From 6d3b4bb24da9a07c263f3c1acf8df85382ff562c Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Mon, 17 Dec 2018 18:07:18 +0100 Subject: udhcpc: check that 4-byte options are indeed 4-byte, closes 11506 function old new delta udhcp_get_option32 - 27 +27 udhcp_get_option 231 248 +17 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/0 up/down: 44/0) Total: 44 bytes Signed-off-by: Denys Vlasenko --- networking/udhcp/common.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'networking/udhcp/common.h') diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h index 7ad603d33..9511152ff 100644 --- a/networking/udhcp/common.h +++ b/networking/udhcp/common.h @@ -205,6 +205,10 @@ extern const uint8_t dhcp_option_lengths[] ALIGN1; unsigned FAST_FUNC udhcp_option_idx(const char *name, const char *option_strings); uint8_t *udhcp_get_option(struct dhcp_packet *packet, int code) FAST_FUNC; +/* Same as above + ensures that option length is 4 bytes + * (returns NULL if size is different) + */ +uint8_t *udhcp_get_option32(struct dhcp_packet *packet, int code) FAST_FUNC; int udhcp_end_option(uint8_t *optionptr) FAST_FUNC; void udhcp_add_binary_option(struct dhcp_packet *packet, uint8_t *addopt) FAST_FUNC; #if ENABLE_UDHCPC || ENABLE_UDHCPD -- cgit v1.2.3