From 2f7fef569b4aa30ba588b483fc139ca4c27362f6 Mon Sep 17 00:00:00 2001
From: Tobias Brunner <tobias@strongswan.org>
Date: Fri, 15 Aug 2014 15:59:12 +0200
Subject: [PATCH] ikev1: Skip unusable IPComp proposals

Fixes #661.
---
 src/libcharon/encoding/payloads/sa_payload.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libcharon/encoding/payloads/sa_payload.c b/src/libcharon/encoding/payloads/sa_payload.c
index 59dac216d..407038a2d 100644
--- a/src/libcharon/encoding/payloads/sa_payload.c
+++ b/src/libcharon/encoding/payloads/sa_payload.c
@@ -369,7 +369,7 @@ METHOD(sa_payload_t, get_ipcomp_proposals, linked_list_t*,
 		}
 		if (proposal_number != current_proposal)
 		{	/* start of a new proposal */
-			if (espah && ipcomp)
+			if (espah && ipcomp && ipcomp->get_cpi(ipcomp, NULL))
 			{	/* previous proposal is valid */
 				break;
 			}