dropbear: cli-session.c annotate

annotate cli-session.c @ 1027:daf21fd50abf fastopen

In theory TFO should work. Needs platform cleanup and testing

author	Matt Johnston <matt@ucc.asn.au>
date	Thu, 19 Feb 2015 00:32:00 +0800
parents	02baa0b334e8
children	64c0aa01e2b6

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
1025 02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	96 void cli_connected(int result, int sock, void* userdata, const char *errstring)
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	97 {
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	98 if (result == DROPBEAR_FAILURE)
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	99 {
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	100 dropbear_exit("Connect failed: %s", errstring);
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	101 }
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	102 ses.sock_in = ses.sock_out = sock;
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	103 }
02baa0b334e8 async connections working Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	104
1027 daf21fd50abf In theory TFO should work. Needs platform cleanup and testing Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	105 void cli_session(int sock_in, int sock_out, struct dropbear_progress_connection *progress) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 560 diff changeset	107 common_session_init(sock_in, sock_out);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108
1027 daf21fd50abf In theory TFO should work. Needs platform cleanup and testing Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	109 if (progress) {
daf21fd50abf In theory TFO should work. Needs platform cleanup and testing Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	110 connect_set_writequeue(progress, &ses.writequeue);
daf21fd50abf In theory TFO should work. Needs platform cleanup and testing Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	111 }
daf21fd50abf In theory TFO should work. Needs platform cleanup and testing Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	112
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113 chaninitialise(cli_chantypes);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	115 /* Set up cli_ses vars */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	116 cli_session_init();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117
1027 daf21fd50abf In theory TFO should work. Needs platform cleanup and testing Matt Johnston <matt@ucc.asn.au> parents: 1025 diff changeset	118
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 /* Ready to go */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120 sessinitdone = 1;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	121
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	122 /* 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	123 send_session_identification();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125 send_msg_kexinit();
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	126
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127 session_loop(cli_sessionloop);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 /* Not reached */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	131 }
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	133 #ifdef USE_KEX_FIRST_FOLLOWS
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	134 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	135 send_msg_kexdh_init();
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	136 }
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	137 #endif
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	138
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	139 static void cli_session_init() {
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	140
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	141 cli_ses.state = STATE_NOTHING;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	142 cli_ses.kex_state = KEX_NOTHING;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	143
39 0883c0906870 tty raw mode support works mostly Matt Johnston <matt@ucc.asn.au> parents: 37 diff changeset	144 cli_ses.tty_raw_mode = 0;
41 18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	145 cli_ses.winchange = 0;
39 0883c0906870 tty raw mode support works mostly Matt Johnston <matt@ucc.asn.au> parents: 37 diff changeset	146
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	147 /* 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	148 * (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	149 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	150 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	151 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	152 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	153 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	154 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	155
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	156 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	157 specific exit status */
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	158
47 4b53a43f0082 - client pubkey auth works Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	159 /* Auth */
215 aad4b3f58556 rename PubkeyList to SignKeyList for clarity Matt Johnston <matt@ucc.asn.au> parents: 175 diff changeset	160 cli_ses.lastprivkey = NULL;
136 fb7147e2fb04 - Fixed a couple of compile warnings Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	161 cli_ses.lastauthtype = 0;
47 4b53a43f0082 - client pubkey auth works Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	162
686 983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	163 #ifdef DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	164 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	165 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	166 #else
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	167 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	168 #endif
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	169
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	170 /* For printing "remote host closed" for the user */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	171 ses.remoteclosed = cli_remoteclosed;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	172
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	173 ses.extra_session_cleanup = cli_session_cleanup;
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	174
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	175 /* packet handlers */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	176 ses.packettypes = cli_packettypes;
35 0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 34 diff changeset	177
0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 34 diff changeset	178 ses.isserver = 0;
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	179
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	180 #ifdef USE_KEX_FIRST_FOLLOWS
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	181 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	182 #endif
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	183
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	185
727 00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	186 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	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 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	189
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	190 CHECKCLEARTOWRITE();
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	191
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	192 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	193 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	194
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	195 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	196 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	197 }
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	198
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	199 static void recv_msg_service_accept(void) {
857 c19acba28590 use oldstyle comments Matt Johnston <matt@ucc.asn.au> parents: 801 diff changeset	200 /* 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	201 }
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	202
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	203 /* 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	204 * service, userauth and channel requests */
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 static void cli_sessionloop() {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 727 diff changeset	207 TRACE2(("enter cli_sessionloop"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	208
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	209 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	210 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	211 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	212 }
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	213
34 e2a1eaa19f22 Client mostly works up to password auth Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	214 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	215 /* 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	216 * negotiation would have failed. */
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	217 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	218 send_msg_kexdh_init();
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	219 }
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	220 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	221 TRACE(("leave cli_sessionloop: done with KEXINIT_RCVD"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	222 return;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	223 }
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	224
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	225 /* 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	226 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	227 cli_ses.kex_state = KEX_NOTHING;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	228 }
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	229
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	230 /* 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	231 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	232 TRACE(("leave cli_sessionloop: kex_state != KEX_NOTHING"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	233 return;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	234 }
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	235
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	236 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	237 /* 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	238 * 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	239 TRACE2(("donefirstkex false\n"))
34 e2a1eaa19f22 Client mostly works up to password auth Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	240 return;
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	241 }
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	242
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243 switch (cli_ses.state) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	245 case STATE_NOTHING:
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	246 /* 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	247 * userauth */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	248 send_msg_service_request(SSH_SERVICE_USERAUTH);
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	249 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	250 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	251 TRACE(("leave cli_sessionloop: sent userauth methods req"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	252 return;
883 ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	253
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	254 case USERAUTH_REQ_SENT:
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	255 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	256 return;
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	257
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	258 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	259 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	260 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	261 }
45 9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	262 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	263 TRACE(("leave cli_sessionloop: cli_auth_try"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	264 return;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	265
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	266 case USERAUTH_SUCCESS_RCVD:
326 d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	267
686 983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	268 #ifdef DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	269 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	270 {
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	271 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	272 send_msg_kexinit();
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	273 }
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	274 #endif
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	275
326 d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	276 if (cli_opts.backgrounded) {
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	277 int devnull;
433 c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 326 diff changeset	278 /* 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	279 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	280 devnull = open(_PATH_DEVNULL, O_RDONLY);
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	281 if (devnull < 0) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	282 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	283 errno, strerror(errno));
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	284 }
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	285 dup2(devnull, STDIN_FILENO);
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	286 if (daemon(0, 1) < 0) {
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	287 dropbear_exit("Backgrounding failed: %d %s",
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	288 errno, strerror(errno));
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	289 }
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	290 }
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	291
485 12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument. Matt Johnston <matt@ucc.asn.au> parents: 478 diff changeset	292 #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	293 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	294 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	295 } else
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument. Matt Johnston <matt@ucc.asn.au> parents: 478 diff changeset	296 #endif
560 52d7301e46bd Agent forwarding works Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	297 if (!cli_opts.no_cmd) {
325 0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	298 cli_send_chansess_request();
0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	299 }
754 2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	300
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	301 #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	302 setup_localtcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	303 #endif
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	304 #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	305 setup_remotetcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	306 #endif
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	307
325 0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	308 TRACE(("leave cli_sessionloop: running"))
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	309 cli_ses.state = SESSION_RUNNING;
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	310 return;
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	311
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	312 case SESSION_RUNNING:
325 0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	313 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	314 cli_finished();
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	315 }
41 18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	316
18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	317 if (cli_ses.winchange) {
18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	318 cli_chansess_winchange();
18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	319 }
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	320 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	321
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	322 /* XXX more here needed */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	323
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	324
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	325 default:
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	326 break;
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	327 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	328
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 727 diff changeset	329 TRACE2(("leave cli_sessionloop: fell out"))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	330
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	331 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	332
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	333 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	334
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	335 if (!sessinitdone) {
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	336 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	337 }
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	338
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	339 /* 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	340 * we don't revert the flags */
100 c72f5c10125d oops, the fcntl() was commented out Matt Johnston <matt@ucc.asn.au> parents: 99 diff changeset	341 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	342 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	343 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	344
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	345 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	346
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	347 }
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	348
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	349 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	350
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	351 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	352 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	353 cli_opts.remotehost, cli_opts.remoteport);
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	354 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	355 }
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	356
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	357
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	358 /* called when the remote side closes the connection */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	359 static void cli_remoteclosed() {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	360
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	361 /* 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	362 * 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	363 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	364 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	365 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	366 ses.sock_out = -1;
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	367 dropbear_exit("Remote closed the connection");
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	368 }
43 942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	369
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	370 /* 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	371 * characters) text into clean text.
efbaf6b03837 added keyboard-interactive client support Matt Johnston <matt@ucc.asn.au> parents: 215 diff changeset	372 * 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	373 void cleantext(unsigned char* dirtytext) {
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	374
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	375 unsigned int i, j;
47 4b53a43f0082 - client pubkey auth works Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	376 unsigned char c;
43 942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	377
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	378 j = 0;
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	379 for (i = 0; dirtytext[i] != '\0'; i++) {
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	380
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	381 c = dirtytext[i];
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	382 /* We can ignore '\r's */
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	383 if ( (c >= ' ' && c <= '~') \|\| c == '\n' \|\| c == '\t') {
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	384 dirtytext[j] = c;
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	385 j++;
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	386 }
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	387 }
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	388 /* Null terminate */
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	389 dirtytext[j] = '\0';
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	390 }
937 4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	391
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	392 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	393 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	394 /* 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	395 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	396 }

Mercurial > dropbear

annotate cli-session.c @ 1027:daf21fd50abf fastopen