+// SPDX-License-Identifier: GPL-2.0+
/*
* Generic network code. Moved from net.c
*
* Copyright 2000 Paolo Scaffardi
* Copyright 2000-2002 Wolfgang Denk, wd@denx.de
* Copyright 2009 Dirk Behme, dirk.behme@googlemail.com
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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; either version 2 of
- * the License, or (at your option) any later version.
- *
- * 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
*/
#include <common.h>
-IPaddr_t string_to_ip(const char *s)
+struct in_addr string_to_ip(const char *s)
{
- IPaddr_t addr;
+ struct in_addr addr;
char *e;
int i;
+ addr.s_addr = 0;
if (s == NULL)
- return(0);
+ return addr;
- for (addr=0, i=0; i<4; ++i) {
+ for (addr.s_addr = 0, i = 0; i < 4; ++i) {
ulong val = s ? simple_strtoul(s, &e, 10) : 0;
- addr <<= 8;
- addr |= (val & 0xFF);
+ 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;
}
}
- return (htonl(addr));
+ 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);
}