salkind%nyu@sri-unix.UUCP (03/07/84)
From: Lou Salkind <salkind@nyu> Subject: rwhod fails on point to point links Index: etc/rwhod/rwhod.c 4.2BSD Description: rwhod will not send datagram packets over point to point links. Fix: The problem is that the SIOCGIFxxx calls clobber the ifr_name field. The easy solution is just to have rwhod.c to set this field again. Add the following strcpy line (around line 366) in rwhod.c: if (np->n_flags & IFF_POINTOPOINT) { strcpy(ifreq.ifr_name, ifr->ifr_name); if (ioctl(s, SIOCGIFDSTADDR, (char *)&ifreq) < 0) { Another reasonable thing to do is to change the kernel so that ifr_name doesn't get clobbered in the first place (I have done this). To make this change, you will have to modify net/if.c:ifunit. Replace the line unit = *cp - '0', *cp = 0; with unit = *cp - '0';