mir/isc-dhcp
2
0
Fork 0
mirror of https://gitlab.isc.org/isc-projects/dhcp synced 2025-08-31 06:15:55 +00:00
Code Issues Releases Wiki Activity

Use offsetof() instead of sizeof() to get the sizes for dhcpv6_relay_packet

Browse Source 
and dhcpv6_packet in several more places.  Thanks to a report from
Bruno Verstuyft and Vincent Demaertelaere of Excentis.
[ISC-Bugs #27941]
This commit is contained in:
Shawn Routhier
2012-03-20 00:31:34 +00:00
parent d13db163c7
commit b342f2e77c
3 changed files with 13 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
common/options.c
View File

@@ -3845,6 +3845,7 @@ do_packet6(struct interface_info *interface, const char *packet,
msg_type = packet[0];
if ((msg_type == DHCPV6_RELAY_FORW) ||
(msg_type == DHCPV6_RELAY_REPL)) {
int relaylen = (int)(offsetof(struct dhcpv6_relay_packet, options));
relay = (const struct dhcpv6_relay_packet *)packet;
decoded_packet->dhcpv6_msg_type = relay->msg_type;
@@ -3856,7 +3857,7 @@ do_packet6(struct interface_info *interface, const char *packet,
relay->peer_address, sizeof(relay->peer_address));
if (!parse_option_buffer(decoded_packet->options,
relay->options, len-sizeof(*relay),
relay->options, len - relaylen,
&dhcpv6_universe)) {
/* no logging here, as parse_option_buffer() logs all
cases where it fails */
@@ -3864,6 +3865,7 @@ do_packet6(struct interface_info *interface, const char *packet,
return;
}
} else {
int msglen = (int)(offsetof(struct dhcpv6_packet, options));
msg = (const struct dhcpv6_packet *)packet;
decoded_packet->dhcpv6_msg_type = msg->msg_type;
@@ -3873,7 +3875,7 @@ do_packet6(struct interface_info *interface, const char *packet,
sizeof(decoded_packet->dhcpv6_transaction_id));
if (!parse_option_buffer(decoded_packet->options,
msg->options, len-sizeof(*msg),
msg->options, len - msglen,
&dhcpv6_universe)) {
/* no logging here, as parse_option_buffer() logs all
cases where it fails */