/** Processes the recvbuf and places the results in sendbuf * * @param[in] peerinfo - The remote address the message was received from. * @param[in] localaddr - The local address the message was received on. * @param[in] recvbuf - The message to process. * @param[out] sendbuf - The address of storage for the results of the * processed message. * @param[out] sendlist - if non-0, this function will prune the message * with the processed xid from the sendlist. * * @return Zero on success if @p sendbuf contains a response to send, * or a non-zero value if @p sendbuf does not contain a response * to send. */ int SLPDProcessMessage(struct sockaddr_storage * peerinfo, struct sockaddr_storage * localaddr, SLPBuffer recvbuf, SLPBuffer * sendbuf, SLPList * psendlist) { SLPHeader header; SLPMessage * message = 0; int errorcode = 0; #ifdef DEBUG char addr_str[INET6_ADDRSTRLEN]; #endif SLPDLogMessage(SLPDLOG_TRACEMSG_IN, peerinfo, localaddr, recvbuf); /* set the sendbuf empty */ if (*sendbuf) (*sendbuf)->end = (*sendbuf)->start; /* zero out the header before parsing it */ memset(&header, 0, sizeof(header)); /* Parse just the message header */ recvbuf->curpos = recvbuf->start; errorcode = SLPMessageParseHeader(recvbuf, &header); /* Reset the buffer "curpos" pointer so that full message can be parsed later */ recvbuf->curpos = recvbuf->start; #if defined(ENABLE_SLPv1) /* if version == 1 and the header was correct then parse message as a version 1 message */ if ((errorcode == 0) && (header.version == 1)) errorcode = SLPDv1ProcessMessage(peerinfo, recvbuf, sendbuf); else #endif if (errorcode == 0) { /* TRICKY: Duplicate SRVREG recvbufs *before* parsing them * we do this because we are going to keep track of in the * registration database. */ if (header.functionid == SLP_FUNCT_SRVREG || header.functionid == SLP_FUNCT_DAADVERT) { recvbuf = SLPBufferDup(recvbuf); if (recvbuf == 0) return SLP_ERROR_INTERNAL_ERROR; } /* Allocate the message descriptor */ message = SLPMessageAlloc(); if (message) { /* Parse the message and fill out the message descriptor */ errorcode = SLPMessageParseBuffer(peerinfo, localaddr, recvbuf, message); if (errorcode == 0) { /* Process messages based on type */ switch (message->header.functionid) { case SLP_FUNCT_SRVRQST: errorcode = ProcessSrvRqst(message, sendbuf, errorcode); break; case SLP_FUNCT_SRVREG: errorcode = ProcessSrvReg(message, recvbuf, sendbuf, errorcode); if (errorcode == 0) SLPDKnownDAEcho(message, recvbuf); break; case SLP_FUNCT_SRVDEREG: errorcode = ProcessSrvDeReg(message, sendbuf, errorcode); if (errorcode == 0) SLPDKnownDAEcho(message, recvbuf); break; case SLP_FUNCT_SRVACK: errorcode = ProcessSrvAck(message, sendbuf, errorcode); break; case SLP_FUNCT_ATTRRQST: errorcode = ProcessAttrRqst(message, sendbuf, errorcode); break; case SLP_FUNCT_DAADVERT: errorcode = ProcessDAAdvert(message, recvbuf, sendbuf, errorcode); break; case SLP_FUNCT_SRVTYPERQST: errorcode = ProcessSrvTypeRqst(message, sendbuf, errorcode); break; case SLP_FUNCT_SAADVERT: errorcode = ProcessSAAdvert(message, sendbuf, errorcode); break; default: /* Should never happen... but we're paranoid */ errorcode = SLP_ERROR_PARSE_ERROR; break; } } else SLPDLogParseWarning(peerinfo, recvbuf); /*If there was a send list, prune the xid, since the request has been processed*/ if(psendlist) { SLPHeader bufhead; SLPBuffer pnext; SLPBuffer pbuf = (SLPBuffer) psendlist->head; while(pbuf) { pnext = (SLPBuffer) pbuf->listitem.next; if((0 == SLPMessageParseHeader(pbuf, &bufhead)) && (bufhead.xid == header.xid)) SLPBufferFree((SLPBuffer)SLPListUnlink(psendlist, (SLPListItem*)pbuf)); else pbuf->curpos = pbuf->start; /*We parsed the buffer enough to attempt the xid check, we need to reset it for the next parse*/ pbuf = pnext; } } if (header.functionid == SLP_FUNCT_SRVREG || header.functionid == SLP_FUNCT_DAADVERT) { /* TRICKY: If this is a reg or daadvert message we do not free * the message descriptor or duplicated recvbuf because they are * being kept in the database! */ if (errorcode == 0) goto FINISHED; /* TRICKY: If there is an error we need to free the * duplicated recvbuf */ SLPBufferFree(recvbuf); } SLPMessageFree(message); } else errorcode = SLP_ERROR_INTERNAL_ERROR; /* out of memory */ } else SLPDLogParseWarning(peerinfo,recvbuf); FINISHED: #ifdef DEBUG if (errorcode) SLPDLog("\n*** DEBUG *** errorcode %i during processing " "of message from %s\n", errorcode, SLPNetSockAddrStorageToString( peerinfo, addr_str, sizeof(addr_str))); #endif /* Log message silently ignored because of an error */ if (errorcode) if (*sendbuf == 0 || (*sendbuf)->end == (*sendbuf)->start) SLPDLogMessage(SLPDLOG_TRACEDROP,peerinfo,localaddr,recvbuf); /* Log trace message */ SLPDLogMessage(SLPDLOG_TRACEMSG_OUT, peerinfo, localaddr, *sendbuf); return errorcode; }
/*=========================================================================*/ int SLPDProcessMessage(struct sockaddr_in* peerinfo, SLPBuffer recvbuf, SLPBuffer* sendbuf) /* Processes the recvbuf and places the results in sendbuf */ /* */ /* recvfd - the socket the message was received on */ /* */ /* recvbuf - message to process */ /* */ /* sendbuf - results of the processed message */ /* */ /* Returns - zero on success SLP_ERROR_PARSE_ERROR or */ /* SLP_ERROR_INTERNAL_ERROR on ENOMEM. */ /*=========================================================================*/ { SLPMessage message = 0; int errorcode = 0; message = SLPMessageAlloc(); if(message == 0) { return SLP_ERROR_INTERNAL_ERROR; } errorcode = SLPMessageParseBuffer(recvbuf, message); #if defined(ENABLE_SLPv1) if(message->header.version == 1) return SLPDv1ProcessMessage(peerinfo, recvbuf, sendbuf, message, errorcode); #endif /* Log trace message */ SLPDLogTraceMsg("IN",peerinfo,recvbuf); switch(message->header.functionid) { case SLP_FUNCT_SRVRQST: errorcode = ProcessSrvRqst(peerinfo, message, sendbuf, errorcode); break; case SLP_FUNCT_SRVREG: errorcode = ProcessSrvReg(peerinfo, message,sendbuf, errorcode); if(errorcode == 0) { SLPDKnownDAEcho(peerinfo, message, recvbuf); } break; case SLP_FUNCT_SRVDEREG: errorcode = ProcessSrvDeReg(peerinfo, message,sendbuf, errorcode); if(errorcode == 0) { SLPDKnownDAEcho(peerinfo, message, recvbuf); } break; case SLP_FUNCT_SRVACK: errorcode = ProcessSrvAck(peerinfo, message,sendbuf, errorcode); break; case SLP_FUNCT_ATTRRQST: errorcode = ProcessAttrRqst(peerinfo, message,sendbuf, errorcode); break; case SLP_FUNCT_DAADVERT: errorcode = ProcessDAAdvert(peerinfo, message, sendbuf, errorcode); /* If necessary log that we received a DAAdvert */ SLPDLogDATrafficMsg("IN", peerinfo, message); break; case SLP_FUNCT_SRVTYPERQST: errorcode = ProcessSrvTypeRqst(peerinfo, message, sendbuf, errorcode); break; case SLP_FUNCT_SAADVERT: errorcode = ProcessSAAdvert(peerinfo, message, sendbuf, errorcode); break; default: /* This may happen on a really early parse error or version not */ /* supported error */ /* TODO log errorcode here */ break; } /* Log traceMsg of message was received and the one that will be sent */ SLPDLogTraceMsg("OUT",peerinfo,*sendbuf); SLPMessageFree(message); /* Log reception of important errors */ switch(errorcode) { case SLP_ERROR_DA_BUSY_NOW: SLPLog("DA_BUSY from %s\n", inet_ntoa(peerinfo->sin_addr)); break; case SLP_ERROR_INTERNAL_ERROR: SLPLog("INTERNAL_ERROR from %s\n", inet_ntoa(peerinfo->sin_addr)); break; case SLP_ERROR_PARSE_ERROR: SLPLog("PARSE_ERROR from %s\n", inet_ntoa(peerinfo->sin_addr)); break; case SLP_ERROR_VER_NOT_SUPPORTED: SLPLog("VER_NOT_SUPPORTED from %s\n", inet_ntoa(peerinfo->sin_addr)); break; } return errorcode; }