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networking: add Linux-specific TAP mode to network interface

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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.
This commit is contained in:
Doug Johnson
2023-08-06 20:11:36 -06:00
parent 80f5c47221
commit 45bcbc75fd
8 changed files with 463 additions and 18 deletions
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5
src/include/86box/network.h
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@@ -52,6 +52,7 @@
#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 */
@@ -125,6 +126,7 @@ typedef struct 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 {
@@ -154,10 +156,11 @@ 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)
#define HAS_NOSLIRP_NET(x) (x.has_pcap || x.has_vde || x.has_tap)
#ifdef __cplusplus
extern "C" {