diff options
| -rw-r--r-- | networking/udhcp/Config.src | 11 | ||||
| -rw-r--r-- | networking/udhcp/dhcpc.c | 4 |
2 files changed, 15 insertions, 0 deletions
diff --git a/networking/udhcp/Config.src b/networking/udhcp/Config.src index 6bfa398..c34c8d6 100644 --- a/networking/udhcp/Config.src +++ b/networking/udhcp/Config.src @@ -84,6 +84,17 @@ config FEATURE_UDHCPC_ARPING will DHCPDECLINE the offer if the address is in use, and restart the discover process. +config FEATURE_UDHCPC_SANITIZEOPT + bool "Do not pass malformed host and domain names" + default y + depends on UDHCPC + help + If selected, udhcpc will check some options (such as option 12 - + hostname) and if they don't look like valid hostnames + (for example, if they start with dash or contain spaces), + they will be replaced with string "bad" when exporting + to the environment. + config FEATURE_UDHCP_PORT bool "Enable '-P port' option for udhcpd and udhcpc" default n diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c index 7dfc160..e468b7b 100644 --- a/networking/udhcp/dhcpc.c +++ b/networking/udhcp/dhcpc.c @@ -136,6 +136,7 @@ static int mton(uint32_t mask) return i; } +#if ENABLE_FEATURE_UDHCPC_SANITIZEOPT /* Check if a given label represents a valid DNS label * Return pointer to the first character after the label upon success, * NULL otherwise. @@ -192,6 +193,9 @@ static int good_hostname(const char *name) name++; } } +#else +# define good_hostname(name) 1 +#endif /* Create "opt_name=opt_value" string */ static NOINLINE char *xmalloc_optname_optval(uint8_t *option, const struct dhcp_optflag *optflag, const char *opt_name) |