218 lines
6.2 KiB
C++
218 lines
6.2 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001-2013 The Bochs Project
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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//
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// Peter Grehan (grehan@iprg.nokia.com) coded the initial version of the
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// NE2000/ether stuff.
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// netmod.h - see eth_null.cc for implementation details
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#ifndef BX_NETMOD_H
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#define BX_NETMOD_H
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// Pseudo device that loads the lowlevel networking module
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class bx_netmod_ctl_c : public bx_netmod_ctl_stub_c {
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public:
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bx_netmod_ctl_c();
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virtual ~bx_netmod_ctl_c() {}
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virtual void* init_module(bx_list_c *base, void* rxh, void* rxstat, bx_devmodel_c *dev);
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};
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#define BX_PACKET_BUFSIZE 2048 // Enough for an ether frame
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// device receive status definitions
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#define BX_NETDEV_RXREADY 0x0001
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#define BX_NETDEV_SPEED 0x000e
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#define BX_NETDEV_10MBIT 0x0002
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#define BX_NETDEV_100MBIT 0x0004
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#define BX_NETDEV_1GBIT 0x0008
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// this should not be smaller than an arp reply with an ethernet header
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#define MIN_RX_PACKET_LEN 60
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#define ETHERNET_MAC_ADDR_LEN 6
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#define ETHERNET_TYPE_IPV4 0x0800
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#define ETHERNET_TYPE_ARP 0x0806
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#define TFTP_BUFFER_SIZE 1024
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#if defined(_MSC_VER)
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#pragma pack(push, 1)
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#elif defined(__MWERKS__) && defined(macintosh)
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#pragma options align=packed
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#endif
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typedef struct ethernet_header {
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#if defined(_MSC_VER) && (_MSC_VER>=1300)
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__declspec(align(1))
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#endif
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Bit8u dst_mac_addr[ETHERNET_MAC_ADDR_LEN];
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Bit8u src_mac_addr[ETHERNET_MAC_ADDR_LEN];
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Bit16u type;
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}
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#if !defined(_MSC_VER)
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GCC_ATTRIBUTE((packed))
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#endif
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ethernet_header_t;
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typedef struct ip_header {
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#if defined(_MSC_VER) && (_MSC_VER>=1300)
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__declspec(align(1))
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#endif
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#ifdef BX_LITTLE_ENDIAN
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Bit8u header_len : 4;
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Bit8u version : 4;
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#else
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Bit8u version : 4;
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Bit8u header_len : 4;
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#endif
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Bit8u tos;
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Bit16u total_len;
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Bit16u id;
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Bit16u frag_offs;
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Bit8u ttl;
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Bit8u protocol;
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Bit16u checksum;
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Bit32u src_addr;
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Bit32u dst_addr;
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}
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#if !defined(_MSC_VER)
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GCC_ATTRIBUTE((packed))
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#endif
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ip_header_t;
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typedef struct udp_header {
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#if defined(_MSC_VER) && (_MSC_VER>=1300)
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__declspec(align(1))
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#endif
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Bit16u src_port;
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Bit16u dst_port;
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Bit16u length;
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Bit16u checksum;
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}
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#if !defined(_MSC_VER)
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GCC_ATTRIBUTE((packed))
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#endif
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udp_header_t;
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#if defined(_MSC_VER)
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#pragma pack(pop)
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#elif defined(__MWERKS__) && defined(macintosh)
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#pragma options align=reset
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#endif
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typedef void (*eth_rx_handler_t)(void *arg, const void *buf, unsigned len);
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typedef Bit32u (*eth_rx_status_t)(void *arg);
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typedef struct {
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Bit8u host_macaddr[6];
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Bit8u guest_macaddr[6];
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Bit8u host_ipv4addr[4];
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const Bit8u *default_guest_ipv4addr;
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Bit8u guest_ipv4addr[4];
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Bit8u dns_ipv4addr[4];
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} dhcp_cfg_t;
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static const Bit8u broadcast_macaddr[6] = {0xff,0xff,0xff,0xff,0xff,0xff};
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int execute_script(bx_devmodel_c *netdev, const char *name, char* arg1);
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void write_pktlog_txt(FILE *pktlog_txt, const Bit8u *buf, unsigned len, bx_bool host_to_guest);
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BX_CPP_INLINE Bit16u get_net2(const Bit8u *buf)
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{
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return (((Bit16u)*buf) << 8) |
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((Bit16u)*(buf+1));
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}
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BX_CPP_INLINE void put_net2(Bit8u *buf,Bit16u data)
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{
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*buf = (Bit8u)(data >> 8);
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*(buf+1) = (Bit8u)(data & 0xff);
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}
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BX_CPP_INLINE Bit32u get_net4(const Bit8u *buf)
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{
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return (((Bit32u)*buf) << 24) |
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(((Bit32u)*(buf+1)) << 16) |
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(((Bit32u)*(buf+2)) << 8) |
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((Bit32u)*(buf+3));
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}
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BX_CPP_INLINE void put_net4(Bit8u *buf,Bit32u data)
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{
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*buf = (Bit8u)((data >> 24) & 0xff);
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*(buf+1) = (Bit8u)((data >> 16) & 0xff);
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*(buf+2) = (Bit8u)((data >> 8) & 0xff);
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*(buf+3) = (Bit8u)(data & 0xff);
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}
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Bit16u ip_checksum(const Bit8u *buf, unsigned buf_len);
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int process_dhcp(bx_devmodel_c *netdev, const Bit8u *data, unsigned data_len, Bit8u *reply, dhcp_cfg_t *dhcp);
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int process_tftp(bx_devmodel_c *netdev, const Bit8u *data, unsigned data_len, Bit16u req_tid, Bit8u *reply, const char *tftp_rootdir);
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//
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// The eth_pktmover class is used by ethernet chip emulations
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// to interface to the outside world. An instance of this
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// would allow frames to be sent to and received from some
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// entity. An example would be the packet filter on a Unix
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// system, an NDIS driver in promisc mode on WinNT, or maybe
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// a simulated network that talks to another process.
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//
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class eth_pktmover_c {
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public:
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virtual void sendpkt(void *buf, unsigned io_len) = 0;
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virtual ~eth_pktmover_c () {}
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protected:
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bx_devmodel_c *netdev;
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eth_rx_handler_t rxh; // receive callback
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eth_rx_status_t rxstat; // receive status callback
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};
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//
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// The eth_locator class is used by pktmover classes to register
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// their name. Chip emulations use the static 'create' method
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// to locate and instantiate a pktmover class.
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//
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class eth_locator_c {
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public:
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static eth_pktmover_c *create(const char *type, const char *netif,
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const char *macaddr,
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eth_rx_handler_t rxh,
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eth_rx_status_t rxstat,
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bx_devmodel_c *dev,
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const char *script);
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protected:
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eth_locator_c(const char *type);
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virtual ~eth_locator_c() {}
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virtual eth_pktmover_c *allocate(const char *netif,
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const char *macaddr,
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eth_rx_handler_t rxh,
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eth_rx_status_t rxstat,
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bx_devmodel_c *dev,
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const char *script) = 0;
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private:
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static eth_locator_c *all;
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eth_locator_c *next;
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const char *type;
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};
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#endif
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