/*
- * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2008 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
{
struct private_dccp_recv_data *pdd;
struct dccp_recv_args_info *conf = rn->conf;
- int ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg, conf->port_arg);
+ int fd, ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg,
+ conf->port_arg);
if (ret < 0)
return ret;
-
+ fd = ret;
+ /*
+ * Disable unused CCIDs: the receiver does not send any application
+ * data to the server. By shutting down this unused path we reduce
+ * internal processing costs, as the unused CCIDs (in the kernel) are
+ * then bypassed.
+ */
+ if (shutdown(fd, SHUT_WR) < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
+ goto err;
+ }
+ ret = mark_fd_nonblocking(fd);
+ if (ret < 0)
+ goto err;
rn->buf = para_calloc(DCCP_BUFSIZE);
rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data));
-
- pdd->fd = ret;
- mark_fd_nonblocking(pdd->fd);
+ pdd->fd = fd;
return 1;
+err:
+ close(fd);
+ return ret;
}
static void dccp_shutdown(void)
static void dccp_recv_pre_select(struct sched *s, struct task *t)
{
- struct receiver_node *rn = t->private_data;
+ struct receiver_node *rn = container_of(t, struct receiver_node, task);
struct private_dccp_recv_data *pdd = rn->private_data;
- t->ret = 1;
+ t->error = 0;
para_fd_set(pdd->fd, &s->rfds, &s->max_fileno);
}
static void dccp_recv_post_select(struct sched *s, struct task *t)
{
- struct receiver_node *rn = t->private_data;
+ struct receiver_node *rn = container_of(t, struct receiver_node, task);
struct private_dccp_recv_data *pdd = rn->private_data;
- t->ret = -E_DCCP_RECV_EOF;
- if (rn->output_eof && *rn->output_eof)
- goto out;
- t->ret = 1;
- if (!s->select_ret || !FD_ISSET(pdd->fd, &s->rfds))
- goto out; /* nothing to do */
- t->ret = -E_DCCP_OVERRUN;
- if (rn->loaded >= DCCP_BUFSIZE)
- goto out;
- t->ret = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded,
+ if (rn->output_error && *rn->output_error < 0) {
+ t->error = *rn->output_error;
+ return;
+ }
+ if (!FD_ISSET(pdd->fd, &s->rfds))
+ return; /* nothing to do */
+ if (rn->loaded >= DCCP_BUFSIZE) {
+ t->error = -E_DCCP_OVERRUN;
+ return;
+ }
+ t->error = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded,
DCCP_BUFSIZE - rn->loaded);
- if (t->ret <= 0) {
- if (!t->ret)
- t->ret = -E_DCCP_RECV_EOF;
- goto out;
+ if (t->error > 0) {
+ rn->loaded += t->error;
+ return;
}
- rn->loaded += t->ret;
- return;
-out:
- if (t->ret < 0)
- rn->eof = 1;
+ if (!t->error)
+ t->error = -E_RECV_EOF;
}
/**
- * the init function of the dccp receiver
+ * The init function of the dccp receiver.
*
- * \param r pointer to the receiver struct to initialize
+ * \param r Pointer to the receiver struct to initialize.
*
- * Initialize all function pointers of \a r
+ * Initialize all function pointers of \a r.
*/
void dccp_recv_init(struct receiver *r)
{