renamed capwap directory to cw.

FossilOrigin-Name: 8a43dd9d05a4cb73210243ddd8df2a26f16c7ef2c4d4e36ab446de1f65d88223

src/cw/dtls_bio.c

@@ -0,0 +1,92 @@
+/*
+    This file is part of libcapwap.
+
+    libcapwap is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    libcapwap is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+/**
+ * @file
+ * @brief Implements DTLS BIO read/write functions.
+ */
+
+
+#include <arpa/inet.h>
+
+#include "log.h"
+#include "dbg.h"
+#include "dtls.h"
+
+
+/**
+ * Reads CAPWAP DTLS data from a connection object.
+ * @param conn conn object
+ * @param out where to write data to
+ * @param maxlen maximum number of bytes to read
+ * @return the number of bytes read
+ */ 
+int dtls_bio_read(struct conn *conn, char *out, int maxlen)
+{
+	if (conn->dtls_buffer_len == 0) {
+		int len = conn->recv_packet(conn, conn->dtls_buffer, 2048);
+		if (len < 4)
+			return 0;
+		conn->dtls_buffer_len = len - 4;
+		conn->dtls_buffer_pos = 4;
+	}
+
+	if (conn->dtls_buffer_len > maxlen) {
+		memcpy(out, conn->dtls_buffer + conn->dtls_buffer_pos, maxlen);
+		conn->dtls_buffer_len -= maxlen;
+		conn->dtls_buffer_pos += maxlen;
+		cw_dbg(DBG_DTLS_BIO, "SSL BIO read: (maxlen = %d), read %d, remain %d", maxlen,
+		       maxlen, conn->dtls_buffer_len);
+//		cw_dbg_dmp(DBG_DTLS_BIO_DMP, (uint8_t *) out, maxlen, "Dump...");
+
+		return maxlen;
+	}
+
+	memcpy(out, conn->dtls_buffer + conn->dtls_buffer_pos, conn->dtls_buffer_len);
+	int ret = conn->dtls_buffer_len;
+	conn->dtls_buffer_len = 0;
+	cw_dbg(DBG_DTLS_BIO, "SSL BIO read: (maxlen = %d), read %d, remain %d", maxlen, ret,
+	       conn->dtls_buffer_len);
+//	cw_dbg_dmp(DBG_DTLS_BIO_DMP, (uint8_t *) out, ret, "Dump...");
+	return ret;
+}
+
+/**
+ * Write DTLS data to a CAPWAP connection.
+ * @param conn the connection
+ * @param data data to write
+ * @param len number of bytes to write
+ * @return the number of bytes written
+ */
+int dtls_bio_write(struct conn *conn, const char *data, int len)
+{
+	uint8_t buffer[2048];
+	*((uint32_t *) buffer) = htonl(1 << 24);
+	memcpy(buffer + 4, data, len);
+	int rc = conn->send_packet(conn, buffer, len + 4);
+	if (rc>=0)
+		rc-=4;
+		
+
+	cw_dbg(DBG_DTLS_BIO, "SSL BIO write: %d bytes, wrote=%d, ptr: %p", len, rc, data);
+//	cw_dbg_dmp(DBG_DTLS_BIO_DMP, (uint8_t *) data, len, "Dump ...");
+
+	if (rc < 0)
+		return rc;
+	return rc ;
+}