-/*
- * Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file send.h Sender-related defines and structures. */
-/** The sender subcommands. */
+/**
+ * A little preprocessor fu helps to create the sender_subcommand enumeration
+ * below and the list of sender name strings without duplicating the commands.
+ */
+#define SENDER_SUBCOMMANDS \
+ SENDER_SUBCOMMAND(add) /**< Add a target (udp only). */ \
+ SENDER_SUBCOMMAND(delete) /**< Delete a target (udp only). */ \
+ SENDER_SUBCOMMAND(allow) /**< Allow connections from given IP address(es). */ \
+ SENDER_SUBCOMMAND(deny) /**< Deny connections from given IP address(es). */ \
+ SENDER_SUBCOMMAND(on) /**< Activate the sender. */ \
+ SENDER_SUBCOMMAND(off) /**< Deactivate the sender. */ \
+
+/** Concatenate "SENDER_" and the given arg and append a comma. */
+#define SENDER_SUBCOMMAND(_name) SENDER_ ## _name,
+
+/**
+ * Each sender subcommand gets an SENDER_xxx identifier. The identifier is
+ * passed from the sender command handler to the server process via shared
+ * memory.
+ */
enum sender_subcommand {
- SENDER_ADD, /**< Add a target (udp only). */
- SENDER_DELETE, /**< Delete a target (udp only). */
- SENDER_ALLOW, /**< Allow connections from given IP address(es). */
- SENDER_DENY, /**< Deny connections from given IP address(es). */
- SENDER_ON, /**< Activate the sender. */
- SENDER_OFF, /**< Deactivate the sender. */
+ SENDER_SUBCOMMANDS /**< List of SENDER_xxx identifiers. */
NUM_SENDER_CMDS /**< Used as array size in struct \ref sender. */
};
+#undef SENDER_SUBCOMMAND
+
+/**
+ * Redefine it to expand to the stringified name of the sender so that
+ * SENDER_SUBCOMMANDS above now expands to the comma-separated list of sender
+ * name strings. This is used in command.c to define and initialize an array of
+ * char pointers.
+ */
+#define SENDER_SUBCOMMAND(_name) #_name,
+
/**
* Describes one supported sender of para_server.
*
- * \sa http_send.c udp_send.c, dccp_send.c.
+ * \sa \ref http_send.c \ref udp_send.c, \ref dccp_send.c.
*/
struct sender {
/** The name of the sender. */
const char *name;
/**
- * The init function of this sender.
- *
- * It must fill in all function pointers of \a s as well as the \a
- * client_cmds array, see below. It should also do all necessary
- * preparations to init this sending facility, for example it could
- * open a tcp port.
+ * Parse the command line options and initialize this sender (e.g.,
+ * initialize target or access control lists, listen on a network
+ * socket, etc.).
*/
- void (*init)(struct sender *s);
+ void (*init)(void);
/**
* Return the help text of this sender.
*
* the clients aware of the end-of-file condition.
*/
void (*shutdown_clients)(void);
+ /** Dellocate all resources. Only called on exit. */
+ void (*shutdown)(void);
/**
* Array of function pointers for the sender subcommands.
*
int (*resolve_target)(const char *, struct sender_command_data *);
};
+/** NULL-terminated list, defined in \ref vss.c. */
+extern const struct sender * const senders[];
+/** Iterate over all senders. */
+#define FOR_EACH_SENDER(_i) for ((_i) = 0; senders[(_i)]; (_i)++)
+
/** Describes one client, connected to a paraslash sender. */
struct sender_client {
/** The file descriptor of the client. */
/** 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;
+ /** Number of sockets to listen on, size of the two arrays below. */
+ unsigned num_listen_fds;
+ /** Derived from --http-listen-address and --dccp-listen-address. */
+ char **listen_addresses;
+ /** Default TCP/DCCP port number for addresses w/o port. */
+ int default_port;
+ /** The socket fd(s) this sender is listening on. */
+ int *listen_fds;
/** The current number of simultaneous connections. */
int num_clients;
/** The maximal number of simultaneous connections. */
struct list_head client_list;
};
+/** Iterate over all listening addresses of the http/dccp sender. */
+#define FOR_EACH_LISTEN_FD(_n, _ss) for (_n = 0; _n < (_ss)->num_listen_fds; _n++)
+
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);
+void init_sender_status(struct sender_status *ss,
+ const struct lls_opt_result *acl_opt_result,
+ const struct lls_opt_result *listen_address_opt_result,
+ int default_port, int max_clients, int default_deny);
char *generic_sender_status(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_on(struct sender_status *ss, unsigned protocol);
+void generic_acl_deplete(struct list_head *acl);
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);
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