2 * QEMU RX packets abstraction
4 * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
6 * Developed by Daynix Computing LTD (http://www.daynix.com)
13 * This work is licensed under the terms of the GNU GPL, version 2 or later.
14 * See the COPYING file in the top-level directory.
23 /* defines to enable packet dump functions */
24 /*#define NET_RX_PKT_DEBUG*/
29 * Clean all rx packet resources
34 void net_rx_pkt_uninit(struct NetRxPkt *pkt);
37 * Init function for rx packet functionality
39 * @pkt: packet pointer
40 * @has_virt_hdr: device uses virtio header
43 void net_rx_pkt_init(struct NetRxPkt **pkt, bool has_virt_hdr);
46 * returns total length of data attached to rx context
53 size_t net_rx_pkt_get_total_len(struct NetRxPkt *pkt);
56 * parse and set packet analysis results
59 * @data: pointer to the data buffer to be parsed
63 void net_rx_pkt_set_protocols(struct NetRxPkt *pkt, const void *data,
67 * fetches packet analysis results
70 * @isip4: whether the packet given is IPv4
71 * @isip6: whether the packet given is IPv6
72 * @isudp: whether the packet given is UDP
73 * @istcp: whether the packet given is TCP
76 void net_rx_pkt_get_protocols(struct NetRxPkt *pkt,
77 bool *isip4, bool *isip6,
78 bool *isudp, bool *istcp);
81 * fetches L3 header offset
86 size_t net_rx_pkt_get_l3_hdr_offset(struct NetRxPkt *pkt);
89 * fetches L4 header offset
94 size_t net_rx_pkt_get_l4_hdr_offset(struct NetRxPkt *pkt);
97 * fetches L5 header offset
102 size_t net_rx_pkt_get_l5_hdr_offset(struct NetRxPkt *pkt);
105 * fetches IP6 header analysis results
107 * Return: pointer to analysis results structure which is stored in internal
111 eth_ip6_hdr_info *net_rx_pkt_get_ip6_info(struct NetRxPkt *pkt);
114 * fetches IP4 header analysis results
116 * Return: pointer to analysis results structure which is stored in internal
120 eth_ip4_hdr_info *net_rx_pkt_get_ip4_info(struct NetRxPkt *pkt);
123 * fetches L4 header analysis results
125 * Return: pointer to analysis results structure which is stored in internal
129 eth_l4_hdr_info *net_rx_pkt_get_l4_info(struct NetRxPkt *pkt);
140 * calculates RSS hash for packet
143 * @type: RSS hash type
145 * Return: Toeplitz RSS hash.
149 net_rx_pkt_calc_rss_hash(struct NetRxPkt *pkt,
150 NetRxPktRssType type,
154 * fetches IP identification for the packet
159 uint16_t net_rx_pkt_get_ip_id(struct NetRxPkt *pkt);
162 * check if given packet is a TCP ACK packet
167 bool net_rx_pkt_is_tcp_ack(struct NetRxPkt *pkt);
170 * check if given packet contains TCP data
175 bool net_rx_pkt_has_tcp_data(struct NetRxPkt *pkt);
178 * returns virtio header stored in rx context
181 * @ret: virtio header
184 struct virtio_net_hdr *net_rx_pkt_get_vhdr(struct NetRxPkt *pkt);
187 * returns packet type
193 eth_pkt_types_e net_rx_pkt_get_packet_type(struct NetRxPkt *pkt);
202 uint16_t net_rx_pkt_get_vlan_tag(struct NetRxPkt *pkt);
205 * tells whether vlan was stripped from the packet
208 * @ret: VLAN stripped sign
211 bool net_rx_pkt_is_vlan_stripped(struct NetRxPkt *pkt);
214 * notifies caller if the packet has virtio header
217 * @ret: true if packet has virtio header, false otherwize
220 bool net_rx_pkt_has_virt_hdr(struct NetRxPkt *pkt);
223 * attach scatter-gather data to rx packet
226 * @iov: received data scatter-gather list
227 * @iovcnt number of elements in iov
228 * @iovoff data start offset in the iov
229 * @strip_vlan: should the module strip vlan from data
232 void net_rx_pkt_attach_iovec(struct NetRxPkt *pkt,
233 const struct iovec *iov,
234 int iovcnt, size_t iovoff,
238 * attach scatter-gather data to rx packet
241 * @iov: received data scatter-gather list
242 * @iovcnt number of elements in iov
243 * @iovoff data start offset in the iov
244 * @strip_vlan: should the module strip vlan from data
245 * @vet: VLAN tag Ethernet type
248 void net_rx_pkt_attach_iovec_ex(struct NetRxPkt *pkt,
249 const struct iovec *iov, int iovcnt,
250 size_t iovoff, bool strip_vlan,
254 * attach data to rx packet
257 * @data: pointer to the data buffer
259 * @strip_vlan: should the module strip vlan from data
263 net_rx_pkt_attach_data(struct NetRxPkt *pkt, const void *data,
264 size_t len, bool strip_vlan)
266 const struct iovec iov = {
267 .iov_base = (void *) data,
271 net_rx_pkt_attach_iovec(pkt, &iov, 1, 0, strip_vlan);
275 * returns io vector that holds the attached data
278 * @ret: pointer to IOVec
281 struct iovec *net_rx_pkt_get_iovec(struct NetRxPkt *pkt);
284 * returns io vector length that holds the attached data
290 uint16_t net_rx_pkt_get_iovec_len(struct NetRxPkt *pkt);
293 * prints rx packet data if debug is enabled
298 void net_rx_pkt_dump(struct NetRxPkt *pkt);
301 * copy passed vhdr data to packet context
307 void net_rx_pkt_set_vhdr(struct NetRxPkt *pkt,
308 struct virtio_net_hdr *vhdr);
311 * copy passed vhdr data to packet context
315 * @iovcnt: VHDR iov array size
318 void net_rx_pkt_set_vhdr_iovec(struct NetRxPkt *pkt,
319 const struct iovec *iov, int iovcnt);
322 * save packet type in packet context
325 * @packet_type: the packet type
328 void net_rx_pkt_set_packet_type(struct NetRxPkt *pkt,
329 eth_pkt_types_e packet_type);
332 * validate TCP/UDP checksum of the packet
335 * @csum_valid: checksum validation result
336 * @ret: true if validation was performed, false in case packet is
337 * not TCP/UDP or checksum validation is not possible
340 bool net_rx_pkt_validate_l4_csum(struct NetRxPkt *pkt, bool *csum_valid);
343 * validate IPv4 checksum of the packet
346 * @csum_valid: checksum validation result
347 * @ret: true if validation was performed, false in case packet is
348 * not TCP/UDP or checksum validation is not possible
351 bool net_rx_pkt_validate_l3_csum(struct NetRxPkt *pkt, bool *csum_valid);
354 * fix IPv4 checksum of the packet
357 * @ret: true if checksum was fixed, false in case packet is
358 * not TCP/UDP or checksum correction is not possible
361 bool net_rx_pkt_fix_l4_csum(struct NetRxPkt *pkt);