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add more couters, better process vs and vr 

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@110 a93c3328-9c30-0410-af19-c9cd2b2d52af
This commit is contained in:
Anthony Minessale 2007-05-23 18:19:04 +00:00
parent 43bc6035d2
commit b5d1ff62b6
2 changed files with 27 additions and 7 deletions
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33
libs/freetdm/src/isdn/Q921.c
View File

@ -64,8 +64,9 @@ void Q921_InitTrunk(L2TRUNK trunk,
MFIFOCreate(trunk->HDLCInQueue, Q921MAXHDLCSPACE, 10);
trunk->initialized = INITIALIZED_MAGIC;
}
trunk->va = 0;
trunk->vs = 0;
trunk->vr = 0;
trunk->vs = 0;
trunk->state = 0;
trunk->sapi = sapi;
trunk->tei = tei;
@ -355,6 +356,7 @@ int Q921ProcSABME(L2TRUNK trunk, L2UCHAR *mes, L2INT size)
trunk->vr=0;
trunk->vs=0;
trunk->va=0;
return 1;
}
@ -382,29 +384,46 @@ int Q921Rx12(L2TRUNK trunk)
L2UCHAR *mes;
L2INT rs,size; /* receive size & Q921 frame size*/
L2UCHAR *smes = MFIFOGetMesPtr(trunk->HDLCInQueue, &size);
L2UCHAR nr;
if(smes != NULL)
{
if ((mes[2] & 3) != 3) {
/* we have an S or I frame */
/* if nr is between va and vs, update our va counter */
nr = (mes[3] >> 1);
if (nr >= trunk->va && nr <= trunk->vs) {
trunk->va = nr;
}
}
rs = size - trunk->Q921HeaderSpace;
mes = &smes[trunk->Q921HeaderSpace];
/* check for I frame */
if((mes[2] & 0x01) == 0)
{
if(Q921Tx23Proc(trunk, smes, size-2)) /* -2 to clip away CRC */
L2INT vs = trunk->vs;
/* we increment before we "really" know its good so that if we send in the callback, we use the right nr */
trunk->vr++;
if(Q921Tx23Proc(trunk, smes, size-2) >= 0) /* -2 to clip away CRC */
{
trunk->vr++;
Q921SendRR(trunk, (mes[0]&0xfc)>>2, (mes[0]>>1)&0x01,mes[1]>>1, mes[3]&0x01);
}
if (vs == trunk->vs) {
Q921SendRR(trunk, (mes[0]&0xfc)>>2, (mes[0]>>1)&0x01,mes[1]>>1, mes[3]&0x01);
}
}
else
{
/* todo: whatever*/
}
trunk->vr--;
}
}
/* check for RR */
else if(mes[2] ==0x01)
{
/* todo: we probably should schedule to send RR at timeout here */
/* todo: check if RR is responce to I */
Q921SendRR(trunk, (mes[0]&0xfc)>>2, (mes[0]>>1)&0x01,mes[1]>>1, mes[2]&0x01);
}

1
libs/freetdm/src/isdn/include/Q921.h
View File

@ -98,6 +98,7 @@ struct Q921Data
{
L2UCHAR HDLCInQueue[Q921MAXHDLCSPACE];
L2INT initialized;
L2UCHAR va;
L2UCHAR vs;
L2UCHAR vr;
L2INT state;