client_common.c: Add a comment to client_connect().
[paraslash.git] / dccp_recv.c
index 755473c..c061860 100644 (file)
@@ -61,6 +61,13 @@ static int dccp_recv_open(struct receiver_node *rn)
 
        if (ret < 0)
                return 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(ret, SHUT_WR) < 0)
+               return -ERRNO_TO_PARA_ERROR(errno);
 
        rn->buf = para_calloc(DCCP_BUFSIZE);
        rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data));
@@ -99,9 +106,10 @@ static void dccp_recv_post_select(struct sched *s, struct task *t)
        struct receiver_node *rn = t->private_data;
        struct private_dccp_recv_data *pdd = rn->private_data;
 
-       t->ret = -E_DCCP_RECV_EOF;
-       if (rn->output_eof && *rn->output_eof)
+       if (rn->output_error && *rn->output_error) {
+               t->ret = *rn->output_error;
                goto out;
+       }
        t->ret = 1;
        if (!s->select_ret || !FD_ISSET(pdd->fd, &s->rfds))
                goto out; /* nothing to do */
@@ -112,14 +120,14 @@ static void dccp_recv_post_select(struct sched *s, struct task *t)
                DCCP_BUFSIZE - rn->loaded);
        if (t->ret <= 0) {
                if (!t->ret)
-                       t->ret = -E_DCCP_RECV_EOF;
+                       t->ret = -E_RECV_EOF;
                goto out;
        }
        rn->loaded += t->ret;
        return;
 out:
        if (t->ret < 0)
-               rn->eof = 1;
+               rn->error = t->ret;
 }
 
 /**