From 0118e83ba4e1811515dc944a826758cad8a394b7 Mon Sep 17 00:00:00 2001 From: Codrin Ciubotariu Date: Wed, 9 Sep 2015 18:00:51 +0300 Subject: [PATCH] common/env_flags.c: Add function to validate a MAC address The code that checks if a string has the format of a MAC address has been moved to a separate function called eth_validate_ethaddr_str(). This has been done to allow other components (such as vsc9953 driver) to validate a MAC address. Signed-off-by: Codrin Ciubotariu Acked-by: Joe Hershberger Reviewed-by: York Sun --- common/env_flags.c | 40 +++++++++++++++++++++++++++------------- include/env_flags.h | 7 +++++++ 2 files changed, 34 insertions(+), 13 deletions(-) diff --git a/common/env_flags.c b/common/env_flags.c index 5189f5b2dd..e682d85178 100644 --- a/common/env_flags.c +++ b/common/env_flags.c @@ -187,6 +187,31 @@ static void skip_num(int hex, const char *value, const char **end, *end = value; } +#ifdef CONFIG_CMD_NET +int eth_validate_ethaddr_str(const char *addr) +{ + const char *end; + const char *cur; + int i; + + cur = addr; + for (i = 0; i < 6; i++) { + skip_num(1, cur, &end, 2); + if (cur == end) + return -1; + if (cur + 2 == end && is_hex_prefix(cur)) + return -1; + if (i != 5 && *end != ':') + return -1; + if (i == 5 && *end != '\0') + return -1; + cur = end + 1; + } + + return 0; +} +#endif + /* * Based on the declared type enum, validate that the value string complies * with that format @@ -239,19 +264,8 @@ static int _env_flags_validate_type(const char *value, } break; case env_flags_vartype_macaddr: - cur = value; - for (i = 0; i < 6; i++) { - skip_num(1, cur, &end, 2); - if (cur == end) - return -1; - if (cur + 2 == end && is_hex_prefix(cur)) - return -1; - if (i != 5 && *end != ':') - return -1; - if (i == 5 && *end != '\0') - return -1; - cur = end + 1; - } + if (eth_validate_ethaddr_str(value)) + return -1; break; #endif case env_flags_vartype_end: diff --git a/include/env_flags.h b/include/env_flags.h index 2d2de88fc0..8823fb9602 100644 --- a/include/env_flags.h +++ b/include/env_flags.h @@ -109,6 +109,13 @@ enum env_flags_varaccess env_flags_parse_varaccess(const char *flags); */ enum env_flags_varaccess env_flags_parse_varaccess_from_binflags(int binflags); +#ifdef CONFIG_CMD_NET +/* + * Check if a string has the format of an Ethernet MAC address + */ +int eth_validate_ethaddr_str(const char *addr); +#endif + #ifdef USE_HOSTCC /* * Look up the type of a variable directly from the .flags var. -- 2.39.5