How to implement the Listener thread

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LEARN ABOUT SUSE

getpeername

GETPEERNAME(2)						     Linux Programmer's Manual						    GETPEERNAME(2)

NAME

       getpeername - get name of connected peer socket

SYNOPSIS

       #include <sys/socket.h>

       int getpeername(int sockfd, struct sockaddr *addr, socklen_t *addrlen);

DESCRIPTION

       getpeername()  returns  the  address  of  the  peer connected to the socket sockfd, in the buffer pointed to by addr.  The addrlen argument
       should be initialized to indicate the amount of space pointed to by addr.  On return it contains the actual size of the name  returned  (in
       bytes).	The name is truncated if the buffer provided is too small.

       The  returned address is truncated if the buffer provided is too small; in this case, addrlen will return a value greater than was supplied
       to the call.

RETURN VALUE

       On success, zero is returned.  On error, -1 is returned, and errno is set appropriately.

ERRORS

       EBADF  The argument sockfd is not a valid descriptor.

       EFAULT The addr argument points to memory not in a valid part of the process address space.

       EINVAL addrlen is invalid (e.g., is negative).

       ENOBUFS
	      Insufficient resources were available in the system to perform the operation.

       ENOTCONN
	      The socket is not connected.

       ENOTSOCK
	      The argument sockfd is a file, not a socket.

CONFORMING TO

       SVr4, 4.4BSD (the getpeername() function call first appeared in 4.2BSD), POSIX.1-2001.

NOTES

       The third argument of getpeername() is in reality an int * (and this is what 4.x BSD and libc4  and  libc5  have).   Some  POSIX  confusion
       resulted in the present socklen_t, also used by glibc.  See also accept(2).

SEE ALSO

       accept(2), bind(2), getsockname(2), ip(7), socket(7), unix(7)

COLOPHON

       This  page is part of release 3.25 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2008-12-03							    GETPEERNAME(2)

Programming