This patch adds a little tool that takes a generic MAC address and generates a CRC byte for it. The output is the full MAC address without any separators, ready written into an EEPROM.
Signed-off-by: Olliver Schinagl <[email protected]> --- tools/Makefile | 4 ++++ tools/gen_mac_addr.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 55 insertions(+) create mode 100644 tools/gen_mac_addr.c diff --git a/tools/Makefile b/tools/Makefile index 4a50744..6191c26 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -43,6 +43,10 @@ envcrc-objs := envcrc.o lib/crc32.o common/env_embedded.o lib/sha1.o hostprogs-$(CONFIG_CMD_NET) += gen_eth_addr HOSTCFLAGS_gen_eth_addr.o := -pedantic +hostprogs-$(CONFIG_CMD_NET) += gen_mac_addr +gen_mac_addr-objs := gen_mac_addr.o lib/crc8.o +HOSTCFLAGS_gen_mac_addr.o := -pedantic + hostprogs-$(CONFIG_CMD_LOADS) += img2srec HOSTCFLAGS_img2srec.o := -pedantic diff --git a/tools/gen_mac_addr.c b/tools/gen_mac_addr.c new file mode 100644 index 0000000..bd8688f --- /dev/null +++ b/tools/gen_mac_addr.c @@ -0,0 +1,51 @@ +/* + * (C) Copyright 2016 + * Olliver Schinagl <[email protected]> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <ctype.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <u-boot/crc.h> + + +int main(int argc, char *argv[]) +{ + uint_fast8_t i; + uint8_t mac_addr[7] = { 0x00 }; + + if (argc < 2) { + puts("Please supply a MAC address."); + return -1; + } + + if (!((strlen(argv[1]) == 12) || (strlen(argv[1]) == 17))) { + puts("Please supply a valid MAC address with optionaly\n" + "dashes (-) or colons (:) as seperators."); + return -1; + } + + i = 0; + while (*argv[1] != '\0') { + char nibble[2] = { 0x00, '\n' }; /* for strtol */ + + nibble[0] = *argv[1]++; + if (isxdigit(nibble[0])) { + if (isupper(nibble[0])) + nibble[0] = tolower(nibble[0]); + mac_addr[i >> 1] |= strtol(nibble, NULL, 16) << ((i % 2) ? 0 : 4) & ((i % 2) ? 0x0f : 0xf0); + i++; + } + } + mac_addr[6] = crc8(mac_addr, 6); + + for (i = 0; i < 7; i++) + printf("%.2x", mac_addr[i]); + putchar('\n'); + + return 0; +} -- 2.6.2 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
