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getpeername(3c)

getpeername(3C)          Standard C Library Functions          getpeername(3C)

NAME
       getpeername - get the name of the peer socket

SYNOPSIS
       #include <sys/socket.h>

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

DESCRIPTION
       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.


       The caller is responsible for providing a pointer to a memory buffer of
       suitable  size  in  the  address  argument  (typically  a  struct sock‐
       addr_storage), and providing the size  of  that  buffer  in  the  value
       pointed to by the address_len argument. If the actual length of the ad‐
       dress  is  greater  than the length of the supplied sockaddr structure,
       the stored address will be truncated.


       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.

RETURN VALUES
       Upon successful completion, 0 is returned. Otherwise,  −1  is  returned
       and errno is set to indicate the error.

ERRORS
       The getpeername() function will fail if:

       EBADF         The socket argument is not a valid file descriptor.


       EFAULT        The  address or address_len parameter can not be accessed
                     or written.


       EINVAL        The socket has been shut down.


       ENOTCONN      The socket is not connected or otherwise has not had  the
                     peer prespecified.


       ENOTSOCK      The socket argument does not refer to a socket.


       EOPNOTSUPP    The operation is not supported for the socket protocol.



       The getpeername() function may fail if:

       ENOBUFS    Insufficient  resources were available in the system to com‐
                  plete the call.


       ENOSR      There were insufficient STREAMS resources available for  the
                  operation to complete.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:

       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _ Interface  StabilityCommitted  _  MT-LevelAsync-Signal-
       Safe _ StandardSee standards(7).


SEE ALSO
       accept(3C),  bind(3C),  getpeerucred(3C),  getsockname(3C), socket(3C),
       socket.h(3HEAD), attributes(7), standards(7)

HISTORY
       The getpeername() function has been present since the  initial  release
       of Solaris.

Oracle Solaris 11.4               2 Feb 2021                   getpeername(3C)
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