+++ /dev/null
- /*
- This file is part of GNUnet.
- (C) 2008--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.
-*/
-
-/**
- * @file stream/perf_stream_api.c
- * @brief performance benchmarks for stream api
- * @author Sree Harsha Totakura
- */
-
-#define LOG(kind, ...) \
- GNUNET_log (kind, __VA_ARGS__);
-
-/****************************************************************************************/
-/* Test is setup into the following major steps: */
-/* 1. Measurements over loopback (1 hop). i.e. we use only one peer and open */
-/* stream connections over loopback. Messages will go through */
-/* STREAM_API->MESH_API->MESH_SERVICE->MESH_API->STREAM_API. */
-/* 2. Measurements over 2 peers (2 hops). We use testbed to create 2 peers, */
-/* connect them and then create stream connections. Messages will go through */
-/* STREAM_API->MESH_API->MESH_SERVICE->CORE1.....CORE2->MESH_API->STREAM_API */
-/* 3. Measurements over 3 peers (3 hops). We use testbed to create 3 peers, */
-/* connect them in a line topology: peer1->peer2->peer3. Messages will go */
-/* through */
-/* STREAM_API->MESH_API->MESH_SERVICE->CORE1..CORE2..CORE3->MESH_API->STREAM_API. */
-/****************************************************************************************/
-
-#include "platform.h"
-#include "gnunet_common.h"
-#include "gnunet_util_lib.h"
-#include "gnunet_testbed_service.h"
-#include "gnunet_stream_lib.h"
-
-/**
- * Simple struct to keep track of progress, and print a
- * nice little percentage meter for long running tasks.
- */
-struct ProgressMeter
-{
- unsigned int total;
-
- unsigned int modnum;
-
- unsigned int dotnum;
-
- unsigned int completed;
-
- int print;
-
- char *startup_string;
-};
-
-
-/**
- * Steps in testing
- */
-enum TestStep
-{
- /**
- * Single hop loopback testing
- */
- TEST_STEP_1_HOP,
-
- /**
- * Testing with 2 peers
- */
- TEST_STEP_2_HOP,
-
- /**
- * Testing with 3 peers
- */
- TEST_STEP_3_HOP
-};
-
-
-/**
- * Structure for holding peer's sockets and IO Handles
- */
-struct PeerData
-{
- /**
- * Peer's stream socket
- */
- struct GNUNET_STREAM_Socket *socket;
-
- /**
- * Peer's io write handle
- */
- struct GNUNET_STREAM_WriteHandle *io_write_handle;
-
- /**
- * Peer's io read handle
- */
- struct GNUNET_STREAM_ReadHandle *io_read_handle;
-
- /**
- * The peer handle when we use the testbed servie
- */
- struct GNUNET_TESTBED_Peer *peer;
-
- /**
- * Handle to peer specific opearations while using testbed service
- */
- struct GNUNET_TESTBED_Operation *op;
-
- /**
- * The identity of this peer
- */
- struct GNUNET_PeerIdentity id;
-
- /**
- * Peer's shutdown handle
- */
- struct GNUNET_STREAM_ShutdownHandle *shutdown_handle;
-
- /**
- * Bytes the peer has written
- */
- size_t bytes_wrote;
-
- /**
- * Byte the peer has read
- */
- size_t bytes_read;
-
- /**
- * number of packets sent
- */
- unsigned int packets_wrote;
-
- /**
- * number of packets read
- */
- unsigned int packets_read;
-};
-
-
-/**
- * Enumeration of stages in this testing
- */
-enum TestStage
-{
- /**
- * The initial stage
- */
- INIT,
-
- /**
- * Uplink testing stage
- */
- UPLINK_OK,
-
- /**
- * Downlink testing stage
- */
- DOWNLINK_OK
-};
-
-
-/**
- * Maximum size of the data which we will transfer during tests
- */
-#define DATA_SIZE 5000000 /* 5mB */
-
-/**
- * Fixed number of packets we send in each direction during each subtest
- */
-#define MAX_PACKETS 1000
-
-/**
- * Listen socket of peer2
- */
-struct GNUNET_STREAM_ListenSocket *peer2_listen_socket;
-
-/**
- * Handle to configuration during TEST_STEP_1_HOP
- */
-const struct GNUNET_CONFIGURATION_Handle *config;
-
-/**
- * Handle for the progress meter
- */
-static struct ProgressMeter *meter;
-
-/**
- * Placeholder for peer data
- */
-static struct PeerData peer_data[3];
-
-/**
- * Handle to common operations while using testbed
- */
-static struct GNUNET_TESTBED_Operation *common_op;
-
-/**
- * Task ID for abort task
- */
-static GNUNET_SCHEDULER_TaskIdentifier abort_task;
-
-/**
- * Task ID for write task
- */
-static GNUNET_SCHEDULER_TaskIdentifier write_task;
-
-/**
- * Task ID for read task
- */
-static GNUNET_SCHEDULER_TaskIdentifier read_task;
-
-/**
- * Absolute time when profiling starts
- */
-static struct GNUNET_TIME_Absolute prof_start_time;
-
-/**
- * Test time taken for sending the data
- */
-static struct GNUNET_TIME_Relative prof_time;
-
-/**
- * Random data block. Should generate data first
- */
-static uint32_t data[DATA_SIZE / 4];
-
-/**
- * Payload sizes to test each major test with
- */
-static uint16_t payload_size[] =
-{ 20, 500, 2000, 7000, 13000, 25000, 30000};//, 50000, 60000, 63000, 64000 };
-
-/**
- * Current step of testing
- */
-static enum TestStep test_step;
-
-/**
- * Index for choosing payload size
- */
-static unsigned int payload_size_index;
-
-/**
- * Number of peers we want to create while using the testbed service
- */
-static int num_peers;
-
-/**
- * Flag to indicate that the other peer should reset its data read source index
- */
-static int reset_read;
-
-/**
- * Testing result of a major test
- */
-static enum TestStage result;
-
-/**
- * Create a meter to keep track of the progress of some task.
- *
- * @param total the total number of items to complete
- * @param start_string a string to prefix the meter with (if printing)
- * @param print GNUNET_YES to print the meter, GNUNET_NO to count
- * internally only
- *
- * @return the progress meter
- */
-static struct ProgressMeter *
-create_meter (unsigned int total, char *start_string, int print)
-{
- struct ProgressMeter *ret;
-
- ret = GNUNET_malloc (sizeof (struct ProgressMeter));
- ret->print = print;
- ret->total = total;
- ret->modnum = total / 4;
- if (ret->modnum == 0) /* Divide by zero check */
- ret->modnum = 1;
- ret->dotnum = (total / 50) + 1;
- if (start_string != NULL)
- ret->startup_string = GNUNET_strdup (start_string);
- else
- ret->startup_string = GNUNET_strdup ("");
-
- return ret;
-}
-
-
-/**
- * Update progress meter (increment by one).
- *
- * @param meter the meter to update and print info for
- *
- * @return GNUNET_YES if called the total requested,
- * GNUNET_NO if more items expected
- */
-static int
-update_meter (struct ProgressMeter *meter)
-{
- if (meter->print == GNUNET_YES)
- {
- if (meter->completed % meter->modnum == 0)
- {
- if (meter->completed == 0)
- {
- FPRINTF (stdout, "%sProgress: [0%%", meter->startup_string);
- }
- else
- FPRINTF (stdout, "%d%%",
- (int) (((float) meter->completed / meter->total) * 100));
- }
- else if (meter->completed % meter->dotnum == 0)
- FPRINTF (stdout, "%s", ".");
-
- if (meter->completed + 1 == meter->total)
- FPRINTF (stdout, "%d%%]\n", 100);
- fflush (stdout);
- }
- meter->completed++;
-
- if (meter->completed == meter->total)
- return GNUNET_YES;
- if (meter->completed > meter->total)
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Progress meter overflow!!\n");
- return GNUNET_NO;
-}
-
-
-/**
- * Reset progress meter.
- *
- * @param meter the meter to reset
- *
- * @return GNUNET_YES if meter reset,
- * GNUNET_SYSERR on error
- */
-static int
-reset_meter (struct ProgressMeter *meter)
-{
- if (meter == NULL)
- return GNUNET_SYSERR;
-
- meter->completed = 0;
- return GNUNET_YES;
-}
-
-
-/**
- * Release resources for meter
- *
- * @param meter the meter to free
- */
-static void
-free_meter (struct ProgressMeter *meter)
-{
- GNUNET_free_non_null (meter->startup_string);
- GNUNET_free (meter);
-}
-
-
-/**
- * Shutdown nicely
- */
-static void
-do_close (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- switch (test_step)
- {
- case TEST_STEP_1_HOP:
- if (NULL != peer_data[0].socket)
- GNUNET_STREAM_close (peer_data[0].socket);
- if (NULL != peer_data[1].socket)
- GNUNET_STREAM_close (peer_data[1].socket);
- if (NULL != peer2_listen_socket)
- GNUNET_STREAM_listen_close (peer2_listen_socket); /* Close listen socket */
- break;
- case TEST_STEP_2_HOP:
- if (NULL != peer_data[1].socket)
- GNUNET_STREAM_close (peer_data[1].socket);
- if (NULL != peer_data[0].op)
- GNUNET_TESTBED_operation_done (peer_data[0].op);
- if (NULL != peer_data[1].op)
- GNUNET_TESTBED_operation_done (peer_data[1].op);
- break;
- case TEST_STEP_3_HOP:
- GNUNET_break (0);
- }
- if (GNUNET_SCHEDULER_NO_TASK != abort_task)
- GNUNET_SCHEDULER_cancel (abort_task);
- if (GNUNET_SCHEDULER_NO_TASK != write_task)
- GNUNET_SCHEDULER_cancel (write_task);
- GNUNET_SCHEDULER_shutdown (); /* Shutdown this testcase */
- if (NULL != meter)
- {
- free_meter (meter);
- meter = NULL;
- }
-}
-
-
-/**
- * Something went wrong and timed out. Kill everything and set error flag
- */
-static void
-do_abort (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- abort_task = GNUNET_SCHEDULER_NO_TASK;
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "test: ABORT\n");
- if (GNUNET_SCHEDULER_NO_TASK != read_task)
- GNUNET_SCHEDULER_cancel (read_task);
- result = GNUNET_SYSERR;
- do_close (cls, tc);
-}
-
-
-/**
- * Completion callback for shutdown
- *
- * @param cls the closure from GNUNET_STREAM_shutdown call
- * @param operation the operation that was shutdown (SHUT_RD, SHUT_WR,
- * SHUT_RDWR)
- */
-static void
-shutdown_completion (void *cls,
- int operation)
-{
- static int shutdowns;
-
- if (++shutdowns == 1)
- {
- peer_data[0].shutdown_handle = NULL;
- peer_data[1].shutdown_handle = GNUNET_STREAM_shutdown (peer_data[1].socket, SHUT_RDWR,
- &shutdown_completion, cls);
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "STREAM shutdown successful\n");
- GNUNET_SCHEDULER_add_now (&do_close, cls);
-}
-
-
-/**
- * Shutdown sockets gracefully
- */
-static void
-do_shutdown (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- peer_data[0].shutdown_handle = GNUNET_STREAM_shutdown (peer_data[0].socket, SHUT_RDWR,
- &shutdown_completion, cls);
-}
-
-
-/**
- * Scheduler call back; to be executed when a new stream is connected
- * Called from listen connect for peer2
- */
-static void
-stream_read_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-
-/**
- * Task for calling STREAM_write with a chunk of random data
- *
- * @param cls the peer data entity
- * @param tc the task context
- */
-static void
-stream_write_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-
-/**
- * The write completion function; called upon writing some data to stream or
- * upon error
- *
- * @param cls the closure from GNUNET_STREAM_write/read
- * @param status the status of the stream at the time this function is called
- * @param size the number of bytes written
- */
-static void
-write_completion (void *cls, enum GNUNET_STREAM_Status status, size_t size)
-{
- struct PeerData *pdata = cls;
- double throughput;
- double prof_time_sec;
- unsigned int packets_wrote;
-
- if (GNUNET_STREAM_OK != status)
- {
- GNUNET_SCHEDULER_cancel (abort_task);
- abort_task = GNUNET_SCHEDULER_add_now (&do_abort, NULL);
- return;
- }
- GNUNET_assert (size <= DATA_SIZE);
- packets_wrote = (size + payload_size[payload_size_index] - 1)
- / payload_size[payload_size_index];
- pdata->bytes_wrote += size;
- for (;packets_wrote > 0; packets_wrote--)
- {
- update_meter (meter);
- pdata->packets_wrote++;
- }
- if (pdata->packets_wrote < MAX_PACKETS) /* Have more data to send */
- {
- size_t write_amount;
-
- if (GNUNET_SCHEDULER_NO_TASK != abort_task)
- {
- GNUNET_SCHEDULER_cancel (abort_task);
- abort_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
- (GNUNET_TIME_UNIT_SECONDS, 300), &do_abort,
- NULL);
- }
- write_amount = (MAX_PACKETS - pdata->packets_wrote) *
- payload_size[payload_size_index];
- if (write_amount > DATA_SIZE)
- write_amount = DATA_SIZE;
- reset_read = GNUNET_YES;
- pdata->io_write_handle = GNUNET_STREAM_write (pdata->socket, data,
- write_amount,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &write_completion, pdata);
- GNUNET_assert (NULL != pdata->io_write_handle);
- }
- else
- {
- free_meter (meter);
- meter = NULL;
- prof_time = GNUNET_TIME_absolute_get_duration (prof_start_time);
- prof_time_sec = (((double) prof_time.rel_value)/ ((double) 1000));
- throughput = ((float) pdata->bytes_wrote) / prof_time_sec;
- PRINTF ("Throughput %.2f kB/sec\n", throughput / 1000.00);
- switch (result)
- {
- case INIT:
- result = UPLINK_OK;
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == read_task);
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == write_task);
- pdata->bytes_read = 0;
- pdata->packets_read = 0;
- meter = create_meter (MAX_PACKETS, "Testing Downlink\n", GNUNET_YES);
- read_task = GNUNET_SCHEDULER_add_now (&stream_read_task, &peer_data[0]);
- write_task = GNUNET_SCHEDULER_add_now (&stream_write_task, &peer_data[1]);
- break;
- case UPLINK_OK:
- result = DOWNLINK_OK;
- GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
- break;
- case DOWNLINK_OK:
- GNUNET_assert (0);
- }
- }
-}
-
-
-/**
- * Task for calling STREAM_write with a chunk of random data
- *
- * @param cls the peer data entity
- * @param tc the task context
- */
-static void
-stream_write_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct PeerData *pdata = cls;
- size_t write_amount;
-
- if (GNUNET_SCHEDULER_NO_TASK != abort_task)
- {
- GNUNET_SCHEDULER_cancel (abort_task);
- abort_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
- (GNUNET_TIME_UNIT_SECONDS, 300), &do_abort,
- NULL);
- }
- write_task = GNUNET_SCHEDULER_NO_TASK;
- prof_start_time = GNUNET_TIME_absolute_get ();
- pdata->bytes_wrote = 0;
- pdata->packets_wrote = 0;
- write_amount = MAX_PACKETS * payload_size[payload_size_index];
- if (write_amount > DATA_SIZE)
- write_amount = DATA_SIZE;
- reset_read = GNUNET_YES;
- pdata->io_write_handle = GNUNET_STREAM_write (pdata->socket, data,
- write_amount,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &write_completion, pdata);
- GNUNET_assert (NULL != pdata->io_write_handle);
-}
-
-
-/**
- * Scheduler call back; to be executed when a new stream is connected
- * Called from listen connect for peer2
- */
-static void
-stream_read_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-
-/**
- * Input processor
- *
- * @param cls peer2
- * @param status the status of the stream at the time this function is called
- * @param data traffic from the other side
- * @param size the number of bytes available in data read
- * @return number of bytes of processed from 'data' (any data remaining should be
- * given to the next time the read processor is called).
- */
-static size_t
-input_processor (void *cls, enum GNUNET_STREAM_Status status,
- const void *input_data, size_t size)
-{
- struct PeerData *pdata = cls;
-
- if (GNUNET_STREAM_OK != status)
- {
- GNUNET_SCHEDULER_cancel (abort_task);
- abort_task = GNUNET_SCHEDULER_add_now (&do_abort, NULL);
- return 0;
- }
- GNUNET_assert (size <= DATA_SIZE);
- if (GNUNET_YES == reset_read)
- {
- pdata->bytes_read = 0;
- reset_read = GNUNET_NO;
- }
- GNUNET_assert ((pdata->bytes_read + size) <= DATA_SIZE);
- GNUNET_assert (0 == memcmp (((void *)data ) + pdata->bytes_read,
- input_data, size));
- pdata->bytes_read += size;
- pdata->packets_read += (size + payload_size[payload_size_index] - 1)
- / payload_size[payload_size_index];
- if (pdata->packets_read < MAX_PACKETS)
- {
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == read_task);
- read_task = GNUNET_SCHEDULER_add_now (&stream_read_task, pdata);
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Reading finished successfully\n");
- }
- return size;
-}
-
-
-/**
- * Scheduler call back; to be executed when a new stream is connected
- * Called from listen connect for peer2
- */
-static void
-stream_read_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct PeerData *pdata = cls;
-
- read_task = GNUNET_SCHEDULER_NO_TASK;
- pdata->io_read_handle =
- GNUNET_STREAM_read (pdata->socket, GNUNET_TIME_UNIT_FOREVER_REL,
- &input_processor, pdata);
- GNUNET_assert (NULL != pdata->io_read_handle);
-}
-
-
-/**
- * Functions of this type are called upon new stream connection from other peers
- *
- * @param cls the closure from GNUNET_STREAM_listen
- * @param socket the socket representing the stream
- * @param initiator the identity of the peer who wants to establish a stream
- * with us
- * @return GNUNET_OK to keep the socket open, GNUNET_SYSERR to close the
- * stream (the socket will be invalid after the call)
- */
-static int
-stream_listen_cb (void *cls, struct GNUNET_STREAM_Socket *socket,
- const struct GNUNET_PeerIdentity *initiator)
-{
- struct PeerData *pdata = cls;
-
-
- if ((NULL == socket) || (NULL == initiator))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Binding error\n");
- if (GNUNET_SCHEDULER_NO_TASK != abort_task)
- GNUNET_SCHEDULER_cancel (abort_task);
- abort_task = GNUNET_SCHEDULER_add_now (&do_abort, NULL);
- return GNUNET_OK;
- }
- GNUNET_assert (NULL != socket);
- GNUNET_assert (pdata == &peer_data[1]);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Peer connected: %s\n",
- GNUNET_i2s(initiator));
- pdata->socket = socket;
- pdata->bytes_read = 0;
- read_task = GNUNET_SCHEDULER_add_now (&stream_read_task, pdata);
- return GNUNET_OK;
-}
-
-
-/**
- * Function executed after stream has been established
- *
- * @param cls the closure from GNUNET_STREAM_open
- * @param socket socket to use to communicate with the other side (read/write)
- */
-static void
-stream_open_cb (void *cls,
- struct GNUNET_STREAM_Socket *socket)
-{
- struct PeerData *pdata = cls;
-
- GNUNET_assert (socket == pdata->socket);
- meter = create_meter (MAX_PACKETS, "Testing Uplink\n", GNUNET_YES);
- write_task = GNUNET_SCHEDULER_add_now (&stream_write_task, pdata);
-}
-
-
-/**
- * Listen success callback; connects a peer to stream as client
- */
-static void
-stream_connect (void)
-{
- peer_data[0].socket =
- GNUNET_STREAM_open (config, &peer_data[1].id, 10, &stream_open_cb,
- &peer_data[0],
- GNUNET_STREAM_OPTION_MAX_PAYLOAD_SIZE,
- payload_size[payload_size_index],
- GNUNET_STREAM_OPTION_END);
- GNUNET_assert (NULL != peer_data[0].socket);
-}
-
-
-/**
- * Initialize framework and start test
- *
- * @param cls closure
- * @param cfg configuration of the peer that was started
- * @param peer identity of the peer that was created
- */
-static void
-run (void *cls,
- const struct GNUNET_CONFIGURATION_Handle *cfg,
- struct GNUNET_TESTING_Peer *peer)
-{
- struct GNUNET_PeerIdentity id;
-
- GNUNET_TESTING_peer_get_identity (peer, &id);
- config = cfg;
- peer2_listen_socket =
- GNUNET_STREAM_listen (config, 10, &stream_listen_cb, &peer_data[1],
- GNUNET_STREAM_OPTION_SIGNAL_LISTEN_SUCCESS,
- &stream_connect,
- GNUNET_STREAM_OPTION_MAX_PAYLOAD_SIZE,
- payload_size[payload_size_index],
- GNUNET_STREAM_OPTION_END);
- GNUNET_assert (NULL != peer2_listen_socket);
- peer_data[0].id = id;
- peer_data[1].id = id;
- abort_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
- (GNUNET_TIME_UNIT_SECONDS, 300), &do_abort,
- NULL);
-}
-
-
-/**
- * Adapter function called to establish a connection to
- * a service.
- *
- * @param cls closure
- * @param cfg configuration of the peer to connect to; will be available until
- * GNUNET_TESTBED_operation_done() is called on the operation returned
- * from GNUNET_TESTBED_service_connect()
- * @return service handle to return in 'op_result', NULL on error
- */
-static void *
-stream_ca (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg);
-
-
-/**
- * Adapter function called to destroy a connection to
- * a service.
- *
- * @param cls closure
- * @param op_result service handle returned from the connect adapter
- */
-static void
-stream_da (void *cls, void *op_result)
-{
- if (&peer_data[1] == cls)
- {
- GNUNET_STREAM_listen_close (op_result);
- return;
- }
- else if (&peer_data[0] == cls)
- {
- GNUNET_STREAM_close (op_result);
- return;
- }
- GNUNET_assert (0);
-}
-
-
-/**
- * Listen success callback; connects a peer to stream as client. Called from
- * testbed stream_ca
- */
-static void
-stream_connect2 (void)
-{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Stream listen open successful\n");
- peer_data[0].op =
- GNUNET_TESTBED_service_connect (&peer_data[0], peer_data[0].peer,
- "stream", NULL, NULL, stream_ca,
- stream_da, &peer_data[0]);
-}
-
-
-/**
- * Adapter function called to establish a connection to
- * a service.
- *
- * @param cls closure
- * @param cfg configuration of the peer to connect to; will be available until
- * GNUNET_TESTBED_operation_done() is called on the operation returned
- * from GNUNET_TESTBED_service_connect()
- * @return service handle to return in 'op_result', NULL on error
- */
-static void *
-stream_ca (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg)
-{
- struct PeerData *pdata = cls;
-
- if (&peer_data[1] == pdata)
- {
- peer2_listen_socket = NULL;
- peer2_listen_socket =
- GNUNET_STREAM_listen (cfg, 10, &stream_listen_cb, &peer_data[1],
- GNUNET_STREAM_OPTION_SIGNAL_LISTEN_SUCCESS,
- &stream_connect2,
- GNUNET_STREAM_OPTION_MAX_PAYLOAD_SIZE,
- payload_size[payload_size_index],
- GNUNET_STREAM_OPTION_END);
- GNUNET_assert (NULL != peer2_listen_socket);
- return peer2_listen_socket;
- }
- if (&peer_data[0] == pdata)
- {
- pdata->socket =
- GNUNET_STREAM_open (cfg, &peer_data[1].id, 10, &stream_open_cb,
- &peer_data[0],
- GNUNET_STREAM_OPTION_MAX_PAYLOAD_SIZE,
- payload_size[payload_size_index],
- GNUNET_STREAM_OPTION_END);
- GNUNET_assert (NULL != pdata->socket);
- return pdata->socket;
- }
- GNUNET_assert (0);
- return NULL;
-}
-
-
-/**
- * Callback to be called when the requested peer information is available
- *
- * @param cb_cls the closure from GNUNET_TETSBED_peer_get_information()
- * @param op the operation this callback corresponds to
- * @param pinfo the result; will be NULL if the operation has failed
- * @param emsg error message if the operation has failed; will be NULL if the
- * operation is successfull
- */
-static void
-peerinfo_cb (void *cb_cls, struct GNUNET_TESTBED_Operation *op,
- const struct GNUNET_TESTBED_PeerInformation *pinfo,
- const char *emsg)
-{
- struct PeerData *pdata = cb_cls;
-
- GNUNET_assert (NULL == emsg);
- GNUNET_assert (common_op == op);
- GNUNET_assert (NULL != pdata);
- memcpy (&pdata->id, pinfo->result.id, sizeof (struct GNUNET_PeerIdentity));
- GNUNET_TESTBED_operation_done (op);
- if (pdata == &peer_data[0])
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Peer 1 id: %s\n",
- GNUNET_i2s (&pdata->id));
- common_op = GNUNET_TESTBED_peer_get_information (peer_data[1].peer,
- GNUNET_TESTBED_PIT_IDENTITY,
- &peerinfo_cb, &peer_data[1]);
- }
- else if (pdata == &peer_data[1])
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Peer 2 id: %s\n",
- GNUNET_i2s (&pdata->id));
- if (TEST_STEP_2_HOP == test_step)
- peer_data[1].op =
- GNUNET_TESTBED_service_connect (&peer_data[1], peer_data[1].peer,
- "stream", NULL, NULL, stream_ca,
- stream_da, &peer_data[1]);
- else
- GNUNET_break (0); /* FIXME: 3 hop test case here... */
- }
-}
-
-
-/**
- * Controller event callback
- *
- * @param cls NULL
- * @param event the controller event
- */
-static void
-controller_event_cb (void *cls,
- const struct GNUNET_TESTBED_EventInformation *event)
-{
- switch (event->type)
- {
- case GNUNET_TESTBED_ET_OPERATION_FINISHED:
- if (NULL != event->details.operation_finished.emsg)
- {
- FPRINTF (stderr, "Error while expecting an operation to succeed:%s \n",
- event->details.operation_finished.emsg);
- GNUNET_assert (0);
- }
- break;
- default:
- GNUNET_assert (0);
- }
-}
-
-
-/**
- * Signature of a main function for a testcase.
- *
- * @param cls closure
- * @param num_peers number of peers in 'peers'
- * @param peers handle to peers run in the testbed
- * @param links_succeeded the number of overlay link connection attempts that
- * succeeded
- * @param links_failed the number of overlay link connection attempts that
- * failed
- */
-static void
-test_master (void *cls, unsigned int num_peers_,
- struct GNUNET_TESTBED_Peer **peers,
- unsigned int links_succeeded,
- unsigned int links_failed)
-{
- GNUNET_assert (NULL != peers);
- GNUNET_assert (NULL != peers[0]);
- GNUNET_assert (NULL != peers[1]);
- GNUNET_assert (num_peers_ == num_peers);
- peer_data[0].peer = peers[0];
- peer_data[1].peer = peers[1];
- if (2 == num_peers)
- /* Get the peer identity and configuration of peers */
- common_op =
- GNUNET_TESTBED_peer_get_information (peer_data[0].peer,
- GNUNET_TESTBED_PIT_IDENTITY,
- &peerinfo_cb, &peer_data[0]);
- else
- GNUNET_break (0);
- abort_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
- (GNUNET_TIME_UNIT_SECONDS, 120), &do_abort,
- NULL);
-}
-
-
-/**
- * Main function
- */
-int main (int argc, char **argv)
-{
- char *test_name = "perf_stream_api";
- char *cfg_file = "test_stream_local.conf";
- uint64_t event_mask;
- unsigned int count;
- int ret;
-
- meter = create_meter ((sizeof (data) / 4), "Generating random data\n", GNUNET_YES);
- for (count=0; count < (sizeof (data) / 4); count++)
- {
- data[count] = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
- UINT32_MAX);
- update_meter (meter);
- }
- reset_meter (meter);
- free_meter (meter);
- meter = NULL;
- test_step = TEST_STEP_1_HOP;
- for (payload_size_index = 0;
- payload_size_index < (sizeof (payload_size) / sizeof (uint16_t));
- payload_size_index++)
- {
- PRINTF ("\nTesting over loopback with payload size %hu\n",
- payload_size[payload_size_index]);
- (void) memset (peer_data, 0, sizeof (peer_data));
- result = INIT;
- reset_read = GNUNET_NO;
- ret = GNUNET_TESTING_peer_run (test_name, cfg_file, &run, NULL);
- if ((0 != ret) || (DOWNLINK_OK != result))
- goto return_fail;
- }
- test_step = TEST_STEP_2_HOP;
- num_peers = 2;
- event_mask = 0;
- event_mask |= (1LL << GNUNET_TESTBED_ET_OPERATION_FINISHED);
- for (payload_size_index = 0;
- payload_size_index < (sizeof (payload_size) / sizeof (uint16_t));
- payload_size_index++)
- {
- PRINTF ("\nTesting over 1 hop with payload size %hu\n",
- payload_size[payload_size_index]);
- (void) memset (peer_data, 0, sizeof (peer_data));
- result = INIT;
- reset_read = GNUNET_NO;
- (void) GNUNET_TESTBED_test_run (test_name, cfg_file, num_peers, event_mask,
- &controller_event_cb, NULL, &test_master,
- NULL);
- if (DOWNLINK_OK != result)
- goto return_fail;
- }
- test_step = TEST_STEP_3_HOP;
- for (payload_size_index = 0;
- payload_size_index < (sizeof (payload_size) / sizeof (uint16_t));
- payload_size_index++)
- {
- /* Initialize testbed here */
- }
- return 0;
-
- return_fail:
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Test failed\n");
- return 1;
-}
-
-/* end of perf_stream_api.c */
+++ /dev/null
-/*
- This file is part of GNUnet.
- (C) 2008--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.
-*/
-
-/* TODO:
- *
- * Checks for matching the sender and socket->other_peer in server
- * message handlers
- *
- * Add code for write io timeout
- *
- * Include retransmission for control messages
- **/
-
-/**
- * @file stream/stream_api.c
- * @brief Implementation of the stream library
- * @author Sree Harsha Totakura
- */
-
-#include "platform.h"
-#include "gnunet_common.h"
-#include "gnunet_util_lib.h"
-#include "gnunet_lockmanager_service.h"
-#include "gnunet_statistics_service.h"
-#include "gnunet_stream_lib.h"
-#include "stream.h"
-
-#define STREAM_PORT 4242
-
-/**
- * Generic logging shorthand
- */
-#define LOG(kind,...) \
- GNUNET_log_from (kind, "stream-api", __VA_ARGS__)
-
-/**
- * Debug logging shorthand
- */
-#define LOG_DEBUG(...) \
- LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
-
-/**
- * Time in relative seconds shorthand
- */
-#define TIME_REL_SECS(sec) \
- GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, sec)
-
-/**
- * The maximum packet size of a stream packet
- */
-#define DEFAULT_MAX_PAYLOAD_SIZE 64000
-
-/**
- * Receive buffer
- */
-#define RECEIVE_BUFFER_SIZE 4096000
-
-/**
- * states in the Protocol
- */
-enum State
- {
- /**
- * Client initialization state
- */
- STATE_INIT,
-
- /**
- * Listener initialization state
- */
- STATE_LISTEN,
-
- /**
- * Pre-connection establishment state
- */
- STATE_HELLO_WAIT,
-
- /**
- * State where a connection has been established
- */
- STATE_ESTABLISHED,
-
- /**
- * State where the socket is closed on our side and waiting to be ACK'ed
- */
- STATE_RECEIVE_CLOSE_WAIT,
-
- /**
- * State where the socket is closed for reading
- */
- STATE_RECEIVE_CLOSED,
-
- /**
- * State where the socket is closed on our side and waiting to be ACK'ed
- */
- STATE_TRANSMIT_CLOSE_WAIT,
-
- /**
- * State where the socket is closed for writing
- */
- STATE_TRANSMIT_CLOSED,
-
- /**
- * State where the socket is closed on our side and waiting to be ACK'ed
- */
- STATE_CLOSE_WAIT,
-
- /**
- * State where the socket is closed
- */
- STATE_CLOSED
- };
-
-
-/**
- * Functions of this type are called when a message is written
- *
- * @param cls the closure from queue_message
- * @param socket the socket the written message was bound to
- */
-typedef void (*SendFinishCallback) (void *cls,
- struct GNUNET_STREAM_Socket *socket);
-
-
-/**
- * The send message queue
- */
-struct MessageQueue
-{
- /**
- * The message
- */
- struct GNUNET_MessageHeader *message;
-
- /**
- * Callback to be called when the message is sent
- */
- SendFinishCallback finish_cb;
-
- /**
- * The closure for finish_cb
- */
- void *finish_cb_cls;
-
- /**
- * The next message in queue. Should be NULL in the last message
- */
- struct MessageQueue *next;
-
- /**
- * The next message in queue. Should be NULL in the first message
- */
- struct MessageQueue *prev;
-};
-
-
-/**
- * The STREAM Socket Handler
- */
-struct GNUNET_STREAM_Socket
-{
- /**
- * The mesh handle
- */
- struct GNUNET_MESH_Handle *mesh;
-
- /**
- * Handle to statistics
- */
- struct GNUNET_STATISTICS_Handle *stat_handle;
-
- /**
- * The mesh tunnel handle
- */
- struct GNUNET_MESH_Tunnel *tunnel;
-
- /**
- * Stream open closure
- */
- void *open_cls;
-
- /**
- * Stream open callback
- */
- GNUNET_STREAM_OpenCallback open_cb;
-
- /**
- * The current transmit handle (if a pending transmit request exists)
- */
- struct GNUNET_MESH_TransmitHandle *transmit_handle;
-
- /**
- * The current message associated with the transmit handle
- */
- struct MessageQueue *queue_head;
-
- /**
- * The queue tail, should always point to the last message in queue
- */
- struct MessageQueue *queue_tail;
-
- /**
- * The write IO_handle associated with this socket
- */
- struct GNUNET_STREAM_WriteHandle *write_handle;
-
- /**
- * The read IO_handle associated with this socket
- */
- struct GNUNET_STREAM_ReadHandle *read_handle;
-
- /**
- * The shutdown handle associated with this socket
- */
- struct GNUNET_STREAM_ShutdownHandle *shutdown_handle;
-
- /**
- * Buffer for storing received messages
- */
- void *receive_buffer;
-
- /**
- * The listen socket from which this socket is derived. Should be NULL if it
- * is not a derived socket
- */
- struct GNUNET_STREAM_ListenSocket *lsocket;
-
- /**
- * The peer identity of the peer at the other end of the stream
- */
- struct GNUNET_PeerIdentity other_peer;
-
- /**
- * The Acknowledgement Bitmap
- */
- GNUNET_STREAM_AckBitmap ack_bitmap;
-
- /**
- * Task identifier for retransmission task after timeout
- */
- GNUNET_SCHEDULER_TaskIdentifier data_retransmission_task_id;
-
- /**
- * Task identifier for retransmission of control messages
- */
- GNUNET_SCHEDULER_TaskIdentifier control_retransmission_task_id;
-
- /**
- * The task for sending timely Acks
- */
- GNUNET_SCHEDULER_TaskIdentifier ack_task_id;
-
- /**
- * Retransmission timeout
- */
- struct GNUNET_TIME_Relative retransmit_timeout;
-
- /**
- * Time when the Acknowledgement was queued
- */
- struct GNUNET_TIME_Absolute ack_time_registered;
-
- /**
- * Queued Acknowledgement deadline
- */
- struct GNUNET_TIME_Relative ack_time_deadline;
-
- /**
- * Mesh transmit timeout
- */
- struct GNUNET_TIME_Relative mesh_retry_timeout;
-
- /**
- * Data retransmission timeout
- */
- struct GNUNET_TIME_Relative data_retransmit_timeout;
-
- /**
- * The state of the protocol associated with this socket
- */
- enum State state;
-
- /**
- * Whether testing mode is active or not
- */
- int testing_active;
-
- /**
- * Is receive closed
- */
- int receive_closed;
-
- /**
- * Is transmission closed
- */
- int transmit_closed;
-
- /**
- * The application port number
- */
- uint32_t port;
-
- /**
- * The write sequence number to be set incase of testing
- */
- uint32_t testing_set_write_sequence_number_value;
-
- /**
- * Write sequence number. Set to random when sending HELLO(client) and
- * HELLO_ACK(server)
- */
- uint32_t write_sequence_number;
-
- /**
- * Read sequence number. This number's value is determined during handshake
- */
- uint32_t read_sequence_number;
-
- /**
- * The receiver buffer size
- */
- uint32_t receive_buffer_size;
-
- /**
- * The receiver buffer boundaries
- */
- uint32_t receive_buffer_boundaries[GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH];
-
- /**
- * receiver's available buffer after the last acknowledged packet
- */
- uint32_t receiver_window_available;
-
- /**
- * The offset pointer used during write operation
- */
- uint32_t write_offset;
-
- /**
- * The offset after which we are expecting data
- */
- uint32_t read_offset;
-
- /**
- * The offset upto which user has read from the received buffer
- */
- uint32_t copy_offset;
-
- /**
- * The maximum size of the data message payload this stream handle can send
- */
- uint16_t max_payload_size;
-};
-
-
-/**
- * A socket for listening
- */
-struct GNUNET_STREAM_ListenSocket
-{
- /**
- * The mesh handle
- */
- struct GNUNET_MESH_Handle *mesh;
-
- /**
- * Handle to statistics
- */
- struct GNUNET_STATISTICS_Handle *stat_handle;
-
- /**
- * Our configuration
- */
- struct GNUNET_CONFIGURATION_Handle *cfg;
-
- /**
- * Handle to the lock manager service
- */
- struct GNUNET_LOCKMANAGER_Handle *lockmanager;
-
- /**
- * The active LockingRequest from lockmanager
- */
- struct GNUNET_LOCKMANAGER_LockingRequest *locking_request;
-
- /**
- * Callback to call after acquring a lock and listening
- */
- GNUNET_STREAM_ListenSuccessCallback listen_ok_cb;
-
- /**
- * The callback function which is called after successful opening socket
- */
- GNUNET_STREAM_ListenCallback listen_cb;
-
- /**
- * The call back closure
- */
- void *listen_cb_cls;
-
- /**
- * The service port
- */
- uint32_t port;
-
- /**
- * The id of the lockmanager timeout task
- */
- GNUNET_SCHEDULER_TaskIdentifier lockmanager_acquire_timeout_task;
-
- /**
- * The retransmit timeout
- */
- struct GNUNET_TIME_Relative retransmit_timeout;
-
- /**
- * Listen enabled?
- */
- int listening;
-
- /**
- * Whether testing mode is active or not
- */
- int testing_active;
-
- /**
- * The write sequence number to be set incase of testing
- */
- uint32_t testing_set_write_sequence_number_value;
-
- /**
- * The maximum size of the data message payload this stream handle can send
- */
- uint16_t max_payload_size;
-
-};
-
-
-/**
- * The IO Write Handle
- */
-struct GNUNET_STREAM_WriteHandle
-{
- /**
- * The socket to which this write handle is associated
- */
- struct GNUNET_STREAM_Socket *socket;
-
- /**
- * The write continuation callback
- */
- GNUNET_STREAM_CompletionContinuation write_cont;
-
- /**
- * Write continuation closure
- */
- void *write_cont_cls;
-
- /**
- * The packet_buffers associated with this Handle
- */
- struct GNUNET_STREAM_DataMessage *messages[GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH];
-
- /**
- * The bitmap of this IOHandle; Corresponding bit for a message is set when
- * it has been acknowledged by the receiver
- */
- GNUNET_STREAM_AckBitmap ack_bitmap;
-
- /**
- * Number of bytes in this write handle
- */
- size_t size;
-
- /**
- * Number of packets already transmitted from this IO handle. Retransmitted
- * packets are not taken into account here. This is used to determine which
- * packets account for retransmission and which packets occupy buffer space at
- * the receiver.
- */
- unsigned int packets_sent;
-
- /**
- * The maximum of the base numbers of the received acks
- */
- uint32_t max_ack_base_num;
-
-};
-
-
-/**
- * The IO Read Handle
- */
-struct GNUNET_STREAM_ReadHandle
-{
- /**
- * The socket to which this read handle is associated
- */
- struct GNUNET_STREAM_Socket *socket;
-
- /**
- * Callback for the read processor
- */
- GNUNET_STREAM_DataProcessor proc;
-
- /**
- * The closure pointer for the read processor callback
- */
- void *proc_cls;
-
- /**
- * Task identifier for the read io timeout task
- */
- GNUNET_SCHEDULER_TaskIdentifier read_io_timeout_task_id;
-
- /**
- * Task scheduled to continue a read operation.
- */
- GNUNET_SCHEDULER_TaskIdentifier read_task_id;
-
- /**
- * Task scheduled from GNUNET_STREAM_read() to lookup the ACK bitmap and call
- * the read processor task
- */
- GNUNET_SCHEDULER_TaskIdentifier probe_data_availability_task_id;
-};
-
-
-/**
- * Handle for Shutdown
- */
-struct GNUNET_STREAM_ShutdownHandle
-{
- /**
- * The socket associated with this shutdown handle
- */
- struct GNUNET_STREAM_Socket *socket;
-
- /**
- * Shutdown completion callback
- */
- GNUNET_STREAM_ShutdownCompletion completion_cb;
-
- /**
- * Closure for completion callback
- */
- void *completion_cls;
-
- /**
- * Close message retransmission task id
- */
- GNUNET_SCHEDULER_TaskIdentifier close_msg_retransmission_task_id;
-
- /**
- * Task scheduled to call the shutdown continuation callback
- */
- GNUNET_SCHEDULER_TaskIdentifier call_cont_task_id;
-
- /**
- * Which operation to shutdown? SHUT_RD, SHUT_WR or SHUT_RDWR
- */
- int operation;
-};
-
-
-/**
- * Collection of the state necessary to read and write gnunet messages
- * to a stream socket. Should be used as closure for stream_data_processor.
- */
-struct MQStreamState
-{
- /**
- * Message stream tokenizer for the data received from the
- * stream socket.
- */
- struct GNUNET_SERVER_MessageStreamTokenizer *mst;
-
- /**
- * The stream socket to use for receiving and transmitting
- * messages with the message queue.
- */
- struct GNUNET_STREAM_Socket *socket;
-
- /**
- * Current read handle, NULL if no read active.
- */
- struct GNUNET_STREAM_ReadHandle *rh;
-
- /**
- * Current write handle, NULL if no write active.
- */
- struct GNUNET_STREAM_WriteHandle *wh;
-};
-
-
-
-/**
- * Default value in seconds for various timeouts
- */
-static const unsigned int default_timeout = 10;
-
-/**
- * The domain name for locks we use here
- */
-static const char *locking_domain = "GNUNET_STREAM_APPLOCK";
-
-/**
- * Callback function for sending queued message
- *
- * @param cls closure the socket
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
- */
-static size_t
-send_message_notify (void *cls, size_t size, void *buf)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
- struct MessageQueue *head;
- size_t ret;
-
- socket->transmit_handle = NULL; /* Remove the transmit handle */
- head = socket->queue_head;
- if (NULL == head)
- return 0; /* just to be safe */
- if (0 == size) /* request timed out */
- {
- socket->mesh_retry_timeout = GNUNET_TIME_STD_BACKOFF
- (socket->mesh_retry_timeout);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Message sending to MESH timed out. Retrying in %s \n",
- GNUNET_i2s (&socket->other_peer),
- GNUNET_STRINGS_relative_time_to_string (socket->mesh_retry_timeout,
- GNUNET_YES));
- socket->transmit_handle =
- GNUNET_MESH_notify_transmit_ready (socket->tunnel,
- GNUNET_NO, /* Corking */
- socket->mesh_retry_timeout,
- ntohs (head->message->size),
- &send_message_notify,
- socket);
- return 0;
- }
- ret = ntohs (head->message->size);
- GNUNET_assert (size >= ret);
- memcpy (buf, head->message, ret);
- if (NULL != head->finish_cb)
- {
- head->finish_cb (head->finish_cb_cls, socket);
- }
- GNUNET_CONTAINER_DLL_remove (socket->queue_head,
- socket->queue_tail,
- head);
- GNUNET_free (head->message);
- GNUNET_free (head);
- if (NULL != socket->transmit_handle)
- return ret; /* 'finish_cb' might have triggered message already! */
- head = socket->queue_head;
- if (NULL != head) /* more pending messages to send */
- {
- socket->mesh_retry_timeout = GNUNET_TIME_UNIT_ZERO;
- socket->transmit_handle =
- GNUNET_MESH_notify_transmit_ready (socket->tunnel,
- GNUNET_NO, /* Corking */
- socket->mesh_retry_timeout,
- ntohs (head->message->size),
- &send_message_notify,
- socket);
- }
- return ret;
-}
-
-
-/**
- * Queues a message for sending using the mesh connection of a socket
- *
- * @param socket the socket whose mesh connection is used
- * @param message the message to be sent
- * @param finish_cb the callback to be called when the message is sent
- * @param finish_cb_cls the closure for the callback
- * @param urgent set to GNUNET_YES to add the message to the beginning of the
- * queue; GNUNET_NO to add at the tail
- */
-static void
-queue_message (struct GNUNET_STREAM_Socket *socket,
- struct GNUNET_MessageHeader *message,
- SendFinishCallback finish_cb,
- void *finish_cb_cls,
- int urgent)
-{
- struct MessageQueue *queue_entity;
-
- GNUNET_assert ((ntohs (message->type) >= GNUNET_MESSAGE_TYPE_STREAM_DATA)
- && (ntohs (message->type)
- <= GNUNET_MESSAGE_TYPE_STREAM_CLOSE_ACK));
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Queueing message of type %d and size %d\n",
- GNUNET_i2s (&socket->other_peer),
- ntohs (message->type),ntohs (message->size));
- GNUNET_assert (NULL != message);
- queue_entity = GNUNET_malloc (sizeof (struct MessageQueue));
- queue_entity->message = message;
- queue_entity->finish_cb = finish_cb;
- queue_entity->finish_cb_cls = finish_cb_cls;
- if (GNUNET_YES == urgent)
- {
- GNUNET_CONTAINER_DLL_insert (socket->queue_head, socket->queue_tail,
- queue_entity);
- if (NULL != socket->transmit_handle)
- {
- GNUNET_MESH_notify_transmit_ready_cancel (socket->transmit_handle);
- socket->transmit_handle = NULL;
- }
- }
- else
- GNUNET_CONTAINER_DLL_insert_tail (socket->queue_head,
- socket->queue_tail,
- queue_entity);
- if (NULL == socket->transmit_handle)
- {
- socket->mesh_retry_timeout = GNUNET_TIME_UNIT_ZERO;
- socket->transmit_handle =
- GNUNET_MESH_notify_transmit_ready (socket->tunnel,
- GNUNET_NO, /* Corking */
- socket->mesh_retry_timeout,
- ntohs (message->size),
- &send_message_notify,
- socket);
- }
-}
-
-
-/**
- * Copies a message and queues it for sending using the mesh connection of
- * given socket
- *
- * @param socket the socket whose mesh connection is used
- * @param message the message to be sent
- * @param finish_cb the callback to be called when the message is sent
- * @param finish_cb_cls the closure for the callback
- */
-static void
-copy_and_queue_message (struct GNUNET_STREAM_Socket *socket,
- const struct GNUNET_MessageHeader *message,
- SendFinishCallback finish_cb,
- void *finish_cb_cls)
-{
- struct GNUNET_MessageHeader *msg_copy;
- uint16_t size;
-
- size = ntohs (message->size);
- msg_copy = GNUNET_malloc (size);
- memcpy (msg_copy, message, size);
- queue_message (socket, msg_copy, finish_cb, finish_cb_cls, GNUNET_NO);
-}
-
-
-/**
- * Writes data using the given socket. The amount of data written is limited by
- * the receiver_window_size
- *
- * @param socket the socket to use
- */
-static void
-write_data (struct GNUNET_STREAM_Socket *socket);
-
-
-/**
- * Task for retransmitting data messages if they aren't ACK before their ack
- * deadline
- *
- * @param cls the socket
- * @param tc the Task context
- */
-static void
-data_retransmission_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- socket->data_retransmission_task_id = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
- return;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Retransmitting DATA...\n", GNUNET_i2s (&socket->other_peer));
- write_data (socket);
-}
-
-
-/**
- * Task for sending ACK message
- *
- * @param cls the socket
- * @param tc the Task context
- */
-static void
-ack_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
- struct GNUNET_STREAM_AckMessage *ack_msg;
-
- socket->ack_task_id = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
- return;
- /* Create the ACK Message */
- ack_msg = GNUNET_malloc (sizeof (struct GNUNET_STREAM_AckMessage));
- ack_msg->header.size = htons (sizeof (struct
- GNUNET_STREAM_AckMessage));
- ack_msg->header.type = htons (GNUNET_MESSAGE_TYPE_STREAM_ACK);
- ack_msg->bitmap = GNUNET_htonll (socket->ack_bitmap);
- ack_msg->base_sequence_number = htonl (socket->read_sequence_number);
- ack_msg->receive_window_remaining =
- htonl (RECEIVE_BUFFER_SIZE - socket->receive_buffer_size);
- /* Queue up ACK for immediate sending */
- queue_message (socket, &ack_msg->header, NULL, NULL, GNUNET_YES);
-}
-
-
-/**
- * Retransmission task for shutdown messages
- *
- * @param cls the shutdown handle
- * @param tc the Task Context
- */
-static void
-close_msg_retransmission_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_STREAM_ShutdownHandle *shutdown_handle = cls;
- struct GNUNET_MessageHeader *msg;
- struct GNUNET_STREAM_Socket *socket;
-
- shutdown_handle->close_msg_retransmission_task_id = GNUNET_SCHEDULER_NO_TASK;
- GNUNET_assert (NULL != shutdown_handle);
- if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
- return;
- socket = shutdown_handle->socket;
- msg = GNUNET_malloc (sizeof (struct GNUNET_MessageHeader));
- msg->size = htons (sizeof (struct GNUNET_MessageHeader));
- switch (shutdown_handle->operation)
- {
- case SHUT_RDWR:
- msg->type = htons (GNUNET_MESSAGE_TYPE_STREAM_CLOSE);
- break;
- case SHUT_RD:
- msg->type = htons (GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE);
- break;
- case SHUT_WR:
- msg->type = htons (GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE);
- break;
- default:
- GNUNET_free (msg);
- shutdown_handle->close_msg_retransmission_task_id =
- GNUNET_SCHEDULER_NO_TASK;
- return;
- }
- queue_message (socket, msg, NULL, NULL, GNUNET_NO);
- shutdown_handle->close_msg_retransmission_task_id =
- GNUNET_SCHEDULER_add_delayed (socket->retransmit_timeout,
- &close_msg_retransmission_task,
- shutdown_handle);
-}
-
-
-/**
- * Function to modify a bit in GNUNET_STREAM_AckBitmap
- *
- * @param bitmap the bitmap to modify
- * @param bit the bit number to modify
- * @param value GNUNET_YES to on, GNUNET_NO to off
- */
-static void
-ackbitmap_modify_bit (GNUNET_STREAM_AckBitmap *bitmap,
- unsigned int bit,
- int value)
-{
- GNUNET_assert (bit < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH);
- if (GNUNET_YES == value)
- *bitmap |= (1LL << bit);
- else
- *bitmap &= ~(1LL << bit);
-}
-
-
-/**
- * Function to check if a bit is set in the GNUNET_STREAM_AckBitmap
- *
- * @param bitmap address of the bitmap that has to be checked
- * @param bit the bit number to check
- * @return GNUNET_YES if the bit is set; GNUNET_NO if not
- */
-static uint8_t
-ackbitmap_is_bit_set (const GNUNET_STREAM_AckBitmap *bitmap,
- unsigned int bit)
-{
- GNUNET_assert (bit < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH);
- return 0 != (*bitmap & (1LL << bit));
-}
-
-
-/**
- * Writes data using the given socket. The amount of data written is limited by
- * the receiver_window_size
- *
- * @param socket the socket to use
- */
-static void
-write_data (struct GNUNET_STREAM_Socket *socket)
-{
- struct GNUNET_STREAM_WriteHandle *io_handle = socket->write_handle;
- unsigned int packet;
-
- for (packet=0; packet < io_handle->packets_sent; packet++)
- {
- if (GNUNET_NO == ackbitmap_is_bit_set (&io_handle->ack_bitmap,
- packet))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Retransmitting DATA message with sequence %u\n",
- GNUNET_i2s (&socket->other_peer),
- ntohl (io_handle->messages[packet]->sequence_number));
- copy_and_queue_message (socket,
- &io_handle->messages[packet]->header,
- NULL,
- NULL);
- }
- }
- /* Now send new packets if there is enough buffer space */
- while ((packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH) &&
- (NULL != io_handle->messages[packet]) &&
- (socket->receiver_window_available
- >= ntohs (io_handle->messages[packet]->header.size)))
- {
- socket->receiver_window_available -=
- ntohs (io_handle->messages[packet]->header.size);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Placing DATA message with sequence %u in send queue\n",
- GNUNET_i2s (&socket->other_peer),
- ntohl (io_handle->messages[packet]->sequence_number));
- copy_and_queue_message (socket,
- &io_handle->messages[packet]->header,
- NULL,
- NULL);
- packet++;
- }
- io_handle->packets_sent = packet;
- if (GNUNET_SCHEDULER_NO_TASK == socket->data_retransmission_task_id)
- {
- socket->data_retransmit_timeout = GNUNET_TIME_STD_BACKOFF
- (socket->data_retransmit_timeout);
- socket->data_retransmission_task_id =
- GNUNET_SCHEDULER_add_delayed (socket->data_retransmit_timeout,
- &data_retransmission_task,
- socket);
- }
-}
-
-
-/**
- * Cleansup the sockets read handle
- *
- * @param socket the socket whose read handle has to be cleanedup
- */
-static void
-cleanup_read_handle (struct GNUNET_STREAM_Socket *socket)
-{
- struct GNUNET_STREAM_ReadHandle *read_handle;
-
- read_handle = socket->read_handle;
- /* Read io time task should be there; if it is already executed then this
- read handle is not valid; However upon scheduler shutdown the read io task
- may be executed before */
- if (GNUNET_SCHEDULER_NO_TASK != read_handle->read_io_timeout_task_id)
- GNUNET_SCHEDULER_cancel (read_handle->read_io_timeout_task_id);
- /* reading task may be present; if so we have to stop it */
- if (GNUNET_SCHEDULER_NO_TASK != read_handle->read_task_id)
- GNUNET_SCHEDULER_cancel (read_handle->read_task_id);
- if (GNUNET_SCHEDULER_NO_TASK != read_handle->probe_data_availability_task_id)
- GNUNET_SCHEDULER_cancel (read_handle->probe_data_availability_task_id);
- GNUNET_free (read_handle);
- socket->read_handle = NULL;
-}
-
-
-/**
- * Task for calling the read processor
- *
- * @param cls the socket
- * @param tc the task context
- */
-static void
-call_read_processor (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
- struct GNUNET_STREAM_ReadHandle *read_handle;
- GNUNET_STREAM_DataProcessor proc;
- void *proc_cls;
- size_t read_size;
- size_t valid_read_size;
- unsigned int packet;
- uint32_t sequence_increase;
- uint32_t offset_increase;
-
- read_handle = socket->read_handle;
- GNUNET_assert (NULL != read_handle);
- read_handle->read_task_id = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
- if (NULL == socket->receive_buffer)
- return;
- GNUNET_assert (NULL != read_handle->proc);
- /* Check the bitmap for any holes */
- for (packet=0; packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH; packet++)
- {
- if (GNUNET_NO == ackbitmap_is_bit_set (&socket->ack_bitmap,
- packet))
- break;
- }
- /* We only call read processor if we have the first packet */
- GNUNET_assert (0 < packet);
- valid_read_size =
- socket->receive_buffer_boundaries[packet-1] - socket->copy_offset;
- GNUNET_assert (0 != valid_read_size);
- proc = read_handle->proc;
- proc_cls = read_handle->proc_cls;
- cleanup_read_handle (socket);
- /* Call the data processor */
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Calling read processor\n",
- GNUNET_i2s (&socket->other_peer));
- read_size = proc (proc_cls, GNUNET_STREAM_OK,
- socket->receive_buffer + socket->copy_offset,
- valid_read_size);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Read processor read %d bytes\n",
- GNUNET_i2s (&socket->other_peer), read_size);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Read processor completed successfully\n",
- GNUNET_i2s (&socket->other_peer));
- GNUNET_assert (read_size <= valid_read_size);
- socket->copy_offset += read_size;
- /* Determine upto which packet we can remove from the buffer */
- for (packet = 0; packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH; packet++)
- {
- if (socket->copy_offset == socket->receive_buffer_boundaries[packet])
- {
- packet++;
- break;
- }
- if (socket->copy_offset < socket->receive_buffer_boundaries[packet])
- break;
- }
- /* If no packets can be removed we can't move the buffer */
- if (0 == packet)
- return;
- sequence_increase = packet;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Sequence increase after read processor completion: %u\n",
- GNUNET_i2s (&socket->other_peer), sequence_increase);
- /* Shift the data in the receive buffer */
- socket->receive_buffer =
- memmove (socket->receive_buffer,
- socket->receive_buffer
- + socket->receive_buffer_boundaries[sequence_increase-1],
- socket->receive_buffer_size
- - socket->receive_buffer_boundaries[sequence_increase-1]);
- /* Shift the bitmap */
- socket->ack_bitmap = socket->ack_bitmap >> sequence_increase;
- /* Set read_sequence_number */
- socket->read_sequence_number += sequence_increase;
- /* Set read_offset */
- offset_increase = socket->receive_buffer_boundaries[sequence_increase-1];
- socket->read_offset += offset_increase;
- /* Fix copy_offset */
- GNUNET_assert (offset_increase <= socket->copy_offset);
- socket->copy_offset -= offset_increase;
- /* Fix relative boundaries */
- for (packet=0; packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH; packet++)
- {
- if (packet < (GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH - sequence_increase))
- {
- uint32_t ahead_buffer_boundary;
-
- ahead_buffer_boundary =
- socket->receive_buffer_boundaries[packet + sequence_increase];
- if (0 == ahead_buffer_boundary)
- socket->receive_buffer_boundaries[packet] = 0;
- else
- {
- GNUNET_assert (offset_increase < ahead_buffer_boundary);
- socket->receive_buffer_boundaries[packet] =
- ahead_buffer_boundary - offset_increase;
- }
- }
- else
- socket->receive_buffer_boundaries[packet] = 0;
- }
-}
-
-
-/**
- * Cancels the existing read io handle
- *
- * @param cls the closure from the SCHEDULER call
- * @param tc the task context
- */
-static void
-read_io_timeout (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
- struct GNUNET_STREAM_ReadHandle *read_handle;
- GNUNET_STREAM_DataProcessor proc;
- void *proc_cls;
-
- read_handle = socket->read_handle;
- GNUNET_assert (NULL != read_handle);
- read_handle->read_io_timeout_task_id = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
- return;
- if (read_handle->read_task_id != GNUNET_SCHEDULER_NO_TASK)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Read task timedout - Cancelling it\n",
- GNUNET_i2s (&socket->other_peer));
- GNUNET_SCHEDULER_cancel (read_handle->read_task_id);
- read_handle->read_task_id = GNUNET_SCHEDULER_NO_TASK;
- }
- proc = read_handle->proc;
- proc_cls = read_handle->proc_cls;
- GNUNET_free (read_handle);
- socket->read_handle = NULL;
- /* Call the read processor to signal timeout */
- proc (proc_cls,
- GNUNET_STREAM_TIMEOUT,
- NULL,
- 0);
-}
-
-
-/**
- * Handler for DATA messages; Same for both client and server
- *
- * @param socket the socket through which the ack was received
- * @param tunnel connection to the other end
- * @param msg the data message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_data (struct GNUNET_STREAM_Socket *socket,
- struct GNUNET_MESH_Tunnel *tunnel,
- const struct GNUNET_STREAM_DataMessage *msg)
-{
- const void *payload;
- struct GNUNET_TIME_Relative ack_deadline_rel;
- uint32_t bytes_needed;
- uint32_t relative_offset;
- uint32_t relative_sequence_number;
- uint16_t size;
-
- size = htons (msg->header.size);
- if (size < sizeof (struct GNUNET_STREAM_DataMessage))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- switch (socket->state)
- {
- case STATE_ESTABLISHED:
- case STATE_TRANSMIT_CLOSED:
- case STATE_TRANSMIT_CLOSE_WAIT:
- /* check if the message's sequence number is in the range we are
- expecting */
- relative_sequence_number =
- ntohl (msg->sequence_number) - socket->read_sequence_number;
- if ( relative_sequence_number >= GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Ignoring received message with sequence number %u\n",
- GNUNET_i2s (&socket->other_peer),
- ntohl (msg->sequence_number));
- /* Start ACK sending task if one is not already present */
- if (GNUNET_SCHEDULER_NO_TASK == socket->ack_task_id)
- {
- socket->ack_task_id =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_ntoh
- (msg->ack_deadline),
- &ack_task,
- socket);
- }
- return GNUNET_YES;
- }
- /* Check if we have already seen this message */
- if (GNUNET_YES == ackbitmap_is_bit_set (&socket->ack_bitmap,
- relative_sequence_number))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Ignoring already received message with sequence number %u\n",
- GNUNET_i2s (&socket->other_peer),
- ntohl (msg->sequence_number));
- /* Start ACK sending task if one is not already present */
- if (GNUNET_SCHEDULER_NO_TASK == socket->ack_task_id)
- {
- socket->ack_task_id =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_ntoh
- (msg->ack_deadline), &ack_task, socket);
- }
- return GNUNET_YES;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%1$s: Receiving DATA with sequence number: %2$u and size: %3$d from "
- "%1$s\n", GNUNET_i2s (&socket->other_peer),
- ntohl (msg->sequence_number), ntohs (msg->header.size));
- /* Check if we have to allocate the buffer */
- size -= sizeof (struct GNUNET_STREAM_DataMessage);
- relative_offset = ntohl (msg->offset) - socket->read_offset;
- bytes_needed = relative_offset + size;
- if (bytes_needed > socket->receive_buffer_size)
- {
- if (bytes_needed <= RECEIVE_BUFFER_SIZE)
- {
- socket->receive_buffer = GNUNET_realloc (socket->receive_buffer,
- bytes_needed);
- socket->receive_buffer_size = bytes_needed;
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Cannot accommodate packet %d as buffer is full\n",
- GNUNET_i2s (&socket->other_peer), ntohl (msg->sequence_number));
- return GNUNET_YES;
- }
- }
- /* Copy Data to buffer */
- payload = &msg[1];
- GNUNET_assert (relative_offset + size <= socket->receive_buffer_size);
- memcpy (socket->receive_buffer + relative_offset, payload, size);
- socket->receive_buffer_boundaries[relative_sequence_number] =
- relative_offset + size;
- /* Modify the ACK bitmap */
- ackbitmap_modify_bit (&socket->ack_bitmap, relative_sequence_number,
- GNUNET_YES);
- /* Start ACK sending task if one is not already present */
- ack_deadline_rel = GNUNET_TIME_relative_ntoh (msg->ack_deadline);
- if (GNUNET_SCHEDULER_NO_TASK == socket->ack_task_id)
- {
- ack_deadline_rel =
- GNUNET_TIME_relative_min (ack_deadline_rel,
- GNUNET_TIME_relative_multiply
- (GNUNET_TIME_UNIT_SECONDS, 300));
- socket->ack_task_id =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_ntoh
- (msg->ack_deadline), &ack_task, socket);
- socket->ack_time_registered = GNUNET_TIME_absolute_get ();
- socket->ack_time_deadline = ack_deadline_rel;
- }
- else
- {
- struct GNUNET_TIME_Relative ack_time_past;
- struct GNUNET_TIME_Relative ack_time_remaining;
- struct GNUNET_TIME_Relative ack_time_min;
- ack_time_past =
- GNUNET_TIME_absolute_get_duration (socket->ack_time_registered);
- ack_time_remaining = GNUNET_TIME_relative_subtract
- (socket->ack_time_deadline, ack_time_past);
- ack_time_min = GNUNET_TIME_relative_min (ack_time_remaining,
- ack_deadline_rel);
- if (0 == memcmp(&ack_deadline_rel, &ack_time_min,
- sizeof (struct GNUNET_TIME_Relative)))
- {
- ack_deadline_rel = ack_time_min;
- GNUNET_SCHEDULER_cancel (socket->ack_task_id);
- socket->ack_task_id = GNUNET_SCHEDULER_add_delayed (ack_deadline_rel,
- &ack_task, socket);
- socket->ack_time_registered = GNUNET_TIME_absolute_get ();
- socket->ack_time_deadline = ack_deadline_rel;
- }
- }
- if ((NULL != socket->read_handle) /* A read handle is waiting */
- /* There is no current read task */
- && (GNUNET_SCHEDULER_NO_TASK == socket->read_handle->read_task_id)
- /* We have the first packet */
- && (GNUNET_YES == ackbitmap_is_bit_set(&socket->ack_bitmap, 0)))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Scheduling read processor\n",
- GNUNET_i2s (&socket->other_peer));
- socket->read_handle->read_task_id =
- GNUNET_SCHEDULER_add_now (&call_read_processor, socket);
- }
- break;
- default:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received data message when it cannot be handled\n",
- GNUNET_i2s (&socket->other_peer));
- break;
- }
- return GNUNET_YES;
-}
-
-
-/**
- * Client's message Handler for GNUNET_MESSAGE_TYPE_STREAM_DATA
- *
- * @param cls the socket (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end
- * @param tunnel_ctx place to store local state associated with the tunnel
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_data (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- return handle_data (socket, tunnel,
- (const struct GNUNET_STREAM_DataMessage *) message);
-}
-
-
-/**
- * Callback to set state to ESTABLISHED
- *
- * @param cls the closure NULL;
- * @param socket the socket to requiring state change
- */
-static void
-set_state_established (void *cls,
- struct GNUNET_STREAM_Socket *socket)
-{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Attaining ESTABLISHED state\n",
- GNUNET_i2s (&socket->other_peer));
- socket->write_offset = 0;
- socket->read_offset = 0;
- socket->state = STATE_ESTABLISHED;
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK !=
- socket->control_retransmission_task_id);
- GNUNET_SCHEDULER_cancel (socket->control_retransmission_task_id);
- socket->control_retransmission_task_id = GNUNET_SCHEDULER_NO_TASK;
- if (NULL != socket->lsocket)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Calling listen callback\n",
- GNUNET_i2s (&socket->other_peer));
- if (GNUNET_SYSERR ==
- socket->lsocket->listen_cb (socket->lsocket->listen_cb_cls,
- socket,
- &socket->other_peer))
- {
- socket->state = STATE_CLOSED;
- /* FIXME: We should close in a decent way (send RST) */
- GNUNET_MESH_tunnel_destroy (socket->tunnel); /* Destroy the tunnel */
- GNUNET_free (socket);
- }
- }
- else
- socket->open_cb (socket->open_cls, socket);
-}
-
-
-/**
- * Callback to set state to HELLO_WAIT
- *
- * @param cls the closure from queue_message
- * @param socket the socket to requiring state change
- */
-static void
-set_state_hello_wait (void *cls,
- struct GNUNET_STREAM_Socket *socket)
-{
- GNUNET_assert (STATE_INIT == socket->state);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Attaining HELLO_WAIT state\n",
- GNUNET_i2s (&socket->other_peer));
- socket->state = STATE_HELLO_WAIT;
-}
-
-
-/**
- * Callback to set state to CLOSE_WAIT
- *
- * @param cls the closure from queue_message
- * @param socket the socket requiring state change
- */
-static void
-set_state_close_wait (void *cls,
- struct GNUNET_STREAM_Socket *socket)
-{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Attaing CLOSE_WAIT state\n",
- GNUNET_i2s (&socket->other_peer));
- socket->state = STATE_CLOSE_WAIT;
- GNUNET_free_non_null (socket->receive_buffer); /* Free the receive buffer */
- socket->receive_buffer = NULL;
- socket->receive_buffer_size = 0;
-}
-
-
-/**
- * Callback to set state to RECEIVE_CLOSE_WAIT
- *
- * @param cls the closure from queue_message
- * @param socket the socket requiring state change
- */
-static void
-set_state_receive_close_wait (void *cls,
- struct GNUNET_STREAM_Socket *socket)
-{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Attaing RECEIVE_CLOSE_WAIT state\n",
- GNUNET_i2s (&socket->other_peer));
- socket->state = STATE_RECEIVE_CLOSE_WAIT;
- GNUNET_free_non_null (socket->receive_buffer); /* Free the receive buffer */
- socket->receive_buffer = NULL;
- socket->receive_buffer_size = 0;
-}
-
-
-/**
- * Callback to set state to TRANSMIT_CLOSE_WAIT
- *
- * @param cls the closure from queue_message
- * @param socket the socket requiring state change
- */
-static void
-set_state_transmit_close_wait (void *cls,
- struct GNUNET_STREAM_Socket *socket)
-{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Attaing TRANSMIT_CLOSE_WAIT state\n",
- GNUNET_i2s (&socket->other_peer));
- socket->state = STATE_TRANSMIT_CLOSE_WAIT;
-}
-
-
-/**
- * Callback to set state to CLOSED
- *
- * @param cls the closure from queue_message
- * @param socket the socket requiring state change
- */
-static void
-set_state_closed (void *cls,
- struct GNUNET_STREAM_Socket *socket)
-{
- socket->state = STATE_CLOSED;
-}
-
-
-/**
- * Returns GNUNET_MESSAGE_TYPE_STREAM_HELLO
- *
- * @return the generate hello message
- */
-static struct GNUNET_MessageHeader *
-generate_hello (struct GNUNET_STREAM_Socket *socket)
-{
- struct GNUNET_STREAM_HelloMessage *msg;
-
- msg = GNUNET_malloc (sizeof (struct GNUNET_STREAM_HelloMessage));
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_STREAM_HELLO);
- msg->header.size = htons (sizeof (struct GNUNET_STREAM_HelloMessage));
- msg->port = GNUNET_htonll ((uint64_t) socket->port);
- return &msg->header;
-}
-
-
-/**
- * Returns a new HelloAckMessage. Also sets the write sequence number for the
- * socket
- *
- * @param socket the socket for which this HelloAckMessage has to be generated
- * @param generate_seq GNUNET_YES to generate the write sequence number,
- * GNUNET_NO to use the existing sequence number
- * @return the HelloAckMessage
- */
-static struct GNUNET_STREAM_HelloAckMessage *
-generate_hello_ack (struct GNUNET_STREAM_Socket *socket,
- int generate_seq)
-{
- struct GNUNET_STREAM_HelloAckMessage *msg;
-
- if (GNUNET_YES == generate_seq)
- {
- if (GNUNET_YES == socket->testing_active)
- socket->write_sequence_number =
- socket->testing_set_write_sequence_number_value;
- else
- socket->write_sequence_number =
- GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE, UINT32_MAX);
- LOG_DEBUG ("%s: write sequence number %u\n",
- GNUNET_i2s (&socket->other_peer),
- (unsigned int) socket->write_sequence_number);
- }
- msg = GNUNET_malloc (sizeof (struct GNUNET_STREAM_HelloAckMessage));
- msg->header.size =
- htons (sizeof (struct GNUNET_STREAM_HelloAckMessage));
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_STREAM_HELLO_ACK);
- msg->sequence_number = htonl (socket->write_sequence_number);
- msg->receiver_window_size = htonl (RECEIVE_BUFFER_SIZE);
- return msg;
-}
-
-
-/**
- * Task for retransmitting control messages if they aren't ACK'ed before a
- * deadline
- *
- * @param cls the socket
- * @param tc the Task context
- */
-static void
-control_retransmission_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- socket->control_retransmission_task_id = GNUNET_SCHEDULER_NO_TASK;
- if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
- return;
- LOG_DEBUG ("%s: Retransmitting a control message\n",
- GNUNET_i2s (&socket->other_peer));
- switch (socket->state)
- {
- case STATE_INIT:
- GNUNET_break (0);
- break;
- case STATE_LISTEN:
- GNUNET_break (0);
- break;
- case STATE_HELLO_WAIT:
- if (NULL == socket->lsocket) /* We are client */
- queue_message (socket, generate_hello (socket), NULL, NULL, GNUNET_NO);
- else
- queue_message (socket,
- (struct GNUNET_MessageHeader *)
- generate_hello_ack (socket, GNUNET_NO), NULL, NULL,
- GNUNET_NO);
- socket->control_retransmission_task_id =
- GNUNET_SCHEDULER_add_delayed (socket->retransmit_timeout,
- &control_retransmission_task, socket);
- break;
- case STATE_ESTABLISHED:
- if (NULL == socket->lsocket)
- queue_message (socket,
- (struct GNUNET_MessageHeader *)
- generate_hello_ack (socket, GNUNET_NO), NULL, NULL,
- GNUNET_NO);
- else
- GNUNET_break (0);
- break;
- default:
- GNUNET_break (0);
- }
-}
-
-
-/**
- * Client's message handler for GNUNET_MESSAGE_TYPE_STREAM_HELLO_ACK
- *
- * @param cls the socket (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end
- * @param tunnel_ctx this is NULL
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_hello_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
- const struct GNUNET_STREAM_HelloAckMessage *ack_msg;
- struct GNUNET_STREAM_HelloAckMessage *reply;
-
- ack_msg = (const struct GNUNET_STREAM_HelloAckMessage *) message;
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Received HELLO_ACK from %s\n",
- GNUNET_i2s (&socket->other_peer), GNUNET_i2s (&socket->other_peer));
- GNUNET_assert (socket->tunnel == tunnel);
- switch (socket->state)
- {
- case STATE_HELLO_WAIT:
- socket->read_sequence_number = ntohl (ack_msg->sequence_number);
- LOG_DEBUG ("%s: Read sequence number %u\n",
- GNUNET_i2s (&socket->other_peer), socket->read_sequence_number);
- socket->receiver_window_available = ntohl (ack_msg->receiver_window_size);
- reply = generate_hello_ack (socket, GNUNET_YES);
- queue_message (socket, &reply->header, &set_state_established,
- NULL, GNUNET_NO);
- return GNUNET_OK;
- case STATE_ESTABLISHED:
- // call statistics (# ACKs ignored++)
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK ==
- socket->control_retransmission_task_id);
- socket->control_retransmission_task_id =
- GNUNET_SCHEDULER_add_now (&control_retransmission_task, socket);
- return GNUNET_OK;
- default:
- LOG_DEBUG ("%1$s: Server %1$s sent HELLO_ACK when in state %2$d\n",
- GNUNET_i2s (&socket->other_peer), socket->state);
- socket->state = STATE_CLOSED; // introduce STATE_ERROR?
- return GNUNET_SYSERR;
- }
-}
-
-
-/**
- * Client's message handler for GNUNET_MESSAGE_TYPE_STREAM_RESET
- *
- * @param cls the socket (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end
- * @param tunnel_ctx this is NULL
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_reset (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- // struct GNUNET_STREAM_Socket *socket = cls;
-
- return GNUNET_OK;
-}
-
-
-/**
- * Frees the socket's receive buffers, marks the socket as receive closed and
- * calls the DataProcessor with GNUNET_STREAM_SHUTDOWN status if a read handle
- * is present
- *
- * @param socket the socket
- */
-static void
-do_receive_shutdown (struct GNUNET_STREAM_Socket *socket)
-{
- socket->receive_closed = GNUNET_YES;
- GNUNET_free_non_null (socket->receive_buffer); /* Free the receive buffer */
- socket->receive_buffer = NULL;
- socket->receive_buffer_size = 0;
- if (NULL != socket->read_handle)
- {
- GNUNET_STREAM_DataProcessor proc;
- void *proc_cls;
-
- proc = socket->read_handle->proc;
- proc_cls = socket->read_handle->proc_cls;
- GNUNET_STREAM_read_cancel (socket->read_handle);
- socket->read_handle = NULL;
- if (NULL != proc)
- proc (proc_cls, GNUNET_STREAM_SHUTDOWN, NULL, 0);
- }
-}
-
-
-/**
- * Marks the socket as transmit closed and calls the CompletionContinuation with
- * GNUNET_STREAM_SHUTDOWN status if a write handle is present
- *
- * @param socket the socket
- */
-static void
-do_transmit_shutdown (struct GNUNET_STREAM_Socket *socket)
-{
- socket->transmit_closed = GNUNET_YES;
- /* If write handle is present call it with GNUNET_STREAM_SHUTDOWN to signal
- that that stream has been shutdown */
- if (NULL != socket->write_handle)
- {
- GNUNET_STREAM_CompletionContinuation wc;
- void *wc_cls;
-
- wc = socket->write_handle->write_cont;
- wc_cls = socket->write_handle->write_cont_cls;
- GNUNET_STREAM_write_cancel (socket->write_handle);
- socket->write_handle = NULL;
- if (NULL != wc)
- wc (wc_cls,
- GNUNET_STREAM_SHUTDOWN, 0);
- }
-}
-
-
-/**
- * Common message handler for handling TRANSMIT_CLOSE messages
- *
- * @param socket the socket through which the ack was received
- * @param tunnel connection to the other end
- * @param msg the transmit close message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_transmit_close (struct GNUNET_STREAM_Socket *socket,
- struct GNUNET_MESH_Tunnel *tunnel,
- const struct GNUNET_MessageHeader *msg)
-{
- struct GNUNET_MessageHeader *reply;
-
- switch (socket->state)
- {
- case STATE_INIT:
- case STATE_LISTEN:
- case STATE_HELLO_WAIT:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Ignoring RECEIVE_CLOSE as it cannot be handled now\n",
- GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- default:
- break;
- }
- /* Send TRANSMIT_CLOSE_ACK */
- reply = GNUNET_malloc (sizeof (struct GNUNET_MessageHeader));
- reply->type = htons (GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE_ACK);
- reply->size = htons (sizeof (struct GNUNET_MessageHeader));
- queue_message (socket, reply, NULL, NULL, GNUNET_NO);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%1$s: Received TRANSMIT_CLOSE from %1$s\n",
- GNUNET_i2s (&socket->other_peer));
- switch(socket->state)
- {
- case STATE_RECEIVE_CLOSED:
- case STATE_RECEIVE_CLOSE_WAIT:
- case STATE_CLOSE_WAIT:
- case STATE_CLOSED:
- return GNUNET_OK;
- default:
- break;
- }
- do_receive_shutdown (socket);
- if (GNUNET_YES == socket->transmit_closed)
- socket->state = STATE_CLOSED;
- else
- socket->state = STATE_RECEIVE_CLOSED;
- return GNUNET_OK;
-}
-
-
-/**
- * Client's message handler for GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE
- *
- * @param cls the socket (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end
- * @param tunnel_ctx this is NULL
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_transmit_close (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- return handle_transmit_close (socket,
- tunnel,
- (struct GNUNET_MessageHeader *)message);
-}
-
-
-/**
- * Task for calling the shutdown continuation callback
- *
- * @param cls the socket
- * @param tc the scheduler task context
- */
-static void
-call_cont_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- GNUNET_assert (NULL != socket->shutdown_handle);
- socket->shutdown_handle->call_cont_task_id = GNUNET_SCHEDULER_NO_TASK;
- if (NULL != socket->shutdown_handle->completion_cb)
- socket->shutdown_handle->completion_cb
- (socket->shutdown_handle->completion_cls,
- socket->shutdown_handle->operation);
- GNUNET_free (socket->shutdown_handle);
- socket->shutdown_handle = NULL;
-}
-
-
-/**
- * Generic handler for GNUNET_MESSAGE_TYPE_STREAM_*_CLOSE_ACK messages
- *
- * @param socket the socket
- * @param tunnel connection to the other end
- * @param message the actual message
- * @param operation the close operation which is being ACK'ed
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_generic_close_ack (struct GNUNET_STREAM_Socket *socket,
- struct GNUNET_MESH_Tunnel *tunnel,
- const struct GNUNET_MessageHeader *message,
- int operation)
-{
- struct GNUNET_STREAM_ShutdownHandle *shutdown_handle;
-
- shutdown_handle = socket->shutdown_handle;
- if (NULL == shutdown_handle)
- {
- /* This may happen when the shudown handle is cancelled */
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received CLOSE_ACK when shutdown handle is NULL\n",
- GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- }
- switch (operation)
- {
- case SHUT_RDWR:
- switch (socket->state)
- {
- case STATE_CLOSE_WAIT:
- if (SHUT_RDWR != shutdown_handle->operation)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received CLOSE_ACK when shutdown handle is not for "
- "SHUT_RDWR\n", GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Received CLOSE_ACK from %s\n",
- GNUNET_i2s (&socket->other_peer), GNUNET_i2s (&socket->other_peer));
- socket->state = STATE_CLOSED;
- break;
- default:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received CLOSE_ACK when it is not expected\n",
- GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- }
- break;
- case SHUT_RD:
- switch (socket->state)
- {
- case STATE_RECEIVE_CLOSE_WAIT:
- if (SHUT_RD != shutdown_handle->operation)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received RECEIVE_CLOSE_ACK when shutdown handle "
- "is not for SHUT_RD\n", GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Received RECEIVE_CLOSE_ACK from %s\n",
- GNUNET_i2s (&socket->other_peer), GNUNET_i2s (&socket->other_peer));
- socket->state = STATE_RECEIVE_CLOSED;
- break;
- default:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received RECEIVE_CLOSE_ACK when it is not expected\n",
- GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- }
- break;
- case SHUT_WR:
- switch (socket->state)
- {
- case STATE_TRANSMIT_CLOSE_WAIT:
- if (SHUT_WR != shutdown_handle->operation)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received TRANSMIT_CLOSE_ACK when shutdown handle "
- "is not for SHUT_WR\n",
- GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Received TRANSMIT_CLOSE_ACK from %s\n",
- GNUNET_i2s (&socket->other_peer), GNUNET_i2s (&socket->other_peer));
- socket->state = STATE_TRANSMIT_CLOSED;
- break;
- default:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received TRANSMIT_CLOSE_ACK when it is not expected\n",
- GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- }
- break;
- default:
- GNUNET_assert (0);
- }
- shutdown_handle->call_cont_task_id = GNUNET_SCHEDULER_add_now
- (&call_cont_task, socket);
- if (GNUNET_SCHEDULER_NO_TASK
- != shutdown_handle->close_msg_retransmission_task_id)
- {
- GNUNET_SCHEDULER_cancel
- (shutdown_handle->close_msg_retransmission_task_id);
- shutdown_handle->close_msg_retransmission_task_id =
- GNUNET_SCHEDULER_NO_TASK;
- }
- return GNUNET_OK;
-}
-
-
-/**
- * Client's message handler for GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE_ACK
- *
- * @param cls the socket (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end
- * @param tunnel_ctx this is NULL
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_transmit_close_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- return handle_generic_close_ack (socket,
- tunnel,
- (const struct GNUNET_MessageHeader *)
- message,
- SHUT_WR);
-}
-
-
-/**
- * Generic handler for GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE
- *
- * @param socket the socket
- * @param tunnel connection to the other end
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_receive_close (struct GNUNET_STREAM_Socket *socket,
- struct GNUNET_MESH_Tunnel *tunnel,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MessageHeader *receive_close_ack;
-
- switch (socket->state)
- {
- case STATE_INIT:
- case STATE_LISTEN:
- case STATE_HELLO_WAIT:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Ignoring RECEIVE_CLOSE as it cannot be handled now\n",
- GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- default:
- break;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Received RECEIVE_CLOSE from %s\n",
- GNUNET_i2s (&socket->other_peer), GNUNET_i2s (&socket->other_peer));
- receive_close_ack = GNUNET_malloc (sizeof (struct GNUNET_MessageHeader));
- receive_close_ack->size = htons (sizeof (struct GNUNET_MessageHeader));
- receive_close_ack->type =
- htons (GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE_ACK);
- queue_message (socket, receive_close_ack, NULL, NULL, GNUNET_NO);
- switch (socket->state)
- {
- case STATE_TRANSMIT_CLOSED:
- case STATE_TRANSMIT_CLOSE_WAIT:
- case STATE_CLOSED:
- case STATE_CLOSE_WAIT:
- return GNUNET_OK;
- default:
- break;
- }
- do_transmit_shutdown (socket);
- if (GNUNET_YES == socket->receive_closed)
- socket->state = STATE_CLOSED;
- else
- socket->state = STATE_TRANSMIT_CLOSED;
- return GNUNET_OK;
-}
-
-
-/**
- * Client's message handler for GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE
- *
- * @param cls the socket (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end
- * @param tunnel_ctx this is NULL
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_receive_close (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- return
- handle_receive_close (socket,
- tunnel,
- (const struct GNUNET_MessageHeader *) message);
-}
-
-
-/**
- * Client's message handler for GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE_ACK
- *
- * @param cls the socket (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end
- * @param tunnel_ctx this is NULL
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_receive_close_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- return handle_generic_close_ack (socket,
- tunnel,
- (const struct GNUNET_MessageHeader *)
- message,
- SHUT_RD);
-}
-
-
-/**
- * Generic handler for GNUNET_MESSAGE_TYPE_STREAM_CLOSE
- *
- * @param socket the socket
- * @param tunnel connection to the other end
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_close (struct GNUNET_STREAM_Socket *socket,
- struct GNUNET_MESH_Tunnel *tunnel,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MessageHeader *close_ack;
-
- switch (socket->state)
- {
- case STATE_INIT:
- case STATE_LISTEN:
- case STATE_HELLO_WAIT:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Ignoring RECEIVE_CLOSE as it cannot be handled now\n",
- GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- default:
- break;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Received CLOSE from %s\n",
- GNUNET_i2s (&socket->other_peer), GNUNET_i2s (&socket->other_peer));
- close_ack = GNUNET_malloc (sizeof (struct GNUNET_MessageHeader));
- close_ack->size = htons (sizeof (struct GNUNET_MessageHeader));
- close_ack->type = htons (GNUNET_MESSAGE_TYPE_STREAM_CLOSE_ACK);
- queue_message (socket, close_ack, &set_state_closed, NULL, GNUNET_NO);
- if ((STATE_CLOSED == socket->state) || (STATE_CLOSE_WAIT == socket->state))
- return GNUNET_OK;
- if (GNUNET_NO == socket->transmit_closed)
- do_transmit_shutdown (socket);
- if (GNUNET_NO == socket->receive_closed)
- do_receive_shutdown (socket);
- return GNUNET_OK;
-}
-
-
-/**
- * Client's message handler for GNUNET_MESSAGE_TYPE_STREAM_CLOSE
- *
- * @param cls the socket (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end
- * @param tunnel_ctx this is NULL
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_close (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- return handle_close (socket,
- tunnel,
- (const struct GNUNET_MessageHeader *) message);
-}
-
-
-/**
- * Client's message handler for GNUNET_MESSAGE_TYPE_STREAM_CLOSE_ACK
- *
- * @param cls the socket (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end
- * @param tunnel_ctx this is NULL
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_close_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- return handle_generic_close_ack (socket,
- tunnel,
- (const struct GNUNET_MessageHeader *)
- message,
- SHUT_RDWR);
-}
-
-/*****************************/
-/* Server's Message Handlers */
-/*****************************/
-
-/**
- * Server's message Handler for GNUNET_MESSAGE_TYPE_STREAM_DATA
- *
- * @param cls the closure
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_data (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
-
- return handle_data (socket,
- tunnel,
- (const struct GNUNET_STREAM_DataMessage *)message);
-}
-
-
-/**
- * Server's message handler for GNUNET_MESSAGE_TYPE_STREAM_HELLO
- *
- * @param cls the closure
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_hello (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
- const struct GNUNET_STREAM_HelloMessage *hello;
- struct GNUNET_STREAM_HelloAckMessage *reply;
- uint32_t port;
-
- hello = (const struct GNUNET_STREAM_HelloMessage *) message;
- GNUNET_assert (GNUNET_MESSAGE_TYPE_STREAM_HELLO == ntohs (message->type));
- GNUNET_assert (socket->tunnel == tunnel);
- LOG_DEBUG ("%1$s: Received HELLO from %1$s\n",
- GNUNET_i2s (&socket->other_peer));
- port = (uint32_t) GNUNET_ntohll (hello->port);
- switch (socket->state)
- {
- case STATE_INIT:
- if (port != socket->port)
- {
- LOG_DEBUG ("Ignoring HELLO for port %u\n", port);
- GNUNET_MESH_tunnel_destroy (tunnel);
- GNUNET_free (socket);
- return GNUNET_OK;
- }
- reply = generate_hello_ack (socket, GNUNET_YES);
- queue_message (socket, &reply->header, &set_state_hello_wait, NULL,
- GNUNET_NO);
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK ==
- socket->control_retransmission_task_id);
- socket->control_retransmission_task_id =
- GNUNET_SCHEDULER_add_delayed (socket->retransmit_timeout,
- &control_retransmission_task, socket);
- break;
- case STATE_HELLO_WAIT:
- /* Perhaps our HELLO_ACK was lost */
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK !=
- socket->control_retransmission_task_id);
- GNUNET_SCHEDULER_cancel (socket->control_retransmission_task_id);
- socket->control_retransmission_task_id =
- GNUNET_SCHEDULER_add_now (&control_retransmission_task, socket);
- break;
- default:
- LOG_DEBUG( "%s: Client sent HELLO when in state %d\n",
- GNUNET_i2s (&socket->other_peer), socket->state);
- /* FIXME: Send RESET? */
- }
- return GNUNET_OK;
-}
-
-
-/**
- * Server's message handler for GNUNET_MESSAGE_TYPE_STREAM_HELLO_ACK
- *
- * @param cls the closure
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_hello_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
- const struct GNUNET_STREAM_HelloAckMessage *ack_message;
-
- GNUNET_assert (GNUNET_MESSAGE_TYPE_STREAM_HELLO_ACK ==
- ntohs (message->type));
- GNUNET_assert (socket->tunnel == tunnel);
- ack_message = (struct GNUNET_STREAM_HelloAckMessage *) message;
- switch (socket->state)
- {
- case STATE_HELLO_WAIT:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received HELLO_ACK from %s\n",
- GNUNET_i2s (&socket->other_peer),
- GNUNET_i2s (&socket->other_peer));
- socket->read_sequence_number = ntohl (ack_message->sequence_number);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Read sequence number %u\n",
- GNUNET_i2s (&socket->other_peer),
- (unsigned int) socket->read_sequence_number);
- socket->receiver_window_available =
- ntohl (ack_message->receiver_window_size);
- set_state_established (NULL, socket);
- break;
- default:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Client sent HELLO_ACK when in state %d\n", socket->state);
- }
- return GNUNET_OK;
-}
-
-
-/**
- * Server's message handler for GNUNET_MESSAGE_TYPE_STREAM_RESET
- *
- * @param cls the closure
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_reset (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- // struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
- /* FIXME */
- return GNUNET_OK;
-}
-
-
-/**
- * Server's message handler for GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE
- *
- * @param cls the closure
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_transmit_close (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
-
- return handle_transmit_close (socket, tunnel, message);
-}
-
-
-/**
- * Server's message handler for GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE_ACK
- *
- * @param cls the closure
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_transmit_close_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
-
- return handle_generic_close_ack (socket, tunnel, message, SHUT_WR);
-}
-
-
-/**
- * Server's message handler for GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE
- *
- * @param cls the closure
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_receive_close (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
-
- return handle_receive_close (socket, tunnel, message);
-}
-
-
-/**
- * Server's message handler for GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE_ACK
- *
- * @param cls the closure
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_receive_close_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
-
- return handle_generic_close_ack (socket, tunnel, message, SHUT_RD);
-}
-
-
-/**
- * Server's message handler for GNUNET_MESSAGE_TYPE_STREAM_CLOSE
- *
- * @param cls the listen socket (from GNUNET_MESH_connect in
- * GNUNET_STREAM_listen)
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_close (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
-
- return handle_close (socket, tunnel, message);
-}
-
-
-/**
- * Server's message handler for GNUNET_MESSAGE_TYPE_STREAM_CLOSE_ACK
- *
- * @param cls the closure
- * @param tunnel connection to the other end
- * @param tunnel_ctx the socket
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_close_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
-
- return handle_generic_close_ack (socket, tunnel, message, SHUT_RDWR);
-}
-
-
-/**
- * Handler for DATA_ACK messages
- *
- * @param socket the socket through which the ack was received
- * @param tunnel connection to the other end
- * @param ack the acknowledgment message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-handle_ack (struct GNUNET_STREAM_Socket *socket,
- struct GNUNET_MESH_Tunnel *tunnel,
- const struct GNUNET_STREAM_AckMessage *ack)
-{
- struct GNUNET_STREAM_WriteHandle *write_handle;
- uint64_t ack_bitmap;
- unsigned int packet;
- int need_retransmission;
- uint32_t sequence_difference;
-
- switch (socket->state)
- {
- case (STATE_ESTABLISHED):
- case (STATE_RECEIVE_CLOSED):
- case (STATE_RECEIVE_CLOSE_WAIT):
- if (NULL == socket->write_handle)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received DATA_ACK when write_handle is NULL\n",
- GNUNET_i2s (&socket->other_peer));
- return GNUNET_OK;
- }
- sequence_difference =
- socket->write_sequence_number - ntohl (ack->base_sequence_number);
- if (!(sequence_difference <= GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received DATA_ACK with unexpected base sequence number\n",
- GNUNET_i2s (&socket->other_peer));
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Current write sequence: %u; Ack's base sequence: %u\n",
- GNUNET_i2s (&socket->other_peer),
- socket->write_sequence_number,
- ntohl (ack->base_sequence_number));
- return GNUNET_OK;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: Received DATA_ACK from %s\n",
- GNUNET_i2s (&socket->other_peer), GNUNET_i2s (&socket->other_peer));
- /* Cancel the retransmission task */
- if (GNUNET_SCHEDULER_NO_TASK != socket->data_retransmission_task_id)
- {
- GNUNET_SCHEDULER_cancel (socket->data_retransmission_task_id);
- socket->data_retransmission_task_id = GNUNET_SCHEDULER_NO_TASK;
- socket->data_retransmit_timeout = GNUNET_TIME_UNIT_SECONDS;
- }
- for (packet=0; packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH; packet++)
- {
- if (NULL == socket->write_handle->messages[packet])
- break;
- /* BS: Base sequence from ack; PS: sequence num of current packet */
- sequence_difference = ntohl (ack->base_sequence_number)
- - ntohl (socket->write_handle->messages[packet]->sequence_number);
- if (0 == sequence_difference)
- break; /* The message in our handle is not yet received */
- /* case where BS = PS + GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH */
- /* sequence_difference <= GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH */
- ackbitmap_modify_bit (&socket->write_handle->ack_bitmap,
- packet, GNUNET_YES);
- }
- if (((ntohl (ack->base_sequence_number)
- - (socket->write_handle->max_ack_base_num))
- <= GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH))
- {
- socket->write_handle->max_ack_base_num = ntohl (ack->base_sequence_number);
- socket->receiver_window_available =
- ntohl (ack->receive_window_remaining);
- }
- else
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Ignoring to modify receive window available as base: %u, max_ack_base: %u\n",
- ntohl (ack->base_sequence_number),
- socket->write_handle->max_ack_base_num);
- if ((packet == GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH)
- || ((packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH)
- && (NULL == socket->write_handle->messages[packet])))
- goto call_write_cont_cb;
- GNUNET_assert (ntohl
- (socket->write_handle->messages[packet]->sequence_number)
- == ntohl (ack->base_sequence_number));
- /* Update our bitmap */
- ack_bitmap = GNUNET_ntohll (ack->bitmap);
- for (; packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH; packet++)
- {
- if (NULL == socket->write_handle->messages[packet]) break;
- if (ackbitmap_is_bit_set (&ack_bitmap, ntohl
- (socket->write_handle->messages[packet]->sequence_number)
- - ntohl (ack->base_sequence_number)))
- ackbitmap_modify_bit (&socket->write_handle->ack_bitmap, packet, GNUNET_YES);
- }
- /* Check if we have received all acknowledgements */
- need_retransmission = GNUNET_NO;
- for (packet=0; packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH; packet++)
- {
- if (NULL == socket->write_handle->messages[packet]) break;
- if (GNUNET_YES != ackbitmap_is_bit_set
- (&socket->write_handle->ack_bitmap,packet))
- {
- need_retransmission = GNUNET_YES;
- break;
- }
- }
- if (GNUNET_YES == need_retransmission)
- {
- write_data (socket);
- return GNUNET_OK;
- }
-
- call_write_cont_cb:
- /* Free the packets */
- for (packet=0; packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH; packet++)
- {
- GNUNET_free_non_null (socket->write_handle->messages[packet]);
- }
- write_handle = socket->write_handle;
- socket->write_handle = NULL;
- if (NULL != write_handle->write_cont)
- write_handle->write_cont (write_handle->write_cont_cls,
- GNUNET_STREAM_OK,
- write_handle->size);
- /* We are done with the write handle - Freeing it */
- GNUNET_free (write_handle);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Write completion callback completed\n",
- GNUNET_i2s (&socket->other_peer));
- break;
- default:
- break;
- }
- return GNUNET_OK;
-}
-
-
-/**
- * Handler for DATA_ACK messages
- *
- * @param cls the 'struct GNUNET_STREAM_Socket'
- * @param tunnel connection to the other end
- * @param tunnel_ctx unused
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-client_handle_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
- const struct GNUNET_STREAM_AckMessage *ack;
-
- ack = (const struct GNUNET_STREAM_AckMessage *) message;
- return handle_ack (socket, tunnel, ack);
-}
-
-
-/**
- * Handler for DATA_ACK messages
- *
- * @param cls the server's listen socket
- * @param tunnel connection to the other end
- * @param tunnel_ctx pointer to the 'struct GNUNET_STREAM_Socket*'
- * @param message the actual message
- * @return GNUNET_OK to keep the connection open,
- * GNUNET_SYSERR to close it (signal serious error)
- */
-static int
-server_handle_ack (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- void **tunnel_ctx,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_STREAM_Socket *socket = *tunnel_ctx;
- const struct GNUNET_STREAM_AckMessage *ack = (const struct GNUNET_STREAM_AckMessage *) message;
-
- return handle_ack (socket, tunnel, ack);
-}
-
-
-/**
- * For client message handlers, the stream socket is in the
- * closure argument.
- */
-static struct GNUNET_MESH_MessageHandler client_message_handlers[] = {
- {&client_handle_data, GNUNET_MESSAGE_TYPE_STREAM_DATA, 0},
- {&client_handle_ack, GNUNET_MESSAGE_TYPE_STREAM_ACK,
- sizeof (struct GNUNET_STREAM_AckMessage) },
- {&client_handle_hello_ack, GNUNET_MESSAGE_TYPE_STREAM_HELLO_ACK,
- sizeof (struct GNUNET_STREAM_HelloAckMessage)},
- {&client_handle_reset, GNUNET_MESSAGE_TYPE_STREAM_RESET,
- sizeof (struct GNUNET_MessageHeader)},
- {&client_handle_transmit_close, GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE,
- sizeof (struct GNUNET_MessageHeader)},
- {&client_handle_transmit_close_ack, GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE_ACK,
- sizeof (struct GNUNET_MessageHeader)},
- {&client_handle_receive_close, GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE,
- sizeof (struct GNUNET_MessageHeader)},
- {&client_handle_receive_close_ack, GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE_ACK,
- sizeof (struct GNUNET_MessageHeader)},
- {&client_handle_close, GNUNET_MESSAGE_TYPE_STREAM_CLOSE,
- sizeof (struct GNUNET_MessageHeader)},
- {&client_handle_close_ack, GNUNET_MESSAGE_TYPE_STREAM_CLOSE_ACK,
- sizeof (struct GNUNET_MessageHeader)},
- {NULL, 0, 0}
-};
-
-
-/**
- * For server message handlers, the stream socket is in the
- * tunnel context, and the listen socket in the closure argument.
- */
-static struct GNUNET_MESH_MessageHandler server_message_handlers[] = {
- {&server_handle_data, GNUNET_MESSAGE_TYPE_STREAM_DATA, 0},
- {&server_handle_ack, GNUNET_MESSAGE_TYPE_STREAM_ACK,
- sizeof (struct GNUNET_STREAM_AckMessage) },
- {&server_handle_hello, GNUNET_MESSAGE_TYPE_STREAM_HELLO,
- sizeof (struct GNUNET_STREAM_HelloMessage)},
- {&server_handle_hello_ack, GNUNET_MESSAGE_TYPE_STREAM_HELLO_ACK,
- sizeof (struct GNUNET_STREAM_HelloAckMessage)},
- {&server_handle_reset, GNUNET_MESSAGE_TYPE_STREAM_RESET,
- sizeof (struct GNUNET_MessageHeader)},
- {&server_handle_transmit_close, GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE,
- sizeof (struct GNUNET_MessageHeader)},
- {&server_handle_transmit_close_ack, GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE_ACK,
- sizeof (struct GNUNET_MessageHeader)},
- {&server_handle_receive_close, GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE,
- sizeof (struct GNUNET_MessageHeader)},
- {&server_handle_receive_close_ack, GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE_ACK,
- sizeof (struct GNUNET_MessageHeader)},
- {&server_handle_close, GNUNET_MESSAGE_TYPE_STREAM_CLOSE,
- sizeof (struct GNUNET_MessageHeader)},
- {&server_handle_close_ack, GNUNET_MESSAGE_TYPE_STREAM_CLOSE_ACK,
- sizeof (struct GNUNET_MessageHeader)},
- {NULL, 0, 0}
-};
-
-
-/**
- * Function called when our target peer is connected to our tunnel
- *
- * @param cls the socket for which this tunnel is created
- * @param peer the peer identity of the target
- * @param atsi performance data for the connection
- *
- * FIXME static
- */
-void
-mesh_peer_connect_callback (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_ATS_Information * atsi)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
- struct GNUNET_MessageHeader *message;
-
- if (0 != memcmp (peer,
- &socket->other_peer,
- sizeof (struct GNUNET_PeerIdentity)))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: A peer which is not our target has connected to our tunnel\n",
- GNUNET_i2s(peer));
- return;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Target peer %s connected\n",
- GNUNET_i2s (&socket->other_peer),
- GNUNET_i2s (&socket->other_peer));
- /* Set state to INIT */
- socket->state = STATE_INIT;
- /* Send HELLO message */
- message = generate_hello (socket);
- queue_message (socket, message, &set_state_hello_wait, NULL, GNUNET_NO);
- if (GNUNET_SCHEDULER_NO_TASK != socket->control_retransmission_task_id)
- GNUNET_SCHEDULER_cancel (socket->control_retransmission_task_id);
- socket->control_retransmission_task_id =
- GNUNET_SCHEDULER_add_delayed (socket->retransmit_timeout,
- &control_retransmission_task, socket);
-}
-
-
-/**
- * Function called when our target peer is disconnected from our tunnel
- *
- * @param cls the socket associated which this tunnel
- * @param peer the peer identity of the target
- *
- * FIXME static
- */
-void
-mesh_peer_disconnect_callback (void *cls,
- const struct GNUNET_PeerIdentity *peer)
-{
- struct GNUNET_STREAM_Socket *socket=cls;
-
- /* If the state is SHUTDOWN its ok; else set the state of the socket to SYSERR */
- LOG_DEBUG ("%1$s: Other peer %1$s disconnected \n",
- GNUNET_i2s (&socket->other_peer));
-}
-
-
-/**
- * Method called whenever a peer creates a tunnel to us
- *
- * @param cls closure
- * @param tunnel new handle to the tunnel
- * @param initiator peer that started the tunnel
- * @param port incoming port
- * @return initial tunnel context for the tunnel
- * (can be NULL -- that's not an error)
- */
-static void *
-new_tunnel_notify (void *cls,
- struct GNUNET_MESH_Tunnel *tunnel,
- const struct GNUNET_PeerIdentity *initiator,
- uint32_t port)
-{
- struct GNUNET_STREAM_ListenSocket *lsocket = cls;
- struct GNUNET_STREAM_Socket *socket;
-
- /* FIXME: If a tunnel is already created, we should not accept new tunnels
- from the same peer again until the socket is closed */
- if (GNUNET_NO == lsocket->listening)
- {
- GNUNET_MESH_tunnel_destroy (tunnel);
- return NULL;
- }
- socket = GNUNET_malloc (sizeof (struct GNUNET_STREAM_Socket));
- socket->other_peer = *initiator;
- socket->tunnel = tunnel;
- socket->state = STATE_INIT;
- socket->lsocket = lsocket;
- socket->port = lsocket->port;
- socket->stat_handle = lsocket->stat_handle;
- socket->retransmit_timeout = lsocket->retransmit_timeout;
- socket->testing_active = lsocket->testing_active;
- socket->testing_set_write_sequence_number_value =
- lsocket->testing_set_write_sequence_number_value;
- socket->max_payload_size = lsocket->max_payload_size;
- LOG_DEBUG ("%1$s: Peer %1$s initiated tunnel to us\n",
- GNUNET_i2s (&socket->other_peer));
- if (NULL != socket->stat_handle)
- {
- GNUNET_STATISTICS_update (socket->stat_handle,
- "total inbound connections received",
- 1, GNUNET_NO);
- GNUNET_STATISTICS_update (socket->stat_handle,
- "inbound connections", 1, GNUNET_NO);
- }
- return socket;
-}
-
-
-/**
- * Function called whenever an inbound tunnel is destroyed. Should clean up
- * any associated state. This function is NOT called if the client has
- * explicitly asked for the tunnel to be destroyed using
- * GNUNET_MESH_tunnel_destroy. It must NOT call GNUNET_MESH_tunnel_destroy on
- * the tunnel.
- *
- * @param cls closure (set from GNUNET_MESH_connect)
- * @param tunnel connection to the other end (henceforth invalid)
- * @param tunnel_ctx place where local state associated
- * with the tunnel is stored
- */
-static void
-tunnel_cleaner (void *cls,
- const struct GNUNET_MESH_Tunnel *tunnel,
- void *tunnel_ctx)
-{
- struct GNUNET_STREAM_Socket *socket = tunnel_ctx;
- struct MessageQueue *head;
-
- GNUNET_assert (tunnel == socket->tunnel);
- GNUNET_break_op(0);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Peer %s has terminated connection abruptly\n",
- GNUNET_i2s (&socket->other_peer),
- GNUNET_i2s (&socket->other_peer));
- if (NULL != socket->stat_handle)
- {
- GNUNET_STATISTICS_update (socket->stat_handle,
- "connections terminated abruptly", 1, GNUNET_NO);
- GNUNET_STATISTICS_update (socket->stat_handle,
- "inbound connections", -1, GNUNET_NO);
- }
- /* Clear Transmit handles */
- if (NULL != socket->transmit_handle)
- {
- GNUNET_MESH_notify_transmit_ready_cancel (socket->transmit_handle);
- socket->transmit_handle = NULL;
- }
- /* Stop Tasks using socket->tunnel */
- if (GNUNET_SCHEDULER_NO_TASK != socket->ack_task_id)
- {
- GNUNET_SCHEDULER_cancel (socket->ack_task_id);
- socket->ack_task_id = GNUNET_SCHEDULER_NO_TASK;
- }
- if (GNUNET_SCHEDULER_NO_TASK != socket->data_retransmission_task_id)
- {
- GNUNET_SCHEDULER_cancel (socket->data_retransmission_task_id);
- socket->data_retransmission_task_id = GNUNET_SCHEDULER_NO_TASK;
- }
- /* Terminate the control retransmission tasks */
- if (GNUNET_SCHEDULER_NO_TASK != socket->control_retransmission_task_id)
- {
- GNUNET_SCHEDULER_cancel (socket->control_retransmission_task_id);
- socket->control_retransmission_task_id = GNUNET_SCHEDULER_NO_TASK;
- }
- /* Clear existing message queue */
- while (NULL != (head = socket->queue_head)) {
- GNUNET_CONTAINER_DLL_remove (socket->queue_head,
- socket->queue_tail,
- head);
- GNUNET_free (head->message);
- GNUNET_free (head);
- }
- socket->tunnel = NULL;
-}
-
-
-/**
- * Callback to signal timeout on lockmanager lock acquire
- *
- * @param cls the ListenSocket
- * @param tc the scheduler task context
- */
-static void
-lockmanager_acquire_timeout (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_STREAM_ListenSocket *lsocket = cls;
- GNUNET_STREAM_ListenCallback listen_cb;
- void *listen_cb_cls;
-
- lsocket->lockmanager_acquire_timeout_task = GNUNET_SCHEDULER_NO_TASK;
- listen_cb = lsocket->listen_cb;
- listen_cb_cls = lsocket->listen_cb_cls;
- if (NULL != listen_cb)
- listen_cb (listen_cb_cls, NULL, NULL);
-}
-
-
-/**
- * Callback to notify us on the status changes on app_port lock
- *
- * @param cls the ListenSocket
- * @param domain the domain name of the lock
- * @param lock the app_port
- * @param status the current status of the lock
- */
-static void
-lock_status_change_cb (void *cls, const char *domain, uint32_t lock,
- enum GNUNET_LOCKMANAGER_Status status)
-{
- struct GNUNET_STREAM_ListenSocket *lsocket = cls;
-
- GNUNET_assert (lock == (uint32_t) lsocket->port);
- if (GNUNET_LOCKMANAGER_SUCCESS == status)
- {
- lsocket->listening = GNUNET_YES;
- if (GNUNET_SCHEDULER_NO_TASK != lsocket->lockmanager_acquire_timeout_task)
- {
- GNUNET_SCHEDULER_cancel (lsocket->lockmanager_acquire_timeout_task);
- lsocket->lockmanager_acquire_timeout_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (NULL == lsocket->mesh)
- {
- uint32_t ports[] = {lsocket->port, 0};
-
- lsocket->mesh = GNUNET_MESH_connect (lsocket->cfg,
- lsocket, /* Closure */
- &new_tunnel_notify,
- &tunnel_cleaner,
- server_message_handlers,
- ports);
- GNUNET_assert (NULL != lsocket->mesh);
- if (NULL != lsocket->listen_ok_cb)
- {
- (void) lsocket->listen_ok_cb ();
- }
- }
- }
- if (GNUNET_LOCKMANAGER_RELEASE == status)
- lsocket->listening = GNUNET_NO;
-}
-
-
-/*****************/
-/* API functions */
-/*****************/
-
-
-/**
- * Tries to open a stream to the target peer
- *
- * @param cfg configuration to use
- * @param target the target peer to which the stream has to be opened
- * @param app_port the application port number which uniquely identifies this
- * stream
- * @param open_cb this function will be called after stream has be established;
- * cannot be NULL
- * @param open_cb_cls the closure for open_cb
- * @param ... options to the stream, terminated by GNUNET_STREAM_OPTION_END
- * @return if successful it returns the stream socket; NULL if stream cannot be
- * opened
- */
-struct GNUNET_STREAM_Socket *
-GNUNET_STREAM_open (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const struct GNUNET_PeerIdentity *target,
- uint32_t app_port,
- GNUNET_STREAM_OpenCallback open_cb,
- void *open_cb_cls,
- ...)
-{
- struct GNUNET_STREAM_Socket *socket;
- enum GNUNET_STREAM_Option option;
- va_list vargs;
- uint16_t payload_size;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s\n", __func__);
- GNUNET_assert (NULL != open_cb);
- socket = GNUNET_malloc (sizeof (struct GNUNET_STREAM_Socket));
- socket->other_peer = *target;
- socket->open_cb = open_cb;
- socket->open_cls = open_cb_cls;
- socket->port = app_port;
- /* Set defaults */
- socket->retransmit_timeout = TIME_REL_SECS (default_timeout);
- socket->testing_active = GNUNET_NO;
- socket->max_payload_size = DEFAULT_MAX_PAYLOAD_SIZE;
- va_start (vargs, open_cb_cls); /* Parse variable args */
- do {
- option = va_arg (vargs, enum GNUNET_STREAM_Option);
- switch (option)
- {
- case GNUNET_STREAM_OPTION_INITIAL_RETRANSMIT_TIMEOUT:
- /* Expect struct GNUNET_TIME_Relative */
- socket->retransmit_timeout = va_arg (vargs,
- struct GNUNET_TIME_Relative);
- break;
- case GNUNET_STREAM_OPTION_TESTING_SET_WRITE_SEQUENCE_NUMBER:
- socket->testing_active = GNUNET_YES;
- socket->testing_set_write_sequence_number_value = va_arg (vargs,
- uint32_t);
- break;
- case GNUNET_STREAM_OPTION_LISTEN_TIMEOUT:
- GNUNET_break (0); /* Option irrelevant in STREAM_open */
- break;
- case GNUNET_STREAM_OPTION_SIGNAL_LISTEN_SUCCESS:
- GNUNET_break (0); /* Option irrelevant in STREAM_open */
- break;
- case GNUNET_STREAM_OPTION_MAX_PAYLOAD_SIZE:
- payload_size = (uint16_t) va_arg (vargs, unsigned int);
- GNUNET_assert (0 != payload_size);
- if (payload_size < socket->max_payload_size)
- socket->max_payload_size = payload_size;
- break;
- case GNUNET_STREAM_OPTION_END:
- break;
- }
- } while (GNUNET_STREAM_OPTION_END != option);
- va_end (vargs); /* End of variable args parsing */
- socket->mesh = GNUNET_MESH_connect (cfg, /* the configuration handle */
- socket, /* cls */
- NULL, /* No inbound tunnel handler */
- NULL, /* No in-tunnel cleaner */
- client_message_handlers,
- NULL); /* We don't get inbound tunnels */
- if (NULL == socket->mesh) /* Fail if we cannot connect to mesh */
- {
- GNUNET_free (socket);
- return NULL;
- }
- /* Now create the mesh tunnel to target */
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Creating MESH Tunnel\n");
- socket->tunnel = GNUNET_MESH_tunnel_create (socket->mesh,
- socket, /* Tunnel context */
- &socket->other_peer,
- STREAM_PORT, 1, 0);
- GNUNET_assert (NULL != socket->tunnel);
- socket->stat_handle = GNUNET_STATISTICS_create ("stream", cfg);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s() END\n", __func__);
- return socket;
-}
-
-
-/**
- * Shutdown the stream for reading or writing (similar to man 2 shutdown).
- *
- * @param socket the stream socket
- * @param operation SHUT_RD, SHUT_WR or SHUT_RDWR
- * @param completion_cb the callback that will be called upon successful
- * shutdown of given operation
- * @param completion_cls the closure for the completion callback
- * @return the shutdown handle
- */
-struct GNUNET_STREAM_ShutdownHandle *
-GNUNET_STREAM_shutdown (struct GNUNET_STREAM_Socket *socket,
- int operation,
- GNUNET_STREAM_ShutdownCompletion completion_cb,
- void *completion_cls)
-{
- struct GNUNET_STREAM_ShutdownHandle *handle;
- struct GNUNET_MessageHeader *msg;
-
- GNUNET_assert (NULL == socket->shutdown_handle);
- handle = GNUNET_malloc (sizeof (struct GNUNET_STREAM_ShutdownHandle));
- handle->socket = socket;
- handle->completion_cb = completion_cb;
- handle->completion_cls = completion_cls;
- socket->shutdown_handle = handle;
- if ( ((GNUNET_YES == socket->receive_closed) && (SHUT_RD == operation))
- || ((GNUNET_YES == socket->transmit_closed) && (SHUT_WR == operation))
- || ((GNUNET_YES == socket->transmit_closed)
- && (GNUNET_YES == socket->receive_closed)
- && (SHUT_RDWR == operation)) )
- {
- handle->operation = operation;
- handle->call_cont_task_id = GNUNET_SCHEDULER_add_now (&call_cont_task,
- socket);
- return handle;
- }
- msg = GNUNET_malloc (sizeof (struct GNUNET_MessageHeader));
- msg->size = htons (sizeof (struct GNUNET_MessageHeader));
- switch (operation)
- {
- case SHUT_RD:
- handle->operation = SHUT_RD;
- if (NULL != socket->read_handle)
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Existing read handle should be cancelled before shutting"
- " down reading\n");
- msg->type = htons (GNUNET_MESSAGE_TYPE_STREAM_RECEIVE_CLOSE);
- queue_message (socket, msg, &set_state_receive_close_wait, NULL,
- GNUNET_NO);
- socket->receive_closed = GNUNET_YES;
- break;
- case SHUT_WR:
- handle->operation = SHUT_WR;
- if (NULL != socket->write_handle)
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Existing write handle should be cancelled before shutting"
- " down writing\n");
- msg->type = htons (GNUNET_MESSAGE_TYPE_STREAM_TRANSMIT_CLOSE);
- queue_message (socket, msg, &set_state_transmit_close_wait, NULL,
- GNUNET_NO);
- socket->transmit_closed = GNUNET_YES;
- break;
- case SHUT_RDWR:
- handle->operation = SHUT_RDWR;
- if (NULL != socket->write_handle)
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Existing write handle should be cancelled before shutting"
- " down writing\n");
- if (NULL != socket->read_handle)
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Existing read handle should be cancelled before shutting"
- " down reading\n");
- msg->type = htons (GNUNET_MESSAGE_TYPE_STREAM_CLOSE);
- queue_message (socket, msg, &set_state_close_wait, NULL, GNUNET_NO);
- socket->transmit_closed = GNUNET_YES;
- socket->receive_closed = GNUNET_YES;
- break;
- default:
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "GNUNET_STREAM_shutdown called with invalid value for "
- "parameter operation -- Ignoring\n");
- GNUNET_free (msg);
- GNUNET_free (handle);
- return NULL;
- }
- handle->close_msg_retransmission_task_id =
- GNUNET_SCHEDULER_add_delayed (socket->retransmit_timeout,
- &close_msg_retransmission_task,
- handle);
- return handle;
-}
-
-
-/**
- * Cancels a pending shutdown. Note that the shutdown messages may already be
- * sent and the stream is shutdown already for the operation given to
- * GNUNET_STREAM_shutdown(). This function only clears up any retranmissions of
- * shutdown messages and frees the shutdown handle.
- *
- * @param handle the shutdown handle returned from GNUNET_STREAM_shutdown
- */
-void
-GNUNET_STREAM_shutdown_cancel (struct GNUNET_STREAM_ShutdownHandle *handle)
-{
- if (GNUNET_SCHEDULER_NO_TASK != handle->close_msg_retransmission_task_id)
- GNUNET_SCHEDULER_cancel (handle->close_msg_retransmission_task_id);
- if (GNUNET_SCHEDULER_NO_TASK != handle->call_cont_task_id)
- GNUNET_SCHEDULER_cancel (handle->call_cont_task_id);
- handle->socket->shutdown_handle = NULL;
- GNUNET_free (handle);
-}
-
-
-/**
- * Closes the stream
- *
- * @param socket the stream socket
- */
-void
-GNUNET_STREAM_close (struct GNUNET_STREAM_Socket *socket)
-{
- struct MessageQueue *head;
-
- if (NULL != socket->read_handle)
- {
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Closing STREAM socket when a read handle is pending\n");
- GNUNET_STREAM_read_cancel (socket->read_handle);
- }
- if (NULL != socket->write_handle)
- {
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Closing STREAM socket when a write handle is pending\n");
- GNUNET_STREAM_write_cancel (socket->write_handle);
- //socket->write_handle = NULL;
- }
- /* Terminate the ack'ing task if they are still present */
- if (socket->ack_task_id != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (socket->ack_task_id);
- socket->ack_task_id = GNUNET_SCHEDULER_NO_TASK;
- }
- /* Terminate the control retransmission tasks */
- if (GNUNET_SCHEDULER_NO_TASK != socket->control_retransmission_task_id)
- {
- GNUNET_SCHEDULER_cancel (socket->control_retransmission_task_id);
- }
- /* Clear Transmit handles */
- if (NULL != socket->transmit_handle)
- {
- GNUNET_MESH_notify_transmit_ready_cancel (socket->transmit_handle);
- socket->transmit_handle = NULL;
- }
- /* Clear existing message queue */
- while (NULL != (head = socket->queue_head)) {
- GNUNET_CONTAINER_DLL_remove (socket->queue_head,
- socket->queue_tail,
- head);
- GNUNET_free (head->message);
- GNUNET_free (head);
- }
- /* Close associated tunnel */
- if (NULL != socket->tunnel)
- {
- GNUNET_MESH_tunnel_destroy (socket->tunnel);
- socket->tunnel = NULL;
- }
- /* Close mesh connection */
- if ((NULL != socket->mesh) && (NULL == socket->lsocket))
- {
- GNUNET_MESH_disconnect (socket->mesh);
- socket->mesh = NULL;
- }
- /* Close statistics connection */
- if ( (NULL != socket->stat_handle) && (NULL == socket->lsocket) )
- GNUNET_STATISTICS_destroy (socket->stat_handle, GNUNET_YES);
- /* Release receive buffer */
- if (NULL != socket->receive_buffer)
- {
- GNUNET_free (socket->receive_buffer);
- }
- GNUNET_free (socket);
-}
-
-
-/**
- * Listens for stream connections for a specific application ports
- *
- * @param cfg the configuration to use
- * @param app_port the application port for which new streams will be accepted
- * @param listen_cb this function will be called when a peer tries to establish
- * a stream with us
- * @param listen_cb_cls closure for listen_cb
- * @param ... options to the stream, terminated by GNUNET_STREAM_OPTION_END
- * @return listen socket, NULL for any error
- */
-struct GNUNET_STREAM_ListenSocket *
-GNUNET_STREAM_listen (const struct GNUNET_CONFIGURATION_Handle *cfg,
- uint32_t app_port,
- GNUNET_STREAM_ListenCallback listen_cb,
- void *listen_cb_cls,
- ...)
-{
- struct GNUNET_STREAM_ListenSocket *lsocket;
- struct GNUNET_TIME_Relative listen_timeout;
- enum GNUNET_STREAM_Option option;
- va_list vargs;
- uint16_t payload_size;
-
- GNUNET_assert (NULL != listen_cb);
- lsocket = GNUNET_malloc (sizeof (struct GNUNET_STREAM_ListenSocket));
- lsocket->cfg = GNUNET_CONFIGURATION_dup (cfg);
- lsocket->lockmanager = GNUNET_LOCKMANAGER_connect (lsocket->cfg);
- if (NULL == lsocket->lockmanager)
- {
- GNUNET_CONFIGURATION_destroy (lsocket->cfg);
- GNUNET_free (lsocket);
- return NULL;
- }
- lsocket->listening = GNUNET_NO;/* We listen when we get a lock on app_port */
- /* Set defaults */
- lsocket->retransmit_timeout = TIME_REL_SECS (default_timeout);
- lsocket->testing_active = GNUNET_NO;
- lsocket->listen_ok_cb = NULL;
- lsocket->max_payload_size = DEFAULT_MAX_PAYLOAD_SIZE;
- listen_timeout = TIME_REL_SECS (60); /* A minute for listen timeout */
- va_start (vargs, listen_cb_cls);
- do {
- option = va_arg (vargs, enum GNUNET_STREAM_Option);
- switch (option)
- {
- case GNUNET_STREAM_OPTION_INITIAL_RETRANSMIT_TIMEOUT:
- lsocket->retransmit_timeout = va_arg (vargs,
- struct GNUNET_TIME_Relative);
- break;
- case GNUNET_STREAM_OPTION_TESTING_SET_WRITE_SEQUENCE_NUMBER:
- lsocket->testing_active = GNUNET_YES;
- lsocket->testing_set_write_sequence_number_value = va_arg (vargs,
- uint32_t);
- break;
- case GNUNET_STREAM_OPTION_LISTEN_TIMEOUT:
- listen_timeout = GNUNET_TIME_relative_multiply
- (GNUNET_TIME_UNIT_MILLISECONDS, va_arg (vargs, uint32_t));
- break;
- case GNUNET_STREAM_OPTION_SIGNAL_LISTEN_SUCCESS:
- lsocket->listen_ok_cb = va_arg (vargs,
- GNUNET_STREAM_ListenSuccessCallback);
- break;
- case GNUNET_STREAM_OPTION_MAX_PAYLOAD_SIZE:
- payload_size = (uint16_t) va_arg (vargs, unsigned int);
- GNUNET_assert (0 != payload_size);
- if (payload_size < lsocket->max_payload_size)
- lsocket->max_payload_size = payload_size;
- break;
- case GNUNET_STREAM_OPTION_END:
- break;
- }
- } while (GNUNET_STREAM_OPTION_END != option);
- va_end (vargs);
- lsocket->port = app_port;
- lsocket->listen_cb = listen_cb;
- lsocket->listen_cb_cls = listen_cb_cls;
- lsocket->locking_request =
- GNUNET_LOCKMANAGER_acquire_lock (lsocket->lockmanager, locking_domain,
- (uint32_t) lsocket->port,
- &lock_status_change_cb, lsocket);
- lsocket->lockmanager_acquire_timeout_task =
- GNUNET_SCHEDULER_add_delayed (listen_timeout,
- &lockmanager_acquire_timeout, lsocket);
- lsocket->stat_handle = GNUNET_STATISTICS_create ("stream",
- lsocket->cfg);
- return lsocket;
-}
-
-
-/**
- * Closes the listen socket
- *
- * @param lsocket the listen socket
- */
-void
-GNUNET_STREAM_listen_close (struct GNUNET_STREAM_ListenSocket *lsocket)
-{
- /* Close MESH connection */
- if (NULL != lsocket->mesh)
- GNUNET_MESH_disconnect (lsocket->mesh);
- if (NULL != lsocket->stat_handle)
- GNUNET_STATISTICS_destroy (lsocket->stat_handle, GNUNET_YES);
- GNUNET_CONFIGURATION_destroy (lsocket->cfg);
- if (GNUNET_SCHEDULER_NO_TASK != lsocket->lockmanager_acquire_timeout_task)
- GNUNET_SCHEDULER_cancel (lsocket->lockmanager_acquire_timeout_task);
- if (NULL != lsocket->locking_request)
- GNUNET_LOCKMANAGER_cancel_request (lsocket->locking_request);
- if (NULL != lsocket->lockmanager)
- GNUNET_LOCKMANAGER_disconnect (lsocket->lockmanager);
- GNUNET_free (lsocket);
-}
-
-
-/**
- * Tries to write the given data to the stream. The maximum size of data that
- * can be written per a write operation is ~ 4MB (64 * (64000 - sizeof (struct
- * GNUNET_STREAM_DataMessage))). If size is greater than this it is not an API
- * violation, however only the said number of maximum bytes will be written.
- *
- * @param socket the socket representing a stream
- * @param data the data buffer from where the data is written into the stream
- * @param size the number of bytes to be written from the data buffer
- * @param timeout the timeout period
- * @param write_cont the function to call upon writing some bytes into the
- * stream
- * @param write_cont_cls the closure
- *
- * @return handle to cancel the operation; if a previous write is pending NULL
- * is returned. If the stream has been shutdown for this operation or
- * is broken then write_cont is immediately called and NULL is
- * returned.
- */
-struct GNUNET_STREAM_WriteHandle *
-GNUNET_STREAM_write (struct GNUNET_STREAM_Socket *socket,
- const void *data,
- size_t size,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_STREAM_CompletionContinuation write_cont,
- void *write_cont_cls)
-{
- struct GNUNET_STREAM_WriteHandle *io_handle;
- struct GNUNET_STREAM_DataMessage *dmsg;
- const void *sweep;
- struct GNUNET_TIME_Relative ack_deadline;
- unsigned int num_needed_packets;
- unsigned int cnt;
- uint32_t packet_size;
- uint32_t payload_size;
- uint16_t max_data_packet_size;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s\n", __func__);
- if (NULL != socket->write_handle)
- {
- GNUNET_break (0);
- return NULL;
- }
- if (NULL == socket->tunnel)
- {
- if (NULL != write_cont)
- write_cont (write_cont_cls, GNUNET_STREAM_SYSERR, 0);
- return NULL;
- }
- switch (socket->state)
- {
- case STATE_TRANSMIT_CLOSED:
- case STATE_TRANSMIT_CLOSE_WAIT:
- case STATE_CLOSED:
- case STATE_CLOSE_WAIT:
- if (NULL != write_cont)
- write_cont (write_cont_cls, GNUNET_STREAM_SHUTDOWN, 0);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s() END\n", __func__);
- return NULL;
- case STATE_INIT:
- case STATE_LISTEN:
- case STATE_HELLO_WAIT:
- if (NULL != write_cont)
- write_cont (write_cont_cls, GNUNET_STREAM_SYSERR, 0);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s() END\n", __func__);
- return NULL;
- case STATE_ESTABLISHED:
- case STATE_RECEIVE_CLOSED:
- case STATE_RECEIVE_CLOSE_WAIT:
- break;
- }
- if (GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH * socket->max_payload_size < size)
- size = GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH * socket->max_payload_size;
- num_needed_packets =
- (size + (socket->max_payload_size - 1)) / socket->max_payload_size;
- io_handle = GNUNET_malloc (sizeof (struct GNUNET_STREAM_WriteHandle));
- io_handle->socket = socket;
- io_handle->write_cont = write_cont;
- io_handle->write_cont_cls = write_cont_cls;
- io_handle->size = size;
- io_handle->packets_sent = 0;
- sweep = data;
- /* FIXME: Remove the fixed delay for ack deadline; Set it to the value
- determined from RTT */
- ack_deadline = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5);
- /* Divide the given buffer into packets for sending */
- max_data_packet_size =
- socket->max_payload_size + sizeof (struct GNUNET_STREAM_DataMessage);
- io_handle->max_ack_base_num = socket->write_sequence_number;
- for (cnt=0; cnt < num_needed_packets; cnt++)
- {
- if ((cnt + 1) * socket->max_payload_size < size)
- {
- payload_size = socket->max_payload_size;
- packet_size = max_data_packet_size;
- }
- else
- {
- payload_size = size - (cnt * socket->max_payload_size);
- packet_size = payload_size + sizeof (struct GNUNET_STREAM_DataMessage);
- }
- dmsg = GNUNET_malloc (packet_size);
- dmsg->header.size = htons (packet_size);
- dmsg->header.type = htons (GNUNET_MESSAGE_TYPE_STREAM_DATA);
- dmsg->sequence_number = htonl (socket->write_sequence_number++);
- dmsg->offset = htonl (socket->write_offset);
- /* FIXME: Remove the fixed delay for ack deadline; Set it to the value
- determined from RTT */
- dmsg->ack_deadline = GNUNET_TIME_relative_hton (ack_deadline);
- /* Copy data from given buffer to the packet */
- memcpy (&dmsg[1], sweep, payload_size);
- io_handle->messages[cnt] = dmsg;
- sweep += payload_size;
- socket->write_offset += payload_size;
- }
- /* ack the last data message. FIXME: remove when we figure out how to do this
- using RTT */
- io_handle->messages[num_needed_packets - 1]->ack_deadline =
- GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_ZERO);
- socket->data_retransmit_timeout = GNUNET_TIME_UNIT_SECONDS;
- socket->write_handle = io_handle;
- write_data (socket);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s() END\n", __func__);
- return io_handle;
-}
-
-
-/**
- * Function to check the ACK bitmap for any received messages and call the data processor
- *
- * @param cls the socket
- * @param tc the scheduler task context
- */
-static void
-probe_data_availability (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_STREAM_Socket *socket = cls;
-
- GNUNET_assert (NULL != socket->read_handle);
- socket->read_handle->probe_data_availability_task_id =
- GNUNET_SCHEDULER_NO_TASK;
- if (GNUNET_SCHEDULER_NO_TASK != socket->read_handle->read_task_id)
- return; /* A task to call read processor is present */
- if (GNUNET_YES == ackbitmap_is_bit_set (&socket->ack_bitmap,
- 0))
- socket->read_handle->read_task_id
- = GNUNET_SCHEDULER_add_now (&call_read_processor, socket);
-}
-
-
-/**
- * Tries to read data from the stream. Should not be called when another read
- * handle is present; the existing read handle should be canceled with
- * GNUNET_STREAM_read_cancel(). Only one read handle per socket is present at
- * any time
- *
- * @param socket the socket representing a stream
- * @param timeout the timeout period
- * @param proc function to call with data (once only)
- * @param proc_cls the closure for proc
- * @return handle to cancel the operation; NULL is returned if the stream has
- * been shutdown for this type of opeartion (the DataProcessor is
- * immediately called with GNUNET_STREAM_SHUTDOWN as status)
- */
-struct GNUNET_STREAM_ReadHandle *
-GNUNET_STREAM_read (struct GNUNET_STREAM_Socket *socket,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_STREAM_DataProcessor proc,
- void *proc_cls)
-{
- struct GNUNET_STREAM_ReadHandle *read_handle;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: %s()\n",
- GNUNET_i2s (&socket->other_peer),
- __func__);
- /* Only one read handle is permitted at any time; cancel the existing or wait
- for it to complete */
- GNUNET_assert (NULL == socket->read_handle);
- GNUNET_assert (NULL != proc);
- if (GNUNET_YES == socket->receive_closed)
- return NULL;
- switch (socket->state)
- {
- case STATE_RECEIVE_CLOSED:
- case STATE_RECEIVE_CLOSE_WAIT:
- case STATE_CLOSED:
- case STATE_CLOSE_WAIT:
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%s: %s() END\n",
- GNUNET_i2s (&socket->other_peer),
- __func__);
- proc (proc_cls, GNUNET_STREAM_SHUTDOWN, NULL, 0);
- return NULL;
- default:
- break;
- }
- read_handle = GNUNET_malloc (sizeof (struct GNUNET_STREAM_ReadHandle));
- read_handle->proc = proc;
- read_handle->proc_cls = proc_cls;
- read_handle->socket = socket;
- socket->read_handle = read_handle;
- read_handle->probe_data_availability_task_id =
- GNUNET_SCHEDULER_add_now (&probe_data_availability, socket);
- read_handle->read_io_timeout_task_id =
- GNUNET_SCHEDULER_add_delayed (timeout, &read_io_timeout, socket);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "%s: %s() END\n",
- GNUNET_i2s (&socket->other_peer), __func__);
- return read_handle;
-}
-
-
-/**
- * Cancels pending write operation. Also cancels packet retransmissions which
- * may have resulted otherwise.
- *
- * CAUTION: Normally a write operation is considered successful if the data
- * given to it is sent and acknowledged by the receiver. As data is divided
- * into packets, it is possible that not all packets are received by the
- * receiver. Any missing packets are then retransmitted till the receiver
- * acknowledges all packets or until a timeout . During this scenario if the
- * write operation is cancelled all such retransmissions are also
- * cancelled. This may leave the receiver's receive buffer incompletely filled
- * as some missing packets are never retransmitted. So this operation should be
- * used before shutting down transmission from our side or before closing the
- * socket.
- *
- * @param wh write operation handle to cancel
- */
-void
-GNUNET_STREAM_write_cancel (struct GNUNET_STREAM_WriteHandle *wh)
-{
- struct GNUNET_STREAM_Socket *socket = wh->socket;
- unsigned int packet;
-
- GNUNET_assert (NULL != socket->write_handle);
- GNUNET_assert (socket->write_handle == wh);
- if (GNUNET_SCHEDULER_NO_TASK != socket->data_retransmission_task_id)
- {
- GNUNET_SCHEDULER_cancel (socket->data_retransmission_task_id);
- socket->data_retransmission_task_id = GNUNET_SCHEDULER_NO_TASK;
- }
- for (packet=0; packet < GNUNET_STREAM_ACK_BITMAP_BIT_LENGTH; packet++)
- {
- if (NULL == wh->messages[packet]) break;
- GNUNET_free (wh->messages[packet]);
- }
- GNUNET_free (socket->write_handle);
- socket->write_handle = NULL;
-}
-
-
-/**
- * Cancel pending read operation.
- *
- * @param rh read operation handle to cancel
- */
-void
-GNUNET_STREAM_read_cancel (struct GNUNET_STREAM_ReadHandle *rh)
-{
- struct GNUNET_STREAM_Socket *socket;
-
- socket = rh->socket;
- GNUNET_assert (NULL != socket->read_handle);
- GNUNET_assert (rh == socket->read_handle);
- cleanup_read_handle (socket);
-}
-
-
-/**
- * Functions of this signature are called whenever writing operations
- * on a stream are executed
- *
- * @param cls the closure from GNUNET_STREAM_write
- * @param status the status of the stream at the time this function is called;
- * GNUNET_STREAM_OK if writing to stream was completed successfully;
- * GNUNET_STREAM_TIMEOUT if the given data is not sent successfully
- * (this doesn't mean that the data is never sent, the receiver may
- * have read the data but its ACKs may have been lost);
- * GNUNET_STREAM_SHUTDOWN if the stream is shutdown for writing in the
- * mean time; GNUNET_STREAM_SYSERR if the stream is broken and cannot
- * be processed.
- * @param size the number of bytes written
- */
-static void
-mq_stream_write_queued (void *cls, enum GNUNET_STREAM_Status status,
- size_t size)
-{
- struct GNUNET_MQ_Handle *mq = cls;
- struct MQStreamState *mss = GNUNET_MQ_impl_state (mq);
-
- switch (status)
- {
- case GNUNET_STREAM_OK:
- break;
- case GNUNET_STREAM_SHUTDOWN:
- /* FIXME: call shutdown handler */
- return;
- case GNUNET_STREAM_TIMEOUT:
- GNUNET_MQ_inject_error (mq, GNUNET_MQ_ERROR_TIMEOUT);
- return;
- case GNUNET_STREAM_SYSERR:
- GNUNET_MQ_inject_error (mq, GNUNET_MQ_ERROR_WRITE);
- return;
- default:
- GNUNET_assert (0);
- return;
- }
-
- mss->wh = NULL;
-
- GNUNET_MQ_impl_send_continue (mq);
-}
-
-
-static void
-mq_stream_send_impl (struct GNUNET_MQ_Handle *mq,
- const struct GNUNET_MessageHeader *msg, void *impl_state)
-{
- struct MQStreamState *mss = impl_state;
-
- /* no way to cancel sending now */
- GNUNET_MQ_impl_send_commit (mq);
-
- mss->wh = GNUNET_STREAM_write (mss->socket, msg, ntohs (msg->size),
- GNUNET_TIME_UNIT_FOREVER_REL,
- mq_stream_write_queued, mq);
-}
-
-
-/**
- * Functions with this signature are called whenever a
- * complete message is received by the tokenizer.
- *
- * Do not call GNUNET_SERVER_mst_destroy in 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
- */
-static int
-mq_stream_mst_callback (void *cls, void *client,
- const struct GNUNET_MessageHeader *message)
-{
- struct GNUNET_MQ_Handle *mq = cls;
-
- GNUNET_assert (NULL != message);
- GNUNET_MQ_inject_message (mq, message);
- return GNUNET_OK;
-}
-
-
-/**
- * Functions of this signature are called whenever data is available from the
- * stream.
- *
- * @param cls the closure from GNUNET_STREAM_read
- * @param status the status of the stream at the time this function is called
- * @param data traffic from the other side
- * @param size the number of bytes available in data read; will be 0 on timeout
- * @return number of bytes of processed from 'data' (any data remaining should be
- * given to the next time the read processor is called).
- */
-static size_t
-mq_stream_data_processor (void *cls,
- enum GNUNET_STREAM_Status status,
- const void *data,
- size_t size)
-{
- struct GNUNET_MQ_Handle *mq = cls;
- struct MQStreamState *mss = GNUNET_MQ_impl_state (mq);
- int ret;
-
- switch (status)
- {
- case GNUNET_STREAM_OK:
- break;
- case GNUNET_STREAM_SHUTDOWN:
- /* FIXME: call shutdown handler */
- return 0;
- case GNUNET_STREAM_TIMEOUT:
- GNUNET_MQ_inject_error (mq, GNUNET_MQ_ERROR_TIMEOUT);
- return 0;
- case GNUNET_STREAM_SYSERR:
- GNUNET_MQ_inject_error (mq, GNUNET_MQ_ERROR_READ);
- return 0;
- default:
- GNUNET_assert (0);
- return 0;
- }
-
- ret = GNUNET_SERVER_mst_receive (mss->mst, NULL, data, size, GNUNET_NO, GNUNET_NO);
- if (GNUNET_OK != ret)
- {
- GNUNET_MQ_inject_error (mq, GNUNET_MQ_ERROR_READ);
- return 0;
- }
- mss->rh = GNUNET_STREAM_read (mss->socket, GNUNET_TIME_UNIT_FOREVER_REL,
- mq_stream_data_processor, mq);
- /* we always read all data */
- return size;
-}
-
-
-static void
-mq_stream_destroy_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
-{
- struct MQStreamState *mss = impl_state;
-
- if (NULL != mss->rh)
- {
- GNUNET_STREAM_read_cancel (mss->rh);
- mss->rh = NULL;
- }
-
- if (NULL != mss->wh)
- {
- GNUNET_STREAM_write_cancel (mss->wh);
- mss->wh = NULL;
- }
-
- if (NULL != mss->mst)
- {
- GNUNET_SERVER_mst_destroy (mss->mst);
- mss->mst = NULL;
- }
-
- GNUNET_free (mss);
-}
-
-
-
-/**
- * Create a message queue for a stream socket.
- *
- * @param socket the socket to read/write in the message queue
- * @param msg_handlers message handler array
- * @param error_handler callback for errors
- * @param cls closure for message handlers and error handler
- * @return the message queue for the socket
- */
-struct GNUNET_MQ_Handle *
-GNUNET_STREAM_mq_create (struct GNUNET_STREAM_Socket *socket,
- const struct GNUNET_MQ_MessageHandler *msg_handlers,
- GNUNET_MQ_ErrorHandler error_handler,
- void *cls)
-{
- struct GNUNET_MQ_Handle *mq;
- struct MQStreamState *mss;
-
- mss = GNUNET_new (struct MQStreamState);
- mss->socket = socket;
- mq = GNUNET_MQ_queue_for_callbacks (mq_stream_send_impl,
- mq_stream_destroy_impl,
- NULL,
- mss, msg_handlers, error_handler, cls);
- if (NULL != msg_handlers)
- {
- mss->mst = GNUNET_SERVER_mst_create (mq_stream_mst_callback, mq);
- mss->rh = GNUNET_STREAM_read (socket, GNUNET_TIME_UNIT_FOREVER_REL,
- mq_stream_data_processor, mq);
- }
- return mq;
-}
-
-/* end of stream_api.c */
projects / oweals / gnunet.git / commitdiff