-remove trailing whitespace
[oweals/gnunet.git] / src / include / gnunet_transport_plugin.h
index 1e46c92f8c65648aa88536fd27669eeda6db4e57..f835bdcd8566d9a97a3c8f1ab7e49c006efaed57 100644 (file)
@@ -35,6 +35,9 @@
 #include "gnunet_scheduler_lib.h"
 #include "gnunet_statistics_service.h"
 #include "gnunet_transport_service.h"
+#include "gnunet_ats_service.h"
+
+#define TRANSPORT_SESSION_INBOUND_STRING "<inbound>"
 
 /**
  * Opaque pointer that plugins can use to distinguish specific
  * useful since sometimes (i.e. for inbound TCP connections) a
  * connection may not have an address that can be used for meaningful
  * distinction between sessions to the same peer.
+ *
+ * Each 'struct Session' MUST start with the 'struct GNUNET_PeerIdentity'
+ * of the peer the session is for (which will be used for some error
+ * checking by the ATS code).
  */
 struct Session;
 
@@ -52,18 +59,7 @@ struct Session;
  */
 struct SessionHeader
 {
-
-  /**
-   * Cached signature for PONG generation for the session.  Do not use
-   * in the plugin!
-   */
-  struct GNUNET_CRYPTO_RsaSignature pong_signature;
-
-  /**
-   * Expiration time for signature.  Do not use in the plugin!
-   */
-  struct GNUNET_TIME_Absolute pong_sig_expires;
-
+  /* empty, for now */
 };
 
 /**
@@ -80,10 +76,35 @@ struct SessionHeader
  * @param session which session is being destoyed
  */
 typedef void (*GNUNET_TRANSPORT_SessionEnd) (void *cls,
-                                             const struct GNUNET_PeerIdentity *
-                                             peer, struct Session * session);
+                                             const struct GNUNET_PeerIdentity *peer,
+                                             struct Session * session);
 
 
+/**
+ * Function that will be called whenever the plugin internally
+ * creates a new session and hence transport need to tell ATS.
+ * This happens when we have a inbound connection we did not
+ * initiate.
+ *
+ * @param cls closure
+ * @param peer peer
+ * @param plugin plugin
+ * @param address address
+ * @param address_len length of the address
+ * @param session session
+ * @param ats ATS information
+ * @param ats_count number of ATS information contained
+ */
+typedef void
+(*GNUNET_TRANSPORT_SessionStart) (void *cls,
+                                         const struct GNUNET_PeerIdentity *peer,
+                                         const char *plugin,
+                                         const void *address,
+                                         uint16_t address_len,
+                                         struct Session *session,
+                                         const struct GNUNET_ATS_Information *ats,
+                                         uint32_t ats_count);
+
 /**
  * Function called by the transport for each received message.
  * This function should also be called with "NULL" for the
@@ -107,24 +128,11 @@ typedef void (*GNUNET_TRANSPORT_SessionEnd) (void *cls,
  */
 typedef struct
     GNUNET_TIME_Relative (*GNUNET_TRANSPORT_PluginReceiveCallback) (void *cls,
-                                                                    const struct
-                                                                    GNUNET_PeerIdentity
-                                                                    * peer,
-                                                                    const struct
-                                                                    GNUNET_MessageHeader
-                                                                    * message,
-                                                                    const struct
-                                                                    GNUNET_ATS_Information
-                                                                    * ats,
-                                                                    uint32_t
-                                                                    ats_count,
-                                                                    struct
-                                                                    Session *
-                                                                    session,
-                                                                    const char
-                                                                    *sender_address,
-                                                                    uint16_t
-                                                                    sender_address_len);
+                                                                                                                                               const struct GNUNET_PeerIdentity *peer,
+                                                                                                                                               const struct GNUNET_MessageHeader *message,
+                                                                                                                                               struct Session *session,
+                                                                                                                                               const char *sender_address,
+                                                                                                                                               uint16_t sender_address_len);
 
 
 /**
@@ -136,11 +144,32 @@ typedef struct
  * @param addrlen length of the address
  * @return ATS Information containing the network type
  */
-typedef const struct GNUNET_ATS_Information
+typedef struct GNUNET_ATS_Information
 (*GNUNET_TRANSPORT_AddressToType) (void *cls,
                                    const struct sockaddr *addr,
                                    size_t addrlen);
 
+
+/**
+ * Function called when quality properties of an address change.
+ *
+ * @param cls closure
+ * @param peer peer
+ * @param address address
+ * @param address_len length of the address
+ * @param session session
+ * @param ats ATS information
+ * @param ats_count number of ATS information contained
+ */
+typedef void
+(*GNUNET_TRANSPORT_UpdateAddressMetrics) (void *cls,
+                                         const struct GNUNET_PeerIdentity *peer,
+                                         const void *address,
+                                         uint16_t address_len,
+                                         struct Session *session,
+                                         const struct GNUNET_ATS_Information *ats,
+                                         uint32_t ats_count);
+
 /**
  * Function that will be called for each address the transport
  * is aware that it might be reachable under.
@@ -151,10 +180,13 @@ typedef const struct GNUNET_ATS_Information
  * @param addr one of the addresses of the host
  *        the specific address format depends on the transport
  * @param addrlen length of the address
+ * @param dest_plugin plugin to use this address with
  */
-typedef void (*GNUNET_TRANSPORT_AddressNotification) (void *cls, int add_remove,
+typedef void (*GNUNET_TRANSPORT_AddressNotification) (void *cls,
+                                                                                                                                                                                                                       int add_remove,
                                                       const void *addr,
-                                                      size_t addrlen);
+                                                      size_t addrlen,
+                                                      const char *dest_plugin);
 
 
 /**
@@ -172,21 +204,16 @@ typedef void (*GNUNET_TRANSPORT_AddressNotification) (void *cls, int add_remove,
  * @return how long to wait until reading more from this peer
  *         (to enforce inbound quotas)
  */
-typedef struct GNUNET_TIME_Relative (*GNUNET_TRANSPORT_TrafficReport) (void
-                                                                       *cls,
-                                                                       const
-                                                                       struct
-                                                                       GNUNET_PeerIdentity
-                                                                       * peer,
-                                                                       size_t
-                                                                       amount_recved);
+typedef struct GNUNET_TIME_Relative (*GNUNET_TRANSPORT_TrafficReport) (void *cls,
+                                                                                const struct GNUNET_PeerIdentity* peer,
+                                                                                size_t amount_recved);
 
 
 /**
  * Function that returns a HELLO message.
  */
-typedef const struct GNUNET_MessageHeader
-    *(*GNUNET_TRANSPORT_GetHelloCallback) (void);
+typedef const struct GNUNET_MessageHeader *
+    (*GNUNET_TRANSPORT_GetHelloCallback) (void);
 
 
 /**
@@ -220,7 +247,7 @@ struct GNUNET_TRANSPORT_PluginEnvironment
    * Function that should be called by the transport plugin
    * whenever a message is received.  If this field is "NULL",
    * the plugin should load in 'stub' mode and NOT fully
-   * initialize and instead only return an API with the 
+   * initialize and instead only return an API with the
    * 'address_pretty_printer', 'address_to_string' and
    * 'string_to_address' functions.
    */
@@ -245,12 +272,24 @@ struct GNUNET_TRANSPORT_PluginEnvironment
    */
   GNUNET_TRANSPORT_SessionEnd session_end;
 
+  /**
+   * Function called by the plugin when a new (incoming) session was created
+   * not explicitly created using the the get_session function
+   */
+  GNUNET_TRANSPORT_SessionStart session_start;
+
   /**
    * Function that will be called to figure if an address is an loopback,
    * LAN, WAN etc. address
    */
   GNUNET_TRANSPORT_AddressToType get_address_type;
 
+  /**
+   * Function that will be called to figure if an address is an loopback,
+   * LAN, WAN etc. address
+   */
+  GNUNET_TRANSPORT_UpdateAddressMetrics update_address_metrics;
+
 
   /**
    * What is the maximum number of connections that this transport
@@ -277,11 +316,15 @@ struct GNUNET_TRANSPORT_PluginEnvironment
  *               GNUNET_SYSERR if the target disconnected;
  *               disconnect will ALSO be signalled using
  *               the ReceiveCallback.
+ * @param size_payload bytes of payload from transport service in message
+ * @param size_on_wire bytes required on wire for transmission,
+ *               0 if result == GNUNET_SYSERR
  */
 typedef void (*GNUNET_TRANSPORT_TransmitContinuation) (void *cls,
-                                                       const struct
-                                                       GNUNET_PeerIdentity *
-                                                       target, int result);
+                                                                const struct GNUNET_PeerIdentity *target,
+                                                                int result,
+                                                                size_t size_payload,
+                                                                size_t size_on_wire);
 
 /**
  * The new send function with just the session and no address
@@ -299,7 +342,7 @@ typedef void (*GNUNET_TRANSPORT_TransmitContinuation) (void *cls,
  * @param msgbuf_size number of bytes in 'msgbuf'
  * @param priority how important is the message (most plugins will
  *                 ignore message priority and just FIFO)
- * @param timeout how long to wait at most for the transmission (does not
+ * @param to how long to wait at most for the transmission (does not
  *                require plugins to discard the message after the timeout,
  *                just advisory for the desired delay; most plugins will ignore
  *                this as well)
@@ -313,11 +356,13 @@ typedef void (*GNUNET_TRANSPORT_TransmitContinuation) (void *cls,
  *         and does NOT mean that the message was not transmitted (DV)
  */
 typedef ssize_t (*GNUNET_TRANSPORT_TransmitFunction) (void *cls,
-    struct Session *session,
-    const char *msgbuf, size_t msgbuf_size,
-    unsigned int priority,
-    struct GNUNET_TIME_Relative to,
-    GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls);
+                                                     struct Session *session,
+                                                     const char *msgbuf,
+                                                     size_t msgbuf_size,
+                                                     unsigned int priority,
+                                                     struct GNUNET_TIME_Relative to,
+                                                     GNUNET_TRANSPORT_TransmitContinuation cont,
+                                                     void *cont_cls);
 
 
 /**
@@ -337,9 +382,7 @@ typedef ssize_t (*GNUNET_TRANSPORT_TransmitFunction) (void *cls,
  *        to be cancelled
  */
 typedef void (*GNUNET_TRANSPORT_DisconnectFunction) (void *cls,
-                                                     const struct
-                                                     GNUNET_PeerIdentity *
-                                                     target);
+                      const struct GNUNET_PeerIdentity *target);
 
 
 /**
@@ -347,7 +390,7 @@ typedef void (*GNUNET_TRANSPORT_DisconnectFunction) (void *cls,
  * each human-readable address obtained.
  *
  * @param cls closure
- * @param hostname one of the names for the host, NULL
+ * @param address one of the names for the host, NULL
  *        on the last call to the callback
  */
 typedef void (*GNUNET_TRANSPORT_AddressStringCallback) (void *cls,
@@ -359,7 +402,7 @@ typedef void (*GNUNET_TRANSPORT_AddressStringCallback) (void *cls,
  * format.
  *
  * @param cls closure
- * @param name name of the transport that generated the address
+ * @param type name of the transport that generated the address
  * @param addr one of the addresses of the host, NULL for the last address
  *        the specific address format depends on the transport
  * @param addrlen length of the address
@@ -369,15 +412,13 @@ typedef void (*GNUNET_TRANSPORT_AddressStringCallback) (void *cls,
  * @param asc_cls closure for asc
  */
 typedef void (*GNUNET_TRANSPORT_AddressPrettyPrinter) (void *cls,
-                                                       const char *type,
-                                                       const void *addr,
-                                                       size_t addrlen,
-                                                       int numeric,
-                                                       struct
-                                                       GNUNET_TIME_Relative
-                                                       timeout,
-                                                       GNUNET_TRANSPORT_AddressStringCallback
-                                                       asc, void *asc_cls);
+                                                                                                                                const char *type,
+                                                                                                                                const void *addr,
+                                                                                                                                size_t addrlen,
+                                                                                                                                int numeric,
+                                                                                                                                struct GNUNET_TIME_Relative timeout,
+                                                                                                                                GNUNET_TRANSPORT_AddressStringCallback asc,
+                                                                                                                                void *asc_cls);
 
 
 /**
@@ -394,7 +435,8 @@ typedef void (*GNUNET_TRANSPORT_AddressPrettyPrinter) (void *cls,
  * @return GNUNET_OK if this is a plausible address for this peer
  *         and transport, GNUNET_SYSERR if not
  */
-typedef int (*GNUNET_TRANSPORT_CheckAddress) (void *cls, const void *addr,
+typedef int (*GNUNET_TRANSPORT_CheckAddress) (void *cls,
+                                                                                                                                                                                       const void *addr,
                                               size_t addrlen);
 
 /**
@@ -403,9 +445,7 @@ typedef int (*GNUNET_TRANSPORT_CheckAddress) (void *cls, const void *addr,
  * notify us by calling the env->session_end function
  *
  * @param cls the plugin
- * @param target the neighbour id
- * @param addr pointer to the address
- * @param addrlen length of addr
+ * @param address the hello address
  * @return the session if the address is valid, NULL otherwise
  */
 typedef struct Session * (*GNUNET_TRANSPORT_CreateSession) (void *cls,
@@ -433,7 +473,7 @@ typedef const char *(*GNUNET_TRANSPORT_AddressToString) (void *cls,
  *
  * @param cls closure ('struct Plugin*')
  * @param addr string address
- * @param addrlen length of the address
+ * @param addrlen length of the address including \0 termination
  * @param buf location to store the buffer
  *        If the function returns GNUNET_SYSERR, its contents are undefined.
  * @param added length of created address
@@ -446,6 +486,17 @@ typedef int (*GNUNET_TRANSPORT_StringToAddress) (void *cls,
                                                  size_t *added);
 
 
+/**
+ * Function to obtain the network type for a session
+ *
+ * @param cls closure ('struct Plugin*')
+ * @param session the session
+ * @return the network type
+ */
+typedef enum GNUNET_ATS_Network_Type (*GNUNET_TRANSPORT_GetNetworkType) (void *cls,
+                                                                        struct Session *session);
+
+
 /**
  * Each plugin is required to return a pointer to a struct of this
  * type as the return value from its entry point.
@@ -509,6 +560,11 @@ struct GNUNET_TRANSPORT_PluginFunctions
    * object
    */
   GNUNET_TRANSPORT_CreateSession get_session;
+
+  /**
+   * Function to obtain the network type for a session
+   */
+  GNUNET_TRANSPORT_GetNetworkType get_network;
 };