From d721001fd6d4162738578ba03c94c1198a5ef462 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Fri, 6 Dec 2019 21:41:39 -0700 Subject: net: Move the checksum functions to lib/ These functions are used by code outside the network support, so move them to lib/ to be more accessible. Without this, the functions are only accessible in SPL/TPL only if CONFIG_SPL/TPL_NET are defined. Many boards do not enable those option but still want to do checksums in this format. Fix up a few code-style nits while we are here. Signed-off-by: Simon Glass Acked-by: Joe Hershberger Reviewed-by: Bin Meng --- net/Makefile | 1 - net/checksum.c | 59 ---------------------------------------------------------- 2 files changed, 60 deletions(-) delete mode 100644 net/checksum.c (limited to 'net') diff --git a/net/Makefile b/net/Makefile index 2a700c8401..fef71b940a 100644 --- a/net/Makefile +++ b/net/Makefile @@ -5,7 +5,6 @@ #ccflags-y += -DDEBUG -obj-y += checksum.o obj-$(CONFIG_NET) += arp.o obj-$(CONFIG_CMD_BOOTP) += bootp.o obj-$(CONFIG_CMD_CDP) += cdp.o diff --git a/net/checksum.c b/net/checksum.c deleted file mode 100644 index 16ef416356..0000000000 --- a/net/checksum.c +++ /dev/null @@ -1,59 +0,0 @@ -// SPDX-License-Identifier: BSD-2-Clause -/* - * This file was originally taken from the FreeBSD project. - * - * Copyright (c) 2001 Charles Mott - * Copyright (c) 2008 coresystems GmbH - * All rights reserved. - */ - -#include -#include - -unsigned compute_ip_checksum(const void *vptr, unsigned 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; -} - -unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new) -{ - unsigned long 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 independant 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, unsigned nbytes) -{ - return !(compute_ip_checksum(addr, nbytes) & 0xfffe); -} -- cgit