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Name

getpeername - get name of connected peer socket

Synopsis

#include <sys/socket.h>

int getpeername(int s, struct sockaddr *name, socklen_t *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 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.

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.

Conforming to

SVr4, 4.4BSD (the getpeername function call first appeared in 4.2BSD).

Note

The third argument of getpeername is in reality an `int *' (and this is what BSD 4.* and libc4 and libc5 have). Some POSIX confusion resulted in the present socklen_t. The draft standard has not been adopted yet, but glibc2 already follows it and also has socklen_t. See also accept(2) .

See Also

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

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