1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# Simple example:
5#  * pktgen sending with single thread and single interface
6#  * flow variation via random UDP source port
7#
8basedir=`dirname $0`
9source ${basedir}/functions.sh
10root_check_run_with_sudo "$@"
11
12# Parameter parsing via include
13# - go look in parameters.sh to see which setting are avail
14# - required param is the interface "-i" stored in $DEV
15source ${basedir}/parameters.sh
16#
17# Set some default params, if they didn't get set
18if [ -z "$DEST_IP" ]; then
19    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
20fi
21[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
22# Example enforce param "-m" for dst_mac
23[ -z "$DST_MAC" ] && usage && err 2 "Must specify -m dst_mac"
24[ -z "$COUNT" ]   && COUNT="100000" # Zero means indefinitely
25if [ -n "$DEST_IP" ]; then
26    validate_addr${IP6} $DEST_IP
27    read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
28fi
29if [ -n "$DST_PORT" ]; then
30    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
31    validate_ports $UDP_DST_MIN $UDP_DST_MAX
32fi
33
34# Flow variation random source port between min and max
35UDP_SRC_MIN=9
36UDP_SRC_MAX=109
37
38# General cleanup everything since last run
39# (especially important if other threads were configured by other scripts)
40[ -z "$APPEND" ] && pg_ctrl "reset"
41
42# Add remove all other devices and add_device $DEV to thread 0
43thread=0
44[ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
45pg_thread $thread "add_device" $DEV
46
47# How many packets to send (zero means indefinitely)
48pg_set $DEV "count $COUNT"
49
50# Reduce alloc cost by sending same SKB many times
51# - this obviously affects the randomness within the packet
52pg_set $DEV "clone_skb $CLONE_SKB"
53
54# Set packet size
55pg_set $DEV "pkt_size $PKT_SIZE"
56
57# Delay between packets (zero means max speed)
58pg_set $DEV "delay $DELAY"
59
60# Flag example disabling timestamping
61pg_set $DEV "flag NO_TIMESTAMP"
62
63# Destination
64pg_set $DEV "dst_mac $DST_MAC"
65pg_set $DEV "dst${IP6}_min $DST_MIN"
66pg_set $DEV "dst${IP6}_max $DST_MAX"
67
68if [ -n "$DST_PORT" ]; then
69    # Single destination port or random port range
70    pg_set $DEV "flag UDPDST_RND"
71    pg_set $DEV "udp_dst_min $UDP_DST_MIN"
72    pg_set $DEV "udp_dst_max $UDP_DST_MAX"
73fi
74
75[ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
76
77# Setup random UDP port src range
78pg_set $DEV "flag UDPSRC_RND"
79pg_set $DEV "udp_src_min $UDP_SRC_MIN"
80pg_set $DEV "udp_src_max $UDP_SRC_MAX"
81
82# Run if user hits control-c
83function print_result() {
84    # Print results
85    echo "Result device: $DEV"
86    cat /proc/net/pktgen/$DEV
87}
88# trap keyboard interrupt (Ctrl-C)
89trap true SIGINT
90
91if [ -z "$APPEND" ]; then
92    # start_run
93    echo "Running... ctrl^C to stop" >&2
94    pg_ctrl "start"
95    echo "Done" >&2
96
97    print_result
98else
99    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
100fi