TCP profile: ack_zero and urp_zero shall not depend on ACK and URG flags.
TCP profile: ack_zero and urp_zero shall not depend on ACK and URG flags.

Always check for the ACK number (resp. URG pointer) value even if the ACK flag
(resp. URG flag) is not set in the uncompressed TCP header, this is important
to transmit all packets without any change, even if those bits will be ignored
at reception.

Found with the ROHC sniffer on miscellaneous web traffic.

didier-barvaux/rohc,didier-barvaux/rohc,didier-barvaux/rohc,didier-barvaux/rohc,didier-barvaux/rohc