diff options
Diffstat (limited to 'framework/src/onos/apps/routing/src/main/java/org/onosproject/routing/bgp/BgpFrameDecoder.java')
| -rw-r--r-- | framework/src/onos/apps/routing/src/main/java/org/onosproject/routing/bgp/BgpFrameDecoder.java | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/framework/src/onos/apps/routing/src/main/java/org/onosproject/routing/bgp/BgpFrameDecoder.java b/framework/src/onos/apps/routing/src/main/java/org/onosproject/routing/bgp/BgpFrameDecoder.java deleted file mode 100644 index 98ec4a45..00000000 --- a/framework/src/onos/apps/routing/src/main/java/org/onosproject/routing/bgp/BgpFrameDecoder.java +++ /dev/null @@ -1,177 +0,0 @@ -/* - * Copyright 2014-2015 Open Networking Laboratory - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package org.onosproject.routing.bgp; - -import org.jboss.netty.buffer.ChannelBuffer; -import org.jboss.netty.buffer.ChannelBuffers; -import org.jboss.netty.channel.Channel; -import org.jboss.netty.channel.ChannelHandlerContext; -import org.jboss.netty.handler.codec.frame.FrameDecoder; -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; - -/** - * Class for handling the decoding of the BGP messages. - */ -class BgpFrameDecoder extends FrameDecoder { - private static final Logger log = - LoggerFactory.getLogger(BgpFrameDecoder.class); - - private final BgpSession bgpSession; - - /** - * Constructor for a given BGP Session. - * - * @param bgpSession the BGP session state to use. - */ - BgpFrameDecoder(BgpSession bgpSession) { - this.bgpSession = bgpSession; - } - - @Override - protected Object decode(ChannelHandlerContext ctx, - Channel channel, - ChannelBuffer buf) throws Exception { - // - // NOTE: If we close the channel during the decoding, we might still - // see some incoming messages while the channel closing is completed. - // - if (bgpSession.isClosed()) { - return null; - } - - log.trace("BGP Peer: decode(): remoteAddr = {} localAddr = {} " + - "messageSize = {}", - ctx.getChannel().getRemoteAddress(), - ctx.getChannel().getLocalAddress(), - buf.readableBytes()); - - // Test for minimum length of the BGP message - if (buf.readableBytes() < BgpConstants.BGP_HEADER_LENGTH) { - // No enough data received - return null; - } - - // - // Mark the current buffer position in case we haven't received - // the whole message. - // - buf.markReaderIndex(); - - // - // Read and check the BGP message Marker field: it must be all ones - // (See RFC 4271, Section 4.1) - // - byte[] marker = new byte[BgpConstants.BGP_HEADER_MARKER_LENGTH]; - buf.readBytes(marker); - for (int i = 0; i < marker.length; i++) { - if (marker[i] != (byte) 0xff) { - log.debug("BGP RX Error: invalid marker {} at position {}", - marker[i], i); - // - // ERROR: Connection Not Synchronized - // - // Send NOTIFICATION and close the connection - int errorCode = BgpConstants.Notifications.MessageHeaderError.ERROR_CODE; - int errorSubcode = - BgpConstants.Notifications.MessageHeaderError.CONNECTION_NOT_SYNCHRONIZED; - ChannelBuffer txMessage = - BgpNotification.prepareBgpNotification(errorCode, - errorSubcode, - null); - ctx.getChannel().write(txMessage); - bgpSession.closeSession(ctx); - return null; - } - } - - // - // Read and check the BGP message Length field - // - int length = buf.readUnsignedShort(); - if ((length < BgpConstants.BGP_HEADER_LENGTH) || - (length > BgpConstants.BGP_MESSAGE_MAX_LENGTH)) { - log.debug("BGP RX Error: invalid Length field {}. " + - "Must be between {} and {}", - length, - BgpConstants.BGP_HEADER_LENGTH, - BgpConstants.BGP_MESSAGE_MAX_LENGTH); - // - // ERROR: Bad Message Length - // - // Send NOTIFICATION and close the connection - ChannelBuffer txMessage = - BgpNotification.prepareBgpNotificationBadMessageLength(length); - ctx.getChannel().write(txMessage); - bgpSession.closeSession(ctx); - return null; - } - - // - // Test whether the rest of the message is received: - // So far we have read the Marker (16 octets) and the - // Length (2 octets) fields. - // - int remainingMessageLen = - length - BgpConstants.BGP_HEADER_MARKER_LENGTH - 2; - if (buf.readableBytes() < remainingMessageLen) { - // No enough data received - buf.resetReaderIndex(); - return null; - } - - // - // Read the BGP message Type field, and process based on that type - // - int type = buf.readUnsignedByte(); - remainingMessageLen--; // Adjust after reading the type - ChannelBuffer message = buf.readBytes(remainingMessageLen); - - // - // Process the remaining of the message based on the message type - // - switch (type) { - case BgpConstants.BGP_TYPE_OPEN: - BgpOpen.processBgpOpen(bgpSession, ctx, message); - break; - case BgpConstants.BGP_TYPE_UPDATE: - BgpUpdate.processBgpUpdate(bgpSession, ctx, message); - break; - case BgpConstants.BGP_TYPE_NOTIFICATION: - BgpNotification.processBgpNotification(bgpSession, ctx, message); - break; - case BgpConstants.BGP_TYPE_KEEPALIVE: - BgpKeepalive.processBgpKeepalive(bgpSession, ctx, message); - break; - default: - // - // ERROR: Bad Message Type - // - // Send NOTIFICATION and close the connection - int errorCode = BgpConstants.Notifications.MessageHeaderError.ERROR_CODE; - int errorSubcode = BgpConstants.Notifications.MessageHeaderError.BAD_MESSAGE_TYPE; - ChannelBuffer data = ChannelBuffers.buffer(1); - data.writeByte(type); - ChannelBuffer txMessage = - BgpNotification.prepareBgpNotification(errorCode, errorSubcode, - data); - ctx.getChannel().write(txMessage); - bgpSession.closeSession(ctx); - return null; - } - return null; - } -} |