Add LZ4 compression support

[tinc] / src / protocol_key.c

diff --git a/src/protocol_key.c b/src/protocol_key.c
index d9c58d9..b93bec1 100644 (file)
--- a/src/protocol_key.c
+++ b/src/protocol_key.c
@@ -462,8 +462,49 @@ bool ans_key_h(connection_t *c, const char *request) {
                from->status.validkey = false;
        }
 
-       if(compression < 0 || compression > 11) {
+       switch(compression) {
+       case 12:
+#ifdef HAVE_LZ4
+               break;
+#else
+               logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses bogus compression level!", from->name, from->hostname);
+               logger(DEBUG_ALWAYS, LOG_ERR, "LZ4 compression is unavailable on this node.");
+               return true;
+#endif
+
+       case 11:
+       case 10:
+#ifdef HAVE_LZO
+               break;
+#else
+               logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses bogus compression level!", from->name, from->hostname);
+               logger(DEBUG_ALWAYS, LOG_ERR, "LZO compression is unavailable on this node.");
+               return true;
+#endif
+
+       case 9:
+       case 8:
+       case 7:
+       case 6:
+       case 5:
+       case 4:
+       case 3:
+       case 2:
+       case 1:
+#ifdef HAVE_ZLIB
+               break;
+#else
+               logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses bogus compression level!", from->name, from->hostname);
+               logger(DEBUG_ALWAYS, LOG_ERR, "ZLIB compression is unavailable on this node.");
+               return true;
+#endif
+
+       case 0:
+               break;
+
+       default:
                logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses bogus compression level!", from->name, from->hostname);
+               logger(DEBUG_ALWAYS, LOG_ERR, "Compression level %i is unrecognized by this node.", compression);
                return true;
        }