/*
- * Copyright (C) 2018 All rights reserved.
+ * Copyright (C) 2018 jingle YANG. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
Date: Dec 16, 2018
Description:
-1. Pcap-dpdk provides libpcap the ability to use DPDK with the device name as dpdk:[portid], such as dpdk:0.
-2. DPDK is a set of libraries and drivers for fast packet processing. (https://www.dpdk.org/)
+1. Pcap-dpdk provides libpcap the ability to use DPDK with the device name as dpdk:{portid}, such as dpdk:0.
+2. DPDK is a set of libraries and drivers for fast packet processing. (https://www.dpdk.org/)
+3. The testprogs/capturetest provides 6.4Gbps/800,000 pps on Intel 10-Gigabit X540-AT2 with DPDK 18.11.
Limitations:
-1. By default enable_dpdk is no, unless you set inlcudes and lib dir
-by --with-dpdk-includes= --with-dpdk-libraries=
+1. DPDK support will be on if DPDK is available. Please set DIR for --with-dpdk[=DIR] with ./configure or -DDPDK_DIR[=DIR] with cmake if DPDK is installed manually.
2. Only support link libdpdk.so dynamicly, because the libdpdk.a will not work correctly.
3. Only support read operation, and packet injection has not been supported yet.
-4. I have tested on DPDK v18.11.
+
Usage:
-1. compile DPDK as shared library and install.(https://github.com/DPDK/dpdk.git)
+1. Compile DPDK as shared library and install.(https://github.com/DPDK/dpdk.git)
You shall modify the file $RTE_SDK/$RTE_TARGET/.config and set:
CONFIG_RTE_BUILD_SHARED_LIB=y
+By the following command:
+sed -i 's/CONFIG_RTE_BUILD_SHARED_LIB=n/CONFIG_RTE_BUILD_SHARED_LIB=y/' $RTE_SDK/$RTE_TARGET/.config
-2. launch l2fwd that is one of DPDK examples correctly, and get device information.
+2. Launch l2fwd that is one of DPDK examples correctly, and get device information.
You shall learn how to bind nic with DPDK-compatible driver by $RTE_SDK/usertools/dpdk-devbind.py, such as igb_uio.
And enable hugepages by dpdk-setup.sh
Then launch the l2fwd with dynamic dirver support. For example:
$RTE_SDK/examples/l2fwd/$RTE_TARGET/l2fwd -dlibrte_pmd_e1000.so -dlibrte_pmd_ixgbe.so -dlibrte_mempool_ring.so -- -p 0x1
-3. compile libpcap with dpdk options.
-
-you shall run the following command to generate a new configure
+3. Compile libpcap with dpdk options.
-make clean
-autoreconf
+If DPDK has not been found automatically, you shall export DPDK envionment variable which are used for compiling DPDK. And then pass $RTE_SDK/$RTE_TARGET to --with-dpdk or -DDPDK_DIR
-Then, run configure with dpdk options.
-For Ubuntu, they are --with-dpdk-includes=/usr/local/include/dpdk/ --with-dpdk-libraries=/usr/local/lib
+export RTE_SDK={your DPDK base directory}
+export RTE_TARGET={your target name}
-4. link your own program with libpcap, and use DPDK with the device name as dpdk[portid], such as dpdk:0.
-And you shall set DPDK configure options by environment variable DPDK_CFG
-For example, the testprogs/capturetest could be lanched by:
+3.1 With configure
-env DPDK_CFG="--log-level=debug -l0 -dlibrte_pmd_e1000.so -dlibrte_pmd_ixgbe.so -dlibrte_mempool_ring.so" ./capturetest -i dpdk:0
+./configure --with-dpdk=$RTE_SDK/$RTE_TARGET && make -s all && make -s testprogs && make install
-The program will print the following message on my computer:
+3.2 With cmake
-USER1: dpdk cfg: libpcap_dpdk --log-level=debug -l0 -dlibrte_pmd_e1000.so -dlibrte_pmd_ixgbe.so -dlibrte_mempool_ring.so
-EAL: Detected 4 lcore(s)
-EAL: Detected 1 NUMA nodes
-EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
-EAL: No free hugepages reported in hugepages-1048576kB
-EAL: Probing VFIO support...
-EAL: PCI device 0000:00:19.0 on NUMA socket -1
-EAL: Invalid NUMA socket, default to 0
-EAL: probe driver: 8086:1559 net_e1000_em
-USER1: pcap_dpdk_activate device dpdk:0 portid 0, pci_addr: 0000:00:19.0
-USER1: Port 0 Link Up. Speed 1000 Mbps - full-duplex
-USER1: Port 0, MAC address: [MAC ADDR]
+mkdir -p build && cd build && cmake -DDPDK_DIR=$RTE_SDK/$RTE_TARGET ../ && make -s all && make -s testprogs && make install
-Listening on dpdk:0
-USER1: dpdk: lcoreid=0 runs for portid=0
+4. Link your own program with libpcap, and use DPDK with the device name as dpdk:{portid}, such as dpdk:0.
+And you shall set DPDK configure options by environment variable DPDK_CFG
+For example, the testprogs/capturetest could be lanched by:
+env DPDK_CFG="--log-level=debug -l0 -dlibrte_pmd_e1000.so -dlibrte_pmd_ixgbe.so -dlibrte_mempool_ring.so" ./capturetest -i dpdk:0
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
-#include <ctype.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <sys/time.h>
//header for calling dpdk
+#include <rte_config.h>
#include <rte_common.h>
+#include <rte_errno.h>
#include <rte_log.h>
#include <rte_malloc.h>
#include <rte_memory.h>
#include "pcap-int.h"
#include "pcap-dpdk.h"
+#define DPDK_DEF_LOG_LEV RTE_LOG_ERR
+//
+// This is set to 0 if we haven't initialized DPDK yet, 1 if we've
+// successfully initialized it, a negative value, which is the negative
+// of the rte_errno from rte_eal_init(), if we tried to initialize it
+// and got an error.
+//
+static int is_dpdk_pre_inited=0;
#define DPDK_LIB_NAME "libpcap_dpdk"
-#define DPDK_ARGC_MAX 64
+#define DPDK_DESC "Data Plane Development Kit (DPDK) Interface"
+#define DPDK_ERR_PERM_MSG "permission denied, DPDK needs root permission"
+#define DPDK_ARGC_MAX 64
#define DPDK_CFG_MAX_LEN 1024
+#define DPDK_DEV_NAME_MAX 32
+#define DPDK_DEV_DESC_MAX 512
#define DPDK_CFG_ENV_NAME "DPDK_CFG"
+#define DPDK_DEF_MIN_SLEEP_MS 1
static char dpdk_cfg_buf[DPDK_CFG_MAX_LEN];
+#define DPDK_MAC_ADDR_SIZE 32
+#define DPDK_DEF_MAC_ADDR "00:00:00:00:00:00"
#define DPDK_PCI_ADDR_SIZE 16
-#define DPDK_DEF_CFG "--log-level=debug -l0 -dlibrte_pmd_e1000.so -dlibrte_pmd_ixgbe.so -dlibrte_mempool_ring.so"
+#define DPDK_DEF_CFG "--log-level=error -l0 -dlibrte_pmd_e1000.so -dlibrte_pmd_ixgbe.so -dlibrte_mempool_ring.so"
#define DPDK_PREFIX "dpdk:"
+#define DPDK_PORTID_MAX 65535U
#define MBUF_POOL_NAME "mbuf_pool"
#define DPDK_TX_BUF_NAME "tx_buffer"
//The number of elements in the mbuf pool.
#define DPDK_NB_MBUFS 8192U
#define MEMPOOL_CACHE_SIZE 256
-#define MAX_PKT_BURST 32
+#define MAX_PKT_BURST 32
// Configurable number of RX/TX ring descriptors
#define RTE_TEST_RX_DESC_DEFAULT 1024
#define RTE_TEST_TX_DESC_DEFAULT 1024
struct pcap_dpdk{
pcap_t * orig;
uint16_t portid; // portid of DPDK
- pcap_handler cb; //callback and argument
- u_char *cb_arg;
- int max_cnt;
int must_clear_promisc;
- int filter_in_userland;
- uint64_t rx_pkts;
uint64_t bpf_drop;
- struct ether_addr eth_addr;
+ int nonblock;
+ struct timeval required_select_timeout;
struct timeval prev_ts;
struct rte_eth_stats prev_stats;
struct timeval curr_ts;
uint64_t bps;
struct rte_mempool * pktmbuf_pool;
struct dpdk_ts_helper ts_helper;
+ struct ether_addr eth_addr;
+ char mac_addr[DPDK_MAC_ADDR_SIZE];
char pci_addr[DPDK_PCI_ADDR_SIZE];
unsigned char pcap_tmp_buf[RTE_ETH_PCAP_SNAPLEN];
- volatile sig_atomic_t break_loop;
};
static struct rte_eth_conf port_conf = {
},
};
+static void dpdk_fmt_errmsg_for_rte_errno(char *, size_t, int,
+ PCAP_FORMAT_STRING(const char *), ...) PCAP_PRINTFLIKE(4, 5);
+
+/*
+ * Generate an error message based on a format, arguments, and an
+ * rte_errno, with a message for the rte_errno after the formatted output.
+ */
+static void dpdk_fmt_errmsg_for_rte_errno(char *errbuf, size_t errbuflen,
+ int errnum, const char *fmt, ...)
+{
+ va_list ap;
+ size_t msglen;
+ char *p;
+ size_t errbuflen_remaining;
+
+ va_start(ap, fmt);
+ vsnprintf(errbuf, errbuflen, fmt, ap);
+ va_end(ap);
+ msglen = strlen(errbuf);
+
+ /*
+ * Do we have enough space to append ": "?
+ * Including the terminating '\0', that's 3 bytes.
+ */
+ if (msglen + 3 > errbuflen) {
+ /* No - just give them what we've produced. */
+ return;
+ }
+ p = errbuf + msglen;
+ errbuflen_remaining = errbuflen - msglen;
+ *p++ = ':';
+ *p++ = ' ';
+ *p = '\0';
+ msglen += 2;
+ errbuflen_remaining -= 2;
+
+ /*
+ * Now append the string for the error code.
+ * rte_strerror() is thread-safe, at least as of dpdk 18.11,
+ * unlike strerror() - it uses strerror_r() rather than strerror()
+ * for UN*X errno values, and prints to what I assume is a per-thread
+ * buffer (based on the "PER_LCORE" in "RTE_DEFINE_PER_LCORE" used
+ * to declare the buffers statically) for DPDK errors.
+ */
+ snprintf(p, errbuflen_remaining, "%s", rte_strerror(errnum));
+}
+
static int dpdk_init_timer(struct pcap_dpdk *pd){
gettimeofday(&(pd->ts_helper.start_time),NULL);
pd->ts_helper.start_cycles = rte_get_timer_cycles();
pd->ts_helper.hz = rte_get_timer_hz();
if (pd->ts_helper.hz == 0){
- return -1;
+ return -1;
}
return 0;
}
timeradd(&(helper->start_time), &cur_time, ts);
}
-static unsigned int dpdk_gather_data(unsigned char *data, struct rte_mbuf *mbuf)
+static uint32_t dpdk_gather_data(unsigned char *data, int len, struct rte_mbuf *mbuf)
{
- unsigned int total_len = 0;
- while (mbuf && (total_len+mbuf->data_len) < RTE_ETH_PCAP_SNAPLEN ){
+ uint32_t total_len = 0;
+ while (mbuf && (total_len+mbuf->data_len) < len ){
rte_memcpy(data+total_len, rte_pktmbuf_mtod(mbuf,void *),mbuf->data_len);
total_len+=mbuf->data_len;
mbuf=mbuf->next;
return total_len;
}
-static void pcap_dpdk_breakloop(pcap_t *p)
-{
- pcap_breakloop_common(p);
+
+static int dpdk_read_with_timeout(pcap_t *p, uint16_t portid, struct rte_mbuf **pkts_burst, const uint16_t burst_cnt){
struct pcap_dpdk *pd = (struct pcap_dpdk*)(p->priv);
- pd->break_loop = p->break_loop;
+ int nb_rx = 0;
+ int timeout_ms = p->opt.timeout;
+ int sleep_ms = 0;
+ if (pd->nonblock){
+ // In non-blocking mode, just read once, no matter how many packets are captured.
+ nb_rx = (int)rte_eth_rx_burst(pd->portid, 0, pkts_burst, burst_cnt);
+ }else{
+ // In blocking mode, read many times until packets are captured or timeout or break_loop is setted.
+ // if timeout_ms == 0, it may be blocked forever.
+ while (timeout_ms == 0 || sleep_ms < timeout_ms){
+ nb_rx = (int)rte_eth_rx_burst(pd->portid, 0, pkts_burst, burst_cnt);
+ if (nb_rx){ // got packets within timeout_ms
+ break;
+ }else{ // no packet arrives at this round.
+ if (p->break_loop){
+ break;
+ }
+ // sleep for a very short while.
+ // block sleep is the only choice, since usleep() will impact performance dramatically.
+ rte_delay_us_block(DPDK_DEF_MIN_SLEEP_MS*1000);
+ sleep_ms += DPDK_DEF_MIN_SLEEP_MS;
+ }
+ }
+ }
+ return nb_rx;
}
-static void dpdk_dispatch_inter(void *dpdk_user)
+
+static int pcap_dpdk_dispatch(pcap_t *p, int max_cnt, pcap_handler cb, u_char *cb_arg)
{
- if (dpdk_user == NULL){
- return;
- }
- pcap_t *p = dpdk_user;
struct pcap_dpdk *pd = (struct pcap_dpdk*)(p->priv);
- int max_cnt = pd->max_cnt;
- pcap_handler cb = pd->cb;
- u_char *cb_arg = pd->cb_arg;
- int nb_rx=0;
+ int burst_cnt = 0;
+ int nb_rx = 0;
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
struct rte_mbuf *m;
struct pcap_pkthdr pcap_header;
uint16_t portid = pd->portid;
- unsigned lcore_id = rte_lcore_id();
- unsigned master_lcore_id = rte_get_master_lcore();
- uint16_t data_len = 0;
+ // In DPDK, pkt_len is sum of lengths for all segments. And data_len is for one segment
+ uint32_t pkt_len = 0;
+ uint32_t caplen = 0;
u_char *bp = NULL;
int i=0;
unsigned int gather_len =0;
int pkt_cnt = 0;
- int is_accepted=0;
-
- if(lcore_id == master_lcore_id){
- RTE_LOG(DEBUG, USER1, "dpdk: lcoreid=%u runs for portid=%u\n", lcore_id, portid);
+ u_char *large_buffer=NULL;
+ int timeout_ms = p->opt.timeout;
+
+ if ( !PACKET_COUNT_IS_UNLIMITED(max_cnt) && max_cnt < MAX_PKT_BURST){
+ burst_cnt = max_cnt;
}else{
- RTE_LOG(DEBUG, USER1, "dpdk: lcore %u has nothing to do\n", lcore_id);
+ burst_cnt = MAX_PKT_BURST;
}
- //only use master lcore
- if (lcore_id != master_lcore_id){
- return;
- }
- while( max_cnt==-1 || pkt_cnt < max_cnt){
- if (pd->break_loop){
+
+ while( PACKET_COUNT_IS_UNLIMITED(max_cnt) || pkt_cnt < max_cnt){
+ if (p->break_loop){
+ p->break_loop = 0;
+ return PCAP_ERROR_BREAK;
+ }
+ // read once in non-blocking mode, or try many times waiting for timeout_ms.
+ // if timeout_ms == 0, it will be blocked until one packet arrives or break_loop is setted.
+ nb_rx = dpdk_read_with_timeout(p, portid, pkts_burst, burst_cnt);
+ if (nb_rx == 0){
+ if (pd->nonblock){
+ RTE_LOG(DEBUG, USER1, "dpdk: no packets available in non-blocking mode.\n");
+ }else{
+ if (p->break_loop){
+ RTE_LOG(DEBUG, USER1, "dpdk: no packets available and break_loop is setted in blocking mode.\n");
+ p->break_loop = 0;
+ return PCAP_ERROR_BREAK;
+
+ }
+ RTE_LOG(DEBUG, USER1, "dpdk: no packets available for timeout %d ms in blocking mode.\n", timeout_ms);
+ }
+ // break if dpdk reads 0 packet, no matter in blocking(timeout) or non-blocking mode.
break;
}
- nb_rx = (int)rte_eth_rx_burst(portid, 0, pkts_burst, MAX_PKT_BURST);
pkt_cnt += nb_rx;
for ( i = 0; i < nb_rx; i++) {
m = pkts_burst[i];
calculate_timestamp(&(pd->ts_helper),&(pcap_header.ts));
- data_len = rte_pktmbuf_data_len(m);
- pcap_header.caplen = data_len;
- pcap_header.len = data_len;
+ pkt_len = rte_pktmbuf_pkt_len(m);
+ // caplen = min(pkt_len, p->snapshot);
+ // caplen will not be changed, no matter how long the rte_pktmbuf
+ caplen = pkt_len < (uint32_t)p->snapshot ? pkt_len: (uint32_t)p->snapshot;
+ pcap_header.caplen = caplen;
+ pcap_header.len = pkt_len;
// volatile prefetch
rte_prefetch0(rte_pktmbuf_mtod(m, void *));
bp = NULL;
{
bp = rte_pktmbuf_mtod(m, u_char *);
}else{
- if (m->pkt_len <= ETHER_MAX_JUMBO_FRAME_LEN)
+ // use fast buffer pcap_tmp_buf if pkt_len is small, no need to call malloc and free
+ if ( pkt_len <= ETHER_MAX_JUMBO_FRAME_LEN)
{
- gather_len = dpdk_gather_data(pd->pcap_tmp_buf, m);
+ gather_len = dpdk_gather_data(pd->pcap_tmp_buf, RTE_ETH_PCAP_SNAPLEN, m);
bp = pd->pcap_tmp_buf;
- pcap_header.caplen = gather_len;
- pcap_header.len = gather_len;
+ }else{
+ // need call free later
+ large_buffer = (u_char *)malloc(caplen*sizeof(u_char));
+ gather_len = dpdk_gather_data(large_buffer, caplen, m);
+ bp = large_buffer;
}
+
}
if (bp){
- //default accpet all
- is_accepted=1;
- if (pd->filter_in_userland && p->fcode.bf_insns!=NULL)
- {
- if (!pcap_filter(p->fcode.bf_insns, bp, pcap_header.len, pcap_header.caplen)){
- //rejected
- is_accepted=0;
- }
- }
- if (is_accepted){
+ if (p->fcode.bf_insns==NULL || pcap_filter(p->fcode.bf_insns, bp, pcap_header.len, pcap_header.caplen)){
cb(cb_arg, &pcap_header, bp);
}else{
pd->bpf_drop++;
}
//free all pktmbuf
rte_pktmbuf_free(m);
- }
- }
- pd->rx_pkts = pkt_cnt;
-}
-static int launch_one_lcore(void *dpdk_user)
-{
- dpdk_dispatch_inter(dpdk_user);
- return 0;
-}
-static int pcap_dpdk_dispatch(pcap_t *p, int max_cnt, pcap_handler cb, u_char *pcap_user)
-{
- unsigned lcore_id = 0;
- struct pcap_dpdk *pd = (struct pcap_dpdk*)(p->priv);
- pd->rx_pkts=0;
- pd->cb = cb;
- pd->cb_arg = pcap_user;
- pd->max_cnt = max_cnt;
- pd->orig = p;
- void *dpdk_user = p;
- // launch_one_lcore func will be called on every lcore include master core.
- rte_eal_mp_remote_launch(launch_one_lcore, dpdk_user, CALL_MASTER);
- RTE_LCORE_FOREACH_SLAVE(lcore_id) {
- if (rte_eal_wait_lcore(lcore_id) < 0) {
- break;
+ if (large_buffer){
+ free(large_buffer);
+ large_buffer=NULL;
+ }
}
}
- return pd->rx_pkts;
+ return pkt_cnt;
}
static int pcap_dpdk_inject(pcap_t *p, const void *buf _U_, int size _U_)
{
//not implemented yet
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: Inject function has not be implemented yet");
+ pcap_strlcpy(p->errbuf,
+ "dpdk error: Inject function has not been implemented yet",
+ PCAP_ERRBUF_SIZE);
return PCAP_ERROR;
}
if (pd==NULL)
{
return;
- }
+ }
if (pd->must_clear_promisc)
{
rte_eth_promiscuous_disable(pd->portid);
}
rte_eth_dev_stop(pd->portid);
rte_eth_dev_close(pd->portid);
- // free pcap_dpdk?
pcap_cleanup_live_common(p);
-}
-
-static int pcap_dpdk_setfilter(pcap_t *p, struct bpf_program *fp)
-{
- //init bpf for dpdk, only support userspace bfp
- struct pcap_dpdk * pd = p->priv;
- int ret=0;
- ret = install_bpf_program(p, fp);
- if (ret==0){
- pd->filter_in_userland = 1;
- }
- return ret;
}
static void nic_stats_display(struct pcap_dpdk *pd)
struct pcap_dpdk *pd = p->priv;
calculate_timestamp(&(pd->ts_helper), &(pd->curr_ts));
rte_eth_stats_get(pd->portid,&(pd->curr_stats));
-
- ps->ps_recv = pd->curr_stats.ipackets;
- ps->ps_drop = pd->curr_stats.ierrors;
- ps->ps_drop += pd->bpf_drop;
- ps->ps_ifdrop = pd->curr_stats.imissed;
-
+ if (ps){
+ ps->ps_recv = pd->curr_stats.ipackets;
+ ps->ps_drop = pd->curr_stats.ierrors;
+ ps->ps_drop += pd->bpf_drop;
+ ps->ps_ifdrop = pd->curr_stats.imissed;
+ }
uint64_t delta_pkt = pd->curr_stats.ipackets - pd->prev_stats.ipackets;
struct timeval delta_tm;
timersub(&(pd->curr_ts),&(pd->prev_ts), &delta_tm);
return 0;
}
-static int pcap_dpdk_setnonblock(pcap_t *p, int fd _U_){
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: setnonblock not support");
+static int pcap_dpdk_setnonblock(pcap_t *p, int nonblock){
+ struct pcap_dpdk *pd = (struct pcap_dpdk*)(p->priv);
+ pd->nonblock = nonblock;
return 0;
}
static int pcap_dpdk_getnonblock(pcap_t *p){
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: getnonblock not support");
- return 0;
+ struct pcap_dpdk *pd = (struct pcap_dpdk*)(p->priv);
+ return pd->nonblock;
}
-
static int check_link_status(uint16_t portid, struct rte_eth_link *plink)
{
- uint8_t count = 0;
- int is_port_up = 0;
- int max_check_time = 50;
- int check_interval = 100; // 100ms
- for (count = 0; count <= max_check_time; count++) {
- memset(plink, 0, sizeof(struct rte_eth_link));
- rte_eth_link_get_nowait(portid, plink);
- if (plink->link_status == ETH_LINK_UP)
+ // wait up to 9 seconds to get link status
+ rte_eth_link_get(portid, plink);
+ return plink->link_status == ETH_LINK_UP;
+}
+static void eth_addr_str(struct ether_addr *addrp, char* mac_str, int len)
+{
+ int offset=0;
+ if (addrp == NULL){
+ snprintf(mac_str, len-1, DPDK_DEF_MAC_ADDR);
+ return;
+ }
+ for (int i=0; i<6; i++)
+ {
+ if (offset >= len)
+ { // buffer overflow
+ return;
+ }
+ if (i==0)
{
- is_port_up = 1;
- break;
+ snprintf(mac_str+offset, len-1-offset, "%02X",addrp->addr_bytes[i]);
+ offset+=2; // FF
}else{
- rte_delay_ms(check_interval);
+ snprintf(mac_str+offset, len-1-offset, ":%02X", addrp->addr_bytes[i]);
+ offset+=3; // :FF
}
}
- return is_port_up;
+ return;
}
-
// return portid by device name, otherwise return -1
static uint16_t portid_by_device(char * device)
{
- uint16_t ret = -1;
+ uint16_t ret = DPDK_PORTID_MAX;
int len = strlen(device);
int prefix_len = strlen(DPDK_PREFIX);
unsigned long ret_ul = 0L;
-
+ char *pEnd;
if (len<=prefix_len || strncmp(device, DPDK_PREFIX, prefix_len)) // check prefix dpdk:
{
return ret;
}
- if (device[prefix_len]>='0' && device[prefix_len]<='9')
- { // is digital
- ret_ul = strtoul(&(device[prefix_len]), NULL, 10);
- ret = (uint16_t)ret_ul;
+ //check all chars are digital
+ for (int i=prefix_len; device[i]; i++){
+ if (device[i]<'0' || device[i]>'9'){
+ return ret;
+ }
+ }
+ ret_ul = strtoul(&(device[prefix_len]), &pEnd, 10);
+ if (pEnd == &(device[prefix_len]) || *pEnd != '\0'){
+ return ret;
+ }
+ // too large for portid
+ if (ret_ul >= DPDK_PORTID_MAX){
+ return ret;
}
+ ret = (uint16_t)ret_ul;
return ret;
}
static int parse_dpdk_cfg(char* dpdk_cfg,char** dargv)
{
int cnt=0;
- memset(dargv,0,sizeof(dargv[0])*DPDK_ARGC_MAX);
+ memset(dargv,0,sizeof(dargv[0])*DPDK_ARGC_MAX);
//current process name
int skip_space = 1;
int i=0;
// find first non space char
// The last opt is NULL
for (i=0;dpdk_cfg[i] && cnt<DPDK_ARGC_MAX-1;i++){
- if (skip_space && dpdk_cfg[i]!=0x20){ // not space
+ if (skip_space && dpdk_cfg[i]!=' '){ // not space
skip_space=!skip_space; // skip normal char
dargv[cnt++] = dpdk_cfg+i;
}
- if (!skip_space && dpdk_cfg[i]==0x20){ // fint a space
+ if (!skip_space && dpdk_cfg[i]==' '){ // fint a space
dpdk_cfg[i]=0x00; // end of this opt
skip_space=!skip_space; // skip space char
}
dargv[cnt]=NULL;
return cnt;
}
+
+// only called once
+// Returns:
+//
+// 1 on success;
+//
+// 0 if "the EAL cannot initialize on this system", which we treat as
+// meaning "DPDK isn't available";
+//
+// a PCAP_ERROR_ code for other errors.
+//
+// If eaccess_not_fatal is non-zero, treat "a permissions issue" the way
+// we treat "the EAL cannot initialize on this system". We use that
+// when trying to find DPDK devices, as we don't want to fail to return
+// *any* devices just because we can't support DPDK; when we're trying
+// to open a device, we need to return a permissions error in that case.
+static int dpdk_pre_init(char * ebuf, int eaccess_not_fatal)
+{
+ int dargv_cnt=0;
+ char *dargv[DPDK_ARGC_MAX];
+ char *ptr_dpdk_cfg = NULL;
+ int ret;
+ // globale var
+ if (is_dpdk_pre_inited != 0)
+ {
+ // already inited; did that succeed?
+ if (is_dpdk_pre_inited < 0)
+ {
+ // failed
+ goto error;
+ }
+ else
+ {
+ // succeeded
+ return 1;
+ }
+ }
+ // init EAL
+ ptr_dpdk_cfg = getenv(DPDK_CFG_ENV_NAME);
+ // set default log level to debug
+ rte_log_set_global_level(DPDK_DEF_LOG_LEV);
+ if (ptr_dpdk_cfg == NULL)
+ {
+ RTE_LOG(INFO,USER1,"env $DPDK_CFG is unset, so using default: %s\n",DPDK_DEF_CFG);
+ ptr_dpdk_cfg = DPDK_DEF_CFG;
+ }
+ memset(dpdk_cfg_buf,0,sizeof(dpdk_cfg_buf));
+ snprintf(dpdk_cfg_buf,DPDK_CFG_MAX_LEN-1,"%s %s",DPDK_LIB_NAME,ptr_dpdk_cfg);
+ dargv_cnt = parse_dpdk_cfg(dpdk_cfg_buf,dargv);
+ ret = rte_eal_init(dargv_cnt,dargv);
+ if (ret == -1)
+ {
+ // Indicate that we've called rte_eal_init() by setting
+ // is_dpdk_pre_inited to the negative of the error code,
+ // and process the error.
+ is_dpdk_pre_inited = -rte_errno;
+ goto error;
+ }
+ // init succeeded, so we do not need to do it again later.
+ is_dpdk_pre_inited = 1;
+ return 1;
+
+error:
+ switch (-is_dpdk_pre_inited)
+ {
+ case EACCES:
+ // This "indicates a permissions issue.".
+ RTE_LOG(ERR, USER1, "%s\n", DPDK_ERR_PERM_MSG);
+ // If we were told to treat this as just meaning
+ // DPDK isn't available, do so.
+ if (eaccess_not_fatal)
+ return 0;
+ // Otherwise report a fatal error.
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "DPDK requires that it run as root");
+ return PCAP_ERROR_PERM_DENIED;
+
+ case EAGAIN:
+ // This "indicates either a bus or system
+ // resource was not available, setup may
+ // be attempted again."
+ // There's no such error in pcap, so I'm
+ // not sure what we should do here.
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "Bus or system resource was not available");
+ break;
+
+ case EALREADY:
+ // This "indicates that the rte_eal_init
+ // function has already been called, and
+ // cannot be called again."
+ // That's not an error; set the "we've
+ // been here before" flag and return
+ // success.
+ is_dpdk_pre_inited = 1;
+ return 1;
+
+ case EFAULT:
+ // This "indicates the tailq configuration
+ // name was not found in memory configuration."
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "The tailq configuration name was not found in the memory configuration");
+ return PCAP_ERROR;
+
+ case EINVAL:
+ // This "indicates invalid parameters were
+ // passed as argv/argc." Those came from
+ // the configuration file.
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "The configuration file has invalid parameters");
+ break;
+
+ case ENOMEM:
+ // This "indicates failure likely caused by
+ // an out-of-memory condition."
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "Out of memory");
+ break;
+
+ case ENODEV:
+ // This "indicates memory setup issues."
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "An error occurred setting up memory");
+ break;
+
+ case ENOTSUP:
+ // This "indicates that the EAL cannot
+ // initialize on this system." We treat
+ // that as meaning DPDK isn't available
+ // on this machine, rather than as a
+ // fatal error, and let our caller decide
+ // whether that's a fatal error (if trying
+ // to activate a DPDK device) or not (if
+ // trying to enumerate devices).
+ return 0;
+
+ case EPROTO:
+ // This "indicates that the PCI bus is
+ // either not present, or is not readable
+ // by the eal." Does "the PCI bus is not
+ // present" mean "this machine has no PCI
+ // bus", which strikes me as a "not available"
+ // case? If so, should "is not readable by
+ // the EAL" also something we should treat
+ // as a "not available" case? If not, we
+ // can't distinguish between the two, so
+ // we're stuck.
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "PCI bus is not present or not readable by the EAL");
+ break;
+
+ case ENOEXEC:
+ // This "indicates that a service core
+ // failed to launch successfully."
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "A service core failed to launch successfully");
+ break;
+
+ default:
+ //
+ // That's not in the list of errors in
+ // the documentation; let it be reported
+ // as an error.
+ //
+ dpdk_fmt_errmsg_for_rte_errno(ebuf,
+ PCAP_ERRBUF_SIZE, -is_dpdk_pre_inited,
+ "dpdk error: dpdk_pre_init failed");
+ break;
+ }
+ // Error.
+ return PCAP_ERROR;
+}
+
static int pcap_dpdk_activate(pcap_t *p)
{
struct pcap_dpdk *pd = p->priv;
pd->orig = p;
int ret = PCAP_ERROR;
uint16_t nb_ports=0;
- uint16_t portid=-1;
+ uint16_t portid= DPDK_PORTID_MAX;
unsigned nb_mbufs = DPDK_NB_MBUFS;
struct rte_eth_rxconf rxq_conf;
struct rte_eth_txconf txq_conf;
struct rte_eth_dev_info dev_info;
int is_port_up = 0;
struct rte_eth_link link;
- if (p == NULL)
- {
- return PCAP_ERROR;
- }
-
do{
- //init EAL
- rte_log_set_global_level(RTE_LOG_DEBUG);
- int dargv_cnt=0;
- char * dargv[DPDK_ARGC_MAX];
- char *ptr_dpdk_cfg = getenv(DPDK_CFG_ENV_NAME);
- if (ptr_dpdk_cfg == NULL)
+ //init EAL; fail if we have insufficient permission
+ char dpdk_pre_init_errbuf[PCAP_ERRBUF_SIZE];
+ ret = dpdk_pre_init(dpdk_pre_init_errbuf, 0);
+ if (ret < 0)
{
- RTE_LOG(INFO,USER1,"env $DPDK_CFG is unset, so using default: %s\n",DPDK_DEF_CFG);
- ptr_dpdk_cfg = DPDK_DEF_CFG;
+ // This returns a negative value on an error.
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't open device %s: %s",
+ p->opt.device, dpdk_pre_init_errbuf);
+ // ret is set to the correct error
+ break;
}
- memset(dpdk_cfg_buf,0,sizeof(dpdk_cfg_buf));
- snprintf(dpdk_cfg_buf,DPDK_CFG_MAX_LEN-1,"%s %s",DPDK_LIB_NAME,ptr_dpdk_cfg);
- dargv_cnt = parse_dpdk_cfg(dpdk_cfg_buf,dargv);
- ret = rte_eal_init(dargv_cnt,dargv);
- if (ret < 0)
+ if (ret == 0)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: Init failed with device %s",
+ // This means DPDK isn't available on this machine.
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't open device %s: DPDK is not available on this machine",
p->opt.device);
- ret = PCAP_ERROR;
- break;
+ return PCAP_ERROR_NO_SUCH_DEVICE;
}
+
ret = dpdk_init_timer(pd);
if (ret<0)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: Init timer error with device %s",
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "dpdk error: Init timer is zero with device %s",
p->opt.device);
ret = PCAP_ERROR;
break;
nb_ports = rte_eth_dev_count_avail();
if (nb_ports == 0)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: No Ethernet ports");
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "dpdk error: No Ethernet ports");
ret = PCAP_ERROR;
break;
}
- // parse portid
+
portid = portid_by_device(p->opt.device);
- if (portid == -1){
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: portid is invalid. device %s",
+ if (portid == DPDK_PORTID_MAX){
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "dpdk error: portid is invalid. device %s",
p->opt.device);
- ret = PCAP_ERROR;
+ ret = PCAP_ERROR_NO_SUCH_DEVICE;
break;
}
- if (portid >= nb_ports)
- {
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: portid(%u) is larger than nb_ports(%u)",
- portid, nb_ports);
- ret = PCAP_ERROR;
- break;
- }
pd->portid = portid;
+
if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
{
p->snapshot = MAXIMUM_SNAPLEN;
}
- // create the mbuf pool
+ // create the mbuf pool
pd->pktmbuf_pool = rte_pktmbuf_pool_create(MBUF_POOL_NAME, nb_mbufs,
MEMPOOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
rte_socket_id());
if (pd->pktmbuf_pool == NULL)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: Cannot init mbuf pool");
+ dpdk_fmt_errmsg_for_rte_errno(p->errbuf,
+ PCAP_ERRBUF_SIZE, rte_errno,
+ "dpdk error: Cannot init mbuf pool");
ret = PCAP_ERROR;
break;
}
ret = rte_eth_dev_configure(portid, 1, 1, &local_port_conf);
if (ret < 0)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: Cannot configure device: err=%d, port=%u",
- ret, portid);
+ dpdk_fmt_errmsg_for_rte_errno(p->errbuf,
+ PCAP_ERRBUF_SIZE, -ret,
+ "dpdk error: Cannot configure device: port=%u",
+ portid);
ret = PCAP_ERROR;
- break;
+ break;
}
// adjust rx tx
ret = rte_eth_dev_adjust_nb_rx_tx_desc(portid, &nb_rxd, &nb_txd);
if (ret < 0)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: Cannot adjust number of descriptors: err=%d, port=%u",
- ret, portid);
+ dpdk_fmt_errmsg_for_rte_errno(p->errbuf,
+ PCAP_ERRBUF_SIZE, -ret,
+ "dpdk error: Cannot adjust number of descriptors: port=%u",
+ portid);
ret = PCAP_ERROR;
- break;
+ break;
}
// get MAC addr
rte_eth_macaddr_get(portid, &(pd->eth_addr));
+ eth_addr_str(&(pd->eth_addr), pd->mac_addr, DPDK_MAC_ADDR_SIZE-1);
// init one RX queue
rxq_conf = dev_info.default_rxconf;
pd->pktmbuf_pool);
if (ret < 0)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: rte_eth_rx_queue_setup:err=%d, port=%u",
- ret, portid);
+ dpdk_fmt_errmsg_for_rte_errno(p->errbuf,
+ PCAP_ERRBUF_SIZE, -ret,
+ "dpdk error: rte_eth_rx_queue_setup:port=%u",
+ portid);
ret = PCAP_ERROR;
- break;
+ break;
}
- // init one TX queue
+ // init one TX queue
txq_conf = dev_info.default_txconf;
txq_conf.offloads = local_port_conf.txmode.offloads;
ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
&txq_conf);
if (ret < 0)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: rte_eth_tx_queue_setup:err=%d, port=%u",
- ret, portid);
+ dpdk_fmt_errmsg_for_rte_errno(p->errbuf,
+ PCAP_ERRBUF_SIZE, -ret,
+ "dpdk error: rte_eth_tx_queue_setup:port=%u",
+ portid);
ret = PCAP_ERROR;
- break;
+ break;
}
- // Initialize TX buffers
+ // Initialize TX buffers
tx_buffer = rte_zmalloc_socket(DPDK_TX_BUF_NAME,
RTE_ETH_TX_BUFFER_SIZE(MAX_PKT_BURST), 0,
rte_eth_dev_socket_id(portid));
if (tx_buffer == NULL)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: Cannot allocate buffer for tx on port %u", portid);
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "dpdk error: Cannot allocate buffer for tx on port %u", portid);
ret = PCAP_ERROR;
- break;
+ break;
}
rte_eth_tx_buffer_init(tx_buffer, MAX_PKT_BURST);
// Start device
ret = rte_eth_dev_start(portid);
if (ret < 0)
{
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: rte_eth_dev_start:err=%d, port=%u",
- ret, portid);
+ dpdk_fmt_errmsg_for_rte_errno(p->errbuf,
+ PCAP_ERRBUF_SIZE, -ret,
+ "dpdk error: rte_eth_dev_start:port=%u",
+ portid);
ret = PCAP_ERROR;
break;
}
- // set promisc mode
- pd->must_clear_promisc=1;
- rte_eth_promiscuous_enable(portid);
+ // set promiscuous mode
+ if (p->opt.promisc){
+ pd->must_clear_promisc=1;
+ rte_eth_promiscuous_enable(portid);
+ }
// check link status
is_port_up = check_link_status(portid, &link);
if (!is_port_up){
- pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
- errno, "dpdk error: link is down, port=%u",portid);
- ret = PCAP_ERROR;
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "dpdk error: link is down, port=%u",portid);
+ ret = PCAP_ERROR_IFACE_NOT_UP;
break;
}
// reset statistics
rte_eth_stats_reset(pd->portid);
calculate_timestamp(&(pd->ts_helper), &(pd->prev_ts));
- rte_eth_stats_get(pd->portid,&(pd->prev_stats));
- // format pcap_t
+ rte_eth_stats_get(pd->portid,&(pd->prev_stats));
+ // format pcap_t
pd->portid = portid;
- p->fd = pd->portid;
+ p->fd = pd->portid;
if (p->snapshot <=0 || p->snapshot> MAXIMUM_SNAPLEN)
{
p->snapshot = MAXIMUM_SNAPLEN;
p->selectable_fd = p->fd;
p->read_op = pcap_dpdk_dispatch;
p->inject_op = pcap_dpdk_inject;
- p->setfilter_op = pcap_dpdk_setfilter;
+ // using pcap_filter currently, though DPDK provides their own BPF function. Because DPDK BPF needs load a ELF file as a filter.
+ p->setfilter_op = install_bpf_program;
p->setdirection_op = NULL;
p->set_datalink_op = NULL;
p->getnonblock_op = pcap_dpdk_getnonblock;
p->setnonblock_op = pcap_dpdk_setnonblock;
p->stats_op = pcap_dpdk_stats;
p->cleanup_op = pcap_dpdk_close;
- p->breakloop_op = pcap_dpdk_breakloop;
+ p->breakloop_op = pcap_breakloop_common;
+ // set default timeout
+ pd->required_select_timeout.tv_sec = 0;
+ pd->required_select_timeout.tv_usec = DPDK_DEF_MIN_SLEEP_MS*1000;
+ p->required_select_timeout = &pd->required_select_timeout;
ret = 0; // OK
}while(0);
- rte_eth_dev_get_name_by_port(portid,pd->pci_addr);
- RTE_LOG(INFO, USER1,"%s device %s portid %d, pci_addr: %s\n", __FUNCTION__, p->opt.device, portid, pd->pci_addr);
- RTE_LOG(INFO, USER1,"Port %d Link Up. Speed %u Mbps - %s\n",
- portid, link.link_speed,
- (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
- ("full-duplex") : ("half-duplex\n"));
- RTE_LOG(INFO, USER1,"Port %u, MAC address:", portid);
- for (int i=0; i<6; i++)
- {
- if (i==0)
- {
- fprintf(stderr,"%02X",pd->eth_addr.addr_bytes[i]);
- }else{
- fprintf(stderr,":%02X", pd->eth_addr.addr_bytes[i]);
- }
- }
- fprintf(stderr,"\n\n");
- if (ret == PCAP_ERROR)
+
+ if (ret <= PCAP_ERROR) // all kinds of error code
{
pcap_cleanup_live_common(p);
+ }else{
+ rte_eth_dev_get_name_by_port(portid,pd->pci_addr);
+ RTE_LOG(INFO, USER1,"Port %d device: %s, MAC:%s, PCI:%s\n", portid, p->opt.device, pd->mac_addr, pd->pci_addr);
+ RTE_LOG(INFO, USER1,"Port %d Link Up. Speed %u Mbps - %s\n",
+ portid, link.link_speed,
+ (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
+ ("full-duplex") : ("half-duplex\n"));
}
return ret;
}
return NULL;
//memset will happen
p = pcap_create_common(ebuf, sizeof(struct pcap_dpdk));
-
+
if (p == NULL)
return NULL;
p->activate_op = pcap_dpdk_activate;
return p;
}
-int pcap_dpdk_findalldevs(pcap_if_list_t *devlistp _U_, char *err_str _U_)
+int pcap_dpdk_findalldevs(pcap_if_list_t *devlistp, char *ebuf)
{
- return 0;
+ int ret=0;
+ unsigned int nb_ports = 0;
+ char dpdk_name[DPDK_DEV_NAME_MAX];
+ char dpdk_desc[DPDK_DEV_DESC_MAX];
+ struct ether_addr eth_addr;
+ char mac_addr[DPDK_MAC_ADDR_SIZE];
+ char pci_addr[DPDK_PCI_ADDR_SIZE];
+ do{
+ // init EAL; return "DPDK not available" if we
+ // have insufficient permission
+ char dpdk_pre_init_errbuf[PCAP_ERRBUF_SIZE];
+ ret = dpdk_pre_init(dpdk_pre_init_errbuf, 1);
+ if (ret < 0)
+ {
+ // This returns a negative value on an error.
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "Can't look for DPDK devices: %s",
+ dpdk_pre_init_errbuf);
+ ret = PCAP_ERROR;
+ break;
+ }
+ if (ret == 0)
+ {
+ // This means DPDK isn't available on this machine.
+ // That just means "don't return any devices".
+ break;
+ }
+ nb_ports = rte_eth_dev_count_avail();
+ if (nb_ports == 0)
+ {
+ // That just means "don't return any devices".
+ ret = 0;
+ break;
+ }
+ for (unsigned int i=0; i<nb_ports; i++){
+ snprintf(dpdk_name, DPDK_DEV_NAME_MAX-1,
+ "%s%u", DPDK_PREFIX, i);
+ // mac addr
+ rte_eth_macaddr_get(i, ð_addr);
+ eth_addr_str(ð_addr,mac_addr,DPDK_MAC_ADDR_SIZE);
+ // PCI addr
+ rte_eth_dev_get_name_by_port(i,pci_addr);
+ snprintf(dpdk_desc,DPDK_DEV_DESC_MAX-1,"%s %s, MAC:%s, PCI:%s", DPDK_DESC, dpdk_name, mac_addr, pci_addr);
+ if (add_dev(devlistp, dpdk_name, 0, dpdk_desc, ebuf)==NULL){
+ ret = PCAP_ERROR;
+ break;
+ }
+ }
+ }while(0);
+ return ret;
+}
+
+#ifdef DPDK_ONLY
+/*
+ * This libpcap build supports only DPDK, not regular network interfaces.
+ */
+
+/*
+ * There are no regular interfaces, just DPDK interfaces.
+ */
+int
+pcap_platform_finddevs(pcap_if_list_t *devlistp _U_, char *errbuf)
+{
+ return (0);
}
+
+/*
+ * Attempts to open a regular interface fail.
+ */
+pcap_t *
+pcap_create_interface(const char *device, char *errbuf)
+{
+ snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "This version of libpcap only supports DPDK");
+ return NULL;
+}
+
+/*
+ * Libpcap version string.
+ */
+const char *
+pcap_lib_version(void)
+{
+ return (PCAP_VERSION_STRING " (DPDK-only)");
+}
+#endif
projects / libpcap / blobdiff