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f2k.c
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/*
Copyright (C) 2016 Eneo Tecnologia S.L.
Author: Eugenio Perez <[email protected]>
Based on Luca Deri nprobe 6.22 collector
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "rb_kafka.h"
#include "rb_zk.h"
#include "rb_sensor.h"
#ifdef HAVE_UDNS
#include "rb_dns_cache.h"
#endif
#include "jansson.h"
#include "f2k.h"
#include <net/ethernet.h>
#include <pwd.h>
#include <syslog.h>
/* *************************************** */
static void initDefaults(void);
/* *********** Globals ******************* */
#ifdef HAVE_PF_RING
#include "pro/pf_ring.c"
#endif
/* *************************************** */
/* BSD AF_ values. */
#define BSD_AF_INET 2
#define BSD_AF_INET6_BSD 24 /* OpenBSD (and probably NetBSD), BSD/OS */
#define BSD_AF_INET6_FREEBSD 28
#define BSD_AF_INET6_DARWIN 30
#ifndef DLT_ANY
#define DLT_ANY 113
#endif
#ifndef ETHERTYPE_IP
#define ETHERTYPE_IP 0x0800 /* IP protocol */
#endif
#ifndef ETHERTYPE_IPV6
#define ETHERTYPE_IPV6 0x86DD /* IPv6 protocol */
#endif
#ifndef ETHERTYPE_MPLS
#define ETHERTYPE_MPLS 0x8847 /* MPLS protocol */
#endif
#ifndef ETHERTYPE_PPPoE
#define ETHERTYPE_PPPoE 0x8864 /* PPP over Ethernet */
#endif
#ifndef ETHERTYPE_VLAN
#define ETHERTYPE_VLAN 0x08100
#endif
#define TRANSPORT_UDP 1
#define TRANSPORT_TCP 2
#define TRANSPORT_SCTP 3
#ifndef IPPROTO_SCTP
#define IPPROTO_SCTP 132
#endif
/* ****************************************************** */
/* Forward */
static int parseOptions(int argc, char* argv[], const bool reparse_options);
static int argc_;
static char **argv_;
#ifdef HAVE_OPTRESET
extern int optreset; /* defined by BSD, but not others */
#endif
typedef void *(*pthread_start_routine)(void*);
static const struct option long_options[] = {
{ "as-list", required_argument, NULL, 'A' },
{ "verbose", required_argument, NULL, 'b' },
{ "pid-file", required_argument, NULL, 'g' },
{ "daemon-mode", no_argument, NULL, 'G' },
{ "help", no_argument, NULL, 'h' },
{ "hosts-path", required_argument, NULL, 256 },
{ "template-cache", required_argument, NULL, 257 },
{ "rb-config", required_argument, NULL, 258 },
{ "separate-long-flows", no_argument, NULL, 260 },
{ "normalize-directions", no_argument, NULL, 'n' },
{ "interface", required_argument, NULL, 'i' },
{ "syslog", required_argument, NULL, 'I' },
{ "num-threads", required_argument, NULL, 'O' },
{ "snaplen", required_argument, NULL, 's' },
{ "sample-rate", required_argument, NULL, 'S' },
{ "version", no_argument, NULL, 'v' },
#ifdef HAVE_PF_RING
{ "cluster-id", required_argument, NULL, 'Z' },
#endif
{ "count", required_argument, NULL, '2' },
{ "collector-port", required_argument, NULL, '3' },
#ifdef linux
{ "cpu-affinity", required_argument, NULL, '4' },
#endif
/* Handled by the plugin */
{ "no-promisc", no_argument, NULL, '6' },
{ "pcap-file-list", required_argument, NULL, '$' },
{ "country-list", required_argument, NULL, 259 },
/* Some identifiers are available */
{ "dont-drop-privileges", no_argument, NULL, '\\' },
{ "event-log", required_argument, NULL, '+' },
#ifdef HAVE_LIBRDKAFKA
{ "kafka", required_argument, NULL, 229 },
{ "kafka-netflow-consumer", required_argument, NULL, 230 },
{ "kafka-discarder", required_argument, NULL, 231 },
{ "rdkafka-opt", required_argument, NULL, 'X' },
{ "rdkafka-netflow-consumer-opt", required_argument, NULL, 'Y' },
{ "use-kafka-random-partitioner", no_argument, NULL, 'p' },
#endif
#ifdef HAVE_ZOOKEEPER
{ "zk-host", required_argument, NULL, 'z' },
{ "zk-timeout", required_argument, NULL, 262 },
#endif
{ "dont-reforge-timestamps", no_argument, NULL, 235 },
{ "original-speed", no_argument, NULL, 237 },
{ "unprivileged-user", required_argument, NULL, 244 },
{ "performance", no_argument, NULL, 248 },
{ "mac-vendor-list", required_argument, NULL, 249 },
{ "debug", no_argument, NULL, 254 },
{ "dont-reforge-far-timestamp", no_argument, NULL, 261 },
#ifdef HAVE_UDNS
{ "enable-ptr-dns", no_argument, NULL, 'd'},
{ "dns-cache-size-mb", required_argument, NULL, 'c'},
{ "dns-cache-timeout-s", required_argument, NULL, 't'},
#endif
/* End of probe options */
{ NULL, no_argument, NULL, 0 }
};
/* ****************************************************** */
static uint32_t printPcapStats(pcap_t *pcapPtr) {
struct pcap_stat pcapStat;
if(pcap_stats(pcapPtr, &pcapStat) >= 0) {
uint64_t rcvd_diff, drop_diff;
char msg[256];
/* Some pcap implementations reset the stats at each call */
if(pcapStat.ps_recv >= readWriteGlobals->last_ps_recv) {
rcvd_diff = pcapStat.ps_recv - readWriteGlobals->last_ps_recv;
drop_diff = pcapStat.ps_drop - readWriteGlobals->last_ps_drop;
} else {
rcvd_diff = pcapStat.ps_recv, drop_diff = pcapStat.ps_drop;
}
/* traceEvent(TRACE_ERROR, "[%u][%u]\n", pcapStat.ps_recv, pcapStat.ps_drop); */
snprintf(msg, sizeof(msg), "Packet stats (pcap): "
"%u/%u pkts rcvd/dropped [%.1f%%] [Last %lu/%lu pkts rcvd/dropped]",
pcapStat.ps_recv, pcapStat.ps_drop,
(pcapStat.ps_recv > 0) ? ((float)(pcapStat.ps_drop*100)/(float)pcapStat.ps_recv) : 0,
rcvd_diff, drop_diff);
// traceEvent(TRACE_INFO, "%s", msg);
if(readWriteGlobals->shutdownInProgress && (pcapStat.ps_drop > 0)) {
snprintf(msg, sizeof(msg), "Final capture stats (pcap): "
"%u/%u pkts rcvd/dropped [%.1f%%]",
pcapStat.ps_recv, pcapStat.ps_drop,
(pcapStat.ps_recv > 0) ? ((float)(pcapStat.ps_drop*100)/(float)pcapStat.ps_recv) : 0);
dumpLogEvent(packet_drop, severity_warning, msg);
}
readWriteGlobals->last_ps_recv = pcapStat.ps_recv, readWriteGlobals->last_ps_drop = pcapStat.ps_drop;
return(drop_diff);
} else {
#ifdef DEBUG
traceEvent(TRACE_WARNING, "Unable to read pcap statistics: %s",
pcap_geterr(pcapPtr));
#endif
return(0 /* drop_diff */);
}
}
/* ****************************************************** */
/* Return the number of dropped packets since last call */
static uint32_t printCaptureStats() {
#ifdef HAVE_PF_RING
if(!readWriteGlobals->stopPacketCapture)
return(printPfRingStats(dump_stats_on_screen));
#else
if(readOnlyGlobals.pcapPtr != NULL)
return(printPcapStats(readOnlyGlobals.pcapPtr));
#endif
else
return(0);
}
/* ****************************************************** */
static void reloadCLI(int signo) {
traceEvent(TRACE_NORMAL, "Received signal %d: reloading CLI options", signo);
static int reloadingCli = 0;
if(reloadingCli++)
return;
parseOptions(argc_, argv_, 1);
reloadingCli=0;
}
/* ****************************************************** */
static void cleanup(int signo __attribute__((unused))) {
static bool statsPrinted = false;
if(!readOnlyGlobals.f2k_up) exit(0);
if(!statsPrinted) {
statsPrinted = true;
printCaptureStats();
}
readOnlyGlobals.f2k_up = 0;
readWriteGlobals->shutdownInProgress = 1;
traceEvent(TRACE_NORMAL, "Received shutdown request...");
/* shutdown_f2k(); */
/* exit(0); */
}
/* ****************************************************** */
static void brokenPipe(int signo __attribute__((unused))) {
#ifdef DEBUG
traceEvent(TRACE_WARNING, "Broken pipe (socket %d closed) ?\n", currSock);
#endif
signal(SIGPIPE, brokenPipe);
}
/* ****************************************************** */
static int isFlowPort(const uint16_t port){
switch(port){
case 2055:
case 2057:
case 6343:
case 9999:
case 3000:
case 6000:
case 9996:
case 15003:
return 1;
default:
return 0;
}
}
static uint16_t _eth_type(const struct ether_header *ehdr){
uint32_t null_type;
switch(readOnlyGlobals.datalink) {
case DLT_ANY: /* Linux 'any' device */
return DLT_ANY;
case DLT_RAW: /* Raw packet data */
if(((((const uint8_t *)ehdr)[0] & 0xF0) >> 4) == 4)
return ETHERTYPE_IP;
else
return ETHERTYPE_IPV6;
break;
case DLT_NULL: /* loopaback interface */
memcpy(&null_type, ehdr, sizeof(uint32_t));
//null_type = ntohl(null_type);
/* All this crap is due to the old little/big endian story... */
/* FIX !!!! */
switch(null_type) {
case BSD_AF_INET:
return ETHERTYPE_IP;
case BSD_AF_INET6_BSD:
case BSD_AF_INET6_FREEBSD:
case BSD_AF_INET6_DARWIN:
return ETHERTYPE_IPV6;
default:
return DLT_NULL; /* Any other non IP protocol */
}
break;
case DLT_PPP:
break;
default:
assert(ehdr);
return ntohs(ehdr->ether_type);
break;
};
traceEvent(TRACE_WARNING,"Cannot find eth type");
return 0;
}
static size_t _eth_shift(){
switch(readOnlyGlobals.datalink) {
case DLT_RAW: /* Raw packet data */
return 0;
case DLT_NULL: /* loopaback interface */
return 4;
case DLT_PPP:
return 0;
default:
return sizeof(struct eth_header);
};
}
// @TODO test fragment management
static void deepPacketDecode(u_short thread_id __attribute__((unused)),
struct pcap_pkthdr *h, QueuedPacket *qpacket) {
size_t caplen = h->caplen, length = h->len, offset = 0;
uint8_t proto = 0;
uint16_t payload_shift = 0;
int payloadLen = 0; /* Do not set it to unsigned */
IpAddress src;
u_short isFragmentedPacket = 0;
ticks when=0;
#ifdef DEBUG
traceEvent(TRACE_INFO, ".");
#endif
// dumpPacket(h, p);
#if 0
if(h->ts.tv_sec > (time(NULL)+1)) {
traceEvent(TRACE_WARNING, "BAD time: h->ts.tv_sec=%u/time=%u",
(unsigned int)h->ts.tv_sec,
(unsigned int)time(NULL));
}
#endif
if(unlikely(readOnlyGlobals.tracePerformance))
when = getticks();
if(unlikely(readWriteGlobals->stopPacketCapture))
return;
if(unlikely(caplen < sizeof(struct eth_header))){
traceEvent(TRACE_ERROR,"caplen < sizeof(struct eth_header");
return;
}
size_t plen, hlen = 0, ip_len = 0;
const uint16_t eth_type = _eth_type((const struct ether_header *)qpacket->buffer);
const size_t ehshift = _eth_shift();
switch(eth_type) {
case ETHERTYPE_VLAN:
traceEvent(TRACE_WARNING, "Does not processing VLAN packets.");
return;
case ETHERTYPE_MPLS:
traceEvent(TRACE_WARNING, "Does not processing MPLS packets.");
return;
case DLT_ANY:
traceEvent(TRACE_WARNING, "Does not processing ANY packets (use -i in tcpdump)");
return;
case DLT_NULL:
traceEvent(TRACE_WARNING, "Cannot find any IPv4/IPv6 packets in LO interface");
return;
case ETHERTYPE_PPPoE:
traceEvent(TRACE_WARNING, "Does not processing PPPoE packets");
return;
case ETHERTYPE_IP:
case ETHERTYPE_IPV6:
{
size_t estimatedLen = 0;
if(likely(eth_type == ETHERTYPE_IP)) {
const struct ip *ip = (struct ip*)(qpacket->buffer+ehshift);
if(ip->ip_v != 4) return; /* IP v4 only */
const size_t ip_ip_len = htons(ip->ip_len);
ip_len = ((size_t)ip->ip_hl * 4);
estimatedLen = ehshift + ip_ip_len;
hlen = ip_len;
payloadLen = htons(ip->ip_len)-ip_len;
if(length < h->caplen)
h->caplen = length;
src.ipVersion = 4;
src.ipType.ipv4 = ntohl(ip->ip_src.s_addr);
proto = ip->ip_p;
const size_t off = ntohs(ip->ip_off) & 0x1fff;
const size_t more_fragments = ntohs(ip->ip_off) & 0x2000;
isFragmentedPacket = off || more_fragments ? 1 : 0;
}else if(unlikely(eth_type == ETHERTYPE_IPV6)) {
struct ip6_hdr *ipv6 = NULL;
struct ip6_ext *ipv6ext = NULL;
size_t ipv6_ip_len;
ipv6 = (struct ip6_hdr*)(qpacket->buffer+ehshift);
if(((ipv6->ip6_vfc >> 4) & 0x0f) != 6) return; /* IP v6 only */
ipv6_ip_len = htons(ipv6->ip6_plen);
estimatedLen = sizeof(struct ip6_hdr)+ehshift+ipv6_ip_len;
hlen = sizeof(struct ip6_hdr);
src.ipVersion = 6;
proto = ipv6->ip6_nxt; /* next header (protocol) */
payloadLen = h->caplen - ehshift - hlen;
/* FIX: blacklist check for IPv6 */
/* FIX: isLocalAddress doesn't work with IPv6 */
memcpy(&src.ipType.ipv6, &ipv6->ip6_src, sizeof(struct in6_addr));
if(proto == 0) {
/* IPv6 hop-by-hop option */
ipv6ext = (struct ip6_ext*)(qpacket->buffer+ehshift+40);
hlen += (ipv6ext->ip6e_len+1)*8;
proto = ipv6ext->ip6e_nxt;
}
} else {
traceEvent(TRACE_WARNING,"Not processing non IPv4/IPv6 packet");
return; /* Anything else that's not IPv4/v6 */
}
plen = length-ehshift;
if(caplen > estimatedLen) caplen = estimatedLen;
payloadLen -= (estimatedLen-caplen);
offset = ehshift+hlen;
}
break;
default:
if((eth_type != 0) && (eth_type < 1500) /* Max 802.3 lenght */) {
traceEvent(TRACE_WARNING, "We don't process 802.3 packets");
} else {
#ifdef DEBUG
traceEvent(TRACE_WARNING, "Unknown ethernet type: 0x%X (%d)", eth_type, eth_type);
#endif
}
break;
}
if(likely(proto==IPPROTO_UDP)){
struct udphdr *up;
if(unlikely(plen < (hlen+sizeof(struct udphdr)))) return; /* packet too short */
up = (struct udphdr*)(qpacket->buffer+offset);
const uint16_t dport = ntohs(up->uh_dport);
if(likely(payloadLen > 0))
payload_shift = offset+sizeof(struct udphdr);
else {
payloadLen = 0;
payload_shift = 0;
}
if(likely((payloadLen > 0) && (isFlowPort(dport))
&& (isFragmentedPacket == 0) /* Do not process fragmented packets */)) {
/* traceEvent(TRACE_NORMAL, "Dissecting flow packets (%d bytes)", payloadLen); */
#if 0
int begin = 70;
traceEvent(TRACE_NORMAL, "%02X %02X %02X %02X %02X %02X",
p[payload_shift+begin] & 0xFF, p[payload_shift+begin+1] & 0xFF,
p[payload_shift+begin+2] & 0xFF, p[payload_shift+begin+3] & 0xFF,
p[payload_shift+begin+4] & 0xFF, p[payload_shift+begin+5] & 0xFF);
#endif
if(unlikely(dport == 6343 /* sFlow (we hope) */)) {
//struct sockaddr_in fromHostV4;
//dissectSflow((char*)&p[payload_shift], payloadLen, &fromHostV4); /* sFlow */
} else{
struct sensor *sensor_object = get_sensor(
readOnlyGlobals.rb_databases.sensors_info, src.ipType.ipv4);
if(NULL==sensor_object) {
const size_t bufsize = 1024;
char buf[bufsize];
const int bad_sensor_added = addBadSensor(
readOnlyGlobals.rb_databases.sensors_info, src.ipType.ipv4);
if(bad_sensor_added)
traceEvent(TRACE_WARNING,"received a packet from the unknow sensor %s on port %u.",
_intoaV4(src.ipType.ipv4,buf,bufsize), dport);
freeQueuedPacket(qpacket);
} else {
qpacket->netflow_device_ip = src.ipType.ipv4;
qpacket->buffer += payload_shift;
qpacket->buffer_len = payloadLen - sizeof(struct udphdr);
qpacket->sensor = sensor_object;
worker_t *worker = sensor_worker(sensor_object);
add_packet_to_worker(qpacket, worker);
}
}
return;
}
}else{
traceEvent(TRACE_WARNING,"Not processing non-UDP packets");
}
if(unlikely(readOnlyGlobals.tracePerformance)) {
ticks diff = getticks() - when;
pthread_rwlock_wrlock(&readOnlyGlobals.ticksLock);
readOnlyGlobals.decodeTicks += diff;
pthread_rwlock_unlock(&readOnlyGlobals.ticksLock);
}
}
/* ****************************************************** */
static void decodePacket(u_short thread_id,
struct pcap_pkthdr *h, QueuedPacket *qpacket) {
/* Sanity check */
if(unlikely((h->ts.tv_sec < 0) || (h->ts.tv_usec < 0))) {
static uint8_t shown_msg = 0;
if(!shown_msg) {
traceEvent(TRACE_WARNING, "Invalid timestamp: %lu.%lu", h->ts.tv_sec, h->ts.tv_usec);
shown_msg = 1;
}
return; /* We ignore this packet */
} else if(unlikely(h->caplen > h->len)) {
static uint8_t shown_msg = 0;
if(!shown_msg) {
traceEvent(TRACE_WARNING,
"Invalid packet length: [len=%"PRIu32"][caplen=%"PRIu32"][snaplen=%u]",
h->len, h->caplen, readOnlyGlobals.snaplen);
traceEvent(TRACE_WARNING, "Please disable LRO/GRO on your NIC (ethtool -k <NIC>)");
shown_msg = 1;
}
h->len = readOnlyGlobals.snaplen;
h->caplen = min(h->caplen, h->len);
}
deepPacketDecode(thread_id,h, qpacket);
}
/* ****************************************************** */
static void probeVersion(void) {
printf("\nWelcome to f2k v.%s (%s) for %s\n"
"%s\n"
"Copyright 2002-13 by Luca Deri <[email protected]>\n",
version, f2k_revision, osName,
#ifdef HAVE_PF_RING
"with native PF_RING acceleration.\n");
#else
"");
#endif
}
/* ******************************************************** */
static void usage() {
initDefaults();
probeVersion();
printf("\nUsage:\n");
printf("f2k [-i <interface|dump file>][-s <snaplen>]\n"
" [-f <filter>] [-b <level>]"
" [-G]"
" [-O <# threads>]"
#ifdef HAVE_LIBRDKAFKA
" [-X] <rdkafka option>"
#endif
"\n "
"[-I <probe name>] "
"[-v] \n"
"\n [-S <sample rate>] [-A <AS list>] [-g <PID file>]"
"\n [-2 <number>] [-3 <port>] [-4] [-5 <port>] [-6]"
"\n [-9 <path>] [--pcap-file-list <filename>]"
" [--dont-drop-privileges]\n"
"\n\n"
);
printf("[--interface|-i] <iface|pcap> | Interface name from which packets are\n");
printf(" | captured, or .pcap file (debug only).\n");
#ifdef HAVE_NETFILTER
printf(" | For capturing from netfilter queues specify\n");
printf(" | -i nf:X where X is the netfilter queue id.\n");
#endif
printf("[--snaplen|-s] <snaplen> | Packet capture snaplen. [default %u bytes]\n", readOnlyGlobals.snaplen);
printf("[--verbose|-b] <level> | Verbose output:\n"
" | 0 - No verbose logging\n"
" | 1 - Limited logging (traffic statistics)\n"
" | 2 - Full verbose logging\n");
printf("[--daemon-mode|-G] | Start as daemon.\n");
printf("[--num-threads|-O] <# threads> | Number of packet fetcher threads\n"
" | [default=%zu]. Use 1 unless you know\n"
" | what you're doing.\n",
readOnlyGlobals.numProcessThreads);
printf("[--separate-long-flows] | Separate long time flows (default no) \n");
printf("[--f2k-version|-v] | Prints the program version.\n");
printf("[--help|-h] | Prints this help.\n");
printf("--debug | Enable debugging (development only).\n");
printf("--performance | Enable performance tracing (development only).\n");
printf("[--syslog|-I] <probe name> | Log to syslog as <probe name>\n"
" | [default=stdout]\n");
#ifdef HAVE_PF_RING
printf("--cluster-id <cluster id> | Specify the PF_RING clusterId on which\n"
" | incoming packets will be bound.\n");
#endif
printf("[--sample-rate|-S] <pkt rate>:<flow rate>\n"
" | Packet capture sampling rate and flow\n"
" | sampling rate. If <pkt rate> starts with '@'\n"
" | it means that f2k will report the specified\n"
" | sampling rate but will not sample itself\n"
" | as incoming packets are already sampled\n"
" | on the specified capture device at the\n"
" | specified rate. Default: 1:1 [no sampling]\n");
printf("[--as-list|-A] <AS list> | GeoIP file containing the list of known ASs.\n"
" | Example: GeoIPASNum.dat\n");
printf("[--pid-file|-g] <PID file> | Put the PID in the specified file\n");
printf("[--flow-version|-V] <version> | NetFlow Version: 5=v5, 9=v9, 10=IPFIX\n");
printf("[--count|-2] <number> | Capture a specified number of packets\n"
" | and quit (debug only)\n");
printf("[--collector-port|-3] <port> | NetFlow/sFlow comma separated collector ports for incoming flows\n");
#ifdef linux
printf("[--cpu-affinity|-4] <CPU/Core Id> | Binds this process to the specified CPU/Core\n"
" | Note: the first available CPU corresponds to 0.\n");
#endif
printf("[--no-promisc|-6] | Capture packets in non-promiscuous mode\n");
printf("--pcap-file-list <filename> | Specify a filename containing a list\n"
" | of pcap files.\n"
" | If you use this flag the -i option will be\n"
" | ignored.\n");
printf("--dont-drop-privileges | Do not drop privileges changing to user nobody\n");
printf("--event-log <file> | Dump relevant activities into the specified log file\n");
#ifdef HAVE_LIBRDKAFKA
printf("--kafka <broker IP>:<topic> | Deliver flows to the specified Apache Kafka broker. Example localhost:test\n");
printf("--kafka-discarder <broker>:<topic> | Deliver flows from unknows IP to the specified Apache Kafka broker. Example localhost:test\n");
printf("--use-kafka-random-partitioner | Use random partitioning in kafka");
#endif
printf("--hosts-path | Path to your own /etc/hosts, /etc/networks and vlans mapping\n");
printf(" | See VLAN_MAP.txt for details\n");
printf("--any-template | Print all fields in collector mode, even if not specified in template\n");
printf("--original-speed | When using -i with a pcap file, instead of reading packets\n"
" | as fast as possible, the original speed is preserved (debug only)\n");
printf("--dont-reforge-timestamps | Disable nProbe to reforge timestamps with -i <pcap file> (debug only)\n");
printf("--dont-reforge-far-timestamps | Disable nProbe to reforge timestamps too far (+-1hour)\n");
printf("--unprivileged-user <name> | Use <name> instead of nobody when dropping privileges\n");
printf("\nFurther plugin available command line options\n");
printf("---------------------------------------------------\n");
/* ************************************************ */
printf("\n");
printf("nProbe shut down\n");
exit(0);
}
/* ****************************************************** */
static void printProcessingStats(const struct worker_stats *worker_stats,
const size_t num_workers) {
struct worker_stats all_stats = {0};
size_t i = 0;
uint32_t tot_pkts = 0;
for (i=0; i<=num_workers; ++i) {
const struct worker_stats *w_stats = &worker_stats[i];
if (i < num_workers) {
sum_worker_stats(&all_stats, &worker_stats[i]);
} else {
w_stats = &all_stats;
}
const uint64_t num_collected_pkts = w_stats->num_packets_received;
const double delta_seconds = difftime(
w_stats->last_flow_processed_timestamp,
w_stats->first_flow_processed_timestamp);
const double flows_per_second =
w_stats->num_flows_processed / delta_seconds;
const double pkts_per_second = num_collected_pkts / delta_seconds;
traceEvent(TRACE_NORMAL, "[W:%zu/%zu] "
"Flow collection: [collected pkts: %"PRIu64" (%lf pkts/s)]"
"[processed flows: %"PRIu64" (%lf flows/s)]",
i, readOnlyGlobals.numProcessThreads,
num_collected_pkts, pkts_per_second, w_stats->num_flows_processed,
flows_per_second);
}
#ifdef HAVE_ZOOKEEPER
traceEvent(TRACE_NORMAL, "[Templates received via ZooKeeper: %"PRIu64"]",
ATOMIC_OP(add, fetch,
&readWriteGlobals->collectionStats.num_zk_templates_received.value, 0));
#endif
if(readOnlyGlobals.tracePerformance && (tot_pkts > 0)) {
static unsigned long last_pkts = 0;
ticks tot;
pthread_rwlock_wrlock(&readOnlyGlobals.ticksLock);
tot = readOnlyGlobals.decodeTicks;
if(tot > 0) {
if(last_pkts == 0) last_pkts = tot_pkts;
last_pkts = tot_pkts - last_pkts;
if(last_pkts > 0) {
traceEvent(TRACE_NORMAL, "---------------------------------");
traceEvent(TRACE_NORMAL, "Decode ticks: %.2f ticks/pkt [%.2f %%]",
(float)readOnlyGlobals.decodeTicks / (float)last_pkts,
(float)(readOnlyGlobals.decodeTicks*100)/(float)tot);
traceEvent(TRACE_NORMAL, "Total ticks: %.2f ticks/pkt",
(float)tot / (float)last_pkts);
traceEvent(TRACE_NORMAL, "---------------------------------");
}
}
last_pkts = tot_pkts, readOnlyGlobals.decodeTicks = 0;
pthread_rwlock_unlock(&readOnlyGlobals.ticksLock);
}
}
/* ****************************************************** */
static void readPcapFileList(const char * filename) {
char line[512];
FILE *fd = fopen(filename, "r");
if(fd != NULL) {
struct fileList *fl, *prev;
while(!feof(fd)) {
size_t i;
int bad_line;
if(fgets(line, sizeof(line)-1, fd) == NULL) continue;
if((line[0] == '#') || (line[0] == '\n')) continue;
bad_line = 0;
for(i=0; i<strlen(line); i++) {
if(!isascii(line[i])) {
bad_line = 1;
break;
}
}
if(bad_line) {
traceEvent(TRACE_ERROR, "Your --pcap-file-list %s contains binary data: discarded", filename);
fclose(fd);
return;
}
while(strlen(line) && (line[strlen(line)-1] == '\n')) line[strlen(line)-1] = '\0';
fl = (struct fileList*)malloc(sizeof(struct fileList));
if(!fl) {
traceEvent(TRACE_ERROR, "Not enough memory parsing --pcap-file-list argument");
fclose(fd);
return;
}
fl->path = strdup(line);
if(!fl->path) {
free(fl);
traceEvent(TRACE_ERROR, "Not enough memory parsing --pcap-file-list argument");
fclose(fd);
return;
}
fl->next = NULL;
if(readOnlyGlobals.pcapFileList) {
prev = readOnlyGlobals.pcapFileList;
while(prev != NULL) {
if(prev->next)
prev = prev->next;
else
break;
}
prev->next = fl;
} else
readOnlyGlobals.pcapFileList = fl;
}
fclose(fd);
} else
traceEvent(TRACE_ERROR, "Unable to open file %s", optarg);
}
/* ****************************************************** */
/**
* Parse a port list 2055,2056,...
*/
static void parse_port_list(char *port_list, listener_list *list) {
char *strtok_aux = NULL;
const char *sport = NULL;
assert(port_list);
assert(list);
for (sport = strtok_r(port_list, ",", &strtok_aux); sport;
sport = strtok_r(NULL, ",", &strtok_aux)) {
char *strtol_end = NULL;
unsigned long lport = strtol(sport, &strtol_end, 10);
if (*strtol_end != '\0' || lport > 0xffff) {
traceEvent(TRACE_ERROR, "Invalid port %s, can't listen there", sport);
continue;
}
struct port_collector *collector = createNetFlowListener(UDP, lport);
listener_list_append(list, collector);
}
}
static void initDefaults(void) {
/* Set defaults */
#ifdef HAVE_GEOIP
readOnlyGlobals.geo_ip_asn_db = NULL;
#endif
readOnlyGlobals.snaplen = PCAP_DEFAULT_SNAPLEN;
readOnlyGlobals.pcapFileList = NULL;
readOnlyGlobals.pcapFile = NULL;
readOnlyGlobals.unprivilegedUser = strdup("nobody");
#ifdef HAVE_PF_RING
readOnlyGlobals.cluster_id = -1;
#endif
pthread_rwlock_init(&readOnlyGlobals.rb_databases.mutex,0);
}
static void printArgv(int argc,char *argv[]){
int i;
for(i=0; i<argc; i++)
traceEvent(TRACE_ERROR, "[%d][%s]", i, argv[i]);
}
/**
* Parse kafka <broker>@<topic> argument
* @param arg Text argument
* @param rk_config Config to save broker
* @param topic name: Place to save topic
* @return true if success, false in other case
*/
static bool parse_kafka_broker_topic_arg(const char *const_arg,
rd_kafka_conf_t *rk_conf, char **ret_topic) {
assert(const_arg);
assert(rk_conf);
assert(ret_topic);
char *strtok_aux = NULL;
const size_t const_arg_len = strlen(const_arg);
char optarg[const_arg_len + 1];
memcpy(optarg, const_arg, const_arg_len);
optarg[const_arg_len] = '\0';
const char *broker = strtok_r(optarg, "@", &strtok_aux);
const char *topic = strtok_r(NULL, "", &strtok_aux);
if (!broker || !topic) {
traceEvent(TRACE_ERROR,
"Invalid format for --kafka-netflow-consumer parameter");
return false;
}
char *config = NULL;
asprintf(&config, "metadata.broker.list=%s", broker);
parse_kafka_config(rk_conf, NULL, config);
free(config);
*ret_topic = strdup(topic);
return true;
}
static int parseOptions(int argc, char* argv[], const bool reparse_options) {
char line[2048];
FILE *fd;
int opt, i, option_index;
char *strtok_aux = NULL, *collector_ports = NULL;
#ifdef HAVE_ZOOKEEPER
char *new_zk_host = NULL;
#endif
#ifdef HAVE_LIBRDKAFKA
readOnlyGlobals.kafka.use_client_mac_partitioner = 1;
char *kafka_topic = NULL;
char *kafka_discarder_topic = NULL;
rd_kafka_conf_t *rk_conf = reparse_options ? NULL : rd_kafka_conf_new();
rd_kafka_conf_t *rk_discarder_conf = reparse_options ? NULL : rd_kafka_conf_new();
rd_kafka_topic_conf_t *rk_nf_consumer_topic_conf = reparse_options ? NULL :
rd_kafka_topic_conf_new();
rd_kafka_topic_conf_t *rkt_conf = reparse_options ? NULL :
rd_kafka_topic_conf_new();
rd_kafka_topic_conf_t *rkt_discarder_conf = reparse_options ? NULL :
rd_kafka_topic_conf_new();
if (!reparse_options) {
readOnlyGlobals.kafka_consumer.conf = rd_kafka_conf_new();
}
#endif
#ifdef HAVE_UDNS
char *new_dns_servers = NULL;
size_t dns_cache_size_mb = 0;
time_t dns_cache_timeout_s = 0;
#endif
if(!reparse_options)
initDefaults();
int reload_sensors_info = 0;
optind = 0;
#ifdef HAVE_OPTRESET
optreset = 1; /* Make sure getopt read options again */
#endif
readOnlyGlobals.argc = 0;
if(reparse_options && readOnlyGlobals.argv)
free(readOnlyGlobals.argv);
readOnlyGlobals.argv = (char**)malloc(sizeof(char*)*MAX_NUM_OPTIONS);
memset(readOnlyGlobals.argv, 0, sizeof(char*)*MAX_NUM_OPTIONS);
if(readOnlyGlobals.argv == NULL) return(-1);
if((argc == 2) && (argv[1][0] != '-')) {
char *tok, cont=1;
fd = fopen(argv[1], "r");
if(fd == NULL) {
traceEvent(TRACE_ERROR, "Unable to read config. file %s", argv[1]);
exit(-1);
}
readOnlyGlobals.argv[readOnlyGlobals.argc++] = strdup("f2k");
while(cont && fgets(line, sizeof(line), fd)) {
/* printf("line='%s'\n", line); */
/*
Config files accept both