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sessions.c
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sessions.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"
/* #define SESSION_TRACE_DEBUG 1 */
#define tcp_flags(a, b) ((a & (b)) == (b))
/* ************************************ */
u_int _checkSessionIdx(u_int idx, int actualDeviceId, char* file, int line) {
if(idx > myGlobals.device[actualDeviceId].hosts.actualHashSize) {
traceEvent(CONST_TRACE_ERROR, "Index error idx=%u/deviceId=%d:0-%d @ [%s:%d]",
idx, actualDeviceId,
myGlobals.device[actualDeviceId].hosts.actualHashSize-1,
file, line);
return(0); /* Last resort */
} else
return(idx);
}
/* ************************************ */
void updatePortList(HostTraffic *theHost, int clientPort, int serverPort) {
if(theHost == NULL) return;
if(clientPort >= 0)
addPortToList(theHost, theHost->recentlyUsedClientPorts, clientPort);
if(serverPort >= 0)
addPortToList(theHost, theHost->recentlyUsedServerPorts, serverPort);
}
/* ************************************ */
static void updateHTTPVirtualHosts(char *virtualHostName,
HostTraffic *theRemHost,
TrafficCounter bytesSent, TrafficCounter bytesRcvd) {
if((virtualHostName != NULL)
&& (strlen(virtualHostName) > 3) /* Sanity */
) {
VirtualHostList *list;
int numEntries = 0;
if(theRemHost->protocolInfo == NULL) {
theRemHost->protocolInfo = (ProtocolInfo*)malloc(sizeof(ProtocolInfo));
memset(theRemHost->protocolInfo, 0, sizeof(ProtocolInfo));
}
list = theRemHost->protocolInfo->httpVirtualHosts;
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "updateHTTPVirtualHosts: %s for host %s [s=%u,r=%u]",
virtualHostName, theRemHost->hostNumIpAddress,
(unsigned int)bytesSent.value, (unsigned int)bytesRcvd.value);
#endif
while(list != NULL) {
if(strcmp(list->virtualHostName, virtualHostName) == 0) {
incrementTrafficCounter(&list->bytesSent, bytesSent.value),
incrementTrafficCounter(&list->bytesRcvd, bytesRcvd.value);
break;
} else {
list = list->next;
numEntries++;
}
}
if((list == NULL) && (numEntries < MAX_NUM_LIST_ENTRIES)) {
list = (VirtualHostList*)malloc(sizeof(VirtualHostList));
list->virtualHostName = strdup(virtualHostName);
list->bytesSent = bytesSent, list->bytesRcvd = bytesRcvd;
list->next = theRemHost->protocolInfo->httpVirtualHosts;
theRemHost->protocolInfo->httpVirtualHosts = list;
}
}
}
/* ************************************ */
void updateHostUsers(char *userName, int userType, HostTraffic *theHost) {
int i;
if(userName[0] == '\0') return;
/* Convert to lowercase */
for(i=(int)strlen(userName)-1; i>=0; i--) userName[i] = tolower(userName[i]);
if(isSMTPhost(theHost)) {
/*
If this is a SMTP server the local users are
not really meaningful
*/
if((theHost->protocolInfo != NULL)
&& (theHost->protocolInfo->userList != NULL)) {
UserList *list = theHost->protocolInfo->userList;
/*
It might be that ntop added users before it
realized this host was a SMTP server. They must
be removed.
*/
while(list != NULL) {
UserList *next = list->next;
free(list->userName);
free(list);
list = next;
}
theHost->protocolInfo->userList = NULL;
}
return; /* That's all for now */
}
if(userName != NULL) {
UserList *list;
int numEntries = 0;
if(theHost->protocolInfo == NULL) theHost->protocolInfo = calloc(1, sizeof(ProtocolInfo));
list = theHost->protocolInfo->userList;
while(list != NULL) {
if(strcmp(list->userName, userName) == 0) {
FD_SET(userType, &list->userFlags);
return; /* Nothing to do: this user is known */
} else {
list = list->next;
numEntries++;
}
}
if((list == NULL) && (numEntries < MAX_NUM_LIST_ENTRIES)) {
list = (UserList*)malloc(sizeof(UserList));
list->userName = strdup(userName);
list->next = theHost->protocolInfo->userList;
FD_ZERO(&list->userFlags);
FD_SET(userType, &list->userFlags);
theHost->protocolInfo->userList = list;
}
}
}
/* ************************************ */
void updateUsedPorts(HostTraffic *srcHost,
HostTraffic *dstHost,
u_short sport,
u_short dport,
u_int length) {
if(length > 0) {
u_short clientPort, serverPort;
PortUsage *ports;
int sport_idx = mapGlobalToLocalIdx(sport);
int dport_idx = mapGlobalToLocalIdx(dport);
/* Now let's update the list of ports recently used by the hosts */
if((sport > dport) || broadcastHost(dstHost)) {
clientPort = sport, serverPort = dport;
if(sport_idx == -1) addPortToList(srcHost, srcHost->otherIpPortsSent, sport);
if(dport_idx == -1) addPortToList(dstHost, dstHost->otherIpPortsRcvd, dport);
if(srcHost != myGlobals.otherHostEntry)
updatePortList(srcHost, clientPort, -1);
if(dstHost != myGlobals.otherHostEntry)
updatePortList(dstHost, -1, serverPort);
} else {
clientPort = dport, serverPort = sport;
if(srcHost != myGlobals.otherHostEntry)
updatePortList(srcHost, -1, serverPort);
if(dstHost != myGlobals.otherHostEntry)
updatePortList(dstHost, clientPort, -1);
}
/* **************** */
if(/* (srcHost == dstHost) || */
broadcastHost(srcHost) || broadcastHost(dstHost))
return;
if(sport < MAX_ASSIGNED_IP_PORTS) {
ports = getPortsUsage(srcHost, sport, 1);
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: Adding svr peer %u", dstHost->hostTrafficBucket);
#endif
incrementTrafficCounter(&ports->serverTraffic, length);
ports->serverUses++, ports->serverUsesLastPeer = dstHost->serialHostIndex;
ports = getPortsUsage(dstHost, sport, 1);
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: Adding client peer %u", dstHost->hostTrafficBucket);
#endif
incrementTrafficCounter(&ports->clientTraffic, length);
ports->clientUses++, ports->clientUsesLastPeer = srcHost->serialHostIndex;
}
if(dport < MAX_ASSIGNED_IP_PORTS) {
ports = getPortsUsage(srcHost, dport, 1);
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: Adding client peer %u", dstHost->hostTrafficBucket);
#endif
incrementTrafficCounter(&ports->clientTraffic, length);
ports->clientUses++, ports->clientUsesLastPeer = dstHost->serialHostIndex;
ports = getPortsUsage(dstHost, dport, 1);
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: Adding svr peer %u", srcHost->hostTrafficBucket);
#endif
incrementTrafficCounter(&ports->serverTraffic, length);
ports->serverUses++, ports->serverUsesLastPeer = srcHost->serialHostIndex;
}
}
}
/* ************************************ */
void freeOpenDPI(IPSession *sessionToPurge) {
#ifdef DEBUG
if(myGlobals.ntopRunState >= FLAG_NTOPSTATE_RUN)
traceEvent(CONST_TRACE_WARNING, "freeOpenDPI(%p)", sessionToPurge);
#endif
if(sessionToPurge->l7.flow != NULL) {
if(sessionToPurge->l7.src != NULL) {
free(sessionToPurge->l7.src);
sessionToPurge->l7.src = NULL;
}
if(sessionToPurge->l7.dst != NULL) {
free(sessionToPurge->l7.dst);
sessionToPurge->l7.dst = NULL;
}
free(sessionToPurge->l7.flow);
sessionToPurge->l7.flow = NULL;
}
}
/* ************************************ */
void freeSession(IPSession *sessionToPurge, int actualDeviceId,
u_char allocateMemoryIfNeeded,
u_char lockMutex /* unused so far */) {
/* Session to purge */
#ifdef DEBUG
if(myGlobals.ntopRunState >= FLAG_NTOPSTATE_RUN)
traceEvent(CONST_TRACE_WARNING, "freeSession(%p)", sessionToPurge);
#endif
notifyEvent(sessionDeletion, NULL, sessionToPurge, 0);
if(sessionToPurge->magic != CONST_MAGIC_NUMBER) {
traceEvent(CONST_TRACE_ERROR, "Bad magic number (expected=%d/real=%d) freeSession()",
CONST_MAGIC_NUMBER, sessionToPurge->magic);
return;
}
if((sessionToPurge->initiator == NULL) || (sessionToPurge->remotePeer == NULL)) {
traceEvent(CONST_TRACE_ERROR, "Either initiator or remote peer is NULL");
return;
} else {
sessionToPurge->initiator->numHostSessions--, sessionToPurge->remotePeer->numHostSessions--;
}
if(((sessionToPurge->bytesProtoSent.value == 0)
|| (sessionToPurge->bytesProtoRcvd.value == 0))
&& ((sessionToPurge->clientNwDelay.tv_sec != 0) || (sessionToPurge->clientNwDelay.tv_usec != 0)
|| (sessionToPurge->serverNwDelay.tv_sec != 0) || (sessionToPurge->serverNwDelay.tv_usec != 0)
)
/*
"Valid" TCP session used to skip faked sessions (e.g. portscans
with one faked packet + 1 response [RST usually])
*/
) {
HostTraffic *theHost, *theRemHost;
char *fmt = "Detected TCP connection with no data exchanged "
"[%s:%d] -> [%s:%d] (pktSent=%d/pktRcvd=%d) (network mapping attempt?)";
theHost = sessionToPurge->initiator, theRemHost = sessionToPurge->remotePeer;
if((theHost != NULL) && (theRemHost != NULL) && allocateMemoryIfNeeded) {
allocateSecurityHostPkts(theHost);
incrementUsageCounter(&theHost->secHostPkts->closedEmptyTCPConnSent, theRemHost, actualDeviceId);
incrementUsageCounter(&theHost->secHostPkts->terminatedTCPConnServer, theRemHost, actualDeviceId);
allocateSecurityHostPkts(theRemHost);
incrementUsageCounter(&theRemHost->secHostPkts->closedEmptyTCPConnRcvd, theHost, actualDeviceId);
incrementUsageCounter(&theRemHost->secHostPkts->terminatedTCPConnClient, theHost, actualDeviceId);
incrementTrafficCounter(&myGlobals.device[actualDeviceId].securityPkts.closedEmptyTCPConn, 1);
incrementTrafficCounter(&myGlobals.device[actualDeviceId].securityPkts.terminatedTCPConn, 1);
if(myGlobals.runningPref.enableSuspiciousPacketDump)
traceEvent(CONST_TRACE_WARNING, fmt,
theHost->hostResolvedName, sessionToPurge->sport,
theRemHost->hostResolvedName, sessionToPurge->dport,
sessionToPurge->pktSent, sessionToPurge->pktRcvd);
}
}
#ifdef SESSION_TRACE_DEBUG
{
char buf[32], buf1[32];
traceEvent(CONST_TRACE_INFO, "SESSION_TRACE_DEBUG: Session terminated: %s:%d <-> %s:%d (lastSeend=%d) (# sessions = %d)",
_addrtostr(&sessionToPurge->initiatorRealIp, buf, sizeof(buf)), sessionToPurge->sport,
_addrtostr(&sessionToPurge->remotePeerRealIp, buf1, sizeof(buf1)), sessionToPurge->dport,
sessionToPurge->lastSeen, myGlobals.device[actualDeviceId].numSessions-1);
}
#endif
/*
* Having updated the session information, 'theSession'
* can now be purged.
*/
if(sessionToPurge->virtualPeerName != NULL)
free(sessionToPurge->virtualPeerName);
if(sessionToPurge->session_info != NULL)
free(sessionToPurge->session_info);
myGlobals.numTerminatedSessions++;
myGlobals.device[actualDeviceId].numSessions--;
freeOpenDPI(sessionToPurge);
/* Flag in delete process */
memset(sessionToPurge, 0, sizeof(IPSession));
sessionToPurge->magic = CONST_UNMAGIC_NUMBER;
free(sessionToPurge);
}
/* ************************************ */
/*
Description:
This function is called periodically to free
those sessions that have been inactive for
too long.
*/
/* #define DEBUG */
void scanTimedoutTCPSessions(int actualDeviceId) {
u_int idx, freeSessionCount = 0, tot_sessions = 0;
/* Patch below courtesy of "Kouprie, Robbert" <[email protected]> */
if((!myGlobals.runningPref.enableSessionHandling)
|| (myGlobals.device[actualDeviceId].sessions == NULL)
|| (myGlobals.device[actualDeviceId].numSessions == 0))
return;
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: Called scanTimedoutTCPSessions (device=%d, sessions=%d)",
actualDeviceId, myGlobals.device[actualDeviceId].numSessions);
#endif
/*
NOTE
We need to scan all session and not just a part of them as we need to make
sure we have freed sessions whose peers were previously marked for deletion
in purgeIdleHosts(int actDevice);
*/
for(idx=0; idx<MAX_TOT_NUM_SESSIONS; idx++) {
IPSession *nextSession, *prevSession, *headSession;
int mutex_idx;
if(myGlobals.device[actualDeviceId].sessions[idx] == NULL) continue;
mutex_idx = idx % NUM_SESSION_MUTEXES;
accessMutex(&myGlobals.sessionsMutex[mutex_idx], "purgeIdleHosts");
prevSession = NULL, headSession = myGlobals.device[actualDeviceId].sessions[idx];
while(headSession != NULL) {
u_char free_session;
tot_sessions++;
if(headSession->magic != CONST_MAGIC_NUMBER) {
myGlobals.device[actualDeviceId].numSessions--;
traceEvent(CONST_TRACE_ERROR, "Bad magic number (expected=%d/real=%d) scanTimedoutTCPSessions() [idx=%u][head=%p][session=%p]",
CONST_MAGIC_NUMBER, headSession->magic, idx, myGlobals.device[actualDeviceId].sessions[idx], headSession);
headSession = NULL;
continue;
}
free_session = 0;
if(
/* One of the session peers has been marked for deletion */
(headSession->initiator->magic == CONST_UNMAGIC_NUMBER)
|| (headSession->remotePeer->magic == CONST_UNMAGIC_NUMBER)
|| ((headSession->sessionState == FLAG_STATE_TIMEOUT)
&& ((headSession->lastSeen+CONST_TWO_MSL_TIMEOUT) < myGlobals.actTime))
|| /* The branch below allows to flush sessions which have not been
terminated properly (we've received just one FIN (not two). It might be
that we've lost some packets (hopefully not). */
((headSession->sessionState >= FLAG_STATE_FIN1_ACK0)
&& ((headSession->lastSeen+CONST_DOUBLE_TWO_MSL_TIMEOUT) < myGlobals.actTime))
/* The line below allows to avoid keeping very old sessions that
might be still open, but that are probably closed and we've
lost some packets */
|| ((headSession->lastSeen+PARM_HOST_PURGE_MINIMUM_IDLE_ACTVSES) < myGlobals.actTime)
|| ((headSession->lastSeen+PARM_SESSION_PURGE_MINIMUM_IDLE) < myGlobals.actTime)
/* Purge sessions that are not yet active and that have not completed
the 3-way handshave within 1 minute */
|| ((headSession->sessionState < FLAG_STATE_ACTIVE) && ((headSession->lastSeen+60) < myGlobals.actTime))
/* Purge active sessions where one of the two peers has not sent any data
(it might be that ntop has created the session bucket because it has
thought that the session was already started) since 120 seconds */
|| ((headSession->sessionState >= FLAG_STATE_ACTIVE)
&& ((headSession->bytesSent.value == 0) || (headSession->bytesRcvd.value == 0))
&& ((headSession->lastSeen+120) < myGlobals.actTime))
) {
free_session = 1;
} else /* This session will NOT be freed */ {
free_session = 0;
}
nextSession = headSession->next;
if(free_session) {
if(myGlobals.device[actualDeviceId].sessions[idx] == headSession) {
myGlobals.device[actualDeviceId].sessions[idx] = nextSession, prevSession = NULL;
} else {
if(prevSession)
prevSession->next = nextSession;
else
traceEvent(CONST_TRACE_ERROR, "Internal error: pointer inconsistency");
}
freeSessionCount++;
freeSession(headSession, actualDeviceId, 1, 0 /* locked by the purge thread */);
} else {
/* This session is not for free */
prevSession = headSession;
}
headSession = nextSession;
} /* while */
releaseMutex(&myGlobals.sessionsMutex[mutex_idx]);
} /* end for */
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: scanTimedoutTCPSessions: freed %u sessions [total: %u sessions]",
freeSessionCount, tot_sessions);
#endif
}
/* #undef DEBUG */
/* *********************************** */
void freeDeviceSessions(int actualDeviceId) {
u_int idx, freeSessionCount = 0;
/* Patch below courtesy of "Kouprie, Robbert" <[email protected]> */
if((!myGlobals.runningPref.enableSessionHandling)
|| (myGlobals.device[actualDeviceId].sessions == NULL)
|| (myGlobals.device[actualDeviceId].numSessions == 0))
return;
traceEvent(CONST_TRACE_ALWAYSDISPLAY, "freeDeviceSessions() called for device %d", actualDeviceId);
for(idx=0; idx<MAX_TOT_NUM_SESSIONS; idx++) {
IPSession *nextSession, *prevSession, *headSession;
if(myGlobals.device[actualDeviceId].sessions[idx] == NULL) continue;
prevSession = NULL, headSession = myGlobals.device[actualDeviceId].sessions[idx];
while(headSession != NULL) {
nextSession = headSession->next;
if(myGlobals.device[actualDeviceId].sessions[idx] == headSession) {
myGlobals.device[actualDeviceId].sessions[idx] = nextSession, prevSession = NULL;
} else {
if(prevSession)
prevSession->next = nextSession;
else
traceEvent(CONST_TRACE_ERROR, "Internal error: pointer inconsistency");
}
freeSessionCount++;
freeSession(headSession, actualDeviceId, 1, 0 /* locked by the purge thread */);
headSession = nextSession;
} /* while */
} /* end for */
//#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: freeDeviceSessions: freed %u sessions",
freeSessionCount);
//#endif
}
/* *********************************** */
static void handleFTPSession(const struct pcap_pkthdr *h,
HostTraffic *srcHost, u_short sport,
HostTraffic *dstHost, u_short dport,
u_int packetDataLength, u_char* packetData,
IPSession *theSession,
int actualDeviceId) {
char *rcStr;
if(sport == IP_TCP_PORT_FTP)
setHostFlag(FLAG_HOST_TYPE_SVC_FTP, srcHost);
else
setHostFlag(FLAG_HOST_TYPE_SVC_FTP, dstHost);
if(((theSession->bytesProtoRcvd.value < 64)
|| (theSession->bytesProtoSent.value < 64))
/* The sender name is sent at the beginning of the communication */
&& (packetDataLength > 7)) {
if((rcStr = (char*)malloc(packetDataLength+1)) == NULL) {
traceEvent (CONST_TRACE_WARNING, "handleFTPSession: Unable to "
"allocate memory, FTP Session handling incomplete\n");
return;
}
memcpy(rcStr, packetData, packetDataLength);
rcStr[packetDataLength-2] = '\0';
if((strncmp(rcStr, "USER ", 5) == 0) && strcmp(&rcStr[5], "anonymous")) {
if(sport == 21)
updateHostUsers(&rcStr[5], BITFLAG_FTP_USER, dstHost);
else
updateHostUsers(&rcStr[5], BITFLAG_FTP_USER, srcHost);
#ifdef FTP_DEBUG
printf("FTP_DEBUG: %s:%d->%s:%d [%s]\n",
srcHost->hostNumIpAddress, sport, dstHost->hostNumIpAddress, dport,
&rcStr[5]);
#endif
}
free(rcStr);
}
}
/* *********************************** */
static void handleSMTPSession (const struct pcap_pkthdr *h,
HostTraffic *srcHost, u_short sport,
HostTraffic *dstHost, u_short dport,
u_int packetDataLength, u_char* packetData,
IPSession *theSession, int actualDeviceId) {
char *rcStr;
if(sport == IP_TCP_PORT_SMTP)
setHostFlag(FLAG_HOST_TYPE_SVC_SMTP, srcHost);
else
setHostFlag(FLAG_HOST_TYPE_SVC_SMTP, dstHost);
if(((theSession->bytesProtoRcvd.value < 64)
|| (theSession->bytesProtoSent.value < 64))
/* The sender name is sent at the beginning of the communication */
&& (packetDataLength > 7)) {
int beginIdx = 11, i;
if((rcStr = (char*)malloc(packetDataLength+1)) == NULL) {
traceEvent (CONST_TRACE_WARNING, "handleSMTPSession: Unable to "
"allocate memory, SMTP Session handling incomplete\n");
return;
}
memcpy(rcStr, packetData, packetDataLength-1);
rcStr[packetDataLength-1] = '\0';
#ifdef SMTP_DEBUG
traceEvent (CONST_TRACE_INFO, "SMTP: %s", rcStr);
#endif
if(strncasecmp(rcStr, "MAIL FROM:", 10) == 0) {
if(iscntrl(rcStr[strlen(rcStr)-1])) rcStr[strlen(rcStr)-1] = '\0';
rcStr[strlen(rcStr)-1] = '\0';
if(rcStr[beginIdx] == '<') beginIdx++;
i=beginIdx+1;
while(rcStr[i] != '\0') {
if(rcStr[i] == '>') {
rcStr[i] = '\0';
break;
}
i++;
}
if(sport == 25)
updateHostUsers(&rcStr[beginIdx], BITFLAG_SMTP_USER, dstHost);
else
updateHostUsers(&rcStr[beginIdx], BITFLAG_SMTP_USER, srcHost);
#ifdef SMTP_DEBUG
printf("SMTP_DEBUG: %s:%d->%s:%d [%s]\n",
srcHost->hostNumIpAddress, sport, dstHost->hostNumIpAddress, dport,
&rcStr[beginIdx]);
#endif
}
free(rcStr);
}
}
/* *********************************** */
static void handlePOPSession (const struct pcap_pkthdr *h,
HostTraffic *srcHost, u_short sport,
HostTraffic *dstHost, u_short dport,
u_int packetDataLength, u_char* packetData,
IPSession *theSession, int actualDeviceId) {
char *rcStr;
if((sport == IP_TCP_PORT_POP2) || (sport == IP_TCP_PORT_POP3))
setHostFlag(FLAG_HOST_TYPE_SVC_POP, srcHost);
else
setHostFlag(FLAG_HOST_TYPE_SVC_POP, dstHost);
if(((theSession->bytesProtoRcvd.value < 64)
|| (theSession->bytesProtoSent.value < 64)) /* The user name is sent at the beginning of the communication */
&& (packetDataLength > 4)) {
if((rcStr = (char*)malloc(packetDataLength+1)) == NULL) {
traceEvent (CONST_TRACE_WARNING, "handlePOPSession: Unable to "
"allocate memory, POP Session handling incomplete\n");
return;
}
memcpy(rcStr, packetData, packetDataLength);
rcStr[packetDataLength-1] = '\0';
if(strncmp(rcStr, "USER ", 5) == 0) {
if(iscntrl(rcStr[strlen(rcStr)-1])) rcStr[strlen(rcStr)-1] = '\0';
if((sport == 109) || (sport == 110))
updateHostUsers(&rcStr[5], BITFLAG_POP_USER, dstHost);
else
updateHostUsers(&rcStr[5], BITFLAG_POP_USER, srcHost);
#ifdef POP_DEBUG
printf("POP_DEBUG: %s->%s [%s]\n",
srcHost->hostNumIpAddress, dstHost->hostNumIpAddress,
&rcStr[5]);
#endif
}
free(rcStr);
}
}
/* *********************************** */
static void handleIMAPSession (const struct pcap_pkthdr *h,
HostTraffic *srcHost, u_short sport,
HostTraffic *dstHost, u_short dport,
u_int packetDataLength, u_char* packetData,
IPSession *theSession, int actualDeviceId) {
char *rcStr;
if(sport == IP_TCP_PORT_IMAP)
setHostFlag(FLAG_HOST_TYPE_SVC_IMAP, srcHost);
else
setHostFlag(FLAG_HOST_TYPE_SVC_IMAP, dstHost);
if(((theSession->bytesProtoRcvd.value < 64)
|| (theSession->bytesProtoSent.value < 64))
/* The sender name is sent at the beginning of the communication */
&& (packetDataLength > 7)) {
if((rcStr = (char*)malloc(packetDataLength+1)) == NULL) {
traceEvent (CONST_TRACE_WARNING, "handleIMAPSession: Unable to "
"allocate memory, IMAP Session handling incomplete\n");
return;
}
memcpy(rcStr, packetData, packetDataLength);
rcStr[packetDataLength-1] = '\0';
if(strncmp(rcStr, "2 login ", 8) == 0) {
int beginIdx = 10;
while(rcStr[beginIdx] != '\0') {
if(rcStr[beginIdx] == '\"') {
rcStr[beginIdx] = '\0';
break;
}
beginIdx++;
}
if(sport == 143)
updateHostUsers(&rcStr[9], BITFLAG_IMAP_USER, dstHost);
else
updateHostUsers(&rcStr[9], BITFLAG_IMAP_USER, srcHost);
#ifdef IMAP_DEBUG
printf("IMAP_DEBUG: %s:%d->%s:%d [%s]\n",
srcHost->hostNumIpAddress, sport, dstHost->hostNumIpAddress, dport,
&rcStr[9]);
#endif
}
free(rcStr);
}
}
/* *********************************** */
typedef struct {
u_int16_t src_call, dst_call; /* Together they form the callId */
u_int32_t timestamp;
u_int8_t outbound_seq_num, inbound_seq_num;
u_int8_t frame_class /* 2 = voice */, frame_subclass;
/* Payload */
} IAX2Header;
#define IAX2_STR_LEN 32
typedef struct {
u_int8_t element_id, element_len;
char element_data[IAX2_STR_LEN];
} IAX2PayloadElement;
/* IAX2 packets courtesy of [email protected] */
static void handleAsteriskSession(const struct pcap_pkthdr *h,
HostTraffic *srcHost, u_short sport,
HostTraffic *dstHost, u_short dport,
u_int packetDataLength, u_char* packetData,
IPSession *theSession, int actualDeviceId) {
u_char debug = 0;
if(packetDataLength > sizeof(IAX2Header)) {
IAX2Header *header = (IAX2Header*)packetData;
u_int16_t pkt_shift;
if(debug) {
traceEvent(CONST_TRACE_WARNING, "-------------------------");
traceEvent(CONST_TRACE_WARNING, "[Class=%d][SubClass=%d]", header->frame_class, header->frame_subclass);
}
if(header->frame_class == 6) /* IAX */ {
char caller_name[IAX2_STR_LEN] = { '\0' };
char caller_num[IAX2_STR_LEN] = { '\0' };
char called_num[IAX2_STR_LEN] = { '\0' };
char username[IAX2_STR_LEN] = { '\0' };
pkt_shift = sizeof(IAX2Header);
while(packetDataLength > (pkt_shift + 2 /* element_id+element_len */)) {
IAX2PayloadElement *pe = (IAX2PayloadElement*)&packetData[pkt_shift];
char tmpStr[IAX2_STR_LEN] = { '\0' };
u_short len;
if(pe->element_len >= (sizeof(tmpStr)-1))
len = sizeof(tmpStr)-2;
else
len = pe->element_len;
memcpy(tmpStr, pe->element_data, len);
switch(pe->element_id) {
case 1: /* Called Number */
strcpy(called_num, tmpStr);
break;
case 2: /* Calling Number */
strcpy(caller_num, tmpStr);
break;
case 4: /* Caller Name */
strcpy(caller_name, tmpStr);
break;
case 6: /* UserName (used for authentication) */
strcpy(username, tmpStr);
break;
case 13: /* Original Number Being Called */
break;
}
if(debug) traceEvent(CONST_TRACE_WARNING, "\t[Id=%d][Len=%d][%s]",
pe->element_id, pe->element_len, tmpStr);
pkt_shift += (pe->element_len+2);
} /* while */
if(debug) {
traceEvent(CONST_TRACE_WARNING, "-------------------------");
}
if(username[0] != '\0') updateHostUsers(username, BITFLAG_VOIP_USER, srcHost);
if(((theSession->session_info == NULL) || (theSession->session_info[0] == '\0'))
&& (caller_name[0] != '\0')
&& (called_num[0] != '\0')) {
char logStr[256];
setHostFlag(FLAG_HOST_TYPE_SVC_VOIP_CLIENT, srcHost);
setHostFlag(FLAG_HOST_TYPE_SVC_VOIP_GATEWAY, dstHost);
safe_snprintf(__FILE__, __LINE__, logStr, sizeof(logStr),
"%s <%s> -> <%s>",
caller_name, caller_num, called_num);
theSession->session_info = strdup(logStr);
}
}
}
}
/* *********************************** */
#define SIP_INVITE "INVITE" /* User Info */
#define SIP_OK "SIP/2.0 200 Ok" /* Stream Info */
static void handleSIPSession(const struct pcap_pkthdr *h,
HostTraffic *srcHost, u_short sport,
HostTraffic *dstHost, u_short dport,
u_int packetDataLength, u_char* packetData,
IPSession *theSession, int actualDeviceId) {
char *rcStr;
if(packetDataLength > 64) {
if((!strncasecmp((char*)packetData, SIP_INVITE, strlen(SIP_INVITE)))
|| (!strncasecmp((char*)packetData, SIP_OK, strlen(SIP_OK)))) {
char *row, *strtokState, *from = NULL, *to = NULL,
*server = NULL, *audio = NULL, *video = NULL;
if((rcStr = (char*)malloc(packetDataLength+1)) == NULL) {
traceEvent(CONST_TRACE_WARNING, "handleSIPSession: Unable to "
"allocate memory, SIP Session handling incomplete\n");
return;
}
memcpy(rcStr, packetData, packetDataLength);
rcStr[packetDataLength-1] = '\0';
row = strtok_r((char*)rcStr, "\r\n", &strtokState);
while(row != NULL) {
if((from == NULL)
&& ((!strncmp(row, "From: ", 6)) || (!strncmp(row, "f: ", 3)))) {
from = row;
} else if((to == NULL)
&& ((!strncmp(row, "To: ", 4)) || (!strncmp(row, "t: ", 3)))) {
to = row;
} else if((server == NULL) && (!strncmp(row, "Server: ", 8))) {
server = row;
} else if((audio == NULL) && (!strncmp(row, "m=audio ", 8))) {
audio = row;
} else if((video == NULL) && (!strncmp(row, "m=video ", 8))) {
video = row;
}
row = strtok_r(NULL, "\r\n", &strtokState);
}
if(server) {
strtok_r(server, ":", &strtokState);
server = strtok_r(NULL, ":", &strtokState);
#ifdef SIP_DEBUG
traceEvent (CONST_TRACE_WARNING, "Server '%s'", server);
#endif
}
if(from && to && (!strncasecmp((char*)packetData, SIP_INVITE, strlen(SIP_INVITE)))) {
strtok_r(from, ":", &strtokState);
strtok_r(NULL, ":\"", &strtokState);
from = strtok_r(NULL, "\"@>", &strtokState);
strtok_r(to, ":", &strtokState);
strtok_r(NULL, "\":", &strtokState);
to = strtok_r(NULL, "\"@>", &strtokState);
#ifdef SIP_DEBUG
traceEvent (CONST_TRACE_WARNING, "'%s'->'%s'", from, to);
#endif
updateHostUsers(from, BITFLAG_VOIP_USER, srcHost);
updateHostUsers(to, BITFLAG_VOIP_USER, dstHost);
if(theSession->session_info == NULL) {
char tmpStr[256];
safe_snprintf(__FILE__, __LINE__, tmpStr, sizeof(tmpStr), "%s called %s", from, to);
theSession->session_info = strdup(tmpStr);
}
}
if(audio) {
strtok_r(audio, " ", &strtokState);
audio = strtok_r(NULL, " ", &strtokState);
#ifdef SIP_DEBUG
traceEvent (CONST_TRACE_WARNING, "RTP '%s:%s'", srcHost->hostNumIpAddress, audio);
#endif
/* FIX: we need to handle IPv6 at some point */
addVoIPSessionInfo(&srcHost->hostIpAddress, atoi(audio), theSession->session_info);
}
if(video) {
strtok_r(video, " ", &strtokState);
video = strtok_r(NULL, " ", &strtokState);
#ifdef SIP_DEBUG
traceEvent (CONST_TRACE_WARNING, "RTP '%s:%s'", srcHost->hostNumIpAddress, video);
#endif
addVoIPSessionInfo(&srcHost->hostIpAddress, atoi(video), theSession->session_info);
}
if(server != NULL)
setHostFlag(FLAG_HOST_TYPE_SVC_VOIP_GATEWAY, srcHost);
else
setHostFlag(FLAG_HOST_TYPE_SVC_VOIP_CLIENT, srcHost);
free(rcStr);
}
}
}
/* *********************************** */
static void handleSCCPSession(const struct pcap_pkthdr *h,
HostTraffic *srcHost, u_short sport,
HostTraffic *dstHost, u_short dport,
u_int packetDataLength, u_char* packetData,
IPSession *theSession, int actualDeviceId) {
char *rcStr;
if(packetDataLength > 64) {
u_int16_t message_id;
/* NOTE: message_id is coded in little endian */
memcpy(&message_id, &packetData[8], sizeof(message_id));
#ifdef CFG_BIG_ENDIAN
message_id = ntohs(message_id);
#endif
if((message_id == 0x8F /* CallInfoMessage */)
&& (packetDataLength > 200)) {
char *calling_party_name, *calling_party;
char *called_party_name, *called_party;
char caller[2048], called[2048];
if((rcStr = (char*)malloc(packetDataLength+1)) == NULL) {
traceEvent(CONST_TRACE_WARNING, "handleSCCPSession: Unable to "
"allocate memory, SCCP Session handling incomplete\n");
return;
}
memcpy(rcStr, packetData, packetDataLength);
rcStr[packetDataLength-1] = '\0';
calling_party_name = &rcStr[12];
calling_party = &rcStr[12+40];
called_party_name = &rcStr[12+40+24];
called_party = &rcStr[12+40+24+40];
#ifdef SCCP_DEBUG
traceEvent(CONST_TRACE_WARNING, "SCCP: msg_id='%u'", message_id);
traceEvent(CONST_TRACE_WARNING, "SCCP: calling_party_name='%s'", calling_party_name);
traceEvent(CONST_TRACE_WARNING, "SCCP: calling_party='%s'", calling_party);
traceEvent(CONST_TRACE_WARNING, "SCCP: called_party_name='%s'", called_party_name);
traceEvent(CONST_TRACE_WARNING, "SCCP: called_party='%s'", called_party);
#endif
if(calling_party_name[0] != '\0')
safe_snprintf(__FILE__, __LINE__, caller, sizeof(caller), "%s <%s>", calling_party_name, calling_party);