Bug 508270

Summary: network multicast and network broadcast should stay in local domain. set IPv4header field TTL=1
Product: [Plasma] plasma-mobile Reporter: Riegler Bernhard <riegler.b>
Component: generalAssignee: Plasma Mobile Bugs <plasma-mobile-bugs-null>
Status: REPORTED ---    
Severity: normal CC: carl
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Android   
OS: Android 14.x   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Riegler Bernhard 2025-08-15 06:48:20 UTC
KDEconnect v1.33.4

UDP    multicast   to IP4 255.255.255.255 dest_port 1716 sends IP.TTL=64
mDNS broadcast to IP4 224.0.0.251          dest_port 5353 sends IP.TTL=255 for _kdeconnect._udp.local


STEPS TO REPRODUCE
1. POWER on Android 16
2. enable Wi-Fi network
3. start "KDEconnect"

the frames travel Wi-Fi into the LAN-Access-Point into ethernet
I use "wireshark" on PC Linux Ubuntu 22.04LTS to trace the network. (ethernet)
I find the BEACON with UDPport 1716
I find the mDNS with UDPport 5353

EXPECTED RESULT
all multicast and broadcast should have limit TTL=1 for the IP4-Routers.