Wireshark ip address5/16/2023 ![]() ![]() Inform the kernel do not fill up the packet structure. Ip->iph_chksum = csum((unsigned short *) buffer, sizeof(struct ipheader) + sizeof(struct udpheader)) Udp->udph_len = htons(sizeof(struct udpheader)) Source IP address, can use spoofed address here!!! Ip->iph_len = sizeof(struct ipheader) + sizeof(struct udpheader) Sd = socket(PF_INET, SOCK_RAW, IPPROTO_UDP) Source and destination addresses: IP and port Struct udpheader *udp = (struct udpheader *) (buffer + sizeof(struct ipheader)) Struct ipheader *ip = (struct ipheader *) buffer Source IP, source port, target IP, target port from the command line arguments Unsigned short csum(unsigned short *buf, int nwords) When you start typing, Wireshark will help you autocomplete your filter. For example, type dns and you’ll see only DNS packets. The most basic way to apply a filter is by typing it into the filter box at the top of the window and clicking Apply (or pressing Enter). computing the checksum, the value of the checksum field is zero." That’s where Wireshark’s filters come in. complement sum of all 16 bit words in the header. "The checksum field is the 16 bit one's complement of the one's total udp header length: 8 bytes (=64 bits) Can create separate header file (.h) for all headers' structure Must be run by root lol! Just datagram, no payload/data ![]() ![]() I am unable to figure out what is going on Linux. All I see is a packet from an unknown IP source (64.17.17.214) to the spoofed IP (.212). Now whenever I pass the parameters (spoofed IP address and destination) to the output of the program, I never see any packet from Spoofed IP to destination in Wireshark. 192.168.1.212 - Spoofed IP (It's actually my IPhone IP).I am using a spoofing program for this which uses raw sockets. I have a Ubuntu machine and I want to send spoofed IP address (.212) to a Windows machine. ![]()
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