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initialize.c
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/*
* -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
*
* http://www.ntop.org
*
* Copyright (C) 1998-2012 Luca Deri <[email protected]>
*
* -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "ntop.h"
#include "globals-report.h"
/*
* calculate the domain name for this host
*/
static void setDomainName(void) {
int len;
#ifndef WIN32
char *p;
/*
* The name of the local domain is now calculated properly
* Kimmo Suominen <[email protected]>
*/
if(myGlobals.runningPref.domainName[0] == '\0') {
if((getdomainname(myGlobals.runningPref.domainName, MAXHOSTNAMELEN) != 0)
|| (myGlobals.runningPref.domainName[0] == '\0')
|| (strcmp(myGlobals.runningPref.domainName, "(none)") == 0)) {
if((gethostname(myGlobals.runningPref.domainName, MAXHOSTNAMELEN) == 0)
&& ((p = memchr(myGlobals.runningPref.domainName, '.', MAXHOSTNAMELEN)) != NULL)) {
myGlobals.runningPref.domainName[MAXHOSTNAMELEN - 1] = '\0';
++p;
memmove(myGlobals.runningPref.domainName, p, (MAXHOSTNAMELEN+myGlobals.runningPref.domainName-p));
} else
myGlobals.runningPref.domainName[0] = '\0';
}
/*
* Still unresolved! Try again
*/
if(myGlobals.runningPref.domainName[0] == '\0') {
char szLclHost[64];
struct hostent *lpstHostent;
gethostname(szLclHost, 64);
lpstHostent = gethostbyname(szLclHost);
if(lpstHostent) {
struct hostent *hp;
hp = (struct hostent*)gethostbyaddr((char*)lpstHostent->h_addr, 4, AF_INET);
if(hp && (hp->h_name)) {
char *dotp = (char*) hp->h_name;
int i;
for(i=0; (dotp[i] != '\0') && (dotp[i] != '.'); i++)
;
if(dotp[i] == '.')
strncpy(myGlobals.runningPref.domainName, &dotp[i+1], MAXHOSTNAMELEN);
}
}
}
if(myGlobals.runningPref.domainName[0] == '\0') {
/* Last chance.... */
/* strncpy(myGlobals.runningPref.domainName, "please_set_your_local_domain.org", MAXHOSTNAMELEN); */
;
}
}
#endif
len = (int)(strlen(myGlobals.runningPref.domainName)-1);
while((len > 0) && (myGlobals.runningPref.domainName[len] != '.'))
len--;
if((len > 0)
&& ((len+1) < strlen(myGlobals.runningPref.domainName)))
myGlobals.shortDomainName = strdup(&myGlobals.runningPref.domainName[len+1]);
else
myGlobals.shortDomainName = strdup(myGlobals.runningPref.domainName);
}
/* ------------------------------------------------------------ */
/*
* Initialize memory/data for the protocols being monitored
* looking at local or system wide "services" files
*/
void initIPServices(void) {
FILE* fd;
int idx, numSlots, len;
traceEvent(CONST_TRACE_NOISY, "Initializing IP services");
/* Let's count the entries first */
numSlots = 0;
for(idx=0; myGlobals.configFileDirs[idx] != NULL; idx++) {
char tmpStr[256];
safe_snprintf(__FILE__, __LINE__, tmpStr, sizeof(tmpStr), "%s/services", myGlobals.configFileDirs[idx]);
fd = fopen(tmpStr, "r");
if(fd != NULL) {
char tmpLine[512];
while(fgets(tmpLine, 512, fd))
if((tmpLine[0] != '#') && (strlen(tmpLine) > 10)) {
/* discard 9/tcp sink null */
numSlots++;
}
fclose(fd);
}
}
if(numSlots == 0) numSlots = CONST_HASH_INITIAL_SIZE;
myGlobals.numActServices = 2*numSlots; /* Double the hash */
/* ************************************* */
len = (int)(sizeof(ServiceEntry*)*myGlobals.numActServices);
myGlobals.udpSvc = (ServiceEntry**)malloc(len);
memset(myGlobals.udpSvc, 0, len);
myGlobals.tcpSvc = (ServiceEntry**)malloc(len);
memset(myGlobals.tcpSvc, 0, len);
for(idx=0; myGlobals.configFileDirs[idx] != NULL; idx++) {
char tmpStr[256];
safe_snprintf(__FILE__, __LINE__, tmpStr, sizeof(tmpStr), "%s/services", myGlobals.configFileDirs[idx]);
fd = fopen(tmpStr, "r");
if(fd != NULL) {
char tmpLine[512];
while(fgets(tmpLine, 512, fd))
if((tmpLine[0] != '#') && (strlen(tmpLine) > 10)) {
/* discard 9/tcp sink null */
char name[64], proto[16];
int numPort;
/* Fix below courtesy of Andreas Pfaller <[email protected]> */
if(3 == sscanf(tmpLine, "%63[^ \t] %d/%15s", name, &numPort, proto)) {
/* traceEvent(CONST_TRACE_INFO, "'%s' - '%s' - '%d'", name, proto, numPort); */
if(strcmp(proto, "tcp") == 0)
addPortHashEntry(myGlobals.tcpSvc, numPort, name);
else
addPortHashEntry(myGlobals.udpSvc, numPort, name);
}
}
fclose(fd);
break;
}
}
/* Add some basic services, just in case they
are not included in /etc/services */
addPortHashEntry(myGlobals.tcpSvc, 21, "ftp");
addPortHashEntry(myGlobals.tcpSvc, 20, "ftp-data");
addPortHashEntry(myGlobals.tcpSvc, 23, "telnet");
addPortHashEntry(myGlobals.tcpSvc, 42, "name");
addPortHashEntry(myGlobals.tcpSvc, 80, "http");
addPortHashEntry(myGlobals.tcpSvc, 443, "https");
addPortHashEntry(myGlobals.udpSvc, 137, "netbios-ns");
addPortHashEntry(myGlobals.tcpSvc, 137, "netbios-ns");
addPortHashEntry(myGlobals.udpSvc, 138, "netbios-dgm");
addPortHashEntry(myGlobals.tcpSvc, 138, "netbios-dgm");
addPortHashEntry(myGlobals.udpSvc, 139, "netbios-ssn");
addPortHashEntry(myGlobals.tcpSvc, 139, "netbios-ssn");
addPortHashEntry(myGlobals.tcpSvc, 109, "pop-2");
addPortHashEntry(myGlobals.tcpSvc, 110, "pop-3");
addPortHashEntry(myGlobals.tcpSvc, 1109,"kpop");
addPortHashEntry(myGlobals.udpSvc, 161, "snmp");
addPortHashEntry(myGlobals.udpSvc, 162, "snmp-trap");
addPortHashEntry(myGlobals.udpSvc, 635, "mount");
addPortHashEntry(myGlobals.udpSvc, 640, "pcnfs");
addPortHashEntry(myGlobals.udpSvc, 650, "bwnfs");
addPortHashEntry(myGlobals.udpSvc, 2049,"nfsd");
addPortHashEntry(myGlobals.udpSvc, 1110,"nfsd-status");
}
/* ******************************* */
void createDeviceIpProtosList(int devIdx) {
size_t len = (size_t)myGlobals.numIpProtosList*sizeof(TrafficCounter);
if(len > 0) {
if(myGlobals.device[devIdx].ipProtosList != NULL)
free(myGlobals.device[devIdx].ipProtosList);
if((myGlobals.device[devIdx].ipProtosList = (TrafficCounter*)malloc(len)) == NULL)
return;
memset(myGlobals.device[devIdx].ipProtosList, 0, len);
}
}
/* ******************************* */
/*
Function below courtesy of
Eric Dumazet <[email protected]>
*/
void resetDevice(int devIdx, short fullReset) {
int len;
void *ptr;
if(myGlobals.device[devIdx].dummyDevice) return;
myGlobals.device[devIdx].hosts.actualHashSize = CONST_HASH_INITIAL_SIZE;
len = CONST_HASH_INITIAL_SIZE * sizeof(HostTraffic*);
if(myGlobals.device[devIdx].hosts.hash_hostTraffic == NULL) {
ptr = calloc(CONST_HASH_INITIAL_SIZE, sizeof(HostTraffic*));
myGlobals.device[devIdx].hosts.hash_hostTraffic = ptr;
}
memset(myGlobals.device[devIdx].hosts.hash_hostTraffic, 0, len);
resetTrafficCounter(&myGlobals.device[devIdx].receivedPkts);
resetTrafficCounter(&myGlobals.device[devIdx].droppedPkts);
resetTrafficCounter(&myGlobals.device[devIdx].ethernetPkts);
resetTrafficCounter(&myGlobals.device[devIdx].broadcastPkts);
resetTrafficCounter(&myGlobals.device[devIdx].multicastPkts);
resetTrafficCounter(&myGlobals.device[devIdx].ipPkts);
resetTrafficCounter(&myGlobals.device[devIdx].ethernetBytes);
resetTrafficCounter(&myGlobals.device[devIdx].ipv4Bytes);
resetTrafficCounter(&myGlobals.device[devIdx].fragmentedIpBytes);
resetTrafficCounter(&myGlobals.device[devIdx].tcpBytes);
resetTrafficCounter(&myGlobals.device[devIdx].udpBytes);
resetTrafficCounter(&myGlobals.device[devIdx].otherIpBytes);
resetTrafficCounter(&myGlobals.device[devIdx].icmpBytes);
resetTrafficCounter(&myGlobals.device[devIdx].stpBytes);
resetTrafficCounter(&myGlobals.device[devIdx].ipsecBytes);
resetTrafficCounter(&myGlobals.device[devIdx].netbiosBytes);
resetTrafficCounter(&myGlobals.device[devIdx].arpRarpBytes);
resetTrafficCounter(&myGlobals.device[devIdx].greBytes);
resetTrafficCounter(&myGlobals.device[devIdx].ipv6Bytes);
resetTrafficCounter(&myGlobals.device[devIdx].otherBytes);
resetTrafficCounter(&myGlobals.device[devIdx].lastMinEthernetBytes);
resetTrafficCounter(&myGlobals.device[devIdx].lastFiveMinsEthernetBytes);
resetTrafficCounter(&myGlobals.device[devIdx].lastMinEthernetPkts);
resetTrafficCounter(&myGlobals.device[devIdx].lastFiveMinsEthernetPkts);
resetTrafficCounter(&myGlobals.device[devIdx].lastNumEthernetPkts);
resetTrafficCounter(&myGlobals.device[devIdx].lastEthernetPkts);
resetTrafficCounter(&myGlobals.device[devIdx].lastTotalPkts);
resetTrafficCounter(&myGlobals.device[devIdx].lastBroadcastPkts);
resetTrafficCounter(&myGlobals.device[devIdx].lastMulticastPkts);
resetTrafficCounter(&myGlobals.device[devIdx].lastEthernetBytes);
resetTrafficCounter(&myGlobals.device[devIdx].lastIpBytes);
resetTrafficCounter(&myGlobals.device[devIdx].lastNonIpBytes);
memset(&myGlobals.device[devIdx].rcvdPktStats, 0, sizeof(PacketStats));
memset(&myGlobals.device[devIdx].rcvdPktTTLStats, 0, sizeof(TTLstats));
myGlobals.device[devIdx].peakThroughput = 0;
myGlobals.device[devIdx].actualThpt = 0;
myGlobals.device[devIdx].lastMinThpt = 0;
myGlobals.device[devIdx].lastFiveMinsThpt = 0;
myGlobals.device[devIdx].peakPacketThroughput = 0;
myGlobals.device[devIdx].actualPktsThpt = 0;
myGlobals.device[devIdx].lastMinPktsThpt = 0;
myGlobals.device[devIdx].lastFiveMinsPktsThpt = 0;
myGlobals.device[devIdx].lastThptUpdate = 0;
myGlobals.device[devIdx].lastMinThptUpdate = 0;
myGlobals.device[devIdx].lastHourThptUpdate = 0;
myGlobals.device[devIdx].lastFiveMinsThptUpdate = 0;
myGlobals.device[devIdx].throughput = 0;
myGlobals.device[devIdx].packetThroughput = 0;
myGlobals.device[devIdx].numThptSamples = 0;
if(myGlobals.pcap_file_list == NULL) {
myGlobals.device[devIdx].lastThptUpdate = myGlobals.device[devIdx].lastMinThptUpdate =
myGlobals.device[devIdx].lastHourThptUpdate = myGlobals.device[devIdx].lastFiveMinsThptUpdate = time(NULL);
}
resetTrafficCounter(&myGlobals.device[devIdx].lastMinEthernetBytes);
resetTrafficCounter(&myGlobals.device[devIdx].lastFiveMinsEthernetBytes);
memset(&myGlobals.device[devIdx].tcpGlobalTrafficStats, 0, sizeof(SimpleProtoTrafficInfo));
memset(&myGlobals.device[devIdx].udpGlobalTrafficStats, 0, sizeof(SimpleProtoTrafficInfo));
memset(&myGlobals.device[devIdx].icmpGlobalTrafficStats, 0, sizeof(SimpleProtoTrafficInfo));
memset(myGlobals.device[devIdx].last60MinTopTalkers, 0, sizeof(myGlobals.device[devIdx].last60MinTopTalkers));
memset(myGlobals.device[devIdx].last24HoursTopTalkers, 0, sizeof(myGlobals.device[devIdx].last24HoursTopTalkers));
myGlobals.device[devIdx].hosts.hostsno = 1; /* Broadcast entry */
if(fullReset) {
if(myGlobals.device[devIdx].netflowGlobals != NULL)
free(myGlobals.device[devIdx].netflowGlobals);
myGlobals.device[devIdx].netflowGlobals = NULL;
if(myGlobals.device[devIdx].sflowGlobals != NULL)
free(myGlobals.device[devIdx].sflowGlobals);
myGlobals.device[devIdx].sflowGlobals = NULL;
}
len = (int)(myGlobals.numIpProtosToMonitor*sizeof(SimpleProtoTrafficInfo));
if(myGlobals.device[devIdx].ipProtosList != NULL) {
free(myGlobals.device[devIdx].ipProtosList);
myGlobals.device[devIdx].ipProtosList = NULL;
}
createDeviceIpProtosList(devIdx);
}
/* ******************************************* */
void initCounters(void) {
int len, i;
setDomainName();
_in6addr_linklocal_allnodes.s6_addr[0] = 0xff;
_in6addr_linklocal_allnodes.s6_addr[1] = 0x02;
_in6addr_linklocal_allnodes.s6_addr[2] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[3] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[4] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[5] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[6] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[7] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[8] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[9] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[10] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[11] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[12] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[13] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[14] = 0x00;
_in6addr_linklocal_allnodes.s6_addr[15] = 0x01;
memset(myGlobals.transTimeHash, 0, sizeof(myGlobals.transTimeHash));
memset(myGlobals.dummyEthAddress, 0, LEN_ETHERNET_ADDRESS);
for(len=0; len<LEN_ETHERNET_ADDRESS; len++)
myGlobals.dummyEthAddress[len] = len;
for(i=0; i<myGlobals.numDevices; i++) {
if(myGlobals.runningPref.enableSessionHandling) {
myGlobals.device[i].sessions = (IPSession**)calloc(sizeof(IPSession*), MAX_TOT_NUM_SESSIONS);
} else
myGlobals.device[i].sessions = NULL;
myGlobals.device[i].fragmentList = NULL;
}
myGlobals.hashCollisionsLookup = 0;
if(myGlobals.pcap_file_list == NULL)
myGlobals.initialSniffTime = myGlobals.lastRefreshTime = time(NULL);
else
myGlobals.initialSniffTime = 0; /* We set the start when first pkt is
* read */
/* TODO why here AND in globals-core.c? */
myGlobals.numHandledSIGPIPEerrors = 0;
for (i=0; i<=1; i++) {
myGlobals.numHandledRequests[i] = 0;
myGlobals.numHandledBadrequests[i] = 0;
myGlobals.numSuccessfulRequests[i] = 0;
myGlobals.numUnsuccessfulInvalidrequests[i] = 0;
myGlobals.numUnsuccessfulInvalidmethod[i] = 0;
myGlobals.numUnsuccessfulInvalidversion[i] = 0;
myGlobals.numUnsuccessfulTimeout[i] = 0;
myGlobals.numUnsuccessfulNotfound[i] = 0;
myGlobals.numUnsuccessfulDenied[i] = 0;
myGlobals.numUnsuccessfulForbidden[i] = 0;
}
myGlobals.numSSIRequests = 0;
myGlobals.numBadSSIRequests = 0;
myGlobals.numHandledSSIRequests = 0;
myGlobals.webServerRequestQueueLength = DEFAULT_WEBSERVER_REQUEST_QUEUE_LEN;
}
/* ******************************* */
void resetStats(int deviceId) {
u_int j;
traceEvent(CONST_TRACE_INFO, "Resetting traffic statistics for device %s",
myGlobals.device[deviceId].humanFriendlyName);
if(myGlobals.purgeMutex.isInitialized)
accessMutex(&myGlobals.purgeMutex, "resetStats");
for(j=FIRST_HOSTS_ENTRY; j<myGlobals.device[deviceId].hosts.actualHashSize; j++) {
HostTraffic *el = myGlobals.device[deviceId].hosts.hash_hostTraffic[j], *elNext;
if(el) lockExclusiveHostsHashMutex(el, "resetStats");
while(el != NULL) {
elNext = el->next;
if((el != myGlobals.broadcastEntry) && (el != myGlobals.otherHostEntry)) {
unlockExclusiveHostsHashMutex(el);
freeHostInfo(el, deviceId);
if(elNext) lockExclusiveHostsHashMutex(elNext, "resetStats");
} else {
if(!elNext)
unlockExclusiveHostsHashMutex(el);
}
el = elNext;
}
myGlobals.device[deviceId].hosts.hash_hostTraffic[j] = NULL;
}
resetDevice(deviceId, 0);
if(myGlobals.device[deviceId].sessions != NULL) {
for(j=0; j<MAX_TOT_NUM_SESSIONS; j++)
if(myGlobals.device[deviceId].sessions[j] != NULL) {
free(myGlobals.device[deviceId].sessions[j]);
myGlobals.device[deviceId].sessions[j] = NULL;
}
}
myGlobals.device[deviceId].hosts.hash_hostTraffic[BROADCAST_HOSTS_ENTRY] = myGlobals.broadcastEntry;
myGlobals.broadcastEntry->hostSerial.serialType = SERIAL_IPV4;
myGlobals.broadcastEntry->hostSerial.value.ipSerial.ipAddress.Ip4Address.s_addr = -1;
myGlobals.broadcastEntry->next = NULL;
setHostFlag(FLAG_BROADCAST_HOST, myGlobals.broadcastEntry);
if(myGlobals.otherHostEntry != myGlobals.broadcastEntry) {
myGlobals.device[deviceId].hosts.hash_hostTraffic[OTHER_HOSTS_ENTRY] = myGlobals.otherHostEntry;
/* Dirty trick */
myGlobals.otherHostEntry->hostSerial.serialType = SERIAL_IPV4;
myGlobals.otherHostEntry->hostSerial.value.ipSerial.ipAddress.Ip4Address.s_addr = -1;
myGlobals.otherHostEntry->next = NULL;
}
if(myGlobals.purgeMutex.isInitialized)
releaseMutex(&myGlobals.purgeMutex);
}
/* ******************************* */
void initSingleGdbm(GDBM_FILE *database,
char *dbName, char *directory,
int doUnlink, struct stat *statbuf) {
char tmpBuf[200], theDate[48];
time_t st_time, now;
struct tm t;
double d;
/* Courtesy of Andreas Pfaller <[email protected]>. */
memset(&tmpBuf, 0, sizeof(tmpBuf));
#ifdef WIN32
{
unsigned long driveSerial;
get_serial(&driveSerial);
safe_snprintf(__FILE__, __LINE__, tmpBuf, sizeof(tmpBuf), "%s/%u",
directory != NULL ? directory : myGlobals.dbPath, driveSerial);
mkdir_p("DB", tmpBuf, 0x777);
safe_snprintf(__FILE__, __LINE__, tmpBuf, sizeof(tmpBuf), "%s/%u/%s",
directory != NULL ? directory : myGlobals.dbPath, driveSerial,
dbName);
}
#else
safe_snprintf(__FILE__, __LINE__, tmpBuf, sizeof(tmpBuf), "%s/%s",
directory != NULL ? directory : myGlobals.dbPath,
dbName);
#endif
if(statbuf) {
if(stat(tmpBuf, statbuf) == 0) {
/* File already exists */
if((doUnlink != TRUE) && (doUnlink != FALSE)) {
traceEvent(CONST_TRACE_INFO, "Checking age of database %s", tmpBuf);
/* Some systems or mounts don't maintain atime so fox 'em */
if (statbuf->st_atime > 0)
st_time = statbuf->st_atime;
else
st_time = 0;
if((statbuf->st_mtime) && (statbuf->st_mtime > st_time))
st_time = statbuf->st_mtime;
if((statbuf->st_ctime) && (statbuf->st_ctime > st_time))
st_time = statbuf->st_ctime;
strftime(theDate, sizeof(theDate)-1, CONST_LOCALE_TIMESPEC, localtime_r(&st_time, &t));
theDate[sizeof(theDate)-1] = '\0';
now = time(NULL);
traceEvent(CONST_TRACE_NOISY,
"...last create/modify/access was %s, %.1f second(s) ago",
theDate,
d = difftime(now, st_time));
if(d > (15 * 60)) {
traceEvent(CONST_TRACE_INFO, "...older, will recreate it");
doUnlink = TRUE;
} else {
traceEvent(CONST_TRACE_INFO, "...new enough, will not recreate it");
doUnlink = FALSE; /* New enough */
}
}
} else {
memset(statbuf, 0, sizeof(struct stat));
}
}
if(doUnlink == TRUE)
unlink(tmpBuf); /* Delete the old one (if present) */
traceEvent(CONST_TRACE_NOISY, "%s database '%s'",
doUnlink == TRUE ? "Creating" : "Opening",
tmpBuf);
*database = gdbm_open (tmpBuf, 0, GDBM_WRCREAT, 00640, NULL);
if(*database == NULL) {
traceEvent(CONST_TRACE_ERROR, "....open of %s failed: %s",
tmpBuf,
#if defined(WIN32) && defined(__GNUC__)
"unknown gdbm errno"
#else
gdbm_strerror(gdbm_errno)
#endif
);
if(directory == NULL)
traceEvent(CONST_TRACE_INFO, "Possible solution: please use '-P <directory>'");
else {
traceEvent(CONST_TRACE_INFO, "1. Is another instance of ntop running?");
traceEvent(CONST_TRACE_INFO, "2. Make sure that the user you specified can write in the target directory");
}
traceEvent(CONST_TRACE_FATALERROR, "GDBM open failed, ntop shutting down...");
exit(7); /* Just in case */
}
}
/* ************************************************************ */
#ifdef HAVE_PTHREAD_ATFORK
void reinitMutexes (void) {
int i;
/*
* Although the fork()ed child gets a copy of the storage for the mutexes,
* in fact, these are invalid copies and the mutex must be cleared and
* reinitialized. Read man pthread_atfork for lots more...
*
* Note that once this reinit happens, THEY ARE NOT THE SAME MUTEX.
* They have the same 'name', but are different blocks of (unshared) storage.
*
* Although the ntop 2.2 code has the ILLUSION that the resources are protected
* they are not! The code is wrong, but a real fix will have to be in 2.3...
* (BMS 06-2003, ntop 2.2c)
*
* NOTE: For the logViewMutex, we must use the native calls, not the enhanced ones
* in util.c - otherwise the calls to traceEvent() cause deadlocks!
*/
createMutex(&myGlobals.logViewMutex);
createMutex(&myGlobals.gdbmMutex); /* data to synchronize thread access to db files */
createMutex(&myGlobals.portsMutex); /* Avoid race conditions while handling ports */
for(i=0; i<NUM_SESSION_MUTEXES; i++)
createMutex(&myGlobals.sessionsMutex[i]); /* data to synchronize TCP sessions access */
createMutex(&myGlobals.purgePortsMutex); /* data to synchronize port purge access */
createMutex(&myGlobals.purgePortsMutex); /* data to synchronize port purge access */
for(i=0; i<CONST_HASH_INITIAL_SIZE; i++) {
createMutex(&myGlobals.hostsHashMutex[i]);
myGlobals.hostsHashMutexNumLocks[i] = 0;
}
createMutex(&myGlobals.securityItemsMutex);
createMutex(&myGlobals.hostsHashLockMutex);
}
#endif /* HAVE_PTHREAD_ATFORK */
/*
* Initialize all the threads used by ntop to:
* a) sniff packets from NICs and push them in internal data structures
* b) pop and decode packets
* c) collect data
* d) display/emit information
*/
void initThreads(void) {
int i;
/*
* Create the thread (3) - SFP - Scan Fingerprints
*/
createThread(&myGlobals.scanFingerprintsThreadId, scanFingerprintLoop, NULL);
traceEvent(CONST_TRACE_INFO, "THREADMGMT[t%lu]: SFP: Started thread for fingerprinting",
(long)myGlobals.scanFingerprintsThreadId);
/*
* Create the thread (4) - SIH - Scan Idle Hosts - optional
*/
createThread(&myGlobals.scanIdleThreadId, scanIdleLoop, NULL);
traceEvent(CONST_TRACE_INFO, "THREADMGMT[t%lu]: SIH: Started thread for idle hosts detection",
(long)myGlobals.scanIdleThreadId);
if(myGlobals.runningPref.numericFlag != noDnsResolution) {
createMutex(&myGlobals.addressResolutionMutex);
#if defined(HAVE_GETHOSTBYADDR_R)
myGlobals.numDequeueAddressThreads = MAX_NUM_DEQUEUE_ADDRESS_THREADS;
#else
myGlobals.numDequeueAddressThreads = 1;
#endif
initAddressResolution();
/*
* Create the thread (5) - DNSAR - DNS Address Resolution - optional
*/
for(i=0; i<myGlobals.numDequeueAddressThreads; i++) {
createThread(&myGlobals.dequeueAddressThreadId[i], dequeueAddress, (char*)((long)i));
traceEvent(CONST_TRACE_INFO, "THREADMGMT[t%lu]: DNSAR(%d): Started thread for DNS address resolution",
(long)myGlobals.dequeueAddressThreadId[i], i+1);
}
}
}
/*
* Initialize helper applications
*/
void initApps(void) {
traceEvent(CONST_TRACE_INFO, "Initializing external applications");
/* Nothing to do at the moment */
}
/* ******************************* */
void initDeviceSemaphores(int deviceId) {
traceEvent(CONST_TRACE_INFO, "Initializing device %s (%d)",
myGlobals.device[deviceId].name, deviceId);
createMutex(&myGlobals.device[deviceId].counterMutex);
createMutex(&myGlobals.device[deviceId].asMutex);
createMutex(&myGlobals.device[deviceId].packetProcessMutex);
createMutex(&myGlobals.device[deviceId].packetQueueMutex);
if(myGlobals.device[deviceId].packetQueue)
memset(myGlobals.device[deviceId].packetQueue, 0,
sizeof(PacketInformation) * (CONST_PACKET_QUEUE_LENGTH+1));
myGlobals.device[deviceId].packetQueueLen = 0;
myGlobals.device[deviceId].maxPacketQueueLen = 0;
myGlobals.device[deviceId].packetQueueHead = 0;
myGlobals.device[deviceId].packetQueueTail = 0;
createCondvar(&myGlobals.device[deviceId].queueCondvar);
}
/* ******************************* */
void allocDeviceMemory(int deviceId) {
if(!myGlobals.device[deviceId].ipPorts)
myGlobals.device[deviceId].ipPorts =
(PortCounter**)calloc(sizeof(PortCounter*), MAX_IP_PORT);
if(!myGlobals.device[deviceId].packetQueue)
myGlobals.device[deviceId].packetQueue =
(PacketInformation*)calloc(sizeof(PacketInformation), (CONST_PACKET_QUEUE_LENGTH+1));
initL7DeviceDiscovery(deviceId);
myGlobals.device[deviceId].l7.protoTraffic = (Counter*)calloc(myGlobals.l7.numSupportedProtocols, sizeof(Counter));
}
/* ******************************* */
/*
* Initialize the table of NICs enabled for packet sniffing
*
* Unless we are reading data from a file:
*
* 1. find a suitable interface, if none ws not specified one
* using pcap_lookupdev()
* 2. get the interface network number and its mask
* using pcap_lookupnet()
* 3. get the type of the underlying network and the data-link encapsulation method
* using pcap_datalink()
*
* if device is "none" it adds a dummy interface
*/
void addDevice(char* deviceName, char* deviceDescr) {
int i, deviceId, mallocLen;
char *workDevices = NULL;
char myName[255], *column = NULL, ebuf[CONST_SIZE_PCAP_ERR_BUF], tmpStr[64];
ebuf[0] = '\0', myName[0] = '\0';
if(deviceName == NULL) {
traceEvent(CONST_TRACE_WARNING, "Attempt to add a NULL device");
return;
}
/* Remove unwanted characters */
sanitizeIfName(deviceName);
traceEvent(CONST_TRACE_NOISY, "Adding network device %s", deviceName);
if((deviceName != NULL) && (strcmp(deviceName, "none") == 0)) {
deviceId = createDummyInterface("none");
traceEvent(CONST_TRACE_INFO, "-i none, so initialized only a dummy device");
} else {
deviceId = myGlobals.numDevices;
safe_snprintf(__FILE__, __LINE__, tmpStr, sizeof(tmpStr), "device.name.%s", deviceName);
if(fetchPrefsValue(tmpStr, ebuf, sizeof(ebuf)) != -1)
myGlobals.device[deviceId].humanFriendlyName = strdup(ebuf);
else
myGlobals.device[deviceId].humanFriendlyName = strdup(deviceDescr);
allocDeviceMemory(deviceId);
myGlobals.device[deviceId].name = strdup(deviceName);
myGlobals.device[deviceId].samplingRate = myGlobals.runningPref.samplingRate;
calculateUniqueInterfaceName(deviceId);
myGlobals.numDevices++;
if(myGlobals.numDevices >= MAX_NUM_DEVICES) {
static u_char msgSent = 0;
if(!msgSent) {
traceEvent(CONST_TRACE_WARNING, "ntop can handle up to %d interfaces",
myGlobals.numDevices);
traceEvent(CONST_TRACE_NOISY, "Additional interfaces will be ignored");
msgSent = 1;
}
}
/* ********************************************* */
#ifndef WIN32
column = strchr(myGlobals.device[deviceId].name, ':');
#endif
/*
The timeout below for packet capture
has been set to 100ms.
Courtesy of: Nicolai Petri <[email protected]>
*/
if((!myGlobals.device[deviceId].dummyDevice)
&& (!myGlobals.device[deviceId].virtualDevice)
&& (column == NULL)) {
#ifdef WIN32
if(strncmp(myGlobals.device[deviceId].name, "rpcap:", 6) != 0) {
/*
The code below has been disabled because it seems
that with some network adapters, although there are no
errors at all, the stack memory is corrupted and this
will cause troubles later on
*/
#if 0
NetType adapter;
LPADAPTER a = PacketOpenAdapter((LPTSTR)myGlobals.device[deviceId].name);
if(a == NULL) {
traceEvent(CONST_TRACE_FATALERROR, "Unable to open device '%s' (invalid name?)",
myGlobals.device[deviceId].name);
exit(8); /* Just in case */
}
if(PacketGetNetType (a,&adapter)) {
myGlobals.device[deviceId].deviceSpeed = adapter.LinkSpeed;
} else
PacketCloseAdapter((LPTSTR)myGlobals.device[deviceId].name);
#endif
}
#else /* not WIN32 */
if(setuid(0) == -1) {
traceEvent(CONST_TRACE_FATALERROR, "Unable to become root");
exit(9); /* Just in case */
}
#endif
myGlobals.device[deviceId].pcapPtr =
pcap_open_live(myGlobals.device[deviceId].name,
MAX_PACKET_LEN,
myGlobals.runningPref.disablePromiscuousMode == 1 ? 0 : 1,
1000 /* ms */, ebuf);
if(myGlobals.device[deviceId].pcapPtr == NULL) {
traceEvent(CONST_TRACE_ERROR, "pcap_open_live(): '%s'", ebuf);
if(myGlobals.runningPref.disablePromiscuousMode == 1)
traceEvent(CONST_TRACE_INFO,
"Sorry, but on this system, even with -s, it appears "
"that ntop must be started as root");
traceEvent(CONST_TRACE_INFO, "Please correct the problem or select "
"a different interface using the -i flag");
traceEvent(CONST_TRACE_FATALERROR, "Not root, ntop shutting down...");
exit(10); /* Just in case */
}
#ifdef HAVE_PF_RING
pcap_set_appl_name_linux(myGlobals.device[deviceId].pcapPtr, "ntop");
#endif
if(myGlobals.runningPref.pcapLog != NULL) {
if(strlen(myGlobals.runningPref.pcapLog) > 64)
myGlobals.runningPref.pcapLog[64] = '\0';
safe_snprintf(__FILE__, __LINE__, myName, sizeof(myName), "%s%c%s.%s.pcap",
myGlobals.runningPref.pcapLogBasePath, /* Added by Ola Lundqvist <[email protected]> */
CONST_PATH_SEP, myGlobals.runningPref.pcapLog,
myGlobals.device[deviceId].uniqueIfName != NULL ?
myGlobals.device[deviceId].uniqueIfName :
myGlobals.device[deviceId].name);
myGlobals.device[deviceId].pcapDumper = pcap_dump_open(myGlobals.device[deviceId].pcapPtr, myName);
if(myGlobals.device[deviceId].pcapDumper == NULL) {
traceEvent(CONST_TRACE_FATALERROR, "pcap_dump_open(..., '%s') failed", myName);
exit(11); /* Just in case */
}
traceEvent(CONST_TRACE_NOISY, "Saving packets into file %s", myName);
}
if(myGlobals.runningPref.enableSuspiciousPacketDump) {
if(myGlobals.pcap_file_list == NULL)
safe_snprintf(__FILE__, __LINE__, myName, sizeof(myName), "%s%cntop-suspicious-pkts.dev%s.pcap",
myGlobals.runningPref.pcapLogBasePath, /* Added by Ola Lundqvist <[email protected]> */
CONST_PATH_SEP,
myGlobals.device[deviceId].uniqueIfName != NULL ?
myGlobals.device[deviceId].uniqueIfName :
myGlobals.device[deviceId].name);
else
safe_snprintf(__FILE__, __LINE__, myName, sizeof(myName), "%s%cntop-suspicious-pkts.pcap",
myGlobals.pcap_file_list,
CONST_PATH_SEP);
myGlobals.device[deviceId].pcapErrDumper = pcap_dump_open(myGlobals.device[deviceId].pcapPtr, myName);
if(myGlobals.device[deviceId].pcapErrDumper == NULL) {
myGlobals.runningPref.enableSuspiciousPacketDump = 0;
traceEvent(CONST_TRACE_ERROR, "pcap_dump_open(..., '%s') failed (suspicious packets)", myName);
traceEvent(CONST_TRACE_INFO, "Continuing without suspicious packet dump");
} else
traceEvent(CONST_TRACE_NOISY, "Saving packets into file %s", myName);
}
} else {
myGlobals.device[deviceId].virtualDevice = 1;
if(column != NULL) column[0] = ':';
}
if((!myGlobals.device[deviceId].virtualDevice)
&& (pcap_lookupnet(myGlobals.device[deviceId].name,
(bpf_u_int32*)&myGlobals.device[deviceId].network.s_addr,
(bpf_u_int32*)&myGlobals.device[deviceId].netmask.s_addr, ebuf) < 0)) {
/* Fix for IP-less interfaces (e.g. bridge)
Courtesy of Diana Eichert <[email protected]>
*/
myGlobals.device[deviceId].network.s_addr = htonl(0);
myGlobals.device[deviceId].netmask.s_addr = htonl(0xFFFFFFFF);
} else {
myGlobals.device[deviceId].network.s_addr = htonl(myGlobals.device[deviceId].network.s_addr);
myGlobals.device[deviceId].netmask.s_addr = htonl(myGlobals.device[deviceId].netmask.s_addr);
}
/* ******************************************* */
if(myGlobals.device[deviceId].netmask.s_addr == 0) {
/* In this case we are using a dump file */
myGlobals.device[deviceId].netmask.s_addr = 0xFFFFFF00; /* dummy */
}
addDeviceNetworkToKnownSubnetList(&myGlobals.device[deviceId]);
if((myGlobals.device[deviceId].network.s_addr == 0) &&
(myGlobals.device[deviceId].netmask.s_addr == 0xFFFFFFFF) ) {
/* Unnumbered interface... */
myGlobals.device[deviceId].numHosts = MAX_SUBNET_HOSTS;
} else {
myGlobals.device[deviceId].numHosts = 0xFFFFFFFF - myGlobals.device[deviceId].netmask.s_addr + 1;
/* Add some room for multicast hosts
* This is an arbitrary guess.
* We use the log function to limit growth for large networks, while the factor of 50
* is designed to ensure a certain minimal # even for smaller networks
*/
myGlobals.device[deviceId].numHosts +=
(int)(ceil(log((double)(0xFFFFFFFF - myGlobals.device[deviceId].netmask.s_addr + 1))+1.0)*50);
}
if(myGlobals.device[deviceId].numHosts > MAX_SUBNET_HOSTS) {
myGlobals.device[deviceId].numHosts = MAX_SUBNET_HOSTS;
traceEvent(CONST_TRACE_WARNING, "Truncated network size (device %s) to %d hosts (real netmask %s)",
myGlobals.device[deviceId].name, myGlobals.device[deviceId].numHosts,
intoa(myGlobals.device[deviceId].netmask));
} else {
traceEvent(CONST_TRACE_NOISY, "Interface '%s' (netmask %s) computed network size is %d hosts",
myGlobals.device[deviceId].name,
intoa(myGlobals.device[deviceId].netmask),
myGlobals.device[deviceId].numHosts);
}
}
/* ********************************************* */
#ifdef INET6
if(!(myGlobals.device[deviceId].dummyDevice || myGlobals.device[deviceId].virtualDevice)) {
u_int8_t netmask_v6;
getLocalHostAddress(&myGlobals.device[deviceId].ifAddr, &netmask_v6, myGlobals.device[deviceId].name);
myGlobals.device[deviceId].v6Addrs = getLocalHostAddressv6(myGlobals.device[deviceId].v6Addrs, myGlobals.device[deviceId].name);
if(myGlobals.device[deviceId].network.s_addr == 0) {
myGlobals.device[deviceId].netmask.s_addr = 0xFFFFFF00;/* /24 */
myGlobals.device[deviceId].network.s_addr = myGlobals.device[deviceId].ifAddr.s_addr
& myGlobals.device[deviceId].netmask.s_addr;
}
}
#endif
mallocLen = 2;
for(i=0; i<myGlobals.numDevices; i++) {
if(myGlobals.device[i].name != NULL)
mallocLen += (int)(strlen(myGlobals.device[i].name) + 2);
}
workDevices = calloc(mallocLen+1, 1);
if(workDevices == NULL)
return;
else
for(i=0; i<myGlobals.numDevices; i++) {
if(myGlobals.device[i].name != NULL) {
int len = (int)strlen(workDevices);
safe_snprintf(__FILE__, __LINE__,
&workDevices[len], mallocLen-len,
"%s%s", (i > 0) ? ", " : "",
myGlobals.device[i].name);
}
}
if(myGlobals.runningPref.devices != NULL)
free(myGlobals.runningPref.devices);
myGlobals.runningPref.devices = workDevices;
/* ********************************************** */
#ifndef WIN32
if(strncmp(myGlobals.device[deviceId].name, "lo", 2)) {
/* Do not care of virtual loopback interfaces */
int k;
char tmpDeviceName[64];
struct in_addr myLocalHostAddress;
if((myGlobals.numDevices < (MAX_NUM_DEVICES-1))
&& strcmp(myGlobals.device[deviceId].name, "none")) {
traceEvent(CONST_TRACE_INFO, "Checking %s for additional devices", myGlobals.device[deviceId].name);
for(k=0; k<=MAX_NUM_DEVICES_VIRTUAL; k++) {
u_int8_t netmask_v6;
safe_snprintf(__FILE__, __LINE__, tmpDeviceName, sizeof(tmpDeviceName), "%s:%d", myGlobals.device[deviceId].name, k);
traceEvent(CONST_TRACE_NOISY, "Checking %s", tmpDeviceName);
if(getLocalHostAddress(&myLocalHostAddress, &netmask_v6, tmpDeviceName) == 0) {
/* The virtual interface exists */
myGlobals.device[myGlobals.numDevices].ifAddr.s_addr = myLocalHostAddress.s_addr;
if(myLocalHostAddress.s_addr == myGlobals.device[deviceId].ifAddr.s_addr)
continue; /* No virtual Interfaces */
myGlobals.device[myGlobals.numDevices].virtualDevice = 1;
myGlobals.device[myGlobals.numDevices].activeDevice = 1;
myGlobals.device[myGlobals.numDevices].humanFriendlyName = strdup(tmpDeviceName);
myGlobals.device[myGlobals.numDevices].name = strdup(tmpDeviceName);
calculateUniqueInterfaceName(myGlobals.numDevices);
myGlobals.numDevices++;
traceEvent(CONST_TRACE_INFO, "Added virtual interface: '%s'", tmpDeviceName);
if(myGlobals.numDevices >= MAX_NUM_DEVICES) {
traceEvent(CONST_TRACE_WARNING, "Stopping scan - no room for additional (virtual) interfaces");
break;
}
}
}
}
}
#endif /* WIN32 */