2 files changed, 28 insertions, 8 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/public/dcsctp_options.h b/third_party/libwebrtc/net/dcsctp/public/dcsctp_options.h
index d19798054c..600e8a362e 100644
--- a/third_party/libwebrtc/net/dcsctp/public/dcsctp_options.h
+++ b/third_party/libwebrtc/net/dcsctp/public/dcsctp_options.h
@@ -196,14 +196,13 @@ struct DcSctpOptions {
   // Disables SCTP packet crc32 verification. For fuzzers only!
   bool disable_checksum_verification = false;
 
-  // Controls the acceptance of zero checksum, as defined in
-  // https://datatracker.ietf.org/doc/draft-tuexen-tsvwg-sctp-zero-checksum/
-  // This should only be enabled if the packet integrity can be ensured by lower
-  // layers, which DTLS will do in WebRTC, as defined by RFC8261.
-  //
-  // This will also enable sending packets without a checksum value (set to 0)
-  // once both peers have negotiated this feature.
-  bool enable_zero_checksum = false;
+  // Controls the "zero checksum option" feature, as defined in
+  // https://www.ietf.org/archive/id/draft-ietf-tsvwg-sctp-zero-checksum-06.html.
+  // To have this feature enabled, both peers must be configured to use the
+  // same (defined, not "none") alternate error detection method.
+  ZeroChecksumAlternateErrorDetectionMethod
+      zero_checksum_alternate_error_detection_method =
+          ZeroChecksumAlternateErrorDetectionMethod::None();
 };
 }  // namespace dcsctp
 
diff --git a/third_party/libwebrtc/net/dcsctp/public/types.h b/third_party/libwebrtc/net/dcsctp/public/types.h
index 02e2ce1e5e..1565cd7b58 100644
--- a/third_party/libwebrtc/net/dcsctp/public/types.h
+++ b/third_party/libwebrtc/net/dcsctp/public/types.h
@@ -151,6 +151,27 @@ class LifecycleId : public webrtc::StrongAlias<class LifecycleIdTag, uint64_t> {
 
   static constexpr LifecycleId NotSet() { return LifecycleId(0); }
 };
+
+// To enable zero checksum feature, both peers must agree on which alternate
+// error detection method that is used. See
+// https://www.ietf.org/archive/id/draft-ietf-tsvwg-sctp-zero-checksum-06.html.
+class ZeroChecksumAlternateErrorDetectionMethod
+    : public webrtc::StrongAlias<
+          class ZeroChecksumAlternateErrorDetectionMethodTag,
+          uint32_t> {
+ public:
+  constexpr explicit ZeroChecksumAlternateErrorDetectionMethod(
+      const UnderlyingType& v)
+      : webrtc::StrongAlias<class ZeroChecksumAlternateErrorDetectionMethodTag,
+                            uint32_t>(v) {}
+
+  static constexpr ZeroChecksumAlternateErrorDetectionMethod None() {
+    return ZeroChecksumAlternateErrorDetectionMethod(0);
+  }
+  static constexpr ZeroChecksumAlternateErrorDetectionMethod LowerLayerDtls() {
+    return ZeroChecksumAlternateErrorDetectionMethod(1);
+  }
+};
 }  // namespace dcsctp
 
 #endif  // NET_DCSCTP_PUBLIC_TYPES_H_