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Add baud rate support to telnet(1)

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This implements part of RFC-2217

It's based off a patch originally written by Sujal Patel at Isilon, and
contributions from other Isilon employees.

PR: 173728
Phabric: D995
Reviewed by: markj, markm
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division


git-svn-id: http://svn0.us-east.freebsd.org/base/head/contrib/telnet@274364 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
This commit is contained in:
ngie 2014-11-11 04:06:05 +00:00
parent 2d43ae29e1
commit 052bf438de
10 changed files with 199 additions and 134 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arpa/telnet.h
View File

@ -127,6 +127,7 @@ extern char *telcmds[];
#define TELOPT_KERMIT 47 /* RFC2840 - Kermit */
#define TELOPT_EXOPL 255 /* extended-options-list */
#define COMPORT_SET_BAUDRATE 1 /* RFC2217 - Com Port Set Baud Rate */
#define NTELOPTS (1+TELOPT_KERMIT)
#ifdef TELOPTS

121
telnet/baud.h Normal file
View File

@ -0,0 +1,121 @@
/*
* Copyright (c) 2014 EMC Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
*/
#if B4800 != 4800
#define DECODE_BAUD
#endif
#ifdef DECODE_BAUD
#ifndef B7200
#define B7200 B4800
#endif
#ifndef B14400
#define B14400 B9600
#endif
#ifndef B19200
#define B19200 B14400
#endif
#ifndef B28800
#define B28800 B19200
#endif
#ifndef B38400
#define B38400 B28800
#endif
#ifndef B57600
#define B57600 B38400
#endif
#ifndef B76800
#define B76800 B57600
#endif
#ifndef B115200
#define B115200 B76800
#endif
#ifndef B115200
#define B115200 B76800
#endif
#endif
#ifndef B230400
#define B230400 B115200
#endif
/*
* A table of available terminal speeds
*/
struct termspeeds termspeeds[] = {
{ 0, B0 },
{ 50, B50 },
{ 75, B75 },
{ 110, B110 },
{ 134, B134 },
{ 150, B150 },
{ 200, B200 },
{ 300, B300 },
{ 600, B600 },
{ 1200, B1200 },
{ 1800, B1800 },
{ 2400, B2400 },
{ 4800, B4800 },
#ifdef B7200
{ 7200, B7200 },
#endif
{ 9600, B9600 },
#ifdef B14400
{ 14400, B14400 },
#endif
#ifdef B19200
{ 19200, B19200 },
#endif
#ifdef B28800
{ 28800, B28800 },
#endif
#ifdef B38400
{ 38400, B38400 },
#endif
#ifdef B57600
{ 57600, B57600 },
#endif
#ifdef B115200
{ 115200, B115200 },
#endif
#ifdef B230400
{ 230400, B230400 },
#endif
{ -1, 0 }
};

1
telnet/commands.c
View File

@ -896,6 +896,7 @@ static struct setlist Setlist[] = {
{ "forw1", "alternate end of line character", NULL, termForw1Charp },
{ "forw2", "alternate end of line character", NULL, termForw2Charp },
{ "ayt", "alternate AYT character", NULL, termAytCharp },
{ "baudrate", "set remote baud rate", DoBaudRate, ComPortBaudRate },
{ NULL, NULL, NULL, NULL }
};

14
telnet/externs.h
View File

@ -231,6 +231,10 @@ extern unsigned char
NetTraceFile[]; /* Name of file where debugging output goes */
extern void
SetNetTrace(char *); /* Function to change where debugging goes */
extern unsigned char
ComPortBaudRate[]; /* Baud rate of the remote end */
extern void
DoBaudRate(char *); /* Function to set the baud rate of the remote end */
extern jmp_buf
toplevel; /* For error conditions. */
@ -475,6 +479,16 @@ extern cc_t termAytChar;
# endif
#endif
typedef struct {
int
system, /* what the current time is */
echotoggle, /* last time user entered echo character */
modenegotiated, /* last time operating mode negotiated */
didnetreceive, /* last time we read data from network */
gotDM; /* when did we last see a data mark */
} Clocks;
extern Clocks clocks;
/* Ring buffer structures which are shared */

11
telnet/main.c
View File

@ -91,10 +91,10 @@ usage(void)
fprintf(stderr, "usage: %s %s%s%s%s\n",
prompt,
#ifdef AUTHENTICATION
"[-4] [-6] [-8] [-E] [-K] [-L] [-N] [-S tos] [-X atype] [-c] [-d]",
"\n\t[-e char] [-k realm] [-l user] [-f/-F] [-n tracefile] ",
"[-4] [-6] [-8] [-B baudrate] [-E] [-K] [-L] [-N] [-S tos] [-X atype]",
"\n\t[-c] [-d] [-e char] [-k realm] [-l user] [-f/-F] [-n tracefile] ",
#else
"[-4] [-6] [-8] [-E] [-L] [-N] [-S tos] [-c] [-d]",
"[-4] [-6] [-8] [-B baudrate] [-E] [-L] [-N] [-S tos] [-c] [-d]",
"\n\t[-e char] [-l user] [-n tracefile] ",
#endif
"[-r] [-s src_addr] [-u] ",
@ -154,7 +154,7 @@ main(int argc, char *argv[])
#define IPSECOPT
#endif
while ((ch = getopt(argc, argv,
"468EKLNS:X:acde:fFk:l:n:rs:uxy" IPSECOPT)) != -1)
"468B:EKLNS:X:acde:fFk:l:n:rs:uxy" IPSECOPT)) != -1)
#undef IPSECOPT
{
switch(ch) {
@ -169,6 +169,9 @@ main(int argc, char *argv[])
case '8':
eight = 3; /* binary output and input */
break;
case 'B':
DoBaudRate(optarg);
break;
case 'E':
rlogin = escape = _POSIX_VDISABLE;
break;

66
telnet/sys_bsd.c
View File

@ -60,6 +60,7 @@ __FBSDID("$FreeBSD$");
#include "defines.h"
#include "externs.h"
#include "types.h"
#include "baud.h"
int
tout, /* Output file descriptor */
@ -682,71 +683,6 @@ TerminalNewMode(int f)
}
/*
* Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
*/
#if B4800 != 4800
#define DECODE_BAUD
#endif
#ifdef DECODE_BAUD
#ifndef B7200
#define B7200 B4800
#endif
#ifndef B14400
#define B14400 B9600
#endif
#ifndef B19200
# define B19200 B14400
#endif
#ifndef B28800
#define B28800 B19200
#endif
#ifndef B38400
# define B38400 B28800
#endif
#ifndef B57600
#define B57600 B38400
#endif
#ifndef B76800
#define B76800 B57600
#endif
#ifndef B115200
#define B115200 B76800
#endif
#ifndef B230400
#define B230400 B115200
#endif
/*
* This code assumes that the values B0, B50, B75...
* are in ascending order. They do not have to be
* contiguous.
*/
struct termspeeds {
long speed;
long value;
} termspeeds[] = {
{ 0, B0 }, { 50, B50 }, { 75, B75 },
{ 110, B110 }, { 134, B134 }, { 150, B150 },
{ 200, B200 }, { 300, B300 }, { 600, B600 },
{ 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 },
{ 4800, B4800 }, { 7200, B7200 }, { 9600, B9600 },
{ 14400, B14400 }, { 19200, B19200 }, { 28800, B28800 },
{ 38400, B38400 }, { 57600, B57600 }, { 115200, B115200 },
{ 230400, B230400 }, { -1, B230400 }
};
#endif /* DECODE_BAUD */
void
TerminalSpeeds(long *ispeed, long *ospeed)
{

4
telnet/telnet.1
View File

@ -43,6 +43,7 @@ protocol
.Sh SYNOPSIS
.Nm
.Op Fl 468EFKLNacdfruxy
.Op Fl B Ar baudrate
.Op Fl S Ar tos
.Op Fl X Ar authtype
.Op Fl e Ar escapechar
@ -89,6 +90,9 @@ This causes an attempt to
negotiate the
.Dv TELNET BINARY
option on both input and output.
.It Fl B Ar baudrate
Sets the baud rate to
.Ar baudrate .
.It Fl E
Stops any character from being recognized as an escape character.
.It Fl F

49
telnet/telnet.c
View File

@ -52,6 +52,7 @@ __FBSDID("$FreeBSD$");
#include <stdlib.h>
#include <term.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <arpa/telnet.h>
#include "ring.h"
@ -68,7 +69,7 @@ __FBSDID("$FreeBSD$");
#include <libtelnet/encrypt.h>
#endif
#include <libtelnet/misc.h>
#define strip(x) ((my_want_state_is_wont(TELOPT_BINARY)) ? ((x)&0x7f) : (x))
static unsigned char subbuffer[SUBBUFSIZE],
@ -162,7 +163,7 @@ static int is_unique(char *, char **, char **);
*/
Clocks clocks;
/*
* Initialize telnet environment.
*/
@ -196,7 +197,7 @@ init_telnet(void)
flushline = 1;
telrcv_state = TS_DATA;
}
/*
* These routines are in charge of sending option negotiations
@ -206,6 +207,42 @@ init_telnet(void)
* is in disagreement as to what the current state should be.
*/
unsigned char ComPortBaudRate[256];
void
DoBaudRate(char *arg)
{
char *temp, temp2[10];
int i;
uint32_t baudrate;
errno = 0;
baudrate = (uint32_t)strtol(arg, &temp, 10);
if (temp[0] != '\0' || (baudrate == 0 && errno != 0))
ExitString("Invalid baud rate provided.\n", 1);
for (i = 1; termspeeds[i].speed != -1; i++)
if (baudrate == termspeeds[i].speed)
break;
if (termspeeds[i].speed == -1)
ExitString("Invalid baud rate provided.\n", 1);
strlcpy(ComPortBaudRate, arg, sizeof(ComPortBaudRate));
if (NETROOM() < sizeof(temp2)) {
ExitString("No room in buffer for baud rate.\n", 1);
/* NOTREACHED */
}
snprintf(temp2, sizeof(temp2), "%c%c%c%c....%c%c", IAC, SB, TELOPT_COMPORT,
COMPORT_SET_BAUDRATE, IAC, SE);
baudrate = htonl(baudrate);
memcpy(&temp2[4], &baudrate, sizeof(baudrate));
ring_supply_data(&netoring, temp2, sizeof(temp2));
printsub('>', &temp[2], sizeof(temp2) - 2);
}
void
send_do(int c, int init)
{
@ -1084,7 +1121,7 @@ lm_mode(unsigned char *cmd, int len, int init)
setconnmode(0); /* set changed mode */
}
/*
* slc()
@ -1628,7 +1665,7 @@ env_opt_end(int emptyok)
}
}
int
telrcv(void)
@ -2013,7 +2050,7 @@ telsnd(void)
ring_consumed(&ttyiring, count);
return returnValue||count; /* Non-zero if we did anything */
}
/*
* Scheduler()
*

14
telnet/types.h
View File

@ -40,13 +40,9 @@ typedef struct {
extern Modelist modelist[];
typedef struct {
int
system, /* what the current time is */
echotoggle, /* last time user entered echo character */
modenegotiated, /* last time operating mode negotiated */
didnetreceive, /* last time we read data from network */
gotDM; /* when did we last see a data mark */
} Clocks;
struct termspeeds {
int speed;
int value;
};
extern Clocks clocks;
extern struct termspeeds termspeeds[];

52
telnetd/sys_term.c
View File

@ -46,6 +46,8 @@ __FBSDID("$FreeBSD$");
#include "telnetd.h"
#include "pathnames.h"
#include "types.h"
#include "baud.h"
#ifdef AUTHENTICATION
#include <libtelnet/auth.h>
@ -743,56 +745,6 @@ tty_iscrnl(void)
#endif
}
/*
* Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
*/
#if B4800 != 4800
#define DECODE_BAUD
#endif
#ifdef DECODE_BAUD
/*
* A table of available terminal speeds
*/
struct termspeeds {
int speed;
int value;
} termspeeds[] = {
{ 0, B0 }, { 50, B50 }, { 75, B75 },
{ 110, B110 }, { 134, B134 }, { 150, B150 },
{ 200, B200 }, { 300, B300 }, { 600, B600 },
{ 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 },
{ 4800, B4800 },
#ifdef B7200
{ 7200, B7200 },
#endif
{ 9600, B9600 },
#ifdef B14400
{ 14400, B14400 },
#endif
#ifdef B19200
{ 19200, B19200 },
#endif
#ifdef B28800
{ 28800, B28800 },
#endif
#ifdef B38400
{ 38400, B38400 },
#endif
#ifdef B57600
{ 57600, B57600 },
#endif
#ifdef B115200
{ 115200, B115200 },
#endif
#ifdef B230400
{ 230400, B230400 },
#endif
{ -1, 0 }
};
#endif /* DECODE_BAUD */
void
tty_tspeed(int val)
{