c - UDP checksum calculation - Stack Overflow
The UDP checksum is performed over the entire payload, and the other fields in the header, and some fields from the IP header. A pseudo-header is constructed from the IP header in order to …
How can i access and modify my UDP header? - Stack Overflow
2012年2月16日 · UDP does not contain such things as headers, segment numbers and total segments. In fact, a UDP datagram contains nothing except the buffer that you sendto. You …
C++ - Constructing a packet with headers and sending it through …
2012年11月29日 · You are creating the socket as socket(AF_INET, SOCK_DGRAM, 0); meaning that it's a datagram (=UDP, typically) socket, so the network stack will automatically include IP …
header - What is the size of udp packets if I send 0 payload data in …
2021年2月10日 · Some sources like wikipedia says that the use of the fields "Checksum" and "Source port" is optional in IPv4 UDP header. So does that mean, that if I want to turn off …
what is overhead, payload, and header - Stack Overflow
2014年7月22日 · Can someone please explain me what is overhead, payload, header and packet. As far as I know a packet is the whole data that is to be transmitted. This packet consists of …
UDP checksum calculation for IPv6 packet - Stack Overflow
2015年6月16日 · I am trying to understand the UDP checksum calculation method for IPv6. I have this packet: IPv6 Header is -- 60 00 00 00 00 0c 11 fd 21 00 00 00 00 00 00 01 ab cd 00 00 00 …
udp - How big is an IP packet frame including headers? - Stack …
The application will run on a LAN (not internet). I've been assuming that if my MTU is 1500 then thats how big a UDP payload can be, but I'm not sure if the UDP header is meant to fit within …
network programming - UDP maximum packet size - Stack Overflow
2017年3月5日 · The maximal internet header is 60 octets, and a typical internet header is 20 octets, allowing a margin for headers of higher level protocols. That means you must subtract …
Why UDP header has 'length field'? - Stack Overflow
2016年12月30日 · The UDP header length field is the length of the UDP header plus the UDP data. It is indeed redundant since this length can be calculated from the IP header total length …
Size of empty UDP and TCP packet? - Stack Overflow
2018年6月4日 · What is the size of an empty UDP datagram? And that of an empty TCP packet? I can only find info about the MTU, but I want to know what is the "base" size of these, in order …