raw-sockets

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . I wrote a rawudp program to send udp packet via raw socket, following the webpage http://www.tenouk.com/Module43a.html. Then I wrote a udp server to listen to udp packets on given port. The codes look like follows: ... sd = socket(AF_INET, SOCK_DGRAM, 0); bind(sd, (struct sockaddr *)&ipaddr, sizeof(ipaddr));

问题 I have a question for the Low-level networking/Linux gurus, I have to build two tools for a security project at my university. The first tool is an ARP Poisonning attacker which will poison the ARP cache from a remote host in order to retrieve the data he is sending to another host. I wrote this tool in C using RAW sockets and it works perfectly, i am able to intercept the data transmitted from a host A to a host B and from the host B back to the host A. The problem comes when writing the

问题 I'm trying to write a program that receives DHCP discoveries (UDP) and forwards them on to a given IP address using a different source IP address depending on the content of a specific field (GIADDR) in the DHCP packet. I could get working the receiving and sending bit but I'm having an issue with using as IP source address anything that is not a configured IP address on the local machine. I believe that this can only be done using Raw sockets; is that true ? Are there any examples out there

问题 I'm trying to implement an ICMP echo ping packet myself using Raw Socket. When taking tcpdump on my Linux machine, I'm finding that the Echo ping request has been successfully sent but when I'm observing the incoming packets in my Windows machine using Wireshark, no incoming ICMP requests are observed. I've written the following code to implement the ICMP echo request and reply. #include <stdio.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h>

问题 Good time of day. Ruby Code: def hw_address(iface) sock = Socket.new(Socket::AF_INET, Socket::SOCK_DGRAM,0) buf = [iface,""].pack('a16h16') sock.ioctl(SIOCGIFHWADDR, buf); sock.close return buf[18..24].to_etheraddr end puts hw_address('lo0') What it do: gets mac-address of interface. Works on Debian as expected. But on Mac OS X, im getting error: ``ioctl': Operation not supported on socket (Errno::EOPNOTSUPP)` Is there anyway to fix/pass this error message & get working ioctl on Sockets? 回答1:

问题 I'm trying to send an IP packet using c#. destAddress = IPAddress.Parse("192.168.0.198"), destPort = 80; // Create a raw socket to send this packet rawSocket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP); // Bind the socket to the interface specified IPEndPoint iep = new IPEndPoint(IPAddress.Parse("192.168.0.140"),0); rawSocket.Bind(iep); // Set the HeaderIncluded option since we include the IP header rawSocket.SetSocketOption( socketLevel, SocketOptionName

问题 I want to get the TCP header of each received TCP packet (destined for a specific program,namely, a port) it seems not possible to use recv() or recvfrom() to get the TCP header using regular socket. So, I want to use raw socket with raw socket, I can use recvfrom() to receive all IP packets destined to the host if the host receives a lot packets, I need to check the port number of each packet so see whether it is the needed. then it could be very time and CPU comsuming? while（） { recvfrom();

问题 I want to get the TCP header of each received TCP packet (destined for a specific program,namely, a port) it seems not possible to use recv() or recvfrom() to get the TCP header using regular socket. So, I want to use raw socket with raw socket, I can use recvfrom() to receive all IP packets destined to the host if the host receives a lot packets, I need to check the port number of each packet so see whether it is the needed. then it could be very time and CPU comsuming? while（） { recvfrom();

问题 I would like to realize a RAW socket in Python and then send data from the Client to the Server. Unlike a normal socket I've tried to use the following definition s = socket.socket(socket.AF_PACKET, socket.SOCK_RAW) but commands as s.listen(1), s.connect() are not working. I have no clue how to program both the Client.py and the Server.py. Can someone help me? 回答1: That's because a raw socket doesn't utelize the Ethernet/TCP/IP library at all. It's a RAW socket, you're in charge of whatever

问题 I am trying to send across a character array using a transmitter and a receiver program using raw sockets. I am able to get the correct number of bytes sent at the receiver side, but the values printed out are garbage. Could someone help me out here? Transmitter: int create_raw_socket(char *dev) { struct sockaddr_ll sll; struct ifreq ifr; int fd, ifi, rb; bzero(&sll, sizeof(sll)); bzero(&ifr, sizeof(ifr)); fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); assert(fd != -1); strncpy((char *