-/* +------------------------------------+\r * | Inspire Internet Relay Chat Daemon |\r * +------------------------------------+\r *\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team\r * See: http://www.inspircd.org/wiki/index.php/Credits\r *\r * This program is free but copyrighted software; see\r * the file COPYING for details.\r *\r * ---------------------------------------------------\r */\r\r#include "inspircd.h"\r#include <zlib.h>\r#include "users.h"\r#include "channels.h"\r#include "modules.h"\r#include "socket.h"\r#include "hashcomp.h"\r#include "transport.h"\r\r/* $ModDesc: Provides zlib link support for servers */\r/* $LinkerFlags: -lz */\r/* $ModDep: transport.h */\r\r/*\r * Compressed data is transmitted across the link in the following format:\r *\r * 0 1 2 3 4 ... n\r * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+\r * | n | Z0 -> Zn |\r * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+\r *\r * Where: n is the size of a frame, in network byte order, 4 bytes.\r * Z0 through Zn are Zlib compressed data, n bytes in length.\r *\r * If the module fails to read the entire frame, then it will buffer\r * the portion of the last frame it received, then attempt to read\r * the next part of the frame next time a write notification arrives.\r *\r * ZLIB_BEST_COMPRESSION (9) is used for all sending of data with\r * a flush after each frame. A frame may contain multiple lines\r * and should be treated as raw binary data.\r *\r */\r\r/* Status of a connection */\renum izip_status { IZIP_OPEN, IZIP_CLOSED };\r\r/* Maximum transfer size per read operation */\rconst unsigned int CHUNK = 128 * 1024;\r\r/* This class manages a compressed chunk of data preceeded by\r * a length count.\r *\r * It can handle having multiple chunks of data in the buffer\r * at any time.\r */\rclass CountedBuffer : public classbase\r{\r std::string buffer; /* Current buffer contents */\r unsigned int amount_expected; /* Amount of data expected */\r public:\r CountedBuffer()\r {\r amount_expected = 0;\r }\r\r /** Adds arbitrary compressed data to the buffer.\r * - Binsry safe, of course.\r */\r void AddData(unsigned char* data, int data_length)\r {\r buffer.append((const char*)data, data_length);\r this->NextFrameSize();\r }\r\r /** Works out the size of the next compressed frame\r */\r void NextFrameSize()\r {\r if ((!amount_expected) && (buffer.length() >= 4))\r {\r /* We have enough to read an int -\r * Yes, this is safe, but its ugly. Give me\r * a nicer way to read 4 bytes from a binary\r * stream, and push them into a 32 bit int,\r * and i'll consider replacing this.\r */\r amount_expected = ntohl((buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0]);\r buffer = buffer.substr(4);\r }\r }\r\r /** Gets the next frame and returns its size, or returns\r * zero if there isnt one available yet.\r * A frame can contain multiple plaintext lines.\r * - Binary safe.\r */\r int GetFrame(unsigned char* frame, int maxsize)\r {\r if (amount_expected)\r {\r /* We know how much we're expecting...\r * Do we have enough yet?\r */\r if (buffer.length() >= amount_expected)\r {\r int j = 0;\r for (unsigned int i = 0; i < amount_expected; i++, j++)\r frame[i] = buffer[i];\r\r buffer = buffer.substr(j);\r amount_expected = 0;\r NextFrameSize();\r return j;\r }\r }\r /* Not enough for a frame yet, COME AGAIN! */\r return 0;\r }\r};\r\r/** Represents an zipped connections extra data\r */\rclass izip_session : public classbase\r{\r public:\r z_stream c_stream; /* compression stream */\r z_stream d_stream; /* decompress stream */\r izip_status status; /* Connection status */\r int fd; /* File descriptor */\r CountedBuffer* inbuf; /* Holds input buffer */\r std::string outbuf; /* Holds output buffer */\r};\r\rclass ModuleZLib : public Module\r{\r izip_session sessions[MAX_DESCRIPTORS];\r\r /* Used for stats z extensions */\r float total_out_compressed;\r float total_in_compressed;\r float total_out_uncompressed;\r float total_in_uncompressed;\r \r public:\r \r ModuleZLib(InspIRCd* Me)\r : Module::Module(Me)\r {\r ServerInstance->PublishInterface("InspSocketHook", this);\r\r total_out_compressed = total_in_compressed = 0;\r total_out_uncompressed = total_out_uncompressed = 0;\r }\r\r virtual ~ModuleZLib()\r {\r ServerInstance->UnpublishInterface("InspSocketHook", this);\r }\r\r virtual Version GetVersion()\r {\r return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);\r }\r\r void Implements(char* List)\r {\r List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = 1;\r List[I_OnStats] = List[I_OnRequest] = 1;\r }\r\r /* Handle InspSocketHook API requests */\r virtual char* OnRequest(Request* request)\r {\r ISHRequest* ISR = (ISHRequest*)request;\r if (strcmp("IS_NAME", request->GetId()) == 0)\r {\r /* Return name */\r return "zip";\r }\r else if (strcmp("IS_HOOK", request->GetId()) == 0)\r {\r /* Attach to an inspsocket */\r char* ret = "OK";\r try\r {\r ret = ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;\r }\r catch (ModuleException& e)\r {\r return NULL;\r }\r return ret;\r }\r else if (strcmp("IS_UNHOOK", request->GetId()) == 0)\r {\r /* Detatch from an inspsocket */\r return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;\r }\r else if (strcmp("IS_HSDONE", request->GetId()) == 0)\r {\r /* Check for completion of handshake\r * (actually, this module doesnt handshake)\r */\r return "OK";\r }\r else if (strcmp("IS_ATTACH", request->GetId()) == 0)\r {\r /* Attach certificate data to the inspsocket\r * (this module doesnt do that, either)\r */\r return NULL;\r }\r return NULL;\r }\r\r /* Handle stats z (misc stats) */\r virtual int OnStats(char symbol, userrec* user, string_list &results)\r {\r if (symbol == 'z')\r {\r std::string sn = ServerInstance->Config->ServerName;\r\r /* Yeah yeah, i know, floats are ew.\r * We used them here because we'd be casting to float anyway to do this maths,\r * and also only floating point numbers can deal with the pretty large numbers\r * involved in the total throughput of a server over a large period of time.\r * (we dont count 64 bit ints because not all systems have 64 bit ints, and floats\r * can still hold more.\r */\r float outbound_r = 100 - ((total_out_compressed / (total_out_uncompressed + 0.001)) * 100);\r float inbound_r = 100 - ((total_in_compressed / (total_in_uncompressed + 0.001)) * 100);\r\r float total_compressed = total_in_compressed + total_out_compressed;\r float total_uncompressed = total_in_uncompressed + total_out_uncompressed;\r\r float total_r = 100 - ((total_compressed / (total_uncompressed + 0.001)) * 100);\r\r char outbound_ratio[MAXBUF], inbound_ratio[MAXBUF], combined_ratio[MAXBUF];\r\r sprintf(outbound_ratio, "%3.2f%%", outbound_r);\r sprintf(inbound_ratio, "%3.2f%%", inbound_r);\r sprintf(combined_ratio, "%3.2f%%", total_r);\r\r results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS outbound_compressed = "+ConvToStr(total_out_compressed));\r results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS inbound_compressed = "+ConvToStr(total_in_compressed));\r results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS outbound_uncompressed = "+ConvToStr(total_out_uncompressed));\r results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS inbound_uncompressed = "+ConvToStr(total_in_uncompressed));\r results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS outbound_ratio = "+outbound_ratio);\r results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS inbound_ratio = "+inbound_ratio);\r results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS combined_ratio = "+combined_ratio);\r return 0;\r }\r\r return 0;\r }\r\r virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)\r {\r izip_session* session = &sessions[fd];\r \r /* allocate state and buffers */\r session->fd = fd;\r session->status = IZIP_OPEN;\r session->inbuf = new CountedBuffer();\r\r session->c_stream.zalloc = (alloc_func)0;\r session->c_stream.zfree = (free_func)0;\r session->c_stream.opaque = (voidpf)0;\r\r session->d_stream.zalloc = (alloc_func)0;\r session->d_stream.zfree = (free_func)0;\r session->d_stream.opaque = (voidpf)0;\r }\r\r virtual void OnRawSocketConnect(int fd)\r {\r /* Nothing special needs doing here compared to accept() */\r OnRawSocketAccept(fd, "", 0);\r }\r\r virtual void OnRawSocketClose(int fd)\r {\r CloseSession(&sessions[fd]);\r }\r\r virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)\r {\r /* Find the sockets session */\r izip_session* session = &sessions[fd];\r\r if (session->status == IZIP_CLOSED)\r return 0;\r\r unsigned char compr[CHUNK + 4];\r unsigned int offset = 0;\r unsigned int total_size = 0;\r\r /* Read CHUNK bytes at a time to the buffer (usually 128k) */\r readresult = read(fd, compr, CHUNK);\r\r /* Did we get anything? */\r if (readresult > 0)\r {\r /* Add it to the frame queue */\r session->inbuf->AddData(compr, readresult);\r total_in_compressed += readresult;\r \r /* Parse all completed frames */\r int size = 0;\r while ((size = session->inbuf->GetFrame(compr, CHUNK)) != 0)\r {\r session->d_stream.next_in = (Bytef*)compr;\r session->d_stream.avail_in = 0;\r session->d_stream.next_out = (Bytef*)(buffer + offset);\r\r /* If we cant call this, well, we're boned. */\r if (inflateInit(&session->d_stream) != Z_OK)\r return 0;\r \r while ((session->d_stream.total_out < count) && (session->d_stream.total_in < (unsigned int)size))\r {\r session->d_stream.avail_in = session->d_stream.avail_out = 1;\r if (inflate(&session->d_stream, Z_NO_FLUSH) == Z_STREAM_END)\r break;\r }\r \r /* Stick a fork in me, i'm done */\r inflateEnd(&session->d_stream);\r\r /* Update counters and offsets */\r total_size += session->d_stream.total_out;\r total_in_uncompressed += session->d_stream.total_out;\r offset += session->d_stream.total_out;\r }\r\r /* Null-terminate the buffer -- this doesnt harm binary data */\r buffer[total_size] = 0;\r\r /* Set the read size to the correct total size */\r readresult = total_size;\r\r }\r return (readresult > 0);\r }\r\r virtual int OnRawSocketWrite(int fd, const char* buffer, int count)\r {\r izip_session* session = &sessions[fd];\r int ocount = count;\r\r if (!count) /* Nothing to do! */\r return 0;\r\r if(session->status != IZIP_OPEN)\r {\r /* Seriously, wtf? */\r CloseSession(session);\r return 0;\r }\r\r unsigned char compr[CHUNK + 4];\r\r /* Gentlemen, start your engines! */\r if (deflateInit(&session->c_stream, Z_BEST_COMPRESSION) != Z_OK)\r {\r CloseSession(session);\r return 0;\r }\r\r /* Set buffer sizes (we reserve 4 bytes at the start of the\r * buffer for the length counters)\r */\r session->c_stream.next_in = (Bytef*)buffer;\r session->c_stream.next_out = compr + 4;\r\r /* Compress the text */\r while ((session->c_stream.total_in < (unsigned int)count) && (session->c_stream.total_out < CHUNK))\r {\r session->c_stream.avail_in = session->c_stream.avail_out = 1;\r if (deflate(&session->c_stream, Z_NO_FLUSH) != Z_OK)\r {\r CloseSession(session);\r return 0;\r }\r }\r /* Finish the stream */\r for (session->c_stream.avail_out = 1; deflate(&session->c_stream, Z_FINISH) != Z_STREAM_END; session->c_stream.avail_out = 1);\r deflateEnd(&session->c_stream);\r\r total_out_uncompressed += ocount;\r total_out_compressed += session->c_stream.total_out;\r\r /** Assemble the frame length onto the frame, in network byte order */\r compr[0] = (session->c_stream.total_out >> 24);\r compr[1] = (session->c_stream.total_out >> 16);\r compr[2] = (session->c_stream.total_out >> 8);\r compr[3] = (session->c_stream.total_out & 0xFF);\r\r /* Add compressed data plus leading length to the output buffer -\r * Note, we may have incomplete half-sent frames in here.\r */\r session->outbuf.append((const char*)compr, session->c_stream.total_out + 4);\r\r /* Lets see how much we can send out */\r int ret = write(fd, session->outbuf.data(), session->outbuf.length());\r\r /* Check for errors, and advance the buffer if any was sent */\r if (ret > 0)\r session->outbuf = session->outbuf.substr(ret);\r else if (ret < 1)\r {\r if (ret == -1)\r {\r if (errno == EAGAIN)\r return 0;\r else\r {\r session->outbuf.clear();\r return 0;\r }\r }\r else\r {\r session->outbuf.clear();\r return 0;\r }\r }\r\r /* ALL LIES the lot of it, we havent really written\r * this amount, but the layer above doesnt need to know.\r */\r return ocount;\r }\r \r void CloseSession(izip_session* session)\r {\r if (session->status == IZIP_OPEN)\r {\r session->status = IZIP_CLOSED;\r session->outbuf.clear();\r delete session->inbuf;\r }\r }\r\r};\r\rMODULE_INIT(ModuleZLib);\r\r
\ No newline at end of file
+/* +------------------------------------+
+ * | Inspire Internet Relay Chat Daemon |
+ * +------------------------------------+
+ *
+ * InspIRCd: (C) 2002-2007 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
+ * This program is free but copyrighted software; see
+ * the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd.h"
+#include <zlib.h>
+#include "users.h"
+#include "channels.h"
+#include "modules.h"
+#include "socket.h"
+#include "hashcomp.h"
+#include "transport.h"
+
+/* $ModDesc: Provides zlib link support for servers */
+/* $LinkerFlags: -lz */
+/* $ModDep: transport.h */
+
+/*
+ * Compressed data is transmitted across the link in the following format:
+ *
+ * 0 1 2 3 4 ... n
+ * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
+ * | n | Z0 -> Zn |
+ * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
+ *
+ * Where: n is the size of a frame, in network byte order, 4 bytes.
+ * Z0 through Zn are Zlib compressed data, n bytes in length.
+ *
+ * If the module fails to read the entire frame, then it will buffer
+ * the portion of the last frame it received, then attempt to read
+ * the next part of the frame next time a write notification arrives.
+ *
+ * ZLIB_BEST_COMPRESSION (9) is used for all sending of data with
+ * a flush after each frame. A frame may contain multiple lines
+ * and should be treated as raw binary data.
+ *
+ */
+
+/* Status of a connection */
+enum izip_status { IZIP_OPEN, IZIP_CLOSED };
+
+/* Maximum transfer size per read operation */
+const unsigned int CHUNK = 128 * 1024;
+
+/* This class manages a compressed chunk of data preceeded by
+ * a length count.
+ *
+ * It can handle having multiple chunks of data in the buffer
+ * at any time.
+ */
+class CountedBuffer : public classbase
+{
+ std::string buffer; /* Current buffer contents */
+ unsigned int amount_expected; /* Amount of data expected */
+ public:
+ CountedBuffer()
+ {
+ amount_expected = 0;
+ }
+
+ /** Adds arbitrary compressed data to the buffer.
+ * - Binsry safe, of course.
+ */
+ void AddData(unsigned char* data, int data_length)
+ {
+ buffer.append((const char*)data, data_length);
+ this->NextFrameSize();
+ }
+
+ /** Works out the size of the next compressed frame
+ */
+ void NextFrameSize()
+ {
+ if ((!amount_expected) && (buffer.length() >= 4))
+ {
+ /* We have enough to read an int -
+ * Yes, this is safe, but its ugly. Give me
+ * a nicer way to read 4 bytes from a binary
+ * stream, and push them into a 32 bit int,
+ * and i'll consider replacing this.
+ */
+ amount_expected = ntohl((buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0]);
+ buffer = buffer.substr(4);
+ }
+ }
+
+ /** Gets the next frame and returns its size, or returns
+ * zero if there isnt one available yet.
+ * A frame can contain multiple plaintext lines.
+ * - Binary safe.
+ */
+ int GetFrame(unsigned char* frame, int maxsize)
+ {
+ if (amount_expected)
+ {
+ /* We know how much we're expecting...
+ * Do we have enough yet?
+ */
+ if (buffer.length() >= amount_expected)
+ {
+ int j = 0;
+ for (unsigned int i = 0; i < amount_expected; i++, j++)
+ frame[i] = buffer[i];
+
+ buffer = buffer.substr(j);
+ amount_expected = 0;
+ NextFrameSize();
+ return j;
+ }
+ }
+ /* Not enough for a frame yet, COME AGAIN! */
+ return 0;
+ }
+};
+
+/** Represents an zipped connections extra data
+ */
+class izip_session : public classbase
+{
+ public:
+ z_stream c_stream; /* compression stream */
+ z_stream d_stream; /* decompress stream */
+ izip_status status; /* Connection status */
+ int fd; /* File descriptor */
+ CountedBuffer* inbuf; /* Holds input buffer */
+ std::string outbuf; /* Holds output buffer */
+};
+
+class ModuleZLib : public Module
+{
+ izip_session sessions[MAX_DESCRIPTORS];
+
+ /* Used for stats z extensions */
+ float total_out_compressed;
+ float total_in_compressed;
+ float total_out_uncompressed;
+ float total_in_uncompressed;
+
+ public:
+
+ ModuleZLib(InspIRCd* Me)
+ : Module::Module(Me)
+ {
+ ServerInstance->PublishInterface("InspSocketHook", this);
+
+ total_out_compressed = total_in_compressed = 0;
+ total_out_uncompressed = total_out_uncompressed = 0;
+ }
+
+ virtual ~ModuleZLib()
+ {
+ ServerInstance->UnpublishInterface("InspSocketHook", this);
+ }
+
+ 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_OnStats] = List[I_OnRequest] = 1;
+ }
+
+ /* Handle InspSocketHook API requests */
+ virtual char* OnRequest(Request* request)
+ {
+ ISHRequest* ISR = (ISHRequest*)request;
+ if (strcmp("IS_NAME", request->GetId()) == 0)
+ {
+ /* Return name */
+ return "zip";
+ }
+ else if (strcmp("IS_HOOK", request->GetId()) == 0)
+ {
+ /* Attach to an inspsocket */
+ char* ret = "OK";
+ try
+ {
+ ret = ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
+ }
+ catch (ModuleException& e)
+ {
+ return NULL;
+ }
+ return ret;
+ }
+ else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
+ {
+ /* Detatch from an inspsocket */
+ return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
+ }
+ else if (strcmp("IS_HSDONE", request->GetId()) == 0)
+ {
+ /* Check for completion of handshake
+ * (actually, this module doesnt handshake)
+ */
+ return "OK";
+ }
+ else if (strcmp("IS_ATTACH", request->GetId()) == 0)
+ {
+ /* Attach certificate data to the inspsocket
+ * (this module doesnt do that, either)
+ */
+ return NULL;
+ }
+ return NULL;
+ }
+
+ /* Handle stats z (misc stats) */
+ virtual int OnStats(char symbol, userrec* user, string_list &results)
+ {
+ if (symbol == 'z')
+ {
+ std::string sn = ServerInstance->Config->ServerName;
+
+ /* Yeah yeah, i know, floats are ew.
+ * We used them here because we'd be casting to float anyway to do this maths,
+ * and also only floating point numbers can deal with the pretty large numbers
+ * involved in the total throughput of a server over a large period of time.
+ * (we dont count 64 bit ints because not all systems have 64 bit ints, and floats
+ * can still hold more.
+ */
+ float outbound_r = 100 - ((total_out_compressed / (total_out_uncompressed + 0.001)) * 100);
+ float inbound_r = 100 - ((total_in_compressed / (total_in_uncompressed + 0.001)) * 100);
+
+ float total_compressed = total_in_compressed + total_out_compressed;
+ float total_uncompressed = total_in_uncompressed + total_out_uncompressed;
+
+ float total_r = 100 - ((total_compressed / (total_uncompressed + 0.001)) * 100);
+
+ char outbound_ratio[MAXBUF], inbound_ratio[MAXBUF], combined_ratio[MAXBUF];
+
+ sprintf(outbound_ratio, "%3.2f%%", outbound_r);
+ sprintf(inbound_ratio, "%3.2f%%", inbound_r);
+ sprintf(combined_ratio, "%3.2f%%", total_r);
+
+ results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS outbound_compressed = "+ConvToStr(total_out_compressed));
+ results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS inbound_compressed = "+ConvToStr(total_in_compressed));
+ results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS outbound_uncompressed = "+ConvToStr(total_out_uncompressed));
+ results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS inbound_uncompressed = "+ConvToStr(total_in_uncompressed));
+ results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS outbound_ratio = "+outbound_ratio);
+ results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS inbound_ratio = "+inbound_ratio);
+ results.push_back(sn+" 304 "+user->nick+" :ZIPSTATS combined_ratio = "+combined_ratio);
+ return 0;
+ }
+
+ return 0;
+ }
+
+ virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
+ {
+ izip_session* session = &sessions[fd];
+
+ /* allocate state and buffers */
+ session->fd = fd;
+ session->status = IZIP_OPEN;
+ session->inbuf = new CountedBuffer();
+
+ session->c_stream.zalloc = (alloc_func)0;
+ session->c_stream.zfree = (free_func)0;
+ session->c_stream.opaque = (voidpf)0;
+
+ session->d_stream.zalloc = (alloc_func)0;
+ session->d_stream.zfree = (free_func)0;
+ session->d_stream.opaque = (voidpf)0;
+ }
+
+ virtual void OnRawSocketConnect(int fd)
+ {
+ /* Nothing special needs doing here compared to accept() */
+ OnRawSocketAccept(fd, "", 0);
+ }
+
+ virtual void OnRawSocketClose(int fd)
+ {
+ CloseSession(&sessions[fd]);
+ }
+
+ virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
+ {
+ /* Find the sockets session */
+ izip_session* session = &sessions[fd];
+
+ if (session->status == IZIP_CLOSED)
+ return 0;
+
+ unsigned char compr[CHUNK + 4];
+ unsigned int offset = 0;
+ unsigned int total_size = 0;
+
+ /* Read CHUNK bytes at a time to the buffer (usually 128k) */
+ readresult = read(fd, compr, CHUNK);
+
+ /* Did we get anything? */
+ if (readresult > 0)
+ {
+ /* Add it to the frame queue */
+ session->inbuf->AddData(compr, readresult);
+ total_in_compressed += readresult;
+
+ /* Parse all completed frames */
+ int size = 0;
+ while ((size = session->inbuf->GetFrame(compr, CHUNK)) != 0)
+ {
+ session->d_stream.next_in = (Bytef*)compr;
+ session->d_stream.avail_in = 0;
+ session->d_stream.next_out = (Bytef*)(buffer + offset);
+
+ /* If we cant call this, well, we're boned. */
+ if (inflateInit(&session->d_stream) != Z_OK)
+ return 0;
+
+ while ((session->d_stream.total_out < count) && (session->d_stream.total_in < (unsigned int)size))
+ {
+ session->d_stream.avail_in = session->d_stream.avail_out = 1;
+ if (inflate(&session->d_stream, Z_NO_FLUSH) == Z_STREAM_END)
+ break;
+ }
+
+ /* Stick a fork in me, i'm done */
+ inflateEnd(&session->d_stream);
+
+ /* Update counters and offsets */
+ total_size += session->d_stream.total_out;
+ total_in_uncompressed += session->d_stream.total_out;
+ offset += session->d_stream.total_out;
+ }
+
+ /* Null-terminate the buffer -- this doesnt harm binary data */
+ buffer[total_size] = 0;
+
+ /* Set the read size to the correct total size */
+ readresult = total_size;
+
+ }
+ return (readresult > 0);
+ }
+
+ virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
+ {
+ izip_session* session = &sessions[fd];
+ int ocount = count;
+
+ if (!count) /* Nothing to do! */
+ return 0;
+
+ if(session->status != IZIP_OPEN)
+ {
+ /* Seriously, wtf? */
+ CloseSession(session);
+ return 0;
+ }
+
+ unsigned char compr[CHUNK + 4];
+
+ /* Gentlemen, start your engines! */
+ if (deflateInit(&session->c_stream, Z_BEST_COMPRESSION) != Z_OK)
+ {
+ CloseSession(session);
+ return 0;
+ }
+
+ /* Set buffer sizes (we reserve 4 bytes at the start of the
+ * buffer for the length counters)
+ */
+ session->c_stream.next_in = (Bytef*)buffer;
+ session->c_stream.next_out = compr + 4;
+
+ /* Compress the text */
+ while ((session->c_stream.total_in < (unsigned int)count) && (session->c_stream.total_out < CHUNK))
+ {
+ session->c_stream.avail_in = session->c_stream.avail_out = 1;
+ if (deflate(&session->c_stream, Z_NO_FLUSH) != Z_OK)
+ {
+ CloseSession(session);
+ return 0;
+ }
+ }
+ /* Finish the stream */
+ for (session->c_stream.avail_out = 1; deflate(&session->c_stream, Z_FINISH) != Z_STREAM_END; session->c_stream.avail_out = 1);
+ deflateEnd(&session->c_stream);
+
+ total_out_uncompressed += ocount;
+ total_out_compressed += session->c_stream.total_out;
+
+ /** Assemble the frame length onto the frame, in network byte order */
+ compr[0] = (session->c_stream.total_out >> 24);
+ compr[1] = (session->c_stream.total_out >> 16);
+ compr[2] = (session->c_stream.total_out >> 8);
+ compr[3] = (session->c_stream.total_out & 0xFF);
+
+ /* Add compressed data plus leading length to the output buffer -
+ * Note, we may have incomplete half-sent frames in here.
+ */
+ session->outbuf.append((const char*)compr, session->c_stream.total_out + 4);
+
+ /* Lets see how much we can send out */
+ int ret = write(fd, session->outbuf.data(), session->outbuf.length());
+
+ /* Check for errors, and advance the buffer if any was sent */
+ if (ret > 0)
+ session->outbuf = session->outbuf.substr(ret);
+ else if (ret < 1)
+ {
+ if (ret == -1)
+ {
+ if (errno == EAGAIN)
+ return 0;
+ else
+ {
+ session->outbuf.clear();
+ return 0;
+ }
+ }
+ else
+ {
+ session->outbuf.clear();
+ return 0;
+ }
+ }
+
+ /* ALL LIES the lot of it, we havent really written
+ * this amount, but the layer above doesnt need to know.
+ */
+ return ocount;
+ }
+
+ void CloseSession(izip_session* session)
+ {
+ if (session->status == IZIP_OPEN)
+ {
+ session->status = IZIP_CLOSED;
+ session->outbuf.clear();
+ delete session->inbuf;
+ }
+ }
+
+};
+
+MODULE_INIT(ModuleZLib);
+
projects / user / henk / code / inspircd.git / blobdiff