diff options
Diffstat (limited to 'tools/ioemu/iodev/eth_arpback.cc')
| -rw-r--r-- | tools/ioemu/iodev/eth_arpback.cc | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/tools/ioemu/iodev/eth_arpback.cc b/tools/ioemu/iodev/eth_arpback.cc new file mode 100644 index 0000000000..0f30711dfb --- /dev/null +++ b/tools/ioemu/iodev/eth_arpback.cc @@ -0,0 +1,214 @@ +///////////////////////////////////////////////////////////////////////// +// $Id: eth_arpback.cc,v 1.11 2002/11/20 19:06:22 bdenney Exp $ +///////////////////////////////////////////////////////////////////////// +// +// Copyright (C) 2001 MandrakeSoft S.A. +// +// MandrakeSoft S.A. +// 43, rue d'Aboukir +// 75002 Paris - France +// http://www.linux-mandrake.com/ +// http://www.mandrakesoft.com/ +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library 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 +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +// eth_arpback.cc - basic ethernet packetmover, only responds to ARP + +// Various networking docs: +// http://www.graphcomp.com/info/rfc/ +// rfc0826: arp +// rfc0903: rarp + +// Define BX_PLUGGABLE in files that can be compiled into plugins. For +// platforms that require a special tag on exported symbols, BX_PLUGGABLE +// is used to know when we are exporting symbols and when we are importing. +#define BX_PLUGGABLE + +#include "bochs.h" + +#if BX_NE2K_SUPPORT && defined(ETH_ARPBACK) + +#include "crc32.h" +#include "eth_packetmaker.h" +#define LOG_THIS bx_devices.pluginNE2kDevice-> + + +//static const Bit8u external_mac[]={0xB0, 0xC4, 0x20, 0x20, 0x00, 0x00, 0x00}; +//static const Bit8u internal_mac[]={0xB0, 0xC4, 0x20, 0x00, 0x00, 0x00, 0x00}; +//static const Bit8u external_ip[]={ 192, 168, 0, 2, 0x00 }; +//static const Bit8u broadcast_mac[]={0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00}; +//static const Bit8u ethtype_arp[]={0x08, 0x06, 0x00}; + +#define MAX_FRAME_SIZE 2048 + +// +// Define the class. This is private to this module +// +class bx_arpback_pktmover_c : public eth_pktmover_c { +public: + bx_arpback_pktmover_c(const char *netif, const char *macaddr, + eth_rx_handler_t rxh, + void *rxarg); + void sendpkt(void *buf, unsigned io_len); +private: + int rx_timer_index; + static void rx_timer_handler(void *); + void rx_timer(void); + FILE *txlog, *txlog_txt; + //Bit8u arpbuf[MAX_FRAME_SIZE]; + //Bit32u buflen; + //bx_bool bufvalid; + //CRC_Generator mycrc; + eth_ETHmaker packetmaker; +}; + + +// +// Define the static class that registers the derived pktmover class, +// and allocates one on request. +// +class bx_arpback_locator_c : public eth_locator_c { +public: + bx_arpback_locator_c(void) : eth_locator_c("arpback") {} +protected: + eth_pktmover_c *allocate(const char *netif, const char *macaddr, + eth_rx_handler_t rxh, + void *rxarg) { + return (new bx_arpback_pktmover_c(netif, macaddr, rxh, rxarg)); + } +} bx_arpback_match; + + +// +// Define the methods for the bx_arpback_pktmover derived class +// + +// the constructor +bx_arpback_pktmover_c::bx_arpback_pktmover_c(const char *netif, + const char *macaddr, + eth_rx_handler_t rxh, + void *rxarg) +{ + this->rx_timer_index = + bx_pc_system.register_timer(this, this->rx_timer_handler, 1000, + 1, 1, "eth_arpback"); // continuous, active + this->rxh = rxh; + this->rxarg = rxarg; + //bufvalid=0; + packetmaker.init(); +#if BX_ETH_NULL_LOGGING + // Start the rx poll + // eventually Bryce wants txlog to dump in pcap format so that + // tcpdump -r FILE can read it and interpret packets. + txlog = fopen ("ne2k-tx.log", "wb"); + if (!txlog) BX_PANIC (("open ne2k-tx.log failed")); + txlog_txt = fopen ("ne2k-txdump.txt", "wb"); + if (!txlog_txt) BX_PANIC (("open ne2k-txdump.txt failed")); + fprintf (txlog_txt, "arpback packetmover readable log file\n"); + fprintf (txlog_txt, "net IF = %s\n", netif); + fprintf (txlog_txt, "MAC address = "); + for (int i=0; i<6; i++) + fprintf (txlog_txt, "%02x%s", 0xff & macaddr[i], i<5?":" : ""); + fprintf (txlog_txt, "\n--\n"); + fflush (txlog_txt); +#endif +} + +void +bx_arpback_pktmover_c::sendpkt(void *buf, unsigned io_len) +{ + if(io_len<MAX_FRAME_SIZE) { + eth_packet barney; + memcpy(barney.buf,buf,io_len); + barney.len=io_len; + if(packetmaker.ishandler(barney)) { + packetmaker.sendpacket(barney); + } + /* + if(( (!memcmp(buf, external_mac, 6)) || (!memcmp(buf, broadcast_mac, 6)) ) + && (!memcmp(((Bit8u *)buf)+12, ethtype_arp, 2)) ) { + Bit32u tempcrc; + memcpy(arpbuf,buf,io_len); //move to temporary buffer + memcpy(arpbuf, arpbuf+6, 6); //set destination to sender + memcpy(arpbuf+6, external_mac, 6); //set sender to us + memcpy(arpbuf+32, arpbuf+22, 10); //move destination to sender + memcpy(arpbuf+22, external_mac, 6); //set sender to us + memcpy(arpbuf+28, external_ip, 4); //set sender to us + arpbuf[21]=2; //make this a reply and not a request + tempcrc=mycrc.get_CRC(arpbuf,io_len); + memcpy(arpbuf+io_len, &tempcrc, 4); + buflen=io_len;//+4 + bufvalid=1; + } + */ + } +#if BX_ETH_NULL_LOGGING + BX_DEBUG (("sendpkt length %u", io_len)); + // dump raw bytes to a file, eventually dump in pcap format so that + // tcpdump -r FILE can interpret them for us. + int n = fwrite (buf, io_len, 1, txlog); + if (n != 1) BX_ERROR (("fwrite to txlog failed", io_len)); + // dump packet in hex into an ascii log file + fprintf (txlog_txt, "NE2K transmitting a packet, length %u\n", io_len); + Bit8u *charbuf = (Bit8u *)buf; + for (n=0; n<io_len; n++) { + if (((n % 16) == 0) && n>0) + fprintf (txlog_txt, "\n"); + fprintf (txlog_txt, "%02x ", charbuf[n]); + } + fprintf (txlog_txt, "\n--\n"); + // flush log so that we see the packets as they arrive w/o buffering + fflush (txlog); + fflush (txlog_txt); +#endif +} + +void bx_arpback_pktmover_c::rx_timer_handler (void * this_ptr) +{ +#if BX_ETH_NULL_LOGGING + BX_DEBUG (("rx_timer_handler")); +#endif + bx_arpback_pktmover_c *class_ptr = ((bx_arpback_pktmover_c *)this_ptr); + + class_ptr->rx_timer(); +} + +void bx_arpback_pktmover_c::rx_timer (void) +{ + int nbytes = 0; + struct bpf_hdr *bhdr; + eth_packet rubble; + + if(packetmaker.getpacket(rubble)) { + //bufvalid=0; + void * buf=rubble.buf; + unsigned io_len=rubble.len; + Bit32u n; + fprintf (txlog_txt, "NE2K receiving a packet, length %u\n", io_len); + Bit8u *charbuf = (Bit8u *)buf; + for (n=0; n<io_len; n++) { + if (((n % 16) == 0) && n>0) + fprintf (txlog_txt, "\n"); + fprintf (txlog_txt, "%02x ", charbuf[n]); + } + fprintf (txlog_txt, "\n--\n"); + fflush (txlog_txt); + + (*rxh)(rxarg, buf, io_len); + } +} + +#endif /* if BX_NE2K_SUPPORT && defined(ETH_ARPBACK) */ + |