Function getpeername [src]

Prototype

pub fn getpeername(sock: socket_t, addr: *sockaddr, addrlen: *socklen_t) GetSockNameError!void

Parameters

sock: socket_taddr: *sockaddraddrlen: *socklen_t

Possible Errors

FileDescriptorNotASocket

NetworkSubsystemFailed

The network subsystem has failed.

SocketNotBound

Socket hasn't been bound yet

SystemResources

Insufficient resources were available in the system to perform the operation.

Unexpected UnexpectedError

The Operating System returned an undocumented error code.

This error is in theory not possible, but it would be better to handle this error than to invoke undefined behavior.

When this error code is observed, it usually means the Zig Standard Library needs a small patch to add the error code to the error set for the respective function.

Source

  pub fn getpeername(sock: socket_t, addr: *sockaddr, addrlen: *socklen_t) GetSockNameError!void {
    if (native_os == .windows) {
        const rc = windows.getpeername(sock, addr, addrlen);
        if (rc == windows.ws2_32.SOCKET_ERROR) {
            switch (windows.ws2_32.WSAGetLastError()) {
                .WSANOTINITIALISED => unreachable,
                .WSAENETDOWN => return error.NetworkSubsystemFailed,
                .WSAEFAULT => unreachable, // addr or addrlen have invalid pointers or addrlen points to an incorrect value
                .WSAENOTSOCK => return error.FileDescriptorNotASocket,
                .WSAEINVAL => return error.SocketNotBound,
                else => |err| return windows.unexpectedWSAError(err),
            }
        }
        return;
    } else {
        const rc = system.getpeername(sock, addr, addrlen);
        switch (errno(rc)) {
            .SUCCESS => return,
            else => |err| return unexpectedErrno(err),

            .BADF => unreachable, // always a race condition
            .FAULT => unreachable,
            .INVAL => unreachable, // invalid parameters
            .NOTSOCK => return error.FileDescriptorNotASocket,
            .NOBUFS => return error.SystemResources,
        }
    }
}  