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passt, tap: Add --fd option

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This passes a fully connected stream socket to passt.

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
[sbrivio: reuse fd_tap instead of adding a new descriptor,
 imply --one-off on --fd, add to optstring and usage()]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Richard W.M. Jones 2022-11-17 18:49:34 +00:00 • committed by Stefano Brivio
parent 15119dcf6c
commit 6b4e68383c
5 changed files with 46 additions and 4 deletions

2
passt.h
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@ -159,7 +159,7 @@ struct ip6_ctx {
* @proc_net_udp: Stored handles for /proc/net/udp{,6} in init and ns
* @epollfd: File descriptor for epoll instance
* @fd_tap_listen: File descriptor for listening AF_UNIX socket, if any
* @fd_tap: File descriptor for AF_UNIX socket or tuntap device
* @fd_tap: AF_UNIX socket, tuntap device, or pre-opened socket
* @mac: Host MAC address
* @mac_guest: MAC address of guest or namespace, seen or configured
* @ifi4: Index of routable interface for IPv4, 0 if IPv4 disabled