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| author | Denys Vlasenko | 2018-08-01 13:36:36 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2018-08-01 13:36:36 +0200 |
| commit | 02cf149ed71b17326bdca69fcae8224d043fc7bb (patch) | |
| tree | d65da719796803588b19decc1cd3d87f50cb98e1 /networking | |
| parent | 48ec979ed1b3eb1441363240915ef0b9a91c545d (diff) | |
| download | busybox-02cf149ed71b17326bdca69fcae8224d043fc7bb.zip busybox-02cf149ed71b17326bdca69fcae8224d043fc7bb.tar.gz | |
udhcpc: add a cooment about sanitizing DHCP_DOMAIN_NAME, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/udhcp/dhcpc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c index 3afdb35..0310663 100644 --- a/networking/udhcp/dhcpc.c +++ b/networking/udhcp/dhcpc.c @@ -274,6 +274,12 @@ static NOINLINE char *xmalloc_optname_optval(uint8_t *option, const struct dhcp_ case OPTION_STRING_HOST: memcpy(dest, option, len); dest[len] = '\0'; +//TODO: it appears option 15 DHCP_DOMAIN_NAME is often abused +//by DHCP admins to contain a space-separated list of domains, +//not one domain name (presumably, to work as list of search domains, +//instead of using proper option 119 DHCP_DOMAIN_SEARCH). +//Currently, good_hostname() balks on strings containing spaces. +//Do we need to allow it? Only for DHCP_DOMAIN_NAME option? if (type == OPTION_STRING_HOST && !good_hostname(dest)) safe_strncpy(dest, "bad", len); return ret; |