/* * Copyright (C) 1996-2017 The Squid Software Foundation and contributors * * Squid software is distributed under GPLv2+ license and includes * contributions from numerous individuals and organizations. * Please see the COPYING and CONTRIBUTORS files for details. */ /* DEBUG: section 54 Interprocess Communication */ #include "squid.h" #include "comm.h" #include "comm/Connection.h" #include "comm/Read.h" #include "CommCalls.h" #include "ipc/Port.h" #include "tools.h" static const char channelPathPfx[] = DEFAULT_STATEDIR "/"; static const char coordinatorAddrLabel[] = "-coordinator"; const char Ipc::strandAddrLabel[] = "-kid"; Ipc::Port::Port(const String& aListenAddr): UdsOp(aListenAddr) { setOptions(COMM_NONBLOCKING | COMM_DOBIND); } void Ipc::Port::start() { UdsOp::start(); doListen(); } void Ipc::Port::doListen() { debugs(54, 6, HERE); buf.prepForReading(); typedef CommCbMemFunT Dialer; AsyncCall::Pointer readHandler = JobCallback(54, 6, Dialer, this, Port::noteRead); comm_read(conn(), buf.raw(), buf.size(), readHandler); } bool Ipc::Port::doneAll() const { return false; // listen forever } String Ipc::Port::MakeAddr(const char* processLabel, int id) { assert(id >= 0); String addr = channelPathPfx; addr.append(service_name.c_str()); addr.append(processLabel); addr.append('-'); addr.append(xitoa(id)); addr.append(".ipc"); return addr; } String Ipc::Port::CoordinatorAddr() { static String coordinatorAddr; if (!coordinatorAddr.size()) { coordinatorAddr= channelPathPfx; coordinatorAddr.append(service_name.c_str()); coordinatorAddr.append(coordinatorAddrLabel); coordinatorAddr.append(".ipc"); } return coordinatorAddr; } void Ipc::Port::noteRead(const CommIoCbParams& params) { debugs(54, 6, HERE << params.conn << " flag " << params.flag << " [" << this << ']'); if (params.flag == Comm::OK) { assert(params.buf == buf.raw()); receive(buf); } // TODO: if there was a fatal error on our socket, close the socket before // trying to listen again and print a level-1 error message. doListen(); }