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54 lines
2.1 KiB
54 lines
2.1 KiB
4 months ago
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This module sets the netfilter mark value associated with a connection. The
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mark is 32 bits wide.
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.TP
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\fB\-\-set\-xmark\fP \fIvalue\fP[\fB/\fP\fImask\fP]
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Zero out the bits given by \fImask\fP and XOR \fIvalue\fP into the ctmark.
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.TP
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\fB\-\-save\-mark\fP [\fB\-\-nfmask\fP \fInfmask\fP] [\fB\-\-ctmask\fP \fIctmask\fP]
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Copy the packet mark (nfmark) to the connection mark (ctmark) using the given
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masks. The new nfmark value is determined as follows:
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.IP
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ctmark = (ctmark & ~ctmask) ^ (nfmark & nfmask)
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.IP
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i.e. \fIctmask\fP defines what bits to clear and \fInfmask\fP what bits of the
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nfmark to XOR into the ctmark. \fIctmask\fP and \fInfmask\fP default to
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0xFFFFFFFF.
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.TP
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\fB\-\-restore\-mark\fP [\fB\-\-nfmask\fP \fInfmask\fP] [\fB\-\-ctmask\fP \fIctmask\fP]
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Copy the connection mark (ctmark) to the packet mark (nfmark) using the given
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masks. The new ctmark value is determined as follows:
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.IP
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nfmark = (nfmark & ~\fInfmask\fP) ^ (ctmark & \fIctmask\fP);
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.IP
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i.e. \fInfmask\fP defines what bits to clear and \fIctmask\fP what bits of the
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ctmark to XOR into the nfmark. \fIctmask\fP and \fInfmask\fP default to
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0xFFFFFFFF.
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.IP
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\fB\-\-restore\-mark\fP is only valid in the \fBmangle\fP table.
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.PP
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The following mnemonics are available for \fB\-\-set\-xmark\fP:
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.TP
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\fB\-\-and\-mark\fP \fIbits\fP
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Binary AND the ctmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark
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0/\fP\fIinvbits\fP, where \fIinvbits\fP is the binary negation of \fIbits\fP.)
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.TP
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\fB\-\-or\-mark\fP \fIbits\fP
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Binary OR the ctmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark\fP
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\fIbits\fP\fB/\fP\fIbits\fP.)
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.TP
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\fB\-\-xor\-mark\fP \fIbits\fP
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Binary XOR the ctmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark\fP
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\fIbits\fP\fB/0\fP.)
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.TP
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\fB\-\-set\-mark\fP \fIvalue\fP[\fB/\fP\fImask\fP]
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Set the connection mark. If a mask is specified then only those bits set in the
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mask are modified.
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.TP
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\fB\-\-save\-mark\fP [\fB\-\-mask\fP \fImask\fP]
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Copy the nfmark to the ctmark. If a mask is specified, only those bits are
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copied.
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.TP
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\fB\-\-restore\-mark\fP [\fB\-\-mask\fP \fImask\fP]
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Copy the ctmark to the nfmark. If a mask is specified, only those bits are
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copied. This is only valid in the \fBmangle\fP table.
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