This module sets the netfilter mark value associated with a connection. The

mark is 32 bits wide.

.TP

\fB\-\-set\-xmark\fP \fIvalue\fP[\fB/\fP\fImask\fP]

Zero out the bits given by \fImask\fP and XOR \fIvalue\fP into the ctmark.

.TP

\fB\-\-save\-mark\fP [\fB\-\-nfmask\fP \fInfmask\fP] [\fB\-\-ctmask\fP \fIctmask\fP]

Copy the packet mark (nfmark) to the connection mark (ctmark) using the given

masks. The new nfmark value is determined as follows:

.IP

ctmark = (ctmark & ~ctmask) ^ (nfmark & nfmask)

.IP

i.e. \fIctmask\fP defines what bits to clear and \fInfmask\fP what bits of the

nfmark to XOR into the ctmark. \fIctmask\fP and \fInfmask\fP default to

0xFFFFFFFF.

.TP

\fB\-\-restore\-mark\fP [\fB\-\-nfmask\fP \fInfmask\fP] [\fB\-\-ctmask\fP \fIctmask\fP]

Copy the connection mark (ctmark) to the packet mark (nfmark) using the given

masks. The new ctmark value is determined as follows:

.IP

nfmark = (nfmark & ~\fInfmask\fP) ^ (ctmark & \fIctmask\fP);

.IP

i.e. \fInfmask\fP defines what bits to clear and \fIctmask\fP what bits of the

ctmark to XOR into the nfmark. \fIctmask\fP and \fInfmask\fP default to

0xFFFFFFFF.

.IP

\fB\-\-restore\-mark\fP is only valid in the \fBmangle\fP table.

.PP

The following mnemonics are available for \fB\-\-set\-xmark\fP:

.TP

\fB\-\-and\-mark\fP \fIbits\fP

Binary AND the ctmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark

0/\fP\fIinvbits\fP, where \fIinvbits\fP is the binary negation of \fIbits\fP.)

.TP

\fB\-\-or\-mark\fP \fIbits\fP

Binary OR the ctmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark\fP

\fIbits\fP\fB/\fP\fIbits\fP.)

.TP

\fB\-\-xor\-mark\fP \fIbits\fP

Binary XOR the ctmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark\fP

\fIbits\fP\fB/0\fP.)

.TP

\fB\-\-set\-mark\fP \fIvalue\fP[\fB/\fP\fImask\fP]

Set the connection mark. If a mask is specified then only those bits set in the

mask are modified.

.TP

\fB\-\-save\-mark\fP [\fB\-\-mask\fP \fImask\fP]

Copy the nfmark to the ctmark. If a mask is specified, only those bits are

copied.

.TP

\fB\-\-restore\-mark\fP [\fB\-\-mask\fP \fImask\fP]

Copy the ctmark to the nfmark. If a mask is specified, only those bits are

copied. This is only valid in the \fBmangle\fP table.