OpenBSD-4.6/lib/libsectok/scio.c
/* $Id: scio.c,v 1.12 2003/04/02 22:57:51 deraadt Exp $ */
/*
copyright 1997
the regents of the university of michigan
all rights reserved
permission is granted to use, copy, create derivative works
and redistribute this software and such derivative works
for any purpose, so long as the name of the university of
michigan is not used in any advertising or publicity
pertaining to the use or distribution of this software
without specific, written prior authorization. if the
above copyright notice or any other identification of the
university of michigan is included in any copy of any
portion of this software, then the disclaimer below must
also be included.
this software is provided as is, without representation
from the university of michigan as to its fitness for any
purpose, and without warranty by the university of
michigan of any kind, either express or implied, including
without limitation the implied warranties of
merchantability and fitness for a particular purpose. the
regents of the university of michigan shall not be liable
for any damages, including special, indirect, incidental, or
consequential damages, with respect to any claim arising
out of or in connection with the use of the software, even
if it has been or is hereafter advised of the possibility of
such damages.
*/
/*
* OS dependent part, Unix version
*
* Jim Rees, University of Michigan, October 1997
*/
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/types.h>
#include <sys/time.h>
#ifdef _AIX
#include <sys/select.h>
#endif /* _AIX */
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <termios.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include "sectok.h"
#include "sc7816.h"
#include "todos_scrw.h"
#ifndef howmany
#define howmany(x, y) (((x) + ((y) - 1)) / (y))
#endif
static int todos_scfdopen(int ttyn, int fd, int flags, int *ep);
static int todos_sccts(int ttyn);
#ifdef __linux
static char ttynametmpl[] = "/dev/ttyS%01d";
#elif _AIX
static char ttynametmpl[] = "/dev/tty%01d";
#elif __OpenBSD__
static char ttynametmpl[] = "/dev/cua%02d";
#elif __sun
/*static char ttynametmpl[] = "/dev/cua/%c";*/
static char ttynametmpl[] = "/dev/tty%c";
#else
static char ttynametmpl[] = "/dev/tty%02d";
#endif
static struct {
int fd, flags;
pid_t pid;
struct termios tio0, tio1;
} sc[4];
/* global variable */
#ifdef BYTECOUNT
int num_getc, num_putc;
#endif /* BYTECOUNT */
int
todos_scopen(int ttyn, int flags, int *ep)
{
char ttyname[32];
int fd, i, oflags;
pid_t pid;
#ifdef BYTECOUNT
num_getc = 0;
num_putc = 0;
#endif /* BYTECOUNT */
#ifdef __sun
snprintf(ttyname, sizeof ttyname, ttynametmpl, 'a' + ttyn);
#else
snprintf(ttyname, sizeof ttyname, ttynametmpl, ttyn);
#endif
#ifdef DEBUG
printf ("ttyname=%s\n", ttyname);
#endif /* DEBUG */
oflags = O_RDWR;
if (!(flags & SCODCD))
oflags |= O_NONBLOCK;
if ((fd = open(ttyname, oflags, 0)) < 0) {
if (ep)
*ep = SCENOTTY;
return -1;
}
if ((ttyn = todos_scfdopen(ttyn, fd, flags, ep)) < 0) {
close(fd);
return -1;
}
/* Figure out which reader we have */
if (ioctl(fd, TIOCMGET, &i) < 0) {
close(fd);
if (ep)
*ep = SCENOTTY;
return -1;
}
#ifndef __sun
/* Todos has RTS wired to RI, so set RTS and see if RI goes high */
i |= TIOCM_RTS;
ioctl(fd, TIOCMSET, &i);
ioctl(fd, TIOCMGET, &i);
#else
/* Sun serial port is broken, has no RI line */
i = TIOCM_RI;
#endif
if (i & TIOCM_RI) {
/* Todos reader */
scsleep(20);
sc[ttyn].flags |= (SCOXCTS | SCOXDTR);
}
if (flags & SCODSR) {
/* Wait for card present */
while (!todos_sccardpresent(ttyn)) {
errno = 0;
sleep(1);
if (errno == EINTR)
return -1;
}
}
if (flags & SCOHUP) {
/* spawn a process to wait for card removal */
pid = fork();
if (pid == 0) {
/* See if the card is still there */
while (todos_sccardpresent(ttyn))
sleep(1);
kill(getppid(), SIGHUP);
exit(0);
}
sc[ttyn].pid = pid;
}
return ttyn;
}
int
todos_scsetflags(int ttyn, int flags, int mask)
{
int oflags = sc[ttyn].flags;
sc[ttyn].flags &= ~mask;
sc[ttyn].flags |= (flags & mask);
if ((sc[ttyn].flags & SCOINVRT) != (oflags & SCOINVRT)) {
if (sc[ttyn].flags & SCOINVRT)
sc[ttyn].tio1.c_cflag |= PARODD;
else
sc[ttyn].tio1.c_cflag &= ~PARODD;
tcsetattr(sc[ttyn].fd, TCSADRAIN, &sc[ttyn].tio1);
}
return oflags;
}
/* NI: for Linux */
#if (B9600 != 9600)
struct speed_trans {
speed_t t_val;
int val;
char *s;
} speed_trans[] = {
{0, 0, "a"},
{B9600, 9600, "a"},
{B19200, 19200, "a"},
{B38400, 38400, "a"},
{B57600, 55928, "a"},
{B57600, 57600, "a"},
{B115200, 115200, "a"},
{-1, -1, NULL}};
#endif /* (B9600 != 9600) */
int
todos_scsetspeed(int ttyn, int speed)
{
#if (B9600 == 9600)
/* On OpenBSD, B9600 == 9600, and we can use the input argument
"speed" of this function as an argument to cfset[io]speed(). */
#else
/* On Linux, B9600 != 9600, and we have to translate the input argument
to speed_t. */
int i;
for (i = 0; speed_trans[i].s; i++)
if (speed_trans[i].val == speed) break;
if (speed_trans[i].s == NULL) {
fprintf (stderr, "scsetspeed() failed : speed %d not supported. ignore ...\n",
speed);
return 0;
}
speed = speed_trans[i].t_val;
#endif
cfsetispeed(&sc[ttyn].tio1, speed);
cfsetospeed(&sc[ttyn].tio1, speed);
return tcsetattr(sc[ttyn].fd, TCSADRAIN, &sc[ttyn].tio1);
}
static int
todos_scfdopen(int ttyn, int fd, int flags, int *ep)
{
struct termios t;
/* Get and save the tty state */
if (tcgetattr(fd, &t) < 0) {
if (ep)
*ep = SCENOTTY;
return -1;
}
sc[ttyn].fd = fd;
sc[ttyn].tio0 = t;
sc[ttyn].flags = flags;
/* Now put the tty in a happy ISO state */
/* 9600 bps */
cfsetispeed(&t, B9600);
cfsetospeed(&t, B9600);
/* raw 8/E/2 */
t.c_iflag &= ~(ISTRIP|INLCR|IGNCR|ICRNL|IXON);
t.c_iflag |= (IGNBRK|IGNPAR);
t.c_oflag &= ~OPOST;
t.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
#ifdef CHWFLOW
t.c_cflag &= ~CHWFLOW;
#endif
#ifdef CRTSCTS
t.c_cflag &= ~CRTSCTS;
#endif
#ifdef CRTSXOFF
t.c_cflag &= ~CRTSXOFF;
#endif
t.c_cflag |= CLOCAL;
/* 8/E/2 */
t.c_cflag &= ~(CSIZE | PARODD);
t.c_cflag |= (CS8 | PARENB | CSTOPB);
t.c_cc[VMIN] = 1;
t.c_cc[VTIME] = 0;
if (tcsetattr(fd, TCSANOW, &t) < 0) {
if (ep)
*ep = SCENOTTY;
sc[ttyn].fd = -1;
return -1;
}
sc[ttyn].tio1 = t;
/* The open may or may not have reset the card. Wait a while then flush
anything that came in on the port. */
scsleep(250);
tcflush(sc[ttyn].fd, TCIFLUSH);
return ttyn;
}
/* find out if there is a card in the reader */
int
todos_sccardpresent(int ttyn)
{
return (sc[ttyn].flags & SCOXCTS) ? !todos_sccts(ttyn) : todos_scdsr(ttyn);
}
/* query dsr on the port (usually indicates whether the card is present) */
int
todos_scdsr(int ttyn)
{
int fd = sc[ttyn].fd;
int i;
if (fd < 0 || ioctl(fd, TIOCMGET, &i) < 0)
return 0;
return ((i & TIOCM_DSR) ? 1 : 0);
}
static int
todos_sccts(int ttyn)
{
int fd = sc[ttyn].fd;
int i;
if (fd < 0 || ioctl(fd, TIOCMGET, &i) < 0)
return 0;
return ((i & TIOCM_CTS) ? 1 : 0);
}
/* raise or lower dtr */
int
todos_scdtr(int ttyn, int cmd)
{
int fd = sc[ttyn].fd;
int i;
if (!todos_sccardpresent(ttyn))
return -1;
if (ioctl(fd, TIOCMGET, &i) < 0)
return -1;
if (cmd)
i |= TIOCM_DTR;
else
i &= ~TIOCM_DTR;
i |= TIOCM_RTS;
return ioctl(fd, TIOCMSET, &i);
}
int
todos_scclose(int ttyn)
{
int fd = sc[ttyn].fd;
tcsetattr(fd, TCSANOW, &sc[ttyn].tio0);
close(fd);
sc[ttyn].fd = -1;
if (sc[ttyn].pid) {
kill(sc[ttyn].pid, SIGTERM);
sc[ttyn].pid = 0;
}
#ifdef BYTECOUNT
printf("#getc=%d, #putc=%d\n", num_getc - num_putc, num_putc);
#endif /* BYTECOUNT */
return 0;
}
/*
* get one byte from the card.
* wait at most ms msec. 0 for poll, -1 for infinite.
* return byte in *cp.
* return 0 or error.
*/
int
scgetc(int ttyn, unsigned char *cp, int ms)
{
int fd = sc[ttyn].fd;
fd_set *fdset;
struct timeval tv, *tvp;
#ifdef BYTECOUNT
num_getc++;
#endif /* BYTECOUNT */
fdset = (fd_set *)calloc(howmany(fd + 1, NFDBITS), sizeof(fd_mask));
if (fdset == NULL)
return SCENOMEM;
FD_SET(fd, fdset);
if (ms == -1)
tvp = NULL;
else {
tv.tv_sec = (ms + 1) / 1000;
tv.tv_usec = (ms % 1000) * 1000;
tvp = &tv;
}
if (select(fd + 1, fdset, NULL, NULL, tvp) != 1) {
free(fdset);
return SCTIMEO;
}
if (read(fd, cp, 1) != 1) {
free(fdset);
return SCTIMEO;
}
if (sc[ttyn].flags & SCOINVRT)
*cp = todos_scinvert[*cp];
free(fdset);
return SCEOK; /* 0 */
}
/* write one byte to the card */
int
scputc(int ttyn, int ic)
{
int fd = sc[ttyn].fd;
unsigned char c0, c1;
int code;
#ifdef BYTECOUNT
num_putc++;
#endif /* BYTECOUNT */
c0 = (sc[ttyn].flags & SCOINVRT) ? todos_scinvert[ic] : ic;
write(fd, &c0, 1);
/* gobble up the echo */
code = scgetc(ttyn, &c1, 200);
#ifdef GOBBLEDEBUG
if (sc[ttyn].flags & SCOINVRT)
c1 = todos_scinvert[c1];
if (code)
printf("failed to gobble\n");
else if (c0 != c1)
printf("misgobbled %x != %x\n", c0, c1);
else
printf("gobble gobble %x\n", c0);
#endif
return code;
}
int
scputblk(int ttyn, unsigned char *bp, int n)
{
int fd = sc[ttyn].fd;
unsigned char c;
write(fd, bp, n);
while (n--)
scgetc(ttyn, &c, 30);
return SCEOK;
}
void
scsleep(int ms)
{
struct timeval tv;
if (!ms)
return;
tv.tv_sec = (ms + 1) / 1000;
tv.tv_usec = (ms % 1000) * 1000;
select(0, NULL, NULL, NULL, &tv);
}