When we enable/disable exit mode on this restarts the unbound DNS
responder with the DNS trampoline (or restores upstream, when disabling)
to properly route DNS requests through the tunnel (because libunbound's
direct requests don't get tunneled because unbound is inside the network
extension).
The reason the dns fix on android didn't work is that the DnsInterceptor
had a reversed to/from argument order for its
`SendServerMessageBufferTo` overload, and so android/mac needed the
to/from to be reversed so that the second reverse cancelled out the
first one.
Upon review, the DnsInterceptor order (to, from) is more intuitive than
the base order (from, to), so this reapplies the dns fix and swaps
everything *except* DnsInterceptor to match the (to, from) argument
order.
This reverts commit dace0224ec.
This reportedly didn't fix things on Android, and most definitely breaks
macOS (with this we get a bunch of errors about expecting inbound when
we have outbound).
* make it so that we don't set up unbound resolver when we have no resolvers provided by config
* clean up dns codepath and make it use llarp::SockAddr instead of llarp::IpAddress
* add option to persist address mappings between restarts using [network]:persist-addrmap-file
* make it work
* only persist address map for inbound convos
* turn persisting address map on by default
* dont load addrmap file if it has been modified last over a minute ago to prevent foot cannons fired from loading a really old version of it
so it doesn't time out and get into a state that's totally screwed.
add virtual function service::Endpont::DefaultPathAlignmentTimeout() to get the timeout for path alignment
and use it for resetablishing outbound sessions
adds [network] section parameter called path-alignment-timeout that allows configring the timeout
for optional name lookup + introset lookup + aligned path build, used by tun endpoint dns, provided
as milliseconds.
Wires up systemd support to configure DNS on startup and when
enabling/disabling exit mode.
On startup (and when turning off an exit) we tell systemd-resolved to
direct .loki and .snode lookups to lokinet (leaving other DNS traffic
alone).
On exit enabling, we reconfigure it to resolve "." (i.e. the root DNS
domain) so that all lookups come into it.
* add srv records in RCs if we have any
* add mechanism to add SRV records for plainquic exposed ports
* resign and republish rc or introset on srv record changes
* add lokinet_add_bootstrap_rc function for adding an rc from memory
* prevent stack overflow on error closing connection in quic
* add in memory nodedb
* refactor how convotags are set as active
* add initial stubs for endpoint statistics
* refactor time stuff to be a bit cleaner
* update lnproxy script with more arguments
* wire up last of the quic stuff
* clean up udp packet generation code
* pass EndpointBase not quic tunnel for quic stuff
* add {n,h}uint16_t::FromString
* add nuint_t::FromString
* make AlignedBuffer::IsZero non constant time call for speed
Refactors how quic packets get handled: the actual tunnels now live in
tunnel.hpp's TunnelManager which holds and manages all the quic<->tcp
tunnelling. service::Endpoint now holds a TunnelManager rather than a
quic::Server. We only need one quic server, but we need a separate quic
client instance per outgoing quic tunnel, and TunnelManager handles all
that glue now.
Adds QUIC packet handling to get to the right tunnel code. This
required multiplexing incoming quic packets, as follows:
Adds a very small quic tunnel packet header of 4 bytes:
[1, SPORT, ECN] for client->server packets, where SPORT is our
source "port" (really: just a uint16_t unique quic instance
identifier)
or
[2, DPORT, ECN] for server->client packets where the DPORT is the SPORT
from above.
(This also reworks ECN bits to get properly carried over lokinet.)
We don't need a destination/source port for the server-side because
there is only ever one quic server (and we know we're going to it when
the first byte of the header is 1).
Removes the config option for quic exposing ports; a full lokinet will
simply accept anything incoming on quic and tunnel it to the requested
port on the the local endpoint IP (this handler will come in a following
commit).
Replace ConvoTags with full addresses: we need to carry the port, as
well, which the ConvoTag can't give us, so change those to more general
SockAddrs from which we can extract both the ConvoTag *and* the port.
Add a pending connection queue along with new quic-side handlers to call
when a stream becomes available (TunnelManager uses this to wire up
pending incoming conns with quic streams as streams open up).
Completely get rid of tunnel_server/tunnel_client.cpp code; it is now
moved to tunnel.hpp.
Add listen()/forget() methods in TunnelManager for setting up quic
listening sockets (for liblokinet usage).
Add open()/close() methods in TunnelManager for spinning up new quic
clients for outgoing quic connections.
* add ip6-range option to network section to control which range we want to use for ipv6 traffic
* make ip6-range able to disable ipv6 exits ( i dont like this but eh )
- Make SockAddr endian arguments explicit
- Consolidate port-less contructors and port constructors into one with
a default port of 0.
- Add {h,n}uint128_t ctors for construction from IPv6 addrs
All #ifndef guards on headers have been removed, I think,
in favor of #pragma once
Headers are now included as `#include "filename"` if the included file
resides in the same directory as the file including it, or any
subdirectory therein. Otherwise they are included as
`#include <project/top/dir/relative/path/filename>`
The above does not include system/os headers.
loop->call(...) is similar to the old logic->Call(...), but is smart
about the current thread: if called from within the event loop it simply
runs the argument directly, otherwise it queues it.
Similarly most of the other event loop calls are also now thread-aware:
for example, `call_later(...)` can queue the job directly when called if
in the event loop rather than having to double-queue through the even
loop (once to call, then inside the call to initiate the time).
- removes all the llarp_ev_* functions, replacing with methods/classes/functions in the llarp
namespace.
- banish ev/ev.h to the void
- Passes various things by const lvalue ref, especially shared_ptr's that don't need to be copied
(to avoid an atomic refcount increment/decrement).
- Add a llarp::UDPHandle abstract class for UDP handling
- Removes the UDP tick handler; code that needs tick can just do a separate handler on the event
loop outside the UDP socket.
- Adds an "OwnedBuffer" which owns its own memory but is implicitly convertible to a llarp_buffer_t.
This is mostly needed to take over ownership of buffers from uvw without copying them as,
currently, uvw does its own allocation (pending some open upstream issues/PRs).
- Logic:
- add `make_caller`/`call_forever`/`call_every` utility functions to abstract Call wrapping and
dependent timed tasks.
- Add inLogicThread() so that code can tell its inside the logic thread (typically for
debugging assertions).
- get rid of janky integer returns and dealing with cancellations on call_later: the other methods
added here and the event loop code remove the need for them.
- Event loop:
- redo everything with uvw instead of libuv
- rename EventLoopWakeup::Wakeup to EventLoopWakeup::Trigger to better reflect what it does.
- add EventLoopRepeater for repeated events, and replace the code that reschedules itself every
time it is called with a repeater.
- Split up `EventLoop::run()` into a non-virtual base method and abstract `run_loop()` methods;
the base method does a couple extra setup/teardown things that don't need to be in the derived class.
- udp_listen is replaced with ev->udp(...) which returns a new UDPHandle object rather that
needing gross C-style-but-not-actually-C-compatible structs.
- Remove unused register_poll_fd_(un)readable
- Use shared_ptr for EventLoopWakeup rather than returning a raw pointer; uvw lets us not have to
worry about having the event loop class maintain ownership of it.
- Add factory EventLoop::create() function to create a default (uvw-based) event loop (previously
this was one of the llarp_ev_blahblah unnamespaced functions).
- ev_libuv: this is mostly rewritten; all of the glue code/structs, in particular, are gone as
they are no longer needed with uvw.
- DNS:
- Rename DnsHandler to DnsInterceptor to better describe what it does (this is the code that
intercepts all DNS to the tun IP range for Android).
- endpoint:
- remove unused "isolated network" code
- remove distinct (but actually always the same) variables for router/endpoint logic objects
- llarp_buffer_t
- make constructors type-safe against being called with points to non-size-1 values
- tun packet reading:
- read all available packets off the device/file descriptor; previously we were reading one packet
at a time then returning to the event loop to poll again.
- ReadNextPacket() now returns a 0-size packet if the read would block (so that we can implement
the previous point).
- ReadNextPacket() now throws on I/O error
- Miscellaneous code cleanups/simplifications
- Previous android java and jni code updated to work, but with much love
still needed to make it work nicely, e.g. handling when the VPN is
turned off.
- DNS handling refactored to allow android to intercept and handle DNS
requests as we can't set the system DNS to use a high port
(and apparently Chrome ignores system DNS settings anyway)
- add packet router structure to allow separate handling of specific
intercepted traffic, e.g. UDP traffic to port 53 gets handled by our
DNS handler rather than being naively forwarded as exit traffic.
- For now, android lokinet is exit-only and hard-coded to use exit.loki
as its exit. The exit will be configurable before release, but
allowing to not use exit-only mode is more of a challenge.
- some old gitignore remnants which were matching to things we don't
want them to (and are no longer relevant) removed
- some minor changes to CI configuration
* partial tun code refactor
* take out the trash
* move vpn platform code into llarp/vpn/platform.cpp
* fix hive build
* fix win32
* fix memory leak on win32
* reduce cpu use
* make macos compile
* win32 patches:
* use wepoll for zmq
* use all cores on windows iocp read loop
* fix zmq patch for windows
* clean up cmake for win32
* add uninstall before reinstall option to win32 installer
* more ipv6 stuff
* make it compile
* fix up route poker
* remove an unneeded code block in macos wtf
* always use call to system
* fix route poker behavior on macos
* disable ipv6 on windows for now
* cpu perf improvement:
* colease calls to Router::PumpLL to 1 per event loop wakeup
* set up THEN add addresses
* emulate proactor event loop on win32
* remove excessively verbose error message
* fix issue #1499
* exclude uv_poll from win32 so that it can start up
* update logtag to include directory
* create minidump on windows if there was a crash
* make windows happy
* use dmp suffix on minidump files
* typo fix
* address feedback from jason
* use PROJECT_SOURCE_DIR instead of CMAKE_SOURCE_DIR
* quote $@ in apply-patches in case path has spaces in it
* address feedback from tom
* remove llarp/ev/pipe
* add comments for clairification
* make event loop queue size constant named
* add exit.localhost.loki cname record
* return cname in localhost.loki A/AAAA lookup reply
* correctly handle case where we have no exit
* typofix
* simplify logic