First version

src/core/proto.c

@@ -0,0 +1,25 @@
+#include "stddef.h"
+#include "string.h"
+#include "proto.h"
+
+static struct protocol protocols[0] __protocol_start;
+static struct protocol default_protocols[0] __default_protocol_start;
+static struct protocol protocols_end[0] __protocol_end;
+
+/*
+ * Identify protocol given a name.  name may be NULL, in which case
+ * the first default protocol (if any) will be used.
+ *
+ */
+struct protocol * identify_protocol ( const char *name ) {
+	struct protocol *proto = default_protocols;
+
+	if ( name ) {
+		for ( proto = protocols ; proto < protocols_end ; proto++ ) {
+			if ( strcmp ( name, proto->name ) == 0 )
+				break;
+		}
+	}
+
+	return proto < protocols_end ? proto : NULL;
+}

src/include/proto.h

@@ -0,0 +1,33 @@
+#ifndef PROTO_H
+#define PROTO_H
+
+#include "tables.h"
+
+struct protocol {
+	char *name;
+	int ( * load ) ( const char *name,
+			 int ( * process ) ( unsigned char *data,
+					     unsigned int blocknum,
+					     unsigned int len,
+					     int eof ) );
+};
+
+/*
+ * Protocols that should be used if no explicit protocol is specified
+ * (i.e. tftp) should use __default_protocol; all other protocols
+ * should use __protocol.
+ *
+ */
+#define __protocol_start		__table_start(protocol)
+#define __protocol			__table(protocol,01)
+#define __default_protocol_start	__table(protocol,02)
+#define __default_protocol		__table(protocol,03)
+#define __protocol_end			__table_end(protocol)
+
+/*
+ * Functions in proto.c
+ *
+ */
+extern struct protocol * identify_protocol ( const char *name );
+
+#endif /* PROTO_H */