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ConnectionHandler.cpp
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ConnectionHandler.cpp
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// Released under the GPL v2, with the OpenSSL exception described in the README file.
// INCLUDES
#ifdef HAVE_CONFIG_H
#include "e2config.h"
#endif
//#include "NaughtyFilter.hpp"
//#include "StoryBoard.hpp"
#include "ConnectionHandler.hpp"
#include "DataBuffer.hpp"
#include "UDSocket.hpp"
//#include "Auth.hpp"
#include "FDTunnel.hpp"
#include "BackedStore.hpp"
#include "Queue.hpp"
#include "ImageContainer.hpp"
#include "Logger.hpp"
#include <signal.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include "CertificateAuthority.hpp"
#include <cerrno>
#include <cstdio>
#include <ctime>
#include <algorithm>
#include <netdb.h>
#include <cstdlib>
#include <unistd.h>
#include <sys/time.h>
#include <strings.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <istream>
#include <sstream>
#include <memory>
#ifdef ENABLE_ORIG_IP
#include <linux/types.h>
#include <linux/netfilter_ipv4.h>
#endif
#include "openssl/ssl.h"
#include "openssl/x509v3.h"
#include "String.hpp"
// GLOBALS
extern OptionContainer o;
extern std::atomic<bool> ttg;
// IMPLEMENTATION
ConnectionHandler::ConnectionHandler()
: clienthost(NULL) {
// initialise SBauth structure
SBauth.filter_group = 0;
SBauth.is_authed = false;
SBauth.user_name = "";
}
// Custom exception class for POST filtering errors
class postfilter_exception : public std::runtime_error {
public:
postfilter_exception(const char *const &msg)
: std::runtime_error(msg) {};
};
//
// URL cache funcs
//
// check the URL cache to see if we've already flagged an address as clean
bool wasClean(HTTPHeader &header, String &url, const int fg) {
return false; // this function needs rewriting always return false
}
// add a known clean URL to the cache
void addToClean(String &url, const int fg) {
return; // this function needs rewriting
}
//
// ConnectionHandler class
//
void ConnectionHandler::peerDiag(const char *message, Socket &peersock) {
if (o.conn.logconerror) {
//int peerport = peersock.getPeerSourcePort();
std::string peer_ip = peersock.getPeerIP();
int err = peersock.getErrno();
if (peersock.isTimedout()) {
E2LOGGER_info(message, " Client at ", peer_ip, " Connection timedout - errno: ", err);
} else if (peersock.isHup()) {
E2LOGGER_info(message, " Client at ", peer_ip, " has disconnected - errno: ", err);
} else if (peersock.sockError()) {
E2LOGGER_info(message, " Client at ", peer_ip, " Connection socket error - errno: ", err);
} else if (peersock.isNoRead()) {
E2LOGGER_info(message, " cant read Client Connection at ", peer_ip, " - errno: ", err);
} else if (peersock.isNoWrite()) {
E2LOGGER_info(message, " cant write Client Connection at ", peer_ip, " - errno: ", err);
} else if (peersock.isNoOpp()) {
E2LOGGER_info(message, " Client Connection is no-op - errno: ", err);
} else {
E2LOGGER_info(message, " Client Connection at ", peer_ip, " problem - errno: ", err);
}
}
}
void ConnectionHandler::upstreamDiag(const char *message, Socket &proxysock) {
if (o.conn.logconerror) {
int err = proxysock.getErrno();
if (proxysock.isTimedout()) {
E2LOGGER_info(message, " upstream timedout - errno: ", err);
} else if (proxysock.isHup()) {
E2LOGGER_info(message, " upstream has disconnected - errno: ", err);
} else if (proxysock.sockError()) {
E2LOGGER_info(message, " upstream socket error - errno: ", err);
} else if (proxysock.isNoRead()) {
E2LOGGER_info(message, " cant read upstream Connection - errno: ", err);
} else if (proxysock.isNoWrite()) {
E2LOGGER_info(message, " cant write upstream Connection - errno: ", err);
} else if (proxysock.isNoOpp()) {
E2LOGGER_info(message, " upstream Connection is no-op - errno: ", err);
} else {
E2LOGGER_info(message, " upstream Connection problem - errno: ", err);
}
}
if (proxysock.isNoOpp())
proxysock.close();
}
// perform URL encoding on a string
std::string ConnectionHandler::miniURLEncode(const char *s) {
std::string encoded;
char *buf = new char[3];
unsigned char c;
for (int i = 0; i < (signed) strlen(s); i++) {
c = s[i];
// allowed characters in a url that have non special meaning
if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9')) {
encoded += c;
continue;
}
// all other characters get encoded
sprintf(buf, "%02x", c);
encoded += "%";
encoded += buf;
}
delete[] buf;
return encoded;
}
// create a temporary bypass URL for the banned page
String ConnectionHandler::hashedURL(String *url, int filtergroup, std::string *clientip,
bool infectionbypass, std::string *user) {
// filter/virus bypass hashes last for a certain time only
String timecode(time(NULL) + (infectionbypass ? (*ldl->fg[filtergroup]).infection_bypass_mode
: (*ldl->fg[filtergroup]).bypass_mode));
// use the standard key in normal bypass mode, and the infection key in infection bypass mode
String magic(infectionbypass ? ldl->fg[filtergroup]->imagic.c_str() : ldl->fg[filtergroup]->magic.c_str());
magic += clientip->c_str();
if(ldl->fg[filtergroup]->bypass_v2)
magic += user->c_str();
magic += timecode;
String res(infectionbypass ? "GIBYPASS=" : "GBYPASS=");
if (!url->after("://").contains("/")) {
String newurl((*url));
newurl += "/";
res += newurl.md5(magic.toCharArray());
} else {
res += url->md5(magic.toCharArray());
}
res += timecode;
DEBUG_debug(" -generate Bypass hashedurl data ", clientip, " ", *url, " ", clientuser, " ", timecode, " result ", res);
return res;
}
// create temporary bypass cookie
String ConnectionHandler::hashedCookie(String *url, const char *magic, std::string *clientip, int bypasstimestamp) {
String timecode(bypasstimestamp);
String data(magic);
data += clientip->c_str();
data += clientuser;
data += timecode;
DEBUG_debug(" -generate Bypass hashedCookie data ", clientip, " ", *url, " ", clientuser, " ", timecode);
String res(url->md5(data.toCharArray()));
res += timecode;
DEBUG_debug(" -Bypass hashedCookie="+ res);
return res;
}
// is this a temporary filter bypass URL?
int ConnectionHandler::isBypassURL(String url, const char *magic, const char *clientip, std::string btype, std::string &user)
{
//if ((url).length() <= 45)
// return 0; // Too short, can't be a bypass
// check to see if this is a bypass URL of the btype type
if(!(url).contains(btype.c_str()))
return 0;
DEBUG_debug("URL ", btype, " found checking...");
String url_left((url).before(btype.c_str()));
url_left.chop(); // remove the ? or &
String url_right((url).after(btype.c_str()));
String url_hash(url_right.subString(0, 32));
String url_time(url_right.after(url_hash.toCharArray()));
DEBUG_debug("URL: ", url_left, ", HASH: ", url_hash, ", TIME: ", url_time);
String mymagic(magic);
mymagic += clientip;
if(ldl->fg[filtergroup]->bypass_v2)
mymagic += user;
mymagic += url_time;
String hashed(url_left.md5(mymagic.toCharArray()));
if(ldl->fg[filtergroup]->cgi_bypass_v2) {
mymagic = hashed;
hashed = mymagic.md5(ldl->fg[filtergroup]->cgi_magic.c_str());
}
if (hashed != url_hash) {
DEBUG_debug("URL ", btype, " hash mismatch");
return 0;
}
time_t timen = time(NULL);
time_t timeu = url_time.toLong();
if (timeu < 1) {
DEBUG_debug("URL ", btype, " bad time value");
return 1; // bad time value
}
if (timeu < timen) { // expired key
DEBUG_debug("URL ", btype, " expired");
return 1; // denotes expired but there
}
DEBUG_debug("URL ", btype, " not expired");
return (int)timeu;
}
// is this a scan bypass URL? i.e. a "magic" URL for retrieving a previously scanned file
bool ConnectionHandler::isScanBypassURL(String url, const char *magic, const char *clientip)
{
// if ((url).length() <= 45)
// return false; // Too short, can't be a bypass
if (!(url).contains("GSBYPASS=")) { // If this is not a bypass url
return false;
}
DEBUG_debug("URL GSBYPASS found checking...");
String url_left((url).before("GSBYPASS="));
url_left.chop(); // remove the ? or &
String url_right((url).after("GSBYPASS="));
String url_hash(url_right.subString(0, 32));
DEBUG_debug("URL: ", url_left, ", HASH: ", url_hash);
// format is:
// GSBYPASS=hash(ip+url+tempfilename+mime+disposition+secret)
// &N=tempfilename&M=mimetype&D=dispos
String tempfilename(url_right.after("&N="));
String tempfilemime(tempfilename.after("&M="));
String tempfiledis(tempfilemime.after("&D="));
tempfilemime = tempfilemime.before("&D=");
tempfilename = tempfilename.before("&M=");
String tohash(clientip + url_left + tempfilename + tempfilemime + tempfiledis + magic);
String hashed(tohash.md5());
if(ldl->fg[filtergroup]->cgi_bypass_v2) {
tohash = hashed;
hashed = tohash.md5(ldl->fg[filtergroup]->cgi_magic.c_str());
}
DEBUG_debug("checking hash: ", clientip, " ", url_left, " ", tempfilename, " ",
tempfilemime, " ", tempfiledis, " ", magic, " ", hashed);
if (hashed == url_hash) {
return true;
}
DEBUG_debug("URL GSBYPASS HASH mismatch");
return false;
}
// send a file to the client - used during bypass of blocked downloads
off_t
ConnectionHandler::sendFile(Socket *peerconn, NaughtyFilter &cm, String &url, bool is_icap, ICAPHeader *icap_head) {
String filedis = cm.tempfiledis;
int fd = open(cm.tempfilename.toCharArray(), O_RDONLY);
if (fd < 0) { // file access error
E2LOGGER_error("Error reading file to send: ", cm.tempfilename);
String fnf(o.language_list.getTranslation(1230));
String head("HTTP/1.1 404 " + fnf + "\r\nContent-Type: text/html\r\n\r\n");
String body("<HTML><HEAD><TITLE>" + fnf + "</TITLE></HEAD><BODY><H1>" + fnf + "</H1></BODY></HTML>\r\n");
if (is_icap) {
icap_head->out_res_header = head;
icap_head->out_res_body = body;
icap_head->out_res_hdr_flag = true;
icap_head->out_res_body_flag = true;
icap_head->respond(*peerconn);
} else {
peerconn->writeString(head.toCharArray());
peerconn->writeString(body.toCharArray());
}
return 0;
}
off_t filesize = lseek(fd, 0, SEEK_END);
lseek(fd, 0, SEEK_SET);
String head("HTTP/1.1 200 OK\r\nContent-Type: " + cm.tempfilemime + "\r\nContent-Length: " + String(filesize));
if (filedis.length() == 0) {
filedis = url.before("?");
while (filedis.contains("/"))
filedis = filedis.after("/");
}
head += "\r\nContent-disposition: attachment; filename=" + filedis;
head += "\r\n\r\n";
if (is_icap) {
icap_head->out_res_header = head;
icap_head->out_res_hdr_flag = true;
icap_head->out_res_body_flag = true;
icap_head->respond(*peerconn);
} else {
if (!peerconn->writeString(head.toCharArray())) {
close(fd);
return 0;
}
}
// perform the actual sending
off_t sent = 0;
int rc;
//char *buffer = new char[250000];
char *buffer = new char[64000];
while (sent < filesize) {
rc = read(fd, buffer, 64000);
DEBUG_debug(" -reading send file rc:", String(rc));
if (rc < 0) {
E2LOGGER_error(" -error reading send file so aborting");
delete[] buffer;
// throw std::exception/();
//cleanThrow("error reading send file", *peerconn);
return 0;
}
if (rc == 0) {
E2LOGGER_error(" -got zero bytes reading send file");
break; // should never happen
}
if (is_icap) {
if (!peerconn->writeChunk(buffer, rc, 100000)) {
delete[] buffer;
peerDiag("Error sending file to client", *peerconn);
return 0;
}
} else {
// as it's cached to disk the buffer must be reasonably big
if (!peerconn->writeToSocket(buffer, rc, 0, 100000)) {
delete[] buffer;
peerDiag("Error sending file to client", *peerconn);
return 0;
// throw std::exception();
}
}
sent += rc;
DEBUG_debug(" -total sent from temp: ", String(sent));
}
if (is_icap) {
String n;
peerconn->writeChunkTrailer(n);
}
delete[] buffer;
close(fd);
return sent;
}
int
ConnectionHandler::connectUpstream(Socket &sock, NaughtyFilter &cm, int port = 0) // connects to to proxy or directly
{
if (port == 0)
port = cm.request_header->port;
String sport(port);
int lerr_mess = 0;
int retry = -1;
bool may_be_loop = false;
for (auto it = o.net.check_ports.begin(); it != o.net.check_ports.end(); it++) {
if (*it == sport) {
may_be_loop = true;
break;
}
}
DEBUG_debug("May_be_loop = ", may_be_loop, " ", " port ", port);
sock.setTimeout(o.net.connect_timeout);
while (++retry < o.net.connect_retries) {
lerr_mess = 0;
if (retry > 0) {
if (o.conn.logconerror)
E2LOGGER_info("retry ", retry, " to connect to ", cm.urldomain);
if (!sock.isTimedout())
usleep(1000); // don't hammer upstream
}
cm.upfailure = false;
if (cm.isdirect) {
String des_ip;
if (cm.isiphost)
des_ip = cm.urldomain;
if(o.conn.use_original_ip_port && cm.got_orig_ip && (cm.connect_site == cm.urldomain))
des_ip = cm.orig_ip;
if(des_ip.length() > 0) {
if (may_be_loop) { // check check_ip list
bool do_break = false;
if (o.net.check_ip.size() > 0) {
for (auto it = o.net.check_ip.begin(); it != o.net.check_ip.end(); it++) {
if (*it == des_ip) {
do_break = true;
lerr_mess = 212;
break;
}
}
}
if (do_break) break;
may_be_loop = false;
}
DEBUG_debug("Connecting to IP ", des_ip, " port ", String(port));
int rc = sock.connect(des_ip, port);
if (rc < 0) {
lerr_mess = 203;
continue;
}
return rc;
} else {
//dns lookup
struct addrinfo hints, *infoptr;
memset(&hints, 0, sizeof(addrinfo));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = 0;
hints.ai_protocol = 0;
hints.ai_canonname = NULL;
hints.ai_addr = NULL;
hints.ai_next = NULL;
int rc = getaddrinfo(cm.connect_site.toCharArray(), NULL, &hints, &infoptr);
if (rc) // problem
{
DEBUG_debug("connectUpstream: getaddrinfo returned ", String(rc),
" for ", cm.connect_site, " ", gai_strerror(rc) );
bool rt = false;
switch (rc) {
case EAI_NONAME:
lerr_mess = 207;
break;
#ifdef EAI_NODATA
case EAI_NODATA:
lerr_mess = 208;
break;
#endif
case EAI_AGAIN:
lerr_mess = 209;
rt = true;
break;
case EAI_FAIL:
lerr_mess = 210;
break;
default:
lerr_mess = 210; //TODO this should have it's own message??
break;
}
sock.close();
if (rt) continue;
else break;
}
char t[256];
struct addrinfo *p;
for (p = infoptr; p != NULL; p = p->ai_next) {
getnameinfo(p->ai_addr, p->ai_addrlen, t, sizeof(t), NULL, 0, NI_NUMERICHOST);
if (may_be_loop) { // check check_ip list
bool do_break = false;
if (o.net.check_ip.size() > 0) {
for (auto it = o.net.check_ip.begin(); it != o.net.check_ip.end(); it++) {
if (*it == t) {
do_break = true;
lerr_mess = 212;
break;
}
}
}
if (do_break) break;
may_be_loop = false;
}
DEBUG_debug("Connecting to IP ", t, " port ", String(port));
int rc = sock.connect(t, port);
if (rc == 0) {
freeaddrinfo(infoptr);
DEBUG_debug("Got connection upfailure is ", String(cm.upfailure) );
return 0;
}
}
freeaddrinfo(infoptr);
if (may_be_loop) break;
lerr_mess = 203;
continue;
}
} else { //is via proxy
sock.setTimeout(o.net.proxy_timeout);
int rc = sock.connect(o.net.proxy_ip, o.net.proxy_port);
if (rc < 0) {
if (sock.isTimedout())
lerr_mess = 201;
else
lerr_mess = 202;
continue;
}
return rc;
}
}
// only get here if failed
cm.upfailure = true;
cm.message_no = lerr_mess;
cm.whatIsNaughty = o.language_list.getTranslation(lerr_mess);
cm.whatIsNaughtyLog = cm.whatIsNaughty;
cm.whatIsNaughtyCategories = "";
cm.whatIsNaughtyDisplayCategories = "";
cm.isItNaughty = true;
cm.blocktype = 3;
cm.isexception = false;
cm.isbypass = false;
return -1;
}
// pass data between proxy and client, filtering as we go.
// this is the only public function of ConnectionHandler
int ConnectionHandler::handlePeer(Socket &peerconn, String &ip, stat_rec *&dystat, unsigned int lc_type) {
persistent_authed = false;
is_real_user = false;
int rc = 0;
Socket proxysock; // also used for direct connection
switch (lc_type) {
case CT_PROXY:
SBauth.is_proxy = true;
rc = handleConnection(peerconn, ip, false, proxysock, dystat);
break;
case CT_THTTPS:
SBauth.is_transparent = true;
rc = handleTHTTPSConnection(peerconn, ip, proxysock, dystat);
break;
case CT_PROXY_TLS:
SBauth.is_proxy = true;
rc = handleProxyTLSConnection(peerconn, ip, proxysock, dystat);
break;
case CT_ICAP:
SBauth.is_icap = true;
rc = handleICAPConnection(peerconn, ip, proxysock, dystat);
break;
}
//if ( ldl->reload_id != load_id)
// rc = -1;
return rc;
}
int ConnectionHandler::handleConnection(Socket &peerconn, String &ip, bool ismitm, Socket &proxysock,
stat_rec *&dystat) {
struct timeval thestart;
gettimeofday(&thestart, NULL);
//peerconn.setTimeout(o.proxy_timeout);
peerconn.setTimeout(o.net.pcon_timeout);
DEBUG_proxy("down_stream thread ",peerconn.down_thread_id);
// ldl = o.currentLists();
HTTPHeader docheader(__HEADER_RESPONSE); // to hold the returned page header from proxy
HTTPHeader header(__HEADER_REQUEST); // to hold the incoming client request headeri(ldl)
// set a timeout as we don't want blocking 4 eva
// this also sets how long a peerconn will wait for other requests
header.setTimeout(o.net.pcon_timeout);
docheader.setTimeout(o.net.exchange_timeout);
//int bypasstimestamp = 0;
// Content scanning plugins to use for request (POST) & response data
std::deque<CSPlugin *> requestscanners;
std::deque<CSPlugin *> responsescanners;
std::string clientip(ip.toCharArray()); // hold the clients ip
header.setClientIP(ip);
if (clienthost) delete clienthost;
clienthost = NULL; // and the hostname, if available
matchedip = false;
// clear list of parameters extracted from URL
urlparams.clear();
// clear out info about POST data
postparts.clear();
// debug stuff surprisingly enough
DEBUG_proxy(" -got peer connection from ", clientip );
try {
//int rc;
#ifdef DEBUG_HIGH
int pcount = 0;
#else
#ifdef DEBUG_LOW
int pcount = 0;
#endif
#endif
// assume all requests over the one persistent connection are from
// the same user. means we only need to query the auth plugin until
// we get credentials, then assume they are valid for all reqs. on
// the persistent connection.
std::string oldclientuser;
std::string room;
//int oldfg = 0;
bool authed = false;
//bool isbanneduser = false;
//bool isscanbypass = false;
//bool isbypass = false;
//bool isvirusbypass = false;
//int bypasstimestamp = 0;
//bool iscookiebypass = false;
AuthPlugin *auth_plugin = NULL;
// RFC states that connections are persistent
bool persistOutgoing = true;
bool persistPeer = true;
bool persistProxy = true;
String last_domain_port;
bool last_isdirect = false;
bool firsttime = true;
if (!header.in(&peerconn, true)) { // get header from client, allowing persistency
if (o.conn.logconerror) {
if (peerconn.getFD() > -1) {
int err = peerconn.getErrno();
//int pport = peerconn.getPeerSourcePort();
std::string peerIP = peerconn.getPeerIP();
E2LOGGER_info("No header recd from client at ", peerIP, " - errno: %d", err);
} else {
E2LOGGER_info("Client connection closed early - no request header received");
}
}
firsttime = false;
persistPeer = false;
} else {
++dystat->reqs;
}
//
// End of set-up section
//
// Start of main loop
//
// maintain a persistent connection
while ((firsttime || persistPeer) && !ttg)
// while ((firsttime || persistPeer) && !reloadconfig)
{
DEBUG_proxy(" firsttime =", firsttime, " ismitm =", ismitm, " clientuser =", clientuser, " group = ", filtergroup);
ldl = o.currentLists();
NaughtyFilter checkme(header, docheader, SBauth);
checkme.listen_port = peerconn.getPort();
DataBuffer docbody;
docbody.setTimeout(o.net.exchange_timeout);
FDTunnel fdt;
if (firsttime) {
// reset flags & objects next time round the loop
firsttime = false;
gettimeofday(&thestart, NULL);
checkme.thestart = thestart;
// quick trick for the very first connection :-)
if (!ismitm)
persistProxy = false;
} else {
// another round...
DEBUG_proxy(" -persisting (count ", ++pcount, ") - ", clientip);
header.reset();
if (!header.in(&peerconn, true)) {
DEBUG_proxy(" -Persistent connection closed");
break;
}
++dystat->reqs;
// we will actually need to do *lots* of resetting of flags etc. here for pconns to work
gettimeofday(&thestart, NULL);
checkme.thestart = thestart;
checkme.bypasstimestamp = 0;
authed = false;
requestscanners.clear();
responsescanners.clear();
matchedip = false;
urlparams.clear();
postparts.clear();
checkme.mimetype = "-";
room = ""; // CHECK THIS - surely room is persistant?????
// reset docheader & docbody
// headers *should* take care of themselves on the next in()
// actually not entirely true for docheader - we may read
// certain properties of it (in denyAccess) before we've
// actually performed the next in(), so make sure we do a full
// reset now.
docheader.reset();
docbody.reset();
peerconn.resetChunk();
proxysock.resetChunk();
}
//
// do this normalisation etc just the once at the start.
checkme.setURL(ismitm);
if(o.log.log_requests) {
//if (e2logger.isEnabled(LoggerSource::requestlog)) {
std::string fnt;
if(ismitm)
fnt = "MITM";
else if(header.isProxyRequest) {
fnt = "PROXY";
} else fnt = "TRANS";
doRQLog(clientuser, clientip, checkme, fnt);
}
if(!header.isProxyRequest) // is transparent http proxy
get_original_ip_port(peerconn,checkme);
//If proxy connection is not persistent..// do this later after checking if direct or via proxy
DEBUG_proxy("Start URL ", checkme.url, "is_ssl=", checkme.is_ssl, "ismitm=", ismitm);
// checks for bad URLs to prevent security holes/domain obfuscation.
if (header.malformedURL(checkme.url)) {
// The requested URL is malformed.
writeback_error(checkme, peerconn, 200, 0, "400 Bad Request");
proxysock.close(); // close connection to proxy
break;
}
// TODO this needs moving is proxy operation is still to be tested
if (checkme.urldomain == o.conn.internal_test_url) {
peerconn.writeString(
"HTTP/1.1 200 \nContent-Type: text/html\n\n<HTML><HEAD><TITLE>e2guardian internal test</TITLE></HEAD><BODY><H1>e2guardian internal test OK</H1> ");
peerconn.writeString("</BODY></HTML>\n");
proxysock.close(); // close connection to proxy
break;
}
// total block list checking now done in pre-auth story
// don't let the client connection persist if the client doesn't want it to.
persistOutgoing = header.isPersistent();
// now check if in input proxy mode and direct upstream if upstream needs closing
if (persistProxy && last_isdirect &&
((last_domain_port != checkme.urldomainport)|| !o.net.no_proxy)) {
proxysock.close();
persistProxy = false;
}
last_domain_port = checkme.urldomainport;
last_isdirect = checkme.isdirect;
//
//
// Now check if machine is banned and room-based checking
//
//
// is this user banned?
//isbanneduser = false;
#ifdef NOTDEF
if(!ismitm) {
// pretend to use xforwarded for
clientip = "192.6.6.6";
ip = clientip;
}
#endif
if (!ismitm && o.use_xforwardedfor) {
bool use_xforwardedfor;
if (o.net.xforwardedfor_filter_ip.size() > 0) {
use_xforwardedfor = false;
for (unsigned int i = 0; i < o.net.xforwardedfor_filter_ip.size(); i++) {
if (strcmp(clientip.c_str(), o.net.xforwardedfor_filter_ip[i].c_str()) == 0) {
use_xforwardedfor = true;
break;
}
}
} else {
use_xforwardedfor = true;
}
if (use_xforwardedfor) {
std::string xforwardip(header.getXForwardedForIP());
if (xforwardip.length() > 6) {
clientip = xforwardip;
ip = clientip;
header.setClientIP(ip);
}
DEBUG_proxy(" -using x-forwardedfor:", clientip);
}
}
checkme.clientip = clientip;
// Look up reverse DNS name of client if needed
if (o.conn.reverse_client_ip_lookups) {
getClientFromIP(clientip.c_str(),checkme.clienthost);
// std::unique_ptr<std::deque<String> > hostnames;
// hostnames.reset(ipToHostname(clientip.c_str()));
// checkme.clienthost = std::string(hostnames->front().toCharArray());
}
//CALL SB pre-authcheck
DEBUG_trace("Run StoryA pre-authcheck");
ldl->StoryA.runFunctEntry(ENT_STORYA_PRE_AUTH, checkme);
DEBUG_proxy("After StoryA pre-authcheck",
" isexception ", String(checkme.isexception),
" isBlocked ", String(checkme.isBlocked),
" message_no ", String(checkme.message_no));
checkme.isItNaughty = checkme.isBlocked;
bool isbannedip = checkme.isBlocked;
bool part_banned;
if (isbannedip) {
// matchedip = clienthost == NULL;
DEBUG_proxy("IP is banned!");
} else {
if (ldl->inRoom(clientip, room, &(checkme.clienthost), &isbannedip, &part_banned, &checkme.isexception,
checkme.urld)) {
DEBUG_proxy(" isbannedip = ", String(isbannedip),
" ispart_banned = ", String(part_banned),
" isexception = ", String(checkme.isexception));
if (isbannedip) {
// matchedip = clienthost == NULL;
checkme.isBlocked = checkme.isItNaughty = true;
}
if (checkme.isexception) {
// do reason codes etc
checkme.whatIsNaughty = o.language_list.getTranslation(630);
checkme.whatIsNaughty.append(room);
checkme.whatIsNaughty.append(o.language_list.getTranslation(631));
checkme.whatIsNaughtyLog = checkme.whatIsNaughty;
checkme.message_no = 632;
}
}
}
//
//
// Start of Authentication Checks
//
//
// don't have credentials for this connection yet? get some!
DEBUG_trace("start Authentication");
overide_persist = false;
if (!persistent_authed) {
bool only_ip_auth;
if (header.isProxyRequest) {
filtergroup = o.filter.default_fg;
SBauth.is_proxy = true;
if(!peerconn.down_thread_id.empty())
SBauth.is_tlsproxy = true;
only_ip_auth = false;
} else {
filtergroup = o.filter.default_trans_fg;
SBauth.is_transparent = true;
only_ip_auth = true;
}
SBauth.group_source = "def";
DEBUG_proxy("isProxyRequest is ", String(header.isProxyRequest),
" only_ip_auth is ", String(only_ip_auth) );
if (!doAuth(checkme.auth_result, authed, filtergroup, auth_plugin, peerconn, proxysock, header, checkme,
only_ip_auth,
checkme.isconnect)) {
if (checkme.auth_result == E2AUTH_407_SENT) {
continue;
}
if ((checkme.auth_result == E2AUTH_REDIRECT) && checkme.isconnect &&
ldl->fg[filtergroup]->ssl_mitm) {
checkme.gomitm = true;
checkme.isdone = true;
} else {
break;
}
}
} else {
DEBUG_proxy(" -Already got credentials for this connection - not querying auth plugins");
authed = true;
}
checkme.filtergroup = filtergroup;
docbody.set_current_config(ldl->fg[filtergroup]);
DEBUG_proxy(" -username: " + clientuser + " -filtergroup: " + String(filtergroup));
//
// End of Authentication Checking
//
//
// Set if candidate for MITM
// (Exceptions will not go MITM)
DEBUG_trace("ismitmcandidate");
checkme.ismitmcandidate = checkme.isconnect && (!checkme.nomitm) && ldl->fg[filtergroup]->ssl_mitm && (header.port == 443);
if (checkme.ismitmcandidate ) {
if(!ldl->fg[filtergroup]->automitm) checkme.automitm = false;
} else {
checkme.nomitm = true;
checkme.automitm = false;
}
if (checkme.urldomain == o.conn.internal_status_url) {
peerconn.writeString(
"HTTP/1.1 200 \nContent-Type: text/html\n\n<HTML><HEAD><TITLE>e2guardian internal status</TITLE></HEAD><BODY><H1>e2guardian internal status OK</H1> ");
String temp = "User: ";
temp += clientuser;
temp += "<br>";
temp += "IP: ";
temp += ip;
temp += "<br>";
temp += "Filtergroup: ";
temp += ldl->fg[filtergroup]->name;
temp += "<br>";
temp += "Flags: ";
temp += checkme.getFlags();
temp += "<br>";
temp += "e2g version: ";
temp += PACKAGE_VERSION;
temp += "<br>";
temp += "Server: ";
temp += o.net.server_name;
temp += "<br>";
peerconn.writeString(temp);
peerconn.writeString("</BODY></HTML>\n");
proxysock.close(); // close connection to proxy
break;
}
//
// Start of by pass
//
DEBUG_trace("checkByPass");
if (!checkme.isdone && checkByPass(checkme, ldl, header, proxysock, peerconn, clientip)
&& sendScanFile(peerconn, checkme)) {
persistProxy = false;
break;
}
//
// End by pass
//