[MEDIUM] stick_table: add room for extra data types
The stick_tables will now be able to store extra data for a same key.
A limited set of extra data types will be defined and for each of them
an offset in the sticky session will be assigned at startup time. All
of this information will be stored in the stick table.
The extra data types will have to be specified after the new "store"
keyword of the "stick-table" directive, which will reserve some space
for them.
diff --git a/include/proto/stick_table.h b/include/proto/stick_table.h
index f26e002..01cd391 100644
--- a/include/proto/stick_table.h
+++ b/include/proto/stick_table.h
@@ -3,6 +3,7 @@
* Functions for stick tables management.
*
* Copyright (C) 2009-2010 EXCELIANCE, Emeric Brun <ebrun@exceliance.fr>
+ * Copyright (C) 2010 Willy Tarreau <w@1wt.eu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -36,6 +37,23 @@
void *l7, int dir, struct pattern_expr *expr,
unsigned long table_type);
int stktable_compatible_pattern(struct pattern_expr *expr, unsigned long table_type);
+int stktable_get_data_type(char *name);
+
+/* reserve some space for data type <type>. Return non-0 if OK, or 0 if already
+ * allocated (or impossible type).
+ */
+static inline int stktable_alloc_data_type(struct stktable *t, int type)
+{
+ if (type >= STKTABLE_DATA_TYPES)
+ return 0;
+
+ if (t->data_ofs[type])
+ /* already allocated */
+ return 0;
+ t->data_size += stktable_data_types[type].data_length;
+ t->data_ofs[type] = -t->data_size;
+ return 1;
+}
#endif /* _PROTO_STICK_TABLE_H */