-/*
- * Copyright (C) 2006-2013 Andre Noll <maan@systemlinux.org>
- *
- * 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. */
* (C) 2005 Ian McDonald <imcdnzl@gmail.com>
*/
+#include <netinet/in.h>
+#include <sys/socket.h>
#include <regex.h>
#include <sys/types.h>
-#include <osl.h>
+#include <arpa/inet.h>
+#include <sys/un.h>
+#include <netdb.h>
+#include <lopsub.h>
+#include "server.lsg.h"
#include "para.h"
#include "error.h"
#include "string.h"
#include "afh.h"
-#include "afs.h"
-#include "server.h"
#include "net.h"
+#include "server.h"
#include "list.h"
#include "send.h"
#include "sched.h"
#include "vss.h"
#include "fd.h"
-#include "close_on_fork.h"
-#include "chunk_queue.h"
-#include "server.cmdline.h"
-#include "acl.h"
static struct sender_status dccp_sender_status, *dss = &dccp_sender_status;
static void dccp_pre_select(int *max_fileno, fd_set *rfds,
__a_unused fd_set *wfds)
{
- 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)
+ para_fd_set(dss->listen_fds[n], rfds, max_fileno);
}
/**
dccp_shutdown_client(sc);
}
+static void dccp_shutdown(void)
+{
+ dccp_shutdown_clients();
+ generic_acl_deplete(&dss->acl);
+ free_sender_status(dss);
+}
+
/** * Obtain current MPS according to RFC 4340, sec. 14. */
static int dccp_init_fec(struct sender_client *sc)
{
int mps, ret;
socklen_t ml = sizeof(mps);
+ uint32_t mss; /* max slize size */
/* If call fails, return some sensible minimum value */
ret = getsockopt(sc->fd, SOL_DCCP, DCCP_SOCKOPT_GET_CUR_MPS, &mps, &ml);
}
PARA_INFO_LOG("current MPS = %d bytes\n", mps);
assert(mps > 0);
- if (conf.dccp_max_slice_size_arg > 0)
- mps = PARA_MIN(mps, conf.dccp_max_slice_size_arg);
+ mss = OPT_UINT32_VAL(DCCP_MAX_SLICE_SIZE);
+ if (mss > 0 && mss <= INT_MAX)
+ mps = PARA_MIN(mps, (int)mss);
return mps;
}
struct sender_client *sc;
struct dccp_fec_client *dfc;
int tx_ccid;
+ uint32_t k, n;
sc = accept_sender_client(dss, rfds);
if (!sc)
/*
* 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));
}
dfc = para_calloc(sizeof(*dfc));
sc->private_data = dfc;
- dfc->fcp.data_slices_per_group = conf.dccp_data_slices_per_group_arg;
- dfc->fcp.slices_per_group = conf.dccp_slices_per_group_arg;
+ k = OPT_UINT32_VAL(DCCP_DATA_SLICES_PER_GROUP);
+ n = OPT_UINT32_VAL(DCCP_SLICES_PER_GROUP);
+ if (k == 0 || n == 0 || k >= n) {
+ PARA_WARNING_LOG("invalid FEC parameters, using defaults\n");
+ dfc->fcp.data_slices_per_group = 3;
+ dfc->fcp.slices_per_group = 4;
+ } else {
+ dfc->fcp.data_slices_per_group = k;
+ dfc->fcp.slices_per_group = n;
+ }
dfc->fcp.init_fec = dccp_init_fec;
dfc->fcp.send_fec = dccp_send_fec;
dfc->fcp.need_periodic_header = false;
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 list;
}
-static char *dccp_info(void)
+static char *dccp_status(void)
{
- char *info = get_sender_info(dss, "dccp");
- char *ret = make_message("%s" "\tsupported ccids: %s\n",
- info, dccp_list_available_ccids());
- free(info);
- return ret;
+ char *status = generic_sender_status(dss, "dccp");
+ char *result = make_message("%ssupported ccids: %s\n", status,
+ dccp_list_available_ccids());
+ free(status);
+ 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, k, n;
-
- s->info = dccp_info;
- 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;
-
- k = conf.dccp_data_slices_per_group_arg;
- n = conf.dccp_slices_per_group_arg;
-
- if (k <= 0 || n <= 0 || k >= n) {
- PARA_WARNING_LOG("invalid FEC parameters, using defaults\n");
- conf.dccp_data_slices_per_group_arg = 3;
- conf.dccp_slices_per_group_arg = 4;
- }
-
- init_sender_status(dss, conf.dccp_access_arg, conf.dccp_access_given,
- conf.dccp_port_arg, conf.dccp_max_clients_arg,
- conf.dccp_default_deny_given);
- ret = generic_com_on(dss, IPPROTO_DCCP);
- if (ret < 0)
- PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ 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));
+ 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_select = dccp_pre_select,
+ .post_select = dccp_post_select,
+ .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