Add support for setting TypeOfService/TrafficClass on connections

[anrossi]

Description

Resolves #4767. Add support for applications to set the Type of Service/Traffic Class field all traffic sent from a connection.

Testing

Updated

Documentation

Updated the settings document with the new get/set param.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.97%. Comparing base (451c1a8) to head (4d0a580).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4757      +/-   ##
==========================================
- Coverage   87.00%   85.97%   -1.04%     
==========================================
  Files          56       56              
  Lines       17400    17422      +22     
==========================================
- Hits        15139    14978     -161     
- Misses       2261     2444     +183     

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[nibanks]

Cargo needs to be updated.

diff --git a/src/ffi/linux_bindings.rs b/src/ffi/linux_bindings.rs
index bca39d7..3[5](https://github.com/microsoft/msquic/actions/runs/13151014603/job/36698324675?pr=4757#step:12:6)b5a86 100644
--- a/src/ffi/linux_bindings.rs
+++ b/src/ffi/linux_bindings.rs
@@ -199,[6](https://github.com/microsoft/msquic/actions/runs/13151014603/job/36698324675?pr=4757#step:12:7) +199,7 @@ pub const QUIC_PARAM_CONN_TLS_SECRETS: u32 = 83886099;
 pub const QUIC_PARAM_CONN_STATISTICS_V2: u32 = 83886102;
 pub const QUIC_PARAM_CONN_STATISTICS_V2_PLAT: u32 = 83886103;
 pub const QUIC_PARAM_CONN_ORIG_DEST_CID: u32 = 83886104;
+pub const QUIC_PARAM_CONN_SEND_DSCP: u32 = 83886105;
 pub const QUIC_PARAM_TLS_HANDSHAKE_INFO: u32 = 100663296;
 pub const QUIC_PARAM_TLS_NEGOTIATED_ALPN: u32 = 10066329[7](https://github.com/microsoft/msquic/actions/runs/13151014603/job/36698324675?pr=4757#step:12:8);
 pub const QUIC_PARAM_STREAM_ID: u32 = 13421772[8](https://github.com/microsoft/msquic/actions/runs/13151014603/job/36698324675?pr=4757#step:12:9);

and

diff --git a/src/ffi/win_bindings.rs b/src/ffi/win_bindings.rs
index aa[7](https://github.com/microsoft/msquic/actions/runs/13151014603/job/36698342087?pr=4757#step:12:8)b544..df218d8 100644
--- a/src/ffi/win_bindings.rs
+++ b/src/ffi/win_bindings.rs
@@ -193,6 +193,7 @@ pub const QUIC_PARAM_CONN_TLS_SECRETS: u32 = [8](https://github.com/microsoft/msquic/actions/runs/13151014603/job/36698342087?pr=4757#step:12:9)3886099;
 pub const QUIC_PARAM_CONN_STATISTICS_V2: u32 = 83886102;
 pub const QUIC_PARAM_CONN_STATISTICS_V2_PLAT: u32 = 83886103;
 pub const QUIC_PARAM_CONN_ORIG_DEST_CID: u32 = 83886104;
+pub const QUIC_PARAM_CONN_SEND_DSCP: u32 = 83886105;
 pub const QUIC_PARAM_TLS_HANDSHAKE_INFO: u32 = 1006632[9](https://github.com/microsoft/msquic/actions/runs/13151014603/job/36698342087?pr=4757#step:12:10)6;
 pub const QUIC_PARAM_TLS_NEGOTIATED_ALPN: u32 = [10](https://github.com/microsoft/msquic/actions/runs/13151014603/job/36698342087?pr=4757#step:12:11)0663297;
 pub const QUIC_PARAM_TLS_SCHANNEL_CONTEXT_ATTRIBUTE_W: u32 = 117440512;

[nibanks]

If the CI passes, ship it!