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/* |
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* ether.cpp - Ethernet device driver |
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* |
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* Basilisk II (C) 1997-2001 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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/* |
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* SEE ALSO |
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* Inside Macintosh: Devices, chapter 1 "Device Manager" |
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* Inside Macintosh: Networking, chapter 11 "Ethernet, Token Ring, and FDDI" |
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* Inside AppleTalk, chapter 3 "Ethernet and TokenTalk Link Access Protocols" |
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*/ |
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|
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#include <string.h> |
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|
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "main.h" |
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#include "macos_util.h" |
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#include "emul_op.h" |
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#include "prefs.h" |
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#include "ether.h" |
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#include "ether_defs.h" |
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|
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#if SUPPORTS_UDP_TUNNEL |
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#include <netinet/in.h> |
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#include <sys/socket.h> |
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#include <sys/ioctl.h> |
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#include <netdb.h> |
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#include <errno.h> |
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#endif |
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|
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#include <map> |
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|
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#ifndef NO_STD_NAMESPACE |
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using std::map; |
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#endif |
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|
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#define DEBUG 0 |
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#include "debug.h" |
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|
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#define MONITOR 0 |
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|
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|
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// Global variables |
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uint8 ether_addr[6]; // Ethernet address (set by ether_init()) |
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static bool net_open = false; // Flag: initialization succeeded, network device open (set by EtherInit()) |
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|
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static bool udp_tunnel = false; // Flag: tunnelling AppleTalk over UDP using BSD socket API |
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static uint16 udp_port; |
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static int udp_socket = -1; |
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|
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// Mac address of driver data in MacOS RAM |
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uint32 ether_data = 0; |
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|
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// Attached network protocols for UDP tunneling, maps protocol type to MacOS handler address |
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static map<uint16, uint32> udp_protocols; |
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|
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|
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/* |
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* Initialization |
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*/ |
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|
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void EtherInit(void) |
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{ |
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net_open = false; |
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udp_tunnel = false; |
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|
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#if SUPPORTS_UDP_TUNNEL |
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// UDP tunnelling requested? |
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if (PrefsFindBool("udptunnel")) { |
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udp_tunnel = true; |
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udp_port = PrefsFindInt32("udpport"); |
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|
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// Open UDP socket |
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udp_socket = socket(PF_INET, SOCK_DGRAM, 0); |
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if (udp_socket < 0) { |
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perror("socket"); |
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return; |
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} |
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|
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// Bind to specified address and port |
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struct sockaddr_in sa; |
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memset(&sa, 0, sizeof(sa)); |
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sa.sin_family = AF_INET; |
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sa.sin_addr.s_addr = INADDR_ANY; |
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sa.sin_port = htons(udp_port); |
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if (bind(udp_socket, (struct sockaddr *)&sa, sizeof(sa)) < 0) { |
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perror("bind"); |
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close(udp_socket); |
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udp_socket = -1; |
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return; |
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} |
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|
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// Retrieve local IP address (or at least one of them) |
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socklen_t sa_len = sizeof(sa); |
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getsockname(udp_socket, (struct sockaddr *)&sa, &sa_len); |
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uint32 udp_ip = sa.sin_addr.s_addr; |
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if (udp_ip == INADDR_ANY || udp_ip == INADDR_LOOPBACK) { |
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char name[256]; |
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gethostname(name, sizeof(name)); |
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struct hostent *local = gethostbyname(name); |
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if (local) |
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udp_ip = *(uint32 *)local->h_addr_list[0]; |
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} |
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udp_ip = ntohl(udp_ip); |
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|
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// Construct dummy Ethernet address from local IP address |
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ether_addr[0] = 'B'; |
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ether_addr[1] = '2'; |
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ether_addr[2] = udp_ip >> 24; |
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ether_addr[3] = udp_ip >> 16; |
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ether_addr[4] = udp_ip >> 8; |
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ether_addr[5] = udp_ip; |
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D(bug("Ethernet address %02x %02x %02x %02x %02x %02x\n", ether_addr[0], ether_addr[1], ether_addr[2], ether_addr[3], ether_addr[4], ether_addr[5])); |
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|
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// Set socket options |
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int on = 1; |
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setsockopt(udp_socket, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)); |
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ioctl(udp_socket, FIONBIO, &on); |
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|
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// Start thread for packet reception |
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if (!ether_start_udp_thread(udp_socket)) { |
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close(udp_socket); |
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udp_socket = -1; |
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return; |
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} |
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|
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net_open = true; |
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} else |
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#endif |
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if (ether_init()) |
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net_open = true; |
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} |
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|
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|
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/* |
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* Deinitialization |
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*/ |
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|
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void EtherExit(void) |
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{ |
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if (net_open) { |
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#if SUPPORTS_UDP_TUNNEL |
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if (udp_tunnel) { |
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if (udp_socket >= 0) { |
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ether_stop_udp_thread(); |
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close(udp_socket); |
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udp_socket = -1; |
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} |
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} else |
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#endif |
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ether_exit(); |
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net_open = false; |
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} |
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} |
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|
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|
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/* |
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* Check whether Ethernet address is AppleTalk broadcast address |
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*/ |
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|
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static inline bool is_apple_talk_broadcast(uint8 *p) |
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{ |
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return p[0] == 0x09 && p[1] == 0x00 && p[2] == 0x07 |
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&& p[3] == 0xff && p[4] == 0xff && p[5] == 0xff; |
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} |
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|
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|
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/* |
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* Driver Open() routine |
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*/ |
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|
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int16 EtherOpen(uint32 pb, uint32 dce) |
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{ |
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D(bug("EtherOpen\n")); |
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|
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// Allocate driver data |
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M68kRegisters r; |
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r.d[0] = SIZEOF_etherdata; |
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Execute68kTrap(0xa71e, &r); // NewPtrSysClear() |
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if (r.a[0] == 0) |
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return openErr; |
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ether_data = r.a[0]; |
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D(bug(" data %08x\n", ether_data)); |
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|
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WriteMacInt16(ether_data + ed_DeferredTask + qType, dtQType); |
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WriteMacInt32(ether_data + ed_DeferredTask + dtAddr, ether_data + ed_Code); |
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WriteMacInt32(ether_data + ed_DeferredTask + dtParam, ether_data + ed_Result); |
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// Deferred function for signalling that packet write is complete (pointer to mydtResult in a1) |
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WriteMacInt16(ether_data + ed_Code, 0x2019); // move.l (a1)+,d0 (result) |
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WriteMacInt16(ether_data + ed_Code + 2, 0x2251); // move.l (a1),a1 (dce) |
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WriteMacInt32(ether_data + ed_Code + 4, 0x207808fc); // move.l JIODone,a0 |
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WriteMacInt16(ether_data + ed_Code + 8, 0x4ed0); // jmp (a0) |
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|
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WriteMacInt32(ether_data + ed_DCE, dce); |
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// ReadPacket/ReadRest routines |
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WriteMacInt16(ether_data + ed_ReadPacket, 0x6010); // bra 2 |
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WriteMacInt16(ether_data + ed_ReadPacket + 2, 0x3003); // move.w d3,d0 |
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WriteMacInt16(ether_data + ed_ReadPacket + 4, 0x9041); // sub.w d1,d0 |
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WriteMacInt16(ether_data + ed_ReadPacket + 6, 0x4a43); // tst.w d3 |
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WriteMacInt16(ether_data + ed_ReadPacket + 8, 0x6702); // beq 1 |
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WriteMacInt16(ether_data + ed_ReadPacket + 10, M68K_EMUL_OP_ETHER_READ_PACKET); |
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WriteMacInt16(ether_data + ed_ReadPacket + 12, 0x3600); //1 move.w d0,d3 |
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WriteMacInt16(ether_data + ed_ReadPacket + 14, 0x7000); // moveq #0,d0 |
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WriteMacInt16(ether_data + ed_ReadPacket + 16, 0x4e75); // rts |
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WriteMacInt16(ether_data + ed_ReadPacket + 18, M68K_EMUL_OP_ETHER_READ_PACKET); //2 |
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WriteMacInt16(ether_data + ed_ReadPacket + 20, 0x4a43); // tst.w d3 |
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WriteMacInt16(ether_data + ed_ReadPacket + 22, 0x4e75); // rts |
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return 0; |
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} |
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|
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|
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/* |
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* Driver Control() routine |
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*/ |
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|
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int16 EtherControl(uint32 pb, uint32 dce) |
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{ |
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uint16 code = ReadMacInt16(pb + csCode); |
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D(bug("EtherControl %d\n", code)); |
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switch (code) { |
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case 1: // KillIO |
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return -1; |
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|
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case kENetAddMulti: // Add multicast address |
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D(bug(" AddMulti %08x%04x\n", ReadMacInt32(pb + eMultiAddr), ReadMacInt16(pb + eMultiAddr + 4))); |
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if (net_open && !udp_tunnel) |
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return ether_add_multicast(pb); |
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return noErr; |
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|
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case kENetDelMulti: // Delete multicast address |
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D(bug(" DelMulti %08x%04x\n", ReadMacInt32(pb + eMultiAddr), ReadMacInt16(pb + eMultiAddr + 4))); |
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if (net_open && !udp_tunnel) |
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return ether_del_multicast(pb); |
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return noErr; |
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|
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case kENetAttachPH: { // Attach protocol handler |
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uint16 type = ReadMacInt16(pb + eProtType); |
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uint32 handler = ReadMacInt32(pb + ePointer); |
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D(bug(" AttachPH prot %04x, handler %08x\n", type, handler)); |
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if (net_open) { |
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if (udp_tunnel) { |
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if (udp_protocols.find(type) != udp_protocols.end()) |
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return lapProtErr; |
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udp_protocols[type] = handler; |
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} else |
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return ether_attach_ph(type, handler); |
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} |
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return noErr; |
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} |
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|
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case kENetDetachPH: { // Detach protocol handler |
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uint16 type = ReadMacInt16(pb + eProtType); |
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D(bug(" DetachPH prot %04x\n", type)); |
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if (net_open) { |
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if (udp_tunnel) { |
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if (udp_protocols.erase(type) == 0) |
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return lapProtErr; |
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} else |
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return ether_detach_ph(type); |
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} |
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return noErr; |
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} |
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|
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case kENetWrite: { // Transmit raw Ethernet packet |
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uint32 wds = ReadMacInt32(pb + ePointer); |
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D(bug(" EtherWrite\n")); |
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if (ReadMacInt16(wds) < 14) |
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return eLenErr; // Header incomplete |
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if (net_open) { |
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#if SUPPORTS_UDP_TUNNEL |
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if (udp_tunnel) { |
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|
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// Copy packet to buffer |
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uint8 packet[1514]; |
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int len = ether_wds_to_buffer(wds, packet); |
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|
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// Set source address and extract destination address |
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memcpy(packet + 6, ether_addr, 6); |
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uint32 dest_ip; |
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if (packet[0] == 'B' && packet[1] == '2') |
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dest_ip = (packet[2] << 24) | (packet[3] << 16) | (packet[4] << 8) | packet[5]; |
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else if (is_apple_talk_broadcast(packet)) |
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dest_ip = INADDR_BROADCAST; |
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else |
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return eMultiErr; |
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|
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#if MONITOR |
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bug("Sending Ethernet packet:\n"); |
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for (int i=0; i<len; i++) { |
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bug("%02x ", packet[i]); |
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} |
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bug("\n"); |
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#endif |
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|
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// Send packet |
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struct sockaddr_in sa; |
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sa.sin_family = AF_INET; |
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sa.sin_addr.s_addr = htonl(dest_ip); |
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sa.sin_port = htons(udp_port); |
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if (sendto(udp_socket, packet, len, 0, (struct sockaddr *)&sa, sizeof(sa)) < 0) { |
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D(bug("WARNING: Couldn't transmit packet\n")); |
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return excessCollsns; |
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} |
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} else |
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#endif |
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return ether_write(wds); |
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} |
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return noErr; |
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} |
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|
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case kENetGetInfo: { // Get device information/statistics |
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D(bug(" GetInfo buf %08x, size %d\n", ReadMacInt32(pb + ePointer), ReadMacInt16(pb + eBuffSize))); |
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|
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// Collect info (only ethernet address) |
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uint8 buf[18]; |
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memset(buf, 0, 18); |
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memcpy(buf, ether_addr, 6); |
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|
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// Transfer info to supplied buffer |
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int16 size = ReadMacInt16(pb + eBuffSize); |
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if (size > 18) |
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size = 18; |
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WriteMacInt16(pb + eDataSize, size); // Number of bytes actually written |
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Host2Mac_memcpy(ReadMacInt32(pb + ePointer), buf, size); |
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return noErr; |
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} |
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|
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case kENetSetGeneral: // Set general mode (always in general mode) |
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D(bug(" SetGeneral\n")); |
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return noErr; |
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|
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default: |
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printf("WARNING: Unknown EtherControl(%d)\n", code); |
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return controlErr; |
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} |
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} |
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|
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|
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/* |
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* Ethernet ReadPacket routine |
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*/ |
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|
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void EtherReadPacket(uint8 **src, uint32 &dest, uint32 &len, uint32 &remaining) |
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{ |
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D(bug("EtherReadPacket src %p, dest %08x, len %08x, remaining %08x\n", *src, dest, len, remaining)); |
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uint32 todo = len > remaining ? remaining : len; |
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Host2Mac_memcpy(dest, *src, todo); |
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*src += todo; |
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dest += todo; |
| 366 |
len -= todo; |
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remaining -= todo; |
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} |
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|
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|
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#if SUPPORTS_UDP_TUNNEL |
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/* |
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* Read packet from UDP socket |
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*/ |
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|
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void ether_udp_read(uint8 *packet, int length, struct sockaddr_in *from) |
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{ |
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// Drop packets sent by us |
| 379 |
if (memcmp(packet + 6, ether_addr, 6) == 0) |
| 380 |
return; |
| 381 |
|
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#if MONITOR |
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bug("Receiving Ethernet packet:\n"); |
| 384 |
for (int i=0; i<length; i++) { |
| 385 |
bug("%02x ", packet[i]); |
| 386 |
} |
| 387 |
bug("\n"); |
| 388 |
#endif |
| 389 |
|
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// Get packet type |
| 391 |
uint16 type = (packet[12] << 8) | packet[13]; |
| 392 |
|
| 393 |
// Look for protocol |
| 394 |
uint16 search_type = (type <= 1500 ? 0 : type); |
| 395 |
if (udp_protocols.find(search_type) == udp_protocols.end()) |
| 396 |
return; |
| 397 |
uint32 handler = udp_protocols[search_type]; |
| 398 |
if (handler == 0) |
| 399 |
return; |
| 400 |
|
| 401 |
// Copy header to RHA |
| 402 |
Host2Mac_memcpy(ether_data + ed_RHA, packet, 14); |
| 403 |
D(bug(" header %08x%04x %08x%04x %04x\n", ReadMacInt32(ether_data + ed_RHA), ReadMacInt16(ether_data + ed_RHA + 4), ReadMacInt32(ether_data + ed_RHA + 6), ReadMacInt16(ether_data + ed_RHA + 10), ReadMacInt16(ether_data + ed_RHA + 12))); |
| 404 |
|
| 405 |
// Call protocol handler |
| 406 |
M68kRegisters r; |
| 407 |
r.d[0] = type; // Packet type |
| 408 |
r.d[1] = length - 14; // Remaining packet length (without header, for ReadPacket) |
| 409 |
r.a[0] = (uint32)packet + 14; // Pointer to packet (host address, for ReadPacket) |
| 410 |
r.a[3] = ether_data + ed_RHA + 14; // Pointer behind header in RHA |
| 411 |
r.a[4] = ether_data + ed_ReadPacket; // Pointer to ReadPacket/ReadRest routines |
| 412 |
D(bug(" calling protocol handler %08x, type %08x, length %08x, data %08x, rha %08x, read_packet %08x\n", handler, r.d[0], r.d[1], r.a[0], r.a[3], r.a[4])); |
| 413 |
Execute68k(handler, &r); |
| 414 |
} |
| 415 |
#endif |
