ipoe: fixed incorrect arp reply (reply for request which started session)

accel-pppd/ctrl/ipoe/arp.c

@@ -120,6 +120,7 @@ void arp_send(int ifindex, struct _arphdr *arph)
 	dst.sll_family = AF_PACKET;
 	dst.sll_ifindex = ifindex;
 	dst.sll_protocol = htons(ETH_P_ARP);
+	memcpy(dst.sll_addr, arph->ar_tha, ETH_ALEN);
 
 	arph->ar_op = htons(ARPOP_REPLY);
 

accel-pppd/ctrl/ipoe/ipoe.c

@@ -892,6 +892,19 @@ static void __ipoe_session_activate(struct ipoe_session *ses)
 	} else
 		ses->ctrl.dont_ifcfg = 0;
 
+	if (ses->arph) {
+		if (ses->arph->ar_tpa == ses->router) {
+			memcpy(ses->arph->ar_tha, ses->arph->ar_sha, ETH_ALEN);
+			memcpy(ses->arph->ar_sha, ses->serv->hwaddr, ETH_ALEN);
+			ses->arph->ar_tpa = ses->arph->ar_spa;
+			ses->arph->ar_spa = ses->router;
+			arp_send(ses->serv->ifindex, ses->arph);
+		}
+
+		_free(ses->arph);
+		ses->arph = NULL;
+	}
+
 	if (ses->serv->opt_mode == MODE_L2 && ses->serv->opt_ipv6 && sock6_fd != -1) {
 		ses->ses.ipv6 = ipdb_get_ipv6(&ses->ses);
 		if (!ses->ses.ipv6)
@@ -919,14 +932,6 @@ static void __ipoe_session_activate(struct ipoe_session *ses)
 
 		dhcpv4_packet_free(ses->dhcpv4_request);
 		ses->dhcpv4_request = NULL;
-	} else if (ses->arph) {
-		if (ses->arph->ar_tpa == ses->router) {
-			memcpy(ses->arph->ar_tha, ses->serv->hwaddr, ETH_ALEN);
-			arp_send(ses->serv->ifindex, ses->arph);
-		}
-
-		_free(ses->arph);
-		ses->arph = NULL;
 	}
 
 	ses->timer.expire = ipoe_session_timeout;