src/BeOS/ether_beos.cpp

/*
 *  ether_beos.cpp - Ethernet device driver, BeOS specific stuff
 *
 *  Basilisk II (C) 1997-2005 Christian Bauer
 *  Portions written by 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 "sysdeps.h"

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

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.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

static int fd = -1;                                                     // UDP socket fd
static bool udp_tunnel = false;


// 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 (non-UDP)
 */

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;
}


/*
 *  Packet reception thread (UDP)
 */

static status_t receive_proc_udp(void *data)
{
        while (ether_thread_active) {
                fd_set readfds;
                FD_ZERO(&readfds);
                FD_SET(fd, &readfds);
                struct timeval timeout;
                timeout.tv_sec = 1;
                timeout.tv_usec = 0;
                if (select(fd+1, &readfds, NULL, NULL, &timeout) > 0) {
                        D(bug(" packet received, triggering Ethernet interrupt\n"));
                        SetInterruptFlag(INTFLAG_ETHER);
                        TriggerInterrupt();
                }
        }
        return 0;
}


/*
 *  Start UDP packet reception thread
 */

bool ether_start_udp_thread(int socket_fd)
{
        fd = socket_fd;
        udp_tunnel = true;
        ether_thread_active = true;
        read_thread = spawn_thread(receive_proc_udp, "UDP Receiver", B_URGENT_DISPLAY_PRIORITY, NULL);
        resume_thread(read_thread);
        return true;
}


/*
 *  Stop UDP packet reception thread
 */

void ether_stop_udp_thread(void)
{
        ether_thread_active = false;
        status_t result;
        wait_for_thread(read_thread, &result);
}


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

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

        if (udp_tunnel) {

                uint8 packet[1514];
                ssize_t length;

                // Read packets from socket and hand to ether_udp_read() for processing
                while (true) {
                        struct sockaddr_in from;
                        socklen_t from_len = sizeof(from);
                        length = recvfrom(fd, packet, 1514, 0, (struct sockaddr *)&from, &from_len);
                        if (length < 14)
                                break;
                        ether_udp_read(packet, length, &from);
                }

        } else {

                // 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:	1.12
Committed:	2005-01-30T21:42:13Z (19 years, 3 months ago) by gbeauche
Branch:	MAIN
Changes since 1.11:	+1 -1 lines
Log Message:	Happy New Year!
#	User	Rev	Content
1	cebix	1.1	/*
2			* ether_beos.cpp - Ethernet device driver, BeOS specific stuff
3			*
4	gbeauche	1.12	* Basilisk II (C) 1997-2005 Christian Bauer
5	cebix	1.10	* Portions written by Marc Hellwig
6	cebix	1.1	*
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	cebix	1.9	#include "sysdeps.h"
23
24	cebix	1.1	#include <KernelKit.h>
25			#include <AppKit.h>
26			#include <StorageKit.h>
27			#include <support/List.h>
28
29			#include <stdio.h>
30			#include <stdlib.h>
31			#include <string.h>
32	cebix	1.9	#include <sys/socket.h>
33	cebix	1.1
34			#include "cpu_emulation.h"
35			#include "main.h"
36			#include "prefs.h"
37			#include "user_strings.h"
38			#include "macos_util.h"
39			#include "ether.h"
40			#include "ether_defs.h"
41
42			#include "sheep_net.h"
43
44			#define DEBUG 0
45			#include "debug.h"
46
47			#define MONITOR 0
48
49
50			// List of attached protocols
51			struct NetProtocol {
52			uint16 type;
53			uint32 handler;
54			};
55
56			static BList prot_list;
57
58
59			// Global variables
60			static thread_id read_thread; // Packet reception thread
61			static bool ether_thread_active = true; // Flag for quitting the reception thread
62
63			static area_id buffer_area; // Packet buffer area
64			static net_buffer *net_buffer_ptr; // Pointer to packet buffer
65			static uint32 rd_pos; // Current read position in packet buffer
66			static uint32 wr_pos; // Current write position in packet buffer
67			static sem_id read_sem, write_sem; // Semaphores to trigger packet reading/writing
68
69	cebix	1.9	static int fd = -1; // UDP socket fd
70			static bool udp_tunnel = false;
71
72	cebix	1.1
73			// Prototypes
74			static status_t receive_proc(void *data);
75
76
77			/*
78			* Find protocol in list
79			*/
80
81			static NetProtocol *find_protocol(uint16 type)
82			{
83			// All 802.2 types are the same
84			if (type <= 1500)
85			type = 0;
86
87			// Search list (we could use hashing here but there are usually only three
88			// handlers installed: 0x0000 for AppleTalk and 0x0800/0x0806 for TCP/IP)
89			NetProtocol *p;
90			for (int i=0; (p = (NetProtocol *)prot_list.ItemAt(i)) != NULL; i++)
91			if (p->type == type)
92			return p;
93			return NULL;
94			}
95
96
97			/*
98	cebix	1.2	* Remove all protocols
99			*/
100
101			static void remove_all_protocols(void)
102			{
103			NetProtocol *p;
104			while ((p = (NetProtocol *)prot_list.RemoveItem((long)0)) != NULL)
105			delete p;
106			}
107
108
109			/*
110	cebix	1.1	* Initialization
111			*/
112
113	cebix	1.6	bool ether_init(void)
114	cebix	1.1	{
115			// Do nothing if no Ethernet device specified
116			if (PrefsFindString("ether") == NULL)
117	cebix	1.6	return false;
118	cebix	1.1
119			// Find net_server team
120			i_wanna_try_that_again:
121			bool found_add_on = false;
122			team_info t_info;
123			int32 t_cookie = 0;
124			image_info i_info;
125			int32 i_cookie = 0;
126			while (get_next_team_info(&t_cookie, &t_info) == B_NO_ERROR) {
127			if (strstr(t_info.args,"net_server")!=NULL) {
128
129			// Check if sheep_net add-on is loaded
130			while (get_next_image_info(t_info.team, &i_cookie, &i_info) == B_NO_ERROR) {
131			if (strstr(i_info.name, "sheep_net") != NULL) {
132			found_add_on = true;
133			break;
134			}
135			}
136			}
137			if (found_add_on) break;
138			}
139			if (!found_add_on) {
140
141			// Search for sheep_net in network config file
142			char str[1024];
143			bool sheep_net_found = false;
144			FILE *fin = fopen("/boot/home/config/settings/network", "r");
145			while (!feof(fin)) {
146			fgets(str, 1024, fin);
147			if (strstr(str, "PROTOCOLS"))
148			if (strstr(str, "sheep_net"))
149			sheep_net_found = true;
150			}
151			fclose(fin);
152
153			// It was found, so something else must be wrong
154			if (sheep_net_found) {
155			WarningAlert(GetString(STR_NO_NET_ADDON_WARN));
156	cebix	1.6	return false;
157	cebix	1.1	}
158
159			// Not found, inform the user
160			if (!ChoiceAlert(GetString(STR_NET_CONFIG_MODIFY_WARN), GetString(STR_OK_BUTTON), GetString(STR_CANCEL_BUTTON)))
161	cebix	1.6	return false;
162	cebix	1.1
163			// Change the network config file and restart the network
164			fin = fopen("/boot/home/config/settings/network", "r");
165			FILE *fout = fopen("/boot/home/config/settings/network.2", "w");
166			bool global_found = false;
167			bool modified = false;
168			while (!feof(fin)) {
169			str[0] = 0;
170			fgets(str, 1024, fin);
171			if (!global_found && strstr(str, "GLOBAL:")) {
172			global_found = true;
173			} else if (global_found && !modified && strstr(str, "PROTOCOLS")) {
174			str[strlen(str)-1] = 0;
175			strcat(str, " sheep_net\n");
176			modified = true;
177			} else if (global_found && !modified && strlen(str) > 2 && str[strlen(str) - 2] == ':') {
178			fputs("\tPROTOCOLS = sheep_net\n", fout);
179			modified = true;
180			}
181			fputs(str, fout);
182			}
183			if (!modified)
184			fputs("\tPROTOCOLS = sheep_net\n", fout);
185			fclose(fout);
186			fclose(fin);
187			remove("/boot/home/config/settings/network.orig");
188			rename("/boot/home/config/settings/network", "/boot/home/config/settings/network.orig");
189			rename("/boot/home/config/settings/network.2", "/boot/home/config/settings/network");
190
191			app_info ai;
192			if (be_roster->GetAppInfo("application/x-vnd.Be-NETS", &ai) == B_OK) {
193			BMessenger msg(NULL, ai.team);
194			if (msg.IsValid()) {
195			while (be_roster->IsRunning("application/x-vnd.Be-NETS")) {
196			msg.SendMessage(B_QUIT_REQUESTED);
197			snooze(500000);
198			}
199			}
200			}
201			BPath path;
202			find_directory(B_BEOS_BOOT_DIRECTORY, &path);
203			path.Append("Netscript");
204			const char *argv[3] = {"/bin/sh", path.Path(), NULL};
205			thread_id net_server = load_image(2, argv, (const char **)environ);
206			resume_thread(net_server);
207			status_t l;
208			wait_for_thread(net_server, &l);
209			goto i_wanna_try_that_again;
210			}
211
212			// Set up communications with add-on
213			area_id handler_buffer;
214			if ((handler_buffer = find_area("packet buffer")) < B_NO_ERROR) {
215			WarningAlert(GetString(STR_NET_ADDON_INIT_FAILED));
216	cebix	1.6	return false;
217	cebix	1.1	}
218			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) {
219			D(bug("EtherInit: couldn't clone packet area\n"));
220			WarningAlert(GetString(STR_NET_ADDON_CLONE_FAILED));
221	cebix	1.6	return false;
222	cebix	1.1	}
223			if ((read_sem = create_sem(0, "ether read")) < B_NO_ERROR) {
224			printf("FATAL: can't create Ethernet semaphore\n");
225	cebix	1.6	return false;
226	cebix	1.1	}
227			net_buffer_ptr->read_sem = read_sem;
228			write_sem = net_buffer_ptr->write_sem;
229			read_thread = spawn_thread(receive_proc, "Ethernet Receiver", B_URGENT_DISPLAY_PRIORITY, NULL);
230			resume_thread(read_thread);
231			for (int i=0; i<WRITE_PACKET_COUNT; i++)
232			net_buffer_ptr->write[i].cmd = IN_USE \| (ACTIVATE_SHEEP_NET << 8);
233			rd_pos = wr_pos = 0;
234			release_sem(write_sem);
235
236			// Get Ethernet address
237			memcpy(ether_addr, net_buffer_ptr->ether_addr, 6);
238			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]));
239
240			// Everything OK
241	cebix	1.6	return true;
242	cebix	1.1	}
243
244
245			/*
246			* Deinitialization
247			*/
248
249	cebix	1.6	void ether_exit(void)
250	cebix	1.1	{
251	cebix	1.6	// Close communications with add-on
252			for (int i=0; i<WRITE_PACKET_COUNT; i++)
253			net_buffer_ptr->write[i].cmd = IN_USE \| (DEACTIVATE_SHEEP_NET << 8);
254			release_sem(write_sem);
255	cebix	1.1
256	cebix	1.6	// Quit reception thread
257			ether_thread_active = false;
258			status_t result;
259			release_sem(read_sem);
260			wait_for_thread(read_thread, &result);
261	cebix	1.1
262	cebix	1.6	delete_sem(read_sem);
263			delete_area(buffer_area);
264	cebix	1.1
265	cebix	1.6	// Remove all protocols
266			remove_all_protocols();
267	cebix	1.1	}
268
269
270			/*
271			* Reset
272			*/
273
274	cebix	1.7	void ether_reset(void)
275	cebix	1.1	{
276	cebix	1.2	remove_all_protocols();
277	cebix	1.1	}
278
279
280			/*
281			* Add multicast address
282			*/
283
284			int16 ether_add_multicast(uint32 pb)
285			{
286			net_packet *p = &net_buffer_ptr->write[wr_pos];
287			if (p->cmd & IN_USE) {
288			D(bug("WARNING: Couldn't enable multicast address\n"));
289			} else {
290	cebix	1.3	Mac2Host_memcpy(p->data, pb + eMultiAddr, 6);
291	cebix	1.1	p->length = 6;
292			p->cmd = IN_USE \| (ADD_MULTICAST << 8);
293			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
294			release_sem(write_sem);
295			}
296			return noErr;
297			}
298
299
300			/*
301			* Delete multicast address
302			*/
303
304			int16 ether_del_multicast(uint32 pb)
305			{
306			net_packet *p = &net_buffer_ptr->write[wr_pos];
307			if (p->cmd & IN_USE) {
308			D(bug("WARNING: Couldn't enable multicast address\n"));
309			} else {
310	cebix	1.3	Mac2Host_memcpy(p->data, pb + eMultiAddr, 6);
311	cebix	1.1	p->length = 6;
312			p->cmd = IN_USE \| (REMOVE_MULTICAST << 8);
313			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
314			release_sem(write_sem);
315			}
316			return noErr;
317			}
318
319
320			/*
321			* Attach protocol handler
322			*/
323
324			int16 ether_attach_ph(uint16 type, uint32 handler)
325			{
326			// Already attached?
327			NetProtocol *p = find_protocol(type);
328			if (p != NULL)
329			return lapProtErr;
330			else {
331			// No, create and attach
332			p = new NetProtocol;
333			p->type = type;
334			p->handler = handler;
335			prot_list.AddItem(p);
336			return noErr;
337			}
338			}
339
340
341			/*
342			* Detach protocol handler
343			*/
344
345			int16 ether_detach_ph(uint16 type)
346			{
347			NetProtocol *p = find_protocol(type);
348			if (p != NULL) {
349			prot_list.RemoveItem(p);
350			delete p;
351			return noErr;
352			} else
353			return lapProtErr;
354			}
355
356
357			/*
358			* Transmit raw ethernet packet
359			*/
360
361			int16 ether_write(uint32 wds)
362			{
363			net_packet *p = &net_buffer_ptr->write[wr_pos];
364			if (p->cmd & IN_USE) {
365			D(bug("WARNING: Couldn't transmit packet (buffer full)\n"));
366			} else {
367
368			// Copy packet to buffer
369	cebix	1.6	int len = ether_wds_to_buffer(wds, p->data);
370	cebix	1.1
371			#if MONITOR
372			bug("Sending Ethernet packet:\n");
373	cebix	1.6	for (int i=0; i<len; i++) {
374			bug("%02x ", p->data[i]);
375	cebix	1.1	}
376			bug("\n");
377			#endif
378
379			// Notify add-on
380	cebix	1.6	p->length = len;
381	cebix	1.1	p->cmd = IN_USE \| (SHEEP_PACKET << 8);
382			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
383			release_sem(write_sem);
384			}
385			return noErr;
386			}
387
388
389			/*
390	cebix	1.9	* Packet reception thread (non-UDP)
391	cebix	1.1	*/
392
393			static status_t receive_proc(void *data)
394			{
395			while (ether_thread_active) {
396			if (net_buffer_ptr->read[rd_pos].cmd & IN_USE) {
397			D(bug(" packet received, triggering Ethernet interrupt\n"));
398			SetInterruptFlag(INTFLAG_ETHER);
399			TriggerInterrupt();
400			}
401			acquire_sem_etc(read_sem, 1, B_TIMEOUT, 25000);
402			}
403			return 0;
404			}
405
406
407			/*
408	cebix	1.9	* Packet reception thread (UDP)
409			*/
410
411			static status_t receive_proc_udp(void *data)
412			{
413			while (ether_thread_active) {
414			fd_set readfds;
415			FD_ZERO(&readfds);
416			FD_SET(fd, &readfds);
417			struct timeval timeout;
418			timeout.tv_sec = 1;
419			timeout.tv_usec = 0;
420			if (select(fd+1, &readfds, NULL, NULL, &timeout) > 0) {
421			D(bug(" packet received, triggering Ethernet interrupt\n"));
422			SetInterruptFlag(INTFLAG_ETHER);
423			TriggerInterrupt();
424			}
425			}
426			return 0;
427			}
428
429
430			/*
431			* Start UDP packet reception thread
432			*/
433
434			bool ether_start_udp_thread(int socket_fd)
435			{
436			fd = socket_fd;
437			udp_tunnel = true;
438			ether_thread_active = true;
439			read_thread = spawn_thread(receive_proc_udp, "UDP Receiver", B_URGENT_DISPLAY_PRIORITY, NULL);
440			resume_thread(read_thread);
441			return true;
442			}
443
444
445			/*
446			* Stop UDP packet reception thread
447			*/
448
449			void ether_stop_udp_thread(void)
450			{
451			ether_thread_active = false;
452			status_t result;
453			wait_for_thread(read_thread, &result);
454			}
455
456
457			/*
458	cebix	1.1	* Ethernet interrupt - activate deferred tasks to call IODone or protocol handlers
459			*/
460
461			void EtherInterrupt(void)
462			{
463			D(bug("EtherIRQ\n"));
464
465	cebix	1.9	if (udp_tunnel) {
466
467			uint8 packet[1514];
468			ssize_t length;
469
470			// Read packets from socket and hand to ether_udp_read() for processing
471			while (true) {
472			struct sockaddr_in from;
473			socklen_t from_len = sizeof(from);
474			length = recvfrom(fd, packet, 1514, 0, (struct sockaddr *)&from, &from_len);
475			if (length < 14)
476			break;
477			ether_udp_read(packet, length, &from);
478			}
479
480			} else {
481
482			// Call protocol handler for received packets
483			net_packet *p = &net_buffer_ptr->read[rd_pos];
484			while (p->cmd & IN_USE) {
485			if ((p->cmd >> 8) == SHEEP_PACKET) {
486	cebix	1.1	#if MONITOR
487	cebix	1.9	bug("Receiving Ethernet packet:\n");
488			for (int i=0; i<p->length; i++) {
489			bug("%02x ", p->data[i]);
490			}
491			bug("\n");
492	cebix	1.1	#endif
493	cebix	1.9	// Get packet type
494			uint16 type = ntohs((uint16 )(p->data + 12));
495	cebix	1.1
496	cebix	1.9	// Look for protocol
497			NetProtocol *prot = find_protocol(type);
498			if (prot == NULL)
499			goto next;
500
501			// No default handler
502			if (prot->handler == 0)
503			goto next;
504
505			// Copy header to RHA
506			Host2Mac_memcpy(ether_data + ed_RHA, p->data, 14);
507			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)));
508
509			// Call protocol handler
510			M68kRegisters r;
511			r.d[0] = type; // Packet type
512			r.d[1] = p->length - 14; // Remaining packet length (without header, for ReadPacket)
513			r.a[0] = (uint32)p->data + 14; // Pointer to packet (host address, for ReadPacket)
514			r.a[3] = ether_data + ed_RHA + 14; // Pointer behind header in RHA
515			r.a[4] = ether_data + ed_ReadPacket; // Pointer to ReadPacket/ReadRest routines
516			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]));
517			Execute68k(prot->handler, &r);
518			}
519			next: p->cmd = 0; // Free packet
520			rd_pos = (rd_pos + 1) % READ_PACKET_COUNT;
521			p = &net_buffer_ptr->read[rd_pos];
522	cebix	1.1	}
523			}
524			D(bug(" EtherIRQ done\n"));
525			}