-/* $OpenBSD: ssh.c,v 1.294 2006/10/06 02:29:19 djm Exp $ */
+/* $OpenBSD: ssh.c,v 1.301 2007/08/07 07:32:53 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
usage(void)
{
fprintf(stderr,
-"usage: ssh [-1246AaCfgkMNnqsTtVvXxY] [-b bind_address] [-c cipher_spec]\n"
+"usage: ssh [-1246AaCfgKkMNnqsTtVvXxY] [-b bind_address] [-c cipher_spec]\n"
" [-D [bind_address:]port] [-e escape_char] [-F configfile]\n"
" [-i identity_file] [-L [bind_address:]port:host:hostport]\n"
" [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]\n"
again:
while ((opt = getopt(ac, av,
- "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:MNO:PR:S:TVw:XY")) != -1) {
+ "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:KL:MNO:PR:S:TVw:XY")) != -1) {
switch (opt) {
case '1':
options.protocol = SSH_PROTO_1;
case 'k':
options.gss_deleg_creds = 0;
break;
+ case 'K':
+ options.gss_authentication = 1;
+ options.gss_deleg_creds = 1;
+ break;
case 'i':
if (stat(optarg, &st) < 0) {
fprintf(stderr, "Warning: Identity file %s "
if (!read_config_file(config, host, &options, 0))
fatal("Can't open user config file %.100s: "
"%.100s", config, strerror(errno));
- } else {
+ } else {
/*
* Since the config file parsing code aborts if it sees
* options it doesn't recognize, allow users to put
"forwarding.");
}
}
+
+ /* Initiate tunnel forwarding. */
+ if (options.tun_open != SSH_TUNMODE_NO) {
+ if (client_request_tun_fwd(options.tun_open,
+ options.tun_local, options.tun_remote) == -1) {
+ if (options.exit_on_forward_failure)
+ fatal("Could not request tunnel forwarding.");
+ else
+ error("Could not request tunnel forwarding.");
+ }
+ }
}
static void
packet_send();
}
- if (options.tun_open != SSH_TUNMODE_NO) {
- Channel *c;
- int fd;
-
- debug("Requesting tun.");
- if ((fd = tun_open(options.tun_local,
- options.tun_open)) >= 0) {
- if(options.hpn_disabled)
- c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1,
- CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
- 0, "tun", 1);
- else
- c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1,
- options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT,
- 0, "tun", 1);
- c->datagram = 1;
-#if defined(SSH_TUN_FILTER)
- if (options.tun_open == SSH_TUNMODE_POINTOPOINT)
- channel_register_filter(c->self, sys_tun_infilter,
- sys_tun_outfilter);
-#endif
- packet_start(SSH2_MSG_CHANNEL_OPEN);
- packet_put_cstring("tun@openssh.com");
- packet_put_int(c->self);
- packet_put_int(c->local_window_max);
- packet_put_int(c->local_maxpacket);
- packet_put_int(options.tun_open);
- packet_put_int(options.tun_remote);
- packet_send();
- }
- }
-
client_session2_setup(id, tty_flag, subsystem_flag, getenv("TERM"),
NULL, fileno(stdin), &command, environ, &ssh_subsystem_reply);
/* window the window would get stuck at the initial buffer */
/* size generally less than 96k. Therefore we need to set the */
/* maximum ssh window size to the maximum hpn buffer size */
- /* unless the user hasspecifically set the hpnrcvbufpoll */
+ /* unless the user has specifically set the tcprcvbufpoll */
/* to no. In which case we *can* just set the window to the */
/* minimum of the hpn buffer size and tcp receive buffer size */
{
if (options.hpn_buffer_size < 0)
options.hpn_buffer_size = BUFFER_MAX_LEN_HPN;
+
+ /*create a socket but don't connect it */
+ /* we use that the get the rcv socket size */
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ /* if they are using the tcp_rcv_buf option */
+ /* attempt to set the buffer size to that */
+ if (options.tcp_rcv_buf)
+ setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void *)&options.tcp_rcv_buf,
+ sizeof(options.tcp_rcv_buf));
+ getsockopt(sock, SOL_SOCKET, SO_RCVBUF,
+ &socksize, &socksizelen);
+ close(sock);
+ debug("socksize %d", socksize);
if (options.tcp_rcv_buf_poll <= 0)
{
- /*create a socket but don't connect it */
- /* we use that the get the rcv socket size */
- sock = socket(AF_INET, SOCK_STREAM, 0);
- /* if they are using the tcp_rcv_buf option */
- /* attempt to set the buffer size to that */
- if (options.tcp_rcv_buf)
- setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void *)&options.tcp_rcv_buf,
- sizeof(options.tcp_rcv_buf));
- getsockopt(sock, SOL_SOCKET, SO_RCVBUF,
- &socksize, &socksizelen);
- close(sock);
- debug("socksize %d", socksize);
- options.hpn_buffer_size = MIN(socksize,options.hpn_buffer_size);
+ options.hpn_buffer_size = MIN(socksize,options.hpn_buffer_size);
+ debug ("MIN of TCP RWIN and HPNBufferSize: %d", options.hpn_buffer_size);
}
else
{
if (options.tcp_rcv_buf > 0)
options.hpn_buffer_size = MIN(options.tcp_rcv_buf, options.hpn_buffer_size);
+ debug ("MIN of TCPRcvBuf and HPNBufferSize: %d", options.hpn_buffer_size);
}
}
"session", SSH_CHANNEL_OPENING, in, out, err,
window, packetmax, CHAN_EXTENDED_WRITE,
"client-session", /*nonblock*/0);
+
if ((options.tcp_rcv_buf_poll > 0) && (!options.hpn_disabled)) {
c->dynamic_window = 1;
debug ("Enabled Dynamic Window Scaling\n");
/* XXX should be pre-session */
ssh_init_forwarding();
- ssh_control_listener();
if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN))
id = ssh_session2_open();
options.permit_local_command)
ssh_local_cmd(options.local_command);
+ /* Start listening for multiplex clients */
+ ssh_control_listener();
+
/* If requested, let ssh continue in the background. */
if (fork_after_authentication_flag)
if (daemon(1, 1) < 0)
control_client(const char *path)
{
struct sockaddr_un addr;
- int i, r, fd, sock, exitval, num_env, addr_len;
+ int i, r, fd, sock, exitval[2], num_env, addr_len;
Buffer m;
char *term;
extern char **environ;
flags |= SSHMUX_FLAG_X11_FWD;
if (options.forward_agent)
flags |= SSHMUX_FLAG_AGENT_FWD;
- if (options.num_local_forwards > 0)
- flags |= SSHMUX_FLAG_PORTFORWARD;
+
buffer_init(&m);
/* Send our command to server */
buffer_put_int(&m, mux_command);
buffer_put_int(&m, flags);
- if (options.num_local_forwards > 0)
- {
- if (options.local_forwards[0].listen_host == NULL)
- buffer_put_string(&m,"LOCALHOST",11);
- else
- buffer_put_string(&m,options.local_forwards[0].listen_host,512);
- buffer_put_int(&m,options.local_forwards[0].listen_port);
- buffer_put_string(&m,options.local_forwards[0].connect_host,512);
- buffer_put_int(&m,options.local_forwards[0].connect_port);
- }
if (ssh_msg_send(sock, SSHMUX_VER, &m) == -1)
fatal("%s: msg_send", __func__);
buffer_clear(&m);
if (tty_flag)
enter_raw_mode();
- /* Stick around until the controlee closes the client_fd */
- exitval = 0;
- for (;!control_client_terminate;) {
- r = read(sock, &exitval, sizeof(exitval));
+ /*
+ * Stick around until the controlee closes the client_fd.
+ * Before it does, it is expected to write this process' exit
+ * value (one int). This process must read the value and wait for
+ * the closure of the client_fd; if this one closes early, the
+ * multiplex master will terminate early too (possibly losing data).
+ */
+ exitval[0] = 0;
+ for (i = 0; !control_client_terminate && i < (int)sizeof(exitval);) {
+ r = read(sock, (char *)exitval + i, sizeof(exitval) - i);
if (r == 0) {
debug2("Received EOF from master");
break;
}
- if (r > 0)
- debug2("Received exit status from master %d", exitval);
- if (r == -1 && errno != EINTR)
+ if (r == -1) {
+ if (errno == EINTR)
+ continue;
fatal("%s: read %s", __func__, strerror(errno));
+ }
+ i += r;
}
- if (control_client_terminate)
- debug2("Exiting on signal %d", control_client_terminate);
-
close(sock);
-
leave_raw_mode();
+ if (i > (int)sizeof(int))
+ fatal("%s: master returned too much data (%d > %lu)",
+ __func__, i, sizeof(int));
+ if (control_client_terminate) {
+ debug2("Exiting on signal %d", control_client_terminate);
+ exitval[0] = 255;
+ } else if (i < (int)sizeof(int)) {
+ debug2("Control master terminated unexpectedly");
+ exitval[0] = 255;
+ } else
+ debug2("Received exit status from master %d", exitval[0]);
if (tty_flag && options.log_level != SYSLOG_LEVEL_QUIET)
- fprintf(stderr, "Connection to master closed.\r\n");
+ fprintf(stderr, "Shared connection to %s closed.\r\n", host);
- exit(exitval);
+ exit(exitval[0]);
}