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Message-Id: <20191120124245.3516-4-roid@mellanox.com>
Date: Wed, 20 Nov 2019 14:42:45 +0200
From: Roi Dayan <roid@...lanox.com>
To: netdev@...r.kernel.org
Cc: David Ahern <dsahern@...il.com>,
Stephen Hemminger <stephen@...workplumber.org>,
Jiri Pirko <jiri@...lanox.com>,
Eli Britstein <elibr@...lanox.com>,
Roi Dayan <roid@...lanox.com>
Subject: [PATCH iproute2-next 3/3] tc: flower: support masked port destination and source match
From: Eli Britstein <elibr@...lanox.com>
Extend destination and source port match to support masks, accepting
both decimal and hexadecimal formats.
Also add missing documentation to synopsis in manpage.
$ tc qdisc add dev eth0 ingress
$ tc filter add dev eth0 protocol ip parent ffff: prio 1 flower skip_hw \
ip_proto tcp dst_port 1234/0xff00 action drop
$ tc -s filter show dev eth0 parent ffff:
filter protocol ip pref 1 flower chain 0
filter protocol ip pref 1 flower chain 0 handle 0x1
eth_type ipv4
ip_proto tcp
dst_port 1234/0xff00
skip_hw
not_in_hw
action order 1: gact action drop
random type none pass val 0
index 1 ref 1 bind 1 installed 26 sec used 26 sec
Action statistics:
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
$ tc -p -j filter show dev eth0 parent ffff:
"options": {
"keys": {
"dst_port": 1234,
"dst_port_mask": 65280
...
Signed-off-by: Eli Britstein <elibr@...lanox.com>
Reviewed-by: Roi Dayan <roid@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
---
man/man8/tc-flower.8 | 13 ++++++-----
tc/f_flower.c | 64 ++++++++++++++++++++++++++++++++++++++++------------
2 files changed, 56 insertions(+), 21 deletions(-)
diff --git a/man/man8/tc-flower.8 b/man/man8/tc-flower.8
index 04ee194764e1..eb9eb5f0b19c 100644
--- a/man/man8/tc-flower.8
+++ b/man/man8/tc-flower.8
@@ -57,7 +57,7 @@ flower \- flow based traffic control filter
.BR dst_ip " | " src_ip " } "
.IR PREFIX " | { "
.BR dst_port " | " src_port " } { "
-.IR port_number " | "
+.IR MASKED_NUMBER " | "
.IR min_port_number-max_port_number " } | "
.B tcp_flags
.IR MASKED_TCP_FLAGS " | "
@@ -221,12 +221,13 @@ must be a valid IPv4 or IPv6 address, depending on the \fBprotocol\fR
option to tc filter, optionally followed by a slash and the prefix length.
If the prefix is missing, \fBtc\fR assumes a full-length host match.
.TP
-.IR \fBdst_port " { " NUMBER " | " " MIN_VALUE-MAX_VALUE " }
+.IR \fBdst_port " { " MASKED_NUMBER " | " " MIN_VALUE-MAX_VALUE " }
.TQ
-.IR \fBsrc_port " { " NUMBER " | " " MIN_VALUE-MAX_VALUE " }
-Match on layer 4 protocol source or destination port number. Alternatively, the
-mininum and maximum values can be specified to match on a range of layer 4
-protocol source or destination port numbers. Only available for
+.IR \fBsrc_port " { " MASKED_NUMBER " | " " MIN_VALUE-MAX_VALUE " }
+Match on layer 4 protocol source or destination port number, with an
+optional mask. Alternatively, the mininum and maximum values can be
+specified to match on a range of layer 4 protocol source or destination
+port numbers. Only available for
.BR ip_proto " values " udp ", " tcp " and " sctp
which have to be specified in beforehand.
.TP
diff --git a/tc/f_flower.c b/tc/f_flower.c
index 69de6a80735b..a193c0eca22a 100644
--- a/tc/f_flower.c
+++ b/tc/f_flower.c
@@ -637,6 +637,27 @@ static int flower_port_attr_type(__u8 ip_proto, enum flower_endpoint endpoint)
return -1;
}
+static int flower_port_attr_mask_type(__u8 ip_proto,
+ enum flower_endpoint endpoint)
+{
+ switch (ip_proto) {
+ case IPPROTO_TCP:
+ return endpoint == FLOWER_ENDPOINT_SRC ?
+ TCA_FLOWER_KEY_TCP_SRC_MASK :
+ TCA_FLOWER_KEY_TCP_DST_MASK;
+ case IPPROTO_UDP:
+ return endpoint == FLOWER_ENDPOINT_SRC ?
+ TCA_FLOWER_KEY_UDP_SRC_MASK :
+ TCA_FLOWER_KEY_UDP_DST_MASK;
+ case IPPROTO_SCTP:
+ return endpoint == FLOWER_ENDPOINT_SRC ?
+ TCA_FLOWER_KEY_SCTP_SRC_MASK :
+ TCA_FLOWER_KEY_SCTP_DST_MASK;
+ default:
+ return -1;
+ }
+}
+
static int flower_port_range_attr_type(__u8 ip_proto, enum flower_endpoint type,
__be16 *min_port_type,
__be16 *max_port_type)
@@ -681,13 +702,17 @@ static int flower_parse_port(char *str, __u8 ip_proto,
enum flower_endpoint endpoint,
struct nlmsghdr *n)
{
+ char *slash = NULL;
__be16 min = 0;
__be16 max = 0;
int ret;
ret = parse_range(str, &min, &max);
- if (ret)
- return -1;
+ if (ret) {
+ slash = strchr(str, '/');
+ if (!slash)
+ return -1;
+ }
if (min && max) {
__be16 min_port_type, max_port_type;
@@ -702,13 +727,24 @@ static int flower_parse_port(char *str, __u8 ip_proto,
addattr16(n, MAX_MSG, min_port_type, min);
addattr16(n, MAX_MSG, max_port_type, max);
- } else if (min && !max) {
+ } else if (slash || (min && !max)) {
int type;
type = flower_port_attr_type(ip_proto, endpoint);
if (type < 0)
return -1;
- addattr16(n, MAX_MSG, type, min);
+
+ if (!slash) {
+ addattr16(n, MAX_MSG, type, min);
+ } else {
+ int mask_type;
+
+ mask_type = flower_port_attr_mask_type(ip_proto,
+ endpoint);
+ if (mask_type < 0)
+ return -1;
+ return flower_parse_u16(str, type, mask_type, n, true);
+ }
} else {
return -1;
}
@@ -1715,15 +1751,10 @@ static void flower_print_ip4_addr(char *name, struct rtattr *addr_attr,
addr_attr, mask_attr, 0, 0);
}
-static void flower_print_port(char *name, struct rtattr *attr)
+static void flower_print_port(char *name, struct rtattr *attr,
+ struct rtattr *mask_attr)
{
- SPRINT_BUF(namefrm);
-
- if (!attr)
- return;
-
- sprintf(namefrm,"\n %s %%u", name);
- print_hu(PRINT_ANY, name, namefrm, rta_getattr_be16(attr));
+ print_masked_be16(name, attr, mask_attr, true);
}
static void flower_print_port_range(char *name, struct rtattr *min_attr,
@@ -2129,11 +2160,13 @@ static int flower_print_opt(struct filter_util *qu, FILE *f,
tb[TCA_FLOWER_KEY_IPV6_SRC_MASK]);
nl_type = flower_port_attr_type(ip_proto, FLOWER_ENDPOINT_DST);
+ nl_mask_type = flower_port_attr_mask_type(ip_proto, FLOWER_ENDPOINT_DST);
if (nl_type >= 0)
- flower_print_port("dst_port", tb[nl_type]);
+ flower_print_port("dst_port", tb[nl_type], tb[nl_mask_type]);
nl_type = flower_port_attr_type(ip_proto, FLOWER_ENDPOINT_SRC);
+ nl_mask_type = flower_port_attr_mask_type(ip_proto, FLOWER_ENDPOINT_SRC);
if (nl_type >= 0)
- flower_print_port("src_port", tb[nl_type]);
+ flower_print_port("src_port", tb[nl_type], tb[nl_mask_type]);
if (!flower_port_range_attr_type(ip_proto, FLOWER_ENDPOINT_DST,
&min_port_type, &max_port_type))
@@ -2193,7 +2226,8 @@ static int flower_print_opt(struct filter_util *qu, FILE *f,
flower_print_key_id("enc_key_id", tb[TCA_FLOWER_KEY_ENC_KEY_ID]);
- flower_print_port("enc_dst_port", tb[TCA_FLOWER_KEY_ENC_UDP_DST_PORT]);
+ flower_print_port("enc_dst_port", tb[TCA_FLOWER_KEY_ENC_UDP_DST_PORT],
+ tb[TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]);
flower_print_ip_attr("enc_tos", tb[TCA_FLOWER_KEY_ENC_IP_TOS],
tb[TCA_FLOWER_KEY_ENC_IP_TOS_MASK]);
--
2.8.4
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