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/*
* WallFire -- a comprehensive firewall administration tool.
*
* Copyright (C) 2001 Herv Eychenne <rv@wallfire.org>
*
* 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.
*
*/
using namespace std;
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sstream>
#include <algorithm>
#include <stdio.h>
#include <stdlib.h>
/* <<< guess */
#include <unistd.h>
#include <sys/param.h> /* for MAXHOSTNAMELEN */
#include <sys/utsname.h> /* for uname */
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <net/if.h>
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#include <sys/ioctl.h>
#include <errno.h>
/* guess >>> */
#include "checks.h"
#include "wfhost.h"
#include "list1.h"
#include "defs.h"
/* Warning: this must match enum order. */
static const char* wf_osnames[] = {
"Unknown", "Linux", "FreeBSD", "NetBSD", "OpenBSD", "Solaris", "SunOS",
"Irix", "HP-UX" };
/* Warning: this must match enum order. */
static const char* wf_lindistrib[] = {
"Unknown", "Debian", "Mandrake", "Redhat"
}; /* supported */
/*
"Unknown", "Debian", "Slackware", "Mandrake", "Redhat", "SuSe", "TurboLinux"
*/
wf_host::wf_host() :
name(),
fqdn(),
comment(),
ipaddr(),
ifaces(),
services(),
os(WF_OS_UNKNOWN),
os_version_major(-1),
os_version_minor(-1),
os_version_micro(-1),
lindistrib(WF_LINDISTRIB_UNKNOWN),
lindistrib_version_major(-1),
lindistrib_version_minor(-1)
{
}
wf_host::~wf_host() {}
// default wf_host::wf_host(const wf_host& host)
bool
wf_host::iface_isdefined(const string& name) const {
list<wf_iface>::const_iterator first = ifaces.begin(), last = ifaces.end();
for (; first != last; ++first)
if (first->name == name)
return true;
return false;
}
bool
wf_host::iface_add(const wf_iface& iface) {
if (iface_isdefined(iface.name))
return false; /* interface with the same name already defined */
ifaces.push_back(iface);
return true;
}
void
wf_host::iface_del(const wf_iface& iface) {
ifaces.remove(iface);
}
void
wf_host::iface_del(const string& name) {
list<wf_iface>::iterator first = ifaces.begin(), last = ifaces.end();
for (; first != last; ++first) {
if (first->name == name) {
ifaces.erase(first);
return; /* we infer there cannot be 2 interfaces with the same name */
}
}
}
bool
wf_host::service_add(const wf_service& service) {
if (find(services.begin(), services.end(), service) != services.end())
return false; /* service already present in the list */
services.push_back(service);
return true;
}
void
wf_host::service_del(const wf_service& service) {
services.remove(service);
}
bool
wf_host::os_version_guess() {
struct utsname utsname;
if (uname(&utsname))
return false;
int major, minor, micro;
if (sscanf(utsname.release, "%i.%i.%i", &major, &minor, µ) != 3) {
if (sscanf(utsname.release, "%i.%i", &major, &minor) != 2)
return false;
}
else
os_version_micro = micro;
os_version_major = major;
os_version_minor = minor;
return true;
}
bool
wf_host::os_guess() {
struct utsname utsname;
if (uname(&utsname))
return false;
/*
cerr <<
"sysname: " << utsname.sysname << endl <<
"release: " << utsname.release << endl <<
"machine: " << utsname.machine << endl;
*/
unsigned int i;
for (i = 1 /* skip "Unknown" */;
i < sizeof(wf_osnames) / sizeof(char*);
i++) {
if (!strcmp(utsname.sysname, wf_osnames[i])) {
os = (enum wf_os)i;
break;
}
}
#if 0 // always return true for the moment ALL@@3
if (i == sizeof(wf_osnames) / sizeof(char*))
return false; /* not found */
#endif
os_version_guess();
return true;
}
string
wf_host::os_tostr() const {
if (os < 0 || (unsigned)os >= (sizeof(wf_osnames) / sizeof(char*)))
return "Invalid";
return wf_osnames[os];
}
string
wf_host::os_version_tostr() const {
if (os == WF_OS_UNKNOWN)
return "";
ostringstream outs;
if (os_version_major != -1) {
outs << os_version_major;
if (os_version_minor != -1) {
outs << '.' << os_version_minor;
if (os_version_micro != -1)
outs << '.' << os_version_micro;
}
}
return outs.str();
}
#ifdef linux
/* We must figure it at runtime because configure time probing would
prevent from shipping generic executables. */
bool
wf_host::linux_distribution_guess() {
FILE* file;
int major, minor;
if ((file = fopen("/etc/debian_version", "r")) != NULL) {
char line[32];
lindistrib = WF_LINDISTRIB_DEBIAN;
if (fgets(line, sizeof(line), file) == NULL)
return false;
if (sscanf(line, "%i.%i", &major, &minor) != 2)
return false;
}
else if ((file = fopen("/etc/mandrake-release", "r")) != NULL) {
lindistrib = WF_LINDISTRIB_MANDRAKE;
if (fscanf(file, "Linux Mandrake release %i.%i", &major, &minor) != 2)
return false;
}
else if ((file = fopen("/etc/redhat-release", "r")) != NULL) {
lindistrib = WF_LINDISTRIB_REDHAT;
if (fscanf(file, "Linux Redhat release %i.%i", &major, &minor) != 2)
return false;
}
else
return false;
lindistrib_version_major = major;
lindistrib_version_minor = minor;
return true;
}
#endif /* linux */
string
wf_host::linux_distribution_tostr() const {
if (os != WF_OS_LINUX ||
lindistrib < 0 ||
(unsigned)lindistrib >= sizeof(wf_lindistrib) / sizeof(char*))
return "Invalid";
return wf_lindistrib[lindistrib];
}
string
wf_host::linux_distribution_version_tostr() const {
ostringstream outs;
if (os != WF_OS_LINUX || lindistrib == WF_LINDISTRIB_UNKNOWN)
return "";
if (lindistrib_version_major != -1) {
outs << lindistrib_version_major;
if (lindistrib_version_minor != -1)
outs << '.' << lindistrib_version_minor;
}
return outs.str();
}
bool
wf_host::name_guess() {
char hostname[MAXHOSTNAMELEN + 1];
if (gethostname(hostname, MAXHOSTNAMELEN) == 0)
name = hostname;
return true;
}
static string
replace_colon(const string& str) {
string res;
string::const_iterator first = str.begin(), last = str.end();
for ( ; first != last; ++first) {
switch (*first) {
case ':':
res += '_';
break;
default:
res += *first;
}
}
return res;
}
/* We consider that no field is already defined, except name. */
bool
wf_host::ifaces_guess(bool skip_useless) {
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
struct ifaddrs *ifap, *ifa;
if (getifaddrs(&ifap) < 0) {
perror("getifaddrs");
return false;
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (iface_isdefined(ifa->ifa_name))
continue;
wf_iface iface;
if (iface.guess(ifa->ifa_name, skip_useless))
iface_add(iface);
}
freeifaddrs(ifap);
#else
int sock;
char iflist[2048];
struct ifconf ifc;
struct ifreq* ifr;
int n;
sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
if (sock < 0) {
perror("socket creation");
return false;
}
/* get interface list */
ifc.ifc_buf = iflist;
ifc.ifc_len = sizeof(iflist);
if (ioctl(sock, SIOCGIFCONF, (char*)&ifc) < 0) {
perror("ioctl IFCONF");
close(sock);
return false;
}
ifr = ifc.ifc_req;
for (n = ifc.ifc_len / sizeof(struct ifreq); --n >= 0; ++ifr) {
wf_iface iface;
if (iface.guess(ifr, sock, skip_useless))
iface_add(iface);
}
close(sock);
#endif
/* complete ifaces' names and comments */
list<wf_iface>::iterator first = ifaces.begin(), last = ifaces.end();
for (; first != last; ++first) {
wf_iface& iface = *first;
wf_network& network = iface.network;
if (network.network.isdefined()) {
struct netent* net;
net = getnetbyaddr(ntohl(network.network.get()), AF_INET);
if (net != NULL)
network.name = net->n_name;
else
network.name = name + "_" + replace_colon(iface.name) + "_net";
}
else
network.name = name + "_" + replace_colon(iface.name) + "_net";
char* str;
{
char tmp[256];
str = _("%s %s network");
snprintf(tmp, sizeof(tmp), str, name.c_str(), iface.name.c_str());
network.comment = tmp;
}
string devname;
if (iface.flags & IFF_LOOPBACK)
devname = "Loopback";
else if (iface.flags & IFF_POINTOPOINT)
devname = "PPP";
else
devname = iface.name;
{
char tmp[256];
str = _("%s interface");
snprintf(tmp, sizeof(tmp), str, devname.c_str());
iface.comment = tmp;
}
}
return true;
}
bool
wf_host::check() const {
if (name.empty()) {
fprintf(stderr, _("Host: no name is defined.\n"));
return false;
}
if (wf_object_name_check(name) == false) {
fprintf(stderr, _("Host `%s': invalid name.\n"), name.c_str());
return false;
}
if (fqdn.empty() == false) {
if (wf_hostname_check(fqdn) == false) {
fprintf(stderr, _("Host `%s': invalid fqdn.\n"), fqdn.c_str());
return false;
}
}
/* check ifaces */
list<wf_iface>::const_iterator first = ifaces.begin(), last = ifaces.end();
for (; first != last; ++first) {
if (first->check() == false) {
fprintf(stderr, _("Host `%s': wrong interface.\n"), name.c_str());
return false;
}
}
// check services?? ALL@@2
return true;
}
/* We consider that no field is already defined. */
bool
wf_host::guess(bool skip_useless) {
name_guess();
if (os_guess() == false || ifaces_guess(skip_useless) == false)
return false;
/* We do not return false if distribution guess fails. */
#ifdef linux
if (os == WF_OS_LINUX)
linux_distribution_guess();
#endif
return true;
}
template<class T>
struct debugprint_class {
debugprint_class(ostream& __os) : os(__os) {}
void operator()(T x) { x.debugprint(os); }
ostream& os;
};
ostream&
wf_host::debugprint(ostream& os) const {
os << _("Host:") << endl;
os << _("comment:\t") << comment << endl;
os << _("name:\t\t") ;
if (name.empty() == false)
os << name;
else
os << _("(undefined)");
os << endl;
os << _("fqdn:\t\t");
if (fqdn.empty() == false)
os << fqdn;
else
os << _("(undefined)");
os << endl;
os << _("address:\t") << ipaddr << endl;
for_each(ifaces.begin(), ifaces.end(), debugprint_class<wf_iface>(os));
os << endl;
for_each(services.begin(), services.end(), debugprint_class<wf_service>(os));
return os;
}
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