diff options
Diffstat (limited to 'src/vnet/vxlan-gpe/decap.c')
| -rw-r--r-- | src/vnet/vxlan-gpe/decap.c | 479 |
1 files changed, 462 insertions, 17 deletions
diff --git a/src/vnet/vxlan-gpe/decap.c b/src/vnet/vxlan-gpe/decap.c index d4fe423126e..075b0f51c99 100644 --- a/src/vnet/vxlan-gpe/decap.c +++ b/src/vnet/vxlan-gpe/decap.c @@ -108,8 +108,8 @@ vxlan_gpe_input (vlib_main_t * vm, u8 is_ip4) { u32 n_left_from, next_index, *from, *to_next; - vxlan_gpe_main_t * ngm = &vxlan_gpe_main; - vnet_main_t * vnm = ngm->vnet_main; + vxlan_gpe_main_t * nngm = &vxlan_gpe_main; + vnet_main_t * vnm = nngm->vnet_main; vnet_interface_main_t * im = &vnm->interface_main; u32 last_tunnel_index = ~0; vxlan4_gpe_tunnel_key_t last_key4; @@ -213,11 +213,11 @@ vxlan_gpe_input (vlib_main_t * vm, { next0 = (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? - ngm->decap_next_node_list[iuvn4_0->vxlan.protocol]: \ + nngm->decap_next_node_list[iuvn4_0->vxlan.protocol]: \ VXLAN_GPE_INPUT_NEXT_DROP; next1 = (iuvn4_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? - ngm->decap_next_node_list[iuvn4_1->vxlan.protocol]: \ + nngm->decap_next_node_list[iuvn4_1->vxlan.protocol]: \ VXLAN_GPE_INPUT_NEXT_DROP; key4_0.local = iuvn4_0->ip4.dst_address.as_u32; @@ -260,7 +260,7 @@ vxlan_gpe_input (vlib_main_t * vm, if (PREDICT_FALSE((key4_0.as_u64[0] != last_key4.as_u64[0]) || (key4_0.as_u64[1] != last_key4.as_u64[1]))) { - p0 = hash_get_mem(ngm->vxlan4_gpe_tunnel_by_key, &key4_0); + p0 = hash_get_mem(nngm->vxlan4_gpe_tunnel_by_key, &key4_0); if (p0 == 0) { @@ -279,11 +279,11 @@ vxlan_gpe_input (vlib_main_t * vm, { next0 = (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? - ngm->decap_next_node_list[iuvn6_0->vxlan.protocol]: \ + nngm->decap_next_node_list[iuvn6_0->vxlan.protocol]: \ VXLAN_GPE_INPUT_NEXT_DROP; next1 = (iuvn6_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? - ngm->decap_next_node_list[iuvn6_1->vxlan.protocol]: \ + nngm->decap_next_node_list[iuvn6_1->vxlan.protocol]: \ VXLAN_GPE_INPUT_NEXT_DROP; key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0]; @@ -302,7 +302,7 @@ vxlan_gpe_input (vlib_main_t * vm, /* Processing for key6_0 */ if (PREDICT_FALSE(memcmp (&key6_0, &last_key6, sizeof(last_key6)) != 0)) { - p0 = hash_get_mem(ngm->vxlan6_gpe_tunnel_by_key, &key6_0); + p0 = hash_get_mem(nngm->vxlan6_gpe_tunnel_by_key, &key6_0); if (p0 == 0) { @@ -317,7 +317,7 @@ vxlan_gpe_input (vlib_main_t * vm, tunnel_index0 = last_tunnel_index; } - t0 = pool_elt_at_index(ngm->tunnels, tunnel_index0); + t0 = pool_elt_at_index(nngm->tunnels, tunnel_index0); sw_if_index0 = t0->sw_if_index; @@ -366,7 +366,7 @@ vxlan_gpe_input (vlib_main_t * vm, (key4_1.as_u64[0] != last_key4.as_u64[0]) || (key4_1.as_u64[1] != last_key4.as_u64[1]))) { - p1 = hash_get_mem(ngm->vxlan4_gpe_tunnel_by_key, &key4_1); + p1 = hash_get_mem(nngm->vxlan4_gpe_tunnel_by_key, &key4_1); if (p1 == 0) { @@ -386,7 +386,7 @@ vxlan_gpe_input (vlib_main_t * vm, /* Processing for key6_1 */ if (PREDICT_FALSE(memcmp (&key6_1, &last_key6, sizeof(last_key6)) != 0)) { - p1 = hash_get_mem(ngm->vxlan6_gpe_tunnel_by_key, &key6_1); + p1 = hash_get_mem(nngm->vxlan6_gpe_tunnel_by_key, &key6_1); if (p1 == 0) { @@ -401,7 +401,7 @@ vxlan_gpe_input (vlib_main_t * vm, tunnel_index1 = last_tunnel_index; } - t1 = pool_elt_at_index(ngm->tunnels, tunnel_index1); + t1 = pool_elt_at_index(nngm->tunnels, tunnel_index1); sw_if_index1 = t1->sw_if_index; len1 = vlib_buffer_length_in_chain (vm, b1); @@ -502,7 +502,7 @@ vxlan_gpe_input (vlib_main_t * vm, { next0 = (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? - ngm->decap_next_node_list[iuvn4_0->vxlan.protocol]: \ + nngm->decap_next_node_list[iuvn4_0->vxlan.protocol]: \ VXLAN_GPE_INPUT_NEXT_DROP; key4_0.local = iuvn4_0->ip4.dst_address.as_u32; @@ -515,7 +515,7 @@ vxlan_gpe_input (vlib_main_t * vm, (key4_0.as_u64[0] != last_key4.as_u64[0]) || (key4_0.as_u64[1] != last_key4.as_u64[1]))) { - p0 = hash_get_mem(ngm->vxlan4_gpe_tunnel_by_key, &key4_0); + p0 = hash_get_mem(nngm->vxlan4_gpe_tunnel_by_key, &key4_0); if (p0 == 0) { @@ -534,7 +534,7 @@ vxlan_gpe_input (vlib_main_t * vm, { next0 = (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? - ngm->decap_next_node_list[iuvn6_0->vxlan.protocol]: \ + nngm->decap_next_node_list[iuvn6_0->vxlan.protocol]: \ VXLAN_GPE_INPUT_NEXT_DROP; key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0]; @@ -546,7 +546,7 @@ vxlan_gpe_input (vlib_main_t * vm, /* Processing for key6_0 */ if (PREDICT_FALSE(memcmp (&key6_0, &last_key6, sizeof(last_key6)) != 0)) { - p0 = hash_get_mem(ngm->vxlan6_gpe_tunnel_by_key, &key6_0); + p0 = hash_get_mem(nngm->vxlan6_gpe_tunnel_by_key, &key6_0); if (p0 == 0) { @@ -561,7 +561,7 @@ vxlan_gpe_input (vlib_main_t * vm, tunnel_index0 = last_tunnel_index; } - t0 = pool_elt_at_index(ngm->tunnels, tunnel_index0); + t0 = pool_elt_at_index(nngm->tunnels, tunnel_index0); sw_if_index0 = t0->sw_if_index; @@ -731,3 +731,448 @@ VLIB_REGISTER_NODE (vxlan6_gpe_input_node) = { }; VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_gpe_input_node, vxlan6_gpe_input); +typedef enum { + IP_VXLAN_BYPASS_NEXT_DROP, + IP_VXLAN_BYPASS_NEXT_VXLAN, + IP_VXLAN_BYPASS_N_NEXT, +} ip_vxan_bypass_next_t; + +always_inline uword +ip_vxlan_gpe_bypass_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + u32 is_ip4) +{ + vxlan_gpe_main_t * ngm = &vxlan_gpe_main; + u32 * from, * to_next, n_left_from, n_left_to_next, next_index; + vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip4_input_node.index); + ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */ + ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */ + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + if (node->flags & VLIB_NODE_FLAG_TRACE) + ip4_forward_next_trace (vm, node, frame, VLIB_TX); + + if (is_ip4) addr4.data_u32 = ~0; + else ip6_address_set_zero (&addr6); + + while (n_left_from > 0) + { + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from >= 4 && n_left_to_next >= 2) + { + vlib_buffer_t * b0, * b1; + ip4_header_t * ip40, * ip41; + ip6_header_t * ip60, * ip61; + udp_header_t * udp0, * udp1; + u32 bi0, ip_len0, udp_len0, flags0, next0; + u32 bi1, ip_len1, udp_len1, flags1, next1; + i32 len_diff0, len_diff1; + u8 error0, good_udp0, proto0; + u8 error1, good_udp1, proto1; + + /* Prefetch next iteration. */ + { + vlib_buffer_t * p2, * p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); + } + + bi0 = to_next[0] = from[0]; + bi1 = to_next[1] = from[1]; + from += 2; + n_left_from -= 2; + to_next += 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + if (is_ip4) + { + ip40 = vlib_buffer_get_current (b0); + ip41 = vlib_buffer_get_current (b1); + } + else + { + ip60 = vlib_buffer_get_current (b0); + ip61 = vlib_buffer_get_current (b1); + } + + /* Setup packet for next IP feature */ + vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0); + vnet_feature_next(vnet_buffer(b1)->sw_if_index[VLIB_RX], &next1, b1); + + if (is_ip4) + { + proto0 = ip40->protocol; + proto1 = ip41->protocol; + } + else + { + proto0 = ip60->protocol; + proto1 = ip61->protocol; + } + + /* Process packet 0 */ + if (proto0 != IP_PROTOCOL_UDP) + goto exit0; /* not UDP packet */ + + if (is_ip4) + udp0 = ip4_next_header (ip40); + else + udp0 = ip6_next_header (ip60); + + if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE)) + goto exit0; /* not VXLAN packet */ + + /* Validate DIP against VTEPs*/ + if (is_ip4) + { + if (addr4.as_u32 != ip40->dst_address.as_u32) + { + if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32)) + goto exit0; /* no local VTEP for VXLAN packet */ + addr4 = ip40->dst_address; + } + } + else + { + if (!ip6_address_is_equal (&addr6, &ip60->dst_address)) + { + if (!hash_get_mem (ngm->vtep6, &ip60->dst_address)) + goto exit0; /* no local VTEP for VXLAN packet */ + addr6 = ip60->dst_address; + } + } + + flags0 = b0->flags; + good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len0 = clib_net_to_host_u16 (ip40->length); + else + ip_len0 = clib_net_to_host_u16 (ip60->payload_length); + udp_len0 = clib_net_to_host_u16 (udp0->length); + len_diff0 = ip_len0 - udp_len0; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp0)) + { + if ((flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED) == 0) + { + if (is_ip4) + flags0 = ip4_tcp_udp_validate_checksum (vm, b0); + else + flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0); + good_udp0 = + (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + } + } + + if (is_ip4) + { + error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; + } + else + { + error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH; + } + + next0 = error0 ? + IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN; + b0->error = error0 ? error_node->errors[error0] : 0; + + /* vxlan_gpe-input node expect current at VXLAN header */ + if (is_ip4) + vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t)); + else + vlib_buffer_advance (b0, sizeof(ip6_header_t)+sizeof(udp_header_t)); + + exit0: + /* Process packet 1 */ + if (proto1 != IP_PROTOCOL_UDP) + goto exit1; /* not UDP packet */ + + if (is_ip4) + udp1 = ip4_next_header (ip41); + else + udp1 = ip6_next_header (ip61); + + if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE)) + goto exit1; /* not VXLAN packet */ + + /* Validate DIP against VTEPs*/ + if (is_ip4) + { + if (addr4.as_u32 != ip41->dst_address.as_u32) + { + if (!hash_get (ngm->vtep4, ip41->dst_address.as_u32)) + goto exit1; /* no local VTEP for VXLAN packet */ + addr4 = ip41->dst_address; + } + } + else + { + if (!ip6_address_is_equal (&addr6, &ip61->dst_address)) + { + if (!hash_get_mem (ngm->vtep6, &ip61->dst_address)) + goto exit1; /* no local VTEP for VXLAN packet */ + addr6 = ip61->dst_address; + } + } + + flags1 = b1->flags; + good_udp1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp1 |= udp1->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len1 = clib_net_to_host_u16 (ip41->length); + else + ip_len1 = clib_net_to_host_u16 (ip61->payload_length); + udp_len1 = clib_net_to_host_u16 (udp1->length); + len_diff1 = ip_len1 - udp_len1; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp1)) + { + if ((flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED) == 0) + { + if (is_ip4) + flags1 = ip4_tcp_udp_validate_checksum (vm, b1); + else + flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1); + good_udp1 = + (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + } + } + + if (is_ip4) + { + error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH; + } + else + { + error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM; + error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH; + } + + next1 = error1 ? + IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN; + b1->error = error1 ? error_node->errors[error1] : 0; + + /* vxlan_gpe-input node expect current at VXLAN header */ + if (is_ip4) + vlib_buffer_advance (b1, sizeof(ip4_header_t)+sizeof(udp_header_t)); + else + vlib_buffer_advance (b1, sizeof(ip6_header_t)+sizeof(udp_header_t)); + + exit1: + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + vlib_buffer_t * b0; + ip4_header_t * ip40; + ip6_header_t * ip60; + udp_header_t * udp0; + u32 bi0, ip_len0, udp_len0, flags0, next0; + i32 len_diff0; + u8 error0, good_udp0, proto0; + + bi0 = to_next[0] = from[0]; + from += 1; + n_left_from -= 1; + to_next += 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + if (is_ip4) + ip40 = vlib_buffer_get_current (b0); + else + ip60 = vlib_buffer_get_current (b0); + + /* Setup packet for next IP feature */ + vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0); + + if (is_ip4) + proto0 = ip40->protocol; + else + proto0 = ip60->protocol; + + if (proto0 != IP_PROTOCOL_UDP) + goto exit; /* not UDP packet */ + + if (is_ip4) + udp0 = ip4_next_header (ip40); + else + udp0 = ip6_next_header (ip60); + + if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE)) + goto exit; /* not VXLAN packet */ + + /* Validate DIP against VTEPs*/ + if (is_ip4) + { + if (addr4.as_u32 != ip40->dst_address.as_u32) + { + if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32)) + goto exit; /* no local VTEP for VXLAN packet */ + addr4 = ip40->dst_address; + } + } + else + { + if (!ip6_address_is_equal (&addr6, &ip60->dst_address)) + { + if (!hash_get_mem (ngm->vtep6, &ip60->dst_address)) + goto exit; /* no local VTEP for VXLAN packet */ + addr6 = ip60->dst_address; + } + } + + flags0 = b0->flags; + good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len0 = clib_net_to_host_u16 (ip40->length); + else + ip_len0 = clib_net_to_host_u16 (ip60->payload_length); + udp_len0 = clib_net_to_host_u16 (udp0->length); + len_diff0 = ip_len0 - udp_len0; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp0)) + { + if ((flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED) == 0) + { + if (is_ip4) + flags0 = ip4_tcp_udp_validate_checksum (vm, b0); + else + flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0); + good_udp0 = + (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + } + } + + if (is_ip4) + { + error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; + } + else + { + error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH; + } + + next0 = error0 ? + IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN; + b0->error = error0 ? error_node->errors[error0] : 0; + + /* vxlan_gpe-input node expect current at VXLAN header */ + if (is_ip4) + vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t)); + else + vlib_buffer_advance (b0, sizeof(ip6_header_t)+sizeof(udp_header_t)); + + exit: + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + return frame->n_vectors; +} + +static uword +ip4_vxlan_gpe_bypass (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 1); +} + +VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) = { + .function = ip4_vxlan_gpe_bypass, + .name = "ip4-vxlan-gpe-bypass", + .vector_size = sizeof (u32), + + .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT, + .next_nodes = { + [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop", + [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-gpe-input", + }, + + .format_buffer = format_ip4_header, + .format_trace = format_ip4_forward_next_trace, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_gpe_bypass_node,ip4_vxlan_gpe_bypass) + +/* Dummy init function to get us linked in. */ +clib_error_t * ip4_vxlan_gpe_bypass_init (vlib_main_t * vm) +{ return 0; } + +VLIB_INIT_FUNCTION (ip4_vxlan_gpe_bypass_init); + +static uword +ip6_vxlan_gpe_bypass (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 0); +} + +VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) = { + .function = ip6_vxlan_gpe_bypass, + .name = "ip6-vxlan-gpe-bypass", + .vector_size = sizeof (u32), + + .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT, + .next_nodes = { + [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop", + [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan6-gpe-input", + }, + + .format_buffer = format_ip6_header, + .format_trace = format_ip6_forward_next_trace, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (ip6_vxlan_gpe_bypass_node,ip6_vxlan_gpe_bypass) + +/* Dummy init function to get us linked in. */ +clib_error_t * ip6_vxlan_gpe_bypass_init (vlib_main_t * vm) +{ return 0; } + +VLIB_INIT_FUNCTION (ip6_vxlan_gpe_bypass_init); |