Passing through USB serial to bhyve VM

[Stefan Bethke]

It’s been a while since I last dealt with serial devices. Apparently, when passing through a serial device on the host to a COM port in the VM, CTS/RTS are not (correctly) passed through. With
    set ctsrts off
in ppp.conf I could get ppp to dial successfully.


Stefan

> Am 11.07.2018 um 19:22 schrieb Stefan Bethke <stb at lassitu.de>:
> 
> I’m trying to access a Huawei USB LTE stick from a Bhyve VM like so:
> # cat /var/vm/mgmt/mgmt.conf 
> loader="bhyveload"
> cpu=1
> memory=256M
> network0_type="virtio-net"
> network0_switch="lan"
> disk0_type="virtio-blk"
> disk0_name="disk0"
> disk0_dev="sparse-zvol"
> uuid="53854567-8358-11e8-9638-000db94be2cc"
> network0_mac="58:9c:fc:04:1d:52"
> bhyve_options="-lcom2,/dev/cuaU0“
> 
> On the host, I can connect ppp(8), but inside the VM, ppp(8) appears not to be able to talk to the USB device. Using cu(1), I can talk to it just fine though. I’m not sure how to debug this further. Is this supposed to just work, or am I missing some obvious configuration bit?
> 
> [root at mgmt ~]# cu -l cuau1 -s 115200
> Connected
> ATZ
> OK
> ATI
> Manufacturer: huawei
> Model: E3272
> Revision: 22.436.07.02.1202
> IMEI: 867503015nnnnnn
> +GCAP: +CGSM,+DS,+ES
> 
> OK
> ~
> [EOT]
> [root at mgmt ~]# ppp
> Working in interactive mode
> Using interface: tun0
> Phase: PPP Started (interactive mode).
> ppp ON mgmt> dial
> Phase: bundle: Establish
> Phase: deflink: closed -> opening
> Phase: deflink: Connected!
> Phase: deflink: opening -> dial
> Chat: deflink: Dial attempt 1 of 1
> ppp ON mgmt> Chat: Send: ATZ
> Chat: Expect(5): OK
> Chat: Expect timeout
> Chat: Send: ATZ
> Chat: Expect(5): OK
> Chat: Expect timeout
> Warning: Chat script failed
> Phase: deflink: dial -> hangup
> Phase: deflink: Disconnected!
> Phase: deflink: Connect time: 11 secs: 0 octets in, 0 octets out
> Phase: deflink: 0 packets in, 0 packets out
> Phase:  total 0 bytes/sec, peak 0 bytes/sec on Wed Jul 11 21:14:43 2018
> Phase: deflink: hangup -> closed
> Phase: bundle: Dead
> ppp ON mgmt> quit
> [root at mgmt ~]# cat /etc/ppp/ppp.conf
> default:
>    enable dns
>    set log local LCP IPCP Phase Chat
> 	set log all
>    set timeout 0
>    ident UMTS
>    set authname eplus
>    set authkey internet
>    set cd off
>    set device /dev/cuau1
>    set speed 115200
>    set dial "ABORT BUSY ABORT NO\\sCARRIER \
>        ABORT VOICE ABORT NO\\sDIALTONE ABORT NO\\sDIAL\\sTONE ABORT ERROR \
>        ABORT NO\\sANSWER ABORT DELAYED TIMEOUT 5 \
>        \"\" ATZ OK-ATZ-OK \
>        AT+CFUN=1 OK \
>        AT+CREG? OK \
>        AT+COPS? OK \
>        AT+CSQ OK \
> 	AT^HCSQ? OK \
>        AT+cgdcont=1,\\\"IP\\\",\\\"internet.eplus.de\\\" OK \
>        ATDT*99***1# CONNECT"
>    set ifaddr 10.0.0.1/0 10.0.0.2/0 255.255.255.0 0.0.0.0
>    add default HISADDR
> 
> 
> Stefan
> 
> -- 
> Stefan Bethke <stb at lassitu.de>   Fon +49 151 14070811
> 
> 
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-- 
Stefan Bethke <stb at lassitu.de>   Fon +49 151 14070811