From: Hans Dedecker <dedeckeh@gmail.com>
Date: Fri, 11 Jan 2019 09:25:12 +0000 (+0100)
Subject: dhcpv6: avoid parsing unncessary IAs
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=ce83a23b16dadd567babf74b2f8164cfcd327a58;p=oweals%2Fodhcp6c.git

dhcpv6: avoid parsing unncessary IAs

Don't parse IA_NA/IA_PD options if either na_mode or pd_mode is set
to IA_MODE_NONE

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
---

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index 857cbe1..5378010 100644
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -862,7 +862,8 @@ static int dhcpv6_handle_advert(enum dhcpv6_msg orig, const int rc,
 
 	dhcpv6_for_each_option(opt, end, otype, olen, odata) {
 		if (orig == DHCPV6_MSG_SOLICIT &&
-				(otype == DHCPV6_OPT_IA_PD || otype == DHCPV6_OPT_IA_NA) &&
+				((otype == DHCPV6_OPT_IA_PD && pd_mode != IA_MODE_NONE) ||
+				 (otype == DHCPV6_OPT_IA_NA && na_mode != IA_MODE_NONE)) &&
 				olen > -4 + sizeof(struct dhcpv6_ia_hdr)) {
 			struct dhcpv6_ia_hdr *ia_hdr = (void*)(&odata[-4]);
 			dhcpv6_parse_ia(ia_hdr, odata + olen + sizeof(*ia_hdr));