Add vsockmon virtual network device that receives packets from the vsock transports and exposes them to user space. Based on the nlmon device.
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| @@ -477,6 +477,7 @@ header-y += virtio_types.h · 476 unmodified lines | ||
| 477 | 477 | header-y += virtio_vsock.h |
| 478 | 478 | header-y += virtio_crypto.h |
| 479 | 479 | header-y += vm_sockets.h |
| 480 | +header-y += vsockmon.h | |
| 480 | 481 | header-y += vt.h |
| 481 | 482 | header-y += vtpm_proxy.h |
| 482 | 483 | header-y += wait.h |
| @@ -0,0 +1,60 @@ | ||
| 1 | +#ifndef _UAPI_VSOCKMON_H | |
| 2 | +#define _UAPI_VSOCKMON_H | |
| 3 | + | |
| 4 | +#include <linux/virtio_vsock.h> | |
| 5 | + | |
| 6 | +/* | |
| 7 | + * vsockmon is the AF_VSOCK packet capture device. Packets captured have the | |
| 8 | + * following layout: | |
| 9 | + * | |
| 10 | + * +-----------------------------------+ | |
| 11 | + * | vsockmon header | | |
| 12 | + * | (struct af_vsockmon_hdr) | | |
| 13 | + * +-----------------------------------+ | |
| 14 | + * | transport header | | |
| 15 | + * | (af_vsockmon_hdr->len bytes long) | | |
| 16 | + * +-----------------------------------+ | |
| 17 | + * | payload | | |
| 18 | + * | (until end of packet) | | |
| 19 | + * +-----------------------------------+ | |
| 20 | + * | |
| 21 | + * The vsockmon header is a transport-independent description of the packet. | |
| 22 | + * It duplicates some of the information from the transport header so that | |
| 23 | + * no transport-specific knowledge is necessary to process packets. | |
| 24 | + * | |
| 25 | + * The transport header is useful for low-level transport-specific packet | |
| 26 | + * analysis. Transport type is given in af_vsockmon_hdr->transport and | |
| 27 | + * transport header length is given in af_vsockmon_hdr->len. | |
| 28 | + * | |
| 29 | + * If af_vsockmon_hdr->op is AF_VSOCK_OP_PAYLOAD then the payload follows the | |
| 30 | + * transport header. Other ops do not have a payload. | |
| 31 | + */ | |
| 32 | + | |
| 33 | +struct af_vsockmon_hdr { | |
| 34 | + __le64 src_cid; | |
| 35 | + __le64 dst_cid; | |
| 36 | + __le32 src_port; | |
| 37 | + __le32 dst_port; | |
| 38 | + __le16 op; /* enum af_vsockmon_op */ | |
| 39 | + __le16 transport; /* enum af_vsockmon_transport */ | |
| 40 | + __le16 len; /* Transport header length */ | |
| 41 | + __u8 reserved[2]; | |
| 42 | +}; | |
| 43 | + | |
| 44 | +enum af_vsockmon_op { | |
| 45 | + AF_VSOCK_OP_UNKNOWN = 0, | |
| 46 | + AF_VSOCK_OP_CONNECT = 1, | |
| 47 | + AF_VSOCK_OP_DISCONNECT = 2, | |
| 48 | + AF_VSOCK_OP_CONTROL = 3, | |
| 49 | + AF_VSOCK_OP_PAYLOAD = 4, | |
| 50 | +}; | |
| 51 | + | |
| 52 | +enum af_vsockmon_transport { | |
| 53 | + AF_VSOCK_TRANSPORT_UNKNOWN = 0, | |
| 54 | + AF_VSOCK_TRANSPORT_NO_INFO = 1, /* No transport information */ | |
| 55 | + | |
| 56 | + /* Transport header type: struct virtio_vsock_hdr */ | |
| 57 | + AF_VSOCK_TRANSPORT_VIRTIO = 2, | |
| 58 | +}; | |
| 59 | + | |
| 60 | +#endif | |