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wxWidgets/src/unix/sockunix.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: src/unix/sockunix.cpp
// Purpose: wxSocketImpl implementation for Unix systems
// Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia, David Elliott,
// Vadim Zeitlin
// Created: April 1997
// RCS-ID: $Id$
// Copyright: (c) 1997 Guilhem Lavaux
// (c) 2008 Vadim Zeitlin
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#include "wx/wxprec.h"
#if wxUSE_SOCKETS
#include "wx/private/fd.h"
#include "wx/private/socket.h"
#include "wx/unix/private/sockunix.h"
#if defined(__VISAGECPP__)
#define BSD_SELECT /* use Berkeley Sockets select */
#endif
#if defined(__WATCOMC__)
#include <errno.h>
#include <nerrno.h>
#endif
#include <assert.h>
#include <sys/types.h>
#ifdef __VISAGECPP__
#include <string.h>
#include <sys/time.h>
#include <types.h>
#include <netinet/in.h>
#endif
#include <netdb.h>
#include <sys/ioctl.h>
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#ifdef __VMS__
#include <socket.h>
struct sockaddr_un
{
u_char sun_len; /* sockaddr len including null */
u_char sun_family; /* AF_UNIX */
char sun_path[108]; /* path name (gag) */
};
#else
#include <sys/socket.h>
#include <sys/un.h>
#endif
#ifndef __VISAGECPP__
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#else
#include <nerrno.h>
# if __IBMCPP__ < 400
#include <machine/endian.h>
#include <socket.h>
#include <ioctl.h>
#include <select.h>
#include <unistd.h>
#define EBADF SOCEBADF
# ifdef min
# undef min
# endif
# else
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#define close(a) soclose(a)
#define select(a,b,c,d,e) bsdselect(a,b,c,d,e)
int _System bsdselect(int,
struct fd_set *,
struct fd_set *,
struct fd_set *,
struct timeval *);
int _System soclose(int);
# endif
#endif
#ifdef __EMX__
#include <sys/select.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <ctype.h>
#ifdef sun
# include <sys/filio.h>
#endif
#ifdef sgi
# include <bstring.h>
#endif
#ifdef _AIX
# include <strings.h>
#endif
#include <signal.h>
#ifndef WX_SOCKLEN_T
#ifdef VMS
# define WX_SOCKLEN_T unsigned int
#else
# ifdef __GLIBC__
# if __GLIBC__ == 2
# define WX_SOCKLEN_T socklen_t
# endif
# elif defined(__WXMAC__)
# define WX_SOCKLEN_T socklen_t
# else
# define WX_SOCKLEN_T int
# endif
#endif
#endif /* SOCKLEN_T */
#ifndef SOCKOPTLEN_T
#define SOCKOPTLEN_T WX_SOCKLEN_T
#endif
/* UnixWare reportedly needs this for FIONBIO definition */
#ifdef __UNIXWARE__
#include <sys/filio.h>
#endif
/*
* INADDR_BROADCAST is identical to INADDR_NONE which is not defined
* on all systems. INADDR_BROADCAST should be fine to indicate an error.
*/
#ifndef INADDR_NONE
#define INADDR_NONE INADDR_BROADCAST
#endif
#if defined(__VISAGECPP__) || defined(__WATCOMC__)
#define MASK_SIGNAL() {
#define UNMASK_SIGNAL() }
#else
extern "C" { typedef void (*wxSigHandler)(int); }
#define MASK_SIGNAL() \
{ \
wxSigHandler old_handler = signal(SIGPIPE, SIG_IGN);
#define UNMASK_SIGNAL() \
signal(SIGPIPE, old_handler); \
}
#endif
/* If a SIGPIPE is issued by a socket call on a remotely closed socket,
the program will "crash" unless it explicitly handles the SIGPIPE.
By using MSG_NOSIGNAL, the SIGPIPE is suppressed. Later, we will
use SO_NOSIGPIPE (if available), the BSD equivalent. */
#ifdef MSG_NOSIGNAL
# define GSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL
#else /* MSG_NOSIGNAL not available (FreeBSD including OS X) */
# define GSOCKET_MSG_NOSIGNAL 0
#endif /* MSG_NOSIGNAL */
#if wxUSE_THREADS && (defined(HAVE_GETHOSTBYNAME) || defined(HAVE_GETSERVBYNAME))
# include "wx/thread.h"
#endif
#if defined(HAVE_GETHOSTBYNAME)
static struct hostent * deepCopyHostent(struct hostent *h,
const struct hostent *he,
char *buffer, int size, int *err)
{
/* copy old structure */
memcpy(h, he, sizeof(struct hostent));
/* copy name */
int len = strlen(h->h_name);
if (len > size)
{
*err = ENOMEM;
return NULL;
}
memcpy(buffer, h->h_name, len);
buffer[len] = '\0';
h->h_name = buffer;
/* track position in the buffer */
int pos = len + 1;
/* reuse len to store address length */
len = h->h_length;
/* ensure pointer alignment */
unsigned int misalign = sizeof(char *) - pos%sizeof(char *);
if(misalign < sizeof(char *))
pos += misalign;
/* leave space for pointer list */
char **p = h->h_addr_list, **q;
char **h_addr_list = (char **)(buffer + pos);
while(*(p++) != 0)
pos += sizeof(char *);
/* copy addresses and fill new pointer list */
for (p = h->h_addr_list, q = h_addr_list; *p != 0; p++, q++)
{
if (size < pos + len)
{
*err = ENOMEM;
return NULL;
}
memcpy(buffer + pos, *p, len); /* copy content */
*q = buffer + pos; /* set copied pointer to copied content */
pos += len;
}
*++q = 0; /* null terminate the pointer list */
h->h_addr_list = h_addr_list; /* copy pointer to pointers */
/* ensure word alignment of pointers */
misalign = sizeof(char *) - pos%sizeof(char *);
if(misalign < sizeof(char *))
pos += misalign;
/* leave space for pointer list */
p = h->h_aliases;
char **h_aliases = (char **)(buffer + pos);
while(*(p++) != 0)
pos += sizeof(char *);
/* copy aliases and fill new pointer list */
for (p = h->h_aliases, q = h_aliases; *p != 0; p++, q++)
{
len = strlen(*p);
if (size <= pos + len)
{
*err = ENOMEM;
return NULL;
}
memcpy(buffer + pos, *p, len); /* copy content */
buffer[pos + len] = '\0';
*q = buffer + pos; /* set copied pointer to copied content */
pos += len + 1;
}
*++q = 0; /* null terminate the pointer list */
h->h_aliases = h_aliases; /* copy pointer to pointers */
return h;
}
#endif
#if defined(HAVE_GETHOSTBYNAME) && wxUSE_THREADS
static wxMutex nameLock;
#endif
struct hostent * wxGethostbyname_r(const char *hostname, struct hostent *h,
void *buffer, int size, int *err)
{
struct hostent *he = NULL;
*err = 0;
#if defined(HAVE_FUNC_GETHOSTBYNAME_R_6)
if (gethostbyname_r(hostname, h, (char*)buffer, size, &he, err))
he = NULL;
#elif defined(HAVE_FUNC_GETHOSTBYNAME_R_5)
he = gethostbyname_r(hostname, h, (char*)buffer, size, err);
#elif defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
if (gethostbyname_r(hostname, h, (struct hostent_data*) buffer))
{
he = NULL;
*err = h_errno;
}
else
he = h;
#elif defined(HAVE_GETHOSTBYNAME)
#if wxUSE_THREADS
wxMutexLocker locker(nameLock);
#endif
he = gethostbyname(hostname);
if (!he)
*err = h_errno;
else
he = deepCopyHostent(h, he, (char*)buffer, size, err);
#endif
return he;
}
#if defined(HAVE_GETHOSTBYNAME) && wxUSE_THREADS
static wxMutex addrLock;
#endif
struct hostent * wxGethostbyaddr_r(const char *addr_buf, int buf_size,
int proto, struct hostent *h,
void *buffer, int size, int *err)
{
struct hostent *he = NULL;
*err = 0;
#if defined(HAVE_FUNC_GETHOSTBYNAME_R_6)
if (gethostbyaddr_r(addr_buf, buf_size, proto, h,
(char*)buffer, size, &he, err))
he = NULL;
#elif defined(HAVE_FUNC_GETHOSTBYNAME_R_5)
he = gethostbyaddr_r(addr_buf, buf_size, proto, h, (char*)buffer, size, err);
#elif defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
if (gethostbyaddr_r(addr_buf, buf_size, proto, h,
(struct hostent_data*) buffer))
{
he = NULL;
*err = h_errno;
}
else
he = h;
#elif defined(HAVE_GETHOSTBYNAME)
#if wxUSE_THREADS
wxMutexLocker locker(addrLock);
#endif
he = gethostbyaddr(addr_buf, buf_size, proto);
if (!he)
*err = h_errno;
else
he = deepCopyHostent(h, he, (char*)buffer, size, err);
#endif
return he;
}
#if defined(HAVE_GETSERVBYNAME)
static struct servent * deepCopyServent(struct servent *s,
const struct servent *se,
char *buffer, int size)
{
/* copy plain old structure */
memcpy(s, se, sizeof(struct servent));
/* copy name */
int len = strlen(s->s_name);
if (len >= size)
{
return NULL;
}
memcpy(buffer, s->s_name, len);
buffer[len] = '\0';
s->s_name = buffer;
/* track position in the buffer */
int pos = len + 1;
/* copy protocol */
len = strlen(s->s_proto);
if (pos + len >= size)
{
return NULL;
}
memcpy(buffer + pos, s->s_proto, len);
buffer[pos + len] = '\0';
s->s_proto = buffer + pos;
/* track position in the buffer */
pos += len + 1;
/* ensure pointer alignment */
unsigned int misalign = sizeof(char *) - pos%sizeof(char *);
if(misalign < sizeof(char *))
pos += misalign;
/* leave space for pointer list */
char **p = s->s_aliases, **q;
char **s_aliases = (char **)(buffer + pos);
while(*(p++) != 0)
pos += sizeof(char *);
/* copy addresses and fill new pointer list */
for (p = s->s_aliases, q = s_aliases; *p != 0; p++, q++){
len = strlen(*p);
if (size <= pos + len)
{
return NULL;
}
memcpy(buffer + pos, *p, len); /* copy content */
buffer[pos + len] = '\0';
*q = buffer + pos; /* set copied pointer to copied content */
pos += len + 1;
}
*++q = 0; /* null terminate the pointer list */
s->s_aliases = s_aliases; /* copy pointer to pointers */
return s;
}
#endif
#if defined(HAVE_GETSERVBYNAME) && wxUSE_THREADS
static wxMutex servLock;
#endif
struct servent *wxGetservbyname_r(const char *port, const char *protocol,
struct servent *serv, void *buffer, int size)
{
struct servent *se = NULL;
#if defined(HAVE_FUNC_GETSERVBYNAME_R_6)
if (getservbyname_r(port, protocol, serv, (char*)buffer, size, &se))
se = NULL;
#elif defined(HAVE_FUNC_GETSERVBYNAME_R_5)
se = getservbyname_r(port, protocol, serv, (char*)buffer, size);
#elif defined(HAVE_FUNC_GETSERVBYNAME_R_4)
if (getservbyname_r(port, protocol, serv, (struct servent_data*) buffer))
se = NULL;
else
se = serv;
#elif defined(HAVE_GETSERVBYNAME)
#if wxUSE_THREADS
wxMutexLocker locker(servLock);
#endif
se = getservbyname(port, protocol);
if (se)
se = deepCopyServent(serv, se, (char*)buffer, size);
#endif
return se;
}
/* debugging helpers */
#ifdef __GSOCKET_DEBUG__
# define SOCKET_DEBUG(args) printf args
#else
# define SOCKET_DEBUG(args)
#endif /* __GSOCKET_DEBUG__ */
/* static */
wxSocketImpl *wxSocketImpl::Create(wxSocketBase& wxsocket)
{
return new wxSocketImplUnix(wxsocket);
}
/*
* Disallow further read/write operations on this socket, close
* the fd and disable all callbacks.
*/
void wxSocketImplUnix::Shutdown()
{
/* Don't allow events to fire after socket has been closed */
DisableEvents();
wxSocketImpl::Shutdown();
}
/*
* Waits for an incoming client connection. Returns a pointer to
* a wxSocketImplUnix object, or NULL if there was an error, in which case
* the last error field will be updated for the calling wxSocketImplUnix.
*
* Error codes (set in the calling wxSocketImplUnix)
* wxSOCKET_INVSOCK - the socket is not valid or not a server.
* wxSOCKET_TIMEDOUT - timeout, no incoming connections.
* wxSOCKET_WOULDBLOCK - the call would block and the socket is nonblocking.
* wxSOCKET_MEMERR - couldn't allocate memory.
* wxSOCKET_IOERR - low-level error.
*/
wxSocketImpl *wxSocketImplUnix::WaitConnection(wxSocketBase& wxsocket)
{
wxSockAddr from;
WX_SOCKLEN_T fromlen = sizeof(from);
wxSocketImpl *connection;
wxSocketError err;
int arg = 1;
/* If the socket has already been created, we exit immediately */
if (m_fd == INVALID_SOCKET || !m_server)
{
m_error = wxSOCKET_INVSOCK;
return NULL;
}
/* Create a wxSocketImplUnix object for the new connection */
connection = wxSocketImplUnix::Create(wxsocket);
if (!connection)
{
m_error = wxSOCKET_MEMERR;
return NULL;
}
/* Wait for a connection (with timeout) */
if ( !BlockForInputWithTimeout() )
{
delete connection;
return NULL;
}
connection->m_fd = accept(m_fd, (sockaddr*)&from, (WX_SOCKLEN_T *) &fromlen);
/* Reenable CONNECTION events */
EnableEvent(wxSOCKET_CONNECTION);
if (connection->m_fd == INVALID_SOCKET)
{
if (errno == EWOULDBLOCK)
m_error = wxSOCKET_WOULDBLOCK;
else
m_error = wxSOCKET_IOERR;
delete connection;
return NULL;
}
/* Initialize all fields */
connection->m_server = false;
connection->m_stream = true;
/* Setup the peer address field */
connection->m_peer = GAddress_new();
if (!connection->m_peer)
{
delete connection;
m_error = wxSOCKET_MEMERR;
return NULL;
}
err = _GAddress_translate_from(connection->m_peer, (sockaddr*)&from, fromlen);
if (err != wxSOCKET_NOERROR)
{
delete connection;
m_error = err;
return NULL;
}
#if defined(__EMX__) || defined(__VISAGECPP__)
ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
#else
ioctl(connection->m_fd, FIONBIO, &arg);
#endif
if (m_use_events)
connection->Notify(true);
return connection;
}
void wxSocketImplUnix::Notify(bool flag)
{
if (flag == m_use_events)
return;
m_use_events = flag;
DoEnableEvents(flag);
}
void wxSocketImplUnix::DoEnableEvents(bool flag)
{
wxSocketManager * const manager = wxSocketManager::Get();
if ( flag )
{
manager->Install_Callback(this, wxSOCKET_INPUT);
manager->Install_Callback(this, wxSOCKET_OUTPUT);
}
else // off
{
manager->Uninstall_Callback(this, wxSOCKET_INPUT);
manager->Uninstall_Callback(this, wxSOCKET_OUTPUT);
}
}
wxSocketError wxSocketImplUnix::DoHandleConnect(int ret)
{
/* We only call EnableEvents() if we know we aren't shutting down the socket.
* NB: EnableEvents() needs to be called whether the socket is blocking or
* non-blocking, it just shouldn't be called prior to knowing there is a
* connection _if_ blocking sockets are being used.
* If connect above returns 0, we are already connected and need to make the
* call to EnableEvents() now.
*/
if ( m_non_blocking || (ret == 0) )
EnableEvents();
if (ret == -1)
{
const int err = errno;
/* If connect failed with EINPROGRESS and the wxSocketImplUnix object
* is in blocking mode, we select() for the specified timeout
* checking for writability to see if the connection request
* completes.
*/
if ((err == EINPROGRESS) && (!m_non_blocking))
{
if ( !BlockForOutputWithTimeout() )
{
Close();
return wxSOCKET_TIMEDOUT;
}
int error;
SOCKOPTLEN_T len = sizeof(error);
getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*) &error, &len);
EnableEvents();
if (!error)
return wxSOCKET_NOERROR;
}
/* If connect failed with EINPROGRESS and the wxSocketImplUnix object
* is set to nonblocking, we set m_error to wxSOCKET_WOULDBLOCK
* (and return wxSOCKET_WOULDBLOCK) but we don't close the socket;
* this way if the connection completes, a wxSOCKET_CONNECTION
* event will be generated, if enabled.
*/
if ((err == EINPROGRESS) && (m_non_blocking))
{
m_establishing = true;
m_error = wxSOCKET_WOULDBLOCK;
return wxSOCKET_WOULDBLOCK;
}
/* If connect failed with an error other than EINPROGRESS,
* then the call to Connect has failed.
*/
Close();
m_error = wxSOCKET_IOERR;
return wxSOCKET_IOERR;
}
return wxSOCKET_NOERROR;
}
/* Generic IO */
/* Like recv(), send(), ... */
int wxSocketImplUnix::Read(void *buffer, int size)
{
int ret;
if (m_fd == INVALID_SOCKET || m_server)
{
m_error = wxSOCKET_INVSOCK;
return -1;
}
/* Disable events during query of socket status */
DisableEvent(wxSOCKET_INPUT);
/* If the socket is blocking, wait for data (with a timeout) */
if ( !BlockForInputWithTimeout() )
{
m_error = wxSOCKET_TIMEDOUT;
/* Don't return here immediately, otherwise socket events would not be
* re-enabled! */
ret = -1;
}
else
{
/* Read the data */
if (m_stream)
ret = Recv_Stream(buffer, size);
else
ret = Recv_Dgram(buffer, size);
/*
* If recv returned zero for a TCP socket (if m_stream == NULL, it's an UDP
* socket and empty datagrams are possible), then the connection has been
* gracefully closed.
*
* Otherwise, recv has returned an error (-1), in which case we have lost
* the socket only if errno does _not_ indicate that there may be more data
* to read.
*/
if ((ret == 0) && m_stream)
{
/* Make sure wxSOCKET_LOST event gets sent and shut down the socket */
if (m_use_events)
{
m_detected = wxSOCKET_LOST_FLAG;
OnReadWaiting();
return 0;
}
}
else if (ret == -1)
{
if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
m_error = wxSOCKET_WOULDBLOCK;
else
m_error = wxSOCKET_IOERR;
}
}
/* Enable events again now that we are done processing */
EnableEvent(wxSOCKET_INPUT);
return ret;
}
int wxSocketImplUnix::Write(const void *buffer, int size)
{
int ret;
SOCKET_DEBUG(( "Write #1, size %d\n", size ));
if (m_fd == INVALID_SOCKET || m_server)
{
m_error = wxSOCKET_INVSOCK;
return -1;
}
SOCKET_DEBUG(( "Write #2, size %d\n", size ));
/* If the socket is blocking, wait for writability (with a timeout) */
if ( !BlockForOutputWithTimeout() )
return -1;
SOCKET_DEBUG(( "Write #3, size %d\n", size ));
/* Write the data */
if (m_stream)
ret = Send_Stream(buffer, size);
else
ret = Send_Dgram(buffer, size);
SOCKET_DEBUG(( "Write #4, size %d\n", size ));
if (ret == -1)
{
if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
{
m_error = wxSOCKET_WOULDBLOCK;
SOCKET_DEBUG(( "Write error WOULDBLOCK\n" ));
}
else
{
m_error = wxSOCKET_IOERR;
SOCKET_DEBUG(( "Write error IOERR\n" ));
}
/* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
* in MSW). Once the first OUTPUT event is received, users can assume
* that the socket is writable until a read operation fails. Only then
* will further OUTPUT events be posted.
*/
EnableEvent(wxSOCKET_OUTPUT);
return -1;
}
SOCKET_DEBUG(( "Write #5, size %d ret %d\n", size, ret ));
return ret;
}
/* Flags */
void wxSocketImplUnix::EnableEvent(wxSocketNotify event)
{
if (m_use_events)
{
m_detected &= ~(1 << event);
wxSocketManager::Get()->Install_Callback(this, event);
}
}
void wxSocketImplUnix::DisableEvent(wxSocketNotify event)
{
if (m_use_events)
{
m_detected |= (1 << event);
wxSocketManager::Get()->Uninstall_Callback(this, event);
}
}
int wxSocketImplUnix::Recv_Stream(void *buffer, int size)
{
int ret;
do
{
ret = recv(m_fd, buffer, size, GSOCKET_MSG_NOSIGNAL);
}
while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
return ret;
}
int wxSocketImplUnix::Recv_Dgram(void *buffer, int size)
{
wxSockAddr from;
WX_SOCKLEN_T fromlen = sizeof(from);
int ret;
wxSocketError err;
fromlen = sizeof(from);
do
{
ret = recvfrom(m_fd, buffer, size, 0, (sockaddr*)&from, (WX_SOCKLEN_T *) &fromlen);
}
while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
if (ret == -1)
return -1;
/* Translate a system address into a wxSocketImplUnix address */
if (!m_peer)
{
m_peer = GAddress_new();
if (!m_peer)
{
m_error = wxSOCKET_MEMERR;
return -1;
}
}
err = _GAddress_translate_from(m_peer, (sockaddr*)&from, fromlen);
if (err != wxSOCKET_NOERROR)
{
GAddress_destroy(m_peer);
m_peer = NULL;
m_error = err;
return -1;
}
return ret;
}
int wxSocketImplUnix::Send_Stream(const void *buffer, int size)
{
int ret;
MASK_SIGNAL();
do
{
ret = send(m_fd, buffer, size, GSOCKET_MSG_NOSIGNAL);
}
while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
UNMASK_SIGNAL();
return ret;
}
int wxSocketImplUnix::Send_Dgram(const void *buffer, int size)
{
struct sockaddr *addr;
int len, ret;
wxSocketError err;
if (!m_peer)
{
m_error = wxSOCKET_INVADDR;
return -1;
}
err = _GAddress_translate_to(m_peer, &addr, &len);
if (err != wxSOCKET_NOERROR)
{
m_error = err;
return -1;
}
MASK_SIGNAL();
do
{
ret = sendto(m_fd, buffer, size, 0, addr, len);
}
while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
UNMASK_SIGNAL();
/* Frees memory allocated from _GAddress_translate_to */
free(addr);
return ret;
}
void wxSocketImplUnix::OnStateChange(wxSocketNotify event)
{
DisableEvent(event);
NotifyOnStateChange(event);
if ( event == wxSOCKET_LOST )
Shutdown();
}
void wxSocketImplUnix::OnReadWaiting()
{
char c;
if (m_fd == INVALID_SOCKET)
{
return;
}
/* If we have already detected a LOST event, then don't try
* to do any further processing.
*/
if ((m_detected & wxSOCKET_LOST_FLAG) != 0)
{
m_establishing = false;
OnStateChange(wxSOCKET_LOST);
return;
}
int num = recv(m_fd, &c, 1, MSG_PEEK | GSOCKET_MSG_NOSIGNAL);
if (num > 0)
{
OnStateChange(wxSOCKET_INPUT);
}
else
{
if (m_server && m_stream)
{
OnStateChange(wxSOCKET_CONNECTION);
}
else if (num == 0)
{
if (m_stream)
{
/* graceful shutdown */
OnStateChange(wxSOCKET_LOST);
}
else
{
/* Empty datagram received */
OnStateChange(wxSOCKET_INPUT);
}
}
else
{
/* Do not throw a lost event in cases where the socket isn't really lost */
if ((errno == EWOULDBLOCK) || (errno == EAGAIN) || (errno == EINTR))
{
OnStateChange(wxSOCKET_INPUT);
}
else
{
OnStateChange(wxSOCKET_LOST);
}
}
}
}
void wxSocketImplUnix::OnWriteWaiting()
{
/* If we have already detected a LOST event, then don't try
* to do any further processing.
*/
if ((m_detected & wxSOCKET_LOST_FLAG) != 0)
{
m_establishing = false;
OnStateChange(wxSOCKET_LOST);
return;
}
if (m_establishing && !m_server)
{
int error;
SOCKOPTLEN_T len = sizeof(error);
m_establishing = false;
getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
if (error)
{
OnStateChange(wxSOCKET_LOST);
}
else
{
OnStateChange(wxSOCKET_CONNECTION);
/* We have to fire this event by hand because CONNECTION (for clients)
* and OUTPUT are internally the same and we just disabled CONNECTION
* events with the above macro.
*/
OnStateChange(wxSOCKET_OUTPUT);
}
}
else
{
OnStateChange(wxSOCKET_OUTPUT);
}
}
void wxSocketImplUnix::OnExceptionWaiting()
{
wxFAIL_MSG( "not supposed to be called" );
}
/*
* -------------------------------------------------------------------------
* GAddress
* -------------------------------------------------------------------------
*/
/* CHECK_ADDRESS verifies that the current address family is either
* wxSOCKET_NOFAMILY or wxSOCKET_*family*, and if it is wxSOCKET_NOFAMILY, it
* initalizes it to be a wxSOCKET_*family*. In other cases, it returns
* an appropiate error code.
*
* CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
*/
#define CHECK_ADDRESS(address, family) \
{ \
if (address->m_family == wxSOCKET_NOFAMILY) \
if (_GAddress_Init_##family(address) != wxSOCKET_NOERROR) \
return address->m_error; \
if (address->m_family != wxSOCKET_##family) \
{ \
address->m_error = wxSOCKET_INVADDR; \
return wxSOCKET_INVADDR; \
} \
}
#define CHECK_ADDRESS_RETVAL(address, family, retval) \
{ \
if (address->m_family == wxSOCKET_NOFAMILY) \
if (_GAddress_Init_##family(address) != wxSOCKET_NOERROR) \
return retval; \
if (address->m_family != wxSOCKET_##family) \
{ \
address->m_error = wxSOCKET_INVADDR; \
return retval; \
} \
}
GAddress *GAddress_new(void)
{
GAddress *address;
if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
return NULL;
address->m_family = wxSOCKET_NOFAMILY;
address->m_addr = NULL;
address->m_len = 0;
return address;
}
GAddress *GAddress_copy(GAddress *address)
{
GAddress *addr2;
assert(address != NULL);
if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
return NULL;
memcpy(addr2, address, sizeof(GAddress));
if (address->m_addr && address->m_len > 0)
{
addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
if (addr2->m_addr == NULL)
{
free(addr2);
return NULL;
}
memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
}
return addr2;
}
void GAddress_destroy(GAddress *address)
{
assert(address != NULL);
if (address->m_addr)
free(address->m_addr);
free(address);
}
void GAddress_SetFamily(GAddress *address, GAddressType type)
{
assert(address != NULL);
address->m_family = type;
}
GAddressType GAddress_GetFamily(GAddress *address)
{
assert(address != NULL);
return address->m_family;
}
wxSocketError _GAddress_translate_from(GAddress *address,
struct sockaddr *addr, int len)
{
address->m_realfamily = addr->sa_family;
switch (addr->sa_family)
{
case AF_INET:
address->m_family = wxSOCKET_INET;
break;
case AF_UNIX:
address->m_family = wxSOCKET_UNIX;
break;
#if wxUSE_IPV6
case AF_INET6:
address->m_family = wxSOCKET_INET6;
break;
#endif // wxUSE_IPV6
default:
{
address->m_error = wxSOCKET_INVOP;
return wxSOCKET_INVOP;
}
}
if (address->m_addr)
free(address->m_addr);
address->m_len = len;
address->m_addr = (struct sockaddr *)malloc(len);
if (address->m_addr == NULL)
{
address->m_error = wxSOCKET_MEMERR;
return wxSOCKET_MEMERR;
}
memcpy(address->m_addr, addr, len);
return wxSOCKET_NOERROR;
}
wxSocketError _GAddress_translate_to(GAddress *address,
struct sockaddr **addr, int *len)
{
if (!address->m_addr)
{
address->m_error = wxSOCKET_INVADDR;
return wxSOCKET_INVADDR;
}
*len = address->m_len;
*addr = (struct sockaddr *)malloc(address->m_len);
if (*addr == NULL)
{
address->m_error = wxSOCKET_MEMERR;
return wxSOCKET_MEMERR;
}
memcpy(*addr, address->m_addr, address->m_len);
return wxSOCKET_NOERROR;
}
/*
* -------------------------------------------------------------------------
* Internet address family
* -------------------------------------------------------------------------
*/
wxSocketError _GAddress_Init_INET(GAddress *address)
{
address->m_len = sizeof(struct sockaddr_in);
address->m_addr = (struct sockaddr *) malloc(address->m_len);
if (address->m_addr == NULL)
{
address->m_error = wxSOCKET_MEMERR;
return wxSOCKET_MEMERR;
}
address->m_family = wxSOCKET_INET;
address->m_realfamily = PF_INET;
((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
{
struct hostent *he;
struct in_addr *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
/* If it is a numeric host name, convert it now */
#if defined(HAVE_INET_ATON)
if (inet_aton(hostname, addr) == 0)
{
#elif defined(HAVE_INET_ADDR)
if ( (addr->s_addr = inet_addr(hostname)) == (unsigned)-1 )
{
#else
/* Use gethostbyname by default */
#ifndef __WXMAC__
int val = 1; /* VA doesn't like constants in conditional expressions */
if (val)
#endif
{
#endif
struct in_addr *array_addr;
/* It is a real name, we solve it */
struct hostent h;
#if defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
struct hostent_data buffer;
#else
char buffer[1024];
#endif
int err;
he = wxGethostbyname_r(hostname, &h, (void*)&buffer, sizeof(buffer), &err);
if (he == NULL)
{
/* Reset to invalid address */
addr->s_addr = INADDR_NONE;
address->m_error = wxSOCKET_NOHOST;
return wxSOCKET_NOHOST;
}
array_addr = (struct in_addr *) *(he->h_addr_list);
addr->s_addr = array_addr[0].s_addr;
}
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET_SetBroadcastAddress(GAddress *address)
{
return GAddress_INET_SetHostAddress(address, INADDR_BROADCAST);
}
wxSocketError GAddress_INET_SetAnyAddress(GAddress *address)
{
return GAddress_INET_SetHostAddress(address, INADDR_ANY);
}
wxSocketError GAddress_INET_SetHostAddress(GAddress *address,
unsigned long hostaddr)
{
struct in_addr *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
addr->s_addr = htonl(hostaddr);
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
const char *protocol)
{
struct servent *se;
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
if (!port)
{
address->m_error = wxSOCKET_INVPORT;
return wxSOCKET_INVPORT;
}
#if defined(HAVE_FUNC_GETSERVBYNAME_R_4)
struct servent_data buffer;
#else
char buffer[1024];
#endif
struct servent serv;
se = wxGetservbyname_r(port, protocol, &serv,
(void*)&buffer, sizeof(buffer));
if (!se)
{
/* the cast to int suppresses compiler warnings about subscript having the
type char */
if (isdigit((int)port[0]))
{
int port_int;
port_int = atoi(port);
addr = (struct sockaddr_in *)address->m_addr;
addr->sin_port = htons(port_int);
return wxSOCKET_NOERROR;
}
address->m_error = wxSOCKET_INVPORT;
return wxSOCKET_INVPORT;
}
addr = (struct sockaddr_in *)address->m_addr;
addr->sin_port = se->s_port;
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
{
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
addr = (struct sockaddr_in *)address->m_addr;
addr->sin_port = htons(port);
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
{
struct hostent *he;
char *addr_buf;
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
addr = (struct sockaddr_in *)address->m_addr;
addr_buf = (char *)&(addr->sin_addr);
struct hostent temphost;
#if defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
struct hostent_data buffer;
#else
char buffer[1024];
#endif
int err;
he = wxGethostbyaddr_r(addr_buf, sizeof(addr->sin_addr), AF_INET, &temphost,
(void*)&buffer, sizeof(buffer), &err);
if (he == NULL)
{
address->m_error = wxSOCKET_NOHOST;
return wxSOCKET_NOHOST;
}
strncpy(hostname, he->h_name, sbuf);
return wxSOCKET_NOERROR;
}
unsigned long GAddress_INET_GetHostAddress(GAddress *address)
{
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS_RETVAL(address, INET, 0);
addr = (struct sockaddr_in *)address->m_addr;
return ntohl(addr->sin_addr.s_addr);
}
unsigned short GAddress_INET_GetPort(GAddress *address)
{
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS_RETVAL(address, INET, 0);
addr = (struct sockaddr_in *)address->m_addr;
return ntohs(addr->sin_port);
}
#if wxUSE_IPV6
/*
* -------------------------------------------------------------------------
* Internet IPv6 address family
* -------------------------------------------------------------------------
*/
wxSocketError _GAddress_Init_INET6(GAddress *address)
{
struct in6_addr any_address = IN6ADDR_ANY_INIT;
address->m_len = sizeof(struct sockaddr_in6);
address->m_addr = (struct sockaddr *) malloc(address->m_len);
if (address->m_addr == NULL)
{
address->m_error = wxSOCKET_MEMERR;
return wxSOCKET_MEMERR;
}
memset(address->m_addr,0,address->m_len);
address->m_family = wxSOCKET_INET6;
address->m_realfamily = AF_INET6;
((struct sockaddr_in6 *)address->m_addr)->sin6_family = AF_INET6;
((struct sockaddr_in6 *)address->m_addr)->sin6_addr = any_address;
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET6_SetHostName(GAddress *address, const char *hostname)
{
assert(address != NULL);
CHECK_ADDRESS(address, INET6);
addrinfo hints;
memset( & hints, 0, sizeof( hints ) );
hints.ai_family = AF_INET6;
addrinfo * info = 0;
if ( getaddrinfo( hostname, "0", & hints, & info ) || ! info )
{
address->m_error = wxSOCKET_NOHOST;
return wxSOCKET_NOHOST;
}
memcpy( address->m_addr, info->ai_addr, info->ai_addrlen );
freeaddrinfo( info );
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET6_SetAnyAddress(GAddress *address)
{
assert(address != NULL);
CHECK_ADDRESS(address, INET6);
struct in6_addr addr;
memset( & addr, 0, sizeof( addr ) );
return GAddress_INET6_SetHostAddress(address, addr);
}
wxSocketError GAddress_INET6_SetHostAddress(GAddress *address,
struct in6_addr hostaddr)
{
assert(address != NULL);
CHECK_ADDRESS(address, INET6);
((struct sockaddr_in6 *)address->m_addr)->sin6_addr = hostaddr;
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET6_SetPortName(GAddress *address, const char *port,
const char *protocol)
{
struct servent *se;
struct sockaddr_in6 *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET6);
if (!port)
{
address->m_error = wxSOCKET_INVPORT;
return wxSOCKET_INVPORT;
}
se = getservbyname(port, protocol);
if (!se)
{
if (isdigit(port[0]))
{
int port_int;
port_int = atoi(port);
addr = (struct sockaddr_in6 *)address->m_addr;
addr->sin6_port = htons((u_short) port_int);
return wxSOCKET_NOERROR;
}
address->m_error = wxSOCKET_INVPORT;
return wxSOCKET_INVPORT;
}
addr = (struct sockaddr_in6 *)address->m_addr;
addr->sin6_port = se->s_port;
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET6_SetPort(GAddress *address, unsigned short port)
{
struct sockaddr_in6 *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET6);
addr = (struct sockaddr_in6 *)address->m_addr;
addr->sin6_port = htons(port);
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET6_GetHostName(GAddress *address, char *hostname, size_t sbuf)
{
struct hostent *he;
char *addr_buf;
struct sockaddr_in6 *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET6);
addr = (struct sockaddr_in6 *)address->m_addr;
addr_buf = (char *)&(addr->sin6_addr);
he = gethostbyaddr(addr_buf, sizeof(addr->sin6_addr), AF_INET6);
if (he == NULL)
{
address->m_error = wxSOCKET_NOHOST;
return wxSOCKET_NOHOST;
}
strncpy(hostname, he->h_name, sbuf);
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_INET6_GetHostAddress(GAddress *address,struct in6_addr *hostaddr)
{
assert(address != NULL);
assert(hostaddr != NULL);
CHECK_ADDRESS_RETVAL(address, INET6, wxSOCKET_INVADDR);
*hostaddr = ( (struct sockaddr_in6 *)address->m_addr )->sin6_addr;
return wxSOCKET_NOERROR;
}
unsigned short GAddress_INET6_GetPort(GAddress *address)
{
assert(address != NULL);
CHECK_ADDRESS_RETVAL(address, INET6, 0);
return ntohs( ((struct sockaddr_in6 *)address->m_addr)->sin6_port );
}
#endif // wxUSE_IPV6
/*
* -------------------------------------------------------------------------
* Unix address family
* -------------------------------------------------------------------------
*/
#ifndef __VISAGECPP__
wxSocketError _GAddress_Init_UNIX(GAddress *address)
{
address->m_len = sizeof(struct sockaddr_un);
address->m_addr = (struct sockaddr *)malloc(address->m_len);
if (address->m_addr == NULL)
{
address->m_error = wxSOCKET_MEMERR;
return wxSOCKET_MEMERR;
}
address->m_family = wxSOCKET_UNIX;
address->m_realfamily = PF_UNIX;
((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
return wxSOCKET_NOERROR;
}
#define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
wxSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
{
struct sockaddr_un *addr;
assert(address != NULL);
CHECK_ADDRESS(address, UNIX);
addr = ((struct sockaddr_un *)address->m_addr);
strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
return wxSOCKET_NOERROR;
}
wxSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
{
struct sockaddr_un *addr;
assert(address != NULL);
CHECK_ADDRESS(address, UNIX);
addr = (struct sockaddr_un *)address->m_addr;
strncpy(path, addr->sun_path, sbuf);
return wxSOCKET_NOERROR;
}
#endif /* !defined(__VISAGECPP__) */
#endif /* wxUSE_SOCKETS */
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