249 lines
6.3 KiB
C++
249 lines
6.3 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla IPC.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Darin Fisher <darin@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <string.h>
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#include "ipcm.h"
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#include "prlog.h"
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const nsID IPCM_TARGET =
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{ /* 753ca8ff-c8c2-4601-b115-8c2944da1150 */
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0x753ca8ff,
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0xc8c2,
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0x4601,
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{0xb1, 0x15, 0x8c, 0x29, 0x44, 0xda, 0x11, 0x50}
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};
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static const char IPCM_PING[] = { (char) IPCM_MSG_PING };
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static const PRUint32 IPCM_PING_LEN = sizeof(IPCM_PING);
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static const char IPCM_CNAME[] = { (char) IPCM_MSG_CNAME };
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static const PRUint32 IPCM_CNAME_LEN = sizeof(IPCM_CNAME);
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//
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// +--------------------+
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// | BYTE : msgType |
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// +--------------------+
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// | (variable) |
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// +--------------------+
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//
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int
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IPCM_GetMsgType(const ipcMessage *msg)
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{
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// make sure message topic matches
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if (msg->Target().Equals(IPCM_TARGET)) {
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// the type is encoded as the first byte
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char type = msg->Data()[0];
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if (type < IPCM_MSG_UNKNOWN)
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return type;
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}
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return IPCM_MSG_UNKNOWN;
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}
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//
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// PING message
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//
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// +----------------------+
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// | BYTE - IPCM_MSG_PING |
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// +----------------------+
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//
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const char ipcmMessagePING::MSG_TYPE = (char) IPCM_MSG_PING;
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ipcmMessagePING::ipcmMessagePING()
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{
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Init(IPCM_TARGET, &MSG_TYPE, 1);
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}
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//
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// CNAME message
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//
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// +-----------------------+
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// | BYTE - IPCM_MSG_CNAME |
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// +-----------------------+
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// | clientName |
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// +-----------------------+
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// | null |
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// +-----------------------+
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//
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const char ipcmMessageCNAME::MSG_TYPE = (char) IPCM_MSG_CNAME;
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ipcmMessageCNAME::ipcmMessageCNAME(const char *cName)
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{
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int cLen = strlen(cName);
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int dataLen = 1 + // msg_type
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cLen + // cName
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1; // null
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Init(IPCM_TARGET, NULL, dataLen);
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SetData(0, &MSG_TYPE, 1);
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SetData(1, cName, cLen + 1);
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}
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const char *
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ipcmMessageCNAME::ClientName() const
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{
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// make sure data is null terminated
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const char *data = Data();
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if (data[DataLen() - 1] != '\0')
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return NULL;
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return Data() + 1;
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}
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//
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// CENUM message
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//
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// +-----------------------+
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// | BYTE - IPCM_MSG_CENUM |
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// +-----------------------+
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//
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const char ipcmMessageCENUM::MSG_TYPE = (char) IPCM_MSG_CENUM;
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ipcmMessageCENUM::ipcmMessageCENUM()
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{
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Init(IPCM_TARGET, &MSG_TYPE, 1);
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}
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//
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// CLIST message
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//
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// +-----------------------+
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// | BYTE - IPCM_MSG_CLIST |
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// +-----------------------+
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// | cname[0] |
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// +-----------------------+
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// | null |
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// +-----------------------+
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// . .
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// . .
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// +-----------------------+
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// | cname[num - 1] |
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// +-----------------------+
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// | null |
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// +-----------------------+
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//
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const char ipcmMessageCLIST::MSG_TYPE = (char) IPCM_MSG_CLIST;
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ipcmMessageCLIST::ipcmMessageCLIST(const char *cNames[], PRUint32 num)
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{
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PRUint32 i, dataLen = 1;
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for (i = 0; i < num; ++i) {
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dataLen += strlen(cNames[i]);
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dataLen ++;
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}
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Init(IPCM_TARGET, NULL, dataLen);
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PRUint32 offset = 1;
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for (i = 0; i < num; ++i) {
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PRUint32 len = strlen(cNames[i]);
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SetData(offset, cNames[i], len + 1);
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offset += len + 1;
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}
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}
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const char *
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ipcmMessageCLIST::NextClientName(const char *cName) const
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{
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if (!cName)
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return Data() + 1;
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cName += strlen(cName) + 1;
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if (cName == MsgBuf() + MsgLen())
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cName = NULL;
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return cName;
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}
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//
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// FWD message
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//
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// +----------------------+
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// | BYTE - IPCM_MSG_FWD |
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// +----------------------+
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// | dest_client |
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// +----------------------+
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// | null |
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// +----------------------+
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// | dest_msg |
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// +----------------------+
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//
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const char ipcmMessageFWD::MSG_TYPE = (char) IPCM_MSG_FWD;
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ipcmMessageFWD::ipcmMessageFWD(const char *dClient, const ipcMessage *dMsg)
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{
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int cLen = strlen(dClient);
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int dataLen = 1 + // msg_type
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cLen + // dest_client
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1 + // null
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dMsg->MsgLen(); // dest_msg
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Init(IPCM_TARGET, NULL, dataLen);
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SetData(0, &MSG_TYPE, 1);
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SetData(1, dClient, cLen + 1);
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SetData(1 + cLen + 1, dMsg->MsgBuf(), dMsg->MsgLen());
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}
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const char *
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ipcmMessageFWD::DestClient() const
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{
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return Data() + 1;
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}
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PRStatus
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ipcmMessageFWD::DestMessage(ipcMessage *msg) const
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{
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const char *ptr = DestClient();
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// XXX use a custom loop here to avoid walking off the end of the buffer
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PRUint32 cLen = strlen(ptr);
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PRUint32 dLen = MsgLen() - 1 - cLen - 1;
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PRUint32 bytesRead;
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PRBool complete;
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ptr += (cLen + 1);
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if (msg->ReadFrom(ptr, dLen, &bytesRead, &complete) != PR_SUCCESS || !complete)
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return PR_FAILURE;
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return PR_SUCCESS;
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}
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