tom_modem: fix sms extraction for huawei modem

Author: FUjr

application/tom_modem/src/operations.c

@@ -100,14 +100,20 @@ int sms_read(PROFILE_T *profile, void *transport_ptr)
     {
         char *line = strtok(response_text, "\n");
         int sms_count = 0;
+        char *pdu;
 
-        while (line != NULL ||  line == "\n")
+        while (line != NULL)
         {
             if (strncmp(line, "+CMGL:", 6) == 0)
             {
                 sms = (SMS_T *)malloc(sizeof(SMS_T));
                 memset(sms, 0, sizeof(SMS_T));
-                char *pdu = strtok(NULL, "\n");
+                
+                pdu = strtok(NULL, "\n");
+                if (pdu == NULL || strlen(pdu) < 3) {
+                    dbg_msg("No PDU found for line: %s", line);
+                    pdu = strtok(NULL, "\n");
+                }
                 sms->sms_pdu = (char *)malloc(strlen(pdu));
                 sms->sender = (char *)malloc(PHONE_NUMBER_SIZE);
                 sms->sms_text = (char *)malloc(SMS_TEXT_SIZE);
@@ -126,6 +132,7 @@ int sms_read(PROFILE_T *profile, void *transport_ptr)
                 }
             }
             line = strtok(NULL, "\n");
+
         }
 
         display_sms_in_json(sms_list, sms_count);
@@ -215,14 +222,18 @@ int sms_read_unread(PROFILE_T *profile, void *transport_ptr)
     {
         char *line = strtok(response_text, "\n");
         int sms_count = 0;
-
-        while (line != NULL || line == "\n")
+        char *pdu;
+        while (line != NULL)
         {
             if (strncmp(line, "+CMGL:", 6) == 0)
             {
                 sms = (SMS_T *)malloc(sizeof(SMS_T));
                 memset(sms, 0, sizeof(SMS_T));
-                char *pdu = strtok(NULL, "\n");
+                pdu = strtok(NULL, "\n");
+                if (pdu == NULL || strlen(pdu) < 3) {
+                    dbg_msg("No PDU found for line: %s", line);
+                    pdu = strtok(NULL, "\n");
+                }
                 sms->sms_pdu = (char *)malloc(strlen(pdu));
                 sms->sender = (char *)malloc(PHONE_NUMBER_SIZE);
                 sms->sms_text = (char *)malloc(SMS_TEXT_SIZE);