#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
-#include <winsock.h>
#include "putty.h"
#define TRUE 1
#endif
-static SOCKET s = INVALID_SOCKET;
-
-#define IAC 255 /* interpret as command: */
-#define DONT 254 /* you are not to use option */
-#define DO 253 /* please, you use option */
-#define WONT 252 /* I won't use option */
-#define WILL 251 /* I will use option */
-#define SB 250 /* interpret as subnegotiation */
-#define SE 240 /* end sub negotiation */
-
-#define GA 249 /* you may reverse the line */
-#define EL 248 /* erase the current line */
-#define EC 247 /* erase the current character */
-#define AYT 246 /* are you there */
-#define AO 245 /* abort output--but let prog finish */
-#define IP 244 /* interrupt process--permanently */
-#define BREAK 243 /* break */
-#define DM 242 /* data mark--for connect. cleaning */
-#define NOP 241 /* nop */
-#define EOR 239 /* end of record (transparent mode) */
-#define ABORT 238 /* Abort process */
-#define SUSP 237 /* Suspend process */
-#define xEOF 236 /* End of file: EOF is already used... */
-
-#define TELOPT_BINARY 0 /* 8-bit data path */
-#define TELOPT_ECHO 1 /* echo */
-#define TELOPT_RCP 2 /* prepare to reconnect */
-#define TELOPT_SGA 3 /* suppress go ahead */
-#define TELOPT_NAMS 4 /* approximate message size */
-#define TELOPT_STATUS 5 /* give status */
-#define TELOPT_TM 6 /* timing mark */
-#define TELOPT_RCTE 7 /* remote controlled transmission and echo */
-#define TELOPT_NAOL 8 /* negotiate about output line width */
-#define TELOPT_NAOP 9 /* negotiate about output page size */
-#define TELOPT_NAOCRD 10 /* negotiate about CR disposition */
-#define TELOPT_NAOHTS 11 /* negotiate about horizontal tabstops */
-#define TELOPT_NAOHTD 12 /* negotiate about horizontal tab disposition */
-#define TELOPT_NAOFFD 13 /* negotiate about formfeed disposition */
-#define TELOPT_NAOVTS 14 /* negotiate about vertical tab stops */
-#define TELOPT_NAOVTD 15 /* negotiate about vertical tab disposition */
-#define TELOPT_NAOLFD 16 /* negotiate about output LF disposition */
-#define TELOPT_XASCII 17 /* extended ascic character set */
-#define TELOPT_LOGOUT 18 /* force logout */
-#define TELOPT_BM 19 /* byte macro */
-#define TELOPT_DET 20 /* data entry terminal */
-#define TELOPT_SUPDUP 21 /* supdup protocol */
-#define TELOPT_SUPDUPOUTPUT 22 /* supdup output */
-#define TELOPT_SNDLOC 23 /* send location */
-#define TELOPT_TTYPE 24 /* terminal type */
-#define TELOPT_EOR 25 /* end or record */
-#define TELOPT_TUID 26 /* TACACS user identification */
-#define TELOPT_OUTMRK 27 /* output marking */
-#define TELOPT_TTYLOC 28 /* terminal location number */
-#define TELOPT_3270REGIME 29 /* 3270 regime */
-#define TELOPT_X3PAD 30 /* X.3 PAD */
-#define TELOPT_NAWS 31 /* window size */
-#define TELOPT_TSPEED 32 /* terminal speed */
-#define TELOPT_LFLOW 33 /* remote flow control */
-#define TELOPT_LINEMODE 34 /* Linemode option */
-#define TELOPT_XDISPLOC 35 /* X Display Location */
-#define TELOPT_OLD_ENVIRON 36 /* Old - Environment variables */
-#define TELOPT_AUTHENTICATION 37/* Authenticate */
-#define TELOPT_ENCRYPT 38 /* Encryption option */
-#define TELOPT_NEW_ENVIRON 39 /* New - Environment variables */
-#define TELOPT_EXOPL 255 /* extended-options-list */
-
-#define TELQUAL_IS 0 /* option is... */
-#define TELQUAL_SEND 1 /* send option */
-#define TELQUAL_INFO 2 /* ENVIRON: informational version of IS */
+static Socket s = NULL;
+
+#define IAC 255 /* interpret as command: */
+#define DONT 254 /* you are not to use option */
+#define DO 253 /* please, you use option */
+#define WONT 252 /* I won't use option */
+#define WILL 251 /* I will use option */
+#define SB 250 /* interpret as subnegotiation */
+#define SE 240 /* end sub negotiation */
+
+#define GA 249 /* you may reverse the line */
+#define EL 248 /* erase the current line */
+#define EC 247 /* erase the current character */
+#define AYT 246 /* are you there */
+#define AO 245 /* abort output--but let prog finish */
+#define IP 244 /* interrupt process--permanently */
+#define BREAK 243 /* break */
+#define DM 242 /* data mark--for connect. cleaning */
+#define NOP 241 /* nop */
+#define EOR 239 /* end of record (transparent mode) */
+#define ABORT 238 /* Abort process */
+#define SUSP 237 /* Suspend process */
+#define xEOF 236 /* End of file: EOF is already used... */
+
+#define TELOPT_BINARY 0 /* 8-bit data path */
+#define TELOPT_ECHO 1 /* echo */
+#define TELOPT_RCP 2 /* prepare to reconnect */
+#define TELOPT_SGA 3 /* suppress go ahead */
+#define TELOPT_NAMS 4 /* approximate message size */
+#define TELOPT_STATUS 5 /* give status */
+#define TELOPT_TM 6 /* timing mark */
+#define TELOPT_RCTE 7 /* remote controlled transmission and echo */
+#define TELOPT_NAOL 8 /* negotiate about output line width */
+#define TELOPT_NAOP 9 /* negotiate about output page size */
+#define TELOPT_NAOCRD 10 /* negotiate about CR disposition */
+#define TELOPT_NAOHTS 11 /* negotiate about horizontal tabstops */
+#define TELOPT_NAOHTD 12 /* negotiate about horizontal tab disposition */
+#define TELOPT_NAOFFD 13 /* negotiate about formfeed disposition */
+#define TELOPT_NAOVTS 14 /* negotiate about vertical tab stops */
+#define TELOPT_NAOVTD 15 /* negotiate about vertical tab disposition */
+#define TELOPT_NAOLFD 16 /* negotiate about output LF disposition */
+#define TELOPT_XASCII 17 /* extended ascic character set */
+#define TELOPT_LOGOUT 18 /* force logout */
+#define TELOPT_BM 19 /* byte macro */
+#define TELOPT_DET 20 /* data entry terminal */
+#define TELOPT_SUPDUP 21 /* supdup protocol */
+#define TELOPT_SUPDUPOUTPUT 22 /* supdup output */
+#define TELOPT_SNDLOC 23 /* send location */
+#define TELOPT_TTYPE 24 /* terminal type */
+#define TELOPT_EOR 25 /* end or record */
+#define TELOPT_TUID 26 /* TACACS user identification */
+#define TELOPT_OUTMRK 27 /* output marking */
+#define TELOPT_TTYLOC 28 /* terminal location number */
+#define TELOPT_3270REGIME 29 /* 3270 regime */
+#define TELOPT_X3PAD 30 /* X.3 PAD */
+#define TELOPT_NAWS 31 /* window size */
+#define TELOPT_TSPEED 32 /* terminal speed */
+#define TELOPT_LFLOW 33 /* remote flow control */
+#define TELOPT_LINEMODE 34 /* Linemode option */
+#define TELOPT_XDISPLOC 35 /* X Display Location */
+#define TELOPT_OLD_ENVIRON 36 /* Old - Environment variables */
+#define TELOPT_AUTHENTICATION 37 /* Authenticate */
+#define TELOPT_ENCRYPT 38 /* Encryption option */
+#define TELOPT_NEW_ENVIRON 39 /* New - Environment variables */
+#define TELOPT_EXOPL 255 /* extended-options-list */
+
+#define TELQUAL_IS 0 /* option is... */
+#define TELQUAL_SEND 1 /* send option */
+#define TELQUAL_INFO 2 /* ENVIRON: informational version of IS */
#define BSD_VAR 1
#define BSD_VALUE 0
#define RFC_VAR 0
#define iswritable(x) ( (x) != IAC && (x) != CR )
-static char *telopt(int opt) {
+static char *telopt(int opt)
+{
#define i(x) if (opt == TELOPT_ ## x) return #x;
- i(BINARY); i(ECHO); i(RCP); i(SGA); i(NAMS); i(STATUS); i(TM); i(RCTE);
- i(NAOL); i(NAOP); i(NAOCRD); i(NAOHTS); i(NAOHTD); i(NAOFFD); i(NAOVTS);
- i(NAOVTD); i(NAOLFD); i(XASCII); i(LOGOUT); i(BM); i(DET); i(SUPDUP);
- i(SUPDUPOUTPUT); i(SNDLOC); i(TTYPE); i(EOR); i(TUID); i(OUTMRK);
- i(TTYLOC); i(X3PAD); i(NAWS); i(TSPEED); i(LFLOW); i(LINEMODE);
- i(XDISPLOC); i(OLD_ENVIRON); i(AUTHENTICATION); i(ENCRYPT);
- i(NEW_ENVIRON); i(EXOPL);
+ i(BINARY);
+ i(ECHO);
+ i(RCP);
+ i(SGA);
+ i(NAMS);
+ i(STATUS);
+ i(TM);
+ i(RCTE);
+ i(NAOL);
+ i(NAOP);
+ i(NAOCRD);
+ i(NAOHTS);
+ i(NAOHTD);
+ i(NAOFFD);
+ i(NAOVTS);
+ i(NAOVTD);
+ i(NAOLFD);
+ i(XASCII);
+ i(LOGOUT);
+ i(BM);
+ i(DET);
+ i(SUPDUP);
+ i(SUPDUPOUTPUT);
+ i(SNDLOC);
+ i(TTYPE);
+ i(EOR);
+ i(TUID);
+ i(OUTMRK);
+ i(TTYLOC);
+ i(X3PAD);
+ i(NAWS);
+ i(TSPEED);
+ i(LFLOW);
+ i(LINEMODE);
+ i(XDISPLOC);
+ i(OLD_ENVIRON);
+ i(AUTHENTICATION);
+ i(ENCRYPT);
+ i(NEW_ENVIRON);
+ i(EXOPL);
#undef i
return "<unknown>";
}
} state;
};
-static struct Opt o_naws = {WILL, WONT, DO, DONT, TELOPT_NAWS, REQUESTED};
-static struct Opt o_tspeed = {WILL, WONT, DO, DONT, TELOPT_TSPEED, REQUESTED};
-static struct Opt o_ttype = {WILL, WONT, DO, DONT, TELOPT_TTYPE, REQUESTED};
-static struct Opt o_oenv = {WILL, WONT, DO, DONT, TELOPT_OLD_ENVIRON,
- INACTIVE};
-static struct Opt o_nenv = {WILL, WONT, DO, DONT, TELOPT_NEW_ENVIRON,
- REQUESTED};
-static struct Opt o_echo = {DO, DONT, WILL, WONT, TELOPT_ECHO, REQUESTED};
-static struct Opt o_we_sga = {WILL, WONT, DO, DONT, TELOPT_SGA, REQUESTED};
-static struct Opt o_they_sga = {DO, DONT, WILL, WONT, TELOPT_SGA, REQUESTED};
+static struct Opt o_naws =
+ { WILL, WONT, DO, DONT, TELOPT_NAWS, REQUESTED };
+static struct Opt o_tspeed =
+ { WILL, WONT, DO, DONT, TELOPT_TSPEED, REQUESTED };
+static struct Opt o_ttype =
+ { WILL, WONT, DO, DONT, TELOPT_TTYPE, REQUESTED };
+static struct Opt o_oenv = { WILL, WONT, DO, DONT, TELOPT_OLD_ENVIRON,
+ INACTIVE
+};
+static struct Opt o_nenv = { WILL, WONT, DO, DONT, TELOPT_NEW_ENVIRON,
+ REQUESTED
+};
+static struct Opt o_echo =
+ { DO, DONT, WILL, WONT, TELOPT_ECHO, REQUESTED };
+static struct Opt o_we_sga =
+ { WILL, WONT, DO, DONT, TELOPT_SGA, REQUESTED };
+static struct Opt o_they_sga =
+ { DO, DONT, WILL, WONT, TELOPT_SGA, REQUESTED };
static struct Opt *opts[] = {
&o_naws, &o_tspeed, &o_ttype, &o_oenv, &o_nenv, &o_echo,
&o_we_sga, &o_they_sga, NULL
};
-#if 0
-static int in_synch;
-#endif
+#define TELNET_MAX_BACKLOG 4096
+static int echoing = TRUE, editing = TRUE;
+static int activated = FALSE;
+static int telnet_bufsize;
+static int in_synch;
static int sb_opt, sb_len;
static char *sb_buf = NULL;
static int sb_size = 0;
#define SB_DELTA 1024
-static void try_write (void) {
- while (outbuf_head != outbuf_reap) {
- int end = (outbuf_reap < outbuf_head ? outbuf_head : OUTBUF_SIZE);
- int len = end - outbuf_reap;
- int ret;
-
- ret = send (s, outbuf+outbuf_reap, len, 0);
- if (ret > 0)
- outbuf_reap = (outbuf_reap + ret) & OUTBUF_MASK;
- if (ret < len)
- return;
- }
+static void c_write1(int c)
+{
+ int backlog;
+ char cc = (char) c;
+ backlog = from_backend(0, &cc, 1);
+ sk_set_frozen(s, backlog > TELNET_MAX_BACKLOG);
}
-static void s_write (void *buf, int len) {
- unsigned char *p = buf;
- while (len--) {
- int new_head = (outbuf_head + 1) & OUTBUF_MASK;
- if (new_head != outbuf_reap) {
- outbuf[outbuf_head] = *p++;
- outbuf_head = new_head;
- }
- }
- try_write();
-}
-
-static void c_write (char *buf, int len) {
- while (len--) {
- int new_head = (inbuf_head + 1) & INBUF_MASK;
- int c = (unsigned char) *buf;
- if (new_head != inbuf_reap) {
- inbuf[inbuf_head] = *buf++;
- inbuf_head = new_head;
- }
- }
-}
-
-static void log_option (char *sender, int cmd, int option) {
+static void log_option(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));
- lognegot(buf);
+ logevent(buf);
}
-static void send_opt (int cmd, int option) {
+static void send_opt(int cmd, int option)
+{
unsigned char b[3];
- b[0] = IAC; b[1] = cmd; b[2] = option;
- s_write (b, 3);
+ b[0] = IAC;
+ b[1] = cmd;
+ b[2] = option;
+ telnet_bufsize = sk_write(s, b, 3);
log_option("client", cmd, option);
}
-static void deactivate_option (struct Opt *o) {
+static void deactivate_option(struct Opt *o)
+{
if (o->state == REQUESTED || o->state == ACTIVE)
- send_opt (o->nsend, o->option);
+ send_opt(o->nsend, o->option);
o->state = REALLY_INACTIVE;
}
-static void activate_option (struct Opt *o) {
+/*
+ * Generate side effects of enabling or disabling an option.
+ */
+static void option_side_effects(struct Opt *o, int enabled)
+{
+ if (o->option == TELOPT_ECHO && o->send == DO)
+ echoing = !enabled;
+ else if (o->option == TELOPT_SGA && o->send == DO)
+ editing = !enabled;
+ ldisc_send(NULL, 0); /* cause ldisc to notice the change */
+
+ /* Ensure we get the minimum options */
+ if (!activated) {
+ if (o_echo.state == INACTIVE) {
+ o_echo.state = REQUESTED;
+ send_opt(o_echo.send, o_echo.option);
+ }
+ if (o_we_sga.state == INACTIVE) {
+ o_we_sga.state = REQUESTED;
+ send_opt(o_we_sga.send, o_we_sga.option);
+ }
+ if (o_they_sga.state == INACTIVE) {
+ o_they_sga.state = REQUESTED;
+ send_opt(o_they_sga.send, o_they_sga.option);
+ }
+ activated = TRUE;
+ }
+}
+
+static void activate_option(struct Opt *o)
+{
if (o->send == WILL && o->option == TELOPT_NAWS)
telnet_size();
if (o->send == WILL &&
* We may only have one kind of ENVIRON going at a time.
* This is a hack, but who cares.
*/
- deactivate_option (o->option==TELOPT_NEW_ENVIRON ? &o_oenv : &o_nenv);
+ deactivate_option(o->option ==
+ TELOPT_NEW_ENVIRON ? &o_oenv : &o_nenv);
}
+ option_side_effects(o, 1);
}
-static void refused_option (struct Opt *o) {
+static void refused_option(struct Opt *o)
+{
if (o->send == WILL && o->option == TELOPT_NEW_ENVIRON &&
o_oenv.state == INACTIVE) {
- send_opt (WILL, TELOPT_OLD_ENVIRON);
+ send_opt(WILL, TELOPT_OLD_ENVIRON);
o_oenv.state = REQUESTED;
}
+ option_side_effects(o, 0);
}
-static void proc_rec_opt (int cmd, int option) {
+static void proc_rec_opt(int cmd, int option)
+{
struct Opt **o;
- log_option ("server", cmd, option);
+ log_option("server", cmd, option);
for (o = opts; *o; o++) {
if ((*o)->option == option && (*o)->ack == cmd) {
switch ((*o)->state) {
case REQUESTED:
(*o)->state = ACTIVE;
- activate_option (*o);
+ activate_option(*o);
break;
case ACTIVE:
break;
case INACTIVE:
(*o)->state = ACTIVE;
- send_opt ((*o)->send, option);
- activate_option (*o);
+ send_opt((*o)->send, option);
+ activate_option(*o);
break;
case REALLY_INACTIVE:
- send_opt ((*o)->nsend, option);
+ send_opt((*o)->nsend, option);
break;
}
return;
switch ((*o)->state) {
case REQUESTED:
(*o)->state = INACTIVE;
- refused_option (*o);
+ refused_option(*o);
break;
case ACTIVE:
(*o)->state = INACTIVE;
- send_opt ((*o)->nsend, option);
+ send_opt((*o)->nsend, option);
+ option_side_effects(*o, 0);
break;
case INACTIVE:
case REALLY_INACTIVE:
* If we reach here, the option was one we weren't prepared to
* cope with. So send a negative ack.
*/
- send_opt ((cmd == WILL ? DONT : WONT), option);
+ send_opt((cmd == WILL ? DONT : WONT), option);
}
-static void process_subneg (void) {
+static void process_subneg(void)
+{
unsigned char b[2048], *p, *q;
int var, value, n;
char *e;
switch (sb_opt) {
case TELOPT_TSPEED:
if (sb_len == 1 && sb_buf[0] == TELQUAL_SEND) {
- char logbuf[sizeof(cfg.termspeed)+80];
- b[0] = IAC; b[1] = SB; b[2] = TELOPT_TSPEED;
+ char logbuf[sizeof(cfg.termspeed) + 80];
+ b[0] = IAC;
+ b[1] = SB;
+ b[2] = TELOPT_TSPEED;
b[3] = TELQUAL_IS;
- strcpy(b+4, cfg.termspeed);
+ strcpy(b + 4, cfg.termspeed);
n = 4 + strlen(cfg.termspeed);
- b[n] = IAC; b[n+1] = SE;
- s_write (b, n+2);
- lognegot("server:\tSB TSPEED SEND");
+ b[n] = IAC;
+ b[n + 1] = SE;
+ telnet_bufsize = sk_write(s, b, n + 2);
+ logevent("server:\tSB TSPEED SEND");
sprintf(logbuf, "client:\tSB TSPEED IS %s", cfg.termspeed);
- lognegot (logbuf);
+ logevent(logbuf);
} else
- lognegot ("server:\tSB TSPEED <something weird>");
+ logevent("server:\tSB TSPEED <something weird>");
break;
case TELOPT_TTYPE:
if (sb_len == 1 && sb_buf[0] == TELQUAL_SEND) {
- char logbuf[sizeof(cfg.termtype)+80];
- b[0] = IAC; b[1] = SB; b[2] = TELOPT_TTYPE;
+ char logbuf[sizeof(cfg.termtype) + 80];
+ 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]);
- b[n+4] = IAC; b[n+5] = SE;
- s_write (b, n+6);
- b[n+4] = 0;
- lognegot("server:\tSB TTYPE SEND");
- sprintf(logbuf, "client:\tSB TTYPE IS %s", b+4);
- lognegot(logbuf);
+ b[n + 4] = (cfg.termtype[n] >= 'a'
+ && cfg.termtype[n] <=
+ 'z' ? cfg.termtype[n] + 'A' -
+ 'a' : cfg.termtype[n]);
+ b[n + 4] = IAC;
+ b[n + 5] = SE;
+ telnet_bufsize = sk_write(s, b, n + 6);
+ b[n + 4] = 0;
+ logevent("server:\tSB TTYPE SEND");
+ sprintf(logbuf, "client:\tSB TTYPE IS %s", b + 4);
+ logevent(logbuf);
} else
- lognegot("server:\tSB TTYPE <something weird>\r\n");
+ logevent("server:\tSB TTYPE <something weird>\r\n");
break;
case TELOPT_OLD_ENVIRON:
- case TELOPT_NEW_ENVIRON:
+ case TELOPT_NEW_ENVIRON:
p = sb_buf;
q = p + sb_len;
if (p < q && *p == TELQUAL_SEND) {
char logbuf[50];
p++;
- sprintf (logbuf, "server:\tSB %s SEND", telopt(sb_opt));
- lognegot (logbuf);
+ sprintf(logbuf, "server:\tSB %s SEND", telopt(sb_opt));
+ logevent(logbuf);
if (sb_opt == TELOPT_OLD_ENVIRON) {
if (cfg.rfc_environ) {
value = RFC_VALUE;
value = RFC_VALUE;
var = RFC_VAR;
}
- b[0] = IAC; b[1] = SB; b[2] = sb_opt;
+ b[0] = IAC;
+ b[1] = SB;
+ b[2] = sb_opt;
b[3] = TELQUAL_IS;
n = 4;
- e = cfg.environ;
+ e = cfg.environmt;
while (*e) {
b[n++] = var;
- while (*e && *e != '\t') b[n++] = *e++;
- if (*e == '\t') e++;
+ while (*e && *e != '\t')
+ b[n++] = *e++;
+ if (*e == '\t')
+ e++;
b[n++] = value;
- while (*e) b[n++] = *e++;
+ while (*e)
+ b[n++] = *e++;
e++;
}
if (*cfg.username) {
- b[n++] = var; b[n++] = 'U'; b[n++] = 'S';
- b[n++] = 'E'; b[n++] = 'R'; b[n++] = value;
+ b[n++] = var;
+ b[n++] = 'U';
+ b[n++] = 'S';
+ b[n++] = 'E';
+ b[n++] = 'R';
+ b[n++] = value;
e = cfg.username;
- while (*e) b[n++] = *e++;
+ while (*e)
+ b[n++] = *e++;
}
- b[n++] = IAC; b[n++] = SE;
- s_write (b, n);
+ b[n++] = IAC;
+ b[n++] = SE;
+ telnet_bufsize = sk_write(s, b, n);
sprintf(logbuf, "client:\tSB %s IS %s", telopt(sb_opt),
- n==6 ? "<nothing>" : "<stuff>");
- lognegot (logbuf);
+ n == 6 ? "<nothing>" : "<stuff>");
+ logevent(logbuf);
}
break;
}
SEENSB, SUBNEGOT, SUBNEG_IAC, SEENCR
} telnet_state = TOPLEVEL;
-static void do_telnet_read (char *buf, int len) {
- unsigned char b[10];
+static void do_telnet_read(char *buf, int len)
+{
while (len--) {
int c = (unsigned char) *buf++;
else if (c == IAC)
telnet_state = SEENIAC;
else {
- b[0] = c;
-#if 0
if (!in_synch)
+ c_write1(c);
+
+#if 1
+ /* I can't get the F***ing winsock to insert the urgent IAC
+ * into the right position! Even with SO_OOBINLINE it gives
+ * it to recv too soon. And of course the DM byte (that
+ * arrives in the same packet!) appears several K later!!
+ *
+ * Oh well, we do get the DM in the right place so I'll
+ * just stop hiding on the next 0xf2 and hope for the best.
+ */
+ else if (c == DM)
+ in_synch = 0;
#endif
- c_write (b, 1);
if (c == CR)
telnet_state = SEENCR;
else
}
break;
case SEENIAC:
- if (c == DO) telnet_state = SEENDO;
- else if (c == DONT) telnet_state = SEENDONT;
- else if (c == WILL) telnet_state = SEENWILL;
- else if (c == WONT) telnet_state = SEENWONT;
- else if (c == SB) telnet_state = SEENSB;
- else telnet_state = TOPLEVEL;/* ignore _everything_ else! */
+ if (c == DO)
+ telnet_state = SEENDO;
+ else if (c == DONT)
+ telnet_state = SEENDONT;
+ else if (c == WILL)
+ telnet_state = SEENWILL;
+ else if (c == WONT)
+ telnet_state = SEENWONT;
+ else if (c == SB)
+ telnet_state = SEENSB;
+ else if (c == DM) {
+ in_synch = 0;
+ telnet_state = TOPLEVEL;
+ } else {
+ /* ignore everything else; print it if it's IAC */
+ if (c == IAC) {
+ c_write1(c);
+ }
+ telnet_state = TOPLEVEL;
+ }
break;
case SEENWILL:
- proc_rec_opt (WILL, c);
+ proc_rec_opt(WILL, c);
telnet_state = TOPLEVEL;
break;
case SEENWONT:
- proc_rec_opt (WONT, c);
+ proc_rec_opt(WONT, c);
telnet_state = TOPLEVEL;
break;
case SEENDO:
- proc_rec_opt (DO, c);
+ proc_rec_opt(DO, c);
telnet_state = TOPLEVEL;
break;
case SEENDONT:
- proc_rec_opt (DONT, c);
+ proc_rec_opt(DONT, c);
telnet_state = TOPLEVEL;
break;
case SEENSB:
if (c == IAC)
telnet_state = SUBNEG_IAC;
else {
- subneg_addchar:
+ subneg_addchar:
if (sb_len >= sb_size) {
char *newbuf;
sb_size += SB_DELTA;
newbuf = (sb_buf ?
- realloc(sb_buf, sb_size) :
- malloc(sb_size));
+ srealloc(sb_buf, sb_size) :
+ smalloc(sb_size));
if (newbuf)
sb_buf = newbuf;
else
}
if (sb_len < sb_size)
sb_buf[sb_len++] = c;
- telnet_state = SUBNEGOT;/* in case we came here by goto */
+ telnet_state = SUBNEGOT; /* in case we came here by goto */
}
break;
case SUBNEG_IAC:
}
}
+static int telnet_closing(Plug plug, char *error_msg, int error_code,
+ int calling_back)
+{
+ if (s) {
+ sk_close(s);
+ s = NULL;
+ }
+ if (error_msg) {
+ /* A socket error has occurred. */
+ connection_fatal(error_msg);
+ } /* Otherwise, the remote side closed the connection normally. */
+ return 0;
+}
+
+static int telnet_receive(Plug plug, int urgent, char *data, int len)
+{
+ if (urgent)
+ in_synch = TRUE;
+ do_telnet_read(data, len);
+ return 1;
+}
+
/*
- * Called to set up the Telnet connection. Will arrange for
- * WM_NETEVENT messages to be passed to the specified window, whose
- * window procedure should then call telnet_msg().
+ * Called to set up the Telnet connection.
*
* Returns an error message, or NULL on success.
*
- * Also places the canonical host name into `realhost'.
+ * Also places the canonical host name into `realhost'. It must be
+ * freed by the caller.
*/
-static char *telnet_init (HWND hwnd, char *host, int port, char **realhost) {
- SOCKADDR_IN addr;
- struct hostent *h;
- unsigned long a;
+static char *telnet_init(char *host, int port, char **realhost)
+{
+ static struct plug_function_table fn_table = {
+ telnet_closing,
+ telnet_receive
+ }, *fn_table_ptr = &fn_table;
+
+ SockAddr addr;
+ char *err;
/*
* Try to find host.
*/
- if ( (a = inet_addr(host)) == (unsigned long) INADDR_NONE) {
- if ( (h = gethostbyname(host)) == NULL)
- switch (WSAGetLastError()) {
- case WSAENETDOWN: return "Network is down";
- case WSAHOST_NOT_FOUND: case WSANO_DATA:
- return "Host does not exist";
- case WSATRY_AGAIN: return "Host not found";
- default: return "gethostbyname: unknown error";
- }
- memcpy (&a, h->h_addr, sizeof(a));
- *realhost = h->h_name;
- } else
- *realhost = host;
- a = ntohl(a);
+ addr = sk_namelookup(host, realhost);
+ if ((err = sk_addr_error(addr)))
+ return err;
if (port < 0)
port = 23; /* default telnet port */
/*
* Open socket.
*/
- s = socket(AF_INET, SOCK_STREAM, 0);
- if (s == INVALID_SOCKET)
- switch (WSAGetLastError()) {
- case WSAENETDOWN: return "Network is down";
- case WSAEAFNOSUPPORT: return "TCP/IP support not present";
- default: return "socket(): unknown error";
- }
-
-#if 0
- {
- BOOL b = TRUE;
- setsockopt (s, SOL_SOCKET, SO_OOBINLINE, (void *)&b, sizeof(b));
- }
-#endif
-
- /*
- * Bind to local address.
- */
- addr.sin_family = AF_INET;
- addr.sin_addr.s_addr = htonl(INADDR_ANY);
- addr.sin_port = htons(0);
- if (bind (s, (struct sockaddr *)&addr, sizeof(addr)) == SOCKET_ERROR)
- switch (WSAGetLastError()) {
- case WSAENETDOWN: return "Network is down";
- default: return "bind(): unknown error";
- }
-
- /*
- * Connect to remote address.
- */
- addr.sin_addr.s_addr = htonl(a);
- addr.sin_port = htons((short)port);
- if (connect (s, (struct sockaddr *)&addr, sizeof(addr)) == SOCKET_ERROR)
- switch (WSAGetLastError()) {
- case WSAENETDOWN: return "Network is down";
- case WSAECONNREFUSED: return "Connection refused";
- case WSAENETUNREACH: return "Network is unreachable";
- case WSAEHOSTUNREACH: return "No route to host";
- default: return "connect(): unknown error";
- }
+ s = sk_new(addr, port, 0, 1, &fn_table_ptr);
+ if ((err = sk_socket_error(s)))
+ return err;
- if (WSAAsyncSelect (s, hwnd, WM_NETEVENT, FD_READ |
- FD_WRITE | FD_OOB | FD_CLOSE) == SOCKET_ERROR)
- switch (WSAGetLastError()) {
- case WSAENETDOWN: return "Network is down";
- default: return "WSAAsyncSelect(): unknown error";
- }
+ sk_addr_free(addr);
/*
* Initialise option states.
*/
- {
+ if (cfg.passive_telnet) {
+ struct Opt **o;
+
+ for (o = opts; *o; o++)
+ if ((*o)->state == REQUESTED)
+ (*o)->state = INACTIVE;
+ } else {
struct Opt **o;
for (o = opts; *o; o++)
if ((*o)->state == REQUESTED)
- send_opt ((*o)->send, (*o)->option);
+ send_opt((*o)->send, (*o)->option);
+ activated = TRUE;
}
-#if 0
/*
* Set up SYNCH state.
*/
in_synch = FALSE;
-#endif
return NULL;
}
/*
- * Process a WM_NETEVENT message. Will return 0 if the connection
- * has closed, or <0 for a socket error.
- */
-static int telnet_msg (WPARAM wParam, LPARAM lParam) {
- int ret;
- char buf[256];
-
- if (s == INVALID_SOCKET) /* how the hell did we get here?! */
- return -5000;
-
- if (WSAGETSELECTERROR(lParam) != 0)
- return -WSAGETSELECTERROR(lParam);
-
- switch (WSAGETSELECTEVENT(lParam)) {
- case FD_READ:
- ret = recv(s, buf, sizeof(buf), 0);
- if (ret < 0 && WSAGetLastError() == WSAEWOULDBLOCK)
- return 1;
- if (ret < 0) /* any _other_ error */
- return -10000-WSAGetLastError();
- if (ret == 0) {
- s = INVALID_SOCKET;
- return 0; /* can't happen, in theory */
- }
-#if 0
- if (in_synch) {
- BOOL i;
- if (ioctlsocket (s, SIOCATMARK, &i) < 0) {
- return -20000-WSAGetLastError();
- }
- if (i)
- in_synch = FALSE;
- }
-#endif
- do_telnet_read (buf, ret);
- return 1;
- case FD_OOB:
- do {
- ret = recv(s, buf, sizeof(buf), 0);
- } while (ret > 0);
- telnet_state = TOPLEVEL;
- do {
- ret = recv(s, buf, 1, MSG_OOB);
- if (ret > 0)
- do_telnet_read (buf, ret);
- } while (ret > 0);
- if (ret < 0 && WSAGetLastError() != WSAEWOULDBLOCK)
- return -30000-WSAGetLastError();
- return 1;
- case FD_WRITE:
- if (outbuf_head != outbuf_reap)
- try_write();
- return 1;
- case FD_CLOSE:
- s = INVALID_SOCKET;
- return 0;
- }
- return 1; /* shouldn't happen, but WTF */
-}
-
-/*
* Called to send data down the Telnet connection.
*/
-static void telnet_send (char *buf, int len) {
+static int telnet_send(char *buf, int len)
+{
char *p;
static unsigned char iac[2] = { IAC, IAC };
static unsigned char cr[2] = { CR, NUL };
+#if 0
+ static unsigned char nl[2] = { CR, LF };
+#endif
- if (s == INVALID_SOCKET)
- return;
+ if (s == NULL)
+ return 0;
p = buf;
- while (p < buf+len) {
+ while (p < buf + len) {
char *q = p;
- while (iswritable((unsigned char)*p) && p < buf+len) p++;
- s_write (q, p-q);
+ while (iswritable((unsigned char) *p) && p < buf + len)
+ p++;
+ telnet_bufsize = sk_write(s, q, p - q);
- while (p < buf+len && !iswritable((unsigned char)*p)) {
- s_write ((unsigned char)*p == IAC ? iac : cr, 2);
+ while (p < buf + len && !iswritable((unsigned char) *p)) {
+ telnet_bufsize =
+ sk_write(s, (unsigned char) *p == IAC ? iac : cr, 2);
p++;
}
}
+
+ return telnet_bufsize;
+}
+
+/*
+ * Called to query the current socket sendability status.
+ */
+static int telnet_sendbuffer(void)
+{
+ return telnet_bufsize;
}
/*
* Called to set the size of the window from Telnet's POV.
*/
-static void telnet_size(void) {
+static void telnet_size(void)
+{
unsigned char b[16];
char logbuf[50];
- if (s == INVALID_SOCKET || o_naws.state != ACTIVE)
+ if (s == NULL || o_naws.state != ACTIVE)
return;
- b[0] = IAC; b[1] = SB; b[2] = TELOPT_NAWS;
- b[3] = cols >> 8; b[4] = cols & 0xFF;
- b[5] = rows >> 8; b[6] = rows & 0xFF;
- b[7] = IAC; b[8] = SE;
- s_write (b, 9);
+ b[0] = IAC;
+ b[1] = SB;
+ b[2] = TELOPT_NAWS;
+ b[3] = cols >> 8;
+ b[4] = cols & 0xFF;
+ b[5] = rows >> 8;
+ b[6] = rows & 0xFF;
+ b[7] = IAC;
+ b[8] = SE;
+ telnet_bufsize = sk_write(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]);
- lognegot (logbuf);
+ ((unsigned char) b[3] << 8) + (unsigned char) b[4],
+ ((unsigned char) b[5] << 8) + (unsigned char) b[6]);
+ logevent(logbuf);
}
/*
* Send Telnet special codes.
*/
-static void telnet_special (Telnet_Special code) {
+static void telnet_special(Telnet_Special code)
+{
unsigned char b[2];
- if (s == INVALID_SOCKET)
+ if (s == NULL)
return;
b[0] = IAC;
switch (code) {
- case TS_AYT: b[1] = AYT; s_write (b, 2); break;
- case TS_BRK: b[1] = BREAK; s_write (b, 2); break;
- case TS_EC: b[1] = EC; s_write (b, 2); break;
- case TS_EL: b[1] = EL; s_write (b, 2); break;
- case TS_GA: b[1] = GA; s_write (b, 2); break;
- case TS_NOP: b[1] = NOP; s_write (b, 2); break;
- case TS_ABORT: b[1] = ABORT; s_write (b, 2); break;
- case TS_AO: b[1] = AO; s_write (b, 2); break;
- case TS_IP: b[1] = IP; s_write (b, 2); break;
- case TS_SUSP: b[1] = SUSP; s_write (b, 2); break;
- case TS_EOR: b[1] = EOR; s_write (b, 2); break;
- case TS_EOF: b[1] = xEOF; s_write (b, 2); break;
+ case TS_AYT:
+ b[1] = AYT;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_BRK:
+ b[1] = BREAK;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_EC:
+ b[1] = EC;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_EL:
+ b[1] = EL;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_GA:
+ b[1] = GA;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_NOP:
+ b[1] = NOP;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_ABORT:
+ b[1] = ABORT;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_AO:
+ b[1] = AO;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_IP:
+ b[1] = IP;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_SUSP:
+ b[1] = SUSP;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_EOR:
+ b[1] = EOR;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_EOF:
+ b[1] = xEOF;
+ telnet_bufsize = sk_write(s, b, 2);
+ break;
+ case TS_EOL:
+ telnet_bufsize = sk_write(s, "\r\n", 2);
+ break;
case TS_SYNCH:
- outbuf_head = outbuf_reap = 0;
- b[0] = DM;
- send (s, b, 1, MSG_OOB);
+ b[1] = DM;
+ telnet_bufsize = sk_write(s, b, 1);
+ telnet_bufsize = sk_write_oob(s, b + 1, 1);
+ break;
+ case TS_RECHO:
+ if (o_echo.state == INACTIVE || o_echo.state == REALLY_INACTIVE) {
+ o_echo.state = REQUESTED;
+ send_opt(o_echo.send, o_echo.option);
+ }
+ break;
+ case TS_LECHO:
+ if (o_echo.state == ACTIVE) {
+ o_echo.state = REQUESTED;
+ send_opt(o_echo.nsend, o_echo.option);
+ }
+ break;
+ case TS_PING:
+ if (o_they_sga.state == ACTIVE) {
+ b[1] = NOP;
+ telnet_bufsize = sk_write(s, b, 2);
+ }
break;
}
}
+static Socket telnet_socket(void)
+{
+ return s;
+}
+
+static int telnet_sendok(void)
+{
+ return 1;
+}
+
+static void telnet_unthrottle(int backlog)
+{
+ sk_set_frozen(s, backlog > TELNET_MAX_BACKLOG);
+}
+
+static int telnet_ldisc(int option)
+{
+ if (option == LD_ECHO)
+ return echoing;
+ if (option == LD_EDIT)
+ return editing;
+ return FALSE;
+}
+
Backend telnet_backend = {
telnet_init,
- telnet_msg,
telnet_send,
+ telnet_sendbuffer,
telnet_size,
- telnet_special
+ telnet_special,
+ telnet_socket,
+ telnet_sendok,
+ telnet_ldisc,
+ telnet_unthrottle,
+ 23
};
projects / u / mdw / putty / blobdiff