- size_t size, written = 0;
- int ret, retries = 0;
-again:
- size = PARA_MIN(1024, len - written);
- ret = write(fd, buf + written, size);
+ size_t written = 0;
+ int ret = 0;
+
+ while (written < len) {
+ ret = write(fd, buf + written, PARA_MIN(1024, len - written));
+ /*
+ * Error handling: CCID3 has a sending wait queue which fills up and is
+ * emptied asynchronously. The EAGAIN case means that there is currently
+ * no space in the wait queue, but this can change at any moment and is
+ * thus not an error condition.
+ */
+ if (ret < 0 && errno == EAGAIN)
+ return written;
+ if (ret < 0) {
+ PARA_ERROR_LOG("%s\n", strerror(errno));
+ return -E_DCCP_WRITE;
+ }
+ written += ret;
+ }
+ return written;
+}
+
+static int queue_chunk_or_shutdown(struct dccp_client *dc, long unsigned chunk_num,
+ size_t sent)
+{
+ int ret = cq_enqueue(dc->cq, chunk_num, sent);