The error code of the last failed socket call on this thread: WSAGetLastError on Windows, errno on Unix.
Read it straight after the call that failed. Compare it with SOCKET_WOULDBLOCK, SOCKET_WOULDBLOCK_CONNECT or the
WSAE... constants.
assert(socket_init());
s := socket(AF_INET, .SOCK_STREAM, .TCP);
defer close_and_reset(*s);
// Nothing listens on port 1, so the connection is refused.
address: sockaddr_in;
address.sin_family = AF_INET;
address.sin_port = htons(1);
#if OS == .WINDOWS address.sin_addr.S_un.S_addr = htonl(INADDR_LOOPBACK);
else address.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
length: socklen_t = size_of(sockaddr_in);
assert(connect(s, cast(*sockaddr) *address, length) != 0);
assert(get_last_socket_error() != 0);Doesn't run in the browser (skipped on wasm).
get_last_socket_error :: () -> W.OS_Error_CodeReturns
get_last_socket_error :: () -> Wasi.OS_Error_CodeThe error code of the last failed socket call: errno.
Returns
- Wasi.OS_Error_Code
get_last_socket_error :: () -> P.OS_Error_CodeThe error code of the last failed socket call on this thread: errno on Unix, WSAGetLastError on Windows.
Read it straight after the call that failed, before any other call can replace it. Compare it with SOCKET_WOULDBLOCK,
SOCKET_WOULDBLOCK_CONNECT or the platform's own error constants.
Returns
assert(socket_init());
// A port that was bound and then released has nobody listening on it.
probe := socket(AF_INET, .SOCK_STREAM, .TCP);
assert(bind(probe, htonl(INADDR_LOOPBACK), 0) == 0);
closed: sockaddr_in;
length: socklen_t = size_of(sockaddr_in);
assert(getsockname(probe, cast(*sockaddr) *closed, *length) == 0);
close_and_reset(*probe);
client := socket(AF_INET, .SOCK_STREAM, .TCP);
defer close_and_reset(*client);
assert(connect(client, cast(*sockaddr) *closed, length) != 0);
assert(get_last_socket_error() != 0);Doesn't run in the browser (skipped on wasm).