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