d1575fdc29a6 start on ecdsa keys Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	39 #include "crypto_desc.h"
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	40
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	41 static void cli_remoteclosed();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	42 static void cli_sessionloop();
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	43 static void cli_session_init();
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	44 static void cli_finished();
727 00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	45 static void recv_msg_service_accept(void);
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	46 static void cli_session_cleanup(void);
937 4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	47 static void recv_msg_global_request_cli(void);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 struct clientsession cli_ses; /* GLOBAL */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50
45 9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	51 /* Sorted in decreasing frequency will be more efficient - data and window
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	52 * should be first */
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	53 static const packettype cli_packettypes[] = {
74 e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	54 /* TYPE, FUNCTION */
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	55 {SSH_MSG_CHANNEL_DATA, recv_msg_channel_data},
107 d3eb1fa8484e Nasty. Matt Johnston <matt@ucc.asn.au> parents: 100 diff changeset	56 {SSH_MSG_CHANNEL_EXTENDED_DATA, recv_msg_channel_extended_data},
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	57 {SSH_MSG_CHANNEL_WINDOW_ADJUST, recv_msg_channel_window_adjust},
45 9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	58 {SSH_MSG_USERAUTH_FAILURE, recv_msg_userauth_failure}, /* client */
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	59 {SSH_MSG_USERAUTH_SUCCESS, recv_msg_userauth_success}, /* client */
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	60 {SSH_MSG_KEXINIT, recv_msg_kexinit},
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	61 {SSH_MSG_KEXDH_REPLY, recv_msg_kexdh_reply}, /* client */
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	62 {SSH_MSG_NEWKEYS, recv_msg_newkeys},
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	63 {SSH_MSG_SERVICE_ACCEPT, recv_msg_service_accept}, /* client */
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	64 {SSH_MSG_CHANNEL_REQUEST, recv_msg_channel_request},
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	65 {SSH_MSG_CHANNEL_OPEN, recv_msg_channel_open},
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66 {SSH_MSG_CHANNEL_EOF, recv_msg_channel_eof},
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	67 {SSH_MSG_CHANNEL_CLOSE, recv_msg_channel_close},
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	68 {SSH_MSG_CHANNEL_OPEN_CONFIRMATION, recv_msg_channel_open_confirmation},
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	69 {SSH_MSG_CHANNEL_OPEN_FAILURE, recv_msg_channel_open_failure},
45 9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	70 {SSH_MSG_USERAUTH_BANNER, recv_msg_userauth_banner}, /* client */
249 efbaf6b03837 added keyboard-interactive client support Matt Johnston <matt@ucc.asn.au> parents: 215 diff changeset	71 {SSH_MSG_USERAUTH_SPECIFIC_60, recv_msg_userauth_specific_60}, /* client */
937 4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	72 {SSH_MSG_GLOBAL_REQUEST, recv_msg_global_request_cli},
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	73 {SSH_MSG_CHANNEL_SUCCESS, ignore_recv_response},
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	74 {SSH_MSG_CHANNEL_FAILURE, ignore_recv_response},
505 805e557fdff7 Report errors if a remote request fails Matt Johnston <matt@ucc.asn.au> parents: 486 diff changeset	75 #ifdef ENABLE_CLI_REMOTETCPFWD
805e557fdff7 Report errors if a remote request fails Matt Johnston <matt@ucc.asn.au> parents: 486 diff changeset	76 {SSH_MSG_REQUEST_SUCCESS, cli_recv_msg_request_success}, /* client */
805e557fdff7 Report errors if a remote request fails Matt Johnston <matt@ucc.asn.au> parents: 486 diff changeset	77 {SSH_MSG_REQUEST_FAILURE, cli_recv_msg_request_failure}, /* client */
968 f7f6c15b0ec3 Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses Matt Johnston <matt@ucc.asn.au> parents: 937 diff changeset	78 #else
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	79 /* For keepalive */
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	80 {SSH_MSG_REQUEST_SUCCESS, ignore_recv_response},
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	81 {SSH_MSG_REQUEST_FAILURE, ignore_recv_response},
505 805e557fdff7 Report errors if a remote request fails Matt Johnston <matt@ucc.asn.au> parents: 486 diff changeset	82 #endif
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	83 {0, 0} /* End */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	84 };
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	85
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	86 static const struct ChanType *cli_chantypes[] = {
64 efb5e0b335cf TCP forwarding works. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	87 #ifdef ENABLE_CLI_REMOTETCPFWD
efb5e0b335cf TCP forwarding works. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	88 &cli_chan_tcpremote,
efb5e0b335cf TCP forwarding works. Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	89 #endif
225 ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 215 diff changeset	90 #ifdef ENABLE_CLI_AGENTFWD
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 215 diff changeset	91 &cli_chan_agent,
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 215 diff changeset	92 #endif
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93 NULL /* Null termination */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	94 };
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	95
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 560 diff changeset	96 void cli_session(int sock_in, int sock_out) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 560 diff changeset	98 common_session_init(sock_in, sock_out);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	99
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100 chaninitialise(cli_chantypes);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	102 /* Set up cli_ses vars */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	103 cli_session_init();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 /* Ready to go */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106 sessinitdone = 1;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	107
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108 /* Exchange identification */
726 78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	109 send_session_identification();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111 send_msg_kexinit();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113 session_loop(cli_sessionloop);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	115 /* Not reached */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	116
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	117 }
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	119 #ifdef USE_KEX_FIRST_FOLLOWS
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	120 static void cli_send_kex_first_guess() {
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	121 send_msg_kexdh_init();
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	122 }
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	123 #endif
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	124
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	125 static void cli_session_init() {
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	126
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	127 cli_ses.state = STATE_NOTHING;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	128 cli_ses.kex_state = KEX_NOTHING;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	129
39 0883c0906870 tty raw mode support works mostly Matt Johnston <matt@ucc.asn.au> parents: 37 diff changeset	130 cli_ses.tty_raw_mode = 0;
41 18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	131 cli_ses.winchange = 0;
39 0883c0906870 tty raw mode support works mostly Matt Johnston <matt@ucc.asn.au> parents: 37 diff changeset	132
175 2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	133 /* We store std{in,out,err}'s flags, so we can set them back on exit
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	134 * (otherwise busybox's ash isn't happy */
99 0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it Matt Johnston <matt@ucc.asn.au> parents: 74 diff changeset	135 cli_ses.stdincopy = dup(STDIN_FILENO);
0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it Matt Johnston <matt@ucc.asn.au> parents: 74 diff changeset	136 cli_ses.stdinflags = fcntl(STDIN_FILENO, F_GETFL, 0);
175 2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	137 cli_ses.stdoutcopy = dup(STDOUT_FILENO);
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	138 cli_ses.stdoutflags = fcntl(STDOUT_FILENO, F_GETFL, 0);
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	139 cli_ses.stderrcopy = dup(STDERR_FILENO);
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	140 cli_ses.stderrflags = fcntl(STDERR_FILENO, F_GETFL, 0);
99 0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it Matt Johnston <matt@ucc.asn.au> parents: 74 diff changeset	141
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	142 cli_ses.retval = EXIT_SUCCESS; /* Assume it's clean if we don't get a
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	143 specific exit status */
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	144
47 4b53a43f0082 - client pubkey auth works Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	145 /* Auth */
215 aad4b3f58556 rename PubkeyList to SignKeyList for clarity Matt Johnston <matt@ucc.asn.au> parents: 175 diff changeset	146 cli_ses.lastprivkey = NULL;
136 fb7147e2fb04 - Fixed a couple of compile warnings Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	147 cli_ses.lastauthtype = 0;
47 4b53a43f0082 - client pubkey auth works Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	148
686 983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	149 #ifdef DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	150 cli_ses.cipher_none_after_auth = get_algo_usable(sshciphers, "none");
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	151 set_algo_usable(sshciphers, "none", 0);
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	152 #else
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	153 cli_ses.cipher_none_after_auth = 0;
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	154 #endif
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	155
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	156 /* For printing "remote host closed" for the user */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	157 ses.remoteclosed = cli_remoteclosed;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	158
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	159 ses.extra_session_cleanup = cli_session_cleanup;
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	160
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	161 /* packet handlers */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	162 ses.packettypes = cli_packettypes;
35 0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 34 diff changeset	163
0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 34 diff changeset	164 ses.isserver = 0;
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	165
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	166 #ifdef USE_KEX_FIRST_FOLLOWS
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	167 ses.send_kex_first_guess = cli_send_kex_first_guess;
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	168 #endif
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	169
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171
727 00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	172 static void send_msg_service_request(char* servicename) {
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	173
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	174 TRACE(("enter send_msg_service_request: servicename='%s'", servicename))
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	175
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	176 CHECKCLEARTOWRITE();
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	177
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	178 buf_putbyte(ses.writepayload, SSH_MSG_SERVICE_REQUEST);
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	179 buf_putstring(ses.writepayload, servicename, strlen(servicename));
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	180
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	181 encrypt_packet();
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	182 TRACE(("leave send_msg_service_request"))
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	183 }
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	184
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	185 static void recv_msg_service_accept(void) {
857 c19acba28590 use oldstyle comments Matt Johnston <matt@ucc.asn.au> parents: 801 diff changeset	186 /* do nothing, if it failed then the server MUST have disconnected */
727 00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	187 }
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	188
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	189 /* This function drives the progress of the session - it initiates KEX,
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	190 * service, userauth and channel requests */
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	191 static void cli_sessionloop() {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 727 diff changeset	193 TRACE2(("enter cli_sessionloop"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	194
745 15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet Matt Johnston <matt@ucc.asn.au> parents: 743 diff changeset	195 if (ses.lastpacket == 0) {
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet Matt Johnston <matt@ucc.asn.au> parents: 743 diff changeset	196 TRACE2(("exit cli_sessionloop: no real packets yet"))
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet Matt Johnston <matt@ucc.asn.au> parents: 743 diff changeset	197 return;
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet Matt Johnston <matt@ucc.asn.au> parents: 743 diff changeset	198 }
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet Matt Johnston <matt@ucc.asn.au> parents: 743 diff changeset	199
34 e2a1eaa19f22 Client mostly works up to password auth Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	200 if (ses.lastpacket == SSH_MSG_KEXINIT && cli_ses.kex_state == KEX_NOTHING) {
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	201 /* We initiate the KEXDH. If DH wasn't the correct type, the KEXINIT
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	202 * negotiation would have failed. */
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	203 if (!ses.kexstate.our_first_follows_matches) {
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	204 send_msg_kexdh_init();
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	205 }
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	206 cli_ses.kex_state = KEXDH_INIT_SENT;
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 136 diff changeset	207 TRACE(("leave cli_sessionloop: done with KEXINIT_RCVD"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	208 return;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	209 }
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	210
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	211 /* A KEX has finished, so we should go back to our KEX_NOTHING state */
753 d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 750 diff changeset	212 if (cli_ses.kex_state != KEX_NOTHING && ses.kexstate.sentnewkeys) {
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	213 cli_ses.kex_state = KEX_NOTHING;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	214 }
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	215
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	216 /* We shouldn't do anything else if a KEX is in progress */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	217 if (cli_ses.kex_state != KEX_NOTHING) {
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 136 diff changeset	218 TRACE(("leave cli_sessionloop: kex_state != KEX_NOTHING"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	219 return;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	220 }
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	221
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	222 if (ses.kexstate.donefirstkex == 0) {
745 15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet Matt Johnston <matt@ucc.asn.au> parents: 743 diff changeset	223 /* We might reach here if we have partial packet reads or have
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet Matt Johnston <matt@ucc.asn.au> parents: 743 diff changeset	224 * received SSG_MSG_IGNORE etc. Just skip it */
753 d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 750 diff changeset	225 TRACE2(("donefirstkex false\n"))
34 e2a1eaa19f22 Client mostly works up to password auth Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	226 return;
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	227 }
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	228
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	229 switch (cli_ses.state) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	231 case STATE_NOTHING:
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	232 /* We've got the transport layer sorted, we now need to request
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	233 * userauth */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	234 send_msg_service_request(SSH_SERVICE_USERAUTH);
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	235 cli_auth_getmethods();
45 9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	236 cli_ses.state = USERAUTH_REQ_SENT;
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 136 diff changeset	237 TRACE(("leave cli_sessionloop: sent userauth methods req"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	238 return;
883 ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	239
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	240 case USERAUTH_REQ_SENT:
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	241 TRACE(("leave cli_sessionloop: waiting, req_sent"))
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	242 return;
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	243
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	244 case USERAUTH_FAIL_RCVD:
734 619b1ed837fd Be a bit more careful about when we want to use CLI_AUTH_IMMEDIATE Matt Johnston <matt@ucc.asn.au> parents: 733 diff changeset	245 if (cli_auth_try() == DROPBEAR_FAILURE) {
619b1ed837fd Be a bit more careful about when we want to use CLI_AUTH_IMMEDIATE Matt Johnston <matt@ucc.asn.au> parents: 733 diff changeset	246 dropbear_exit("No auth methods could be used.");
619b1ed837fd Be a bit more careful about when we want to use CLI_AUTH_IMMEDIATE Matt Johnston <matt@ucc.asn.au> parents: 733 diff changeset	247 }
45 9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	248 cli_ses.state = USERAUTH_REQ_SENT;
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 136 diff changeset	249 TRACE(("leave cli_sessionloop: cli_auth_try"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	250 return;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	251
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	252 case USERAUTH_SUCCESS_RCVD:
326 d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	253
686 983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	254 #ifdef DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	255 if (cli_ses.cipher_none_after_auth)
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	256 {
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	257 set_algo_usable(sshciphers, "none", 1);
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	258 send_msg_kexinit();
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	259 }
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	260 #endif
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	261
326 d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	262 if (cli_opts.backgrounded) {
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	263 int devnull;
433 c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 326 diff changeset	264 /* keeping stdin open steals input from the terminal and
c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 326 diff changeset	265 is confusing, though stdout/stderr could be useful. */
326 d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	266 devnull = open(_PATH_DEVNULL, O_RDONLY);
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	267 if (devnull < 0) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	268 dropbear_exit("Opening /dev/null: %d %s",
326 d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	269 errno, strerror(errno));
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	270 }
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	271 dup2(devnull, STDIN_FILENO);
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	272 if (daemon(0, 1) < 0) {
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	273 dropbear_exit("Backgrounding failed: %d %s",
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	274 errno, strerror(errno));
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	275 }
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	276 }
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	277
485 12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument. Matt Johnston <matt@ucc.asn.au> parents: 478 diff changeset	278 #ifdef ENABLE_CLI_NETCAT
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument. Matt Johnston <matt@ucc.asn.au> parents: 478 diff changeset	279 if (cli_opts.netcat_host) {
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument. Matt Johnston <matt@ucc.asn.au> parents: 478 diff changeset	280 cli_send_netcat_request();
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument. Matt Johnston <matt@ucc.asn.au> parents: 478 diff changeset	281 } else
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument. Matt Johnston <matt@ucc.asn.au> parents: 478 diff changeset	282 #endif
560 52d7301e46bd Agent forwarding works Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	283 if (!cli_opts.no_cmd) {
325 0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	284 cli_send_chansess_request();
0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	285 }
754 2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	286
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	287 #ifdef ENABLE_CLI_LOCALTCPFWD
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	288 setup_localtcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	289 #endif
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	290 #ifdef ENABLE_CLI_REMOTETCPFWD
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	291 setup_remotetcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	292 #endif
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	293
325 0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	294 TRACE(("leave cli_sessionloop: running"))
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	295 cli_ses.state = SESSION_RUNNING;
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	296 return;
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	297
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	298 case SESSION_RUNNING:
325 0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	299 if (ses.chancount < 1 && !cli_opts.no_cmd) {
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	300 cli_finished();
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	301 }
41 18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	302
18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	303 if (cli_ses.winchange) {
18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	304 cli_chansess_winchange();
18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	305 }
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	306 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	307
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	308 /* XXX more here needed */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	309
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	310
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	311 default:
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	312 break;
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	313 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	314
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 727 diff changeset	315 TRACE2(("leave cli_sessionloop: fell out"))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	316
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	317 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	318
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	319 static void cli_session_cleanup(void) {
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	320
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	321 if (!sessinitdone) {
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	322 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	323 }
99 0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it Matt Johnston <matt@ucc.asn.au> parents: 74 diff changeset	324
175 2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	325 /* Set std{in,out,err} back to non-blocking - busybox ash dies nastily if
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	326 * we don't revert the flags */
100 c72f5c10125d oops, the fcntl() was commented out Matt Johnston <matt@ucc.asn.au> parents: 99 diff changeset	327 fcntl(cli_ses.stdincopy, F_SETFL, cli_ses.stdinflags);
175 2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	328 fcntl(cli_ses.stdoutcopy, F_SETFL, cli_ses.stdoutflags);
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	329 fcntl(cli_ses.stderrcopy, F_SETFL, cli_ses.stderrflags);
99 0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it Matt Johnston <matt@ucc.asn.au> parents: 74 diff changeset	330
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	331 cli_tty_cleanup();
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	332
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	333 }
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	334
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	335 static void cli_finished() {
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	336
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	337 session_cleanup();
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	338 fprintf(stderr, "Connection to %s@%s:%s closed.\n", cli_opts.username,
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	339 cli_opts.remotehost, cli_opts.remoteport);
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	340 exit(cli_ses.retval);
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	341 }
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	342
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	343
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	344 /* called when the remote side closes the connection */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	345 static void cli_remoteclosed() {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	346
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	347 /* XXX TODO perhaps print a friendlier message if we get this but have
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	348 * already sent/received disconnect message(s) ??? */
479 e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	349 m_close(ses.sock_in);
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	350 m_close(ses.sock_out);
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	351 ses.sock_in = -1;
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	352 ses.sock_out = -1;
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	353 dropbear_exit("Remote closed the connection");
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	354 }
43 942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	355
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	356 /* Operates in-place turning dirty (untrusted potentially containing control
249 efbaf6b03837 added keyboard-interactive client support Matt Johnston <matt@ucc.asn.au> parents: 215 diff changeset	357 * characters) text into clean text.
efbaf6b03837 added keyboard-interactive client support Matt Johnston <matt@ucc.asn.au> parents: 215 diff changeset	358 * Note: this is safe only with ascii - other charsets could have problems. */
43 942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	359 void cleantext(unsigned char* dirtytext) {
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	360
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	361 unsigned int i, j;
47 4b53a43f0082 - client pubkey auth works Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	362 unsigned char c;
43 942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	363
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	364 j = 0;
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	365 for (i = 0; dirtytext[i] != '\0'; i++) {
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	366
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	367 c = dirtytext[i];
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	368 /* We can ignore '\r's */
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	369 if ( (c >= ' ' && c <= '~') \|\| c == '\n' \|\| c == '\t') {
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	370 dirtytext[j] = c;
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	371 j++;
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	372 }
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	373 }
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	374 /* Null terminate */
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	375 dirtytext[j] = '\0';
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	376 }
937 4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	377
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	378 static void recv_msg_global_request_cli(void) {
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	379 TRACE(("recv_msg_global_request_cli"))
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	380 /* Send a proper rejection */
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	381 send_msg_request_failure();
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	382 }

Mercurial > dropbear

annotate cli-session.c @ 982:fd2e8bbb0333