src/BeOS/ether_beos.cpp

/*
 *  ether_beos.cpp - Ethernet device driver, BeOS specific stuff
 *
 *  Basilisk II (C) 1997-2001 Christian Bauer
 *  Portions (C) 1997-1999 Marc Hellwig
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <KernelKit.h>
#include <AppKit.h>
#include <StorageKit.h>
#include <support/List.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "sysdeps.h"
#include "cpu_emulation.h"
#include "main.h"
#include "prefs.h"
#include "user_strings.h"
#include "macos_util.h"
#include "ether.h"
#include "ether_defs.h"

#include "sheep_net.h"

#define DEBUG 0
#include "debug.h"

#define MONITOR 0


// List of attached protocols
struct NetProtocol {
        uint16 type;
        uint32 handler;
};

static BList prot_list;


// Global variables
static thread_id read_thread;                           // Packet reception thread
static bool ether_thread_active = true;         // Flag for quitting the reception thread

static area_id buffer_area;                                     // Packet buffer area
static net_buffer *net_buffer_ptr;                      // Pointer to packet buffer
static uint32 rd_pos;                                           // Current read position in packet buffer
static uint32 wr_pos;                                           // Current write position in packet buffer
static sem_id read_sem, write_sem;                      // Semaphores to trigger packet reading/writing


// Prototypes
static status_t receive_proc(void *data);


/*
 *  Find protocol in list
 */

static NetProtocol *find_protocol(uint16 type)
{
        // All 802.2 types are the same
        if (type <= 1500)
                type = 0;

        // Search list (we could use hashing here but there are usually only three
        // handlers installed: 0x0000 for AppleTalk and 0x0800/0x0806 for TCP/IP)
        NetProtocol *p;
        for (int i=0; (p = (NetProtocol *)prot_list.ItemAt(i)) != NULL; i++)
                if (p->type == type)
                        return p;
        return NULL;
}


/*
 *  Remove all protocols
 */

static void remove_all_protocols(void)
{
        NetProtocol *p;
        while ((p = (NetProtocol *)prot_list.RemoveItem((long)0)) != NULL)
                delete p;
}


/*
 *  Initialization
 */

bool ether_init(void)
{
        // Do nothing if no Ethernet device specified
        if (PrefsFindString("ether") == NULL)
                return false;

        // Find net_server team
i_wanna_try_that_again:
        bool found_add_on = false;
        team_info t_info;
        int32 t_cookie = 0;
        image_info i_info;
        int32 i_cookie = 0;
        while (get_next_team_info(&t_cookie, &t_info) == B_NO_ERROR) {
                if (strstr(t_info.args,"net_server")!=NULL) {

                        // Check if sheep_net add-on is loaded
                        while (get_next_image_info(t_info.team, &i_cookie, &i_info) == B_NO_ERROR) {
                                if (strstr(i_info.name, "sheep_net") != NULL) {
                                        found_add_on = true;
                                        break;                                  
                                }
                        }
                } 
                if (found_add_on) break;
        }
        if (!found_add_on) {

                // Search for sheep_net in network config file
                char str[1024];
                bool sheep_net_found = false;
                FILE *fin = fopen("/boot/home/config/settings/network", "r");
                while (!feof(fin)) {
                        fgets(str, 1024, fin);
                        if (strstr(str, "PROTOCOLS"))
                                if (strstr(str, "sheep_net"))
                                        sheep_net_found = true;
                }
                fclose(fin);

                // It was found, so something else must be wrong
                if (sheep_net_found) {
                        WarningAlert(GetString(STR_NO_NET_ADDON_WARN));
                        return false;
                }

                // Not found, inform the user
                if (!ChoiceAlert(GetString(STR_NET_CONFIG_MODIFY_WARN), GetString(STR_OK_BUTTON), GetString(STR_CANCEL_BUTTON)))
                        return false;

                // Change the network config file and restart the network
                fin = fopen("/boot/home/config/settings/network", "r");
                FILE *fout = fopen("/boot/home/config/settings/network.2", "w");
                bool global_found = false;
                bool modified = false;
                while (!feof(fin)) {
                        str[0] = 0;
                        fgets(str, 1024, fin);
                        if (!global_found && strstr(str, "GLOBAL:")) {
                                global_found = true;
                        } else if (global_found && !modified && strstr(str, "PROTOCOLS")) {
                                str[strlen(str)-1] = 0;
                                strcat(str, " sheep_net\n");
                                modified = true;
                        } else if (global_found && !modified && strlen(str) > 2 && str[strlen(str) - 2] == ':') {
                                fputs("\tPROTOCOLS = sheep_net\n", fout);
                                modified = true;
                        }
                        fputs(str, fout);
                }
                if (!modified)
                        fputs("\tPROTOCOLS = sheep_net\n", fout);
                fclose(fout);
                fclose(fin);
                remove("/boot/home/config/settings/network.orig");
                rename("/boot/home/config/settings/network", "/boot/home/config/settings/network.orig");
                rename("/boot/home/config/settings/network.2", "/boot/home/config/settings/network");

                app_info ai;
                if (be_roster->GetAppInfo("application/x-vnd.Be-NETS", &ai) == B_OK) {
                        BMessenger msg(NULL, ai.team);
                        if (msg.IsValid()) {
                                while (be_roster->IsRunning("application/x-vnd.Be-NETS")) {
                                        msg.SendMessage(B_QUIT_REQUESTED);
                                        snooze(500000);
                                }
                        }
                }
                BPath path;
                find_directory(B_BEOS_BOOT_DIRECTORY, &path);
                path.Append("Netscript");
                const char *argv[3] = {"/bin/sh", path.Path(), NULL};
                thread_id net_server = load_image(2, argv, (const char **)environ);
                resume_thread(net_server);
                status_t l;
                wait_for_thread(net_server, &l);
                goto i_wanna_try_that_again;
        }

        // Set up communications with add-on
        area_id handler_buffer;
        if ((handler_buffer = find_area("packet buffer")) < B_NO_ERROR) {
                WarningAlert(GetString(STR_NET_ADDON_INIT_FAILED));
                return false;
        }
        if ((buffer_area = clone_area("local packet buffer", (void **)&net_buffer_ptr, B_ANY_ADDRESS, B_READ_AREA | B_WRITE_AREA, handler_buffer)) < B_NO_ERROR) {
                D(bug("EtherInit: couldn't clone packet area\n"));
                WarningAlert(GetString(STR_NET_ADDON_CLONE_FAILED));
                return false;
        }
        if ((read_sem = create_sem(0, "ether read")) < B_NO_ERROR) {
                printf("FATAL: can't create Ethernet semaphore\n");
                return false;
        }
        net_buffer_ptr->read_sem = read_sem;
        write_sem = net_buffer_ptr->write_sem;
        read_thread = spawn_thread(receive_proc, "Ethernet Receiver", B_URGENT_DISPLAY_PRIORITY, NULL);
        resume_thread(read_thread);
        for (int i=0; i<WRITE_PACKET_COUNT; i++)
                net_buffer_ptr->write[i].cmd = IN_USE | (ACTIVATE_SHEEP_NET << 8);
        rd_pos = wr_pos = 0;
        release_sem(write_sem);

        // Get Ethernet address
        memcpy(ether_addr, net_buffer_ptr->ether_addr, 6);
        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]));

        // Everything OK
        return true;
}


/*
 *  Deinitialization
 */

void ether_exit(void)
{
        // Close communications with add-on
        for (int i=0; i<WRITE_PACKET_COUNT; i++)
                net_buffer_ptr->write[i].cmd = IN_USE | (DEACTIVATE_SHEEP_NET << 8);
        release_sem(write_sem);

        // Quit reception thread
        ether_thread_active = false;
        status_t result;
        release_sem(read_sem);
        wait_for_thread(read_thread, &result);

        delete_sem(read_sem);
        delete_area(buffer_area);

        // Remove all protocols
        remove_all_protocols();
}


/*
 *  Reset
 */

void ether_reset(void)
{
        remove_all_protocols();
}


/*
 *  Add multicast address
 */

int16 ether_add_multicast(uint32 pb)
{
        net_packet *p = &net_buffer_ptr->write[wr_pos];
        if (p->cmd & IN_USE) {
                D(bug("WARNING: Couldn't enable multicast address\n"));
        } else {
                Mac2Host_memcpy(p->data, pb + eMultiAddr, 6);
                p->length = 6;
                p->cmd = IN_USE | (ADD_MULTICAST << 8);
                wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
                release_sem(write_sem);
        }
        return noErr;
}


/*
 *  Delete multicast address
 */

int16 ether_del_multicast(uint32 pb)
{
        net_packet *p = &net_buffer_ptr->write[wr_pos];
        if (p->cmd & IN_USE) {
                D(bug("WARNING: Couldn't enable multicast address\n"));
        } else {
                Mac2Host_memcpy(p->data, pb + eMultiAddr, 6);
                p->length = 6;
                p->cmd = IN_USE | (REMOVE_MULTICAST << 8);
                wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
                release_sem(write_sem);
        }
        return noErr;
}


/*
 *  Attach protocol handler
 */

int16 ether_attach_ph(uint16 type, uint32 handler)
{
        // Already attached?
        NetProtocol *p = find_protocol(type);
        if (p != NULL)
                return lapProtErr;
        else {
                // No, create and attach
                p = new NetProtocol;
                p->type = type;
                p->handler = handler;
                prot_list.AddItem(p);
                return noErr;
        }
}


/*
 *  Detach protocol handler
 */

int16 ether_detach_ph(uint16 type)
{
        NetProtocol *p = find_protocol(type);
        if (p != NULL) {
                prot_list.RemoveItem(p);
                delete p;
                return noErr;
        } else
                return lapProtErr;
}


/*
 *  Transmit raw ethernet packet
 */

int16 ether_write(uint32 wds)
{
        net_packet *p = &net_buffer_ptr->write[wr_pos];
        if (p->cmd & IN_USE) {
                D(bug("WARNING: Couldn't transmit packet (buffer full)\n"));
        } else {

                // Copy packet to buffer
                int len = ether_wds_to_buffer(wds, p->data);

#if MONITOR
                bug("Sending Ethernet packet:\n");
                for (int i=0; i<len; i++) {
                        bug("%02x ", p->data[i]);
                }
                bug("\n");
#endif

                // Notify add-on
                p->length = len;
                p->cmd = IN_USE | (SHEEP_PACKET << 8);
                wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
                release_sem(write_sem);
        }
        return noErr;
}


/*
 *  Packet reception thread
 */

static status_t receive_proc(void *data)
{
        while (ether_thread_active) {
                if (net_buffer_ptr->read[rd_pos].cmd & IN_USE) {
                        D(bug(" packet received, triggering Ethernet interrupt\n"));
                        SetInterruptFlag(INTFLAG_ETHER);
                        TriggerInterrupt();
                }
                acquire_sem_etc(read_sem, 1, B_TIMEOUT, 25000);
        }
        return 0;
}


/*
 *  Ethernet interrupt - activate deferred tasks to call IODone or protocol handlers
 */

void EtherInterrupt(void)
{
        D(bug("EtherIRQ\n"));

        // Call protocol handler for received packets
        net_packet *p = &net_buffer_ptr->read[rd_pos];
        while (p->cmd & IN_USE) {
                if ((p->cmd >> 8) == SHEEP_PACKET) {
#if MONITOR
                        bug("Receiving Ethernet packet:\n");
                        for (int i=0; i<p->length; i++) {
                                bug("%02x ", p->data[i]);
                        }
                        bug("\n");
#endif
                        // Get packet type
                        uint16 type = ntohs(*(uint16 *)(p->data + 12));

                        // Look for protocol
                        NetProtocol *prot = find_protocol(type);
                        if (prot == NULL)
                                goto next;

                        // No default handler
                        if (prot->handler == 0)
                                goto next;

                        // Copy header to RHA
                        Host2Mac_memcpy(ether_data + ed_RHA, p->data, 14);
                        D(bug(" header %08lx%04lx %08lx%04lx %04lx\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)));

                        // Call protocol handler
                        M68kRegisters r;
                        r.d[0] = type;                                                                  // Packet type
                        r.d[1] = p->length - 14;                                                // Remaining packet length (without header, for ReadPacket)
                        r.a[0] = (uint32)p->data + 14;                                  // Pointer to packet (host address, for ReadPacket)
                        r.a[3] = ether_data + ed_RHA + 14;                              // Pointer behind header in RHA
                        r.a[4] = ether_data + ed_ReadPacket;                    // Pointer to ReadPacket/ReadRest routines
                        D(bug(" calling protocol handler %08lx, type %08lx, length %08lx, data %08lx, rha %08lx, read_packet %08lx\n", prot->handler, r.d[0], r.d[1], r.a[0], r.a[3], r.a[4]));
                        Execute68k(prot->handler, &r);
                }
next:   p->cmd = 0;     // Free packet
                rd_pos = (rd_pos + 1) % READ_PACKET_COUNT;
                p = &net_buffer_ptr->read[rd_pos];
        }
        D(bug(" EtherIRQ done\n"));
}
Revision:	1.8
Committed:	2001-07-13T18:49:28Z (22 years, 10 months ago) by cebix
Branch:	MAIN
Changes since 1.7:	+0 -3 lines
Log Message:	- outgoing packet source address is set in ether.cpp - UDP tunnelling sends packets to Ethernet broadcast address as IP broadcasts
#	User	Rev	Content
1	cebix	1.1	/*
2			* ether_beos.cpp - Ethernet device driver, BeOS specific stuff
3			*
4	cebix	1.5	* Basilisk II (C) 1997-2001 Christian Bauer
5	cebix	1.1	* Portions (C) 1997-1999 Marc Hellwig
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20			*/
21
22			#include <KernelKit.h>
23			#include <AppKit.h>
24			#include <StorageKit.h>
25			#include <support/List.h>
26
27			#include <stdio.h>
28			#include <stdlib.h>
29			#include <string.h>
30
31			#include "sysdeps.h"
32			#include "cpu_emulation.h"
33			#include "main.h"
34			#include "prefs.h"
35			#include "user_strings.h"
36			#include "macos_util.h"
37			#include "ether.h"
38			#include "ether_defs.h"
39
40			#include "sheep_net.h"
41
42			#define DEBUG 0
43			#include "debug.h"
44
45			#define MONITOR 0
46
47
48			// List of attached protocols
49			struct NetProtocol {
50			uint16 type;
51			uint32 handler;
52			};
53
54			static BList prot_list;
55
56
57			// Global variables
58			static thread_id read_thread; // Packet reception thread
59			static bool ether_thread_active = true; // Flag for quitting the reception thread
60
61			static area_id buffer_area; // Packet buffer area
62			static net_buffer *net_buffer_ptr; // Pointer to packet buffer
63			static uint32 rd_pos; // Current read position in packet buffer
64			static uint32 wr_pos; // Current write position in packet buffer
65			static sem_id read_sem, write_sem; // Semaphores to trigger packet reading/writing
66
67
68			// Prototypes
69			static status_t receive_proc(void *data);
70
71
72			/*
73			* Find protocol in list
74			*/
75
76			static NetProtocol *find_protocol(uint16 type)
77			{
78			// All 802.2 types are the same
79			if (type <= 1500)
80			type = 0;
81
82			// Search list (we could use hashing here but there are usually only three
83			// handlers installed: 0x0000 for AppleTalk and 0x0800/0x0806 for TCP/IP)
84			NetProtocol *p;
85			for (int i=0; (p = (NetProtocol *)prot_list.ItemAt(i)) != NULL; i++)
86			if (p->type == type)
87			return p;
88			return NULL;
89			}
90
91
92			/*
93	cebix	1.2	* Remove all protocols
94			*/
95
96			static void remove_all_protocols(void)
97			{
98			NetProtocol *p;
99			while ((p = (NetProtocol *)prot_list.RemoveItem((long)0)) != NULL)
100			delete p;
101			}
102
103
104			/*
105	cebix	1.1	* Initialization
106			*/
107
108	cebix	1.6	bool ether_init(void)
109	cebix	1.1	{
110			// Do nothing if no Ethernet device specified
111			if (PrefsFindString("ether") == NULL)
112	cebix	1.6	return false;
113	cebix	1.1
114			// Find net_server team
115			i_wanna_try_that_again:
116			bool found_add_on = false;
117			team_info t_info;
118			int32 t_cookie = 0;
119			image_info i_info;
120			int32 i_cookie = 0;
121			while (get_next_team_info(&t_cookie, &t_info) == B_NO_ERROR) {
122			if (strstr(t_info.args,"net_server")!=NULL) {
123
124			// Check if sheep_net add-on is loaded
125			while (get_next_image_info(t_info.team, &i_cookie, &i_info) == B_NO_ERROR) {
126			if (strstr(i_info.name, "sheep_net") != NULL) {
127			found_add_on = true;
128			break;
129			}
130			}
131			}
132			if (found_add_on) break;
133			}
134			if (!found_add_on) {
135
136			// Search for sheep_net in network config file
137			char str[1024];
138			bool sheep_net_found = false;
139			FILE *fin = fopen("/boot/home/config/settings/network", "r");
140			while (!feof(fin)) {
141			fgets(str, 1024, fin);
142			if (strstr(str, "PROTOCOLS"))
143			if (strstr(str, "sheep_net"))
144			sheep_net_found = true;
145			}
146			fclose(fin);
147
148			// It was found, so something else must be wrong
149			if (sheep_net_found) {
150			WarningAlert(GetString(STR_NO_NET_ADDON_WARN));
151	cebix	1.6	return false;
152	cebix	1.1	}
153
154			// Not found, inform the user
155			if (!ChoiceAlert(GetString(STR_NET_CONFIG_MODIFY_WARN), GetString(STR_OK_BUTTON), GetString(STR_CANCEL_BUTTON)))
156	cebix	1.6	return false;
157	cebix	1.1
158			// Change the network config file and restart the network
159			fin = fopen("/boot/home/config/settings/network", "r");
160			FILE *fout = fopen("/boot/home/config/settings/network.2", "w");
161			bool global_found = false;
162			bool modified = false;
163			while (!feof(fin)) {
164			str[0] = 0;
165			fgets(str, 1024, fin);
166			if (!global_found && strstr(str, "GLOBAL:")) {
167			global_found = true;
168			} else if (global_found && !modified && strstr(str, "PROTOCOLS")) {
169			str[strlen(str)-1] = 0;
170			strcat(str, " sheep_net\n");
171			modified = true;
172			} else if (global_found && !modified && strlen(str) > 2 && str[strlen(str) - 2] == ':') {
173			fputs("\tPROTOCOLS = sheep_net\n", fout);
174			modified = true;
175			}
176			fputs(str, fout);
177			}
178			if (!modified)
179			fputs("\tPROTOCOLS = sheep_net\n", fout);
180			fclose(fout);
181			fclose(fin);
182			remove("/boot/home/config/settings/network.orig");
183			rename("/boot/home/config/settings/network", "/boot/home/config/settings/network.orig");
184			rename("/boot/home/config/settings/network.2", "/boot/home/config/settings/network");
185
186			app_info ai;
187			if (be_roster->GetAppInfo("application/x-vnd.Be-NETS", &ai) == B_OK) {
188			BMessenger msg(NULL, ai.team);
189			if (msg.IsValid()) {
190			while (be_roster->IsRunning("application/x-vnd.Be-NETS")) {
191			msg.SendMessage(B_QUIT_REQUESTED);
192			snooze(500000);
193			}
194			}
195			}
196			BPath path;
197			find_directory(B_BEOS_BOOT_DIRECTORY, &path);
198			path.Append("Netscript");
199			const char *argv[3] = {"/bin/sh", path.Path(), NULL};
200			thread_id net_server = load_image(2, argv, (const char **)environ);
201			resume_thread(net_server);
202			status_t l;
203			wait_for_thread(net_server, &l);
204			goto i_wanna_try_that_again;
205			}
206
207			// Set up communications with add-on
208			area_id handler_buffer;
209			if ((handler_buffer = find_area("packet buffer")) < B_NO_ERROR) {
210			WarningAlert(GetString(STR_NET_ADDON_INIT_FAILED));
211	cebix	1.6	return false;
212	cebix	1.1	}
213			if ((buffer_area = clone_area("local packet buffer", (void **)&net_buffer_ptr, B_ANY_ADDRESS, B_READ_AREA \| B_WRITE_AREA, handler_buffer)) < B_NO_ERROR) {
214			D(bug("EtherInit: couldn't clone packet area\n"));
215			WarningAlert(GetString(STR_NET_ADDON_CLONE_FAILED));
216	cebix	1.6	return false;
217	cebix	1.1	}
218			if ((read_sem = create_sem(0, "ether read")) < B_NO_ERROR) {
219			printf("FATAL: can't create Ethernet semaphore\n");
220	cebix	1.6	return false;
221	cebix	1.1	}
222			net_buffer_ptr->read_sem = read_sem;
223			write_sem = net_buffer_ptr->write_sem;
224			read_thread = spawn_thread(receive_proc, "Ethernet Receiver", B_URGENT_DISPLAY_PRIORITY, NULL);
225			resume_thread(read_thread);
226			for (int i=0; i<WRITE_PACKET_COUNT; i++)
227			net_buffer_ptr->write[i].cmd = IN_USE \| (ACTIVATE_SHEEP_NET << 8);
228			rd_pos = wr_pos = 0;
229			release_sem(write_sem);
230
231			// Get Ethernet address
232			memcpy(ether_addr, net_buffer_ptr->ether_addr, 6);
233			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]));
234
235			// Everything OK
236	cebix	1.6	return true;
237	cebix	1.1	}
238
239
240			/*
241			* Deinitialization
242			*/
243
244	cebix	1.6	void ether_exit(void)
245	cebix	1.1	{
246	cebix	1.6	// Close communications with add-on
247			for (int i=0; i<WRITE_PACKET_COUNT; i++)
248			net_buffer_ptr->write[i].cmd = IN_USE \| (DEACTIVATE_SHEEP_NET << 8);
249			release_sem(write_sem);
250	cebix	1.1
251	cebix	1.6	// Quit reception thread
252			ether_thread_active = false;
253			status_t result;
254			release_sem(read_sem);
255			wait_for_thread(read_thread, &result);
256	cebix	1.1
257	cebix	1.6	delete_sem(read_sem);
258			delete_area(buffer_area);
259	cebix	1.1
260	cebix	1.6	// Remove all protocols
261			remove_all_protocols();
262	cebix	1.1	}
263
264
265			/*
266			* Reset
267			*/
268
269	cebix	1.7	void ether_reset(void)
270	cebix	1.1	{
271	cebix	1.2	remove_all_protocols();
272	cebix	1.1	}
273
274
275			/*
276			* Add multicast address
277			*/
278
279			int16 ether_add_multicast(uint32 pb)
280			{
281			net_packet *p = &net_buffer_ptr->write[wr_pos];
282			if (p->cmd & IN_USE) {
283			D(bug("WARNING: Couldn't enable multicast address\n"));
284			} else {
285	cebix	1.3	Mac2Host_memcpy(p->data, pb + eMultiAddr, 6);
286	cebix	1.1	p->length = 6;
287			p->cmd = IN_USE \| (ADD_MULTICAST << 8);
288			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
289			release_sem(write_sem);
290			}
291			return noErr;
292			}
293
294
295			/*
296			* Delete multicast address
297			*/
298
299			int16 ether_del_multicast(uint32 pb)
300			{
301			net_packet *p = &net_buffer_ptr->write[wr_pos];
302			if (p->cmd & IN_USE) {
303			D(bug("WARNING: Couldn't enable multicast address\n"));
304			} else {
305	cebix	1.3	Mac2Host_memcpy(p->data, pb + eMultiAddr, 6);
306	cebix	1.1	p->length = 6;
307			p->cmd = IN_USE \| (REMOVE_MULTICAST << 8);
308			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
309			release_sem(write_sem);
310			}
311			return noErr;
312			}
313
314
315			/*
316			* Attach protocol handler
317			*/
318
319			int16 ether_attach_ph(uint16 type, uint32 handler)
320			{
321			// Already attached?
322			NetProtocol *p = find_protocol(type);
323			if (p != NULL)
324			return lapProtErr;
325			else {
326			// No, create and attach
327			p = new NetProtocol;
328			p->type = type;
329			p->handler = handler;
330			prot_list.AddItem(p);
331			return noErr;
332			}
333			}
334
335
336			/*
337			* Detach protocol handler
338			*/
339
340			int16 ether_detach_ph(uint16 type)
341			{
342			NetProtocol *p = find_protocol(type);
343			if (p != NULL) {
344			prot_list.RemoveItem(p);
345			delete p;
346			return noErr;
347			} else
348			return lapProtErr;
349			}
350
351
352			/*
353			* Transmit raw ethernet packet
354			*/
355
356			int16 ether_write(uint32 wds)
357			{
358			net_packet *p = &net_buffer_ptr->write[wr_pos];
359			if (p->cmd & IN_USE) {
360			D(bug("WARNING: Couldn't transmit packet (buffer full)\n"));
361			} else {
362
363			// Copy packet to buffer
364	cebix	1.6	int len = ether_wds_to_buffer(wds, p->data);
365	cebix	1.1
366			#if MONITOR
367			bug("Sending Ethernet packet:\n");
368	cebix	1.6	for (int i=0; i<len; i++) {
369			bug("%02x ", p->data[i]);
370	cebix	1.1	}
371			bug("\n");
372			#endif
373
374			// Notify add-on
375	cebix	1.6	p->length = len;
376	cebix	1.1	p->cmd = IN_USE \| (SHEEP_PACKET << 8);
377			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
378			release_sem(write_sem);
379			}
380			return noErr;
381			}
382
383
384			/*
385			* Packet reception thread
386			*/
387
388			static status_t receive_proc(void *data)
389			{
390			while (ether_thread_active) {
391			if (net_buffer_ptr->read[rd_pos].cmd & IN_USE) {
392			D(bug(" packet received, triggering Ethernet interrupt\n"));
393			SetInterruptFlag(INTFLAG_ETHER);
394			TriggerInterrupt();
395			}
396			acquire_sem_etc(read_sem, 1, B_TIMEOUT, 25000);
397			}
398			return 0;
399			}
400
401
402			/*
403			* Ethernet interrupt - activate deferred tasks to call IODone or protocol handlers
404			*/
405
406			void EtherInterrupt(void)
407			{
408			D(bug("EtherIRQ\n"));
409
410			// Call protocol handler for received packets
411			net_packet *p = &net_buffer_ptr->read[rd_pos];
412			while (p->cmd & IN_USE) {
413			if ((p->cmd >> 8) == SHEEP_PACKET) {
414			#if MONITOR
415			bug("Receiving Ethernet packet:\n");
416			for (int i=0; i<p->length; i++) {
417			bug("%02x ", p->data[i]);
418			}
419			bug("\n");
420			#endif
421			// Get packet type
422			uint16 type = ntohs((uint16 )(p->data + 12));
423
424			// Look for protocol
425			NetProtocol *prot = find_protocol(type);
426			if (prot == NULL)
427			goto next;
428
429			// No default handler
430			if (prot->handler == 0)
431			goto next;
432
433			// Copy header to RHA
434	cebix	1.3	Host2Mac_memcpy(ether_data + ed_RHA, p->data, 14);
435	cebix	1.1	D(bug(" header %08lx%04lx %08lx%04lx %04lx\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)));
436
437			// Call protocol handler
438			M68kRegisters r;
439			r.d[0] = type; // Packet type
440			r.d[1] = p->length - 14; // Remaining packet length (without header, for ReadPacket)
441			r.a[0] = (uint32)p->data + 14; // Pointer to packet (host address, for ReadPacket)
442			r.a[3] = ether_data + ed_RHA + 14; // Pointer behind header in RHA
443			r.a[4] = ether_data + ed_ReadPacket; // Pointer to ReadPacket/ReadRest routines
444			D(bug(" calling protocol handler %08lx, type %08lx, length %08lx, data %08lx, rha %08lx, read_packet %08lx\n", prot->handler, r.d[0], r.d[1], r.a[0], r.a[3], r.a[4]));
445			Execute68k(prot->handler, &r);
446			}
447			next: p->cmd = 0; // Free packet
448			rd_pos = (rd_pos + 1) % READ_PACKET_COUNT;
449			p = &net_buffer_ptr->read[rd_pos];
450			}
451			D(bug(" EtherIRQ done\n"));
452			}