CMSGLEN
CMSGLEN is a socket option in networking programming that controls the maximum length of messages that can be received from a connected socket. It is part of the Berkeley sockets API, commonly used in Unix-like operating systems and other platforms that support the POSIX standard. The option is defined in the header file `<sys/socket.h>` and is associated with the `SO_RCVBUF` option, though it serves a distinct purpose.
When setting CMSGLEN, developers specify the maximum size of ancillary data (control messages) that can be included
The importance of CMSGLEN lies in ensuring that applications can properly handle control information without buffer
CMSGLEN is particularly relevant in scenarios involving reliable but ordered data delivery, such as TCP-based applications,