version 1.131, 2004/09/07 23:41:30 |
version 1.131.2.1, 2005/03/10 16:28:27 |
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static void |
static void |
client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) |
client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) |
{ |
{ |
struct winsize oldws, newws; |
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/* Flush stdout and stderr buffers. */ |
/* Flush stdout and stderr buffers. */ |
if (buffer_len(bout) > 0) |
if (buffer_len(bout) > 0) |
atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout)); |
atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout)); |
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buffer_free(bout); |
buffer_free(bout); |
buffer_free(berr); |
buffer_free(berr); |
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/* Save old window size. */ |
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ioctl(fileno(stdin), TIOCGWINSZ, &oldws); |
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/* Send the suspend signal to the program itself. */ |
/* Send the suspend signal to the program itself. */ |
kill(getpid(), SIGTSTP); |
kill(getpid(), SIGTSTP); |
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/* Check if the window size has changed. */ |
/* Reset window sizes in case they have changed */ |
if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 && |
received_window_change_signal = 1; |
(oldws.ws_row != newws.ws_row || |
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oldws.ws_col != newws.ws_col || |
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oldws.ws_xpixel != newws.ws_xpixel || |
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oldws.ws_ypixel != newws.ws_ypixel)) |
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received_window_change_signal = 1; |
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/* OK, we have been continued by the user. Reinitialize buffers. */ |
/* OK, we have been continued by the user. Reinitialize buffers. */ |
buffer_init(bin); |
buffer_init(bin); |
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struct sockaddr_storage addr; |
struct sockaddr_storage addr; |
struct confirm_ctx *cctx; |
struct confirm_ctx *cctx; |
char *cmd; |
char *cmd; |
u_int len, env_len; |
u_int len, env_len, command, flags; |
uid_t euid; |
uid_t euid; |
gid_t egid; |
gid_t egid; |
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return; |
return; |
} |
} |
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allowed = 1; |
unset_nonblock(client_fd); |
if (options.control_master == 2) { |
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char *p, prompt[1024]; |
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allowed = 0; |
/* Read command */ |
snprintf(prompt, sizeof(prompt), |
buffer_init(&m); |
"Allow shared connection to %s? ", host); |
if (ssh_msg_recv(client_fd, &m) == -1) { |
p = read_passphrase(prompt, RP_USE_ASKPASS|RP_ALLOW_EOF); |
error("%s: client msg_recv failed", __func__); |
if (p != NULL) { |
close(client_fd); |
/* |
buffer_free(&m); |
* Accept empty responses and responses consisting |
return; |
* of the word "yes" as affirmative. |
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*/ |
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if (*p == '\0' || *p == '\n' || |
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strcasecmp(p, "yes") == 0) |
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allowed = 1; |
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xfree(p); |
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} |
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} |
} |
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if ((ver = buffer_get_char(&m)) != 1) { |
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error("%s: wrong client version %d", __func__, ver); |
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buffer_free(&m); |
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close(client_fd); |
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return; |
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} |
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unset_nonblock(client_fd); |
allowed = 1; |
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command = buffer_get_int(&m); |
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flags = buffer_get_int(&m); |
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buffer_init(&m); |
buffer_clear(&m); |
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switch (command) { |
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case SSHMUX_COMMAND_OPEN: |
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if (options.control_master == 2) |
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allowed = ask_permission("Allow shared connection " |
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"to %s? ", host); |
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/* continue below */ |
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break; |
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case SSHMUX_COMMAND_TERMINATE: |
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if (options.control_master == 2) |
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allowed = ask_permission("Terminate shared connection " |
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"to %s? ", host); |
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if (allowed) |
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quit_pending = 1; |
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/* FALLTHROUGH */ |
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case SSHMUX_COMMAND_ALIVE_CHECK: |
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/* Reply for SSHMUX_COMMAND_TERMINATE and ALIVE_CHECK */ |
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buffer_clear(&m); |
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buffer_put_int(&m, allowed); |
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buffer_put_int(&m, getpid()); |
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if (ssh_msg_send(client_fd, /* version */1, &m) == -1) { |
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error("%s: client msg_send failed", __func__); |
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close(client_fd); |
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buffer_free(&m); |
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return; |
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} |
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buffer_free(&m); |
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close(client_fd); |
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return; |
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default: |
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error("Unsupported command %d", command); |
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buffer_free(&m); |
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close(client_fd); |
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return; |
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} |
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/* Reply for SSHMUX_COMMAND_OPEN */ |
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buffer_clear(&m); |
buffer_put_int(&m, allowed); |
buffer_put_int(&m, allowed); |
buffer_put_int(&m, getpid()); |
buffer_put_int(&m, getpid()); |
if (ssh_msg_send(client_fd, /* version */0, &m) == -1) { |
if (ssh_msg_send(client_fd, /* version */1, &m) == -1) { |
error("%s: client msg_send failed", __func__); |
error("%s: client msg_send failed", __func__); |
close(client_fd); |
close(client_fd); |
buffer_free(&m); |
buffer_free(&m); |
return; |
return; |
} |
} |
buffer_clear(&m); |
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if (!allowed) { |
if (!allowed) { |
error("Refused control connection"); |
error("Refused control connection"); |
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return; |
return; |
} |
} |
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buffer_clear(&m); |
if (ssh_msg_recv(client_fd, &m) == -1) { |
if (ssh_msg_recv(client_fd, &m) == -1) { |
error("%s: client msg_recv failed", __func__); |
error("%s: client msg_recv failed", __func__); |
close(client_fd); |
close(client_fd); |
buffer_free(&m); |
buffer_free(&m); |
return; |
return; |
} |
} |
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if ((ver = buffer_get_char(&m)) != 1) { |
if ((ver = buffer_get_char(&m)) != 0) { |
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error("%s: wrong client version %d", __func__, ver); |
error("%s: wrong client version %d", __func__, ver); |
buffer_free(&m); |
buffer_free(&m); |
close(client_fd); |
close(client_fd); |
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cctx = xmalloc(sizeof(*cctx)); |
cctx = xmalloc(sizeof(*cctx)); |
memset(cctx, 0, sizeof(*cctx)); |
memset(cctx, 0, sizeof(*cctx)); |
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cctx->want_tty = (flags & SSHMUX_FLAG_TTY) != 0; |
cctx->want_tty = buffer_get_int(&m); |
cctx->want_subsys = (flags & SSHMUX_FLAG_SUBSYS) != 0; |
cctx->want_subsys = buffer_get_int(&m); |
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cctx->term = buffer_get_string(&m, &len); |
cctx->term = buffer_get_string(&m, &len); |
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cmd = buffer_get_string(&m, &len); |
cmd = buffer_get_string(&m, &len); |
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if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1) |
if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1) |
error("%s: tcgetattr: %s", __func__, strerror(errno)); |
error("%s: tcgetattr: %s", __func__, strerror(errno)); |
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/* This roundtrip is just for synchronisation of ttymodes */ |
buffer_clear(&m); |
buffer_clear(&m); |
if (ssh_msg_send(client_fd, /* version */0, &m) == -1) { |
if (ssh_msg_send(client_fd, /* version */1, &m) == -1) { |
error("%s: client msg_send failed", __func__); |
error("%s: client msg_send failed", __func__); |
close(client_fd); |
close(client_fd); |
close(new_fd[0]); |
close(new_fd[0]); |
close(new_fd[1]); |
close(new_fd[1]); |
close(new_fd[2]); |
close(new_fd[2]); |
buffer_free(&m); |
buffer_free(&m); |
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xfree(cctx->term); |
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if (env_len != 0) { |
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for (i = 0; i < env_len; i++) |
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xfree(cctx->env[i]); |
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xfree(cctx->env); |
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} |
return; |
return; |
} |
} |
buffer_free(&m); |
buffer_free(&m); |
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process_cmdline(void) |
process_cmdline(void) |
{ |
{ |
void (*handler)(int); |
void (*handler)(int); |
char *s, *cmd; |
char *s, *cmd, *cancel_host; |
u_short fwd_port, fwd_host_port; |
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char buf[1024], sfwd_port[6], sfwd_host_port[6]; |
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int delete = 0; |
int delete = 0; |
int local = 0; |
int local = 0; |
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u_short cancel_port; |
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Forward fwd; |
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leave_raw_mode(); |
leave_raw_mode(); |
handler = signal(SIGINT, SIG_IGN); |
handler = signal(SIGINT, SIG_IGN); |
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s++; |
s++; |
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if (delete) { |
if (delete) { |
if (sscanf(s, "%5[0-9]", sfwd_host_port) != 1) { |
cancel_port = 0; |
logit("Bad forwarding specification."); |
cancel_host = hpdelim(&s); /* may be NULL */ |
goto out; |
if (s != NULL) { |
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cancel_port = a2port(s); |
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cancel_host = cleanhostname(cancel_host); |
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} else { |
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cancel_port = a2port(cancel_host); |
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cancel_host = NULL; |
} |
} |
if ((fwd_host_port = a2port(sfwd_host_port)) == 0) { |
if (cancel_port == 0) { |
logit("Bad forwarding port(s)."); |
logit("Bad forwarding close port"); |
goto out; |
goto out; |
} |
} |
channel_request_rforward_cancel(fwd_host_port); |
channel_request_rforward_cancel(cancel_host, cancel_port); |
} else { |
} else { |
if (sscanf(s, "%5[0-9]:%255[^:]:%5[0-9]", |
if (!parse_forward(&fwd, s)) { |
sfwd_port, buf, sfwd_host_port) != 3 && |
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sscanf(s, "%5[0-9]/%255[^/]/%5[0-9]", |
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sfwd_port, buf, sfwd_host_port) != 3) { |
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logit("Bad forwarding specification."); |
logit("Bad forwarding specification."); |
goto out; |
goto out; |
} |
} |
if ((fwd_port = a2port(sfwd_port)) == 0 || |
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(fwd_host_port = a2port(sfwd_host_port)) == 0) { |
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logit("Bad forwarding port(s)."); |
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goto out; |
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} |
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if (local) { |
if (local) { |
if (channel_setup_local_fwd_listener(fwd_port, buf, |
if (channel_setup_local_fwd_listener(fwd.listen_host, |
fwd_host_port, options.gateway_ports) < 0) { |
fwd.listen_port, fwd.connect_host, |
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fwd.connect_port, options.gateway_ports) < 0) { |
logit("Port forwarding failed."); |
logit("Port forwarding failed."); |
goto out; |
goto out; |
} |
} |
} else |
} else { |
channel_request_remote_forwarding(fwd_port, buf, |
channel_request_remote_forwarding(fwd.listen_host, |
fwd_host_port); |
fwd.listen_port, fwd.connect_host, |
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fwd.connect_port); |
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} |
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logit("Forwarding port."); |
logit("Forwarding port."); |
} |
} |
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signal(SIGQUIT, signal_handler); |
signal(SIGQUIT, signal_handler); |
if (signal(SIGTERM, SIG_IGN) != SIG_IGN) |
if (signal(SIGTERM, SIG_IGN) != SIG_IGN) |
signal(SIGTERM, signal_handler); |
signal(SIGTERM, signal_handler); |
if (have_pty) |
signal(SIGWINCH, window_change_handler); |
signal(SIGWINCH, window_change_handler); |
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if (have_pty) |
if (have_pty) |
enter_raw_mode(); |
enter_raw_mode(); |
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/* Terminate the session. */ |
/* Terminate the session. */ |
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/* Stop watching for window change. */ |
/* Stop watching for window change. */ |
if (have_pty) |
signal(SIGWINCH, SIG_DFL); |
signal(SIGWINCH, SIG_DFL); |
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channel_free_all(); |
channel_free_all(); |
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dispatch_fn *subsys_repl) |
dispatch_fn *subsys_repl) |
{ |
{ |
int len; |
int len; |
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Channel *c = NULL; |
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debug2("%s: id %d", __func__, id); |
debug2("%s: id %d", __func__, id); |
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if ((c = channel_lookup(id)) == NULL) |
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fatal("client_session2_setup: channel %d: unknown channel", id); |
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if (want_tty) { |
if (want_tty) { |
struct winsize ws; |
struct winsize ws; |
struct termios tio; |
struct termios tio; |
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tty_make_modes(-1, tiop != NULL ? tiop : &tio); |
tty_make_modes(-1, tiop != NULL ? tiop : &tio); |
packet_send(); |
packet_send(); |
/* XXX wait for reply */ |
/* XXX wait for reply */ |
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c->client_tty = 1; |
} |
} |
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/* Transfer any environment variables from client to server */ |
/* Transfer any environment variables from client to server */ |