Added debug tarce for dropped unsecured and MPL packets.

Author: Juha Heiuskanen

source/Common_Protocols/icmpv6.c

@@ -1110,6 +1110,7 @@ buffer_t *icmpv6_up(buffer_t *buf)
                 || (buf->options.type == ICMPV6_TYPE_INFO_RPL_CONTROL
                     && (buf->options.code != ICMPV6_CODE_RPL_DIO
                         && buf->options.code != ICMPV6_CODE_RPL_DIS))) {
+            tr_warn("Drop: ICMP EP unsecured packet");
             goto drop;
         }
     }

source/Common_Protocols/ipv6.c

@@ -1073,6 +1073,7 @@ static buffer_t *ipv6_consider_forwarding_multicast_packet(buffer_t *buf, protoc
 {
     /* Security checks needed here before forwarding */
     if (buf->options.ll_security_bypass_rx) {
+        tr_warn("Drop: unsecured at forwarding layer");
         goto no_forward;
     }
 
@@ -1272,6 +1273,7 @@ buffer_t *ipv6_forwarding_up(buffer_t *buf)
      */
     if (buf->options.ll_security_bypass_rx) {
         if (addr_ipv6_scope(buf->dst_sa.address, cur) != IPV6_SCOPE_LINK_LOCAL) {
+            tr_warn("Drop: unsecured not link local scope packet");
             goto drop;
         }
     }
@@ -1416,6 +1418,7 @@ buffer_t *ipv6_forwarding_up(buffer_t *buf)
 #endif
             default: {
                 if (buf->options.ll_security_bypass_rx) {
+                    tr_warn("Drop: unsecured by BAD Next header %u", *nh_ptr);
                     goto bad_nh;
                 }
                 buffer_socket_set(buf, socket_lookup_ipv6(*nh_ptr, &buf->dst_sa, &buf->src_sa, true));

source/MPL/mpl.c

@@ -406,6 +406,7 @@ static mpl_buffered_message_t *mpl_buffer_create(buffer_t *buf, mpl_domain_t *do
     uint16_t ip_len = buffer_data_length(buf);
 
     while (mpl_total_buffered + ip_len > MAX_BUFFERED_MESSAGES_SIZE) {
+        tr_debug("MPL MAX buffered message size limit...free space");
         mpl_free_space();
     }
 
@@ -427,6 +428,7 @@ static mpl_buffered_message_t *mpl_buffer_create(buffer_t *buf, mpl_domain_t *do
 
     mpl_buffered_message_t *message = ns_dyn_mem_alloc(sizeof(mpl_buffered_message_t) + ip_len);
     if (!message) {
+        tr_debug("No heap for new MPL message");
         return NULL;
     }
     memcpy(message->message, buffer_data_pointer(buf), ip_len);
@@ -475,6 +477,7 @@ static void mpl_buffer_transmit(mpl_domain_t *domain, mpl_buffered_message_t *me
     uint16_t ip_len = mpl_buffer_size(message);
     buffer_t *buf = buffer_get(ip_len);
     if (!buf) {
+        tr_debug("No heap for MPL transmit");
         return;
     }
 
@@ -939,6 +942,9 @@ bool mpl_forwarder_process_message(buffer_t *buf, mpl_domain_t *domain, bool see
     }
 
     message = mpl_buffer_create(buf, domain, seed, sequence, hop_limit);
+    if (!message) {
+        tr_debug("MPL Buffer Craete fail");
+    }
 
     return true;
 }