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Progressing client support

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--HG--
extra : convert_revision : 48946be1cef774d1c33b0f78689962b18720c627
This commit is contained in:
Matt Johnston
2004-07-27 16:30:46 +00:00
parent 052bf7df93
commit a76b1ba068
28 changed files with 601 additions and 178 deletions
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96
cli-session.c
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@@ -8,9 +8,11 @@
#include "tcpfwd-remote.h"
#include "channel.h"
#include "random.h"
#include "service.h"
static void cli_remoteclosed();
static void cli_sessionloop();
static void cli_session_init();
struct clientsession cli_ses; /* GLOBAL */
@@ -28,6 +30,8 @@ static const packettype cli_packettypes[] = {
{SSH_MSG_CHANNEL_CLOSE, recv_msg_channel_close},
{SSH_MSG_CHANNEL_OPEN_CONFIRMATION, recv_msg_channel_open_confirmation},
{SSH_MSG_CHANNEL_OPEN_FAILURE, recv_msg_channel_open_failure},
{SSH_MSG_USERAUTH_FAILURE, recv_msg_userauth_failure},
{SSH_MSG_USERAUTH_SUCCESS, recv_msg_userauth_success},
{0, 0} /* End */
};
@@ -37,6 +41,7 @@ static const struct ChanType *cli_chantypes[] = {
* that forwarding */
NULL /* Null termination */
};
void cli_session(int sock, char* remotehost) {
crypto_init();
@@ -44,11 +49,9 @@ void cli_session(int sock, char* remotehost) {
chaninitialise(cli_chantypes);
/* For printing "remote host closed" for the user */
session_remoteclosed = cli_remoteclosed;
/* packet handlers */
ses.packettypes = cli_packettypes;
/* Set up cli_ses vars */
cli_session_init();
/* Ready to go */
sessinitdone = 1;
@@ -66,27 +69,86 @@ void cli_session(int sock, char* remotehost) {
/* Not reached */
}
static void cli_session_init() {
cli_ses.state = STATE_NOTHING;
cli_ses.kex_state = KEX_NOTHING;
/* For printing "remote host closed" for the user */
ses.remoteclosed = cli_remoteclosed;
ses.buf_match_algo = cli_buf_match_algo;
/* packet handlers */
ses.packettypes = cli_packettypes;
}
/* This function drives the progress of the session - it initiates KEX,
* service, userauth and channel requests */
static void cli_sessionloop() {
TRACE(("enter cli_sessionloop"));
if (cli_ses.kex_state == KEX_NOTHING && ses.kexstate.recvkexinit) {
cli_ses.state = KEXINIT_RCVD;
}
if (cli_ses.state == KEXINIT_RCVD) {
/* We initiate the KEXDH. If DH wasn't the correct type, the KEXINIT
* negotiation would have failed. */
send_msg_kexdh_init();
cli_ses.kex_state = KEXDH_INIT_SENT;
TRACE(("leave cli_sessionloop: done with KEXINIT_RCVD"));
return;
}
/* A KEX has finished, so we should go back to our KEX_NOTHING state */
if (cli_ses.kex_state != KEX_NOTHING && ses.kexstate.recvkexinit == 0
&& ses.kexstate.sentkexinit == 0) {
cli_ses.kex_state = KEX_NOTHING;
}
/* We shouldn't do anything else if a KEX is in progress */
if (cli_ses.kex_state != KEX_NOTHING) {
TRACE(("leave cli_sessionloop: kex_state != KEX_NOTHING"));
return;
}
/* We should exit if we haven't donefirstkex: we shouldn't reach here
* in normal operation */
if (ses.kexstate.donefirstkex == 0) {
TRACE(("XXX XXX might be bad! leave cli_sessionloop: haven't donefirstkex"));
}
switch (cli_ses.state) {
KEXINIT_RCVD:
/* We initiate the KEX. If DH wasn't the correct type, the KEXINIT
* negotiation would have failed. */
send_msg_kexdh_init();
cli_ses.state = KEXDH_INIT_SENT;
break;
case STATE_NOTHING:
/* We've got the transport layer sorted, we now need to request
* userauth */
send_msg_service_request(SSH_SERVICE_USERAUTH);
cli_ses.state = SERVICE_AUTH_REQ_SENT;
return;
default:
break;
/* userauth code */
case SERVICE_AUTH_ACCEPT_RCVD:
cli_get_user();
cli_auth_getmethods();
cli_ses.state = USERAUTH_METHODS_SENT;
return;
case USERAUTH_FAIL_RCVD:
cli_auth_try();
return;
/* XXX more here needed */
default:
break;
}
if (cli_ses.donefirstkex && !cli_ses.authdone) {
}
@@ -97,5 +159,5 @@ static void cli_remoteclosed() {
* already sent/received disconnect message(s) ??? */
close(ses.sock);
ses.sock = -1;
dropbear_exit("%s closed the connection", ses.remotehost);
dropbear_exit("remote closed the connection");
}