xref: /aosp_15_r20/external/iptables/extensions/libxt_CONNMARK.man (revision a71a954618bbadd4a345637e5edcf36eec826889)
1*a71a9546SAutomerger Merge WorkerThis module sets the netfilter mark value associated with a connection. The
2*a71a9546SAutomerger Merge Workermark is 32 bits wide.
3*a71a9546SAutomerger Merge Worker.TP
4*a71a9546SAutomerger Merge Worker\fB\-\-set\-xmark\fP \fIvalue\fP[\fB/\fP\fImask\fP]
5*a71a9546SAutomerger Merge WorkerZero out the bits given by \fImask\fP and XOR \fIvalue\fP into the ctmark.
6*a71a9546SAutomerger Merge Worker.TP
7*a71a9546SAutomerger Merge Worker\fB\-\-save\-mark\fP [\fB\-\-nfmask\fP \fInfmask\fP] [\fB\-\-ctmask\fP \fIctmask\fP]
8*a71a9546SAutomerger Merge WorkerCopy the packet mark (nfmark) to the connection mark (ctmark) using the given
9*a71a9546SAutomerger Merge Workermasks. The new nfmark value is determined as follows:
10*a71a9546SAutomerger Merge Worker.IP
11*a71a9546SAutomerger Merge Workerctmark = (ctmark & ~ctmask) ^ (nfmark & nfmask)
12*a71a9546SAutomerger Merge Worker.IP
13*a71a9546SAutomerger Merge Workeri.e. \fIctmask\fP defines what bits to clear and \fInfmask\fP what bits of the
14*a71a9546SAutomerger Merge Workernfmark to XOR into the ctmark. \fIctmask\fP and \fInfmask\fP default to
15*a71a9546SAutomerger Merge Worker0xFFFFFFFF.
16*a71a9546SAutomerger Merge Worker.TP
17*a71a9546SAutomerger Merge Worker\fB\-\-restore\-mark\fP [\fB\-\-nfmask\fP \fInfmask\fP] [\fB\-\-ctmask\fP \fIctmask\fP]
18*a71a9546SAutomerger Merge WorkerCopy the connection mark (ctmark) to the packet mark (nfmark) using the given
19*a71a9546SAutomerger Merge Workermasks. The new ctmark value is determined as follows:
20*a71a9546SAutomerger Merge Worker.IP
21*a71a9546SAutomerger Merge Workernfmark = (nfmark & ~\fInfmask\fP) ^ (ctmark & \fIctmask\fP);
22*a71a9546SAutomerger Merge Worker.IP
23*a71a9546SAutomerger Merge Workeri.e. \fInfmask\fP defines what bits to clear and \fIctmask\fP what bits of the
24*a71a9546SAutomerger Merge Workerctmark to XOR into the nfmark. \fIctmask\fP and \fInfmask\fP default to
25*a71a9546SAutomerger Merge Worker0xFFFFFFFF.
26*a71a9546SAutomerger Merge Worker.IP
27*a71a9546SAutomerger Merge Worker\fB\-\-restore\-mark\fP is only valid in the \fBmangle\fP table.
28*a71a9546SAutomerger Merge Worker.PP
29*a71a9546SAutomerger Merge WorkerThe following mnemonics are available for \fB\-\-set\-xmark\fP:
30*a71a9546SAutomerger Merge Worker.TP
31*a71a9546SAutomerger Merge Worker\fB\-\-and\-mark\fP \fIbits\fP
32*a71a9546SAutomerger Merge WorkerBinary AND the ctmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark
33*a71a9546SAutomerger Merge Worker0/\fP\fIinvbits\fP, where \fIinvbits\fP is the binary negation of \fIbits\fP.)
34*a71a9546SAutomerger Merge Worker.TP
35*a71a9546SAutomerger Merge Worker\fB\-\-or\-mark\fP \fIbits\fP
36*a71a9546SAutomerger Merge WorkerBinary OR the ctmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark\fP
37*a71a9546SAutomerger Merge Worker\fIbits\fP\fB/\fP\fIbits\fP.)
38*a71a9546SAutomerger Merge Worker.TP
39*a71a9546SAutomerger Merge Worker\fB\-\-xor\-mark\fP \fIbits\fP
40*a71a9546SAutomerger Merge WorkerBinary XOR the ctmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark\fP
41*a71a9546SAutomerger Merge Worker\fIbits\fP\fB/0\fP.)
42*a71a9546SAutomerger Merge Worker.TP
43*a71a9546SAutomerger Merge Worker\fB\-\-set\-mark\fP \fIvalue\fP[\fB/\fP\fImask\fP]
44*a71a9546SAutomerger Merge WorkerSet the connection mark. If a mask is specified then only those bits set in the
45*a71a9546SAutomerger Merge Workermask are modified.
46*a71a9546SAutomerger Merge Worker.TP
47*a71a9546SAutomerger Merge Worker\fB\-\-save\-mark\fP [\fB\-\-mask\fP \fImask\fP]
48*a71a9546SAutomerger Merge WorkerCopy the nfmark to the ctmark. If a mask is specified, only those bits are
49*a71a9546SAutomerger Merge Workercopied.
50*a71a9546SAutomerger Merge Worker.TP
51*a71a9546SAutomerger Merge Worker\fB\-\-restore\-mark\fP [\fB\-\-mask\fP \fImask\fP]
52*a71a9546SAutomerger Merge WorkerCopy the ctmark to the nfmark. If a mask is specified, only those bits are
53*a71a9546SAutomerger Merge Workercopied. This is only valid in the \fBmangle\fP table.
54