dhcpv4: detect noarp interfaces

[project/odhcpd.git] / src / dhcpv4.c

diff --git a/src/dhcpv4.c b/src/dhcpv4.c
index 7ac7af9e73b7d5197bb32991d7217d850753061f..2b2f41e01cc3469f623186e425e31a835dc3eed8 100644 (file)
--- a/src/dhcpv4.c
+++ b/src/dhcpv4.c
@@ -897,12 +897,14 @@ void dhcpv4_handle_msg(void *addr, void *data, size_t len,
                dest.sin_addr = reply.yiaddr;
                dest.sin_port = htons(DHCPV4_CLIENT_PORT);
 
-               memcpy(arp.arp_ha.sa_data, req->chaddr, 6);
-               memcpy(&arp.arp_pa, &dest, sizeof(arp.arp_pa));
-               memcpy(arp.arp_dev, iface->ifname, sizeof(arp.arp_dev));
+               if (!(iface->ifflags & IFF_NOARP)) {
+                       memcpy(arp.arp_ha.sa_data, req->chaddr, 6);
+                       memcpy(&arp.arp_pa, &dest, sizeof(arp.arp_pa));
+                       memcpy(arp.arp_dev, iface->ifname, sizeof(arp.arp_dev));
 
-               if (ioctl(sock, SIOCSARP, &arp) < 0)
-                       syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
+                       if (ioctl(sock, SIOCSARP, &arp) < 0)
+                               syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
+               }
        }
 
        if (send_reply(&reply, PACKET_SIZE(&reply, cookie),