Set default IKE header initiator flag in IKEv2 only
[strongswan.git] / src / libcharon / encoding / payloads / ike_header.c
index 735f013..8f37944 100644 (file)
@@ -81,9 +81,29 @@ struct private_ike_header_t {
                 * TRUE, if this is a response, FALSE if its a Request.
                 */
                bool response;
+
+               /**
+                * TRUE, if the packet is encrypted (IKEv1).
+                */
+               bool encryption;
+
+               /**
+                * TRUE, if the commit flag is set (IKEv1).
+                */
+               bool commit;
+
+               /**
+                * TRUE, if the auth only flag is set (IKEv1).
+                */
+               bool authonly;
        } flags;
 
        /**
+        * Reserved bits of IKE header
+        */
+       bool reserved[2];
+
+       /**
         * Associated Message-ID.
         */
        u_int32_t message_id;
@@ -94,23 +114,34 @@ struct private_ike_header_t {
        u_int32_t length;
 };
 
-ENUM_BEGIN(exchange_type_names, EXCHANGE_TYPE_UNDEFINED, EXCHANGE_TYPE_UNDEFINED,
-       "EXCHANGE_TYPE_UNDEFINED");
-ENUM_NEXT(exchange_type_names, IKE_SA_INIT, INFORMATIONAL, EXCHANGE_TYPE_UNDEFINED,
+ENUM_BEGIN(exchange_type_names, ID_PROT, INFORMATIONAL_V1,
+       "ID_PROT",
+       "AUTH_ONLY",
+       "AGGRESSIVE",
+       "INFORMATIONAL_V1");
+ENUM_NEXT(exchange_type_names, QUICK_MODE, IKE_SESSION_RESUME, INFORMATIONAL_V1,
+       "QUICK_MODE",
+       "NEW_GROUP_MODE",
        "IKE_SA_INIT",
        "IKE_AUTH",
        "CREATE_CHILD_SA",
-       "INFORMATIONAL");
+       "INFORMATIONAL",
+       "IKE_SESSION_RESUME");
 #ifdef ME
-ENUM_NEXT(exchange_type_names, ME_CONNECT, ME_CONNECT, INFORMATIONAL,
+ENUM_NEXT(exchange_type_names, ME_CONNECT, ME_CONNECT, IKE_SESSION_RESUME,
        "ME_CONNECT");
-ENUM_END(exchange_type_names, ME_CONNECT);
+ENUM_NEXT(exchange_type_names, EXCHANGE_TYPE_UNDEFINED,
+                                                          EXCHANGE_TYPE_UNDEFINED, ME_CONNECT,
+       "EXCHANGE_TYPE_UNDEFINED");
 #else
-ENUM_END(exchange_type_names, INFORMATIONAL);
+ENUM_NEXT(exchange_type_names, EXCHANGE_TYPE_UNDEFINED,
+                                                          EXCHANGE_TYPE_UNDEFINED, IKE_SESSION_RESUME,
+       "EXCHANGE_TYPE_UNDEFINED");
 #endif /* ME */
+ENUM_END(exchange_type_names, EXCHANGE_TYPE_UNDEFINED);
 
 /**
- * Encoding rules to parse or generate a IKEv2-Header.
+ * Encoding rules to parse or generate a IKE-Header.
  *
  * The defined offsets are the positions in a object of type
  * ike_header_t.
@@ -119,33 +150,31 @@ encoding_rule_t ike_header_encodings[] = {
        /* 8 Byte SPI, stored in the field initiator_spi */
        { IKE_SPI,              offsetof(private_ike_header_t, initiator_spi)   },
        /* 8 Byte SPI, stored in the field responder_spi */
-       { IKE_SPI,              offsetof(private_ike_header_t, responder_spi)   },
+       { IKE_SPI,              offsetof(private_ike_header_t, responder_spi)   },
        /* 1 Byte next payload type, stored in the field next_payload */
-       { U_INT_8,              offsetof(private_ike_header_t, next_payload)    },
+       { U_INT_8,              offsetof(private_ike_header_t, next_payload)    },
        /* 4 Bit major version, stored in the field maj_version */
-       { U_INT_4,              offsetof(private_ike_header_t, maj_version)     },
+       { U_INT_4,              offsetof(private_ike_header_t, maj_version)             },
        /* 4 Bit minor version, stored in the field min_version */
-       { U_INT_4,              offsetof(private_ike_header_t, min_version)     },
+       { U_INT_4,              offsetof(private_ike_header_t, min_version)             },
        /* 8 Bit for the exchange type */
-       { U_INT_8,              offsetof(private_ike_header_t, exchange_type)   },
-       /* 2 Bit reserved bits, nowhere stored */
-       { RESERVED_BIT, 0                                                                               },
-       { RESERVED_BIT, 0                                                                               },
-       /* 3 Bit flags, stored in the fields response, version and initiator */
-       { FLAG,                 offsetof(private_ike_header_t, flags.response)  },
-       { FLAG,                 offsetof(private_ike_header_t, flags.version)   },
-       { FLAG,                 offsetof(private_ike_header_t, flags.initiator) },
-       /* 3 Bit reserved bits, nowhere stored */
-       { RESERVED_BIT, 0                                                                               },
-       { RESERVED_BIT, 0                                                                               },
-       { RESERVED_BIT, 0                                                                               },
+       { U_INT_8,              offsetof(private_ike_header_t, exchange_type)   },
+       /* 2 Bit reserved bits */
+       { RESERVED_BIT, offsetof(private_ike_header_t, reserved[0])             },
+       { RESERVED_BIT, offsetof(private_ike_header_t, reserved[1])             },
+       /* 6 flags  */
+       { FLAG,                 offsetof(private_ike_header_t, flags.response)  },
+       { FLAG,                 offsetof(private_ike_header_t, flags.version)   },
+       { FLAG,                 offsetof(private_ike_header_t, flags.initiator) },
+       { FLAG,                 offsetof(private_ike_header_t, flags.authonly)  },
+       { FLAG,                 offsetof(private_ike_header_t, flags.commit)    },
+       { FLAG,                 offsetof(private_ike_header_t, flags.encryption)},
        /* 4 Byte message id, stored in the field message_id */
-       { U_INT_32,             offsetof(private_ike_header_t, message_id)              },
+       { U_INT_32,             offsetof(private_ike_header_t, message_id)              },
        /* 4 Byte length fied, stored in the field length */
-       { HEADER_LENGTH,        offsetof(private_ike_header_t, length)                  }
+       { HEADER_LENGTH,offsetof(private_ike_header_t, length)                  },
 };
 
-
 /*                           1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
@@ -163,207 +192,238 @@ encoding_rule_t ike_header_encodings[] = {
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 */
 
-
-/**
- * Implementation of payload_t.verify.
- */
-static status_t verify(private_ike_header_t *this)
+METHOD(payload_t, verify, status_t,
+       private_ike_header_t *this)
 {
-       if ((this->exchange_type < IKE_SA_INIT) ||
-               ((this->exchange_type > INFORMATIONAL)
+       switch (this->exchange_type)
+       {
+               case ID_PROT:
+               case AGGRESSIVE:
+                       if (this->message_id != 0)
+                       {
+                               return FAILED;
+                       }
+                       /* fall */
+               case AUTH_ONLY:
+               case INFORMATIONAL_V1:
+               case QUICK_MODE:
+               case NEW_GROUP_MODE:
+                       if (this->maj_version != IKEV1_MAJOR_VERSION)
+                       {
+                               return FAILED;
+                       }
+                       break;
+               case IKE_SA_INIT:
+               case IKE_AUTH:
+               case CREATE_CHILD_SA:
+               case INFORMATIONAL:
+               case IKE_SESSION_RESUME:
 #ifdef ME
-                       && (this->exchange_type != ME_CONNECT)
+               case ME_CONNECT:
 #endif /* ME */
-               ))
-       {
-               /* unsupported exchange type */
-               return FAILED;
+                       if (this->maj_version != IKEV2_MAJOR_VERSION)
+                       {
+                               return FAILED;
+                       }
+                       break;
+               default:
+                       /* unsupported exchange type */
+                       return FAILED;
        }
-
-       if (this->initiator_spi == 0
+       if (this->initiator_spi == 0)
+       {
 #ifdef ME
-               /* we allow zero spi for INFORMATIONAL exchanges,
-                * to allow connectivity checks */
-               && this->exchange_type != INFORMATIONAL
+               if (this->exchange_type != INFORMATIONAL)
+                       /* we allow zero spi for INFORMATIONAL exchanges,
+                        * to allow connectivity checks */
 #endif /* ME */
-               )
-       {
-               /* initiator spi not set */
-               return FAILED;
+               {
+                       return FAILED;
+               }
        }
+       return SUCCESS;
+}
 
-       /* verification of version is not done in here */
+METHOD(payload_t, get_encoding_rules, void,
+       private_ike_header_t *this, encoding_rule_t **rules, size_t *rule_count)
+{
+       *rules = ike_header_encodings;
+       *rule_count = sizeof(ike_header_encodings) / sizeof(encoding_rule_t);
+}
 
-       return SUCCESS;
+METHOD(payload_t, get_type, payload_type_t,
+       private_ike_header_t *this)
+{
+       return HEADER;
 }
 
-/**
- * Implementation of payload_t.set_next_type.
- */
-static void set_next_type(payload_t *this,payload_type_t type)
+METHOD(payload_t, get_next_type, payload_type_t,
+       private_ike_header_t *this)
 {
-       ((private_ike_header_t *)this)->next_payload = type;
+       return this->next_payload;
 }
-/**
- * Implementation of ike_header_t.get_initiator_spi.
- */
-static u_int64_t get_initiator_spi(private_ike_header_t *this)
+
+METHOD(payload_t, set_next_type, void,
+       private_ike_header_t *this, payload_type_t type)
+{
+       this->next_payload = type;
+}
+
+METHOD(payload_t, get_length, size_t,
+       private_ike_header_t *this)
+{
+       return this->length;
+}
+
+METHOD(ike_header_t, get_initiator_spi, u_int64_t,
+       private_ike_header_t *this)
 {
        return this->initiator_spi;
 }
 
-/**
- * Implementation of ike_header_t.set_initiator_spi.
- */
-static void set_initiator_spi(private_ike_header_t *this, u_int64_t initiator_spi)
+METHOD(ike_header_t, set_initiator_spi, void,
+       private_ike_header_t *this, u_int64_t initiator_spi)
 {
        this->initiator_spi = initiator_spi;
 }
 
-/**
- * Implementation of ike_header_t.get_responder_spi.
- */
-static u_int64_t get_responder_spi(private_ike_header_t *this)
+METHOD(ike_header_t, get_responder_spi, u_int64_t,
+       private_ike_header_t *this)
 {
        return this->responder_spi;
 }
 
-/**
- * Implementation of ike_header_t.set_responder_spi.
- */
-static void set_responder_spi(private_ike_header_t *this, u_int64_t responder_spi)
+METHOD(ike_header_t, set_responder_spi, void,
+       private_ike_header_t *this, u_int64_t responder_spi)
 {
        this->responder_spi = responder_spi;
 }
 
-/**
- * Implementation of ike_header_t.get_maj_version.
- */
-static u_int8_t get_maj_version(private_ike_header_t *this)
+METHOD(ike_header_t, get_maj_version, u_int8_t,
+       private_ike_header_t *this)
 {
        return this->maj_version;
 }
 
-/**
- * Implementation of ike_header_t.get_min_version.
- */
-static u_int8_t get_min_version(private_ike_header_t *this)
+METHOD(ike_header_t, set_maj_version, void,
+       private_ike_header_t *this, u_int8_t major)
+{
+       this->maj_version = major;
+}
+
+METHOD(ike_header_t, get_min_version, u_int8_t,
+       private_ike_header_t *this)
 {
        return this->min_version;
 }
 
-/**
- * Implementation of ike_header_t.get_response_flag.
- */
-static bool get_response_flag(private_ike_header_t *this)
+METHOD(ike_header_t, set_min_version, void,
+       private_ike_header_t *this, u_int8_t minor)
+{
+       this->min_version = minor;
+}
+
+METHOD(ike_header_t, get_response_flag, bool,
+       private_ike_header_t *this)
 {
        return this->flags.response;
 }
 
-/**
- * Implementation of ike_header_t.set_response_flag.
- */
-static void set_response_flag(private_ike_header_t *this, bool response)
+METHOD(ike_header_t, set_response_flag, void,
+       private_ike_header_t *this, bool response)
 {
        this->flags.response = response;
 }
 
-/**
- * Implementation of ike_header_t.get_version_flag.
- */
-static bool get_version_flag(private_ike_header_t *this)
+METHOD(ike_header_t, get_version_flag, bool,
+       private_ike_header_t *this)
 {
        return this->flags.version;
 }
 
-/**
- * Implementation of ike_header_t.get_initiator_flag.
- */
-static bool get_initiator_flag(private_ike_header_t *this)
+METHOD(ike_header_t, set_version_flag, void,
+       private_ike_header_t *this, bool version)
+{
+       this->flags.version = version;
+}
+
+METHOD(ike_header_t, get_initiator_flag, bool,
+       private_ike_header_t *this)
 {
        return this->flags.initiator;
 }
 
-/**
- * Implementation of ike_header_t.set_initiator_flag.
- */
-static void set_initiator_flag(private_ike_header_t *this, bool initiator)
+METHOD(ike_header_t, set_initiator_flag, void,
+       private_ike_header_t *this, bool initiator)
 {
        this->flags.initiator = initiator;
 }
 
-/**
- * Implementation of ike_header_t.get_exchange_type.
- */
-static u_int8_t get_exchange_type(private_ike_header_t *this)
+METHOD(ike_header_t, get_encryption_flag, bool,
+       private_ike_header_t *this)
 {
-       return this->exchange_type;
+       return this->flags.encryption;
 }
 
-/**
- * Implementation of ike_header_t.set_exchange_type.
- */
-static void set_exchange_type(private_ike_header_t *this, u_int8_t exchange_type)
+METHOD(ike_header_t, set_encryption_flag, void,
+       private_ike_header_t *this, bool encryption)
 {
-       this->exchange_type = exchange_type;
+       this->flags.encryption = encryption;
 }
 
-/**
- * Implements ike_header_t's get_message_id function.
- * See #ike_header_t.get_message_id  for description.
- */
-static u_int32_t get_message_id(private_ike_header_t *this)
+
+METHOD(ike_header_t, get_commit_flag, bool,
+       private_ike_header_t *this)
 {
-       return this->message_id;
+       return this->flags.commit;
 }
 
-/**
- * Implementation of ike_header_t.set_message_id.
- */
-static void set_message_id(private_ike_header_t *this, u_int32_t message_id)
+METHOD(ike_header_t, set_commit_flag, void,
+       private_ike_header_t *this, bool commit)
 {
-       this->message_id = message_id;
+       this->flags.commit = commit;
 }
 
-/**
- * Implementation of ike_header_t.destroy and payload_t.destroy.
- */
-static void destroy(ike_header_t *this)
+METHOD(ike_header_t, get_authonly_flag, bool,
+       private_ike_header_t *this)
 {
-       free(this);
+       return this->flags.authonly;
 }
 
-/**
- * Implementation of payload_t.get_encoding_rules.
- */
-static void get_encoding_rules(payload_t *this, encoding_rule_t **rules, size_t *rule_count)
+METHOD(ike_header_t, set_authonly_flag, void,
+       private_ike_header_t *this, bool authonly)
 {
-       *rules = ike_header_encodings;
-       *rule_count = sizeof(ike_header_encodings) / sizeof(encoding_rule_t);
+       this->flags.authonly = authonly;
 }
 
-/**
- * Implementation of payload_t.get_type.
- */
-static payload_type_t get_type(payload_t *this)
+METHOD(ike_header_t, get_exchange_type, u_int8_t,
+       private_ike_header_t *this)
 {
-       return HEADER;
+       return this->exchange_type;
 }
 
-/**
- * Implementation of payload_t.get_next_type.
- */
-static payload_type_t get_next_type(payload_t *this)
+METHOD(ike_header_t, set_exchange_type, void,
+       private_ike_header_t *this, u_int8_t exchange_type)
 {
-       return (((private_ike_header_t*)this)->next_payload);
+       this->exchange_type = exchange_type;
 }
 
-/**
- * Implementation of payload_t.get_length.
- */
-static size_t get_length(payload_t *this)
+METHOD(ike_header_t, get_message_id, u_int32_t,
+       private_ike_header_t *this)
+{
+       return this->message_id;
+}
+
+METHOD(ike_header_t, set_message_id, void,
+       private_ike_header_t *this, u_int32_t message_id)
 {
-       return (((private_ike_header_t*)this)->length);
+       this->message_id = message_id;
+}
+
+METHOD2(payload_t, ike_header_t, destroy, void,
+       private_ike_header_t *this)
+{
+       free(this);
 }
 
 /*
@@ -371,45 +431,65 @@ static size_t get_length(payload_t *this)
  */
 ike_header_t *ike_header_create()
 {
-       private_ike_header_t *this = malloc_thing(private_ike_header_t);
-
-       this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
-       this->public.payload_interface.get_encoding_rules = get_encoding_rules;
-       this->public.payload_interface.get_length = get_length;
-       this->public.payload_interface.get_next_type = get_next_type;
-       this->public.payload_interface.set_next_type = set_next_type;
-       this->public.payload_interface.get_type = get_type;
-       this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
-       this->public.destroy = destroy;
-
-       this->public.get_initiator_spi = (u_int64_t (*) (ike_header_t*))get_initiator_spi;
-       this->public.set_initiator_spi = (void (*) (ike_header_t*,u_int64_t))set_initiator_spi;
-       this->public.get_responder_spi = (u_int64_t (*) (ike_header_t*))get_responder_spi;
-       this->public.set_responder_spi = (void (*) (ike_header_t *,u_int64_t))set_responder_spi;
-       this->public.get_maj_version = (u_int8_t (*) (ike_header_t*))get_maj_version;
-       this->public.get_min_version = (u_int8_t (*) (ike_header_t*))get_min_version;
-       this->public.get_response_flag = (bool (*) (ike_header_t*))get_response_flag;
-       this->public.set_response_flag = (void (*) (ike_header_t*,bool))set_response_flag;
-       this->public.get_version_flag = (bool (*) (ike_header_t*))get_version_flag;
-       this->public.get_initiator_flag = (bool (*) (ike_header_t*))get_initiator_flag;
-       this->public.set_initiator_flag = (void (*) (ike_header_t*,bool))set_initiator_flag;
-       this->public.get_exchange_type = (u_int8_t (*) (ike_header_t*))get_exchange_type;
-       this->public.set_exchange_type = (void (*) (ike_header_t*,u_int8_t))set_exchange_type;
-       this->public.get_message_id = (u_int32_t (*) (ike_header_t*))get_message_id;
-       this->public.set_message_id = (void (*) (ike_header_t*,u_int32_t))set_message_id;
-
-       /* set default values of the fields */
-       this->initiator_spi = 0;
-       this->responder_spi = 0;
-       this->next_payload = 0;
-       this->maj_version = IKE_MAJOR_VERSION;
-       this->min_version = IKE_MINOR_VERSION;
-       this->exchange_type = EXCHANGE_TYPE_UNDEFINED;
-       this->flags.initiator = TRUE;
-       this->flags.version = HIGHER_VERSION_SUPPORTED_FLAG;
-       this->flags.response = FALSE;
-       this->message_id = 0;
-       this->length = IKE_HEADER_LENGTH;
-
-       return (ike_header_t*)this;
+       private_ike_header_t *this;
+
+       INIT(this,
+               .public = {
+                       .payload_interface = {
+                               .verify = _verify,
+                               .get_encoding_rules = _get_encoding_rules,
+                               .get_length = _get_length,
+                               .get_next_type = _get_next_type,
+                               .set_next_type = _set_next_type,
+                               .get_type = _get_type,
+                               .destroy = _destroy,
+                       },
+                       .get_initiator_spi = _get_initiator_spi,
+                       .set_initiator_spi = _set_initiator_spi,
+                       .get_responder_spi = _get_responder_spi,
+                       .set_responder_spi = _set_responder_spi,
+                       .get_maj_version = _get_maj_version,
+                       .set_maj_version = _set_maj_version,
+                       .get_min_version = _get_min_version,
+                       .set_min_version = _set_min_version,
+                       .get_response_flag = _get_response_flag,
+                       .set_response_flag = _set_response_flag,
+                       .get_version_flag = _get_version_flag,
+                       .set_version_flag = _set_version_flag,
+                       .get_initiator_flag = _get_initiator_flag,
+                       .set_initiator_flag = _set_initiator_flag,
+                       .get_encryption_flag = _get_encryption_flag,
+                       .set_encryption_flag = _set_encryption_flag,
+                       .get_commit_flag = _get_commit_flag,
+                       .set_commit_flag = _set_commit_flag,
+                       .get_authonly_flag = _get_authonly_flag,
+                       .set_authonly_flag = _set_authonly_flag,
+                       .get_exchange_type = _get_exchange_type,
+                       .set_exchange_type = _set_exchange_type,
+                       .get_message_id = _get_message_id,
+                       .set_message_id = _set_message_id,
+                       .destroy = _destroy,
+               },
+               .length = IKE_HEADER_LENGTH,
+               .exchange_type = EXCHANGE_TYPE_UNDEFINED,
+       );
+
+       return &this->public;
 }
+
+/*
+ * Described in header.
+ */
+ike_header_t *ike_header_create_version(int major, int minor)
+{
+       ike_header_t *this = ike_header_create();
+
+       this->set_maj_version(this, major);
+       this->set_min_version(this, minor);
+       if (major == IKEV2_MAJOR_VERSION)
+       {
+               this->set_initiator_flag(this, TRUE);
+       }
+       return this;
+}
+