IS IT POSSIBLE TO SEND TCP PACKET WITH THE SOCKET?

Question

Hello everybody iam programing HIJACK attack with jbuilder8 that consiste to detecte a communication between the client and server (tcp session or tcp connexion) and read all informations from this tcp packet(like N�ACK,N� SEQ..) and finnaly send a tcp packet with false information. I have make this project with C under linux(red hat9) compiled with GCC and i have used raw socket like this:
int creat_socket(char *interface)
int fd;
struct ifreq ifr;
struct sockaddr_ll sll;
if ((fd=socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL)))==-1)//creat socket {
     perror("socket");
     return -1;
memset(&ifr, 0, sizeof(struct ifreq));//remplir ifr par des '0'
strcpy(ifr.ifr_name, interface);//copier le nom de l'interface ds ifr_name
if (ioctl(fd, SIOCGIFINDEX, &ifr)==-1)//Retrouve le num�ro d'interface et le place dans ifr_ifindex.
     perror("ioctl");
     return -1;
memset(&sll, 0, sizeof(struct sockaddr_ll));//remplir sll par des '0'
sll.sll_family=PF_PACKET;
sll.sll_ifindex=ifr.ifr_ifindex;
sll.sll_protocol=htons(ETH_P_ALL);
if (bind(fd, (struct sockaddr *)&sll, sizeof(struct sockaddr_ll))==-1)//lie le socket a l'interface
     perror("bind");
     return -1;
if (ioctl(fd, SIOCGIFFLAGS, &ifr)==-1)//Lire les attributs actifs du p�riph�rique
     perror("ioctl");
     return -1;
ifr.ifr_flags|=IFF_PROMISC;//Interface en mode promiscuous
if (ioctl(fd, SIOCSIFFLAGS, &ifr)==-1)////ecrire les attributs actifs du p�riph�rique
     perror("ioctl");
     return -1;
return fd;
PROBLEM : I want to know if it�s possible to make that in java because i had search and i have found just the client and server socket but i want a socket to send tcp Packet? Thank you.

Answer 1

hello i had found the ROCKSAW (http://www.savarese.org/software/rocksaw.html ) and i had used in my program, but when the program arrived in:
socket_send=new RawSocket();
i had this error:
java.lang.UnsupportedClassVersionError: org/savarese/rocksaw/net/RawSocket (Unsupported major.minor version 49.0)
     at java.lang.ClassLoader.defineClass0(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
     at hijack.M_HIJACK.tcpsend(M_HIJACK.java:345)
     at hijack.M_HIJACK.injection_actionPerformed(M_HIJACK.java:611)
     at hijack.M_HIJACK_injection_actionAdapter.actionPerformed(M_HIJACK.java:861)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1764)
     at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1817)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
     at java.awt.Component.processMouseEvent(Component.java:5093)
     at java.awt.Component.processEvent(Component.java:4890)
     at java.awt.Container.processEvent(Container.java:1566)
     at java.awt.Component.dispatchEventImpl(Component.java:3598)
     at java.awt.Container.dispatchEventImpl(Container.java:1623)
     at java.awt.Component.dispatchEvent(Component.java:3439)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
     at java.awt.Container.dispatchEventImpl(Container.java:1609)
     at java.awt.Component.dispatchEvent(Component.java:3439)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
i think that is a problem with a version of JDK (i have jdk1.4) so if you have an idea please help me