5d8ff98ac0
git-svn-id: http://yate.null.ro/svn/yate/trunk@2812 acf43c95-373e-0410-b603-e72c3f656dc1
712 lines
21 KiB
C++
712 lines
21 KiB
C++
/**
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* layer3.cpp
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* This file is part of the YATE Project http://YATE.null.ro
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*
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* Yet Another Signalling Stack - implements the support for SS7, ISDN and PSTN
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*
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* Yet Another Telephony Engine - a fully featured software PBX and IVR
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* Copyright (C) 2004-2006 Null Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "yatesig.h"
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#include <yatephone.h>
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#include <stdlib.h>
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using namespace TelEngine;
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static const TokenDict s_dict_control[] = {
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{ "pause", SS7MTP3::Pause },
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{ "resume", SS7MTP3::Resume },
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{ 0, 0 }
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};
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typedef GenPointer<SS7Layer2> L2Pointer;
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void SS7L3User::notify(SS7Layer3* network, int sls)
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{
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Debug(this,DebugStub,"Please implement SS7L3User::notify(%p,%d) [%p]",network,sls,this);
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}
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// Attach a Layer 3 user component to this network
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void SS7Layer3::attach(SS7L3User* l3user)
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{
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Lock lock(m_l3userMutex);
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if (m_l3user == l3user)
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return;
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SS7L3User* tmp = m_l3user;
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m_l3user = l3user;
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lock.drop();
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if (tmp) {
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const char* name = 0;
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if (engine() && engine()->find(tmp)) {
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name = tmp->toString().safe();
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if (tmp->getObject("SS7Router"))
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(static_cast<SS7Router*>(tmp))->detach(this);
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else
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tmp->attach(0);
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}
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Debug(this,DebugAll,"Detached L3 user (%p,'%s') [%p]",tmp,name,this);
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}
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if (!l3user)
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return;
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Debug(this,DebugAll,"Attached L3 user (%p,'%s') [%p]",l3user,l3user->toString().safe(),this);
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insert(l3user);
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if (l3user->getObject("SS7Router"))
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(static_cast<SS7Router*>(l3user))->attach(this);
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else
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l3user->attach(this);
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}
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SS7PointCode::Type SS7Layer3::type(unsigned char netType) const
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{
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if (netType & 0xc0)
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netType >>= 6;
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return m_cpType[netType & 0x03];
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}
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void SS7Layer3::setType(SS7PointCode::Type type, unsigned char netType)
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{
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if (netType & 0xc0)
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netType >>= 6;
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m_cpType[netType & 0x03] = type;
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}
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void SS7Layer3::setType(SS7PointCode::Type type)
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{
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m_cpType[3] = m_cpType[2] = m_cpType[1] = m_cpType[0] = type;
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}
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// Build the list of destination point codes and set the routing priority
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bool SS7Layer3::buildRoutes(const NamedList& params)
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{
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Lock lock(m_routeMutex);
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for (unsigned int i = 0; i < YSS7_PCTYPE_COUNT; i++)
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m_route[i].clear();
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unsigned int n = params.length();
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const char* param = "route";
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bool added = false;
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for (unsigned int i= 0; i < n; i++) {
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NamedString* ns = params.getParam(i);
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if (!(ns && ns->name() == param))
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continue;
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// Get & check the route
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ObjList* route = ns->split(',',true);
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ObjList* obj = route->skipNull();
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SS7PointCode* pc = new SS7PointCode(0,0,0);
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SS7PointCode::Type type = SS7PointCode::Other;
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unsigned int prio = 0;
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while (true) {
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if (!obj)
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break;
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type = SS7PointCode::lookup(obj->get()->toString());
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obj = obj->skipNext();
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if (!(obj && pc->assign(obj->get()->toString(),type)))
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break;
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obj = obj->skipNext();
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if (obj)
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prio = obj->get()->toString().toInteger(0);
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break;
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}
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TelEngine::destruct(route);
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unsigned int packed = pc->pack(type);
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TelEngine::destruct(pc);
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if ((unsigned int)type > YSS7_PCTYPE_COUNT || !packed) {
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Debug(this,DebugNote,"Invalid %s='%s' (invalid point code%s) [%p]",
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param,ns->safe(),type == SS7PointCode::Other ? " type" : "",this);
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continue;
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}
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if (findRoute(type,packed))
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continue;
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added = true;
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m_route[(unsigned int)type - 1].append(new SS7Route(packed,prio));
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DDebug(this,DebugAll,"Added route '%s'",ns->c_str());
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}
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if (!added)
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Debug(this,DebugMild,"No outgoing routes [%p]",this);
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else
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printRoutes();
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return added;
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}
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// Get the priority of a route.
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unsigned int SS7Layer3::getRoutePriority(SS7PointCode::Type type, unsigned int packedPC)
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{
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if (type == SS7PointCode::Other || (unsigned int)type > YSS7_PCTYPE_COUNT)
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return (unsigned int)-1;
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Lock lock(m_routeMutex);
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SS7Route* route = findRoute(type,packedPC);
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if (route)
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return route->m_priority;
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return (unsigned int)-1;
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}
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bool SS7Layer3::maintenance(const SS7MSU& msu, const SS7Label& label, int sls)
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{
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if (msu.getSIF() != SS7MSU::MTN)
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return false;
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XDebug(this,DebugStub,"Possibly incomplete SS7Layer3::maintenance(%p,%p,%d) [%p]",
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&msu,&label,sls,this);
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// Q.707 says test pattern length should be 1-15 but we accept 0 as well
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const unsigned char* s = msu.getData(label.length()+1,2);
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if (!s)
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return false;
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unsigned char len = s[1] >> 4;
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// get a pointer to the test pattern
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const unsigned char* t = msu.getData(label.length()+3,len);
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if (!t) {
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Debug(this,DebugMild,"Received MTN type %02X length %u with invalid pattern length %u [%p]",
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s[0],msu.length(),len,this);
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return false;
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}
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switch (s[0]) {
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case SS7MsgMTN::SLTM:
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{
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Debug(this,DebugAll,"Received SLTM with test pattern length %u",len);
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SS7Label lbl(label,sls,0);
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SS7MSU answer(msu.getSIO(),lbl,0,len+2);
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unsigned char* d = answer.getData(lbl.length()+1,len+2);
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if (!d)
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return false;
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*d++ = 0x21;
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*d++ = len << 4;
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while (len--)
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*d++ = *t++;
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return transmitMSU(answer,lbl,sls) >= 0;
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}
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return true;
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case SS7MsgMTN::SLTA:
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Debug(this,DebugAll,"Received SLTA with test pattern length %u",len);
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return true;
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}
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Debug(this,DebugMild,"Received MTN type %02X, length %u [%p]",
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s[0],msu.length(),this);
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return false;
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}
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bool SS7Layer3::management(const SS7MSU& msu, const SS7Label& label, int sls)
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{
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if (msu.getSIF() != SS7MSU::SNM)
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return false;
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Debug(this,DebugStub,"Please implement SS7Layer3::management(%p,%p,%d) [%p]",
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&msu,&label,sls,this);
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// according to Q.704 there should be at least the heading codes (8 bit)
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const unsigned char* s = msu.getData(label.length()+1,1);
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if (!s)
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return false;
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// TODO: implement
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return false;
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}
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bool SS7Layer3::unavailable(const SS7MSU& msu, const SS7Label& label, int sls, unsigned char cause)
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{
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DDebug(this,DebugInfo,"SS7Layer3::unavailable(%p,%p,%d,%d) [%p]",
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&msu,&label,sls,cause,this);
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#ifdef DEBUG
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String s;
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s.hexify(msu.data(),msu.length(),' ');
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Debug(this,DebugMild,"Unhandled MSU len=%u Serv: %s, Prio: %s, Net: %s, Data: %s",
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msu.length(),msu.getServiceName(),msu.getPriorityName(),
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msu.getIndicatorName(),s.c_str());
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#endif
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if (msu.getSIF() == SS7MSU::SNM)
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return false;
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// send a SNM UPU (User Part Unavailable, Q.704 15.17.2)
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unsigned char llen = SS7PointCode::length(label.type());
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SS7Label lbl(label,sls,0);
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SS7MSU answer(SS7MSU::SNM,msu.getSSF(),lbl,0,llen+2);
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unsigned char* d = answer.getData(lbl.length()+1,llen+2);
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if (!d)
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return false;
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d[0] = SS7MsgSNM::UPU;
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label.dpc().store(label.type(),d+1);
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d[llen+1] = msu.getSIF() | ((cause & 0x0f) << 4);
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return transmitMSU(answer,lbl,sls) >= 0;
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}
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// Find a route having the specified point code type and packed point code
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SS7Route* SS7Layer3::findRoute(SS7PointCode::Type type, unsigned int packed)
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{
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if ((unsigned int)type == 0)
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return 0;
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unsigned int index = (unsigned int)type - 1;
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if (index >= YSS7_PCTYPE_COUNT)
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return 0;
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Lock lock(m_routeMutex);
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for (ObjList* o = m_route[index].skipNull(); o; o = o->skipNext()) {
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SS7Route* route = static_cast<SS7Route*>(o->get());
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XDebug(this,DebugAll,"findRoute type=%s packed=%u. Check %u [%p]",
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SS7PointCode::lookup(type),packed,route->m_packed,this);
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if (route->m_packed == packed)
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return route;
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}
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return 0;
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}
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// Add a network to the routing table. Clear all its routes before appending it to the table
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void SS7Layer3::updateRoutes(SS7Layer3* network)
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{
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if (!network)
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return;
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Lock lock(m_routeMutex);
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removeRoutes(network);
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for (unsigned int i = 0; i < YSS7_PCTYPE_COUNT; i++) {
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SS7PointCode::Type type = (SS7PointCode::Type)(i + 1);
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for (ObjList* o = network->m_route[i].skipNull(); o; o = o->skipNext()) {
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SS7Route* src = static_cast<SS7Route*>(o->get());
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SS7Route* dest = findRoute(type,src->m_packed);
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if (!dest) {
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dest = new SS7Route(src->m_packed);
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m_route[i].append(dest);
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}
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DDebug(this,DebugAll,"Add route type=%s packed=%u for network (%p,'%s') [%p]",
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SS7PointCode::lookup(type),src->m_packed,network,network->toString().safe(),this);
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dest->attach(network,type);
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}
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}
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}
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// Remove the given network from all destinations in the routing table.
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// Remove the entry in the routing table if empty (no more routes to the point code).
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void SS7Layer3::removeRoutes(SS7Layer3* network)
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{
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if (!network)
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return;
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Lock lock(m_routeMutex);
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for (unsigned int i = 0; i < YSS7_PCTYPE_COUNT; i++) {
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ListIterator iter(m_route[i]);
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while (true) {
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SS7Route* route = static_cast<SS7Route*>(iter.get());
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if (!route)
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break;
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if (!route->detach(network)) {
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DDebug(this,DebugAll,"Removing empty route type=%s packed=%u [%p]",
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SS7PointCode::lookup((SS7PointCode::Type)(i+1)),route->m_packed,this);
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m_route[i].remove(route,true);
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}
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}
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}
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DDebug(this,DebugAll,"Removed network (%p,'%s') from routing table [%p]",
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network,network->toString().safe(),this);
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}
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void SS7Layer3::printRoutes()
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{
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String s;
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bool router = getObject("SS7Router") != 0;
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for (unsigned int i = 0; i < YSS7_PCTYPE_COUNT; i++) {
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ObjList* o = m_route[i].skipNull();
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if (!o)
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continue;
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SS7PointCode::Type type = (SS7PointCode::Type)(i + 1);
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String tmp;
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String sType = SS7PointCode::lookup(type);
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sType << String(' ',(unsigned int)(8 - sType.length()));
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for (; o; o = o->skipNext()) {
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SS7Route* route = static_cast<SS7Route*>(o->get());
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SS7PointCode pc(type,route->m_packed);
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tmp << sType << pc;
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if (!router) {
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tmp << " " << route->m_priority << "\r\n";
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continue;
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}
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for (ObjList* oo = route->m_networks.skipNull(); oo; oo = oo->skipNext()) {
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GenPointer<SS7Layer3>* d = static_cast<GenPointer<SS7Layer3>*>(oo->get());
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if (*d)
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tmp << " '" << (*d)->toString() << "'=" << (*d)->getRoutePriority(type,route->m_packed);
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}
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tmp << "\r\n";
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}
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s << tmp;
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}
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if (s) {
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s = s.substr(0,s.length() - 2);
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Debug(this,DebugAll,"%s: [%p]\r\n%s",router?"Routing table":"Destinations",this,s.c_str());
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}
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else
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Debug(this,DebugAll,"No %s [%p]",router?"routes":"destinations",this);
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}
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SS7MTP3::SS7MTP3(const NamedList& params)
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: SignallingComponent(params.safe("SS7MTP3"),¶ms),
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SignallingDumpable(SignallingDumper::Mtp3),
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Mutex(true,"SS7MTP3"),
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m_total(0), m_active(0), m_inhibit(false)
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{
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#ifdef DEBUG
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if (debugAt(DebugAll)) {
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String tmp;
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params.dump(tmp,"\r\n ",'\'',true);
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Debug(this,DebugAll,"SS7MTP3::SS7MTP3(%p) [%p]%s",
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¶ms,this,tmp.c_str());
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}
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#endif
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// Set point code type for each network indicator
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static const unsigned char ni[4] = { SS7MSU::International,
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SS7MSU::SpareInternational, SS7MSU::National, SS7MSU::ReservedNational };
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String stype = params.getValue("netind2pctype");
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int level = DebugAll;
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if (stype.find(',') >= 0) {
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ObjList* obj = stype.split(',',false);
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ObjList* o = obj->skipNull();
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for (unsigned int i = 0; i < 4; i++) {
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String* s = 0;
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if (o) {
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s = static_cast<String*>(o->get());
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o = o->skipNext();
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}
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SS7PointCode::Type type = SS7PointCode::lookup(s?s->c_str():0);
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if (type == SS7PointCode::Other)
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level = DebugNote;
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setType(type,ni[i]);
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}
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TelEngine::destruct(obj);
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}
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else {
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SS7PointCode::Type type = SS7PointCode::lookup(stype.c_str());
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if (type == SS7PointCode::Other)
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level = DebugNote;
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for (unsigned int i = 0; i < 4; i++)
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setType(type,ni[i]);
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}
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Debug(this,level,"Point code types are '%s' [%p]",stype.safe(),this);
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m_inhibit = !params.getBoolValue("autostart",true);
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buildRoutes(params);
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setDumper(params.getValue("layer3dump"));
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}
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SS7MTP3::~SS7MTP3()
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{
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setDumper();
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}
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unsigned int SS7MTP3::countLinks()
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{
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unsigned int total = 0;
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unsigned int active = 0;
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ObjList* l = &m_links;
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for (; l; l = l->next()) {
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L2Pointer* p = static_cast<L2Pointer*>(l->get());
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if (!(p && *p))
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continue;
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total++;
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if ((*p)->operational())
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active++;
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}
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m_total = total;
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m_active = active;
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return active;
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}
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bool SS7MTP3::operational(int sls) const
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{
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if (m_inhibit)
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return false;
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if (sls < 0)
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return (m_active != 0);
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const ObjList* l = &m_links;
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for (; l; l = l->next()) {
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L2Pointer* p = static_cast<L2Pointer*>(l->get());
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if (!(p && *p))
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continue;
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if ((*p)->sls() == sls)
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return (*p)->operational();
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}
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return false;
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}
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// Attach a link in the first free SLS
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void SS7MTP3::attach(SS7Layer2* link)
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{
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if (!link)
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return;
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SignallingComponent::insert(link);
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Lock lock(this);
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// Check if already attached
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for (ObjList* o = m_links.skipNull(); o; o = o->skipNext()) {
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L2Pointer* p = static_cast<L2Pointer*>(o->get());
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if (*p == link) {
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link->attach(this);
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return;
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}
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}
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// Attach in the first free SLS
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int sls = 0;
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ObjList* before = m_links.skipNull();
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for (; before; before = before->skipNext()) {
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L2Pointer* p = static_cast<L2Pointer*>(before->get());
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if (!*p)
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continue;
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if (sls < (*p)->sls())
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break;
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sls++;
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}
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link->sls(sls);
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if (!before)
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m_links.append(new L2Pointer(link));
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else
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before->insert(new L2Pointer(link));
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Debug(this,DebugAll,"Attached link (%p,'%s') with SLS=%d [%p]",
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link,link->toString().safe(),link->sls(),this);
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countLinks();
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link->attach(this);
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}
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|
|
// Detach a link. Remove its L2 user
|
|
void SS7MTP3::detach(SS7Layer2* link)
|
|
{
|
|
if (!link)
|
|
return;
|
|
Lock lock(this);
|
|
for (ObjList* o = m_links.skipNull(); o; o = o->skipNext()) {
|
|
L2Pointer* p = static_cast<L2Pointer*>(o->get());
|
|
if (*p != link)
|
|
continue;
|
|
m_links.remove(p,false);
|
|
Debug(this,DebugAll,"Detached link (%p,'%s') with SLS=%d [%p]",
|
|
link,link->toString().safe(),link->sls(),this);
|
|
link->attach(0);
|
|
countLinks();
|
|
return;
|
|
}
|
|
}
|
|
|
|
bool SS7MTP3::control(Operation oper, NamedList* params)
|
|
{
|
|
bool ok = operational();
|
|
switch (oper) {
|
|
case Pause:
|
|
if (!m_inhibit) {
|
|
m_inhibit = true;
|
|
if (ok)
|
|
SS7Layer3::notify(-1);
|
|
}
|
|
return true;
|
|
case Resume:
|
|
if (m_inhibit) {
|
|
m_inhibit = false;
|
|
if (ok != operational())
|
|
SS7Layer3::notify(-1);
|
|
}
|
|
return true;
|
|
case Status:
|
|
return ok;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool SS7MTP3::control(NamedList& params)
|
|
{
|
|
String* ret = params.getParam("completion");
|
|
const String* oper = params.getParam("operation");
|
|
const char* cmp = params.getValue("component");
|
|
int cmd = oper ? oper->toInteger(s_dict_control,-1) : -1;
|
|
if (ret) {
|
|
if (oper && (cmd < 0))
|
|
return false;
|
|
String part = params.getValue("partword");
|
|
if (cmp) {
|
|
if (toString() != cmp)
|
|
return false;
|
|
for (const TokenDict* d = s_dict_control; d->token; d++)
|
|
Module::itemComplete(*ret,d->token,part);
|
|
return true;
|
|
}
|
|
return Module::itemComplete(*ret,toString(),part);
|
|
}
|
|
if (!(cmp && toString() == cmp))
|
|
return false;
|
|
if (cmd >= 0)
|
|
return control((Operation)cmd,¶ms);
|
|
return SignallingDumpable::control(params,this);
|
|
}
|
|
|
|
// Configure and initialize MTP3 and its links
|
|
bool SS7MTP3::initialize(const NamedList* config)
|
|
{
|
|
#ifdef DEBUG
|
|
String tmp;
|
|
if (config && debugAt(DebugAll))
|
|
config->dump(tmp,"\r\n ",'\'',true);
|
|
Debug(this,DebugInfo,"SS7MTP3::initialize(%p) [%p]%s",config,this,tmp.c_str());
|
|
#endif
|
|
if (config)
|
|
debugLevel(config->getIntValue("debuglevel_mtp3",
|
|
config->getIntValue("debuglevel",-1)));
|
|
countLinks();
|
|
if (config && (0 == m_total)) {
|
|
unsigned int n = config->length();
|
|
for (unsigned int i = 0; i < n; i++) {
|
|
NamedString* param = config->getParam(i);
|
|
if (!(param && param->name() == "link"))
|
|
continue;
|
|
NamedPointer* ptr = YOBJECT(NamedPointer,param);
|
|
NamedList* linkConfig = ptr ? YOBJECT(NamedList,ptr->userData()) : 0;
|
|
NamedList params(param->c_str());
|
|
params.addParam("basename",*param);
|
|
if (linkConfig)
|
|
params.copyParams(*linkConfig);
|
|
else {
|
|
params.copySubParams(*config,params + ".");
|
|
linkConfig = ¶ms;
|
|
}
|
|
SS7Layer2* link = YSIGCREATE(SS7Layer2,¶ms);
|
|
if (!link)
|
|
continue;
|
|
attach(link);
|
|
if (!link->initialize(linkConfig)) {
|
|
detach(link);
|
|
TelEngine::destruct(link);
|
|
}
|
|
}
|
|
m_inhibit = !config->getBoolValue("autostart",true);
|
|
}
|
|
if (engine() && !user()) {
|
|
NamedList params("ss7router");
|
|
if (config)
|
|
static_cast<String&>(params) = config->getValue("router",params);
|
|
if (params.toBoolean(true))
|
|
SS7Layer3::attach(YOBJECT(SS7Router,engine()->build("SS7Router",params,true)));
|
|
}
|
|
return 0 != m_total;
|
|
}
|
|
|
|
// Detach all links and user. Destroys the object, disposes the memory
|
|
void SS7MTP3::destroyed()
|
|
{
|
|
lock();
|
|
ListIterator iter(m_links);
|
|
for (GenObject* o = 0; 0 != (o = iter.get());) {
|
|
L2Pointer* p = static_cast<L2Pointer*>(o);
|
|
detach(*p);
|
|
}
|
|
SS7Layer3::attach(0);
|
|
unlock();
|
|
SS7Layer3::destroyed();
|
|
}
|
|
|
|
int SS7MTP3::transmitMSU(const SS7MSU& msu, const SS7Label& label, int sls)
|
|
{
|
|
Lock lock(this);
|
|
if (!m_active) {
|
|
Debug(this,DebugMild,"Could not transmit MSU, %s [%p]",
|
|
m_total ? "all links are down" : "no data links attached",this);
|
|
return -1;
|
|
}
|
|
|
|
// Try to find a link with the given SLS
|
|
ObjList* l = (sls >= 0) ? &m_links : 0;
|
|
for (; l; l = l->next()) {
|
|
L2Pointer* p = static_cast<L2Pointer*>(l->get());
|
|
if (!(p && *p))
|
|
continue;
|
|
SS7Layer2* link = *p;
|
|
if (link->sls() == sls) {
|
|
XDebug(this,DebugAll,"Found link %p for SLS=%d [%p]",link,sls,this);
|
|
if (link->operational()) {
|
|
if (link->transmitMSU(msu)) {
|
|
DDebug(this,DebugAll,"Sent MSU over link %p with SLS=%d%s [%p]",
|
|
link,sls,(m_inhibit ? " while inhibited" : ""),this);
|
|
dump(msu,true,sls);
|
|
return sls;
|
|
}
|
|
return -1;
|
|
}
|
|
// found link but is down - reroute
|
|
Debug(this,DebugMild,"Rerouting MSU for SLS=%d, link is down",sls);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Link not found or not operational: choose another one
|
|
for (l = m_links.skipNull(); l; l = l->skipNext()) {
|
|
L2Pointer* p = static_cast<L2Pointer*>(l->get());
|
|
if (!*p)
|
|
continue;
|
|
SS7Layer2* link = *p;
|
|
if (link->operational() && link->transmitMSU(msu)) {
|
|
sls = link->sls();
|
|
DDebug(this,DebugAll,"Sent MSU over link %p with SLS=%d%s [%p]",
|
|
link,sls,(m_inhibit ? " while inhibited" : ""),this);
|
|
dump(msu,true,sls);
|
|
return sls;
|
|
}
|
|
}
|
|
|
|
Debug(this,DebugWarn,"Could not find any link to send MSU [%p]",this);
|
|
return -1;
|
|
}
|
|
|
|
bool SS7MTP3::receivedMSU(const SS7MSU& msu, SS7Layer2* link, int sls)
|
|
{
|
|
dump(msu,false,sls);
|
|
int netType = msu.getNI();
|
|
SS7PointCode::Type cpType = type(netType);
|
|
unsigned int llen = SS7Label::length(cpType);
|
|
if (!llen) {
|
|
Debug(toString(),DebugWarn,"Received MSU but point code type is unconfigured [%p]",this);
|
|
return false;
|
|
}
|
|
// check MSU length against SIO + label length
|
|
if (msu.length() <= llen) {
|
|
Debug(this,DebugMild,"Received short MSU of length %u [%p]",
|
|
msu.length(),this);
|
|
return false;
|
|
}
|
|
SS7Label label(cpType,msu);
|
|
#ifdef DEBUG
|
|
if (debugAt(DebugInfo)) {
|
|
String tmp;
|
|
tmp << label << " (" << label.opc().pack(cpType) << ":" << label.dpc().pack(cpType) << ":" << label.sls() << ")";
|
|
Debug(this,DebugAll,"Received MSU from link %p with SLS=%d. Address: %s",
|
|
link,sls,tmp.c_str());
|
|
}
|
|
#endif
|
|
// first try to call the user part
|
|
if (SS7Layer3::receivedMSU(msu,label,sls))
|
|
return true;
|
|
// then try to minimally process MTN and SNM MSUs
|
|
if (maintenance(msu,label,sls) || management(msu,label,sls))
|
|
return true;
|
|
// if nothing worked, report the unavailable user part
|
|
return unavailable(msu,label,sls);
|
|
}
|
|
|
|
void SS7MTP3::notify(SS7Layer2* link)
|
|
{
|
|
Lock lock(this);
|
|
bool ok = operational();
|
|
countLinks();
|
|
#ifdef DEBUG
|
|
String tmp;
|
|
if (link)
|
|
tmp << "Link '" << link->toString() << "' is " << (link->operational()?"":"not ") << "operational. ";
|
|
Debug(this,DebugInfo,"%sLinkset has %u/%u active links [%p]",tmp.null()?"":tmp.c_str(),m_active,m_total,this);
|
|
#endif
|
|
// if operational status changed notify upper layer
|
|
if (ok != operational()) {
|
|
Debug(this,DebugNote,"Linkset is%s operational [%p]",
|
|
(operational() ? "" : " not"),this);
|
|
SS7Layer3::notify(link ? link->sls() : -1);
|
|
}
|
|
}
|
|
|
|
/* vi: set ts=8 sw=4 sts=4 noet: */
|