+struct fxp_xfer *xfer_upload_init(struct fxp_handle *fh, uint64 offset)
+{
+ struct fxp_xfer *xfer = xfer_init(fh, offset);
+
+ /*
+ * We set `eof' to 1 because this will cause xfer_done() to
+ * return true iff there are no outstanding requests. During an
+ * upload, our caller will be responsible for working out
+ * whether all the data has been sent, so all it needs to know
+ * from us is whether the outstanding requests have been
+ * handled once that's done.
+ */
+ xfer->eof = 1;
+
+ return xfer;
+}
+
+int xfer_upload_ready(struct fxp_xfer *xfer)
+{
+ if (xfer->req_totalsize < xfer->req_maxsize)
+ return 1;
+ else
+ return 0;
+}
+
+void xfer_upload_data(struct fxp_xfer *xfer, char *buffer, int len)
+{
+ struct req *rr;
+ struct sftp_request *req;
+
+ rr = snew(struct req);
+ rr->offset = xfer->offset;
+ rr->complete = 0;
+ if (xfer->tail) {
+ xfer->tail->next = rr;
+ rr->prev = xfer->tail;
+ } else {
+ xfer->head = rr;
+ rr->prev = NULL;
+ }
+ xfer->tail = rr;
+ rr->next = NULL;
+
+ rr->len = len;
+ rr->buffer = NULL;
+ sftp_register(req = fxp_write_send(xfer->fh, buffer, rr->offset, len));
+ fxp_set_userdata(req, rr);
+
+ xfer->offset = uint64_add32(xfer->offset, rr->len);
+ xfer->req_totalsize += rr->len;
+
+#ifdef DEBUG_UPLOAD
+ { char buf[40]; uint64_decimal(rr->offset, buf); printf("queueing write request %p at %s [len %d]\n", rr, buf, len); }
+#endif
+}
+
+int xfer_upload_gotpkt(struct fxp_xfer *xfer, struct sftp_packet *pktin)
+{
+ struct sftp_request *rreq;
+ struct req *rr, *prev, *next;
+ int ret;
+
+ rreq = sftp_find_request(pktin);
+ rr = (struct req *)fxp_get_userdata(rreq);
+ if (!rr)
+ return 0; /* this packet isn't ours */
+ ret = fxp_write_recv(pktin, rreq);
+#ifdef DEBUG_UPLOAD
+ printf("write request %p has returned [%d]\n", rr, ret);
+#endif
+
+ /*
+ * Remove this one from the queue.
+ */
+ prev = rr->prev;
+ next = rr->next;
+ if (prev)
+ prev->next = next;
+ else
+ xfer->head = next;
+ if (next)
+ next->prev = prev;
+ else
+ xfer->tail = prev;
+ xfer->req_totalsize -= rr->len;
+ sfree(rr);
+
+ if (!ret)
+ return -1;
+
+ return 1;
+}
+