pppoe: use the interface mtu as upper limit for ppp packet size + header (based on...

SVN-Revision: 5009

diff --git a/openwrt/target/linux/linux-2.4/patches/generic/222-pppoe_mtu_fix.patch b/openwrt/target/linux/linux-2.4/patches/generic/222-pppoe_mtu_fix.patch
new file mode 100644 (file)
index 0000000..c2e4f06
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/222-pppoe_mtu_fix.patch
@@ -0,0 +1,12 @@
+--- linux-2.4.30/drivers/net/pppoe.c.old       2006-10-10 13:49:12.000000000 +0200
++++ linux-2.4.30/drivers/net/pppoe.c   2006-10-10 13:50:02.000000000 +0200
+@@ -639,6 +639,9 @@
+               po->chan.hdrlen = (sizeof(struct pppoe_hdr) +
+                                  dev->hard_header_len);
+ 
++              if (po->chan.mtu > dev->mtu - sizeof(struct pppoe_hdr))
++                      po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr);
++
+               po->chan.private = sk;
+               po->chan.ops = &pppoe_chan_ops;
+