/*-
* BSD LICENSE
- *
- * Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * Copyright 2014 6WIND S.A.
* All rights reserved.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
- *
+ *
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
- *
+ *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
#include <rte_string_fns.h>
#include "testpmd.h"
-
-
#define IP_DEFTTL 64 /* from RFC 1340. */
#define IP_VERSION 0x40
#define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
#define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
-static inline uint16_t
-get_16b_sum(uint16_t *ptr16, uint32_t nr)
-{
- uint32_t sum = 0;
- while (nr > 1)
- {
- sum +=*ptr16;
- nr -= sizeof(uint16_t);
- ptr16++;
- if (sum > UINT16_MAX)
- sum -= UINT16_MAX;
- }
-
- /* If length is in odd bytes */
- if (nr)
- sum += *((uint8_t*)ptr16);
+/* we cannot use htons() from arpa/inet.h due to name conflicts, and we
+ * cannot use rte_cpu_to_be_16() on a constant in a switch/case */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define _htons(x) ((uint16_t)((((x) & 0x00ffU) << 8) | (((x) & 0xff00U) >> 8)))
+#else
+#define _htons(x) (x)
+#endif
- sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
- sum &= 0x0ffff;
- return (uint16_t)sum;
+static uint16_t
+get_psd_sum(void *l3_hdr, uint16_t ethertype)
+{
+ if (ethertype == _htons(ETHER_TYPE_IPv4))
+ return rte_ipv4_phdr_cksum(l3_hdr);
+ else /* assume ethertype == ETHER_TYPE_IPv6 */
+ return rte_ipv6_phdr_cksum(l3_hdr);
}
-static inline uint16_t
-get_ipv4_cksum(struct ipv4_hdr *ipv4_hdr)
+static uint16_t
+get_udptcp_checksum(void *l3_hdr, void *l4_hdr, uint16_t ethertype)
{
- uint16_t cksum;
- cksum = get_16b_sum((uint16_t*)ipv4_hdr, sizeof(struct ipv4_hdr));
- return (uint16_t)((cksum == 0xffff)?cksum:~cksum);
+ if (ethertype == _htons(ETHER_TYPE_IPv4))
+ return rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
+ else /* assume ethertype == ETHER_TYPE_IPv6 */
+ return rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
}
-
-static inline uint16_t
-get_ipv4_psd_sum (struct ipv4_hdr * ip_hdr)
+/*
+ * Parse an ethernet header to fill the ethertype, l2_len, l3_len and
+ * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
+ * header.
+ */
+static void
+parse_ethernet(struct ether_hdr *eth_hdr, uint16_t *ethertype, uint16_t *l2_len,
+ uint16_t *l3_len, uint8_t *l4_proto)
{
- /* Pseudo Header for IPv4/UDP/TCP checksum */
- union ipv4_psd_header {
- struct {
- uint32_t src_addr; /* IP address of source host. */
- uint32_t dst_addr; /* IP address of destination host(s). */
- uint8_t zero; /* zero. */
- uint8_t proto; /* L4 protocol type. */
- uint16_t len; /* L4 length. */
- } __attribute__((__packed__));
- uint16_t u16_arr[0];
- } psd_hdr;
-
- psd_hdr.src_addr = ip_hdr->src_addr;
- psd_hdr.dst_addr = ip_hdr->dst_addr;
- psd_hdr.zero = 0;
- psd_hdr.proto = ip_hdr->next_proto_id;
- psd_hdr.len = rte_cpu_to_be_16((uint16_t)(rte_be_to_cpu_16(ip_hdr->total_length)
- - sizeof(struct ipv4_hdr)));
- return get_16b_sum(psd_hdr.u16_arr, sizeof(psd_hdr));
+ struct ipv4_hdr *ipv4_hdr;
+ struct ipv6_hdr *ipv6_hdr;
+
+ *l2_len = sizeof(struct ether_hdr);
+ *ethertype = eth_hdr->ether_type;
+
+ if (*ethertype == _htons(ETHER_TYPE_VLAN)) {
+ struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
+
+ *l2_len += sizeof(struct vlan_hdr);
+ *ethertype = vlan_hdr->eth_proto;
+ }
+
+ switch (*ethertype) {
+ case _htons(ETHER_TYPE_IPv4):
+ ipv4_hdr = (struct ipv4_hdr *) ((char *)eth_hdr + *l2_len);
+ *l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4;
+ *l4_proto = ipv4_hdr->next_proto_id;
+ break;
+ case _htons(ETHER_TYPE_IPv6):
+ ipv6_hdr = (struct ipv6_hdr *) ((char *)eth_hdr + *l2_len);
+ *l3_len = sizeof(struct ipv6_hdr);
+ *l4_proto = ipv6_hdr->proto;
+ break;
+ default:
+ *l3_len = 0;
+ *l4_proto = 0;
+ break;
+ }
}
-static inline uint16_t
-get_ipv6_psd_sum (struct ipv6_hdr * ip_hdr)
+/* modify the IPv4 or IPv4 source address of a packet */
+static void
+change_ip_addresses(void *l3_hdr, uint16_t ethertype)
{
- /* Pseudo Header for IPv6/UDP/TCP checksum */
- union ipv6_psd_header {
- struct {
- uint8_t src_addr[16]; /* IP address of source host. */
- uint8_t dst_addr[16]; /* IP address of destination host(s). */
- uint32_t len; /* L4 length. */
- uint32_t proto; /* L4 protocol - top 3 bytes must be zero */
- } __attribute__((__packed__));
-
- uint16_t u16_arr[0]; /* allow use as 16-bit values with safe aliasing */
- } psd_hdr;
-
- rte_memcpy(&psd_hdr.src_addr, ip_hdr->src_addr,
- sizeof(ip_hdr->src_addr) + sizeof(ip_hdr->dst_addr));
- psd_hdr.len = ip_hdr->payload_len;
- psd_hdr.proto = (ip_hdr->proto << 24);
-
- return get_16b_sum(psd_hdr.u16_arr, sizeof(psd_hdr));
+ struct ipv4_hdr *ipv4_hdr = l3_hdr;
+ struct ipv6_hdr *ipv6_hdr = l3_hdr;
+
+ if (ethertype == _htons(ETHER_TYPE_IPv4)) {
+ ipv4_hdr->src_addr =
+ rte_cpu_to_be_32(rte_be_to_cpu_32(ipv4_hdr->src_addr) + 1);
+ } else if (ethertype == _htons(ETHER_TYPE_IPv6)) {
+ ipv6_hdr->src_addr[15] = ipv6_hdr->src_addr[15] + 1;
+ }
}
-static inline uint16_t
-get_ipv4_udptcp_checksum(struct ipv4_hdr *ipv4_hdr, uint16_t *l4_hdr)
+/* if possible, calculate the checksum of a packet in hw or sw,
+ * depending on the testpmd command line configuration */
+static uint64_t
+process_inner_cksums(void *l3_hdr, uint16_t ethertype, uint16_t l3_len,
+ uint8_t l4_proto, uint16_t testpmd_ol_flags)
{
- uint32_t cksum;
- uint32_t l4_len;
-
- l4_len = rte_be_to_cpu_16(ipv4_hdr->total_length) - sizeof(struct ipv4_hdr);
-
- cksum = get_16b_sum(l4_hdr, l4_len);
- cksum += get_ipv4_psd_sum(ipv4_hdr);
-
- cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
- cksum = (~cksum) & 0xffff;
- if (cksum == 0)
- cksum = 0xffff;
- return (uint16_t)cksum;
+ struct ipv4_hdr *ipv4_hdr = l3_hdr;
+ struct udp_hdr *udp_hdr;
+ struct tcp_hdr *tcp_hdr;
+ struct sctp_hdr *sctp_hdr;
+ uint64_t ol_flags = 0;
+
+ if (ethertype == _htons(ETHER_TYPE_IPv4)) {
+ ipv4_hdr = l3_hdr;
+ ipv4_hdr->hdr_checksum = 0;
+
+ if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM)
+ ol_flags |= PKT_TX_IP_CKSUM;
+ else
+ ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
+
+ ol_flags |= PKT_TX_IPV4;
+ } else if (ethertype == _htons(ETHER_TYPE_IPv6))
+ ol_flags |= PKT_TX_IPV6;
+ else
+ return 0; /* packet type not supported, nothing to do */
+
+ if (l4_proto == IPPROTO_UDP) {
+ udp_hdr = (struct udp_hdr *)((char *)l3_hdr + l3_len);
+ /* do not recalculate udp cksum if it was 0 */
+ if (udp_hdr->dgram_cksum != 0) {
+ udp_hdr->dgram_cksum = 0;
+ if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_UDP_CKSUM) {
+ ol_flags |= PKT_TX_UDP_CKSUM;
+ udp_hdr->dgram_cksum = get_psd_sum(l3_hdr,
+ ethertype);
+ } else {
+ udp_hdr->dgram_cksum =
+ get_udptcp_checksum(l3_hdr, udp_hdr,
+ ethertype);
+ }
+ }
+ } else if (l4_proto == IPPROTO_TCP) {
+ tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + l3_len);
+ tcp_hdr->cksum = 0;
+ if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_TCP_CKSUM) {
+ ol_flags |= PKT_TX_TCP_CKSUM;
+ tcp_hdr->cksum = get_psd_sum(l3_hdr, ethertype);
+ } else {
+ tcp_hdr->cksum =
+ get_udptcp_checksum(l3_hdr, tcp_hdr, ethertype);
+ }
+ } else if (l4_proto == IPPROTO_SCTP) {
+ sctp_hdr = (struct sctp_hdr *)((char *)l3_hdr + l3_len);
+ sctp_hdr->cksum = 0;
+ /* sctp payload must be a multiple of 4 to be
+ * offloaded */
+ if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_SCTP_CKSUM) &&
+ ((ipv4_hdr->total_length & 0x3) == 0)) {
+ ol_flags |= PKT_TX_SCTP_CKSUM;
+ } else {
+ /* XXX implement CRC32c, example available in
+ * RFC3309 */
+ }
+ }
+ return ol_flags;
}
-static inline uint16_t
-get_ipv6_udptcp_checksum(struct ipv6_hdr *ipv6_hdr, uint16_t *l4_hdr)
+/* Calculate the checksum of outer header (only vxlan is supported,
+ * meaning IP + UDP). The caller already checked that it's a vxlan
+ * packet */
+static uint64_t
+process_outer_cksums(void *outer_l3_hdr, uint16_t outer_ethertype,
+ uint16_t outer_l3_len, uint16_t testpmd_ol_flags)
{
- uint32_t cksum;
- uint32_t l4_len;
+ struct ipv4_hdr *ipv4_hdr = outer_l3_hdr;
+ struct ipv6_hdr *ipv6_hdr = outer_l3_hdr;
+ struct udp_hdr *udp_hdr;
+ uint64_t ol_flags = 0;
- l4_len = rte_be_to_cpu_16(ipv6_hdr->payload_len);
+ if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM)
+ ol_flags |= PKT_TX_VXLAN_CKSUM;
- cksum = get_16b_sum(l4_hdr, l4_len);
- cksum += get_ipv6_psd_sum(ipv6_hdr);
+ if (outer_ethertype == _htons(ETHER_TYPE_IPv4)) {
+ ipv4_hdr->hdr_checksum = 0;
- cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
- cksum = (~cksum) & 0xffff;
- if (cksum == 0)
- cksum = 0xffff;
+ if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM) == 0)
+ ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
+ }
- return (uint16_t)cksum;
-}
+ udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + outer_l3_len);
+ /* do not recalculate udp cksum if it was 0 */
+ if (udp_hdr->dgram_cksum != 0) {
+ udp_hdr->dgram_cksum = 0;
+ if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM) == 0) {
+ if (outer_ethertype == _htons(ETHER_TYPE_IPv4))
+ udp_hdr->dgram_cksum =
+ rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr);
+ else
+ udp_hdr->dgram_cksum =
+ rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr);
+ }
+ }
+ return ol_flags;
+}
/*
- * Forwarding of packets. Change the checksum field with HW or SW methods
- * The HW/SW method selection depends on the ol_flags on every packet
+ * Receive a burst of packets, and for each packet:
+ * - parse packet, and try to recognize a supported packet type (1)
+ * - if it's not a supported packet type, don't touch the packet, else:
+ * - modify the IPs in inner headers and in outer headers if any
+ * - reprocess the checksum of all supported layers. This is done in SW
+ * or HW, depending on testpmd command line configuration
+ * Then transmit packets on the output port.
+ *
+ * (1) Supported packets are:
+ * Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
+ * Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
+ * UDP|TCP|SCTP
+ *
+ * The testpmd command line for this forward engine sets the flags
+ * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
+ * wether a checksum must be calculated in software or in hardware. The
+ * IP, UDP, TCP and SCTP flags always concern the inner layer. The
+ * VxLAN flag concerns the outer IP and UDP layer (if packet is
+ * recognized as a vxlan packet).
*/
static void
pkt_burst_checksum_forward(struct fwd_stream *fs)
{
- struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
- struct rte_port *txp;
- struct rte_mbuf *mb;
+ struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+ struct rte_port *txp;
+ struct rte_mbuf *m;
struct ether_hdr *eth_hdr;
- struct ipv4_hdr *ipv4_hdr;
- struct ipv6_hdr *ipv6_hdr;
- struct udp_hdr *udp_hdr;
- struct tcp_hdr *tcp_hdr;
- struct sctp_hdr *sctp_hdr;
-
+ void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
+ struct udp_hdr *udp_hdr;
uint16_t nb_rx;
uint16_t nb_tx;
uint16_t i;
- uint16_t ol_flags;
- uint16_t pkt_ol_flags;
- uint16_t tx_ol_flags;
- uint16_t l4_proto;
- uint16_t eth_type;
- uint8_t l2_len;
- uint8_t l3_len;
-
+ uint64_t ol_flags;
+ uint16_t testpmd_ol_flags;
+ uint8_t l4_proto;
+ uint16_t ethertype = 0, outer_ethertype = 0;
+ uint16_t l2_len = 0, l3_len = 0, outer_l2_len = 0, outer_l3_len = 0;
+ int tunnel = 0;
uint32_t rx_bad_ip_csum;
uint32_t rx_bad_l4_csum;
start_tsc = rte_rdtsc();
#endif
- /*
- * Receive a burst of packets and forward them.
- */
+ /* receive a burst of packet */
nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
nb_pkt_per_burst);
if (unlikely(nb_rx == 0))
rx_bad_l4_csum = 0;
txp = &ports[fs->tx_port];
- tx_ol_flags = txp->tx_ol_flags;
+ testpmd_ol_flags = txp->tx_ol_flags;
for (i = 0; i < nb_rx; i++) {
- mb = pkts_burst[i];
- l2_len = sizeof(struct ether_hdr);
- pkt_ol_flags = mb->ol_flags;
- ol_flags = (uint16_t) (pkt_ol_flags & (~PKT_TX_L4_MASK));
-
- eth_hdr = (struct ether_hdr *) mb->pkt.data;
- eth_type = rte_be_to_cpu_16(eth_hdr->ether_type);
- if (eth_type == ETHER_TYPE_VLAN) {
- /* Only allow single VLAN label here */
- l2_len += sizeof(struct vlan_hdr);
- eth_type = rte_be_to_cpu_16(*(uint16_t *)
- ((uintptr_t)ð_hdr->ether_type +
- sizeof(struct vlan_hdr)));
+ ol_flags = 0;
+ tunnel = 0;
+ m = pkts_burst[i];
+
+ /* Update the L3/L4 checksum error packet statistics */
+ rx_bad_ip_csum += ((m->ol_flags & PKT_RX_IP_CKSUM_BAD) != 0);
+ rx_bad_l4_csum += ((m->ol_flags & PKT_RX_L4_CKSUM_BAD) != 0);
+
+ /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
+ * and inner headers */
+
+ eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+ parse_ethernet(eth_hdr, ðertype, &l2_len, &l3_len, &l4_proto);
+ l3_hdr = (char *)eth_hdr + l2_len;
+
+ /* check if it's a supported tunnel (only vxlan for now) */
+ if (l4_proto == IPPROTO_UDP) {
+ udp_hdr = (struct udp_hdr *)((char *)l3_hdr + l3_len);
+
+ /* currently, this flag is set by i40e only if the
+ * packet is vxlan */
+ if (((m->ol_flags & PKT_RX_TUNNEL_IPV4_HDR) ||
+ (m->ol_flags & PKT_RX_TUNNEL_IPV6_HDR)))
+ tunnel = 1;
+ /* else check udp destination port, 4789 is the default
+ * vxlan port (rfc7348) */
+ else if (udp_hdr->dst_port == _htons(4789))
+ tunnel = 1;
+
+ if (tunnel == 1) {
+ outer_ethertype = ethertype;
+ outer_l2_len = l2_len;
+ outer_l3_len = l3_len;
+ outer_l3_hdr = l3_hdr;
+
+ eth_hdr = (struct ether_hdr *)((char *)udp_hdr +
+ sizeof(struct udp_hdr) +
+ sizeof(struct vxlan_hdr));
+
+ parse_ethernet(eth_hdr, ðertype, &l2_len,
+ &l3_len, &l4_proto);
+ l3_hdr = (char *)eth_hdr + l2_len;
+ }
}
- /* Update the L3/L4 checksum error packet count */
- rx_bad_ip_csum += (uint16_t) ((pkt_ol_flags & PKT_RX_IP_CKSUM_BAD) != 0);
- rx_bad_l4_csum += (uint16_t) ((pkt_ol_flags & PKT_RX_L4_CKSUM_BAD) != 0);
-
- /*
- * Try to figure out L3 packet type by SW.
- */
- if ((pkt_ol_flags & (PKT_RX_IPV4_HDR | PKT_RX_IPV4_HDR_EXT |
- PKT_RX_IPV6_HDR | PKT_RX_IPV6_HDR_EXT)) == 0) {
- if (eth_type == ETHER_TYPE_IPv4)
- pkt_ol_flags |= PKT_RX_IPV4_HDR;
- else if (eth_type == ETHER_TYPE_IPv6)
- pkt_ol_flags |= PKT_RX_IPV6_HDR;
- }
+ /* step 2: change all source IPs (v4 or v6) so we need
+ * to recompute the chksums even if they were correct */
- /*
- * Simplify the protocol parsing
- * Assuming the incoming packets format as
- * Ethernet2 + optional single VLAN
- * + ipv4 or ipv6
- * + udp or tcp or sctp or others
- */
- if (pkt_ol_flags & PKT_RX_IPV4_HDR) {
+ change_ip_addresses(l3_hdr, ethertype);
+ if (tunnel == 1)
+ change_ip_addresses(outer_l3_hdr, outer_ethertype);
- /* Do not support ipv4 option field */
- l3_len = sizeof(struct ipv4_hdr) ;
+ /* step 3: depending on user command line configuration,
+ * recompute checksum either in software or flag the
+ * mbuf to offload the calculation to the NIC */
- ipv4_hdr = (struct ipv4_hdr *) (rte_pktmbuf_mtod(mb,
- unsigned char *) + l2_len);
+ /* process checksums of inner headers first */
+ ol_flags |= process_inner_cksums(l3_hdr, ethertype,
+ l3_len, l4_proto, testpmd_ol_flags);
- l4_proto = ipv4_hdr->next_proto_id;
+ /* Then process outer headers if any. Note that the software
+ * checksum will be wrong if one of the inner checksums is
+ * processed in hardware. */
+ if (tunnel == 1) {
+ ol_flags |= process_outer_cksums(outer_l3_hdr,
+ outer_ethertype, outer_l3_len, testpmd_ol_flags);
+ }
- /* Do not delete, this is required by HW*/
- ipv4_hdr->hdr_checksum = 0;
+ /* step 4: fill the mbuf meta data (flags and header lengths) */
- if (tx_ol_flags & 0x1) {
- /* HW checksum */
- ol_flags |= PKT_TX_IP_CKSUM;
+ if (tunnel == 1) {
+ if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM) {
+ m->l2_len = outer_l2_len;
+ m->l3_len = outer_l3_len;
+ m->inner_l2_len = l2_len;
+ m->inner_l3_len = l3_len;
}
else {
- /* SW checksum calculation */
- ipv4_hdr->src_addr++;
- ipv4_hdr->hdr_checksum = get_ipv4_cksum(ipv4_hdr);
- }
-
- if (l4_proto == IPPROTO_UDP) {
- udp_hdr = (struct udp_hdr*) (rte_pktmbuf_mtod(mb,
- unsigned char *) + l2_len + l3_len);
- if (tx_ol_flags & 0x2) {
- /* HW Offload */
- ol_flags |= PKT_TX_UDP_CKSUM;
- /* Pseudo header sum need be set properly */
- udp_hdr->dgram_cksum = get_ipv4_psd_sum(ipv4_hdr);
- }
- else {
- /* SW Implementation, clear checksum field first */
- udp_hdr->dgram_cksum = 0;
- udp_hdr->dgram_cksum = get_ipv4_udptcp_checksum(ipv4_hdr,
- (uint16_t*)udp_hdr);
- }
- }
- else if (l4_proto == IPPROTO_TCP){
- tcp_hdr = (struct tcp_hdr*) (rte_pktmbuf_mtod(mb,
- unsigned char *) + l2_len + l3_len);
- if (tx_ol_flags & 0x4) {
- ol_flags |= PKT_TX_TCP_CKSUM;
- tcp_hdr->cksum = get_ipv4_psd_sum(ipv4_hdr);
- }
- else {
- tcp_hdr->cksum = 0;
- tcp_hdr->cksum = get_ipv4_udptcp_checksum(ipv4_hdr,
- (uint16_t*)tcp_hdr);
- }
- }
- else if (l4_proto == IPPROTO_SCTP) {
- sctp_hdr = (struct sctp_hdr*) (rte_pktmbuf_mtod(mb,
- unsigned char *) + l2_len + l3_len);
-
- if (tx_ol_flags & 0x8) {
- ol_flags |= PKT_TX_SCTP_CKSUM;
- sctp_hdr->cksum = 0;
-
- /* Sanity check, only number of 4 bytes supported */
- if ((rte_be_to_cpu_16(ipv4_hdr->total_length) % 4) != 0)
- printf("sctp payload must be a multiple "
- "of 4 bytes for checksum offload");
- }
- else {
- sctp_hdr->cksum = 0;
- /* CRC32c sample code available in RFC3309 */
- }
- }
- /* End of L4 Handling*/
- }
- else if (pkt_ol_flags & PKT_RX_IPV6_HDR) {
-
- ipv6_hdr = (struct ipv6_hdr *) (rte_pktmbuf_mtod(mb,
- unsigned char *) + l2_len);
- l3_len = sizeof(struct ipv6_hdr) ;
- l4_proto = ipv6_hdr->proto;
-
- if (l4_proto == IPPROTO_UDP) {
- udp_hdr = (struct udp_hdr*) (rte_pktmbuf_mtod(mb,
- unsigned char *) + l2_len + l3_len);
- if (tx_ol_flags & 0x2) {
- /* HW Offload */
- ol_flags |= PKT_TX_UDP_CKSUM;
- udp_hdr->dgram_cksum = get_ipv6_psd_sum(ipv6_hdr);
- }
- else {
- /* SW Implementation */
- /* checksum field need be clear first */
- udp_hdr->dgram_cksum = 0;
- udp_hdr->dgram_cksum = get_ipv6_udptcp_checksum(ipv6_hdr,
- (uint16_t*)udp_hdr);
- }
- }
- else if (l4_proto == IPPROTO_TCP) {
- tcp_hdr = (struct tcp_hdr*) (rte_pktmbuf_mtod(mb,
- unsigned char *) + l2_len + l3_len);
- if (tx_ol_flags & 0x4) {
- ol_flags |= PKT_TX_TCP_CKSUM;
- tcp_hdr->cksum = get_ipv6_psd_sum(ipv6_hdr);
- }
- else {
- tcp_hdr->cksum = 0;
- tcp_hdr->cksum = get_ipv6_udptcp_checksum(ipv6_hdr,
- (uint16_t*)tcp_hdr);
- }
- }
- else if (l4_proto == IPPROTO_SCTP) {
- sctp_hdr = (struct sctp_hdr*) (rte_pktmbuf_mtod(mb,
- unsigned char *) + l2_len + l3_len);
-
- if (tx_ol_flags & 0x8) {
- ol_flags |= PKT_TX_SCTP_CKSUM;
- sctp_hdr->cksum = 0;
- /* Sanity check, only number of 4 bytes supported by HW */
- if ((rte_be_to_cpu_16(ipv6_hdr->payload_len) % 4) != 0)
- printf("sctp payload must be a multiple "
- "of 4 bytes for checksum offload");
- }
- else {
- /* CRC32c sample code available in RFC3309 */
- sctp_hdr->cksum = 0;
- }
- } else {
- printf("Test flow control for 1G PMD \n");
+ /* if we don't do vxlan cksum in hw,
+ outer checksum will be wrong because
+ we changed the ip, but it shows that
+ we can process the inner header cksum
+ in the nic */
+ m->l2_len = outer_l2_len + outer_l3_len +
+ sizeof(struct udp_hdr) +
+ sizeof(struct vxlan_hdr) + l2_len;
+ m->l3_len = l3_len;
}
- /* End of L6 Handling*/
- }
- else {
- l3_len = 0;
- printf("Unhandled packet type: %#hx\n", eth_type);
+ } else {
+ /* this is only useful if an offload flag is
+ * set, but it does not hurt to fill it in any
+ * case */
+ m->l2_len = l2_len;
+ m->l3_len = l3_len;
}
+ m->ol_flags = ol_flags;
- /* Combine the packet header write. VLAN is not consider here */
- mb->pkt.vlan_macip.f.l2_len = l2_len;
- mb->pkt.vlan_macip.f.l3_len = l3_len;
- mb->ol_flags = ol_flags;
}
nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
fs->tx_packets += nb_tx;
#endif
}
-
struct fwd_engine csum_fwd_engine = {
.fwd_mode_name = "csum",
.port_fwd_begin = NULL,
git.droids-corp.org / dpdk.git / blobdiff