/*
* refclock_gtlin - groom next input line and extract timestamp
*
* This routine processes the timecode received from the clock and
* strips the parity bit and control characters. It returns the number
* of characters in the line followed by a NULL character ('\0'), which
* is not included in the count. In case of an empty line, the previous
* line is preserved.
*/
int
refclock_gtlin(
struct recvbuf *rbufp, /* receive buffer pointer */
char *lineptr, /* current line pointer */
int bmax, /* remaining characters in line */
l_fp *tsptr /* pointer to timestamp returned */
)
{
char s[BMAX];
char *dpt, *dpend, *dp;
dpt = s;
dpend = s + refclock_gtraw(rbufp, s, BMAX - 1, tsptr);
if (dpend - dpt > bmax - 1)
dpend = dpt + bmax - 1;
for (dp = lineptr; dpt < dpend; dpt++) {
char c;
c = *dpt & 0x7f;
if (c >= 0x20 && c < 0x7f)
*dp++ = c;
}
if (dp == lineptr)
return (0);
*dp = '\0';
return (dp - lineptr);
}
/*
* acts_receive - receive data from the serial interface
*/
static void
acts_receive(
struct recvbuf *rbufp
)
{
struct actsunit *up;
struct refclockproc *pp;
struct peer *peer;
char tbuf[sizeof(up->buf)];
char * tptr;
int octets;
/*
* Initialize pointers and read the timecode and timestamp. Note
* we are in raw mode and victim of whatever the terminal
* interface kicks up; so, we have to reassemble messages from
* arbitrary fragments. Capture the timecode at the beginning of
* the message and at the '*' and '#' on-time characters.
*/
peer = rbufp->recv_peer;
pp = peer->procptr;
up = pp->unitptr;
octets = sizeof(up->buf) - (up->bufptr - up->buf);
refclock_gtraw(rbufp, tbuf, octets, &pp->lastrec);
for (tptr = tbuf; *tptr != '\0'; tptr++) {
if (*tptr == LF) {
if (up->bufptr == up->buf) {
up->tstamp = pp->lastrec;
continue;
} else {
*up->bufptr = '\0';
up->bufptr = up->buf;
acts_message(peer, up->buf);
}
} else if (!iscntrl((unsigned char)*tptr)) {
*up->bufptr++ = *tptr;
if (*tptr == '*' || *tptr == '#') {
up->tstamp = pp->lastrec;
if (write(pp->io.fd, tptr, 1) < 0)
msyslog(LOG_ERR, "acts: write echo fails %m");
}
}
}
}
/*
* acts_receive - receive data from the serial interface
*/
static void
acts_receive (
struct recvbuf *rbufp
)
{
struct actsunit *up;
struct refclockproc *pp;
struct peer *peer;
char tbuf[BMAX];
char *tptr;
/*
* Initialize pointers and read the timecode and timestamp. Note
* we are in raw mode and victim of whatever the terminal
* interface kicks up; so, we have to reassemble messages from
* arbitrary fragments. Capture the timecode at the beginning of
* the message and at the '*' and '#' on-time characters.
*/
peer = (struct peer *)rbufp->recv_srcclock;
pp = peer->procptr;
up = (struct actsunit *)pp->unitptr;
pp->lencode = refclock_gtraw(rbufp, tbuf, BMAX - (up->bufptr -
pp->a_lastcode), &pp->lastrec);
for (tptr = tbuf; *tptr != '\0'; tptr++) {
if (*tptr == LF) {
if (up->bufptr == pp->a_lastcode) {
up->tstamp = pp->lastrec;
continue;
} else {
*up->bufptr = '\0';
acts_message(peer);
up->bufptr = pp->a_lastcode;
}
} else if (!iscntrl((unsigned char)*tptr)) {
*up->bufptr++ = *tptr;
if (*tptr == '*' || *tptr == '#') {
up->tstamp = pp->lastrec;
write(pp->io.fd, tptr, 1);
}
}
}
}