BeOS/SheepNet/sheep_net.cpp

/*
 *  sheep_net.cpp - Net server add-on for SheepShaver and Basilisk II
 *
 *  SheepShaver (C) 1997-2001 Mar"c" Hellwig and Christian Bauer
 *  Basilisk II (C) 1997-2001 Christian Bauer
 *
 *  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 <SupportKit.h>
#include <add-ons/net_server/NetDevice.h>
#include <add-ons/net_server/NetProtocol.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>

#include "sheep_net.h"

#define DEBUG 0

#if DEBUG==1
#define bug pprintf
#elif DEBUG==2
#define bug kprintf
#endif

#if DEBUG
#define D(x) (x)
#else
#define D(x) ;
#endif

static int pprintf(const char* format, ...)
{
        port_id PortNum;
        int len,Ret;
        char Buffer[1024];
        va_list ap;
        
        if ((PortNum = find_port("PortLogger")) == B_NAME_NOT_FOUND)
                return(PortNum);
        for (len=0; len<1024; len++)
                Buffer[len]='\0'; 
        va_start(ap, format);
        vsprintf(Buffer, format, ap);
        Ret = write_port(PortNum, 0, Buffer, strlen(Buffer));
        return(Ret);
}


// Constants
#define NETDUMP_PRIO 1          // Default is 0

const uint32 buffer_size = (sizeof(net_buffer) / B_PAGE_SIZE + 1) * B_PAGE_SIZE;


// SheepNet add-on object
class SheepNetAddOn : public BNetProtocol, BPacketHandler {
public:
        void AddDevice(BNetDevice *dev, const char *name);
        bool PacketReceived(BNetPacket *buf, BNetDevice *dev);
};


// Global variables
static bool shutdown_now = false; 
static bool     active = false;

static thread_id write_thread;                  // Packet writer
static sem_id write_sem;                                // Semaphore to trigger packet writing
static BNetDevice *EtherCard = NULL;    // The Ethernet card we are attached to
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


/*
 *  Clear packet buffer
 */

static void clear(void)
{
        int i;
        for (i=0;i<READ_PACKET_COUNT;i++) {
                net_buffer_ptr->read[i].cmd = 0;
                net_buffer_ptr->read[i].length = 0;
                net_buffer_ptr->read[i].card = 0;
                net_buffer_ptr->read[i].reserved = 0;
        }
        for (i=0;i<WRITE_PACKET_COUNT;i++) {
                net_buffer_ptr->write[i].cmd = 0;
                net_buffer_ptr->write[i].length = 0;
                net_buffer_ptr->write[i].card = 0;
                net_buffer_ptr->write[i].reserved = 0;
        }
        rd_pos = wr_pos = 0;
}


/*
 *  Packet writer thread
 */

static status_t write_packet_func(void *arg)
{
        while (!shutdown_now) {

                // Read and execute command
                net_packet *p = &net_buffer_ptr->write[wr_pos];
                while (p->cmd & IN_USE) {
                        D(bug("wp: %d\n", wr_pos));
                        switch (p->cmd >> 8) {

                                case ACTIVATE_SHEEP_NET:
                                        D(bug("activate sheep-net\n"));
                                        active = false;
                                        clear();
                                        active = true;
                                        goto next;

                                case DEACTIVATE_SHEEP_NET:
                                        D(bug("deactivate sheep-net\n"));
                                        active = false;
                                        clear();
                                        goto next;

                                case SHUTDOWN_SHEEP_NET:
                                        D(bug("shutdown sheep-net\n"));
                                        active = false;
                                        clear();
                                        shutdown_now = true;
                                        goto next;

                                case ADD_MULTICAST: {
                                        const char *data = (const char *)p->data;
                                        D(bug("add multicast %02x %02x %02x %02x %02x %02x\n", data[0], data[1], data[2], data[3], data[4], data[5]));
                                        if (active) {
                                                status_t result;
                                                if ((result = EtherCard->AddMulticastAddress(data)) != B_OK) {
                                                        // !! handle error !! error while creating multicast address
                                                        D(bug("error while creating multicast address %d\n", result));
                                                }
                                        }
                                        break;
                                }

                                case REMOVE_MULTICAST: {
                                        const char *data = (const char *)p->data;
                                        D(bug("remove multicast %02x %02x %02x %02x %02x %02x\n", data[0], data[1], data[2], data[3], data[4], data[5]));
                                        if (active) {
                                                status_t result;
                                                if ((result = EtherCard->RemoveMulticastAddress(data)) != B_OK) {
                                                        // !! handle error !! error while removing multicast address
                                                        D(bug("error while removing multicast address %d\n", result));
                                                }
                                        }
                                        break;
                                }

                                case SHEEP_PACKET: {
                                        uint32 length = p->length;
                                        // D(bug("sheep packet %d\n", length));
                                        if (active) {
                                                BStandardPacket *packet = new BStandardPacket(length);
                                                packet->Write(0, (const char *)p->data, length);
                                                EtherCard->SendPacket(packet);
                                        }
                                        break;
                                }

                                default:
                                        D(bug("error: unknown port packet type\n"));
                                        break;
                        }
                        p->cmd = 0;     // Free packet                                  
                        wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
                        p = &net_buffer_ptr->write[wr_pos];
                }

                // Wait for next packet
next:   acquire_sem_etc(write_sem, 1, B_TIMEOUT, 25000);
        }
        return 0;
}


/*
 *  Init the net add-on
 */

static void init_addon()
{
        int i;
        D(bug("init sheep-net\n"));

        // Create packet buffer
        if ((buffer_area = create_area("packet buffer", (void **)&net_buffer_ptr, B_ANY_ADDRESS, buffer_size, B_FULL_LOCK, B_READ_AREA | B_WRITE_AREA)) < B_NO_ERROR) {
                D(bug("FATAL ERROR: can't create shared area\n"));
                return;
        }       

        // Init packet buffer
        clear();
        EtherCard->Address((char *)net_buffer_ptr->ether_addr);
        net_buffer_ptr->read_sem = -1;
        net_buffer_ptr->read_ofs = (uint32)(net_buffer_ptr->read) - (uint32)net_buffer_ptr;
        net_buffer_ptr->read_packet_size = sizeof(net_packet);
        net_buffer_ptr->read_packet_count = READ_PACKET_COUNT;
        if ((write_sem = create_sem(0, "ether write")) < B_NO_ERROR) {
                D(bug("FATAL ERROR: can't create semaphore\n"));
                return;
        }
        net_buffer_ptr->write_sem = write_sem;
        net_buffer_ptr->write_ofs = (uint32)(net_buffer_ptr->write) - (uint32)net_buffer_ptr;
        net_buffer_ptr->write_packet_size = sizeof(net_packet);
        net_buffer_ptr->write_packet_count = WRITE_PACKET_COUNT;

        // Start packet writer thread
        write_thread = spawn_thread(write_packet_func, "sheep_net ether write", B_URGENT_DISPLAY_PRIORITY, NULL);
        resume_thread(write_thread);
}


/*
 *  Add-on attached to Ethernet card
 */

void SheepNetAddOn::AddDevice(BNetDevice *dev, const char *name)
{
        if (dev->Type() != B_ETHER_NET_DEVICE)
                return;
        if (EtherCard != NULL) {
                // !! handle error !! support for multiple ethernet cards ...
                D(bug("error: SheepShaver doesn't support multiple Ethernetcards !\n"));
                return;
        }
        EtherCard = dev;
        init_addon();
        register_packet_handler(this, dev, NETDUMP_PRIO);
}


/*
 *  Ethernet packet received
 */

bool SheepNetAddOn::PacketReceived(BNetPacket *pkt, BNetDevice *dev)
{
        if (shutdown_now) {
                unregister_packet_handler(this, dev);
                return false;
        }
//      D(bug("read_packet_func %d\n", pkt->Size()));
        if (active) {
                D(bug("rp: %d\n", rd_pos));
                net_packet *p = &net_buffer_ptr->read[rd_pos];
                if (p->cmd & IN_USE) {
                        D(bug("error: full read buffer ... lost packet\n"));
                } else {
                        memcpy(p->data, pkt->Data(), pkt->Size());
                        p->length = pkt->Size();
                        p->cmd = IN_USE | (SHEEP_PACKET << 8);
                        rd_pos = (rd_pos + 1) % READ_PACKET_COUNT;
                        release_sem(net_buffer_ptr->read_sem);
                }
        }
        //D(bug("%02x %02x %02x %02x %02x %02x", (uchar) (pkt->Data())[0],(uchar) (pkt->Data())[1],(uchar) (pkt->Data())[2],(uchar) (pkt->Data())[3],(uchar) (pkt->Data())[4],(uchar) (pkt->Data())[5]));
        return false;
}

#pragma export on
extern "C" BNetProtocol *open_protocol(const char *device)
{
        SheepNetAddOn *dev = new SheepNetAddOn;
        return dev;
}
#pragma export off
Revision:	1.3
Committed:	2001-03-31T11:44:48Z (23 years, 7 months ago) by cebix
Branch:	MAIN
CVS Tags:	snapshot-29052001, release-0_9-1
Changes since 1.2:	+2 -2 lines
Log Message:	updated copyright dates
#	User	Rev	Content
1	cebix	1.1	/*
2			* sheep_net.cpp - Net server add-on for SheepShaver and Basilisk II
3			*
4	cebix	1.3	* SheepShaver (C) 1997-2001 Mar"c" Hellwig and Christian Bauer
5			* Basilisk II (C) 1997-2001 Christian Bauer
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			#include <KernelKit.h>
23			#include <SupportKit.h>
24			#include <add-ons/net_server/NetDevice.h>
25			#include <add-ons/net_server/NetProtocol.h>
26			#include <stdio.h>
27			#include <stdlib.h>
28			#include <stdarg.h>
29			#include <string.h>
30			#include <time.h>
31
32			#include "sheep_net.h"
33
34			#define DEBUG 0
35
36			#if DEBUG==1
37			#define bug pprintf
38			#elif DEBUG==2
39			#define bug kprintf
40			#endif
41
42			#if DEBUG
43			#define D(x) (x)
44			#else
45			#define D(x) ;
46			#endif
47
48			static int pprintf(const char* format, ...)
49			{
50			port_id PortNum;
51			int len,Ret;
52			char Buffer[1024];
53			va_list ap;
54
55			if ((PortNum = find_port("PortLogger")) == B_NAME_NOT_FOUND)
56			return(PortNum);
57			for (len=0; len<1024; len++)
58			Buffer[len]='\0';
59			va_start(ap, format);
60			vsprintf(Buffer, format, ap);
61			Ret = write_port(PortNum, 0, Buffer, strlen(Buffer));
62			return(Ret);
63			}
64
65
66			// Constants
67			#define NETDUMP_PRIO 1 // Default is 0
68
69			const uint32 buffer_size = (sizeof(net_buffer) / B_PAGE_SIZE + 1) * B_PAGE_SIZE;
70
71
72			// SheepNet add-on object
73			class SheepNetAddOn : public BNetProtocol, BPacketHandler {
74			public:
75			void AddDevice(BNetDevice dev, const char name);
76			bool PacketReceived(BNetPacket buf, BNetDevice dev);
77			};
78
79
80			// Global variables
81			static bool shutdown_now = false;
82			static bool active = false;
83
84			static thread_id write_thread; // Packet writer
85			static sem_id write_sem; // Semaphore to trigger packet writing
86			static BNetDevice *EtherCard = NULL; // The Ethernet card we are attached to
87			static area_id buffer_area; // Packet buffer area
88			static net_buffer *net_buffer_ptr; // Pointer to packet buffer
89
90			static uint32 rd_pos; // Current read position in packet buffer
91			static uint32 wr_pos; // Current write position in packet buffer
92
93
94			/*
95			* Clear packet buffer
96			*/
97
98			static void clear(void)
99			{
100			int i;
101			for (i=0;i<READ_PACKET_COUNT;i++) {
102			net_buffer_ptr->read[i].cmd = 0;
103			net_buffer_ptr->read[i].length = 0;
104			net_buffer_ptr->read[i].card = 0;
105			net_buffer_ptr->read[i].reserved = 0;
106			}
107			for (i=0;i<WRITE_PACKET_COUNT;i++) {
108			net_buffer_ptr->write[i].cmd = 0;
109			net_buffer_ptr->write[i].length = 0;
110			net_buffer_ptr->write[i].card = 0;
111			net_buffer_ptr->write[i].reserved = 0;
112			}
113			rd_pos = wr_pos = 0;
114			}
115
116
117			/*
118			* Packet writer thread
119			*/
120
121			static status_t write_packet_func(void *arg)
122			{
123			while (!shutdown_now) {
124
125			// Read and execute command
126			net_packet *p = &net_buffer_ptr->write[wr_pos];
127			while (p->cmd & IN_USE) {
128			D(bug("wp: %d\n", wr_pos));
129			switch (p->cmd >> 8) {
130
131			case ACTIVATE_SHEEP_NET:
132			D(bug("activate sheep-net\n"));
133			active = false;
134			clear();
135			active = true;
136			goto next;
137
138			case DEACTIVATE_SHEEP_NET:
139			D(bug("deactivate sheep-net\n"));
140			active = false;
141			clear();
142			goto next;
143
144			case SHUTDOWN_SHEEP_NET:
145			D(bug("shutdown sheep-net\n"));
146			active = false;
147			clear();
148			shutdown_now = true;
149			goto next;
150
151			case ADD_MULTICAST: {
152			const char data = (const char )p->data;
153			D(bug("add multicast %02x %02x %02x %02x %02x %02x\n", data[0], data[1], data[2], data[3], data[4], data[5]));
154			if (active) {
155			status_t result;
156			if ((result = EtherCard->AddMulticastAddress(data)) != B_OK) {
157			// !! handle error !! error while creating multicast address
158			D(bug("error while creating multicast address %d\n", result));
159			}
160			}
161			break;
162			}
163
164			case REMOVE_MULTICAST: {
165			const char data = (const char )p->data;
166			D(bug("remove multicast %02x %02x %02x %02x %02x %02x\n", data[0], data[1], data[2], data[3], data[4], data[5]));
167			if (active) {
168			status_t result;
169			if ((result = EtherCard->RemoveMulticastAddress(data)) != B_OK) {
170			// !! handle error !! error while removing multicast address
171			D(bug("error while removing multicast address %d\n", result));
172			}
173			}
174			break;
175			}
176
177			case SHEEP_PACKET: {
178			uint32 length = p->length;
179			// D(bug("sheep packet %d\n", length));
180			if (active) {
181			BStandardPacket *packet = new BStandardPacket(length);
182			packet->Write(0, (const char *)p->data, length);
183			EtherCard->SendPacket(packet);
184			}
185			break;
186			}
187
188			default:
189			D(bug("error: unknown port packet type\n"));
190			break;
191			}
192			p->cmd = 0; // Free packet
193			wr_pos = (wr_pos + 1) % WRITE_PACKET_COUNT;
194			p = &net_buffer_ptr->write[wr_pos];
195			}
196
197			// Wait for next packet
198			next: acquire_sem_etc(write_sem, 1, B_TIMEOUT, 25000);
199			}
200			return 0;
201			}
202
203
204			/*
205			* Init the net add-on
206			*/
207
208			static void init_addon()
209			{
210			int i;
211			D(bug("init sheep-net\n"));
212
213			// Create packet buffer
214	cebix	1.2	if ((buffer_area = create_area("packet buffer", (void **)&net_buffer_ptr, B_ANY_ADDRESS, buffer_size, B_FULL_LOCK, B_READ_AREA \| B_WRITE_AREA)) < B_NO_ERROR) {
215	cebix	1.1	D(bug("FATAL ERROR: can't create shared area\n"));
216			return;
217			}
218
219			// Init packet buffer
220			clear();
221			EtherCard->Address((char *)net_buffer_ptr->ether_addr);
222			net_buffer_ptr->read_sem = -1;
223			net_buffer_ptr->read_ofs = (uint32)(net_buffer_ptr->read) - (uint32)net_buffer_ptr;
224			net_buffer_ptr->read_packet_size = sizeof(net_packet);
225			net_buffer_ptr->read_packet_count = READ_PACKET_COUNT;
226			if ((write_sem = create_sem(0, "ether write")) < B_NO_ERROR) {
227			D(bug("FATAL ERROR: can't create semaphore\n"));
228			return;
229			}
230			net_buffer_ptr->write_sem = write_sem;
231			net_buffer_ptr->write_ofs = (uint32)(net_buffer_ptr->write) - (uint32)net_buffer_ptr;
232			net_buffer_ptr->write_packet_size = sizeof(net_packet);
233			net_buffer_ptr->write_packet_count = WRITE_PACKET_COUNT;
234
235			// Start packet writer thread
236			write_thread = spawn_thread(write_packet_func, "sheep_net ether write", B_URGENT_DISPLAY_PRIORITY, NULL);
237			resume_thread(write_thread);
238			}
239
240
241			/*
242			* Add-on attached to Ethernet card
243			*/
244
245			void SheepNetAddOn::AddDevice(BNetDevice dev, const char name)
246			{
247			if (dev->Type() != B_ETHER_NET_DEVICE)
248			return;
249			if (EtherCard != NULL) {
250			// !! handle error !! support for multiple ethernet cards ...
251			D(bug("error: SheepShaver doesn't support multiple Ethernetcards !\n"));
252			return;
253			}
254			EtherCard = dev;
255			init_addon();
256			register_packet_handler(this, dev, NETDUMP_PRIO);
257			}
258
259
260			/*
261			* Ethernet packet received
262			*/
263
264			bool SheepNetAddOn::PacketReceived(BNetPacket pkt, BNetDevice dev)
265			{
266			if (shutdown_now) {
267			unregister_packet_handler(this, dev);
268			return false;
269			}
270			// D(bug("read_packet_func %d\n", pkt->Size()));
271			if (active) {
272			D(bug("rp: %d\n", rd_pos));
273			net_packet *p = &net_buffer_ptr->read[rd_pos];
274			if (p->cmd & IN_USE) {
275			D(bug("error: full read buffer ... lost packet\n"));
276			} else {
277			memcpy(p->data, pkt->Data(), pkt->Size());
278			p->length = pkt->Size();
279			p->cmd = IN_USE \| (SHEEP_PACKET << 8);
280			rd_pos = (rd_pos + 1) % READ_PACKET_COUNT;
281			release_sem(net_buffer_ptr->read_sem);
282			}
283			}
284			//D(bug("%02x %02x %02x %02x %02x %02x", (uchar) (pkt->Data())[0],(uchar) (pkt->Data())[1],(uchar) (pkt->Data())[2],(uchar) (pkt->Data())[3],(uchar) (pkt->Data())[4],(uchar) (pkt->Data())[5]));
285			return false;
286			}
287
288			#pragma export on
289			extern "C" BNetProtocol open_protocol(const char device)
290			{
291			SheepNetAddOn *dev = new SheepNetAddOn;
292			return dev;
293			}
294			#pragma export off