1 files changed, 18 insertions, 4 deletions
diff --git a/lib9p/include/lib9p/9p.h b/lib9p/include/lib9p/9p.h
index b96c938..66f7542 100644
--- a/lib9p/include/lib9p/9p.h
+++ b/lib9p/include/lib9p/9p.h
@@ -7,19 +7,33 @@
 #ifndef _LIB9P_9P_H_
 #define _LIB9P_9P_H_
 
+#include <assert.h>
 #include <stdbool.h>
 #include <sys/types.h> /* for ssize_t */
 
 #include <lib9p/9p.generated.h>
 #include <lib9p/linux-errno.h>
 
+#define _USE_CONFIG_9P_ERR
+#include "config.h"
+
 #define LIB9P_NOTAG ((uint16_t)~0U)
 #define LIB9P_NOFID ((uint32_t)~0U)
 
-struct lib9p_ctx;
-enum lib9p_version      lib9p_ctx_version(struct lib9p_ctx *);
-uint32_t                lib9p_ctx_max_msg_size(struct lib9p_ctx *);
-bool                    lib9p_ctx_has_error(struct lib9p_ctx *);
+struct lib9p_ctx {
+	/* negotiated */
+	enum lib9p_version      version;
+	uint32_t                max_msg_size;
+
+	/* state */
+	uint32_t                err_num;
+	char                    err_msg[CONFIG_9P_MAX_ERR_SIZE];
+};
+
+static bool lib9p_ctx_has_error(struct lib9p_ctx *ctx) {
+	assert(ctx);
+	return ctx->err_num || ctx->err_msg[0];
+}
 
 /** Write an static error into ctx, return -1.  */
 int lib9p_error(struct lib9p_ctx *ctx, uint32_t linux_errno, char const *msg);