main/ipsec-tools: add a patch to modify receive buffer size

this fixing behaviour on long backbuffer of packets to start
dropping packets instead of processing them late.
(cherry picked from commit d9500f76)

main/ipsec-tools/70-rcvbuf-size.patch

+Index: src/racoon/isakmp.c
+===================================================================
+RCS file: /cvsroot/src/crypto/dist/ipsec-tools/src/racoon/isakmp.c,v
+retrieving revision 1.60
+diff -u -r1.60 isakmp.c
+--- a/src/racoon/isakmp.c	3 Sep 2009 09:29:07 -0000	1.60
++++ b/src/racoon/isakmp.c	20 Aug 2010 11:59:20 -0000
+@@ -1579,6 +1579,7 @@
+ #ifdef ENABLE_NATT
+ 	int option = -1;
+ #endif
++        int rcvSize = 16384;
+ 
+ 	/* warn if wildcard address - should we forbid this? */
+ 	switch (addr->sa_family) {
+@@ -1706,6 +1707,17 @@
+ 		goto err;
+ 	}
+ 
++	/* set receive buffer size - shouldn't be too large otherwise
++	 * we can acommodate too long backbuffer of packets and not
++	 * able to handle any packets in real time */
++	if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
++	                (void*) &rcvSize, sizeof(rcvSize)) < 0) {
++                plog(LLV_ERROR, LOCATION, NULL,
++                     "failed to set SO_RCVBUF size (%s).\n",
++                     strerror(errno));
++                /* soft-error, continue even if this failed */
++        }
++
+ 	if (setsockopt_bypass(fd, addr->sa_family) < 0)
+ 		goto err;
+ 

main/ipsec-tools/APKBUILD

@@ -2,7 +2,7 @@
 pkgname=ipsec-tools
 pkgver=0.8_alpha20090903
 _myver=0.8-alpha20090903
-pkgrel=9
+pkgrel=10
 pkgdesc="User-space IPsec tools for various IPsec implementations"
 url="http://ipsec-tools.sourceforge.net/"
 license="BSD"
@@ -16,6 +16,7 @@ source="http://downloads.sourceforge.net/$pkgname/$pkgname-$_myver.tar.gz
 	60-debug-quick.patch
 	initial-contact-fix.diff
 	fd-priorities.patch
+	70-rcvbuf-size.patch
 	90-openssl-oneshot.patch
 	"
 
@@ -64,4 +65,5 @@ md5sums="8ec28d4e89c0f5e49ae2caa7463fbcfd  ipsec-tools-0.8-alpha20090903.tar.gz
 baa13d7f0f48955c792f7fcd42a8587a  60-debug-quick.patch
 69e06c5cc3a0c1cc8b10ddc89d1e644b  initial-contact-fix.diff
 c1e8b8dc80ef4b5d79fece52a4865e68  fd-priorities.patch
+f40c78e4ca4b92d2bf74e4fcf3a8d91f  70-rcvbuf-size.patch
 11e2c21e443edab17725f74ffeaddb76  90-openssl-oneshot.patch"