nsapi_error_t NanostackInterface::socket_connect(void *handle, const SocketAddress &addr)
{
// Validate parameters
NanostackSocket *socket = static_cast<NanostackSocket *>(handle);
nsapi_error_t ret;
if (handle == NULL) {
MBED_ASSERT(false);
return NSAPI_ERROR_NO_SOCKET;
}
NanostackLockGuard lock;
if (addr.get_ip_version() != NSAPI_IPv6) {
ret = NSAPI_ERROR_UNSUPPORTED;
goto out;
}
if (socket->closed()) {
ret = NSAPI_ERROR_NO_CONNECTION;
goto out;
}
if (socket->is_connecting()) {
ret = NSAPI_ERROR_ALREADY;
goto out;
}
if (socket->is_connected()) {
ret = NSAPI_ERROR_IS_CONNECTED;
goto out;
}
ns_address_t ns_addr;
convert_mbed_addr_to_ns(&ns_addr, &addr);
if (::socket_connect(socket->socket_id, &ns_addr, 0) == 0) {
if (socket->proto == SOCKET_TCP) {
socket->set_connecting(&ns_addr);
ret = NSAPI_ERROR_IN_PROGRESS;
} else {
ret = NSAPI_ERROR_OK;
}
} else {
ret = NSAPI_ERROR_DEVICE_ERROR;
}
out:
tr_debug("socket_connect(socket=%p) sock_id=%d, ret=%i", socket, socket->socket_id, ret);
return ret;
}
nsapi_size_or_error_t NanostackInterface::do_sendto(void *handle, const ns_address_t *address, const void *data, nsapi_size_t size)
{
// Validate parameters
NanostackSocket * socket = static_cast<NanostackSocket *>(handle);
if (handle == NULL) {
MBED_ASSERT(false);
return NSAPI_ERROR_NO_SOCKET;
}
nsapi_size_or_error_t ret;
NanostackLockGuard lock;
if (socket->closed() || (!address && !socket->is_connected())) {
ret = NSAPI_ERROR_NO_CONNECTION;
goto out;
}
if (address && socket->proto == SOCKET_TCP) {
tr_error("socket_sendto() not supported with TCP!");
ret = NSAPI_ERROR_IS_CONNECTED;
goto out;
}
int retcode;
#if 0
retcode = ::socket_sendto(socket->socket_id, address,
data, size);
#else
// Use sendmsg purely to get the new return style
// of returning data written rather than 0 on success,
// which means TCP can do partial writes. (Sadly,
// it's the only call which takes flags so we can
// leave the NS_MSG_LEGACY0 flag clear).
ns_msghdr_t msg;
ns_iovec_t iov;
iov.iov_base = const_cast<void *>(data);
iov.iov_len = size;
msg.msg_name = const_cast<ns_address_t *>(address);
msg.msg_namelen = address ? sizeof *address : 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = NULL;
msg.msg_controllen = 0;
retcode = ::socket_sendmsg(socket->socket_id, &msg, 0);
#endif
/*
* \return length if entire amount written (which could be 0)
* \return value >0 and <length if partial amount written (stream only)
* \return NS_EWOULDBLOCK if nothing written due to lack of queue space.
* \return -1 Invalid socket ID or message structure.
* \return -2 Socket memory allocation fail.
* \return -3 TCP state not established or address scope not defined .
* \return -4 Socket TX process busy or unknown interface.
* \return -5 Socket not connected
* \return -6 Packet too short (ICMP raw socket error).
* */
if (retcode == NS_EWOULDBLOCK) {
ret = NSAPI_ERROR_WOULD_BLOCK;
} else if (retcode < 0) {
tr_error("socket_sendmsg: error=%d", retcode);
ret = NSAPI_ERROR_DEVICE_ERROR;
} else {
ret = retcode;
}
out:
tr_debug("socket_sendto(socket=%p) sock_id=%d, ret=%i", socket, socket->socket_id, ret);
return ret;
}