1 files changed, 107 insertions, 0 deletions
diff --git a/roms/u-boot/lib/net_utils.c b/roms/u-boot/lib/net_utils.c
new file mode 100644
index 000000000..0a8a55731
--- /dev/null
+++ b/roms/u-boot/lib/net_utils.c
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Generic network code. Moved from net.c
+ *
+ * Copyright 1994 - 2000 Neil Russell.
+ * Copyright 2000 Roland Borde
+ * Copyright 2000 Paolo Scaffardi
+ * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
+ * Copyright 2009 Dirk Behme, dirk.behme@googlemail.com
+ */
+
+#include <common.h>
+#include <net.h>
+
+struct in_addr string_to_ip(const char *s)
+{
+	struct in_addr addr;
+	char *e;
+	int i;
+
+	addr.s_addr = 0;
+	if (s == NULL)
+		return addr;
+
+	for (addr.s_addr = 0, i = 0; i < 4; ++i) {
+		ulong val = s ? simple_strtoul(s, &e, 10) : 0;
+		if (val > 255) {
+			addr.s_addr = 0;
+			return addr;
+		}
+		if (i != 3 && *e != '.') {
+			addr.s_addr = 0;
+			return addr;
+		}
+		addr.s_addr <<= 8;
+		addr.s_addr |= (val & 0xFF);
+		if (s) {
+			s = (*e) ? e+1 : e;
+		}
+	}
+
+	addr.s_addr = htonl(addr.s_addr);
+	return addr;
+}
+
+void string_to_enetaddr(const char *addr, uint8_t *enetaddr)
+{
+	char *end;
+	int i;
+
+	if (!enetaddr)
+		return;
+
+	for (i = 0; i < 6; ++i) {
+		enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
+		if (addr)
+			addr = (*end) ? end + 1 : end;
+	}
+}
+
+uint compute_ip_checksum(const void *vptr, uint nbytes)
+{
+	int sum, oddbyte;
+	const unsigned short *ptr = vptr;
+
+	sum = 0;
+	while (nbytes > 1) {
+		sum += *ptr++;
+		nbytes -= 2;
+	}
+	if (nbytes == 1) {
+		oddbyte = 0;
+		((u8 *)&oddbyte)[0] = *(u8 *)ptr;
+		((u8 *)&oddbyte)[1] = 0;
+		sum += oddbyte;
+	}
+	sum = (sum >> 16) + (sum & 0xffff);
+	sum += (sum >> 16);
+	sum = ~sum & 0xffff;
+
+	return sum;
+}
+
+uint add_ip_checksums(uint offset, uint sum, uint new)
+{
+	ulong checksum;
+
+	sum = ~sum & 0xffff;
+	new = ~new & 0xffff;
+	if (offset & 1) {
+		/*
+		 * byte-swap the sum if it came from an odd offset; since the
+		 * computation is endian-independent this works.
+		 */
+		new = ((new >> 8) & 0xff) | ((new << 8) & 0xff00);
+	}
+	checksum = sum + new;
+	if (checksum > 0xffff)
+		checksum -= 0xffff;
+
+	return (~checksum) & 0xffff;
+}
+
+int ip_checksum_ok(const void *addr, uint nbytes)
+{
+	return !(compute_ip_checksum(addr, nbytes) & 0xfffe);
+}