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openssh-portable
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upstream commit 

refactor channels.c

Move static state to a "struct ssh_channels" that is allocated at
runtime and tracked as a member of struct ssh.

Explicitly pass "struct ssh" to all channels functions.

Replace use of the legacy packet APIs in channels.c.

Rework sshd_config PermitOpen handling: previously the configuration
parser would call directly into the channels layer. After the refactor
this is not possible, as the channels structures are allocated at
connection time and aren't available when the configuration is parsed.
The server config parser now tracks PermitOpen itself and explicitly
configures the channels code later.

ok markus@

Upstream-ID: 11828f161656b965cc306576422613614bea2d8f
This commit is contained in:
djm@openbsd.org 2017-09-12 06:32:07 +00:00 committed by Damien Miller
parent abd59663df
commit dbee4119b5
25 changed files with 2439 additions and 1990 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
auth-options.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth-options.c,v 1.73 2017/05/31 10:54:00 markus Exp $ */
/* $OpenBSD: auth-options.c,v 1.74 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -61,9 +61,13 @@ char *authorized_principals = NULL;
extern ServerOptions options;
/* XXX refactor to be stateless */
void
auth_clear_options(void)
{
struct ssh *ssh = active_state; /* XXX */
no_agent_forwarding_flag = 0;
no_port_forwarding_flag = 0;
no_pty_flag = 0;
@ -81,7 +85,7 @@ auth_clear_options(void)
free(authorized_principals);
authorized_principals = NULL;
forced_tun_device = -1;
channel_clear_permitted_opens();
channel_clear_permitted_opens(ssh);
}
/*
@ -117,6 +121,7 @@ match_flag(const char *opt, int allow_negate, char **optsp, const char *msg)
/*
* return 1 if access is granted, 0 if not.
* side effect: sets key option flags
* XXX remove side effects; fill structure instead.
*/
int
auth_parse_options(struct passwd *pw, char *opts, const char *file,
@ -380,7 +385,7 @@ auth_parse_options(struct passwd *pw, char *opts, const char *file,
goto bad_option;
}
if ((options.allow_tcp_forwarding & FORWARD_LOCAL) != 0)
channel_add_permitted_opens(host, port);
channel_add_permitted_opens(ssh, host, port);
free(patterns);
goto next_option;
}

3
auth.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth.c,v 1.123 2017/08/18 05:36:45 djm Exp $ */
/* $OpenBSD: auth.c,v 1.124 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
@ -567,6 +567,7 @@ getpwnamallow(const char *user)
ci->user = user;
parse_server_match_config(&options, ci);
log_change_level(options.log_level);
process_permitopen(ssh, &options);
#if defined(_AIX) && defined(HAVE_SETAUTHDB)
aix_setauthdb(user);

3009
channels.c
View File

File diff suppressed because it is too large Load Diff

178
channels.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: channels.h,v 1.127 2017/08/30 03:59:08 djm Exp $ */
/* $OpenBSD: channels.h,v 1.128 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -64,16 +64,18 @@
struct ssh;
struct Channel;
typedef struct Channel Channel;
struct fwd_perm_list;
typedef void channel_open_fn(int, int, void *);
typedef void channel_callback_fn(int, void *);
typedef int channel_infilter_fn(struct Channel *, char *, int);
typedef void channel_filter_cleanup_fn(int, void *);
typedef u_char *channel_outfilter_fn(struct Channel *, u_char **, u_int *);
typedef void channel_open_fn(struct ssh *, int, int, void *);
typedef void channel_callback_fn(struct ssh *, int, void *);
typedef int channel_infilter_fn(struct ssh *, struct Channel *, char *, int);
typedef void channel_filter_cleanup_fn(struct ssh *, int, void *);
typedef u_char *channel_outfilter_fn(struct ssh *, struct Channel *,
u_char **, size_t *);
/* Channel success/failure callbacks */
typedef void channel_confirm_cb(int, struct Channel *, void *);
typedef void channel_confirm_abandon_cb(struct Channel *, void *);
typedef void channel_confirm_cb(struct ssh *, int, struct Channel *, void *);
typedef void channel_confirm_abandon_cb(struct ssh *, struct Channel *, void *);
struct channel_confirm {
TAILQ_ENTRY(channel_confirm) entry;
channel_confirm_cb *cb;
@ -90,12 +92,13 @@ struct channel_connect {
};
/* Callbacks for mux channels back into client-specific code */
typedef int mux_callback_fn(struct Channel *);
typedef int mux_callback_fn(struct ssh *, struct Channel *);
struct Channel {
int type; /* channel type/state */
int self; /* my own channel identifier */
int remote_id; /* channel identifier for remote peer */
/* XXX should be uint32_t */
u_int istate; /* input from channel (state of receive half) */
u_int ostate; /* output to channel (state of transmit half) */
int flags; /* close sent/rcvd */
@ -116,11 +119,12 @@ struct Channel {
* to a matching pre-select handler.
* this way post-select handlers are not
* accidentally called if a FD gets reused */
Buffer input; /* data read from socket, to be sent over
struct sshbuf *input; /* data read from socket, to be sent over
* encrypted connection */
Buffer output; /* data received over encrypted connection for
struct sshbuf *output; /* data received over encrypted connection for
* send on socket */
Buffer extended;
struct sshbuf *extended;
char *path;
/* path for unix domain sockets, or host name for forwards */
int listening_port; /* port being listened for forwards */
@ -156,6 +160,7 @@ struct Channel {
int datagram;
/* non-blocking connect */
/* XXX make this a pointer so the structure can be opaque */
struct channel_connect connect_ctx;
/* multiplexing protocol hook, called for each packet received */
@ -195,44 +200,55 @@ struct Channel {
#define CHAN_EOF_RCVD 0x08
#define CHAN_LOCAL 0x10
#define CHAN_RBUF 16*1024
/* Read buffer size */
#define CHAN_RBUF (16*1024)
/* Hard limit on number of channels */
#define CHANNELS_MAX_CHANNELS (16*1024)
/* check whether 'efd' is still in use */
#define CHANNEL_EFD_INPUT_ACTIVE(c) \
(c->extended_usage == CHAN_EXTENDED_READ && \
(c->efd != -1 || \
buffer_len(&c->extended) > 0))
sshbuf_len(c->extended) > 0))
#define CHANNEL_EFD_OUTPUT_ACTIVE(c) \
(c->extended_usage == CHAN_EXTENDED_WRITE && \
c->efd != -1 && (!(c->flags & (CHAN_EOF_RCVD|CHAN_CLOSE_RCVD)) || \
buffer_len(&c->extended) > 0))
sshbuf_len(c->extended) > 0))
/* Add channel management structures to SSH transport instance */
void channel_init_channels(struct ssh *ssh);
/* channel management */
Channel *channel_by_id(int);
Channel *channel_by_remote_id(int);
Channel *channel_lookup(int);
Channel *channel_new(char *, int, int, int, int, u_int, u_int, int, char *, int);
void channel_set_fds(int, int, int, int, int, int, int, u_int);
void channel_free(Channel *);
void channel_free_all(void);
void channel_stop_listening(void);
Channel *channel_by_id(struct ssh *, int);
Channel *channel_by_remote_id(struct ssh *, int);
Channel *channel_lookup(struct ssh *, int);
Channel *channel_new(struct ssh *, char *, int, int, int, int,
u_int, u_int, int, char *, int);
void channel_set_fds(struct ssh *, int, int, int, int, int,
int, int, u_int);
void channel_free(struct ssh *, Channel *);
void channel_free_all(struct ssh *);
void channel_stop_listening(struct ssh *);
void channel_send_open(int);
void channel_request_start(int, char *, int);
void channel_register_cleanup(int, channel_callback_fn *, int);
void channel_register_open_confirm(int, channel_open_fn *, void *);
void channel_register_filter(int, channel_infilter_fn *,
channel_outfilter_fn *, channel_filter_cleanup_fn *, void *);
void channel_register_status_confirm(int, channel_confirm_cb *,
channel_confirm_abandon_cb *, void *);
void channel_cancel_cleanup(int);
int channel_close_fd(int *);
void channel_send_window_changes(void);
void channel_send_open(struct ssh *, int);
void channel_request_start(struct ssh *, int, char *, int);
void channel_register_cleanup(struct ssh *, int,
channel_callback_fn *, int);
void channel_register_open_confirm(struct ssh *, int,
channel_open_fn *, void *);
void channel_register_filter(struct ssh *, int, channel_infilter_fn *,
channel_outfilter_fn *, channel_filter_cleanup_fn *, void *);
void channel_register_status_confirm(struct ssh *, int,
channel_confirm_cb *, channel_confirm_abandon_cb *, void *);
void channel_cancel_cleanup(struct ssh *, int);
int channel_close_fd(struct ssh *, int *);
void channel_send_window_changes(struct ssh *);
/* mux proxy support */
int channel_proxy_downstream(Channel *mc);
int channel_proxy_downstream(struct ssh *, Channel *mc);
int channel_proxy_upstream(Channel *, int, u_int32_t, struct ssh *);
/* protocol handler */
@ -252,63 +268,69 @@ int channel_input_status_confirm(int, u_int32_t, struct ssh *);
void channel_prepare_select(struct ssh *, fd_set **, fd_set **, int *,
u_int*, time_t*);
void channel_after_select(struct ssh *, fd_set *, fd_set *);
void channel_output_poll(void);
void channel_output_poll(struct ssh *);
int channel_not_very_much_buffered_data(void);
void channel_close_all(void);
int channel_still_open(void);
char *channel_open_message(void);
int channel_find_open(void);
int channel_not_very_much_buffered_data(struct ssh *);
void channel_close_all(struct ssh *);
int channel_still_open(struct ssh *);
char *channel_open_message(struct ssh *);
int channel_find_open(struct ssh *);
/* tcp forwarding */
struct Forward;
struct ForwardOptions;
void channel_set_af(int af);
void channel_permit_all_opens(void);
void channel_add_permitted_opens(char *, int);
int channel_add_adm_permitted_opens(char *, int);
void channel_disable_adm_local_opens(void);
void channel_update_permitted_opens(int, int);
void channel_clear_permitted_opens(void);
void channel_clear_adm_permitted_opens(void);
void channel_print_adm_permitted_opens(void);
Channel *channel_connect_to_port(const char *, u_short, char *, char *, int *,
const char **);
Channel *channel_connect_to_path(const char *, char *, char *);
Channel *channel_connect_stdio_fwd(const char*, u_short, int, int);
Channel *channel_connect_by_listen_address(const char *, u_short,
char *, char *);
Channel *channel_connect_by_listen_path(const char *, char *, char *);
int channel_request_remote_forwarding(struct Forward *);
int channel_setup_local_fwd_listener(struct Forward *, struct ForwardOptions *);
int channel_request_rforward_cancel(struct Forward *);
int channel_setup_remote_fwd_listener(struct Forward *, int *, struct ForwardOptions *);
int channel_cancel_rport_listener(struct Forward *);
int channel_cancel_lport_listener(struct Forward *, int, struct ForwardOptions *);
void channel_set_af(struct ssh *, int af);
void channel_permit_all_opens(struct ssh *);
void channel_add_permitted_opens(struct ssh *, char *, int);
int channel_add_adm_permitted_opens(struct ssh *, char *, int);
void channel_copy_adm_permitted_opens(struct ssh *,
const struct fwd_perm_list *);
void channel_disable_adm_local_opens(struct ssh *);
void channel_update_permitted_opens(struct ssh *, int, int);
void channel_clear_permitted_opens(struct ssh *);
void channel_clear_adm_permitted_opens(struct ssh *);
void channel_print_adm_permitted_opens(struct ssh *);
Channel *channel_connect_to_port(struct ssh *, const char *, u_short,
char *, char *, int *, const char **);
Channel *channel_connect_to_path(struct ssh *, const char *, char *, char *);
Channel *channel_connect_stdio_fwd(struct ssh *, const char*,
u_short, int, int);
Channel *channel_connect_by_listen_address(struct ssh *, const char *,
u_short, char *, char *);
Channel *channel_connect_by_listen_path(struct ssh *, const char *,
char *, char *);
int channel_request_remote_forwarding(struct ssh *, struct Forward *);
int channel_setup_local_fwd_listener(struct ssh *, struct Forward *,
struct ForwardOptions *);
int channel_request_rforward_cancel(struct ssh *, struct Forward *);
int channel_setup_remote_fwd_listener(struct ssh *, struct Forward *,
int *, struct ForwardOptions *);
int channel_cancel_rport_listener(struct ssh *, struct Forward *);
int channel_cancel_lport_listener(struct ssh *, struct Forward *,
int, struct ForwardOptions *);
int permitopen_port(const char *);
/* x11 forwarding */
void channel_set_x11_refuse_time(u_int);
int x11_connect_display(void);
int x11_create_display_inet(int, int, int, u_int *, int **);
void x11_request_forwarding_with_spoofing(int, const char *, const char *,
const char *, int);
void channel_set_x11_refuse_time(struct ssh *, u_int);
int x11_connect_display(struct ssh *);
int x11_create_display_inet(struct ssh *, int, int, int, u_int *, int **);
void x11_request_forwarding_with_spoofing(struct ssh *, int,
const char *, const char *, const char *, int);
/* channel close */
int chan_is_dead(Channel *, int);
void chan_mark_dead(Channel *);
int chan_is_dead(struct ssh *, Channel *, int);
void chan_mark_dead(struct ssh *, Channel *);
/* channel events */
void chan_rcvd_oclose(Channel *);
void chan_rcvd_eow(Channel *); /* SSH2-only */
void chan_read_failed(Channel *);
void chan_ibuf_empty(Channel *);
void chan_rcvd_ieof(Channel *);
void chan_write_failed(Channel *);
void chan_obuf_empty(Channel *);
void chan_rcvd_oclose(struct ssh *, Channel *);
void chan_rcvd_eow(struct ssh *, Channel *);
void chan_read_failed(struct ssh *, Channel *);
void chan_ibuf_empty(struct ssh *, Channel *);
void chan_rcvd_ieof(struct ssh *, Channel *);
void chan_write_failed(struct ssh *, Channel *);
void chan_obuf_empty(struct ssh *, Channel *);
#endif

191
clientloop.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: clientloop.c,v 1.302 2017/08/30 03:59:08 djm Exp $ */
/* $OpenBSD: clientloop.c,v 1.303 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -177,6 +177,7 @@ struct channel_reply_ctx {
};
/* Global request success/failure callbacks */
/* XXX move to struct ssh? */
struct global_confirm {
TAILQ_ENTRY(global_confirm) entry;
global_confirm_cb *cb;
@ -244,13 +245,13 @@ get_current_time(void)
* control master process, or if there is no ControlPersist timeout.
*/
static void
set_control_persist_exit_time(void)
set_control_persist_exit_time(struct ssh *ssh)
{
if (muxserver_sock == -1 || !options.control_persist
|| options.control_persist_timeout == 0) {
/* not using a ControlPersist timeout */
control_persist_exit_time = 0;
} else if (channel_still_open()) {
} else if (channel_still_open(ssh)) {
/* some client connections are still open */
if (control_persist_exit_time > 0)
debug2("%s: cancel scheduled exit", __func__);
@ -288,8 +289,9 @@ client_x11_display_valid(const char *display)
#define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1"
#define X11_TIMEOUT_SLACK 60
int
client_x11_get_proto(const char *display, const char *xauth_path,
u_int trusted, u_int timeout, char **_proto, char **_data)
client_x11_get_proto(struct ssh *ssh, const char *display,
const char *xauth_path, u_int trusted, u_int timeout,
char **_proto, char **_data)
{
char cmd[1024], line[512], xdisplay[512];
char xauthfile[PATH_MAX], xauthdir[PATH_MAX];
@ -373,7 +375,8 @@ client_x11_get_proto(const char *display, const char *xauth_path,
x11_refuse_time = UINT_MAX;
else
x11_refuse_time = now + timeout;
channel_set_x11_refuse_time(x11_refuse_time);
channel_set_x11_refuse_time(ssh,
x11_refuse_time);
}
if (system(cmd) == 0)
generated = 1;
@ -446,7 +449,7 @@ client_x11_get_proto(const char *display, const char *xauth_path,
*/
static void
client_check_window_change(void)
client_check_window_change(struct ssh *ssh)
{
if (!received_window_change_signal)
return;
@ -455,7 +458,7 @@ client_check_window_change(void)
debug2("%s: changed", __func__);
channel_send_window_changes();
channel_send_window_changes(ssh);
}
static int
@ -466,7 +469,7 @@ client_global_request_reply(int type, u_int32_t seq, struct ssh *ssh)
if ((gc = TAILQ_FIRST(&global_confirms)) == NULL)
return 0;
if (gc->cb != NULL)
gc->cb(type, seq, gc->ctx);
gc->cb(ssh, type, seq, gc->ctx);
if (--gc->ref_count <= 0) {
TAILQ_REMOVE(&global_confirms, gc, entry);
explicit_bzero(gc, sizeof(*gc));
@ -497,7 +500,8 @@ server_alive_check(void)
* one of the file descriptors).
*/
static void
client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
client_wait_until_can_do_something(struct ssh *ssh,
fd_set **readsetp, fd_set **writesetp,
int *maxfdp, u_int *nallocp, int rekeying)
{
struct timeval tv, *tvp;
@ -510,7 +514,7 @@ client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
nallocp, &minwait_secs);
/* channel_prepare_select could have closed the last channel */
if (session_closed && !channel_still_open() &&
if (session_closed && !channel_still_open(ssh) &&
!packet_have_data_to_write()) {
/* clear mask since we did not call select() */
memset(*readsetp, 0, *nallocp);
@ -537,7 +541,7 @@ client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
}
if (options.rekey_interval > 0 && !rekeying)
timeout_secs = MINIMUM(timeout_secs, packet_get_rekey_timeout());
set_control_persist_exit_time();
set_control_persist_exit_time(ssh);
if (control_persist_exit_time > 0) {
timeout_secs = MINIMUM(timeout_secs,
control_persist_exit_time - now);
@ -668,7 +672,7 @@ client_process_net_input(fd_set *readset)
}
static void
client_status_confirm(int type, Channel *c, void *ctx)
client_status_confirm(struct ssh *ssh, int type, Channel *c, void *ctx)
{
struct channel_reply_ctx *cr = (struct channel_reply_ctx *)ctx;
char errmsg[256];
@ -707,8 +711,7 @@ client_status_confirm(int type, Channel *c, void *ctx)
* their stderr.
*/
if (tochan) {
buffer_append(&c->extended, errmsg,
strlen(errmsg));
buffer_append(c->extended, errmsg, strlen(errmsg));
} else
error("%s", errmsg);
if (cr->action == CONFIRM_TTY) {
@ -719,23 +722,23 @@ client_status_confirm(int type, Channel *c, void *ctx)
if (c->self == session_ident)
leave_raw_mode(0);
else
mux_tty_alloc_failed(c);
mux_tty_alloc_failed(ssh, c);
} else if (cr->action == CONFIRM_CLOSE) {
chan_read_failed(c);
chan_write_failed(c);
chan_read_failed(ssh, c);
chan_write_failed(ssh, c);
}
}
free(cr);
}
static void
client_abandon_status_confirm(Channel *c, void *ctx)
client_abandon_status_confirm(struct ssh *ssh, Channel *c, void *ctx)
{
free(ctx);
}
void
client_expect_confirm(int id, const char *request,
client_expect_confirm(struct ssh *ssh, int id, const char *request,
enum confirm_action action)
{
struct channel_reply_ctx *cr = xcalloc(1, sizeof(*cr));
@ -743,7 +746,7 @@ client_expect_confirm(int id, const char *request,
cr->request_type = request;
cr->action = action;
channel_register_status_confirm(id, client_status_confirm,
channel_register_status_confirm(ssh, id, client_status_confirm,
client_abandon_status_confirm, cr);
}
@ -769,7 +772,7 @@ client_register_global_confirm(global_confirm_cb *cb, void *ctx)
}
static void
process_cmdline(void)
process_cmdline(struct ssh *ssh)
{
void (*handler)(int);
char *s, *cmd;
@ -843,12 +846,12 @@ process_cmdline(void)
goto out;
}
if (remote)
ok = channel_request_rforward_cancel(&fwd) == 0;
ok = channel_request_rforward_cancel(ssh, &fwd) == 0;
else if (dynamic)
ok = channel_cancel_lport_listener(&fwd,
ok = channel_cancel_lport_listener(ssh, &fwd,
0, &options.fwd_opts) > 0;
else
ok = channel_cancel_lport_listener(&fwd,
ok = channel_cancel_lport_listener(ssh, &fwd,
CHANNEL_CANCEL_PORT_STATIC,
&options.fwd_opts) > 0;
if (!ok) {
@ -862,13 +865,13 @@ process_cmdline(void)
goto out;
}
if (local || dynamic) {
if (!channel_setup_local_fwd_listener(&fwd,
if (!channel_setup_local_fwd_listener(ssh, &fwd,
&options.fwd_opts)) {
logit("Port forwarding failed.");
goto out;
}
} else {
if (channel_request_remote_forwarding(&fwd) < 0) {
if (channel_request_remote_forwarding(ssh, &fwd) < 0) {
logit("Port forwarding failed.");
goto out;
}
@ -945,7 +948,8 @@ print_escape_help(Buffer *b, int escape_char, int mux_client, int using_stderr)
* Process the characters one by one.
*/
static int
process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr,
process_escapes(struct ssh *ssh, Channel *c,
Buffer *bin, Buffer *bout, Buffer *berr,
char *buf, int len)
{
char string[1024];
@ -981,13 +985,15 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr,
buffer_append(berr, string, strlen(string));
if (c && c->ctl_chan != -1) {
chan_read_failed(c);
chan_write_failed(c);
if (c->detach_user)
c->detach_user(c->self, NULL);
chan_read_failed(ssh, c);
chan_write_failed(ssh, c);
if (c->detach_user) {
c->detach_user(ssh,
c->self, NULL);
}
c->type = SSH_CHANNEL_ABANDONED;
buffer_clear(&c->input);
chan_ibuf_empty(c);
buffer_clear(c->input);
chan_ibuf_empty(ssh, c);
return 0;
} else
quit_pending = 1;
@ -1025,7 +1031,7 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr,
snprintf(string, sizeof string,
"%cB\r\n", efc->escape_char);
buffer_append(berr, string, strlen(string));
channel_request_start(c->self, "break", 0);
channel_request_start(ssh, c->self, "break", 0);
packet_put_int(1000);
packet_send();
continue;
@ -1077,7 +1083,7 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr,
options.request_tty == REQUEST_TTY_FORCE);
/* Stop listening for new connections. */
channel_stop_listening();
channel_stop_listening(ssh);
snprintf(string, sizeof string,
"%c& [backgrounded]\n", efc->escape_char);
@ -1107,7 +1113,7 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr,
snprintf(string, sizeof string, "%c#\r\n",
efc->escape_char);
buffer_append(berr, string, strlen(string));
s = channel_open_message();
s = channel_open_message(ssh);
buffer_append(berr, s, strlen(s));
free(s);
continue;
@ -1115,7 +1121,7 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr,
case 'C':
if (c && c->ctl_chan != -1)
goto noescape;
process_cmdline();
process_cmdline(ssh);
continue;
default:
@ -1186,25 +1192,25 @@ client_new_escape_filter_ctx(int escape_char)
/* Free the escape filter context on channel free */
void
client_filter_cleanup(int cid, void *ctx)
client_filter_cleanup(struct ssh *ssh, int cid, void *ctx)
{
free(ctx);
}
int
client_simple_escape_filter(Channel *c, char *buf, int len)
client_simple_escape_filter(struct ssh *ssh, Channel *c, char *buf, int len)
{
if (c->extended_usage != CHAN_EXTENDED_WRITE)
return 0;
return process_escapes(c, &c->input, &c->output, &c->extended,
return process_escapes(ssh, c, c->input, c->output, c->extended,
buf, len);
}
static void
client_channel_closed(int id, void *arg)
client_channel_closed(struct ssh *ssh, int id, void *arg)
{
channel_cancel_cleanup(id);
channel_cancel_cleanup(ssh, id);
session_closed = 1;
leave_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
}
@ -1215,9 +1221,9 @@ client_channel_closed(int id, void *arg)
* remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
* used as an escape character for terminating or suspending the session.
*/
int
client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
client_loop(struct ssh *ssh, int have_pty, int escape_char_arg,
int ssh2_chan_id)
{
fd_set *readset = NULL, *writeset = NULL;
double start_time, total_time;
@ -1295,13 +1301,13 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
session_ident = ssh2_chan_id;
if (session_ident != -1) {
if (escape_char_arg != SSH_ESCAPECHAR_NONE) {
channel_register_filter(session_ident,
channel_register_filter(ssh, session_ident,
client_simple_escape_filter, NULL,
client_filter_cleanup,
client_new_escape_filter_ctx(
escape_char_arg));
}
channel_register_cleanup(session_ident,
channel_register_cleanup(ssh, session_ident,
client_channel_closed, 0);
}
@ -1311,15 +1317,15 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
/* Process buffered packets sent by the server. */
client_process_buffered_input_packets();
if (session_closed && !channel_still_open())
if (session_closed && !channel_still_open(ssh))
break;
if (ssh_packet_is_rekeying(active_state)) {
if (ssh_packet_is_rekeying(ssh)) {
debug("rekeying in progress");
} else if (need_rekeying) {
/* manual rekey request */
debug("need rekeying");
if ((r = kex_start_rekex(active_state)) != 0)
if ((r = kex_start_rekex(ssh)) != 0)
fatal("%s: kex_start_rekex: %s", __func__,
ssh_err(r));
need_rekeying = 0;
@ -1329,13 +1335,13 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
* enqueue them for sending to the server.
*/
if (packet_not_very_much_data_to_write())
channel_output_poll();
channel_output_poll(ssh);
/*
* Check if the window size has changed, and buffer a
* message about it to the server if so.
*/
client_check_window_change();
client_check_window_change(ssh);
if (quit_pending)
break;
@ -1345,15 +1351,15 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
* available on one of the descriptors).
*/
max_fd2 = max_fd;
client_wait_until_can_do_something(&readset, &writeset,
&max_fd2, &nalloc, ssh_packet_is_rekeying(active_state));
client_wait_until_can_do_something(ssh, &readset, &writeset,
&max_fd2, &nalloc, ssh_packet_is_rekeying(ssh));
if (quit_pending)
break;
/* Do channel operations unless rekeying in progress. */
if (!ssh_packet_is_rekeying(active_state))
channel_after_select(active_state, readset, writeset);
if (!ssh_packet_is_rekeying(ssh))
channel_after_select(ssh, readset, writeset);
/* Buffer input from the connection. */
client_process_net_input(readset);
@ -1395,7 +1401,7 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
packet_send();
packet_write_wait();
channel_free_all();
channel_free_all(ssh);
if (have_pty)
leave_raw_mode(options.request_tty == REQUEST_TTY_FORCE);
@ -1463,8 +1469,8 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
/*********/
static Channel *
client_request_forwarded_tcpip(const char *request_type, int rchan,
u_int rwindow, u_int rmaxpack)
client_request_forwarded_tcpip(struct ssh *ssh, const char *request_type,
int rchan, u_int rwindow, u_int rmaxpack)
{
Channel *c = NULL;
struct sshbuf *b = NULL;
@ -1482,7 +1488,7 @@ client_request_forwarded_tcpip(const char *request_type, int rchan,
debug("%s: listen %s port %d, originator %s port %d", __func__,
listen_address, listen_port, originator_address, originator_port);
c = channel_connect_by_listen_address(listen_address, listen_port,
c = channel_connect_by_listen_address(ssh, listen_address, listen_port,
"forwarded-tcpip", originator_address);
if (c != NULL && c->type == SSH_CHANNEL_MUX_CLIENT) {
@ -1501,7 +1507,7 @@ client_request_forwarded_tcpip(const char *request_type, int rchan,
(r = sshbuf_put_u32(b, listen_port)) != 0 ||
(r = sshbuf_put_cstring(b, originator_address)) != 0 ||
(r = sshbuf_put_u32(b, originator_port)) != 0 ||
(r = sshbuf_put_stringb(&c->output, b)) != 0) {
(r = sshbuf_put_stringb(c->output, b)) != 0) {
error("%s: compose for muxclient %s", __func__,
ssh_err(r));
goto out;
@ -1516,7 +1522,8 @@ client_request_forwarded_tcpip(const char *request_type, int rchan,
}
static Channel *
client_request_forwarded_streamlocal(const char *request_type, int rchan)
client_request_forwarded_streamlocal(struct ssh *ssh,
const char *request_type, int rchan)
{
Channel *c = NULL;
char *listen_path;
@ -1530,14 +1537,14 @@ client_request_forwarded_streamlocal(const char *request_type, int rchan)
debug("%s: %s", __func__, listen_path);
c = channel_connect_by_listen_path(listen_path,
c = channel_connect_by_listen_path(ssh, listen_path,
"forwarded-streamlocal@openssh.com", "forwarded-streamlocal");
free(listen_path);
return c;
}
static Channel *
client_request_x11(const char *request_type, int rchan)
client_request_x11(struct ssh *ssh, const char *request_type, int rchan)
{
Channel *c = NULL;
char *originator;
@ -1567,10 +1574,10 @@ client_request_x11(const char *request_type, int rchan)
debug("client_request_x11: request from %s %d", originator,
originator_port);
free(originator);
sock = x11_connect_display();
sock = x11_connect_display(ssh);
if (sock < 0)
return NULL;
c = channel_new("x11",
c = channel_new(ssh, "x11",
SSH_CHANNEL_X11_OPEN, sock, sock, -1,
CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
c->force_drain = 1;
@ -1578,7 +1585,7 @@ client_request_x11(const char *request_type, int rchan)
}
static Channel *
client_request_agent(const char *request_type, int rchan)
client_request_agent(struct ssh *ssh, const char *request_type, int rchan)
{
Channel *c = NULL;
int r, sock;
@ -1595,7 +1602,7 @@ client_request_agent(const char *request_type, int rchan)
__func__, ssh_err(r));
return NULL;
}
c = channel_new("authentication agent connection",
c = channel_new(ssh, "authentication agent connection",
SSH_CHANNEL_OPEN, sock, sock, -1,
CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0,
"authentication agent connection", 1);
@ -1604,7 +1611,8 @@ client_request_agent(const char *request_type, int rchan)
}
int
client_request_tun_fwd(int tun_mode, int local_tun, int remote_tun)
client_request_tun_fwd(struct ssh *ssh, int tun_mode,
int local_tun, int remote_tun)
{
Channel *c;
int fd;
@ -1620,7 +1628,7 @@ client_request_tun_fwd(int tun_mode, int local_tun, int remote_tun)
return -1;
}
c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1,
c = channel_new(ssh, "tun", SSH_CHANNEL_OPENING, fd, fd, -1,
CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
c->datagram = 1;
@ -1660,14 +1668,14 @@ client_input_channel_open(int type, u_int32_t seq, struct ssh *ssh)
ctype, rchan, rwindow, rmaxpack);
if (strcmp(ctype, "forwarded-tcpip") == 0) {
c = client_request_forwarded_tcpip(ctype, rchan, rwindow,
c = client_request_forwarded_tcpip(ssh, ctype, rchan, rwindow,
rmaxpack);
} else if (strcmp(ctype, "forwarded-streamlocal@openssh.com") == 0) {
c = client_request_forwarded_streamlocal(ctype, rchan);
c = client_request_forwarded_streamlocal(ssh, ctype, rchan);
} else if (strcmp(ctype, "x11") == 0) {
c = client_request_x11(ctype, rchan);
c = client_request_x11(ssh, ctype, rchan);
} else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
c = client_request_agent(ctype, rchan);
c = client_request_agent(ssh, ctype, rchan);
}
if (c != NULL && c->type == SSH_CHANNEL_MUX_CLIENT) {
debug3("proxied to downstream: %s", ctype);
@ -1707,7 +1715,7 @@ client_input_channel_req(int type, u_int32_t seq, struct ssh *ssh)
char *rtype;
id = packet_get_int();
c = channel_lookup(id);
c = channel_lookup(ssh, id);
if (channel_proxy_upstream(c, type, seq, ssh))
return 0;
rtype = packet_get_string(NULL);
@ -1723,11 +1731,11 @@ client_input_channel_req(int type, u_int32_t seq, struct ssh *ssh)
"unknown channel", id);
} else if (strcmp(rtype, "eow@openssh.com") == 0) {
packet_check_eom();
chan_rcvd_eow(c);
chan_rcvd_eow(ssh, c);
} else if (strcmp(rtype, "exit-status") == 0) {
exitval = packet_get_int();
if (c->ctl_chan != -1) {
mux_exit_message(c, exitval);
mux_exit_message(ssh, c, exitval);
success = 1;
} else if (id == session_ident) {
/* Record exit value of local session */
@ -1895,9 +1903,9 @@ update_known_hosts(struct hostkeys_update_ctx *ctx)
}
static void
client_global_hostkeys_private_confirm(int type, u_int32_t seq, void *_ctx)
client_global_hostkeys_private_confirm(struct ssh *ssh, int type,
u_int32_t seq, void *_ctx)
{
struct ssh *ssh = active_state; /* XXX */
struct hostkeys_update_ctx *ctx = (struct hostkeys_update_ctx *)_ctx;
size_t i, ndone;
struct sshbuf *signdata;
@ -2161,7 +2169,7 @@ client_input_global_request(int type, u_int32_t seq, struct ssh *ssh)
}
void
client_session2_setup(int id, int want_tty, int want_subsystem,
client_session2_setup(struct ssh *ssh, int id, int want_tty, int want_subsystem,
const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env)
{
int len;
@ -2169,8 +2177,8 @@ client_session2_setup(int id, int want_tty, int want_subsystem,
debug2("%s: id %d", __func__, id);
if ((c = channel_lookup(id)) == NULL)
fatal("client_session2_setup: channel %d: unknown channel", id);
if ((c = channel_lookup(ssh, id)) == NULL)
fatal("%s: channel %d: unknown channel", __func__, id);
packet_set_interactive(want_tty,
options.ip_qos_interactive, options.ip_qos_bulk);
@ -2182,8 +2190,8 @@ client_session2_setup(int id, int want_tty, int want_subsystem,
if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0)
memset(&ws, 0, sizeof(ws));
channel_request_start(id, "pty-req", 1);
client_expect_confirm(id, "PTY allocation", CONFIRM_TTY);
channel_request_start(ssh, id, "pty-req", 1);
client_expect_confirm(ssh, id, "PTY allocation", CONFIRM_TTY);
packet_put_cstring(term != NULL ? term : "");
packet_put_int((u_int)ws.ws_col);
packet_put_int((u_int)ws.ws_row);
@ -2226,7 +2234,7 @@ client_session2_setup(int id, int want_tty, int want_subsystem,
}
debug("Sending env %s = %s", name, val);
channel_request_start(id, "env", 0);
channel_request_start(ssh, id, "env", 0);
packet_put_cstring(name);
packet_put_cstring(val);
packet_send();
@ -2241,19 +2249,20 @@ client_session2_setup(int id, int want_tty, int want_subsystem,
if (want_subsystem) {
debug("Sending subsystem: %.*s",
len, (u_char*)buffer_ptr(cmd));
channel_request_start(id, "subsystem", 1);
client_expect_confirm(id, "subsystem", CONFIRM_CLOSE);
channel_request_start(ssh, id, "subsystem", 1);
client_expect_confirm(ssh, id, "subsystem",
CONFIRM_CLOSE);
} else {
debug("Sending command: %.*s",
len, (u_char*)buffer_ptr(cmd));
channel_request_start(id, "exec", 1);
client_expect_confirm(id, "exec", CONFIRM_CLOSE);
channel_request_start(ssh, id, "exec", 1);
client_expect_confirm(ssh, id, "exec", CONFIRM_CLOSE);
}
packet_put_string(buffer_ptr(cmd), buffer_len(cmd));
packet_send();
} else {
channel_request_start(id, "shell", 1);
client_expect_confirm(id, "shell", CONFIRM_CLOSE);
channel_request_start(ssh, id, "shell", 1);
client_expect_confirm(ssh, id, "shell", CONFIRM_CLOSE);
packet_send();
}
}

31
clientloop.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: clientloop.h,v 1.33 2016/09/30 09:19:13 markus Exp $ */
/* $OpenBSD: clientloop.h,v 1.34 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -37,28 +37,31 @@
#include <termios.h>
struct ssh;
/* Client side main loop for the interactive session. */
int client_loop(int, int, int);
int client_x11_get_proto(const char *, const char *, u_int, u_int,
char **, char **);
int client_loop(struct ssh *, int, int, int);
int client_x11_get_proto(struct ssh *, const char *, const char *,
u_int, u_int, char **, char **);
void client_global_request_reply_fwd(int, u_int32_t, void *);
void client_session2_setup(int, int, int, const char *, struct termios *,
int, Buffer *, char **);
int client_request_tun_fwd(int, int, int);
void client_session2_setup(struct ssh *, int, int, int,
const char *, struct termios *, int, Buffer *, char **);
int client_request_tun_fwd(struct ssh *, int, int, int);
void client_stop_mux(void);
/* Escape filter for protocol 2 sessions */
void *client_new_escape_filter_ctx(int);
void client_filter_cleanup(int, void *);
int client_simple_escape_filter(Channel *, char *, int);
void client_filter_cleanup(struct ssh *, int, void *);
int client_simple_escape_filter(struct ssh *, Channel *, char *, int);
/* Global request confirmation callbacks */
typedef void global_confirm_cb(int, u_int32_t seq, void *);
typedef void global_confirm_cb(struct ssh *, int, u_int32_t, void *);
void client_register_global_confirm(global_confirm_cb *, void *);
/* Channel request confirmation callbacks */
enum confirm_action { CONFIRM_WARN = 0, CONFIRM_CLOSE, CONFIRM_TTY };
void client_expect_confirm(int, const char *, enum confirm_action);
void client_expect_confirm(struct ssh *, int, const char *,
enum confirm_action);
/* Multiplexing protocol version */
#define SSHMUX_VER 4
@ -73,8 +76,8 @@ void client_expect_confirm(int, const char *, enum confirm_action);
#define SSHMUX_COMMAND_CANCEL_FWD 7 /* Cancel forwarding(s) */
#define SSHMUX_COMMAND_PROXY 8 /* Open new connection */
void muxserver_listen(void);
void muxserver_listen(struct ssh *);
int muxclient(const char *);
void mux_exit_message(Channel *, int);
void mux_tty_alloc_failed(Channel *);
void mux_exit_message(struct ssh *, Channel *, int);
void mux_tty_alloc_failed(struct ssh *ssh, Channel *);

5
monitor.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: monitor.c,v 1.172 2017/06/24 06:34:38 djm Exp $ */
/* $OpenBSD: monitor.c,v 1.173 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* Copyright 2002 Markus Friedl <markus@openbsd.org>
@ -1519,13 +1519,14 @@ mm_answer_pty_cleanup(int sock, Buffer *m)
int
mm_answer_term(int sock, Buffer *req)
{
struct ssh *ssh = active_state; /* XXX */
extern struct monitor *pmonitor;
int res, status;
debug3("%s: tearing down sessions", __func__);
/* The child is terminating */
session_destroy_all(&mm_session_close);
session_destroy_all(ssh, &mm_session_close);
#ifdef USE_PAM
if (options.use_pam)

4
monitor_wrap.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: monitor_wrap.c,v 1.92 2017/05/30 14:10:53 markus Exp $ */
/* $OpenBSD: monitor_wrap.c,v 1.93 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* Copyright 2002 Markus Friedl <markus@openbsd.org>
@ -242,6 +242,7 @@ mm_key_sign(struct sshkey *key, u_char **sigp, u_int *lenp,
struct passwd *
mm_getpwnamallow(const char *username)
{
struct ssh *ssh = active_state; /* XXX */
Buffer m;
struct passwd *pw;
u_int len, i;
@ -296,6 +297,7 @@ out:
copy_set_server_options(&options, newopts, 1);
log_change_level(options.log_level);
process_permitopen(ssh, &options);
free(newopts);
buffer_free(&m);

191
mux.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: mux.c,v 1.65 2017/06/09 06:47:13 djm Exp $ */
/* $OpenBSD: mux.c,v 1.66 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright (c) 2002-2008 Damien Miller <djm@openbsd.org>
*
@ -161,22 +161,32 @@ struct mux_master_state {
#define MUX_FWD_REMOTE 2
#define MUX_FWD_DYNAMIC 3
static void mux_session_confirm(int, int, void *);
static void mux_stdio_confirm(int, int, void *);
static void mux_session_confirm(struct ssh *, int, int, void *);
static void mux_stdio_confirm(struct ssh *, int, int, void *);
static int process_mux_master_hello(u_int, Channel *, Buffer *, Buffer *);
static int process_mux_new_session(u_int, Channel *, Buffer *, Buffer *);
static int process_mux_alive_check(u_int, Channel *, Buffer *, Buffer *);
static int process_mux_terminate(u_int, Channel *, Buffer *, Buffer *);
static int process_mux_open_fwd(u_int, Channel *, Buffer *, Buffer *);
static int process_mux_close_fwd(u_int, Channel *, Buffer *, Buffer *);
static int process_mux_stdio_fwd(u_int, Channel *, Buffer *, Buffer *);
static int process_mux_stop_listening(u_int, Channel *, Buffer *, Buffer *);
static int process_mux_proxy(u_int, Channel *, Buffer *, Buffer *);
static int process_mux_master_hello(struct ssh *, u_int,
Channel *, struct sshbuf *, struct sshbuf *);
static int process_mux_new_session(struct ssh *, u_int,
Channel *, struct sshbuf *, struct sshbuf *);
static int process_mux_alive_check(struct ssh *, u_int,
Channel *, struct sshbuf *, struct sshbuf *);
static int process_mux_terminate(struct ssh *, u_int,
Channel *, struct sshbuf *, struct sshbuf *);
static int process_mux_open_fwd(struct ssh *, u_int,
Channel *, struct sshbuf *, struct sshbuf *);
static int process_mux_close_fwd(struct ssh *, u_int,
Channel *, struct sshbuf *, struct sshbuf *);
static int process_mux_stdio_fwd(struct ssh *, u_int,
Channel *, struct sshbuf *, struct sshbuf *);
static int process_mux_stop_listening(struct ssh *, u_int,
Channel *, struct sshbuf *, struct sshbuf *);
static int process_mux_proxy(struct ssh *, u_int,
Channel *, struct sshbuf *, struct sshbuf *);
static const struct {
u_int type;
int (*handler)(u_int, Channel *, Buffer *, Buffer *);
int (*handler)(struct ssh *, u_int, Channel *,
struct sshbuf *, struct sshbuf *);
} mux_master_handlers[] = {
{ MUX_MSG_HELLO, process_mux_master_hello },
{ MUX_C_NEW_SESSION, process_mux_new_session },
@ -193,36 +203,36 @@ static const struct {
/* Cleanup callback fired on closure of mux slave _session_ channel */
/* ARGSUSED */
static void
mux_master_session_cleanup_cb(int cid, void *unused)
mux_master_session_cleanup_cb(struct ssh *ssh, int cid, void *unused)
{
Channel *cc, *c = channel_by_id(cid);
Channel *cc, *c = channel_by_id(ssh, cid);
debug3("%s: entering for channel %d", __func__, cid);
if (c == NULL)
fatal("%s: channel_by_id(%i) == NULL", __func__, cid);
if (c->ctl_chan != -1) {
if ((cc = channel_by_id(c->ctl_chan)) == NULL)
if ((cc = channel_by_id(ssh, c->ctl_chan)) == NULL)
fatal("%s: channel %d missing control channel %d",
__func__, c->self, c->ctl_chan);
c->ctl_chan = -1;
cc->remote_id = -1;
chan_rcvd_oclose(cc);
chan_rcvd_oclose(ssh, cc);
}
channel_cancel_cleanup(c->self);
channel_cancel_cleanup(ssh, c->self);
}
/* Cleanup callback fired on closure of mux slave _control_ channel */
/* ARGSUSED */
static void
mux_master_control_cleanup_cb(int cid, void *unused)
mux_master_control_cleanup_cb(struct ssh *ssh, int cid, void *unused)
{
Channel *sc, *c = channel_by_id(cid);
Channel *sc, *c = channel_by_id(ssh, cid);
debug3("%s: entering for channel %d", __func__, cid);
if (c == NULL)
fatal("%s: channel_by_id(%i) == NULL", __func__, cid);
if (c->remote_id != -1) {
if ((sc = channel_by_id(c->remote_id)) == NULL)
if ((sc = channel_by_id(ssh, c->remote_id)) == NULL)
fatal("%s: channel %d missing session channel %d",
__func__, c->self, c->remote_id);
c->remote_id = -1;
@ -230,15 +240,15 @@ mux_master_control_cleanup_cb(int cid, void *unused)
if (sc->type != SSH_CHANNEL_OPEN &&
sc->type != SSH_CHANNEL_OPENING) {
debug2("%s: channel %d: not open", __func__, sc->self);
chan_mark_dead(sc);
chan_mark_dead(ssh, sc);
} else {
if (sc->istate == CHAN_INPUT_OPEN)
chan_read_failed(sc);
chan_read_failed(ssh, sc);
if (sc->ostate == CHAN_OUTPUT_OPEN)
chan_write_failed(sc);
chan_write_failed(ssh, sc);
}
}
channel_cancel_cleanup(c->self);
channel_cancel_cleanup(ssh, c->self);
}
/* Check mux client environment variables before passing them to mux master. */
@ -266,7 +276,8 @@ env_permitted(char *env)
/* Mux master protocol message handlers */
static int
process_mux_master_hello(u_int rid, Channel *c, Buffer *m, Buffer *r)
process_mux_master_hello(struct ssh *ssh, u_int rid,
Channel *c, Buffer *m, Buffer *r)
{
u_int ver;
struct mux_master_state *state = (struct mux_master_state *)c->mux_ctx;
@ -308,7 +319,8 @@ process_mux_master_hello(u_int rid, Channel *c, Buffer *m, Buffer *r)
}
static int
process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r)
process_mux_new_session(struct ssh *ssh, u_int rid,
Channel *c, Buffer *m, Buffer *r)
{
Channel *nc;
struct mux_session_confirm_ctx *cctx;
@ -453,7 +465,7 @@ process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r)
packetmax >>= 1;
}
nc = channel_new("session", SSH_CHANNEL_OPENING,
nc = channel_new(ssh, "session", SSH_CHANNEL_OPENING,
new_fd[0], new_fd[1], new_fd[2], window, packetmax,
CHAN_EXTENDED_WRITE, "client-session", /*nonblock*/0);
@ -461,7 +473,7 @@ process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r)
c->remote_id = nc->self; /* link control -> session channel */
if (cctx->want_tty && escape_char != 0xffffffff) {
channel_register_filter(nc->self,
channel_register_filter(ssh, nc->self,
client_simple_escape_filter, NULL,
client_filter_cleanup,
client_new_escape_filter_ctx((int)escape_char));
@ -470,17 +482,19 @@ process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r)
debug2("%s: channel_new: %d linked to control channel %d",
__func__, nc->self, nc->ctl_chan);
channel_send_open(nc->self);
channel_register_open_confirm(nc->self, mux_session_confirm, cctx);
channel_send_open(ssh, nc->self);
channel_register_open_confirm(ssh, nc->self, mux_session_confirm, cctx);
c->mux_pause = 1; /* stop handling messages until open_confirm done */
channel_register_cleanup(nc->self, mux_master_session_cleanup_cb, 1);
channel_register_cleanup(ssh, nc->self,
mux_master_session_cleanup_cb, 1);
/* reply is deferred, sent by mux_session_confirm */
return 0;
}
static int
process_mux_alive_check(u_int rid, Channel *c, Buffer *m, Buffer *r)
process_mux_alive_check(struct ssh *ssh, u_int rid,
Channel *c, Buffer *m, Buffer *r)
{
debug2("%s: channel %d: alive check", __func__, c->self);
@ -493,7 +507,8 @@ process_mux_alive_check(u_int rid, Channel *c, Buffer *m, Buffer *r)
}
static int
process_mux_terminate(u_int rid, Channel *c, Buffer *m, Buffer *r)
process_mux_terminate(struct ssh *ssh, u_int rid,
Channel *c, Buffer *m, Buffer *r)
{
debug2("%s: channel %d: terminate request", __func__, c->self);
@ -582,7 +597,7 @@ compare_forward(struct Forward *a, struct Forward *b)
}
static void
mux_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
mux_confirm_remote_forward(struct ssh *ssh, int type, u_int32_t seq, void *ctxt)
{
struct mux_channel_confirm_ctx *fctx = ctxt;
char *failmsg = NULL;
@ -590,7 +605,7 @@ mux_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
Channel *c;
Buffer out;
if ((c = channel_by_id(fctx->cid)) == NULL) {
if ((c = channel_by_id(ssh, fctx->cid)) == NULL) {
/* no channel for reply */
error("%s: unknown channel", __func__);
return;
@ -616,7 +631,7 @@ mux_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
buffer_put_int(&out, MUX_S_REMOTE_PORT);
buffer_put_int(&out, fctx->rid);
buffer_put_int(&out, rfwd->allocated_port);
channel_update_permitted_opens(rfwd->handle,
channel_update_permitted_opens(ssh, rfwd->handle,
rfwd->allocated_port);
} else {
buffer_put_int(&out, MUX_S_OK);
@ -625,7 +640,7 @@ mux_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
goto out;
} else {
if (rfwd->listen_port == 0)
channel_update_permitted_opens(rfwd->handle, -1);
channel_update_permitted_opens(ssh, rfwd->handle, -1);
if (rfwd->listen_path != NULL)
xasprintf(&failmsg, "remote port forwarding failed for "
"listen path %s", rfwd->listen_path);
@ -651,7 +666,7 @@ mux_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
buffer_put_cstring(&out, failmsg);
free(failmsg);
out:
buffer_put_string(&c->output, buffer_ptr(&out), buffer_len(&out));
buffer_put_string(c->output, buffer_ptr(&out), buffer_len(&out));
buffer_free(&out);
if (c->mux_pause <= 0)
fatal("%s: mux_pause %d", __func__, c->mux_pause);
@ -659,7 +674,8 @@ mux_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
}
static int
process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
process_mux_open_fwd(struct ssh *ssh, u_int rid,
Channel *c, Buffer *m, Buffer *r)
{
struct Forward fwd;
char *fwd_desc = NULL;
@ -727,13 +743,16 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
fwd.listen_port);
goto invalid;
}
if ((fwd.connect_port != PORT_STREAMLOCAL && fwd.connect_port >= 65536)
|| (ftype != MUX_FWD_DYNAMIC && ftype != MUX_FWD_REMOTE && fwd.connect_port == 0)) {
if ((fwd.connect_port != PORT_STREAMLOCAL &&
fwd.connect_port >= 65536) ||
(ftype != MUX_FWD_DYNAMIC && ftype != MUX_FWD_REMOTE &&
fwd.connect_port == 0)) {
logit("%s: invalid connect port %u", __func__,
fwd.connect_port);
goto invalid;
}
if (ftype != MUX_FWD_DYNAMIC && fwd.connect_host == NULL && fwd.connect_path == NULL) {
if (ftype != MUX_FWD_DYNAMIC && fwd.connect_host == NULL &&
fwd.connect_path == NULL) {
logit("%s: missing connect host", __func__);
goto invalid;
}
@ -784,7 +803,7 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
}
if (ftype == MUX_FWD_LOCAL || ftype == MUX_FWD_DYNAMIC) {
if (!channel_setup_local_fwd_listener(&fwd,
if (!channel_setup_local_fwd_listener(ssh, &fwd,
&options.fwd_opts)) {
fail:
logit("slave-requested %s failed", fwd_desc);
@ -798,7 +817,7 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
} else {
struct mux_channel_confirm_ctx *fctx;
fwd.handle = channel_request_remote_forwarding(&fwd);
fwd.handle = channel_request_remote_forwarding(ssh, &fwd);
if (fwd.handle < 0)
goto fail;
add_remote_forward(&options, &fwd);
@ -827,7 +846,8 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
}
static int
process_mux_close_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
process_mux_close_fwd(struct ssh *ssh, u_int rid,
Channel *c, Buffer *m, Buffer *r)
{
struct Forward fwd, *found_fwd;
char *fwd_desc = NULL;
@ -908,11 +928,11 @@ process_mux_close_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
* However, for dynamic allocated listen ports we need
* to use the actual listen port.
*/
if (channel_request_rforward_cancel(found_fwd) == -1)
if (channel_request_rforward_cancel(ssh, found_fwd) == -1)
error_reason = "port not in permitted opens";
} else { /* local and dynamic forwards */
/* Ditto */
if (channel_cancel_lport_listener(&fwd, fwd.connect_port,
if (channel_cancel_lport_listener(ssh, &fwd, fwd.connect_port,
&options.fwd_opts) == -1)
error_reason = "port not found";
}
@ -942,7 +962,8 @@ process_mux_close_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
}
static int
process_mux_stdio_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
process_mux_stdio_fwd(struct ssh *ssh, u_int rid,
Channel *c, Buffer *m, Buffer *r)
{
Channel *nc;
char *reserved, *chost;
@ -1018,7 +1039,7 @@ process_mux_stdio_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
if (!isatty(new_fd[1]))
set_nonblock(new_fd[1]);
nc = channel_connect_stdio_fwd(chost, cport, new_fd[0], new_fd[1]);
nc = channel_connect_stdio_fwd(ssh, chost, cport, new_fd[0], new_fd[1]);
nc->ctl_chan = c->self; /* link session -> control channel */
c->remote_id = nc->self; /* link control -> session channel */
@ -1026,11 +1047,12 @@ process_mux_stdio_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
debug2("%s: channel_new: %d linked to control channel %d",
__func__, nc->self, nc->ctl_chan);
channel_register_cleanup(nc->self, mux_master_session_cleanup_cb, 1);
channel_register_cleanup(ssh, nc->self,
mux_master_session_cleanup_cb, 1);
cctx = xcalloc(1, sizeof(*cctx));
cctx->rid = rid;
channel_register_open_confirm(nc->self, mux_stdio_confirm, cctx);
channel_register_open_confirm(ssh, nc->self, mux_stdio_confirm, cctx);
c->mux_pause = 1; /* stop handling messages until open_confirm done */
/* reply is deferred, sent by mux_session_confirm */
@ -1039,7 +1061,7 @@ process_mux_stdio_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
/* Callback on open confirmation in mux master for a mux stdio fwd session. */
static void
mux_stdio_confirm(int id, int success, void *arg)
mux_stdio_confirm(struct ssh *ssh, int id, int success, void *arg)
{
struct mux_stdio_confirm_ctx *cctx = arg;
Channel *c, *cc;
@ -1047,9 +1069,9 @@ mux_stdio_confirm(int id, int success, void *arg)
if (cctx == NULL)
fatal("%s: cctx == NULL", __func__);
if ((c = channel_by_id(id)) == NULL)
if ((c = channel_by_id(ssh, id)) == NULL)
fatal("%s: no channel for id %d", __func__, id);
if ((cc = channel_by_id(c->ctl_chan)) == NULL)
if ((cc = channel_by_id(ssh, c->ctl_chan)) == NULL)
fatal("%s: channel %d lacks control channel %d", __func__,
id, c->ctl_chan);
@ -1072,7 +1094,7 @@ mux_stdio_confirm(int id, int success, void *arg)
done:
/* Send reply */
buffer_put_string(&cc->output, buffer_ptr(&reply), buffer_len(&reply));
buffer_put_string(cc->output, buffer_ptr(&reply), buffer_len(&reply));
buffer_free(&reply);
if (cc->mux_pause <= 0)
@ -1083,7 +1105,8 @@ mux_stdio_confirm(int id, int success, void *arg)
}
static int
process_mux_stop_listening(u_int rid, Channel *c, Buffer *m, Buffer *r)
process_mux_stop_listening(struct ssh *ssh, u_int rid,
Channel *c, Buffer *m, Buffer *r)
{
debug("%s: channel %d: stop listening", __func__, c->self);
@ -1100,7 +1123,7 @@ process_mux_stop_listening(u_int rid, Channel *c, Buffer *m, Buffer *r)
}
if (mux_listener_channel != NULL) {
channel_free(mux_listener_channel);
channel_free(ssh, mux_listener_channel);
client_stop_mux();
free(options.control_path);
options.control_path = NULL;
@ -1116,7 +1139,8 @@ process_mux_stop_listening(u_int rid, Channel *c, Buffer *m, Buffer *r)
}
static int
process_mux_proxy(u_int rid, Channel *c, Buffer *m, Buffer *r)
process_mux_proxy(struct ssh *ssh, u_int rid,
Channel *c, Buffer *m, Buffer *r)
{
debug("%s: channel %d: proxy request", __func__, c->self);
@ -1129,7 +1153,7 @@ process_mux_proxy(u_int rid, Channel *c, Buffer *m, Buffer *r)
/* Channel callbacks fired on read/write from mux slave fd */
static int
mux_master_read_cb(Channel *c)
mux_master_read_cb(struct ssh *ssh, Channel *c)
{
struct mux_master_state *state = (struct mux_master_state *)c->mux_ctx;
Buffer in, out;
@ -1141,7 +1165,7 @@ mux_master_read_cb(Channel *c)
if (c->mux_ctx == NULL) {
state = xcalloc(1, sizeof(*state));
c->mux_ctx = state;
channel_register_cleanup(c->self,
channel_register_cleanup(ssh, c->self,
mux_master_control_cleanup_cb, 0);
/* Send hello */
@ -1149,7 +1173,7 @@ mux_master_read_cb(Channel *c)
buffer_put_int(&out, MUX_MSG_HELLO);
buffer_put_int(&out, SSHMUX_VER);
/* no extensions */
buffer_put_string(&c->output, buffer_ptr(&out),
buffer_put_string(c->output, buffer_ptr(&out),
buffer_len(&out));
buffer_free(&out);
debug3("%s: channel %d: hello sent", __func__, c->self);
@ -1160,7 +1184,7 @@ mux_master_read_cb(Channel *c)
buffer_init(&out);
/* Channel code ensures that we receive whole packets */
if ((ptr = buffer_get_string_ptr_ret(&c->input, &have)) == NULL) {
if ((ptr = buffer_get_string_ptr_ret(c->input, &have)) == NULL) {
malf:
error("%s: malformed message", __func__);
goto out;
@ -1186,7 +1210,8 @@ mux_master_read_cb(Channel *c)
for (i = 0; mux_master_handlers[i].handler != NULL; i++) {
if (type == mux_master_handlers[i].type) {
ret = mux_master_handlers[i].handler(rid, c, &in, &out);
ret = mux_master_handlers[i].handler(ssh, rid,
c, &in, &out);
break;
}
}
@ -1199,7 +1224,7 @@ mux_master_read_cb(Channel *c)
}
/* Enqueue reply packet */
if (buffer_len(&out) != 0) {
buffer_put_string(&c->output, buffer_ptr(&out),
buffer_put_string(c->output, buffer_ptr(&out),
buffer_len(&out));
}
out:
@ -1209,7 +1234,7 @@ mux_master_read_cb(Channel *c)
}
void
mux_exit_message(Channel *c, int exitval)
mux_exit_message(struct ssh *ssh, Channel *c, int exitval)
{
Buffer m;
Channel *mux_chan;
@ -1217,7 +1242,7 @@ mux_exit_message(Channel *c, int exitval)
debug3("%s: channel %d: exit message, exitval %d", __func__, c->self,
exitval);
if ((mux_chan = channel_by_id(c->ctl_chan)) == NULL)
if ((mux_chan = channel_by_id(ssh, c->ctl_chan)) == NULL)
fatal("%s: channel %d missing mux channel %d",
__func__, c->self, c->ctl_chan);
@ -1227,19 +1252,19 @@ mux_exit_message(Channel *c, int exitval)
buffer_put_int(&m, c->self);
buffer_put_int(&m, exitval);
buffer_put_string(&mux_chan->output, buffer_ptr(&m), buffer_len(&m));
buffer_put_string(mux_chan->output, buffer_ptr(&m), buffer_len(&m));
buffer_free(&m);
}
void
mux_tty_alloc_failed(Channel *c)
mux_tty_alloc_failed(struct ssh *ssh, Channel *c)
{
Buffer m;
Channel *mux_chan;
debug3("%s: channel %d: TTY alloc failed", __func__, c->self);
if ((mux_chan = channel_by_id(c->ctl_chan)) == NULL)
if ((mux_chan = channel_by_id(ssh, c->ctl_chan)) == NULL)
fatal("%s: channel %d missing mux channel %d",
__func__, c->self, c->ctl_chan);
@ -1248,13 +1273,13 @@ mux_tty_alloc_failed(Channel *c)
buffer_put_int(&m, MUX_S_TTY_ALLOC_FAIL);
buffer_put_int(&m, c->self);
buffer_put_string(&mux_chan->output, buffer_ptr(&m), buffer_len(&m));
buffer_put_string(mux_chan->output, buffer_ptr(&m), buffer_len(&m));
buffer_free(&m);
}
/* Prepare a mux master to listen on a Unix domain socket. */
void
muxserver_listen(void)
muxserver_listen(struct ssh *ssh)
{
mode_t old_umask;
char *orig_control_path = options.control_path;
@ -1327,7 +1352,7 @@ muxserver_listen(void)
set_nonblock(muxserver_sock);
mux_listener_channel = channel_new("mux listener",
mux_listener_channel = channel_new(ssh, "mux listener",
SSH_CHANNEL_MUX_LISTENER, muxserver_sock, muxserver_sock, -1,
CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
0, options.control_path, 1);
@ -1338,7 +1363,7 @@ muxserver_listen(void)
/* Callback on open confirmation in mux master for a mux client session. */
static void
mux_session_confirm(int id, int success, void *arg)
mux_session_confirm(struct ssh *ssh, int id, int success, void *arg)
{
struct mux_session_confirm_ctx *cctx = arg;
const char *display;
@ -1348,9 +1373,9 @@ mux_session_confirm(int id, int success, void *arg)
if (cctx == NULL)
fatal("%s: cctx == NULL", __func__);
if ((c = channel_by_id(id)) == NULL)
if ((c = channel_by_id(ssh, id)) == NULL)
fatal("%s: no channel for id %d", __func__, id);
if ((cc = channel_by_id(c->ctl_chan)) == NULL)
if ((cc = channel_by_id(ssh, c->ctl_chan)) == NULL)
fatal("%s: channel %d lacks control channel %d", __func__,
id, c->ctl_chan);
@ -1369,27 +1394,27 @@ mux_session_confirm(int id, int success, void *arg)
char *proto, *data;
/* Get reasonable local authentication information. */
if (client_x11_get_proto(display, options.xauth_location,
if (client_x11_get_proto(ssh, display, options.xauth_location,
options.forward_x11_trusted, options.forward_x11_timeout,
&proto, &data) == 0) {
/* Request forwarding with authentication spoofing. */
debug("Requesting X11 forwarding with authentication "
"spoofing.");
x11_request_forwarding_with_spoofing(id, display, proto,
data, 1);
x11_request_forwarding_with_spoofing(ssh, id,
display, proto, data, 1);
/* XXX exit_on_forward_failure */
client_expect_confirm(id, "X11 forwarding",
client_expect_confirm(ssh, id, "X11 forwarding",
CONFIRM_WARN);
}
}
if (cctx->want_agent_fwd && options.forward_agent) {
debug("Requesting authentication agent forwarding.");
channel_request_start(id, "auth-agent-req@openssh.com", 0);
channel_request_start(ssh, id, "auth-agent-req@openssh.com", 0);
packet_send();
}
client_session2_setup(id, cctx->want_tty, cctx->want_subsys,
client_session2_setup(ssh, id, cctx->want_tty, cctx->want_subsys,
cctx->term, &cctx->tio, c->rfd, &cctx->cmd, cctx->env);
debug3("%s: sending success reply", __func__);
@ -1401,7 +1426,7 @@ mux_session_confirm(int id, int success, void *arg)
done:
/* Send reply */
buffer_put_string(&cc->output, buffer_ptr(&reply), buffer_len(&reply));
buffer_put_string(cc->output, buffer_ptr(&reply), buffer_len(&reply));
buffer_free(&reply);
if (cc->mux_pause <= 0)

114
nchan.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: nchan.c,v 1.65 2017/04/30 23:28:42 djm Exp $ */
/* $OpenBSD: nchan.c,v 1.66 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl. All rights reserved.
*
@ -34,7 +34,8 @@
#include "openbsd-compat/sys-queue.h"
#include "ssh2.h"
#include "buffer.h"
#include "sshbuf.h"
#include "ssherr.h"
#include "packet.h"
#include "channels.h"
#include "compat.h"
@ -73,15 +74,15 @@
/*
* ACTIONS: should never update the channel states
*/
static void chan_send_eof2(Channel *);
static void chan_send_eow2(Channel *);
static void chan_send_eof2(struct ssh *, Channel *);
static void chan_send_eow2(struct ssh *, Channel *);
/* helper */
static void chan_shutdown_write(Channel *);
static void chan_shutdown_read(Channel *);
static void chan_shutdown_write(struct ssh *, Channel *);
static void chan_shutdown_read(struct ssh *, Channel *);
static char *ostates[] = { "open", "drain", "wait_ieof", "closed" };
static char *istates[] = { "open", "drain", "wait_oclose", "closed" };
static const char *ostates[] = { "open", "drain", "wait_ieof", "closed" };
static const char *istates[] = { "open", "drain", "wait_oclose", "closed" };
static void
chan_set_istate(Channel *c, u_int next)
@ -104,12 +105,12 @@ chan_set_ostate(Channel *c, u_int next)
}
void
chan_read_failed(Channel *c)
chan_read_failed(struct ssh *ssh, Channel *c)
{
debug2("channel %d: read failed", c->self);
switch (c->istate) {
case CHAN_INPUT_OPEN:
chan_shutdown_read(c);
chan_shutdown_read(ssh, c);
chan_set_istate(c, CHAN_INPUT_WAIT_DRAIN);
break;
default:
@ -120,10 +121,10 @@ chan_read_failed(Channel *c)
}
void
chan_ibuf_empty(Channel *c)
chan_ibuf_empty(struct ssh *ssh, Channel *c)
{
debug2("channel %d: ibuf empty", c->self);
if (buffer_len(&c->input)) {
if (sshbuf_len(c->input)) {
error("channel %d: chan_ibuf_empty for non empty buffer",
c->self);
return;
@ -131,7 +132,7 @@ chan_ibuf_empty(Channel *c)
switch (c->istate) {
case CHAN_INPUT_WAIT_DRAIN:
if (!(c->flags & (CHAN_CLOSE_SENT|CHAN_LOCAL)))
chan_send_eof2(c);
chan_send_eof2(ssh, c);
chan_set_istate(c, CHAN_INPUT_CLOSED);
break;
default:
@ -142,17 +143,17 @@ chan_ibuf_empty(Channel *c)
}
void
chan_obuf_empty(Channel *c)
chan_obuf_empty(struct ssh *ssh, Channel *c)
{
debug2("channel %d: obuf empty", c->self);
if (buffer_len(&c->output)) {
if (sshbuf_len(c->output)) {
error("channel %d: chan_obuf_empty for non empty buffer",
c->self);
return;
}
switch (c->ostate) {
case CHAN_OUTPUT_WAIT_DRAIN:
chan_shutdown_write(c);
chan_shutdown_write(ssh, c);
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
default:
@ -163,26 +164,29 @@ chan_obuf_empty(Channel *c)
}
void
chan_rcvd_eow(Channel *c)
chan_rcvd_eow(struct ssh *ssh, Channel *c)
{
debug2("channel %d: rcvd eow", c->self);
switch (c->istate) {
case CHAN_INPUT_OPEN:
chan_shutdown_read(c);
chan_shutdown_read(ssh, c);
chan_set_istate(c, CHAN_INPUT_CLOSED);
break;
}
}
static void
chan_send_eof2(Channel *c)
chan_send_eof2(struct ssh *ssh, Channel *c)
{
int r;
debug2("channel %d: send eof", c->self);
switch (c->istate) {
case CHAN_INPUT_WAIT_DRAIN:
packet_start(SSH2_MSG_CHANNEL_EOF);
packet_put_int(c->remote_id);
packet_send();
if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_EOF)) != 0 ||
(r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
(r = sshpkt_send(ssh)) != 0)
fatal("%s: send CHANNEL_EOF: %s", __func__, ssh_err(r));
c->flags |= CHAN_EOF_SENT;
break;
default:
@ -193,8 +197,10 @@ chan_send_eof2(Channel *c)
}
static void
chan_send_close2(Channel *c)
chan_send_close2(struct ssh *ssh, Channel *c)
{
int r;
debug2("channel %d: send close", c->self);
if (c->ostate != CHAN_OUTPUT_CLOSED ||
c->istate != CHAN_INPUT_CLOSED) {
@ -203,16 +209,19 @@ chan_send_close2(Channel *c)
} else if (c->flags & CHAN_CLOSE_SENT) {
error("channel %d: already sent close", c->self);
} else {
packet_start(SSH2_MSG_CHANNEL_CLOSE);
packet_put_int(c->remote_id);
packet_send();
if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_CLOSE)) != 0 ||
(r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
(r = sshpkt_send(ssh)) != 0)
fatal("%s: send CHANNEL_EOF: %s", __func__, ssh_err(r));
c->flags |= CHAN_CLOSE_SENT;
}
}
static void
chan_send_eow2(Channel *c)
chan_send_eow2(struct ssh *ssh, Channel *c)
{
int r;
debug2("channel %d: send eow", c->self);
if (c->ostate == CHAN_OUTPUT_CLOSED) {
error("channel %d: must not sent eow on closed output",
@ -221,30 +230,31 @@ chan_send_eow2(Channel *c)
}
if (!(datafellows & SSH_NEW_OPENSSH))
return;
packet_start(SSH2_MSG_CHANNEL_REQUEST);
packet_put_int(c->remote_id);
packet_put_cstring("eow@openssh.com");
packet_put_char(0);
packet_send();
if ((r = sshpkt_start(ssh, SSH2_MSG_CHANNEL_REQUEST)) != 0 ||
(r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
(r = sshpkt_put_cstring(ssh, "eow@openssh.com")) != 0 ||
(r = sshpkt_put_u8(ssh, 0)) != 0 ||
(r = sshpkt_send(ssh)) != 0)
fatal("%s: send CHANNEL_EOF: %s", __func__, ssh_err(r));
}
/* shared */
void
chan_rcvd_ieof(Channel *c)
chan_rcvd_ieof(struct ssh *ssh, Channel *c)
{
debug2("channel %d: rcvd eof", c->self);
c->flags |= CHAN_EOF_RCVD;
if (c->ostate == CHAN_OUTPUT_OPEN)
chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
if (c->ostate == CHAN_OUTPUT_WAIT_DRAIN &&
buffer_len(&c->output) == 0 &&
sshbuf_len(c->output) == 0 &&
!CHANNEL_EFD_OUTPUT_ACTIVE(c))
chan_obuf_empty(c);
chan_obuf_empty(ssh, c);
}
void
chan_rcvd_oclose(Channel *c)
chan_rcvd_oclose(struct ssh *ssh, Channel *c)
{
debug2("channel %d: rcvd close", c->self);
if (!(c->flags & CHAN_LOCAL)) {
@ -270,27 +280,27 @@ chan_rcvd_oclose(Channel *c)
}
switch (c->istate) {
case CHAN_INPUT_OPEN:
chan_shutdown_read(c);
chan_shutdown_read(ssh, c);
chan_set_istate(c, CHAN_INPUT_CLOSED);
break;
case CHAN_INPUT_WAIT_DRAIN:
if (!(c->flags & CHAN_LOCAL))
chan_send_eof2(c);
chan_send_eof2(ssh, c);
chan_set_istate(c, CHAN_INPUT_CLOSED);
break;
}
}
void
chan_write_failed(Channel *c)
chan_write_failed(struct ssh *ssh, Channel *c)
{
debug2("channel %d: write failed", c->self);
switch (c->ostate) {
case CHAN_OUTPUT_OPEN:
case CHAN_OUTPUT_WAIT_DRAIN:
chan_shutdown_write(c);
chan_shutdown_write(ssh, c);
if (strcmp(c->ctype, "session") == 0)
chan_send_eow2(c);
chan_send_eow2(ssh, c);
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
default:
@ -301,13 +311,13 @@ chan_write_failed(Channel *c)
}
void
chan_mark_dead(Channel *c)
chan_mark_dead(struct ssh *ssh, Channel *c)
{
c->type = SSH_CHANNEL_ZOMBIE;
}
int
chan_is_dead(Channel *c, int do_send)
chan_is_dead(struct ssh *ssh, Channel *c, int do_send)
{
if (c->type == SSH_CHANNEL_ZOMBIE) {
debug2("channel %d: zombie", c->self);
@ -318,9 +328,9 @@ chan_is_dead(Channel *c, int do_send)
if ((datafellows & SSH_BUG_EXTEOF) &&
c->extended_usage == CHAN_EXTENDED_WRITE &&
c->efd != -1 &&
buffer_len(&c->extended) > 0) {
debug2("channel %d: active efd: %d len %d",
c->self, c->efd, buffer_len(&c->extended));
sshbuf_len(c->extended) > 0) {
debug2("channel %d: active efd: %d len %zu",
c->self, c->efd, sshbuf_len(c->extended));
return 0;
}
if (c->flags & CHAN_LOCAL) {
@ -329,7 +339,7 @@ chan_is_dead(Channel *c, int do_send)
}
if (!(c->flags & CHAN_CLOSE_SENT)) {
if (do_send) {
chan_send_close2(c);
chan_send_close2(ssh, c);
} else {
/* channel would be dead if we sent a close */
if (c->flags & CHAN_CLOSE_RCVD) {
@ -349,9 +359,9 @@ chan_is_dead(Channel *c, int do_send)
/* helper */
static void
chan_shutdown_write(Channel *c)
chan_shutdown_write(struct ssh *ssh, Channel *c)
{
buffer_clear(&c->output);
sshbuf_reset(c->output);
if (c->type == SSH_CHANNEL_LARVAL)
return;
/* shutdown failure is allowed if write failed already */
@ -362,7 +372,7 @@ chan_shutdown_write(Channel *c)
"shutdown() failed for fd %d: %.100s",
c->self, c->sock, strerror(errno));
} else {
if (channel_close_fd(&c->wfd) < 0)
if (channel_close_fd(ssh, &c->wfd) < 0)
logit("channel %d: chan_shutdown_write: "
"close() failed for fd %d: %.100s",
c->self, c->wfd, strerror(errno));
@ -370,7 +380,7 @@ chan_shutdown_write(Channel *c)
}
static void
chan_shutdown_read(Channel *c)
chan_shutdown_read(struct ssh *ssh, Channel *c)
{
if (c->type == SSH_CHANNEL_LARVAL)
return;
@ -388,7 +398,7 @@ chan_shutdown_read(Channel *c)
c->self, c->sock, c->istate, c->ostate,
strerror(errno));
} else {
if (channel_close_fd(&c->rfd) < 0)
if (channel_close_fd(ssh, &c->rfd) < 0)
logit("channel %d: chan_shutdown_read: "
"close() failed for fd %d: %.100s",
c->self, c->rfd, strerror(errno));

68
packet.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: packet.c,v 1.263 2017/07/23 23:37:02 djm Exp $ */
/* $OpenBSD: packet.c,v 1.264 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -2090,35 +2090,6 @@ ssh_packet_get_maxsize(struct ssh *ssh)
return ssh->state->max_packet_size;
}
/*
* 9.2. Ignored Data Message
*
* byte SSH_MSG_IGNORE
* string data
*
* All implementations MUST understand (and ignore) this message at any
* time (after receiving the protocol version). No implementation is
* required to send them. This message can be used as an additional
* protection measure against advanced traffic analysis techniques.
*/
void
ssh_packet_send_ignore(struct ssh *ssh, int nbytes)
{
u_int32_t rnd = 0;
int r, i;
if ((r = sshpkt_start(ssh, SSH2_MSG_IGNORE)) != 0 ||
(r = sshpkt_put_u32(ssh, nbytes)) != 0)
fatal("%s: %s", __func__, ssh_err(r));
for (i = 0; i < nbytes; i++) {
if (i % 4 == 0)
rnd = arc4random();
if ((r = sshpkt_put_u8(ssh, (u_char)rnd & 0xff)) != 0)
fatal("%s: %s", __func__, ssh_err(r));
rnd >>= 8;
}
}
void
ssh_packet_set_rekey_limits(struct ssh *ssh, u_int64_t bytes, u_int32_t seconds)
{
@ -2538,6 +2509,12 @@ sshpkt_get_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp)
return sshbuf_get_string_direct(ssh->state->incoming_packet, valp, lenp);
}
int
sshpkt_peek_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp)
{
return sshbuf_peek_string_direct(ssh->state->incoming_packet, valp, lenp);
}
int
sshpkt_get_cstring(struct ssh *ssh, char **valp, size_t *lenp)
{
@ -2621,6 +2598,37 @@ ssh_packet_send_mux(struct ssh *ssh)
return 0;
}
/*
* 9.2. Ignored Data Message
*
* byte SSH_MSG_IGNORE
* string data
*
* All implementations MUST understand (and ignore) this message at any
* time (after receiving the protocol version). No implementation is
* required to send them. This message can be used as an additional
* protection measure against advanced traffic analysis techniques.
*/
int
sshpkt_msg_ignore(struct ssh *ssh, u_int nbytes)
{
u_int32_t rnd = 0;
int r;
u_int i;
if ((r = sshpkt_start(ssh, SSH2_MSG_IGNORE)) != 0 ||
(r = sshpkt_put_u32(ssh, nbytes)) != 0)
return r;
for (i = 0; i < nbytes; i++) {
if (i % 4 == 0)
rnd = arc4random();
if ((r = sshpkt_put_u8(ssh, (u_char)rnd & 0xff)) != 0)
return r;
rnd >>= 8;
}
return 0;
}
/* send it */
int

8
packet.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: packet.h,v 1.81 2017/05/31 08:09:45 markus Exp $ */
/* $OpenBSD: packet.h,v 1.82 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -80,6 +80,9 @@ struct ssh {
/* Client/Server authentication context */
void *authctxt;
/* Channels context */
struct ssh_channels *chanctxt;
/* APP data */
void *app_data;
};
@ -143,7 +146,6 @@ int ssh_packet_not_very_much_data_to_write(struct ssh *);
int ssh_packet_connection_is_on_socket(struct ssh *);
int ssh_packet_remaining(struct ssh *);
void ssh_packet_send_ignore(struct ssh *, int);
void tty_make_modes(int, struct termios *);
void tty_parse_modes(int, int *);
@ -174,6 +176,7 @@ int sshpkt_disconnect(struct ssh *, const char *fmt, ...)
__attribute__((format(printf, 2, 3)));
int sshpkt_add_padding(struct ssh *, u_char);
void sshpkt_fatal(struct ssh *ssh, const char *tag, int r);
int sshpkt_msg_ignore(struct ssh *, u_int);
int sshpkt_put(struct ssh *ssh, const void *v, size_t len);
int sshpkt_putb(struct ssh *ssh, const struct sshbuf *b);
@ -192,6 +195,7 @@ int sshpkt_get_u32(struct ssh *ssh, u_int32_t *valp);
int sshpkt_get_u64(struct ssh *ssh, u_int64_t *valp);
int sshpkt_get_string(struct ssh *ssh, u_char **valp, size_t *lenp);
int sshpkt_get_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp);
int sshpkt_peek_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp);
int sshpkt_get_cstring(struct ssh *ssh, char **valp, size_t *lenp);
int sshpkt_get_ec(struct ssh *ssh, EC_POINT *v, const EC_GROUP *g);
int sshpkt_get_bignum2(struct ssh *ssh, BIGNUM *v);

87
servconf.c
View File

@ -1,5 +1,5 @@
/* $OpenBSD: servconf.c,v 1.309 2017/06/24 06:34:38 djm Exp $ */
/* $OpenBSD: servconf.c,v 1.310 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
@ -149,7 +149,7 @@ initialize_server_options(ServerOptions *options)
options->num_authkeys_files = 0;
options->num_accept_env = 0;
options->permit_tun = -1;
options->num_permitted_opens = -1;
options->permitted_opens = NULL;
options->adm_forced_command = NULL;
options->chroot_directory = NULL;
options->authorized_keys_command = NULL;
@ -697,6 +697,44 @@ process_queued_listen_addrs(ServerOptions *options)
options->num_queued_listens = 0;
}
/*
* Inform channels layer of permitopen options from configuration.
*/
void
process_permitopen(struct ssh *ssh, ServerOptions *options)
{
u_int i;
int port;
char *host, *arg, *oarg;
channel_clear_adm_permitted_opens(ssh);
if (options->num_permitted_opens == 0)
return; /* permit any */
/* handle keywords: "any" / "none" */
if (options->num_permitted_opens == 1 &&
strcmp(options->permitted_opens[0], "any") == 0)
return;
if (options->num_permitted_opens == 1 &&
strcmp(options->permitted_opens[0], "none") == 0) {
channel_disable_adm_local_opens(ssh);
return;
}
/* Otherwise treat it as a list of permitted host:port */
for (i = 0; i < options->num_permitted_opens; i++) {
oarg = arg = xstrdup(options->permitted_opens[i]);
host = hpdelim(&arg);
if (host == NULL)
fatal("%s: missing host in PermitOpen", __func__);
host = cleanhostname(host);
if (arg == NULL || ((port = permitopen_port(arg)) < 0))
fatal("%s: bad port number in PermitOpen", __func__);
/* Send it to channels layer */
channel_add_adm_permitted_opens(ssh, host, port);
free(oarg);
}
}
struct connection_info *
get_connection_info(int populate, int use_dns)
{
@ -954,7 +992,7 @@ process_server_config_line(ServerOptions *options, char *line,
const char *filename, int linenum, int *activep,
struct connection_info *connectinfo)
{
char *cp, **charptr, *arg, *p;
char *cp, **charptr, *arg, *arg2, *p;
int cmdline = 0, *intptr, value, value2, n, port;
SyslogFacility *log_facility_ptr;
LogLevel *log_level_ptr;
@ -1625,24 +1663,17 @@ process_server_config_line(ServerOptions *options, char *line,
if (!arg || *arg == '\0')
fatal("%s line %d: missing PermitOpen specification",
filename, linenum);
n = options->num_permitted_opens; /* modified later */
if (strcmp(arg, "any") == 0) {
if (*activep && n == -1) {
channel_clear_adm_permitted_opens();
options->num_permitted_opens = 0;
}
break;
}
if (strcmp(arg, "none") == 0) {
if (*activep && n == -1) {
i = options->num_permitted_opens; /* modified later */
if (strcmp(arg, "any") == 0 || strcmp(arg, "none") == 0) {
if (*activep && i == 0)
options->num_permitted_opens = 1;
channel_disable_adm_local_opens();
}
options->permitted_opens = xcalloc(1,
sizeof(*options->permitted_opens));
options->permitted_opens[0] = xstrdup(arg);
break;
}
if (*activep && n == -1)
channel_clear_adm_permitted_opens();
for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
arg2 = xstrdup(arg);
p = hpdelim(&arg);
if (p == NULL)
fatal("%s line %d: missing host in PermitOpen",
@ -1651,9 +1682,16 @@ process_server_config_line(ServerOptions *options, char *line,
if (arg == NULL || ((port = permitopen_port(arg)) < 0))
fatal("%s line %d: bad port number in "
"PermitOpen", filename, linenum);
if (*activep && n == -1)
options->num_permitted_opens =
channel_add_adm_permitted_opens(p, port);
if (*activep && i == 0) {
options->permitted_opens = xrecallocarray(
options->permitted_opens,
options->num_permitted_opens,
options->num_permitted_opens + 1,
sizeof(*options->permitted_opens));
i = options->num_permitted_opens++;
options->permitted_opens[i] = arg2;
} else
free(arg2);
}
break;
@ -2352,5 +2390,12 @@ dump_config(ServerOptions *o)
printf("rekeylimit %llu %d\n", (unsigned long long)o->rekey_limit,
o->rekey_interval);
channel_print_adm_permitted_opens();
printf("permitopen");
if (o->num_permitted_opens == 0)
printf(" any");
else {
for (i = 0; i < o->num_permitted_opens; i++)
printf(" %s", o->permitted_opens[i]);
}
printf("\n");
}

14
servconf.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: servconf.h,v 1.124 2017/06/24 06:34:38 djm Exp $ */
/* $OpenBSD: servconf.h,v 1.125 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -48,12 +48,19 @@
#define FORWARD_LOCAL (1<<1)
#define FORWARD_ALLOW (FORWARD_REMOTE|FORWARD_LOCAL)
/* PermitOpen */
#define PERMITOPEN_ANY 0
#define PERMITOPEN_NONE -2
#define DEFAULT_AUTH_FAIL_MAX 6 /* Default for MaxAuthTries */
#define DEFAULT_SESSIONS_MAX 10 /* Default for MaxSessions */
/* Magic name for internal sftp-server */
#define INTERNAL_SFTP_NAME "internal-sftp"
struct ssh;
struct fwd_perm_list;
typedef struct {
u_int num_ports;
u_int ports_from_cmdline;
@ -169,7 +176,8 @@ typedef struct {
int permit_tun;
int num_permitted_opens;
char **permitted_opens;
u_int num_permitted_opens; /* May also be one of PERMITOPEN_* */
char *chroot_directory;
char *revoked_keys_file;
@ -229,6 +237,7 @@ struct connection_info {
M_CP_STRARRAYOPT(deny_groups, num_deny_groups); \
M_CP_STRARRAYOPT(accept_env, num_accept_env); \
M_CP_STRARRAYOPT(auth_methods, num_auth_methods); \
M_CP_STRARRAYOPT(permitted_opens, num_permitted_opens); \
} while (0)
struct connection_info *get_connection_info(int, int);
@ -236,6 +245,7 @@ void initialize_server_options(ServerOptions *);
void fill_default_server_options(ServerOptions *);
int process_server_config_line(ServerOptions *, char *, const char *, int,
int *, struct connection_info *);
void process_permitopen(struct ssh *ssh, ServerOptions *options);
void load_server_config(const char *, Buffer *);
void parse_server_config(ServerOptions *, const char *, Buffer *,
struct connection_info *);

105
serverloop.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: serverloop.c,v 1.196 2017/08/30 03:59:08 djm Exp $ */
/* $OpenBSD: serverloop.c,v 1.197 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -165,7 +165,7 @@ sigterm_handler(int sig)
}
static void
client_alive_check(void)
client_alive_check(struct ssh *ssh)
{
int channel_id;
@ -179,12 +179,13 @@ client_alive_check(void)
* send a bogus global/channel request with "wantreply",
* we should get back a failure
*/
if ((channel_id = channel_find_open()) == -1) {
if ((channel_id = channel_find_open(ssh)) == -1) {
packet_start(SSH2_MSG_GLOBAL_REQUEST);
packet_put_cstring("keepalive@openssh.com");
packet_put_char(1); /* boolean: want reply */
} else {
channel_request_start(channel_id, "keepalive@openssh.com", 1);
channel_request_start(ssh, channel_id,
"keepalive@openssh.com", 1);
}
packet_send();
}
@ -196,7 +197,8 @@ client_alive_check(void)
* for the duration of the wait (0 = infinite).
*/
static void
wait_until_can_do_something(int connection_in, int connection_out,
wait_until_can_do_something(struct ssh *ssh,
int connection_in, int connection_out,
fd_set **readsetp, fd_set **writesetp, int *maxfdp,
u_int *nallocp, u_int64_t max_time_ms)
{
@ -207,7 +209,7 @@ wait_until_can_do_something(int connection_in, int connection_out,
static time_t last_client_time;
/* Allocate and update select() masks for channel descriptors. */
channel_prepare_select(active_state, readsetp, writesetp, maxfdp,
channel_prepare_select(ssh, readsetp, writesetp, maxfdp,
nallocp, &minwait_secs);
/* XXX need proper deadline system for rekey/client alive */
@ -273,12 +275,12 @@ wait_until_can_do_something(int connection_in, int connection_out,
time_t now = monotime();
if (ret == 0) { /* timeout */
client_alive_check();
client_alive_check(ssh);
} else if (FD_ISSET(connection_in, *readsetp)) {
last_client_time = now;
} else if (last_client_time != 0 && last_client_time +
options.client_alive_interval <= now) {
client_alive_check();
client_alive_check(ssh);
last_client_time = now;
}
}
@ -291,9 +293,8 @@ wait_until_can_do_something(int connection_in, int connection_out,
* in buffers and processed later.
*/
static int
process_input(fd_set *readset, int connection_in)
process_input(struct ssh *ssh, fd_set *readset, int connection_in)
{
struct ssh *ssh = active_state; /* XXX */
int len;
char buf[16384];
@ -333,13 +334,13 @@ process_output(fd_set *writeset, int connection_out)
}
static void
process_buffered_input_packets(void)
process_buffered_input_packets(struct ssh *ssh)
{
ssh_dispatch_run_fatal(active_state, DISPATCH_NONBLOCK, NULL);
ssh_dispatch_run_fatal(ssh, DISPATCH_NONBLOCK, NULL);
}
static void
collect_children(void)
collect_children(struct ssh *ssh)
{
pid_t pid;
sigset_t oset, nset;
@ -354,14 +355,14 @@ collect_children(void)
while ((pid = waitpid(-1, &status, WNOHANG)) > 0 ||
(pid < 0 && errno == EINTR))
if (pid > 0)
session_close_by_pid(pid, status);
session_close_by_pid(ssh, pid, status);
child_terminated = 0;
}
sigprocmask(SIG_SETMASK, &oset, NULL);
}
void
server_loop2(Authctxt *authctxt)
server_loop2(struct ssh *ssh, Authctxt *authctxt)
{
fd_set *readset = NULL, *writeset = NULL;
int max_fd;
@ -389,18 +390,17 @@ server_loop2(Authctxt *authctxt)
server_init_dispatch();
for (;;) {
process_buffered_input_packets();
process_buffered_input_packets(ssh);
if (!ssh_packet_is_rekeying(active_state) &&
if (!ssh_packet_is_rekeying(ssh) &&
packet_not_very_much_data_to_write())
channel_output_poll();
if (options.rekey_interval > 0 &&
!ssh_packet_is_rekeying(active_state))
channel_output_poll(ssh);
if (options.rekey_interval > 0 && !ssh_packet_is_rekeying(ssh))
rekey_timeout_ms = packet_get_rekey_timeout() * 1000;
else
rekey_timeout_ms = 0;
wait_until_can_do_something(connection_in, connection_out,
wait_until_can_do_something(ssh, connection_in, connection_out,
&readset, &writeset, &max_fd, &nalloc, rekey_timeout_ms);
if (received_sigterm) {
@ -409,23 +409,23 @@ server_loop2(Authctxt *authctxt)
cleanup_exit(255);
}
collect_children();
if (!ssh_packet_is_rekeying(active_state))
channel_after_select(active_state, readset, writeset);
if (process_input(readset, connection_in) < 0)
collect_children(ssh);
if (!ssh_packet_is_rekeying(ssh))
channel_after_select(ssh, readset, writeset);
if (process_input(ssh, readset, connection_in) < 0)
break;
process_output(writeset, connection_out);
}
collect_children();
collect_children(ssh);
free(readset);
free(writeset);
/* free all channels, no more reads and writes */
channel_free_all();
channel_free_all(ssh);
/* free remaining sessions, e.g. remove wtmp entries */
session_destroy_all(NULL);
session_destroy_all(ssh, NULL);
}
static int
@ -442,7 +442,7 @@ server_input_keep_alive(int type, u_int32_t seq, struct ssh *ssh)
}
static Channel *
server_request_direct_tcpip(int *reason, const char **errmsg)
server_request_direct_tcpip(struct ssh *ssh, int *reason, const char **errmsg)
{
Channel *c = NULL;
char *target, *originator;
@ -460,7 +460,7 @@ server_request_direct_tcpip(int *reason, const char **errmsg)
/* XXX fine grained permissions */
if ((options.allow_tcp_forwarding & FORWARD_LOCAL) != 0 &&
!no_port_forwarding_flag && !options.disable_forwarding) {
c = channel_connect_to_port(target, target_port,
c = channel_connect_to_port(ssh, target, target_port,
"direct-tcpip", "direct-tcpip", reason, errmsg);
} else {
logit("refused local port forward: "
@ -477,7 +477,7 @@ server_request_direct_tcpip(int *reason, const char **errmsg)
}
static Channel *
server_request_direct_streamlocal(void)
server_request_direct_streamlocal(struct ssh *ssh)
{
Channel *c = NULL;
char *target, *originator;
@ -499,7 +499,7 @@ server_request_direct_streamlocal(void)
if ((options.allow_streamlocal_forwarding & FORWARD_LOCAL) != 0 &&
!no_port_forwarding_flag && !options.disable_forwarding &&
(pw->pw_uid == 0 || use_privsep)) {
c = channel_connect_to_path(target,
c = channel_connect_to_path(ssh, target,
"direct-streamlocal@openssh.com", "direct-streamlocal");
} else {
logit("refused streamlocal port forward: "
@ -514,7 +514,7 @@ server_request_direct_streamlocal(void)
}
static Channel *
server_request_tun(void)
server_request_tun(struct ssh *ssh)
{
Channel *c = NULL;
int mode, tun;
@ -544,7 +544,7 @@ server_request_tun(void)
sock = tun_open(tun, mode);
if (sock < 0)
goto done;
c = channel_new("tun", SSH_CHANNEL_OPEN, sock, sock, -1,
c = channel_new(ssh, "tun", SSH_CHANNEL_OPEN, sock, sock, -1,
CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
c->datagram = 1;
#if defined(SSH_TUN_FILTER)
@ -560,7 +560,7 @@ server_request_tun(void)
}
static Channel *
server_request_session(void)
server_request_session(struct ssh *ssh)
{
Channel *c;
@ -578,15 +578,15 @@ server_request_session(void)
* SSH_CHANNEL_LARVAL. Additionally, a callback for handling all
* CHANNEL_REQUEST messages is registered.
*/
c = channel_new("session", SSH_CHANNEL_LARVAL,
c = channel_new(ssh, "session", SSH_CHANNEL_LARVAL,
-1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT,
0, "server-session", 1);
if (session_open(the_authctxt, c->self) != 1) {
debug("session open failed, free channel %d", c->self);
channel_free(c);
channel_free(ssh, c);
return NULL;
}
channel_register_cleanup(c->self, session_close_by_channel, 0);
channel_register_cleanup(ssh, c->self, session_close_by_channel, 0);
return c;
}
@ -608,13 +608,13 @@ server_input_channel_open(int type, u_int32_t seq, struct ssh *ssh)
ctype, rchan, rwindow, rmaxpack);
if (strcmp(ctype, "session") == 0) {
c = server_request_session();
c = server_request_session(ssh);
} else if (strcmp(ctype, "direct-tcpip") == 0) {
c = server_request_direct_tcpip(&reason, &errmsg);
c = server_request_direct_tcpip(ssh, &reason, &errmsg);
} else if (strcmp(ctype, "direct-streamlocal@openssh.com") == 0) {
c = server_request_direct_streamlocal();
c = server_request_direct_streamlocal(ssh);
} else if (strcmp(ctype, "tun@openssh.com") == 0) {
c = server_request_tun();
c = server_request_tun(ssh);
}
if (c != NULL) {
debug("server_input_channel_open: confirm %s", ctype);
@ -645,9 +645,8 @@ server_input_channel_open(int type, u_int32_t seq, struct ssh *ssh)
}
static int
server_input_hostkeys_prove(struct sshbuf **respp)
server_input_hostkeys_prove(struct ssh *ssh, struct sshbuf **respp)
{
struct ssh *ssh = active_state; /* XXX */
struct sshbuf *resp = NULL;
struct sshbuf *sigbuf = NULL;
struct sshkey *key = NULL, *key_pub = NULL, *key_prv = NULL;
@ -750,7 +749,7 @@ server_input_global_request(int type, u_int32_t seq, struct ssh *ssh)
packet_send_debug("Server has disabled port forwarding.");
} else {
/* Start listening on the port */
success = channel_setup_remote_fwd_listener(&fwd,
success = channel_setup_remote_fwd_listener(ssh, &fwd,
&allocated_listen_port, &options.fwd_opts);
}
free(fwd.listen_host);
@ -768,7 +767,7 @@ server_input_global_request(int type, u_int32_t seq, struct ssh *ssh)
debug("%s: cancel-tcpip-forward addr %s port %d", __func__,
fwd.listen_host, fwd.listen_port);
success = channel_cancel_rport_listener(&fwd);
success = channel_cancel_rport_listener(ssh, &fwd);
free(fwd.listen_host);
} else if (strcmp(rtype, "streamlocal-forward@openssh.com") == 0) {
struct Forward fwd;
@ -787,7 +786,7 @@ server_input_global_request(int type, u_int32_t seq, struct ssh *ssh)
"streamlocal forwarding.");
} else {
/* Start listening on the socket */
success = channel_setup_remote_fwd_listener(
success = channel_setup_remote_fwd_listener(ssh,
&fwd, NULL, &options.fwd_opts);
}
free(fwd.listen_path);
@ -799,19 +798,19 @@ server_input_global_request(int type, u_int32_t seq, struct ssh *ssh)
debug("%s: cancel-streamlocal-forward path %s", __func__,
fwd.listen_path);
success = channel_cancel_rport_listener(&fwd);
success = channel_cancel_rport_listener(ssh, &fwd);
free(fwd.listen_path);
} else if (strcmp(rtype, "no-more-sessions@openssh.com") == 0) {
no_more_sessions = 1;
success = 1;
} else if (strcmp(rtype, "hostkeys-prove-00@openssh.com") == 0) {
success = server_input_hostkeys_prove(&resp);
success = server_input_hostkeys_prove(ssh, &resp);
}
if (want_reply) {
packet_start(success ?
SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE);
if (success && resp != NULL)
ssh_packet_put_raw(active_state, sshbuf_ptr(resp),
ssh_packet_put_raw(ssh, sshbuf_ptr(resp),
sshbuf_len(resp));
packet_send();
packet_write_wait();
@ -835,15 +834,15 @@ server_input_channel_req(int type, u_int32_t seq, struct ssh *ssh)
debug("server_input_channel_req: channel %d request %s reply %d",
id, rtype, reply);
if ((c = channel_lookup(id)) == NULL)
if ((c = channel_lookup(ssh, id)) == NULL)
packet_disconnect("server_input_channel_req: "
"unknown channel %d", id);
if (!strcmp(rtype, "eow@openssh.com")) {
packet_check_eom();
chan_rcvd_eow(c);
chan_rcvd_eow(ssh, c);
} else if ((c->type == SSH_CHANNEL_LARVAL ||
c->type == SSH_CHANNEL_OPEN) && strcmp(c->ctype, "session") == 0)
success = session_input_channel_req(c, rtype);
success = session_input_channel_req(ssh, c, rtype);
if (reply && !(c->flags & CHAN_CLOSE_SENT)) {
packet_start(success ?
SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);

6
serverloop.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: serverloop.h,v 1.7 2016/08/13 17:47:41 markus Exp $ */
/* $OpenBSD: serverloop.h,v 1.8 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -21,6 +21,8 @@
#ifndef SERVERLOOP_H
#define SERVERLOOP_H
void server_loop2(Authctxt *);
struct ssh;
void server_loop2(struct ssh *, Authctxt *);
#endif

223
session.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: session.c,v 1.291 2017/08/18 05:36:45 djm Exp $ */
/* $OpenBSD: session.c,v 1.292 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
@ -113,24 +113,24 @@
/* func */
Session *session_new(void);
void session_set_fds(Session *, int, int, int, int, int);
void session_set_fds(struct ssh *, Session *, int, int, int, int, int);
void session_pty_cleanup(Session *);
void session_proctitle(Session *);
int session_setup_x11fwd(Session *);
int do_exec_pty(Session *, const char *);
int do_exec_no_pty(Session *, const char *);
int do_exec(Session *, const char *);
void do_login(Session *, const char *);
int session_setup_x11fwd(struct ssh *, Session *);
int do_exec_pty(struct ssh *, Session *, const char *);
int do_exec_no_pty(struct ssh *, Session *, const char *);
int do_exec(struct ssh *, Session *, const char *);
void do_login(struct ssh *, Session *, const char *);
void do_child(struct ssh *, Session *, const char *);
#ifdef LOGIN_NEEDS_UTMPX
static void do_pre_login(Session *s);
#endif
void do_child(Session *, const char *);
void do_motd(void);
int check_quietlogin(Session *, const char *);
static void do_authenticated2(Authctxt *);
static void do_authenticated2(struct ssh *, Authctxt *);
static int session_pty_req(Session *);
static int session_pty_req(struct ssh *, Session *);
/* import */
extern ServerOptions options;
@ -183,7 +183,7 @@ auth_sock_cleanup_proc(struct passwd *pw)
}
static int
auth_input_request_forwarding(struct passwd * pw)
auth_input_request_forwarding(struct ssh *ssh, struct passwd * pw)
{
Channel *nc;
int sock = -1;
@ -223,7 +223,7 @@ auth_input_request_forwarding(struct passwd * pw)
goto authsock_err;
/* Allocate a channel for the authentication agent socket. */
nc = channel_new("auth socket",
nc = channel_new(ssh, "auth socket",
SSH_CHANNEL_AUTH_SOCKET, sock, sock, -1,
CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
0, "auth socket", 1);
@ -288,7 +288,7 @@ prepare_auth_info_file(struct passwd *pw, struct sshbuf *info)
}
void
do_authenticated(Authctxt *authctxt)
do_authenticated(struct ssh *ssh, Authctxt *authctxt)
{
setproctitle("%s", authctxt->pw->pw_name);
@ -296,17 +296,17 @@ do_authenticated(Authctxt *authctxt)
/* XXX - streamlocal? */
if (no_port_forwarding_flag || options.disable_forwarding ||
(options.allow_tcp_forwarding & FORWARD_LOCAL) == 0)
channel_disable_adm_local_opens();
channel_disable_adm_local_opens(ssh);
else
channel_permit_all_opens();
channel_permit_all_opens(ssh);
auth_debug_send();
prepare_auth_info_file(authctxt->pw, authctxt->session_info);
do_authenticated2(authctxt);
do_authenticated2(ssh, authctxt);
do_cleanup(authctxt);
do_cleanup(ssh, authctxt);
}
/* Check untrusted xauth strings for metacharacters */
@ -331,7 +331,7 @@ xauth_valid_string(const char *s)
* setting up file descriptors and such.
*/
int
do_exec_no_pty(Session *s, const char *command)
do_exec_no_pty(struct ssh *ssh, Session *s, const char *command)
{
pid_t pid;
@ -456,7 +456,7 @@ do_exec_no_pty(Session *s, const char *command)
#endif
/* Do processing for the child (exec command etc). */
do_child(s, command);
do_child(ssh, s, command);
/* NOTREACHED */
default:
break;
@ -487,7 +487,7 @@ do_exec_no_pty(Session *s, const char *command)
close(pout[1]);
close(perr[1]);
session_set_fds(s, pin[1], pout[0], perr[0],
session_set_fds(ssh, s, pin[1], pout[0], perr[0],
s->is_subsystem, 0);
#else
/* We are the parent. Close the child sides of the socket pairs. */
@ -511,7 +511,7 @@ do_exec_no_pty(Session *s, const char *command)
* lastlog, and other such operations.
*/
int
do_exec_pty(Session *s, const char *command)
do_exec_pty(struct ssh *ssh, Session *s, const char *command)
{
int fdout, ptyfd, ttyfd, ptymaster;
pid_t pid;
@ -580,13 +580,13 @@ do_exec_pty(Session *s, const char *command)
cray_init_job(s->pw); /* set up cray jid and tmpdir */
#endif /* _UNICOS */
#ifndef HAVE_OSF_SIA
do_login(s, command);
do_login(ssh, s, command);
#endif
/*
* Do common processing for the child, such as execing
* the command.
*/
do_child(s, command);
do_child(ssh, s, command);
/* NOTREACHED */
default:
break;
@ -608,7 +608,7 @@ do_exec_pty(Session *s, const char *command)
s->ptymaster = ptymaster;
packet_set_interactive(1,
options.ip_qos_interactive, options.ip_qos_bulk);
session_set_fds(s, ptyfd, fdout, -1, 1, 1);
session_set_fds(ssh, s, ptyfd, fdout, -1, 1, 1);
return 0;
}
@ -646,9 +646,8 @@ do_pre_login(Session *s)
* to be forced, execute that instead.
*/
int
do_exec(Session *s, const char *command)
do_exec(struct ssh *ssh, Session *s, const char *command)
{
struct ssh *ssh = active_state; /* XXX */
int ret;
const char *forced = NULL, *tty = NULL;
char session_type[1024];
@ -707,9 +706,9 @@ do_exec(Session *s, const char *command)
}
#endif
if (s->ttyfd != -1)
ret = do_exec_pty(s, command);
ret = do_exec_pty(ssh, s, command);
else
ret = do_exec_no_pty(s, command);
ret = do_exec_no_pty(ssh, s, command);
original_command = NULL;
@ -725,9 +724,8 @@ do_exec(Session *s, const char *command)
/* administrative, login(1)-like work */
void
do_login(Session *s, const char *command)
do_login(struct ssh *ssh, Session *s, const char *command)
{
struct ssh *ssh = active_state; /* XXX */
socklen_t fromlen;
struct sockaddr_storage from;
struct passwd * pw = s->pw;
@ -960,9 +958,8 @@ copy_environment(char **source, char ***env, u_int *envsize)
}
static char **
do_setup_env(Session *s, const char *shell)
do_setup_env(struct ssh *ssh, Session *s, const char *shell)
{
struct ssh *ssh = active_state; /* XXX */
char buf[256];
u_int i, envsize;
char **env, *laddr;
@ -1421,7 +1418,7 @@ do_pwchange(Session *s)
}
static void
child_close_fds(void)
child_close_fds(struct ssh *ssh)
{
extern int auth_sock;
@ -1441,7 +1438,7 @@ child_close_fds(void)
* open in the parent.
*/
/* XXX better use close-on-exec? -markus */
channel_close_all();
channel_close_all(ssh);
/*
* Close any extra file descriptors. Note that there may still be
@ -1465,7 +1462,7 @@ child_close_fds(void)
*/
#define ARGV_MAX 10
void
do_child(Session *s, const char *command)
do_child(struct ssh *ssh, Session *s, const char *command)
{
extern char **environ;
char **env;
@ -1481,7 +1478,7 @@ do_child(Session *s, const char *command)
/* Force a password change */
if (s->authctxt->force_pwchange) {
do_setusercontext(pw);
child_close_fds();
child_close_fds(ssh);
do_pwchange(s);
exit(1);
}
@ -1530,7 +1527,7 @@ do_child(Session *s, const char *command)
* Make sure $SHELL points to the shell from the password file,
* even if shell is overridden from login.conf
*/
env = do_setup_env(s, shell);
env = do_setup_env(ssh, s, shell);
#ifdef HAVE_LOGIN_CAP
shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell);
@ -1543,7 +1540,7 @@ do_child(Session *s, const char *command)
* closed before building the environment, as we call
* ssh_remote_ipaddr there.
*/
child_close_fds();
child_close_fds(ssh);
/*
* Must take new environment into use so that .ssh/rc,
@ -1840,7 +1837,7 @@ session_by_pid(pid_t pid)
}
static int
session_window_change_req(Session *s)
session_window_change_req(struct ssh *ssh, Session *s)
{
s->col = packet_get_int();
s->row = packet_get_int();
@ -1852,7 +1849,7 @@ session_window_change_req(Session *s)
}
static int
session_pty_req(Session *s)
session_pty_req(struct ssh *ssh, Session *s)
{
u_int len;
int n_bytes;
@ -1905,7 +1902,7 @@ session_pty_req(Session *s)
}
static int
session_subsystem_req(Session *s)
session_subsystem_req(struct ssh *ssh, Session *s)
{
struct stat st;
u_int len;
@ -1932,7 +1929,7 @@ session_subsystem_req(Session *s)
s->is_subsystem = SUBSYSTEM_EXT;
debug("subsystem: exec() %s", cmd);
}
success = do_exec(s, cmd) == 0;
success = do_exec(ssh, s, cmd) == 0;
break;
}
}
@ -1945,7 +1942,7 @@ session_subsystem_req(Session *s)
}
static int
session_x11_req(Session *s)
session_x11_req(struct ssh *ssh, Session *s)
{
int success;
@ -1962,7 +1959,7 @@ session_x11_req(Session *s)
if (xauth_valid_string(s->auth_proto) &&
xauth_valid_string(s->auth_data))
success = session_setup_x11fwd(s);
success = session_setup_x11fwd(ssh, s);
else {
success = 0;
error("Invalid X11 forwarding data");
@ -1977,26 +1974,26 @@ session_x11_req(Session *s)
}
static int
session_shell_req(Session *s)
session_shell_req(struct ssh *ssh, Session *s)
{
packet_check_eom();
return do_exec(s, NULL) == 0;
return do_exec(ssh, s, NULL) == 0;
}
static int
session_exec_req(Session *s)
session_exec_req(struct ssh *ssh, Session *s)
{
u_int len, success;
char *command = packet_get_string(&len);
packet_check_eom();
success = do_exec(s, command) == 0;
success = do_exec(ssh, s, command) == 0;
free(command);
return success;
}
static int
session_break_req(Session *s)
session_break_req(struct ssh *ssh, Session *s)
{
packet_get_int(); /* ignored */
@ -2008,7 +2005,7 @@ session_break_req(Session *s)
}
static int
session_env_req(Session *s)
session_env_req(struct ssh *ssh, Session *s)
{
char *name, *val;
u_int name_len, val_len, i;
@ -2043,7 +2040,7 @@ session_env_req(Session *s)
}
static int
session_auth_agent_req(Session *s)
session_auth_agent_req(struct ssh *ssh, Session *s)
{
static int called = 0;
packet_check_eom();
@ -2055,22 +2052,21 @@ session_auth_agent_req(Session *s)
return 0;
} else {
called = 1;
return auth_input_request_forwarding(s->pw);
return auth_input_request_forwarding(ssh, s->pw);
}
}
int
session_input_channel_req(Channel *c, const char *rtype)
session_input_channel_req(struct ssh *ssh, Channel *c, const char *rtype)
{
int success = 0;
Session *s;
if ((s = session_by_channel(c->self)) == NULL) {
logit("session_input_channel_req: no session %d req %.100s",
c->self, rtype);
logit("%s: no session %d req %.100s", __func__, c->self, rtype);
return 0;
}
debug("session_input_channel_req: session %d req %s", s->self, rtype);
debug("%s: session %d req %s", __func__, s->self, rtype);
/*
* a session is in LARVAL state until a shell, a command
@ -2078,33 +2074,33 @@ session_input_channel_req(Channel *c, const char *rtype)
*/
if (c->type == SSH_CHANNEL_LARVAL) {
if (strcmp(rtype, "shell") == 0) {
success = session_shell_req(s);
success = session_shell_req(ssh, s);
} else if (strcmp(rtype, "exec") == 0) {
success = session_exec_req(s);
success = session_exec_req(ssh, s);
} else if (strcmp(rtype, "pty-req") == 0) {
success = session_pty_req(s);
success = session_pty_req(ssh, s);
} else if (strcmp(rtype, "x11-req") == 0) {
success = session_x11_req(s);
success = session_x11_req(ssh, s);
} else if (strcmp(rtype, "auth-agent-req@openssh.com") == 0) {
success = session_auth_agent_req(s);
success = session_auth_agent_req(ssh, s);
} else if (strcmp(rtype, "subsystem") == 0) {
success = session_subsystem_req(s);
success = session_subsystem_req(ssh, s);
} else if (strcmp(rtype, "env") == 0) {
success = session_env_req(s);
success = session_env_req(ssh, s);
}
}
if (strcmp(rtype, "window-change") == 0) {
success = session_window_change_req(s);
success = session_window_change_req(ssh, s);
} else if (strcmp(rtype, "break") == 0) {
success = session_break_req(s);
success = session_break_req(ssh, s);
}
return success;
}
void
session_set_fds(Session *s, int fdin, int fdout, int fderr, int ignore_fderr,
int is_tty)
session_set_fds(struct ssh *ssh, Session *s,
int fdin, int fdout, int fderr, int ignore_fderr, int is_tty)
{
/*
* now that have a child and a pipe to the child,
@ -2112,7 +2108,7 @@ session_set_fds(Session *s, int fdin, int fdout, int fderr, int ignore_fderr,
*/
if (s->chanid == -1)
fatal("no channel for session %d", s->self);
channel_set_fds(s->chanid,
channel_set_fds(ssh, s->chanid,
fdout, fdin, fderr,
ignore_fderr ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
1, is_tty, CHAN_SES_WINDOW_DEFAULT);
@ -2183,40 +2179,40 @@ sig2name(int sig)
}
static void
session_close_x11(int id)
session_close_x11(struct ssh *ssh, int id)
{
Channel *c;
if ((c = channel_by_id(id)) == NULL) {
debug("session_close_x11: x11 channel %d missing", id);
if ((c = channel_by_id(ssh, id)) == NULL) {
debug("%s: x11 channel %d missing", __func__, id);
} else {
/* Detach X11 listener */
debug("session_close_x11: detach x11 channel %d", id);
channel_cancel_cleanup(id);
debug("%s: detach x11 channel %d", __func__, id);
channel_cancel_cleanup(ssh, id);
if (c->ostate != CHAN_OUTPUT_CLOSED)
chan_mark_dead(c);
chan_mark_dead(ssh, c);
}
}
static void
session_close_single_x11(int id, void *arg)
session_close_single_x11(struct ssh *ssh, int id, void *arg)
{
Session *s;
u_int i;
debug3("session_close_single_x11: channel %d", id);
channel_cancel_cleanup(id);
debug3("%s: channel %d", __func__, id);
channel_cancel_cleanup(ssh, id);
if ((s = session_by_x11_channel(id)) == NULL)
fatal("session_close_single_x11: no x11 channel %d", id);
fatal("%s: no x11 channel %d", __func__, id);
for (i = 0; s->x11_chanids[i] != -1; i++) {
debug("session_close_single_x11: session %d: "
"closing channel %d", s->self, s->x11_chanids[i]);
debug("%s: session %d: closing channel %d",
__func__, s->self, s->x11_chanids[i]);
/*
* The channel "id" is already closing, but make sure we
* close all of its siblings.
*/
if (s->x11_chanids[i] != id)
session_close_x11(s->x11_chanids[i]);
session_close_x11(ssh, s->x11_chanids[i]);
}
free(s->x11_chanids);
s->x11_chanids = NULL;
@ -2231,22 +2227,22 @@ session_close_single_x11(int id, void *arg)
}
static void
session_exit_message(Session *s, int status)
session_exit_message(struct ssh *ssh, Session *s, int status)
{
Channel *c;
if ((c = channel_lookup(s->chanid)) == NULL)
fatal("session_exit_message: session %d: no channel %d",
s->self, s->chanid);
debug("session_exit_message: session %d channel %d pid %ld",
s->self, s->chanid, (long)s->pid);
if ((c = channel_lookup(ssh, s->chanid)) == NULL)
fatal("%s: session %d: no channel %d",
__func__, s->self, s->chanid);
debug("%s: session %d channel %d pid %ld",
__func__, s->self, s->chanid, (long)s->pid);
if (WIFEXITED(status)) {
channel_request_start(s->chanid, "exit-status", 0);
channel_request_start(ssh, s->chanid, "exit-status", 0);
packet_put_int(WEXITSTATUS(status));
packet_send();
} else if (WIFSIGNALED(status)) {
channel_request_start(s->chanid, "exit-signal", 0);
channel_request_start(ssh, s->chanid, "exit-signal", 0);
packet_put_cstring(sig2name(WTERMSIG(status)));
#ifdef WCOREDUMP
packet_put_char(WCOREDUMP(status)? 1 : 0);
@ -2262,14 +2258,14 @@ session_exit_message(Session *s, int status)
}
/* disconnect channel */
debug("session_exit_message: release channel %d", s->chanid);
debug("%s: release channel %d", __func__, s->chanid);
/*
* Adjust cleanup callback attachment to send close messages when
* the channel gets EOF. The session will be then be closed
* by session_close_by_channel when the childs close their fds.
*/
channel_register_cleanup(c->self, session_close_by_channel, 1);
channel_register_cleanup(ssh, c->self, session_close_by_channel, 1);
/*
* emulate a write failure with 'chan_write_failed', nobody will be
@ -2278,13 +2274,12 @@ session_exit_message(Session *s, int status)
* be some more data waiting in the pipe.
*/
if (c->ostate != CHAN_OUTPUT_CLOSED)
chan_write_failed(c);
chan_write_failed(ssh, c);
}
void
session_close(Session *s)
session_close(struct ssh *ssh, Session *s)
{
struct ssh *ssh = active_state; /* XXX */
u_int i;
verbose("Close session: user %s from %.200s port %d id %d",
@ -2314,16 +2309,15 @@ session_close(Session *s)
}
void
session_close_by_pid(pid_t pid, int status)
session_close_by_pid(struct ssh *ssh, pid_t pid, int status)
{
Session *s = session_by_pid(pid);
if (s == NULL) {
debug("session_close_by_pid: no session for pid %ld",
(long)pid);
debug("%s: no session for pid %ld", __func__, (long)pid);
return;
}
if (s->chanid != -1)
session_exit_message(s, status);
session_exit_message(ssh, s, status);
if (s->ttyfd != -1)
session_pty_cleanup(s);
s->pid = 0;
@ -2334,19 +2328,18 @@ session_close_by_pid(pid_t pid, int status)
* the session 'child' itself dies
*/
void
session_close_by_channel(int id, void *arg)
session_close_by_channel(struct ssh *ssh, int id, void *arg)
{
Session *s = session_by_channel(id);
u_int i;
if (s == NULL) {
debug("session_close_by_channel: no session for id %d", id);
debug("%s: no session for id %d", __func__, id);
return;
}
debug("session_close_by_channel: channel %d child %ld",
id, (long)s->pid);
debug("%s: channel %d child %ld", __func__, id, (long)s->pid);
if (s->pid != 0) {
debug("session_close_by_channel: channel %d: has child", id);
debug("%s: channel %d: has child", __func__, id);
/*
* delay detach of session, but release pty, since
* the fd's to the child are already closed
@ -2356,22 +2349,22 @@ session_close_by_channel(int id, void *arg)
return;
}
/* detach by removing callback */
channel_cancel_cleanup(s->chanid);
channel_cancel_cleanup(ssh, s->chanid);
/* Close any X11 listeners associated with this session */
if (s->x11_chanids != NULL) {
for (i = 0; s->x11_chanids[i] != -1; i++) {
session_close_x11(s->x11_chanids[i]);
session_close_x11(ssh, s->x11_chanids[i]);
s->x11_chanids[i] = -1;
}
}
s->chanid = -1;
session_close(s);
session_close(ssh, s);
}
void
session_destroy_all(void (*closefunc)(Session *))
session_destroy_all(struct ssh *ssh, void (*closefunc)(Session *))
{
int i;
for (i = 0; i < sessions_nalloc; i++) {
@ -2380,7 +2373,7 @@ session_destroy_all(void (*closefunc)(Session *))
if (closefunc != NULL)
closefunc(s);
else
session_close(s);
session_close(ssh, s);
}
}
}
@ -2423,7 +2416,7 @@ session_proctitle(Session *s)
}
int
session_setup_x11fwd(Session *s)
session_setup_x11fwd(struct ssh *ssh, Session *s)
{
struct stat st;
char display[512], auth_display[512];
@ -2447,14 +2440,14 @@ session_setup_x11fwd(Session *s)
debug("X11 display already set.");
return 0;
}
if (x11_create_display_inet(options.x11_display_offset,
if (x11_create_display_inet(ssh, options.x11_display_offset,
options.x11_use_localhost, s->single_connection,
&s->display_number, &s->x11_chanids) == -1) {
debug("x11_create_display_inet failed.");
return 0;
}
for (i = 0; s->x11_chanids[i] != -1; i++) {
channel_register_cleanup(s->x11_chanids[i],
channel_register_cleanup(ssh, s->x11_chanids[i],
session_close_single_x11, 0);
}
@ -2499,13 +2492,13 @@ session_setup_x11fwd(Session *s)
}
static void
do_authenticated2(Authctxt *authctxt)
do_authenticated2(struct ssh *ssh, Authctxt *authctxt)
{
server_loop2(authctxt);
server_loop2(ssh, authctxt);
}
void
do_cleanup(Authctxt *authctxt)
do_cleanup(struct ssh *ssh, Authctxt *authctxt)
{
static int called = 0;
@ -2561,7 +2554,7 @@ do_cleanup(Authctxt *authctxt)
* or if running in monitor.
*/
if (!use_privsep || mm_is_monitor())
session_destroy_all(session_pty_cleanup2);
session_destroy_all(ssh, session_pty_cleanup2);
}
/* Return a name for the remote host that fits inside utmp_size */

16
session.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: session.h,v 1.34 2017/08/18 05:36:45 djm Exp $ */
/* $OpenBSD: session.h,v 1.35 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
@ -62,20 +62,20 @@ struct Session {
} *env;
};
void do_authenticated(Authctxt *);
void do_cleanup(Authctxt *);
void do_authenticated(struct ssh *, Authctxt *);
void do_cleanup(struct ssh *, Authctxt *);
int session_open(Authctxt *, int);
void session_unused(int);
int session_input_channel_req(Channel *, const char *);
void session_close_by_pid(pid_t, int);
void session_close_by_channel(int, void *);
void session_destroy_all(void (*)(Session *));
int session_input_channel_req(struct ssh *, Channel *, const char *);
void session_close_by_pid(struct ssh *ssh, pid_t, int);
void session_close_by_channel(struct ssh *, int, void *);
void session_destroy_all(struct ssh *, void (*)(Session *));
void session_pty_cleanup2(Session *);
Session *session_new(void);
Session *session_by_tty(char *);
void session_close(Session *);
void session_close(struct ssh *, Session *);
void do_setusercontext(struct passwd *);
const char *session_get_remote_name_or_ip(struct ssh *, u_int, int);

88
ssh.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh.c,v 1.462 2017/08/12 06:46:01 djm Exp $ */
/* $OpenBSD: ssh.c,v 1.463 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -208,7 +208,7 @@ usage(void)
exit(255);
}
static int ssh_session2(void);
static int ssh_session2(struct ssh *);
static void load_public_identity_files(void);
static void main_sigchld_handler(int);
@ -596,6 +596,14 @@ main(int ac, char **av)
*/
initialize_options(&options);
/*
* Prepare main ssh transport/connection structures
*/
if ((ssh = ssh_alloc_session_state()) == NULL)
fatal("Couldn't allocate session state");
channel_init_channels(ssh);
active_state = ssh; /* XXX legacy API compat */
/* Parse command-line arguments. */
host = NULL;
use_syslog = 0;
@ -1108,7 +1116,7 @@ main(int ac, char **av)
if (options.port == 0)
options.port = default_ssh_port();
channel_set_af(options.address_family);
channel_set_af(ssh, options.address_family);
/* Tidy and check options */
if (options.host_key_alias != NULL)
@ -1253,8 +1261,7 @@ main(int ac, char **av)
if (options.control_path != NULL) {
int sock;
if ((sock = muxclient(options.control_path)) >= 0) {
packet_set_connection(sock, sock);
ssh = active_state; /* XXX */
ssh_packet_set_connection(ssh, sock, sock);
packet_set_mux();
goto skip_connect;
}
@ -1274,7 +1281,7 @@ main(int ac, char **av)
timeout_ms = options.connection_timeout * 1000;
/* Open a connection to the remote host. */
if (ssh_connect(host, addrs, &hostaddr, options.port,
if (ssh_connect(ssh, host, addrs, &hostaddr, options.port,
options.address_family, options.connection_attempts,
&timeout_ms, options.tcp_keep_alive,
options.use_privileged_port) != 0)
@ -1457,7 +1464,7 @@ main(int ac, char **av)
}
skip_connect:
exit_status = ssh_session2();
exit_status = ssh_session2(ssh);
packet_close();
if (options.control_path != NULL && muxserver_sock != -1)
@ -1530,7 +1537,7 @@ fork_postauth(void)
/* Callback for remote forward global requests */
static void
ssh_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
ssh_confirm_remote_forward(struct ssh *ssh, int type, u_int32_t seq, void *ctxt)
{
struct Forward *rfwd = (struct Forward *)ctxt;
@ -1548,10 +1555,10 @@ ssh_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
logit("Allocated port %u for remote forward to %s:%d",
rfwd->allocated_port,
rfwd->connect_host, rfwd->connect_port);
channel_update_permitted_opens(rfwd->handle,
rfwd->allocated_port);
channel_update_permitted_opens(ssh,
rfwd->handle, rfwd->allocated_port);
} else {
channel_update_permitted_opens(rfwd->handle, -1);
channel_update_permitted_opens(ssh, rfwd->handle, -1);
}
}
@ -1580,21 +1587,21 @@ ssh_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
}
static void
client_cleanup_stdio_fwd(int id, void *arg)
client_cleanup_stdio_fwd(struct ssh *ssh, int id, void *arg)
{
debug("stdio forwarding: done");
cleanup_exit(0);
}
static void
ssh_stdio_confirm(int id, int success, void *arg)
ssh_stdio_confirm(struct ssh *ssh, int id, int success, void *arg)
{
if (!success)
fatal("stdio forwarding failed");
}
static void
ssh_init_stdio_forwarding(void)
ssh_init_stdio_forwarding(struct ssh *ssh)
{
Channel *c;
int in, out;
@ -1608,15 +1615,15 @@ ssh_init_stdio_forwarding(void)
if ((in = dup(STDIN_FILENO)) < 0 ||
(out = dup(STDOUT_FILENO)) < 0)
fatal("channel_connect_stdio_fwd: dup() in/out failed");
if ((c = channel_connect_stdio_fwd(options.stdio_forward_host,
if ((c = channel_connect_stdio_fwd(ssh, options.stdio_forward_host,
options.stdio_forward_port, in, out)) == NULL)
fatal("%s: channel_connect_stdio_fwd failed", __func__);
channel_register_cleanup(c->self, client_cleanup_stdio_fwd, 0);
channel_register_open_confirm(c->self, ssh_stdio_confirm, NULL);
channel_register_cleanup(ssh, c->self, client_cleanup_stdio_fwd, 0);
channel_register_open_confirm(ssh, c->self, ssh_stdio_confirm, NULL);
}
static void
ssh_init_forwarding(void)
ssh_init_forwarding(struct ssh *ssh)
{
int success = 0;
int i;
@ -1635,7 +1642,7 @@ ssh_init_forwarding(void)
options.local_forwards[i].connect_path :
options.local_forwards[i].connect_host,
options.local_forwards[i].connect_port);
success += channel_setup_local_fwd_listener(
success += channel_setup_local_fwd_listener(ssh,
&options.local_forwards[i], &options.fwd_opts);
}
if (i > 0 && success != i && options.exit_on_forward_failure)
@ -1657,7 +1664,7 @@ ssh_init_forwarding(void)
options.remote_forwards[i].connect_host,
options.remote_forwards[i].connect_port);
options.remote_forwards[i].handle =
channel_request_remote_forwarding(
channel_request_remote_forwarding(ssh,
&options.remote_forwards[i]);
if (options.remote_forwards[i].handle < 0) {
if (options.exit_on_forward_failure)
@ -1666,14 +1673,15 @@ ssh_init_forwarding(void)
logit("Warning: Could not request remote "
"forwarding.");
} else {
client_register_global_confirm(ssh_confirm_remote_forward,
client_register_global_confirm(
ssh_confirm_remote_forward,
&options.remote_forwards[i]);
}
}
/* Initiate tunnel forwarding. */
if (options.tun_open != SSH_TUNMODE_NO) {
if (client_request_tun_fwd(options.tun_open,
if (client_request_tun_fwd(ssh, options.tun_open,
options.tun_local, options.tun_remote) == -1) {
if (options.exit_on_forward_failure)
fatal("Could not request tunnel forwarding.");
@ -1700,7 +1708,7 @@ check_agent_present(void)
}
static void
ssh_session2_setup(int id, int success, void *arg)
ssh_session2_setup(struct ssh *ssh, int id, int success, void *arg)
{
extern char **environ;
const char *display;
@ -1713,15 +1721,15 @@ ssh_session2_setup(int id, int success, void *arg)
display = getenv("DISPLAY");
if (display == NULL && options.forward_x11)
debug("X11 forwarding requested but DISPLAY not set");
if (options.forward_x11 && client_x11_get_proto(display,
if (options.forward_x11 && client_x11_get_proto(ssh, display,
options.xauth_location, options.forward_x11_trusted,
options.forward_x11_timeout, &proto, &data) == 0) {
/* Request forwarding with authentication spoofing. */
debug("Requesting X11 forwarding with authentication "
"spoofing.");
x11_request_forwarding_with_spoofing(id, display, proto,
x11_request_forwarding_with_spoofing(ssh, id, display, proto,
data, 1);
client_expect_confirm(id, "X11 forwarding", CONFIRM_WARN);
client_expect_confirm(ssh, id, "X11 forwarding", CONFIRM_WARN);
/* XXX exit_on_forward_failure */
interactive = 1;
}
@ -1729,7 +1737,7 @@ ssh_session2_setup(int id, int success, void *arg)
check_agent_present();
if (options.forward_agent) {
debug("Requesting authentication agent forwarding.");
channel_request_start(id, "auth-agent-req@openssh.com", 0);
channel_request_start(ssh, id, "auth-agent-req@openssh.com", 0);
packet_send();
}
@ -1737,13 +1745,13 @@ ssh_session2_setup(int id, int success, void *arg)
packet_set_interactive(interactive,
options.ip_qos_interactive, options.ip_qos_bulk);
client_session2_setup(id, tty_flag, subsystem_flag, getenv("TERM"),
client_session2_setup(ssh, id, tty_flag, subsystem_flag, getenv("TERM"),
NULL, fileno(stdin), &command, environ);
}
/* open new channel for a session */
static int
ssh_session2_open(void)
ssh_session2_open(struct ssh *ssh)
{
Channel *c;
int window, packetmax, in, out, err;
@ -1773,34 +1781,34 @@ ssh_session2_open(void)
window >>= 1;
packetmax >>= 1;
}
c = channel_new(
c = channel_new(ssh,
"session", SSH_CHANNEL_OPENING, in, out, err,
window, packetmax, CHAN_EXTENDED_WRITE,
"client-session", /*nonblock*/0);
debug3("ssh_session2_open: channel_new: %d", c->self);
debug3("%s: channel_new: %d", __func__, c->self);
channel_send_open(c->self);
channel_send_open(ssh, c->self);
if (!no_shell_flag)
channel_register_open_confirm(c->self,
channel_register_open_confirm(ssh, c->self,
ssh_session2_setup, NULL);
return c->self;
}
static int
ssh_session2(void)
ssh_session2(struct ssh *ssh)
{
int id = -1;
/* XXX should be pre-session */
if (!options.control_persist)
ssh_init_stdio_forwarding();
ssh_init_forwarding();
ssh_init_stdio_forwarding(ssh);
ssh_init_forwarding(ssh);
/* Start listening for multiplex clients */
if (!packet_get_mux())
muxserver_listen();
muxserver_listen(ssh);
/*
* If we are in control persist mode and have a working mux listen
@ -1828,10 +1836,10 @@ ssh_session2(void)
* stdio forward setup that we skipped earlier.
*/
if (options.control_persist && muxserver_sock == -1)
ssh_init_stdio_forwarding();
ssh_init_stdio_forwarding(ssh);
if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN))
id = ssh_session2_open();
id = ssh_session2_open(ssh);
else {
packet_set_interactive(
options.control_master == SSHCTL_MASTER_NO,
@ -1866,7 +1874,7 @@ ssh_session2(void)
fork_postauth();
}
return client_loop(tty_flag, tty_flag ?
return client_loop(ssh, tty_flag, tty_flag ?
options.escape_char : SSH_ESCAPECHAR_NONE, id);
}

3
sshbuf.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshbuf.h,v 1.8 2016/11/25 23:22:04 djm Exp $ */
/* $OpenBSD: sshbuf.h,v 1.9 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright (c) 2011 Damien Miller
*
@ -211,6 +211,7 @@ int sshbuf_get_string_direct(struct sshbuf *buf, const u_char **valp,
/* Another variant: "peeks" into the buffer without modifying it */
int sshbuf_peek_string_direct(const struct sshbuf *buf, const u_char **valp,
size_t *lenp);
/* XXX peek_u8 / peek_u32 */
/*
* Functions to extract or store SSH wire encoded bignums and elliptic

38
sshconnect.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshconnect.c,v 1.285 2017/09/03 23:33:13 djm Exp $ */
/* $OpenBSD: sshconnect.c,v 1.286 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -105,7 +105,7 @@ expand_proxy_command(const char *proxy_command, const char *user,
* a connected fd back to us.
*/
static int
ssh_proxy_fdpass_connect(const char *host, u_short port,
ssh_proxy_fdpass_connect(struct ssh *ssh, const char *host, u_short port,
const char *proxy_command)
{
char *command_string;
@ -176,7 +176,8 @@ ssh_proxy_fdpass_connect(const char *host, u_short port,
fatal("Couldn't wait for child: %s", strerror(errno));
/* Set the connection file descriptors. */
packet_set_connection(sock, sock);
if (ssh_packet_set_connection(ssh, sock, sock) == NULL)
return -1; /* ssh_packet_set_connection logs error */
return 0;
}
@ -185,7 +186,8 @@ ssh_proxy_fdpass_connect(const char *host, u_short port,
* Connect to the given ssh server using a proxy command.
*/
static int
ssh_proxy_connect(const char *host, u_short port, const char *proxy_command)
ssh_proxy_connect(struct ssh *ssh, const char *host, u_short port,
const char *proxy_command)
{
char *command_string;
int pin[2], pout[2];
@ -252,9 +254,9 @@ ssh_proxy_connect(const char *host, u_short port, const char *proxy_command)
free(command_string);
/* Set the connection file descriptors. */
packet_set_connection(pout[0], pin[1]);
if (ssh_packet_set_connection(ssh, pout[0], pin[1]) == NULL)
return -1; /* ssh_packet_set_connection logs error */
/* Indicate OK return */
return 0;
}
@ -410,7 +412,7 @@ timeout_connect(int sockfd, const struct sockaddr *serv_addr,
* the daemon.
*/
static int
ssh_connect_direct(const char *host, struct addrinfo *aitop,
ssh_connect_direct(struct ssh *ssh, const char *host, struct addrinfo *aitop,
struct sockaddr_storage *hostaddr, u_short port, int family,
int connection_attempts, int *timeout_ms, int want_keepalive, int needpriv)
{
@ -484,27 +486,31 @@ ssh_connect_direct(const char *host, struct addrinfo *aitop,
error("setsockopt SO_KEEPALIVE: %.100s", strerror(errno));
/* Set the connection. */
packet_set_connection(sock, sock);
if (ssh_packet_set_connection(ssh, sock, sock) == NULL)
return -1; /* ssh_packet_set_connection logs error */
return 0;
return 0;
}
int
ssh_connect(const char *host, struct addrinfo *addrs,
ssh_connect(struct ssh *ssh, const char *host, struct addrinfo *addrs,
struct sockaddr_storage *hostaddr, u_short port, int family,
int connection_attempts, int *timeout_ms, int want_keepalive, int needpriv)
{
if (options.proxy_command == NULL) {
return ssh_connect_direct(host, addrs, hostaddr, port, family,
connection_attempts, timeout_ms, want_keepalive, needpriv);
return ssh_connect_direct(ssh, host, addrs, hostaddr, port,
family, connection_attempts, timeout_ms, want_keepalive,
needpriv);
} else if (strcmp(options.proxy_command, "-") == 0) {
packet_set_connection(STDIN_FILENO, STDOUT_FILENO);
return 0; /* Always succeeds */
if ((ssh_packet_set_connection(ssh,
STDIN_FILENO, STDOUT_FILENO)) == NULL)
return -1; /* ssh_packet_set_connection logs error */
return 0;
} else if (options.proxy_use_fdpass) {
return ssh_proxy_fdpass_connect(host, port,
return ssh_proxy_fdpass_connect(ssh, host, port,
options.proxy_command);
}
return ssh_proxy_connect(host, port, options.proxy_command);
return ssh_proxy_connect(ssh, host, port, options.proxy_command);
}
static void

8
sshconnect.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshconnect.h,v 1.30 2017/05/30 08:52:19 markus Exp $ */
/* $OpenBSD: sshconnect.h,v 1.31 2017/09/12 06:32:07 djm Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
@ -32,8 +32,10 @@ struct Sensitive {
};
struct addrinfo;
int ssh_connect(const char *, struct addrinfo *, struct sockaddr_storage *,
u_short, int, int, int *, int, int);
struct ssh;
int ssh_connect(struct ssh *, const char *, struct addrinfo *,
struct sockaddr_storage *, u_short, int, int, int *, int, int);
void ssh_kill_proxy_command(void);
void ssh_login(Sensitive *, const char *, struct sockaddr *, u_short,

19
sshd.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshd.c,v 1.491 2017/07/01 13:50:45 djm Exp $ */
/* $OpenBSD: sshd.c,v 1.492 2017/09/12 06:32:07 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -1621,9 +1621,6 @@ main(int ac, char **av)
"enabled authentication methods");
}
/* set default channel AF */
channel_set_af(options.address_family);
/* Check that there are no remaining arguments. */
if (optind < ac) {
fprintf(stderr, "Extra argument %s.\n", av[optind]);
@ -1955,8 +1952,14 @@ main(int ac, char **av)
packet_set_connection(sock_in, sock_out);
packet_set_server();
ssh = active_state; /* XXX */
check_ip_options(ssh);
/* Prepare the channels layer */
channel_init_channels(ssh);
channel_set_af(ssh, options.address_family);
process_permitopen(ssh, &options);
/* Set SO_KEEPALIVE if requested. */
if (options.tcp_keep_alive && packet_connection_is_on_socket() &&
setsockopt(sock_in, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)) < 0)
@ -2080,10 +2083,10 @@ main(int ac, char **av)
options.client_alive_count_max);
/* Try to send all our hostkeys to the client */
notify_hostkeys(active_state);
notify_hostkeys(ssh);
/* Start session. */
do_authenticated(authctxt);
do_authenticated(ssh, authctxt);
/* The connection has been terminated. */
packet_get_bytes(&ibytes, &obytes);
@ -2211,8 +2214,10 @@ do_ssh2_kex(void)
void
cleanup_exit(int i)
{
struct ssh *ssh = active_state; /* XXX */
if (the_authctxt) {
do_cleanup(the_authctxt);
do_cleanup(ssh, the_authctxt);
if (use_privsep && privsep_is_preauth &&
pmonitor != NULL && pmonitor->m_pid > 1) {
debug("Killing privsep child %d", pmonitor->m_pid);

4
ssherr.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssherr.c,v 1.6 2017/05/07 23:15:59 djm Exp $ */
/* $OpenBSD: ssherr.c,v 1.7 2017/09/12 06:32:08 djm Exp $ */
/*
* Copyright (c) 2011 Damien Miller
*
@ -137,6 +137,8 @@ ssh_err(int n)
return "Protocol error";
case SSH_ERR_KEY_LENGTH:
return "Invalid key length";
case SSH_ERR_NUMBER_TOO_LARGE:
return "number is too large";
default:
return "unknown error";
}

3
ssherr.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssherr.h,v 1.4 2017/05/07 23:15:59 djm Exp $ */
/* $OpenBSD: ssherr.h,v 1.5 2017/09/12 06:32:08 djm Exp $ */
/*
* Copyright (c) 2011 Damien Miller
*
@ -78,6 +78,7 @@
#define SSH_ERR_CONN_CORRUPT -54
#define SSH_ERR_PROTOCOL_ERROR -55
#define SSH_ERR_KEY_LENGTH -56
#define SSH_ERR_NUMBER_TOO_LARGE -57
/* Translate a numeric error code to a human-readable error string */
const char *ssh_err(int n);