build iperf 3.20

[pau-hedgehog]

Related to githedgehog/fabricator#1401

[pau-hedgehog]

I've verified this in my VLAB:

core@server-01 ~ $ toolbox iperf3 -v
░ Spawning container core-ghcr.iogithedgehogtoolbox-latest on /var/lib/toolbox/core-ghcr.io_githedgehog_toolbox-latest.
░ Press Ctrl-] three times within 1s to kill container.
iperf 3.20+ (cJSON 1.7.15)
Linux server-01 6.12.61-flatcar #1 SMP PREEMPT_DYNAMIC Fri Dec 12 15:21:28 -00 2025 x86_64
Optional features available: CPU affinity setting, IPv6 flow label, TCP congestion algorithm setting, sendfile / zerocopy, socket pacing, bind to device, support IPv4 don't fragment, POSIX threads
Container core-ghcr.iogithedgehogtoolbox-latest exited successfully.

also run a minimal test:

pau@pau-TP-P14s:~/fabricator$ bin/hhfab vlab conns -v
23:27:00 INF Hedgehog Fabricator version=v0.43.1-188-g2ba7a077-dirty-WI2051
23:27:00 INF Wiring hydrated successfully mode=if-not-present
23:27:00 DBG Control VM cpus=6 ram=6144 disk=100
23:27:00 DBG Gateway VM cpus=8 ram=6144 disk=50
23:27:00 DBG Server VM cpus=2 ram=768 disk=10
23:27:00 DBG Switch VM cpus=4 ram=5120 disk=50
23:27:00 DBG External VM cpus=4 ram=5120 disk=50
23:27:00 INF VLAB config loaded file=vlab/config.yaml
23:27:00 INF Testing server to server and server to external connectivity
23:27:00 WRN All switches are virtual, ignoring IPerf min speed
23:27:00 INF Waiting for fabricator ready timeout=10m0s
23:27:01 INF Fabricator ready gen=1 version=v0.43.1-188-g2ba7a077-dirty-WI2051
23:27:01 INF Waiting for switches and gateways ready appliedFor=15s timeout=10m0s
23:27:01 INF Expected switches agent=v0.104.0 switches="[leaf-01 leaf-02 spine-01]"
23:27:01 INF All switches and gateways are ready took=403.446568ms
23:27:01 INF Discovering server IPs servers=2
23:27:01 INF Found server=server-01 addr=10.0.1.2/24
23:27:01 INF Found server=server-02 addr=10.0.2.2/24
23:27:01 INF Running pings, iperfs and curls servers=2
23:27:01 DBG Checking connectivity from=server-01 to=server-02 expected=true reason=switch-peering peering=vpc-01--vpc-02
23:27:01 DBG Checking connectivity from=server-02 to=server-01 expected=true reason=switch-peering peering=vpc-01--vpc-02
23:27:01 DBG Checking external connectivity from=server-01 expected=false
23:27:01 DBG Checking external connectivity from=server-02 expected=false
23:27:01 DBG Running ping from=server-01 to=10.0.2.2 sourceIP=<nil> expected=true
23:27:01 DBG Running ping from=server-02 to=10.0.1.2 sourceIP=<nil> expected=true
23:27:01 DBG Running curls from=server-01 to=1.0.0.1 count=3
23:27:01 DBG Running curls from=server-02 to=1.0.0.1 count=3
23:27:01 DBG Curl result from=server-01 to=1.0.0.1 expected=false ok=false fail=true err="running command: Process exited with status 7" stdout="" stderr=""
23:27:01 DBG Curl result from=server-02 to=1.0.0.1 expected=false ok=false fail=true err="running command: Process exited with status 7" stdout="" stderr=""
23:27:01 DBG Curl result from=server-02 to=1.0.0.1 expected=false ok=false fail=true err="running command: Process exited with status 7" stdout="" stderr=""
23:27:01 DBG Curl result from=server-01 to=1.0.0.1 expected=false ok=false fail=true err="running command: Process exited with status 7" stdout="" stderr=""
23:27:03 DBG Ping result from=server-02 to=server-01 expected=true ok=true fail=false err=<nil> stdout="PING 10.0.1.2 (10.0.1.2) 56(84) bytes of data.\n64 bytes from 10.0.1.2: icmp_seq=1 ttl=63 time=1.26 ms\n64 bytes from 10.0.1.2: icmp_seq=2 ttl=63 time=1.59 ms\n64 bytes from 10.0.1.2: icmp_seq=3 ttl=63 time=1.60 ms\n64 bytes from 10.0.1.2: icmp_seq=4 ttl=63 time=1.41 ms\n64 bytes from 10.0.1.2: icmp_seq=5 ttl=63 time=1.50 ms\n--- 10.0.1.2 ping statistics ---\n5 packets transmitted, 5 received, 0% packet loss, time 2004ms\nrtt min/avg/max/mdev = 1.260/1.471/1.604/0.127 ms\n" stderr=""
23:27:03 DBG Ping result from=server-01 to=server-02 expected=true ok=true fail=false err=<nil> stdout="PING 10.0.2.2 (10.0.2.2) 56(84) bytes of data.\n64 bytes from 10.0.2.2: icmp_seq=1 ttl=62 time=2.27 ms\n64 bytes from 10.0.2.2: icmp_seq=2 ttl=62 time=1.42 ms\n64 bytes from 10.0.2.2: icmp_seq=3 ttl=62 time=1.27 ms\n64 bytes from 10.0.2.2: icmp_seq=4 ttl=62 time=1.54 ms\n64 bytes from 10.0.2.2: icmp_seq=5 ttl=62 time=1.67 ms\n--- 10.0.2.2 ping statistics ---\n5 packets transmitted, 5 received, 0% packet loss, time 2004ms\nrtt min/avg/max/mdev = 1.269/1.631/2.271/0.345 ms\n" stderr=""
23:27:04 DBG Running iperf3 from=server-02 to=server-01
23:27:05 DBG Curl result from=server-02 to=1.0.0.1 expected=false ok=false fail=true err="running command: Process exited with status 28" stdout="" stderr=""
23:27:05 DBG Curl result from=server-01 to=1.0.0.1 expected=false ok=false fail=true err="running command: Process exited with status 28" stdout="" stderr=""
23:27:14 DBG IPerf3 result from=server-02 to=server-01 sendSpeed="19.50 Mbps" receiveSpeed="19.39 Mbps" sent="24.38 MB" received="24.25 MB"
23:27:14 DBG Running iperf3 from=server-01 to=server-02
23:27:25 DBG IPerf3 result from=server-01 to=server-02 sendSpeed="22.65 Mbps" receiveSpeed="22.64 Mbps" sent="28.31 MB" received="28.31 MB"
23:27:25 INF Test connectivity passed took=24.552659844s