/******************************************************************************/ /* */ /* X r d N e t M s g . c c */ /* */ /* (c) 2007 by the Board of Trustees of the Leland Stanford, Jr., University */ /* All Rights Reserved */ /* Produced by Andrew Hanushevsky for Stanford University under contract */ /* DE-AC02-76-SFO0515 with the Department of Energy */ /* */ /* This file is part of the XRootD software suite. */ /* */ /* XRootD is free software: you can redistribute it and/or modify it under */ /* the terms of the GNU Lesser General Public License as published by the */ /* Free Software Foundation, either version 3 of the License, or (at your */ /* option) any later version. */ /* */ /* XRootD is distributed in the hope that it will be useful, but WITHOUT */ /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */ /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */ /* License for more details. */ /* */ /* You should have received a copy of the GNU Lesser General Public License */ /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */ /* COPYING (GPL license). If not, see . */ /* */ /* The copyright holder's institutional names and contributor's names may not */ /* be used to endorse or promote products derived from this software without */ /* specific prior written permission of the institution or contributor. */ /******************************************************************************/ #include #include #include "XrdNet/XrdNet.hh" #include "XrdNet/XrdNetMsg.hh" #include "XrdNet/XrdNetOpts.hh" #include "XrdSys/XrdSysError.hh" #include "XrdSys/XrdSysPlatform.hh" /******************************************************************************/ /* C o n s t r u c t o r */ /******************************************************************************/ XrdNetMsg::XrdNetMsg(XrdSysError *erp, const char *dest, bool *aOK) { XrdNet myNet(erp); bool aok = true; eDest = erp; FD = -1; destOK = 0; if (dest) {const char *eText = dfltDest.Set(dest); if (!eText) destOK = 1; else {eDest->Emsg("Msg", "Default", dest, "is unreachable"); aok = false; } } if ((FD = myNet.Relay(dest)) < 0) {eDest->Emsg("Msg", "Unable to create UDP msg socket."); aok = false; } if (aOK) *aOK = aok; } /******************************************************************************/ /* S e n d */ /******************************************************************************/ int XrdNetMsg::Send(const char *Buff, int Blen, const char *dest, int tmo) { XrdNetAddr *theDest; int retc; if (!Blen && !(Blen = strlen(Buff))) return 0; if (!dest) {if (!destOK) {eDest->Emsg("Msg", "Destination not specified."); return -1;} theDest = &dfltDest; } else if (specDest.Set(dest)) {eDest->Emsg("Msg", dest, "is unreachable"); return -1;} else theDest = &specDest; if (tmo >= 0 && !OK2Send(tmo, dest)) return 1; do {retc = sendto(FD, (Sokdata_t)Buff, Blen, 0, theDest->SockAddr(), theDest->SockSize());} while (retc < 0 && errno == EINTR); return (retc < 0 ? retErr(errno, theDest) : 0); } /******************************************************************************/ int XrdNetMsg::Send(const struct iovec iov[], int iovcnt, const char *dest, int tmo) { char buff[4096], *bp = buff; int i, dsz = sizeof(buff); if (tmo >= 0 && !OK2Send(tmo, dest)) return 1; for (i = 0; i < iovcnt; i++) {dsz -= iov[i].iov_len; if (dsz < 0) return retErr(EMSGSIZE, dest); memcpy((void *)bp,(const void *)iov[i].iov_base,iov[i].iov_len); bp += iov[i].iov_len; } return Send(buff, (int)(bp-buff), dest, -1); } /******************************************************************************/ /* P r i v a t e M e t h o d s */ /******************************************************************************/ /******************************************************************************/ /* O K 2 S e n d */ /******************************************************************************/ int XrdNetMsg::OK2Send(int timeout, const char *dest) { struct pollfd polltab = {FD, POLLOUT|POLLWRNORM, 0}; int retc; do {retc = poll(&polltab, 1, timeout);} while(retc < 0 && errno == EINTR); if (retc == 0 || !(polltab.revents & (POLLOUT | POLLWRNORM))) eDest->Emsg("Msg", "UDP link to", dest, "is blocked."); else if (retc < 0) eDest->Emsg("Msg",errno,"poll", dest); else return 1; return 0; } /******************************************************************************/ /* r e t E r r */ /******************************************************************************/ int XrdNetMsg::retErr(int ecode, const char *theDest) { if (!theDest) {if (!destOK) {eDest->Emsg("Msg", "Destination not specified."); return -1;} theDest = dfltDest.Name("unknown"); } eDest->Emsg("Msg", ecode, "send to", theDest); return (EWOULDBLOCK == ecode || EAGAIN == ecode ? 1 : -1); } int XrdNetMsg::retErr(int ecode, XrdNetAddr *theDest) { return retErr(ecode, theDest->Name("unknown")); }