[strongSwan] Mobike on strongswan MAC OSX Client

Tue Jul 28 19:30:33 CEST 2020

Hello,
I am facing issue with strongswan MAC OS X client which I have compiled from source. 
version--------------Starting IKE charon daemon (strongSwan 5.7.2dr2, Linux 4.15.0-112-generic, x86_64)
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I am able to connect to server in road warrior scenario. When I switch wifi on my MAC laptop, source outer IP address (192.168.1.5) does not change for IKE SA.
Here is the log what happens after I switch WiFi connectionl 28 19:57:41 03[NET] error writing to socket: Can’t assign requested addressJul 28 19:57:41 10[KNL] ExC: 192.168.1.112 appeared on en0Jul 28 19:57:41 10[KNL] ExC: en0 is up amd changedJul 28 19:57:41 10[IKE] ExC: Schedule Route ReinstallJul 28 19:57:41 09[IKE] ExC: reinstall startJul 28 19:57:41 10[KNL] creating roam job due to address/link changeJul 28 19:57:41 10[IKE] <exd-1|1> ExC: Roaming startJul 28 19:57:41 10[IKE] <exd-1|1> ExC: Check current pathJul 28 19:57:41 10[KNL] <exd-1|1> using 192.168.1.5 as address to reach 32.2.4.18Jul 28 19:57:41 10[IKE] <exd-1|1> keeping connection path 192.168.1.5 - 32.2.4.18Jul 28 19:57:41 10[IKE] <exd-1|1> sending address list update using MOBIKEJul 28 19:57:41 10[IKE] <exd-1|1> queueing IKE_MOBIKE taskJul 28 19:57:41 10[IKE] <exd-1|1> EXC: task_manager initiateJul 28 19:57:41 10[IKE] <exd-1|1> activating new tasksJul 28 19:57:41 10[IKE] <exd-1|1>   activating IKE_MOBIKE taskJul 28 19:57:41 10[IKE] <exd-1|1> ExC: start msg generation (me 192.168.1.5)Jul 28 19:57:41 10[KNL] <exd-1|1> using 192.168.1.5 as address to reach 32.2.4.18Jul 28 19:57:41 10[IKE] <exd-1|1> EER 1: IKE-SA-IDJul 28 19:57:41 10[IKE] <exd-1|1> EER: SA-ID: 1, My Host 192.168.1.5[4500], Other 32.2.4.18[4500], SPI 000000000ae53452Jul 28 19:57:41 10[IKE] <exd-1|1> EER: CHILD SA: cnt 2Jul 28 19:57:41 10[ENC] <exd-1|1> generating INFORMATIONAL request 11 [ N(ADD_4_ADDR) N(ADD_4_ADDR) ]Jul 28 19:57:41 10[KNL] <exd-1|1> using 192.168.1.5 as address to reach 32.2.4.18Jul 28 19:57:41 10[NET] <exd-1|1> sending packet: sock: from 192.168.1.5[4500] to 32.2.4.18[4500] (96 bytes)Jul 28 19:57:41 03[NET] error writing to socket: Can’t assign requested addressJul 28 19:57:41 03[NET] error writing to socket: Can’t assign requested addressJul 28 19:57:42 03[NET] error writing to socket: Can’t assign requested addressJul 28 19:57:42 03[NET] error writing to socket: Can’t assign requested addressJul 28 19:57:42 03[NET] error writing to socket: Can’t assign requested address=========================Please note that 192.168.1.5 is the earlier IP address with which IKE could be established.
list-sas  output
ESTABLISHED, IKEv2, d84a1ea80c9f9b35_i* 84744da70ab07c50_r  local  'pan.r at ex.net’ @ 192.168.1.5[4500] [172.4.0.2]  remote ‘exd.ex.net’ @ 32.2.4.18[4500]  AES_CBC-128/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/CURVE_25519  established 53s ago, rekeying in 13127s, reauth in 84265s  exd: #6, reqid 5, INSTALLED, TUNNEL-in-UDP, ESP:AES_CBC-128/HMAC_SHA2_256_128    installed 55s ago, rekeying in 3302s, expires in 3907s    in  943a60be,    385 bytes,     5 packets,    49s ago    out c504033d,    322 bytes,     5 packets,    49s ago    local  172.4.0.2/32    remote 192.168.124.0/24  exd-0: #7, reqid 6, INSTALLED, TUNNEL-in-UDP, ESP:AES_CBC-128/HMAC_SHA2_256_128    installed 49s ago, rekeying in 3191s, expires in 3911s    in  7072d8c3, 104160 bytes,   160 packets,    16s ago    out c1ba4664,  86131 bytes,   345 packets,     0s ago    local  172.4.0.2/32    remote 192.168.125.100/32


load-conns outputexd: IKEv2, no reauthentication, rekeying every 14400s, dpd delay 200s
  local:  %any  remote: exe4oho.exium.net  local EAP_EXPANDED authentication:    id: pan.r at ex.net  remote public key authentication:    id: exd.ex.net  exd-0: TUNNEL, rekeying every 3600s, dpd action is clear    local:  dynamic    remote: 192.168.125.100/32  exd: TUNNEL, rekeying every 3600s, dpd action is clear    local:  dynamic    remote: 192.168.124.0/24

Please let me know if any other information is required
Thanks,Pankaj
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