#include <termios.h>
#include <pwd.h>
#include <sys/ioctl.h>
+#include <sys/time.h>
+#ifndef HAVE_NO_SYS_SELECT_H
+#include <sys/select.h>
+#endif
#define PUTTY_DO_GLOBALS /* actually _define_ globals */
#include "putty.h"
#define MAX_STDIN_BACKLOG 4096
-void fatalbox(char *p, ...)
+static void *logctx;
+
+static struct termios orig_termios;
+
+void fatalbox(const char *p, ...)
{
+ struct termios cf;
va_list ap;
+ premsg(&cf);
fprintf(stderr, "FATAL ERROR: ");
va_start(ap, p);
vfprintf(stderr, p, ap);
va_end(ap);
fputc('\n', stderr);
+ postmsg(&cf);
+ if (logctx) {
+ log_free(logctx);
+ logctx = NULL;
+ }
cleanup_exit(1);
}
-void modalfatalbox(char *p, ...)
+void modalfatalbox(const char *p, ...)
{
+ struct termios cf;
va_list ap;
+ premsg(&cf);
fprintf(stderr, "FATAL ERROR: ");
va_start(ap, p);
vfprintf(stderr, p, ap);
va_end(ap);
fputc('\n', stderr);
+ postmsg(&cf);
+ if (logctx) {
+ log_free(logctx);
+ logctx = NULL;
+ }
cleanup_exit(1);
}
-void connection_fatal(void *frontend, char *p, ...)
+void nonfatal(const char *p, ...)
{
+ struct termios cf;
va_list ap;
+ premsg(&cf);
+ fprintf(stderr, "ERROR: ");
+ va_start(ap, p);
+ vfprintf(stderr, p, ap);
+ va_end(ap);
+ fputc('\n', stderr);
+ postmsg(&cf);
+}
+void connection_fatal(void *frontend, const char *p, ...)
+{
+ struct termios cf;
+ va_list ap;
+ premsg(&cf);
fprintf(stderr, "FATAL ERROR: ");
va_start(ap, p);
vfprintf(stderr, p, ap);
va_end(ap);
fputc('\n', stderr);
+ postmsg(&cf);
+ if (logctx) {
+ log_free(logctx);
+ logctx = NULL;
+ }
cleanup_exit(1);
}
-void cmdline_error(char *p, ...)
+void cmdline_error(const char *p, ...)
{
+ struct termios cf;
va_list ap;
+ premsg(&cf);
fprintf(stderr, "plink: ");
va_start(ap, p);
vfprintf(stderr, p, ap);
va_end(ap);
fputc('\n', stderr);
+ postmsg(&cf);
exit(1);
}
-struct termios orig_termios;
+static int local_tty = FALSE; /* do we have a local tty? */
static Backend *back;
static void *backhandle;
-static Config cfg;
+static Conf *conf;
/*
- * Default settings that are specific to pterm.
+ * Default settings that are specific to Unix plink.
*/
char *platform_default_s(const char *name)
{
- if (!strcmp(name, "X11Display"))
- return dupstr(getenv("DISPLAY"));
if (!strcmp(name, "TermType"))
return dupstr(getenv("TERM"));
- if (!strcmp(name, "UserName"))
- return get_username();
+ if (!strcmp(name, "SerialLine"))
+ return dupstr("/dev/ttyS0");
return NULL;
}
int platform_default_i(const char *name, int def)
{
- if (!strcmp(name, "TermWidth") ||
- !strcmp(name, "TermHeight")) {
- struct winsize size;
- if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0)
- return (!strcmp(name, "TermWidth") ? size.ws_col : size.ws_row);
- }
return def;
}
-FontSpec platform_default_fontspec(const char *name)
+FontSpec *platform_default_fontspec(const char *name)
{
- FontSpec ret;
- *ret.name = '\0';
- return ret;
+ return fontspec_new("");
}
-Filename platform_default_filename(const char *name)
+Filename *platform_default_filename(const char *name)
{
- Filename ret;
if (!strcmp(name, "LogFileName"))
- strcpy(ret.path, "putty.log");
+ return filename_from_str("putty.log");
else
- *ret.path = '\0';
- return ret;
+ return filename_from_str("");
}
char *x_get_default(const char *key)
{
return FALSE;
}
-void ldisc_update(void *frontend, int echo, int edit)
+void frontend_echoedit_update(void *frontend, int echo, int edit)
{
/* Update stdin read mode to reflect changes in line discipline. */
struct termios mode;
+ if (!local_tty) return;
+
mode = orig_termios;
if (echo)
else
mode.c_lflag &= ~ECHO;
- if (edit)
+ if (edit) {
+ mode.c_iflag |= ICRNL;
mode.c_lflag |= ISIG | ICANON;
- else
+ mode.c_oflag |= OPOST;
+ } else {
+ mode.c_iflag &= ~ICRNL;
mode.c_lflag &= ~(ISIG | ICANON);
+ mode.c_oflag &= ~OPOST;
+ /* Solaris sets these to unhelpful values */
+ mode.c_cc[VMIN] = 1;
+ mode.c_cc[VTIME] = 0;
+ /* FIXME: perhaps what we do with IXON/IXOFF should be an
+ * argument to frontend_echoedit_update(), to allow
+ * implementation of SSH-2 "xon-xoff" and Rlogin's
+ * equivalent? */
+ mode.c_iflag &= ~IXON;
+ mode.c_iflag &= ~IXOFF;
+ }
+ /*
+ * Mark parity errors and (more important) BREAK on input. This
+ * is more complex than it need be because POSIX-2001 suggests
+ * that escaping of valid 0xff in the input stream is dependent on
+ * IGNPAR being clear even though marking of BREAK isn't. NetBSD
+ * 2.0 goes one worse and makes it dependent on INPCK too. We
+ * deal with this by forcing these flags into a useful state and
+ * then faking the state in which we found them in from_tty() if
+ * we get passed a parity or framing error.
+ */
+ mode.c_iflag = (mode.c_iflag | INPCK | PARMRK) & ~IGNPAR;
+
+ tcsetattr(STDIN_FILENO, TCSANOW, &mode);
+}
+
+/* Helper function to extract a special character from a termios. */
+static char *get_ttychar(struct termios *t, int index)
+{
+ cc_t c = t->c_cc[index];
+#if defined(_POSIX_VDISABLE)
+ if (c == _POSIX_VDISABLE)
+ return dupstr("");
+#endif
+ return dupprintf("^<%d>", c);
+}
+
+char *get_ttymode(void *frontend, const char *mode)
+{
+ /*
+ * Propagate appropriate terminal modes from the local terminal,
+ * if any.
+ */
+ if (!local_tty) return NULL;
+
+#define GET_CHAR(ourname, uxname) \
+ do { \
+ if (strcmp(mode, ourname) == 0) \
+ return get_ttychar(&orig_termios, uxname); \
+ } while(0)
+#define GET_BOOL(ourname, uxname, uxmemb, transform) \
+ do { \
+ if (strcmp(mode, ourname) == 0) { \
+ int b = (orig_termios.uxmemb & uxname) != 0; \
+ transform; \
+ return dupprintf("%d", b); \
+ } \
+ } while (0)
+
+ /*
+ * Modes that want to be the same on all terminal devices involved.
+ */
+ /* All the special characters supported by SSH */
+#if defined(VINTR)
+ GET_CHAR("INTR", VINTR);
+#endif
+#if defined(VQUIT)
+ GET_CHAR("QUIT", VQUIT);
+#endif
+#if defined(VERASE)
+ GET_CHAR("ERASE", VERASE);
+#endif
+#if defined(VKILL)
+ GET_CHAR("KILL", VKILL);
+#endif
+#if defined(VEOF)
+ GET_CHAR("EOF", VEOF);
+#endif
+#if defined(VEOL)
+ GET_CHAR("EOL", VEOL);
+#endif
+#if defined(VEOL2)
+ GET_CHAR("EOL2", VEOL2);
+#endif
+#if defined(VSTART)
+ GET_CHAR("START", VSTART);
+#endif
+#if defined(VSTOP)
+ GET_CHAR("STOP", VSTOP);
+#endif
+#if defined(VSUSP)
+ GET_CHAR("SUSP", VSUSP);
+#endif
+#if defined(VDSUSP)
+ GET_CHAR("DSUSP", VDSUSP);
+#endif
+#if defined(VREPRINT)
+ GET_CHAR("REPRINT", VREPRINT);
+#endif
+#if defined(VWERASE)
+ GET_CHAR("WERASE", VWERASE);
+#endif
+#if defined(VLNEXT)
+ GET_CHAR("LNEXT", VLNEXT);
+#endif
+#if defined(VFLUSH)
+ GET_CHAR("FLUSH", VFLUSH);
+#endif
+#if defined(VSWTCH)
+ GET_CHAR("SWTCH", VSWTCH);
+#endif
+#if defined(VSTATUS)
+ GET_CHAR("STATUS", VSTATUS);
+#endif
+#if defined(VDISCARD)
+ GET_CHAR("DISCARD", VDISCARD);
+#endif
+ /* Modes that "configure" other major modes. These should probably be
+ * considered as user preferences. */
+ /* Configuration of ICANON */
+#if defined(ECHOK)
+ GET_BOOL("ECHOK", ECHOK, c_lflag, );
+#endif
+#if defined(ECHOKE)
+ GET_BOOL("ECHOKE", ECHOKE, c_lflag, );
+#endif
+#if defined(ECHOE)
+ GET_BOOL("ECHOE", ECHOE, c_lflag, );
+#endif
+#if defined(ECHONL)
+ GET_BOOL("ECHONL", ECHONL, c_lflag, );
+#endif
+#if defined(XCASE)
+ GET_BOOL("XCASE", XCASE, c_lflag, );
+#endif
+#if defined(IUTF8)
+ GET_BOOL("IUTF8", IUTF8, c_iflag, );
+#endif
+ /* Configuration of ECHO */
+#if defined(ECHOCTL)
+ GET_BOOL("ECHOCTL", ECHOCTL, c_lflag, );
+#endif
+ /* Configuration of IXON/IXOFF */
+#if defined(IXANY)
+ GET_BOOL("IXANY", IXANY, c_iflag, );
+#endif
+ /* Configuration of OPOST */
+#if defined(OLCUC)
+ GET_BOOL("OLCUC", OLCUC, c_oflag, );
+#endif
+#if defined(ONLCR)
+ GET_BOOL("ONLCR", ONLCR, c_oflag, );
+#endif
+#if defined(OCRNL)
+ GET_BOOL("OCRNL", OCRNL, c_oflag, );
+#endif
+#if defined(ONOCR)
+ GET_BOOL("ONOCR", ONOCR, c_oflag, );
+#endif
+#if defined(ONLRET)
+ GET_BOOL("ONLRET", ONLRET, c_oflag, );
+#endif
+
+ /*
+ * Modes that want to be set in only one place, and that we have
+ * squashed locally.
+ */
+#if defined(ISIG)
+ GET_BOOL("ISIG", ISIG, c_lflag, );
+#endif
+#if defined(ICANON)
+ GET_BOOL("ICANON", ICANON, c_lflag, );
+#endif
+#if defined(ECHO)
+ GET_BOOL("ECHO", ECHO, c_lflag, );
+#endif
+#if defined(IXON)
+ GET_BOOL("IXON", IXON, c_iflag, );
+#endif
+#if defined(IXOFF)
+ GET_BOOL("IXOFF", IXOFF, c_iflag, );
+#endif
+#if defined(OPOST)
+ GET_BOOL("OPOST", OPOST, c_oflag, );
+#endif
+
+ /*
+ * We do not propagate the following modes:
+ * - Parity/serial settings, which are a local affair and don't
+ * make sense propagated over SSH's 8-bit byte-stream.
+ * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD
+ * - Things that want to be enabled in one place that we don't
+ * squash locally.
+ * IUCLC
+ * - Status bits.
+ * PENDIN
+ * - Things I don't know what to do with. (FIXME)
+ * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN
+ * INLCR IGNCR ICRNL
+ */
+
+#undef GET_CHAR
+#undef GET_BOOL
- tcsetattr(0, TCSANOW, &mode);
+ /* Fall through to here for unrecognised names, or ones that are
+ * unsupported on this platform */
+ return NULL;
}
void cleanup_termios(void)
{
- tcsetattr(0, TCSANOW, &orig_termios);
+ if (local_tty)
+ tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios);
}
bufchain stdout_data, stderr_data;
+enum { EOF_NO, EOF_PENDING, EOF_SENT } outgoingeof;
-void try_output(int is_stderr)
+int try_output(int is_stderr)
{
bufchain *chain = (is_stderr ? &stderr_data : &stdout_data);
- int fd = (is_stderr ? 2 : 1);
+ int fd = (is_stderr ? STDERR_FILENO : STDOUT_FILENO);
void *senddata;
int sendlen, ret;
- if (bufchain_size(chain) == 0)
- return;
-
- bufchain_prefix(chain, &senddata, &sendlen);
- ret = write(fd, senddata, sendlen);
- if (ret > 0)
- bufchain_consume(chain, ret);
- else if (ret < 0) {
- perror(is_stderr ? "stderr: write" : "stdout: write");
- exit(1);
+ if (bufchain_size(chain) > 0) {
+ int prev_nonblock = nonblock(fd);
+ do {
+ bufchain_prefix(chain, &senddata, &sendlen);
+ ret = write(fd, senddata, sendlen);
+ if (ret > 0)
+ bufchain_consume(chain, ret);
+ } while (ret == sendlen && bufchain_size(chain) != 0);
+ if (!prev_nonblock)
+ no_nonblock(fd);
+ if (ret < 0 && errno != EAGAIN) {
+ perror(is_stderr ? "stderr: write" : "stdout: write");
+ exit(1);
+ }
+ }
+ if (outgoingeof == EOF_PENDING && bufchain_size(&stdout_data) == 0) {
+ close(STDOUT_FILENO);
+ outgoingeof = EOF_SENT;
}
+ return bufchain_size(&stdout_data) + bufchain_size(&stderr_data);
}
int from_backend(void *frontend_handle, int is_stderr,
const char *data, int len)
{
- int osize, esize;
-
- assert(len > 0);
-
if (is_stderr) {
bufchain_add(&stderr_data, data, len);
- try_output(1);
+ return try_output(TRUE);
} else {
+ assert(outgoingeof == EOF_NO);
bufchain_add(&stdout_data, data, len);
- try_output(0);
+ return try_output(FALSE);
}
+}
+
+int from_backend_untrusted(void *frontend_handle, const char *data, int len)
+{
+ /*
+ * No "untrusted" output should get here (the way the code is
+ * currently, it's all diverted by FLAG_STDERR).
+ */
+ assert(!"Unexpected call to from_backend_untrusted()");
+ return 0; /* not reached */
+}
- osize = bufchain_size(&stdout_data);
- esize = bufchain_size(&stderr_data);
+int from_backend_eof(void *frontend_handle)
+{
+ assert(outgoingeof == EOF_NO);
+ outgoingeof = EOF_PENDING;
+ try_output(FALSE);
+ return FALSE; /* do not respond to incoming EOF with outgoing */
+}
- return osize + esize;
+int get_userpass_input(prompts_t *p, const unsigned char *in, int inlen)
+{
+ int ret;
+ ret = cmdline_get_passwd_input(p, in, inlen);
+ if (ret == -1)
+ ret = console_get_userpass_input(p, in, inlen);
+ return ret;
+}
+
+/*
+ * Handle data from a local tty in PARMRK format.
+ */
+static void from_tty(void *vbuf, unsigned len)
+{
+ char *p, *q, *end, *buf = vbuf;
+ static enum {NORMAL, FF, FF00} state = NORMAL;
+
+ p = buf; end = buf + len;
+ while (p < end) {
+ switch (state) {
+ case NORMAL:
+ if (*p == '\xff') {
+ p++;
+ state = FF;
+ } else {
+ q = memchr(p, '\xff', end - p);
+ if (q == NULL) q = end;
+ back->send(backhandle, p, q - p);
+ p = q;
+ }
+ break;
+ case FF:
+ if (*p == '\xff') {
+ back->send(backhandle, p, 1);
+ p++;
+ state = NORMAL;
+ } else if (*p == '\0') {
+ p++;
+ state = FF00;
+ } else abort();
+ break;
+ case FF00:
+ if (*p == '\0') {
+ back->special(backhandle, TS_BRK);
+ } else {
+ /*
+ * Pretend that PARMRK wasn't set. This involves
+ * faking what INPCK and IGNPAR would have done if
+ * we hadn't overridden them. Unfortunately, we
+ * can't do this entirely correctly because INPCK
+ * distinguishes between framing and parity
+ * errors, but PARMRK format represents both in
+ * the same way. We assume that parity errors are
+ * more common than framing errors, and hence
+ * treat all input errors as being subject to
+ * INPCK.
+ */
+ if (orig_termios.c_iflag & INPCK) {
+ /* If IGNPAR is set, we throw away the character. */
+ if (!(orig_termios.c_iflag & IGNPAR)) {
+ /* PE/FE get passed on as NUL. */
+ *p = 0;
+ back->send(backhandle, p, 1);
+ }
+ } else {
+ /* INPCK not set. Assume we got a parity error. */
+ back->send(backhandle, p, 1);
+ }
+ }
+ p++;
+ state = NORMAL;
+ }
+ }
}
int signalpipe[2];
void sigwinch(int signum)
{
- write(signalpipe[1], "x", 1);
+ if (write(signalpipe[1], "x", 1) <= 0)
+ /* not much we can do about it */;
}
/*
* In Plink our selects are synchronous, so these functions are
* empty stubs.
*/
-int uxsel_input_add(int fd, int rwx) { return 0; }
-void uxsel_input_remove(int id) { }
+uxsel_id *uxsel_input_add(int fd, int rwx) { return NULL; }
+void uxsel_input_remove(uxsel_id *id) { }
/*
* Short description of parameters.
*/
static void usage(void)
{
- printf("PuTTY Link: command-line connection utility\n");
+ printf("Plink: command-line connection utility\n");
printf("%s\n", ver);
printf("Usage: plink [options] [user@]host [command]\n");
printf(" (\"host\" can also be a PuTTY saved session name)\n");
printf("Options:\n");
+ printf(" -V print version information and exit\n");
+ printf(" -pgpfp print PGP key fingerprints and exit\n");
printf(" -v show verbose messages\n");
printf(" -load sessname Load settings from saved session\n");
- printf(" -ssh -telnet -rlogin -raw\n");
- printf(" force use of a particular protocol (default SSH)\n");
+ printf(" -ssh -telnet -rlogin -raw -serial\n");
+ printf(" force use of a particular protocol\n");
printf(" -P port connect to specified port\n");
printf(" -l user connect with specified username\n");
- printf(" -m file read remote command(s) from file\n");
printf(" -batch disable all interactive prompts\n");
+ printf(" -sercfg configuration-string (e.g. 19200,8,n,1,X)\n");
+ printf(" Specify the serial configuration (serial only)\n");
printf("The following options only apply to SSH connections:\n");
printf(" -pw passw login with specified password\n");
- printf(" -D listen-port Dynamic SOCKS-based port forwarding\n");
- printf(" -L listen-port:host:port Forward local port to "
- "remote address\n");
- printf(" -R listen-port:host:port Forward remote port to"
- " local address\n");
+ printf(" -D [listen-IP:]listen-port\n");
+ printf(" Dynamic SOCKS-based port forwarding\n");
+ printf(" -L [listen-IP:]listen-port:host:port\n");
+ printf(" Forward local port to remote address\n");
+ printf(" -R [listen-IP:]listen-port:host:port\n");
+ printf(" Forward remote port to local address\n");
printf(" -X -x enable / disable X11 forwarding\n");
printf(" -A -a enable / disable agent forwarding\n");
printf(" -t -T enable / disable pty allocation\n");
printf(" -1 -2 force use of particular protocol version\n");
+ printf(" -4 -6 force use of IPv4 or IPv6\n");
printf(" -C enable compression\n");
- printf(" -i key private key file for authentication\n");
+ printf(" -i key private key file for user authentication\n");
+ printf(" -noagent disable use of Pageant\n");
+ printf(" -agent enable use of Pageant\n");
+ printf(" -hostkey aa:bb:cc:...\n");
+ printf(" manually specify a host key (may be repeated)\n");
+ printf(" -m file read remote command(s) from file\n");
+ printf(" -s remote command is an SSH subsystem (SSH-2 only)\n");
+ printf(" -N don't start a shell/command (SSH-2 only)\n");
+ printf(" -nc host:port\n");
+ printf(" open tunnel in place of session (SSH-2 only)\n");
+ printf(" -sshlog file\n");
+ printf(" -sshrawlog file\n");
+ printf(" log protocol details to a file\n");
+ printf(" -shareexists\n");
+ printf(" test whether a connection-sharing upstream exists\n");
exit(1);
}
+static void version(void)
+{
+ char *buildinfo_text = buildinfo("\n");
+ printf("plink: %s\n%s\n", ver, buildinfo_text);
+ sfree(buildinfo_text);
+ exit(1);
+}
+
+void frontend_net_error_pending(void) {}
+
+const int share_can_be_downstream = TRUE;
+const int share_can_be_upstream = TRUE;
+
int main(int argc, char **argv)
{
int sending;
int connopen;
int exitcode;
int errors;
- void *ldisc, *logctx;
-
- ssh_get_line = console_get_line;
+ int use_subsystem = 0;
+ int got_host = FALSE;
+ int just_test_share_exists = FALSE;
+ unsigned long now;
+ struct winsize size;
fdlist = NULL;
fdcount = fdsize = 0;
default_protocol = PROT_SSH;
default_port = 22;
- flags = FLAG_STDERR;
+ bufchain_init(&stdout_data);
+ bufchain_init(&stderr_data);
+ outgoingeof = EOF_NO;
+
+ flags = FLAG_STDERR | FLAG_STDERR_TTY;
+
+ stderr_tty_init();
/*
* Process the command line.
*/
- do_defaults(NULL, &cfg);
- default_protocol = cfg.protocol;
- default_port = cfg.port;
+ conf = conf_new();
+ do_defaults(NULL, conf);
+ loaded_session = FALSE;
+ default_protocol = conf_get_int(conf, CONF_protocol);
+ default_port = conf_get_int(conf, CONF_port);
errors = 0;
{
/*
* Override the default protocol if PLINK_PROTOCOL is set.
*/
char *p = getenv("PLINK_PROTOCOL");
- int i;
if (p) {
- for (i = 0; backends[i].backend != NULL; i++) {
- if (!strcmp(backends[i].name, p)) {
- default_protocol = cfg.protocol = backends[i].protocol;
- default_port = cfg.port =
- backends[i].backend->default_port;
- break;
- }
+ const Backend *b = backend_from_name(p);
+ if (b) {
+ default_protocol = b->protocol;
+ default_port = b->default_port;
+ conf_set_int(conf, CONF_protocol, default_protocol);
+ conf_set_int(conf, CONF_port, default_port);
}
}
}
char *p = *++argv;
if (*p == '-') {
int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL),
- 1, &cfg);
+ 1, conf);
if (ret == -2) {
fprintf(stderr,
"plink: option \"%s\" requires an argument\n", p);
continue;
} else if (!strcmp(p, "-batch")) {
console_batch_mode = 1;
+ } else if (!strcmp(p, "-s")) {
+ /* Save status to write to conf later. */
+ use_subsystem = 1;
+ } else if (!strcmp(p, "-V") || !strcmp(p, "--version")) {
+ version();
+ } else if (!strcmp(p, "--help")) {
+ usage();
+ exit(0);
+ } else if (!strcmp(p, "-pgpfp")) {
+ pgp_fingerprints();
+ exit(1);
} else if (!strcmp(p, "-o")) {
if (argc <= 1) {
fprintf(stderr,
--argc;
provide_xrm_string(*++argv);
}
+ } else if (!strcmp(p, "-shareexists")) {
+ just_test_share_exists = TRUE;
+ } else if (!strcmp(p, "-fuzznet")) {
+ conf_set_int(conf, CONF_proxy_type, PROXY_FUZZ);
+ conf_set_str(conf, CONF_proxy_telnet_command,
+ "%host");
} else {
fprintf(stderr, "plink: unknown option \"%s\"\n", p);
errors = 1;
}
} else if (*p) {
- if (!*cfg.host) {
+ if (!conf_launchable(conf) || !(got_host || loaded_session)) {
char *q = p;
- do_defaults(NULL, &cfg);
-
/*
* If the hostname starts with "telnet:", set the
* protocol to Telnet and process the string as a
q += 7;
if (q[0] == '/' && q[1] == '/')
q += 2;
- cfg.protocol = PROT_TELNET;
+ conf_set_int(conf, CONF_protocol, PROT_TELNET);
p = q;
- while (*p && *p != ':' && *p != '/')
- p++;
+ p += host_strcspn(p, ":/");
c = *p;
if (*p)
*p++ = '\0';
if (c == ':')
- cfg.port = atoi(p);
+ conf_set_int(conf, CONF_port, atoi(p));
else
- cfg.port = -1;
- strncpy(cfg.host, q, sizeof(cfg.host) - 1);
- cfg.host[sizeof(cfg.host) - 1] = '\0';
+ conf_set_int(conf, CONF_port, -1);
+ conf_set_str(conf, CONF_host, q);
+ got_host = TRUE;
} else {
- char *r;
+ char *r, *user, *host;
/*
* Before we process the [user@]host string, we
* first check for the presence of a protocol
*/
r = strchr(p, ',');
if (r) {
- int i, j;
- for (i = 0; backends[i].backend != NULL; i++) {
- j = strlen(backends[i].name);
- if (j == r - p &&
- !memcmp(backends[i].name, p, j)) {
- default_protocol = cfg.protocol =
- backends[i].protocol;
- portnumber =
- backends[i].backend->default_port;
- p = r + 1;
- break;
- }
+ const Backend *b;
+ *r = '\0';
+ b = backend_from_name(p);
+ if (b) {
+ default_protocol = b->protocol;
+ conf_set_int(conf, CONF_protocol,
+ default_protocol);
+ portnumber = b->default_port;
}
+ p = r + 1;
}
/*
- * Three cases. Either (a) there's a nonzero
- * length string followed by an @, in which
- * case that's user and the remainder is host.
- * Or (b) there's only one string, not counting
- * a potential initial @, and it exists in the
- * saved-sessions database. Or (c) only one
- * string and it _doesn't_ exist in the
- * database.
+ * A nonzero length string followed by an @ is treated
+ * as a username. (We discount an _initial_ @.) The
+ * rest of the string (or the whole string if no @)
+ * is treated as a session name and/or hostname.
*/
r = strrchr(p, '@');
if (r == p)
p++, r = NULL; /* discount initial @ */
- if (r == NULL) {
- /*
- * One string.
- */
- Config cfg2;
- do_defaults(p, &cfg2);
- if (cfg2.host[0] == '\0') {
+ if (r) {
+ *r++ = '\0';
+ user = p, host = r;
+ } else {
+ user = NULL, host = p;
+ }
+
+ /*
+ * Now attempt to load a saved session with the
+ * same name as the hostname.
+ */
+ {
+ Conf *conf2 = conf_new();
+ do_defaults(host, conf2);
+ if (loaded_session || !conf_launchable(conf2)) {
/* No settings for this host; use defaults */
- strncpy(cfg.host, p, sizeof(cfg.host) - 1);
- cfg.host[sizeof(cfg.host) - 1] = '\0';
- cfg.port = default_port;
+ /* (or session was already loaded with -load) */
+ conf_set_str(conf, CONF_host, host);
+ conf_set_int(conf, CONF_port, default_port);
+ got_host = TRUE;
} else {
- cfg = cfg2;
- cfg.remote_cmd_ptr = cfg.remote_cmd;
+ conf_copy_into(conf, conf2);
+ loaded_session = TRUE;
}
- } else {
- *r++ = '\0';
- strncpy(cfg.username, p, sizeof(cfg.username) - 1);
- cfg.username[sizeof(cfg.username) - 1] = '\0';
- strncpy(cfg.host, r, sizeof(cfg.host) - 1);
- cfg.host[sizeof(cfg.host) - 1] = '\0';
- cfg.port = default_port;
+ conf_free(conf2);
+ }
+
+ if (user) {
+ /* Patch in specified username. */
+ conf_set_str(conf, CONF_username, user);
}
+
}
} else {
char *command;
}
if (cmdlen) command[--cmdlen]='\0';
/* change trailing blank to NUL */
- cfg.remote_cmd_ptr = command;
- cfg.remote_cmd_ptr2 = NULL;
- cfg.nopty = TRUE; /* command => no terminal */
+ conf_set_str(conf, CONF_remote_cmd, command);
+ conf_set_str(conf, CONF_remote_cmd2, "");
+ conf_set_int(conf, CONF_nopty, TRUE); /* command => no tty */
break; /* done with cmdline */
}
if (errors)
return 1;
- if (!*cfg.host) {
+ if (!conf_launchable(conf) || !(got_host || loaded_session)) {
usage();
}
/*
- * Trim leading whitespace off the hostname if it's there.
+ * Muck about with the hostname in various ways.
*/
{
- int space = strspn(cfg.host, " \t");
- memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space);
- }
+ char *hostbuf = dupstr(conf_get_str(conf, CONF_host));
+ char *host = hostbuf;
+ char *p, *q;
+
+ /*
+ * Trim leading whitespace.
+ */
+ host += strspn(host, " \t");
- /* See if host is of the form user@host */
- if (cfg.host[0] != '\0') {
- char *atsign = strchr(cfg.host, '@');
- /* Make sure we're not overflowing the user field */
- if (atsign) {
- if (atsign - cfg.host < sizeof cfg.username) {
- strncpy(cfg.username, cfg.host, atsign - cfg.host);
- cfg.username[atsign - cfg.host] = '\0';
+ /*
+ * See if host is of the form user@host, and separate out
+ * the username if so.
+ */
+ if (host[0] != '\0') {
+ char *atsign = strrchr(host, '@');
+ if (atsign) {
+ *atsign = '\0';
+ conf_set_str(conf, CONF_username, host);
+ host = atsign + 1;
}
- memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1));
}
+
+ /*
+ * Trim a colon suffix off the hostname if it's there. In
+ * order to protect unbracketed IPv6 address literals
+ * against this treatment, we do not do this if there's
+ * _more_ than one colon.
+ */
+ {
+ char *c = host_strchr(host, ':');
+
+ if (c) {
+ char *d = host_strchr(c+1, ':');
+ if (!d)
+ *c = '\0';
+ }
+ }
+
+ /*
+ * Remove any remaining whitespace.
+ */
+ p = hostbuf;
+ q = host;
+ while (*q) {
+ if (*q != ' ' && *q != '\t')
+ *p++ = *q;
+ q++;
+ }
+ *p = '\0';
+
+ conf_set_str(conf, CONF_host, hostbuf);
+ sfree(hostbuf);
}
/*
* Perform command-line overrides on session configuration.
*/
- cmdline_run_saved(&cfg);
+ cmdline_run_saved(conf);
/*
- * Trim a colon suffix off the hostname if it's there.
+ * If we have no better ideas for the remote username, use the local
+ * one, as 'ssh' does.
*/
- cfg.host[strcspn(cfg.host, ":")] = '\0';
+ if (conf_get_str(conf, CONF_username)[0] == '\0') {
+ char *user = get_username();
+ if (user) {
+ conf_set_str(conf, CONF_username, user);
+ sfree(user);
+ }
+ }
/*
- * Remove any remaining whitespace from the hostname.
+ * Apply subsystem status.
*/
- {
- int p1 = 0, p2 = 0;
- while (cfg.host[p2] != '\0') {
- if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') {
- cfg.host[p1] = cfg.host[p2];
- p1++;
- }
- p2++;
- }
- cfg.host[p1] = '\0';
- }
+ if (use_subsystem)
+ conf_set_int(conf, CONF_ssh_subsys, TRUE);
- if (!*cfg.remote_cmd_ptr)
+ if (!*conf_get_str(conf, CONF_remote_cmd) &&
+ !*conf_get_str(conf, CONF_remote_cmd2) &&
+ !*conf_get_str(conf, CONF_ssh_nc_host))
flags |= FLAG_INTERACTIVE;
/*
* Select protocol. This is farmed out into a table in a
* separate file to enable an ssh-free variant.
*/
- {
- int i;
- back = NULL;
- for (i = 0; backends[i].backend != NULL; i++)
- if (backends[i].protocol == cfg.protocol) {
- back = backends[i].backend;
- break;
- }
- if (back == NULL) {
- fprintf(stderr,
- "Internal fault: Unsupported protocol found\n");
- return 1;
- }
+ back = backend_from_proto(conf_get_int(conf, CONF_protocol));
+ if (back == NULL) {
+ fprintf(stderr,
+ "Internal fault: Unsupported protocol found\n");
+ return 1;
}
/*
* Select port.
*/
if (portnumber != -1)
- cfg.port = portnumber;
+ conf_set_int(conf, CONF_port, portnumber);
+
+ /*
+ * Block SIGPIPE, so that we'll get EPIPE individually on
+ * particular network connections that go wrong.
+ */
+ putty_signal(SIGPIPE, SIG_IGN);
/*
* Set up the pipe we'll use to tell us about SIGWINCH.
perror("pipe");
exit(1);
}
+ /* We don't want the signal handler to block if the pipe's full. */
+ nonblock(signalpipe[0]);
+ nonblock(signalpipe[1]);
+ cloexec(signalpipe[0]);
+ cloexec(signalpipe[1]);
putty_signal(SIGWINCH, sigwinch);
+ /*
+ * Now that we've got the SIGWINCH handler installed, try to find
+ * out the initial terminal size.
+ */
+ if (ioctl(STDIN_FILENO, TIOCGWINSZ, &size) >= 0) {
+ conf_set_int(conf, CONF_width, size.ws_col);
+ conf_set_int(conf, CONF_height, size.ws_row);
+ }
+
sk_init();
uxsel_init();
+ /*
+ * Plink doesn't provide any way to add forwardings after the
+ * connection is set up, so if there are none now, we can safely set
+ * the "simple" flag.
+ */
+ if (conf_get_int(conf, CONF_protocol) == PROT_SSH &&
+ !conf_get_int(conf, CONF_x11_forward) &&
+ !conf_get_int(conf, CONF_agentfwd) &&
+ !conf_get_str_nthstrkey(conf, CONF_portfwd, 0))
+ conf_set_int(conf, CONF_ssh_simple, TRUE);
+
+ if (just_test_share_exists) {
+ if (!back->test_for_upstream) {
+ fprintf(stderr, "Connection sharing not supported for connection "
+ "type '%s'\n", back->name);
+ return 1;
+ }
+ if (back->test_for_upstream(conf_get_str(conf, CONF_host),
+ conf_get_int(conf, CONF_port), conf))
+ return 0;
+ else
+ return 1;
+ }
+
/*
* Start up the connection.
*/
- logctx = log_init(NULL, &cfg);
+ logctx = log_init(NULL, conf);
console_provide_logctx(logctx);
{
const char *error;
char *realhost;
/* nodelay is only useful if stdin is a terminal device */
- int nodelay = cfg.tcp_nodelay && isatty(0);
-
- error = back->init(NULL, &backhandle, &cfg, cfg.host, cfg.port,
- &realhost, nodelay);
+ int nodelay = conf_get_int(conf, CONF_tcp_nodelay) && isatty(0);
+
+ /* This is a good place for a fuzzer to fork us. */
+#ifdef __AFL_HAVE_MANUAL_CONTROL
+ __AFL_INIT();
+#endif
+
+ error = back->init(NULL, &backhandle, conf,
+ conf_get_str(conf, CONF_host),
+ conf_get_int(conf, CONF_port),
+ &realhost, nodelay,
+ conf_get_int(conf, CONF_tcp_keepalives));
if (error) {
fprintf(stderr, "Unable to open connection:\n%s\n", error);
return 1;
}
back->provide_logctx(backhandle, logctx);
- ldisc = ldisc_create(&cfg, NULL, back, backhandle, NULL);
+ ldisc_create(conf, NULL, back, backhandle, NULL);
sfree(realhost);
}
connopen = 1;
* fails, because we know we aren't necessarily running in a
* console.
*/
- tcgetattr(0, &orig_termios);
+ local_tty = (tcgetattr(STDIN_FILENO, &orig_termios) == 0);
atexit(cleanup_termios);
- ldisc_update(NULL, 1, 1);
+ frontend_echoedit_update(NULL, 1, 1);
sending = FALSE;
+ now = GETTICKCOUNT();
while (1) {
fd_set rset, wset, xset;
int maxfd;
int rwx;
int ret;
+ unsigned long next;
FD_ZERO(&rset);
FD_ZERO(&wset);
FD_SET_MAX(signalpipe[0], maxfd, rset);
if (connopen && !sending &&
- back->socket(backhandle) != NULL &&
+ back->connected(backhandle) &&
back->sendok(backhandle) &&
back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) {
/* If we're OK to send, then try to read from stdin. */
- FD_SET_MAX(0, maxfd, rset);
+ FD_SET_MAX(STDIN_FILENO, maxfd, rset);
}
if (bufchain_size(&stdout_data) > 0) {
/* If we have data for stdout, try to write to stdout. */
- FD_SET_MAX(1, maxfd, wset);
+ FD_SET_MAX(STDOUT_FILENO, maxfd, wset);
}
if (bufchain_size(&stderr_data) > 0) {
/* If we have data for stderr, try to write to stderr. */
- FD_SET_MAX(2, maxfd, wset);
+ FD_SET_MAX(STDERR_FILENO, maxfd, wset);
}
/* Count the currently active fds. */
FD_SET_MAX(fd, maxfd, xset);
}
- do {
- ret = select(maxfd, &rset, &wset, &xset, NULL);
- } while (ret < 0 && errno == EINTR);
+ if (toplevel_callback_pending()) {
+ struct timeval tv;
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+ ret = select(maxfd, &rset, &wset, &xset, &tv);
+ } else if (run_timers(now, &next)) {
+ do {
+ unsigned long then;
+ long ticks;
+ struct timeval tv;
+
+ then = now;
+ now = GETTICKCOUNT();
+ if (now - then > next - then)
+ ticks = 0;
+ else
+ ticks = next - now;
+ tv.tv_sec = ticks / 1000;
+ tv.tv_usec = ticks % 1000 * 1000;
+ ret = select(maxfd, &rset, &wset, &xset, &tv);
+ if (ret == 0)
+ now = next;
+ else
+ now = GETTICKCOUNT();
+ } while (ret < 0 && errno == EINTR);
+ } else {
+ ret = select(maxfd, &rset, &wset, &xset, NULL);
+ }
+
+ if (ret < 0 && errno == EINTR)
+ continue;
if (ret < 0) {
perror("select");
if (FD_ISSET(signalpipe[0], &rset)) {
char c[1];
struct winsize size;
- read(signalpipe[0], c, 1); /* ignore its value; it'll be `x' */
- if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0)
+ if (read(signalpipe[0], c, 1) <= 0)
+ /* ignore error */;
+ /* ignore its value; it'll be `x' */
+ if (ioctl(STDIN_FILENO, TIOCGWINSZ, (void *)&size) >= 0)
back->size(backhandle, size.ws_col, size.ws_row);
}
- if (FD_ISSET(0, &rset)) {
+ if (FD_ISSET(STDIN_FILENO, &rset)) {
char buf[4096];
int ret;
- if (connopen && back->socket(backhandle) != NULL) {
- ret = read(0, buf, sizeof(buf));
+ if (connopen && back->connected(backhandle)) {
+ ret = read(STDIN_FILENO, buf, sizeof(buf));
if (ret < 0) {
perror("stdin: read");
exit(1);
back->special(backhandle, TS_EOF);
sending = FALSE; /* send nothing further after this */
} else {
- back->send(backhandle, buf, ret);
+ if (local_tty)
+ from_tty(buf, ret);
+ else
+ back->send(backhandle, buf, ret);
}
}
}
- if (FD_ISSET(1, &wset)) {
- try_output(0);
+ if (FD_ISSET(STDOUT_FILENO, &wset)) {
+ back->unthrottle(backhandle, try_output(FALSE));
}
- if (FD_ISSET(2, &wset)) {
- try_output(1);
+ if (FD_ISSET(STDERR_FILENO, &wset)) {
+ back->unthrottle(backhandle, try_output(TRUE));
}
- if ((!connopen || back->socket(backhandle) == NULL) &&
+ run_toplevel_callbacks();
+
+ if ((!connopen || !back->connected(backhandle)) &&
bufchain_size(&stdout_data) == 0 &&
bufchain_size(&stderr_data) == 0)
break; /* we closed the connection */