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util.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 <stdarg.h>
#ifndef WIN32
#include <syslog.h>
#endif
#ifndef HAVE_GETOPT_LONG
#include "./utils/getopt/getopt.c"
#include "./utils/getopt/getopt1.c"
#endif
/* #define ADDRESS_DEBUG */
/* #define FINGERPRINT_DEBUG */
/* FTP */
static SessionInfo *passiveSessions = NULL;
static u_short passiveSessionsLen;
/* VoIP */
static SessionInfo *voipSessions = NULL;
static u_short voipSessionsLen;
static char *versionSite[] = {
CONST_VERSIONCHECK_SITE,
NULL
};
/* ************************************ */
static HostTraffic* __getFirstHost(u_int actualDeviceId, u_int beginIdx, char *file, int line) {
u_int idx;
accessMutex(&myGlobals.hostsHashLockMutex, "__getFirstHost");
for(idx=beginIdx; idx<myGlobals.device[actualDeviceId].hosts.actualHashSize; idx++) {
HostTraffic *el = myGlobals.device[actualDeviceId].hosts.hash_hostTraffic[idx];
while(el != NULL) {
if(broadcastHost(el) || (el == myGlobals.otherHostEntry)) {
el = el->next;
} else {
if(el->magic != CONST_MAGIC_NUMBER) {
traceEvent(CONST_TRACE_ERROR,
"Bad magic number [expected=%d/real=%d][deviceId=%d] getFirstHost()[%s/%d]",
CONST_MAGIC_NUMBER, el->magic, actualDeviceId, file, line);
releaseMutex(&myGlobals.hostsHashLockMutex);
return(NULL);
}
if(!is_host_ready_to_purge(actualDeviceId, el, time(NULL))) {
/* Do not return hosts that will soon be purged off memory */
releaseMutex(&myGlobals.hostsHashLockMutex);
return(el);
} else {
el = el->next;
}
}
}
}
releaseMutex(&myGlobals.hostsHashLockMutex);
return(NULL);
}
/* ************************************ */
HostTraffic* _getFirstHost(u_int actualDeviceId, char *file, int line) {
return(__getFirstHost(actualDeviceId, 0 /* FIRST_HOSTS_ENTRY */, file, line));
}
/* ************************************ */
HostTraffic* _getNextHost(u_int actualDeviceId, HostTraffic *host, char *file, int line) {
u_int nextIdx;
time_t now = time(NULL);
accessMutex(&myGlobals.hostsHashLockMutex, "getNextHost");
if((host == NULL) || (host->magic != CONST_MAGIC_NUMBER)) {
releaseMutex(&myGlobals.hostsHashLockMutex);
return(NULL);
}
nextIdx = host->hostTrafficBucket+1;
while(host->next != NULL) {
if(host->next->magic != CONST_MAGIC_NUMBER) {
traceEvent(CONST_TRACE_ERROR, "Bad magic number (expected=%d/real=%d) getNextHost()[%s/%d]",
CONST_MAGIC_NUMBER, host->next->magic, file, line);
releaseMutex(&myGlobals.hostsHashLockMutex);
return(NULL);
}
if(!is_host_ready_to_purge(actualDeviceId, host->next, now)) {
releaseMutex(&myGlobals.hostsHashLockMutex);
return(host->next);
} else
host = host->next;
}
/* No host has been found: move to next bucket */
releaseMutex(&myGlobals.hostsHashLockMutex);
if(nextIdx < myGlobals.device[actualDeviceId].hosts.actualHashSize)
return(__getFirstHost(actualDeviceId, nextIdx, file, line));
else
return(NULL);
}
/* ************************************ */
HostTraffic* findHostByNumIP(HostAddr hostIpAddress, short vlanId, u_int actualDeviceId) {
HostTraffic *el;
u_int idx = hashHost(&hostIpAddress, NULL, &el, actualDeviceId);
if(el != NULL)
return(el); /* Found */
else if(idx == FLAG_NO_PEER)
return(NULL);
else
el = myGlobals.device[actualDeviceId].hosts.hash_hostTraffic[idx];
for(; el != NULL; el = el->next) {
if((el->hostNumIpAddress != NULL) && (addrcmp(&el->hostIpAddress,&hostIpAddress) == 0)) {
if((vlanId > 0) && (el->vlanId != vlanId)) continue;
return(el);
}
}
if(el == NULL) {
/*
Fallback:
probably a local host has been searched using an IP
address (we should have used a MAC)
*/
for(idx=0; idx<myGlobals.device[actualDeviceId].hosts.actualHashSize; idx++) {
el = myGlobals.device[actualDeviceId].hosts.hash_hostTraffic[idx];
for(; el != NULL; el = el->next) {
if((el->hostNumIpAddress != NULL) && (addrcmp(&el->hostIpAddress,&hostIpAddress) == 0)) {
if((vlanId > 0) && (el->vlanId != vlanId)) continue;
return(el);
}
}
}
}
return(NULL);
}
/* ************************************ */
char* serial2str(HostSerial theSerial, char *buf, int buf_len) {
buf[0] = '\0';
if(buf_len >= 2*sizeof(HostSerial)) {
int i;
char tmpStr[16];
char *ptr = (char*)&theSerial;
for(i=0; i<sizeof(HostSerial); i++) {
snprintf(tmpStr, sizeof(tmpStr), "%02X", ptr[i] & 0xFF);
strcat(buf, tmpStr);
}
}
return(buf);
}
/* ************************************ */
void str2serial(HostSerial *theSerial, char *buf, int buf_len) {
if(buf_len >= 2*sizeof(HostSerial)) {
int i, j;
char tmpStr[16];
u_char *ptr = (u_char*)theSerial;
for(i=0, j=0; j<sizeof(HostSerial); j++) {
u_int c;
tmpStr[0] = buf[i++];
tmpStr[1] = buf[i++];
tmpStr[2] = '\0';
sscanf(tmpStr, "%02X", &c);
ptr[j] = c & 0xFF;
/*
ptr[j] = ((u_int8_t)buf[i]) * 16 + ((u_int8_t)buf[i+1]);
i += 2;
*/
}
}
}
/* ************************************ */
HostTraffic* findHostBySerial(HostSerialIndex serialHostIndex, u_int actualDeviceId) {
HostSerial theSerial;
if(emptySerial(&serialHostIndex)) return(NULL);
getHostSerialFromId(serialHostIndex, &theSerial);
if(theSerial.serialType == SERIAL_IPV4 || theSerial.serialType == SERIAL_IPV6) {
return(findHostByNumIP(theSerial.value.ipSerial.ipAddress,
theSerial.value.ipSerial.vlanId,
actualDeviceId));
} else {
/* MAC */
return(findHostByMAC((char*)theSerial.value.ethSerial.ethAddress,
theSerial.value.ethSerial.vlanId,
actualDeviceId));
}
}
/* ************************************ */
HostTraffic* findHostByMAC(char* macAddr, short vlanId, u_int actualDeviceId) {
HostTraffic *el;
u_int idx = hashHost(NULL, (u_char*)macAddr, &el, actualDeviceId);
if(el != NULL)
return(el); /* Found */
else if(idx == FLAG_NO_PEER)
return(NULL);
else
el = myGlobals.device[actualDeviceId].hosts.hash_hostTraffic[idx];
for(; el != NULL; el = el->next) {
if(!memcmp((char*)el->ethAddress, macAddr, LEN_ETHERNET_ADDRESS)) {
if((vlanId > 0) && (el->vlanId != vlanId))
continue;
else
return(el);
}
}
return(NULL);
}
/* *****************************************************/
unsigned long in6_hash(struct in6_addr *addr) {
return
(addr->s6_addr[13] ) | (addr->s6_addr[15] << 8) |
(addr->s6_addr[14] << 16) | (addr->s6_addr[11] << 24);
}
/* *************************************** */
unsigned short computeIdx(HostAddr *srcAddr, HostAddr *dstAddr, int sport, int dport) {
unsigned short idx = 0;
if (srcAddr->hostFamily != dstAddr->hostFamily)
return -1;
switch (srcAddr->hostFamily) {
case AF_INET:
/*
* The hash key has to be calculated in a specular
* way: its value has to be the same regardless
* of the flow direction.
*
* Patch on the line below courtesy of
* Paul Chapman <[email protected]>
*/
idx = (u_int)(dstAddr->Ip4Address.s_addr+srcAddr->Ip4Address.s_addr+sport+dport);
break;
case AF_INET6:
idx = (u_int)(dstAddr->Ip6Address.s6_addr[0] +
dstAddr->Ip6Address.s6_addr[0] +
srcAddr->Ip6Address.s6_addr[0] +
srcAddr->Ip6Address.s6_addr[0] + sport +! dport);
break;
}
return idx;
}
/* ******************************************** */
u_int16_t computeTransId(HostAddr *srcAddr, HostAddr *dstAddr, int sport, int dport) {
u_int16_t transactionId = 0;
if (srcAddr->hostFamily != dstAddr->hostFamily)
return -1;
switch (srcAddr->hostFamily) {
case AF_INET:
transactionId = (u_int16_t)(3*srcAddr->Ip4Address.s_addr+
dstAddr->Ip4Address.s_addr+5*dport+7*sport);
break;
case AF_INET6:
transactionId = (u_int16_t)(3*srcAddr->Ip6Address.s6_addr[0]+
dstAddr->Ip6Address.s6_addr[0]+5*dport+7*sport);
break;
}
return transactionId;
}
/* ***************************** */
int in6_isglobal(struct in6_addr *addr) {
return (addr->s6_addr[0] & 0xe0) == 0x20;
}
/* ***************************** */
short addrcmp(HostAddr *addr1, HostAddr *addr2) {
if(addr1 == NULL)
if(addr2 == NULL)
return 0;
else
return 1;
else if(addr2 == NULL)
return -1;
if(addr1->hostFamily == 0)
if(addr2->hostFamily == 0)
return 0;
else
return 1;
else if(addr2->hostFamily == 0)
return -1;
if(addr1->hostFamily != addr2->hostFamily) {
if(addr1->hostFamily > addr2->hostFamily)
return 1;
else
return -1;
}
switch (addr1->hostFamily) {
case AF_INET:
if (addr1->Ip4Address.s_addr > addr2->Ip4Address.s_addr)
return (1);
else if (addr1->Ip4Address.s_addr < addr2->Ip4Address.s_addr)
return (-1);
else
return (0);
/*return (addr1->Ip4Address.s_addr != addr2->Ip4Address.s_addr);*/
case AF_INET6:
if(memcmp(&addr1->Ip6Address,&addr2->Ip6Address,sizeof(struct in6_addr)) > 0)
return (1);
else if (memcmp(&addr1->Ip6Address,&addr2->Ip6Address,sizeof(struct in6_addr)) <0)
return (-1);
else
return (0);
break;
default:
return 1;
}
}
/* ****************************************** */
HostAddr *addrcpy(HostAddr *dst, HostAddr *src) {
dst->hostFamily = src->hostFamily;
switch (src->hostFamily) {
case AF_INET:
memcpy(&dst->Ip4Address, &src->Ip4Address, sizeof(struct in_addr));
return(dst);
case AF_INET6:
memcpy(&dst->Ip6Address, &src->Ip6Address, sizeof(struct in6_addr));
return(dst);
default:
return NULL;
}
}
/* ****************************************** */
int addrinit(HostAddr *addr) {
addr->hostFamily = AF_INET;
addr->Ip4Address.s_addr = 0;
return(0);
}
/* ****************************************** */
unsigned short addrget(HostAddr *Haddr,void *addr, int *family , int *size) {
struct in_addr v4addr;
*family = Haddr->hostFamily;
switch(Haddr->hostFamily) {
case AF_INET:
v4addr.s_addr = ntohl(Haddr->Ip4Address.s_addr);
memcpy((struct in_addr *)addr,&v4addr,sizeof(struct in_addr));
*size = sizeof(struct in_addr);
break;
case AF_INET6:
memcpy((struct in6_addr *)addr,&Haddr->Ip6Address, sizeof(struct in6_addr));
*size = sizeof(struct in6_addr);
break;
}
return 1;
}
/* ****************************************** */
unsigned short addrput(int family, HostAddr *dst, void *src) {
if (dst == NULL)
return -1;
dst->hostFamily = family;
switch (family) {
case AF_INET:
memcpy(&dst->Ip4Address, (struct in_addr *)src,sizeof(struct in_addr));
break;
case AF_INET6:
memcpy(&dst->Ip6Address, (struct in6_addr *)src, sizeof(struct in6_addr));
break;
}
return(1);
}
/* ****************************************** */
unsigned short addrnull(HostAddr *addr) {
switch(addr->hostFamily) {
case AF_INET:
return (addr->Ip4Address.s_addr == 0x0);
case AF_INET6:
return (addr->Ip6Address.s6_addr[0] == 0x0);
default:
return(1);
}
}
/* ****************************************** */
unsigned short addrfull(HostAddr *addr) {
switch(addr->hostFamily) {
case AF_INET:
return (addr->Ip4Address.s_addr == 0xffffffff);
case AF_INET6:
return(0);
default:
return 0;
}
}
/* ****************************************** */
unsigned short prefixlookup(struct in6_addr *addr, NtopIfaceAddr *addrs, int size) {
int found = 0;
NtopIfaceAddr *it;
for (it = addrs ; it != NULL; it = it->next) {
if (size == 0)
size = it->af.inet6.prefixlen / 8;
#if DEBUG
{
char buf[47], buf1[47];
traceEvent(CONST_TRACE_INFO, "DEBUG: comparing [%s/%s]: %d",
_intop(addr, buf, INET6_ADDRSTRLEN),
_intop(&it->af.inet6.ifAddr, buf1, INET6_ADDRSTRLEN), found);
}
#endif
if (memcmp(&it->af.inet6.ifAddr,addr,size) == 0) {
found = 1;
break;
}
}
return found;
}
/* ****************************************** */
unsigned short addrlookup(struct in6_addr *addr, NtopIfaceAddr *addrs) {
return (prefixlookup(addr,addrs, sizeof(struct in6_addr)));
}
/* ****************************************** */
NtopIfaceAddr *getLocalHostAddressv6(NtopIfaceAddr *addrs, char* device) {
#if 0
struct iface_handler *ih;
struct iface_if *ii;
struct iface_addr *ia;
NtopIfaceAddr *tmp = NULL;
int count, addr_pos;
if(!(ih = iface_new()))
return NULL;
for(ii = iface_getif_first(ih) ; ii ; ii = iface_getif_next(ii))
if(!strcmp(ii->name,device))
if(iface_if_getinfo(ii) & IFACE_INFO_UP) {
/* Allocate memory for IPv6 addresses */
count = iface_if_addrcount(ii, AF_INET6);
if(count == 0) break;
addrs = (NtopIfaceAddr *)calloc(count, sizeof(NtopIfaceAddr));
addr_pos = 0;
for(ia = iface_getaddr_first(ii, AF_INET6) ; ia ;
ia = iface_getaddr_next(ia, AF_INET6)) {
struct iface_addr_inet6 i6;
iface_addr_getinfo(ia, &i6);
if(in6_isglobal(&i6.addr)&& (addr_pos < count)) {
tmp = &addrs[addr_pos];
tmp->family = AF_INET6;
memcpy(&tmp->af.inet6.ifAddr, &i6.addr,sizeof(struct in6_addr));
tmp->af.inet6.prefixlen = ia->af.inet6.prefixlen;
tmp->next = &addrs[addr_pos+1];
addr_pos++;
}
}
}
if(tmp != NULL) tmp->next = NULL;
iface_destroy(ih);
return(addrs);
#else
return(NULL);
#endif
}
/*******************************************/
/*
* Copy arg vector into a new buffer, concatenating arguments with spaces.
*/
char* copy_argv(register char **argv) {
register char **p;
register u_int len = 0;
char *buf;
char *src, *dst;
p = argv;
if(*p == 0)
return 0;
while (*p)
len += (int)(strlen(*p++) + 1);
buf = (char*)malloc(len);
if(buf == NULL) {
traceEvent(CONST_TRACE_FATALERROR, "Insufficient memory for copy_argv");
exit(20); /* Just in case */
}
p = argv;
dst = buf;
while ((src = *p++) != NULL) {
while ((*dst++ = *src++) != '\0')
;
dst[-1] = ' ';
}
dst[-1] = '\0';
return buf;
}
/**************************************/
unsigned short isLinkLocalAddress(struct in6_addr *addr,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
int i;
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
if(addr == NULL)
return 1;
else if(addr->s6_addr == 0x0)
return 0; /* IP-less myGlobals.device (is it trying to boot via DHCP/BOOTP ?) */
else {
for(i=0; i<myGlobals.numDevices; i++)
if(IN6_IS_ADDR_LINKLOCAL(addr)) {
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: %s is a linklocal address", intop(addr));
#endif
return 1;
}
return 0;
}
}
/*******************************************/
unsigned short in6_isMulticastAddress(struct in6_addr *addr,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
if(IN6_IS_ADDR_MULTICAST(addr)) {
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: %s is multicast [%X/%X]",
intop(addr));
#endif
return 1;
} else
return 0;
}
/*******************************************/
#ifdef INET6
unsigned short in6_isLocalAddress(struct in6_addr *addr, u_int deviceId,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
if(deviceId >= myGlobals.numDevices) {
traceEvent(CONST_TRACE_WARNING, "Index %u out of range [0..%u] - address treated as remote",
deviceId, myGlobals.numDevices);
return(0);
}
if(addrlookup(addr,myGlobals.device[deviceId].v6Addrs) == 1) {
#ifdef ADDRESS_DEBUG
traceEvent(CONST_TRACE_INFO, "ADDRESS_DEBUG: %s is local", intop(addr));
#endif
return 1;
}
if(myGlobals.runningPref.trackOnlyLocalHosts)
return(0);
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: %s is %s", intop(addr));
#endif
/* Link Local Addresses are local */
return(isLinkLocalAddress(addr, the_local_network, the_local_network_mask));
}
#endif
/* ******************************************* */
unsigned short in6_isPrivateAddress(struct in6_addr *addr,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
/* IPv6 have private addresses ?*/
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
return(0);
}
/* ********************************* */
unsigned short in_isBroadcastAddress(struct in_addr *addr,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
int i;
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
if(addr == NULL)
return 1;
else if(addr->s_addr == 0x0)
return 0; /* IP-less myGlobals.device (is it trying to boot via DHCP/BOOTP ?) */
else {
for(i=0; i<myGlobals.numDevices; i++) {
if(!myGlobals.device[i].virtualDevice) {
if(myGlobals.device[i].netmask.s_addr == 0xFFFFFFFF) /* PPP */
return 0;
if((addr->s_addr | myGlobals.device[i].netmask.s_addr) == addr->s_addr) {
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: %s is a broadcast address", intoa(*addr));
#endif
return 1;
}
if((addr->s_addr & ~myGlobals.device[i].netmask.s_addr) == ~myGlobals.device[i].netmask.s_addr) {
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: %s is a network address", intoa(*addr));
#endif
return 1;
}
}
}
return(in_isPseudoBroadcastAddress(addr, the_local_network, the_local_network_mask));
}
}
/* ********************************* */
unsigned short in_isMulticastAddress(struct in_addr *addr,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
if((addr->s_addr & CONST_MULTICAST_MASK) == CONST_MULTICAST_MASK) {
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: %s is multicast [%X/%X]",
intoa(*addr),
((unsigned long)(addr->s_addr) & CONST_MULTICAST_MASK),
CONST_MULTICAST_MASK
);
#endif
return 1;
} else
return 0;
}
/* ********************************* */
u_int8_t num_network_bits(u_int32_t addr) {
u_int8_t i, j, bits = 0, fields[4];
memcpy(fields, &addr, 4);
for(i = 8; i <= 8; i--)
for(j=0; j<4; j++)
if ((fields[j] & (1 << i)) != 0) bits++;
return(bits);
}
/* ********************************* */
unsigned short in_isLocalAddress(struct in_addr *addr, u_int deviceId,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
if(deviceId >= myGlobals.numDevices) {
traceEvent(CONST_TRACE_WARNING, "Index %u out of range [0..%u] - address treated as remote",
deviceId, myGlobals.numDevices);
return(0);
}
#ifdef ADDRESS_DEBUG
traceEvent(CONST_TRACE_INFO, "Address: %s", intoa(*addr));
traceEvent(CONST_TRACE_INFO, "Network: %s", intoa(myGlobals.device[deviceId].network));
traceEvent(CONST_TRACE_INFO, "NetMask: %s", intoa(myGlobals.device[deviceId].netmask));
#endif
if(addr == NULL) return(0);
if(!myGlobals.runningPref.mergeInterfaces) {
if((addr->s_addr & myGlobals.device[deviceId].netmask.s_addr) == myGlobals.device[deviceId].network.s_addr) {
#ifdef ADDRESS_DEBUG
traceEvent(CONST_TRACE_INFO, "ADDRESS_DEBUG: %s is local", intoa(*addr));
#endif
if(the_local_network && the_local_network_mask)
(*the_local_network) = myGlobals.device[deviceId].network.s_addr,
(*the_local_network_mask) = num_network_bits(myGlobals.device[deviceId].netmask.s_addr);
return 1;
}
} else {
int i;
for(i=0; i<myGlobals.numDevices; i++)
if((addr->s_addr & myGlobals.device[i].netmask.s_addr) == myGlobals.device[i].network.s_addr) {
#ifdef ADDRESS_DEBUG
traceEvent(CONST_TRACE_INFO, "ADDRESS_DEBUG: %s is local", intoa(*addr));
#endif
if(the_local_network && the_local_network_mask)
(*the_local_network) = myGlobals.device[i].network.s_addr,
(*the_local_network_mask) = num_network_bits(myGlobals.device[deviceId].netmask.s_addr);
return 1;
}
}
if(myGlobals.runningPref.trackOnlyLocalHosts)
return(0);
/* Broadcast is considered a local address */
return(in_isBroadcastAddress(addr, the_local_network, the_local_network_mask));
}
/* ********************************* */
unsigned short in_isPrivateAddress(struct in_addr *addr,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
/* See http://www.isi.edu/in-notes/rfc1918.txt */
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
/* Fixes below courtesy of Wies-Software <[email protected]> */
if( ((addr->s_addr & 0xFF000000) == 0x0A000000) /* 10.0.0.0/8 */
|| ((addr->s_addr & 0xFFF00000) == 0xAC100000) /* 172.16/12 */
|| ((addr->s_addr & 0xFFFF0000) == 0xC0A80000) /* 192.168/16 */
|| ((addr->s_addr & 0xFF000000) == 0x7F000000) /* 127.0.0.0/8 */
)
return(1);
else
return(0);
}
/***************************************/
unsigned short isBroadcastAddress(HostAddr *addr,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
switch(addr->hostFamily) {
case AF_INET:
return (in_isBroadcastAddress(&addr->Ip4Address, the_local_network, the_local_network_mask));
case AF_INET6:
return (isLinkLocalAddress(&addr->Ip6Address, NULL, NULL));
default: return(0);
}
}
/* ******************************************** */
unsigned short isMulticastAddress(HostAddr *addr,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
switch(addr->hostFamily) {
case AF_INET:
return (in_isMulticastAddress(&addr->Ip4Address, the_local_network, the_local_network_mask));
case AF_INET6:
return (in6_isMulticastAddress(&addr->Ip6Address, NULL, NULL));
default: return(0);
}
}
/* ************************************************* */
unsigned short isLocalAddress(HostAddr *addr, u_int deviceId,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
switch(addr->hostFamily) {
case AF_INET:
return (in_isLocalAddress(&addr->Ip4Address, deviceId, the_local_network, the_local_network_mask));
#ifdef INET6
case AF_INET6:
return (in6_isLocalAddress(&addr->Ip6Address, deviceId, NULL, NULL));
#endif
default: return(0);
}
}
/* ************************************************** */
unsigned short isPrivateAddress(HostAddr *addr,
u_int32_t *the_local_network,
u_int32_t *the_local_network_mask) {
if(the_local_network && the_local_network_mask)
(*the_local_network) = 0, (*the_local_network_mask) = 0;
switch(addr->hostFamily) {
case AF_INET:
return (in_isPrivateAddress(&addr->Ip4Address, the_local_network, the_local_network_mask));
case AF_INET6:
return (in6_isPrivateAddress(&addr->Ip6Address, NULL, NULL));
default: return(0);
}
}
/* ************************************************ */
int dotted2bits(char *mask) {
int fields[4], fields_num;
fields_num = sscanf(mask, "%d.%d.%d.%d",
&fields[0], &fields[1], &fields[2], &fields[3]);
if(fields_num != 4) {
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: dotted2bits (%s) = %d", mask, fields[0]);
#endif
return(atoi(mask));
} else
return(num_network_bits(((fields[0] & 0xff) << 24)
+ ((fields[1] & 0xff) << 16)
+ ((fields[2] & 0xff) << 8)
+ (fields[3] & 0xff)));
}
/* ********************************* */
/* Example: "131.114.0.0/16,193.43.104.0/255.255.255.0" */
void handleAddressLists(char* addresses, NetworkStats theNetworks[MAX_NUM_NETWORKS],
u_short *numNetworks, char *localAddresses,
int localAddressesLen, int flagWhat) {
char *strtokState, *address;
int laBufferPosition = 0, laBufferUsed = 0, i;
if((addresses == NULL) || (addresses[0] == '\0'))
return;
if(0) traceEvent(CONST_TRACE_NOISY,
"Processing %s parameter '%s'",
flagWhat == CONST_HANDLEADDRESSLISTS_MAIN ? "-m | --local-subnets" :
flagWhat == CONST_HANDLEADDRESSLISTS_RRD ? "RRD" :
flagWhat == CONST_HANDLEADDRESSLISTS_NETFLOW ? "Netflow white/black list" :
flagWhat == CONST_HANDLEADDRESSLISTS_COMMUNITIES ? "community" : "unknown",
addresses);
memset(localAddresses, 0, localAddressesLen);
address = strtok_r(addresses, ",", &strtokState);
while(address != NULL) {
u_int32_t network, networkMask, broadcast;
int bits, a, b, c, d;
char *mask = strchr(address, '/');
char *equal = strchr(address, '=');
if(equal != NULL) {
char key[64];
equal[0] = '\0';
safe_snprintf(__FILE__, __LINE__, key, sizeof(key), "subnet.name.%s", address);
storePrefsValue(key, &equal[1]);
}
if(mask == NULL) {
bits = 32;
} else {
mask[0] = '\0';
mask++;
bits = dotted2bits(mask);
}
if(sscanf(address, "%d.%d.%d.%d", &a, &b, &c, &d) != 4) {
traceEvent(CONST_TRACE_WARNING, "Bad format '%s' - ignoring entry",
address);
address = strtok_r(NULL, ",", &strtokState);
continue;
}
if(bits == CONST_INVALIDNETMASK) {
/* malformed netmask specification */
traceEvent(CONST_TRACE_WARNING, "Net mask '%s' not valid - ignoring entry",
mask);
address = strtok_r(NULL, ",", &strtokState);
continue;
}
network = ((a & 0xff) << 24) + ((b & 0xff) << 16) + ((c & 0xff) << 8) + (d & 0xff);
/* Special case the /32 mask - yeah, we could probably do it with some fancy
u long long stuff, but this is simpler...
Burton Strauss <[email protected]> Jun2002
*/
if (bits == 32) {
networkMask = 0xffffffff;
} else {
networkMask = 0xffffffff >> bits;
networkMask = ~networkMask;
}
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: Nw=%08X - Mask: %08X [%08X]",
network, networkMask, (network & networkMask));
#endif
if((networkMask >= 0xFFFFFF00) /* Courtesy of Roy-Magne Mo <[email protected]> */
&& ((network & networkMask) != network)) {
/* malformed network specification */
traceEvent(CONST_TRACE_WARNING, "%d.%d.%d.%d/%d is not a valid network - correcting mask",