#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 {
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 int dccp_send_fec(struct sender_client *sc, char *buf, size_t len)
{
- int ret = write_nonblock(sc->fd, buf, len, DCCP_MAX_BYTES_PER_WRITE);
+ int ret = write_nonblock(sc->fd, buf, len);
if (ret < 0)
dccp_shutdown_client(sc);
}
dfc = para_calloc(sizeof(*dfc));
sc->private_data = dfc;
- dfc->fcp.slices_per_group = 4;
- dfc->fcp.data_slices_per_group = 3;
- dfc->fcp.max_slice_bytes = DCCP_MAX_BYTES_PER_WRITE; /* FIXME */
- dfc->fcp.init_fec = NULL; /* FIXME */
+ 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->fc = vss_add_fec_client(sc, &dfc->fcp);
}
*/
void dccp_send_init(struct sender *s)
{
- int ret;
+ 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_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);