[PATCH 1/2] samples: pktgen: add some helper functions for port parsing

[PATCH 1/2] samples: pktgen: add some helper functions for port parsing

[Daniel T. Lee]

This commit adds port parsing and port validate helper function to parse
single or range of port(s) from a given string. (e.g. 1234, 443-444)

Helpers will be used in prior to set target port(s) in samples/pktgen.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
---
 samples/pktgen/functions.sh | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/samples/pktgen/functions.sh b/samples/pktgen/functions.sh
index f8bb3cd0f4ce..4af4046d71be 100644
--- a/samples/pktgen/functions.sh
+++ b/samples/pktgen/functions.sh
@@ -162,3 +162,37 @@ function get_node_cpus()
 
 	echo $node_cpu_list
 }
+
+# Given a single or range of port(s), return minimum and maximum port number.
+function parse_ports()
+{
+    local port_str=$1
+    local port_list
+    local min_port
+    local max_port
+
+    IFS="-" read -ra port_list <<< $port_str
+
+    min_port=${port_list[0]}
+    max_port=${port_list[1]:-$min_port}
+
+    echo $min_port $max_port
+}
+
+# Given a minimum and maximum port, verify port number.
+function validate_ports()
+{
+    local min_port=$1
+    local max_port=$2
+
+    # 0 < port < 65536
+    if [[ $min_port -gt 0 && $min_port -lt 65536 ]]; then
+	if [[ $max_port -gt 0 && $max_port -lt 65536 ]]; then
+	    if [[ $min_port -le $max_port ]]; then
+		return 0
+	    fi
+	fi
+    fi
+
+    err 5 "Invalid port(s): $min_port-$max_port"
+}
-- 
2.17.1

[PATCH 2/2] samples: pktgen: allow to specify destination port

[Daniel T. Lee]

Currently, kernel pktgen has the feature to specify udp destination port
for sending packet. (e.g. pgset "udp_dst_min 9")

But on samples, each of the scripts doesn't have any option to achieve this.

This commit adds the DST_PORT option to specify the target port(s) in the script.

    -p : ($DST_PORT)  destination PORT range (e.g. 433-444) is also allowed

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
---
 samples/pktgen/README.rst                            |  1 +
 samples/pktgen/parameters.sh                         |  7 ++++++-
 .../pktgen/pktgen_bench_xmit_mode_netif_receive.sh   | 11 +++++++++++
 samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh  | 11 +++++++++++
 samples/pktgen/pktgen_sample01_simple.sh             | 11 +++++++++++
 samples/pktgen/pktgen_sample02_multiqueue.sh         | 11 +++++++++++
 samples/pktgen/pktgen_sample03_burst_single_flow.sh  | 11 +++++++++++
 samples/pktgen/pktgen_sample04_many_flows.sh         | 11 +++++++++++
 samples/pktgen/pktgen_sample05_flow_per_thread.sh    | 12 +++++++++++-
 ...pktgen_sample06_numa_awared_queue_irq_affinity.sh | 11 +++++++++++
 10 files changed, 95 insertions(+), 2 deletions(-)

diff --git a/samples/pktgen/README.rst b/samples/pktgen/README.rst
index ff8929da61c5..fd39215db508 100644
--- a/samples/pktgen/README.rst
+++ b/samples/pktgen/README.rst
@@ -20,6 +20,7 @@ across the sample scripts.  Usage example is printed on errors::
   -s : ($PKT_SIZE)  packet size
   -d : ($DEST_IP)   destination IP
   -m : ($DST_MAC)   destination MAC-addr
+  -p : ($DST_PORT)  destination PORT range (e.g. 433-444) is also allowed
   -t : ($THREADS)   threads to start
   -f : ($F_THREAD)  index of first thread (zero indexed CPU number)
   -c : ($SKB_CLONE) SKB clones send before alloc new SKB
diff --git a/samples/pktgen/parameters.sh b/samples/pktgen/parameters.sh
index 72fc562876e2..a06b00a0c7b6 100644
--- a/samples/pktgen/parameters.sh
+++ b/samples/pktgen/parameters.sh
@@ -10,6 +10,7 @@ function usage() {
     echo "  -s : (\$PKT_SIZE)  packet size"
     echo "  -d : (\$DEST_IP)   destination IP"
     echo "  -m : (\$DST_MAC)   destination MAC-addr"
+    echo "  -p : (\$DST_PORT)  destination PORT range (e.g. 433-444) is also allowed"
     echo "  -t : (\$THREADS)   threads to start"
     echo "  -f : (\$F_THREAD)  index of first thread (zero indexed CPU number)"
     echo "  -c : (\$SKB_CLONE) SKB clones send before alloc new SKB"
@@ -23,7 +24,7 @@ function usage() {
 
 ##  --- Parse command line arguments / parameters ---
 ## echo "Commandline options:"
-while getopts "s:i:d:m:f:t:c:n:b:vxh6" option; do
+while getopts "s:i:d:m:p:f:t:c:n:b:vxh6" option; do
     case $option in
         i) # interface
           export DEV=$OPTARG
@@ -41,6 +42,10 @@ while getopts "s:i:d:m:f:t:c:n:b:vxh6" option; do
           export DST_MAC=$OPTARG
 	  info "Destination MAC set to: DST_MAC=$DST_MAC"
           ;;
+        p) # PORT
+          export DST_PORT=$OPTARG
+	  info "Destination PORT set to: DST_PORT=$DST_PORT"
+          ;;
         f)
 	  export F_THREAD=$OPTARG
 	  info "Index of first thread (zero indexed CPU number): $F_THREAD"
diff --git a/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
index 2839f7d315cf..e14b1a9144d9 100755
--- a/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
+++ b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
@@ -41,6 +41,10 @@ fi
 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
 [ -z "$BURST" ] && BURST=1024
 [ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely
+if [ -n "$DST_PORT" ]; then
+    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
+    validate_ports $DST_MIN $DST_MAX
+fi
 
 # Base Config
 DELAY="0"        # Zero means max speed
@@ -69,6 +73,13 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     pg_set $dev "dst_mac $DST_MAC"
     pg_set $dev "dst$IP6 $DEST_IP"
 
+    if [ -n "$DST_PORT" ]; then
+	# Single destination port or random port range
+	pg_set $dev "flag UDPDST_RND"
+	pg_set $dev "udp_dst_min $DST_MIN"
+	pg_set $dev "udp_dst_max $DST_MAX"
+    fi
+
     # Inject packet into RX path of stack
     pg_set $dev "xmit_mode netif_receive"
 
diff --git a/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh b/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh
index e1ee54465def..82c3e504e056 100755
--- a/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh
+++ b/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh
@@ -24,6 +24,10 @@ if [[ -n "$BURST" ]]; then
     err 1 "Bursting not supported for this mode"
 fi
 [ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely
+if [ -n "$DST_PORT" ]; then
+    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
+    validate_ports $DST_MIN $DST_MAX
+fi
 
 # Base Config
 DELAY="0"        # Zero means max speed
@@ -52,6 +56,13 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     pg_set $dev "dst_mac $DST_MAC"
     pg_set $dev "dst$IP6 $DEST_IP"
 
+    if [ -n "$DST_PORT" ]; then
+	# Single destination port or random port range
+	pg_set $dev "flag UDPDST_RND"
+	pg_set $dev "udp_dst_min $DST_MIN"
+	pg_set $dev "udp_dst_max $DST_MAX"
+    fi
+
     # Inject packet into TX qdisc egress path of stack
     pg_set $dev "xmit_mode queue_xmit"
 done
diff --git a/samples/pktgen/pktgen_sample01_simple.sh b/samples/pktgen/pktgen_sample01_simple.sh
index e9ab4edba2d7..d1702fdde8f3 100755
--- a/samples/pktgen/pktgen_sample01_simple.sh
+++ b/samples/pktgen/pktgen_sample01_simple.sh
@@ -22,6 +22,10 @@ fi
 # Example enforce param "-m" for dst_mac
 [ -z "$DST_MAC" ] && usage && err 2 "Must specify -m dst_mac"
 [ -z "$COUNT" ]   && COUNT="100000" # Zero means indefinitely
+if [ -n "$DST_PORT" ]; then
+    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
+    validate_ports $DST_MIN $DST_MAX
+fi
 
 # Base Config
 DELAY="0"        # Zero means max speed
@@ -59,6 +63,13 @@ pg_set $DEV "flag NO_TIMESTAMP"
 pg_set $DEV "dst_mac $DST_MAC"
 pg_set $DEV "dst$IP6 $DEST_IP"
 
+if [ -n "$DST_PORT" ]; then
+    # Single destination port or random port range
+    pg_set $DEV "flag UDPDST_RND"
+    pg_set $DEV "udp_dst_min $DST_MIN"
+    pg_set $DEV "udp_dst_max $DST_MAX"
+fi
+
 # Setup random UDP port src range
 pg_set $DEV "flag UDPSRC_RND"
 pg_set $DEV "udp_src_min $UDP_MIN"
diff --git a/samples/pktgen/pktgen_sample02_multiqueue.sh b/samples/pktgen/pktgen_sample02_multiqueue.sh
index 99f740ae9857..7f7a9a27548f 100755
--- a/samples/pktgen/pktgen_sample02_multiqueue.sh
+++ b/samples/pktgen/pktgen_sample02_multiqueue.sh
@@ -29,6 +29,10 @@ if [ -z "$DEST_IP" ]; then
     [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
 fi
 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
+if [ -n "$DST_PORT" ]; then
+    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
+    validate_ports $DST_MIN $DST_MAX
+fi
 
 # General cleanup everything since last run
 pg_ctrl "reset"
@@ -60,6 +64,13 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     pg_set $dev "dst_mac $DST_MAC"
     pg_set $dev "dst$IP6 $DEST_IP"
 
+    if [ -n "$DST_PORT" ]; then
+	# Single destination port or random port range
+	pg_set $dev "flag UDPDST_RND"
+	pg_set $dev "udp_dst_min $DST_MIN"
+	pg_set $dev "udp_dst_max $DST_MAX"
+    fi
+
     # Setup random UDP port src range
     pg_set $dev "flag UDPSRC_RND"
     pg_set $dev "udp_src_min $UDP_MIN"
diff --git a/samples/pktgen/pktgen_sample03_burst_single_flow.sh b/samples/pktgen/pktgen_sample03_burst_single_flow.sh
index 8fdd36722d9e..b520637817ce 100755
--- a/samples/pktgen/pktgen_sample03_burst_single_flow.sh
+++ b/samples/pktgen/pktgen_sample03_burst_single_flow.sh
@@ -33,6 +33,10 @@ fi
 [ -z "$BURST" ]     && BURST=32
 [ -z "$CLONE_SKB" ] && CLONE_SKB="0" # No need for clones when bursting
 [ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
+if [ -n "$DST_PORT" ]; then
+    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
+    validate_ports $DST_MIN $DST_MAX
+fi
 
 # Base Config
 DELAY="0"  # Zero means max speed
@@ -60,6 +64,13 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     pg_set $dev "dst_mac $DST_MAC"
     pg_set $dev "dst$IP6 $DEST_IP"
 
+    if [ -n "$DST_PORT" ]; then
+	# Single destination port or random port range
+	pg_set $dev "flag UDPDST_RND"
+	pg_set $dev "udp_dst_min $DST_MIN"
+	pg_set $dev "udp_dst_max $DST_MAX"
+    fi
+
     # Setup burst, for easy testing -b 0 disable bursting
     # (internally in pktgen default and minimum burst=1)
     if [[ ${BURST} -ne 0 ]]; then
diff --git a/samples/pktgen/pktgen_sample04_many_flows.sh b/samples/pktgen/pktgen_sample04_many_flows.sh
index 4df92b7176da..5b6e9d9cb5b5 100755
--- a/samples/pktgen/pktgen_sample04_many_flows.sh
+++ b/samples/pktgen/pktgen_sample04_many_flows.sh
@@ -17,6 +17,10 @@ source ${basedir}/parameters.sh
 [ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"
 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
 [ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
+if [ -n "$DST_PORT" ]; then
+    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
+    validate_ports $DST_MIN $DST_MAX
+fi
 
 # NOTICE:  Script specific settings
 # =======
@@ -56,6 +60,13 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     pg_set $dev "dst_mac $DST_MAC"
     pg_set $dev "dst $DEST_IP"
 
+    if [ -n "$DST_PORT" ]; then
+	# Single destination port or random port range
+	pg_set $dev "flag UDPDST_RND"
+	pg_set $dev "udp_dst_min $DST_MIN"
+	pg_set $dev "udp_dst_max $DST_MAX"
+    fi
+
     # Randomize source IP-addresses
     pg_set $dev "flag IPSRC_RND"
     pg_set $dev "src_min 198.18.0.0"
diff --git a/samples/pktgen/pktgen_sample05_flow_per_thread.sh b/samples/pktgen/pktgen_sample05_flow_per_thread.sh
index 7f8b5e59f01e..0c06e63fbe97 100755
--- a/samples/pktgen/pktgen_sample05_flow_per_thread.sh
+++ b/samples/pktgen/pktgen_sample05_flow_per_thread.sh
@@ -22,7 +22,10 @@ source ${basedir}/parameters.sh
 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
 [ -z "$BURST" ]     && BURST=32
 [ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
-
+if [ -n "$DST_PORT" ]; then
+    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
+    validate_ports $DST_MIN $DST_MAX
+fi
 
 # Base Config
 DELAY="0"  # Zero means max speed
@@ -50,6 +53,13 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     pg_set $dev "dst_mac $DST_MAC"
     pg_set $dev "dst $DEST_IP"
 
+    if [ -n "$DST_PORT" ]; then
+	# Single destination port or random port range
+	pg_set $dev "flag UDPDST_RND"
+	pg_set $dev "udp_dst_min $DST_MIN"
+	pg_set $dev "udp_dst_max $DST_MAX"
+    fi
+
     # Setup source IP-addresses based on thread number
     pg_set $dev "src_min 198.18.$((thread+1)).1"
     pg_set $dev "src_max 198.18.$((thread+1)).1"
diff --git a/samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh b/samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh
index 353adc17205e..97f0266c0356 100755
--- a/samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh
+++ b/samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh
@@ -35,6 +35,10 @@ if [ -z "$DEST_IP" ]; then
     [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
 fi
 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
+if [ -n "$DST_PORT" ]; then
+    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
+    validate_ports $DST_MIN $DST_MAX
+fi
 
 # General cleanup everything since last run
 pg_ctrl "reset"
@@ -77,6 +81,13 @@ for ((i = 0; i < $THREADS; i++)); do
     pg_set $dev "dst_mac $DST_MAC"
     pg_set $dev "dst$IP6 $DEST_IP"
 
+    if [ -n "$DST_PORT" ]; then
+	# Single destination port or random port range
+	pg_set $dev "flag UDPDST_RND"
+	pg_set $dev "udp_dst_min $DST_MIN"
+	pg_set $dev "udp_dst_max $DST_MAX"
+    fi
+
     # Setup random UDP port src range
     pg_set $dev "flag UDPSRC_RND"
     pg_set $dev "udp_src_min $UDP_MIN"
-- 
2.17.1

Re: [PATCH 1/2] samples: pktgen: add some helper functions for port parsing

[Jesper Dangaard Brouer]

On Sat, 29 Jun 2019 22:33:57 +0900
"Daniel T. Lee" <danieltimlee@gmail.com> wrote:

> This commit adds port parsing and port validate helper function to parse
> single or range of port(s) from a given string. (e.g. 1234, 443-444)
> 
> Helpers will be used in prior to set target port(s) in samples/pktgen.
> 
> Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
> ---
>  samples/pktgen/functions.sh | 34 ++++++++++++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)


Nice bash shellcode with use of array variables.

Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>

> diff --git a/samples/pktgen/functions.sh b/samples/pktgen/functions.sh
> index f8bb3cd0f4ce..4af4046d71be 100644
> --- a/samples/pktgen/functions.sh
> +++ b/samples/pktgen/functions.sh
> @@ -162,3 +162,37 @@ function get_node_cpus()
>  
>  	echo $node_cpu_list
>  }
> +
> +# Given a single or range of port(s), return minimum and maximum port number.
> +function parse_ports()
> +{
> +    local port_str=$1
> +    local port_list
> +    local min_port
> +    local max_port
> +
> +    IFS="-" read -ra port_list <<< $port_str
> +
> +    min_port=${port_list[0]}
> +    max_port=${port_list[1]:-$min_port}
> +
> +    echo $min_port $max_port
> +}
> +
> +# Given a minimum and maximum port, verify port number.
> +function validate_ports()
> +{
> +    local min_port=$1
> +    local max_port=$2
> +
> +    # 0 < port < 65536
> +    if [[ $min_port -gt 0 && $min_port -lt 65536 ]]; then
> +	if [[ $max_port -gt 0 && $max_port -lt 65536 ]]; then
> +	    if [[ $min_port -le $max_port ]]; then
> +		return 0
> +	    fi
> +	fi
> +    fi
> +
> +    err 5 "Invalid port(s): $min_port-$max_port"
> +}



-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer

Re: [PATCH 2/2] samples: pktgen: allow to specify destination port

[Jesper Dangaard Brouer]

On Sat, 29 Jun 2019 22:33:58 +0900
"Daniel T. Lee" <danieltimlee@gmail.com> wrote:

> Currently, kernel pktgen has the feature to specify udp destination port
> for sending packet. (e.g. pgset "udp_dst_min 9")
> 
> But on samples, each of the scripts doesn't have any option to achieve this.
> 
> This commit adds the DST_PORT option to specify the target port(s) in the script.
> 
>     -p : ($DST_PORT)  destination PORT range (e.g. 433-444) is also allowed
> 
> Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>

Nice feature, this look very usable for testing.  I think my QA asked
me for something similar.

One nitpick is that script named pktgen_sample03_burst_single_flow.sh
implies this is a single flow, but by specifying a port-range this will
be more flows.  I'm okay with adding this, as the end-user specifying a
port-range should realize this.  Thus, you get my ACK.

Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>

Another thing you should realize (but you/we cannot do anything about)
is that when the scripts use burst or clone, then the port (UDPDST_RND)
will be the same for all packets in the same burst.  I don't know if it
matters for your use-case.

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer

Re: [PATCH 1/2] samples: pktgen: add some helper functions for port parsing

[David Miller]

From: "Daniel T. Lee" <danieltimlee@gmail.com>
Date: Sat, 29 Jun 2019 22:33:57 +0900

> This commit adds port parsing and port validate helper function to parse
> single or range of port(s) from a given string. (e.g. 1234, 443-444)
> 
> Helpers will be used in prior to set target port(s) in samples/pktgen.
> 
> Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>

Applied.

Re: [PATCH 2/2] samples: pktgen: allow to specify destination port

[David Miller]

From: "Daniel T. Lee" <danieltimlee@gmail.com>
Date: Sat, 29 Jun 2019 22:33:58 +0900

> Currently, kernel pktgen has the feature to specify udp destination port
> for sending packet. (e.g. pgset "udp_dst_min 9")
> 
> But on samples, each of the scripts doesn't have any option to achieve this.
> 
> This commit adds the DST_PORT option to specify the target port(s) in the script.
> 
>     -p : ($DST_PORT)  destination PORT range (e.g. 433-444) is also allowed
> 
> Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>

Applied.

Re: [PATCH 2/2] samples: pktgen: allow to specify destination port

[Daniel T. Lee]

Thanks for the review!

About the equivalent port in the same burst thing, I didn't realize it
would work in
that way. It doesn't matter in my use-case, but thank you for letting me know!

On Tue, Jul 2, 2019 at 12:08 AM Jesper Dangaard Brouer
<brouer@redhat.com> wrote:
>
> On Sat, 29 Jun 2019 22:33:58 +0900
> "Daniel T. Lee" <danieltimlee@gmail.com> wrote:
>
> > Currently, kernel pktgen has the feature to specify udp destination port
> > for sending packet. (e.g. pgset "udp_dst_min 9")
> >
> > But on samples, each of the scripts doesn't have any option to achieve this.
> >
> > This commit adds the DST_PORT option to specify the target port(s) in the script.
> >
> >     -p : ($DST_PORT)  destination PORT range (e.g. 433-444) is also allowed
> >
> > Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
>
> Nice feature, this look very usable for testing.  I think my QA asked
> me for something similar.
>
> One nitpick is that script named pktgen_sample03_burst_single_flow.sh
> implies this is a single flow, but by specifying a port-range this will
> be more flows.  I'm okay with adding this, as the end-user specifying a
> port-range should realize this.  Thus, you get my ACK.
>
> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
>
> Another thing you should realize (but you/we cannot do anything about)
> is that when the scripts use burst or clone, then the port (UDPDST_RND)
> will be the same for all packets in the same burst.  I don't know if it
> matters for your use-case.
>
> --
> Best regards,
>   Jesper Dangaard Brouer
>   MSc.CS, Principal Kernel Engineer at Red Hat
>   LinkedIn: http://www.linkedin.com/in/brouer