mirror of https://github.com/bochs-emu/Bochs
210 lines
6.4 KiB
C++
210 lines
6.4 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id: eth_arpback.cc,v 1.6 2001-10-03 13:10:38 bdenney Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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// eth_arpback.cc - basic ethernet packetmover, only responds to ARP
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// Various networking docs:
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// http://www.graphcomp.com/info/rfc/
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// rfc0826: arp
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// rfc0903: rarp
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#include "bochs.h"
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#ifdef ETH_ARPBACK
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#include "crc32.h"
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#include "eth_packetmaker.h"
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#define LOG_THIS bx_ne2k.
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//static const Bit8u external_mac[]={0xB0, 0xC4, 0x20, 0x20, 0x00, 0x00, 0x00};
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//static const Bit8u internal_mac[]={0xB0, 0xC4, 0x20, 0x00, 0x00, 0x00, 0x00};
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//static const Bit8u external_ip[]={ 192, 168, 0, 2, 0x00 };
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//static const Bit8u broadcast_mac[]={0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00};
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//static const Bit8u ethtype_arp[]={0x08, 0x06, 0x00};
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#define MAX_FRAME_SIZE 2048
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//
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// Define the class. This is private to this module
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//
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class bx_arpback_pktmover_c : public eth_pktmover_c {
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public:
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bx_arpback_pktmover_c(const char *netif, const char *macaddr,
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eth_rx_handler_t rxh,
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void *rxarg);
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void sendpkt(void *buf, unsigned io_len);
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private:
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int rx_timer_index;
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static void rx_timer_handler(void *);
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void rx_timer(void);
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FILE *txlog, *txlog_txt;
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//Bit8u arpbuf[MAX_FRAME_SIZE];
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//Bit32u buflen;
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//Boolean bufvalid;
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//CRC_Generator mycrc;
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eth_ETHmaker packetmaker;
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};
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//
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// Define the static class that registers the derived pktmover class,
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// and allocates one on request.
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//
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class bx_arpback_locator_c : public eth_locator_c {
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public:
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bx_arpback_locator_c(void) : eth_locator_c("arpback") {}
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protected:
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eth_pktmover_c *allocate(const char *netif, const char *macaddr,
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eth_rx_handler_t rxh,
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void *rxarg) {
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return (new bx_arpback_pktmover_c(netif, macaddr, rxh, rxarg));
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}
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} bx_arpback_match;
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//
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// Define the methods for the bx_arpback_pktmover derived class
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//
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// the constructor
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bx_arpback_pktmover_c::bx_arpback_pktmover_c(const char *netif,
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const char *macaddr,
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eth_rx_handler_t rxh,
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void *rxarg)
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{
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this->rx_timer_index =
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bx_pc_system.register_timer(this, this->rx_timer_handler, 1000,
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1, 1); // continuous, active
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this->rxh = rxh;
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this->rxarg = rxarg;
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//bufvalid=0;
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packetmaker.init();
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#if BX_ETH_NULL_LOGGING
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// Start the rx poll
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// eventually Bryce wants txlog to dump in pcap format so that
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// tcpdump -r FILE can read it and interpret packets.
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txlog = fopen ("ne2k-tx.log", "wb");
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if (!txlog) BX_PANIC (("open ne2k-tx.log failed"));
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txlog_txt = fopen ("ne2k-txdump.txt", "wb");
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if (!txlog_txt) BX_PANIC (("open ne2k-txdump.txt failed"));
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fprintf (txlog_txt, "arpback packetmover readable log file\n");
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fprintf (txlog_txt, "net IF = %s\n", netif);
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fprintf (txlog_txt, "MAC address = ");
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for (int i=0; i<6; i++)
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fprintf (txlog_txt, "%02x%s", 0xff & macaddr[i], i<5?":" : "");
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fprintf (txlog_txt, "\n--\n");
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fflush (txlog_txt);
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#endif
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}
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void
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bx_arpback_pktmover_c::sendpkt(void *buf, unsigned io_len)
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{
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if(io_len<MAX_FRAME_SIZE) {
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eth_packet barney;
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memcpy(barney.buf,buf,io_len);
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barney.len=io_len;
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if(packetmaker.ishandler(barney)) {
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packetmaker.sendpacket(barney);
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}
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/*
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if(( (!memcmp(buf, external_mac, 6)) || (!memcmp(buf, broadcast_mac, 6)) )
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&& (!memcmp(((Bit8u *)buf)+12, ethtype_arp, 2)) ) {
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Bit32u tempcrc;
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memcpy(arpbuf,buf,io_len); //move to temporary buffer
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memcpy(arpbuf, arpbuf+6, 6); //set destination to sender
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memcpy(arpbuf+6, external_mac, 6); //set sender to us
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memcpy(arpbuf+32, arpbuf+22, 10); //move destination to sender
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memcpy(arpbuf+22, external_mac, 6); //set sender to us
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memcpy(arpbuf+28, external_ip, 4); //set sender to us
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arpbuf[21]=2; //make this a reply and not a request
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tempcrc=mycrc.get_CRC(arpbuf,io_len);
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memcpy(arpbuf+io_len, &tempcrc, 4);
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buflen=io_len;//+4
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bufvalid=1;
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}
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*/
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}
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#if BX_ETH_NULL_LOGGING
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BX_DEBUG (("sendpkt length %u", io_len));
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// dump raw bytes to a file, eventually dump in pcap format so that
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// tcpdump -r FILE can interpret them for us.
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int n = fwrite (buf, io_len, 1, txlog);
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if (n != 1) BX_ERROR (("fwrite to txlog failed", io_len));
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// dump packet in hex into an ascii log file
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fprintf (txlog_txt, "NE2K transmitting a packet, length %u\n", io_len);
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Bit8u *charbuf = (Bit8u *)buf;
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for (n=0; n<io_len; n++) {
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if (((n % 16) == 0) && n>0)
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fprintf (txlog_txt, "\n");
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fprintf (txlog_txt, "%02x ", charbuf[n]);
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}
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fprintf (txlog_txt, "\n--\n");
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// flush log so that we see the packets as they arrive w/o buffering
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fflush (txlog);
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fflush (txlog_txt);
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#endif
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}
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void bx_arpback_pktmover_c::rx_timer_handler (void * this_ptr)
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{
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#if BX_ETH_NULL_LOGGING
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BX_DEBUG (("rx_timer_handler"));
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#endif
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bx_arpback_pktmover_c *class_ptr = ((bx_arpback_pktmover_c *)this_ptr);
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class_ptr->rx_timer();
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}
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void bx_arpback_pktmover_c::rx_timer (void)
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{
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int nbytes = 0;
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struct bpf_hdr *bhdr;
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eth_packet rubble;
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if(packetmaker.getpacket(rubble)) {
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//bufvalid=0;
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void * buf=rubble.buf;
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unsigned io_len=rubble.len;
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Bit32u n;
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fprintf (txlog_txt, "NE2K receiving a packet, length %u\n", io_len);
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Bit8u *charbuf = (Bit8u *)buf;
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for (n=0; n<io_len; n++) {
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if (((n % 16) == 0) && n>0)
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fprintf (txlog_txt, "\n");
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fprintf (txlog_txt, "%02x ", charbuf[n]);
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}
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fprintf (txlog_txt, "\n--\n");
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fflush (txlog_txt);
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(*rxh)(rxarg, buf, io_len);
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}
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}
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#endif
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