dhcp6: Sanitize DHCPv6 IA option parsing

Sanitize code for parsing DHCPv6 IA NA and TA options and their
nested Status options so that the options can be fully and
properly ignored should they not be conformant to the specification.

Do this by defining a proper DHCP6Option structure and sending that
structure to the parsing function. The parsing function will then
not manipulate either any option data pointers or their lengths in
order to iterate over the current option. Needless to say, this
affects a few files including the test program.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/libsystemd-network/dhcp6-protocol.h b/src/libsystemd-network/dhcp6-protocol.h
index 7bbf183996..5f7e809ba1 100644
--- a/src/libsystemd-network/dhcp6-protocol.h
+++ b/src/libsystemd-network/dhcp6-protocol.h
@@ -34,6 +34,7 @@ struct DHCP6Message {
                 } _packed_;
                 be32_t transaction_id;
         };
+        uint8_t options[];
 } _packed_;
 
 typedef struct DHCP6Message DHCP6Message;