--- /dev/null
+/*
+ * ustream-ssl - library for SSL over ustream
+ *
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <string.h>
+
+#include <libubox/ustream.h>
+
+#include "ustream-ssl.h"
+#include "ustream-internal.h"
+
+/* not defined in the header file */
+typedef int (*CallbackIORecv)(char *buf, int sz, void *ctx);
+typedef int (*CallbackIOSend)(char *buf, int sz, void *ctx);
+
+void SetCallbackIORecv_Ctx(SSL_CTX*, CallbackIORecv);
+void SetCallbackIOSend_Ctx(SSL_CTX*, CallbackIOSend);
+void SetCallbackIO_ReadCtx(SSL* ssl, void *rctx);
+void SetCallbackIO_WriteCtx(SSL* ssl, void *wctx);
+
+static int s_ustream_read(char *buf, int len, void *ctx)
+{
+ struct ustream *s = ctx;
+ char *sbuf;
+ int slen;
+
+ if (s->eof)
+ return -3;
+
+ sbuf = ustream_get_read_buf(s, &slen);
+ if (slen > len)
+ slen = len;
+
+ if (!slen)
+ return -2;
+
+ memcpy(buf, sbuf, slen);
+ ustream_consume(s, slen);
+
+ return slen;
+}
+
+static int s_ustream_write(char *buf, int len, void *ctx)
+{
+ struct ustream *s = ctx;
+
+ return ustream_write(s, buf, len, false);
+}
+
+__hidden void ustream_set_io(void *ctx, void *ssl, struct ustream *conn)
+{
+ SetCallbackIO_ReadCtx(ssl, conn);
+ SetCallbackIO_WriteCtx(ssl, conn);
+ SetCallbackIORecv_Ctx(ctx, s_ustream_read);
+ SetCallbackIOSend_Ctx(ctx, s_ustream_write);
+}