log received DH groups and PRFs if no common proposal is found

diff --git a/src/charon/config/proposal.c b/src/charon/config/proposal.c
index e0da8ce..d203f06 100644 (file)
--- a/src/charon/config/proposal.c
+++ b/src/charon/config/proposal.c
@@ -409,8 +409,18 @@ static proposal_t *select_proposal(private_proposal_t *this, private_proposal_t
        }
        else
        {
+               enumerator_t *e;
+               algorithm_t *alg;
+
                selected->destroy(selected);
-               DBG2(DBG_CFG, "  no acceptable PSEUDO_RANDOM_FUNCTION found, skipping");
+               DBG2(DBG_CFG, "  no acceptable PSEUDO_RANDOM_FUNCTION found");
+               DBG2(DBG_CFG, "  list of received PSEUDO_RANDOM_FUNCTION proposals:");
+               e = other->prf_algos->create_enumerator(other->prf_algos);
+               while (e->enumerate(e, &alg))
+               {
+                       DBG2(DBG_CFG, "  %N", pseudo_random_function_names, alg->algorithm);
+               }
+               e->destroy(e);
                return NULL;
        }
        /* select a DH-group */
@@ -423,8 +433,18 @@ static proposal_t *select_proposal(private_proposal_t *this, private_proposal_t
        }
        else
        {
+               enumerator_t *e;
+               algorithm_t *alg;
+
                selected->destroy(selected);
-               DBG2(DBG_CFG, "  no acceptable DIFFIE_HELLMAN_GROUP found, skipping");
+               DBG2(DBG_CFG, "  no acceptable DIFFIE_HELLMAN_GROUP found");
+               DBG2(DBG_CFG, "  list of received DIFFIE_HELLMAN_GROUP proposals:");
+               e = other->dh_groups->create_enumerator(other->dh_groups);
+               while (e->enumerate(e, &alg))
+               {
+                       DBG2(DBG_CFG, "  %N", diffie_hellman_group_names, alg->algorithm);
+               }
+               e->destroy(e);
                return NULL;
        }
        /* select if we use ESNs */
@@ -438,7 +458,7 @@ static proposal_t *select_proposal(private_proposal_t *this, private_proposal_t
        else
        {
                selected->destroy(selected);
-               DBG2(DBG_CFG, "  no acceptable EXTENDED_SEQUENCE_NUMBERS found, skipping");
+               DBG2(DBG_CFG, "  no acceptable EXTENDED_SEQUENCE_NUMBERS found");
                return NULL;
        }
        DBG2(DBG_CFG, "  proposal matches");