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Diffstat (limited to 'hicn-plugin/src/pg.c')
| -rw-r--r-- | hicn-plugin/src/pg.c | 1326 |
1 files changed, 1326 insertions, 0 deletions
diff --git a/hicn-plugin/src/pg.c b/hicn-plugin/src/pg.c new file mode 100644 index 000000000..9938e85ba --- /dev/null +++ b/hicn-plugin/src/pg.c @@ -0,0 +1,1326 @@ +/* + * 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_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, + .sw_if = (u32) 0 +}; + +hicnpg_server_main_t hicnpg_server_main = { + .node_index = 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]; + vnet_buffer (b0)->sw_if_index[VLIB_RX] = hpgm->sw_if; + vnet_buffer (b1)->sw_if_index[VLIB_RX] = hpgm->sw_if; + + /* 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; + } + 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; + } + /* 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]; + vnet_buffer (b0)->sw_if_index[VLIB_RX] = hpgm->sw_if; + + /* 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; + } + /* 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->fp_addr.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->fp_addr.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_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_NEXT_LOOKUP4, + HICNPG_DATA_NEXT_LOOKUP6, + 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); +} + + +static_always_inline int +match_ip4_name (u32 * name, fib_prefix_t * prefix) +{ + u32 xor = 0; + + xor = *name & prefix->fp_addr.ip4.data_u32; + + return xor == prefix->fp_addr.ip4.data_u32; +} + +static_always_inline int +match_ip6_name (u8 * name, fib_prefix_t * prefix) +{ + union + { + u32x4 as_u32x4; + u64 as_u64[2]; + u32 as_u32[4]; + } xor_sum __attribute__ ((aligned (sizeof (u32x4)))); + + xor_sum.as_u64[0] = ((u64 *) name)[0] & prefix->fp_addr.ip6.as_u64[0]; + xor_sum.as_u64[1] = ((u64 *) name)[1] & prefix->fp_addr.ip6.as_u64[1]; + + return (xor_sum.as_u64[0] == prefix->fp_addr.ip6.as_u64[0]) && + (xor_sum.as_u64[1] == prefix->fp_addr.ip6.as_u64[1]); +} + + +/* + * Return 0,1,2. + * 0 matches + * 1 does not match and the prefix is ip4 + * 2 does not match and the prefix is ip6 + */ +static_always_inline u32 +match_data (vlib_buffer_t * b, fib_prefix_t * prefix) +{ + u8 *ptr = vlib_buffer_get_current (b); + u8 v = *ptr & 0xf0; + u32 next = 0; + + if (PREDICT_TRUE (v == 0x40 && ip46_address_is_ip4 (&prefix->fp_addr))) + { + if (!match_ip4_name ((u32 *) & (ptr[12]), prefix)) + next = 1; + } + else + if (PREDICT_TRUE (v == 0x60 && !ip46_address_is_ip4 (&prefix->fp_addr))) + { + if (!match_ip6_name (&(ptr[8]), prefix)) + next = 2; + } + + return next; +} + +/* + * Return 0,1,2. + * 0 matches + * 1 does not match and the prefix is ip4 + * 2 does not match and the prefix is ip6 + */ +static_always_inline u32 +match_interest (vlib_buffer_t * b, fib_prefix_t * prefix) +{ + u8 *ptr = vlib_buffer_get_current (b); + u8 v = *ptr & 0xf0; + u32 next = 0; + + if (PREDICT_TRUE (v == 0x40 && ip46_address_is_ip4 (&prefix->fp_addr))) + { + if (!match_ip4_name ((u32 *) & (ptr[16]), prefix)) + next = 1; + } + else + if (PREDICT_TRUE (v == 0x60 && !ip46_address_is_ip4 (&prefix->fp_addr))) + { + if (!match_ip6_name (&(ptr[24]), prefix)) + next = 2; + } + + return next; +} + + + + +/* + * 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; + hicnpg_main_t *hpgm = &hicnpg_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_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]; + + next0 = + HICNPG_DATA_NEXT_DROP + match_data (b0, hpgm->pgen_clt_hicn_name); + next1 = + HICNPG_DATA_NEXT_DROP + match_data (b1, hpgm->pgen_clt_hicn_name); + + if (PREDICT_FALSE (vnet_get_feature_count + (vnet_buffer (b0)->feature_arc_index, + vnet_buffer (b0)->sw_if_index[VLIB_RX]) > 1)) + vnet_feature_next (&next0, b0); + + if (PREDICT_FALSE (vnet_get_feature_count + (vnet_buffer (b1)->feature_arc_index, + vnet_buffer (b1)->sw_if_index[VLIB_RX]) > 1)) + vnet_feature_next (&next1, b1); + + + if (next0 == HICNPG_DATA_NEXT_DROP) + { + /* Increment a counter */ + content_msgs_received++; + } + + if (next1 == HICNPG_DATA_NEXT_DROP) + { + /* Increment a counter */ + content_msgs_received++; + } + + 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; + } + } + + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, 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]; + + next0 = + HICNPG_DATA_NEXT_DROP + match_data (b0, hpgm->pgen_clt_hicn_name); + + if (PREDICT_FALSE (vnet_get_feature_count + (vnet_buffer (b0)->feature_arc_index, + vnet_buffer (b0)->sw_if_index[VLIB_RX]) > 1)) + vnet_feature_next (&next0, b0); + + if (next0 == HICNPG_DATA_NEXT_DROP) + { + /* 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; + } + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, bi0, 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", + [HICNPG_DATA_NEXT_LOOKUP4] = "ip4-lookup", + [HICNPG_DATA_NEXT_LOOKUP6] = "ip6-lookup", + }, +}; +/* *INDENT-ON* */ + +/* *INDENT-OFF* */ +VNET_FEATURE_INIT(hicn_data_input_ip4_arc, static)= + { + .arc_name = "ip4-unicast", + .node_name = "hicnpg-data", + .runs_before = VNET_FEATURES("ip4-inacl"), + }; +/* *INDENT-ON* */ + + +/* *INDENT-OFF* */ +VNET_FEATURE_INIT(hicn_data_input_ip6_arc, static)= + { + .arc_name = "ip6-unicast", + .node_name = "hicnpg-data", + .runs_before = VNET_FEATURES("ip6-inacl"), + }; +/* *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_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]; + + vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; + vnet_buffer (b1)->sw_if_index[VLIB_TX] = ~0; + + u32 match0 = match_interest (b0, hpgsm->pgen_srv_hicn_name); + u32 match1 = match_interest (b1, hpgsm->pgen_srv_hicn_name); + + if (match0) + { + next0 = match0 - 1; + } + else + 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 (match1) + { + next1 = match1 - 1; + } + else + 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; + } + 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]; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; + + u32 match0 = match_interest (b0, hpgsm->pgen_srv_hicn_name); + + if (match0) + { + next0 = match0 - 1; + } + else + 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 (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_DROP] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +/* *INDENT-OFF* */ +VNET_FEATURE_INIT(hicn_pg_server_ip6, static)= + { + .arc_name = "ip6-unicast", + .node_name = "hicnpg-server", + .runs_before = VNET_FEATURES("ip6-inacl"), + }; +/* *INDENT-ON* */ + +/* *INDENT-OFF* */ +VNET_FEATURE_INIT(hicn_pg_server_ip4, static)= + { + .arc_name = "ip4-unicast", + .node_name = "hicnpg-server", + .runs_before = VNET_FEATURES("ip4-inacl"), + }; +/* *INDENT-ON* */ + +/* + * End of packet-generator server node + */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: eval: (c-set-style "gnu") End: + */ |