Here is small patch for enabling IPX Packet Type 20 propagation
under Linux-2.0.29 (ipx rev. 0.35). After applying this patch
Windows95 will be able to browse computers in Microsoft Networks
in neighboring IPX subnet through Linux IPX router. This one is
tested.
Timophey Kushnir <timophey@fupm-campus.mipt.ru>
--- net/ipx/af_ipx.c.orig Wed Nov 27 10:44:21 1996
+++ net/ipx/af_ipx.c Sat Feb 22 03:28:31 1997
@@ -722,6 +722,7 @@
static const char * ipx_frame_name(unsigned short);
static const char * ipx_device_name(ipx_interface *);
static int ipxrtr_route_skb(struct sk_buff *);
+static int ipxrtr_route_skb_type20(ipx_interface *intrfc, struct sk_buff *);
static int ipxitf_rcv(ipx_interface *intrfc, struct sk_buff *skb)
{
@@ -766,6 +767,22 @@
}
}
+ /*
+ * "This shouldn't happen, but just in case"
+ */
+ if (ipx->ipx_tctrl > ipxcfg_max_hops)
+ {
+ kfree_skb(skb, FREE_READ);
+ return 0;
+ }
+
+ /*
+ * Do the IPX Packet Type 20 routing
+ */
+ if (ipx->ipx_type == IPX_TYPE_PPROP)
+ return ipxrtr_route_skb_type20(intrfc, skb);
+
+
if (ipx->ipx_dest.net == 0L)
ipx->ipx_dest.net = intrfc->if_netnum;
if (ipx->ipx_source.net == 0L)
@@ -1371,6 +1388,51 @@
i = r->ir_intrfc;
(void)ipxitf_send(i, skb, (r->ir_routed) ?
r->ir_router_node : ipx->ipx_dest.node);
+ return 0;
+}
+
+static int
+ipxrtr_route_skb_type20(ipx_interface *intrfc, struct sk_buff *skb)
+{
+ ipx_packet *ipx = (ipx_packet *) (skb->h.raw);
+ unsigned long *net_num = (long *) (ipx + 1);
+ ipx_interface *ipx_if;
+ struct sk_buff *skb2;
+ int i;
+
+ if (ipx->ipx_tctrl > 8)
+ {
+ kfree_skb(skb, FREE_READ);
+ return 0;
+ }
+
+ for(i = 0; i < ipx->ipx_tctrl; ++i)
+ if(intrfc->if_netnum == net_num[i])
+ {
+ kfree_skb(skb, FREE_READ);
+ return 0;
+ }
+
+ net_num[i] = intrfc->if_netnum;
+ ++ipx->ipx_tctrl;
+
+ for(ipx_if = ipx_interfaces; ipx_if != NULL; ipx_if = ipx_if->if_next)
+ {
+ for(i = 0; i < ipx->ipx_tctrl; ++i)
+ if(ipx_if->if_netnum == net_num[i])
+ break;
+
+ if(i != ipx->ipx_tctrl)
+ continue;
+
+ ipx->ipx_dest.net = ipx_if->if_netnum;
+
+ skb2 = skb_clone(skb, GFP_ATOMIC);
+ ipxrtr_route_skb(skb2);
+ }
+
+ kfree_skb(skb, FREE_READ);
+
return 0;
}