GETPEERNAME(2) Linux Programmer's Manual GETPEERNAME(2)NAMEgetpeername - get name of connected peer socket
SYNOPSIS
#include <sys/socket.h>
int getpeername(int s, struct sockaddr *name, socklen_t *namelen);
DESCRIPTIONgetpeername() returns the name of the peer connected to socket s. The
namelen parameter should be initialized to indicate the amount of space
pointed to by name. On return it contains the actual size of the name
returned (in bytes). The name is truncated if the buffer provided is
too small.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is
set appropriately.
ERRORS
EBADF The argument s is not a valid descriptor.
EFAULT The name parameter points to memory not in a valid part of the
process address space.
EINVAL namelen 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 s is a file, not a socket.
CONFORMING TO
SVr4, 4.4BSD (the getpeername() function call first appeared in
4.2BSD), POSIX.1-2001.
NOTE
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 ALSOaccept(2), bind(2), getsockname(2)BSD Man Page 1993-07-30 GETPEERNAME(2)
