C Interface |
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#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
getpeername(s, addr, addrlen)
int s;
struct sockaddr_in *addr;
int *addrlen;
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Description |
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S is a socket descriptor. The
getpeername system call returns the address of the peer
socket connected to the socket indicated by s. The addr
parameter points to a socket address structure in which this address
is returned. The addrlen parameter points to an object of
the type int, which should be initialized to indicate the size
of the address structure. On return, the addrlen parameter
contains the actual size of the address returned (in bytes). If addr
does not point to enough space to contain the whole address of the
peer, only the first addrlen bytes of the address are returned.
This call is supported for AF_INET only.
Return Value |
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If the call is successful, a 0 is returned. If the call fails, a -1 is returned, and an error code is stored in errno.
Errors |
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The following errors are returned by getpeername:
- [EBADF]
The argument s is not a valid file 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 addr or addrlen parameters are not
valid pointers.
- [EINVAL]
The socket has been shut down.
- [EOPNOTSUPP]
The operation is not supported for AF_UNIX
sockets.
Author |
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UCB (University of California at Berkeley)
See Also |
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bind, socket, getsockname
