getpeername - get the name of the peer socket
cc [ flag ... ] file ... -lxnet [ library ... ]
int getpeername(int socket, struct sockaddr *restrict address,
socklen_t *restrict address_len);
The getpeername() function retrieves the peer address of the specified
socket, stores this address in the sockaddr structure pointed to by the
address argument, and stores the length of this address in the object
pointed to by the address_len argument.
If the actual length of the address is greater than the length of
the supplied sockaddr structure, the stored address will be
If the protocol permits connections by unbound clients, and the
peer is not bound, then the value stored in the object pointed to by
address is unspecified.
Upon successful completion, 0 is returned. Otherwise, −1 is returned and
errno is set to indicate the error.
The getpeername() function will fail if:
The socket argument is not a valid file
The address or address_len parameter can
not be accessed or written.
The socket has been shut down.
The socket is not connected or otherwise has not had the
The socket argument does not refer to a
The operation is not supported for the socket
The getpeername() function may fail if:
Insufficient resources were available in the system to
complete the call.
There were insufficient STREAMS resources available for
the operation to complete.
See attributes(7) for descriptions of the following attributes: