1 files changed, 115 insertions, 0 deletions
diff --git a/lib/libatm/cache_key.c b/lib/libatm/cache_key.c
new file mode 100644
index 0000000..f0d6650
--- /dev/null
+++ b/lib/libatm/cache_key.c
@@ -0,0 +1,115 @@
+/*
+ *
+ * ===================================
+ * HARP  |  Host ATM Research Platform
+ * ===================================
+ *
+ *
+ * This Host ATM Research Platform ("HARP") file (the "Software") is
+ * made available by Network Computing Services, Inc. ("NetworkCS")
+ * "AS IS".  NetworkCS does not provide maintenance, improvements or
+ * support of any kind.
+ *
+ * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
+ * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
+ * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
+ * In no event shall NetworkCS be responsible for any damages, including
+ * but not limited to consequential damages, arising from or relating to
+ * any use of the Software or related support.
+ *
+ * Copyright 1994-1998 Network Computing Services, Inc.
+ *
+ * Copies of this Software may be made, however, the above copyright
+ * notice must be reproduced on all copies.
+ *
+ *	@(#) $Id: cache_key.c,v 1.1 1998/07/09 21:45:27 johnc Exp $
+ *
+ */
+
+
+/*
+ * User Space Library Functions
+ * ----------------------------
+ *
+ * SCSP cache key computation
+ *
+ */
+
+
+#ifndef lint
+static char *RCSid = "@(#) $Id: cache_key.c,v 1.1 1998/07/09 21:45:27 johnc Exp $";
+#endif
+
+#include <sys/types.h>
+#include <sys/param.h>
+
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netatm/port.h>
+#include <netatm/atm.h>
+#include <netatm/atm_if.h>
+#include <netatm/atm_sap.h>
+#include <netatm/atm_sys.h>
+#include <netatm/atm_ioctl.h>
+
+#include <md5.h>
+#include "libatm.h"
+
+
+/*
+ * Compute an SCSP cache key
+ *
+ * Arguments:
+ *	ap	pointer to an Atm_addr with the ATM address
+ *	ip	pointer to a struct in_addr with the IP address
+ *	ol	the required length of the cache key
+ *	op	pointer to receive cache key
+ *
+ * Returns:
+ *	none
+ *
+ */
+void
+scsp_cache_key(ap, ip, ol, op)
+	Atm_addr	*ap;
+	struct in_addr	*ip;
+	int		ol;
+	char 		*op;
+{
+	int	i, key, len;
+	char	*cp;
+	char	buff[32], digest[16];
+	MD5_CTX	context;
+
+	/*
+	 * Initialize
+	 */
+	UM_ZERO(buff, sizeof(buff));
+
+	/*
+	 * Copy the addresses into a buffer for MD5 computation
+	 */
+	len = sizeof(struct in_addr) + ap->address_length;
+	if (len > sizeof(buff))
+		len = sizeof(buff);
+	UM_COPY(ip, buff, sizeof(struct in_addr));
+	UM_COPY(ap->address, &buff[sizeof(struct in_addr)],
+			len - sizeof(struct in_addr));
+
+	/*
+	 * Compute the MD5 digest of the combined IP and ATM addresses
+	 */
+	MD5Init(&context);
+	MD5Update(&context, buff, len);
+	MD5Final(digest, &context);
+
+	/*
+	 * Fold the 16-byte digest to the required length
+	 */
+	UM_ZERO((caddr_t)op, ol);
+	for (i = 0; i < 16; i++) {
+		op[i % ol] = op[i % ol] ^ digest[i];
+	}
+}