getpeername - 獲取連接的對等套接字的名稱

內容簡介

#include <sys/socket.h>
int getpeername(int s**, struct sockaddr *name, socklen_t *namelen);**

描述

getpeername () 返回連接到套接字s的同伴的名字。namelen 參數應被初始化，以指示的空間指向金額的名字。返回時它包含（以字節爲單位）返回的名稱的實際大小。該名稱被截斷，如果提供的緩衝區太小。

返回值

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

錯誤

標籤

描述

EBADF

The argument s is not a valid descriptor.

EFAULT

The name parameter yiibais 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.

遵循於

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

注意

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).

另請參閱

• accept (2)

• bind (2)

• getsockname (2)