Add support for ICE-TCP

This is a massive commit that can't be split. We add ice-tcp support
into the agent by creating local host tcp-active/tcp-passive candidates.
We also need to find the local and remote candidates whenever we discover
a peer-reflexive because their data is important to setup the peer-reflexive
so a few changes were added to look for the local or remote candidate.
For TCP-ACTIVE remote peer-reflexive candidates, we can't add conncheck
pairs normally because TCP-PASSIVE (local) do not generate candidate pairs,
and we also can't have a connection from any local host, so we can only create
a single candidatepair with the local/remote that are connected.
The pair->socket of a candidate check pair will hold the connected tcp socket
(through connect for ACT or accept for PASS) and we will either have a
remote or a local peer-reflexive which will create a new candidate pair,
we cannot trigger checks on the initial candidate pair, we must only do it
on the new check pairs. but in the case of a tcp-passive, we don't get a new
local peer-reflexive candidate, so there is no new candidate with a new NiceSocket, so
when we get a triggered check, we need to match it to the candidate check pair
or when we select a pair, it will still use the original TCP-PASS socket.
We must store the new connected tcp socket in the peer reflexive candidates
since they represent that unique peer-reflx candidate's connection

1 files changed, 1 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index 20ce7e0..665be66 100644
--- a/.gitignore
+++ b/.gitignore
@@ -133,6 +133,7 @@ tests/test-build-io-stream
 tests/test-dribble
 tests/test-fallback
 tests/test-fullmode
+tests/test-icetcp
 tests/test-io-stream-cancelling
 tests/test-io-stream-closing-read
 tests/test-io-stream-closing-write