1 This module sets the Type of Service field in the IPv4 header (including the 2 "precedence" bits) or the Priority field in the IPv6 header. Note that TOS 3 shares the same bits as DSCP and ECN. The TOS target is only valid in the 4 \fBmangle\fP table. 5 .TP 6 \fB\-\-set\-tos\fP \fIvalue\fP[\fB/\fP\fImask\fP] 7 Zeroes out the bits given by \fImask\fP and XORs \fIvalue\fP into the 8 TOS/Priority field. If \fImask\fP is omitted, 0xFF is assumed. 9 .TP 10 \fB\-\-set\-tos\fP \fIsymbol\fP 11 You can specify a symbolic name when using the TOS target for IPv4. It implies 12 a mask of 0xFF. The list of recognized TOS names can be obtained by calling 13 iptables with \fB\-j TOS \-h\fP. 14 .PP 15 The following mnemonics are available: 16 .TP 17 \fB\-\-and\-tos\fP \fIbits\fP 18 Binary AND the TOS value with \fIbits\fP. (Mnemonic for \fB\-\-set\-tos 19 0/\fP\fIinvbits\fP, where \fIinvbits\fP is the binary negation of \fIbits\fP.) 20 .TP 21 \fB\-\-or\-tos\fP \fIbits\fP 22 Binary OR the TOS value with \fIbits\fP. (Mnemonic for \fB\-\-set\-tos\fP 23 \fIbits\fP\fB/\fP\fIbits\fP.) 24 .TP 25 \fB\-\-xor\-tos\fP \fIbits\fP 26 Binary XOR the TOS value with \fIbits\fP. (Mnemonic for \fB\-\-set\-tos\fP 27 \fIbits\fP\fB/0\fP.) 28
