[Bug] looping inflates some packet counters

[infrastation]

Describe the bug
Some of the statistics become incorrect when the loop counter is greater than the default one.

To Reproduce
Steps to reproduce the behavior:

1. Run tcpreplay with a file that includes both flow and non-flow packets without the -l flag and note the counters.
2. Run tcpreplay again with two loops and note that "successful packets" are twice as high, whereas "flow packets" and "non-flow" are 4 times (2*2) as high.
3. Run tcpreplay again with three loops and note that "successful packets" are three times as high, whereas "flow packets" and "non-flow" are 9 times (3*3) as high.
4. ...and so on

Expected behavior
The counters are proportional to the number of loops rather than the square of the number of loops.

Screenshots

# tcpreplay --mbps 1 -i eth0 isakmp4500.pcap 
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Actual: 35 packets (6246 bytes) sent in 0.049980 seconds
Rated: 124969.9 Bps, 0.999 Mbps, 700.28 pps
Flows: 4 flows, 80.03 fps, 27 flow packets, 8 non-flow
Statistics for network device: eth0
	Successful packets:        35
	Failed packets:            0
	Truncated packets:         0
	Retried packets (ENOBUFS): 0
	Retried packets (EAGAIN):  0

# tcpreplay -l 2 --mbps 1 -i eth0 isakmp4500.pcap 
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Actual: 70 packets (12492 bytes) sent in 0.099940 seconds
Rated: 124994.9 Bps, 0.999 Mbps, 700.42 pps
Flows: 4 flows, 40.02 fps, 108 flow packets, 32 non-flow
Statistics for network device: eth0
	Successful packets:        70
	Failed packets:            0
	Truncated packets:         0
	Retried packets (ENOBUFS): 0
	Retried packets (EAGAIN):  0

# tcpreplay -l 3 --mbps 1 -i eth0 isakmp4500.pcap 
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Actual: 105 packets (18738 bytes) sent in 0.149910 seconds
Rated: 124994.9 Bps, 0.999 Mbps, 700.42 pps
Flows: 4 flows, 26.68 fps, 243 flow packets, 72 non-flow
Statistics for network device: eth0
	Successful packets:        105
	Failed packets:            0
	Truncated packets:         0
	Retried packets (ENOBUFS): 0
	Retried packets (EAGAIN):  0

# tcpreplay -l 4 --mbps 1 -i eth0 isakmp4500.pcap 
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Warning: isakmp4500.pcap was captured using a snaplen of 1536 bytes.  This may mean you have truncated packets.
Actual: 140 packets (24984 bytes) sent in 0.199878 seconds
Rated: 124996.2 Bps, 0.999 Mbps, 700.42 pps
Flows: 4 flows, 20.01 fps, 432 flow packets, 128 non-flow
Statistics for network device: eth0
	Successful packets:        140
	Failed packets:            0
	Truncated packets:         0
	Retried packets (ENOBUFS): 0
	Retried packets (EAGAIN):  0

System:

• OS: Ubuntu Linux 22.04 AMD64
• Tcpreplay master branch at commit 76644c2

[fklassen]

Fixed in PR #765 and targeted for v4.4.3.

Verification:

# tcpreplay -i enp0s5 -l1 --mbps=1 ping.pcap
Actual: 16 packets (1568 bytes) sent in 0.012564 seconds
Rated: 124801.0 Bps, 0.998 Mbps, 1273.47 pps
Flows: 2 flows, 159.18 fps, 16 unique flow packets, 0 unique non-flow packets
Statistics for network device: enp0s5
        Successful packets:        16
        Failed packets:            0
        Truncated packets:         0
        Retried packets (ENOBUFS): 0
        Retried packets (EAGAIN):  0

# tcpreplay -i enp0s5 -l1 --mbps=1 -K ping.pcap
File Cache is enabled
Actual: 16 packets (1568 bytes) sent in 0.012561 seconds
Rated: 124830.8 Bps, 0.998 Mbps, 1273.78 pps
Flows: 2 flows, 159.22 fps, 16 unique flow packets, 0 unique non-flow packets
Statistics for network device: enp0s5
        Successful packets:        16
        Failed packets:            0
        Truncated packets:         0
        Retried packets (ENOBUFS): 0
        Retried packets (EAGAIN):  0

# tcpreplay -i enp0s5 -l10 --mbps=1 ping.pcap
Actual: 160 packets (15680 bytes) sent in 0.125452 seconds
Rated: 124988.0 Bps, 0.999 Mbps, 1275.38 pps
Flows: 2 flows, 15.94 fps, 160 unique flow packets, 0 unique non-flow packets
Statistics for network device: enp0s5
        Successful packets:        160
        Failed packets:            0
        Truncated packets:         0
        Retried packets (ENOBUFS): 0
        Retried packets (EAGAIN):  0

# tcpreplay -i enp0s5 -l10 --mbps=1 -K ping.pcap
File Cache is enabled
Actual: 160 packets (15680 bytes) sent in 0.125451 seconds
Rated: 124989.0 Bps, 0.999 Mbps, 1275.39 pps
Flows: 2 flows, 15.94 fps, 16 unique flow packets, 0 unique non-flow packets
Statistics for network device: enp0s5
        Successful packets:        160
        Failed packets:            0
        Truncated packets:         0
        Retried packets (ENOBUFS): 0
        Retried packets (EAGAIN):  0

# tcpreplay -i enp0s5 -l10 --mbps=1 --unique-ip --unique-ip-loops=3 ping.pcap
Actual: 160 packets (15680 bytes) sent in 0.125451 seconds
Rated: 124989.0 Bps, 0.999 Mbps, 1275.39 pps
Flows: 20 flows, 159.42 fps, 160 unique flow packets, 0 unique non-flow packets
Statistics for network device: enp0s5
        Successful packets:        160
        Failed packets:            0
        Truncated packets:         0
        Retried packets (ENOBUFS): 0
        Retried packets (EAGAIN):  0

# tcpreplay -i enp0s5 -l10 --mbps=1 --unique-ip --unique-ip-loops=3 -K ping.pcap
File Cache is enabled
Actual: 160 packets (15680 bytes) sent in 0.125457 seconds
Rated: 124983.0 Bps, 0.999 Mbps, 1275.33 pps
Flows: 20 flows, 159.41 fps, 160 unique flow packets, 0 unique non-flow packets
Statistics for network device: enp0s5
        Successful packets:        160
        Failed packets:            0
        Truncated packets:         0
        Retried packets (ENOBUFS): 0
        Retried packets (EAGAIN):  0

# tcpreplay -i enp0s5 -l10 --mbps=1 --unique-ip --unique-ip-loops=3 ping.pcap
Actual: 160 packets (15680 bytes) sent in 0.125456 seconds
Rated: 124984.0 Bps, 0.999 Mbps, 1275.34 pps
Flows: 8 flows, 63.76 fps, 64 unique flow packets, 0 unique non-flow packets
Statistics for network device: enp0s5
        Successful packets:        160
        Failed packets:            0
        Truncated packets:         0
        Retried packets (ENOBUFS): 0
        Retried packets (EAGAIN):  0

# tcpreplay -i enp0s5 -l10 --mbps=1 --unique-ip --unique-ip-loops=3 -K ping.pcap
File Cache is enabled
Actual: 160 packets (15680 bytes) sent in 0.125450 seconds
Rated: 124990.0 Bps, 0.999 Mbps, 1275.40 pps
Flows: 8 flows, 63.77 fps, 64 unique flow packets, 0 unique non-flow packets
Statistics for network device: enp0s5
        Successful packets:        160
        Failed packets:            0
        Truncated packets:         0
        Retried packets (ENOBUFS): 0
        Retried packets (EAGAIN):  0

# tcpreplay-edit -i enp0s5 -l10 --mbps=1 --seed=42 ping.pcap
Actual: 160 packets (15680 bytes) sent in 0.125454 seconds
Rated: 124986.0 Bps, 0.999 Mbps, 1275.36 pps
Flows: 20 flows, 159.42 fps, 160 unique flow packets, 0 unique non-flow packets
Statistics for network device: enp0s5
        Successful packets:        160
        Failed packets:            0
        Truncated packets:         0
        Retried packets (ENOBUFS): 0
        Retried packets (EAGAIN):  0

[infrastation]

Thank you!