From 92b0275a364022af6ab828dfac83e38c0117cfe6 Mon Sep 17 00:00:00 2001 From: Jakub Grajciar Date: Fri, 20 Oct 2017 13:37:28 +0200 Subject: af_packet: invalid TCP/UDP offload checksum on RX node recalculation Change-Id: I1075e5d2a1b6dfe3a443b40b41b8458a30505680 Signed-off-by: Jakub Grajciar Signed-off-by: Jakub.Grajciar@pantheon.tech --- src/vnet/devices/af_packet/node.c | 68 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) (limited to 'src/vnet/devices/af_packet/node.c') diff --git a/src/vnet/devices/af_packet/node.c b/src/vnet/devices/af_packet/node.c index 8539ff56b5c..b627cfcb036 100644 --- a/src/vnet/devices/af_packet/node.c +++ b/src/vnet/devices/af_packet/node.c @@ -25,6 +25,7 @@ #include #include #include +#include #include @@ -106,6 +107,71 @@ buffer_add_to_chain (vlib_main_t * vm, u32 bi, u32 first_bi, u32 prev_bi) b->next_buffer = 0; } +static_always_inline void +mark_tcp_udp_cksum_calc (vlib_buffer_t * b) +{ + ethernet_header_t *eth = vlib_buffer_get_current (b); + if (clib_net_to_host_u16 (eth->type) == ETHERNET_TYPE_IP4) + { + ip4_header_t *ip4 = + (vlib_buffer_get_current (b) + sizeof (ethernet_header_t)); + b->flags |= VNET_BUFFER_F_IS_IP4; + if (ip4->protocol == IP_PROTOCOL_TCP) + { + b->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM; + ((tcp_header_t + *) (vlib_buffer_get_current (b) + + sizeof (ethernet_header_t) + + ip4_header_bytes (ip4)))->checksum = 0; + } + else if (ip4->protocol == IP_PROTOCOL_UDP) + { + b->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM; + ((udp_header_t + *) (vlib_buffer_get_current (b) + + sizeof (ethernet_header_t) + + ip4_header_bytes (ip4)))->checksum = 0; + } + vnet_buffer (b)->l3_hdr_offset = sizeof (ethernet_header_t); + vnet_buffer (b)->l4_hdr_offset = + sizeof (ethernet_header_t) + ip4_header_bytes (ip4); + } + else if (clib_net_to_host_u16 (eth->type) == ETHERNET_TYPE_IP6) + { + ip6_header_t *ip6 = + (vlib_buffer_get_current (b) + sizeof (ethernet_header_t)); + b->flags |= VNET_BUFFER_F_IS_IP6; + u16 ip6_hdr_len = sizeof (ip6_header_t); + if (ip6_ext_hdr (ip6->protocol)) + { + ip6_ext_header_t *p = (void *) (ip6 + 1); + ip6_hdr_len += ip6_ext_header_len (p); + while (ip6_ext_hdr (p->next_hdr)) + { + ip6_hdr_len += ip6_ext_header_len (p); + p = ip6_ext_next_header (p); + } + } + if (ip6->protocol == IP_PROTOCOL_TCP) + { + b->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM; + ((tcp_header_t + *) (vlib_buffer_get_current (b) + + sizeof (ethernet_header_t) + ip6_hdr_len))->checksum = 0; + } + else if (ip6->protocol == IP_PROTOCOL_UDP) + { + b->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM; + ((udp_header_t + *) (vlib_buffer_get_current (b) + + sizeof (ethernet_header_t) + ip6_hdr_len))->checksum = 0; + } + vnet_buffer (b)->l3_hdr_offset = sizeof (ethernet_header_t); + vnet_buffer (b)->l4_hdr_offset = + sizeof (ethernet_header_t) + ip6_hdr_len; + } +} + always_inline uword af_packet_device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, af_packet_if_t * apif) @@ -211,6 +277,8 @@ af_packet_device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; first_bi0 = bi0; first_b0 = vlib_get_buffer (vm, first_bi0); + if (tph->tp_status & TP_STATUS_CSUMNOTREADY) + mark_tcp_udp_cksum_calc (first_b0); } else buffer_add_to_chain (vm, bi0, first_bi0, prev_bi0); -- cgit 1.2.3-korg