dns plugin: Improve / remove error and debug messages.

diff --git a/src/dns.c b/src/dns.c
index f3280c0..6e63fe4 100644 (file)
--- a/src/dns.c
+++ b/src/dns.c
@@ -80,14 +80,10 @@ static counter_list_t *counter_list_search (counter_list_t **list, unsigned int
 {
        counter_list_t *entry;
 
-       DEBUG ("counter_list_search (list = %p, key = %u)",
-                       (void *) *list, key);
-
        for (entry = *list; entry != NULL; entry = entry->next)
                if (entry->key == key)
                        break;
 
-       DEBUG ("return (%p)", (void *) entry);
        return (entry);
 }
 
@@ -96,9 +92,6 @@ static counter_list_t *counter_list_create (counter_list_t **list,
 {
        counter_list_t *entry;
 
-       DEBUG ("counter_list_create (list = %p, key = %u, value = %u)",
-                       (void *) *list, key, value);
-
        entry = (counter_list_t *) malloc (sizeof (counter_list_t));
        if (entry == NULL)
                return (NULL);
@@ -122,7 +115,6 @@ static counter_list_t *counter_list_create (counter_list_t **list,
                last->next = entry;
        }
 
-       DEBUG ("return (%p)", (void *) entry);
        return (entry);
 }
 
@@ -131,9 +123,6 @@ static void counter_list_add (counter_list_t **list,
 {
        counter_list_t *entry;
 
-       DEBUG ("counter_list_add (list = %p, key = %u, increment = %u)",
-                       (void *) *list, key, increment);
-
        entry = counter_list_search (list, key);
 
        if (entry != NULL)
@@ -144,7 +133,6 @@ static void counter_list_add (counter_list_t **list,
        {
                counter_list_create (list, key, increment);
        }
-       DEBUG ("return ()");
 }
 
 static int dns_config (const char *key, const char *value)
@@ -261,7 +249,7 @@ static void *dns_child_loop (void __attribute__((unused)) *dummy)
                return (NULL);
        }
 
-       DEBUG ("PCAP object created.");
+       DEBUG ("dns plugin: PCAP object created.");
 
        dnstop_set_pcap_obj (pcap_obj);
        dnstop_set_callback (dns_child_callback);
@@ -274,7 +262,7 @@ static void *dns_child_loop (void __attribute__((unused)) *dummy)
                ERROR ("dns plugin: Listener thread is exiting "
                                "abnormally: %s", pcap_geterr (pcap_obj));
 
-       DEBUG ("child is exiting");
+       DEBUG ("dns plugin: Child is exiting.");
 
        pcap_close (pcap_obj);
        listen_thread_init = 0;
@@ -375,7 +363,7 @@ static int dns_read (void)
 
        for (i = 0; i < len; i++)
        {
-               DEBUG ("qtype = %u; counter = %u;", keys[i], values[i]);
+               DEBUG ("dns plugin: qtype = %u; counter = %u;", keys[i], values[i]);
                submit_counter ("dns_qtype", qtype_str (keys[i]), values[i]);
        }
 
@@ -391,7 +379,7 @@ static int dns_read (void)
 
        for (i = 0; i < len; i++)
        {
-               DEBUG ("opcode = %u; counter = %u;", keys[i], values[i]);
+               DEBUG ("dns plugin: opcode = %u; counter = %u;", keys[i], values[i]);
                submit_counter ("dns_opcode", opcode_str (keys[i]), values[i]);
        }
 
@@ -407,7 +395,7 @@ static int dns_read (void)
 
        for (i = 0; i < len; i++)
        {
-               DEBUG ("rcode = %u; counter = %u;", keys[i], values[i]);
+               DEBUG ("dns plugin: rcode = %u; counter = %u;", keys[i], values[i]);
                submit_counter ("dns_rcode", rcode_str (keys[i]), values[i]);
        }
 

diff --git a/src/utils_dns.c b/src/utils_dns.c
index 66798e2..22c9b95 100644 (file)
--- a/src/utils_dns.c
+++ b/src/utils_dns.c
@@ -358,10 +358,10 @@ handle_dns(const char *buf, int len)
     uint16_t us;
     off_t offset;
     char *t;
-    int x;
+    int status;
 
     /* The DNS header is 12 bytes long */
-    if (len < 12)
+    if (len < DNS_MSG_HDR_SZ)
        return 0;
 
     memcpy(&us, buf + 0, 2);
@@ -392,11 +392,15 @@ handle_dns(const char *buf, int len)
     memcpy(&us, buf + 10, 2);
     qh.arcount = ntohs(us);
 
-    offset = 12;
+    offset = DNS_MSG_HDR_SZ;
     memset(qh.qname, '\0', MAX_QNAME_SZ);
-    x = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
-    if (0 != x)
+    status = rfc1035NameUnpack(buf, len, &offset, qh.qname, MAX_QNAME_SZ);
+    if (status != 0)
+    {
+       INFO ("utils_dns: handle_dns: rfc1035NameUnpack failed "
+               "with status %i.", status);
        return 0;
+    }
     if ('\0' == qh.qname[0])
        sstrncpy (qh.qname, ".", sizeof (qh.qname));
     while ((t = strchr(qh.qname, '\n')))
@@ -660,10 +664,6 @@ void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt
 {
     int status;
 
-    DEBUG ("handle_pcap (udata = %p, hdr = %p, pkt = %p): hdr->caplen = %i\n",
-                   (void *) udata, (void *) hdr, (void *) pkt,
-                   hdr->caplen);
-
     if (hdr->caplen < ETHER_HDR_LEN)
        return;
 
@@ -697,7 +697,7 @@ void handle_pcap(u_char *udata, const struct pcap_pkthdr *hdr, const u_char *pkt
            break;
 
        default:
-           ERROR ("handle_pcap: unsupported data link type %d\n",
+           ERROR ("handle_pcap: unsupported data link type %d",
                    pcap_datalink(pcap_obj));
            status = 0;
            break;