GETPEERNAME(2FREEBSD) - man page online | system calls

Get name of connected peer.

June 4, 1993
GETPEERNAME(2)                       BSD System Calls Manual                       GETPEERNAME(2)

NAME getpeername — get name of connected peer
LIBRARY Standard C Library (libc, -lc)
SYNOPSIS #include <sys/types.h> #include <sys/socket.h> int getpeername(int s, struct sockaddr * restrict name, socklen_t * restrict namelen);
DESCRIPTION The getpeername() system call returns the name of the peer connected to socket s. The namelen argument 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 trun‐ cated 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 s is not a valid descriptor. [ECONNRESET] The connection has been reset by the peer. [EINVAL] The value of the namelen argument is not valid. [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 opera‐ tion. [EFAULT] The name argument points to memory not in a valid part of the process address space.
SEE ALSO accept(2), bind(2), getsockname(2), socket(2)
HISTORY The getpeername() system call appeared in 4.2BSD.
BSD June 4, 1993 BSD
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getpeername(2freebsd) referred by
refer to accept(2) | bind(2) | getpeername(2) | getsockname(2) | socket(2)