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#include <string>
#include <vector>
#include "zlib.h"
#include "inspircd_config.h"
#include "configreader.h"
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "socket.h"
#include "hashcomp.h"
#include "inspircd.h"
#include "ssl.h"
/* $ModDesc: Provides zlib link support for servers */
/* $LinkerFlags: -lz */
/* $ModDep: ssl.h */
enum izip_status { IZIP_WAITFIRST, IZIP_OPEN, IZIP_CLOSED };
const unsigned int CHUNK = 16384;
/** Represents an ZIP user's extra data
*/
class izip_session : public classbase
{
public:
z_stream c_stream; /* compression stream */
z_stream d_stream; /* decompress stream */
izip_status status;
int fd;
};
class ModuleZLib : public Module
{
izip_session sessions[MAX_DESCRIPTORS];
public:
ModuleZLib(InspIRCd* Me)
: Module::Module(Me)
{
ServerInstance->PublishInterface("InspSocketHook", this);
}
virtual ~ModuleZLib()
{
}
virtual Version GetVersion()
{
return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
}
void Implements(char* List)
{
List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = 1;
List[I_OnRequest] = 1;
}
virtual char* OnRequest(Request* request)
{
ISHRequest* ISR = (ISHRequest*)request;
if (strcmp("IS_NAME", request->GetId()) == 0)
{
return "zip";
}
else if (strcmp("IS_HOOK", request->GetId()) == 0)
{
return ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
}
else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
{
return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
}
else if (strcmp("IS_HSDONE", request->GetId()) == 0)
{
return "OK";
}
else if (strcmp("IS_ATTACH", request->GetId()) == 0)
{
return NULL;
}
return NULL;
}
virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
{
izip_session* session = &sessions[fd];
/* allocate deflate state */
session->fd = fd;
session->status = IZIP_WAITFIRST;
session->c_stream.zalloc = (alloc_func)0;
session->c_stream.zfree = (free_func)0;
session->c_stream.opaque = (voidpf)0;
if (deflateInit(&session->c_stream, Z_DEFAULT_COMPRESSION) != Z_OK)
return;
session->d_stream.zalloc = (alloc_func)0;
session->d_stream.zfree = (free_func)0;
session->d_stream.opaque = (voidpf)0;
if (deflateInit(&session->d_stream, Z_DEFAULT_COMPRESSION) != Z_OK)
return;
}
virtual void OnRawSocketConnect(int fd)
{
OnRawSocketAccept(fd, "", 0);
}
virtual void OnRawSocketClose(int fd)
{
CloseSession(&sessions[fd]);
}
virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
{
izip_session* session = &sessions[fd];
if (session->status == IZIP_CLOSED)
return 1;
readresult = read(fd, buffer, count);
if (readresult > 0)
{
unsigned char uncompr[count];
if(session->status != IZIP_WAITFIRST)
{
session->d_stream.next_in = (Bytef*)buffer;
session->d_stream.avail_in = 0;
session->d_stream.next_out = uncompr;
if (inflateInit(&session->d_stream) != Z_OK)
return -EBADF;
session->status = IZIP_OPEN;
}
while ((session->d_stream.total_out < count) && (session->d_stream.total_in < (unsigned int)readresult))
{
session->d_stream.avail_in = session->d_stream.avail_out = 1; /* force small buffers */
if (inflate(&session->d_stream, Z_NO_FLUSH) == Z_STREAM_END)
break;
}
readresult = session->d_stream.total_out;
}
return (readresult > 0);
}
virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
{
if (!count)
return 0;
unsigned char compr[count*2];
izip_session* session = &sessions[fd];
if(session->status != IZIP_WAITFIRST)
{
deflateInit(&session->c_stream, Z_DEFAULT_COMPRESSION);
session->status = IZIP_OPEN;
}
if(session->status != IZIP_OPEN)
return 1;
session->c_stream.next_in = (Bytef*)buffer;
session->c_stream.next_out = compr;
while ((session->c_stream.total_in < (unsigned int)count) && (session->c_stream.total_out < (unsigned int)count*2))
{
session->c_stream.avail_in = session->c_stream.avail_out = 1; /* force small buffers */
if (deflate(&session->c_stream, Z_NO_FLUSH) != Z_OK)
return 0;
}
/* Finish the stream, still forcing small buffers: */
for (;;)
{
session->c_stream.avail_out = 1;
if (deflate(&session->c_stream, Z_FINISH) == Z_STREAM_END)
break;
}
return write(fd, compr, session->c_stream.total_out);
}
void CloseSession(izip_session* session)
{
if(session->status == IZIP_OPEN)
{
deflateEnd(&session->c_stream);
inflateEnd(&session->d_stream);
}
session->status = IZIP_CLOSED;
}
};
class ModuleZLibFactory : public ModuleFactory
{
public:
ModuleZLibFactory()
{
}
~ModuleZLibFactory()
{
}
virtual Module * CreateModule(InspIRCd* Me)
{
return new ModuleZLib(Me);
}
};
extern "C" void * init_module( void )
{
return new ModuleZLibFactory;
}
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