-/*
- * Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file dccp_send.c Paraslash's dccp sender. */
#include "error.h"
#include "string.h"
#include "afh.h"
-#include "server.h"
#include "net.h"
+#include "server.h"
#include "list.h"
-#include "send.h"
#include "sched.h"
+#include "send.h"
#include "vss.h"
#include "fd.h"
-#include "close_on_fork.h"
-#include "chunk_queue.h"
-#include "acl.h"
static struct sender_status dccp_sender_status, *dss = &dccp_sender_status;
struct fec_client *fc;
};
-static void dccp_pre_select(int *max_fileno, fd_set *rfds,
- __a_unused fd_set *wfds)
+static void dccp_pre_monitor(struct sched *s)
{
- if (dss->listen_fd >= 0)
- para_fd_set(dss->listen_fd, rfds, max_fileno);
+ unsigned n;
+
+ FOR_EACH_LISTEN_FD(n, dss)
+ if (dss->listen_fds[n] >= 0)
+ sched_monitor_readfd(dss->listen_fds[n], s);
}
+#ifndef DCCP_SOCKOPT_TX_CCID
+#define DCCP_SOCKOPT_TX_CCID 14 /**< Set/get the TX CCID. */
+#endif
+
/**
* Query the TX CCID used on the sender-client half connection.
* \param sockfd Server socket descriptor to query (after accept(2)).
dccp_shutdown_client(sc);
}
+static void dccp_shutdown(void)
+{
+ dccp_shutdown_clients();
+ generic_acl_deplete(&dss->acl);
+ free_sender_status(dss);
+}
+
+#ifndef DCCP_SOCKOPT_GET_CUR_MPS
+#define DCCP_SOCKOPT_GET_CUR_MPS 5 /**< Max packet size, RFC 4340, 14. */
+#endif
+
+/** Estimated worst-case length of a DCCP header including options. */
+#define DCCP_MAX_HEADER 128
+
/** * Obtain current MPS according to RFC 4340, sec. 14. */
static int dccp_init_fec(struct sender_client *sc)
{
dccp_shutdown_client(sc);
}
-static void dccp_post_select(fd_set *rfds, __a_unused fd_set *wfds)
+static void dccp_post_monitor(__a_unused struct sched *s)
{
struct sender_client *sc;
struct dccp_fec_client *dfc;
int tx_ccid;
uint32_t k, n;
- sc = accept_sender_client(dss, rfds);
+ sc = accept_sender_client(dss);
if (!sc)
return;
/*
* Bypass unused CCID paths: the sender does not receive application data
* from the client; by shutting down this unused communication path we can
- * reduce processing costs a bit. See analogous comment in dccp_recv.c.
+ * reduce processing costs a bit. See analogous comment in \ref dccp_recv.c.
*/
if (shutdown(sc->fd, SHUT_RD) < 0) {
PARA_WARNING_LOG("%s\n", strerror(errno));
shutdown_client(sc, dss);
return;
}
- dfc = para_calloc(sizeof(*dfc));
+ dfc = zalloc(sizeof(*dfc));
sc->private_data = dfc;
k = OPT_UINT32_VAL(DCCP_DATA_SLICES_PER_GROUP);
n = OPT_UINT32_VAL(DCCP_SLICES_PER_GROUP);
static int dccp_com_on(__a_unused struct sender_command_data *scd)
{
- return generic_com_on(dss, IPPROTO_DCCP);
+ generic_com_on(dss, IPPROTO_DCCP);
+ return 1;
}
static int dccp_com_off(__a_unused struct sender_command_data *scd)
return result;
}
-/**
- * The init function of the dccp sender.
- *
- * \param s pointer to the dccp sender struct.
- *
- * It initializes all function pointers of \a s and starts
- * listening on the given port.
+/*
+ * Initialize the client list and the access control list and listen on the
+ * dccp port.
*/
-void dccp_send_init(struct sender *s)
+static void dccp_send_init(void)
{
- int ret;
-
- s->status = dccp_status;
- s->send = NULL;
- s->pre_select = dccp_pre_select;
- s->post_select = dccp_post_select;
- s->shutdown_clients = dccp_shutdown_clients;
- s->resolve_target = NULL;
- s->help = generic_sender_help;
- s->client_cmds[SENDER_on] = dccp_com_on;
- s->client_cmds[SENDER_off] = dccp_com_off;
- s->client_cmds[SENDER_deny] = dccp_com_deny;
- s->client_cmds[SENDER_allow] = dccp_com_allow;
- s->client_cmds[SENDER_add] = NULL;
- s->client_cmds[SENDER_delete] = NULL;
-
init_sender_status(dss, OPT_RESULT(DCCP_ACCESS),
+ OPT_RESULT(DCCP_LISTEN_ADDRESS),
OPT_UINT32_VAL(DCCP_PORT), OPT_UINT32_VAL(DCCP_MAX_CLIENTS),
OPT_GIVEN(DCCP_DEFAULT_DENY));
- ret = generic_com_on(dss, IPPROTO_DCCP);
- if (ret < 0)
- PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ if (OPT_GIVEN(DCCP_NO_AUTOSTART))
+ return;
+ generic_com_on(dss, IPPROTO_DCCP);
}
+
+/**
+ * The DCCP sender.
+ *
+ * This sender offers congestion control not available in plain TCP. Most
+ * methods of the sender structure are implemented as simple wrappers for the
+ * generic functions defined in \ref send_common.c. Like UDP streams, DCCP
+ * streams are sent FEC-encoded.
+ */
+const struct sender dccp_sender = {
+ .name = "dccp",
+ .init = dccp_send_init,
+ .shutdown = dccp_shutdown,
+ .pre_monitor = dccp_pre_monitor,
+ .post_monitor = dccp_post_monitor,
+ .shutdown_clients = dccp_shutdown_clients,
+ .client_cmds = {
+ [SENDER_on] = dccp_com_on,
+ [SENDER_off] = dccp_com_off,
+ [SENDER_deny] = dccp_com_deny,
+ [SENDER_allow] = dccp_com_allow,
+ },
+ .help = generic_sender_help,
+ .status = dccp_status,
+};
projects / paraslash.git / blobdiff