test with a special binary...

testing/test_bins/udp_send.c

@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <arpa/inet.h>
+#include <errno.h>
+
+
+#define BUFFER_SIZE 512
+
+char buffer[BUFFER_SIZE];
+
+void create_buffer(uint8_t* buffer, size_t length)
+{
+    for (size_t i = 0; i < length; i++)
+    {
+        buffer[i] = 0xff;
+    }
+}
+
+int main(int argc, char **argv)
+{
+    int sockfd;
+    struct sockaddr_in server;
+
+    create_buffer(buffer, sizeof(buffer));
+
+
+    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+    if (sockfd < 0)
+    {
+        fprintf(stderr, "Error opening socket");
+        return -1;
+    }
+
+    bzero((char*)&server, sizeof(server));
+    server.sin_family = AF_INET;
+    server.sin_addr.s_addr = inet_addr("127.0.0.1");
+    server.sin_port = htons(53);
+    printf("sending...\n");
+    if (sendto(sockfd, &buffer, BUFFER_SIZE, 0,(const struct sockaddr*)&server, sizeof(server)) < 0)
+        {
+            fprintf(stderr, "Error in sendto()\n");
+            return -1;
+        }
+
+
+    return 0;
+}

testing/testrunner/tests.go

@@ -153,7 +153,7 @@ func TestForkExec(et *EventsTraceInstance) {
 }
 
 func TestDNSMonitor(et *EventsTraceInstance) {
-	runTestCmd([]string{"/usr/bin/sh", "-c", "host github.com"})
+	runTestBin("udp_send")
 
 	type dnsOutput struct {
 		Data []uint8 `json:"data"`