#ifndef included_gso_h
#define included_gso_h
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/ip/ip4_packet.h>
-#include <vnet/ip/ip6_packet.h>
-#include <vnet/udp/udp_packet.h>
#include <vnet/vnet.h>
-typedef struct
-{
- i16 l2_hdr_offset;
- i16 l3_hdr_offset;
- i16 l4_hdr_offset;
- u16 l4_hdr_sz;
- i16 outer_l2_hdr_offset;
- i16 outer_l3_hdr_offset;
- i16 outer_l4_hdr_offset;
-} gso_header_offset_t;
-
typedef struct
{
vlib_main_t *vlib_main;
int vnet_sw_interface_gso_enable_disable (u32 sw_if_index, u8 enable);
-static_always_inline gso_header_offset_t
-vnet_gso_header_offset_parser (vlib_buffer_t * b0, int is_ip6)
-{
- gso_header_offset_t gho = { 0 };
- u8 l4_proto = 0;
- u8 l4_hdr_sz = 0;
-
- if (PREDICT_TRUE ((b0->flags & (VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
- VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
- VNET_BUFFER_F_L4_HDR_OFFSET_VALID)) ==
- (VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
- VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
- VNET_BUFFER_F_L4_HDR_OFFSET_VALID)))
- {
- gho.l2_hdr_offset = vnet_buffer (b0)->l2_hdr_offset;
- gho.l3_hdr_offset = vnet_buffer (b0)->l3_hdr_offset;
- gho.l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset;
- gho.l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz;
- return gho;
- }
-
- ethernet_header_t *eh = (ethernet_header_t *) vlib_buffer_get_current (b0);
- u16 ethertype = clib_net_to_host_u16 (eh->type);
- u16 l2hdr_sz = sizeof (ethernet_header_t);
-
- if (ethernet_frame_is_tagged (ethertype))
- {
- ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eh + 1);
-
- ethertype = clib_net_to_host_u16 (vlan->type);
- l2hdr_sz += sizeof (*vlan);
- if (ethertype == ETHERNET_TYPE_VLAN)
- {
- vlan++;
- ethertype = clib_net_to_host_u16 (vlan->type);
- l2hdr_sz += sizeof (*vlan);
- }
- }
-
- gho.l2_hdr_offset = b0->current_data;
- gho.l3_hdr_offset = l2hdr_sz;
-
- if (PREDICT_TRUE (is_ip6 == 0))
- {
- ip4_header_t *ip4 =
- (ip4_header_t *) (vlib_buffer_get_current (b0) + l2hdr_sz);
- gho.l4_hdr_offset = l2hdr_sz + ip4_header_bytes (ip4);
- l4_proto = ip4->protocol;
- }
- else if (PREDICT_TRUE (is_ip6))
- {
- ip6_header_t *ip6 =
- (ip6_header_t *) (vlib_buffer_get_current (b0) + l2hdr_sz);
- /* FIXME IPv6 EH traversal */
- gho.l4_hdr_offset = l2hdr_sz + sizeof (ip6_header_t);
- l4_proto = ip6->protocol;
- }
- if (l4_proto == IP_PROTOCOL_TCP)
- {
- tcp_header_t *tcp = (tcp_header_t *) (vlib_buffer_get_current (b0) +
- gho.l4_hdr_offset);
- l4_hdr_sz = tcp_header_bytes (tcp);
- tcp->checksum = 0;
- }
- else if (l4_proto == IP_PROTOCOL_UDP)
- {
- udp_header_t *udp = (udp_header_t *) (vlib_buffer_get_current (b0) +
- gho.l4_hdr_offset);
- l4_hdr_sz = sizeof (*udp);
- udp->checksum = 0;
- }
-
- if (b0->flags & (VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_IS_IP6))
- {
- gho.l4_hdr_sz = l4_hdr_sz;
- }
-
- return gho;
-}
-
#endif /* included_gso_h */
/*