This module matches the parameters in IPcomp header of IPsec packets.
.TP
[\fB!\fP] \fB\-\-ipcompspi\fP \fIspi\fP[\fB:\fP\fIspi\fP]
Matches IPcomp header CPI value.
.TP
\fB\-\-compres\fP
Matches if the reserved field is filled with zero.