/*
- This file is part of GNUnet
- (C) 2002--2013 Christian Grothoff (and other contributing authors)
-
- GNUnet is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
-
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
-*/
+ This file is part of GNUnet
+ Copyright (C) 2002--2015 GNUnet e.V.
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+ */
/**
* @file transport/plugin_transport_tcp.c
* @brief Implementation of the TCP transport service
#include "gnunet_hello_lib.h"
#include "gnunet_constants.h"
#include "gnunet_util_lib.h"
-#include "gnunet_nat_lib.h"
+#include "gnunet_nat_service.h"
#include "gnunet_protocols.h"
#include "gnunet_resolver_service.h"
#include "gnunet_signatures.h"
#define PLUGIN_NAME "tcp"
-#define EXTRA_CHECKS ALLOW_EXTRA_CHECKS
-
/**
* How long until we give up on establishing an NAT connection?
* Must be > 4 RTT
*/
#define NAT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10)
+/**
+ * Opaque handle that can be used to cancel
+ * a transmit-ready notification.
+ */
+struct GNUNET_CONNECTION_TransmitHandle;
-GNUNET_NETWORK_STRUCT_BEGIN
+/**
+ * @brief handle for a server
+ */
+struct GNUNET_SERVER_Handle;
+
+/**
+ * @brief opaque handle for a client of the server
+ */
+struct GNUNET_SERVER_Client;
+
+/**
+ * @brief opaque handle server returns for aborting transmission to a client.
+ */
+struct GNUNET_SERVER_TransmitHandle;
+
+/**
+ * @brief handle for a network connection
+ */
+struct GNUNET_CONNECTION_Handle;
+
+/**
+ * @brief handle for a network service
+ */
+struct LEGACY_SERVICE_Context;
+
+
+/**
+ * Stops a service that was started with #GNUNET_SERVICE_start().
+ *
+ * @param srv service to stop
+ */
+void
+LEGACY_SERVICE_stop (struct LEGACY_SERVICE_Context *srv);
+
+
+
+/**
+ * Function called to notify a client about the connection begin ready
+ * to queue more data. @a buf will be NULL and @a size zero if the
+ * connection was closed for writing in the meantime.
+ *
+ * @param cls closure
+ * @param size number of bytes available in @a buf
+ * @param buf where the callee should write the message
+ * @return number of bytes written to @a buf
+ */
+typedef size_t
+(*GNUNET_CONNECTION_TransmitReadyNotify) (void *cls,
+ size_t size,
+ void *buf);
+
+/**
+ * Credentials for UNIX domain sockets.
+ */
+struct GNUNET_CONNECTION_Credentials
+{
+ /**
+ * UID of the other end of the connection.
+ */
+ uid_t uid;
+
+ /**
+ * GID of the other end of the connection.
+ */
+ gid_t gid;
+};
+
+
+/**
+ * Functions with this signature are called whenever a client
+ * is disconnected on the network level.
+ *
+ * @param cls closure
+ * @param client identification of the client; NULL
+ * for the last call when the server is destroyed
+ */
+typedef void
+(*GNUNET_SERVER_DisconnectCallback) (void *cls,
+ struct GNUNET_SERVER_Client *client);
+
+
+/**
+ * Functions with this signature are called whenever a client
+ * is connected on the network level.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ */
+typedef void
+(*GNUNET_SERVER_ConnectCallback) (void *cls,
+ struct GNUNET_SERVER_Client *client);
+
+
+
+
+/**
+ * Function to call for access control checks.
+ *
+ * @param cls closure
+ * @param ucred credentials, if available, otherwise NULL
+ * @param addr address
+ * @param addrlen length of address
+ * @return GNUNET_YES to allow, GNUNET_NO to deny, GNUNET_SYSERR
+ * for unknown address family (will be denied).
+ */
+typedef int
+(*GNUNET_CONNECTION_AccessCheck) (void *cls,
+ const struct
+ GNUNET_CONNECTION_Credentials *
+ ucred,
+ const struct sockaddr * addr,
+ socklen_t addrlen);
+
+/**
+ * Callback function for data received from the network. Note that
+ * both "available" and "err" would be 0 if the read simply timed out.
+ *
+ * @param cls closure
+ * @param buf pointer to received data
+ * @param available number of bytes availabe in "buf",
+ * possibly 0 (on errors)
+ * @param addr address of the sender
+ * @param addrlen size of addr
+ * @param errCode value of errno (on errors receiving)
+ */
+typedef void
+(*GNUNET_CONNECTION_Receiver) (void *cls, const void *buf,
+ size_t available,
+ const struct sockaddr * addr,
+ socklen_t addrlen, int errCode);
+
+
+
+/**
+ * Close the connection and free associated resources. There must
+ * not be any pending requests for reading or writing to the
+ * connection at this time.
+ *
+ * @param connection connection to destroy
+ */
+void
+GNUNET_CONNECTION_destroy (struct GNUNET_CONNECTION_Handle *connection);
+
+
+/**
+ * Signature of a function to create a custom tokenizer.
+ *
+ * @param cls closure from #GNUNET_SERVER_set_callbacks
+ * @param client handle to client the tokenzier will be used for
+ * @return handle to custom tokenizer ('mst')
+ */
+typedef void*
+(*GNUNET_SERVER_MstCreateCallback) (void *cls,
+ struct GNUNET_SERVER_Client *client);
+
+
+/**
+ * Signature of a function to destroy a custom tokenizer.
+ *
+ * @param cls closure from #GNUNET_SERVER_set_callbacks
+ * @param mst custom tokenizer handle
+ */
+typedef void
+(*GNUNET_SERVER_MstDestroyCallback) (void *cls,
+ void *mst);
+
+/**
+ * Signature of a function to receive data for a custom tokenizer.
+ *
+ * @param cls closure from #GNUNET_SERVER_set_callbacks
+ * @param mst custom tokenizer handle
+ * @param client_identity ID of client for which this is a buffer,
+ * can be NULL (will be passed back to 'cb')
+ * @param buf input data to add
+ * @param size number of bytes in @a buf
+ * @param purge should any excess bytes in the buffer be discarded
+ * (i.e. for packet-based services like UDP)
+ * @param one_shot only call callback once, keep rest of message in buffer
+ * @return #GNUNET_OK if we are done processing (need more data)
+ * #GNUNET_NO if one_shot was set and we have another message ready
+ * #GNUNET_SYSERR if the data stream is corrupt
+ */
+typedef int
+(*GNUNET_SERVER_MstReceiveCallback) (void *cls, void *mst,
+ struct GNUNET_SERVER_Client *client,
+ const char *buf,
+ size_t size,
+ int purge,
+ int one_shot);
+/**
+ * Functions with this signature are called whenever a message is
+ * received.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message
+ */
+typedef void
+(*GNUNET_SERVER_MessageCallback) (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message);
/**
- * Address options
+ * Message handler. Each struct specifies how to handle on particular
+ * type of message received.
*/
-static uint32_t myoptions;
+struct GNUNET_SERVER_MessageHandler
+{
+ /**
+ * Function to call for messages of "type".
+ */
+ GNUNET_SERVER_MessageCallback callback;
+
+ /**
+ * Closure argument for @e callback.
+ */
+ void *callback_cls;
+
+ /**
+ * Type of the message this handler covers.
+ */
+ uint16_t type;
+
+ /**
+ * Expected size of messages of this type. Use 0 for
+ * variable-size. If non-zero, messages of the given
+ * type will be discarded (and the connection closed)
+ * if they do not have the right size.
+ */
+ uint16_t expected_size;
+
+};
+
+
+/**
+ * Options for the service (bitmask).
+ */
+enum LEGACY_SERVICE_Options
+{
+ /**
+ * Use defaults. Terminates all client connections and the listen
+ * sockets immediately upon receiving the shutdown signal.
+ */
+ LEGACY_SERVICE_OPTION_NONE = 0,
+
+ /**
+ * Do not trigger server shutdown on signal at all; instead, allow
+ * for the user to terminate the server explicitly when needed
+ * by calling #LEGACY_SERVICE_shutdown().
+ */
+ LEGACY_SERVICE_OPTION_MANUAL_SHUTDOWN = 1,
+
+ /**
+ * Trigger a SOFT server shutdown on signals, allowing active
+ * non-monitor clients to complete their transactions.
+ */
+ LEGACY_SERVICE_OPTION_SOFT_SHUTDOWN = 2
+};
+
+
+
+/**
+ * Ask the server to disconnect from the given client. This is the
+ * same as passing #GNUNET_SYSERR to #GNUNET_SERVER_receive_done,
+ * except that it allows dropping of a client even when not handling a
+ * message from that client.
+ *
+ * @param client the client to disconnect from
+ */
+void
+GNUNET_SERVER_client_disconnect (struct GNUNET_SERVER_Client *client);
+
+/**
+ * Return user context associated with the given client.
+ * Note: you should probably use the macro (call without the underscore).
+ *
+ * @param client client to query
+ * @param size number of bytes in user context struct (for verification only)
+ * @return pointer to user context
+ */
+void *
+GNUNET_SERVER_client_get_user_context_ (struct GNUNET_SERVER_Client *client,
+ size_t size);
+
+
+/**
+ * Functions with this signature are called whenever a
+ * complete message is received by the tokenizer.
+ *
+ * Do not call #GNUNET_SERVER_mst_destroy from within
+ * the scope of this callback.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR to stop further processing
+ */
+typedef int
+(*GNUNET_SERVER_MessageTokenizerCallback) (void *cls,
+ void *client,
+ const struct GNUNET_MessageHeader *message);
+
+
+/**
+ * Create a message stream tokenizer.
+ *
+ * @param cb function to call on completed messages
+ * @param cb_cls closure for @a cb
+ * @return handle to tokenizer
+ */
+struct GNUNET_SERVER_MessageStreamTokenizer *
+GNUNET_SERVER_mst_create (GNUNET_SERVER_MessageTokenizerCallback cb,
+ void *cb_cls);
+
+/**
+ * Add incoming data to the receive buffer and call the
+ * callback for all complete messages.
+ *
+ * @param mst tokenizer to use
+ * @param client_identity ID of client for which this is a buffer,
+ * can be NULL (will be passed back to 'cb')
+ * @param buf input data to add
+ * @param size number of bytes in @a buf
+ * @param purge should any excess bytes in the buffer be discarded
+ * (i.e. for packet-based services like UDP)
+ * @param one_shot only call callback once, keep rest of message in buffer
+ * @return #GNUNET_OK if we are done processing (need more data)
+ * #GNUNET_NO if one_shot was set and we have another message ready
+ * #GNUNET_SYSERR if the data stream is corrupt
+ */
+int
+GNUNET_SERVER_mst_receive (struct GNUNET_SERVER_MessageStreamTokenizer *mst,
+ void *client_identity,
+ const char *buf, size_t size,
+ int purge, int one_shot);
+
+
+
+/**
+ * Destroys a tokenizer.
+ *
+ * @param mst tokenizer to destroy
+ */
+void
+GNUNET_SERVER_mst_destroy (struct GNUNET_SERVER_MessageStreamTokenizer *mst);
+
+
+/**
+ * Set user context to be associated with the given client.
+ * Note: you should probably use the macro (call without the underscore).
+ *
+ * @param client client to query
+ * @param ptr pointer to user context
+ * @param size number of bytes in user context struct (for verification only)
+ */
+void
+GNUNET_SERVER_client_set_user_context_ (struct GNUNET_SERVER_Client *client,
+ void *ptr,
+ size_t size);
+/**
+ * Return user context associated with the given client.
+ *
+ * @param client client to query
+ * @param type expected return type (i.e. 'struct Foo')
+ * @return pointer to user context of type 'type *'.
+ */
+#define GNUNET_SERVER_client_get_user_context(client,type) \
+ (type *) GNUNET_SERVER_client_get_user_context_ (client, sizeof (type))
+
+/**
+ * Set user context to be associated with the given client.
+ *
+ * @param client client to query
+ * @param value pointer to user context
+ */
+#define GNUNET_SERVER_client_set_user_context(client,value) \
+ GNUNET_SERVER_client_set_user_context_ (client, value, sizeof (*value))
+
+
+
+/**
+ * Notify us when the server has enough space to transmit
+ * a message of the given size to the given client.
+ *
+ * @param client client to transmit message to
+ * @param size requested amount of buffer space
+ * @param timeout after how long should we give up (and call
+ * notify with buf NULL and size 0)?
+ * @param callback function to call when space is available
+ * @param callback_cls closure for @a callback
+ * @return non-NULL if the notify callback was queued; can be used
+ * to cancel the request using
+ * #GNUNET_SERVER_notify_transmit_ready_cancel.
+ * NULL if we are already going to notify someone else (busy)
+ */
+struct GNUNET_SERVER_TransmitHandle *
+GNUNET_SERVER_notify_transmit_ready (struct GNUNET_SERVER_Client *client,
+ size_t size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_CONNECTION_TransmitReadyNotify callback,
+ void *callback_cls);
+
+/**
+ * Abort transmission request.
+ *
+ * @param th request to abort
+ */
+void
+GNUNET_SERVER_notify_transmit_ready_cancel (struct GNUNET_SERVER_TransmitHandle *th);
+
+
+
+
+/**
+ * Notify the server that the given client handle should
+ * be kept (keeps the connection up if possible, increments
+ * the internal reference counter).
+ *
+ * @param client the client to keep
+ */
+void
+GNUNET_SERVER_client_keep (struct GNUNET_SERVER_Client *client);
+
+
+/**
+ * Notify the server that the given client handle is no
+ * longer required. Decrements the reference counter. If
+ * that counter reaches zero an inactive connection maybe
+ * closed.
+ *
+ * @param client the client to drop
+ */
+void
+GNUNET_SERVER_client_drop (struct GNUNET_SERVER_Client *client);
+
+
+/**
+ * Function called by the service's run
+ * method to run service-specific setup code.
+ *
+ * @param cls closure
+ * @param server the initialized server
+ * @param cfg configuration to use
+ */
+typedef void
+(*LEGACY_SERVICE_Main) (void *cls,
+ struct GNUNET_SERVER_Handle *server,
+ const struct GNUNET_CONFIGURATION_Handle *cfg);
+
+
+
+/**
+ * Suspend accepting connections from the listen socket temporarily.
+ * Resume activity using #GNUNET_SERVER_resume.
+ *
+ * @param server server to stop accepting connections.
+ */
+void
+GNUNET_SERVER_suspend (struct GNUNET_SERVER_Handle *server);
+
+/**
+ * Notify us when the server has enough space to transmit
+ * a message of the given size to the given client.
+ *
+ * @param client client to transmit message to
+ * @param size requested amount of buffer space
+ * @param timeout after how long should we give up (and call
+ * notify with buf NULL and size 0)?
+ * @param callback function to call when space is available
+ * @param callback_cls closure for @a callback
+ * @return non-NULL if the notify callback was queued; can be used
+ * to cancel the request using
+ * #GNUNET_SERVER_notify_transmit_ready_cancel.
+ * NULL if we are already going to notify someone else (busy)
+ */
+struct GNUNET_SERVER_TransmitHandle *
+GNUNET_SERVER_notify_transmit_ready (struct GNUNET_SERVER_Client *client,
+ size_t size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_CONNECTION_TransmitReadyNotify callback,
+ void *callback_cls);
+
+
+/**
+ * Add a TCP socket-based connection to the set of handles managed by
+ * this server. Use this function for outgoing (P2P) connections that
+ * we initiated (and where this server should process incoming
+ * messages).
+ *
+ * @param server the server to use
+ * @param connection the connection to manage (client must
+ * stop using this connection from now on)
+ * @return the client handle
+ */
+struct GNUNET_SERVER_Client *
+GNUNET_SERVER_connect_socket (struct GNUNET_SERVER_Handle *server,
+ struct GNUNET_CONNECTION_Handle *connection);
+
+
+/**
+ * Resume accepting connections from the listen socket.
+ *
+ * @param server server to resume accepting connections.
+ */
+void
+GNUNET_SERVER_resume (struct GNUNET_SERVER_Handle *server);
+
+/**
+ * Free resources held by this server.
+ *
+ * @param server server to destroy
+ */
+void
+GNUNET_SERVER_destroy (struct GNUNET_SERVER_Handle *server);
+
+
+
+
+#include "tcp_connection_legacy.c"
+#include "tcp_server_mst_legacy.c"
+#include "tcp_server_legacy.c"
+#include "tcp_service_legacy.c"
+
+GNUNET_NETWORK_STRUCT_BEGIN
/**
* Initial handshake message for a session.
struct WelcomeMessage
{
/**
- * Type is GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME.
+ * Type is #GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME.
*/
struct GNUNET_MessageHeader header;
};
-
/**
* Basically a WELCOME message, but with the purpose
* of giving the waiting peer a client handle to use
struct TCP_NAT_ProbeMessage
{
/**
- * Type is GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE.
+ * Type is #GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE.
*/
struct GNUNET_MessageHeader header;
struct Plugin *plugin;
};
+/**
+ * Bits in the `options` field of TCP addresses.
+ */
+enum TcpAddressOptions
+{
+
+ /**
+ * No bits set.
+ */
+ TCP_OPTIONS_NONE = 0,
+
+ /**
+ * See #HTTP_OPTIONS_VERIFY_CERTIFICATE.
+ */
+ TCP_OPTIONS_RESERVED = 1,
+
+ /**
+ * Enable TCP Stealth-style port knocking.
+ */
+ TCP_OPTIONS_TCP_STEALTH = 2
+};
GNUNET_NETWORK_STRUCT_BEGIN
struct IPv4TcpAddress
{
/**
- * Optional options and flags for this address
+ * Optional options and flags for this address,
+ * see `enum TcpAddressOptions`
*/
- uint32_t options;
+ uint32_t options GNUNET_PACKED;
/**
* IPv4 address, in network byte order.
};
-
/**
* Network format for IPv6 addresses.
*/
{
/**
* Optional flags for this address
+ * see `enum TcpAddressOptions`
*/
- uint32_t options;
+ uint32_t options GNUNET_PACKED;
/**
* IPv6 address.
*/
struct Plugin;
-
/**
* Information kept for each message that is yet to
* be transmitted.
GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
/**
- * Closure for transmit_cont.
+ * Closure for @e transmit_cont.
*/
void *transmit_cont_cls;
/**
* So that the gnunet-service-transport can group messages together,
* these pending messages need to accept a message buffer and size
- * instead of just a GNUNET_MessageHeader.
+ * instead of just a `struct GNUNET_MessageHeader`.
*/
size_t message_size;
};
-
/**
* Session handle for TCP connections.
*/
-struct Session
+struct GNUNET_ATS_Session
{
/**
* To whom are we talking to (set to our identity
*/
struct GNUNET_PeerIdentity target;
- /**
- * API requirement.
- */
- struct SessionHeader header;
-
/**
* Pointer to the global plugin struct.
*/
/**
* Task cleaning up a NAT client connection establishment attempt;
*/
- GNUNET_SCHEDULER_TaskIdentifier nat_connection_timeout;
+ struct GNUNET_SCHEDULER_Task *nat_connection_timeout;
/**
* Messages currently pending for transmission
*/
struct GNUNET_SERVER_TransmitHandle *transmit_handle;
+ /**
+ * Address of the other peer.
+ */
+ struct GNUNET_HELLO_Address *address;
+
/**
* ID of task used to delay receiving more to throttle sender.
*/
- GNUNET_SCHEDULER_TaskIdentifier receive_delay_task;
+ struct GNUNET_SCHEDULER_Task *receive_delay_task;
/**
* Session timeout task
*/
- GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+ struct GNUNET_SCHEDULER_Task *timeout_task;
/**
- * Address of the other peer (either based on our 'connect'
- * call or on our 'accept' call).
- *
- * struct IPv4TcpAddress or struct IPv6TcpAddress
+ * When will this session time out?
*/
- void *addr;
+ struct GNUNET_TIME_Absolute timeout;
/**
- * Length of @e addr.
+ * When will we continue to read from the socket?
+ * (used to enforce inbound quota).
*/
- size_t addrlen;
+ struct GNUNET_TIME_Absolute receive_delay;
/**
* Last activity on this connection. Used to select preferred
struct GNUNET_TIME_Absolute last_activity;
/**
- * Are we still expecting the welcome message? (#GNUNET_YES/#GNUNET_NO)
+ * Number of bytes waiting for transmission to this peer.
*/
- int expecting_welcome;
+ unsigned long long bytes_in_queue;
+
+ /**
+ * Number of messages waiting for transmission to this peer.
+ */
+ unsigned int msgs_in_queue;
+
+ /**
+ * Network type of the address.
+ */
+ enum GNUNET_ATS_Network_Type scope;
/**
- * Was this a connection that was inbound (we accepted)? (#GNUNET_YES/#GNUNET_NO)
+ * Are we still expecting the welcome message? (#GNUNET_YES/#GNUNET_NO)
*/
- int inbound;
+ int expecting_welcome;
/**
* Was this session created using NAT traversal?
*/
int is_nat;
+};
+
+
+/**
+ * Context for address to string conversion, closure
+ * for #append_port().
+ */
+struct PrettyPrinterContext
+{
+ /**
+ * DLL
+ */
+ struct PrettyPrinterContext *next;
+
+ /**
+ * DLL
+ */
+ struct PrettyPrinterContext *prev;
+
+ /**
+ * Our plugin.
+ */
+ struct Plugin *plugin;
+
+ /**
+ * Timeout task
+ */
+ struct GNUNET_SCHEDULER_Task *timeout_task;
+
+ /**
+ * Resolver handle
+ */
+ struct GNUNET_RESOLVER_RequestHandle *resolver_handle;
+
+ /**
+ * Function to call with the result.
+ */
+ GNUNET_TRANSPORT_AddressStringCallback asc;
+
+ /**
+ * Clsoure for @e asc.
+ */
+ void *asc_cls;
+
+ /**
+ * IPv6 address
+ */
+ int ipv6;
+
+ /**
+ * Options
+ */
+ uint32_t options;
+
/**
- * ATS network type in NBO
+ * Port to add after the IP address.
*/
- enum GNUNET_ATS_Network_Type ats_address_network_type;
+ uint16_t port;
};
/**
* Handle to the network service.
*/
- struct GNUNET_SERVICE_Context *service;
+ struct LEGACY_SERVICE_Context *service;
/**
* Handle to the server for this service.
struct TCPProbeContext *probe_tail;
/**
- * Handle for (DYN)DNS lookup of our external IP.
+ * Function to call about session status changes.
+ */
+ GNUNET_TRANSPORT_SessionInfoCallback sic;
+
+ /**
+ * Closure for @e sic.
+ */
+ void *sic_cls;
+
+ /**
+ * ID of task used to update our addresses when one expires.
+ */
+ struct GNUNET_SCHEDULER_Task *address_update_task;
+
+ /**
+ * Running pretty printers: head
+ */
+ struct PrettyPrinterContext *ppc_dll_head;
+
+ /**
+ * Running pretty printers: tail
+ */
+ struct PrettyPrinterContext *ppc_dll_tail;
+
+ /**
+ * Welcome message used by this peer.
*/
- struct GNUNET_RESOLVER_RequestHandle *ext_dns;
+ struct WelcomeMessage my_welcome;
/**
* How many more TCP sessions are we allowed to open right now?
unsigned long long cur_connections;
/**
- * ID of task used to update our addresses when one expires.
+ * Address options
*/
- GNUNET_SCHEDULER_TaskIdentifier address_update_task;
+ uint32_t myoptions;
/**
* Port that we are actually listening on.
/**
- * Function called for a quick conversion of the binary address to
- * a numeric address. Note that the caller must not free the
- * address and that the next call to this function is allowed
- * to override the address again.
+ * Get the list of addresses that a server for the given service
+ * should bind to.
*
- * @param cls closure ('struct Plugin*')
- * @param addr binary address
- * @param addrlen length of the address
- * @return string representing the same address
+ * @param service_name name of the service
+ * @param cfg configuration (which specifies the addresses)
+ * @param addrs set (call by reference) to an array of pointers to the
+ * addresses the server should bind to and listen on; the
+ * array will be NULL-terminated (on success)
+ * @param addr_lens set (call by reference) to an array of the lengths
+ * of the respective `struct sockaddr` struct in the @a addrs
+ * array (on success)
+ * @return number of addresses found on success,
+ * #GNUNET_SYSERR if the configuration
+ * did not specify reasonable finding information or
+ * if it specified a hostname that could not be resolved;
+ * #GNUNET_NO if the number of addresses configured is
+ * zero (in this case, `*addrs` and `*addr_lens` will be
+ * set to NULL).
*/
-static const char *
-tcp_address_to_string (void *cls,
- const void *addr,
- size_t addrlen);
+static int
+get_server_addresses (const char *service_name,
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ struct sockaddr ***addrs,
+ socklen_t ** addr_lens)
+{
+ int disablev6;
+ struct GNUNET_NETWORK_Handle *desc;
+ unsigned long long port;
+ char *unixpath;
+ struct addrinfo hints;
+ struct addrinfo *res;
+ struct addrinfo *pos;
+ struct addrinfo *next;
+ unsigned int i;
+ int resi;
+ int ret;
+ int abstract;
+ struct sockaddr **saddrs;
+ socklen_t *saddrlens;
+ char *hostname;
+
+ *addrs = NULL;
+ *addr_lens = NULL;
+ desc = NULL;
+ if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "DISABLEV6"))
+ {
+ if (GNUNET_SYSERR ==
+ (disablev6 =
+ GNUNET_CONFIGURATION_get_value_yesno (cfg, service_name, "DISABLEV6")))
+ return GNUNET_SYSERR;
+ }
+ else
+ disablev6 = GNUNET_NO;
+
+ if (! disablev6)
+ {
+ /* probe IPv6 support */
+ desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
+ if (NULL == desc)
+ {
+ if ((ENOBUFS == errno) || (ENOMEM == errno) || (ENFILE == errno) ||
+ (EACCES == errno))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
+ return GNUNET_SYSERR;
+ }
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Disabling IPv6 support for service `%s', failed to create IPv6 socket: %s\n"),
+ service_name, STRERROR (errno));
+ disablev6 = GNUNET_YES;
+ }
+ else
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
+ desc = NULL;
+ }
+ }
+
+ port = 0;
+ if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "PORT"))
+ {
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (cfg, service_name,
+ "PORT", &port))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Require valid port number for service `%s' in configuration!\n"),
+ service_name);
+ }
+ if (port > 65535)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Require valid port number for service `%s' in configuration!\n"),
+ service_name);
+ return GNUNET_SYSERR;
+ }
+ }
+
+ if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "BINDTO"))
+ {
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, service_name,
+ "BINDTO", &hostname));
+ }
+ else
+ hostname = NULL;
+
+ unixpath = NULL;
+ abstract = GNUNET_NO;
+#ifdef AF_UNIX
+ if ((GNUNET_YES ==
+ GNUNET_CONFIGURATION_have_value (cfg, service_name, "UNIXPATH")) &&
+ (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_filename (cfg, service_name, "UNIXPATH",
+ &unixpath)) &&
+ (0 < strlen (unixpath)))
+ {
+ /* probe UNIX support */
+ struct sockaddr_un s_un;
+
+ if (strlen (unixpath) >= sizeof (s_un.sun_path))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("UNIXPATH `%s' too long, maximum length is %llu\n"), unixpath,
+ (unsigned long long) sizeof (s_un.sun_path));
+ unixpath = GNUNET_NETWORK_shorten_unixpath (unixpath);
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Using `%s' instead\n"),
+ unixpath);
+ }
+#ifdef LINUX
+ abstract = GNUNET_CONFIGURATION_get_value_yesno (cfg,
+ "TESTING",
+ "USE_ABSTRACT_SOCKETS");
+ if (GNUNET_SYSERR == abstract)
+ abstract = GNUNET_NO;
+#endif
+ if ((GNUNET_YES != abstract)
+ && (GNUNET_OK !=
+ GNUNET_DISK_directory_create_for_file (unixpath)))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
+ "mkdir",
+ unixpath);
+ }
+ if (NULL != unixpath)
+ {
+ desc = GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_STREAM, 0);
+ if (NULL == desc)
+ {
+ if ((ENOBUFS == errno) || (ENOMEM == errno) || (ENFILE == errno) ||
+ (EACCES == errno))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
+ GNUNET_free_non_null (hostname);
+ GNUNET_free (unixpath);
+ return GNUNET_SYSERR;
+ }
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Disabling UNIX domain socket support for service `%s', failed to create UNIX domain socket: %s\n"),
+ service_name,
+ STRERROR (errno));
+ GNUNET_free (unixpath);
+ unixpath = NULL;
+ }
+ else
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
+ desc = NULL;
+ }
+ }
+#endif
+
+ if ((0 == port) && (NULL == unixpath))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Have neither PORT nor UNIXPATH for service `%s', but one is required\n"),
+ service_name);
+ GNUNET_free_non_null (hostname);
+ return GNUNET_SYSERR;
+ }
+ if (0 == port)
+ {
+ saddrs = GNUNET_malloc (2 * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc (2 * sizeof (socklen_t));
+ add_unixpath (saddrs, saddrlens, unixpath, abstract);
+ GNUNET_free_non_null (unixpath);
+ GNUNET_free_non_null (hostname);
+ *addrs = saddrs;
+ *addr_lens = saddrlens;
+ return 1;
+ }
+
+ if (NULL != hostname)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Resolving `%s' since that is where `%s' will bind to.\n",
+ hostname,
+ service_name);
+ memset (&hints, 0, sizeof (struct addrinfo));
+ if (disablev6)
+ hints.ai_family = AF_INET;
+ hints.ai_protocol = IPPROTO_TCP;
+ if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
+ (NULL == res))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to resolve `%s': %s\n"),
+ hostname,
+ gai_strerror (ret));
+ GNUNET_free (hostname);
+ GNUNET_free_non_null (unixpath);
+ return GNUNET_SYSERR;
+ }
+ next = res;
+ i = 0;
+ while (NULL != (pos = next))
+ {
+ next = pos->ai_next;
+ if ((disablev6) && (pos->ai_family == AF_INET6))
+ continue;
+ i++;
+ }
+ if (0 == i)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to find %saddress for `%s'.\n"),
+ disablev6 ? "IPv4 " : "",
+ hostname);
+ freeaddrinfo (res);
+ GNUNET_free (hostname);
+ GNUNET_free_non_null (unixpath);
+ return GNUNET_SYSERR;
+ }
+ resi = i;
+ if (NULL != unixpath)
+ resi++;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ i = 0;
+ if (NULL != unixpath)
+ {
+ add_unixpath (saddrs, saddrlens, unixpath, abstract);
+ i++;
+ }
+ next = res;
+ while (NULL != (pos = next))
+ {
+ next = pos->ai_next;
+ if ((disablev6) && (AF_INET6 == pos->ai_family))
+ continue;
+ if ((IPPROTO_TCP != pos->ai_protocol) && (0 != pos->ai_protocol))
+ continue; /* not TCP */
+ if ((SOCK_STREAM != pos->ai_socktype) && (0 != pos->ai_socktype))
+ continue; /* huh? */
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Service `%s' will bind to `%s'\n",
+ service_name, GNUNET_a2s (pos->ai_addr, pos->ai_addrlen));
+ if (AF_INET == pos->ai_family)
+ {
+ GNUNET_assert (sizeof (struct sockaddr_in) == pos->ai_addrlen);
+ saddrlens[i] = pos->ai_addrlen;
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+ GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ else
+ {
+ GNUNET_assert (AF_INET6 == pos->ai_family);
+ GNUNET_assert (sizeof (struct sockaddr_in6) == pos->ai_addrlen);
+ saddrlens[i] = pos->ai_addrlen;
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+ GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
+ }
+ i++;
+ }
+ GNUNET_free (hostname);
+ freeaddrinfo (res);
+ resi = i;
+ }
+ else
+ {
+ /* will bind against everything, just set port */
+ if (disablev6)
+ {
+ /* V4-only */
+ resi = 1;
+ if (NULL != unixpath)
+ resi++;
+ i = 0;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ if (NULL != unixpath)
+ {
+ add_unixpath (saddrs, saddrlens, unixpath, abstract);
+ i++;
+ }
+ saddrlens[i] = sizeof (struct sockaddr_in);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
+#endif
+ ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ else
+ {
+ /* dual stack */
+ resi = 2;
+ if (NULL != unixpath)
+ resi++;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ i = 0;
+ if (NULL != unixpath)
+ {
+ add_unixpath (saddrs, saddrlens, unixpath, abstract);
+ i++;
+ }
+ saddrlens[i] = sizeof (struct sockaddr_in6);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
+#endif
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
+ i++;
+ saddrlens[i] = sizeof (struct sockaddr_in);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
+#endif
+ ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ }
+ GNUNET_free_non_null (unixpath);
+ *addrs = saddrs;
+ *addr_lens = saddrlens;
+ return resi;
+}
+/* end ancient copy-and-paste */
/**
- * Function to check if an inbound connection is acceptable.
- * Mostly used to limit the total number of open connections
- * we can have.
+ * If a session monitor is attached, notify it about the new
+ * session state.
*
- * @param cls the `struct Plugin`
- * @param ucred credentials, if available, otherwise NULL
- * @param addr address
- * @param addrlen length of address
- * @return #GNUNET_YES to allow, #GNUNET_NO to deny, #GNUNET_SYSERR
- * for unknown address family (will be denied).
+ * @param plugin our plugin
+ * @param session session that changed state
+ * @param state new state of the session
*/
-static int
-plugin_tcp_access_check (void *cls,
- const struct GNUNET_CONNECTION_Credentials *ucred,
- const struct sockaddr *addr, socklen_t addrlen)
+static void
+notify_session_monitor (struct Plugin *plugin,
+ struct GNUNET_ATS_Session *session,
+ enum GNUNET_TRANSPORT_SessionState state)
{
- struct Plugin *plugin = cls;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Accepting new incoming TCP connection from `%s'\n",
- GNUNET_a2s (addr, addrlen));
- if (plugin->cur_connections >= plugin->max_connections)
- return GNUNET_NO;
- plugin->cur_connections ++;
- return GNUNET_YES;
+ struct GNUNET_TRANSPORT_SessionInfo info;
+
+ if (NULL == plugin->sic)
+ return;
+ memset (&info, 0, sizeof (info));
+ info.state = state;
+ info.is_inbound = GNUNET_HELLO_address_check_option (session->address,
+ GNUNET_HELLO_ADDRESS_INFO_INBOUND);
+ info.num_msg_pending = session->msgs_in_queue;
+ info.num_bytes_pending = session->bytes_in_queue;
+ if (NULL != session->receive_delay_task)
+ info.receive_delay = session->receive_delay;
+ info.session_timeout = session->timeout;
+ info.address = session->address;
+ plugin->sic (plugin->sic_cls,
+ session,
+ &info);
}
/**
* Our external IP address/port mapping has changed.
*
- * @param cls closure, the 'struct Plugin'
+ * @param cls closure, the `struct Plugin`
* @param add_remove #GNUNET_YES to mean the new public IP address, #GNUNET_NO to mean
* the previous (now invalid) one
+ * @param ac address class the address belongs to
* @param addr either the previous or the new public IP address
- * @param addrlen actual lenght of the address
+ * @param addrlen actual length of @a addr
*/
static void
-tcp_nat_port_map_callback (void *cls, int add_remove,
- const struct sockaddr *addr,
+tcp_nat_port_map_callback (void *cls,
+ int add_remove,
+ enum GNUNET_NAT_AddressClass ac,
+ const struct sockaddr *addr,
socklen_t addrlen)
{
struct Plugin *plugin = cls;
+ struct GNUNET_HELLO_Address *address;
struct IPv4TcpAddress t4;
struct IPv6TcpAddress t6;
void *arg;
switch (addr->sa_family)
{
case AF_INET:
- GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
- memset (&t4,0, sizeof (t4));
- t4.options = htonl (myoptions);
+ GNUNET_assert(addrlen == sizeof(struct sockaddr_in));
+ memset (&t4, 0, sizeof(t4));
+ t4.options = htonl (plugin->myoptions);
t4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
t4.t4_port = ((struct sockaddr_in *) addr)->sin_port;
arg = &t4;
args = sizeof (t4);
break;
case AF_INET6:
- GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
- memset (&t6, 0, sizeof (t6));
- memcpy (&t6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
- sizeof (struct in6_addr));
- t6.options = htonl (myoptions);
+ GNUNET_assert(addrlen == sizeof(struct sockaddr_in6));
+ memset (&t6, 0, sizeof(t6));
+ GNUNET_memcpy (&t6.ipv6_addr,
+ &((struct sockaddr_in6 *) addr)->sin6_addr,
+ sizeof(struct in6_addr));
+ t6.options = htonl (plugin->myoptions);
t6.t6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
arg = &t6;
args = sizeof (t6);
break;
default:
- GNUNET_break (0);
+ GNUNET_break(0);
return;
}
/* modify our published address list */
- plugin->env->notify_address (plugin->env->cls, add_remove, arg, args, "tcp");
+ GNUNET_assert ((args == sizeof (struct IPv4TcpAddress)) ||
+ (args == sizeof (struct IPv6TcpAddress)));
+ /* TODO: use 'ac' here in the future... */
+ address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
+ PLUGIN_NAME,
+ arg,
+ args,
+ GNUNET_HELLO_ADDRESS_INFO_NONE);
+ plugin->env->notify_address (plugin->env->cls,
+ add_remove,
+ address);
+ GNUNET_HELLO_address_free (address);
}
*
* @param cls closure (`struct Plugin*`)
* @param addr binary address
- * @param addrlen length of the address
+ * @param addrlen length of @a addr
* @return string representing the same address
*/
static const char *
-tcp_address_to_string (void *cls, const void *addr, size_t addrlen)
+tcp_plugin_address_to_string (void *cls,
+ const void *addr,
+ size_t addrlen)
{
static char rbuf[INET6_ADDRSTRLEN + 12];
char buf[INET6_ADDRSTRLEN];
switch (addrlen)
{
- case sizeof (struct IPv6TcpAddress):
+ case sizeof(struct IPv6TcpAddress):
t6 = addr;
af = AF_INET6;
port = ntohs (t6->t6_port);
options = ntohl (t6->options);
- memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
+ GNUNET_memcpy (&a6, &t6->ipv6_addr, sizeof(a6));
sb = &a6;
break;
- case sizeof (struct IPv4TcpAddress):
+ case sizeof(struct IPv4TcpAddress):
t4 = addr;
af = AF_INET;
port = ntohs (t4->t4_port);
options = ntohl (t4->options);
- memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
+ GNUNET_memcpy (&a4, &t4->ipv4_addr, sizeof(a4));
sb = &a4;
break;
- case 0:
- {
- GNUNET_snprintf (rbuf, sizeof (rbuf), "%s",
- TRANSPORT_SESSION_INBOUND_STRING);
- return rbuf;
- }
default:
LOG (GNUNET_ERROR_TYPE_WARNING,
- _("Unexpected address length: %u bytes\n"),
- (unsigned int) addrlen);
- return NULL;
+ _("Unexpected address length: %u bytes\n"),
+ (unsigned int) addrlen);
+ return NULL ;
}
if (NULL == inet_ntop (af, sb, buf, INET6_ADDRSTRLEN))
{
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "inet_ntop");
- return NULL;
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "inet_ntop");
+ return NULL ;
}
- GNUNET_snprintf (rbuf,
- sizeof (rbuf),
- (af == AF_INET6)
- ? "%s.%u.[%s]:%u"
- : "%s.%u.%s:%u",
+ GNUNET_snprintf (rbuf, sizeof(rbuf),
+ (af == AF_INET6) ? "%s.%u.[%s]:%u" : "%s.%u.%s:%u",
PLUGIN_NAME,
options,
buf,
* @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
static int
-tcp_string_to_address (void *cls,
- const char *addr,
- uint16_t addrlen,
- void **buf, size_t *added)
+tcp_plugin_string_to_address (void *cls,
+ const char *addr,
+ uint16_t addrlen,
+ void **buf,
+ size_t *added)
{
struct sockaddr_storage socket_address;
char *address;
address = NULL;
plugin = NULL;
optionstr = NULL;
- if ((NULL == addr) || (addrlen == 0))
+ if ((NULL == addr) || (0 == addrlen))
{
- GNUNET_break (0);
+ GNUNET_break(0);
return GNUNET_SYSERR;
}
if ('\0' != addr[addrlen - 1])
{
- GNUNET_break (0);
+ GNUNET_break(0);
return GNUNET_SYSERR;
}
if (strlen (addr) != addrlen - 1)
{
- GNUNET_break (0);
+ GNUNET_break(0);
return GNUNET_SYSERR;
}
plugin = GNUNET_strdup (addr);
optionstr = strchr (plugin, '.');
if (NULL == optionstr)
{
- GNUNET_break (0);
- GNUNET_free (plugin);
+ GNUNET_break(0);
+ GNUNET_free(plugin);
return GNUNET_SYSERR;
}
optionstr[0] = '\0';
- optionstr ++;
+ optionstr++;
options = atol (optionstr);
address = strchr (optionstr, '.');
if (NULL == address)
{
- GNUNET_break (0);
- GNUNET_free (plugin);
+ GNUNET_break(0);
+ GNUNET_free(plugin);
return GNUNET_SYSERR;
}
address[0] = '\0';
- address ++;
+ address++;
if (GNUNET_OK !=
- GNUNET_STRINGS_to_address_ip (address, strlen (address),
+ GNUNET_STRINGS_to_address_ip (address,
+ strlen (address),
&socket_address))
{
- GNUNET_break (0);
- GNUNET_free (plugin);
+ GNUNET_break(0);
+ GNUNET_free(plugin);
return GNUNET_SYSERR;
}
- GNUNET_free (plugin);
+ GNUNET_free(plugin);
switch (socket_address.ss_family)
{
case AF_INET:
- {
- struct IPv4TcpAddress *t4;
- struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
- t4 = GNUNET_new (struct IPv4TcpAddress);
- t4->options = htonl (options);
- t4->ipv4_addr = in4->sin_addr.s_addr;
- t4->t4_port = in4->sin_port;
- *buf = t4;
- *added = sizeof (struct IPv4TcpAddress);
- return GNUNET_OK;
- }
+ {
+ struct IPv4TcpAddress *t4;
+ struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
+ t4 = GNUNET_new (struct IPv4TcpAddress);
+ t4->options = htonl (options);
+ t4->ipv4_addr = in4->sin_addr.s_addr;
+ t4->t4_port = in4->sin_port;
+ *buf = t4;
+ *added = sizeof(struct IPv4TcpAddress);
+ return GNUNET_OK;
+ }
case AF_INET6:
- {
- struct IPv6TcpAddress *t6;
- struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
- t6 = GNUNET_new (struct IPv6TcpAddress);
- t6->options = htonl (options);
- t6->ipv6_addr = in6->sin6_addr;
- t6->t6_port = in6->sin6_port;
- *buf = t6;
- *added = sizeof (struct IPv6TcpAddress);
- return GNUNET_OK;
- }
+ {
+ struct IPv6TcpAddress *t6;
+ struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
+ t6 = GNUNET_new (struct IPv6TcpAddress);
+ t6->options = htonl (options);
+ t6->ipv6_addr = in6->sin6_addr;
+ t6->t6_port = in6->sin6_port;
+ *buf = t6;
+ *added = sizeof(struct IPv6TcpAddress);
+ return GNUNET_OK;
+ }
default:
return GNUNET_SYSERR;
}
}
-/**
- * Closure for #session_lookup_by_client_it().
- */
-struct SessionClientCtx
-{
- /**
- * Client we are looking for.
- */
- const struct GNUNET_SERVER_Client *client;
-
- /**
- * Session that was found.
- */
- struct Session *ret;
-};
-
-
-static int
-session_lookup_by_client_it (void *cls,
- const struct GNUNET_PeerIdentity *key,
- void *value)
-{
- struct SessionClientCtx *sc_ctx = cls;
- struct Session *s = value;
-
- if (s->client == sc_ctx->client)
- {
- sc_ctx->ret = s;
- return GNUNET_NO;
- }
- return GNUNET_YES;
-}
-
-
/**
* Find the session handle for the given client.
* Currently uses both the hashmap and the client
* @param client which client to find the session handle for
* @return NULL if no matching session exists
*/
-static struct Session *
+static struct GNUNET_ATS_Session *
lookup_session_by_client (struct Plugin *plugin,
- const struct GNUNET_SERVER_Client *client)
+ struct GNUNET_SERVER_Client *client)
{
- struct Session *ret;
- struct SessionClientCtx sc_ctx;
-
- ret = GNUNET_SERVER_client_get_user_context (client, struct Session);
- sc_ctx.client = client;
- sc_ctx.ret = NULL;
- GNUNET_CONTAINER_multipeermap_iterate (plugin->sessionmap,
- &session_lookup_by_client_it, &sc_ctx);
- /* check both methods yield the same result */
- GNUNET_break (ret == sc_ctx.ret);
- return sc_ctx.ret;
+ return GNUNET_SERVER_client_get_user_context (client,
+ struct GNUNET_ATS_Session);
}
* @return #GNUNET_OK on success
*/
static int
-tcp_disconnect_session (void *cls,
- struct Session *session)
+tcp_plugin_disconnect_session (void *cls,
+ struct GNUNET_ATS_Session *session)
{
struct Plugin *plugin = cls;
struct PendingMessage *pm;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Disconnecting session of peer `%s' address `%s'\n",
GNUNET_i2s (&session->target),
- tcp_address_to_string (NULL, session->addr, session->addrlen));
+ tcp_plugin_address_to_string (session->plugin,
+ session->address->address,
+ session->address->address_length));
- if (GNUNET_SCHEDULER_NO_TASK != session->timeout_task)
+ if (NULL != session->timeout_task)
{
GNUNET_SCHEDULER_cancel (session->timeout_task);
- session->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ session->timeout_task = NULL;
+ session->timeout = GNUNET_TIME_UNIT_ZERO_ABS;
}
if (GNUNET_YES ==
session))
{
GNUNET_STATISTICS_update (session->plugin->env->stats,
- gettext_noop ("# TCP sessions active"), -1,
+ gettext_noop ("# TCP sessions active"),
+ -1,
GNUNET_NO);
}
else
{
GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multipeermap_remove (plugin->nat_wait_conns,
- &session->target,
- session));
+ GNUNET_CONTAINER_multipeermap_remove (plugin->nat_wait_conns,
+ &session->target,
+ session));
}
- GNUNET_SERVER_client_set_user_context (session->client,
- (void *) NULL);
+ if (NULL != session->client)
+ GNUNET_SERVER_client_set_user_context (session->client,
+ NULL);
/* clean up state */
if (NULL != session->transmit_handle)
session->transmit_handle = NULL;
}
session->plugin->env->session_end (session->plugin->env->cls,
- &session->target, session);
+ session->address,
+ session);
- if (GNUNET_SCHEDULER_NO_TASK != session->nat_connection_timeout)
+ if (NULL != session->nat_connection_timeout)
{
GNUNET_SCHEDULER_cancel (session->nat_connection_timeout);
- session->nat_connection_timeout = GNUNET_SCHEDULER_NO_TASK;
+ session->nat_connection_timeout = NULL;
}
while (NULL != (pm = session->pending_messages_head))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
- pm->transmit_cont !=
- NULL ? "Could not deliver message to `%4s'.\n" :
- "Could not deliver message to `%4s', notifying.\n",
- GNUNET_i2s (&session->target));
+ (NULL != pm->transmit_cont)
+ ? "Could not deliver message to `%s' at %s.\n"
+ : "Could not deliver message to `%s' at %s, notifying.\n",
+ GNUNET_i2s (&session->target),
+ tcp_plugin_address_to_string (session->plugin,
+ session->address->address,
+ session->address->address_length));
GNUNET_STATISTICS_update (session->plugin->env->stats,
gettext_noop ("# bytes currently in TCP buffers"),
-(int64_t) pm->message_size, GNUNET_NO);
GNUNET_STATISTICS_update (session->plugin->env->stats,
- gettext_noop
- ("# bytes discarded by TCP (disconnect)"),
- pm->message_size, GNUNET_NO);
+ gettext_noop ("# bytes discarded by TCP (disconnect)"),
+ pm->message_size,
+ GNUNET_NO);
GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
- session->pending_messages_tail, pm);
+ session->pending_messages_tail,
+ pm);
+ GNUNET_assert (0 < session->msgs_in_queue);
+ session->msgs_in_queue--;
+ GNUNET_assert (pm->message_size <= session->bytes_in_queue);
+ session->bytes_in_queue -= pm->message_size;
if (NULL != pm->transmit_cont)
- pm->transmit_cont (pm->transmit_cont_cls, &session->target,
- GNUNET_SYSERR, pm->message_size, 0);
+ pm->transmit_cont (pm->transmit_cont_cls,
+ &session->target,
+ GNUNET_SYSERR,
+ pm->message_size,
+ 0);
GNUNET_free (pm);
}
- if (session->receive_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_assert (0 == session->msgs_in_queue);
+ GNUNET_assert (0 == session->bytes_in_queue);
+ notify_session_monitor (session->plugin,
+ session,
+ GNUNET_TRANSPORT_SS_DONE);
+
+ if (NULL != session->receive_delay_task)
{
GNUNET_SCHEDULER_cancel (session->receive_delay_task);
- if (NULL != session->client)
- GNUNET_SERVER_receive_done (session->client, GNUNET_SYSERR);
+ session->receive_delay_task = NULL;
}
if (NULL != session->client)
{
GNUNET_SERVER_client_disconnect (session->client);
- GNUNET_SERVER_client_drop (session->client);
session->client = NULL;
}
- GNUNET_free_non_null (session->addr);
+ GNUNET_HELLO_address_free (session->address);
GNUNET_assert (NULL == session->transmit_handle);
GNUNET_free (session);
return GNUNET_OK;
/**
- * Session was idle, so disconnect it
+ * Function that is called to get the keepalive factor.
+ * #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
+ * calculate the interval between keepalive packets.
*
- * @param cls the `struct Session` of the idle session
- * @param tc scheduler context
+ * @param cls closure with the `struct Plugin`
+ * @return keepalive factor
+ */
+static unsigned int
+tcp_plugin_query_keepalive_factor (void *cls)
+{
+ return 3;
+}
+
+
+/**
+ * Session was idle for too long, so disconnect it
+ *
+ * @param cls the `struct GNUNET_ATS_Session` of the idle session
*/
static void
-session_timeout (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+session_timeout (void *cls)
{
- struct Session *s = cls;
+ struct GNUNET_ATS_Session *s = cls;
+ struct GNUNET_TIME_Relative left;
- s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Session %p was idle for %s, disconnecting\n",
- s,
- GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- GNUNET_YES));
+ s->timeout_task = NULL;
+ left = GNUNET_TIME_absolute_get_remaining (s->timeout);
+ if (0 != left.rel_value_us)
+ {
+ /* not actually our turn yet, but let's at least update
+ the monitor, it may think we're about to die ... */
+ notify_session_monitor (s->plugin,
+ s,
+ GNUNET_TRANSPORT_SS_UPDATE);
+ s->timeout_task = GNUNET_SCHEDULER_add_delayed (left,
+ &session_timeout,
+ s);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Session %p was idle for %s, disconnecting\n",
+ s,
+ GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
+ GNUNET_YES));
/* call session destroy function */
- tcp_disconnect_session (s->plugin, s);
+ tcp_plugin_disconnect_session (s->plugin,
+ s);
}
/**
- * Increment session timeout due to activity
+ * Increment session timeout due to activity.
*
* @param s session to increment timeout for
*/
static void
-reschedule_session_timeout (struct Session *s)
+reschedule_session_timeout (struct GNUNET_ATS_Session *s)
{
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
- GNUNET_SCHEDULER_cancel (s->timeout_task);
- s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- &session_timeout,
- s);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Timeout rescheduled for session %p set to %s\n",
- s,
- GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- GNUNET_YES));
+ GNUNET_assert (NULL != s->timeout_task);
+ s->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
}
* Create a new session. Also queues a welcome message.
*
* @param plugin the plugin
- * @param target peer to connect to
+ * @param address the address to create the session for
+ * @param scope network scope the address is from
* @param client client to use, reference counter must have already been increased
* @param is_nat this a NAT session, we should wait for a client to
* connect to us from an address, then assign that to
* the session
* @return new session object
*/
-static struct Session *
+static struct GNUNET_ATS_Session *
create_session (struct Plugin *plugin,
- const struct GNUNET_PeerIdentity *target,
- struct GNUNET_SERVER_Client *client, int is_nat)
+ const struct GNUNET_HELLO_Address *address,
+ enum GNUNET_ATS_Network_Type scope,
+ struct GNUNET_SERVER_Client *client,
+ int is_nat)
{
- struct Session *session;
+ struct GNUNET_ATS_Session *session;
struct PendingMessage *pm;
- struct WelcomeMessage welcome;
if (GNUNET_YES != is_nat)
GNUNET_assert (NULL != client);
GNUNET_assert (NULL == client);
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Creating new session for peer `%4s'\n",
- GNUNET_i2s (target));
- session = GNUNET_new (struct Session);
+ "Creating new session for peer `%s' at address %s\n",
+ GNUNET_i2s (&address->peer),
+ tcp_plugin_address_to_string (plugin,
+ address->address,
+ address->address_length));
+ session = GNUNET_new (struct GNUNET_ATS_Session);
session->last_activity = GNUNET_TIME_absolute_get ();
session->plugin = plugin;
session->is_nat = is_nat;
- session->client = client;
- session->target = *target;
+ if (NULL != client)
+ {
+ session->client = client;
+ GNUNET_SERVER_client_set_user_context (client,
+ session);
+ }
+ session->address = GNUNET_HELLO_address_copy (address);
+ session->target = address->peer;
session->expecting_welcome = GNUNET_YES;
- session->ats_address_network_type = GNUNET_ATS_NET_UNSPECIFIED;
+ session->scope = scope;
pm = GNUNET_malloc (sizeof (struct PendingMessage) +
- sizeof (struct WelcomeMessage));
+ sizeof (struct WelcomeMessage));
pm->msg = (const char *) &pm[1];
- pm->message_size = sizeof (struct WelcomeMessage);
- welcome.header.size = htons (sizeof (struct WelcomeMessage));
- welcome.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME);
- welcome.clientIdentity = *plugin->env->my_identity;
- memcpy (&pm[1], &welcome, sizeof (welcome));
+ pm->message_size = sizeof(struct WelcomeMessage);
+ GNUNET_memcpy (&pm[1],
+ &plugin->my_welcome,
+ sizeof(struct WelcomeMessage));
pm->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
GNUNET_STATISTICS_update (plugin->env->stats,
gettext_noop ("# bytes currently in TCP buffers"),
- pm->message_size, GNUNET_NO);
+ pm->message_size,
+ GNUNET_NO);
GNUNET_CONTAINER_DLL_insert (session->pending_messages_head,
- session->pending_messages_tail, pm);
+ session->pending_messages_tail,
+ pm);
+ session->msgs_in_queue++;
+ session->bytes_in_queue += pm->message_size;
+ session->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
+ session->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
+ &session_timeout,
+ session);
+ notify_session_monitor (session->plugin,
+ session,
+ GNUNET_TRANSPORT_SS_INIT);
if (GNUNET_YES != is_nat)
{
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# TCP sessions active"), 1,
+ gettext_noop ("# TCP sessions active"),
+ 1,
GNUNET_NO);
+ notify_session_monitor (session->plugin,
+ session,
+ GNUNET_TRANSPORT_SS_UP);
+ }
+ else
+ {
+ notify_session_monitor (session->plugin,
+ session,
+ GNUNET_TRANSPORT_SS_HANDSHAKE);
}
- session->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- &session_timeout,
- session);
return session;
}
* @param session for which session should we do this
*/
static void
-process_pending_messages (struct Session *session);
+process_pending_messages (struct GNUNET_ATS_Session *session);
/**
* writing in the meantime.
*
* @param cls closure
- * @param size number of bytes available in buf
+ * @param size number of bytes available in @a buf
* @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * @return number of bytes written to @a buf
*/
static size_t
-do_transmit (void *cls, size_t size, void *buf)
+do_transmit (void *cls,
+ size_t size,
+ void *buf)
{
- struct Session *session = cls;
+ struct GNUNET_ATS_Session *session = cls;
struct GNUNET_PeerIdentity pid;
struct Plugin *plugin;
struct PendingMessage *pos;
char *cbuf;
size_t ret;
- GNUNET_assert (NULL != session);
session->transmit_handle = NULL;
plugin = session->plugin;
if (NULL == buf)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Timeout trying to transmit to peer `%4s', discarding message queue.\n",
- GNUNET_i2s (&session->target));
+ "Timeout trying to transmit to peer `%s', discarding message queue.\n",
+ GNUNET_i2s (&session->target));
/* timeout; cancel all messages that have already expired */
hd = NULL;
tl = NULL;
ret = 0;
now = GNUNET_TIME_absolute_get ();
- while ((NULL != (pos = session->pending_messages_head)) &&
- (pos->timeout.abs_value_us <= now.abs_value_us))
+ while ( (NULL != (pos = session->pending_messages_head)) &&
+ (pos->timeout.abs_value_us <= now.abs_value_us) )
{
GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
- session->pending_messages_tail, pos);
+ session->pending_messages_tail,
+ pos);
+ GNUNET_assert (0 < session->msgs_in_queue);
+ session->msgs_in_queue--;
+ GNUNET_assert (pos->message_size <= session->bytes_in_queue);
+ session->bytes_in_queue -= pos->message_size;
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Failed to transmit %u byte message to `%4s'.\n",
- pos->message_size, GNUNET_i2s (&session->target));
+ "Failed to transmit %u byte message to `%s'.\n",
+ pos->message_size,
+ GNUNET_i2s (&session->target));
ret += pos->message_size;
- GNUNET_CONTAINER_DLL_insert_after (hd, tl, tl, pos);
+ GNUNET_CONTAINER_DLL_insert_after (hd,
+ tl,
+ tl,
+ pos);
}
/* do this call before callbacks (so that if callbacks destroy
* session, they have a chance to cancel actions done by this
* the callbacks may abort the session */
while (NULL != (pos = hd))
{
- GNUNET_CONTAINER_DLL_remove (hd, tl, pos);
- if (pos->transmit_cont != NULL)
- pos->transmit_cont (pos->transmit_cont_cls, &pid, GNUNET_SYSERR, pos->message_size, 0);
+ GNUNET_CONTAINER_DLL_remove (hd,
+ tl,
+ pos);
+ if (NULL != pos->transmit_cont)
+ pos->transmit_cont (pos->transmit_cont_cls,
+ &pid,
+ GNUNET_SYSERR,
+ pos->message_size,
+ 0);
GNUNET_free (pos);
}
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes currently in TCP buffers"),
- -(int64_t) ret, GNUNET_NO);
+ gettext_noop ("# bytes currently in TCP buffers"), -(int64_t) ret,
+ GNUNET_NO);
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop
- ("# bytes discarded by TCP (timeout)"), ret,
+ gettext_noop ("# bytes discarded by TCP (timeout)"),
+ ret,
GNUNET_NO);
+ if (0 < ret)
+ notify_session_monitor (session->plugin,
+ session,
+ GNUNET_TRANSPORT_SS_UPDATE);
return 0;
}
/* copy all pending messages that would fit */
if (ret + pos->message_size > size)
break;
GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
- session->pending_messages_tail, pos);
- GNUNET_assert (size >= pos->message_size);
+ session->pending_messages_tail,
+ pos);
+ GNUNET_assert (0 < session->msgs_in_queue);
+ session->msgs_in_queue--;
+ GNUNET_assert (pos->message_size <= session->bytes_in_queue);
+ session->bytes_in_queue -= pos->message_size;
+ GNUNET_assert(size >= pos->message_size);
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Transmitting message of type %u\n",
- ntohs (((struct GNUNET_MessageHeader *) pos->msg)->type));
- /* FIXME: this memcpy can be up to 7% of our total runtime */
- memcpy (cbuf, pos->msg, pos->message_size);
+ "Transmitting message of type %u size %u to peer %s at %s\n",
+ ntohs (((struct GNUNET_MessageHeader *) pos->msg)->type),
+ pos->message_size,
+ GNUNET_i2s (&session->target),
+ tcp_plugin_address_to_string (session->plugin,
+ session->address->address,
+ session->address->address_length));
+ /* FIXME: this GNUNET_memcpy can be up to 7% of our total runtime */
+ GNUNET_memcpy (cbuf,
+ pos->msg,
+ pos->message_size);
cbuf += pos->message_size;
ret += pos->message_size;
size -= pos->message_size;
- GNUNET_CONTAINER_DLL_insert_tail (hd, tl, pos);
+ GNUNET_CONTAINER_DLL_insert_tail (hd,
+ tl,
+ pos);
}
+ notify_session_monitor (session->plugin,
+ session,
+ GNUNET_TRANSPORT_SS_UPDATE);
/* schedule 'continuation' before callbacks so that callbacks that
* cancel everything don't cause us to use a session that no longer
* exists... */
while (NULL != (pos = hd))
{
GNUNET_CONTAINER_DLL_remove (hd, tl, pos);
- if (pos->transmit_cont != NULL)
- pos->transmit_cont (pos->transmit_cont_cls, &pid, GNUNET_OK, pos->message_size, pos->message_size); /* FIXME: include TCP overhead */
+ if (NULL != pos->transmit_cont)
+ pos->transmit_cont (pos->transmit_cont_cls,
+ &pid,
+ GNUNET_OK,
+ pos->message_size,
+ pos->message_size); /* FIXME: include TCP overhead */
GNUNET_free (pos);
}
- GNUNET_assert (hd == NULL);
- GNUNET_assert (tl == NULL);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Transmitting %u bytes\n",
- ret);
+ GNUNET_assert (NULL == hd);
+ GNUNET_assert (NULL == tl);
GNUNET_STATISTICS_update (plugin->env->stats,
gettext_noop ("# bytes currently in TCP buffers"),
- -(int64_t) ret, GNUNET_NO);
+ - (int64_t) ret,
+ GNUNET_NO);
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes transmitted via TCP"), ret,
+ gettext_noop ("# bytes transmitted via TCP"),
+ ret,
GNUNET_NO);
return ret;
}
* @param session for which session should we do this
*/
static void
-process_pending_messages (struct Session *session)
+process_pending_messages (struct GNUNET_ATS_Session *session)
{
struct PendingMessage *pm;
- GNUNET_assert (session->client != NULL);
- if (session->transmit_handle != NULL)
+ GNUNET_assert (NULL != session->client);
+ if (NULL != session->transmit_handle)
return;
if (NULL == (pm = session->pending_messages_head))
return;
- session->transmit_handle =
- GNUNET_SERVER_notify_transmit_ready (session->client, pm->message_size,
- GNUNET_TIME_absolute_get_remaining
- (pm->timeout), &do_transmit,
+ session->transmit_handle
+ = GNUNET_SERVER_notify_transmit_ready (session->client,
+ pm->message_size,
+ GNUNET_TIME_absolute_get_remaining (pm->timeout),
+ &do_transmit,
session);
}
-#if EXTRA_CHECKS
-/**
- * Closure for #session_it().
- */
-struct FindSessionContext
-{
- /**
- * Session we are looking for.
- */
- struct Session *s;
-
- /**
- * Set to #GNUNET_OK if we found the session.
- */
- int res;
-};
-
-
-/**
- * Function called to check if a session is in our maps.
- *
- * @param cls the `struct FindSessionContext`
- * @param key peer identity
- * @param value session in the map
- * @return #GNUNET_YES to continue looking, #GNUNET_NO if we found the session
- */
-static int
-session_it (void *cls,
- const struct GNUNET_PeerIdentity *key,
- void *value)
-{
- struct FindSessionContext *res = cls;
- struct Session *session = value;
-
- if (res->s == session)
- {
- res->res = GNUNET_OK;
- return GNUNET_NO;
- }
- return GNUNET_YES;
-}
-
-
-/**
- * Check that the given session is known to the plugin and
- * is in one of our maps.
- *
- * @param plugin the plugin to check against
- * @param session the session to check
- * @return #GNUNET_OK if all is well, #GNUNET_SYSERR if the session is invalid
- */
-static int
-find_session (struct Plugin *plugin,
- struct Session *session)
-{
- struct FindSessionContext session_map_res;
- struct FindSessionContext nat_map_res;
-
- session_map_res.s = session;
- session_map_res.res = GNUNET_SYSERR;
- GNUNET_CONTAINER_multipeermap_iterate (plugin->sessionmap,
- &session_it, &session_map_res);
- if (GNUNET_SYSERR != session_map_res.res)
- return GNUNET_OK;
- nat_map_res.s = session;
- nat_map_res.res = GNUNET_SYSERR;
- GNUNET_CONTAINER_multipeermap_iterate (plugin->nat_wait_conns,
- &session_it, &nat_map_res);
- if (GNUNET_SYSERR != nat_map_res.res)
- return GNUNET_OK;
- GNUNET_break (0);
- return GNUNET_SYSERR;
-}
-#endif
-
-
/**
* Function that can be used by the transport service to transmit
* a message using the plugin. Note that in the case of a
* @param cls closure
* @param session which session must be used
* @param msgbuf the message to transmit
- * @param msgbuf_size number of bytes in 'msgbuf'
+ * @param msgbuf_size number of bytes in @a msgbuf
* @param priority how important is the message (most plugins will
* ignore message priority and just FIFO)
* @param to how long to wait at most for the transmission (does not
*/
static ssize_t
tcp_plugin_send (void *cls,
- struct Session *session,
- const char *msgbuf, size_t msgbuf_size,
+ struct GNUNET_ATS_Session *session,
+ const char *msgbuf,
+ size_t msgbuf_size,
unsigned int priority,
struct GNUNET_TIME_Relative to,
- GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
+ GNUNET_TRANSPORT_TransmitContinuation cont,
+ void *cont_cls)
{
struct Plugin * plugin = cls;
struct PendingMessage *pm;
-#if EXTRA_CHECKS
- if (GNUNET_SYSERR == find_session (plugin, session))
- {
- LOG (GNUNET_ERROR_TYPE_ERROR,
- _("Trying to send with invalid session %p\n"));
- GNUNET_assert (0);
- return GNUNET_SYSERR;
- }
-#endif
/* create new message entry */
pm = GNUNET_malloc (sizeof (struct PendingMessage) + msgbuf_size);
pm->msg = (const char *) &pm[1];
- memcpy (&pm[1], msgbuf, msgbuf_size);
+ GNUNET_memcpy (&pm[1], msgbuf, msgbuf_size);
pm->message_size = msgbuf_size;
pm->timeout = GNUNET_TIME_relative_to_absolute (to);
pm->transmit_cont = cont;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Asked to transmit %u bytes to `%s', added message to list.\n",
- msgbuf_size, GNUNET_i2s (&session->target));
+ msgbuf_size,
+ GNUNET_i2s (&session->target));
if (GNUNET_YES ==
GNUNET_CONTAINER_multipeermap_contains_value (plugin->sessionmap,
&session->target,
session))
{
- GNUNET_assert (session->client != NULL);
- reschedule_session_timeout (session);
+ GNUNET_assert (NULL != session->client);
GNUNET_SERVER_client_set_timeout (session->client,
GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
GNUNET_STATISTICS_update (plugin->env->stats,
gettext_noop ("# bytes currently in TCP buffers"),
- msgbuf_size, GNUNET_NO);
+ msgbuf_size,
+ GNUNET_NO);
/* append pm to pending_messages list */
GNUNET_CONTAINER_DLL_insert_tail (session->pending_messages_head,
- session->pending_messages_tail, pm);
-
+ session->pending_messages_tail,
+ pm);
+ notify_session_monitor (session->plugin,
+ session,
+ GNUNET_TRANSPORT_SS_UPDATE);
+ session->msgs_in_queue++;
+ session->bytes_in_queue += pm->message_size;
process_pending_messages (session);
return msgbuf_size;
}
- else if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains_value(plugin->nat_wait_conns, &session->target, session))
+ if (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_contains_value (plugin->nat_wait_conns,
+ &session->target,
+ session))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "This NAT WAIT session for peer `%s' is not yet ready!\n",
- GNUNET_i2s (&session->target));
- reschedule_session_timeout (session);
+ "This NAT WAIT session for peer `%s' is not yet ready!\n",
+ GNUNET_i2s (&session->target));
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes currently in TCP buffers"),
- msgbuf_size, GNUNET_NO);
-
+ gettext_noop ("# bytes currently in TCP buffers"), msgbuf_size,
+ GNUNET_NO);
/* append pm to pending_messages list */
GNUNET_CONTAINER_DLL_insert_tail (session->pending_messages_head,
- session->pending_messages_tail, pm);
+ session->pending_messages_tail,
+ pm);
+ session->msgs_in_queue++;
+ session->bytes_in_queue += pm->message_size;
+ notify_session_monitor (session->plugin,
+ session,
+ GNUNET_TRANSPORT_SS_HANDSHAKE);
return msgbuf_size;
}
- else
- {
- LOG (GNUNET_ERROR_TYPE_ERROR,
- "Invalid session %p\n", session);
- if (NULL != cont)
- cont (cont_cls, &session->target, GNUNET_SYSERR, pm->message_size, 0);
- GNUNET_break (0);
- GNUNET_free (pm);
- return GNUNET_SYSERR; /* session does not exist here */
- }
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "Invalid session %p\n",
+ session);
+ if (NULL != cont)
+ cont (cont_cls,
+ &session->target,
+ GNUNET_SYSERR,
+ pm->message_size,
+ 0);
+ GNUNET_break (0);
+ GNUNET_free (pm);
+ return GNUNET_SYSERR; /* session does not exist here */
}
/**
* Closure for #session_lookup_it().
*/
-struct SessionItCtx
+struct GNUNET_ATS_SessionItCtx
{
/**
* Address we are looking for.
*/
- void *addr;
-
- /**
- * Number of bytes in @e addr.
- */
- size_t addrlen;
+ const struct GNUNET_HELLO_Address *address;
/**
* Where to store the session (if we found it).
*/
- struct Session *result;
+ struct GNUNET_ATS_Session *result;
+
};
/**
* Look for a session by address.
*
- * @param cls the `struct SessionItCtx`
+ * @param cls the `struct GNUNET_ATS_SessionItCtx`
* @param key unused
- * @param value a `struct Session`
+ * @param value a `struct GNUNET_ATS_Session`
* @return #GNUNET_YES to continue looking, #GNUNET_NO if we found the session
*/
static int
session_lookup_it (void *cls,
- const struct GNUNET_PeerIdentity *key,
- void *value)
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- struct SessionItCtx * si_ctx = cls;
- struct Session * session = value;
-#if 0
- char * a1 = strdup (tcp_address_to_string(NULL, session->addr, session->addrlen));
- char * a2 = strdup (tcp_address_to_string(NULL, si_ctx->addr, si_ctx->addrlen));
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Comparing: %s %u <-> %s %u\n",
- a1,
- session->addrlen,
- a2,
- si_ctx->addrlen);
- GNUNET_free (a1);
- GNUNET_free (a2);
-#endif
- if (session->addrlen != si_ctx->addrlen)
- return GNUNET_YES;
- if (0 != memcmp (session->addr, si_ctx->addr, si_ctx->addrlen))
+ struct GNUNET_ATS_SessionItCtx *si_ctx = cls;
+ struct GNUNET_ATS_Session *session = value;
+
+ if (0 !=
+ GNUNET_HELLO_address_cmp (si_ctx->address,
+ session->address))
return GNUNET_YES;
-#if 0
- a1 = strdup (tcp_address_to_string (NULL, session->addr, session->addrlen));
- a2 = strdup (tcp_address_to_string (NULL, si_ctx->addr, si_ctx->addrlen));
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Comparing: %s %u <-> %s %u , OK!\n",
- a1,
- session->addrlen,
- a2,
- si_ctx->addrlen);
- GNUNET_free (a1);
- GNUNET_free (a2);
-#endif
- /* Found existing session */
si_ctx->result = session;
return GNUNET_NO;
}
/**
* Task cleaning up a NAT connection attempt after timeout
*
- * @param cls the `struct Session`
- * @param tc scheduler context (unused)
+ * @param cls the `struct GNUNET_ATS_Session`
*/
static void
-nat_connect_timeout (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+nat_connect_timeout (void *cls)
{
- struct Session *session = cls;
+ struct GNUNET_ATS_Session *session = cls;
- session->nat_connection_timeout = GNUNET_SCHEDULER_NO_TASK;
+ session->nat_connection_timeout = NULL;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"NAT WAIT connection to `%4s' at `%s' could not be established, removing session\n",
GNUNET_i2s (&session->target),
- tcp_address_to_string (NULL,
- session->addr, session->addrlen));
- tcp_disconnect_session (session->plugin,
- session);
+ tcp_plugin_address_to_string (session->plugin,
+ session->address->address,
+ session->address->address_length));
+ tcp_plugin_disconnect_session (session->plugin,
+ session);
+}
+
+
+/**
+ * Function that will be called whenever the transport service wants to
+ * notify the plugin that a session is still active and in use and
+ * therefore the session timeout for this session has to be updated
+ *
+ * @param cls closure
+ * @param peer which peer was the session for
+ * @param session which session is being updated
+ */
+static void
+tcp_plugin_update_session_timeout (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ struct GNUNET_ATS_Session *session)
+{
+ reschedule_session_timeout (session);
+}
+
+
+/**
+ * Task to signal the server that we can continue
+ * receiving from the TCP client now.
+ *
+ * @param cls the `struct GNUNET_ATS_Session *`
+ */
+static void
+delayed_done (void *cls)
+{
+ struct GNUNET_ATS_Session *session = cls;
+
+ session->receive_delay_task = NULL;
+ reschedule_session_timeout (session);
+ GNUNET_SERVER_receive_done (session->client,
+ GNUNET_OK);
+}
+
+
+/**
+ * Function that will be called whenever the transport service wants to
+ * notify the plugin that the inbound quota changed and that the plugin
+ * should update it's delay for the next receive value
+ *
+ * @param cls closure
+ * @param peer which peer was the session for
+ * @param session which session is being updated
+ * @param delay new delay to use for receiving
+ */
+static void
+tcp_plugin_update_inbound_delay (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ struct GNUNET_ATS_Session *session,
+ struct GNUNET_TIME_Relative delay)
+{
+ if (NULL == session->receive_delay_task)
+ return;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "New inbound delay %s\n",
+ GNUNET_STRINGS_relative_time_to_string (delay,
+ GNUNET_NO));
+ session->receive_delay = GNUNET_TIME_relative_to_absolute (delay);
+ GNUNET_SCHEDULER_cancel (session->receive_delay_task);
+ session->receive_delay_task = GNUNET_SCHEDULER_add_delayed (delay,
+ &delayed_done,
+ session);
}
* @param address the address to use
* @return the session if the address is valid, NULL otherwise
*/
-static struct Session *
+static struct GNUNET_ATS_Session *
tcp_plugin_get_session (void *cls,
- const struct GNUNET_HELLO_Address *address)
+ const struct GNUNET_HELLO_Address *address)
{
struct Plugin *plugin = cls;
- struct Session *session = NULL;
+ struct GNUNET_ATS_Session *session = NULL;
int af;
const void *sb;
size_t sbs;
struct sockaddr_in6 a6;
const struct IPv4TcpAddress *t4;
const struct IPv6TcpAddress *t6;
- struct GNUNET_ATS_Information ats;
+ unsigned int options;
+ enum GNUNET_ATS_Network_Type net_type;
unsigned int is_natd = GNUNET_NO;
size_t addrlen;
+#ifdef TCP_STEALTH
+ struct GNUNET_NETWORK_Handle *s;
+#endif
addrlen = address->address_length;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Trying to get session for `%s' address of peer `%s'\n",
- tcp_address_to_string(NULL, address->address, address->address_length),
+ tcp_plugin_address_to_string (plugin,
+ address->address,
+ address->address_length),
GNUNET_i2s (&address->peer));
+ if (GNUNET_HELLO_address_check_option (address,
+ GNUNET_HELLO_ADDRESS_INFO_INBOUND))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+
/* look for existing session */
if (GNUNET_YES ==
GNUNET_CONTAINER_multipeermap_contains (plugin->sessionmap,
- &address->peer))
+ &address->peer))
{
- struct SessionItCtx si_ctx;
-
- si_ctx.addr = (void *) address->address;
- si_ctx.addrlen = address->address_length;
+ struct GNUNET_ATS_SessionItCtx si_ctx;
+ si_ctx.address = address;
si_ctx.result = NULL;
-
GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessionmap,
- &address->peer,
- &session_lookup_it, &si_ctx);
- if (si_ctx.result != NULL)
+ &address->peer,
+ &session_lookup_it,
+ &si_ctx);
+ if (NULL != si_ctx.result)
{
session = si_ctx.result;
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Found existing session for `%s' address `%s' session %p\n",
- GNUNET_i2s (&address->peer),
- tcp_address_to_string(NULL, address->address, address->address_length),
- session);
+ "Found existing session for `%s' address `%s'\n",
+ GNUNET_i2s (&address->peer),
+ tcp_plugin_address_to_string (plugin,
+ address->address,
+ address->address_length));
return session;
}
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Existing sessions did not match address `%s' or peer `%s'\n",
- tcp_address_to_string(NULL, address->address, address->address_length),
- GNUNET_i2s (&address->peer));
+ /* This is a bit of a hack, limiting TCP to never allow more than
+ one TCP connection to any given peer at the same time.
+ Without this, peers sometimes disagree about which of the TCP
+ connections they should use, causing one side to believe that
+ they transmit successfully, while the other receives nothing. */
+ return NULL; /* Refuse to have more than one TCP connection per
+ peer pair at the same time. */
}
- if (addrlen == sizeof (struct IPv6TcpAddress))
+ if (addrlen == sizeof(struct IPv6TcpAddress))
{
- GNUNET_assert (NULL != address->address); /* make static analysis happy */
+ GNUNET_assert (NULL != address->address); /* make static analysis happy */
t6 = address->address;
+ options = t6->options;
af = AF_INET6;
- memset (&a6, 0, sizeof (a6));
+ memset (&a6, 0, sizeof(a6));
#if HAVE_SOCKADDR_IN_SIN_LEN
a6.sin6_len = sizeof (a6);
#endif
a6.sin6_port = t6->t6_port;
if (t6->t6_port == 0)
is_natd = GNUNET_YES;
- memcpy (&a6.sin6_addr, &t6->ipv6_addr, sizeof (struct in6_addr));
+ GNUNET_memcpy (&a6.sin6_addr, &t6->ipv6_addr, sizeof(struct in6_addr));
sb = &a6;
- sbs = sizeof (a6);
+ sbs = sizeof(a6);
}
- else if (addrlen == sizeof (struct IPv4TcpAddress))
+ else if (addrlen == sizeof(struct IPv4TcpAddress))
{
- GNUNET_assert (NULL != address->address); /* make static analysis happy */
+ GNUNET_assert(NULL != address->address); /* make static analysis happy */
t4 = address->address;
+ options = t4->options;
af = AF_INET;
- memset (&a4, 0, sizeof (a4));
+ memset (&a4, 0, sizeof(a4));
#if HAVE_SOCKADDR_IN_SIN_LEN
a4.sin_len = sizeof (a4);
#endif
is_natd = GNUNET_YES;
a4.sin_addr.s_addr = t4->ipv4_addr;
sb = &a4;
- sbs = sizeof (a4);
+ sbs = sizeof(a4);
}
else
{
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop
- ("# requests to create session with invalid address"),
- 1, GNUNET_NO);
+ gettext_noop ("# requests to create session with invalid address"),
+ 1,
+ GNUNET_NO);
return NULL;
}
- ats = plugin->env->get_address_type (plugin->env->cls, sb, sbs);
+ net_type = plugin->env->get_address_type (plugin->env->cls,
+ sb,
+ sbs);
+ GNUNET_break (net_type != GNUNET_ATS_NET_UNSPECIFIED);
- if ((is_natd == GNUNET_YES) && (addrlen == sizeof (struct IPv6TcpAddress)))
+ if ( (is_natd == GNUNET_YES) &&
+ (addrlen == sizeof(struct IPv6TcpAddress)) )
{
/* NAT client only works with IPv4 addresses */
return NULL;
return NULL;
}
- if ((is_natd == GNUNET_YES) &&
- (GNUNET_YES ==
- GNUNET_CONTAINER_multipeermap_contains (plugin->nat_wait_conns,
- &address->peer)))
+ if ( (is_natd == GNUNET_YES) &&
+ (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_contains (plugin->nat_wait_conns,
+ &address->peer)))
{
/* Only do one NAT punch attempt per peer identity */
- return NULL;
+ return NULL;
}
- if ((is_natd == GNUNET_YES) && (NULL != plugin->nat) &&
- (GNUNET_NO ==
- GNUNET_CONTAINER_multipeermap_contains (plugin->nat_wait_conns,
- &address->peer)))
+ if ( (is_natd == GNUNET_YES) &&
+ (NULL != plugin->nat) &&
+ (GNUNET_NO ==
+ GNUNET_CONTAINER_multipeermap_contains (plugin->nat_wait_conns,
+ &address->peer)))
{
+ struct sockaddr_in local_sa;
+
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Found valid IPv4 NAT address (creating session)!\n") ;
+ "Found valid IPv4 NAT address (creating session)!\n");
session = create_session (plugin,
- &address->peer,
+ address,
+ net_type,
NULL,
GNUNET_YES);
- session->addrlen = 0;
- session->addr = NULL;
- session->ats_address_network_type = (enum GNUNET_ATS_Network_Type) ntohl (ats.value)
-;
- GNUNET_break (session->ats_address_network_type != GNUNET_ATS_NET_UNSPECIFIED);
session->nat_connection_timeout = GNUNET_SCHEDULER_add_delayed (NAT_TIMEOUT,
- &nat_connect_timeout,
- session);
- GNUNET_assert (session != NULL);
+ &nat_connect_timeout,
+ session);
GNUNET_assert (GNUNET_OK ==
- GNUNET_CONTAINER_multipeermap_put (plugin->nat_wait_conns,
- &session->target,
- session,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ GNUNET_CONTAINER_multipeermap_put (plugin->nat_wait_conns,
+ &session->target,
+ session,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Created NAT WAIT connection to `%4s' at `%s'\n",
- GNUNET_i2s (&session->target), GNUNET_a2s (sb, sbs));
-
- if (GNUNET_OK == GNUNET_NAT_run_client (plugin->nat, &a4))
+ "Created NAT WAIT connection to `%s' at `%s'\n",
+ GNUNET_i2s (&session->target),
+ GNUNET_a2s (sb, sbs));
+ memset (&local_sa,
+ 0,
+ sizeof (local_sa));
+ local_sa.sin_family = AF_INET;
+ local_sa.sin_port = htons (plugin->open_port);
+ /* We leave sin_address at 0, let the kernel figure it out,
+ even if our bind() is more specific. (May want to reconsider
+ later.) */
+ if (GNUNET_OK ==
+ GNUNET_NAT_request_reversal (plugin->nat,
+ &local_sa,
+ &a4))
return session;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Running NAT client for `%s' at `%s' failed\n",
+ GNUNET_i2s (&session->target),
+ GNUNET_a2s (sb, sbs));
+ tcp_plugin_disconnect_session (plugin,
+ session);
+ return NULL;
+ }
+
+ /* create new outbound session */
+ if (0 != (options & TCP_OPTIONS_TCP_STEALTH))
+ {
+#ifdef TCP_STEALTH
+ s = GNUNET_NETWORK_socket_create (af, SOCK_STREAM, 0);
+ if (NULL == s)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
+ "socket");
+ sa = NULL;
+ }
else
{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Running NAT client for `%4s' at `%s' failed\n",
- GNUNET_i2s (&session->target), GNUNET_a2s (sb, sbs));
- tcp_disconnect_session (plugin, session);
- return NULL;
+ if ( (GNUNET_OK !=
+ GNUNET_NETWORK_socket_setsockopt (s,
+ IPPROTO_TCP,
+ TCP_STEALTH,
+ &session->target,
+ sizeof (struct GNUNET_PeerIdentity))) ||
+ (GNUNET_OK !=
+ GNUNET_NETWORK_socket_setsockopt (s,
+ IPPROTO_TCP,
+ TCP_STEALTH_INTEGRITY,
+ &plugin->my_welcome,
+ sizeof (struct WelcomeMessage))) )
+ {
+ /* TCP STEALTH not supported by kernel */
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_NETWORK_socket_close (s));
+ sa = NULL;
+ }
+ else
+ {
+ sa = GNUNET_CONNECTION_connect_socket (s, sb, sbs);
+ }
}
+#else
+ sa = NULL;
+#endif
}
-
- /* create new outbound session */
- GNUNET_assert (plugin->cur_connections <= plugin->max_connections);
- sa = GNUNET_CONNECTION_create_from_sockaddr (af, sb, sbs);
- if (sa == NULL)
+ else
+ {
+ sa = GNUNET_CONNECTION_create_from_sockaddr (af, sb, sbs);
+ }
+ if (NULL == sa)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Failed to create connection to `%4s' at `%s'\n",
- GNUNET_i2s (&address->peer), GNUNET_a2s (sb, sbs));
+ "Failed to create connection to `%s' at `%s'\n",
+ GNUNET_i2s (&address->peer),
+ GNUNET_a2s (sb, sbs));
return NULL;
}
- plugin->cur_connections++;
- if (plugin->cur_connections == plugin->max_connections)
- GNUNET_SERVER_suspend (plugin->server); /* Maximum number of connections rechead */
-
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Asked to transmit to `%4s', creating fresh session using address `%s'.\n",
+ "Asked to transmit to `%s', creating fresh session using address `%s'.\n",
GNUNET_i2s (&address->peer),
GNUNET_a2s (sb, sbs));
session = create_session (plugin,
- &address->peer,
- GNUNET_SERVER_connect_socket (plugin->server, sa),
+ address,
+ net_type,
+ GNUNET_SERVER_connect_socket (plugin->server,
+ sa),
GNUNET_NO);
- session->addr = GNUNET_malloc (addrlen);
- memcpy (session->addr, address->address, addrlen);
- session->addrlen = addrlen;
- session->ats_address_network_type = (enum GNUNET_ATS_Network_Type) ntohl (ats.value);
- GNUNET_break (session->ats_address_network_type != GNUNET_ATS_NET_UNSPECIFIED);
- GNUNET_SERVER_client_set_user_context (session->client, session);
- GNUNET_CONTAINER_multipeermap_put (plugin->sessionmap,
- &session->target,
- session,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Creating new session for `%s' address `%s' session %p\n",
- GNUNET_i2s (&address->peer),
- tcp_address_to_string(NULL, address->address, address->address_length),
- session);
+ (void) GNUNET_CONTAINER_multipeermap_put (plugin->sessionmap,
+ &session->target,
+ session,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
/* Send TCP Welcome */
process_pending_messages (session);
}
+/**
+ * We have been asked to destroy all connections to a particular peer.
+ * This function is called on each applicable session and must tear it
+ * down.
+ *
+ * @param cls the `struct Plugin *`
+ * @param key the peer which the session belongs to (unused)
+ * @param value the `struct GNUNET_ATS_Session`
+ * @return #GNUNET_YES (continue to iterate)
+ */
static int
session_disconnect_it (void *cls,
- const struct GNUNET_PeerIdentity *key,
- void *value)
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
struct Plugin *plugin = cls;
- struct Session *session = value;
+ struct GNUNET_ATS_Session *session = value;
GNUNET_STATISTICS_update (session->plugin->env->stats,
- gettext_noop
- ("# transport-service disconnect requests for TCP"),
- 1, GNUNET_NO);
- tcp_disconnect_session (plugin,
- session);
+ gettext_noop ("# transport-service disconnect requests for TCP"),
+ 1,
+ GNUNET_NO);
+ tcp_plugin_disconnect_session (plugin,
+ session);
return GNUNET_YES;
}
* to close the connection (if applicable) and no longer call the
* transmit continuation(s).
*
- * Finally, plugin MUST NOT call the services's receive function to
- * notify the service that the connection to the specified target was
- * closed after a getting this call.
- *
- * @param cls closure
- * @param target peer for which the last transmission is
- * to be cancelled
- */
-static void
-tcp_plugin_disconnect (void *cls,
- const struct GNUNET_PeerIdentity *target)
-{
- struct Plugin *plugin = cls;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Disconnecting peer `%4s'\n",
- GNUNET_i2s (target));
- GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessionmap, target,
- &session_disconnect_it, plugin);
- GNUNET_CONTAINER_multipeermap_get_multiple (plugin->nat_wait_conns, target,
- &session_disconnect_it, plugin);
-}
-
-
-/**
- * Running pretty printers: head
- */
-static struct PrettyPrinterContext *ppc_dll_head;
-
-/**
- * Running pretty printers: tail
- */
-static struct PrettyPrinterContext *ppc_dll_tail;
-
-/**
- * Context for address to string conversion.
- */
-struct PrettyPrinterContext
-{
- /**
- * DLL
- */
- struct PrettyPrinterContext *next;
-
- /**
- * DLL
- */
- struct PrettyPrinterContext *prev;
-
- /**
- * Timeout task
- */
- GNUNET_SCHEDULER_TaskIdentifier timeout_task;
-
- /**
- * Resolver handle
- */
- struct GNUNET_RESOLVER_RequestHandle *resolver_handle;
-
- /**
- * Function to call with the result.
- */
- GNUNET_TRANSPORT_AddressStringCallback asc;
-
- /**
- * Clsoure for 'asc'.
- */
- void *asc_cls;
-
- /**
- * Port to add after the IP address.
- */
- uint16_t port;
-
- /**
- * IPv6 address
- */
- int ipv6;
-
- /**
- * Options
- */
- uint32_t options;
-};
-
-
+ * Finally, plugin MUST NOT call the services's receive function to
+ * notify the service that the connection to the specified target was
+ * closed after a getting this call.
+ *
+ * @param cls closure
+ * @param target peer for which the last transmission is
+ * to be cancelled
+ */
static void
-ppc_cancel_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+tcp_plugin_disconnect (void *cls,
+ const struct GNUNET_PeerIdentity *target)
{
- int count = 0;
- struct PrettyPrinterContext *ppc = cls;
- struct PrettyPrinterContext *cur;
-
- for (cur = ppc_dll_head; (NULL != cur); cur = cur->next)
- {
- if (cur != ppc)
- count++;
- }
+ struct Plugin *plugin = cls;
- // GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Cancel request %p, %u pending\n", ppc, count);
- ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- if (NULL != ppc->resolver_handle)
- {
- GNUNET_RESOLVER_request_cancel (ppc->resolver_handle);
- ppc->resolver_handle = NULL;
- }
- GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
- GNUNET_free (ppc);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Disconnecting peer `%s'\n",
+ GNUNET_i2s (target));
+ GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessionmap,
+ target,
+ &session_disconnect_it,
+ plugin);
+ GNUNET_CONTAINER_multipeermap_get_multiple (plugin->nat_wait_conns,
+ target,
+ &session_disconnect_it,
+ plugin);
}
/**
- * Append our port and forward the result.
+ * We are processing an address pretty printing request and finished
+ * the IP resolution (if applicable). Append our port and forward the
+ * result. If called with @a hostname NULL, we are done and should
+ * clean up the pretty printer (otherwise, there might be multiple
+ * hostnames for the IP address and we might receive more).
*
- * @param cls the 'struct PrettyPrinterContext*'
+ * @param cls the `struct PrettyPrinterContext *`
* @param hostname hostname part of the address
*/
static void
-append_port (void *cls, const char *hostname)
+append_port (void *cls,
+ const char *hostname)
{
struct PrettyPrinterContext *ppc = cls;
- struct PrettyPrinterContext *cur;
+ struct Plugin *plugin = ppc->plugin;
char *ret;
- int count = 0;
- for (cur = ppc_dll_head; (NULL != cur); cur = cur->next)
- {
- if (cur != ppc)
- count++;
- }
- //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Callback request %p == %s, %u pending\n", ppc, hostname, count);
- if (hostname == NULL)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "append_port called with hostname `%s'\n",
+ hostname);
+ if (NULL == hostname)
{
- ppc->asc (ppc->asc_cls, NULL);
- GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
- GNUNET_SCHEDULER_cancel (ppc->timeout_task);
- ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ /* Final call, done */
ppc->resolver_handle = NULL;
- //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Done request %p, %u pending\n", ppc, count);
+ GNUNET_CONTAINER_DLL_remove (plugin->ppc_dll_head,
+ plugin->ppc_dll_tail,
+ ppc);
+ ppc->asc (ppc->asc_cls,
+ NULL,
+ GNUNET_OK);
GNUNET_free (ppc);
return;
}
- for (cur = ppc_dll_head; (NULL != cur); cur = cur->next)
- {
- if (cur == ppc)
- break;
- }
- if (NULL == cur)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid callback for PPC %p \n", ppc);
- return;
- }
-
if (GNUNET_YES == ppc->ipv6)
- GNUNET_asprintf (&ret, "%s.%u.[%s]:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
+ GNUNET_asprintf (&ret,
+ "%s.%u.[%s]:%d",
+ PLUGIN_NAME,
+ ppc->options,
+ hostname,
+ ppc->port);
else
- GNUNET_asprintf (&ret, "%s.%u.%s:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
- ppc->asc (ppc->asc_cls, ret);
+ GNUNET_asprintf (&ret,
+ "%s.%u.%s:%d",
+ PLUGIN_NAME,
+ ppc->options,
+ hostname,
+ ppc->port);
+ ppc->asc (ppc->asc_cls,
+ ret,
+ GNUNET_OK);
GNUNET_free (ret);
}
/**
- * Convert the transports address to a nice, human-readable
- * format.
+ * Convert the transports address to a nice, human-readable format.
*
- * @param cls closure
+ * @param cls closure with the `struct Plugin`
* @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
+ * @param addrlen length of the @a addr
* @param numeric should (IP) addresses be displayed in numeric form?
* @param timeout after how long should we give up?
* @param asc function to call on each string
- * @param asc_cls closure for asc
+ * @param asc_cls closure for @a asc
*/
static void
-tcp_plugin_address_pretty_printer (void *cls, const char *type,
- const void *addr, size_t addrlen,
+tcp_plugin_address_pretty_printer (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)
{
+ struct Plugin *plugin = cls;
struct PrettyPrinterContext *ppc;
const void *sb;
size_t sbs;
uint16_t port;
uint32_t options;
- if (addrlen == sizeof (struct IPv6TcpAddress))
+ if (sizeof(struct IPv6TcpAddress) == addrlen)
{
t6 = addr;
- memset (&a6, 0, sizeof (a6));
+ memset (&a6, 0, sizeof(a6));
a6.sin6_family = AF_INET6;
a6.sin6_port = t6->t6_port;
- memcpy (&a6.sin6_addr, &t6->ipv6_addr, sizeof (struct in6_addr));
+ GNUNET_memcpy (&a6.sin6_addr, &t6->ipv6_addr, sizeof(struct in6_addr));
port = ntohs (t6->t6_port);
options = ntohl (t6->options);
sb = &a6;
- sbs = sizeof (a6);
+ sbs = sizeof(a6);
}
- else if (addrlen == sizeof (struct IPv4TcpAddress))
+ else if (sizeof(struct IPv4TcpAddress) == addrlen)
{
t4 = addr;
- memset (&a4, 0, sizeof (a4));
+ memset (&a4, 0, sizeof(a4));
a4.sin_family = AF_INET;
a4.sin_port = t4->t4_port;
a4.sin_addr.s_addr = t4->ipv4_addr;
port = ntohs (t4->t4_port);
options = ntohl (t4->options);
sb = &a4;
- sbs = sizeof (a4);
- }
- else if (0 == addrlen)
- {
- asc (asc_cls, TRANSPORT_SESSION_INBOUND_STRING);
- asc (asc_cls, NULL);
- return;
+ sbs = sizeof(a4);
}
else
{
/* invalid address */
- GNUNET_break_op (0);
- asc (asc_cls, NULL);
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Unexpected address length: %u bytes\n"),
+ (unsigned int) addrlen);
+ asc (asc_cls, NULL, GNUNET_SYSERR);
+ asc (asc_cls, NULL, GNUNET_OK);
return;
}
- ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
- if (addrlen == sizeof (struct IPv6TcpAddress))
+ ppc = GNUNET_new (struct PrettyPrinterContext);
+ ppc->plugin = plugin;
+ if (addrlen == sizeof(struct IPv6TcpAddress))
ppc->ipv6 = GNUNET_YES;
else
ppc->ipv6 = GNUNET_NO;
ppc->asc_cls = asc_cls;
ppc->port = port;
ppc->options = options;
- ppc->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(timeout, 2),
- &ppc_cancel_task, ppc);
- ppc->resolver_handle = GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric,
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting DNS reverse lookup\n");
+ ppc->resolver_handle = GNUNET_RESOLVER_hostname_get (sb,
+ sbs,
+ ! numeric,
timeout,
- &append_port, ppc);
- if (NULL != ppc->resolver_handle)
- {
- //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Adding request %p\n", ppc);
- GNUNET_CONTAINER_DLL_insert (ppc_dll_head, ppc_dll_tail, ppc);
- }
- else
+ &append_port,
+ ppc);
+ if (NULL == ppc->resolver_handle)
{
GNUNET_break (0);
GNUNET_free (ppc);
+ return;
}
-}
-
-
-/**
- * Check if the given port is plausible (must be either our listen
- * port or our advertised port), or any port if we are behind NAT
- * and do not have a port open. If it is neither, we return
- * #GNUNET_SYSERR.
- *
- * @param plugin global variables
- * @param in_port port number to check
- * @return #GNUNET_OK if port is either open_port or adv_port
- */
-static int
-check_port (struct Plugin *plugin, uint16_t in_port)
-{
- if ((in_port == plugin->adv_port) || (in_port == plugin->open_port))
- return GNUNET_OK;
- return GNUNET_SYSERR;
+ GNUNET_CONTAINER_DLL_insert (plugin->ppc_dll_head,
+ plugin->ppc_dll_tail,
+ ppc);
}
* traffic to a 3rd party that might try to man-in-the-middle our
* traffic.
*
- * @param cls closure, our 'struct Plugin*'
+ * @param cls closure, our `struct Plugin *`
* @param addr pointer to the address
- * @param addrlen length of addr
+ * @param addrlen length of @a addr
* @return #GNUNET_OK if this is a plausible address for this peer
* and transport, #GNUNET_SYSERR if not
*/
static int
-tcp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
+tcp_plugin_check_address (void *cls,
+ const void *addr,
+ size_t addrlen)
{
struct Plugin *plugin = cls;
- struct IPv4TcpAddress *v4;
- struct IPv6TcpAddress *v6;
+ const struct IPv4TcpAddress *v4;
+ const struct IPv6TcpAddress *v6;
- if ((addrlen != sizeof (struct IPv4TcpAddress)) &&
- (addrlen != sizeof (struct IPv6TcpAddress)))
+ if ( (addrlen != sizeof(struct IPv4TcpAddress)) &&
+ (addrlen != sizeof(struct IPv6TcpAddress)) )
{
-
-
- return GNUNET_SYSERR;
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
}
- if (addrlen == sizeof (struct IPv4TcpAddress))
+ if (addrlen == sizeof(struct IPv4TcpAddress))
{
- v4 = (struct IPv4TcpAddress *) addr;
- if (0 != memcmp (&v4->options, &myoptions, sizeof (myoptions)))
+ struct sockaddr_in s4;
+
+ v4 = (const struct IPv4TcpAddress *) addr;
+ if (0 != memcmp (&v4->options,
+ &plugin->myoptions,
+ sizeof(uint32_t)))
{
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK != check_port (plugin, ntohs (v4->t4_port)))
+ GNUNET_break (0);
return GNUNET_SYSERR;
+ }
+ memset (&s4, 0, sizeof (s4));
+ s4.sin_family = AF_INET;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ s4.sin_len = sizeof (s4);
+#endif
+ s4.sin_port = v4->t4_port;
+ s4.sin_addr.s_addr = v4->ipv4_addr;
+
if (GNUNET_OK !=
- GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
- sizeof (struct in_addr)))
+ GNUNET_NAT_test_address (plugin->nat,
+ &s4,
+ sizeof (struct sockaddr_in)))
return GNUNET_SYSERR;
}
else
{
- v6 = (struct IPv6TcpAddress *) addr;
+ struct sockaddr_in6 s6;
+
+ v6 = (const struct IPv6TcpAddress *) addr;
if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
- if (0 != memcmp (&v6->options, &myoptions, sizeof (myoptions)))
+ if (0 != memcmp (&v6->options,
+ &plugin->myoptions,
+ sizeof (uint32_t)))
{
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK != check_port (plugin, ntohs (v6->t6_port)))
+ GNUNET_break (0);
return GNUNET_SYSERR;
+ }
+ memset (&s6, 0, sizeof (s6));
+ s6.sin6_family = AF_INET6;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ s6.sin6_len = sizeof (s6);
+#endif
+ s6.sin6_port = v6->t6_port;
+ s6.sin6_addr = v6->ipv6_addr;
+
if (GNUNET_OK !=
- GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
- sizeof (struct in6_addr)))
+ GNUNET_NAT_test_address (plugin->nat,
+ &s6,
+ sizeof(struct sockaddr_in6)))
return GNUNET_SYSERR;
}
return GNUNET_OK;
const struct GNUNET_MessageHeader *message)
{
struct Plugin *plugin = cls;
- struct Session *session;
+ struct GNUNET_ATS_Session *session;
const struct TCP_NAT_ProbeMessage *tcp_nat_probe;
size_t alen;
void *vaddr;
* as the default for that peer. Do so and then send a WELCOME message
* so we can really be connected!
*/
- if (ntohs (message->size) != sizeof (struct TCP_NAT_ProbeMessage))
+ if (ntohs (message->size) != sizeof(struct TCP_NAT_ProbeMessage))
{
- GNUNET_break_op (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ GNUNET_break_op(0);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
return;
}
tcp_nat_probe = (const struct TCP_NAT_ProbeMessage *) message;
- if (0 ==
- memcmp (&tcp_nat_probe->clientIdentity, plugin->env->my_identity,
- sizeof (struct GNUNET_PeerIdentity)))
+ if (0 == memcmp (&tcp_nat_probe->clientIdentity, plugin->env->my_identity,
+ sizeof(struct GNUNET_PeerIdentity)))
{
/* refuse connections from ourselves */
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
return;
}
- session =
- GNUNET_CONTAINER_multipeermap_get (plugin->nat_wait_conns,
- &tcp_nat_probe->clientIdentity);
- if (session == NULL)
+ session = GNUNET_CONTAINER_multipeermap_get (plugin->nat_wait_conns,
+ &tcp_nat_probe->clientIdentity);
+ if (NULL == session)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Did NOT find session for NAT probe!\n");
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ "Did NOT find session for NAT probe!\n");
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_OK);
return;
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Found session for NAT probe!\n");
- if (session->nat_connection_timeout != GNUNET_SCHEDULER_NO_TASK)
+ if (NULL != session->nat_connection_timeout)
{
GNUNET_SCHEDULER_cancel (session->nat_connection_timeout);
- session->nat_connection_timeout = GNUNET_SCHEDULER_NO_TASK;
+ session->nat_connection_timeout = NULL;
}
- if (GNUNET_OK != GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
+ if (GNUNET_OK !=
+ GNUNET_SERVER_client_get_address (client,
+ &vaddr,
+ &alen))
{
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- tcp_disconnect_session (plugin, session);
+ GNUNET_break(0);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
+ tcp_plugin_disconnect_session (plugin,
+ session);
return;
}
- GNUNET_assert (GNUNET_CONTAINER_multipeermap_remove
- (plugin->nat_wait_conns,
- &tcp_nat_probe->clientIdentity,
- session) == GNUNET_YES);
- GNUNET_SERVER_client_set_user_context (client, session);
- GNUNET_CONTAINER_multipeermap_put (plugin->sessionmap,
- &session->target, session,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (plugin->nat_wait_conns,
+ &tcp_nat_probe->clientIdentity,
+ session));
+ GNUNET_SERVER_client_set_user_context (client,
+ session);
+ (void) GNUNET_CONTAINER_multipeermap_put (plugin->sessionmap,
+ &session->target,
+ session,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
session->last_activity = GNUNET_TIME_absolute_get ();
- session->inbound = GNUNET_NO;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Found address `%s' for incoming connection\n",
GNUNET_a2s (vaddr, alen));
case AF_INET:
s4 = vaddr;
t4 = GNUNET_new (struct IPv4TcpAddress);
- t4->options = 0;
+ t4->options = htonl (TCP_OPTIONS_NONE);
t4->t4_port = s4->sin_port;
t4->ipv4_addr = s4->sin_addr.s_addr;
- session->addr = t4;
- session->addrlen = sizeof (struct IPv4TcpAddress);
+ session->address = GNUNET_HELLO_address_allocate (&tcp_nat_probe->clientIdentity,
+ PLUGIN_NAME,
+ &t4,
+ sizeof(struct IPv4TcpAddress),
+ GNUNET_HELLO_ADDRESS_INFO_NONE);
break;
case AF_INET6:
s6 = vaddr;
t6 = GNUNET_new (struct IPv6TcpAddress);
- t6->options = 0;
+ t6->options = htonl (TCP_OPTIONS_NONE);
t6->t6_port = s6->sin6_port;
- memcpy (&t6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr));
- session->addr = t6;
- session->addrlen = sizeof (struct IPv6TcpAddress);
+ GNUNET_memcpy (&t6->ipv6_addr, &s6->sin6_addr, sizeof(struct in6_addr));
+ session->address = GNUNET_HELLO_address_allocate (&tcp_nat_probe->clientIdentity,
+ PLUGIN_NAME,
+ &t6,
+ sizeof(struct IPv6TcpAddress),
+ GNUNET_HELLO_ADDRESS_INFO_NONE);
break;
default:
- GNUNET_break_op (0);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Bad address for incoming connection!\n");
- GNUNET_free (vaddr);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- tcp_disconnect_session (plugin, session);
+ GNUNET_break_op(0);
+ LOG(GNUNET_ERROR_TYPE_DEBUG,
+ "Bad address for incoming connection!\n");
+ GNUNET_free(vaddr);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
+ tcp_plugin_disconnect_session (plugin,
+ session);
return;
}
GNUNET_free (vaddr);
GNUNET_break (NULL == session->client);
- GNUNET_SERVER_client_keep (client);
session->client = client;
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# TCP sessions active"), 1,
- GNUNET_NO);
+ gettext_noop ("# TCP sessions active"),
+ 1,
+ GNUNET_NO);
process_pending_messages (session);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_OK);
}
* @param message the actual message
*/
static void
-handle_tcp_welcome (void *cls, struct GNUNET_SERVER_Client *client,
+handle_tcp_welcome (void *cls,
+ struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
struct Plugin *plugin = cls;
const struct WelcomeMessage *wm = (const struct WelcomeMessage *) message;
- struct Session *session;
+ struct GNUNET_HELLO_Address *address;
+ struct GNUNET_ATS_Session *session;
size_t alen;
void *vaddr;
- struct IPv4TcpAddress *t4;
- struct IPv6TcpAddress *t6;
+ struct IPv4TcpAddress t4;
+ struct IPv6TcpAddress t6;
const struct sockaddr_in *s4;
const struct sockaddr_in6 *s6;
- struct GNUNET_ATS_Information ats;
- if (0 ==
- memcmp (&wm->clientIdentity, plugin->env->my_identity,
- sizeof (struct GNUNET_PeerIdentity)))
+ if (0 == memcmp (&wm->clientIdentity,
+ plugin->env->my_identity,
+ sizeof(struct GNUNET_PeerIdentity)))
{
/* refuse connections from ourselves */
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- if (GNUNET_OK == GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
+ if (GNUNET_OK ==
+ GNUNET_SERVER_client_get_address (client,
+ &vaddr,
+ &alen))
{
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Received %s message from my own identity `%4s' on address `%s'\n",
- "WELCOME", GNUNET_i2s (&wm->clientIdentity), GNUNET_a2s (vaddr, alen));
- GNUNET_free (vaddr);
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ "Received WELCOME message from my own identity `%s' on address `%s'\n",
+ GNUNET_i2s (&wm->clientIdentity),
+ GNUNET_a2s (vaddr, alen));
+ GNUNET_free (vaddr);
}
- GNUNET_break_op (0);
return;
}
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received %s message from `%4s' %p\n", "WELCOME",
- GNUNET_i2s (&wm->clientIdentity), client);
+
+ if (GNUNET_OK ==
+ GNUNET_SERVER_client_get_address (client,
+ &vaddr,
+ &alen))
+ {
+ LOG(GNUNET_ERROR_TYPE_DEBUG,
+ "Received WELCOME message from `%s' on address `%s'\n",
+ GNUNET_i2s (&wm->clientIdentity),
+ GNUNET_a2s (vaddr, alen));
+ GNUNET_free (vaddr);
+ }
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# TCP WELCOME messages received"), 1,
+ gettext_noop ("# TCP WELCOME messages received"),
+ 1,
GNUNET_NO);
- session = lookup_session_by_client (plugin, client);
- if (session != NULL)
+ session = lookup_session_by_client (plugin,
+ client);
+ if (NULL != session)
{
- if (GNUNET_OK == GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
+ if (GNUNET_OK ==
+ GNUNET_SERVER_client_get_address (client,
+ &vaddr,
+ &alen))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Found existing session %p for peer `%s'\n",
- session,
- GNUNET_a2s (vaddr, alen));
+ "Found existing session %p for peer `%s'\n",
+ session,
+ GNUNET_a2s (vaddr, alen));
GNUNET_free (vaddr);
}
}
else
{
- GNUNET_SERVER_client_keep (client);
- if (plugin->service != NULL) /* Otherwise value is incremented in tcp_access_check */
- plugin->cur_connections++;
- if (plugin->cur_connections == plugin->max_connections)
- GNUNET_SERVER_suspend (plugin->server); /* Maximum number of connections rechead */
-
- session = create_session (plugin, &wm->clientIdentity, client, GNUNET_NO);
- session->inbound = GNUNET_YES;
- if (GNUNET_OK == GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
+ if (GNUNET_OK ==
+ GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
{
- if (alen == sizeof (struct sockaddr_in))
+ if (alen == sizeof(struct sockaddr_in))
{
s4 = vaddr;
- t4 = GNUNET_new (struct IPv4TcpAddress);
- t4->options = htonl (0);
- t4->t4_port = s4->sin_port;
- t4->ipv4_addr = s4->sin_addr.s_addr;
- session->addr = t4;
- session->addrlen = sizeof (struct IPv4TcpAddress);
+ memset (&t4, '\0', sizeof (t4));
+ t4.options = htonl (TCP_OPTIONS_NONE);
+ t4.t4_port = s4->sin_port;
+ t4.ipv4_addr = s4->sin_addr.s_addr;
+ address = GNUNET_HELLO_address_allocate (&wm->clientIdentity,
+ PLUGIN_NAME,
+ &t4,
+ sizeof(t4),
+ GNUNET_HELLO_ADDRESS_INFO_INBOUND);
}
- else if (alen == sizeof (struct sockaddr_in6))
+ else if (alen == sizeof(struct sockaddr_in6))
{
s6 = vaddr;
- t6 = GNUNET_new (struct IPv6TcpAddress);
- t6->options = htonl (0);
- t6->t6_port = s6->sin6_port;
- memcpy (&t6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr));
- session->addr = t6;
- session->addrlen = sizeof (struct IPv6TcpAddress);
+ memset (&t6, '\0', sizeof (t6));
+ t6.options = htonl (TCP_OPTIONS_NONE);
+ t6.t6_port = s6->sin6_port;
+ GNUNET_memcpy (&t6.ipv6_addr, &s6->sin6_addr, sizeof(struct in6_addr));
+ address = GNUNET_HELLO_address_allocate (&wm->clientIdentity,
+ PLUGIN_NAME,
+ &t6,
+ sizeof (t6),
+ GNUNET_HELLO_ADDRESS_INFO_INBOUND);
}
-
- ats = plugin->env->get_address_type (plugin->env->cls, vaddr ,alen);
- session->ats_address_network_type = (enum GNUNET_ATS_Network_Type) ntohl (ats.value);
+ else
+ {
+ GNUNET_break (0);
+ GNUNET_free_non_null (vaddr);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
+ return;
+ }
+ session = create_session (plugin,
+ address,
+ plugin->env->get_address_type (plugin->env->cls,
+ vaddr,
+ alen),
+ client,
+ GNUNET_NO);
+ GNUNET_break (GNUNET_ATS_NET_UNSPECIFIED != session->scope);
+ GNUNET_HELLO_address_free (address);
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Creating new session %p for peer `%s'\n",
+ "Creating new%s session %p for peer `%s' client %p\n",
+ GNUNET_HELLO_address_check_option (session->address,
+ GNUNET_HELLO_ADDRESS_INFO_INBOUND)
+ ? " inbound" : "",
session,
- GNUNET_a2s (vaddr, alen));
+ tcp_plugin_address_to_string (plugin,
+ session->address->address,
+ session->address->address_length),
+ client);
GNUNET_free (vaddr);
- GNUNET_SERVER_client_set_user_context (session->client, session);
- GNUNET_CONTAINER_multipeermap_put (plugin->sessionmap,
- &session->target,
- session,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ (void) GNUNET_CONTAINER_multipeermap_put (plugin->sessionmap,
+ &session->target,
+ session,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ /* Notify transport and ATS about new session */
+ plugin->env->session_start (plugin->env->cls,
+ session->address,
+ session,
+ session->scope);
}
else
{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Did not obtain TCP socket address for incoming connection\n");
- GNUNET_break (0);
+ LOG(GNUNET_ERROR_TYPE_DEBUG,
+ "Did not obtain TCP socket address for incoming connection\n");
+ GNUNET_break(0);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
+ return;
}
}
- if (session->expecting_welcome != GNUNET_YES)
+ if (GNUNET_YES != session->expecting_welcome)
{
GNUNET_break_op (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
return;
}
session->last_activity = GNUNET_TIME_absolute_get ();
session->expecting_welcome = GNUNET_NO;
- /* Notify transport and ATS about new session */
- if (GNUNET_YES == session->inbound)
- {
- plugin->env->session_start (NULL, &wm->clientIdentity, PLUGIN_NAME,
- (GNUNET_YES == session->inbound) ? NULL : session->addr,
- (GNUNET_YES == session->inbound) ? 0 : session->addrlen,
- session, &ats, 1);
- }
-
process_pending_messages (session);
-
GNUNET_SERVER_client_set_timeout (client,
GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
-}
-
-
-/**
- * Task to signal the server that we can continue
- * receiving from the TCP client now.
- *
- * @param cls the 'struct Session*'
- * @param tc task context (unused)
- */
-static void
-delayed_done (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct Session *session = cls;
-
- session->receive_delay_task = GNUNET_SCHEDULER_NO_TASK;
- reschedule_session_timeout (session);
-
- GNUNET_SERVER_receive_done (session->client, GNUNET_OK);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_OK);
}
* @param message the actual message
*/
static void
-handle_tcp_data (void *cls, struct GNUNET_SERVER_Client *client,
+handle_tcp_data (void *cls,
+ struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
struct Plugin *plugin = cls;
- struct Session *session;
+ struct GNUNET_ATS_Session *session;
struct GNUNET_TIME_Relative delay;
uint16_t type;
type = ntohs (message->type);
- if ((GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME == type) ||
- (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE == type))
+ if ( (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME == type) ||
+ (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE == type) )
{
/* We don't want to propagate WELCOME and NAT Probe messages up! */
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_OK);
return;
}
session = lookup_session_by_client (plugin, client);
void *vaddr;
size_t alen;
- GNUNET_SERVER_client_get_address (client, &vaddr, &alen);
+ GNUNET_SERVER_client_get_address (client,
+ &vaddr,
+ &alen);
LOG (GNUNET_ERROR_TYPE_ERROR,
- "Received unexpected %u bytes of type %u from `%s'\n",
- (unsigned int) ntohs (message->size),
- (unsigned int) ntohs (message->type),
- GNUNET_a2s(vaddr, alen));
- GNUNET_break_op (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- GNUNET_free_non_null(vaddr);
+ "Received unexpected %u bytes of type %u from `%s'\n",
+ (unsigned int) ntohs (message->size),
+ (unsigned int) ntohs (message->type),
+ GNUNET_a2s (vaddr,
+ alen));
+ GNUNET_break_op(0);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
+ GNUNET_free_non_null (vaddr);
return;
}
- else if (GNUNET_YES == session->expecting_welcome)
+ if (GNUNET_YES == session->expecting_welcome)
{
/* Session is expecting WELCOME message */
void *vaddr;
size_t alen;
- GNUNET_SERVER_client_get_address (client, &vaddr, &alen);
+ GNUNET_SERVER_client_get_address (client,
+ &vaddr,
+ &alen);
LOG (GNUNET_ERROR_TYPE_ERROR,
- "Received unexpected %u bytes of type %u from `%s'\n",
- (unsigned int) ntohs (message->size),
- (unsigned int) ntohs (message->type),
- GNUNET_a2s(vaddr, alen));
- GNUNET_break_op (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- GNUNET_free_non_null(vaddr);
+ "Received unexpected %u bytes of type %u from `%s'\n",
+ (unsigned int) ntohs (message->size),
+ (unsigned int) ntohs (message->type),
+ GNUNET_a2s (vaddr, alen));
+ GNUNET_break_op(0);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
+ GNUNET_free_non_null (vaddr);
return;
}
session->last_activity = GNUNET_TIME_absolute_get ();
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Passing %u bytes of type %u from `%4s' to transport service.\n",
- (unsigned int) ntohs (message->size),
- (unsigned int) ntohs (message->type),
- GNUNET_i2s (&session->target));
+ {
+ void *vaddr;
+ size_t alen;
+
+ GNUNET_SERVER_client_get_address (client,
+ &vaddr,
+ &alen);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Passing %u bytes of type %u from `%s' at %s to transport service.\n",
+ (unsigned int) ntohs (message->size),
+ (unsigned int) ntohs (message->type),
+ GNUNET_i2s (&session->target),
+ GNUNET_a2s (vaddr, alen));
+ GNUNET_free_non_null (vaddr);
+ }
GNUNET_STATISTICS_update (plugin->env->stats,
gettext_noop ("# bytes received via TCP"),
- ntohs (message->size), GNUNET_NO);
- struct GNUNET_ATS_Information distance;
-
- distance.type = htonl (GNUNET_ATS_NETWORK_TYPE);
- distance.value = htonl ((uint32_t) session->ats_address_network_type);
- GNUNET_break (session->ats_address_network_type != GNUNET_ATS_NET_UNSPECIFIED);
+ ntohs (message->size),
+ GNUNET_NO);
GNUNET_assert (GNUNET_CONTAINER_multipeermap_contains_value (plugin->sessionmap,
- &session->target,
- session));
-
+ &session->target,
+ session));
delay = plugin->env->receive (plugin->env->cls,
- &session->target,
- message,
+ session->address,
session,
- (GNUNET_YES == session->inbound) ? NULL : session->addr,
- (GNUNET_YES == session->inbound) ? 0 : session->addrlen);
- plugin->env->update_address_metrics (plugin->env->cls,
- &session->target,
- (GNUNET_YES == session->inbound) ? NULL : session->addr,
- (GNUNET_YES == session->inbound) ? 0 : session->addrlen,
- session, &distance, 1);
+ message);
reschedule_session_timeout (session);
if (0 == delay.rel_value_us)
{
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_OK);
}
else
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Throttling receiving from `%s' for %s\n",
- GNUNET_i2s (&session->target),
- GNUNET_STRINGS_relative_time_to_string (delay, GNUNET_YES));
+ "Throttling receiving from `%s' for %s\n",
+ GNUNET_i2s (&session->target),
+ GNUNET_STRINGS_relative_time_to_string (delay,
+ GNUNET_YES));
GNUNET_SERVER_disable_receive_done_warning (client);
- session->receive_delay_task =
- GNUNET_SCHEDULER_add_delayed (delay, &delayed_done, session);
+ GNUNET_assert (NULL == session->receive_delay_task);
+ session->receive_delay_task = GNUNET_SCHEDULER_add_delayed (delay,
+ &delayed_done,
+ session);
}
}
/**
- * Functions with this signature are called whenever a peer
- * is disconnected on the network level.
+ * Function called whenever a peer is connected on the "SERVER" level.
+ * Increments number of active connections and suspends server if we
+ * have reached the limit.
*
* @param cls closure
* @param client identification of the client
*/
static void
-disconnect_notify (void *cls, struct GNUNET_SERVER_Client *client)
+connect_notify (void *cls,
+ struct GNUNET_SERVER_Client *client)
{
struct Plugin *plugin = cls;
- struct Session *session;
- if (client == NULL)
+ if (NULL == client)
return;
- session = lookup_session_by_client (plugin, client);
- if (session == NULL)
- return; /* unknown, nothing to do */
+ plugin->cur_connections++;
+ GNUNET_STATISTICS_set (plugin->env->stats,
+ gettext_noop ("# TCP server connections active"),
+ plugin->cur_connections,
+ GNUNET_NO);
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ gettext_noop ("# TCP server connect events"),
+ 1,
+ GNUNET_NO);
+ if (plugin->cur_connections != plugin->max_connections)
+ return;
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("TCP connection limit reached, suspending server\n"));
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ gettext_noop ("# TCP service suspended"),
+ 1,
+ GNUNET_NO);
+ GNUNET_SERVER_suspend (plugin->server); /* Maximum number of connections rechead */
+}
+
+
+/**
+ * Function called whenever a peer is disconnected on the "SERVER"
+ * level. Cleans up the connection, decrements number of active
+ * connections and if applicable resumes listening.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ */
+static void
+disconnect_notify (void *cls,
+ struct GNUNET_SERVER_Client *client)
+{
+ struct Plugin *plugin = cls;
+ struct GNUNET_ATS_Session *session;
+
+ if (NULL == client)
+ return;
+ GNUNET_assert (plugin->cur_connections >= 1);
+ plugin->cur_connections--;
+ session = lookup_session_by_client (plugin,
+ client);
+ if (NULL == session)
+ return; /* unknown, nothing to do */
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Destroying session of `%4s' with %s due to network-level disconnect.\n",
+ "Destroying session of `%s' with %s due to network-level disconnect.\n",
GNUNET_i2s (&session->target),
- (session->addr !=
- NULL) ? tcp_address_to_string (session->plugin,
- session->addr,
- session->addrlen) :
- "*");
+ tcp_plugin_address_to_string (session->plugin,
+ session->address->address,
+ session->address->address_length));
if (plugin->cur_connections == plugin->max_connections)
+ {
+ GNUNET_STATISTICS_update (session->plugin->env->stats,
+ gettext_noop ("# TCP service resumed"),
+ 1,
+ GNUNET_NO);
GNUNET_SERVER_resume (plugin->server); /* Resume server */
-
- if (plugin->cur_connections < 1)
- GNUNET_break (0);
- else
- plugin->cur_connections--;
-
+ }
+ GNUNET_STATISTICS_set (plugin->env->stats,
+ gettext_noop ("# TCP server connections active"),
+ plugin->cur_connections,
+ GNUNET_NO);
GNUNET_STATISTICS_update (session->plugin->env->stats,
- gettext_noop
- ("# network-level TCP disconnect events"), 1,
+ gettext_noop ("# network-level TCP disconnect events"),
+ 1,
GNUNET_NO);
- tcp_disconnect_session (plugin, session);
+ tcp_plugin_disconnect_session (plugin,
+ session);
}
/**
* We can now send a probe message, copy into buffer to really send.
*
- * @param cls closure, a struct TCPProbeContext
+ * @param cls closure, a `struct TCPProbeContext`
* @param size max size to copy
* @param buf buffer to copy message to
- * @return number of bytes copied into buf
+ * @return number of bytes copied into @a buf
*/
static size_t
-notify_send_probe (void *cls, size_t size, void *buf)
+notify_send_probe (void *cls,
+ size_t size,
+ void *buf)
{
struct TCPProbeContext *tcp_probe_ctx = cls;
struct Plugin *plugin = tcp_probe_ctx->plugin;
size_t ret;
tcp_probe_ctx->transmit_handle = NULL;
- GNUNET_CONTAINER_DLL_remove (plugin->probe_head, plugin->probe_tail,
+ GNUNET_CONTAINER_DLL_remove (plugin->probe_head,
+ plugin->probe_tail,
tcp_probe_ctx);
- if (buf == NULL)
+ if (NULL == buf)
{
GNUNET_CONNECTION_destroy (tcp_probe_ctx->sock);
- GNUNET_free (tcp_probe_ctx);
+ GNUNET_free(tcp_probe_ctx);
return 0;
}
- GNUNET_assert (size >= sizeof (tcp_probe_ctx->message));
- memcpy (buf, &tcp_probe_ctx->message, sizeof (tcp_probe_ctx->message));
+ GNUNET_assert(size >= sizeof(tcp_probe_ctx->message));
+ GNUNET_memcpy (buf,
+ &tcp_probe_ctx->message,
+ sizeof(tcp_probe_ctx->message));
GNUNET_SERVER_connect_socket (tcp_probe_ctx->plugin->server,
tcp_probe_ctx->sock);
- ret = sizeof (tcp_probe_ctx->message);
+ ret = sizeof(tcp_probe_ctx->message);
GNUNET_free (tcp_probe_ctx);
return ret;
}
* @param addrlen number of bytes in @a addr
*/
static void
-try_connection_reversal (void *cls, const struct sockaddr *addr,
+try_connection_reversal (void *cls,
+ const struct sockaddr *addr,
socklen_t addrlen)
{
struct Plugin *plugin = cls;
* We have received an ICMP response, ostensibly from a peer
* that wants to connect to us! Send a message to establish a connection.
*/
- sock = GNUNET_CONNECTION_create_from_sockaddr (AF_INET, addr, addrlen);
- if (sock == NULL)
+ sock = GNUNET_CONNECTION_create_from_sockaddr (AF_INET,
+ addr,
+ addrlen);
+ if (NULL == sock)
{
/* failed for some odd reason (out of sockets?); ignore attempt */
return;
}
- /* FIXME: do we need to track these probe context objects so that
- * we can clean them up on plugin unload? */
- tcp_probe_ctx = GNUNET_malloc (sizeof (struct TCPProbeContext));
- tcp_probe_ctx->message.header.size =
- htons (sizeof (struct TCP_NAT_ProbeMessage));
- tcp_probe_ctx->message.header.type =
- htons (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE);
- memcpy (&tcp_probe_ctx->message.clientIdentity, plugin->env->my_identity,
- sizeof (struct GNUNET_PeerIdentity));
+ tcp_probe_ctx = GNUNET_new (struct TCPProbeContext);
+ tcp_probe_ctx->message.header.size
+ = htons (sizeof (struct TCP_NAT_ProbeMessage));
+ tcp_probe_ctx->message.header.type
+ = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE);
+ tcp_probe_ctx->message.clientIdentity
+ = *plugin->env->my_identity;
tcp_probe_ctx->plugin = plugin;
tcp_probe_ctx->sock = sock;
- GNUNET_CONTAINER_DLL_insert (plugin->probe_head, plugin->probe_tail,
+ GNUNET_CONTAINER_DLL_insert (plugin->probe_head,
+ plugin->probe_tail,
tcp_probe_ctx);
- tcp_probe_ctx->transmit_handle =
- GNUNET_CONNECTION_notify_transmit_ready (sock,
- ntohs (tcp_probe_ctx->
- message.header.size),
+ tcp_probe_ctx->transmit_handle
+ = GNUNET_CONNECTION_notify_transmit_ready (sock,
+ ntohs (tcp_probe_ctx->message.header.size),
GNUNET_TIME_UNIT_FOREVER_REL,
¬ify_send_probe,
tcp_probe_ctx);
-
}
/**
* Function obtain the network type for a session
*
- * @param cls closure ('struct Plugin*')
+ * @param cls closure (`struct Plugin *`)
* @param session the session
* @return the network type in HBO or #GNUNET_SYSERR
*/
static enum GNUNET_ATS_Network_Type
-tcp_get_network (void *cls,
- struct Session *session)
+tcp_plugin_get_network (void *cls,
+ struct GNUNET_ATS_Session *session)
+{
+ return session->scope;
+}
+
+
+/**
+ * Function obtain the network type for an address.
+ *
+ * @param cls closure (`struct Plugin *`)
+ * @param address the address
+ * @return the network type
+ */
+static enum GNUNET_ATS_Network_Type
+tcp_plugin_get_network_for_address (void *cls,
+ const struct GNUNET_HELLO_Address *address)
+{
+ struct Plugin *plugin = cls;
+ size_t addrlen;
+ struct sockaddr_in a4;
+ struct sockaddr_in6 a6;
+ const struct IPv4TcpAddress *t4;
+ const struct IPv6TcpAddress *t6;
+ const void *sb;
+ size_t sbs;
+
+ addrlen = address->address_length;
+ if (addrlen == sizeof(struct IPv6TcpAddress))
+ {
+ GNUNET_assert (NULL != address->address); /* make static analysis happy */
+ t6 = address->address;
+ memset (&a6, 0, sizeof(a6));
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ a6.sin6_len = sizeof (a6);
+#endif
+ a6.sin6_family = AF_INET6;
+ a6.sin6_port = t6->t6_port;
+ GNUNET_memcpy (&a6.sin6_addr, &t6->ipv6_addr, sizeof(struct in6_addr));
+ sb = &a6;
+ sbs = sizeof(a6);
+ }
+ else if (addrlen == sizeof(struct IPv4TcpAddress))
+ {
+ GNUNET_assert (NULL != address->address); /* make static analysis happy */
+ t4 = address->address;
+ memset (&a4, 0, sizeof(a4));
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ a4.sin_len = sizeof (a4);
+#endif
+ a4.sin_family = AF_INET;
+ a4.sin_port = t4->t4_port;
+ a4.sin_addr.s_addr = t4->ipv4_addr;
+ sb = &a4;
+ sbs = sizeof(a4);
+ }
+ else
+ {
+ GNUNET_break (0);
+ return GNUNET_ATS_NET_UNSPECIFIED;
+ }
+ return plugin->env->get_address_type (plugin->env->cls,
+ sb,
+ sbs);
+}
+
+
+/**
+ * Return information about the given session to the
+ * monitor callback.
+ *
+ * @param cls the `struct Plugin` with the monitor callback (`sic`)
+ * @param peer peer we send information about
+ * @param value our `struct GNUNET_ATS_Session` to send information about
+ * @return #GNUNET_OK (continue to iterate)
+ */
+static int
+send_session_info_iter (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ void *value)
+{
+ struct Plugin *plugin = cls;
+ struct GNUNET_ATS_Session *session = value;
+
+ notify_session_monitor (plugin,
+ session,
+ GNUNET_TRANSPORT_SS_INIT);
+ /* FIXME: cannot tell if this is up or not from current
+ session state... */
+ notify_session_monitor (plugin,
+ session,
+ GNUNET_TRANSPORT_SS_UP);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Begin monitoring sessions of a plugin. There can only
+ * be one active monitor per plugin (i.e. if there are
+ * multiple monitors, the transport service needs to
+ * multiplex the generated events over all of them).
+ *
+ * @param cls closure of the plugin
+ * @param sic callback to invoke, NULL to disable monitor;
+ * plugin will being by iterating over all active
+ * sessions immediately and then enter monitor mode
+ * @param sic_cls closure for @a sic
+ */
+static void
+tcp_plugin_setup_monitor (void *cls,
+ GNUNET_TRANSPORT_SessionInfoCallback sic,
+ void *sic_cls)
{
- GNUNET_assert (NULL != session);
- return session->ats_address_network_type;
+ struct Plugin *plugin = cls;
+
+ plugin->sic = sic;
+ plugin->sic_cls = sic_cls;
+ if (NULL != sic)
+ {
+ GNUNET_CONTAINER_multipeermap_iterate (plugin->sessionmap,
+ &send_session_info_iter,
+ plugin);
+ /* signal end of first iteration */
+ sic (sic_cls, NULL, NULL);
+ }
}
/**
* Entry point for the plugin.
*
- * @param cls closure, the 'struct GNUNET_TRANSPORT_PluginEnvironment*'
- * @return the 'struct GNUNET_TRANSPORT_PluginFunctions*' or NULL on error
+ * @param cls closure, the `struct GNUNET_TRANSPORT_PluginEnvironment *`
+ * @return the `struct GNUNET_TRANSPORT_PluginFunctions *` or NULL on error
*/
void *
libgnunet_plugin_transport_tcp_init (void *cls)
{
static const struct GNUNET_SERVER_MessageHandler my_handlers[] = {
- {&handle_tcp_welcome, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME,
- sizeof (struct WelcomeMessage)},
- {&handle_tcp_nat_probe, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE,
- sizeof (struct TCP_NAT_ProbeMessage)},
- {&handle_tcp_data, NULL, GNUNET_MESSAGE_TYPE_ALL, 0},
- {NULL, NULL, 0, 0}
+ { &handle_tcp_welcome, NULL,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME,
+ sizeof(struct WelcomeMessage) },
+ { &handle_tcp_nat_probe, NULL,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE,
+ sizeof(struct TCP_NAT_ProbeMessage) },
+ { &handle_tcp_data, NULL,
+ GNUNET_MESSAGE_TYPE_ALL, 0 },
+ { NULL, NULL, 0, 0 }
};
struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
struct GNUNET_TRANSPORT_PluginFunctions *api;
struct Plugin *plugin;
- struct GNUNET_SERVICE_Context *service;
+ struct LEGACY_SERVICE_Context *service;
unsigned long long aport;
unsigned long long bport;
unsigned long long max_connections;
unsigned int i;
struct GNUNET_TIME_Relative idle_timeout;
+#ifdef TCP_STEALTH
+ struct GNUNET_NETWORK_Handle *const*lsocks;
+#endif
int ret;
int ret_s;
struct sockaddr **addrs;
socklen_t *addrlens;
-
if (NULL == env->receive)
{
/* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
- initialze the plugin or the API */
+ initialze the plugin or the API */
api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
api->cls = NULL;
api->address_pretty_printer = &tcp_plugin_address_pretty_printer;
- api->address_to_string = &tcp_address_to_string;
- api->string_to_address = &tcp_string_to_address;
+ api->address_to_string = &tcp_plugin_address_to_string;
+ api->string_to_address = &tcp_plugin_string_to_address;
return api;
}
GNUNET_assert (NULL != env->cfg);
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-tcp",
+ GNUNET_CONFIGURATION_get_value_number (env->cfg,
+ "transport-tcp",
"MAX_CONNECTIONS",
&max_connections))
max_connections = 128;
aport = 0;
if ((GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-tcp", "PORT",
- &bport)) || (bport > 65535) ||
+ GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-tcp",
+ "PORT", &bport)) ||
+ (bport > 65535) ||
((GNUNET_OK ==
GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-tcp",
"ADVERTISED-PORT", &aport)) &&
- (aport > 65535)))
+ (aport > 65535) ))
{
- LOG (GNUNET_ERROR_TYPE_ERROR,
- _("Require valid port number for service `%s' in configuration!\n"),
- "transport-tcp");
- return NULL;
+ LOG(GNUNET_ERROR_TYPE_ERROR,
+ _("Require valid port number for service `%s' in configuration!\n"),
+ "transport-tcp");
+ return NULL ;
}
- if (aport == 0)
+ if (0 == aport)
aport = bport;
- if (bport == 0)
+ if (0 == bport)
aport = 0;
- if (bport != 0)
+ if (0 != bport)
{
- service = GNUNET_SERVICE_start ("transport-tcp", env->cfg, GNUNET_SERVICE_OPTION_NONE);
- if (service == NULL)
+ service = LEGACY_SERVICE_start ("transport-tcp",
+ env->cfg,
+ LEGACY_SERVICE_OPTION_NONE);
+ if (NULL == service)
{
LOG (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to start service.\n"));
+ _("Failed to start service.\n"));
return NULL;
}
}
else
service = NULL;
- /* Initialize my flags */
- myoptions = 0;
-
+ api = NULL;
plugin = GNUNET_new (struct Plugin);
- plugin->sessionmap = GNUNET_CONTAINER_multipeermap_create (max_connections, GNUNET_YES);
+ plugin->sessionmap = GNUNET_CONTAINER_multipeermap_create (max_connections,
+ GNUNET_YES);
plugin->max_connections = max_connections;
- plugin->cur_connections = 0;
plugin->open_port = bport;
plugin->adv_port = aport;
plugin->env = env;
- plugin->lsock = NULL;
- if ((service != NULL) &&
- (GNUNET_SYSERR !=
- (ret_s =
- GNUNET_SERVICE_get_server_addresses ("transport-tcp", env->cfg, &addrs,
- &addrlens))))
+ plugin->my_welcome.header.size = htons (sizeof(struct WelcomeMessage));
+ plugin->my_welcome.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME);
+ plugin->my_welcome.clientIdentity = *plugin->env->my_identity;
+
+ if ( (NULL != service) &&
+ (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
+ "transport-tcp",
+ "TCP_STEALTH")) )
+ {
+#ifdef TCP_STEALTH
+ plugin->myoptions |= TCP_OPTIONS_TCP_STEALTH;
+ lsocks = LEGACY_SERVICE_get_listen_sockets (service);
+ if (NULL != lsocks)
+ {
+ uint32_t len = sizeof (struct WelcomeMessage);
+
+ for (i=0;NULL!=lsocks[i];i++)
+ {
+ if ( (GNUNET_OK !=
+ GNUNET_NETWORK_socket_setsockopt (lsocks[i],
+ IPPROTO_TCP,
+ TCP_STEALTH,
+ env->my_identity,
+ sizeof (struct GNUNET_PeerIdentity))) ||
+ (GNUNET_OK !=
+ GNUNET_NETWORK_socket_setsockopt (lsocks[i],
+ IPPROTO_TCP,
+ TCP_STEALTH_INTEGRITY_LEN,
+ &len,
+ sizeof (len))) )
+ {
+ /* TCP STEALTH not supported by kernel */
+ GNUNET_assert (0 == i);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("TCP_STEALTH not supported on this platform.\n"));
+ goto die;
+ }
+ }
+ }
+#else
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("TCP_STEALTH not supported on this platform.\n"));
+ goto die;
+#endif
+ }
+
+ if ( (NULL != service) &&
+ (GNUNET_SYSERR !=
+ (ret_s =
+ get_server_addresses ("transport-tcp",
+ env->cfg,
+ &addrs,
+ &addrlens))))
{
for (ret = ret_s-1; ret >= 0; ret--)
LOG (GNUNET_ERROR_TYPE_INFO,
- "Binding to address `%s'\n",
- GNUNET_a2s (addrs[ret], addrlens[ret]));
- plugin->nat =
- GNUNET_NAT_register (env->cfg, GNUNET_YES, aport, (unsigned int) ret_s,
- (const struct sockaddr **) addrs, addrlens,
+ "Binding to address `%s'\n",
+ GNUNET_a2s (addrs[ret], addrlens[ret]));
+ plugin->nat
+ = GNUNET_NAT_register (env->cfg,
+ "transport-tcp",
+ IPPROTO_TCP,
+ (unsigned int) ret_s,
+ (const struct sockaddr **) addrs,
+ addrlens,
&tcp_nat_port_map_callback,
- &try_connection_reversal, plugin);
+ &try_connection_reversal,
+ plugin);
for (ret = ret_s -1; ret >= 0; ret--)
- {
- GNUNET_assert (addrs[ret] != NULL);
GNUNET_free (addrs[ret]);
- }
GNUNET_free_non_null (addrs);
GNUNET_free_non_null (addrlens);
}
else
{
plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
- GNUNET_YES, 0, 0, NULL, NULL, NULL,
- &try_connection_reversal, plugin);
+ "transport-tcp",
+ IPPROTO_TCP,
+ 0,
+ NULL,
+ NULL,
+ NULL,
+ &try_connection_reversal,
+ plugin);
}
api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
api->cls = plugin;
api->send = &tcp_plugin_send;
api->get_session = &tcp_plugin_get_session;
-
- api->disconnect_session = &tcp_disconnect_session;
+ api->disconnect_session = &tcp_plugin_disconnect_session;
+ api->query_keepalive_factor = &tcp_plugin_query_keepalive_factor;
api->disconnect_peer = &tcp_plugin_disconnect;
api->address_pretty_printer = &tcp_plugin_address_pretty_printer;
api->check_address = &tcp_plugin_check_address;
- api->address_to_string = &tcp_address_to_string;
- api->string_to_address = &tcp_string_to_address;
- api->get_network = &tcp_get_network;
+ api->address_to_string = &tcp_plugin_address_to_string;
+ api->string_to_address = &tcp_plugin_string_to_address;
+ api->get_network = &tcp_plugin_get_network;
+ api->get_network_for_address = &tcp_plugin_get_network_for_address;
+ api->update_session_timeout = &tcp_plugin_update_session_timeout;
+ api->update_inbound_delay = &tcp_plugin_update_inbound_delay;
+ api->setup_monitor = &tcp_plugin_setup_monitor;
plugin->service = service;
if (NULL != service)
{
- plugin->server = GNUNET_SERVICE_get_server (service);
+ plugin->server = LEGACY_SERVICE_get_server (service);
}
else
{
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_time (env->cfg, "transport-tcp",
- "TIMEOUT", &idle_timeout))
+ GNUNET_CONFIGURATION_get_value_time (env->cfg,
+ "transport-tcp",
+ "TIMEOUT",
+ &idle_timeout))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
- "transport-tcp", "TIMEOUT");
- if (plugin->nat != NULL)
- GNUNET_NAT_unregister (plugin->nat);
- GNUNET_free (plugin);
- GNUNET_free (api);
- return NULL;
+ "transport-tcp",
+ "TIMEOUT");
+ goto die;
}
- plugin->server =
- GNUNET_SERVER_create_with_sockets (&plugin_tcp_access_check, plugin,
- NULL, idle_timeout, GNUNET_YES);
+ plugin->server
+ = GNUNET_SERVER_create_with_sockets (NULL,
+ plugin,
+ NULL,
+ idle_timeout,
+ GNUNET_YES);
}
plugin->handlers = GNUNET_malloc (sizeof (my_handlers));
- memcpy (plugin->handlers, my_handlers, sizeof (my_handlers));
- for (i = 0;
- i < sizeof (my_handlers) / sizeof (struct GNUNET_SERVER_MessageHandler);
- i++)
+ GNUNET_memcpy (plugin->handlers,
+ my_handlers,
+ sizeof(my_handlers));
+ for (i = 0;i < sizeof(my_handlers) / sizeof(struct GNUNET_SERVER_MessageHandler);i++)
plugin->handlers[i].callback_cls = plugin;
- GNUNET_SERVER_add_handlers (plugin->server, plugin->handlers);
- GNUNET_SERVER_disconnect_notify (plugin->server, &disconnect_notify, plugin);
- plugin->nat_wait_conns = GNUNET_CONTAINER_multipeermap_create (16, GNUNET_YES);
- if (bport != 0)
+ GNUNET_SERVER_add_handlers (plugin->server,
+ plugin->handlers);
+ GNUNET_SERVER_connect_notify (plugin->server,
+ &connect_notify,
+ plugin);
+ GNUNET_SERVER_disconnect_notify (plugin->server,
+ &disconnect_notify,
+ plugin);
+ plugin->nat_wait_conns = GNUNET_CONTAINER_multipeermap_create (16,
+ GNUNET_YES);
+ if (0 != bport)
LOG (GNUNET_ERROR_TYPE_INFO,
- _("TCP transport listening on port %llu\n"), bport);
+ _("TCP transport listening on port %llu\n"),
+ bport);
else
LOG (GNUNET_ERROR_TYPE_INFO,
- _("TCP transport not listening on any port (client only)\n"));
- if (aport != bport)
+ _("TCP transport not listening on any port (client only)\n"));
+ if ( (aport != bport) &&
+ (0 != bport) )
LOG (GNUNET_ERROR_TYPE_INFO,
_("TCP transport advertises itself as being on port %llu\n"),
aport);
/* Initially set connections to 0 */
- GNUNET_assert (NULL != plugin->env->stats);
GNUNET_STATISTICS_set (plugin->env->stats,
- gettext_noop ("# TCP sessions active"), 0,
+ gettext_noop ("# TCP sessions active"),
+ 0,
GNUNET_NO);
return api;
+
+ die:
+ if (NULL != plugin->nat)
+ GNUNET_NAT_unregister (plugin->nat);
+ GNUNET_CONTAINER_multipeermap_destroy (plugin->sessionmap);
+ if (NULL != service)
+ LEGACY_SERVICE_stop (service);
+ GNUNET_free (plugin);
+ GNUNET_free_non_null (api);
+ return NULL;
}
/**
* Exit point from the plugin.
+ *
+ * @param cls the `struct GNUNET_TRANSPORT_PluginFunctions`
+ * @return NULL
*/
void *
libgnunet_plugin_transport_tcp_done (void *cls)
if (NULL == plugin)
{
- GNUNET_free (api);
- return NULL;
+ GNUNET_free(api);
+ return NULL ;
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Shutting down TCP plugin\n");
/* Removing leftover sessions */
GNUNET_CONTAINER_multipeermap_iterate (plugin->sessionmap,
- &session_disconnect_it, plugin);
+ &session_disconnect_it,
+ plugin);
/* Removing leftover NAT sessions */
GNUNET_CONTAINER_multipeermap_iterate (plugin->nat_wait_conns,
- &session_disconnect_it, plugin);
+ &session_disconnect_it,
+ plugin);
- next = ppc_dll_head;
- for (cur = next; NULL != cur; cur = next)
+ for (cur = plugin->ppc_dll_head; NULL != cur; cur = next)
{
next = cur->next;
- GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, cur);
- if (NULL != cur->resolver_handle)
- GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
- GNUNET_SCHEDULER_cancel (cur->timeout_task);
+ GNUNET_CONTAINER_DLL_remove (plugin->ppc_dll_head,
+ plugin->ppc_dll_tail,
+ cur);
+ GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
+ cur->asc (cur->asc_cls,
+ NULL,
+ GNUNET_OK);
GNUNET_free (cur);
- GNUNET_break (0);
}
- if (plugin->service != NULL)
- GNUNET_SERVICE_stop (plugin->service);
+ if (NULL != plugin->service)
+ LEGACY_SERVICE_stop (plugin->service);
else
GNUNET_SERVER_destroy (plugin->server);
GNUNET_free (plugin->handlers);
- if (plugin->nat != NULL)
+ if (NULL != plugin->nat)
GNUNET_NAT_unregister (plugin->nat);
while (NULL != (tcp_probe = plugin->probe_head))
{
- GNUNET_CONTAINER_DLL_remove (plugin->probe_head, plugin->probe_tail,
+ GNUNET_CONTAINER_DLL_remove (plugin->probe_head,
+ plugin->probe_tail,
tcp_probe);
GNUNET_CONNECTION_destroy (tcp_probe->sock);
GNUNET_free (tcp_probe);
}
GNUNET_CONTAINER_multipeermap_destroy (plugin->nat_wait_conns);
GNUNET_CONTAINER_multipeermap_destroy (plugin->sessionmap);
+ GNUNET_break (0 == plugin->cur_connections);
GNUNET_free (plugin);
GNUNET_free (api);
return NULL;
projects / oweals / gnunet.git / blobdiff