368 lines
8.2 KiB
C
368 lines
8.2 KiB
C
/*
|
|
* QEMU RX packets abstraction
|
|
*
|
|
* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
|
|
*
|
|
* Developed by Daynix Computing LTD (http://www.daynix.com)
|
|
*
|
|
* Authors:
|
|
* Dmitry Fleytman <dmitry@daynix.com>
|
|
* Tamir Shomer <tamirs@daynix.com>
|
|
* Yan Vugenfirer <yan@daynix.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef NET_RX_PKT_H
|
|
#define NET_RX_PKT_H
|
|
|
|
#include "net/eth.h"
|
|
|
|
/* defines to enable packet dump functions */
|
|
/*#define NET_RX_PKT_DEBUG*/
|
|
|
|
struct NetRxPkt;
|
|
|
|
/**
|
|
* Clean all rx packet resources
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
void net_rx_pkt_uninit(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* Init function for rx packet functionality
|
|
*
|
|
* @pkt: packet pointer
|
|
* @has_virt_hdr: device uses virtio header
|
|
*
|
|
*/
|
|
void net_rx_pkt_init(struct NetRxPkt **pkt, bool has_virt_hdr);
|
|
|
|
/**
|
|
* returns total length of data attached to rx context
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
* Return: nothing
|
|
*
|
|
*/
|
|
size_t net_rx_pkt_get_total_len(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* parse and set packet analysis results
|
|
*
|
|
* @pkt: packet
|
|
* @data: pointer to the data buffer to be parsed
|
|
* @len: data length
|
|
*
|
|
*/
|
|
void net_rx_pkt_set_protocols(struct NetRxPkt *pkt, const void *data,
|
|
size_t len);
|
|
|
|
/**
|
|
* fetches packet analysis results
|
|
*
|
|
* @pkt: packet
|
|
* @isip4: whether the packet given is IPv4
|
|
* @isip6: whether the packet given is IPv6
|
|
* @isudp: whether the packet given is UDP
|
|
* @istcp: whether the packet given is TCP
|
|
*
|
|
*/
|
|
void net_rx_pkt_get_protocols(struct NetRxPkt *pkt,
|
|
bool *isip4, bool *isip6,
|
|
bool *isudp, bool *istcp);
|
|
|
|
/**
|
|
* fetches L3 header offset
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
size_t net_rx_pkt_get_l3_hdr_offset(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* fetches L4 header offset
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
size_t net_rx_pkt_get_l4_hdr_offset(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* fetches L5 header offset
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
size_t net_rx_pkt_get_l5_hdr_offset(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* fetches IP6 header analysis results
|
|
*
|
|
* Return: pointer to analysis results structure which is stored in internal
|
|
* packet area.
|
|
*
|
|
*/
|
|
eth_ip6_hdr_info *net_rx_pkt_get_ip6_info(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* fetches IP4 header analysis results
|
|
*
|
|
* Return: pointer to analysis results structure which is stored in internal
|
|
* packet area.
|
|
*
|
|
*/
|
|
eth_ip4_hdr_info *net_rx_pkt_get_ip4_info(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* fetches L4 header analysis results
|
|
*
|
|
* Return: pointer to analysis results structure which is stored in internal
|
|
* packet area.
|
|
*
|
|
*/
|
|
eth_l4_hdr_info *net_rx_pkt_get_l4_info(struct NetRxPkt *pkt);
|
|
|
|
typedef enum {
|
|
NetPktRssIpV4,
|
|
NetPktRssIpV4Tcp,
|
|
NetPktRssIpV6Tcp,
|
|
NetPktRssIpV6,
|
|
NetPktRssIpV6Ex,
|
|
NetPktRssIpV6TcpEx,
|
|
NetPktRssIpV4Udp,
|
|
NetPktRssIpV6Udp,
|
|
NetPktRssIpV6UdpEx,
|
|
} NetRxPktRssType;
|
|
|
|
/**
|
|
* calculates RSS hash for packet
|
|
*
|
|
* @pkt: packet
|
|
* @type: RSS hash type
|
|
*
|
|
* Return: Toeplitz RSS hash.
|
|
*
|
|
*/
|
|
uint32_t
|
|
net_rx_pkt_calc_rss_hash(struct NetRxPkt *pkt,
|
|
NetRxPktRssType type,
|
|
uint8_t *key);
|
|
|
|
/**
|
|
* fetches IP identification for the packet
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
uint16_t net_rx_pkt_get_ip_id(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* check if given packet is a TCP ACK packet
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
bool net_rx_pkt_is_tcp_ack(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* check if given packet contains TCP data
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
bool net_rx_pkt_has_tcp_data(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* returns virtio header stored in rx context
|
|
*
|
|
* @pkt: packet
|
|
* @ret: virtio header
|
|
*
|
|
*/
|
|
struct virtio_net_hdr *net_rx_pkt_get_vhdr(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* returns packet type
|
|
*
|
|
* @pkt: packet
|
|
* @ret: packet type
|
|
*
|
|
*/
|
|
eth_pkt_types_e net_rx_pkt_get_packet_type(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* returns vlan tag
|
|
*
|
|
* @pkt: packet
|
|
* @ret: VLAN tag
|
|
*
|
|
*/
|
|
uint16_t net_rx_pkt_get_vlan_tag(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* tells whether vlan was stripped from the packet
|
|
*
|
|
* @pkt: packet
|
|
* @ret: VLAN stripped sign
|
|
*
|
|
*/
|
|
bool net_rx_pkt_is_vlan_stripped(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* notifies caller if the packet has virtio header
|
|
*
|
|
* @pkt: packet
|
|
* @ret: true if packet has virtio header, false otherwize
|
|
*
|
|
*/
|
|
bool net_rx_pkt_has_virt_hdr(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* attach scatter-gather data to rx packet
|
|
*
|
|
* @pkt: packet
|
|
* @iov: received data scatter-gather list
|
|
* @iovcnt number of elements in iov
|
|
* @iovoff data start offset in the iov
|
|
* @strip_vlan: should the module strip vlan from data
|
|
*
|
|
*/
|
|
void net_rx_pkt_attach_iovec(struct NetRxPkt *pkt,
|
|
const struct iovec *iov,
|
|
int iovcnt, size_t iovoff,
|
|
bool strip_vlan);
|
|
|
|
/**
|
|
* attach scatter-gather data to rx packet
|
|
*
|
|
* @pkt: packet
|
|
* @iov: received data scatter-gather list
|
|
* @iovcnt number of elements in iov
|
|
* @iovoff data start offset in the iov
|
|
* @strip_vlan: should the module strip vlan from data
|
|
* @vet: VLAN tag Ethernet type
|
|
*
|
|
*/
|
|
void net_rx_pkt_attach_iovec_ex(struct NetRxPkt *pkt,
|
|
const struct iovec *iov, int iovcnt,
|
|
size_t iovoff, bool strip_vlan,
|
|
uint16_t vet);
|
|
|
|
/**
|
|
* attach data to rx packet
|
|
*
|
|
* @pkt: packet
|
|
* @data: pointer to the data buffer
|
|
* @len: data length
|
|
* @strip_vlan: should the module strip vlan from data
|
|
*
|
|
*/
|
|
static inline void
|
|
net_rx_pkt_attach_data(struct NetRxPkt *pkt, const void *data,
|
|
size_t len, bool strip_vlan)
|
|
{
|
|
const struct iovec iov = {
|
|
.iov_base = (void *) data,
|
|
.iov_len = len
|
|
};
|
|
|
|
net_rx_pkt_attach_iovec(pkt, &iov, 1, 0, strip_vlan);
|
|
}
|
|
|
|
/**
|
|
* returns io vector that holds the attached data
|
|
*
|
|
* @pkt: packet
|
|
* @ret: pointer to IOVec
|
|
*
|
|
*/
|
|
struct iovec *net_rx_pkt_get_iovec(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* returns io vector length that holds the attached data
|
|
*
|
|
* @pkt: packet
|
|
* @ret: IOVec length
|
|
*
|
|
*/
|
|
uint16_t net_rx_pkt_get_iovec_len(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* prints rx packet data if debug is enabled
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
void net_rx_pkt_dump(struct NetRxPkt *pkt);
|
|
|
|
/**
|
|
* copy passed vhdr data to packet context
|
|
*
|
|
* @pkt: packet
|
|
* @vhdr: VHDR buffer
|
|
*
|
|
*/
|
|
void net_rx_pkt_set_vhdr(struct NetRxPkt *pkt,
|
|
struct virtio_net_hdr *vhdr);
|
|
|
|
/**
|
|
* copy passed vhdr data to packet context
|
|
*
|
|
* @pkt: packet
|
|
* @iov: VHDR iov
|
|
* @iovcnt: VHDR iov array size
|
|
*
|
|
*/
|
|
void net_rx_pkt_set_vhdr_iovec(struct NetRxPkt *pkt,
|
|
const struct iovec *iov, int iovcnt);
|
|
|
|
/**
|
|
* save packet type in packet context
|
|
*
|
|
* @pkt: packet
|
|
* @packet_type: the packet type
|
|
*
|
|
*/
|
|
void net_rx_pkt_set_packet_type(struct NetRxPkt *pkt,
|
|
eth_pkt_types_e packet_type);
|
|
|
|
/**
|
|
* validate TCP/UDP checksum of the packet
|
|
*
|
|
* @pkt: packet
|
|
* @csum_valid: checksum validation result
|
|
* @ret: true if validation was performed, false in case packet is
|
|
* not TCP/UDP or checksum validation is not possible
|
|
*
|
|
*/
|
|
bool net_rx_pkt_validate_l4_csum(struct NetRxPkt *pkt, bool *csum_valid);
|
|
|
|
/**
|
|
* validate IPv4 checksum of the packet
|
|
*
|
|
* @pkt: packet
|
|
* @csum_valid: checksum validation result
|
|
* @ret: true if validation was performed, false in case packet is
|
|
* not TCP/UDP or checksum validation is not possible
|
|
*
|
|
*/
|
|
bool net_rx_pkt_validate_l3_csum(struct NetRxPkt *pkt, bool *csum_valid);
|
|
|
|
/**
|
|
* fix IPv4 checksum of the packet
|
|
*
|
|
* @pkt: packet
|
|
* @ret: true if checksum was fixed, false in case packet is
|
|
* not TCP/UDP or checksum correction is not possible
|
|
*
|
|
*/
|
|
bool net_rx_pkt_fix_l4_csum(struct NetRxPkt *pkt);
|
|
|
|
#endif
|