// license:BSD-3-Clause // copyright-holders:Carl, Miodrag Milanovic #include "emu.h" #include "osdnet.h" device_network_interface::device_network_interface(const machine_config &mconfig, device_t &device, float bandwidth) : device_interface(device, "network") { m_promisc = false; m_bandwidth = bandwidth; set_mac("\0\0\0\0\0\0"); m_intf = -1; m_loopback_control = false; } device_network_interface::~device_network_interface() { } void device_network_interface::interface_pre_start() { m_send_timer.init(*this, FUNC(device_network_interface::send_complete)); m_recv_timer.init(*this, FUNC(device_network_interface::recv_complete)); } void device_network_interface::interface_post_start() { device().save_item(NAME(m_loopback_control)); } int device_network_interface::send(u8 *buf, int len, int fcs) { // TODO: enable this check when other devices implement delayed transmit //if (m_send_timer->enabled()) //throw emu_fatalerror("%s(%s): attempted to transmit while transmit already in progress", device().shortname(), device().tag()); int result = 0; if (m_loopback_control) { // loop data back to receiver result = recv_start_cb(buf, len); if (result) { // schedule receive complete callback m_recv_timer.adjust(attotime::from_ticks(len, m_bandwidth * 1'000'000 / 8), result); } } else if (m_dev) { // send the data (excluding fcs) result = m_dev->send(buf, len - fcs); if (result) result += fcs; } // schedule transmit complete callback m_send_timer.adjust(attotime::from_ticks(len, m_bandwidth * 1'000'000 / 8), result); return result; } void device_network_interface::send_complete(timer_instance const &timer) { send_complete_cb(timer.param()); } void device_network_interface::recv_cb(u8 *buf, int len) { if (m_recv_timer.enabled()) throw emu_fatalerror("%s(%s): attempted to receive while receive already in progress", device().shortname(), device().tag()); int result = 0; // process the received data if (!m_loopback_control) result = recv_start_cb(buf, len); if (result) { // stop receiving more data from the network if (m_dev) m_dev->stop(); // schedule receive complete callback m_recv_timer.adjust(attotime::from_ticks(len, m_bandwidth * 1'000'000 / 8), result); } } void device_network_interface::recv_complete(timer_instance const &timer) { recv_complete_cb(timer.param()); // start receiving data from the network again if (m_dev && !m_loopback_control) m_dev->start(); } void device_network_interface::set_promisc(bool promisc) { m_promisc = promisc; if(m_dev) m_dev->set_promisc(promisc); } void device_network_interface::set_mac(const char *mac) { memcpy(m_mac, mac, 6); if(m_dev) m_dev->set_mac(m_mac); } void device_network_interface::set_interface(int id) { if(m_dev) m_dev->stop(); m_dev.reset(open_netdev(id, this, (int)(m_bandwidth*1000000/8.0f/1500))); if(!m_dev) { device().logerror("Network interface %d not found\n", id); id = -1; } m_intf = id; } void device_network_interface::set_loopback(bool loopback) { if (m_loopback_control == loopback) return; m_loopback_control = loopback; if (m_dev) { if (loopback) m_dev->stop(); else if (!m_recv_timer.enabled()) m_dev->start(); } }