Coverity fixes

features/cellular/framework/common/CellularUtil.cpp

@@ -236,7 +236,7 @@ void prefer_ipv6(char *ip, size_t ip_size, char *ip2, size_t ip2_size)
         if (temp) {
             // ipv6 was found in ip2 but not in ip ---> we must swap them. Sadly ip and ip2 might not be pointers
             // so we can't just swap them, must use copy.
-            if (strlen(ip) < ip2_size && strlen(ip2) < ip_size && strlen(ip) < 64) {
+            if (strlen(ip) < ip2_size && strlen(ip2) < ip_size && strlen(ip) < 64 && strlen(ip2) < 64) {
                 char tmp[64];
                 strncpy(tmp, ip, strlen(ip));
                 tmp[strlen(ip)] = '\0';

features/cellular/framework/targets/RiotMicro/AT/RM1000_AT_CellularStack.cpp

@@ -281,10 +281,9 @@ nsapi_size_or_error_t RM1000_AT_CellularStack::socket_recvfrom_impl(CellularSock
         } else {
             if (count == 0) {
                 // Timeout with nothing received
-                nsapi_error_size = NSAPI_ERROR_WOULD_BLOCK;
                 success = false;
             }
-            size = 0; // This simply to cause an exit
+            break;
         }
     }
     timer.stop();

features/cellular/framework/targets/UBLOX/AT/UBLOX_AT_CellularStack.cpp

@@ -302,10 +302,9 @@ nsapi_size_or_error_t UBLOX_AT_CellularStack::socket_recvfrom_impl(CellularSocke
             } else {
                 if (count == 0) {
                     // Timeout with nothing received
-                    nsapi_error_size = NSAPI_ERROR_WOULD_BLOCK;
                     success = false;
                 }
-                size = 0; // This simply to cause an exit
+                break;
             }
         }
     } else if (socket->proto == NSAPI_TCP) {
@@ -346,10 +345,9 @@ nsapi_size_or_error_t UBLOX_AT_CellularStack::socket_recvfrom_impl(CellularSocke
             } else {
                 if (count == 0) {
                     // Timeout with nothing received
-                    nsapi_error_size = NSAPI_ERROR_WOULD_BLOCK;
                     success = false;
                 }
-                size = 0; // This simply to cause an exit
+                break;
             }
         }
     }

features/frameworks/mbed-coap/source/sn_coap_builder.c

@@ -484,15 +484,6 @@ static uint8_t sn_coap_builder_options_calculate_jump_need(const sn_coap_hdr_s *
         }
     }
 
-    else {
-        if (src_coap_msg_ptr->uri_path_ptr != 0) {
-            previous_option_number = (COAP_OPTION_URI_PATH);
-        }
-
-        if (src_coap_msg_ptr->content_format != COAP_CT_NONE) {
-            previous_option_number = (COAP_OPTION_CONTENT_FORMAT);
-        }
-    }
     return needed_space;
 }
 

features/nanostack/sal-stack-nanostack/source/6LoWPAN/Thread/thread_mle_message_handler.c

@@ -514,7 +514,7 @@ static void thread_parse_annoucement(protocol_interface_info_entry_t *cur, mle_m
     channel_page = ptr[0];
     channel = common_read_16_bit(&ptr[1]);
 
-    if (linkConfiguration->timestamp == timestamp) {
+    if (linkConfiguration && linkConfiguration->timestamp == timestamp) {
         // We received same timestamp
         tr_debug("Same timestamp");
         return;
@@ -527,7 +527,7 @@ static void thread_parse_annoucement(protocol_interface_info_entry_t *cur, mle_m
     }
 
 
-    if (linkConfiguration->timestamp > timestamp) {
+    if (linkConfiguration && linkConfiguration->timestamp > timestamp) {
         // We received older time stamp we just announce back to originator channel
         thread_bootstrap_announce_send(cur, linkConfiguration->channel_page, linkConfiguration->rfChannel, linkConfiguration->panId, linkConfiguration->timestamp, channel);
         return;