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server/vendor/github.com/pion/sctp/param_state_cookie.go

@@ -0,0 +1,49 @@
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+package sctp
+
+import (
+	"crypto/rand"
+	"fmt"
+)
+
+type paramStateCookie struct {
+	paramHeader
+	cookie []byte
+}
+
+func newRandomStateCookie() (*paramStateCookie, error) {
+	randCookie := make([]byte, 32)
+	_, err := rand.Read(randCookie)
+	// crypto/rand.Read returns n == len(b) if and only if err == nil.
+	if err != nil {
+		return nil, err
+	}
+
+	s := &paramStateCookie{
+		cookie: randCookie,
+	}
+
+	return s, nil
+}
+
+func (s *paramStateCookie) marshal() ([]byte, error) {
+	s.typ = stateCookie
+	s.raw = s.cookie
+	return s.paramHeader.marshal()
+}
+
+func (s *paramStateCookie) unmarshal(raw []byte) (param, error) {
+	err := s.paramHeader.unmarshal(raw)
+	if err != nil {
+		return nil, err
+	}
+	s.cookie = s.raw
+	return s, nil
+}
+
+// String makes paramStateCookie printable
+func (s *paramStateCookie) String() string {
+	return fmt.Sprintf("%s: %s", s.paramHeader, s.cookie)
+}