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45bcbc75fd2ae1eec31154edf4bebaff5d726823
86Box/src/include/86box/network.h
Doug Johnson 45bcbc75fd networking: add Linux-specific TAP mode to network interface 
This addition was motivated by my lack of knowledge of VDE and my
familiarity with the Linux networking stack. The driver automatically
manages the creation of TAP devices and their association with bridges,
such that configurations which specify the same bridge will be connected
together. It also automatically handles the creation of bridge devices for
convenience's sake.
2024-12-23 17:46:31 -07:00

264 lines
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/*
* VARCem Virtual ARchaeological Computer EMulator.
* An emulator of (mostly) x86-based PC systems and devices,
* using the ISA,EISA,VLB,MCA and PCI system buses, roughly
* spanning the era between 1981 and 1995.
*
* Definitions for the network module.
*
*
*
* Authors: Fred N. van Kempen, <decwiz@yahoo.com>
*
* Copyright 2017-2019 Fred N. van Kempen.
*
* Redistribution and use in source and binary forms, with
* or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain the entire
* above notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names
* of its contributors may be used to endorse or promote
* products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EMU_NETWORK_H
#define EMU_NETWORK_H
#include <stdint.h>
/* Network provider types. */
#define NET_TYPE_NONE 0 /* use the null network driver */
#define NET_TYPE_SLIRP 1 /* use the SLiRP port forwarder */
#define NET_TYPE_PCAP 2 /* use the (Win)Pcap API */
#define NET_TYPE_VDE 3 /* use the VDE plug API */
#define NET_TYPE_TAP 4 /* use a linux TAP device */
#define NET_MAX_FRAME 1518
/* Queue size must be a power of 2 */
#define NET_QUEUE_LEN 16
#define NET_QUEUE_LEN_MASK (NET_QUEUE_LEN - 1)
#define NET_QUEUE_COUNT 3
#define NET_CARD_MAX 4
#define NET_HOST_INTF_MAX 64
#define NET_PERIOD_10M 0.8
#define NET_PERIOD_100M 0.08
/* Error buffers for network driver init */
#define NET_DRV_ERRBUF_SIZE 384
enum {
NET_LINK_DOWN = (1 << 1),
NET_LINK_TEMP_DOWN = (1 << 2),
NET_LINK_10_HD = (1 << 3),
NET_LINK_10_FD = (1 << 4),
NET_LINK_100_HD = (1 << 5),
NET_LINK_100_FD = (1 << 6),
NET_LINK_1000_HD = (1 << 7),
NET_LINK_1000_FD = (1 << 8),
};
enum {
NET_NONE = 0,
NET_INTERNAL
};
enum {
NET_QUEUE_RX = 0,
NET_QUEUE_TX_VM = 1,
NET_QUEUE_TX_HOST = 2
};
typedef struct netcard_conf_t {
uint16_t device_num;
int net_type;
char host_dev_name[128];
uint32_t link_state;
} netcard_conf_t;
extern netcard_conf_t net_cards_conf[NET_CARD_MAX];
extern uint16_t net_card_current;
typedef int (*NETRXCB)(void *, uint8_t *, int);
typedef int (*NETSETLINKSTATE)(void *, uint32_t link_state);
typedef struct netpkt {
uint8_t *data;
int len;
} netpkt_t;
typedef struct netqueue_t {
netpkt_t packets[NET_QUEUE_LEN];
int head;
int tail;
} netqueue_t;
typedef struct _netcard_t netcard_t;
typedef struct netdrv_t {
void (*notify_in)(void *priv);
void *(*init)(const netcard_t *card, const uint8_t *mac_addr, void *priv, char *netdrv_errbuf);
void (*close)(void *priv);
void *priv;
} netdrv_t;
extern const netdrv_t net_pcap_drv;
extern const netdrv_t net_slirp_drv;
extern const netdrv_t net_vde_drv;
extern const netdrv_t net_tap_drv;
extern const netdrv_t net_null_drv;
struct _netcard_t {
const device_t *device;
void *card_drv;
struct netdrv_t host_drv;
NETRXCB rx;
NETSETLINKSTATE set_link_state;
netqueue_t queues[NET_QUEUE_COUNT];
netpkt_t queued_pkt;
mutex_t *tx_mutex;
mutex_t *rx_mutex;
pc_timer_t timer;
uint16_t card_num;
double byte_period;
uint32_t led_timer;
uint32_t led_state;
uint32_t link_state;
};
typedef struct {
char device[128];
char description[128];
} netdev_t;
typedef struct {
int has_slirp;
int has_pcap;
int has_vde;
int has_tap;
} network_devmap_t;
#define HAS_NOSLIRP_NET(x) (x.has_pcap || x.has_vde || x.has_tap)
#ifdef __cplusplus
extern "C" {
#endif
/* Global variables. */
extern int nic_do_log; // config
extern network_devmap_t network_devmap;
extern int network_ndev; // Number of pcap devices
extern network_devmap_t network_devmap; // Bitmap of available network types
extern netdev_t network_devs[NET_HOST_INTF_MAX];
/* Function prototypes. */
extern void network_init(void);
extern netcard_t *network_attach(void *card_drv, uint8_t *mac, NETRXCB rx, NETSETLINKSTATE set_link_state);
extern void netcard_close(netcard_t *card);
extern void network_close(void);
extern void network_reset(void);
extern int network_available(void);
extern void network_tx(netcard_t *card, uint8_t *, int);
extern int net_pcap_prepare(netdev_t *);
extern int net_vde_prepare(void);
extern void network_connect(int id, int connect);
extern int network_is_connected(int id);
extern int network_dev_available(int);
extern int network_dev_to_id(char *);
extern int network_card_available(int);
extern int network_card_has_config(int);
extern const char *network_card_get_internal_name(int);
extern int network_card_get_from_internal_name(char *);
#ifdef EMU_DEVICE_H
extern const device_t *network_card_getdevice(int);
#endif
extern int network_tx_pop(netcard_t *card, netpkt_t *out_pkt);
extern int network_tx_popv(netcard_t *card, netpkt_t *pkt_vec, int vec_size);
extern int network_rx_put(netcard_t *card, uint8_t *bufp, int len);
extern int network_rx_put_pkt(netcard_t *card, netpkt_t *pkt);
#ifdef EMU_DEVICE_H
/* 3Com Etherlink */
extern const device_t threec501_device;
extern const device_t threec503_device;
/* Novell NE2000 and compatibles */
extern const device_t ne1000_device;
extern const device_t ne1000_compat_device;
extern const device_t ne2000_device;
extern const device_t ne2000_compat_device;
extern const device_t ne2000_compat_8bit_device;
extern const device_t ethernext_mc_device;
extern const device_t rtl8019as_device;
extern const device_t de220p_device;
extern const device_t rtl8029as_device;
/* AMD PCnet*/
extern const device_t pcnet_am79c960_device;
extern const device_t pcnet_am79c960_eb_device;
extern const device_t pcnet_am79c960_vlb_device;
extern const device_t pcnet_am79c961_device;
extern const device_t pcnet_am79c970a_device;
extern const device_t pcnet_am79c973_device;
extern const device_t pcnet_am79c973_onboard_device;
/* Modem */
extern const device_t modem_device;
/* PLIP */
#ifdef EMU_LPT_H
extern const lpt_device_t lpt_plip_device;
#endif
extern const device_t plip_device;
/* Realtek RTL8139C+ */
extern const device_t rtl8139c_plus_device;
/* DEC Tulip */
extern const device_t dec_tulip_device;
extern const device_t dec_tulip_21140_device;
extern const device_t dec_tulip_21140_vpc_device;
extern const device_t dec_tulip_21040_device;
/* WD 80x3 */
extern const device_t wd8003e_device;
extern const device_t wd8003eb_device;
extern const device_t wd8013ebt_device;
extern const device_t wd8003eta_device;
extern const device_t wd8003ea_device;
extern const device_t wd8013epa_device;
#endif
#ifdef __cplusplus
}
#endif
#endif /*EMU_NETWORK_H*/
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