static Packet createDataPacket(
MacAddress srcAddress_mac,
MacAddress dstAddrress_mac,
Inet4Address srcAddress, short srcPort,
Inet4Address dstAddress, short dstPort,
int sequence, int ack, byte[] data, short ident)
{
Packet p = null;
TcpPacket.Builder builder_tcp = new TcpPacket.Builder();
builder_tcp.payloadBuilder(new UnknownPacket.Builder().rawData(data));
builder_tcp.correctChecksumAtBuild(true);
builder_tcp.correctLengthAtBuild(true);
builder_tcp.paddingAtBuild(true);
builder_tcp.ack(true);
builder_tcp.acknowledgmentNumber(ack);
//builder_tcp.checksum(tcpHeader.getChecksum());
//builder_tcp.dataOffset((byte)8);
builder_tcp.dstAddr(dstAddress);
builder_tcp.dstPort(new TcpPort(dstPort, ""));
builder_tcp.fin(false);
//builder_tcp.options(tcpHeader.getOptions());
//builder_tcp.padding(tcpHeader.getPadding());
builder_tcp.psh(false);
builder_tcp.reserved((byte)0);
builder_tcp.rst(false);
builder_tcp.sequenceNumber(sequence);
builder_tcp.srcAddr(srcAddress);
builder_tcp.srcPort(new TcpPort(srcPort, ""));
builder_tcp.syn(false);
builder_tcp.urg(false);
//builder_tcp.urgentPointer(tcpHeader.getUrgentPointer());
builder_tcp.window(window);
IpV4Packet.Builder builder_ipv4 = new IpV4Packet.Builder();
builder_ipv4.correctChecksumAtBuild(true);
builder_ipv4.correctLengthAtBuild(true);
builder_ipv4.dontFragmentFlag(true);
builder_ipv4.paddingAtBuild(true);
builder_ipv4.dstAddr(dstAddress);
builder_ipv4.fragmentOffset((short)0);
//builder_ipv4.headerChecksum(ipV4Header.getHeaderChecksum());
//short identification= Math.abs(random.nextInt(Short.MAX_VALUE));
//identification=ident;
builder_ipv4.identification(ident);
builder_ipv4.ihl((byte)5);
builder_ipv4.moreFragmentFlag(false);
//builder_ipv4.options(ipV4Header.getOptions());
//builder_ipv4.padding(ipV4Header.getPadding());
builder_ipv4.protocol(IpNumber.TCP);
//builder_ipv4.reservedFlag(ipV4Header.getReservedFlag());
builder_ipv4.srcAddr(srcAddress);
builder_ipv4.tos(IpV4Rfc1349Tos.newInstance((byte)0));
//builder_ipv4.totalLength( 52);
builder_ipv4.ttl(ttl);
builder_ipv4.version(IpVersion.IPV4);
builder_ipv4.payloadBuilder(builder_tcp);
p = buildIpV4(srcAddress_mac, dstAddrress_mac, builder_ipv4);
return(p);
}
static Packet createSyncAck(
MacAddress srcAddress_mac,
MacAddress dstAddrress_mac,
Inet4Address srcAddress, short srcPort,
Inet4Address dstAddress, short dstPort,
int ack_sequence, int sequence, short ident)
{
TcpPacket.Builder builder_tcp = new TcpPacket.Builder();
//builder_tcp.payloadBuilder(new UnknownPacket.Builder().rawData(new byte[0]));
builder_tcp.correctChecksumAtBuild(true);
builder_tcp.correctLengthAtBuild(true);
builder_tcp.paddingAtBuild(true);
builder_tcp.ack(true);
builder_tcp.acknowledgmentNumber(ack_sequence);
//builder_tcp.checksum(tcpHeader.getChecksum());
//builder_tcp.dataOffset((byte) 8);
builder_tcp.dstAddr(dstAddress);
builder_tcp.dstPort(new TcpPort(dstPort, ""));
//builder_tcp.fin(tcpHeader.getFin());
ArrayList <TcpOption> tcp_options = new ArrayList <TcpOption>();
TcpNoOperationOption nop = TcpNoOperationOption.getInstance();
TcpMaximumSegmentSizeOption seg_option = new TcpMaximumSegmentSizeOption.Builder().maxSegSize(mtu).correctLengthAtBuild(true).build();
tcp_options.add(seg_option);
tcp_options.add(nop);
tcp_options.add(nop);
TcpSackPermittedOption sack_permit_option = TcpSackPermittedOption.getInstance();
tcp_options.add(sack_permit_option);
tcp_options.add(nop);
TcpWindowScaleOption win_option = new TcpWindowScaleOption.Builder().shiftCount(shiftCount).correctLengthAtBuild(true).build();
tcp_options.add(win_option);
builder_tcp.options(tcp_options);
//builder_tcp.padding(tcpHeader.getPadding());
builder_tcp.psh(false);
builder_tcp.reserved((byte)0);
builder_tcp.rst(false);
builder_tcp.sequenceNumber(sequence);
builder_tcp.srcAddr(srcAddress);
builder_tcp.srcPort(new TcpPort(srcPort, ""));
builder_tcp.syn(true);
builder_tcp.urg(false);
//builder_tcp.urgentPointer(tcpHeader.getUrgentPointer());
builder_tcp.window(window);
IpV4Packet.Builder builder_ipv4 = new IpV4Packet.Builder();
builder_ipv4.correctChecksumAtBuild(true);
builder_ipv4.correctLengthAtBuild(true);
builder_ipv4.paddingAtBuild(true);
builder_ipv4.dstAddr(dstAddress);
builder_ipv4.dontFragmentFlag(true);
builder_ipv4.fragmentOffset((short)0);
//builder_ipv4.headerChecksum(ipV4Header.getHeaderChecksum());
// short identification= Math.abs(random.nextInt(Short.MAX_VALUE));
builder_ipv4.identification(ident);
builder_ipv4.ihl((byte)5);
//builder_ipv4.moreFragmentFlag(ipV4Header.getMoreFragmentFlag());
//builder_ipv4.options(ipV4Header.getOptions());
//builder_ipv4.padding(ipV4Header.getPadding());
builder_ipv4.protocol(IpNumber.TCP);
// builder_ipv4.reservedFlag(ipV4Header.getReservedFlag());
builder_ipv4.srcAddr(srcAddress);
builder_ipv4.tos(IpV4Rfc1349Tos.newInstance((byte)0));
//builder_ipv4.totalLength( 52);
builder_ipv4.ttl(ttl);
builder_ipv4.version(IpVersion.IPV4);
builder_ipv4.payloadBuilder(builder_tcp);
//
Packet p = buildIpV4(srcAddress_mac, dstAddrress_mac, builder_ipv4);
//System.out.println("自定义确认 "+" identification "+identification+" ack_sequence "+ack_sequence+" # "+tcpPacket.getHeader());
return(p);
}