getpeername(2) [opendarwin man page]

GETPEERNAME(2)						      BSD System Calls Manual						    GETPEERNAME(2)

NAME

     getpeername -- get name of connected peer

SYNOPSIS

     #include <sys/socket.h>

     int
     getpeername(int s, struct sockaddr *name, int *namelen);

DESCRIPTION

     Getpeername() 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 pro-
     vided is too small.

DIAGNOSTICS

     A 0 is returned if the call succeeds, -1 if it fails.

ERRORS

     The call succeeds unless:

     [EBADF]		The argument s is not a valid descriptor.

     [ENOTSOCK] 	The argument s is a file, not a socket.

     [ENOTCONN] 	The socket is not connected.

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

     [EFAULT]		The name parameter points to memory not in a valid part of the process address space.

SEE ALSO

     accept(2), bind(2), socket(2), getsockname(2)

HISTORY

     The getpeername() function call appeared in 4.2BSD.

4.2 Berkeley Distribution					   June 4, 1993 					 4.2 Berkeley Distribution

GETPEERNAME(2)						      BSD System Calls Manual						    GETPEERNAME(2)

NAME

     getpeername -- get address of connected peer

SYNOPSIS

     #include <sys/socket.h>

     int
     getpeername(int socket, struct sockaddr *restrict address, socklen_t *restrict address_len);

DESCRIPTION

     The getpeername() function returns the address of the peer connected to the specified socket.

     The address_len parameter should be initialized to indicate the amount of space pointed to by address.  On return it contains the actual size
     of the address returned (in bytes).

     The address is truncated if the buffer provided is too small.

RETURN VALUES

     The getpeername() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to
     indicate the error.

ERRORS

     The call succeeds unless:

     [EBADF]		The argument socket is not a valid descriptor.

     [EFAULT]		The address parameter points to memory not in a valid part of the process address space.

     [EINVAL]		socket has been shut down.

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

     [ENOTCONN] 	Either the socket is not connected or it has not had the peer pre-specified.

     [ENOTSOCK] 	The argument socket refers to something other than a socket (e.g., a file).

     [EOPNOTSUPP]	getpeername() is not supported for the protocol in use by socket.

SEE ALSO

     accept(2), bind(2), getsockname(2), socket(2)

HISTORY

     The getpeername() function call appeared in 4.2BSD.

4.2 Berkeley Distribution					   June 4, 1993 					 4.2 Berkeley Distribution