split cyassl and openssl sources, add ssl library abstraction

[project/ustream-ssl.git] / ustream-io-cyassl.c

diff --git a/ustream-io-cyassl.c b/ustream-io-cyassl.c
new file mode 100644 (file)
index 0000000..1787cd0
--- /dev/null
+++ b/ustream-io-cyassl.c
@@ -0,0 +1,70 @@
+/*
+ * 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);
+}