1 files changed, 53 insertions, 0 deletions
diff --git a/usr/src/lib/varpd/svp/common/libvarpd_svp_crc.c b/usr/src/lib/varpd/svp/common/libvarpd_svp_crc.c
new file mode 100644
index 0000000000..ade47ff998
--- /dev/null
+++ b/usr/src/lib/varpd/svp/common/libvarpd_svp_crc.c
@@ -0,0 +1,53 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright 2015, Joyent, Inc.
+ */
+
+/*
+ * Perform standard crc32 functions.
+ *
+ * For more information, see the big theory statement in
+ * lib/varpd/svp/common/libvarpd_svp.c.
+ *
+ * Really, this should just be a libcrc.
+ */
+
+#include <sys/crc32.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <inttypes.h>
+#include <libvarpd_svp.h>
+
+static uint32_t svp_crc32_tab[] = { CRC32_TABLE };
+
+static uint32_t
+svp_crc32(uint32_t old, const uint8_t *buf, size_t len)
+{
+	uint32_t out;
+
+	CRC32(out, buf, len, old, svp_crc32_tab);
+	return (out);
+}
+
+void
+svp_query_crc32(svp_req_t *shp, void *buf, size_t data)
+{
+	uint32_t crc = -1U;
+
+	shp->svp_crc32 = 0;
+	crc = svp_crc32(crc, (uint8_t *)shp, sizeof (svp_req_t));
+	crc = svp_crc32(crc, buf, data);
+	crc = ~crc;
+	shp->svp_crc32 = htonl(crc);
+}