mirror of https://github.com/proxmox/mirror_qemu
qemu:virtio-net: Enable filtering based on MAC, promisc, broadcast and allmulti (Alex Williamson)
Make use of the new RX_MODE control virtqueue class by dropping packets the guest doesn't want to see. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6538 c046a42c-6fe2-441c-8c8c-71466251a162master
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002437cd42
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3831ab2094
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@ -222,6 +222,31 @@ static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt,
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return offset;
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return offset;
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}
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}
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static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
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{
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static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
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uint8_t *ptr = (uint8_t *)buf;
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if (n->promisc)
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return 1;
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#ifdef TAP_VNET_HDR
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if (tap_has_vnet_hdr(n->vc->vlan->first_client))
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ptr += sizeof(struct virtio_net_hdr);
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#endif
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if ((ptr[0] & 1) && n->allmulti)
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return 1;
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if (!memcmp(ptr, bcast, sizeof(bcast)))
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return 1;
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if (!memcmp(ptr, n->mac, ETH_ALEN))
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return 1;
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return 0;
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}
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static void virtio_net_receive(void *opaque, const uint8_t *buf, int size)
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static void virtio_net_receive(void *opaque, const uint8_t *buf, int size)
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{
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{
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VirtIONet *n = opaque;
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VirtIONet *n = opaque;
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@ -231,6 +256,9 @@ static void virtio_net_receive(void *opaque, const uint8_t *buf, int size)
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if (!do_virtio_net_can_receive(n, size))
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if (!do_virtio_net_can_receive(n, size))
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return;
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return;
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if (!receive_filter(n, buf, size))
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return;
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/* hdr_len refers to the header we supply to the guest */
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/* hdr_len refers to the header we supply to the guest */
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hdr_len = n->mergeable_rx_bufs ?
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hdr_len = n->mergeable_rx_bufs ?
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sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr);
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sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr);
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