From 761ec9e29ff867452057f59dc6ca430688b409ea Mon Sep 17 00:00:00 2001 From: Or Gerlitz Date: Thu, 19 Jul 2018 14:02:15 +0300 Subject: [PATCH] tc/flower: Add match on encapsulating tos/ttl Add matching on tos/ttl of the IP tunnel headers. For example, here's decap rule that matches on the tunnel tos: tc filter add dev vxlan_sys_4789 protocol ip parent ffff: prio 10 flower \ enc_src_ip 192.168.10.2 enc_dst_ip 192.168.10.1 enc_key_id 100 enc_dst_port 4789 enc_tos 0x30 \ src_mac e4:11:22:33:44:70 dst_mac e4:11:22:33:44:50 \ action tunnel_key unset \ action mirred egress redirect dev eth0_0 Signed-off-by: Or Gerlitz Reviewed-by: Roi Dayan Acked-by: Jiri Pirko Signed-off-by: David Ahern --- man/man8/tc-flower.8 | 14 +++++++++++++- tc/f_flower.c | 27 +++++++++++++++++++++++++++ 2 files changed, 40 insertions(+), 1 deletion(-) diff --git a/man/man8/tc-flower.8 b/man/man8/tc-flower.8 index bfa66d8a2..305d7efe0 100644 --- a/man/man8/tc-flower.8 +++ b/man/man8/tc-flower.8 @@ -76,6 +76,10 @@ flower \- flow based traffic control filter .IR ipv4_address " | " ipv6_address " } | " .B enc_dst_port .IR port_number " | " +.B enc_tos +.IR TOS " | " +.B enc_ttl +.IR TTL " | " .BR ip_flags .IR IP_FLAGS .SH DESCRIPTION @@ -275,6 +279,10 @@ bits is assumed. .BI enc_src_ip " PREFIX" .TQ .BI enc_dst_port " NUMBER" +.TQ +.BI enc_tos " NUMBER" +.TQ +.BI enc_ttl " NUMBER" Match on IP tunnel metadata. Key id .I NUMBER is a 32 bit tunnel key id (e.g. VNI for VXLAN tunnel). @@ -283,7 +291,11 @@ must be a valid IPv4 or IPv6 address optionally followed by a slash and the prefix length. If the prefix is missing, \fBtc\fR assumes a full-length host match. Dst port .I NUMBER -is a 16 bit UDP dst port. +is a 16 bit UDP dst port. Tos +.I NUMBER +is an 8 bit tos (dscp+ecn) value, ttl +.I NUMBER +is an 8 bit time-to-live value. .TP .BI ip_flags " IP_FLAGS" .I IP_FLAGS diff --git a/tc/f_flower.c b/tc/f_flower.c index 40b402651..a4cf06aa8 100644 --- a/tc/f_flower.c +++ b/tc/f_flower.c @@ -77,6 +77,8 @@ static void explain(void) " enc_dst_ip [ IPV4-ADDR | IPV6-ADDR ] |\n" " enc_src_ip [ IPV4-ADDR | IPV6-ADDR ] |\n" " enc_key_id [ KEY-ID ] |\n" + " enc_tos MASKED-IP_TOS |\n" + " enc_ttl MASKED-IP_TTL |\n" " ip_flags IP-FLAGS | \n" " enc_dst_port [ port_number ] }\n" " FILTERID := X:Y:Z\n" @@ -1019,6 +1021,26 @@ static int flower_parse_opt(struct filter_util *qu, char *handle, fprintf(stderr, "Illegal \"enc_dst_port\"\n"); return -1; } + } else if (matches(*argv, "enc_tos") == 0) { + NEXT_ARG(); + ret = flower_parse_ip_tos_ttl(*argv, + TCA_FLOWER_KEY_ENC_IP_TOS, + TCA_FLOWER_KEY_ENC_IP_TOS_MASK, + n); + if (ret < 0) { + fprintf(stderr, "Illegal \"enc_tos\"\n"); + return -1; + } + } else if (matches(*argv, "enc_ttl") == 0) { + NEXT_ARG(); + ret = flower_parse_ip_tos_ttl(*argv, + TCA_FLOWER_KEY_ENC_IP_TTL, + TCA_FLOWER_KEY_ENC_IP_TTL_MASK, + n); + if (ret < 0) { + fprintf(stderr, "Illegal \"enc_ttl\"\n"); + return -1; + } } else if (matches(*argv, "action") == 0) { NEXT_ARG(); ret = parse_action(&argc, &argv, TCA_FLOWER_ACT, n); @@ -1542,6 +1564,11 @@ static int flower_print_opt(struct filter_util *qu, FILE *f, flower_print_port("enc_dst_port", tb[TCA_FLOWER_KEY_ENC_UDP_DST_PORT]); + flower_print_ip_attr("enc_tos", tb[TCA_FLOWER_KEY_ENC_IP_TOS], + tb[TCA_FLOWER_KEY_ENC_IP_TOS_MASK]); + flower_print_ip_attr("enc_ttl", tb[TCA_FLOWER_KEY_ENC_IP_TTL], + tb[TCA_FLOWER_KEY_ENC_IP_TTL_MASK]); + flower_print_matching_flags("ip_flags", FLOWER_IP_FLAGS, tb[TCA_FLOWER_KEY_FLAGS], tb[TCA_FLOWER_KEY_FLAGS_MASK]); -- 2.47.2