/// <summary>
/// Constructor.
/// </summary>
/// <param name="agent">The <see cref="ISipAgent" /> that owns this transaction.</param>
/// <param name="id">The globally unique transaction ID.</param>
/// <param name="transport">The <see cref="ISipTransport" /> to be used for this transaction.</param>
/// <remarks>
/// The timers <see cref="TimerA" /> through <see cref="TimerK" /> are initialized
/// with the correct <see cref="PolledTimer.Interval" /> values for the given transport.
/// These timers will then need to be <see cref="PolledTimer.Reset()" /> before they
/// are actually used so they will be scheduled to fire at the correct time.
/// </remarks>
protected SipTransaction(ISipAgent agent, string id, ISipTransport transport)
{
this.agent = agent;
this.id = id;
this.state = SipTransactionState.Unknown;
this.transport = transport;
this.baseTimers = transport.Settings.BaseTimers;
this.agentState = null;
}
/// <summary>
/// Sets a new transaction state.
/// </summary>
/// <param name="newState">The new state.</param>
private void SetState(SipTransactionState newState)
{
SipTransactionState oldState;
if (newState == base.State)
{
return;
}
oldState = base.State;
base.State = newState;
switch (newState)
{
case SipTransactionState.InviteCalling:
break;
case SipTransactionState.InviteProceeding:
break;
case SipTransactionState.InviteCompleted:
base.TimerG.Interval = base.BaseTimers.T1;
base.TimerH.Interval = Helper.Multiply(base.BaseTimers.T1, 64);
break;
case SipTransactionState.InviteConfirmed:
base.TimerI.Interval = isUdp ? base.BaseTimers.T4 : TimeSpan.Zero;
break;
case SipTransactionState.Trying:
break;
case SipTransactionState.Proceeding:
break;
case SipTransactionState.Completed:
base.TimerJ.Interval = isUdp ? Helper.Multiply(base.BaseTimers.T1, 64) : TimeSpan.Zero;
break;
case SipTransactionState.Terminated:
break;
}
}
/// <summary>
/// Sets a new transaction state.
/// </summary>
/// <param name="newState">The new state.</param>
private void SetState(SipTransactionState newState)
{
SipTransactionState oldState;
if (newState == base.State)
{
return;
}
oldState = base.State;
base.State = newState;
switch (newState)
{
case SipTransactionState.InviteCalling:
if (isUdp)
{
base.TimerA.Interval = base.BaseTimers.T1;
}
base.TimerB.Interval = Helper.Multiply(base.BaseTimers.T1, 64);
break;
case SipTransactionState.InviteProceeding:
break;
case SipTransactionState.InviteCompleted:
if (isUdp)
{
base.TimerD.Interval = Helper.Min(Helper.Multiply(base.BaseTimers.T1, 64), TimeSpan.FromSeconds(32));
}
else
{
base.TimerD.Interval = TimeSpan.Zero;
}
break;
case SipTransactionState.Trying:
base.TimerF.Interval = Helper.Multiply(base.BaseTimers.T1, 64);
if (isUdp)
{
base.TimerE.Interval = base.BaseTimers.T1;
}
break;
case SipTransactionState.Proceeding:
break;
case SipTransactionState.Completed:
if (isUdp)
{
base.TimerK.Interval = base.BaseTimers.T4;
}
else
{
base.State = SipTransactionState.Terminated;
}
break;
case SipTransactionState.Terminated:
break;
}
}
