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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| #include "yojimbo_network_simulator.h" | ||
| #include "yojimbo_platform.h" | ||
| #include "yojimbo_utils.h" | ||
|
|
||
| namespace yojimbo | ||
| { | ||
| NetworkSimulator::NetworkSimulator( Allocator & allocator, int numPackets, double time ) | ||
| { | ||
| yojimbo_assert( numPackets > 0 ); | ||
| m_allocator = &allocator; | ||
| m_currentIndex = 0; | ||
| m_time = time; | ||
| m_latency = 0.0f; | ||
| m_jitter = 0.0f; | ||
| m_packetLoss = 0.0f; | ||
| m_duplicates = 0.0f; | ||
| m_active = false; | ||
| m_numPacketEntries = numPackets; | ||
| m_packetEntries = (PacketEntry*) YOJIMBO_ALLOCATE( allocator, sizeof( PacketEntry ) * numPackets ); | ||
| yojimbo_assert( m_packetEntries ); | ||
| memset( m_packetEntries, 0, sizeof( PacketEntry ) * numPackets ); | ||
| } | ||
|
|
||
| NetworkSimulator::~NetworkSimulator() | ||
| { | ||
| yojimbo_assert( m_allocator ); | ||
| yojimbo_assert( m_packetEntries ); | ||
| yojimbo_assert( m_numPacketEntries > 0 ); | ||
| DiscardPackets(); | ||
| YOJIMBO_FREE( *m_allocator, m_packetEntries ); | ||
| m_numPacketEntries = 0; | ||
| m_allocator = NULL; | ||
| } | ||
|
|
||
| void NetworkSimulator::SetLatency( float milliseconds ) | ||
| { | ||
| m_latency = milliseconds; | ||
| UpdateActive(); | ||
| } | ||
|
|
||
| void NetworkSimulator::SetJitter( float milliseconds ) | ||
| { | ||
| m_jitter = milliseconds; | ||
| UpdateActive(); | ||
| } | ||
|
|
||
| void NetworkSimulator::SetPacketLoss( float percent ) | ||
| { | ||
| m_packetLoss = percent; | ||
| UpdateActive(); | ||
| } | ||
|
|
||
| void NetworkSimulator::SetDuplicates( float percent ) | ||
| { | ||
| m_duplicates = percent; | ||
| UpdateActive(); | ||
| } | ||
|
|
||
| bool NetworkSimulator::IsActive() const | ||
| { | ||
| return m_active; | ||
| } | ||
|
|
||
| void NetworkSimulator::UpdateActive() | ||
| { | ||
| bool previous = m_active; | ||
| m_active = m_latency != 0.0f || m_jitter != 0.0f || m_packetLoss != 0.0f || m_duplicates != 0.0f; | ||
| if ( previous && !m_active ) | ||
| { | ||
| DiscardPackets(); | ||
| } | ||
| } | ||
|
|
||
| void NetworkSimulator::SendPacket( int to, uint8_t * packetData, int packetBytes ) | ||
| { | ||
| yojimbo_assert( m_allocator ); | ||
| yojimbo_assert( packetData ); | ||
| yojimbo_assert( packetBytes > 0 ); | ||
|
|
||
| if ( yojimbo_random_float( 0.0f, 100.0f ) <= m_packetLoss ) | ||
| { | ||
| return; | ||
| } | ||
|
|
||
| PacketEntry & packetEntry = m_packetEntries[m_currentIndex]; | ||
|
|
||
| if ( packetEntry.packetData ) | ||
| { | ||
| YOJIMBO_FREE( *m_allocator, packetEntry.packetData ); | ||
| packetEntry = PacketEntry(); | ||
| } | ||
|
|
||
| double delay = m_latency / 1000.0; | ||
|
|
||
| if ( m_jitter > 0 ) | ||
| delay += yojimbo_random_float( -m_jitter, +m_jitter ) / 1000.0; | ||
|
|
||
| packetEntry.to = to; | ||
| packetEntry.packetData = (uint8_t*) YOJIMBO_ALLOCATE( *m_allocator, packetBytes ); | ||
| memcpy( packetEntry.packetData, packetData, packetBytes ); | ||
| packetEntry.packetBytes = packetBytes; | ||
| packetEntry.deliveryTime = m_time + delay; | ||
| m_currentIndex = ( m_currentIndex + 1 ) % m_numPacketEntries; | ||
|
|
||
| if ( yojimbo_random_float( 0.0f, 100.0f ) <= m_duplicates ) | ||
| { | ||
| PacketEntry & nextPacketEntry = m_packetEntries[m_currentIndex]; | ||
| nextPacketEntry.to = to; | ||
| nextPacketEntry.packetData = (uint8_t*) YOJIMBO_ALLOCATE( *m_allocator, packetBytes ); | ||
| memcpy( nextPacketEntry.packetData, packetData, packetBytes ); | ||
| nextPacketEntry.packetBytes = packetBytes; | ||
| nextPacketEntry.deliveryTime = m_time + delay + yojimbo_random_float( 0, +1.0 ); | ||
| m_currentIndex = ( m_currentIndex + 1 ) % m_numPacketEntries; | ||
| } | ||
| } | ||
|
|
||
| int NetworkSimulator::ReceivePackets( int maxPackets, uint8_t * packetData[], int packetBytes[], int to[] ) | ||
| { | ||
| if ( !IsActive() ) | ||
| return 0; | ||
|
|
||
| int numPackets = 0; | ||
|
|
||
| for ( int i = 0; i < yojimbo_min( m_numPacketEntries, maxPackets ); ++i ) | ||
| { | ||
| if ( !m_packetEntries[i].packetData ) | ||
| continue; | ||
|
|
||
| if ( m_packetEntries[i].deliveryTime < m_time ) | ||
| { | ||
| packetData[numPackets] = m_packetEntries[i].packetData; | ||
| packetBytes[numPackets] = m_packetEntries[i].packetBytes; | ||
| if ( to ) | ||
| { | ||
| to[numPackets] = m_packetEntries[i].to; | ||
| } | ||
| m_packetEntries[i].packetData = NULL; | ||
| numPackets++; | ||
| } | ||
| } | ||
|
|
||
| return numPackets; | ||
| } | ||
|
|
||
| void NetworkSimulator::DiscardPackets() | ||
| { | ||
| for ( int i = 0; i < m_numPacketEntries; ++i ) | ||
| { | ||
| PacketEntry & packetEntry = m_packetEntries[i]; | ||
| if ( !packetEntry.packetData ) | ||
| continue; | ||
| YOJIMBO_FREE( *m_allocator, packetEntry.packetData ); | ||
| packetEntry = PacketEntry(); | ||
| } | ||
| } | ||
|
|
||
| void NetworkSimulator::DiscardClientPackets( int clientIndex ) | ||
| { | ||
| for ( int i = 0; i < m_numPacketEntries; ++i ) | ||
| { | ||
| PacketEntry & packetEntry = m_packetEntries[i]; | ||
| if ( !packetEntry.packetData || packetEntry.to != clientIndex ) | ||
| continue; | ||
| YOJIMBO_FREE( *m_allocator, packetEntry.packetData ); | ||
| packetEntry = PacketEntry(); | ||
| } | ||
| } | ||
|
|
||
| void NetworkSimulator::AdvanceTime( double time ) | ||
| { | ||
| m_time = time; | ||
| } | ||
| } |
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