d22cdbdbf7
- Added DNS service support for the server "vnet" and connected clients. - Added command line option "-loglev=" to control whether or not there is BX_ERROR, BX_INFO or BX_DEBUG output. Default value is 1 (BX_ERROR only).
151 lines
4.0 KiB
C
151 lines
4.0 KiB
C
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2004-2017 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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// netutil.h - shared code for eth_vnet.cc and bxhub.cc
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#ifndef BX_NETUTIL_H
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#define BX_NETUTIL_H
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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 ARP_OPCODE_REQUEST 1
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#define ARP_OPCODE_REPLY 2
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#define ARP_OPCODE_REV_REQUEST 3
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#define ARP_OPCODE_REV_REPLY 4
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#define ICMP_ECHO_PACKET_MAX 128
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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 arp_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 hw_addr_space;
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Bit16u proto_addr_space;
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Bit8u hw_addr_len;
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Bit8u proto_addr_len;
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Bit16u opcode;
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/* HW address of sender */
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/* Protocol address of sender */
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/* HW address of target*/
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/* Protocol address of target */
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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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arp_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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// DHCP configuration structure
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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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Bit8u default_guest_ipv4addr[4];
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Bit8u guest_ipv4addr[4];
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Bit8u dns_ipv4addr[4];
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char *hostname;
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} dhcp_cfg_t;
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// vnet functions shared with bxhub
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#ifdef BXHUB
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#define bx_devmodel_c void
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#endif
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Bit16u ip_checksum(const Bit8u *buf, unsigned buf_len);
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void vnet_prepare_reply(Bit8u *replybuf, unsigned l3type, dhcp_cfg_t *dhcpc);
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bx_bool vnet_process_arp_request(const Bit8u *buf, Bit8u *reply, dhcp_cfg_t *dhcp);
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bx_bool vnet_process_icmp_echo(const Bit8u *l3pkt, unsigned l3header_len,
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const Bit8u *l4pkt, unsigned l4pkt_len,
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Bit8u *reply);
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int vnet_process_dhcp(bx_devmodel_c *netdev, const Bit8u *data, unsigned data_len,
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Bit8u *reply, dhcp_cfg_t *dhcp);
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int vnet_process_tftp(bx_devmodel_c *netdev, const Bit8u *data, unsigned data_len,
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Bit16u req_tid, Bit8u *reply, const char *tftp_rootdir);
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#endif
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