-#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#define TELOPT_AUTHENTICATION 37 /* Authenticate */
#define TELOPT_ENCRYPT 38 /* Encryption option */
#define TELOPT_NEW_ENVIRON 39 /* New - Environment variables */
+#define TELOPT_TN3270E 40 /* TN3270 enhancements */
+#define TELOPT_XAUTH 41
+#define TELOPT_CHARSET 42 /* Character set */
+#define TELOPT_RSP 43 /* Remote serial port */
+#define TELOPT_COM_PORT_OPTION 44 /* Com port control */
+#define TELOPT_SLE 45 /* Suppress local echo */
+#define TELOPT_STARTTLS 46 /* Start TLS */
+#define TELOPT_KERMIT 47 /* Automatic Kermit file transfer */
+#define TELOPT_SEND_URL 48
+#define TELOPT_FORWARD_X 49
+#define TELOPT_PRAGMA_LOGON 138
+#define TELOPT_SSPI_LOGON 139
+#define TELOPT_PRAGMA_HEARTBEAT 140
#define TELOPT_EXOPL 255 /* extended-options-list */
#define TELQUAL_IS 0 /* option is... */
#define LF 10
#define NUL 0
-#define iswritable(x) ( (x) != IAC && (x) != CR )
+#define iswritable(x) \
+ ( (x) != IAC && \
+ (telnet->opt_states[o_we_bin.index] == ACTIVE || (x) != CR))
static char *telopt(int opt)
{
i(AUTHENTICATION);
i(ENCRYPT);
i(NEW_ENVIRON);
+ i(TN3270E);
+ i(XAUTH);
+ i(CHARSET);
+ i(RSP);
+ i(COM_PORT_OPTION);
+ i(SLE);
+ i(STARTTLS);
+ i(KERMIT);
+ i(SEND_URL);
+ i(FORWARD_X);
+ i(PRAGMA_LOGON);
+ i(SSPI_LOGON);
+ i(PRAGMA_HEARTBEAT);
i(EXOPL);
#undef i
return "<unknown>";
OPTINDEX_ECHO,
OPTINDEX_WE_SGA,
OPTINDEX_THEY_SGA,
+ OPTINDEX_WE_BIN,
+ OPTINDEX_THEY_BIN,
NUM_OPTS
};
{ WILL, WONT, DO, DONT, TELOPT_SGA, OPTINDEX_WE_SGA, REQUESTED };
static const struct Opt o_they_sga =
{ DO, DONT, WILL, WONT, TELOPT_SGA, OPTINDEX_THEY_SGA, REQUESTED };
+static const struct Opt o_we_bin =
+ { WILL, WONT, DO, DONT, TELOPT_BINARY, OPTINDEX_WE_BIN, INACTIVE };
+static const struct Opt o_they_bin =
+ { DO, DONT, WILL, WONT, TELOPT_BINARY, OPTINDEX_THEY_BIN, INACTIVE };
static const struct Opt *const opts[] = {
&o_naws, &o_tspeed, &o_ttype, &o_oenv, &o_nenv, &o_echo,
- &o_we_sga, &o_they_sga, NULL
+ &o_we_sga, &o_they_sga, &o_we_bin, &o_they_bin, NULL
};
typedef struct telnet_tag {
int bufsize;
int in_synch;
int sb_opt, sb_len;
- char *sb_buf;
+ unsigned char *sb_buf;
int sb_size;
enum {
SEENSB, SUBNEGOT, SUBNEG_IAC, SEENCR
} state;
+ Config cfg;
} *Telnet;
#define TELNET_MAX_BACKLOG 4096
sk_set_frozen(telnet->s, backlog > TELNET_MAX_BACKLOG);
}
-static void log_option(char *sender, int cmd, int option)
+static void log_option(Telnet telnet, char *sender, int cmd, int option)
{
- char buf[50];
- sprintf(buf, "%s:\t%s %s", sender,
- (cmd == WILL ? "WILL" : cmd == WONT ? "WONT" :
- cmd == DO ? "DO" : cmd == DONT ? "DONT" : "<??>"),
- telopt(option));
- logevent(buf);
+ char *buf;
+ /*
+ * The strange-looking "<?""?>" below is there to avoid a
+ * trigraph - a double question mark followed by > maps to a
+ * closing brace character!
+ */
+ buf = dupprintf("%s:\t%s %s", sender,
+ (cmd == WILL ? "WILL" : cmd == WONT ? "WONT" :
+ cmd == DO ? "DO" : cmd == DONT ? "DONT" : "<?""?>"),
+ telopt(option));
+ logevent(telnet->frontend, buf);
+ sfree(buf);
}
static void send_opt(Telnet telnet, int cmd, int option)
b[0] = IAC;
b[1] = cmd;
b[2] = option;
- telnet->bufsize = sk_write(telnet->s, b, 3);
- log_option("client", cmd, option);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 3);
+ log_option(telnet, "client", cmd, option);
}
static void deactivate_option(Telnet telnet, const struct Opt *o)
{
const struct Opt *const *o;
- log_option("server", cmd, option);
+ log_option(telnet, "server", cmd, option);
for (o = opts; *o; o++) {
if ((*o)->option == option && (*o)->ack == cmd) {
switch (telnet->opt_states[(*o)->index]) {
switch (telnet->sb_opt) {
case TELOPT_TSPEED:
if (telnet->sb_len == 1 && telnet->sb_buf[0] == TELQUAL_SEND) {
- char logbuf[sizeof(cfg.termspeed) + 80];
+ char *logbuf;
b[0] = IAC;
b[1] = SB;
b[2] = TELOPT_TSPEED;
b[3] = TELQUAL_IS;
- strcpy(b + 4, cfg.termspeed);
- n = 4 + strlen(cfg.termspeed);
+ strcpy((char *)(b + 4), telnet->cfg.termspeed);
+ n = 4 + strlen(telnet->cfg.termspeed);
b[n] = IAC;
b[n + 1] = SE;
- telnet->bufsize = sk_write(telnet->s, b, n + 2);
- logevent("server:\tSB TSPEED SEND");
- sprintf(logbuf, "client:\tSB TSPEED IS %s", cfg.termspeed);
- logevent(logbuf);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, n + 2);
+ logevent(telnet->frontend, "server:\tSB TSPEED SEND");
+ logbuf = dupprintf("client:\tSB TSPEED IS %s", telnet->cfg.termspeed);
+ logevent(telnet->frontend, logbuf);
+ sfree(logbuf);
} else
- logevent("server:\tSB TSPEED <something weird>");
+ logevent(telnet->frontend, "server:\tSB TSPEED <something weird>");
break;
case TELOPT_TTYPE:
if (telnet->sb_len == 1 && telnet->sb_buf[0] == TELQUAL_SEND) {
- char logbuf[sizeof(cfg.termtype) + 80];
+ char *logbuf;
b[0] = IAC;
b[1] = SB;
b[2] = TELOPT_TTYPE;
b[3] = TELQUAL_IS;
- for (n = 0; cfg.termtype[n]; n++)
- b[n + 4] = (cfg.termtype[n] >= 'a'
- && cfg.termtype[n] <=
- 'z' ? cfg.termtype[n] + 'A' -
- 'a' : cfg.termtype[n]);
+ for (n = 0; telnet->cfg.termtype[n]; n++)
+ b[n + 4] = (telnet->cfg.termtype[n] >= 'a'
+ && telnet->cfg.termtype[n] <=
+ 'z' ? telnet->cfg.termtype[n] + 'A' -
+ 'a' : telnet->cfg.termtype[n]);
b[n + 4] = IAC;
b[n + 5] = SE;
- telnet->bufsize = sk_write(telnet->s, b, n + 6);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, n + 6);
b[n + 4] = 0;
- logevent("server:\tSB TTYPE SEND");
- sprintf(logbuf, "client:\tSB TTYPE IS %s", b + 4);
- logevent(logbuf);
+ logevent(telnet->frontend, "server:\tSB TTYPE SEND");
+ logbuf = dupprintf("client:\tSB TTYPE IS %s", b + 4);
+ logevent(telnet->frontend, logbuf);
+ sfree(logbuf);
} else
- logevent("server:\tSB TTYPE <something weird>\r\n");
+ logevent(telnet->frontend, "server:\tSB TTYPE <something weird>\r\n");
break;
case TELOPT_OLD_ENVIRON:
case TELOPT_NEW_ENVIRON:
p = telnet->sb_buf;
q = p + telnet->sb_len;
if (p < q && *p == TELQUAL_SEND) {
- char logbuf[50];
+ char *logbuf;
p++;
- sprintf(logbuf, "server:\tSB %s SEND", telopt(telnet->sb_opt));
- logevent(logbuf);
+ logbuf = dupprintf("server:\tSB %s SEND", telopt(telnet->sb_opt));
+ logevent(telnet->frontend, logbuf);
+ sfree(logbuf);
if (telnet->sb_opt == TELOPT_OLD_ENVIRON) {
- if (cfg.rfc_environ) {
+ if (telnet->cfg.rfc_environ) {
value = RFC_VALUE;
var = RFC_VAR;
} else {
b[2] = telnet->sb_opt;
b[3] = TELQUAL_IS;
n = 4;
- e = cfg.environmt;
+ e = telnet->cfg.environmt;
while (*e) {
b[n++] = var;
while (*e && *e != '\t')
b[n++] = *e++;
e++;
}
- if (*cfg.username) {
+ if (*telnet->cfg.username) {
b[n++] = var;
b[n++] = 'U';
b[n++] = 'S';
b[n++] = 'E';
b[n++] = 'R';
b[n++] = value;
- e = cfg.username;
+ e = telnet->cfg.username;
while (*e)
b[n++] = *e++;
}
b[n++] = IAC;
b[n++] = SE;
- telnet->bufsize = sk_write(telnet->s, b, n);
- sprintf(logbuf, "client:\tSB %s IS %s", telopt(telnet->sb_opt),
- n == 6 ? "<nothing>" : "<stuff>");
- logevent(logbuf);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, n);
+ logbuf = dupprintf("client:\tSB %s IS %s", telopt(telnet->sb_opt),
+ n == 6 ? "<nothing>" : "<stuff>");
+ logevent(telnet->frontend, logbuf);
+ sfree(logbuf);
}
break;
}
else if (c == DM)
telnet->in_synch = 0;
#endif
- if (c == CR)
+ if (c == CR && telnet->opt_states[o_they_bin.index] != ACTIVE)
telnet->state = SEENCR;
else
telnet->state = TOP_LEVEL;
else {
subneg_addchar:
if (telnet->sb_len >= telnet->sb_size) {
- char *newbuf;
telnet->sb_size += SB_DELTA;
- newbuf = (telnet->sb_buf ?
- srealloc(telnet->sb_buf, telnet->sb_size) :
- smalloc(telnet->sb_size));
- if (newbuf)
- telnet->sb_buf = newbuf;
- else
- telnet->sb_size -= SB_DELTA;
+ telnet->sb_buf = sresize(telnet->sb_buf, telnet->sb_size,
+ unsigned char);
}
- if (telnet->sb_len < telnet->sb_size)
- telnet->sb_buf[telnet->sb_len++] = c;
+ telnet->sb_buf[telnet->sb_len++] = c;
telnet->state = SUBNEGOT; /* in case we came here by goto */
}
break;
}
}
-static int telnet_closing(Plug plug, char *error_msg, int error_code,
+static int telnet_closing(Plug plug, const char *error_msg, int error_code,
int calling_back)
{
Telnet telnet = (Telnet) plug;
}
if (error_msg) {
/* A socket error has occurred. */
- logevent(error_msg);
- connection_fatal("%s", error_msg);
+ logevent(telnet->frontend, error_msg);
+ connection_fatal(telnet->frontend, "%s", error_msg);
} /* Otherwise, the remote side closed the connection normally. */
return 0;
}
* Also places the canonical host name into `realhost'. It must be
* freed by the caller.
*/
-static char *telnet_init(void *frontend_handle, void **backend_handle,
- char *host, int port, char **realhost, int nodelay)
+static const char *telnet_init(void *frontend_handle, void **backend_handle,
+ Config *cfg,
+ char *host, int port, char **realhost,
+ int nodelay, int keepalive)
{
static const struct plug_function_table fn_table = {
telnet_closing,
telnet_sent
};
SockAddr addr;
- char *err;
+ const char *err;
Telnet telnet;
- telnet = smalloc(sizeof(*telnet));
+ telnet = snew(struct telnet_tag);
telnet->fn = &fn_table;
+ telnet->cfg = *cfg; /* STRUCTURE COPY */
telnet->s = NULL;
telnet->echoing = TRUE;
telnet->editing = TRUE;
telnet->sb_buf = NULL;
telnet->sb_size = 0;
telnet->frontend = frontend_handle;
- telnet->term_width = cfg.width;
- telnet->term_height = cfg.height;
+ telnet->term_width = telnet->cfg.width;
+ telnet->term_height = telnet->cfg.height;
telnet->state = TOP_LEVEL;
*backend_handle = telnet;
* Try to find host.
*/
{
- char buf[200];
- sprintf(buf, "Looking up host \"%.170s\"", host);
- logevent(buf);
+ char *buf;
+ buf = dupprintf("Looking up host \"%s\"", host);
+ logevent(telnet->frontend, buf);
+ sfree(buf);
}
- addr = sk_namelookup(host, realhost);
- if ((err = sk_addr_error(addr)))
+ addr = name_lookup(host, port, realhost, &telnet->cfg);
+ if ((err = sk_addr_error(addr)) != NULL) {
+ sk_addr_free(addr);
return err;
+ }
if (port < 0)
port = 23; /* default telnet port */
* Open socket.
*/
{
- char buf[200], addrbuf[100];
+ char *buf, addrbuf[100];
sk_getaddr(addr, addrbuf, 100);
- sprintf(buf, "Connecting to %.100s port %d", addrbuf, port);
- logevent(buf);
+ buf = dupprintf("Connecting to %s port %d", addrbuf, port);
+ logevent(telnet->frontend, buf);
+ sfree(buf);
}
telnet->s = new_connection(addr, *realhost, port, 0, 1,
- nodelay, (Plug) telnet);
- if ((err = sk_socket_error(telnet->s)))
+ nodelay, keepalive, (Plug) telnet, &telnet->cfg);
+ if ((err = sk_socket_error(telnet->s)) != NULL)
return err;
- sk_addr_free(addr);
-
/*
* Initialise option states.
*/
- if (cfg.passive_telnet) {
+ if (telnet->cfg.passive_telnet) {
const struct Opt *const *o;
for (o = opts; *o; o++)
return NULL;
}
+static void telnet_free(void *handle)
+{
+ Telnet telnet = (Telnet) handle;
+
+ sfree(telnet->sb_buf);
+ if (telnet->s)
+ sk_close(telnet->s);
+ sfree(telnet);
+}
+/*
+ * Reconfigure the Telnet backend. There's no immediate action
+ * necessary, in this backend: we just save the fresh config for
+ * any subsequent negotiations.
+ */
+static void telnet_reconfig(void *handle, Config *cfg)
+{
+ Telnet telnet = (Telnet) handle;
+ telnet->cfg = *cfg; /* STRUCTURE COPY */
+}
+
/*
* Called to send data down the Telnet connection.
*/
static int telnet_send(void *handle, char *buf, int len)
{
Telnet telnet = (Telnet) handle;
- char *p;
- static unsigned char iac[2] = { IAC, IAC };
- static unsigned char cr[2] = { CR, NUL };
+ unsigned char *p, *end;
+ static const unsigned char iac[2] = { IAC, IAC };
+ static const unsigned char cr[2] = { CR, NUL };
#if 0
- static unsigned char nl[2] = { CR, LF };
+ static const unsigned char nl[2] = { CR, LF };
#endif
if (telnet->s == NULL)
return 0;
- p = buf;
- while (p < buf + len) {
- char *q = p;
+ p = (unsigned char *)buf;
+ end = (unsigned char *)(buf + len);
+ while (p < end) {
+ unsigned char *q = p;
- while (iswritable((unsigned char) *p) && p < buf + len)
+ while (p < end && iswritable(*p))
p++;
- telnet->bufsize = sk_write(telnet->s, q, p - q);
+ telnet->bufsize = sk_write(telnet->s, (char *)q, p - q);
- while (p < buf + len && !iswritable((unsigned char) *p)) {
+ while (p < end && !iswritable(*p)) {
telnet->bufsize =
- sk_write(telnet->s, (unsigned char) *p == IAC ? iac : cr, 2);
+ sk_write(telnet->s, (char *)(*p == IAC ? iac : cr), 2);
p++;
}
}
static void telnet_size(void *handle, int width, int height)
{
Telnet telnet = (Telnet) handle;
- unsigned char b[16];
- char logbuf[50];
+ unsigned char b[24];
+ int n;
+ char *logbuf;
telnet->term_width = width;
telnet->term_height = height;
if (telnet->s == NULL || telnet->opt_states[o_naws.index] != ACTIVE)
return;
- b[0] = IAC;
- b[1] = SB;
- b[2] = TELOPT_NAWS;
- b[3] = telnet->term_width >> 8;
- b[4] = telnet->term_width & 0xFF;
- b[5] = telnet->term_height >> 8;
- b[6] = telnet->term_height & 0xFF;
- b[7] = IAC;
- b[8] = SE;
- telnet->bufsize = sk_write(telnet->s, b, 9);
- sprintf(logbuf, "client:\tSB NAWS %d,%d",
- ((unsigned char) b[3] << 8) + (unsigned char) b[4],
- ((unsigned char) b[5] << 8) + (unsigned char) b[6]);
- logevent(logbuf);
+ n = 0;
+ b[n++] = IAC;
+ b[n++] = SB;
+ b[n++] = TELOPT_NAWS;
+ b[n++] = telnet->term_width >> 8;
+ if (b[n-1] == IAC) b[n++] = IAC; /* duplicate any IAC byte occurs */
+ b[n++] = telnet->term_width & 0xFF;
+ if (b[n-1] == IAC) b[n++] = IAC; /* duplicate any IAC byte occurs */
+ b[n++] = telnet->term_height >> 8;
+ if (b[n-1] == IAC) b[n++] = IAC; /* duplicate any IAC byte occurs */
+ b[n++] = telnet->term_height & 0xFF;
+ if (b[n-1] == IAC) b[n++] = IAC; /* duplicate any IAC byte occurs */
+ b[n++] = IAC;
+ b[n++] = SE;
+ telnet->bufsize = sk_write(telnet->s, (char *)b, n);
+ logbuf = dupprintf("client:\tSB NAWS %d,%d",
+ telnet->term_width, telnet->term_height);
+ logevent(telnet->frontend, logbuf);
+ sfree(logbuf);
}
/*
switch (code) {
case TS_AYT:
b[1] = AYT;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_BRK:
b[1] = BREAK;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_EC:
b[1] = EC;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_EL:
b[1] = EL;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_GA:
b[1] = GA;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_NOP:
b[1] = NOP;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_ABORT:
b[1] = ABORT;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_AO:
b[1] = AO;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_IP:
b[1] = IP;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_SUSP:
b[1] = SUSP;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_EOR:
b[1] = EOR;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_EOF:
b[1] = xEOF;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
break;
case TS_EOL:
- telnet->bufsize = sk_write(telnet->s, "\r\n", 2);
+ /* In BINARY mode, CR-LF becomes just CR -
+ * and without the NUL suffix too. */
+ if (telnet->opt_states[o_we_bin.index] == ACTIVE)
+ telnet->bufsize = sk_write(telnet->s, "\r", 1);
+ else
+ telnet->bufsize = sk_write(telnet->s, "\r\n", 2);
break;
case TS_SYNCH:
b[1] = DM;
- telnet->bufsize = sk_write(telnet->s, b, 1);
- telnet->bufsize = sk_write_oob(telnet->s, b + 1, 1);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 1);
+ telnet->bufsize = sk_write_oob(telnet->s, (char *)(b + 1), 1);
break;
case TS_RECHO:
if (telnet->opt_states[o_echo.index] == INACTIVE ||
case TS_PING:
if (telnet->opt_states[o_they_sga.index] == ACTIVE) {
b[1] = NOP;
- telnet->bufsize = sk_write(telnet->s, b, 2);
+ telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
}
break;
}
}
+static const struct telnet_special *telnet_get_specials(void *handle)
+{
+ static const struct telnet_special specials[] = {
+ {"Are You There", TS_AYT},
+ {"Break", TS_BRK},
+ {"Synch", TS_SYNCH},
+ {"Erase Character", TS_EC},
+ {"Erase Line", TS_EL},
+ {"Go Ahead", TS_GA},
+ {"No Operation", TS_NOP},
+ {"", 0},
+ {"Abort Process", TS_ABORT},
+ {"Abort Output", TS_AO},
+ {"Interrupt Process", TS_IP},
+ {"Suspend Process", TS_SUSP},
+ {"", 0},
+ {"End Of Record", TS_EOR},
+ {"End Of File", TS_EOF},
+ {NULL, 0}
+ };
+ return specials;
+}
+
static Socket telnet_socket(void *handle)
{
Telnet telnet = (Telnet) handle;
static int telnet_sendok(void *handle)
{
- Telnet telnet = (Telnet) handle;
+ /* Telnet telnet = (Telnet) handle; */
return 1;
}
telnet->ldisc = ldisc;
}
+static void telnet_provide_logctx(void *handle, void *logctx)
+{
+ /* This is a stub. */
+}
+
static int telnet_exitcode(void *handle)
{
Telnet telnet = (Telnet) handle;
- /* Telnet doesn't transmit exit codes back to the client */
- return 0;
+ if (telnet->s != NULL)
+ return -1; /* still connected */
+ else
+ /* Telnet doesn't transmit exit codes back to the client */
+ return 0;
}
Backend telnet_backend = {
telnet_init,
+ telnet_free,
+ telnet_reconfig,
telnet_send,
telnet_sendbuffer,
telnet_size,
telnet_special,
+ telnet_get_specials,
telnet_socket,
telnet_exitcode,
telnet_sendok,
telnet_ldisc,
telnet_provide_ldisc,
+ telnet_provide_logctx,
telnet_unthrottle,
23
};
projects / u / mdw / putty / blobdiff