src/BeOS/ether_beos.cpp

/*
 *  ether_beos.cpp - Ethernet device driver, BeOS specific stuff
 *
 *  Basilisk II (C) 1997-1999 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;
}


/*
 *  Initialization
 */

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

        // 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;
                }

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

                // 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;
        }
        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;
        }
        if ((read_sem = create_sem(0, "ether read")) < B_NO_ERROR) {
                printf("FATAL: can't create Ethernet semaphore\n");
                return;
        }
        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
        net_open = true;
}


/*
 *  Deinitialization
 */

void EtherExit(void)
{
        if (net_open) {

                // 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
                NetProtocol *p;
                while ((p = (NetProtocol *)prot_list.RemoveItem((long)0)) != NULL)
                        delete p;
        }
}


/*
 *  Reset
 */

void EtherReset(void)
{
        // Remove all protocols
        NetProtocol *p;
        while ((p = (NetProtocol *)prot_list.RemoveItem((long)0)) != NULL)
                delete p;
}


/*
 *  Add multicast address
 */

int16 ether_add_multicast(uint32 pb)
{
        uint8 *addr = Mac2HostAddr(pb + eMultiAddr);
        net_packet *p = &net_buffer_ptr->write[wr_pos];
        if (p->cmd & IN_USE) {
                D(bug("WARNING: Couldn't enable multicast address\n"));
        } else {
                memcpy(p->data, addr, 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)
{
        uint8 *addr = Mac2HostAddr(pb + eMultiAddr);
        net_packet *p = &net_buffer_ptr->write[wr_pos];
        if (p->cmd & IN_USE) {
                D(bug("WARNING: Couldn't enable multicast address\n"));
        } else {
                memcpy(p->data, addr, 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
                uint8 *start;
                uint8 *bp = start = p->data;
                for (;;) {
                        int len = ReadMacInt16(wds);
                        if (len == 0)
                                break;
                        memcpy(bp, Mac2HostAddr(ReadMacInt32(wds + 2)), len);
                        bp += len;
                        wds += 6;
                }

                // Set source address
                memcpy(start + 6, ether_addr, 6);

#if MONITOR
                bug("Sending Ethernet packet:\n");
                for (int i=0; i<(uint32)(bp-start); i++) {
                        bug("%02x ", start[i]);
                }
                bug("\n");
#endif

                // Notify add-on
                p->length = (uint32)(bp - start);
                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
                        memcpy(Mac2HostAddr(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:	1.1
Committed:	1999-10-03T14:16:25Z (25 years, 1 month ago) by cebix
Branch:	MAIN
Branch point for:	cebix
Log Message:	Initial revision
#	User	Rev	Content
1	cebix	1.1	/*
2			* ether_beos.cpp - Ethernet device driver, BeOS specific stuff
3			*
4			* Basilisk II (C) 1997-1999 Christian Bauer
5			* 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			* Initialization
94			*/
95
96			void EtherInit(void)
97			{
98			// Do nothing if no Ethernet device specified
99			if (PrefsFindString("ether") == NULL)
100			return;
101
102			// Find net_server team
103			i_wanna_try_that_again:
104			bool found_add_on = false;
105			team_info t_info;
106			int32 t_cookie = 0;
107			image_info i_info;
108			int32 i_cookie = 0;
109			while (get_next_team_info(&t_cookie, &t_info) == B_NO_ERROR) {
110			if (strstr(t_info.args,"net_server")!=NULL) {
111
112			// Check if sheep_net add-on is loaded
113			while (get_next_image_info(t_info.team, &i_cookie, &i_info) == B_NO_ERROR) {
114			if (strstr(i_info.name, "sheep_net") != NULL) {
115			found_add_on = true;
116			break;
117			}
118			}
119			}
120			if (found_add_on) break;
121			}
122			if (!found_add_on) {
123
124			// Search for sheep_net in network config file
125			char str[1024];
126			bool sheep_net_found = false;
127			FILE *fin = fopen("/boot/home/config/settings/network", "r");
128			while (!feof(fin)) {
129			fgets(str, 1024, fin);
130			if (strstr(str, "PROTOCOLS"))
131			if (strstr(str, "sheep_net"))
132			sheep_net_found = true;
133			}
134			fclose(fin);
135
136			// It was found, so something else must be wrong
137			if (sheep_net_found) {
138			WarningAlert(GetString(STR_NO_NET_ADDON_WARN));
139			return;
140			}
141
142			// Not found, inform the user
143			if (!ChoiceAlert(GetString(STR_NET_CONFIG_MODIFY_WARN), GetString(STR_OK_BUTTON), GetString(STR_CANCEL_BUTTON)))
144			return;
145
146			// Change the network config file and restart the network
147			fin = fopen("/boot/home/config/settings/network", "r");
148			FILE *fout = fopen("/boot/home/config/settings/network.2", "w");
149			bool global_found = false;
150			bool modified = false;
151			while (!feof(fin)) {
152			str[0] = 0;
153			fgets(str, 1024, fin);
154			if (!global_found && strstr(str, "GLOBAL:")) {
155			global_found = true;
156			} else if (global_found && !modified && strstr(str, "PROTOCOLS")) {
157			str[strlen(str)-1] = 0;
158			strcat(str, " sheep_net\n");
159			modified = true;
160			} else if (global_found && !modified && strlen(str) > 2 && str[strlen(str) - 2] == ':') {
161			fputs("\tPROTOCOLS = sheep_net\n", fout);
162			modified = true;
163			}
164			fputs(str, fout);
165			}
166			if (!modified)
167			fputs("\tPROTOCOLS = sheep_net\n", fout);
168			fclose(fout);
169			fclose(fin);
170			remove("/boot/home/config/settings/network.orig");
171			rename("/boot/home/config/settings/network", "/boot/home/config/settings/network.orig");
172			rename("/boot/home/config/settings/network.2", "/boot/home/config/settings/network");
173
174			app_info ai;
175			if (be_roster->GetAppInfo("application/x-vnd.Be-NETS", &ai) == B_OK) {
176			BMessenger msg(NULL, ai.team);
177			if (msg.IsValid()) {
178			while (be_roster->IsRunning("application/x-vnd.Be-NETS")) {
179			msg.SendMessage(B_QUIT_REQUESTED);
180			snooze(500000);
181			}
182			}
183			}
184			BPath path;
185			find_directory(B_BEOS_BOOT_DIRECTORY, &path);
186			path.Append("Netscript");
187			const char *argv[3] = {"/bin/sh", path.Path(), NULL};
188			thread_id net_server = load_image(2, argv, (const char **)environ);
189			resume_thread(net_server);
190			status_t l;
191			wait_for_thread(net_server, &l);
192			goto i_wanna_try_that_again;
193			}
194
195			// Set up communications with add-on
196			area_id handler_buffer;
197			if ((handler_buffer = find_area("packet buffer")) < B_NO_ERROR) {
198			WarningAlert(GetString(STR_NET_ADDON_INIT_FAILED));
199			return;
200			}
201			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) {
202			D(bug("EtherInit: couldn't clone packet area\n"));
203			WarningAlert(GetString(STR_NET_ADDON_CLONE_FAILED));
204			return;
205			}
206			if ((read_sem = create_sem(0, "ether read")) < B_NO_ERROR) {
207			printf("FATAL: can't create Ethernet semaphore\n");
208			return;
209			}
210			net_buffer_ptr->read_sem = read_sem;
211			write_sem = net_buffer_ptr->write_sem;
212			read_thread = spawn_thread(receive_proc, "Ethernet Receiver", B_URGENT_DISPLAY_PRIORITY, NULL);
213			resume_thread(read_thread);
214			for (int i=0; i<WRITE_PACKET_COUNT; i++)
215			net_buffer_ptr->write[i].cmd = IN_USE \| (ACTIVATE_SHEEP_NET << 8);
216			rd_pos = wr_pos = 0;
217			release_sem(write_sem);
218
219			// Get Ethernet address
220			memcpy(ether_addr, net_buffer_ptr->ether_addr, 6);
221			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]));
222
223			// Everything OK
224			net_open = true;
225			}
226
227
228			/*
229			* Deinitialization
230			*/
231
232			void EtherExit(void)
233			{
234			if (net_open) {
235
236			// Close communications with add-on
237			for (int i=0; i<WRITE_PACKET_COUNT; i++)
238			net_buffer_ptr->write[i].cmd = IN_USE \| (DEACTIVATE_SHEEP_NET << 8);
239			release_sem(write_sem);
240
241			// Quit reception thread
242			ether_thread_active = false;
243			status_t result;
244			release_sem(read_sem);
245			wait_for_thread(read_thread, &result);
246
247			delete_sem(read_sem);
248			delete_area(buffer_area);
249
250			// Remove all protocols
251			NetProtocol *p;
252			while ((p = (NetProtocol *)prot_list.RemoveItem((long)0)) != NULL)
253			delete p;
254			}
255			}
256
257
258			/*
259			* Reset
260			*/
261
262			void EtherReset(void)
263			{
264			// Remove all protocols
265			NetProtocol *p;
266			while ((p = (NetProtocol *)prot_list.RemoveItem((long)0)) != NULL)
267			delete p;
268			}
269
270
271			/*
272			* Add multicast address
273			*/
274
275			int16 ether_add_multicast(uint32 pb)
276			{
277			uint8 *addr = Mac2HostAddr(pb + eMultiAddr);
278			net_packet *p = &net_buffer_ptr->write[wr_pos];
279			if (p->cmd & IN_USE) {
280			D(bug("WARNING: Couldn't enable multicast address\n"));
281			} else {
282			memcpy(p->data, addr, 6);
283			p->length = 6;
284			p->cmd = IN_USE \| (ADD_MULTICAST << 8);
285			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
286			release_sem(write_sem);
287			}
288			return noErr;
289			}
290
291
292			/*
293			* Delete multicast address
294			*/
295
296			int16 ether_del_multicast(uint32 pb)
297			{
298			uint8 *addr = Mac2HostAddr(pb + eMultiAddr);
299			net_packet *p = &net_buffer_ptr->write[wr_pos];
300			if (p->cmd & IN_USE) {
301			D(bug("WARNING: Couldn't enable multicast address\n"));
302			} else {
303			memcpy(p->data, addr, 6);
304			p->length = 6;
305			p->cmd = IN_USE \| (REMOVE_MULTICAST << 8);
306			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
307			release_sem(write_sem);
308			}
309			return noErr;
310			}
311
312
313			/*
314			* Attach protocol handler
315			*/
316
317			int16 ether_attach_ph(uint16 type, uint32 handler)
318			{
319			// Already attached?
320			NetProtocol *p = find_protocol(type);
321			if (p != NULL)
322			return lapProtErr;
323			else {
324			// No, create and attach
325			p = new NetProtocol;
326			p->type = type;
327			p->handler = handler;
328			prot_list.AddItem(p);
329			return noErr;
330			}
331			}
332
333
334			/*
335			* Detach protocol handler
336			*/
337
338			int16 ether_detach_ph(uint16 type)
339			{
340			NetProtocol *p = find_protocol(type);
341			if (p != NULL) {
342			prot_list.RemoveItem(p);
343			delete p;
344			return noErr;
345			} else
346			return lapProtErr;
347			}
348
349
350			/*
351			* Transmit raw ethernet packet
352			*/
353
354			int16 ether_write(uint32 wds)
355			{
356			net_packet *p = &net_buffer_ptr->write[wr_pos];
357			if (p->cmd & IN_USE) {
358			D(bug("WARNING: Couldn't transmit packet (buffer full)\n"));
359			} else {
360
361			// Copy packet to buffer
362			uint8 *start;
363			uint8 *bp = start = p->data;
364			for (;;) {
365			int len = ReadMacInt16(wds);
366			if (len == 0)
367			break;
368			memcpy(bp, Mac2HostAddr(ReadMacInt32(wds + 2)), len);
369			bp += len;
370			wds += 6;
371			}
372
373			// Set source address
374			memcpy(start + 6, ether_addr, 6);
375
376			#if MONITOR
377			bug("Sending Ethernet packet:\n");
378			for (int i=0; i<(uint32)(bp-start); i++) {
379			bug("%02x ", start[i]);
380			}
381			bug("\n");
382			#endif
383
384			// Notify add-on
385			p->length = (uint32)(bp - start);
386			p->cmd = IN_USE \| (SHEEP_PACKET << 8);
387			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
388			release_sem(write_sem);
389			}
390			return noErr;
391			}
392
393
394			/*
395			* Packet reception thread
396			*/
397
398			static status_t receive_proc(void *data)
399			{
400			while (ether_thread_active) {
401			if (net_buffer_ptr->read[rd_pos].cmd & IN_USE) {
402			D(bug(" packet received, triggering Ethernet interrupt\n"));
403			SetInterruptFlag(INTFLAG_ETHER);
404			TriggerInterrupt();
405			}
406			acquire_sem_etc(read_sem, 1, B_TIMEOUT, 25000);
407			}
408			return 0;
409			}
410
411
412			/*
413			* Ethernet interrupt - activate deferred tasks to call IODone or protocol handlers
414			*/
415
416			void EtherInterrupt(void)
417			{
418			D(bug("EtherIRQ\n"));
419
420			// Call protocol handler for received packets
421			net_packet *p = &net_buffer_ptr->read[rd_pos];
422			while (p->cmd & IN_USE) {
423			if ((p->cmd >> 8) == SHEEP_PACKET) {
424			#if MONITOR
425			bug("Receiving Ethernet packet:\n");
426			for (int i=0; i<p->length; i++) {
427			bug("%02x ", p->data[i]);
428			}
429			bug("\n");
430			#endif
431			// Get packet type
432			uint16 type = ntohs((uint16 )(p->data + 12));
433
434			// Look for protocol
435			NetProtocol *prot = find_protocol(type);
436			if (prot == NULL)
437			goto next;
438
439			// No default handler
440			if (prot->handler == 0)
441			goto next;
442
443			// Copy header to RHA
444			memcpy(Mac2HostAddr(ether_data + ed_RHA), p->data, 14);
445			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)));
446
447			// Call protocol handler
448			M68kRegisters r;
449			r.d[0] = type; // Packet type
450			r.d[1] = p->length - 14; // Remaining packet length (without header, for ReadPacket)
451			r.a[0] = (uint32)p->data + 14; // Pointer to packet (host address, for ReadPacket)
452			r.a[3] = ether_data + ed_RHA + 14; // Pointer behind header in RHA
453			r.a[4] = ether_data + ed_ReadPacket; // Pointer to ReadPacket/ReadRest routines
454			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]));
455			Execute68k(prot->handler, &r);
456			}
457			next: p->cmd = 0; // Free packet
458			rd_pos = (rd_pos + 1) % READ_PACKET_COUNT;
459			p = &net_buffer_ptr->read[rd_pos];
460			}
461			D(bug(" EtherIRQ done\n"));
462			}