diff options
Diffstat (limited to 'src/vnet/gso/gso.h')
| -rw-r--r-- | src/vnet/gso/gso.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/vnet/gso/gso.h b/src/vnet/gso/gso.h index 8e174dfd1f6..79869c2644b 100644 --- a/src/vnet/gso/gso.h +++ b/src/vnet/gso/gso.h @@ -16,10 +16,25 @@ #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; vnet_main_t *vnet_main; u16 msg_id_base; @@ -29,6 +44,86 @@ extern gso_main_t gso_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 */ /* |