https://bugs.kde.org/show_bug.cgi?id=506182
Bug ID: 506182
Summary: Sending files does not work in NAT64 networks
Classification: Applications
Product: kdeconnect
Version First 25.04.2
Reported In:
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: common
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
SUMMARY
Sharing a file via kdeconnect on a NAT64 network where the phone supports NAT64
and the laptop not never finishes.
STEPS TO REPRODUCE
1. Join a NAT64 network
2. Pair a Laptop and a Phone in kdeconnect
3. Try sharing a file from the phone to the laptop
4. The notification appears but the file is never send
OBSERVED RESULT
After the notification nothing happens. strace shows the following:
```
[pid 9509] ppoll([{fd=5, events=POLLIN}, {fd=20, events=POLLIN}, {fd=21,
events=POLLIN}, {fd=22, events=POLLIN}, {fd=23, events=POLLIN}, {fd=24,
events=POLLIN}, {fd=25, events=POLLIN}, {fd=26, events=POLLIN}, {fd=27,
events=POLLIN}, {fd=28, events=POLLIN}, {fd=29, events=POLLIN}, {fd=30,
events=POLLIN}, {fd=31, events=POLLIN}, {fd=32, events=POLLIN}, {fd=33,
events=POLLIN}, {fd=34, events=POLLIN}, {fd=35, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=39, events=POLLIN}, {fd=40, events=POLLIN}, {fd=42,
events=POLLIN}, {fd=43, events=POLLIN}, {fd=50, events=POLLOUT}, {fd=54,
events=POLLIN}], 24, {tv_sec=0, tv_nsec=0}, NULL, 8) = 2 ([{fd=5,
revents=POLLIN}, {fd=50, revents=POLLOUT|POLLERR|POLLHUP}], left {tv_sec=0,
tv_nsec=0})
[pid 9509] read(5, "\3\0\0\0\0\0\0\0", 8) = 8
[pid 9509] write(5, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 9509] connect(50, {sa_family=AF_INET6, sin6_port=htons(1739),
sin6_flowinfo=htonl(0), inet_pton(AF_INET6, "::ffff:172.20.72.12", &sin6_addr),
sin6_scope_id=0}, 28) = -1 ECONNREFUSED (Connection refused)
[pid 9509] write(5, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 9509] close(50) = 0
[pid 9509] socket(AF_INET6, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
IPPROTO_IP) = 50
[pid 9509] setsockopt(50, SOL_SOCKET, SO_OOBINLINE, [1], 4) = 0
[pid 9509] connect(50, {sa_family=AF_INET6, sin6_port=htons(1739),
sin6_flowinfo=htonl(0), inet_pton(AF_INET6, "::ffff:172.20.72.12", &sin6_addr),
sin6_scope_id=0}, 28) = -1 EINPROGRESS (Operation now in progress)
[pid 9509] write(5, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 9509] write(5, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 9509] write(4, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 9510] <... ppoll resumed>) = 1 ([{fd=4, revents=POLLIN}])
[pid 9510] read(4, <unfinished ...>
[pid 9509] newfstatat(AT_FDCWD, "/etc/localtime", <unfinished ...>
[pid 9510] <... read resumed>"\1\0\0\0\0\0\0\0", 8) = 8
```
172.20.72.12 is the IP of the device doing NAT64 using jool. kdeconnect should
probably communicate that the laptop should use IPv6 if the phone uses nat64 or
general prefer IPv6 if available.
EXPECTED RESULT
File to be shared
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: NixOS unstable
KDE Plasma Version: 6.4.0
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.0
ADDITIONAL INFORMATION
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