linux/samples/pktgen/pktgen_sample01_simple.sh
J.J. Martzki a27ac53909 samples: pktgen: fix append mode failed issue
Each sample script sources functions.sh before parameters.sh
which makes $APPEND undefined when trapping EXIT no matter in
append mode or not. Due to this when sample scripts finished
they always do "pgctrl reset" which resets pktgen config.

So move trap to each script after sourcing parameters.sh
and trap EXIT explicitly.

Signed-off-by: J.J. Martzki <mars14850@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-07-03 09:15:26 +01:00

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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Simple example:
# * pktgen sending with single thread and single interface
# * flow variation via random UDP source port
#
basedir=`dirname $0`
source ${basedir}/functions.sh
root_check_run_with_sudo "$@"
# Parameter parsing via include
# - go look in parameters.sh to see which setting are avail
# - required param is the interface "-i" stored in $DEV
source ${basedir}/parameters.sh
# Trap EXIT first
trap_exit
#
# Set some default params, if they didn't get set
if [ -z "$DEST_IP" ]; then
[ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
fi
[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
# 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 "$DEST_IP" ]; then
validate_addr${IP6} $DEST_IP
read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
fi
if [ -n "$DST_PORT" ]; then
read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
validate_ports $UDP_DST_MIN $UDP_DST_MAX
fi
# Flow variation random source port between min and max
UDP_SRC_MIN=9
UDP_SRC_MAX=109
# General cleanup everything since last run
# (especially important if other threads were configured by other scripts)
[ -z "$APPEND" ] && pg_ctrl "reset"
# Add remove all other devices and add_device $DEV to thread 0
thread=0
[ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
pg_thread $thread "add_device" $DEV
# How many packets to send (zero means indefinitely)
pg_set $DEV "count $COUNT"
# Reduce alloc cost by sending same SKB many times
# - this obviously affects the randomness within the packet
pg_set $DEV "clone_skb $CLONE_SKB"
# Set packet size
pg_set $DEV "pkt_size $PKT_SIZE"
# Delay between packets (zero means max speed)
pg_set $DEV "delay $DELAY"
# Flag example disabling timestamping
pg_set $DEV "flag NO_TIMESTAMP"
# Destination
pg_set $DEV "dst_mac $DST_MAC"
pg_set $DEV "dst${IP6}_min $DST_MIN"
pg_set $DEV "dst${IP6}_max $DST_MAX"
if [ -n "$DST_PORT" ]; then
# Single destination port or random port range
pg_set $DEV "flag UDPDST_RND"
pg_set $DEV "udp_dst_min $UDP_DST_MIN"
pg_set $DEV "udp_dst_max $UDP_DST_MAX"
fi
[ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
# Setup random UDP port src range
pg_set $DEV "flag UDPSRC_RND"
pg_set $DEV "udp_src_min $UDP_SRC_MIN"
pg_set $DEV "udp_src_max $UDP_SRC_MAX"
# Run if user hits control-c
function print_result() {
# Print results
echo "Result device: $DEV"
cat /proc/net/pktgen/$DEV
}
# trap keyboard interrupt (Ctrl-C)
trap true SIGINT
if [ -z "$APPEND" ]; then
# start_run
echo "Running... ctrl^C to stop" >&2
pg_ctrl "start"
echo "Done" >&2
print_result
else
echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
fi