添加 github.com/pion/dtls 代码

dtls-2.0.9/util.go

@@ -0,0 +1,38 @@
+package dtls
+
+func findMatchingSRTPProfile(a, b []SRTPProtectionProfile) (SRTPProtectionProfile, bool) {
+	for _, aProfile := range a {
+		for _, bProfile := range b {
+			if aProfile == bProfile {
+				return aProfile, true
+			}
+		}
+	}
+	return 0, false
+}
+
+func findMatchingCipherSuite(a, b []CipherSuite) (CipherSuite, bool) { //nolint
+	for _, aSuite := range a {
+		for _, bSuite := range b {
+			if aSuite.ID() == bSuite.ID() {
+				return aSuite, true
+			}
+		}
+	}
+	return nil, false
+}
+
+func splitBytes(bytes []byte, splitLen int) [][]byte {
+	splitBytes := make([][]byte, 0)
+	numBytes := len(bytes)
+	for i := 0; i < numBytes; i += splitLen {
+		j := i + splitLen
+		if j > numBytes {
+			j = numBytes
+		}
+
+		splitBytes = append(splitBytes, bytes[i:j])
+	}
+
+	return splitBytes
+}