Udp

common/network/webudp/WuStun.h

@@ -0,0 +1,57 @@
+#pragma once
+
+#include "WuBufferOp.h"
+#include "WuString.h"
+
+const int32_t kMaxStunIdentifierLength = 128;
+const int32_t kStunTransactionIdLength = 12;
+const uint32_t kStunCookie = 0x2112a442;
+const uint16_t kStunXorMagic = 0x2112;
+
+struct StunUserIdentifier {
+  uint8_t identifier[kMaxStunIdentifierLength];
+  int32_t length;
+};
+
+enum StunAddressFamily { Stun_IPV4 = 0x01, Stun_IPV6 = 0x02 };
+
+enum StunType { Stun_BindingRequest = 0x0001, Stun_SuccessResponse = 0x0101 };
+
+enum StunAttributeType {
+  StunAttrib_User = 0x06,
+  StunAttrib_MessageIntegrity = 0x08,
+  StunAttrib_XorMappedAddress = 0x20,
+  StunAttrib_Fingerprint = 0x8028
+};
+
+struct StunAddress {
+  uint8_t family;
+  uint16_t port;
+
+  union {
+    uint32_t ipv4;
+    uint8_t ipv6[16];
+  } address;
+};
+
+inline bool StunUserIdentifierEqual(const StunUserIdentifier* a,
+                                    const StunUserIdentifier* b) {
+  return MemEqual(a->identifier, a->length, b->identifier, b->length);
+}
+
+struct StunPacket {
+  uint16_t type;
+  uint16_t length;
+  uint32_t cookie;
+  uint8_t transactionId[kStunTransactionIdLength];
+
+  StunUserIdentifier remoteUser;
+  StunUserIdentifier serverUser;
+
+  StunAddress xorMappedAddress;
+};
+
+bool ParseStun(const uint8_t* src, int32_t len, StunPacket* packet);
+
+int32_t SerializeStunPacket(const StunPacket* packet, const uint8_t* password,
+                            int32_t passwordLen, uint8_t* dest, int32_t len);