177 lines
3.9 KiB
C
177 lines
3.9 KiB
C
/*
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* QEMU VMWARE VMXNET* paravirtual NICs - RX packets abstraction
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*
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* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
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*
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* Developed by Daynix Computing LTD (http://www.daynix.com)
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*
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* Authors:
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* Dmitry Fleytman <dmitry@daynix.com>
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* Tamir Shomer <tamirs@daynix.com>
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* Yan Vugenfirer <yan@daynix.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef VMXNET_RX_PKT_H
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#define VMXNET_RX_PKT_H
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#include "stdint.h"
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#include "stdbool.h"
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#include "net/eth.h"
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/* defines to enable packet dump functions */
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/*#define VMXNET_RX_PKT_DEBUG*/
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struct VmxnetRxPkt;
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/**
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* Clean all rx packet resources
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*
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* @pkt: packet
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*
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*/
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void vmxnet_rx_pkt_uninit(struct VmxnetRxPkt *pkt);
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/**
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* Init function for rx packet functionality
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*
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* @pkt: packet pointer
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* @has_virt_hdr: device uses virtio header
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*
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*/
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void vmxnet_rx_pkt_init(struct VmxnetRxPkt **pkt, bool has_virt_hdr);
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/**
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* returns total length of data attached to rx context
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*
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* @pkt: packet
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*
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* Return: nothing
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*
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*/
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size_t vmxnet_rx_pkt_get_total_len(struct VmxnetRxPkt *pkt);
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/**
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* parse and set packet analysis results
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*
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* @pkt: packet
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* @data: pointer to the data buffer to be parsed
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* @len: data length
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*
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*/
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void vmxnet_rx_pkt_set_protocols(struct VmxnetRxPkt *pkt, const void *data,
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size_t len);
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/**
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* fetches packet analysis results
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*
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* @pkt: packet
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* @isip4: whether the packet given is IPv4
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* @isip6: whether the packet given is IPv6
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* @isudp: whether the packet given is UDP
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* @istcp: whether the packet given is TCP
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*
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*/
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void vmxnet_rx_pkt_get_protocols(struct VmxnetRxPkt *pkt,
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bool *isip4, bool *isip6,
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bool *isudp, bool *istcp);
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/**
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* returns virtio header stored in rx context
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*
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* @pkt: packet
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* @ret: virtio header
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*
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*/
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struct virtio_net_hdr *vmxnet_rx_pkt_get_vhdr(struct VmxnetRxPkt *pkt);
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/**
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* returns packet type
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*
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* @pkt: packet
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* @ret: packet type
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*
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*/
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eth_pkt_types_e vmxnet_rx_pkt_get_packet_type(struct VmxnetRxPkt *pkt);
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/**
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* returns vlan tag
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*
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* @pkt: packet
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* @ret: VLAN tag
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*
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*/
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uint16_t vmxnet_rx_pkt_get_vlan_tag(struct VmxnetRxPkt *pkt);
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/**
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* tells whether vlan was stripped from the packet
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*
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* @pkt: packet
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* @ret: VLAN stripped sign
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*
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*/
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bool vmxnet_rx_pkt_is_vlan_stripped(struct VmxnetRxPkt *pkt);
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/**
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* notifies caller if the packet has virtio header
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*
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* @pkt: packet
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* @ret: true if packet has virtio header, false otherwize
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*
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*/
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bool vmxnet_rx_pkt_has_virt_hdr(struct VmxnetRxPkt *pkt);
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/**
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* attach data to rx packet
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*
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* @pkt: packet
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* @data: pointer to the data buffer
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* @len: data length
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* @strip_vlan: should the module strip vlan from data
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*
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*/
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void vmxnet_rx_pkt_attach_data(struct VmxnetRxPkt *pkt, const void *data,
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size_t len, bool strip_vlan);
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/**
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* returns io vector that holds the attached data
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*
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* @pkt: packet
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* @ret: pointer to IOVec
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*
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*/
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struct iovec *vmxnet_rx_pkt_get_iovec(struct VmxnetRxPkt *pkt);
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/**
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* prints rx packet data if debug is enabled
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*
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* @pkt: packet
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*
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*/
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void vmxnet_rx_pkt_dump(struct VmxnetRxPkt *pkt);
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/**
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* copy passed vhdr data to packet context
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*
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* @pkt: packet
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* @vhdr: VHDR buffer
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*
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*/
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void vmxnet_rx_pkt_set_vhdr(struct VmxnetRxPkt *pkt,
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struct virtio_net_hdr *vhdr);
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/**
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* save packet type in packet context
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*
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* @pkt: packet
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* @packet_type: the packet type
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*
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*/
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void vmxnet_rx_pkt_set_packet_type(struct VmxnetRxPkt *pkt,
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eth_pkt_types_e packet_type);
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#endif
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