[Cluster-devel] GRE Stateless IP Tunnel Patch

[Doug Smith]

Below is a patch for AIS to allow binding to a GRE stateless tunnel.

This patch has been tested and functions as it should.

For this to work a multicast router software package must also be  
used.  For testing mrouted was used.

This is from our lead developer Jim Leu (jleu at inoc.com) I didn't want  
to take credit for his work:

cat openais-0.80.3-ptp.patch


diff -uNr openais-0.80.3/exec/totemip.c openais-0.80.3-jleu/exec/ 
totemip.c
--- openais-0.80.3/exec/totemip.c	2007-06-24 02:33:09.000000000 -0400
+++ openais-0.80.3-jleu/exec/totemip.c	2008-05-08 18:33:21.000000000  
-0400
@@ -502,6 +502,15 @@
				parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), len);

				memcpy(ipaddr.addr, RTA_DATA(tb[IFA_ADDRESS]), TOTEMIP_ADDRLEN);
+				/*
+				 * For a ptp line IFA_ADDRESS is remote and IFA_LOCAL is local
+				 * Thus for ptp IFA_ADDRESS != IFA_LOCAL.
+				 * For broadcast links IFA_ADDRESS == IFA_LOCAL.
+				 */
+				if (memcmp(RTA_DATA(tb[IFA_LOCAL]), RTA_DATA(tb[IFA_ADDRESS]),  
TOTEMIP_ADDRLEN)) {
+					memcpy(ipaddr.addr, RTA_DATA(tb[IFA_LOCAL]), TOTEMIP_ADDRLEN);
+				}
+
				if (totemip_equal(&ipaddr, bindnet)) {
					found_if = 1;
				}



Thanks,

Doug Smith


--
Doug Smith
System Administrator
INOC
608.663.4555 ext. 202
608.663.4558 fax
dmsmith at inoc.com
www.inoc.com

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