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4010aae119296f675b2bd48c38f795712ce41bec
wxWidgets/src/unix/gsocket.cpp

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/* -------------------------------------------------------------------------
* Project: GSocket (Generic Socket) for WX
* Name: gsocket.c
* Copyright: (c) Guilhem Lavaux
* Licence: wxWindows Licence
* Authors: David Elliott (C++ conversion, maintainer)
* Guilhem Lavaux,
* Guillermo Rodriguez Garcia <guille@iies.es>
* Purpose: GSocket main Unix and OS/2 file
* Licence: The wxWindows licence
* CVSID: $Id$
* -------------------------------------------------------------------------
*/
#if defined(__WATCOMC__)
#include "wx/wxprec.h"
#include <errno.h>
#include <nerrno.h>
#endif
#ifndef __GSOCKET_STANDALONE__
#include "wx/defs.h"
#include "wx/private/gsocketiohandler.h"
#endif
#if defined(__VISAGECPP__)
#define BSD_SELECT /* use Berkeley Sockets select */
#endif
#if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
#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
/*
* MSW defines this, Unices don't.
*/
#ifndef INVALID_SOCKET
#define INVALID_SOCKET -1
#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 */
#ifndef __GSOCKET_STANDALONE__
# include "wx/unix/gsockunx.h"
# include "wx/unix/private.h"
# include "wx/gsocket.h"
#if wxUSE_THREADS && (defined(HAVE_GETHOSTBYNAME) || defined(HAVE_GETSERVBYNAME))
# include "wx/thread.h"
#endif
#else
# include "gsockunx.h"
# include "gsocket.h"
# ifndef WXUNUSED
# define WXUNUSED(x)
# endif
#endif /* __GSOCKET_STANDALONE__ */
#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 GSocket_Debug(args) printf args
#else
# define GSocket_Debug(args)
#endif /* __GSOCKET_DEBUG__ */
#if wxUSE_IPV6
typedef struct sockaddr_storage wxSockAddr;
#else
typedef struct sockaddr wxSockAddr;
#endif
/* Table of GUI-related functions. We must call them indirectly because
* of wxBase and GUI separation: */
bool GSocket_Init()
{
GSocketManager * const manager = GSocketManager::Get();
return manager && manager->OnInit();
}
void GSocket_Cleanup()
{
GSocketManager * const manager = GSocketManager::Get();
if ( manager )
manager->OnExit();
}
/* Constructors / Destructors for GSocket */
GSocket::GSocket()
{
int i;
m_fd = INVALID_SOCKET;
m_handler = NULL;
for (i=0;i<GSOCK_MAX_EVENT;i++)
{
m_cbacks[i] = NULL;
}
m_detected = 0;
m_local = NULL;
m_peer = NULL;
m_error = GSOCK_NOERROR;
m_server = false;
m_stream = true;
m_gui_dependent = NULL;
m_non_blocking = false;
m_reusable = false;
m_broadcast = false;
m_dobind = true;
m_timeout = 10*60*1000;
/* 10 minutes * 60 sec * 1000 millisec */
m_establishing = false;
m_use_events = false;
m_initialRecvBufferSize = -1;
m_initialSendBufferSize = -1;
m_ok = GSocketManager::Get()->Init_Socket(this);
}
void GSocket::Close()
{
if (m_use_events)
DisableEvents();
/* When running on OS X, the gsockosx implementation of GSocketGUIFunctionsTable
will close the socket during Disable_Events. However, it will only do this
if it is being used. That is, it won't do it in a console program. To
ensure we get the right behavior, we have gsockosx set m_fd = INVALID_SOCKET
if it has closed the socket which indicates to us (at runtime, instead of
at compile time as this had been before) that the socket has already
been closed.
*/
if(m_fd != INVALID_SOCKET)
close(m_fd);
m_fd = INVALID_SOCKET;
}
GSocket::~GSocket()
{
assert(this);
/* Check that the socket is really shutdowned */
if (m_fd != INVALID_SOCKET)
Shutdown();
GSocketManager::Get()->Destroy_Socket(this);
delete m_handler;
/* Destroy private addresses */
if (m_local)
GAddress_destroy(m_local);
if (m_peer)
GAddress_destroy(m_peer);
}
/* GSocket_Shutdown:
* Disallow further read/write operations on this socket, close
* the fd and disable all callbacks.
*/
void GSocket::Shutdown()
{
int evt;
assert(this);
/* Don't allow events to fire after socket has been closed */
if (m_use_events)
DisableEvents();
/* If socket has been created, shutdown it */
if (m_fd != INVALID_SOCKET)
{
shutdown(m_fd, 1);
Close();
}
/* Disable GUI callbacks */
for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
m_cbacks[evt] = NULL;
m_detected = GSOCK_LOST_FLAG;
}
/* Address handling */
/* GSocket_SetLocal:
* GSocket_GetLocal:
* GSocket_SetPeer:
* GSocket_GetPeer:
* Set or get the local or peer address for this socket. The 'set'
* functions return GSOCK_NOERROR on success, an error code otherwise.
* The 'get' functions return a pointer to a GAddress object on success,
* or NULL otherwise, in which case they set the error code of the
* corresponding GSocket.
*
* Error codes:
* GSOCK_INVSOCK - the socket is not valid.
* GSOCK_INVADDR - the address is not valid.
*/
GSocketError GSocket::SetLocal(GAddress *address)
{
assert(this);
/* the socket must be initialized, or it must be a server */
if ((m_fd != INVALID_SOCKET && !m_server))
{
m_error = GSOCK_INVSOCK;
return GSOCK_INVSOCK;
}
/* check address */
if (address == NULL || address->m_family == GSOCK_NOFAMILY)
{
m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
if (m_local)
GAddress_destroy(m_local);
m_local = GAddress_copy(address);
return GSOCK_NOERROR;
}
GSocketError GSocket::SetPeer(GAddress *address)
{
assert(this);
/* check address */
if (address == NULL || address->m_family == GSOCK_NOFAMILY)
{
m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
if (m_peer)
GAddress_destroy(m_peer);
m_peer = GAddress_copy(address);
return GSOCK_NOERROR;
}
GAddress *GSocket::GetLocal()
{
GAddress *address;
wxSockAddr addr;
WX_SOCKLEN_T size = sizeof(addr);
GSocketError err;
assert(this);
/* try to get it from the m_local var first */
if (m_local)
return GAddress_copy(m_local);
/* else, if the socket is initialized, try getsockname */
if (m_fd == INVALID_SOCKET)
{
m_error = GSOCK_INVSOCK;
return NULL;
}
if (getsockname(m_fd, (sockaddr*)&addr, (WX_SOCKLEN_T *) &size) < 0)
{
m_error = GSOCK_IOERR;
return NULL;
}
/* got a valid address from getsockname, create a GAddress object */
address = GAddress_new();
if (address == NULL)
{
m_error = GSOCK_MEMERR;
return NULL;
}
err = _GAddress_translate_from(address, (sockaddr*)&addr, size);
if (err != GSOCK_NOERROR)
{
GAddress_destroy(address);
m_error = err;
return NULL;
}
return address;
}
GAddress *GSocket::GetPeer()
{
assert(this);
/* try to get it from the m_peer var */
if (m_peer)
return GAddress_copy(m_peer);
return NULL;
}
/* Server specific parts */
/* GSocket_SetServer:
* Sets up this socket as a server. The local address must have been
* set with GSocket_SetLocal() before GSocket_SetServer() is called.
* Returns GSOCK_NOERROR on success, one of the following otherwise:
*
* Error codes:
* GSOCK_INVSOCK - the socket is in use.
* GSOCK_INVADDR - the local address has not been set.
* GSOCK_IOERR - low-level error.
*/
GSocketError GSocket::SetServer()
{
int arg = 1;
assert(this);
/* must not be in use */
if (m_fd != INVALID_SOCKET)
{
m_error = GSOCK_INVSOCK;
return GSOCK_INVSOCK;
}
/* the local addr must have been set */
if (!m_local)
{
m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
/* Initialize all fields */
m_stream = true;
m_server = true;
/* Create the socket */
m_fd = socket(m_local->m_realfamily, SOCK_STREAM, 0);
if (m_fd == INVALID_SOCKET)
{
m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
/* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
#ifdef SO_NOSIGPIPE
setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(arg));
#endif
ioctl(m_fd, FIONBIO, &arg);
if (m_use_events)
EnableEvents();
/* allow a socket to re-bind if the socket is in the TIME_WAIT
state after being previously closed.
*/
if (m_reusable)
{
setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(arg));
#ifdef SO_REUSEPORT
setsockopt(m_fd, SOL_SOCKET, SO_REUSEPORT, (const char*)&arg, sizeof(arg));
#endif
}
/* Bind to the local address,
* retrieve the actual address bound,
* and listen up to 5 connections.
*/
if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
(getsockname(m_fd,
m_local->m_addr,
(WX_SOCKLEN_T *) &m_local->m_len) != 0) ||
(listen(m_fd, 5) != 0))
{
Close();
m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
return GSOCK_NOERROR;
}
/* GSocket_WaitConnection:
* Waits for an incoming client connection. Returns a pointer to
* a GSocket object, or NULL if there was an error, in which case
* the last error field will be updated for the calling GSocket.
*
* Error codes (set in the calling GSocket)
* GSOCK_INVSOCK - the socket is not valid or not a server.
* GSOCK_TIMEDOUT - timeout, no incoming connections.
* GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
* GSOCK_MEMERR - couldn't allocate memory.
* GSOCK_IOERR - low-level error.
*/
GSocket *GSocket::WaitConnection()
{
wxSockAddr from;
WX_SOCKLEN_T fromlen = sizeof(from);
GSocket *connection;
GSocketError err;
int arg = 1;
assert(this);
/* If the socket has already been created, we exit immediately */
if (m_fd == INVALID_SOCKET || !m_server)
{
m_error = GSOCK_INVSOCK;
return NULL;
}
/* Create a GSocket object for the new connection */
connection = GSocket_new();
if (!connection)
{
m_error = GSOCK_MEMERR;
return NULL;
}
/* Wait for a connection (with timeout) */
if (Input_Timeout() == GSOCK_TIMEDOUT)
{
delete connection;
/* m_error set by _GSocket_Input_Timeout */
return NULL;
}
connection->m_fd = accept(m_fd, (sockaddr*)&from, (WX_SOCKLEN_T *) &fromlen);
/* Reenable CONNECTION events */
Enable(GSOCK_CONNECTION);
if (connection->m_fd == INVALID_SOCKET)
{
if (errno == EWOULDBLOCK)
m_error = GSOCK_WOULDBLOCK;
else
m_error = GSOCK_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 = GSOCK_MEMERR;
return NULL;
}
err = _GAddress_translate_from(connection->m_peer, (sockaddr*)&from, fromlen);
if (err != GSOCK_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 GSocket::Notify(bool flag)
{
if (flag == m_use_events)
return;
m_use_events = flag;
EnableEvents(flag);
}
void GSocket::EnableEvents(bool flag)
{
if (flag)
GSocketManager::Get()->Enable_Events(this);
else
GSocketManager::Get()->Disable_Events(this);
}
bool GSocket::SetReusable()
{
/* socket must not be null, and must not be in use/already bound */
if (this && m_fd == INVALID_SOCKET)
{
m_reusable = true;
return true;
}
return false;
}
bool GSocket::SetBroadcast()
{
/* socket must not be in use/already bound */
if (m_fd == INVALID_SOCKET) {
m_broadcast = true;
return true;
}
return false;
}
bool GSocket::DontDoBind()
{
/* socket must not be in use/already bound */
if (m_fd == INVALID_SOCKET) {
m_dobind = false;
return true;
}
return false;
}
/* Client specific parts */
/* GSocket_Connect:
* For stream (connection oriented) sockets, GSocket_Connect() tries
* to establish a client connection to a server using the peer address
* as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
* connection has been successfully established, or one of the error
* codes listed below. Note that for nonblocking sockets, a return
* value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
* request can be completed later; you should use GSocket_Select()
* to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
* corresponding asynchronous events.
*
* For datagram (non connection oriented) sockets, GSocket_Connect()
* just sets the peer address established with GSocket_SetPeer() as
* default destination.
*
* Error codes:
* GSOCK_INVSOCK - the socket is in use or not valid.
* GSOCK_INVADDR - the peer address has not been established.
* GSOCK_TIMEDOUT - timeout, the connection failed.
* GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
* GSOCK_MEMERR - couldn't allocate memory.
* GSOCK_IOERR - low-level error.
*/
GSocketError GSocket::Connect(GSocketStream stream)
{
int err, ret;
int arg = 1;
assert(this);
/* Enable CONNECTION events (needed for nonblocking connections) */
Enable(GSOCK_CONNECTION);
if (m_fd != INVALID_SOCKET)
{
m_error = GSOCK_INVSOCK;
return GSOCK_INVSOCK;
}
if (!m_peer)
{
m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
/* Streamed or dgram socket? */
m_stream = (stream == GSOCK_STREAMED);
m_server = false;
m_establishing = false;
/* Create the socket */
m_fd = socket(m_peer->m_realfamily,
m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
if (m_fd == INVALID_SOCKET)
{
m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
/* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
#ifdef SO_NOSIGPIPE
setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(arg));
#endif
#if defined(__EMX__) || defined(__VISAGECPP__)
ioctl(m_fd, FIONBIO, (char*)&arg, sizeof(arg));
#else
ioctl(m_fd, FIONBIO, &arg);
#endif
// If the reuse flag is set, use the applicable socket reuse flags(s)
if (m_reusable)
{
setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(arg));
#ifdef SO_REUSEPORT
setsockopt(m_fd, SOL_SOCKET, SO_REUSEPORT, (const char*)&arg, sizeof(arg));
#endif
}
if (m_initialRecvBufferSize >= 0)
setsockopt(m_fd, SOL_SOCKET, SO_RCVBUF, (const char*)&m_initialRecvBufferSize, sizeof(m_initialRecvBufferSize));
if (m_initialSendBufferSize >= 0)
setsockopt(m_fd, SOL_SOCKET, SO_SNDBUF, (const char*)&m_initialSendBufferSize, sizeof(m_initialSendBufferSize));
// If a local address has been set, then we need to bind to it before calling connect
if (m_local && m_local->m_addr)
{
bind(m_fd, m_local->m_addr, m_local->m_len);
}
/* Connect it to the peer address, with a timeout (see below) */
ret = connect(m_fd, m_peer->m_addr, m_peer->m_len);
/* We only call Enable_Events if we know we aren't shutting down the socket.
* NB: Enable_Events 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 Enable_Events now.
*/
if (m_use_events && (m_non_blocking || ret == 0))
EnableEvents();
if (ret == -1)
{
err = errno;
/* If connect failed with EINPROGRESS and the GSocket 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 (Output_Timeout() == GSOCK_TIMEDOUT)
{
Close();
/* m_error is set in _GSocket_Output_Timeout */
return GSOCK_TIMEDOUT;
}
else
{
int error;
SOCKOPTLEN_T len = sizeof(error);
getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*) &error, &len);
if (m_use_events)
EnableEvents();
if (!error)
return GSOCK_NOERROR;
}
}
/* If connect failed with EINPROGRESS and the GSocket object
* is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
* (and return GSOCK_WOULDBLOCK) but we don't close the socket;
* this way if the connection completes, a GSOCK_CONNECTION
* event will be generated, if enabled.
*/
if ((err == EINPROGRESS) && (m_non_blocking))
{
m_establishing = true;
m_error = GSOCK_WOULDBLOCK;
return GSOCK_WOULDBLOCK;
}
/* If connect failed with an error other than EINPROGRESS,
* then the call to GSocket_Connect has failed.
*/
Close();
m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
return GSOCK_NOERROR;
}
/* Datagram sockets */
/* GSocket_SetNonOriented:
* Sets up this socket as a non-connection oriented (datagram) socket.
* Before using this function, the local address must have been set
* with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
* on success, or one of the following otherwise.
*
* Error codes:
* GSOCK_INVSOCK - the socket is in use.
* GSOCK_INVADDR - the local address has not been set.
* GSOCK_IOERR - low-level error.
*/
GSocketError GSocket::SetNonOriented()
{
int arg = 1;
assert(this);
if (m_fd != INVALID_SOCKET)
{
m_error = GSOCK_INVSOCK;
return GSOCK_INVSOCK;
}
if (!m_local)
{
m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
/* Initialize all fields */
m_stream = false;
m_server = false;
/* Create the socket */
m_fd = socket(m_local->m_realfamily, SOCK_DGRAM, 0);
if (m_fd == INVALID_SOCKET)
{
m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
#if defined(__EMX__) || defined(__VISAGECPP__)
ioctl(m_fd, FIONBIO, (char*)&arg, sizeof(arg));
#else
ioctl(m_fd, FIONBIO, &arg);
#endif
if (m_use_events)
EnableEvents();
if (m_reusable)
{
setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(arg));
#ifdef SO_REUSEPORT
setsockopt(m_fd, SOL_SOCKET, SO_REUSEPORT, (const char*)&arg, sizeof(arg));
#endif
}
if (m_broadcast)
{
setsockopt(m_fd, SOL_SOCKET, SO_BROADCAST, (const char*)&arg, sizeof(arg));
}
if (m_dobind)
{
/* Bind to the local address,
* and retrieve the actual address bound.
*/
if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
(getsockname(m_fd,
m_local->m_addr,
(WX_SOCKLEN_T *) &m_local->m_len) != 0))
{
Close();
m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
}
return GSOCK_NOERROR;
}
/* Generic IO */
/* Like recv(), send(), ... */
int GSocket::Read(char *buffer, int size)
{
int ret;
assert(this);
if (m_fd == INVALID_SOCKET || m_server)
{
m_error = GSOCK_INVSOCK;
return -1;
}
/* Disable events during query of socket status */
Disable(GSOCK_INPUT);
/* If the socket is blocking, wait for data (with a timeout) */
if (Input_Timeout() == GSOCK_TIMEDOUT) {
m_error = GSOCK_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 = GSOCK_LOST_FLAG;
Detected_Read();
return 0;
}
}
else if (ret == -1)
{
if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
m_error = GSOCK_WOULDBLOCK;
else
m_error = GSOCK_IOERR;
}
}
/* Enable events again now that we are done processing */
Enable(GSOCK_INPUT);
return ret;
}
int GSocket::Write(const char *buffer, int size)
{
int ret;
assert(this);
GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
if (m_fd == INVALID_SOCKET || m_server)
{
m_error = GSOCK_INVSOCK;
return -1;
}
GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
/* If the socket is blocking, wait for writability (with a timeout) */
if (Output_Timeout() == GSOCK_TIMEDOUT)
return -1;
GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
/* Write the data */
if (m_stream)
ret = Send_Stream(buffer, size);
else
ret = Send_Dgram(buffer, size);
GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
if (ret == -1)
{
if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
{
m_error = GSOCK_WOULDBLOCK;
GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
}
else
{
m_error = GSOCK_IOERR;
GSocket_Debug(( "GSocket_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.
*/
Enable(GSOCK_OUTPUT);
return -1;
}
GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
return ret;
}
/* GSocket_Select:
* Polls the socket to determine its status. This function will
* check for the events specified in the 'flags' parameter, and
* it will return a mask indicating which operations can be
* performed. This function won't block, regardless of the
* mode (blocking | nonblocking) of the socket.
*/
GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
{
assert(this);
GSocketEventFlags result = 0;
fd_set readfds;
fd_set writefds;
fd_set exceptfds;
struct timeval tv;
if (m_fd == -1)
return (GSOCK_LOST_FLAG & flags);
/* Do not use a static struct, Linux can garble it */
tv.tv_sec = 0;
tv.tv_usec = 0;
wxFD_ZERO(&readfds);
wxFD_ZERO(&writefds);
wxFD_ZERO(&exceptfds);
wxFD_SET(m_fd, &readfds);
if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
wxFD_SET(m_fd, &writefds);
wxFD_SET(m_fd, &exceptfds);
/* Check 'sticky' CONNECTION flag first */
result |= GSOCK_CONNECTION_FLAG & m_detected;
/* If we have already detected a LOST event, then don't try
* to do any further processing.
*/
if ((m_detected & GSOCK_LOST_FLAG) != 0)
{
m_establishing = false;
return (GSOCK_LOST_FLAG & flags);
}
/* Try select now */
if (select(m_fd + 1, &readfds, &writefds, &exceptfds, &tv) < 0)
{
/* What to do here? */
return (result & flags);
}
/* Check for exceptions and errors */
if (wxFD_ISSET(m_fd, &exceptfds))
{
m_establishing = false;
m_detected = GSOCK_LOST_FLAG;
/* LOST event: Abort any further processing */
return (GSOCK_LOST_FLAG & flags);
}
/* Check for readability */
if (wxFD_ISSET(m_fd, &readfds))
{
result |= GSOCK_INPUT_FLAG;
if (m_server && m_stream)
{
/* This is a TCP server socket that detected a connection.
While the INPUT_FLAG is also set, it doesn't matter on
this kind of sockets, as we can only Accept() from them. */
m_detected |= GSOCK_CONNECTION_FLAG;
}
}
/* Check for writability */
if (wxFD_ISSET(m_fd, &writefds))
{
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)
{
m_detected = GSOCK_LOST_FLAG;
/* LOST event: Abort any further processing */
return (GSOCK_LOST_FLAG & flags);
}
else
{
m_detected |= GSOCK_CONNECTION_FLAG;
}
}
else
{
result |= GSOCK_OUTPUT_FLAG;
}
}
return (result | m_detected) & flags;
}
/* Flags */
/* GSocket_SetNonBlocking:
* Sets the socket to non-blocking mode. All IO calls will return
* immediately.
*/
void GSocket::SetNonBlocking(bool non_block)
{
assert(this);
GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
m_non_blocking = non_block;
}
/* GSocket_SetTimeout:
* Sets the timeout for blocking calls. Time is expressed in
* milliseconds.
*/
void GSocket::SetTimeout(unsigned long millisec)
{
assert(this);
m_timeout = millisec;
}
/* GSocket_GetError:
* Returns the last error occurred for this socket. Note that successful
* operations do not clear this back to GSOCK_NOERROR, so use it only
* after an error.
*/
GSocketError WXDLLIMPEXP_NET GSocket::GetError()
{
assert(this);
return m_error;
}
/* Callbacks */
/* GSOCK_INPUT:
* There is data to be read in the input buffer. If, after a read
* operation, there is still data available, the callback function will
* be called again.
* GSOCK_OUTPUT:
* The socket is available for writing. That is, the next write call
* won't block. This event is generated only once, when the connection is
* first established, and then only if a call failed with GSOCK_WOULDBLOCK,
* when the output buffer empties again. This means that the app should
* assume that it can write since the first OUTPUT event, and no more
* OUTPUT events will be generated unless an error occurs.
* GSOCK_CONNECTION:
* Connection successfully established, for client sockets, or incoming
* client connection, for server sockets. Wait for this event (also watch
* out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
* GSOCK_LOST:
* The connection is lost (or a connection request failed); this could
* be due to a failure, or due to the peer closing it gracefully.
*/
/* GSocket_SetCallback:
* Enables the callbacks specified by 'flags'. Note that 'flags'
* may be a combination of flags OR'ed toghether, so the same
* callback function can be made to accept different events.
* The callback function must have the following prototype:
*
* void function(GSocket *socket, GSocketEvent event, char *cdata)
*/
void GSocket::SetCallback(GSocketEventFlags flags,
GSocketCallback callback, char *cdata)
{
int count;
assert(this);
for (count = 0; count < GSOCK_MAX_EVENT; count++)
{
if ((flags & (1 << count)) != 0)
{
m_cbacks[count] = callback;
m_data[count] = cdata;
}
}
}
/* GSocket_UnsetCallback:
* Disables all callbacks specified by 'flags', which may be a
* combination of flags OR'ed toghether.
*/
void GSocket::UnsetCallback(GSocketEventFlags flags)
{
int count;
assert(this);
for (count = 0; count < GSOCK_MAX_EVENT; count++)
{
if ((flags & (1 << count)) != 0)
{
m_cbacks[count] = NULL;
m_data[count] = NULL;
}
}
}
GSocketError GSocket::GetSockOpt(int level, int optname,
void *optval, int *optlen)
{
if (getsockopt(m_fd, level, optname, (char*)optval, (SOCKOPTLEN_T*)optlen) == 0)
return GSOCK_NOERROR;
return GSOCK_OPTERR;
}
GSocketError GSocket::SetSockOpt(int level, int optname,
const void *optval, int optlen)
{
if (setsockopt(m_fd, level, optname, (const char*)optval, optlen) == 0)
return GSOCK_NOERROR;
return GSOCK_OPTERR;
}
#define CALL_CALLBACK(socket, event) { \
socket->Disable(event); \
if (socket->m_cbacks[event]) \
socket->m_cbacks[event](socket, event, socket->m_data[event]); \
}
void GSocket::Enable(GSocketEvent event)
{
if (m_use_events)
{
m_detected &= ~(1 << event);
GSocketManager::Get()->Install_Callback(this, event);
}
}
void GSocket::Disable(GSocketEvent event)
{
if (m_use_events)
{
m_detected |= (1 << event);
GSocketManager::Get()->Uninstall_Callback(this, event);
}
}
/* _GSocket_Input_Timeout:
* For blocking sockets, wait until data is available or
* until timeout ellapses.
*/
GSocketError GSocket::Input_Timeout()
{
struct timeval tv;
fd_set readfds;
int ret;
/* Linux select() will overwrite the struct on return */
tv.tv_sec = (m_timeout / 1000);
tv.tv_usec = (m_timeout % 1000) * 1000;
if (!m_non_blocking)
{
wxFD_ZERO(&readfds);
wxFD_SET(m_fd, &readfds);
ret = select(m_fd + 1, &readfds, NULL, NULL, &tv);
if (ret == 0)
{
GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
m_error = GSOCK_TIMEDOUT;
return GSOCK_TIMEDOUT;
}
if (ret == -1)
{
GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
m_error = GSOCK_TIMEDOUT;
return GSOCK_TIMEDOUT;
}
}
return GSOCK_NOERROR;
}
/* _GSocket_Output_Timeout:
* For blocking sockets, wait until data can be sent without
* blocking or until timeout ellapses.
*/
GSocketError GSocket::Output_Timeout()
{
struct timeval tv;
fd_set writefds;
int ret;
/* Linux select() will overwrite the struct on return */
tv.tv_sec = (m_timeout / 1000);
tv.tv_usec = (m_timeout % 1000) * 1000;
GSocket_Debug( ("m_non_blocking has: %d\n", (int)m_non_blocking) );
if (!m_non_blocking)
{
wxFD_ZERO(&writefds);
wxFD_SET(m_fd, &writefds);
ret = select(m_fd + 1, NULL, &writefds, NULL, &tv);
if (ret == 0)
{
GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
m_error = GSOCK_TIMEDOUT;
return GSOCK_TIMEDOUT;
}
if (ret == -1)
{
GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
m_error = GSOCK_TIMEDOUT;
return GSOCK_TIMEDOUT;
}
if ( ! wxFD_ISSET(m_fd, &writefds) )
{
GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
}
else
{
GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
}
}
else
{
GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
}
return GSOCK_NOERROR;
}
int GSocket::Recv_Stream(char *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 GSocket::Recv_Dgram(char *buffer, int size)
{
wxSockAddr from;
WX_SOCKLEN_T fromlen = sizeof(from);
int ret;
GSocketError 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 GSocket address */
if (!m_peer)
{
m_peer = GAddress_new();
if (!m_peer)
{
m_error = GSOCK_MEMERR;
return -1;
}
}
err = _GAddress_translate_from(m_peer, (sockaddr*)&from, fromlen);
if (err != GSOCK_NOERROR)
{
GAddress_destroy(m_peer);
m_peer = NULL;
m_error = err;
return -1;
}
return ret;
}
int GSocket::Send_Stream(const char *buffer, int size)
{
int ret;
MASK_SIGNAL();
do
{
ret = send(m_fd, (char *)buffer, size, GSOCKET_MSG_NOSIGNAL);
}
while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
UNMASK_SIGNAL();
return ret;
}
int GSocket::Send_Dgram(const char *buffer, int size)
{
struct sockaddr *addr;
int len, ret;
GSocketError err;
if (!m_peer)
{
m_error = GSOCK_INVADDR;
return -1;
}
err = _GAddress_translate_to(m_peer, &addr, &len);
if (err != GSOCK_NOERROR)
{
m_error = err;
return -1;
}
MASK_SIGNAL();
do
{
ret = sendto(m_fd, (char *)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 GSocket::Detected_Read()
{
char c;
/* Safeguard against straggling call to Detected_Read */
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 & GSOCK_LOST_FLAG) != 0)
{
m_establishing = false;
CALL_CALLBACK(this, GSOCK_LOST);
Shutdown();
return;
}
int num = recv(m_fd, &c, 1, MSG_PEEK | GSOCKET_MSG_NOSIGNAL);
if (num > 0)
{
CALL_CALLBACK(this, GSOCK_INPUT);
}
else
{
if (m_server && m_stream)
{
CALL_CALLBACK(this, GSOCK_CONNECTION);
}
else if (num == 0)
{
if (m_stream)
{
/* graceful shutdown */
CALL_CALLBACK(this, GSOCK_LOST);
Shutdown();
}
else
{
/* Empty datagram received */
CALL_CALLBACK(this, GSOCK_INPUT);
}
}
else
{
/* Do not throw a lost event in cases where the socket isn't really lost */
if ((errno == EWOULDBLOCK) || (errno == EAGAIN) || (errno == EINTR))
{
CALL_CALLBACK(this, GSOCK_INPUT);
}
else
{
CALL_CALLBACK(this, GSOCK_LOST);
Shutdown();
}
}
}
}
void GSocket::Detected_Write()
{
/* If we have already detected a LOST event, then don't try
* to do any further processing.
*/
if ((m_detected & GSOCK_LOST_FLAG) != 0)
{
m_establishing = false;
CALL_CALLBACK(this, GSOCK_LOST);
Shutdown();
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)
{
CALL_CALLBACK(this, GSOCK_LOST);
Shutdown();
}
else
{
CALL_CALLBACK(this, GSOCK_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.
*/
CALL_CALLBACK(this, GSOCK_OUTPUT);
}
}
else
{
CALL_CALLBACK(this, GSOCK_OUTPUT);
}
}
/* Compatibility functions for GSocket */
GSocket *GSocket_new(void)
{
GSocket *newsocket = new GSocket();
if (newsocket->IsOk())
return newsocket;
delete newsocket;
return NULL;
}
/*
* -------------------------------------------------------------------------
* GAddress
* -------------------------------------------------------------------------
*/
/* CHECK_ADDRESS verifies that the current address family is either
* GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
* initalizes it to be a GSOCK_*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 == GSOCK_NOFAMILY) \
if (_GAddress_Init_##family(address) != GSOCK_NOERROR) \
return address->m_error; \
if (address->m_family != GSOCK_##family) \
{ \
address->m_error = GSOCK_INVADDR; \
return GSOCK_INVADDR; \
} \
}
#define CHECK_ADDRESS_RETVAL(address, family, retval) \
{ \
if (address->m_family == GSOCK_NOFAMILY) \
if (_GAddress_Init_##family(address) != GSOCK_NOERROR) \
return retval; \
if (address->m_family != GSOCK_##family) \
{ \
address->m_error = GSOCK_INVADDR; \
return retval; \
} \
}
GAddress *GAddress_new(void)
{
GAddress *address;
if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
return NULL;
address->m_family = GSOCK_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;
}
GSocketError _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 = GSOCK_INET;
break;
case AF_UNIX:
address->m_family = GSOCK_UNIX;
break;
#if wxUSE_IPV6
case AF_INET6:
address->m_family = GSOCK_INET6;
break;
#endif // wxUSE_IPV6
default:
{
address->m_error = GSOCK_INVOP;
return GSOCK_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 = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
memcpy(address->m_addr, addr, len);
return GSOCK_NOERROR;
}
GSocketError _GAddress_translate_to(GAddress *address,
struct sockaddr **addr, int *len)
{
if (!address->m_addr)
{
address->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
*len = address->m_len;
*addr = (struct sockaddr *)malloc(address->m_len);
if (*addr == NULL)
{
address->m_error = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
memcpy(*addr, address->m_addr, address->m_len);
return GSOCK_NOERROR;
}
/*
* -------------------------------------------------------------------------
* Internet address family
* -------------------------------------------------------------------------
*/
GSocketError _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 = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
address->m_family = GSOCK_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 GSOCK_NOERROR;
}
GSocketError 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 = GSOCK_NOHOST;
return GSOCK_NOHOST;
}
array_addr = (struct in_addr *) *(he->h_addr_list);
addr->s_addr = array_addr[0].s_addr;
}
return GSOCK_NOERROR;
}
GSocketError GAddress_INET_SetBroadcastAddress(GAddress *address)
{
return GAddress_INET_SetHostAddress(address, INADDR_BROADCAST);
}
GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
{
return GAddress_INET_SetHostAddress(address, INADDR_ANY);
}
GSocketError 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 GSOCK_NOERROR;
}
GSocketError 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 = GSOCK_INVPORT;
return GSOCK_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 GSOCK_NOERROR;
}
address->m_error = GSOCK_INVPORT;
return GSOCK_INVPORT;
}
addr = (struct sockaddr_in *)address->m_addr;
addr->sin_port = se->s_port;
return GSOCK_NOERROR;
}
GSocketError 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 GSOCK_NOERROR;
}
GSocketError 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 = GSOCK_NOHOST;
return GSOCK_NOHOST;
}
strncpy(hostname, he->h_name, sbuf);
return GSOCK_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
* -------------------------------------------------------------------------
*/
GSocketError _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 = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
memset(address->m_addr,0,address->m_len);
address->m_family = GSOCK_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 GSOCK_NOERROR;
}
GSocketError 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 = GSOCK_NOHOST;
return GSOCK_NOHOST;
}
memcpy( address->m_addr, info->ai_addr, info->ai_addrlen );
freeaddrinfo( info );
return GSOCK_NOERROR;
}
GSocketError 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);
}
GSocketError 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 GSOCK_NOERROR;
}
GSocketError 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 = GSOCK_INVPORT;
return GSOCK_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 GSOCK_NOERROR;
}
address->m_error = GSOCK_INVPORT;
return GSOCK_INVPORT;
}
addr = (struct sockaddr_in6 *)address->m_addr;
addr->sin6_port = se->s_port;
return GSOCK_NOERROR;
}
GSocketError 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 GSOCK_NOERROR;
}
GSocketError 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 = GSOCK_NOHOST;
return GSOCK_NOHOST;
}
strncpy(hostname, he->h_name, sbuf);
return GSOCK_NOERROR;
}
GSocketError GAddress_INET6_GetHostAddress(GAddress *address,struct in6_addr *hostaddr)
{
assert(address != NULL);
assert(hostaddr != NULL);
CHECK_ADDRESS_RETVAL(address, INET6, GSOCK_INVADDR);
*hostaddr = ( (struct sockaddr_in6 *)address->m_addr )->sin6_addr;
return GSOCK_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__
GSocketError _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 = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
address->m_family = GSOCK_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 GSOCK_NOERROR;
}
#define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
GSocketError 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 GSOCK_NOERROR;
}
GSocketError 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 GSOCK_NOERROR;
}
#endif /* !defined(__VISAGECPP__) */
#endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
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