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Initial support for vmnet.framework

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On macOS, tap devices for L2 networking are not supported out of the
box. While a kext can be added to provide tap support, the kext
experience is not very good; Apple has strongly recommended against
their usage.

As a replacement that's documented and recommended, Apple introduced the
vmnet framework, intended for emulators and virtualization software
explicitly. This API requires macOS 10.10, with bridged network support
coming in macOS 10.15.

This introduces basic support for vmnet.framework in SIMH. I've tested
it by booting an emulated MicroVAX 3800 from an emulated InfoServer 150,
where it was able to reach OpenVMS 7.3 standalone BACKUP.
This commit is contained in:
Calvin Buckley
2025-01-25 22:35:25 -04:00
committed by Paul Koning
parent ad3e744951
commit 361ef76dbc
4 changed files with 167 additions and 0 deletions
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sim_ether.h
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@@ -265,6 +265,7 @@ struct eth_device {
#define ETH_API_VDE 3 /* VDE API in use */
#define ETH_API_UDP 4 /* UDP API in use */
#define ETH_API_NAT 5 /* NAT (SLiRP) API in use */
#define ETH_API_VMN 6 /* Apple vmnet.framework in use */
ETH_PCALLBACK read_callback; /* read callback function */
ETH_PCALLBACK write_callback; /* write callback function */
ETH_PACK* read_packet; /* read packet */