Omcproxy crashes in loop

[guillomep]

Hello,

I was using mcproxy in order to proxy broadcast between IOT network (br-lan.30) and LAN network (br-lan.10). I am using the proxy for SSPD in DLNA (on 239.255.255.250:1900)
Since I am on OpenWrt SNAPSHOT, when I tried to update my system I discovered that mcproxy was not available anymore. So I decide to migrate to omcproxy. I have configured omcproxy but it crashes in loop and stop.

This was my old mcproxy configuration:

# Use your own MCProxy config file
config mcproxy 'mcproxy_file'
	option disabled '1'
	option respawn '1'
	option file '/etc/mcproxy.conf'

# Use OpenWrt UCI config
config mcproxy 'mcproxy'
	option disabled '0'
	option respawn '1'
	option protocol 'IGMPv3'

###########################################

config instance
	option disabled '0'
	option name 'proxy1'
	list upstream 'br-lan.30'
	list downstream 'br-lan.10'

config instance
	option disabled '0'
	option name 'proxy2'
	list upstream 'br-lan.10'
	list downstream 'br-lan.30'

This was my omcproxy configuration:

config proxy
	option uplink 'IOT'
	option downlink 'lan'

config proxy
	option uplink 'lan'
	option downlink 'IOT'

These are the errors messages

Thu Oct 31 09:27:07 2024 kern.info kernel: [ 4961.012082] br-lan.30: entered allmulticast mode
Thu Oct 31 09:27:07 2024 kern.info kernel: [ 4961.016712] br-lan: entered allmulticast mode
Thu Oct 31 09:27:07 2024 kern.info kernel: [ 4961.021335] br-lan.10: entered allmulticast mode
Thu Oct 31 09:27:07 2024 kern.info kernel: [ 4961.026155] br-lan.30: left allmulticast mode
Thu Oct 31 09:27:07 2024 kern.info kernel: [ 4961.030505] br-lan.10: left allmulticast mode
Thu Oct 31 09:27:07 2024 kern.info kernel: [ 4961.034860] br-lan: left allmulticast mode
Thu Oct 31 09:27:07 2024 daemon.info procd: Instance omcproxy::instance1 s in a crash loop 7 crashes, 1 seconds since last crash

What am I missing ? Also I tried to only use the first proxy but I never get the result back so it doesn't work.

If I tried to run omcproxy manually I get a segmentation fault

root@OpenWrt:~# /usr/sbin/omcproxy -v "br-lan.30,br-lan.10" "br-lan.10,br-lan.30"
Segmentation fault

[guillomep]

Okay, so there is a bug in omcproxy that causes the segmentation fault. It has been fixed in this PR https://github.com/openwrt/omcproxy/pull/10

I tried it and it works. But seems the project seems dead, I instead use smcroute.

I follow the instructions here [How To] Cast to a LG TV in another VLAN with fw4 (ssdp and a bit of mdns)

The only change between smcroute and mcproxy is that I had to add a rule in firewall to increase the ttl of the broadcast packages.

Hope this help