};
/*
- * little structure to keep track of outstanding WINDOW_ADJUSTs
- */
-struct winadj {
- struct winadj *next;
- unsigned size;
-};
-
-/*
* 2-3-4 tree storing channels.
*/
struct ssh_channel {
}
/*
+ * Construct the common parts of a CHANNEL_OPEN.
+ */
+static struct Packet *ssh2_chanopen_init(struct ssh_channel *c, char *type)
+{
+ struct Packet *pktout;
+
+ pktout = ssh2_pkt_init(SSH2_MSG_CHANNEL_OPEN);
+ ssh2_pkt_addstring(pktout, type);
+ ssh2_pkt_adduint32(pktout, c->localid);
+ ssh2_pkt_adduint32(pktout, c->v.v2.locwindow);/* our window size */
+ ssh2_pkt_adduint32(pktout, OUR_V2_MAXPKT); /* our max pkt size */
+ return pktout;
+}
+
+/*
* CHANNEL_FAILURE doesn't come with any indication of what message
* caused it, so we have to keep track of the outstanding
* CHANNEL_REQUESTs ourselves.
ssh2_pkt_adduint32(pktout, arg);
}
-static void ssh2_maybe_setup_x11(struct ssh_channel *c, struct Packet *pktin,
- void *ctx)
+static void ssh2_setup_x11(struct ssh_channel *c, struct Packet *pktin,
+ void *ctx)
{
- struct ssh2_maybe_setup_x11_state {
+ struct ssh2_setup_x11_state {
int crLine;
};
Ssh ssh = c->ssh;
struct Packet *pktout;
- crStateP(ssh2_maybe_setup_x11_state, ctx);
+ crStateP(ssh2_setup_x11_state, ctx);
crBeginState;
+ logevent("Requesting X11 forwarding");
+ pktout = ssh2_chanreq_init(ssh->mainchan, "x11-req",
+ ssh2_setup_x11, s);
+ ssh2_pkt_addbool(pktout, 0); /* many connections */
+ ssh2_pkt_addstring(pktout, ssh->x11disp->remoteauthprotoname);
/*
- * Potentially enable X11 forwarding.
+ * Note that while we blank the X authentication data here, we don't
+ * take any special action to blank the start of an X11 channel,
+ * so using MIT-MAGIC-COOKIE-1 and actually opening an X connection
+ * without having session blanking enabled is likely to leak your
+ * cookie into the log.
*/
- if (ssh->mainchan && !ssh->ncmode && conf_get_int(ssh->conf, CONF_x11_forward) &&
- (ssh->x11disp = x11_setup_display(conf_get_str(ssh->conf, CONF_x11_display),
- conf_get_int(ssh->conf, CONF_x11_auth), ssh->conf))) {
- logevent("Requesting X11 forwarding");
- pktout = ssh2_chanreq_init(ssh->mainchan, "x11-req",
- ssh2_maybe_setup_x11, s);
- ssh2_pkt_addbool(pktout, 0); /* many connections */
- ssh2_pkt_addstring(pktout, ssh->x11disp->remoteauthprotoname);
- /*
- * Note that while we blank the X authentication data here, we don't
- * take any special action to blank the start of an X11 channel,
- * so using MIT-MAGIC-COOKIE-1 and actually opening an X connection
- * without having session blanking enabled is likely to leak your
- * cookie into the log.
- */
- dont_log_password(ssh, pktout, PKTLOG_BLANK);
- ssh2_pkt_addstring(pktout, ssh->x11disp->remoteauthdatastring);
- end_log_omission(ssh, pktout);
- ssh2_pkt_adduint32(pktout, ssh->x11disp->screennum);
- ssh2_pkt_send(ssh, pktout);
+ dont_log_password(ssh, pktout, PKTLOG_BLANK);
+ ssh2_pkt_addstring(pktout, ssh->x11disp->remoteauthdatastring);
+ end_log_omission(ssh, pktout);
+ ssh2_pkt_adduint32(pktout, ssh->x11disp->screennum);
+ ssh2_pkt_send(ssh, pktout);
- crWaitUntilV(pktin);
+ crWaitUntilV(pktin);
- if (pktin) {
- if (pktin->type == SSH2_MSG_CHANNEL_SUCCESS) {
- logevent("X11 forwarding enabled");
- ssh->X11_fwd_enabled = TRUE;
- } else
- logevent("X11 forwarding refused");
- }
+ if (pktin) {
+ if (pktin->type == SSH2_MSG_CHANNEL_SUCCESS) {
+ logevent("X11 forwarding enabled");
+ ssh->X11_fwd_enabled = TRUE;
+ } else
+ logevent("X11 forwarding refused");
}
+
crFinishFreeV;
}
-static void ssh2_maybe_setup_agent(struct ssh_channel *c, struct Packet *pktin,
+static void ssh2_setup_agent(struct ssh_channel *c, struct Packet *pktin,
void *ctx)
{
- struct ssh2_maybe_setup_agent_state {
+ struct ssh2_setup_agent_state {
int crLine;
};
Ssh ssh = c->ssh;
struct Packet *pktout;
- crStateP(ssh2_maybe_setup_agent_state, ctx);
+ crStateP(ssh2_setup_agent_state, ctx);
crBeginState;
- if (ssh->mainchan && !ssh->ncmode && conf_get_int(ssh->conf, CONF_agentfwd) && agent_exists()) {
- logevent("Requesting OpenSSH-style agent forwarding");
- pktout = ssh2_chanreq_init(ssh->mainchan, "auth-agent-req@openssh.com",
- ssh2_maybe_setup_agent, s);
- ssh2_pkt_send(ssh, pktout);
+ logevent("Requesting OpenSSH-style agent forwarding");
+ pktout = ssh2_chanreq_init(ssh->mainchan, "auth-agent-req@openssh.com",
+ ssh2_setup_agent, s);
+ ssh2_pkt_send(ssh, pktout);
- crWaitUntilV(pktin);
+ crWaitUntilV(pktin);
- if (pktin) {
- if (pktin->type == SSH2_MSG_CHANNEL_SUCCESS) {
- logevent("Agent forwarding enabled");
- ssh->agentfwd_enabled = TRUE;
- } else
- logevent("Agent forwarding refused");
- }
+ if (pktin) {
+ if (pktin->type == SSH2_MSG_CHANNEL_SUCCESS) {
+ logevent("Agent forwarding enabled");
+ ssh->agentfwd_enabled = TRUE;
+ } else
+ logevent("Agent forwarding refused");
}
+
crFinishFreeV;
}
-static void ssh2_maybe_setup_pty(struct ssh_channel *c, struct Packet *pktin,
+static void ssh2_setup_pty(struct ssh_channel *c, struct Packet *pktin,
void *ctx)
{
- struct ssh2_maybe_setup_pty_state {
+ struct ssh2_setup_pty_state {
int crLine;
};
Ssh ssh = c->ssh;
struct Packet *pktout;
- crStateP(ssh2_maybe_setup_pty_state, ctx);
+ crStateP(ssh2_setup_pty_state, ctx);
crBeginState;
- if (ssh->mainchan && !ssh->ncmode && !conf_get_int(ssh->conf, CONF_nopty)) {
- /* Unpick the terminal-speed string. */
- /* XXX perhaps we should allow no speeds to be sent. */
- ssh->ospeed = 38400; ssh->ispeed = 38400; /* last-resort defaults */
- sscanf(conf_get_str(ssh->conf, CONF_termspeed), "%d,%d", &ssh->ospeed, &ssh->ispeed);
- /* Build the pty request. */
- pktout = ssh2_chanreq_init(ssh->mainchan, "pty-req",
- ssh2_maybe_setup_pty, s);
- ssh2_pkt_addstring(pktout, conf_get_str(ssh->conf, CONF_termtype));
- ssh2_pkt_adduint32(pktout, ssh->term_width);
- ssh2_pkt_adduint32(pktout, ssh->term_height);
- ssh2_pkt_adduint32(pktout, 0); /* pixel width */
- ssh2_pkt_adduint32(pktout, 0); /* pixel height */
- ssh2_pkt_addstring_start(pktout);
- parse_ttymodes(ssh, ssh2_send_ttymode, (void *)pktout);
- ssh2_pkt_addbyte(pktout, SSH2_TTY_OP_ISPEED);
- ssh2_pkt_adduint32(pktout, ssh->ispeed);
- ssh2_pkt_addbyte(pktout, SSH2_TTY_OP_OSPEED);
- ssh2_pkt_adduint32(pktout, ssh->ospeed);
- ssh2_pkt_addstring_data(pktout, "\0", 1); /* TTY_OP_END */
- ssh2_pkt_send(ssh, pktout);
- ssh->state = SSH_STATE_INTERMED;
+ /* Unpick the terminal-speed string. */
+ /* XXX perhaps we should allow no speeds to be sent. */
+ ssh->ospeed = 38400; ssh->ispeed = 38400; /* last-resort defaults */
+ sscanf(conf_get_str(ssh->conf, CONF_termspeed), "%d,%d", &ssh->ospeed, &ssh->ispeed);
+ /* Build the pty request. */
+ pktout = ssh2_chanreq_init(ssh->mainchan, "pty-req",
+ ssh2_setup_pty, s);
+ ssh2_pkt_addstring(pktout, conf_get_str(ssh->conf, CONF_termtype));
+ ssh2_pkt_adduint32(pktout, ssh->term_width);
+ ssh2_pkt_adduint32(pktout, ssh->term_height);
+ ssh2_pkt_adduint32(pktout, 0); /* pixel width */
+ ssh2_pkt_adduint32(pktout, 0); /* pixel height */
+ ssh2_pkt_addstring_start(pktout);
+ parse_ttymodes(ssh, ssh2_send_ttymode, (void *)pktout);
+ ssh2_pkt_addbyte(pktout, SSH2_TTY_OP_ISPEED);
+ ssh2_pkt_adduint32(pktout, ssh->ispeed);
+ ssh2_pkt_addbyte(pktout, SSH2_TTY_OP_OSPEED);
+ ssh2_pkt_adduint32(pktout, ssh->ospeed);
+ ssh2_pkt_addstring_data(pktout, "\0", 1); /* TTY_OP_END */
+ ssh2_pkt_send(ssh, pktout);
+ ssh->state = SSH_STATE_INTERMED;
- crWaitUntilV(pktin);
+ crWaitUntilV(pktin);
- if (pktin) {
- if (pktin->type == SSH2_MSG_CHANNEL_SUCCESS) {
- logeventf(ssh, "Allocated pty (ospeed %dbps, ispeed %dbps)",
- ssh->ospeed, ssh->ispeed);
- ssh->got_pty = TRUE;
- } else {
- c_write_str(ssh, "Server refused to allocate pty\r\n");
- ssh->editing = ssh->echoing = 1;
- }
- }
- } else {
- ssh->editing = ssh->echoing = 1;
+ if (pktin) {
+ if (pktin->type == SSH2_MSG_CHANNEL_SUCCESS) {
+ logeventf(ssh, "Allocated pty (ospeed %dbps, ispeed %dbps)",
+ ssh->ospeed, ssh->ispeed);
+ ssh->got_pty = TRUE;
+ } else {
+ c_write_str(ssh, "Server refused to allocate pty\r\n");
+ ssh->editing = ssh->echoing = 1;
+ }
}
+
crFinishFreeV;
}
* then wait for a whole bunch of successes or failures.
*/
s->num_env = 0;
- if (ssh->mainchan && !ssh->ncmode) {
+ {
char *key, *val;
for (val = conf_get_str_strs(ssh->conf, CONF_environmt, NULL, &key);
"Opening direct-tcpip channel to %s:%d in place of session",
conf_get_str(ssh->conf, CONF_ssh_nc_host),
conf_get_int(ssh->conf, CONF_ssh_nc_port));
- s->pktout = ssh2_pkt_init(SSH2_MSG_CHANNEL_OPEN);
- ssh2_pkt_addstring(s->pktout, "direct-tcpip");
- ssh2_pkt_adduint32(s->pktout, ssh->mainchan->localid);
- ssh2_pkt_adduint32(s->pktout, ssh->mainchan->v.v2.locwindow);/* our window size */
- ssh2_pkt_adduint32(s->pktout, OUR_V2_MAXPKT); /* our max pkt size */
+ s->pktout = ssh2_chanopen_init(ssh->mainchan, "direct-tcpip");
ssh2_pkt_addstring(s->pktout, conf_get_str(ssh->conf, CONF_ssh_nc_host));
ssh2_pkt_adduint32(s->pktout, conf_get_int(ssh->conf, CONF_ssh_nc_port));
/*
ssh->mainchan = snew(struct ssh_channel);
ssh->mainchan->ssh = ssh;
ssh2_channel_init(ssh->mainchan);
- s->pktout = ssh2_pkt_init(SSH2_MSG_CHANNEL_OPEN);
- ssh2_pkt_addstring(s->pktout, "session");
- ssh2_pkt_adduint32(s->pktout, ssh->mainchan->localid);
- ssh2_pkt_adduint32(s->pktout, ssh->mainchan->v.v2.locwindow);/* our window size */
- ssh2_pkt_adduint32(s->pktout, OUR_V2_MAXPKT); /* our max pkt size */
+ s->pktout = ssh2_chanopen_init(ssh->mainchan, "session");
ssh2_pkt_send(ssh, s->pktout);
crWaitUntilV(pktin);
if (pktin->type != SSH2_MSG_CHANNEL_OPEN_CONFIRMATION) {
*/
ssh_setup_portfwd(ssh, ssh->conf);
- /*
- * Send the CHANNEL_REQUESTS for the main channel. Each one is
- * handled by its own little asynchronous co-routine.
- */
+ if (ssh->mainchan && !ssh->ncmode) {
+ /*
+ * Send the CHANNEL_REQUESTS for the main session channel.
+ * Each one is handled by its own little asynchronous
+ * co-routine.
+ */
- /*
- * Potentially enable X11 forwarding.
- */
- ssh2_maybe_setup_x11(ssh->mainchan, NULL, NULL);
+ /* Potentially enable X11 forwarding. */
+ if (conf_get_int(ssh->conf, CONF_x11_forward) &&
+ (ssh->x11disp =
+ x11_setup_display(conf_get_str(ssh->conf, CONF_x11_display),
+ conf_get_int(ssh->conf, CONF_x11_auth),
+ ssh->conf)))
+ ssh2_setup_x11(ssh->mainchan, NULL, NULL);
- /*
- * Potentially enable agent forwarding.
- */
- ssh2_maybe_setup_agent(ssh->mainchan, NULL, NULL);
+ /* Potentially enable agent forwarding. */
+ if (conf_get_int(ssh->conf, CONF_agentfwd) && agent_exists())
+ ssh2_setup_agent(ssh->mainchan, NULL, NULL);
- /*
- * Now allocate a pty for the session.
- */
- ssh2_maybe_setup_pty(ssh->mainchan, NULL, NULL);
+ /* Now allocate a pty for the session. */
+ if (!conf_get_int(ssh->conf, CONF_nopty))
+ ssh2_setup_pty(ssh->mainchan, NULL, NULL);
- /*
- * Send environment variables.
- */
- ssh2_setup_env(ssh->mainchan, NULL, NULL);
+ /* Send environment variables. */
+ ssh2_setup_env(ssh->mainchan, NULL, NULL);
- /*
- * Start a shell or a remote command. We may have to attempt
- * this twice if the config data has provided a second choice
- * of command.
- */
- if (ssh->mainchan && !ssh->ncmode) while (1) {
- int subsys;
- char *cmd;
+ /*
+ * Start a shell or a remote command. We may have to attempt
+ * this twice if the config data has provided a second choice
+ * of command.
+ */
+ while (1) {
+ int subsys;
+ char *cmd;
- if (ssh->fallback_cmd) {
- subsys = conf_get_int(ssh->conf, CONF_ssh_subsys2);
- cmd = conf_get_str(ssh->conf, CONF_remote_cmd2);
- } else {
- subsys = conf_get_int(ssh->conf, CONF_ssh_subsys);
- cmd = conf_get_str(ssh->conf, CONF_remote_cmd);
- }
+ if (ssh->fallback_cmd) {
+ subsys = conf_get_int(ssh->conf, CONF_ssh_subsys2);
+ cmd = conf_get_str(ssh->conf, CONF_remote_cmd2);
+ } else {
+ subsys = conf_get_int(ssh->conf, CONF_ssh_subsys);
+ cmd = conf_get_str(ssh->conf, CONF_remote_cmd);
+ }
- if (subsys) {
- s->pktout = ssh2_chanreq_init(ssh->mainchan, "subsystem",
- ssh2_response_authconn, NULL);
- ssh2_pkt_addstring(s->pktout, cmd);
- } else if (*cmd) {
- s->pktout = ssh2_chanreq_init(ssh->mainchan, "exec",
- ssh2_response_authconn, NULL);
- ssh2_pkt_addstring(s->pktout, cmd);
- } else {
- s->pktout = ssh2_chanreq_init(ssh->mainchan, "shell",
- ssh2_response_authconn, NULL);
- }
- ssh2_pkt_send(ssh, s->pktout);
+ if (subsys) {
+ s->pktout = ssh2_chanreq_init(ssh->mainchan, "subsystem",
+ ssh2_response_authconn, NULL);
+ ssh2_pkt_addstring(s->pktout, cmd);
+ } else if (*cmd) {
+ s->pktout = ssh2_chanreq_init(ssh->mainchan, "exec",
+ ssh2_response_authconn, NULL);
+ ssh2_pkt_addstring(s->pktout, cmd);
+ } else {
+ s->pktout = ssh2_chanreq_init(ssh->mainchan, "shell",
+ ssh2_response_authconn, NULL);
+ }
+ ssh2_pkt_send(ssh, s->pktout);
- crWaitUntilV(pktin);
+ crWaitUntilV(pktin);
- if (pktin->type != SSH2_MSG_CHANNEL_SUCCESS) {
- if (pktin->type != SSH2_MSG_CHANNEL_FAILURE) {
- bombout(("Unexpected response to shell/command request:"
- " packet type %d", pktin->type));
+ if (pktin->type != SSH2_MSG_CHANNEL_SUCCESS) {
+ if (pktin->type != SSH2_MSG_CHANNEL_FAILURE) {
+ bombout(("Unexpected response to shell/command request:"
+ " packet type %d", pktin->type));
+ crStopV;
+ }
+ /*
+ * We failed to start the command. If this is the
+ * fallback command, we really are finished; if it's
+ * not, and if the fallback command exists, try falling
+ * back to it before complaining.
+ */
+ if (!ssh->fallback_cmd &&
+ *conf_get_str(ssh->conf, CONF_remote_cmd2)) {
+ logevent("Primary command failed; attempting fallback");
+ ssh->fallback_cmd = TRUE;
+ continue;
+ }
+ bombout(("Server refused to start a shell/command"));
crStopV;
+ } else {
+ logevent("Started a shell/command");
}
- /*
- * We failed to start the command. If this is the
- * fallback command, we really are finished; if it's
- * not, and if the fallback command exists, try falling
- * back to it before complaining.
- */
- if (!ssh->fallback_cmd &&
- *conf_get_str(ssh->conf, CONF_remote_cmd2)) {
- logevent("Primary command failed; attempting fallback");
- ssh->fallback_cmd = TRUE;
- continue;
- }
- bombout(("Server refused to start a shell/command"));
- crStopV;
- } else {
- logevent("Started a shell/command");
+ break;
}
- break;
+ } else {
+ ssh->editing = ssh->echoing = TRUE;
}
ssh->state = SSH_STATE_SESSION;
ssh_special(ssh, TS_EOF);
/*
- * All the initial channel requests are done, so install the default
- * response handler.
- */
- ssh->packet_dispatch[SSH2_MSG_CHANNEL_SUCCESS] = ssh2_msg_channel_response;
- ssh->packet_dispatch[SSH2_MSG_CHANNEL_FAILURE] = ssh2_msg_channel_response;
-
- /*
* Transfer data!
*/
if (ssh->ldisc)
/* PKT_STR, <org:orgport>, */
PKT_END);
} else {
- pktout = ssh2_pkt_init(SSH2_MSG_CHANNEL_OPEN);
- ssh2_pkt_addstring(pktout, "direct-tcpip");
- ssh2_pkt_adduint32(pktout, c->localid);
- ssh2_pkt_adduint32(pktout, c->v.v2.locwindow);/* our window size */
- ssh2_pkt_adduint32(pktout, OUR_V2_MAXPKT); /* our max pkt size */
+ pktout = ssh2_chanopen_init(c, "direct-tcpip");
ssh2_pkt_addstring(pktout, hostname);
ssh2_pkt_adduint32(pktout, port);
/*
~mdw / sgt / putty / blobdiff