gbucchino/dns-trace
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geoffrey 2025-02-09 11:14:36 +01:00
parent 8abce2236f
commit 65a0f2447d
5 changed files with 55 additions and 29 deletions
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2
.gitignore vendored Normal file
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@ -0,0 +1,2 @@
src/**.swp
src/**.log

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dns-trace
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52
dns-trace_2025-02-08.log
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@ -1,22 +1,30 @@
Feb 08 13:24:15 pc-geoffrey dns-trace: <info> Query;tid=671c;192.168.1.37:53;class=IN;type=AAAA;
Feb 08 13:24:16 pc-geoffrey dns-trace: <info> Query;tid=c537;192.168.1.37:53;class=IN;type=A;
Feb 08 13:24:17 pc-geoffrey dns-trace: <info> Query;tid=12ba;192.168.1.37:53;class=IN;type=A;
Feb 08 14:17:10 pc-geoffrey dns-trace: <info> Query;tid=fa8f;192.168.1.37:53;class=IN;type=A;
Feb 08 14:17:20 pc-geoffrey dns-trace: <info> Query;tid=a417;192.168.1.37:53;class=IN;type=A;
Feb 08 14:21:36 pc-geoffrey dns-trace: <info> Query;tid=34f;192.168.1.37:53;class=IN;type=A;
Feb 08 14:23:23 pc-geoffrey dns-trace: <info> Query;tid=23c8;192.168.1.37:53;class=IN;type=A;
Feb 08 14:25:11 pc-geoffrey dns-trace: <info> Query;tid=e74;192.168.1.37:53;class=IN;type=A;
Feb 08 14:25:21 pc-geoffrey dns-trace: <info> Query;tid=3844;192.168.1.37:53;class=IN;type=A;
Feb 08 14:25:28 pc-geoffrey dns-trace: <info> Query;tid=de58;192.168.1.37:53;class=IN;type=A;
Feb 08 14:27:39 pc-geoffrey dns-trace: <info> Query;tid=4600;192.168.1.37:53;class=IN;type=A;
Feb 08 14:28:04 pc-geoffrey dns-trace: <info> Query;tid=1f5a;192.168.1.37:53;class=IN;type=A;
Feb 08 14:29:20 pc-geoffrey dns-trace: <info> Query;tid=3cc6;192.168.1.37:53;class=IN;type=A;
Feb 08 14:35:12 pc-geoffrey dns-trace: <info> Query;tid=a8d2;192.168.1.37:53;class=IN;type=A;
Feb 08 14:35:12 pc-geoffrey dns-trace: <info> Query;tid=e7ae;192.168.1.37:53;class=IN;type=AAAA;
Feb 08 14:35:16 pc-geoffrey dns-trace: <info> Query;tid=ed16;192.168.1.37:53;class=IN;type=A;
Feb 08 14:35:31 pc-geoffrey dns-trace: <info> Query;tid=28a6;192.168.1.37:53;class=IN;type=A;
Feb 08 14:50:39 pc-geoffrey dns-trace: <info> Query;tid=b19f;192.168.1.37:53;class=IN;type=AAAA;
Feb 08 15:05:03 pc-geoffrey dns-trace: <info> Query;tid=cf01;192.168.1.37:53;class=IN;type=AAAA;
Feb 08 15:05:25 pc-geoffrey dns-trace: <info> Query;tid=be09;192.168.1.37:53;class=IN;type=A;
Feb 08 15:05:25 pc-geoffrey dns-trace: <info> Query;tid=67d8;192.168.1.37:53;class=IN;type=A;
Feb 08 15:10:50 pc-geoffrey dns-trace: <info> Query;tid=acaf;192.168.1.37:53;class=IN;type=A;
Feb 08 16:03:16 pc-geoffrey dns-trace: <info> Query;tid=68;192.168.1.37:53;class=IN;type=AAAA;
Feb 08 16:03:16 pc-geoffrey dns-trace: <info> Answer;tid=68;
Feb 08 16:03:23 pc-geoffrey dns-trace: <info> Query;tid=2da6;192.168.1.37:53;class=IN;type=AAAA;
Feb 08 16:03:23 pc-geoffrey dns-trace: <info> Answer;tid=2da6;
Feb 08 16:17:34 pc-geoffrey dns-trace: <info> Query;tid=4f3a;192.168.1.37:53;class=IN;type=A;
Feb 08 16:17:34 pc-geoffrey dns-trace: <info> Query;tid=af42;192.168.1.37:53;class=IN;type=AAAA;
Feb 08 16:17:34 pc-geoffrey dns-trace: <info> Answer;tid=4f3a;
Feb 08 16:18:25 pc-geoffrey dns-trace: <info> Query;tid=e29b;192.168.1.37:53;class=IN;type=A;
Feb 08 16:18:25 pc-geoffrey dns-trace: <info> Answer;tid=e29b;192.168.1.37:45247;
Feb 08 16:19:52 pc-geoffrey dns-trace: <info> Query;tid=a9ff;192.168.1.37:53;class=IN;type=AAAA;
Feb 08 16:19:52 pc-geoffrey dns-trace: <info> Answer;tid=a9ff;192.168.1.37:40040;
Feb 08 16:19:52 pc-geoffrey dns-trace: <info> Answer;tid=a9ff;192.168.1.37:40040;
Feb 08 16:19:52 pc-geoffrey dns-trace: <info> Answer;tid=a9ff;192.168.1.37:40040;
Feb 08 16:21:16 pc-geoffrey dns-trace: <info> Query;tid=b7c2;192.168.1.37:53;class=IN;type=AAAA;www.fortinet.com;
Feb 08 16:21:16 pc-geoffrey dns-trace: <info> Answer;tid=b7c2;192.168.1.37:51591;
Feb 08 16:21:16 pc-geoffrey dns-trace: <info> Answer;tid=b7c2;192.168.1.37:51591;
Feb 08 16:21:16 pc-geoffrey dns-trace: <info> Answer;tid=b7c2;192.168.1.37:51591;
Feb 08 16:21:44 pc-geoffrey dns-trace: <info> Query;tid=9f64;192.168.1.37:53;class=IN;type=A;domain=safebrowsing.googleapis.com;
Feb 08 16:21:44 pc-geoffrey dns-trace: <info> Answer;tid=9f64;192.168.1.37:52355;
Feb 08 16:21:44 pc-geoffrey dns-trace: <info> Query;tid=473f;192.168.1.37:53;class=IN;type=AAAA;domain=www.fortinet.com;
Feb 08 16:21:44 pc-geoffrey dns-trace: <info> Answer;tid=473f;192.168.1.37:59032;
Feb 08 16:21:44 pc-geoffrey dns-trace: <info> Answer;tid=473f;192.168.1.37:59032;
Feb 08 16:21:44 pc-geoffrey dns-trace: <info> Answer;tid=473f;192.168.1.37:59032;
Feb 08 16:21:51 pc-geoffrey dns-trace: <info> Query;tid=22c8;192.168.1.37:53;class=IN;type=AAAA;domain=www.fortinet.com;
Feb 08 16:21:51 pc-geoffrey dns-trace: <info> Answer;tid=22c8;192.168.1.37:40059;
Feb 08 16:21:51 pc-geoffrey dns-trace: <info> Answer;tid=22c8;192.168.1.37:40059;
Feb 08 16:21:51 pc-geoffrey dns-trace: <info> Answer;tid=22c8;192.168.1.37:40059;
Feb 08 16:21:52 pc-geoffrey dns-trace: <info> Query;tid=57f3;192.168.1.37:53;class=IN;type=A;domain=www.bucchino.org;
Feb 08 16:21:52 pc-geoffrey dns-trace: <info> Answer;tid=57f3;192.168.1.37:53594;
Feb 08 16:21:52 pc-geoffrey dns-trace: <info> Answer;tid=57f3;192.168.1.37:53594;

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src/.dns-trace.c.swp
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30
src/dns-trace.c
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@ -282,16 +282,14 @@ static void print_query(struct event *s_event){
printf("\n");
}
/*
* This function save to log file the query section in rsylog format
* <time> <hostname> <procname>: <info> <data>
* This function save to rsyslog file the common information
*/
static void query_to_log(struct event *s_event){
static void header_to_log(struct event *s_event){
char t[32];
time_t ts = time(NULL);
char *req_type, *class, *type;
char tid[12];
char src[40];
char s_class[16], s_type[16];
char *req_type;
time_t ts = time(NULL);
if (syslog_time(ts, t, sizeof(t)) == 0)
fwrite(t, strlen(t), 1, f);
@ -312,6 +310,17 @@ static void query_to_log(struct event *s_event){
snprintf(src, 40, "%s:%d;", inet_ntoa(*(struct in_addr*)&s_event->client), s_event->dport);
fwrite(src, strlen(src), 1, f);
}
/*
* This function save to log file the query section in rsylog format
* <time> <hostname> <procname>: <info> <data>
*/
static void query_to_log(struct event *s_event){
char *class, *type;
char s_class[16], s_type[16];
header_to_log(s_event);
class = mapClass(s_event->class);
snprintf(s_class, 16, "class=%s;", class);
@ -323,7 +332,10 @@ static void query_to_log(struct event *s_event){
fwrite(s_type, strlen(s_type), 1, f);
free(type);
fwrite("\n", 1, 1, f);
fwrite("domain=", 7, 1, f);
fwrite(s_event->qname, strlen(s_event->qname), 1, f);
fwrite(";\n", 2, 1, f);
}
/*
* This function get labels from DNS answer
@ -345,7 +357,11 @@ static void get_labels(unsigned char *buf, char *qname){
* This function save to rsyslog format the answer section
*/
static void answer_to_log(struct event *s_event){
for (int i = 0; i < s_event->numAns; i++){
header_to_log(s_event);
fwrite("\n", 1, 1, f);
}
}
/*
* This function print to the stdout the answer section