X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=send.h;h=836babd50845088be08a2061fe39cc6ffd7760cb;hp=94d8afd82e1c40bbacfdbf501c951e08551362d4;hb=fa578bf1d070161cafcbcc69ca7b810414ee1a4b;hpb=8268a10edbdbb77d9e1b82a27dcc5b2b465412d1

diff --git a/send.h b/send.h
index 94d8afd8..836babd5 100644
--- a/send.h
+++ b/send.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -12,7 +12,7 @@ enum {SENDER_ADD, SENDER_DELETE, SENDER_ALLOW, SENDER_DENY, SENDER_ON, SENDER_OF
 /**
  * Describes one supported sender of para_server.
  *
- * \sa http_send.c ortp_send.c, dccp_send.c.
+ * \sa http_send.c udp_send.c, dccp_send.c.
  */
 struct sender {
 	/** The name of the sender. */
@@ -47,9 +47,10 @@ struct sender {
 	 * only differ if the stream was repositioned by the \a ff or \a jmp
 	 * command. Of course, \a buf is a pointer to the chunk of data which
 	 * should be sent, and \a len is the length of this buffer.
-	*/
+	 */
 	void (*send)(long unsigned current_chunk, long unsigned chunks_sent,
-		const char *buf, size_t len);
+		const char *buf, size_t len, const char *header_buf,
+		size_t header_len);
 	/**
 	 * Add file descriptors to fd_sets.
 	 *
@@ -86,4 +87,99 @@ struct sender {
 	 * pointer means this command is not implemented by this sender.
 	 */
 	int (*client_cmds[NUM_SENDER_CMDS])(struct sender_command_data*);
+	/**
+	 * Resolve target-specific URL string
+	 *
+	 * This method must be defined if the sender supports the add/delete
+	 * subcommands. It interprets a string specifying a target URL in a
+	 * sender-specific fashion (e.g. embedded FEC string). It can also
+	 * fill in sender-specific defaults if necessary.
+	 */
+	int (*resolve_target)(const char *, struct sender_command_data *);
+};
+
+/** Describes one client, connected to a paraslash sender. */
+struct sender_client {
+	/** The file descriptor of the client. */
+	int fd;
+	/** The socket "name" of the client. */
+	char *name;
+	/** The position of this client in the client list. */
+	struct list_head node;
+	/** Non-zero if audio file header has been sent. */
+	int header_sent;
+	/** The list of pending chunks for this client. */
+	struct chunk_queue *cq;
+	/** Data specific to the particular sender. */
+	void *private_data;
 };
+
+/**
+ * Each paraslash sender may register arbitrary many clients to the virtual
+ * streaming system, possibly with varying fec parameters. In order to do so,
+ * it must allocate a \a fec_client_parms structure and pass it to \ref
+ * vss_add_fec_client.
+ *
+ * Clients are automatically removed from that list by the vss if an error
+ * occurs, or if the sender requests deletion of a client by calling \ref
+ * vss_del_fec_client().
+ */
+
+/** FEC parameters requested by FEC clients. */
+struct fec_client_parms {
+	/** Number of data slices plus redundant slices. */
+	uint8_t slices_per_group;
+	/** Number of slices minus number of redundant slices. */
+	uint8_t data_slices_per_group;
+	/** Whether the header must be sent periodically. */
+	bool need_periodic_header;
+	/**
+	 * Transport-layer initialisation for FEC support.
+	 *
+	 * This optional function serves (a) to make the transport layer
+	 * ready to send FEC slices and (b) to determine the Maximum
+	 * Packet Size (MPS) supported by the connection. The MPS value
+	 * determines the largest payload size. This value is used to
+	 * send FEC slices that are not larger than the path MTU, to avoid
+	 * fragmentation and to maximize packet utilization. The user can
+	 * alternatively specify a slice size of up to this value.
+	 */
+	int (*init_fec)(struct sender_client *sc);
+	/** Push out FEC-encoded packets */
+	int (*send_fec)(struct sender_client *sc, char *buf, size_t len);
+};
+
+/** Describes the current status of one paraslash sender. */
+struct sender_status {
+	/** The file descriptor of the socket this sender is listening on. */
+	int listen_fd;
+	/** The TCP/DCCP port used by this sender. */
+	int port;
+	/** The current number of simultaneous connections. */
+	int num_clients;
+	/** The maximal number of simultaneous connections. */
+	int max_clients;
+	/** Whether the access control list is a whitelist. */
+	int default_deny;
+	/** The whitelist/blacklist. */
+	struct list_head acl;
+	/** The list of connected clients. */
+	struct list_head client_list;
+};
+
+void shutdown_client(struct sender_client *sc, struct sender_status *ss);
+void shutdown_clients(struct sender_status *ss);
+void init_sender_status(struct sender_status *ss, char **access_arg, int num_access_args,
+	int port, int max_clients, int default_deny);
+char *get_sender_info(struct sender_status *ss, const char *name);
+
+void generic_com_allow(struct sender_command_data *scd,
+		struct sender_status *ss);
+void generic_com_deny(struct sender_command_data *scd,
+		struct sender_status *ss);
+int generic_com_on(struct sender_status *ss, unsigned protocol);
+void generic_com_off(struct sender_status *ss);
+char *generic_sender_help(void);
+struct sender_client *accept_sender_client(struct sender_status *ss, fd_set *rfds);
+int send_queued_chunks(int fd, struct chunk_queue *cq);
+int parse_fec_url(const char *arg, struct sender_command_data *scd);