IOAM Coverity fix

Coverity IDs - 163911, 163910, 163909, 163908, 163905, 163904, 163896, 161957, 161955

Change-Id: Ida822fa45c6936240f61282e2280541d7e6427b3
Signed-off-by: AkshayaNadahalli <anadahal@cisco.com>

8 files changed, 42 insertions, 34 deletions

diff --git a/src/plugins/ioam/analyse/ioam_analyse.h b/src/plugins/ioam/analyse/ioam_analyse.h
index b7576012e56..3e04c1ca69c 100644
--- a/src/plugins/ioam/analyse/ioam_analyse.h
+++ b/src/plugins/ioam/analyse/ioam_analyse.h
@@ -127,7 +127,8 @@ always_inline f64
 ip6_ioam_analyse_calc_delay (ioam_trace_hdr_t * trace, u16 trace_len,
 			     u8 oneway)
 {
-  u16 size_of_traceopt_per_node, size_of_all_traceopts;
+  u16 size_of_all_traceopts;
+  u8 size_of_traceopt_per_node;
   u8 num_nodes;
   u32 *start_elt, *end_elt, *uturn_elt;;
   u32 start_time, end_time;
@@ -140,13 +141,15 @@ ip6_ioam_analyse_calc_delay (ioam_trace_hdr_t * trace, u16 trace_len,
   size_of_all_traceopts = trace_len;	/*ioam_trace_type,data_list_elts_left */
 
   num_nodes = (u8) (size_of_all_traceopts / size_of_traceopt_per_node);
+  if ((num_nodes == 0) || (num_nodes <= trace->data_list_elts_left))
+    return 0;
 
   num_nodes -= trace->data_list_elts_left;
 
   start_elt = trace->elts;
   end_elt =
     trace->elts +
-    (u32) (size_of_traceopt_per_node * (num_nodes - 1) / sizeof (u32));
+    (u32) ((size_of_traceopt_per_node / sizeof (u32)) * (num_nodes - 1));
 
   if (oneway && (trace->ioam_trace_type & BIT_TTL_NODEID))
     {
@@ -225,6 +228,9 @@ ip6_ioam_analyse_hbh_trace_loopback (ioam_analyser_data_t * data,
   trace_data = &data->trace_data;
 
   size_of_traceopt_per_node = fetch_trace_data_size (trace->ioam_trace_type);
+  if (0 == size_of_traceopt_per_node)
+    goto end;
+
   size_of_all_traceopts = trace_len;
 
   ptr = (u8 *) trace->elts;
diff --git a/src/plugins/ioam/analyse/ioam_summary_export.c b/src/plugins/ioam/analyse/ioam_summary_export.c
index 17fcf7a5b7e..9a2667f67f8 100644
--- a/src/plugins/ioam/analyse/ioam_summary_export.c
+++ b/src/plugins/ioam/analyse/ioam_summary_export.c
@@ -318,7 +318,6 @@ ioam_send_flows (flow_report_main_t * frm, flow_report_t * fr,
 
 	    tp = vlib_buffer_get_current (b0);
 	    ip = &tp->ip4;
-	    udp = &tp->udp;
 	    h = &tp->ipfix.h;
 	    s = &tp->ipfix.s;
 
diff --git a/src/plugins/ioam/encap/ip6_ioam_trace.c b/src/plugins/ioam/encap/ip6_ioam_trace.c
index e31825614c2..2cd1044f317 100644
--- a/src/plugins/ioam/encap/ip6_ioam_trace.c
+++ b/src/plugins/ioam/encap/ip6_ioam_trace.c
@@ -209,7 +209,7 @@ always_inline void
 ip6_hbh_ioam_loopback_handler (vlib_buffer_t * b, ip6_header_t * ip,
 			       ioam_trace_option_t * trace)
 {
-  u32 buffers;
+  u32 buf_index;
   ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main;
   vlib_buffer_t *b0;
   vlib_frame_t *nf = 0;
@@ -218,7 +218,6 @@ ip6_hbh_ioam_loopback_handler (vlib_buffer_t * b, ip6_header_t * ip,
   ip6_header_t *ip6;
   ip6_hop_by_hop_header_t *hbh;
   ioam_trace_option_t *opt;
-  u16 ip6_len;
   udp_ping_t *udp;
 
   next_node = vlib_get_node_by_name (hm->vlib_main, (u8 *) "ip6-lookup");
@@ -226,36 +225,22 @@ ip6_hbh_ioam_loopback_handler (vlib_buffer_t * b, ip6_header_t * ip,
   nf->n_vectors = 0;
   to_next = vlib_frame_vector_args (nf);
 
-  if (vlib_buffer_alloc (hm->vlib_main, &buffers, 1) != 1)
-    return;
-
-  b0 = vlib_get_buffer (hm->vlib_main, buffers);
-  ip6_len = clib_net_to_host_u16 (ip->payload_length);
-  clib_memcpy (b0->data, ip, (ip6_len + sizeof (ip6_header_t)));
-  b0->current_data = 0;
-  b0->current_length = ip6_len + sizeof (ip6_header_t);
-  b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+  b0 = vlib_buffer_copy (hm->vlib_main, b);
+  buf_index = vlib_get_buffer_index (hm->vlib_main, b0);
 
   vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
   vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
 
-  /* Change destination address */
   ip6 = vlib_buffer_get_current (b0);
-  //ip6->src_address = ip->dst_address;
-  //ip6->dst_address = ip->src_address;
-
   hbh = (ip6_hop_by_hop_header_t *) (ip6 + 1);
   opt = (ioam_trace_option_t *)
     ip6_hbh_get_option (hbh, HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST);
 
   udp = (udp_ping_t *) ((u8 *) hbh + ((hbh->length + 1) << 3));
   udp_ping_create_reply_from_probe_ip6 (ip6, hbh, udp);
-  //ip6_hbh_ioam_trace_reset_bit (opt, BIT_LOOPBACK);
   ip6_hbh_ioam_trace_set_bit (opt, BIT_LOOPBACK_REPLY);
-  /* No need to trace loopback packet */
-  //opt->trace_hdr.data_list_elts_left = 0;
 
-  *to_next = buffers;
+  *to_next = buf_index;
   nf->n_vectors++;
   to_next++;
 
diff --git a/src/plugins/ioam/ip6/ioam_cache.h b/src/plugins/ioam/ip6/ioam_cache.h
index aa88d58d8a8..75ec784bf52 100644
--- a/src/plugins/ioam/ip6/ioam_cache.h
+++ b/src/plugins/ioam/ip6/ioam_cache.h
@@ -203,8 +203,8 @@ typedef struct
 
 ioam_cache_main_t ioam_cache_main;
 
-vlib_node_registration_t ioam_cache_node;
-vlib_node_registration_t ioam_cache_ts_node;
+extern vlib_node_registration_t ioam_cache_node;
+extern vlib_node_registration_t ioam_cache_ts_node;
 
 /*  Compute flow hash.  We'll use it to select which Sponge to use for this
  *  flow.  And other things.
@@ -484,16 +484,21 @@ format_ioam_cache_entry (u8 * s, va_list * args)
 {
   ioam_cache_entry_t *e = va_arg (*args, ioam_cache_entry_t *);
   ioam_cache_main_t *cm = &ioam_cache_main;
+  int rewrite_len = vec_len (e->ioam_rewrite_string);
 
   s = format (s, "%d: %U:%d to  %U:%d seq_no %lu\n",
 	      (e - cm->ioam_rewrite_pool),
 	      format_ip6_address, &e->src_address,
 	      e->src_port,
 	      format_ip6_address, &e->dst_address, e->dst_port, e->seq_no);
-  s = format (s, "  %U",
-	      format_ip6_hop_by_hop_ext_hdr,
-	      (ip6_hop_by_hop_header_t *) e->ioam_rewrite_string,
-	      vec_len (e->ioam_rewrite_string) - 1);
+
+  if (rewrite_len)
+    {
+      s = format (s, "  %U",
+		  format_ip6_hop_by_hop_ext_hdr,
+		  (ip6_hop_by_hop_header_t *) e->ioam_rewrite_string,
+		  rewrite_len - 1);
+    }
   return s;
 }
 
@@ -795,7 +800,10 @@ format_ioam_cache_ts_entry (u8 * s, va_list * args)
   vlib_main_t *vm = cm->vlib_main;
   clib_time_t *ct = &vm->clib_time;
 
-  if (e && e->hbh)
+  if (!e)
+    goto end;
+
+  if (e->hbh)
     {
       e2e =
 	ip6_ioam_find_hbh_option (e->hbh,
@@ -826,6 +834,8 @@ format_ioam_cache_ts_entry (u8 * s, va_list * args)
 		 vm->cpu_time_main_loop_start) * ct->seconds_per_clock,
 		e->response_received);
     }
+
+end:
   return s;
 }
 
diff --git a/src/plugins/ioam/ip6/ioam_cache_node.c b/src/plugins/ioam/ip6/ioam_cache_node.c
index 6c8a038a4c1..d930f3395dc 100644
--- a/src/plugins/ioam/ip6/ioam_cache_node.c
+++ b/src/plugins/ioam/ip6/ioam_cache_node.c
@@ -67,8 +67,6 @@ format_cache_trace (u8 * s, va_list * args)
   return s;
 }
 
-vlib_node_registration_t ioam_cache_node;
-
 #define foreach_cache_error \
 _(RECORDED, "ip6 iOAM headers cached")
 
diff --git a/src/plugins/ioam/ip6/ioam_cache_tunnel_select_node.c b/src/plugins/ioam/ip6/ioam_cache_tunnel_select_node.c
index 3df9871e5f6..a56dc040e82 100644
--- a/src/plugins/ioam/ip6/ioam_cache_tunnel_select_node.c
+++ b/src/plugins/ioam/ip6/ioam_cache_tunnel_select_node.c
@@ -67,8 +67,6 @@ format_cache_ts_trace (u8 * s, va_list * args)
   return s;
 }
 
-vlib_node_registration_t ioam_cache_ts_node;
-
 #define foreach_cache_ts_error \
 _(RECORDED, "ip6 iOAM headers cached")
 
diff --git a/src/plugins/ioam/udp-ping/udp_ping_export.c b/src/plugins/ioam/udp-ping/udp_ping_export.c
index ce62d98f861..ce64b606f1f 100644
--- a/src/plugins/ioam/udp-ping/udp_ping_export.c
+++ b/src/plugins/ioam/udp-ping/udp_ping_export.c
@@ -85,7 +85,6 @@ udp_ping_send_flows (flow_report_main_t * frm, flow_report_t * fr,
 
 		  tp = vlib_buffer_get_current (b0);
 		  ip = &tp->ip4;
-		  udp = &tp->udp;
 		  h = &tp->ipfix.h;
 		  s = &tp->ipfix.s;
 
@@ -228,10 +227,12 @@ udp_ping_flow_create (u8 del)
   u32 domain_id = 0;
   flow_report_main_t *frm = &flow_report_main;
 
+  memset (&args, 0, sizeof (args));
   args.rewrite_callback = udp_ping_template_rewrite;
   args.flow_data_callback = udp_ping_send_flows;
   del ? (args.is_add = 0) : (args.is_add = 1);
   args.domain_id = domain_id;
+  args.src_port = UDP_DST_PORT_ipfix;
 
   rv = vnet_flow_report_add_del (frm, &args);
 
diff --git a/src/plugins/ioam/udp-ping/udp_ping_node.c b/src/plugins/ioam/udp-ping/udp_ping_node.c
index 4de8fe2f894..84759b0fab8 100644
--- a/src/plugins/ioam/udp-ping/udp_ping_node.c
+++ b/src/plugins/ioam/udp-ping/udp_ping_node.c
@@ -429,7 +429,18 @@ udp_ping_analyse_hbh (vlib_buffer_t * b0,
   ioam_e2e_option_t *e2e;
   ioam_trace_option_t *trace;
 
+  /* If the packet doesnt match UDP session then return */
+  if (PREDICT_FALSE (pool_is_free_index (udp_ping_main.ip46_flow, flow_id)))
+    return;
+
   ip46_flow = udp_ping_main.ip46_flow + flow_id;
+  /* Check port is within range */
+  if (PREDICT_FALSE ((src_port < ip46_flow->udp_data.start_src_port) ||
+		     (src_port > ip46_flow->udp_data.end_src_port) ||
+		     (dst_port < ip46_flow->udp_data.start_dst_port) ||
+		     (dst_port > ip46_flow->udp_data.end_dst_port)))
+    return;
+
   flow_index = (src_port - ip46_flow->udp_data.start_src_port) *
     (ip46_flow->udp_data.end_dst_port - ip46_flow->udp_data.start_dst_port +
      1);