nDPId-test: added JSON distribution + JSON parsing (Multithreaded design re-using most of nDPId/nDPIsrvd core)

* improved Makefile.old install targets
 * splitted nDPIsrvd_parse into nDPIsrvd_parse_line and nDPIsrvd_parse_all for the sake of readability
 * minor Python script improvments (check for nDPIsrvd.py on multiple locations, may be superseeded by setuptools in the future)
 * some paths needs to be absolute (chdir() during daemonize) and therefor additional checks introduced
 * test run script checks and fails if certain files are are missing (PCAP file <=> result output file)
 * removed not very useful "internal format error" JSON serialization if a BUG for same exists
 * fixed invalid l4 type statistics counters for nDPIsrvd-collectd

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>

utils.c

@@ -55,6 +55,11 @@ static int create_pidfile(char const * const pidfile)
 {
     int pfd;
 
+    if (is_path_absolute("Pidfile", pidfile) != 0)
+    {
+        return 1;
+    }
+
     pfd = open(pidfile, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
 
     if (pfd < 0)
@@ -74,6 +79,20 @@ static int create_pidfile(char const * const pidfile)
     return 0;
 }
 
+int is_path_absolute(char const * const prefix,
+                     char const * const path)
+{
+    if (path[0] != '/')
+    {
+        syslog(LOG_DAEMON | LOG_ERR,
+               "%s path must be absolut i.e. starting with a `/', path given: `%s'",
+               prefix, path);
+        return 1;
+    }
+
+    return 0;
+}
+
 int daemonize_with_pidfile(char const * const pidfile)
 {
     pid_str ps = {};