Commit Graph

5 Commits

Author SHA1 Message Date
Oliver Freyermuth
edf2399ce6 Add NATSymmetricUDPFirewall to punchable NATs (#5931)
NATSymmetricUDPFirewall actually is not NAT at all, but means the machine has a global IP address and an UDP firewall in front (RFC calls it Symmetric UDP Firewall). This is punchable fine, both theoretically and also practically in testing.
2019-08-06 12:26:02 +01:00
Simon Frei
4d3432af3e lib: Ensure timely service termination (fixes #5860) (#5863) 2019-07-19 19:40:40 +02:00
Aurélien Rainone
f1a7dd766e all: Add comment to ensure correct atomics alignment (fixes #5813)
Per the sync/atomic bug note:

> On ARM, x86-32, and 32-bit MIPS, it is the caller's
> responsibility to arrange for 64-bit alignment of 64-bit words
> accessed atomically. The first word in a variable or in an
> allocated struct, array, or slice can be relied upon to be
> 64-bit aligned.

All atomic accesses of 64-bit variables in syncthing code base are
currently ok (i.e they are all 64-bit aligned).

Generally, the bug is triggered because of incorrect alignement
of struct fields. Free variables (declared in a function) are
guaranteed to be 64-bit aligned by the Go compiler.

To ensure the code remains correct upon further addition/removal
of fields, which would change the currently correct alignment, I
added the following comment where required:

     // atomic, must remain 64-bit aligned

See https://golang.org/pkg/sync/atomic/#pkg-note-BUG.
2019-07-13 14:05:39 +01:00
Simon Frei
ba056578ec
lib: Add util.Service as suture.Service template (fixes #5801) (#5806) 2019-07-09 11:40:30 +02:00
Audrius Butkevicius
e714df013f lib/connections: Add QUIC protocol support (fixes #5377) (#5737) 2019-05-29 09:56:40 +02:00