Add qemu 2.4.0

[kvmfornfv.git] / qemu / include / net / checksum.h

diff --git a/qemu/include/net/checksum.h b/qemu/include/net/checksum.h
new file mode 100644 (file)
index 0000000..2d7a363
--- /dev/null
+++ b/qemu/include/net/checksum.h
@@ -0,0 +1,54 @@
+/*
+ *  IP checksumming functions.
+ *  (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
+ *
+ *  This program 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; under version 2 of the License.
+ *
+ *  This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef QEMU_NET_CHECKSUM_H
+#define QEMU_NET_CHECKSUM_H
+
+#include <stdint.h>
+struct iovec;
+
+uint32_t net_checksum_add_cont(int len, uint8_t *buf, int seq);
+uint16_t net_checksum_finish(uint32_t sum);
+uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto,
+                             uint8_t *addrs, uint8_t *buf);
+void net_checksum_calculate(uint8_t *data, int length);
+
+static inline uint32_t
+net_checksum_add(int len, uint8_t *buf)
+{
+    return net_checksum_add_cont(len, buf, 0);
+}
+
+static inline uint16_t
+net_raw_checksum(uint8_t *data, int length)
+{
+    return net_checksum_finish(net_checksum_add(length, data));
+}
+
+/**
+ * net_checksum_add_iov: scatter-gather vector checksumming
+ *
+ * @iov: input scatter-gather array
+ * @iov_cnt: number of array elements
+ * @iov_off: starting iov offset for checksumming
+ * @size: length of data to be checksummed
+ */
+uint32_t net_checksum_add_iov(const struct iovec *iov,
+                              const unsigned int iov_cnt,
+                              uint32_t iov_off, uint32_t size);
+
+#endif /* QEMU_NET_CHECKSUM_H */