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authorAkshayaNadahalli <anadahal@cisco.com>2017-01-23 22:05:35 +0530
committerAkshayaNadahalli <anadahal@cisco.com>2017-03-07 14:08:22 +0000
commit1b563527c143903b6e7e79b5978af5310372f605 (patch)
tree7b673272cb930e03b77dd376f581d903c219a566 /src/plugins/ioam/udp-ping/udp_ping_util.c
parent066f034b903bda6e938bec1b12f01edef65ee9c4 (diff)
In-band OAM active probe (VPP-471)
Change-Id: Icf0ddf76ba1c8b588c79387284cd0349ebc6e45f Signed-off-by: AkshayaNadahalli <anadahal@cisco.com>
Diffstat (limited to 'src/plugins/ioam/udp-ping/udp_ping_util.c')
-rw-r--r--src/plugins/ioam/udp-ping/udp_ping_util.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/src/plugins/ioam/udp-ping/udp_ping_util.c b/src/plugins/ioam/udp-ping/udp_ping_util.c
new file mode 100644
index 00000000000..55f48ea4999
--- /dev/null
+++ b/src/plugins/ioam/udp-ping/udp_ping_util.c
@@ -0,0 +1,330 @@
+/*
+ * Copyright (c) 2017 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 <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/ip6_hop_by_hop.h>
+#include <ioam/encap/ip6_ioam_e2e.h>
+#include <ioam/encap/ip6_ioam_trace.h>
+#include <ioam/udp-ping/udp_ping_packet.h>
+#include <ioam/udp-ping/udp_ping.h>
+
+#define UDP_PING_REWRITE_LEN 1000
+
+u16
+udp_ping_fill_udp_data (udp_ping_t * udp_ping,
+ u16 src_port, u16 dst_port, u8 msg_type, u16 ctx)
+{
+ /* Populate udp ping header */
+ udp_ping->udp.src_port = clib_host_to_net_u16 (src_port);
+ udp_ping->udp.dst_port = clib_host_to_net_u16 (dst_port);
+ udp_ping->udp.length = clib_host_to_net_u16 (sizeof (udp_ping_t));
+ udp_ping->udp.checksum = 0;
+ udp_ping->ping_data.probe_marker1 =
+ clib_host_to_net_u32 (UDP_PING_PROBE_MARKER1);
+ udp_ping->ping_data.probe_marker2 =
+ clib_host_to_net_u32 (UDP_PING_PROBE_MARKER2);
+ udp_ping->ping_data.version = 1;
+ udp_ping->ping_data.msg_type = msg_type;
+ udp_ping->ping_data.flags = clib_host_to_net_u16 (0);
+ udp_ping->ping_data.tel_req_vec = clib_host_to_net_u16 (0);
+ udp_ping->ping_data.hop_limit = 254;
+ udp_ping->ping_data.hop_count = 0;
+ udp_ping->ping_data.reserve = clib_host_to_net_u16 (0);
+ udp_ping->ping_data.max_len =
+ udp_ping->ping_data.cur_len = clib_host_to_net_u16 (0);
+ udp_ping->ping_data.sender_handle = clib_host_to_net_u16 (ctx);
+ udp_ping->ping_data.seq_no = clib_host_to_net_u16 (0);
+
+ return (sizeof (udp_ping_t));
+}
+
+/**
+ * @brief Frame IPv6 udp-ping probe packet.
+ *
+ * Creates IPv6 UDP-Ping probe packet along with iOAM headers.
+ *
+ */
+int
+udp_ping_create_ip6_pak (u8 * buf, /*u16 len, */
+ ip6_address_t src, ip6_address_t dst,
+ u16 src_port, u16 dst_port, u8 msg_type, u16 ctx)
+{
+ ip6_header_t *ip0;
+ ip6_hop_by_hop_header_t *hbh0;
+ //trace_profile *profile = NULL;
+ u16 hbh_len = 0, rnd_size = 0, ip0_len = 0, udp_len = 0;
+ u16 trace_len = 0, trace_data_size = 0;
+ u16 e2e_len = sizeof (ioam_e2e_option_t) - sizeof (ip6_hop_by_hop_option_t);
+ u8 *current = NULL;
+ ioam_trace_option_t *trace_option;
+ ioam_e2e_option_t *e2e;
+
+ ip0 = (ip6_header_t *) buf;
+
+ ip0->ip_version_traffic_class_and_flow_label =
+ clib_host_to_net_u32 (0x6 << 28);
+
+ ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
+ ip0->hop_limit = 255;
+
+ ip0->src_address = src;
+ ip0->dst_address = dst;
+
+ hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
+
+ /* Calculate hbh header len */
+ //profile = trace_profile_find();
+ trace_data_size = fetch_trace_data_size (TRACE_TYPE_IF_TS_APP);
+ /* We need 2 times data for trace as packet traverse back to source */
+ trace_len = sizeof (ioam_trace_option_t) +
+ (5 * trace_data_size * 2) - sizeof (ip6_hop_by_hop_option_t);
+ //(profile->num_elts * trace_data_size * 2);
+ hbh_len = e2e_len + trace_len + sizeof (ip6_hop_by_hop_header_t);
+ rnd_size = (hbh_len + 7) & ~7;
+
+ /* Length of header in 8 octet units, not incl first 8 octets */
+ hbh0->length = (rnd_size >> 3) - 1;
+ hbh0->protocol = IP_PROTOCOL_UDP;
+
+ /* Populate hbh header */
+ current = (u8 *) (hbh0 + 1);
+
+ /* Populate trace */
+ trace_option = (ioam_trace_option_t *) current;
+ trace_option->hdr.type = HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST |
+ HBH_OPTION_TYPE_DATA_CHANGE_ENROUTE;
+ trace_option->hdr.length = trace_len;
+ trace_option->trace_hdr.ioam_trace_type =
+ TRACE_TYPE_IF_TS_APP & TRACE_TYPE_MASK;
+
+ trace_option->trace_hdr.data_list_elts_left = 5 * 2;
+ //profile->num_elts * 2;
+
+ current += trace_option->hdr.length + sizeof (ip6_hop_by_hop_option_t);
+
+ /* Populate e2e */
+ e2e = (ioam_e2e_option_t *) current;
+ e2e->hdr.type = HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE;
+ e2e->hdr.length = e2e_len;
+
+ /* Move past hbh header */
+ current = ((u8 *) hbh0) + ((hbh0->length + 1) << 3);
+
+ /* Populate udp ping header */
+ udp_len = udp_ping_fill_udp_data ((udp_ping_t *) current,
+ src_port, dst_port, msg_type, ctx);
+
+ /* Calculate total length and set it in ip6 header */
+ ip0_len = ((hbh0->length + 1) << 3) + udp_len;
+ //ip0_len = (len > ip0_len) ? len : ip0_len;
+ ip0->payload_length = clib_host_to_net_u16 (ip0_len);
+
+ return (ip0_len + sizeof (ip6_header_t));
+}
+
+int
+udp_ping_compare_flow (ip46_address_t src, ip46_address_t dst,
+ u16 start_src_port, u16 end_src_port,
+ u16 start_dst_port, u16 end_dst_port,
+ ip46_udp_ping_flow * flow)
+{
+ if ((0 == ip46_address_cmp (&flow->src, &src)) &&
+ (0 == ip46_address_cmp (&flow->dst, &dst)) &&
+ (flow->udp_data.start_src_port == start_src_port) &&
+ (flow->udp_data.end_src_port == end_src_port) &&
+ (flow->udp_data.start_dst_port == start_dst_port) &&
+ (flow->udp_data.end_dst_port == end_dst_port))
+ {
+ return 0;
+ }
+
+ return -1;
+}
+
+void
+udp_ping_populate_flow (ip46_address_t src, ip46_address_t dst,
+ u16 start_src_port, u16 end_src_port,
+ u16 start_dst_port, u16 end_dst_port,
+ u16 interval, u8 fault_det, ip46_udp_ping_flow * flow)
+{
+ flow->src = src;
+ flow->dst = dst;
+ flow->udp_data.start_src_port = start_src_port;
+ flow->udp_data.end_src_port = end_src_port;
+ flow->udp_data.start_dst_port = start_dst_port;
+ flow->udp_data.end_dst_port = end_dst_port;
+ flow->udp_data.interval = interval;
+ flow->udp_data.next_send_time = 0;
+ flow->fault_det = fault_det;
+}
+
+void
+udp_ping_create_rewrite (ip46_udp_ping_flow * flow, u16 ctx)
+{
+ u16 src_port;
+ u16 dst_port;
+ u16 no_flows;
+ int i;
+ udp_ping_flow_data *stats;
+
+ no_flows =
+ (flow->udp_data.end_dst_port - flow->udp_data.start_dst_port) + 1;
+ no_flows *=
+ ((flow->udp_data.end_src_port - flow->udp_data.start_src_port) + 1);
+
+ vec_validate_aligned (flow->udp_data.stats,
+ no_flows - 1, CLIB_CACHE_LINE_BYTES);
+
+ i = 0;
+ for (src_port = flow->udp_data.start_src_port;
+ src_port <= flow->udp_data.end_src_port; src_port++)
+ {
+ for (dst_port = flow->udp_data.start_dst_port;
+ dst_port <= flow->udp_data.end_dst_port; dst_port++)
+ {
+ u8 *rewrite = NULL;
+
+ stats = flow->udp_data.stats + i;
+ ioam_analyse_init_data (&stats->analyse_data);
+ stats->analyse_data.is_free = 0;
+
+ vec_validate (rewrite, UDP_PING_REWRITE_LEN - 1);
+ stats->ping_rewrite = rewrite;
+ stats->rewrite_len =
+ udp_ping_create_ip6_pak (rewrite,
+ flow->src.ip6, flow->dst.ip6,
+ src_port, dst_port, UDP_PING_PROBE, ctx);
+ /* For each flow we need to create ioam e2e flow */
+ stats->flow_ctx = ioam_flow_add (1, (u8 *) "udp_ping"); //FIXME
+ i++;
+ }
+ }
+}
+
+void
+udp_ping_free_flow_data (ip46_udp_ping_flow * flow)
+{
+ int i;
+ udp_ping_flow_data *stats;
+
+ for (i = 0; i < vec_len (flow->udp_data.stats); i++)
+ {
+ stats = flow->udp_data.stats + i;
+ vec_free (stats->ping_rewrite);
+ stats->ping_rewrite = NULL;
+ stats->rewrite_len = 0;
+ }
+
+ vec_free (flow->udp_data.stats);
+ flow->udp_data.stats = NULL;
+}
+
+/**
+ * @brief Create and send ipv6 udp-ping probe packet.
+ *
+ */
+void
+udp_ping_send_ip6_pak (vlib_main_t * vm, ip46_udp_ping_flow * flow)
+{
+ u16 no_pak;
+ u32 *buffers = NULL;
+ int i;
+ vlib_buffer_t *b0;
+ udp_ping_flow_data *stats;
+ vlib_frame_t *nf = 0;
+ u32 *to_next;
+ vlib_node_t *next_node;
+
+ next_node = vlib_get_node_by_name (vm, (u8 *) "ip6-lookup");
+ nf = vlib_get_frame_to_node (vm, next_node->index);
+ nf->n_vectors = 0;
+ to_next = vlib_frame_vector_args (nf);
+
+ no_pak = vec_len (flow->udp_data.stats);
+ vec_validate (buffers, (no_pak - 1));
+ if (vlib_buffer_alloc (vm, buffers, vec_len (buffers)) != no_pak)
+ {
+ //Error
+ return;
+ }
+
+ for (i = 0; i < no_pak; i++)
+ {
+ int bogus;
+ b0 = vlib_get_buffer (vm, buffers[i]);
+ stats = flow->udp_data.stats + i;
+ clib_memcpy (b0->data, stats->ping_rewrite, stats->rewrite_len);
+ b0->current_data = 0;
+ b0->current_length = stats->rewrite_len;
+ b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+
+ /* If session is going down, then set path down */
+ if ((stats->retry != 0) && ((stats->retry % MAX_PING_RETRIES) == 0))
+ ip6_ioam_analyse_set_paths_down (&stats->analyse_data);
+
+ stats->retry++;
+ stats->analyse_data.pkt_sent++;
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
+ vnet_buffer (b0)->l2_classify.opaque_index = stats->flow_ctx;
+
+ ip6_header_t *ip6 = vlib_buffer_get_current (b0);
+ ip6_hop_by_hop_header_t *hbh = (ip6_hop_by_hop_header_t *) (ip6 + 1);
+ udp_header_t *udp =
+ (udp_header_t *) ((u8 *) hbh + ((hbh->length + 1) << 3));
+
+ /* If session is down, then set loopback flag in probe.
+ * This is for fault isolation.
+ */
+ if (flow->fault_det && (stats->retry > MAX_PING_RETRIES))
+ {
+ ioam_trace_option_t *opt = (ioam_trace_option_t *)
+ ip6_hbh_get_option (hbh, HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST);
+ ip6_hbh_ioam_trace_set_bit (opt, BIT_LOOPBACK);
+ }
+
+ /* Checksum not pre-computed as we intend to vary packet length for every
+ * probe. its isnt done yet, but to be taken up later.
+ */
+ udp->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6, &bogus);
+ ASSERT (bogus == 0);
+ if (udp->checksum == 0)
+ udp->checksum = 0xffff;
+
+ if (nf->n_vectors == VLIB_FRAME_SIZE)
+ {
+ vlib_put_frame_to_node (vm, next_node->index, nf);
+ nf = vlib_get_frame_to_node (vm, next_node->index);
+ nf->n_vectors = 0;
+ to_next = vlib_frame_vector_args (nf);
+ }
+ *to_next = buffers[i];
+ nf->n_vectors++;
+ to_next++;
+ }
+ vlib_put_frame_to_node (vm, next_node->index, nf);
+
+ flow->udp_data.next_send_time =
+ vlib_time_now (vm) + flow->udp_data.interval;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */