+#ifdef MPPE
+/*
+ * Set MPPE options from plugins.
+ */
+void
+set_mppe_enc_types(int policy, int types)
+{
+ /* Early exit for unknown policies. */
+ if (policy != MPPE_ENC_POL_ENC_ALLOWED ||
+ policy != MPPE_ENC_POL_ENC_REQUIRED)
+ return;
+
+ /* Don't modify MPPE if it's optional and wasn't already configured. */
+ if (policy == MPPE_ENC_POL_ENC_ALLOWED && !ccp_wantoptions[0].mppe)
+ return;
+
+ /*
+ * Disable undesirable encryption types. Note that we don't ENABLE
+ * any encryption types, to avoid overriding manual configuration.
+ */
+ switch(types) {
+ case MPPE_ENC_TYPES_RC4_40:
+ ccp_wantoptions[0].mppe &= ~MPPE_OPT_128; /* disable 128-bit */
+ break;
+ case MPPE_ENC_TYPES_RC4_128:
+ ccp_wantoptions[0].mppe &= ~MPPE_OPT_40; /* disable 40-bit */
+ break;
+ default:
+ break;
+ }
+}
+#endif /* MPPE */