uint16_t l3_len;
uint16_t l4_len;
uint8_t l4_proto;
- uint8_t l4_tun_len;
uint8_t is_tunnel;
uint16_t outer_ethertype;
uint16_t outer_l2_len;
uint16_t outer_l3_len;
+ uint8_t outer_l4_proto;
uint16_t tso_segsz;
};
+/* simplified GRE header (flags must be 0) */
+struct simple_gre_hdr {
+ uint16_t flags;
+ uint16_t proto;
+};
+
static uint16_t
get_psd_sum(void *l3_hdr, uint16_t ethertype, uint64_t ol_flags)
{
}
}
+/* Parse a vxlan header */
+static void
+parse_vxlan(struct udp_hdr *udp_hdr, struct testpmd_offload_info *info,
+ uint64_t mbuf_olflags)
+{
+ struct ether_hdr *eth_hdr;
+
+ /* check udp destination port, 4789 is the default vxlan port
+ * (rfc7348) or that the rx offload flag is set (i40e only
+ * currently) */
+ if (udp_hdr->dst_port != _htons(4789) &&
+ (mbuf_olflags & (PKT_RX_TUNNEL_IPV4_HDR |
+ PKT_RX_TUNNEL_IPV6_HDR)) == 0)
+ return;
+
+ info->is_tunnel = 1;
+ info->outer_ethertype = info->ethertype;
+ info->outer_l2_len = info->l2_len;
+ info->outer_l3_len = info->l3_len;
+ info->outer_l4_proto = info->l4_proto;
+
+ eth_hdr = (struct ether_hdr *)((char *)udp_hdr +
+ sizeof(struct udp_hdr) +
+ sizeof(struct vxlan_hdr));
+
+ parse_ethernet(eth_hdr, info);
+ info->l2_len += ETHER_VXLAN_HLEN; /* add udp + vxlan */
+}
+
+/* Parse a gre header */
+static void
+parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
+{
+ struct ether_hdr *eth_hdr;
+ struct ipv4_hdr *ipv4_hdr;
+ struct ipv6_hdr *ipv6_hdr;
+
+ /* if flags != 0; it's not supported */
+ if (gre_hdr->flags != 0)
+ return;
+
+ if (gre_hdr->proto == _htons(ETHER_TYPE_IPv4)) {
+ info->is_tunnel = 1;
+ info->outer_ethertype = info->ethertype;
+ info->outer_l2_len = info->l2_len;
+ info->outer_l3_len = info->l3_len;
+ info->outer_l4_proto = info->l4_proto;
+
+ ipv4_hdr = (struct ipv4_hdr *)((char *)gre_hdr +
+ sizeof(struct simple_gre_hdr));
+
+ parse_ipv4(ipv4_hdr, info);
+ info->ethertype = _htons(ETHER_TYPE_IPv4);
+ info->l2_len = 0;
+
+ } else if (gre_hdr->proto == _htons(ETHER_TYPE_IPv6)) {
+ info->is_tunnel = 1;
+ info->outer_ethertype = info->ethertype;
+ info->outer_l2_len = info->l2_len;
+ info->outer_l3_len = info->l3_len;
+ info->outer_l4_proto = info->l4_proto;
+
+ ipv6_hdr = (struct ipv6_hdr *)((char *)gre_hdr +
+ sizeof(struct simple_gre_hdr));
+
+ info->ethertype = _htons(ETHER_TYPE_IPv6);
+ parse_ipv6(ipv6_hdr, info);
+ info->l2_len = 0;
+
+ } else if (gre_hdr->proto == _htons(0x6558)) { /* ETH_P_TEB in linux */
+ info->is_tunnel = 1;
+ info->outer_ethertype = info->ethertype;
+ info->outer_l2_len = info->l2_len;
+ info->outer_l3_len = info->l3_len;
+ info->outer_l4_proto = info->l4_proto;
+
+ eth_hdr = (struct ether_hdr *)((char *)gre_hdr +
+ sizeof(struct simple_gre_hdr));
+
+ parse_ethernet(eth_hdr, info);
+ } else
+ return;
+
+ info->l2_len += sizeof(struct simple_gre_hdr);
+}
+
+
+/* Parse an encapsulated ip or ipv6 header */
+static void
+parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
+{
+ struct ipv4_hdr *ipv4_hdr = encap_ip;
+ struct ipv6_hdr *ipv6_hdr = encap_ip;
+ uint8_t ip_version;
+
+ ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
+
+ if (ip_version != 4 && ip_version != 6)
+ return;
+
+ info->is_tunnel = 1;
+ info->outer_ethertype = info->ethertype;
+ info->outer_l2_len = info->l2_len;
+ info->outer_l3_len = info->l3_len;
+
+ if (ip_version == 4) {
+ parse_ipv4(ipv4_hdr, info);
+ info->ethertype = _htons(ETHER_TYPE_IPv4);
+ } else {
+ parse_ipv6(ipv6_hdr, info);
+ info->ethertype = _htons(ETHER_TYPE_IPv6);
+ }
+ info->l2_len = 0;
+}
+
/* modify the IPv4 or IPv4 source address of a packet */
static void
change_ip_addresses(void *l3_hdr, uint16_t ethertype)
* packet */
static uint64_t
process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
-uint16_t testpmd_ol_flags)
+ uint16_t testpmd_ol_flags)
{
struct ipv4_hdr *ipv4_hdr = outer_l3_hdr;
struct ipv6_hdr *ipv6_hdr = outer_l3_hdr;
} else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)
ol_flags |= PKT_TX_OUTER_IPV6;
+ if (info->outer_l4_proto != IPPROTO_UDP)
+ return ol_flags;
+
/* outer UDP checksum is always done in software as we have no
* hardware supporting it today, and no API for it. */
* Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
* Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
* UDP|TCP|SCTP
+ * Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
+ * Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
+ * Ether / (vlan) / outer IP|IP6 / 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
struct rte_mbuf *m;
struct ether_hdr *eth_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;
parse_ethernet(eth_hdr, &info);
l3_hdr = (char *)eth_hdr + info.l2_len;
- /* check if it's a supported tunnel (only vxlan for now) */
- if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) &&
- info.l4_proto == IPPROTO_UDP) {
- udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info.l3_len);
-
- /* check udp destination port, 4789 is the default
- * vxlan port (rfc7348) */
- if (udp_hdr->dst_port == _htons(4789)) {
- info.l4_tun_len = ETHER_VXLAN_HLEN;
- info.is_tunnel = 1;
-
- /* currently, this flag is set by i40e only if the
- * packet is vxlan */
- } else if (m->ol_flags & (PKT_RX_TUNNEL_IPV4_HDR |
- PKT_RX_TUNNEL_IPV6_HDR))
- info.is_tunnel = 1;
-
- if (info.is_tunnel == 1) {
- info.outer_ethertype = info.ethertype;
- info.outer_l2_len = info.l2_len;
- info.outer_l3_len = info.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, &info);
- l3_hdr = (char *)eth_hdr + info.l2_len;
+ /* check if it's a supported tunnel */
+ if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) {
+ if (info.l4_proto == IPPROTO_UDP) {
+ struct udp_hdr *udp_hdr;
+ udp_hdr = (struct udp_hdr *)((char *)l3_hdr +
+ info.l3_len);
+ parse_vxlan(udp_hdr, &info, m->ol_flags);
+ } else if (info.l4_proto == IPPROTO_GRE) {
+ struct simple_gre_hdr *gre_hdr;
+ gre_hdr = (struct simple_gre_hdr *)
+ ((char *)l3_hdr + info.l3_len);
+ parse_gre(gre_hdr, &info);
+ } else if (info.l4_proto == IPPROTO_IPIP) {
+ void *encap_ip_hdr;
+ encap_ip_hdr = (char *)l3_hdr + info.l3_len;
+ parse_encap_ip(encap_ip_hdr, &info);
}
}
+ /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
+ if (info.is_tunnel) {
+ outer_l3_hdr = l3_hdr;
+ l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
+ }
+
/* step 2: change all source IPs (v4 or v6) so we need
* to recompute the chksums even if they were correct */
if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) {
m->outer_l2_len = info.outer_l2_len;
m->outer_l3_len = info.outer_l3_len;
- m->l2_len = info.l4_tun_len + info.l2_len;
+ m->l2_len = info.l2_len;
m->l3_len = info.l3_len;
+ m->l4_len = info.l4_len;
}
else {
/* if there is a outer UDP cksum
the payload will be modified by the
hardware */
m->l2_len = info.outer_l2_len +
- info.outer_l3_len +
- sizeof(struct udp_hdr) +
- sizeof(struct vxlan_hdr) + info.l2_len;
+ info.outer_l3_len + info.l2_len;
m->l3_len = info.l3_len;
m->l4_len = info.l4_len;
}
git.droids-corp.org / dpdk.git / blobdiff