@@ -32,6 +32,8 @@ pedit - generic packet editor action
.BI ip " IPHDR_FIELD"
|
.BI ip " EX_IPHDR_FIELD"
+|
+.BI tcp " TCPHDR_FIELD"
.RI } " CMD_SPEC"
.ti -8
@@ -52,6 +54,10 @@ pedit - generic packet editor action
.BR ttl " }"
.ti -8
+.IR TCPHDR_FIELD " := { "
+.BR sport " | " dport " | " flags " }"
+
+.ti -8
.IR CMD_SPEC " := {"
.BR clear " | " invert " | " set
.IR VAL " | "
@@ -199,6 +205,20 @@ are:
.B ttl
.RE
.TP
+.BI tcp " TCPHDR_FIELD"
+The supported keywords for
+.I TCPHDR_FIELD
+are:
+.RS
+.TP
+.B sport
+.TQ
+.B dport
+Source or destination TCP port number, a 16-bit value.
+.TP
+.B flags
+.RE
+.TP
.B clear
Clear the addressed data (i.e., set it to zero).
.TP
@@ -293,6 +313,9 @@ tc filter add dev eth0 parent ffff: u32 \\
tc filter add dev eth0 parent ffff: u32 \\
match ip sport 22 0xffff \\
action pedit ex munge eth dst set 11:22:33:44:55:66
+tc filter add dev eth0 parent ffff: u32 \\
+ match ip dport 23 0xffff \\
+ action pedit ex munge tcp dport set 22
.EE
.RE
.SH SEE ALSO
@@ -28,6 +28,43 @@ parse_tcp(int *argc_p, char ***argv_p,
struct m_pedit_sel *sel, struct m_pedit_key *tkey)
{
int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (!sel->extended)
+ return -1;
+
+ tkey->htype = TCA_PEDIT_KEY_EX_HDR_TYPE_TCP;
+
+ if (strcmp(*argv, "sport") == 0) {
+ NEXT_ARG();
+ tkey->off = 0;
+ res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey);
+ goto done;
+ }
+
+ if (strcmp(*argv, "dport") == 0) {
+ NEXT_ARG();
+ tkey->off = 2;
+ res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey);
+ goto done;
+ }
+
+ if (strcmp(*argv, "flags") == 0) {
+ NEXT_ARG();
+ tkey->off = 13;
+ res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey);
+ goto done;
+ }
+
+ return -1;
+
+done:
+ *argc_p = argc;
+ *argv_p = argv;
return res;
}
struct m_pedit_util p_pedit_tcp = {
For example, forward tcp traffic destined to port 80 to veth0 and set tcp port to 8080: $ tc filter add dev enp0s9 protocol ip parent ffff: \ flower \ ip_proto tcp \ dst_port 80 \ action pedit ex munge \ tcp dport set 8080 \ action mirred egress \ redirect dev veth0 Signed-off-by: Amir Vadai <amir@vadai.me> --- man/man8/tc-pedit.8 | 23 +++++++++++++++++++++++ tc/p_tcp.c | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 60 insertions(+)