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Merge pull request #1392 from G10h4ck/hotfix_udp_crash

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WIP: Attempt to fix crash in pqissludp
This commit is contained in:
csoler 2018-11-06 23:28:54 +01:00 committed by GitHub
commit cfb194a8ef
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7 changed files with 235 additions and 156 deletions
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70
libretroshare/src/pqi/pqissludp.cc
View File

@ -248,54 +248,34 @@ int pqissludp::Initiate_Connection()
}
else if (mConnectFlags & RS_CB_FLAG_MODE_UDP_RELAY)
{
std::cerr << "Calling tou_connect_via_relay(";
std::cerr << sockaddr_storage_tostring(mConnectSrcAddr) << ",";
std::cerr << sockaddr_storage_tostring(mConnectProxyAddr) << ",";
std::cerr << sockaddr_storage_tostring(remote_addr) << ")" << std::endl;
std::cerr << __PRETTY_FUNCTION__ << " Calling tou_connect_via_relay("
<< sockaddr_storage_tostring(mConnectSrcAddr) << ","
<< sockaddr_storage_tostring(mConnectProxyAddr) << ","
<< sockaddr_storage_tostring(remote_addr) << ")" << std::endl;
if(!sockaddr_storage_ipv6_to_ipv4(mConnectSrcAddr))
{
struct sockaddr_in srcaddr;
struct sockaddr_in proxyaddr;
struct sockaddr_in remoteaddr;
if(!sockaddr_storage_ipv6_to_ipv4(mConnectSrcAddr))
{
std::cerr << __PRETTY_FUNCTION__ << "Error: mConnectSrcAddr is "
<< "not valid IPv4!" << std::endl;
sockaddr_storage_dump(mConnectSrcAddr);
print_stacktrace();
return -EINVAL;
}
if(!sockaddr_storage_ipv6_to_ipv4(mConnectProxyAddr))
{
std::cerr << __PRETTY_FUNCTION__ << "Error: mConnectProxyAddr "
<< "is not valid IPv4!" << std::endl;
sockaddr_storage_dump(mConnectProxyAddr);
print_stacktrace();
return -EINVAL;
}
struct sockaddr_in *rap = (struct sockaddr_in *) &remote_addr;
struct sockaddr_in *pap = (struct sockaddr_in *) &mConnectProxyAddr;
struct sockaddr_in *sap = (struct sockaddr_in *) &mConnectSrcAddr;
srcaddr.sin_family = AF_INET;
proxyaddr.sin_family = AF_INET;
remoteaddr.sin_family = AF_INET;
srcaddr.sin_addr = sap->sin_addr;
proxyaddr.sin_addr = pap->sin_addr;
remoteaddr.sin_addr = rap->sin_addr;
srcaddr.sin_port = sap->sin_port;
proxyaddr.sin_port = pap->sin_port;
remoteaddr.sin_port = rap->sin_port;
err = tou_connect_via_relay(sockfd, &srcaddr, &proxyaddr, &remoteaddr);
std::cerr << __PRETTY_FUNCTION__ << " ERROR mConnectSrcAddr is "
<< "not a valid IPv4!" << std::endl;
sockaddr_storage_dump(mConnectSrcAddr);
print_stacktrace();
return -EINVAL;
}
if(!sockaddr_storage_ipv6_to_ipv4(mConnectProxyAddr))
{
std::cerr << __PRETTY_FUNCTION__ << " ERROR mConnectProxyAddr "
<< "is not a valid IPv4!" << std::endl;
sockaddr_storage_dump(mConnectProxyAddr);
print_stacktrace();
return -EINVAL;
}
err = tou_connect_via_relay(
sockfd,
reinterpret_cast<sockaddr_in&>(mConnectSrcAddr),
reinterpret_cast<sockaddr_in&>(mConnectProxyAddr),
reinterpret_cast<sockaddr_in&>(remote_addr) );
/*** It seems that the UDP Layer sees x 1.2 the traffic of the SSL layer.
* We need to compensate somewhere... we drop the maximum traffic to 75% of limit

80
libretroshare/src/tcponudp/bss_tou.c
View File

@ -99,48 +99,55 @@ static int BIO_get_init(BIO *a) { return a->init; }
static int BIO_get_shutdown(BIO *a) { return a->shutdown; }
static void BIO_set_init(BIO *a,int i) { a->init=i; }
static void BIO_set_data(BIO *a,void *p) { a->ptr = p; }
long (*BIO_meth_get_ctrl(const BIO_METHOD* biom)) (BIO*, int, long, void*)
{ return biom->ctrl; }
#endif
#else
static BIO_METHOD methods_tou_sockp =
{
BIO_TYPE_TOU_SOCKET,
"tou_socket",
tou_socket_write,
tou_socket_read,
tou_socket_puts,
NULL, /* tou_gets, */
tou_socket_ctrl,
tou_socket_new,
tou_socket_free,
NULL,
};
typedef struct bio_method_st {
int type;
const char *name;
int (*bwrite) (BIO *, const char *, int);
int (*bread) (BIO *, char *, int);
int (*bputs) (BIO *, const char *);
int (*bgets) (BIO *, char *, int);
long (*ctrl) (BIO *, int, long, void *);
int (*create) (BIO *);
int (*destroy) (BIO *);
long (*callback_ctrl) (BIO *, int, bio_info_cb *);
} BIO_METHOD;
#endif
static BIO_METHOD methods_tou_sockp=
{
BIO_TYPE_TOU_SOCKET,
"tou_socket",
tou_socket_write,
tou_socket_read,
tou_socket_puts,
NULL, /* tou_gets, */
tou_socket_ctrl,
tou_socket_new,
tou_socket_free,
NULL,
};
BIO_METHOD *BIO_s_tou_socket(void)
{
BIO_METHOD* BIO_s_tou_socket(void)
{
#ifdef DEBUG_TOU_BIO
fprintf(stderr, "BIO_s_tou_socket(void)\n");
#endif
return(&methods_tou_sockp);
}
#else
BIO_METHOD* BIO_s_tou_socket(void)
{
static BIO_METHOD* methods_tou_sockp_ptr = NULL;
if(!methods_tou_sockp_ptr)
{
methods_tou_sockp_ptr = BIO_meth_new(BIO_TYPE_TOU_SOCKET, "tou_socket");
BIO_meth_set_write( methods_tou_sockp_ptr, tou_socket_write );
BIO_meth_set_read( methods_tou_sockp_ptr, tou_socket_read );
BIO_meth_set_puts( methods_tou_sockp_ptr, tou_socket_puts );
BIO_meth_set_ctrl( methods_tou_sockp_ptr, tou_socket_ctrl );
BIO_meth_set_create( methods_tou_sockp_ptr, tou_socket_new );
BIO_meth_set_destroy( methods_tou_sockp_ptr, tou_socket_free );
}
return methods_tou_sockp_ptr;
}
#endif
BIO *BIO_new_tou_socket(int fd, int close_flag)
{
BIO *ret;
@ -260,17 +267,16 @@ static long tou_socket_ctrl(BIO *b, int cmd, long num, void *ptr)
break;
case BIO_C_SET_FD:
tou_socket_free(b);
ret = BIO_s_fd()->ctrl(b,cmd,num,ptr) ;
ret = BIO_meth_get_ctrl((BIO_METHOD*)BIO_s_fd())(b,cmd,num,ptr);
break;
case BIO_C_GET_FD:
ret = BIO_s_fd()->ctrl(b,cmd,num,ptr) ;
ret = BIO_meth_get_ctrl((BIO_METHOD*)BIO_s_fd())(b,cmd,num,ptr);
break;
case BIO_CTRL_GET_CLOSE:
ret = BIO_s_fd()->ctrl(b,cmd,num,ptr) ;
ret = BIO_meth_get_ctrl((BIO_METHOD*)BIO_s_fd())(b,cmd,num,ptr);
break;
case BIO_CTRL_SET_CLOSE:
ret = BIO_s_fd()->ctrl(b,cmd,num,ptr) ;
ret = BIO_meth_get_ctrl((BIO_METHOD*)BIO_s_fd())(b,cmd,num,ptr);
break;
case BIO_CTRL_PENDING:
ret = tou_maxread(BIO_get_fd(b,NULL));

102
libretroshare/src/tcponudp/tou.cc
View File

@ -25,15 +25,15 @@ static const int kInitStreamTable = 5;
#include <stdlib.h>
#include <string.h>
#include "util/rstime.h"
#include <vector>
#include <iostream>
#include <errno.h>
#include "util/rstime.h"
#include "udp/udpstack.h"
#include "pqi/pqinetwork.h"
#include "tcpstream.h"
#include <vector>
#include <iostream>
#include <errno.h>
#include "util/stacktrace.h"
#define DEBUG_TOU_INTERFACE 1
#define EUSERS 87
@ -54,7 +54,7 @@ static RsMutex touMutex("touMutex");
// Mutex is used to control addition / removals from tou_streams.
// Lookup should be okay - as long as you stick to your allocated ID!
static std::vector<TcpOnUdp *> tou_streams;
static std::vector<TcpOnUdp *> tou_streams;
static int tou_inited = 0;
@ -171,19 +171,30 @@ int tou_socket(uint32_t recvIdx, uint32_t type, int /*protocol*/)
bool tou_stream_check(int sockfd)
{
if (sockfd < 0)
if(sockfd < 0)
{
std::cerr << "tou_stream_check() ERROR sockfd < 0";
std::cerr << std::endl;
std::cerr << __PRETTY_FUNCTION__ << " ERROR sockfd: " << sockfd
<< " < 0" << std::endl;
print_stacktrace();
return false;
}
if (tou_streams[sockfd] == NULL)
if(sockfd >= tou_streams.size())
{
std::cerr << "tou_stream_check() ERROR tou_streams[sockfd] == NULL";
std::cerr << std::endl;
std::cerr << __PRETTY_FUNCTION__ << " ERROR sockfd: " << sockfd
<< " out of bound!" << std::endl;
print_stacktrace();
return false;
}
if(!tou_streams[sockfd])
{
std::cerr << __PRETTY_FUNCTION__ << " ERROR tou_streams[sockfd] == NULL"
<< std::endl;
print_stacktrace();
return false;
}
return true;
}
@ -370,62 +381,55 @@ int tou_listen(int /* sockfd */ , int /* backlog */ )
*/
#define DEFAULT_RELAY_CONN_PERIOD 1
int tou_connect_via_relay(int sockfd,
const struct sockaddr_in *own_addr,
const struct sockaddr_in *proxy_addr,
const struct sockaddr_in *dest_addr)
int tou_connect_via_relay( int sockfd, const sockaddr_in& own_addr,
const sockaddr_in& proxy_addr,
const sockaddr_in& dest_addr )
{
if (!tou_stream_check(sockfd))
{
return -1;
}
TcpOnUdp *tous = tou_streams[sockfd];
std::cerr << __PRETTY_FUNCTION__ << std::endl;
if (!tou_stream_check(sockfd)) return -EINVAL;
TcpOnUdp& tous = *tou_streams[sockfd];
/* enforce that the udptype is correct */
if (tous -> udptype != TOU_RECEIVER_TYPE_UDPRELAY)
if (tous.udptype != TOU_RECEIVER_TYPE_UDPRELAY)
{
std::cerr << "tou_connect() ERROR connect method invalid for udptype";
std::cerr << std::endl;
tous -> lasterrno = EINVAL;
return -1;
std::cerr << __PRETTY_FUNCTION__ << " ERROR connect method invalid for "
<< "udptype" << std::endl;
tous.lasterrno = EINVAL;
return -EINVAL;
}
#ifdef TOU_DYNAMIC_CAST_CHECK
/* extra checking -> for testing purposes (dynamic cast) */
UdpRelayReceiver *urr = dynamic_cast<UdpRelayReceiver *>(tous->udpsr);
if (!urr)
UdpRelayReceiver* urr_ptr = dynamic_cast<UdpRelayReceiver*>(tous.udpsr);
if(!urr_ptr)
{
std::cerr << "tou_connect() ERROR cannot convert type to UdpRelayReceiver";
std::cerr << std::endl;
tous -> lasterrno = EINVAL;
return -1;
std::cerr << __PRETTY_FUNCTION__ << " ERROR cannot convert to "
<< "UdpRelayReceiver" << std::endl;
tous.lasterrno = EINVAL;
return -EINVAL;
}
#else
UdpRelayReceiver *urr = (UdpRelayReceiver *) (tous->udpsr);
#endif
UdpRelayReceiver& urr = *urr_ptr; urr_ptr = nullptr;
/* create a TCP stream to connect with. */
if (!tous->tcp)
if (!tous.tcp)
{
tous->tcp = new TcpStream(tous->udpsr);
tous.tcp = new TcpStream(tous.udpsr);
UdpRelayAddrSet addrSet(own_addr, dest_addr);
urr->addUdpPeer(tous->tcp, &addrSet, proxy_addr);
UdpRelayAddrSet addrSet(&own_addr, &dest_addr);
urr.addUdpPeer(tous.tcp, &addrSet, &proxy_addr);
}
/* We Point it at the Destination Address.
* The UdpRelayReceiver wraps and re-directs the packets to the proxy
*/
tous->tcp->connect(*dest_addr, DEFAULT_RELAY_CONN_PERIOD);
tous->tcp->tick();
if (tous->tcp->isConnected())
{
return 0;
}
tous.tcp->connect(dest_addr, DEFAULT_RELAY_CONN_PERIOD);
tous.tcp->tick();
if (tous.tcp->isConnected()) return 0;
tous -> lasterrno = EINPROGRESS;
return -1;
tous.lasterrno = EINPROGRESS;
return -EINPROGRESS;
}

14
libretroshare/src/tcponudp/tou.h
View File

@ -103,12 +103,6 @@ int tou_connect(int sockfd, const struct sockaddr *serv_addr,
socklen_t addrlen, uint32_t conn_period);
int tou_accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
/* for relay connections */
int tou_connect_via_relay(int sockfd,
const struct sockaddr_in *own_addr,
const struct sockaddr_in *proxy_addr,
const struct sockaddr_in *dest_addr);
/* non-standard bonuses */
int tou_connected(int sockfd);
int tou_listenfor(int sockfd, const struct sockaddr *serv_addr, socklen_t addrlen);
@ -131,6 +125,14 @@ int tou_maxwrite(int sockfd);
#ifdef __cplusplus
}
typedef struct sockaddr_in sockaddr_in;
/// for relay connections
int tou_connect_via_relay( int sockfd, const sockaddr_in& own_addr,
const sockaddr_in& proxy_addr,
const sockaddr_in& dest_addr );
#endif
#endif

117
libretroshare/src/util/stacktrace.h
View File

@ -1,9 +1,7 @@
/*******************************************************************************
* libretroshare/src/util: smallobject.h *
* libretroshare *
* *
* libretroshare: retroshare core library *
* *
* Copyright (C) 2016 Gioacchino Mazzurco <gio@eigenlab.org> *
* Copyright (C) 2016-2018 Gioacchino Mazzurco <gio@eigenlab.org> *
* Copyright (C) 2008 Timo Bingmann http://idlebox.net/ *
* *
* This program is free software: you can redistribute it and/or modify *
@ -20,24 +18,39 @@
* along with this program. If not, see <https://www.gnu.org/licenses/>. *
* *
*******************************************************************************/
#ifndef _STACKTRACE_H_
#define _STACKTRACE_H_
#pragma once
#include <stdio.h>
#include <cstdio>
#include <csignal>
#include <cstdlib>
#if defined(__linux__) && defined(__GLIBC__)
#include <stdlib.h>
#include <execinfo.h>
#include <cxxabi.h>
/** Print a demangled stack backtrace of the caller function to FILE* out. */
static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames = 63)
/**
* @brief Print a backtrace to FILE* out.
* @param[in] demangle true to demangle C++ symbols requires malloc working, in
* some patological cases like a SIGSEGV received during a malloc this would
* cause deadlock so pass false if you may be in such situation (like in a
* SIGSEGV handler )
* @param[in] out output file
* @param[in] maxFrames maximum number of stack frames you want to bu printed
*/
static inline void print_stacktrace(
bool demangle = true, FILE *out = stderr, unsigned int maxFrames = 63 )
{
if(!out)
{
fprintf(stderr, "print_stacktrace invalid output file!\n");
return;
}
fprintf(out, "stack trace:\n");
// storage array for stack trace address data
void* addrlist[max_frames+1];
void* addrlist[maxFrames+1];
// retrieve current stack addresses
int addrlen = backtrace(addrlist, sizeof(addrlist) / sizeof(void*));
@ -48,6 +61,19 @@ static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames
return;
}
if(!demangle)
{
int outFd = fileno(out);
if(outFd < 0)
{
fprintf(stderr, "print_stacktrace invalid output file descriptor!\n");
return;
}
backtrace_symbols_fd(addrlist, addrlen, outFd);
return;
}
// resolve addresses into strings containing "filename(function+address)",
// this array must be free()-ed
char** symbollist = backtrace_symbols(addrlist, addrlen);
@ -62,8 +88,8 @@ static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames
{
char *begin_name = 0, *begin_offset = 0, *end_offset = 0;
// find parentheses and +address offset surrounding the mangled name:
// ./module(function+0x15c) [0x8048a6d]
/* find parentheses and +address offset surrounding the mangled
* name: ./module(function+0x15c) [0x8048a6d] */
for (char *p = symbollist[i]; *p; ++p)
{
if (*p == '(') begin_name = p;
@ -75,7 +101,8 @@ static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames
}
}
if (begin_name && begin_offset && end_offset && begin_name < begin_offset)
if ( begin_name && begin_offset && end_offset
&& begin_name < begin_offset )
{
*begin_name++ = '\0';
*begin_offset++ = '\0';
@ -86,17 +113,20 @@ static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames
// __cxa_demangle():
int status;
char* ret = abi::__cxa_demangle(begin_name, funcname, &funcnamesize, &status);
char* ret = abi::__cxa_demangle(
begin_name, funcname, &funcnamesize, &status );
if (status == 0)
{
funcname = ret; // use possibly realloc()-ed string
fprintf(out, " %s : %s+%s\n", symbollist[i], funcname, begin_offset);
fprintf( out, " %s : %s+%s\n",
symbollist[i], funcname, begin_offset );
}
else
{
// demangling failed. Output function name as a C function with
// no arguments.
fprintf(out, " %s : %s()+%s\n", symbollist[i], begin_name, begin_offset);
fprintf( out, " %s : %s()+%s\n",
symbollist[i], begin_name, begin_offset );
}
}
else
@ -111,12 +141,61 @@ static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames
}
#else // defined(__linux__) && defined(__GLIBC__)
static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames = 63)
static inline void print_stacktrace(
bool demangle = true, FILE *out = stderr, unsigned int max_frames = 63 )
{
(void) demangle;
(void) max_frames;
fprintf(out, "TODO: 2016/01/01 print_stacktrace not implemented yet for WINDOWS_SYS and ANDROID\n");
}
#endif // defined(__linux__) && defined(__GLIBC__)
#endif // _STACKTRACE_H_
/**
* @brief CrashStackTrace catch crash signals and print stack trace
* Inspired too https://oroboro.com/stack-trace-on-crash/
*/
struct CrashStackTrace
{
CrashStackTrace()
{
signal(SIGABRT, &CrashStackTrace::abortHandler);
signal(SIGSEGV, &CrashStackTrace::abortHandler);
signal(SIGILL, &CrashStackTrace::abortHandler);
signal(SIGFPE, &CrashStackTrace::abortHandler);
#ifdef SIGBUS
signal(SIGBUS, &CrashStackTrace::abortHandler);
#endif
}
static void abortHandler(int signum)
{
// associate each signal with a signal name string.
const char* name = nullptr;
switch(signum)
{
case SIGABRT: name = "SIGABRT"; break;
case SIGSEGV: name = "SIGSEGV"; break;
case SIGILL: name = "SIGILL"; break;
case SIGFPE: name = "SIGFPE"; break;
#ifdef SIGBUS
case SIGBUS: name = "SIGBUS"; break;
#endif
}
/** Notify the user which signal was caught. We use printf, because this
* is the most basic output function. Once you get a crash, it is
* possible that more complex output systems like streams and the like
* may be corrupted. So we make the most basic call possible to the
* lowest level, most standard print function. */
if(name)
fprintf(stderr, "Caught signal %d (%s)\n", signum, name);
else
fprintf(stderr, "Caught signal %d\n", signum);
print_stacktrace(false);
exit(-signum);
}
};

4
retroshare-gui/src/main.cpp
View File

@ -19,6 +19,10 @@
* Boston, MA 02110-1301, USA.
****************************************************************/
#include "util/stacktrace.h"
CrashStackTrace gCrashStackTrace;
#include <QObject>
#include <QMessageBox>
#include <QSplashScreen>

4
retroshare-service/src/retroshare-service.cc
View File

@ -16,6 +16,10 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "util/stacktrace.h"
CrashStackTrace gCrashStackTrace;
#include <QCoreApplication>
#include <csignal>
#include <QObject>