[asterisk-ss7] Asterisk with one signalling link but 2 opc

[Mehdi Shirazi]

Hi
Thank you for reply.
for simulating a real PSTN network scenario I still need to have 2 point code in asterisk and one signaling link for them.
In existing libss7 ,if we have 2 signaling links on 2 linksets with 2 opc for Asterisk there is no problem.
I looked at source of libss7 I saw in mtp3.c:( with my limited programming knowledge)
if (ss7->pc != rl.dpc) {
ss7_error(ss7, "Received message destined for point code 0x%x, but we are 0x%x.  Dropping\n", rl.dpc, ss7->pc);
....
switch (userpart) {
	case SIG_ISUP:
		if (link->adj_sp->state == MTP3_UP) {
                	return isup_receive(ss7, link, &rl, sif + rlsize, siflen - rlsize);

so it seems for every linkset there is a "struct ss7", and if we can query existing list of "struct ss7"s(linksets) and find
matching ss7->pc with received MSU point code, we can put correct address of "struct ss7" in "isup_receive()" function 
and send the call to it's appropriate linkset.
according to my grep libss7 allocate new "struct ss7" with  *ss7_new(int switchtype) function but I cannot find where
libss7 call this function and where is list of allocated "struct ss7"= linksets 
Do you agree with me and could you please help me ?

Regards
M.Shirazi



--------------------------------------------
On Mon, 3/21/16, Kaloyan Kovachev <kkovachev at varna.net> wrote:

 Subject: Re: [asterisk-ss7] Asterisk with one signalling link but 2 opc
 To: "Mehdi Shirazi" <mahdi_shirazi at yahoo.com>, asterisk-ss7 at lists.digium.com
 Date: Monday, March 21, 2016, 8:11 AM
 
 Hi,
 Asterisk (with libss7) is a signaling end-point, so you
 can't have two 
 point-codes - you need an STP (which Asterisk is not)
 between the two 
 boxes in order to separate the two signaling channels.
 However you do not need two point-codes for this setup, but
 simply to 
 define two groups of channels ... from the example in my
 previous email, 
 change the linkset definitions to:
 
 linkset=1
 networkindicator=national
 group=1
 context=From_Span1
 pointcode=1
 defaultdpc=2
 adjpointcode=2
 cicbeginswith=1
 channel => 1-15
 group=2
 context=From_Span2
 cicbeginswith=17
 channel => 17-31
 sigchan=16
 
 #include ss7.timers
 
 linkset=2
 networkindicator=national
 group=3
 context=From_Span3
 pointcode=2
 defaultdpc=1
 adjpointcode=1
 cicbeginswith=1
 channel => 32-46
 group=4
 context=From_Span4
 cicbeginswith=17
 channel => 48-62
 sigchan=47
 
 #include ss7.timers
 
 
 Now you have 4 groups on the same 2 linksets, which is equal
 of having 
 two separate linksets on the same signalling link.
 
 
 On 2016-03-21 07:40, Mehdi Shirazi wrote:
 > Hi
 > I connected 2 asterisk server with libss7 together to
 simulate real 
 > scenario.
 > There is one signaling link between .
 > Asterisk one has one opc11 but Asterisk two have two
 opc2_1 and opc2_2.
 > There is 2 spans between , and I want to first spans
 use opc2_1 and
 > second span use opc2_2.
 > For setting Asterisk one there is no problem , in same
 linkset I can
 > add new defaultdpc=3
 > and new channels and new CICs. but in second server how
 I can add CICs
 > ,here I should separate
 > add CICs based on pointcode (opc2_1 and opc2_2) but it
 seems one link
 > set just accept one point code.
 > 
 > If I want to add linkset with new pointcode(opc) with
 same signaling
 > channel it is not possible.
 > 
 > how I can have one signaling link but multiple
 originate point code in
 > different channel groups  ?
 > 
 > Regards
 > M.Shirazi