stn: remove dependency on tcp and udp headers - vpp

diff options

author	Florin Coras <fcoras@cisco.com>	2020-10-20 13:40:17 -0700
committer	Damjan Marion <dmarion@me.com>	2020-10-21 11:04:47 +0000
commit	5004b0d2f27476eb751cdfe4000236b28cba2064 (patch)
tree	ba7aac8d94aa18bef5e7ae0572917a5566a1b1d8
parent	97f9694ad364a9bb19d9f642ececfd271d1214ec (diff)

stn: remove dependency on tcp and udp headers

Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I8a842759009ec0f433f0aeff47f4e1c889d7b211

Diffstat

-rw-r--r--

src/plugins/stn/stn.c

1 files changed, 18 insertions, 6 deletions

/* * Copyright (c) 2017-2019 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <vlib/vlib.h> #include <vnet/vnet.h> #include <vnet/pg/pg.h> #include <vnet/ip/ip.h> #include <vnet/ethernet/ethernet.h> #include "hicn.h" #include "pg.h" #include "parser.h" #include "infra.h" /* Registration struct for a graph node */ vlib_node_registration_t hicn_pg_interest_node; vlib_node_registration_t hicn_pg_data_node; /* Stats, which end up called "error" even though they aren't... */ #define foreach_hicnpg_error \ _(PROCESSED, "hICN PG packets processed") \ _(DROPPED, "hICN PG packets dropped") \ _(INTEREST_MSGS_GENERATED, "hICN PG Interests generated") \ _(CONTENT_MSGS_RECEIVED, "hICN PG Content msgs received") typedef enum { #define _(sym,str) HICNPG_ERROR_##sym, foreach_hicnpg_error #undef _ HICNPG_N_ERROR, } hicnpg_error_t; static char *hicnpg_error_strings[] = { #define _(sym,string) string, foreach_hicnpg_error #undef _ }; /* * Next graph nodes, which reference the list in the actual registration * block below */ typedef enum { HICNPG_INTEREST_NEXT_V4_LOOKUP, HICNPG_INTEREST_NEXT_V6_LOOKUP, HICNPG_INTEREST_NEXT_IFACE_IP4_INPUT, HICNPG_INTEREST_NEXT_IFACE_IP6_INPUT, HICNPG_INTEREST_NEXT_DROP, HICNPG_N_NEXT, } hicnpg_interest_next_t; /* Trace context struct */ typedef struct { u32 next_index; u32 sw_if_index; u8 pkt_type; u16 msg_type; } hicnpg_trace_t; hicnpg_main_t hicnpg_main = { .index = (u32) 0, .index_ifaces = (u32) 1, .max_seq_number = (u32) ~ 0, .interest_lifetime = 4, .n_flows = (u32) 0, .n_ifaces = (u32) 1, .hicn_underneath = 0 }; hicnpg_server_main_t hicnpg_server_main = { .node_index = 0, .hicn_underneath = 0 }; /* packet trace format function */ static u8 * format_hicnpg_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); hicnpg_trace_t *t = va_arg (*args, hicnpg_trace_t *); s = format (s, "HICNPG: pkt: %d, msg %d, sw_if_index %d, next index %d", (int) t->pkt_type, (int) t->msg_type, t->sw_if_index, t->next_index); return (s); } always_inline void hicn_rewrite_interestv4 (vlib_main_t * vm, vlib_buffer_t * b0, u32 seq_number, u16 lifetime, u32 next_flow, u32 iface); always_inline void hicn_rewrite_interestv6 (vlib_main_t * vm, vlib_buffer_t * b0, u32 seq_number, u16 lifetime, u32 next_flow, u32 iface); always_inline void convert_interest_to_data_v4 (vlib_main_t * vm, vlib_buffer_t * b0, vlib_buffer_t * rb, u32 bi0); always_inline void convert_interest_to_data_v6 (vlib_main_t * vm, vlib_buffer_t * b0, vlib_buffer_t * rb, u32 bi0); always_inline void calculate_tcp_checksum_v4 (vlib_main_t * vm, vlib_buffer_t * b0); always_inline void calculate_tcp_checksum_v6 (vlib_main_t * vm, vlib_buffer_t * b0); /* * Node function for the icn packet-generator client. The goal here is to * manipulate/tweak a stream of packets that have been injected by the vpp * packet generator to generate icn request traffic. */ static uword hicnpg_client_interest_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, *from, *to_next; hicnpg_interest_next_t next_index; u32 pkts_processed = 0, pkts_dropped = 0; u32 interest_msgs_generated = 0; u32 bi0, bi1; vlib_buffer_t *b0, *b1; u8 pkt_type0 = 0, pkt_type1 = 0; u16 msg_type0 = 0, msg_type1 = 0; hicn_header_t *hicn0 = NULL, *hicn1 = NULL; hicn_name_t name0, name1; u16 namelen0, namelen1; hicnpg_main_t *hpgm = &hicnpg_main; int iface = 0; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 4 && n_left_to_next >= 2) { u32 next0 = HICNPG_INTEREST_NEXT_DROP; u32 next1 = HICNPG_INTEREST_NEXT_DROP; u32 sw_if_index0 = ~0, sw_if_index1 = ~0; u8 isv6_0; u8 isv6_1; /* 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), STORE); CLIB_PREFETCH (p3->data, (2 * CLIB_CACHE_LINE_BYTES), STORE); } /* * speculatively enqueue b0 and b1 to the current * next frame */ to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; from += 2; to_next += 2; n_left_from -= 2; n_left_to_next -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; /* Check icn packets, locate names */ if (hicn_interest_parse_pkt (b0, &name0, &namelen0, &hicn0, &isv6_0) == HICN_ERROR_NONE) { /* this node grabs only interests */ /* Increment the appropriate message counter */ interest_msgs_generated++; iface = (hpgm->index_ifaces % hpgm->n_ifaces); /* Rewrite and send */ isv6_0 ? hicn_rewrite_interestv6 (vm, b0, (hpgm->index / hpgm->n_flows) % hpgm->max_seq_number, hpgm->interest_lifetime, hpgm->index % hpgm->n_flows, iface) : hicn_rewrite_interestv4 (vm, b0, (hpgm->index / hpgm->n_flows) % hpgm->max_seq_number, hpgm->interest_lifetime, hpgm->index % hpgm->n_flows, iface); hpgm->index_ifaces++; if (iface == (hpgm->n_ifaces - 1)) hpgm->index++; next0 = isv6_0 ? HICNPG_INTEREST_NEXT_V6_LOOKUP : HICNPG_INTEREST_NEXT_V4_LOOKUP; next0 += 2 * hpgm->hicn_underneath; } if (hicn_interest_parse_pkt (b1, &name1, &namelen1, &hicn1, &isv6_1) == HICN_ERROR_NONE) { /* this node grabs only interests */ /* Increment the appropriate message counter */ interest_msgs_generated++; iface = (hpgm->index_ifaces % hpgm->n_ifaces); /* Rewrite and send */ isv6_1 ? hicn_rewrite_interestv6 (vm, b1, (hpgm->index / hpgm->n_flows) % hpgm->max_seq_number, hpgm->interest_lifetime, hpgm->index % hpgm->n_flows, iface) : hicn_rewrite_interestv4 (vm, b1, (hpgm->index / hpgm->n_flows) % hpgm->max_seq_number, hpgm->interest_lifetime, hpgm->index % hpgm->n_flows, iface); hpgm->index_ifaces++; if (iface == (hpgm->n_ifaces - 1)) hpgm->index++; next1 = isv6_1 ? HICNPG_INTEREST_NEXT_V6_LOOKUP : HICNPG_INTEREST_NEXT_V4_LOOKUP; next1 += 2 * hpgm->hicn_underneath; } /* Send pkt to next node */ vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; vnet_buffer (b1)->sw_if_index[VLIB_TX] = ~0; pkts_processed += 2; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (b0->flags & VLIB_BUFFER_IS_TRACED) { hicnpg_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->pkt_type = pkt_type0; t->msg_type = msg_type0; t->sw_if_index = sw_if_index0; t->next_index = next0; } if (b1->flags & VLIB_BUFFER_IS_TRACED) { hicnpg_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); t->pkt_type = pkt_type1; t->msg_type = msg_type1; t->sw_if_index = sw_if_index1; t->next_index = next1; } } if (next0 == HICNPG_INTEREST_NEXT_DROP) { pkts_dropped++; } if (next1 == HICNPG_INTEREST_NEXT_DROP) { pkts_dropped++; } /* * verify speculative enqueues, maybe switch current * next frame */ 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) { u32 next0 = HICNPG_INTEREST_NEXT_DROP; u32 sw_if_index0; u8 isv6_0; /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; /* Check icn packets, locate names */ if (hicn_interest_parse_pkt (b0, &name0, &namelen0, &hicn0, &isv6_0) == HICN_ERROR_NONE) { /* this node grabs only interests */ /* Increment the appropriate message counter */ interest_msgs_generated++; iface = (hpgm->index_ifaces % hpgm->n_ifaces); /* Rewrite and send */ isv6_0 ? hicn_rewrite_interestv6 (vm, b0, (hpgm->index / hpgm->n_flows) % hpgm->max_seq_number, hpgm->interest_lifetime, hpgm->index % hpgm->n_flows, iface) : hicn_rewrite_interestv4 (vm, b0, (hpgm->index / hpgm->n_flows) % hpgm->max_seq_number, hpgm->interest_lifetime, hpgm->index % hpgm->n_flows, iface); hpgm->index_ifaces++; if (iface == (hpgm->n_ifaces - 1)) hpgm->index++; next0 = isv6_0 ? HICNPG_INTEREST_NEXT_V6_LOOKUP : HICNPG_INTEREST_NEXT_V4_LOOKUP; next0 += 2 * hpgm->hicn_underneath; } /* Send pkt to ip lookup */ vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { hicnpg_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->pkt_type = pkt_type0; t->msg_type = msg_type0; t->sw_if_index = sw_if_index0; t->next_index = next0; } pkts_processed += 1; if (next0 == HICNPG_INTEREST_NEXT_DROP) { pkts_dropped++; } /* * verify speculative enqueue, maybe switch current * next frame */ 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); } vlib_node_increment_counter (vm, hicn_pg_interest_node.index, HICNPG_ERROR_PROCESSED, pkts_processed); vlib_node_increment_counter (vm, hicn_pg_interest_node.index, HICNPG_ERROR_DROPPED, pkts_dropped); vlib_node_increment_counter (vm, hicn_pg_interest_node.index, HICNPG_ERROR_INTEREST_MSGS_GENERATED, interest_msgs_generated); return (frame->n_vectors); } void hicn_rewrite_interestv4 (vlib_main_t * vm, vlib_buffer_t * b0, u32 seq_number, u16 interest_lifetime, u32 next_flow, u32 iface) { hicn_header_t *h0 = vlib_buffer_get_current (b0); /* Generate the right src and dst corresponding to flow and iface */ ip46_address_t src_addr = { .ip4 = hicnpg_main.pgen_clt_src_addr.ip4, }; hicn_name_t dst_name = { .ip4.prefix_as_ip4 = hicnpg_main.pgen_clt_hicn_name.ip4, .ip4.suffix = seq_number, }; src_addr.ip4.as_u32 += clib_host_to_net_u32 (iface); dst_name.ip4.prefix_as_ip4.as_u32 += clib_net_to_host_u32 (next_flow); /* Update locator and name */ hicn_type_t type = hicn_get_buffer (b0)->type; HICN_OPS4->set_interest_locator (type, &h0->protocol, &src_addr); HICN_OPS4->set_interest_name (type, &h0->protocol, &dst_name); /* Update lifetime (currently L4 checksum is not updated) */ HICN_OPS4->set_lifetime (type, &h0->protocol, interest_lifetime); /* Update checksums */ HICN_OPS4->update_checksums (type, &h0->protocol, 0, 0); } /** * @brief Rewrite the IPv6 header as the next generated packet * * Set up a name prefix * - etiher generate interest in which the name varies only after the prefix * (inc : seq_number), then the flow acts on the prefix (CHECK) * seq_number => TCP, FLOW => * * SRC : pgen_clt_src_addr.ip6 DST = generate name (pgen_clt_hicn_name.ip6) * ffff:ffff:ffff:ffff ffff:ffff:ffff:ffff * \__/ \__/ * +iface + flow * Source is used to emulate different consumers. * FIXME iface is ill-named, better name it consumer id * Destination is used to iterate on the content. */ void hicn_rewrite_interestv6 (vlib_main_t * vm, vlib_buffer_t * b0, u32 seq_number, u16 interest_lifetime, u32 next_flow, u32 iface) { hicn_header_t *h0 = vlib_buffer_get_current (b0); /* Generate the right src and dst corresponding to flow and iface */ ip46_address_t src_addr = { .ip6 = hicnpg_main.pgen_clt_src_addr.ip6, }; hicn_name_t dst_name = { .ip6.prefix_as_ip6 = hicnpg_main.pgen_clt_hicn_name.ip6, .ip6.suffix = seq_number, }; src_addr.ip6.as_u32[3] += clib_host_to_net_u32 (iface); dst_name.ip6.prefix_as_ip6.as_u32[3] += clib_net_to_host_u32 (next_flow); /* Update locator and name */ hicn_type_t type = hicn_get_buffer (b0)->type; HICN_OPS6->set_interest_locator (type, &h0->protocol, &src_addr); HICN_OPS6->set_interest_name (type, &h0->protocol, &dst_name); /* Update lifetime */ HICN_OPS6->set_lifetime (type, &h0->protocol, interest_lifetime); /* Update checksums */ calculate_tcp_checksum_v6 (vm, b0); } void calculate_tcp_checksum_v4 (vlib_main_t * vm, vlib_buffer_t * b0) { ip4_header_t *ip0; tcp_header_t *tcp0; ip_csum_t sum0; u32 tcp_len0; ip0 = (ip4_header_t *) (vlib_buffer_get_current (b0)); tcp0 = (tcp_header_t *) (vlib_buffer_get_current (b0) + sizeof (ip4_header_t)); tcp_len0 = clib_net_to_host_u16 (ip0->length) - sizeof (ip4_header_t); /* Initialize checksum with header. */ if (BITS (sum0) == 32) { sum0 = clib_mem_unaligned (&ip0->src_address, u32); sum0 = ip_csum_with_carry (sum0, clib_mem_unaligned (&ip0->dst_address, u32)); } else sum0 = clib_mem_unaligned (&ip0->src_address, u64); sum0 = ip_csum_with_carry (sum0, clib_host_to_net_u32 (tcp_len0 + (ip0->protocol << 16))); /* Invalidate possibly old checksum. */ tcp0->checksum = 0; u32 tcp_offset = sizeof (ip4_header_t); sum0 = ip_incremental_checksum_buffer (vm, b0, tcp_offset, tcp_len0, sum0); tcp0->checksum = ~ip_csum_fold (sum0); } void calculate_tcp_checksum_v6 (vlib_main_t * vm, vlib_buffer_t * b0) { ip6_header_t *ip0; tcp_header_t *tcp0; ip_csum_t sum0; u32 tcp_len0; ip0 = (ip6_header_t *) (vlib_buffer_get_current (b0)); tcp0 = (tcp_header_t *) (vlib_buffer_get_current (b0) + sizeof (ip6_header_t)); tcp_len0 = clib_net_to_host_u16 (ip0->payload_length); /* Initialize checksum with header. */ if (BITS (sum0) == 32) { sum0 = clib_mem_unaligned (&ip0->src_address, u32); sum0 = ip_csum_with_carry (sum0, clib_mem_unaligned (&ip0->dst_address, u32)); } else sum0 = clib_mem_unaligned (&ip0->src_address, u64); sum0 = ip_csum_with_carry (sum0, clib_host_to_net_u32 (tcp_len0 + (ip0->protocol << 16))); /* Invalidate possibly old checksum. */ tcp0->checksum = 0; u32 tcp_offset = sizeof (ip6_header_t); sum0 = ip_incremental_checksum_buffer (vm, b0, tcp_offset, tcp_len0, sum0); tcp0->checksum = ~ip_csum_fold (sum0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE(hicn_pg_interest_node) ={ .function = hicnpg_client_interest_node_fn, .name = "hicnpg-interest", .vector_size = sizeof(u32), .format_trace = format_hicnpg_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(hicnpg_error_strings), .error_strings = hicnpg_error_strings, .n_next_nodes = HICNPG_N_NEXT, .next_nodes = { [HICNPG_INTEREST_NEXT_V4_LOOKUP] = "ip4-lookup", [HICNPG_INTEREST_NEXT_V6_LOOKUP] = "ip6-lookup", [HICNPG_INTEREST_NEXT_IFACE_IP4_INPUT] = "hicn-iface-ip4-input", [HICNPG_INTEREST_NEXT_IFACE_IP6_INPUT] = "hicn-iface-ip6-input", [HICNPG_INTEREST_NEXT_DROP] = "error-drop" }, }; /* *INDENT-ON* */ /* * Next graph nodes, which reference the list in the actual registration * block below */ typedef enum { HICNPG_DATA_NEXT_DROP, HICNPG_DATA_N_NEXT, } hicnpg_data_next_t; /* Trace context struct */ typedef struct { u32 next_index; u32 sw_if_index; u8 pkt_type; u16 msg_type; } icnpg_data_trace_t; /* packet trace format function */ static u8 * format_hicnpg_data_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); hicnpg_trace_t *t = va_arg (*args, hicnpg_trace_t *); s = format (s, "HICNPG: pkt: %d, msg %d, sw_if_index %d, next index %d", (int) t->pkt_type, (int) t->msg_type, t->sw_if_index, t->next_index); return (s); } /* * Node function for the icn packet-generator client. The goal here is to * manipulate/tweak a stream of packets that have been injected by the vpp * packet generator to generate icn request traffic. */ static uword hicnpg_client_data_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, *from, *to_next; hicnpg_data_next_t next_index; u32 pkts_processed = 0; u32 content_msgs_received = 0; u32 bi0, bi1; vlib_buffer_t *b0, *b1; u8 pkt_type0 = 0, pkt_type1 = 0; u16 msg_type0 = 1, msg_type1 = 1; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 4 && n_left_to_next >= 2) { u32 next0 = HICNPG_DATA_NEXT_DROP; u32 next1 = HICNPG_DATA_NEXT_DROP; u32 sw_if_index0, sw_if_index1; /* 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), STORE); CLIB_PREFETCH (p3->data, (2 * CLIB_CACHE_LINE_BYTES), STORE); } /* * speculatively enqueue b0 and b1 to the current * next frame */ to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; from += 2; to_next += 2; n_left_from -= 2; n_left_to_next -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; /* Increment a counter */ content_msgs_received += 2; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (b0->flags & VLIB_BUFFER_IS_TRACED) { icnpg_data_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->pkt_type = pkt_type0; t->msg_type = msg_type0; t->sw_if_index = sw_if_index0; t->next_index = next0; } if (b1->flags & VLIB_BUFFER_IS_TRACED) { icnpg_data_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); t->pkt_type = pkt_type1; t->msg_type = msg_type1; t->sw_if_index = sw_if_index1; t->next_index = next1; } } pkts_processed += 2; } while (n_left_from > 0 && n_left_to_next > 0) { u32 next0 = HICNPG_DATA_NEXT_DROP; u32 sw_if_index0; /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; /* Increment a counter */ content_msgs_received++; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { icnpg_data_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->pkt_type = pkt_type0; t->msg_type = msg_type0; t->sw_if_index = sw_if_index0; t->next_index = next0; } pkts_processed++; } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } vlib_node_increment_counter (vm, hicn_pg_data_node.index, HICNPG_ERROR_PROCESSED, pkts_processed); vlib_node_increment_counter (vm, hicn_pg_data_node.index, HICNPG_ERROR_CONTENT_MSGS_RECEIVED, content_msgs_received); return (frame->n_vectors); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE(hicn_pg_data_node) = { .function = hicnpg_client_data_node_fn, .name = "hicnpg-data", .vector_size = sizeof(u32), .format_trace = format_hicnpg_data_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(hicnpg_error_strings), .error_strings = hicnpg_error_strings, .n_next_nodes = HICNPG_DATA_N_NEXT, .next_nodes = { [HICNPG_DATA_NEXT_DROP] = "error-drop" }, }; /* *INDENT-ON* */ /* * End of packet-generator client node */ /* * Beginning of packet-generation server node */ /* Registration struct for a graph node */ vlib_node_registration_t hicn_pg_server_node; /* Stats, which end up called "error" even though they aren't... */ #define foreach_icnpg_server_error \ _(PROCESSED, "hICN PG Server packets processed") \ _(DROPPED, "hICN PG Server packets dropped") typedef enum { #define _(sym,str) HICNPG_SERVER_ERROR_##sym, foreach_icnpg_server_error #undef _ HICNPG_SERVER_N_ERROR, } icnpg_server_error_t; static char *icnpg_server_error_strings[] = { #define _(sym,string) string, foreach_icnpg_server_error #undef _ }; /* * Next graph nodes, which reference the list in the actual registration * block below */ typedef enum { HICNPG_SERVER_NEXT_V4_LOOKUP, HICNPG_SERVER_NEXT_V6_LOOKUP, HICNPG_SERVER_NEXT_FACE_IP4_INPUT, HICNPG_SERVER_NEXT_FACE_IP6_INPUT, HICNPG_SERVER_NEXT_DROP, HICNPG_SERVER_N_NEXT, } icnpg_server_next_t; /* Trace context struct */ typedef struct { u32 next_index; u32 sw_if_index; u8 pkt_type; u16 msg_type; } hicnpg_server_trace_t; /* packet trace format function */ static u8 * format_icnpg_server_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); hicnpg_server_trace_t *t = va_arg (*args, hicnpg_server_trace_t *); s = format (s, "HICNPG SERVER: pkt: %d, msg %d, sw_if_index %d, next index %d", (int) t->pkt_type, (int) t->msg_type, t->sw_if_index, t->next_index); return (s); } /* * Node function for the icn packet-generator server. */ static uword hicnpg_node_server_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, *from, *to_next; icnpg_server_next_t next_index; u32 pkts_processed = 0, pkts_dropped = 0; u32 bi0, bi1; vlib_buffer_t *b0, *b1; u8 pkt_type0 = 0, pkt_type1 = 0; u16 msg_type0 = 0, msg_type1 = 0; hicn_header_t *hicn0 = NULL, *hicn1 = NULL; hicn_name_t name0, name1; u16 namelen0, namelen1; hicnpg_server_main_t *hpgsm = &hicnpg_server_main; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 4 && n_left_to_next >= 2) { u32 next0 = HICNPG_SERVER_NEXT_DROP; u32 next1 = HICNPG_SERVER_NEXT_DROP; u8 isv6_0 = 0; u8 isv6_1 = 0; u32 sw_if_index0, sw_if_index1; /* 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), STORE); CLIB_PREFETCH (p3->data, (2 * CLIB_CACHE_LINE_BYTES), STORE); } /* * speculatively enqueue b0 and b1 to the current * next frame */ to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; from += 2; to_next += 2; n_left_from -= 2; n_left_to_next -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; if (hicn_interest_parse_pkt (b0, &name0, &namelen0, &hicn0, &isv6_0) == HICN_ERROR_NONE) { /* this node grabs only interests */ vlib_buffer_t *rb = NULL; rb = vlib_get_buffer (vm, hpgsm->pgen_svr_buffer_idx); isv6_0 ? convert_interest_to_data_v6 (vm, b0, rb, bi0) : convert_interest_to_data_v4 (vm, b0, rb, bi0); next0 = isv6_0 ? HICNPG_SERVER_NEXT_V6_LOOKUP : HICNPG_SERVER_NEXT_V4_LOOKUP; /* if hicn_underneath ,the following will results as next0 = HICNPG_SERVER_NEXT_DATA_LOOKUP */ next0 += 2 * hpgsm->hicn_underneath; } if (hicn_interest_parse_pkt (b1, &name1, &namelen1, &hicn1, &isv6_1) == HICN_ERROR_NONE) { /* this node grabs only interests */ vlib_buffer_t *rb = NULL; rb = vlib_get_buffer (vm, hpgsm->pgen_svr_buffer_idx); isv6_1 ? convert_interest_to_data_v6 (vm, b1, rb, bi1) : convert_interest_to_data_v4 (vm, b1, rb, bi1); next1 = isv6_1 ? HICNPG_SERVER_NEXT_V6_LOOKUP : HICNPG_SERVER_NEXT_V4_LOOKUP; /* if hicn_underneath ,the following will results as next0 = HICNPG_SERVER_NEXT_DATA_LOOKUP */ next1 += 2 * hpgsm->hicn_underneath; } pkts_processed += 2; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (b0->flags & VLIB_BUFFER_IS_TRACED) { hicnpg_server_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->pkt_type = pkt_type0; t->msg_type = msg_type0; t->sw_if_index = sw_if_index0; t->next_index = next0; } if (b1->flags & VLIB_BUFFER_IS_TRACED) { hicnpg_server_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); t->pkt_type = pkt_type1; t->msg_type = msg_type1; t->sw_if_index = sw_if_index1; t->next_index = next1; } } if (next0 == HICNPG_SERVER_NEXT_DROP) { pkts_dropped++; } if (next1 == HICNPG_SERVER_NEXT_DROP) { pkts_dropped++; } /* * verify speculative enqueues, maybe switch current * next frame */ 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) { u32 next0 = HICNPG_SERVER_NEXT_DROP; u32 sw_if_index0 = ~0; u8 isv6_0 = 0; /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; if (hicn_interest_parse_pkt (b0, &name0, &namelen0, &hicn0, &isv6_0) == HICN_ERROR_NONE) { /* this node grabs only interests */ vlib_buffer_t *rb = NULL; rb = vlib_get_buffer (vm, hpgsm->pgen_svr_buffer_idx); isv6_0 ? convert_interest_to_data_v6 (vm, b0, rb, bi0) : convert_interest_to_data_v4 (vm, b0, rb, bi0); next0 = isv6_0 ? HICNPG_SERVER_NEXT_V6_LOOKUP : HICNPG_SERVER_NEXT_V4_LOOKUP; /* if hicn_underneath ,the following will results as next0 = HICNPG_SERVER_NEXT_DATA_LOOKUP */ next0 += 2 * hpgsm->hicn_underneath; } if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { hicnpg_server_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->pkt_type = pkt_type0; t->msg_type = msg_type0; t->sw_if_index = sw_if_index0; t->next_index = next0; } pkts_processed += 1; if (next0 == HICNPG_SERVER_NEXT_DROP) { pkts_dropped++; } /* * verify speculative enqueue, maybe switch current * next frame */ 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); } vlib_node_increment_counter (vm, hicn_pg_server_node.index, HICNPG_SERVER_ERROR_PROCESSED, pkts_processed); vlib_node_increment_counter (vm, hicn_pg_server_node.index, HICNPG_SERVER_ERROR_DROPPED, pkts_dropped); return (frame->n_vectors); } void convert_interest_to_data_v4 (vlib_main_t * vm, vlib_buffer_t * b0, vlib_buffer_t * rb, u32 bi0) { hicn_header_t *h0 = vlib_buffer_get_current (b0); /* Get the packet length */ u16 pkt_len = clib_net_to_host_u16 (h0->v4.ip.len); /* * Rule of thumb: We want the size of the IP packet to be <= 1500 bytes */ u16 bytes_to_copy = rb->current_length; if ((bytes_to_copy + pkt_len) > 1500) { bytes_to_copy = 1500 - pkt_len; } /* Add content to the data packet */ vlib_buffer_add_data (vm, &bi0, rb->data, bytes_to_copy); b0 = vlib_get_buffer (vm, bi0); h0 = vlib_buffer_get_current (b0); ip4_address_t src_addr = h0->v4.ip.saddr; h0->v4.ip.saddr = h0->v4.ip.daddr; h0->v4.ip.daddr = src_addr; h0->v4.ip.len = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); h0->v4.ip.csum = ip4_header_checksum ((ip4_header_t *) & (h0->v4.ip)); calculate_tcp_checksum_v4 (vm, b0); } void convert_interest_to_data_v6 (vlib_main_t * vm, vlib_buffer_t * b0, vlib_buffer_t * rb, u32 bi0) { hicn_header_t *h0 = vlib_buffer_get_current (b0); /* Get the packet length */ uint16_t pkt_len = clib_net_to_host_u16 (h0->v6.ip.len) + sizeof (ip6_header_t); /* * Figure out how many bytes we can add to the content * * Rule of thumb: We want the size of the IP packet to be <= 1400 bytes */ u16 bytes_to_copy = rb->current_length; if ((bytes_to_copy + pkt_len) > 1500) { bytes_to_copy = 1500 - pkt_len; } /* Add content to the data packet */ vlib_buffer_add_data (vm, &bi0, rb->data, bytes_to_copy); b0 = vlib_get_buffer (vm, bi0); h0 = vlib_buffer_get_current (b0); ip6_address_t src_addr = h0->v6.ip.saddr; h0->v6.ip.saddr = h0->v6.ip.daddr; h0->v6.ip.daddr = src_addr; h0->v6.ip.len = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) - sizeof (ip6_header_t)); h0->v6.tcp.data_offset_and_reserved |= 0x0f; h0->v6.tcp.urg_ptr = htons (0xffff); calculate_tcp_checksum_v6 (vm, b0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE(hicn_pg_server_node) = { .function = hicnpg_node_server_fn, .name = "hicnpg-server", .vector_size = sizeof(u32), .format_trace = format_icnpg_server_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(icnpg_server_error_strings), .error_strings = icnpg_server_error_strings, .n_next_nodes = HICNPG_SERVER_N_NEXT, /* edit / add dispositions here */ .next_nodes = { [HICNPG_SERVER_NEXT_V4_LOOKUP] = "ip4-lookup", [HICNPG_SERVER_NEXT_V6_LOOKUP] = "ip6-lookup", [HICNPG_SERVER_NEXT_FACE_IP4_INPUT] = "hicn-face-ip4-input", [HICNPG_SERVER_NEXT_FACE_IP6_INPUT] = "hicn-face-ip6-input", [HICNPG_SERVER_NEXT_DROP] = "error-drop", }, }; /* *INDENT-ON* */ /* * End of packet-generator server node */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: eval: (c-set-style "gnu") End: */


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