ttynvt version 0.15

The pollin flag must be cleared when the input buffer (pty slave) is
flushed. This ensures that the POLLIN event is not signaled to the application,
when there is not data to read.

.gitignore

@@ -20,7 +20,7 @@ Makefile
 
 # build
 *.o
-/ttynvt
+/src/ttynvt
 
 /ttynvt-*.tar.gz
 /ttynvt-*.tar.xz

.indent.pro

@@ -0,0 +1,6 @@
+-kr -i4 --no-tabs --line-length79 -di16
+--braces-after-if-line --brace-indent0 --dont-cuddle-else --cuddle-do-while
+--blank-lines-after-declarations --blank-lines-after-procedures
+--break-after-boolean-operator
+--no-space-after-casts
+--else-endif-column0

Makefile.am

@@ -1,20 +1,7 @@
-# Build ttynvt
-#
 
 MAINTAINERCLEANFILES = \
 	aclocal.m4 autom4te.cache compile config.h.in config.h.in~ configure \
 	depcomp install-sh missing \
-	Makefile.in
+	Makefile.in */Makefile.in
 
-CFLAGS_OPT  = -O3
-CFLAGS_WARN = -Wall -Wextra -Werror -Wno-unused-parameter
-
-bin_PROGRAMS = ttynvt
-
-ttynvt_SOURCES = \
-	ttynvt.c \
-	telnet_basic.c telnet_rfc2217.c telnet.h telnet_param.h
-
-ttynvt_CPPFLAGS = -I$(top_builddir) $(FUSE_CFLAGS) $(CFLAGS_OPT) $(CFLAGS_WARN)
-
-ttynvt_LDADD = $(FUSE_LIBS)
+SUBDIRS = src

configure.ac

@@ -1,4 +1,4 @@
-m4_define([pkg_version],  [0.10])
+m4_define([pkg_version],  [0.15])
 #m4_define([pkg_revision], [005])
 m4_define([pkg_version],  m4_ifdef([pkg_revision], [pkg_version.pkg_revision], [pkg_version]))
 
@@ -32,6 +32,7 @@ PKG_CHECK_MODULES(FUSE, fuse)
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_FILES([
 Makefile
+src/Makefile
 ])
 AC_OUTPUT
 

src/Makefile.am

@@ -0,0 +1,12 @@
+
+CFLAGS_WARN = -Wall -Wextra -Werror -Wno-unused-parameter
+
+bin_PROGRAMS = ttynvt
+
+ttynvt_SOURCES = \
+	ttynvt.c nvt_log.c nvt_log.h \
+	telnet_basic.c telnet_rfc2217.c telnet.h telnet_param.h
+
+ttynvt_CPPFLAGS = -I$(top_builddir) $(FUSE_CFLAGS) $(CFLAGS_WARN)
+
+ttynvt_LDADD = $(FUSE_LIBS)

src/nvt_log.c

@@ -0,0 +1,84 @@
+/*
+ * Logging functions
+ */
+#include <stdarg.h>
+#include <stdio.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/types.h>
+
+#include "nvt_log.h"
+
+#include <sys/syscall.h>
+#define gettid() (pid_t)syscall(__NR_gettid)
+
+char            log_level = 0;
+char            log_stdout = 0;
+
+static const char *_hms_txt(char *buf, unsigned int len)
+{
+    struct timeval  tv;
+    unsigned int    sod, hh, mm, ss;
+
+    gettimeofday(&tv, NULL);
+
+    sod = tv.tv_sec % (24 * 3600);
+    hh = sod / 3600;
+    mm = (sod - hh * 3600) / 60;
+    ss = sod - hh * 3600 - mm * 60;
+    snprintf(buf, len, "%02d:%02d:%02d.%06d",
+             hh, mm, ss, (unsigned int)tv.tv_usec);
+
+    return buf;
+}
+
+void nvt_log(int prio, const char *fmt, ...)
+{
+    va_list         arg;
+    char            buf[256], buft[64];
+    const char     *eol;
+    int             len;
+
+    va_start(arg, fmt);
+    len = vsnprintf(buf, sizeof(buf), fmt, arg);
+
+    if (log_stdout)
+    {
+        eol = (len > 0 && buf[len - 1] != '\n') ? "\n" : "";
+        printf("%s: [%d] %d: %s%s",
+               _hms_txt(buft, sizeof(buft)), gettid(), prio, buf, eol);
+    }
+    else
+    {
+        syslog(prio, "[%d] %s", gettid(), buf);
+    }
+
+    va_end(arg);
+}
+
+#define BPL 16                  /* Bytes per line */
+
+void nvt_log_buf(int prio, const char *txt, const void *ptr_, unsigned int len)
+{
+    unsigned int    ix, i, imax;
+    int             l, n;
+    char            buf[128];
+    const unsigned char *ptr = ptr_;
+
+    for (ix = 0; ix < len || (len == 0 && ix == 0); ix += BPL)
+    {
+        n = snprintf(buf, sizeof(buf), "%s: %04x:", txt, ix);
+        if (n <= 0)
+            return;             /* Just playing it safe */
+        imax = (len - ix < BPL) ? len - ix : BPL;
+        for (i = 0; i < imax; i++)
+        {
+            l = snprintf(buf + n, sizeof(buf) - n, " %02x", *ptr++);
+            if (l <= 0)
+                return;         /* Just playing it safe */
+            n += l;
+        }
+        nvt_log(prio, "%s\n", buf);
+    }
+}

src/nvt_log.h

@@ -0,0 +1,26 @@
+/*
+ * Logging functions
+ */
+#ifndef NVT_LOG_H
+#define NVT_LOG_H
+
+#include <syslog.h>
+
+#define _PRF_N_(no) __attribute__((__format__(__printf__, (no), (no) + 1)))
+#define _PRF2_ _PRF_N_(2)
+
+_PRF2_ void     nvt_log(int prio, const char *fmt, ...);
+void            nvt_log_buf(int prio, const char *txt,
+                            const void *ptr, unsigned int len);
+
+extern char     log_level;
+extern char     log_stdout;
+
+#define DBG(...) \
+    if (log_level > 0) nvt_log(LOG_DEBUG, __VA_ARGS__)
+#define DBG2(...) \
+    if (log_level > 1) nvt_log(LOG_DEBUG, __VA_ARGS__)
+#define DBG2_BUF(txt, ptr, len) \
+    if (log_level > 1) nvt_log_buf(LOG_DEBUG, txt, ptr, len)
+
+#endif /* NVT_LOG_H */

src/telnet.h

@@ -31,7 +31,7 @@ extern tn_ctx_t *telnet_ctx_init(void *cctx, srv_tx_f * ftx, srv_rx_f * frx,
 
 extern int      telnet_open(tn_ctx_t * tcc);
 
-extern int      telnet_rx(tn_ctx_t * tcc, char *buf, size_t * plen);
+extern int      telnet_rx(tn_ctx_t * tcc, char *buf, int *plen);
 extern int      telnet_tx(tn_ctx_t * tcc, const char *buf, int len);
 
 extern void     telnet_set_opt(tn_ctx_t * tcc, int opt, int prm,
@@ -42,10 +42,10 @@ extern void     telnet_rfc2217_handle_opt(tn_ctx_t * tcc, int opt,
 
 extern void     telnet_rfc2217_cfg(tn_ctx_t * tcc, int cmd,
                                    const void *val, int nd);
-extern void     telnet_rfc2217_ctl(tn_ctx_t * tcc, int cmd);
+extern void     telnet_rfc2217_ctl(tn_ctx_t * tcc, unsigned int val);
 
 /*RFC2217 modem state*/
-#define TNS_STATE_CD     0x80
+#define TNS_STATE_DCD    0x80
 #define TNS_STATE_RI     0x40
 #define TNS_STATE_DSR    0x20
 #define TNS_STATE_CTS    0x10
@@ -60,11 +60,12 @@ extern void     telnet_rfc2217_ctl(tn_ctx_t * tcc, int cmd);
 
 /*RFC2217 control commands*/
 #define TNS_CTL_NOFLOW      1
-#define TNS_CTL_XONOFF      2
+#define TNS_CTL_XONOFF_OUT  2
 #define TNS_CTL_CTSRTS      3
 #define TNS_CTL_DTR_ON      8
 #define TNS_CTL_DTR_OFF     9
 #define TNS_CTL_RTS_ON     11
 #define TNS_CTL_RTS_OFF    12
+#define TNS_CTL_XONOFF_IN  15
 
 #endif /*TELNET_H */

src/telnet_basic.c

@@ -121,18 +121,18 @@ static void _telnet_handle_opt(tn_ctx_t * tcc, int opt,
     }
 }
 
-int telnet_rx(tn_ctx_t * tcc, char *buf, size_t * plen)
+int telnet_rx(tn_ctx_t * tcc, char *buf, int *plen)
 {
     char           *s, *p;
     unsigned char  *pu;
-    size_t          len, rem;
+    int             len, rem;
     int             np, nd;
     int             b1, b2;
 
     len = *plen;
     tcc->bytes_rx += len;
 
-    if (len < (size_t) tcc->off_rx)
+    if (len < (int)tcc->off_rx)
         tcc->off_rx = 0;
 
     for (s = buf + tcc->off_rx, rem = len - tcc->off_rx; rem > 0; s = p)

src/telnet_param.h

@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2018 Lars Thrane A/S
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * Telnet parameters
+ */
+#ifndef TELNET_PARAM_H
+#define TELNET_PARAM_H
+
+
+/*
+ * Telnet commands
+ */
+
+#define TNC_F0_SE   (0xf0)      /* End of subnegotiation parameters */
+#define TNC_F1_NOP  (0xf1)      /* No operation                     */
+#define TNC_F2_MARK (0xf2)      /* The data stream portion of a Synch.
+                                   This should always be accompanied
+                                   by a TCP Urgent notification. */
+#define TNC_F3_BRK  (0xf3)      /* NVT character BRK.               */
+#define TNC_F4_IP   (0xf4)      /* The function IP (interrupt process) */
+#define TNC_F5_AO   (0xf5)      /* The function AO (abort output)   */
+#define TNC_F6_AYT  (0xf6)      /* The function AYT (are you there) */
+#define TNC_F7_EC   (0xf7)      /* The function EC (erase charceter) */
+#define TNC_F8_EL   (0xf8)      /* The function EL (erase line)     */
+#define TNC_F9_GA   (0xf9)      /* The GA signal (go ahead)         */
+#define TNC_FA_SB   (0xfa)      /* Subnegotiation begin             */
+#define TNC_FB_WILL (0xfb)      /* Indicates the desire to begin
+                                   performing, or confirmation that
+                                   you are now performing, the
+                                   indicated option. */
+#define TNC_FC_WONT (0xfc)      /* Indicates the refusal to perform,
+                                   or continue performing, the
+                                   indicated option. */
+#define TNC_FD_DO   (0xfd)      /* Indicates the request that the
+                                   other party perform, or
+                                   confirmation that you are expecting
+                                   the other party to perform, the
+                                   indicated option. */
+#define TNC_FE_DONT (0xfe)      /* Indicates the demand that the
+                                   other party stop performing,
+                                   or confirmation that you are no
+                                   longer expecting the other party
+                                   to perform, the indicated option. */
+#define TNC_FF_IAC  (0xff)      /* Interpret as Command / data byte */
+
+
+/*
+ * Telnet options
+ */
+
+/*
+ * https://www.iana.org/assignments/telnet-options/telnet-options.xhtml
+ *
+ *   0  00  Binary Transmission                 [RFC856]
+ *   1  01  Echo                                [RFC857]
+ *   2  02  Reconnection                        [DDN Protocol Handbook, ... ]
+ *   3  03  Suppress Go Ahead                   [RFC858]
+ *   4  04  Approx Message Size Negotiation     ["The Ethernet, ..." ]
+ *   5  05  Status                              [RFC859]
+ *   6  06  Timing Mark                         [RFC860]
+ *   7  07  Remote Controlled Trans and Echo    [RFC726]
+ *   8  08  Output Line Width                   [DDN Protocol Handbook, ... ]
+ *   9  09  Output Page Size                    [DDN Protocol Handbook, ... ]
+ *  10  0a  Output Carriage-Return Disposition  [RFC652]
+ *  11  0b  Output Horizontal Tab Stops         [RFC653]
+ *  12  0c  Output Horizontal Tab Disposition   [RFC654]
+ *  13  0d  Output Formfeed Disposition         [RFC655]
+ *  14  0e  Output Vertical Tabstops            [RFC656]
+ *  15  0f  Output Vertical Tab Disposition     [RFC657]
+ *  16  10  Output Linefeed Disposition         [RFC658]
+ *  17  11  Extended ASCII                      [RFC698]
+ *  18  12  Logout                              [RFC727]
+ *  19  13  Byte Macro                          [RFC735]
+ *  20  14  Data Entry Terminal                 [RFC1043][RFC732]
+ *  21  15  SUPDUP                              [RFC736][RFC734]
+ *  22  16  SUPDUP Output                       [RFC749]
+ *  23  17  Send Location                       [RFC779]
+ *  24  18  Terminal Type                       [RFC1091]
+ *  25  19  End of Record                       [RFC885]
+ *  26  1a  TACACS User Identification          [RFC927]
+ *  27  1b  Output Marking                      [RFC933]
+ *  28  1c  Terminal Location Number            [RFC946]
+ *  29  1d  Telnet 3270 Regime                  [RFC1041]
+ *  30  1e  X.3 PAD                             [RFC1053]
+ *  31  1f  Negotiate About Window Size         [RFC1073]
+ *  32  20  Terminal Speed                      [RFC1079]
+ *  33  21  Remote Flow Control                 [RFC1372]
+ *  34  22  Linemode                            [RFC1184]
+ *  35  23  X Display Location                  [RFC1096]
+ *  36  24  Environment Option                  [RFC1408]
+ *  37  25  Authentication Option               [RFC2941]
+ *  38  26  Encryption Option                   [RFC2946]
+ *  39  27  New Environment Option              [RFC1572]
+ *  40  28  TN3270E                             [RFC2355]
+ *  41  29  XAUTH                               [Rob_Earhart]
+ *  42  2a  CHARSET                             [RFC2066]
+ *  43  2b  Telnet Remote Serial Port (RSP)     [Robert_Barnes]
+ *  44  2c  Com Port Control Option             [RFC2217]
+ *  45  2d  Telnet Suppress Local Echo          [Wirt_Atmar]
+ *  46  2e  Telnet Start TLS                    [Michael_Boe]
+ *  47  2f  KERMIT                              [RFC2840]
+ *  48  30  SEND-URL                            [David_Croft]
+ *  49  31  FORWARD_X                           [Jeffrey_Altman]
+ *  50-137  32-89  Unassigned                   [IANA]
+ * 138  8a  TELOPT PRAGMA LOGON                 [Steve_McGregory]
+ * 139  8b  TELOPT SSPI LOGON                   [Steve_McGregory]
+ * 140  8c  TELOPT PRAGMA HEARTBEAT             [Steve_McGregory]
+ * 141-254  8d-fe  Unassigned
+ * 255  ff  Extended-Options-List               [RFC861]
+*/
+
+#define TNO_BINARY   0          /* 00  Binary Transmission          */
+#define TNO_ECHO     1          /* 01  Echo                         */
+#define TNO_SUPP_GA  3          /* 03  Suppress Go Ahead            */
+#define TNO_LOGOUT  18          /* 12  Logout                       */
+#define TNO_TTYP    24          /* 18  Terminal Type                */
+#define TNO_NAWS    31          /* 1f  Negotiate About Window Size  */
+#define TNO_NEO     39          /* 27  New Environment Option       */
+#define TNO_CPCO    44          /* 2c  RFC 2217                     */
+#define TNO_KERMIT  47          /* 2f  Kermit                       */
+
+#endif /* TELNET_PARAM_H */

src/telnet_rfc2217.c

@@ -43,10 +43,12 @@ void telnet_rfc2217_cfg(tn_ctx_t * tcc, int cmd, const void *val, int nd)
     telnet_set_opt(tcc, TNO_CPCO, cmd, val, nd);
 }
 
-void telnet_rfc2217_ctl(tn_ctx_t * tcc, int cmd)
+void telnet_rfc2217_ctl(tn_ctx_t * tcc, unsigned int val)
 {
+    unsigned char   byte = val;
+
     if (!tcc->mode_rfc2217)
         return;
 
-    telnet_set_opt(tcc, TNO_CPCO, TNS_SET_CONTROL, &cmd, 1);
+    telnet_set_opt(tcc, TNO_CPCO, TNS_SET_CONTROL, &byte, 1);
 }

telnet_param.h

@@ -1,123 +0,0 @@
-/*
- * Copyright (c) 2018 Lars Thrane A/S
- * SPDX-License-Identifier: GPL-2.0
- *
- * Telnet parameters
- */
-#ifndef TELNET_PARAM_H
-#define TELNET_PARAM_H
-
-
-/*
- * Telnet commands
- */
-
-#define TNC_F0_SE   (0xf0)      /* End of subnegotiation parameters */
-#define TNC_F1_NOP  (0xf1)      /* No operation                     */
-#define TNC_F2_MARK (0xf2)      /* The data stream portion of a Synch.
-                                   This should always be accompanied
-                                   by a TCP Urgent notification. */
-#define TNC_F3_BRK  (0xf3)      /* NVT character BRK.               */
-#define TNC_F4_IP   (0xf4)      /* The function IP (interrupt process) */
-#define TNC_F5_AO   (0xf5)      /* The function AO (abort output)   */
-#define TNC_F6_AYT  (0xf6)      /* The function AYT (are you there) */
-#define TNC_F7_EC   (0xf7)      /* The function EC (erase charceter) */
-#define TNC_F8_EL   (0xf8)      /* The function EL (erase line)     */
-#define TNC_F9_GA   (0xf9)      /* The GA signal (go ahead)         */
-#define TNC_FA_SB   (0xfa)      /* Subnegotiation begin             */
-#define TNC_FB_WILL (0xfb)      /* Indicates the desire to begin
-                                   performing, or confirmation that
-                                   you are now performing, the
-                                   indicated option. */
-#define TNC_FC_WONT (0xfc)      /* Indicates the refusal to perform,
-                                   or continue performing, the
-                                   indicated option. */
-#define TNC_FD_DO   (0xfd)      /* Indicates the request that the
-                                   other party perform, or
-                                   confirmation that you are expecting
-                                   the other party to perform, the
-                                   indicated option. */
-#define TNC_FE_DONT (0xfe)      /* Indicates the demand that the
-                                   other party stop performing,
-                                   or confirmation that you are no
-                                   longer expecting the other party
-                                   to perform, the indicated option. */
-#define TNC_FF_IAC  (0xff)      /* Interpret as Command / data byte */
-
-
-/*
- * Telnet options
- */
-
-/*
- * https://www.iana.org/assignments/telnet-options/telnet-options.xhtml
- *
- * 0 	Binary Transmission					[RFC856]
- * 1 	Echo								[RFC857]
- * 2 	Reconnection						[DDN Protocol Handbook, ... ]
- * 3 	Suppress Go Ahead					[RFC858]
- * 4 	Approx Message Size Negotiation		["The Ethernet, ... ]
- * 5 	Status								[RFC859]
- * 6 	Timing Mark							[RFC860]
- * 7 	Remote Controlled Trans and Echo	[RFC726]
- * 8 	Output Line Width					[DDN Protocol Handbook, ... ]
- * 9 	Output Page Size					[DDN Protocol Handbook, ... ]
- * 10 	Output Carriage-Return Disposition	[RFC652]
- * 11 	Output Horizontal Tab Stops			[RFC653]
- * 12 	Output Horizontal Tab Disposition	[RFC654]
- * 13 	Output Formfeed Disposition			[RFC655]
- * 14 	Output Vertical Tabstops			[RFC656]
- * 15 	Output Vertical Tab Disposition		[RFC657]
- * 16 	Output Linefeed Disposition			[RFC658]
- * 17 	Extended ASCII						[RFC698]
- * 18 	Logout								[RFC727]
- * 19 	Byte Macro							[RFC735]
- * 20 	Data Entry Terminal					[RFC1043][RFC732]
- * 21 	SUPDUP								[RFC736][RFC734]
- * 22 	SUPDUP Output						[RFC749]
- * 23 	Send Location						[RFC779]
- * 24 	Terminal Type						[RFC1091]
- * 25 	End of Record						[RFC885]
- * 26 	TACACS User Identification			[RFC927]
- * 27 	Output Marking						[RFC933]
- * 28 	Terminal Location Number			[RFC946]
- * 29 	Telnet 3270 Regime					[RFC1041]
- * 30 	X.3 PAD								[RFC1053]
- * 31 	Negotiate About Window Size			[RFC1073]
- * 32 	Terminal Speed						[RFC1079]
- * 33 	Remote Flow Control					[RFC1372]
- * 34 	Linemode							[RFC1184]
- * 35 	X Display Location					[RFC1096]
- * 36 	Environment Option					[RFC1408]
- * 37 	Authentication Option				[RFC2941]
- * 38 	Encryption Option					[RFC2946]
- * 39 	New Environment Option				[RFC1572]
- * 40 	TN3270E								[RFC2355]
- * 41 	XAUTH								[Rob_Earhart]
- * 42 	CHARSET								[RFC2066]
- * 43 	Telnet Remote Serial Port (RSP)		[Robert_Barnes]
- * 44 	Com Port Control Option				[RFC2217]
- * 45 	Telnet Suppress Local Echo			[Wirt_Atmar]
- * 46 	Telnet Start TLS					[Michael_Boe]
- * 47 	KERMIT								[RFC2840]
- * 48 	SEND-URL							[David_Croft]
- * 49 	FORWARD_X							[Jeffrey_Altman]
- * 50-137 	Unassigned						[IANA]
- * 138 	TELOPT PRAGMA LOGON					[Steve_McGregory]
- * 139 	TELOPT SSPI LOGON					[Steve_McGregory]
- * 140 	TELOPT PRAGMA HEARTBEAT				[Steve_McGregory]
- * 141-254 	Unassigned
- * 255 	Extended-Options-List				[RFC861]
-*/
-
-#define TNO_BINARY   0          /* Binary Transmission          */
-#define TNO_ECHO     1          /* Echo                         */
-#define TNO_SUPP_GA  3          /* Suppress Go Ahead            */
-#define TNO_LOGOUT  18          /* Logout                       */
-#define TNO_TTYP    24          /* Terminal Type                */
-#define TNO_NAWS    31          /* Negotiate About Window Size  */
-#define TNO_NEO     39          /* New Environment Option       */
-#define TNO_CPCO    44          /* RFC 2217                     */
-#define TNO_KERMIT  47          /* Kermit                       */
-
-#endif /* TELNET_PARAM_H */