2  * sys-bsd.c - System-dependent procedures for setting up
3  * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.)
5  * SPDX-License-Identifier: BSD-1-Clause
14  * distribution and use acknowledge that the software was developed
17  * from this software without specific prior written permission.
18  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
78  * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
90  * arp_SetProxy - Make a proxy ARP entry for the peer.
124   arpmsg.hdr.rtm_seq = ++bundle->routing_seq;  in arp_ProxySub()
131   arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg  in arp_ProxySub()
153  * arp_ClearProxy - Delete the proxy ARP entry for the peer.
164  * arp_SetProxy - Make a proxy ARP entry for the peer.
190   ((struct sockaddr_in *)&arpreq.arp_pa)->sin_addr.s_addr = addr.s_addr;  in arp_SetProxy()
201  * arp_ClearProxy - Delete the proxy ARP entry for the peer.
210   ((struct sockaddr_in *)&arpreq.arp_pa)->sin_addr.s_addr = addr.s_addr;  in arp_ClearProxy()
223  * arp_EtherAddr - get the hardware address of an interface on the
236   struct sockaddr_dl *dl;  in arp_EtherAddr()  local
264     if (ifm->ifm_type != RTM_IFINFO)  in arp_EtherAddr()
266     dl = (struct sockaddr_dl *)(ifm + 1);	/* Single _dl at end */  in arp_EtherAddr()
267     skip = (ifm->ifm_flags & (IFF_UP | IFF_BROADCAST | IFF_POINTOPOINT |  in arp_EtherAddr()
269     ptr += ifm->ifm_msglen;			/* First ifa_msghdr */  in arp_EtherAddr()
272       if (ifam->ifam_type != RTM_NEWADDR)	/* finished ? */  in arp_EtherAddr()
274       ptr += ifam->ifam_msglen;  in arp_EtherAddr()
275       if (skip || (ifam->ifam_addrs & (RTA_NETMASK|RTA_IFA)) !=  in arp_EtherAddr()
280           ptr == (char *)ifm + ifm->ifm_msglen + ifam->ifam_msglen)  in arp_EtherAddr()
282                   dl->sdl_nlen, dl->sdl_data);  in arp_EtherAddr()
286       if (sa[RTAX_IFA]->sa_family == AF_INET) {  in arp_EtherAddr()
295           strncpy(a, inet_ntoa(netmask->sin_addr), sizeof a - 1);  in arp_EtherAddr()
296           a[sizeof a - 1] = '\0';  in arp_EtherAddr()
298                      inet_ntoa(ifa->sin_addr), a);  in arp_EtherAddr()
301         if ((ifa->sin_addr.s_addr & netmask->sin_addr.s_addr) ==  in arp_EtherAddr()
302             (ipaddr.s_addr & netmask->sin_addr.s_addr)) {  in arp_EtherAddr()
304                      "Found interface %.*s for %s\n", dl->sdl_nlen,  in arp_EtherAddr()
305                      dl->sdl_data, inet_ntoa(ipaddr));  in arp_EtherAddr()
306           memcpy(hwaddr, dl, dl->sdl_len);  in arp_EtherAddr()