/*
- * Copyright (C) 2006-2010 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
* (C) 2005 Ian McDonald <imcdnzl@gmail.com>
*/
+#include <netinet/in.h>
+#include <sys/socket.h>
#include <regex.h>
#include <sys/types.h>
-#include <dirent.h>
-#include <osl.h>
+#include <arpa/inet.h>
+#include <sys/un.h>
+#include <netdb.h>
#include "para.h"
#include "error.h"
#include "string.h"
#include "afh.h"
-#include "afs.h"
#include "server.h"
#include "net.h"
#include "list.h"
-#include "vss.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"
-/** Do not write more than that many bytes at once. */
-#define DCCP_MAX_BYTES_PER_WRITE 1024
-
static struct sender_status dccp_sender_status, *dss = &dccp_sender_status;
+struct dccp_fec_client {
+ struct fec_client_parms fcp;
+ struct fec_client *fc;
+};
+
static void dccp_pre_select(int *max_fileno, fd_set *rfds,
__a_unused fd_set *wfds)
{
return tx_ccid;
}
+static void dccp_shutdown_client(struct sender_client *sc)
+{
+ struct dccp_fec_client *dfc = sc->private_data;
+
+ vss_del_fec_client(dfc->fc);
+ shutdown_client(sc, dss);
+}
+
+static void dccp_shutdown_clients(void)
+{
+ struct sender_client *sc, *tmp;
+
+ list_for_each_entry_safe(sc, tmp, &dss->client_list, node)
+ dccp_shutdown_client(sc);
+}
+
+/** * 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);
+
+ /* If call fails, return some sensible minimum value */
+ ret = getsockopt(sc->fd, SOL_DCCP, DCCP_SOCKOPT_GET_CUR_MPS, &mps, &ml);
+ if (ret < 0) {
+ PARA_NOTICE_LOG("can not determine MPS: %s\n", strerror(errno));
+ mps = generic_max_transport_msg_size(sc->fd) - DCCP_MAX_HEADER;
+ }
+ 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);
+ return mps;
+}
+
+static void dccp_send_fec(struct sender_client *sc, char *buf, size_t len)
+{
+ int ret = xwrite(sc->fd, buf, len);
+
+ if (ret < 0)
+ dccp_shutdown_client(sc);
+}
+
static void dccp_post_select(fd_set *rfds, __a_unused fd_set *wfds)
{
struct sender_client *sc;
+ struct dccp_fec_client *dfc;
int tx_ccid;
- if (dss->listen_fd < 0 || !FD_ISSET(dss->listen_fd, rfds))
- return;
- sc = accept_sender_client(dss);
+ sc = accept_sender_client(dss, rfds);
if (!sc)
return;
* from the client; by shutting down this unused communication path we can
* reduce processing costs a bit. See analogous comment in dccp_recv.c.
*/
- if (shutdown(sc->fd, SHUT_RD) >= 0)
+ if (shutdown(sc->fd, SHUT_RD) < 0) {
+ PARA_WARNING_LOG("%s\n", strerror(errno));
+ shutdown_client(sc, dss);
return;
- PARA_WARNING_LOG("%s\n", strerror(errno));
- shutdown_client(sc, dss);
-}
-
-static void dccp_send(long unsigned current_chunk,
- __a_unused long unsigned chunks_sent, const char *buf,
- size_t len, const char *header_buf, size_t header_len)
-{
- struct sender_client *sc, *tmp;
-
- list_for_each_entry_safe(sc, tmp, &dss->client_list, node)
- send_chunk(sc, dss, DCCP_MAX_BYTES_PER_WRITE, current_chunk, buf,
- len, header_buf, header_len);
-}
-
-static void dccp_shutdown_clients(void)
-{
- shutdown_clients(dss);
+ }
+ 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;
+ dfc->fcp.init_fec = dccp_init_fec;
+ dfc->fcp.send_fec = dccp_send_fec;
+ dfc->fcp.need_periodic_header = false;
+ dfc->fc = vss_add_fec_client(sc, &dfc->fcp);
}
static int dccp_com_on(__a_unused struct sender_command_data *scd)
static int dccp_com_off(__a_unused struct sender_command_data *scd)
{
+ dccp_shutdown_clients();
generic_com_off(dss);
return 1;
}
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;
}
/**
*/
void dccp_send_init(struct sender *s)
{
- int ret;
+ int ret, k, n;
- s->info = dccp_info;
- s->send = dccp_send;
+ 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;
+ 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,
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