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 "$DST_PORT" ]; then
26    read -r DST_MIN DST_MAX <<< $(parse_ports $DST_PORT)
27    validate_ports $DST_MIN $DST_MAX
28fi
29
30# Base Config
31DELAY="0"        # Zero means max speed
32
33# Flow variation random source port between min and max
34UDP_MIN=9
35UDP_MAX=109
36
37# General cleanup everything since last run
38# (especially important if other threads were configured by other scripts)
39pg_ctrl "reset"
40
41# Add remove all other devices and add_device $DEV to thread 0
42thread=0
43pg_thread $thread "rem_device_all"
44pg_thread $thread "add_device" $DEV
45
46# How many packets to send (zero means indefinitely)
47pg_set $DEV "count $COUNT"
48
49# Reduce alloc cost by sending same SKB many times
50# - this obviously affects the randomness within the packet
51pg_set $DEV "clone_skb $CLONE_SKB"
52
53# Set packet size
54pg_set $DEV "pkt_size $PKT_SIZE"
55
56# Delay between packets (zero means max speed)
57pg_set $DEV "delay $DELAY"
58
59# Flag example disabling timestamping
60pg_set $DEV "flag NO_TIMESTAMP"
61
62# Destination
63pg_set $DEV "dst_mac $DST_MAC"
64pg_set $DEV "dst$IP6 $DEST_IP"
65
66if [ -n "$DST_PORT" ]; then
67    # Single destination port or random port range
68    pg_set $DEV "flag UDPDST_RND"
69    pg_set $DEV "udp_dst_min $DST_MIN"
70    pg_set $DEV "udp_dst_max $DST_MAX"
71fi
72
73# Setup random UDP port src range
74pg_set $DEV "flag UDPSRC_RND"
75pg_set $DEV "udp_src_min $UDP_MIN"
76pg_set $DEV "udp_src_max $UDP_MAX"
77
78# start_run
79echo "Running... ctrl^C to stop" >&2
80pg_ctrl "start"
81echo "Done" >&2
82
83# Print results
84echo "Result device: $DEV"
85cat /proc/net/pktgen/$DEV
86