Added DPDK support to ndpiReader

7 files changed, 242 insertions, 34 deletions

diff --git a/configure.seed b/configure.seed
index f3b267904..11220f885 100644
--- a/configure.seed
+++ b/configure.seed
@@ -40,6 +40,14 @@ AC_CHECK_HEADERS([netinet/in.h stdint.h stdlib.h string.h unistd.h])
 
 PCAP_HOME=$HOME/PF_RING/userland
 
+DPDK_TARGET=
+if test -d $HOME/DPDK; then :
+     echo "Enabling DPDK support in ndpiReader"
+     DPDK_TARGET=dpdk
+else
+    echo  "DPDK support disabled (missing $HOME/DPDK)"
+fi
+
 if test -d $PCAP_HOME; then :
      echo -n ""
 else
@@ -138,7 +146,7 @@ AC_ARG_ENABLE([debug-messages],
 
 AC_CHECK_LIB(pthread, pthread_setaffinity_np, AC_DEFINE_UNQUOTED(HAVE_PTHREAD_SETAFFINITY_NP, 1, [libc has pthread_setaffinity_np]))
 
-AC_CONFIG_FILES([Makefile example/Makefile tests/Makefile libndpi.pc src/include/ndpi_define.h src/lib/Makefile])
+AC_CONFIG_FILES([Makefile example/Makefile example/Makefile.dpdk tests/Makefile libndpi.pc src/include/ndpi_define.h src/lib/Makefile])
 AC_CONFIG_HEADERS(src/include/ndpi_config.h)
 AC_SUBST(GIT_RELEASE)
 AC_SUBST(NDPI_MAJOR)
@@ -152,6 +160,7 @@ AC_SUBST(PCAP_LIB)
 AC_SUBST(DL_LIB)
 AC_SUBST(HS_LIB)
 AC_SUBST(HS_INC)
+AC_SUBST(DPDK_TARGET)
 AC_SUBST(HAVE_PTHREAD_SETAFFINITY_NP)
 
 AC_OUTPUT
diff --git a/example/Makefile.dpdk.in b/example/Makefile.dpdk.in
new file mode 100644
index 000000000..8519d7d0e
--- /dev/null
+++ b/example/Makefile.dpdk.in
@@ -0,0 +1,27 @@
+#
+# Run 'make -f Makefile.dpdk' to compile the DPDK examples
+#
+# See http://core.dpdk.org/doc/quick-start/ for DPDK installation and setup
+#
+ifeq ($(RTE_SDK),)
+#$(error "Please define RTE_SDK environment variable")
+RTE_SDK = $(HOME)/DPDK
+RTE_TARGET = build
+endif
+
+# Default target, can be overridden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+APP = ndpiReader
+LIBNDPI = $(PWD)/../src/lib/libndpi.a
+
+SRCS-y := ndpi_util.c ndpiReader.c
+
+CFLAGS += -g
+CFLAGS += -Wno-strict-prototypes -Wno-missing-prototypes -Wno-missing-declarations -Wno-unused-parameter -I $(PWD)/../src/include @CFLAGS@ -DUSE_DPDK
+LDLIBS = $(LIBNDPI) -lpthread @LDFLAGS@
+
+include $(RTE_SDK)/mk/rte.extapp.mk
+
diff --git a/example/Makefile.in b/example/Makefile.in
index 8c18f94dc..a5ca6acce 100644
--- a/example/Makefile.in
+++ b/example/Makefile.in
@@ -5,7 +5,7 @@ LDFLAGS=$(LIBNDPI) -lpcap -lpthread @LDFLAGS@
 OBJS=ndpiReader.o ndpi_util.o
 PREFIX?=/usr/local
 
-all: ndpiReader
+all: ndpiReader @DPDK_TARGET@
 
 ndpiReader: $(OBJS) $(LIBNDPI)
 	$(CXX) $(CFLAGS) $(OBJS) -o $@ $(LDFLAGS)
@@ -16,6 +16,9 @@ ndpiReader: $(OBJS) $(LIBNDPI)
 install:
 	cp ndpiReader $(DESTDIR)$(PREFIX)/bin
 
+dpdk:
+	make -f Makefile.dpdk
+
 clean:
 	/bin/rm -f *.o ndpiReader
 
diff --git a/example/README.DPDK b/example/README.DPDK
new file mode 100644
index 000000000..472597c3f
--- /dev/null
+++ b/example/README.DPDK
@@ -0,0 +1,31 @@
+Prerequisites
+-------------
+
+You need to install and compile DPDK in your HOME directory as explained in
+See http://core.dpdk.org/doc/quick-start/ for DPDK installation and setup
+
+Once DPDK is built make sure to create a symbolic link
+
+$ cd
+$ ln -s dpdk-18.08 DPDK
+
+so the build process will use the DPDK directory letting you have multiple
+DPDK versions available on your system
+
+
+Build
+-----
+Everything will happen automagically but if you want to do it by hand
+do: make -f Makefile.dpdk
+
+
+Run Application
+---------------
+Supposing to capture packets from device eno1 you can start the
+application as follows:
+
+sudo ./build/ndpiReader -c 1 --vdev=net_pcap0,iface=eno1 -- -v 1
+
+NOTE:
+- ndpiReader without DPDK support sits in this directory
+- ndpiReader with DPDK support can be found inside the ./build directory
diff --git a/example/ndpiReader.c b/example/ndpiReader.c
index faa453ee2..89f5714a8 100644
--- a/example/ndpiReader.c
+++ b/example/ndpiReader.c
@@ -204,7 +204,9 @@ typedef struct ndpi_id {
 
 // used memory counters
 u_int32_t current_ndpi_memory = 0, max_ndpi_memory = 0;
-
+#ifdef USE_DPDK
+static int dpdk_port_id = 0, dpdk_run_capture = 1;
+#endif
 
 void test_lib(); /* Forward */
 
@@ -227,7 +229,11 @@ static void setupDetection(u_int16_t thread_id, pcap_t * pcap_handle);
 static void help(u_int long_help) {
   printf("Welcome to nDPI %s\n\n", ndpi_revision());
 
-  printf("ndpiReader -i <file|device> [-f <filter>][-s <duration>][-m <duration>]\n"
+  printf("ndpiReader "
+#ifndef USE_DPDK
+	 "-i <file|device> "
+#endif
+	 "[-f <filter>][-s <duration>][-m <duration>]\n"
 	 "          [-p <protos>][-l <loops> [-q][-d][-h][-t][-v <level>]\n"
 	 "          [-n <threads>][-w <file>][-c <file>][-j <file>][-x <file>]\n\n"
 	 "Usage:\n"
@@ -457,7 +463,18 @@ static void parseOptions(int argc, char **argv) {
   if(trace) fprintf(trace, " #### %s #### \n", __FUNCTION__);
 #endif
 
-  while ((opt = getopt_long(argc, argv, "c:df:g:i:hp:l:s:tv:V:n:j:rp:w:q0123:456:7:89:m:b:x:", longopts, &option_idx)) != EOF) {
+#ifdef USE_DPDK
+  {
+    int ret = rte_eal_init(argc, argv);
+
+    if(ret < 0)
+      rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
+
+    argc -= ret, argv += ret;
+  }
+#endif
+
+  while((opt = getopt_long(argc, argv, "c:df:g:i:hp:l:s:tv:V:n:j:rp:w:q0123:456:7:89:m:b:x:", longopts, &option_idx)) != EOF) {
 #ifdef DEBUG_TRACE
     if(trace) fprintf(trace, " #### -%c [%s] #### \n", opt, optarg ? optarg : "");
 #endif
@@ -603,7 +620,7 @@ static void parseOptions(int argc, char **argv) {
 
     case '9':
       extcap_packet_filter = ndpi_get_proto_by_name(ndpi_info_mod, optarg);
-      if (extcap_packet_filter == NDPI_PROTOCOL_UNKNOWN) extcap_packet_filter = atoi(optarg);
+      if(extcap_packet_filter == NDPI_PROTOCOL_UNKNOWN) extcap_packet_filter = atoi(optarg);
       break;
 
     case 257:
@@ -616,6 +633,7 @@ static void parseOptions(int argc, char **argv) {
     }
   }
 
+#ifndef USE_DPDK
   if(!bpf_filter_flag) {
     if(do_capture) {
       quiet_mode = 1;
@@ -630,7 +648,7 @@ static void parseOptions(int argc, char **argv) {
     if(strchr(_pcap_file[0], ',')) { /* multiple ingress interfaces */
       num_threads = 0;               /* setting number of threads = number of interfaces */
       __pcap_file = strtok(_pcap_file[0], ",");
-      while (__pcap_file != NULL && num_threads < MAX_NUM_READER_THREADS) {
+      while(__pcap_file != NULL && num_threads < MAX_NUM_READER_THREADS) {
         _pcap_file[num_threads++] = __pcap_file;
         __pcap_file = strtok(NULL, ",");
       }
@@ -647,13 +665,14 @@ static void parseOptions(int argc, char **argv) {
     if(num_cores > 1 && bind_mask != NULL) {
       char *core_id = strtok(bind_mask, ":");
       thread_id = 0;
-      while (core_id != NULL && thread_id < num_threads) {
+      while(core_id != NULL && thread_id < num_threads) {
         core_affinity[thread_id++] = atoi(core_id) % num_cores;
         core_id = strtok(NULL, ":");
       }
     }
 #endif
   }
+#endif
 
 #ifdef DEBUG_TRACE
   if(trace) fclose(trace);
@@ -719,7 +738,7 @@ char* intoaV4(u_int32_t addr, char* buf, u_int16_t bufLen) {
     }
     *--cp = '.';
     addr >>= 8;
-  } while (--n > 0);
+  } while(--n > 0);
 
   /* Convert the string to lowercase */
   retStr = (char*)(cp+1);
@@ -769,7 +788,7 @@ static void printFlow(u_int16_t id, struct ndpi_flow_info *flow, u_int16_t threa
 	      ndpi_get_proto_name(ndpi_thread_info[thread_id].workflow->ndpi_struct, flow->detected_protocol.app_protocol));
 
     if(flow->detected_protocol.category != 0)
-      fprintf(out, "[cat: %s/%u]", 
+      fprintf(out, "[cat: %s/%u]",
 	      ndpi_category_get_name(ndpi_thread_info[thread_id].workflow->ndpi_struct,
 				     flow->detected_protocol.category),
 	      (unsigned int)flow->detected_protocol.category);
@@ -924,7 +943,7 @@ static void node_proto_guess_walker(const void *node, ndpi_VISIT which, int dept
     }
 
     process_ndpi_collected_info(ndpi_thread_info[thread_id].workflow, flow);
-    
+
     ndpi_thread_info[thread_id].workflow->stats.protocol_counter[flow->detected_protocol.app_protocol]       += flow->src2dst_packets + flow->dst2src_packets;
     ndpi_thread_info[thread_id].workflow->stats.protocol_counter_bytes[flow->detected_protocol.app_protocol] += flow->src2dst_bytes + flow->dst2src_bytes;
     ndpi_thread_info[thread_id].workflow->stats.protocol_flows[flow->detected_protocol.app_protocol]++;
@@ -985,7 +1004,7 @@ int updateIpTree(u_int32_t key, u_int8_t version,
   if(rootp == (addr_node **)0)
     return 0;
 
-  while (*rootp != (addr_node *)0) {
+  while(*rootp != (addr_node *)0) {
     /* Knuth's T1: */
     if((version == (*rootp)->version) && (key == (*rootp)->addr)) {
       /* T2: */
@@ -1015,7 +1034,7 @@ int updateIpTree(u_int32_t key, u_int8_t version,
 /* *********************************************** */
 
 void freeIpTree(addr_node *root) {
-  if (root == NULL)
+  if(root == NULL)
     return;
 
   freeIpTree(root->left);
@@ -1210,9 +1229,9 @@ static void deleteReceivers(struct receiver *receivers) {
 /* *********************************************** */
 /* implementation of: https://jeroen.massar.ch/presentations/files/FloCon2010-TopK.pdf
  *
- * if (table1.size < max1 || acceptable){
+ * if(table1.size < max1 || acceptable){
  *    create new element and add to the table1
- *    if (table1.size > max2) {
+ *    if(table1.size > max2) {
  *      cut table1 back to max1
  *      merge table 1 to table2
  *      if(table2.size > max1)
@@ -2266,9 +2285,13 @@ free_stats:
  * @brief Force a pcap_dispatch() or pcap_loop() call to return
  */
 static void breakPcapLoop(u_int16_t thread_id) {
+#ifdef USE_DPDK
+  dpdk_run_capture = 0;
+#else
   if(ndpi_thread_info[thread_id].workflow->pcap_handle != NULL) {
     pcap_breakloop(ndpi_thread_info[thread_id].workflow->pcap_handle);
   }
+#endif
 }
 
 /**
@@ -2335,15 +2358,26 @@ static void configurePcapHandle(pcap_t * pcap_handle) {
  * @brief Open a pcap file or a specified device - Always returns a valid pcap_t
  */
 static pcap_t * openPcapFileOrDevice(u_int16_t thread_id, const u_char * pcap_file) {
-
   u_int snaplen = 1536;
   int promisc = 1;
   char pcap_error_buffer[PCAP_ERRBUF_SIZE];
   pcap_t * pcap_handle = NULL;
 
   /* trying to open a live interface */
-  if((pcap_handle = pcap_open_live((char*)pcap_file, snaplen, promisc,
-				   500, pcap_error_buffer)) == NULL) {
+#ifdef USE_DPDK
+  struct rte_mempool *mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS,
+							  MBUF_CACHE_SIZE, 0,
+							  RTE_MBUF_DEFAULT_BUF_SIZE,
+							  rte_socket_id());
+
+  if(mbuf_pool == NULL)
+    rte_exit(EXIT_FAILURE, "Cannot create mbuf pool: are hugepages ok?\n");
+
+  if(dpdk_port_init(dpdk_port_id, mbuf_pool) != 0)
+    rte_exit(EXIT_FAILURE, "DPDK: Cannot init port %u: please see README.dpdk\n", dpdk_port_id);
+#else
+  if((pcap_handle = pcap_open_live((char*)pcap_file, snaplen,
+				   promisc, 500, pcap_error_buffer)) == NULL) {
     capture_for = capture_until = 0;
 
     live_capture = 0;
@@ -2370,11 +2404,17 @@ static pcap_t * openPcapFileOrDevice(u_int16_t thread_id, const u_char * pcap_fi
   } else {
     live_capture = 1;
 
-    if((!json_flag) && (!quiet_mode))
+    if((!json_flag) && (!quiet_mode)) {
+#ifdef USE_DPDK
+      printf("Capturing from DPDK (port 0)...\n");
+#else
       printf("Capturing live traffic from device %s...\n", pcap_file);
+#endif
+    }
   }
 
   configurePcapHandle(pcap_handle);
+#endif /* !DPDK */
 
   if(capture_for > 0) {
     if((!json_flag) && (!quiet_mode))
@@ -2520,13 +2560,13 @@ static void runPcapLoop(u_int16_t thread_id) {
  * @brief Process a running thread
  */
 void * processing_thread(void *_thread_id) {
-
   long thread_id = (long) _thread_id;
   char pcap_error_buffer[PCAP_ERRBUF_SIZE];
 
 #if defined(linux) && defined(HAVE_PTHREAD_SETAFFINITY_NP)
   if(core_affinity[thread_id] >= 0) {
     cpu_set_t cpuset;
+    
     CPU_ZERO(&cpuset);
     CPU_SET(core_affinity[thread_id], &cpuset);
 
@@ -2539,6 +2579,33 @@ void * processing_thread(void *_thread_id) {
 #endif
     if((!json_flag) && (!quiet_mode)) printf("Running thread %ld...\n", thread_id);
 
+#ifdef USE_DPDK
+  while(dpdk_run_capture) {
+    struct rte_mbuf *bufs[BURST_SIZE];
+    u_int16_t num = rte_eth_rx_burst(dpdk_port_id, 0, bufs, BURST_SIZE);
+    u_int i;
+    
+    if(num == 0) {
+      usleep(1);
+      continue;
+    }
+
+    for(i = 0; i < PREFETCH_OFFSET && i < num; i++)
+      rte_prefetch0(rte_pktmbuf_mtod(bufs[i], void *));
+
+    for(i = 0; i < num; i++) {
+      char *data = rte_pktmbuf_mtod(bufs[i], char *);
+      int len = rte_pktmbuf_pkt_len(bufs[i]);
+      struct pcap_pkthdr h;
+
+      h.len = h.caplen = len;
+      gettimeofday(&h.ts, NULL);
+
+      pcap_process_packet((u_char*)&thread_id, &h, (const u_char *)data);
+      rte_pktmbuf_free(bufs[i]);
+    }
+  }
+#else
 pcap_loop:
   runPcapLoop(thread_id);
 
@@ -2551,6 +2618,7 @@ pcap_loop:
       goto pcap_loop;
     }
   }
+#endif
 
   return NULL;
 }
@@ -3239,7 +3307,7 @@ int orginal_main(int argc, char **argv) {
     automataUnitTest();
 
     ndpi_info_mod = ndpi_init_detection_module();
-    if (ndpi_info_mod == NULL) return -1;
+    if(ndpi_info_mod == NULL) return -1;
 
     memset(ndpi_thread_info, 0, sizeof(ndpi_thread_info));
 
diff --git a/example/ndpi_util.c b/example/ndpi_util.c
index 977a246ec..1a0d45914 100644
--- a/example/ndpi_util.c
+++ b/example/ndpi_util.c
@@ -219,7 +219,7 @@ void ndpi_flow_info_freer(void *node) {
 /* ***************************************************** */
 
 void ndpi_workflow_free(struct ndpi_workflow * workflow) {
-  int i;
+  u_int i;
 
   for(i=0; i<workflow->prefs.num_roots; i++)
     ndpi_tdestroy(workflow->ndpi_flows_root[i], ndpi_flow_info_freer);
@@ -232,8 +232,8 @@ void ndpi_workflow_free(struct ndpi_workflow * workflow) {
 /* ***************************************************** */
 
 int ndpi_workflow_node_cmp(const void *a, const void *b) {
-  struct ndpi_flow_info *fa = (struct ndpi_flow_info*)a;
-  struct ndpi_flow_info *fb = (struct ndpi_flow_info*)b;
+  const struct ndpi_flow_info *fa = (const struct ndpi_flow_info*)a;
+  const struct ndpi_flow_info *fb = (const struct ndpi_flow_info*)b;
 
   if(fa->hashval < fb->hashval) return(-1); else if(fa->hashval > fb->hashval) return(1);
 
@@ -307,7 +307,7 @@ static struct ndpi_flow_info *get_ndpi_flow_info(struct ndpi_workflow * workflow
   u_int32_t idx, l4_offset, hashval;
   struct ndpi_flow_info flow;
   void *ret;
-  u_int8_t *l3, *l4;
+  const u_int8_t *l3, *l4;
 
   /*
     Note: to keep things simple (ndpiReader is just a demo app)
@@ -322,10 +322,10 @@ static struct ndpi_flow_info *get_ndpi_flow_info(struct ndpi_workflow * workflow
       return NULL;
 
     l4_offset = iph->ihl * 4;
-    l3 = (u_int8_t*)iph;
+    l3 = (const u_int8_t*)iph;
   } else {
     l4_offset = sizeof(struct ndpi_ipv6hdr);
-    l3 = (u_int8_t*)iph6;
+    l3 = (const u_int8_t*)iph6;
   }
 
   if(l4_packet_len < 64)
@@ -345,7 +345,7 @@ static struct ndpi_flow_info *get_ndpi_flow_info(struct ndpi_workflow * workflow
     workflow->stats.max_packet_len = l4_packet_len;
 
   *proto = iph->protocol;
-  l4 = ((u_int8_t *) l3 + l4_offset);
+  l4 = ((const u_int8_t *) l3 + l4_offset);
 
   if(iph->protocol == IPPROTO_TCP && l4_packet_len >= 20) {
     u_int tcp_len;
@@ -355,7 +355,7 @@ static struct ndpi_flow_info *get_ndpi_flow_info(struct ndpi_workflow * workflow
     *tcph = (struct ndpi_tcphdr *)l4;
     *sport = ntohs((*tcph)->source), *dport = ntohs((*tcph)->dest);
     tcp_len = ndpi_min(4*(*tcph)->doff, l4_packet_len);
-    *payload = &l4[tcp_len];
+    *payload = (u_int8_t*)&l4[tcp_len];
     *payload_len = ndpi_max(0, l4_packet_len-4*(*tcph)->doff);
   } else if(iph->protocol == IPPROTO_UDP && l4_packet_len >= 8) {
     // udp
@@ -363,8 +363,8 @@ static struct ndpi_flow_info *get_ndpi_flow_info(struct ndpi_workflow * workflow
     workflow->stats.udp_count++;
     *udph = (struct ndpi_udphdr *)l4;
     *sport = ntohs((*udph)->source), *dport = ntohs((*udph)->dest);
-    *payload = &l4[sizeof(struct ndpi_udphdr)];
-    *payload_len = ndpi_max(0, l4_packet_len-sizeof(struct ndpi_udphdr));
+    *payload = (u_int8_t*)&l4[sizeof(struct ndpi_udphdr)];
+    *payload_len = (l4_packet_len > sizeof(struct ndpi_udphdr)) ? l4_packet_len-sizeof(struct ndpi_udphdr) : 0;
   } else {
     // non tcp/udp protocols
     *sport = *dport = 0;
@@ -507,7 +507,7 @@ static struct ndpi_flow_info *get_ndpi_flow_info6(struct ndpi_workflow * workflo
   iph.protocol = iph6->ip6_hdr.ip6_un1_nxt;
 
   if(iph.protocol == IPPROTO_DSTOPTS /* IPv6 destination option */) {
-    u_int8_t *options = (u_int8_t*)iph6 + sizeof(const struct ndpi_ipv6hdr);
+    const u_int8_t *options = (const u_int8_t*)iph6 + sizeof(const struct ndpi_ipv6hdr);
 
     iph.protocol = options[0];
   }
@@ -530,7 +530,7 @@ void process_ndpi_collected_info(struct ndpi_workflow * workflow, struct ndpi_fl
 
   /* BITTORRENT */
   if(flow->detected_protocol.app_protocol == NDPI_PROTOCOL_BITTORRENT) {
-    int i, j, n = 0;
+    u_int i, j, n = 0;
 
     for(i=0, j = 0; j < sizeof(flow->bittorent_hash)-1; i++) {
       sprintf(&flow->bittorent_hash[j], "%02x",
@@ -751,8 +751,14 @@ struct ndpi_proto ndpi_workflow_process_packet (struct ndpi_workflow * workflow,
   workflow->last_time = time;
 
   /*** check Data Link type ***/
-  const int datalink_type = pcap_datalink(workflow->pcap_handle);
+  int datalink_type;
 
+#ifdef USE_DPDK
+  datalink_type = DLT_EN10MB;
+#else
+  datalink_type = (int)pcap_datalink(workflow->pcap_handle);
+#endif
+  
 datalink_check:
   switch(datalink_type) {
   case DLT_NULL:
@@ -1076,3 +1082,49 @@ u_int32_t ethernet_crc32(const void* data, size_t n_bytes) {
   __crc32(data, n_bytes, &crc);
   return crc;
 }
+
+/* *********************************************** */
+
+#ifdef USE_DPDK
+
+static const struct rte_eth_conf port_conf_default = {
+  .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN }
+};
+
+/* ************************************ */
+
+int dpdk_port_init(int port, struct rte_mempool *mbuf_pool) {
+  struct rte_eth_conf port_conf = port_conf_default;
+  const u_int16_t rx_rings = 1, tx_rings = 1;
+  int retval;
+  u_int16_t q;
+
+  /* 1 RX queue */
+  retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
+
+  if(retval != 0)
+    return retval;
+
+  for (q = 0; q < rx_rings; q++) {
+    retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE, rte_eth_dev_socket_id(port), NULL, mbuf_pool);
+    if(retval < 0)
+      return retval;
+  }
+
+  for (q = 0; q < tx_rings; q++) {
+    retval = rte_eth_tx_queue_setup(port, q, TX_RING_SIZE, rte_eth_dev_socket_id(port), NULL);
+    if(retval < 0)
+      return retval;
+  }
+
+  retval = rte_eth_dev_start(port);
+
+  if(retval < 0)
+    return retval;
+
+  rte_eth_promiscuous_enable(port);
+
+  return 0;
+}
+
+#endif
diff --git a/example/ndpi_util.h b/example/ndpi_util.h
index d1d461490..eb9ab8e65 100644
--- a/example/ndpi_util.h
+++ b/example/ndpi_util.h
@@ -31,6 +31,24 @@
 
 #include <pcap.h>
 
+#ifdef USE_DPDK
+#include <rte_eal.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_cycles.h>
+#include <rte_lcore.h>
+#include <rte_mbuf.h>
+
+#define RX_RING_SIZE     128
+#define TX_RING_SIZE     512
+#define NUM_MBUFS       8191
+#define MBUF_CACHE_SIZE  250
+#define BURST_SIZE        32
+#define PREFETCH_OFFSET    3
+
+extern int dpdk_port_init(int port, struct rte_mempool *mbuf_pool);
+#endif
+
 #define MAX_NUM_READER_THREADS     16
 #define IDLE_SCAN_PERIOD           10 /* msec (use TICK_RESOLUTION = 1000) */
 #define MAX_IDLE_TIME           30000