| This module sets the Type of Service field in the IPv4 header (including the |
| 'precedence' bits) or the Priority field in the IPv6 header. Note that TOS |
| shares the same bits as DSCP and ECN. The TOS target is only valid in the |
| \fBmangle\fR table. |
| .TP |
| \fB\-\-set\-tos\fP \fIvalue\fP[\fB/\fP\fImask\fP] |
| Zeroes out the bits given by \fImask\fR and XORs \fIvalue\fR into the |
| TOS/Priority field. If \fImask\fR is omitted, 0xFF is assumed. |
| .TP |
| \fB\-\-set\-tos\fP \fIsymbol\fP |
| You can specify a symbolic name when using the TOS target for IPv4. It implies |
| a mask of 0xFF. The list of recognized TOS names can be obtained by calling |
| iptables with \fB\-j TOS \-h\fP. |
| .PP |
| The following mnemonics are available: |
| .TP |
| \fB\-\-and\-tos\fP \fIbits\fP |
| Binary AND the TOS value with \fIbits\fR. (Mnemonic for \fB\-\-set\-tos |
| 0/\fR\fIinvbits\fR, where \fIinvbits\fR is the binary negation of \fIbits\fR.) |
| .TP |
| \fB\-\-or\-tos\fP \fIbits\fP |
| Binary OR the TOS value with \fIbits\fR. (Mnemonic for \fB\-\-set\-tos\fP |
| \fIbits\fR\fB/\fR\fIbits\fR.) |
| .TP |
| \fB\-\-xor\-tos\fP \fIbits\fP |
| Binary XOR the TOS value with \fIbits\fR. (Mnemonic for \fB\-\-set\-tos\fP |
| \fIbits\fR\fB/0\fR.) |
