Commit Graph

32 Commits

Author SHA1 Message Date
Josh Bleecher Snyder 334c09ab19 comment more 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 3e6e5a2eee incorporate recvOut into recvReqs 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 6ec3378f7b remove more dead code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 385f86e85f document, cull dead code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 52ccff8835 WIP: clean shutdown for UDP conn
this appears to work, most of the time.
there's lots of documentation work remaining,
thinking through the structure remaining,
testing remaining,
porting to file remaining (if appropriate).
2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 2118b821cd remove dead code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 1e3e5fd8e7 overhaul error handling of peek/waitcompletion 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder e0d8dcf3eb refactor 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder c1bc58defc set sin_family (oops) 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 7cb1369b19 remove some TODOs, make ip address extraction equally awful 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder f274a0cfab simplify change point
at the cost of some very, very naughty unsafe
2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder f71ff18c11 convert manual tests into automated tests 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder f27a61502d start cleaning up code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder a98ed81f2e ipv6 support, UNTESTED, super hacky 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 275cb37031 comments 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 9559752cb5 fix io_uring tun device reads
Well that's an interesting one!
Apparently if you issue multiple concurrent preadv calls on
a TUN device using io_uring, the TUN device falls over.

Possibly corrupting memory along the way.
Which might be why the kernel hung on shutdown...
2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder b05f305eaf simpler init 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder e337ed2033 stick closer to upstream tun reading code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 0fb656794c make cgo pointer rules happy
well that was a mess
2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 283614d5e9 use io_uring for sendmsg
and clean up some dead code and unify some things
2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 11036e23a1 disable polling for now
we'll maybe bring it back with a token bucket or something.
and/or do multi-sqe submission.
2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 522fa9306e they work with extra junk
thanks, dave
no thanks, kernel devs

write no work
use writev
2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 7fd5e31070 tun writes...not working yet (but why not??) 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder a03ee93e21 use polling instead of syscall 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 56ba714e10 smush together two return values from C
avoids a per-packet alloc

i will atone for my sins later

if only C let you return multiple values.
or Go let you pass in a pointer w/o it being on the heap.
2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder bb78cf81b6 keep 8 requests in the queue at all times 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 38a872d2c1 remove all allocs 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 6ef301e787 remove all allocations 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 48e338130e mve sockaddr_in to Go 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 56ece41326 move iovec to go 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder f75d32151b move msghdr to Go 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder fcdc9086a2 use io_uring 2021-07-13 15:15:16 -07:00