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Fixed slattach to do flags ioctl via network device rather than tty.

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Submitted by:	Rich Murphey, and fixed up by me.
This commit is contained in:
David Greenman 1994-09-14 05:40:56 +00:00
parent 5e9ae478ac
commit a68dd6cb87
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=2755
1 changed files with 35 additions and 3 deletions
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38
sbin/slattach/slattach.c
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@ -284,18 +284,50 @@ void setup_line(int cflag)
/* Put the line in slip discipline. */
void slip_discipline()
{
struct ifreq ifr;
int slipdisc = SLIPDISC;
int s, tmp_unit = -1;
/* Switch to slip line discipline. */
if (ioctl(fd, TIOCSETD, &slipdisc) < 0) {
syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
exit_handler(1);
}
/* Assert any compression or no-icmp flags. */
if (ioctl(fd, SIOCSIFFLAGS, &slflags) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
/* find out what unit number we were assigned */
if (ioctl(fd, SLIOCGUNIT, (caddr_t)&tmp_unit) < 0) {
syslog(LOG_ERR, "ioctl(SLIOCGUNIT): %m");
exit_handler(1);
}
if (tmp_unit < 0) {
syslog(LOG_ERR, "bad unit (%d) from ioctl(SLIOCGUNIT)",tmp_unit);
exit_handler(1);
}
/* open a socket as the handle to the interface */
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0) {
syslog(LOG_ERR, "socket: %m");
exit_handler(1);
}
sprintf(ifr.ifr_name, "sl%d", tmp_unit);
/* get the flags for the interface */
if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
exit_handler(1);
}
/* Assert any compression or no-icmp flags. */
#define SLMASK (~(IFF_LINK0 | IFF_LINK1 | IFF_LINK2))
ifr.ifr_flags &= SLMASK;
ifr.ifr_flags |= slflags;
if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
syslog(LOG_ERR, "ioctl (SIOCSIFFLAGS): %m");
exit_handler(1);
}
close(s);
}
/* configure the interface, eg. by passing the unit number to a script. */