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Csocket.cc
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Csocket.cc
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/**
* @file Csocket.cc
* @author Jim Hull <[email protected]>
*
* Copyright (c) 1999-2012 Jim Hull <[email protected]>
* All rights reserved
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
* Redistributions in any form must be accompanied by information on how to obtain
* complete source code for this software and any accompanying software that uses this software.
* The source code must either be included in the distribution or be available for no more than
* the cost of distribution plus a nominal fee, and must be freely redistributable
* under reasonable conditions. For an executable file, complete source code means the source
* code for all modules it contains. It does not include source code for modules or files
* that typically accompany the major components of the operating system on which the executable file runs.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OF THIS SOFTWARE BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/***
* doing this because there seems to be a bug that is losing the "short" on htons when in optimize mode turns into a macro
* gcc 4.3.4
*/
#if defined(__OPTIMIZE__) && __GNUC__ == 4 && __GNUC_MINOR__ >= 3
#pragma GCC diagnostic warning "-Wconversion"
#endif /* defined(__OPTIMIZE__) && __GNUC__ == 4 && __GNUC_MINOR__ >= 3 */
#include "Csocket.h"
#ifdef __NetBSD__
#include <sys/param.h>
#endif /* __NetBSD__ */
#ifdef HAVE_LIBSSL
#include <stdio.h>
#include <openssl/ssl.h>
#include <openssl/conf.h>
#include <openssl/engine.h>
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
#include <openssl/core_names.h>
#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */
#ifndef OPENSSL_NO_COMP
#include <openssl/comp.h>
#endif
#define HAVE_ERR_REMOVE_STATE
#ifdef OPENSSL_VERSION_NUMBER
# if OPENSSL_VERSION_NUMBER >= 0x10000000
# undef HAVE_ERR_REMOVE_STATE
# define HAVE_ERR_REMOVE_THREAD_STATE
# endif
# if OPENSSL_VERSION_NUMBER < 0x10001000
# define OPENSSL_NO_TLS1_1 /* 1.0.1-pre~: openssl/openssl@637f374ad49d5f6d4f81d87d7cdd226428aa470c */
# define OPENSSL_NO_TLS1_2 /* 1.0.1-pre~: openssl/openssl@7409d7ad517650db332ae528915a570e4e0ab88b */
# endif
# ifndef LIBRESSL_VERSION_NUMBER /* forked from OpenSSL 1.0.1g, sets high version "with the idea of discouraging software from relying on magic numbers for detecting features"(!) */
# if OPENSSL_VERSION_NUMBER >= 0x10100000
# undef HAVE_ERR_REMOVE_THREAD_STATE /* 1.1.0-pre4: openssl/openssl@8509dcc9f319190c565ab6baad7c88d37a951d1c */
# undef OPENSSL_NO_SSL2 /* 1.1.0-pre4: openssl/openssl@e80381e1a3309f5d4a783bcaa508a90187a48882 */
# define OPENSSL_NO_SSL2 /* 1.1.0-pre1: openssl/openssl@45f55f6a5bdcec411ef08a6f8aae41d5d3d234ad */
# define HAVE_FLEXIBLE_TLS_METHOD /* 1.1.0-pre1: openssl/openssl@32ec41539b5b23bc42503589fcc5be65d648d1f5 */
# define HAVE_OPAQUE_SSL
# endif
# endif /* LIBRESSL_VERSION_NUMBER */
#endif /* OPENSSL_VERSION_NUMBER */
#endif /* HAVE_LIBSSL */
#ifdef HAVE_ICU
#include <unicode/ustring.h>
#include <unicode/errorcode.h>
#include <unicode/ucnv_cb.h>
#endif /* HAVE_ICU */
#include <list>
#include <algorithm>
#define CS_SRANDBUFFER 128
/*
* timeradd/timersub is missing on solaris' sys/time.h, provide
* some fallback macros
*/
#ifndef timeradd
#define timeradd(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec + (b)->tv_sec; \
(result)->tv_usec = (a)->tv_usec + (b)->tv_usec; \
if ((result)->tv_usec >= 1000000) { \
++(result)->tv_sec; \
(result)->tv_usec -= 1000000; \
} \
} while (0)
#endif
#ifndef timersub
#define timersub(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
if ((result)->tv_usec < 0) { \
--(result)->tv_sec; \
(result)->tv_usec += 1000000; \
} \
} while (0)
#endif
using std::stringstream;
using std::ostream;
using std::endl;
using std::min;
using std::vector;
#define CREATE_ARES_VER( a, b, c ) ((a<<16)|(b<<8)|c)
#ifndef _NO_CSOCKET_NS // some people may not want to use a namespace
namespace Csocket
{
#endif /* _NO_CSOCKET_NS */
static int s_iCsockSSLIdx = 0; //!< this gets setup once in InitSSL
int GetCsockSSLIdx()
{
return( s_iCsockSSLIdx );
}
#ifdef _WIN32
#if defined(_WIN32) && (!defined(_WIN32_WINNT) || (_WIN32_WINNT < 0x0600))
//! thanks to KiNgMaR @ #znc for this wrapper
static int inet_pton( int af, const char *src, void *dst )
{
sockaddr_storage aAddress;
int iAddrLen = sizeof( sockaddr_storage );
memset( &aAddress, 0, iAddrLen );
char * pTmp = strdup( src );
aAddress.ss_family = af; // this is important:
// The function fails if the sin_family member of the SOCKADDR_IN structure is not set to AF_INET or AF_INET6.
int iRet = WSAStringToAddressA( pTmp, af, NULL, ( sockaddr * )&aAddress, &iAddrLen );
free( pTmp );
if( iRet == 0 )
{
if( af == AF_INET6 )
memcpy( dst, &( ( sockaddr_in6 * ) &aAddress )->sin6_addr, sizeof( in6_addr ) );
else
memcpy( dst, &( ( sockaddr_in * ) &aAddress )->sin_addr, sizeof( in_addr ) );
return( 1 );
}
return( -1 );
}
#endif
static inline void set_non_blocking( cs_sock_t fd )
{
u_long iOpts = 1;
ioctlsocket( fd, FIONBIO, &iOpts );
}
/*
* not used by anything anymore
static inline void set_blocking(cs_sock_t fd)
{
u_long iOpts = 0;
ioctlsocket( fd, FIONBIO, &iOpts );
}
*/
static inline void set_close_on_exec( cs_sock_t fd )
{
// TODO add this for windows
// see http://gcc.gnu.org/ml/java-patches/2002-q1/msg00696.html
// for infos on how to do this
}
#else // _WIN32
static inline void set_non_blocking( cs_sock_t fd )
{
int fdflags = fcntl( fd, F_GETFL, 0 );
if( fdflags < 0 )
return; // Ignore errors
fcntl( fd, F_SETFL, fdflags|O_NONBLOCK );
}
/*
* not used by anything anymore
static inline void set_blocking(cs_sock_t fd)
{
int fdflags = fcntl(fd, F_GETFL, 0);
if( fdflags < 0 )
return; // Ignore errors
fdflags &= ~O_NONBLOCK;
fcntl( fd, F_SETFL, fdflags );
}
*/
static inline void set_close_on_exec( cs_sock_t fd )
{
int fdflags = fcntl( fd, F_GETFD, 0 );
if( fdflags < 0 )
return; // Ignore errors
fcntl( fd, F_SETFD, fdflags|FD_CLOEXEC );
}
#endif /* _WIN32 */
void CSSockAddr::SinFamily()
{
#ifdef HAVE_IPV6
m_saddr6.sin6_family = PF_INET6;
#endif /* HAVE_IPV6 */
m_saddr.sin_family = PF_INET;
}
void CSSockAddr::SinPort( uint16_t iPort )
{
#ifdef HAVE_IPV6
m_saddr6.sin6_port = htons( iPort );
#endif /* HAVE_IPV6 */
m_saddr.sin_port = htons( iPort );
}
void CSSockAddr::SetIPv6( bool b )
{
#ifndef HAVE_IPV6
if( b )
{
CS_DEBUG( "-DHAVE_IPV6 must be set during compile time to enable this feature" );
m_bIsIPv6 = false;
return;
}
#endif /* HAVE_IPV6 */
m_bIsIPv6 = b;
SinFamily();
}
#ifdef HAVE_LIBSSL
static int _PemPassCB( char *pBuff, int iBuffLen, int rwflag, void * pcSocket )
{
Csock * pSock = static_cast<Csock *>( pcSocket );
const CS_STRING & sPassword = pSock->GetPemPass();
if( iBuffLen <= 0 )
return( 0 );
memset( pBuff, '\0', iBuffLen );
if( sPassword.empty() )
return( 0 );
int iUseBytes = min( iBuffLen - 1, ( int )sPassword.length() );
memcpy( pBuff, sPassword.data(), iUseBytes );
return( iUseBytes );
}
static int _CertVerifyCB( int preverify_ok, X509_STORE_CTX *x509_ctx )
{
Csock * pSock = GetCsockFromCTX( x509_ctx );
if( pSock )
return( pSock->VerifyPeerCertificate( preverify_ok, x509_ctx ) );
return( preverify_ok );
}
static void _InfoCallback( const SSL * pSSL, int where, int ret )
{
if( ( where & SSL_CB_HANDSHAKE_DONE ) && ret != 0 )
{
Csock * pSock = static_cast<Csock *>( SSL_get_ex_data( pSSL, GetCsockSSLIdx() ) );
if( pSock )
pSock->SSLHandShakeFinished();
}
}
Csock * GetCsockFromCTX( X509_STORE_CTX * pCTX )
{
Csock * pSock = NULL;
SSL * pSSL = ( SSL * ) X509_STORE_CTX_get_ex_data( pCTX, SSL_get_ex_data_X509_STORE_CTX_idx() );
if( pSSL )
pSock = ( Csock * ) SSL_get_ex_data( pSSL, GetCsockSSLIdx() );
return( pSock );
}
#endif /* HAVE_LIBSSL */
#ifdef USE_GETHOSTBYNAME
// this issue here is getaddrinfo has a significant behavior difference when dealing with round robin dns on an
// ipv4 network. This is not desirable IMHO. so when this is compiled without ipv6 support backwards compatibility
// is maintained.
static int __GetHostByName( const CS_STRING & sHostName, struct in_addr * paddr, u_int iNumRetries )
{
int iReturn = HOST_NOT_FOUND;
struct hostent * hent = NULL;
#ifdef __linux__
char hbuff[2048];
struct hostent hentbuff;
int err;
for( u_int a = 0; a < iNumRetries; ++a )
{
memset( ( char * ) hbuff, '\0', 2048 );
iReturn = gethostbyname_r( sHostName.c_str(), &hentbuff, hbuff, 2048, &hent, &err );
if( iReturn == 0 )
break;
if( iReturn != TRY_AGAIN )
{
CS_DEBUG( "gethostyname_r: " << hstrerror( h_errno ) );
break;
}
}
if( !hent && iReturn == 0 )
iReturn = HOST_NOT_FOUND;
#else
for( u_int a = 0; a < iNumRetries; ++a )
{
iReturn = HOST_NOT_FOUND;
hent = gethostbyname( sHostName.c_str() );
if( hent )
{
iReturn = 0;
break;
}
if( h_errno != TRY_AGAIN )
{
#ifndef _WIN32
CS_DEBUG( "gethostyname: " << hstrerror( h_errno ) );
#endif /* _WIN32 */
break;
}
}
#endif /* __linux__ */
if( iReturn == 0 )
memcpy( &paddr->s_addr, hent->h_addr_list[0], sizeof( paddr->s_addr ) );
return( iReturn == TRY_AGAIN ? EAGAIN : iReturn );
}
#endif /* !USE_GETHOSTBYNAME */
#ifdef HAVE_C_ARES
void Csock::FreeAres()
{
if( m_pARESChannel )
{
ares_destroy( m_pARESChannel );
m_pARESChannel = NULL;
}
}
static void AresHostCallback( void * pArg, int status, int timeouts, struct hostent *hent )
{
Csock * pSock = ( Csock * )pArg;
if( status == ARES_SUCCESS && hent && hent->h_addr_list[0] != NULL )
{
CSSockAddr * pSockAddr = pSock->GetCurrentAddr();
if( hent->h_addrtype == AF_INET )
{
pSock->SetIPv6( false );
memcpy( pSockAddr->GetAddr(), hent->h_addr_list[0], sizeof( *( pSockAddr->GetAddr() ) ) );
}
#ifdef HAVE_IPV6
else if( hent->h_addrtype == AF_INET6 )
{
pSock->SetIPv6( true );
memcpy( pSockAddr->GetAddr6(), hent->h_addr_list[0], sizeof( *( pSockAddr->GetAddr6() ) ) );
}
#endif /* HAVE_IPV6 */
else
{
status = ARES_ENOTFOUND;
}
}
else
{
CS_DEBUG( ares_strerror( status ) );
if( status == ARES_SUCCESS )
{
CS_DEBUG( "Received ARES_SUCCESS without any useful reply, using NODATA instead" );
status = ARES_ENODATA;
}
}
pSock->SetAresFinished( status );
}
#endif /* HAVE_C_ARES */
CGetAddrInfo::CGetAddrInfo( const CS_STRING & sHostname, Csock * pSock, CSSockAddr & csSockAddr )
: m_pSock( pSock ), m_csSockAddr( csSockAddr )
{
m_sHostname = sHostname;
m_pAddrRes = NULL;
m_iRet = ETIMEDOUT;
}
CGetAddrInfo::~CGetAddrInfo()
{
if( m_pAddrRes )
freeaddrinfo( m_pAddrRes );
m_pAddrRes = NULL;
}
void CGetAddrInfo::Init()
{
memset( ( struct addrinfo * )&m_cHints, '\0', sizeof( m_cHints ) );
m_cHints.ai_family = m_csSockAddr.GetAFRequire();
m_cHints.ai_socktype = SOCK_STREAM;
m_cHints.ai_protocol = IPPROTO_TCP;
#ifdef AI_ADDRCONFIG
// this is suppose to eliminate host from appearing that this system can not support
m_cHints.ai_flags = AI_ADDRCONFIG;
#endif /* AI_ADDRCONFIG */
if( m_pSock && ( m_pSock->GetType() == Csock::LISTENER || m_pSock->GetConState() == Csock::CST_BINDVHOST ) )
{
// when doing a dns for bind only, set the AI_PASSIVE flag as suggested by the man page
m_cHints.ai_flags |= AI_PASSIVE;
}
}
int CGetAddrInfo::Process()
{
m_iRet = getaddrinfo( m_sHostname.c_str(), NULL, &m_cHints, &m_pAddrRes );
if( m_iRet == EAI_AGAIN )
return( EAGAIN );
else if( m_iRet == 0 )
return( 0 );
return( ETIMEDOUT );
}
int CGetAddrInfo::Finish()
{
if( m_iRet == 0 && m_pAddrRes )
{
std::list<struct addrinfo *> lpTryAddrs;
bool bFound = false;
for( struct addrinfo * pRes = m_pAddrRes; pRes; pRes = pRes->ai_next )
{
// pass through the list building out a lean list of candidates to try. AI_CONFIGADDR doesn't always seem to work
#ifdef __sun
if( ( pRes->ai_socktype != SOCK_STREAM ) || ( pRes->ai_protocol != IPPROTO_TCP && pRes->ai_protocol != IPPROTO_IP ) )
#else
if( ( pRes->ai_socktype != SOCK_STREAM ) || ( pRes->ai_protocol != IPPROTO_TCP ) )
#endif /* __sun work around broken impl of getaddrinfo */
continue;
if( ( m_csSockAddr.GetAFRequire() != CSSockAddr::RAF_ANY ) && ( pRes->ai_family != m_csSockAddr.GetAFRequire() ) )
continue; // they requested a special type, so be certain we woop past anything unwanted
lpTryAddrs.push_back( pRes );
}
for( std::list<struct addrinfo *>::iterator it = lpTryAddrs.begin(); it != lpTryAddrs.end(); )
{
// cycle through these, leaving the last iterator for the outside caller to call, so if there is an error it can call the events
struct addrinfo * pRes = *it;
bool bTryConnect = false;
if( pRes->ai_family == AF_INET )
{
if( m_pSock )
m_pSock->SetIPv6( false );
m_csSockAddr.SetIPv6( false );
struct sockaddr_in * pTmp = ( struct sockaddr_in * )pRes->ai_addr;
memcpy( m_csSockAddr.GetAddr(), &( pTmp->sin_addr ), sizeof( *( m_csSockAddr.GetAddr() ) ) );
if( m_pSock && m_pSock->GetConState() == Csock::CST_DESTDNS && m_pSock->GetType() == Csock::OUTBOUND )
{
bTryConnect = true;
}
else
{
bFound = true;
break;
}
}
#ifdef HAVE_IPV6
else if( pRes->ai_family == AF_INET6 )
{
if( m_pSock )
m_pSock->SetIPv6( true );
m_csSockAddr.SetIPv6( true );
struct sockaddr_in6 * pTmp = ( struct sockaddr_in6 * )pRes->ai_addr;
memcpy( m_csSockAddr.GetAddr6(), &( pTmp->sin6_addr ), sizeof( *( m_csSockAddr.GetAddr6() ) ) );
if( m_pSock && m_pSock->GetConState() == Csock::CST_DESTDNS && m_pSock->GetType() == Csock::OUTBOUND )
{
bTryConnect = true;
}
else
{
bFound = true;
break;
}
}
#endif /* HAVE_IPV6 */
++it; // increment the iterator her so we know if its the last element or not
if( bTryConnect && it != lpTryAddrs.end() )
{
// save the last attempt for the outer loop, the issue then becomes that the error is thrown on the last failure
if( m_pSock->CreateSocksFD() && m_pSock->Connect() )
{
m_pSock->SetSkipConnect( true ); // this tells the socket that the connection state has been started
bFound = true;
break;
}
m_pSock->CloseSocksFD();
}
else if( bTryConnect )
{
bFound = true;
}
}
if( bFound ) // the data pointed to here is invalid now, but the pointer itself is a good test
{
return( 0 );
}
}
return( ETIMEDOUT );
}
int CS_GetAddrInfo( const CS_STRING & sHostname, Csock * pSock, CSSockAddr & csSockAddr )
{
#ifdef USE_GETHOSTBYNAME
if( pSock )
pSock->SetIPv6( false );
csSockAddr.SetIPv6( false );
int iRet = __GetHostByName( sHostname, csSockAddr.GetAddr(), 3 );
return( iRet );
#else
CGetAddrInfo cInfo( sHostname, pSock, csSockAddr );
cInfo.Init();
int iRet = cInfo.Process();
if( iRet != 0 )
return( iRet );
return( cInfo.Finish() );
#endif /* USE_GETHOSTBYNAME */
}
int Csock::ConvertAddress( const struct sockaddr_storage * pAddr, socklen_t iAddrLen, CS_STRING & sIP, uint16_t * piPort ) const
{
char szHostname[NI_MAXHOST];
char szServ[NI_MAXSERV];
int iRet = getnameinfo( ( const struct sockaddr * )pAddr, iAddrLen, szHostname, NI_MAXHOST, szServ, NI_MAXSERV, NI_NUMERICHOST|NI_NUMERICSERV );
if( iRet == 0 )
{
sIP = szHostname;
if( piPort )
*piPort = ( uint16_t )atoi( szServ );
}
return( iRet );
}
bool InitCsocket()
{
#ifdef _WIN32
WSADATA wsaData;
int iResult = WSAStartup( MAKEWORD( 2, 2 ), &wsaData );
if( iResult != NO_ERROR )
return( false );
#endif /* _WIN32 */
#ifdef HAVE_C_ARES
#if ARES_VERSION >= CREATE_ARES_VER( 1, 6, 1 )
if( ares_library_init( ARES_LIB_INIT_ALL ) != 0 )
return( false );
#endif /* ARES_VERSION >= CREATE_ARES_VER( 1, 6, 1 ) */
#endif /* HAVE_C_ARES */
#ifdef HAVE_LIBSSL
if( !InitSSL() )
return( false );
#endif /* HAVE_LIBSSL */
return( true );
}
void ShutdownCsocket()
{
#ifdef HAVE_LIBSSL
#if defined( HAVE_ERR_REMOVE_THREAD_STATE )
ERR_remove_thread_state( NULL );
#elif defined( HAVE_ERR_REMOVE_STATE )
ERR_remove_state( 0 );
#endif
#ifndef OPENSSL_NO_ENGINE
ENGINE_cleanup();
#endif
#ifndef OPENSSL_IS_BORINGSSL
CONF_modules_unload( 1 );
#endif
ERR_free_strings();
EVP_cleanup();
CRYPTO_cleanup_all_ex_data();
#endif /* HAVE_LIBSSL */
#ifdef HAVE_C_ARES
#if ARES_VERSION >= CREATE_ARES_VER( 1, 6, 1 )
ares_library_cleanup();
#endif /* ARES_VERSION >= CREATE_ARES_VER( 1, 6, 1 ) */
#endif /* HAVE_C_ARES */
#ifdef _WIN32
WSACleanup();
#endif /* _WIN32 */
}
#ifdef HAVE_LIBSSL
bool InitSSL( ECompType eCompressionType )
{
SSL_load_error_strings();
if( SSL_library_init() != 1 )
{
CS_DEBUG( "SSL_library_init() failed!" );
return( false );
}
#ifndef _WIN32
if( access( "/dev/urandom", R_OK ) == 0 )
{
RAND_load_file( "/dev/urandom", 1024 );
}
else if( access( "/dev/random", R_OK ) == 0 )
{
RAND_load_file( "/dev/random", 1024 );
}
else
{
CS_DEBUG( "Unable to locate entropy location! Tried /dev/urandom and /dev/random" );
return( false );
}
#endif /* _WIN32 */
#ifndef OPENSSL_NO_COMP
COMP_METHOD *cm = NULL;
if( CT_ZLIB & eCompressionType )
{
cm = COMP_zlib();
if( cm )
SSL_COMP_add_compression_method( CT_ZLIB, cm );
}
#endif
// setting this up once in the begining
s_iCsockSSLIdx = SSL_get_ex_new_index( 0, NULL, NULL, NULL, NULL );
return( true );
}
void SSLErrors( const char *filename, u_int iLineNum )
{
unsigned long iSSLError = 0;
while( ( iSSLError = ERR_get_error() ) != 0 )
{
CS_DEBUG( "at " << filename << ":" << iLineNum );
char szError[512];
memset( ( char * ) szError, '\0', 512 );
ERR_error_string_n( iSSLError, szError, 511 );
if( *szError )
CS_DEBUG( szError );
}
}
#endif /* HAVE_LIBSSL */
void CSAdjustTVTimeout( struct timeval & tv, long iTimeoutMS )
{
if( iTimeoutMS >= 0 )
{
long iCurTimeout = tv.tv_usec / 1000;
iCurTimeout += tv.tv_sec * 1000;
if( iCurTimeout > iTimeoutMS )
{
tv.tv_sec = iTimeoutMS / 1000;
tv.tv_usec = iTimeoutMS % 1000;
}
}
}
#define CS_UNKNOWN_ERROR "Unknown Error"
static const char * CS_StrError( int iErrno, char * pszBuff, size_t uBuffLen )
{
#if defined( sgi ) || defined(__sun) || (defined(__NetBSD_Version__) && __NetBSD_Version__ < 4000000000)
return( strerror( iErrno ) );
#else
memset( pszBuff, '\0', uBuffLen );
#if defined( _WIN32 )
if ( strerror_s( pszBuff, uBuffLen, iErrno ) == 0 )
return( pszBuff );
#elif !defined( _GNU_SOURCE ) || !defined(__GLIBC__) || defined( __FreeBSD__ )
if( strerror_r( iErrno, pszBuff, uBuffLen ) == 0 )
return( pszBuff );
#else
return( strerror_r( iErrno, pszBuff, uBuffLen ) );
#endif /* (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined( _GNU_SOURCE ) */
#endif /* defined( sgi ) || defined(__sun) || defined(_WIN32) || (defined(__NetBSD_Version__) && __NetBSD_Version__ < 4000000000) */
return( CS_UNKNOWN_ERROR );
}
void __Perror( const CS_STRING & s, const char * pszFile, u_int iLineNo )
{
char szBuff[0xff];
std::cerr << s << "(" << pszFile << ":" << iLineNo << "): " << CS_StrError( GetSockError(), szBuff, 0xff ) << endl;
}
uint64_t millitime()
{
uint64_t iTime = 0;
#ifdef _WIN32
struct timeb tm;
ftime( &tm );
iTime = tm.time * 1000;
iTime += tm.millitm;
#else
struct timeval tv;
gettimeofday( &tv, NULL );
iTime = ( uint64_t )tv.tv_sec * 1000;
iTime += ( ( uint64_t )tv.tv_usec / 1000 );
#endif /* _WIN32 */
return( iTime );
}
#ifndef _MSC_VER
#define CS_GETTIMEOFDAY gettimeofday
#else
#define CS_GETTIMEOFDAY win32_gettimeofday
// timezone-agnostic implementation of gettimeofday
static int
win32_gettimeofday( struct timeval* now, void* )
{
static const ULONGLONG epoch = 116444736000000000ULL; // Jan 1st 1970
ULARGE_INTEGER file_time;
SYSTEMTIME system_time;
GetSystemTime( &system_time );
if ( !SystemTimeToFileTime( &system_time, ( LPFILETIME )&file_time) )
return( 1 );
now->tv_sec = ( long )( ( file_time.QuadPart - epoch ) / 10000000L );
now->tv_usec = ( long )( system_time.wMilliseconds * 1000 );
return 0;
}
#endif
#ifndef _NO_CSOCKET_NS // some people may not want to use a namespace
}
using namespace Csocket;
#endif /* _NO_CSOCKET_NS */
CCron::CCron()
{
m_iCycles = 0;
m_iMaxCycles = 0;
m_bActive = true;
timerclear( &m_tTime );
m_tTimeSequence.tv_sec = 60;
m_tTimeSequence.tv_usec = 0;
m_bPause = false;
m_bRunOnNextCall = false;
}
void CCron::run( timeval & tNow )
{
if( m_bPause )
return;
if( !timerisset( &tNow ) )
CS_GETTIMEOFDAY( &tNow, NULL );
if( m_bActive && ( !timercmp( &tNow, &m_tTime, < ) || m_bRunOnNextCall ) )
{
m_bRunOnNextCall = false; // Setting this here because RunJob() could set it back to true
RunJob();
if( m_iMaxCycles > 0 && ++m_iCycles >= m_iMaxCycles )
m_bActive = false;
else
timeradd( &tNow, &m_tTimeSequence, &m_tTime );
}
}
void CCron::StartMaxCycles( double dTimeSequence, u_int iMaxCycles )
{
timeval tNow;
m_tTimeSequence.tv_sec = ( time_t ) dTimeSequence;
// this could be done with modf(), but we're avoiding bringing in libm just for the one function.
m_tTimeSequence.tv_usec = ( suseconds_t )( ( dTimeSequence - ( double )( ( time_t ) dTimeSequence ) ) * 1000000 );
CS_GETTIMEOFDAY( &tNow, NULL );
timeradd( &tNow, &m_tTimeSequence, &m_tTime );
m_iMaxCycles = iMaxCycles;
m_bActive = true;
}
void CCron::StartMaxCycles( const timeval& tTimeSequence, u_int iMaxCycles )
{
timeval tNow;
m_tTimeSequence = tTimeSequence;
CS_GETTIMEOFDAY( &tNow, NULL );
timeradd( &tNow, &m_tTimeSequence, &m_tTime );
m_iMaxCycles = iMaxCycles;
m_bActive = true;
}
void CCron::Start( double dTimeSequence )
{
StartMaxCycles( dTimeSequence, 0 );
}
void CCron::Start( const timeval& tTimeSequence )
{
StartMaxCycles( tTimeSequence, 0 );
}
void CCron::Stop()
{
m_bActive = false;
}
void CCron::Pause()
{
m_bPause = true;
}
void CCron::UnPause()
{
m_bPause = false;
}
void CCron::Reset()
{
Stop();
Start(m_tTimeSequence);
}
timeval CCron::GetInterval() const { return( m_tTimeSequence ); }
u_int CCron::GetMaxCycles() const { return( m_iMaxCycles ); }
u_int CCron::GetCyclesLeft() const { return( ( m_iMaxCycles > m_iCycles ? ( m_iMaxCycles - m_iCycles ) : 0 ) ); }
bool CCron::isValid() const { return( m_bActive ); }
const CS_STRING & CCron::GetName() const { return( m_sName ); }
void CCron::SetName( const CS_STRING & sName ) { m_sName = sName; }
void CCron::RunJob() { CS_DEBUG( "This should be overridden" ); }
bool CSMonitorFD::GatherFDsForSelect( std::map< cs_sock_t, short > & miiReadyFds, long & iTimeoutMS )
{
iTimeoutMS = -1; // don't bother changing anything in the default implementation
for( std::map< cs_sock_t, short >::iterator it = m_miiMonitorFDs.begin(); it != m_miiMonitorFDs.end(); ++it )
{
miiReadyFds[it->first] = it->second;
}
return( m_bEnabled );
}
bool CSMonitorFD::CheckFDs( const std::map< cs_sock_t, short > & miiReadyFds )
{
std::map< cs_sock_t, short > miiTriggerdFds;
for( std::map< cs_sock_t, short >::iterator it = m_miiMonitorFDs.begin(); it != m_miiMonitorFDs.end(); ++it )
{
std::map< cs_sock_t, short >::const_iterator itFD = miiReadyFds.find( it->first );
if( itFD != miiReadyFds.end() )
miiTriggerdFds[itFD->first] = itFD->second;
}
if( !miiTriggerdFds.empty() )
return( FDsThatTriggered( miiTriggerdFds ) );
return( m_bEnabled );
}
CSockCommon::~CSockCommon()
{
// delete any left over crons
CleanupCrons();
CleanupFDMonitors();
}
void CSockCommon::CleanupCrons()
{
for( size_t a = 0; a < m_vcCrons.size(); ++a )
CS_Delete( m_vcCrons[a] );
m_vcCrons.clear();
}
void CSockCommon::CleanupFDMonitors()
{
for( size_t a = 0; a < m_vcMonitorFD.size(); ++a )
CS_Delete( m_vcMonitorFD[a] );
m_vcMonitorFD.clear();
}
void CSockCommon::CheckFDs( const std::map< cs_sock_t, short > & miiReadyFds )
{
for( size_t uMon = 0; uMon < m_vcMonitorFD.size(); ++uMon )
{
if( !m_vcMonitorFD[uMon]->IsEnabled() || !m_vcMonitorFD[uMon]->CheckFDs( miiReadyFds ) )
m_vcMonitorFD.erase( m_vcMonitorFD.begin() + uMon-- );
}
}
void CSockCommon::AssignFDs( std::map< cs_sock_t, short > & miiReadyFds, struct timeval * tvtimeout )
{
for( size_t uMon = 0; uMon < m_vcMonitorFD.size(); ++uMon )
{
long iTimeoutMS = -1;
if( m_vcMonitorFD[uMon]->IsEnabled() && m_vcMonitorFD[uMon]->GatherFDsForSelect( miiReadyFds, iTimeoutMS ) )
{
CSAdjustTVTimeout( *tvtimeout, iTimeoutMS );
}
else
{
CS_Delete( m_vcMonitorFD[uMon] );
m_vcMonitorFD.erase( m_vcMonitorFD.begin() + uMon-- );
}
}
}
void CSockCommon::Cron()
{
timeval tNow;
timerclear( &tNow );
for( vector<CCron *>::size_type a = 0; a < m_vcCrons.size(); ++a )
{
CCron * pcCron = m_vcCrons[a];
if( !pcCron->isValid() )
{
CS_Delete( pcCron );
m_vcCrons.erase( m_vcCrons.begin() + a-- );
}
else
{
pcCron->run( tNow );
}
}
}
void CSockCommon::AddCron( CCron * pcCron )
{
m_vcCrons.push_back( pcCron );
}
void CSockCommon::DelCron( const CS_STRING & sName, bool bDeleteAll, bool bCaseSensitive )
{
for( size_t a = 0; a < m_vcCrons.size(); ++a )
{
int ( *Cmp )( const char *, const char * ) = ( bCaseSensitive ? strcmp : strcasecmp );
if( Cmp( m_vcCrons[a]->GetName().c_str(), sName.c_str() ) == 0 )
{
m_vcCrons[a]->Stop();
CS_Delete( m_vcCrons[a] );
m_vcCrons.erase( m_vcCrons.begin() + a-- );
if( !bDeleteAll )
break;
}
}
}
void CSockCommon::DelCron( u_int iPos )
{
if( iPos < m_vcCrons.size() )
{
m_vcCrons[iPos]->Stop();
CS_Delete( m_vcCrons[iPos] );
m_vcCrons.erase( m_vcCrons.begin() + iPos );
}
}
void CSockCommon::DelCronByAddr( CCron * pcCron )
{
for( size_t a = 0; a < m_vcCrons.size(); ++a )
{
if( m_vcCrons[a] == pcCron )
{
m_vcCrons[a]->Stop();
CS_Delete( m_vcCrons[a] );
m_vcCrons.erase( m_vcCrons.begin() + a );
return;
}
}
}
Csock::Csock( int iTimeout ) : CSockCommon()
{
#ifdef HAVE_LIBSSL
m_pCerVerifyCB = _CertVerifyCB;
#endif /* HAVE_LIBSSL */
Init( "", 0, iTimeout );
}
Csock::Csock( const CS_STRING & sHostname, uint16_t iport, int iTimeout ) : CSockCommon()
{