[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/bsp/lk/lib/minip/chksum.c b/src/bsp/lk/lib/minip/chksum.c
new file mode 100644
index 0000000..68f4dcb
--- /dev/null
+++ b/src/bsp/lk/lib/minip/chksum.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2014 Chris Anderson
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "minip-internal.h"
+
+/* XXX alternate implementation, merge */
+uint16_t ones_sum16(uint32_t sum, const void *_buf, int len)
+{
+ const uint16_t *buf = _buf;
+
+ while (len >= 2) {
+ sum += *buf++;
+ if(sum & 0x80000000)
+ sum = (sum & 0xffff) + (sum >> 16);
+ len -= 2;
+ }
+
+ if (len) {
+ uint16_t temp = htons((*(uint8_t *)buf) << 8);
+ sum += temp;
+ }
+
+ while (sum >> 16)
+ sum = (sum & 0xffff) + (sum >> 16);
+
+ return sum;
+}
+
+uint16_t rfc1701_chksum(const uint8_t *buf, size_t len)
+{
+ uint32_t total = 0;
+ uint16_t chksum = 0;
+ const uint16_t *p = (const uint16_t *) buf;
+
+ // Length is in bytes
+ for (size_t i = 0; i < len / 2; i++ ) {
+ total += p[i];
+ }
+
+ chksum = (total & 0xFFFF) + (total >> 16);
+ chksum = ~chksum;
+
+ return chksum;
+}
+
+#if MINIP_USE_UDP_CHECKSUM
+uint16_t rfc768_chksum(struct ipv4_hdr *ipv4, struct udp_hdr *udp)
+{
+ uint32_t total = 0;
+ uint16_t chksum = 0;
+ size_t len = ntohs(udp->len);
+ uint16_t *p;
+
+ p = (uint16_t *)ipv4->src_addr;
+ total += htons(p[0]);
+ total += htons(p[1]);
+
+ p = (uint16_t *)ipv4->dst_addr;
+ total += htons(p[0]);
+ total += htons(p[1]);
+
+ p = (const uint16_t *)udp->data;
+ for (size_t i = 0; i < len / 2; i++ ) {
+ total += p[i];
+ }
+
+ total += IP_PROTO_UDP;
+ total += udp->len;
+ total += udp->src_port;
+ total += udp->dst_port;
+ total += ipv4->len;
+
+ chksum = (total & 0xFFFF) + (total >> 16);
+ chksum = ~chksum;
+
+ return chksum;
+}
+#endif
+
+// vim: set ts=4 sw=4 expandtab: