X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=command.h;h=5b01eb79e3500f34d135d1bdc8db6ac8ec4ad59c;hp=5e1a4ce3edc1a8812948ada45eecd2f76df4f7be;hb=534a94f441767947874cb15d18211edf758e9277;hpb=16c6fc10f3344e3eec66e51580821d854d49aa62

diff --git a/command.h b/command.h
index 5e1a4ce3..5b01eb79 100644
--- a/command.h
+++ b/command.h
@@ -6,19 +6,55 @@ struct command_context {
 	const char *peer;
 	/** The paraslash user that executes this command. */
 	struct user *u;
-	/** Argument count. */
-	int argc;
-	/** Argument vector. */
-	char **argv;
 	/** File descriptor and crypto keys. */
 	struct stream_cipher_context scc;
 };
 
+/** Prototype of a server command handler. */
+typedef int (*server_cmd_handler_t)(struct command_context *,
+		struct lls_parse_result *);
+
+/**
+ * The lopsub user data structure for server commands.
+ *
+ * One such structure exists for each server command. Lopsub maintains
+ * references to the user data structures and provides lls_user_data() for
+ * applications to fetch the user data pointer of a given command. This
+ * mechanism is used by the dispatcher of command.c to run the command handler.
+ */
+struct server_cmd_user_data {
+	/** Pointer to the command handler. */
+	server_cmd_handler_t handler;
+};
+
+/** Define the user data structure for one command. */
+#define EXPORT_SERVER_CMD_HANDLER(_cmd) \
+	const struct server_cmd_user_data lsg_server_cmd_com_ ## _cmd ## _user_data = { \
+		.handler = com_ ## _cmd \
+	};
+
+/** Get the lopsub command pointer by command name. */
+#define SERVER_CMD_CMD_PTR(_cmd) \
+	(lls_cmd(LSG_SERVER_CMD_CMD_ ## _cmd, server_cmd_suite))
+
+/** Get the lopsub parse result of an option. */
+#define SERVER_CMD_OPT_RESULT(_cmd, _opt, _lpr) \
+		(lls_opt_result(LSG_SERVER_CMD_ ## _cmd ## _OPT_ ## _opt, _lpr))
+
+/** How many times an option was given. */
+#define SERVER_CMD_OPT_GIVEN(_cmd, _opt, _lpr) \
+	(lls_opt_given(SERVER_CMD_OPT_RESULT(_cmd, _opt, _lpr)))
+
+/** Fetch the (first) argument given to an option of type uint32. */
+#define SERVER_CMD_UINT32_VAL(_cmd, _opt, _lpr) \
+	(lls_uint32_val(0, SERVER_CMD_OPT_RESULT(_cmd, _opt, _lpr)))
+
 int send_sb(struct stream_cipher_context *scc, void *buf, size_t numbytes,
 		int band, bool dont_free);
 __printf_3_4 int send_sb_va(struct stream_cipher_context *scc, int band,
 		const char *fmt, ...);
 int send_strerror(struct command_context *cc, int err);
+int send_errctx(struct command_context *cc, char *errctx);
 int recv_sb(struct stream_cipher_context *scc,
 		enum sb_designator expected_band,
 		size_t max_size, struct iovec *result);