]> git.netwichtig.de Git - user/henk/code/inspircd.git/blobdiff - src/inspsocket.cpp
Fix potential for ssl to block, based on patch submitted by djGrrr, adjusted for...
[user/henk/code/inspircd.git] / src / inspsocket.cpp
index 6fd7785e4e789abfe25062d94778b6c61c24b8a9..dc0c5bebafc7e519f22252f9f683837de4066e83 100644 (file)
  */
 
 #include "socket.h"
-#include "configreader.h"
 #include "inspstring.h"
 #include "socketengine.h"
 #include "inspircd.h"
 
 using irc::sockets::OpenTCPSocket;
-using irc::sockets::insp_inaddr;
-using irc::sockets::insp_sockaddr;
 
 bool InspSocket::Readable()
 {
@@ -28,6 +25,7 @@ bool InspSocket::Readable()
 
 InspSocket::InspSocket(InspIRCd* SI)
 {
+       this->Timeout = NULL;
        this->state = I_DISCONNECTED;
        this->fd = -1;
        this->WaitingForWriteEvent = false;
@@ -37,6 +35,7 @@ InspSocket::InspSocket(InspIRCd* SI)
 
 InspSocket::InspSocket(InspIRCd* SI, int newfd, const char* ip)
 {
+       this->Timeout = NULL;
        this->fd = newfd;
        this->state = I_CONNECTED;
        strlcpy(this->IP,ip,MAXBUF);
@@ -47,16 +46,18 @@ InspSocket::InspSocket(InspIRCd* SI, int newfd, const char* ip)
                this->Instance->SE->AddFd(this);
 }
 
-InspSocket::InspSocket(InspIRCd* SI, const std::string &ipaddr, int aport, bool listening, unsigned long maxtime)
+InspSocket::InspSocket(InspIRCd* SI, const std::string &ipaddr, int aport, bool listening, unsigned long maxtime, const std::string &connectbindip)
 {
+       this->cbindip = connectbindip;
        this->fd = -1;
        this->Instance = SI;
        strlcpy(host,ipaddr.c_str(),MAXBUF);
        this->WaitingForWriteEvent = false;
        this->IsIOHooked = false;
+       this->Timeout = NULL;
        if (listening)
        {
-               if ((this->fd = OpenTCPSocket()) == ERROR)
+               if ((this->fd = OpenTCPSocket(host)) == ERROR)
                {
                        this->fd = -1;
                        this->state = I_ERROR;
@@ -65,7 +66,7 @@ InspSocket::InspSocket(InspIRCd* SI, const std::string &ipaddr, int aport, bool
                }
                else
                {
-                       if (!SI->BindSocket(this->fd,this->client,this->server,aport,(char*)ipaddr.c_str()))
+                       if (!SI->BindSocket(this->fd,aport,(char*)ipaddr.c_str()))
                        {
                                this->Close();
                                this->fd = -1;
@@ -77,6 +78,7 @@ InspSocket::InspSocket(InspIRCd* SI, const std::string &ipaddr, int aport, bool
                        else
                        {
                                this->state = I_LISTENING;
+                               this->port = aport;
                                if (this->fd > -1)
                                {
                                        if (!this->Instance->SE->AddFd(this))
@@ -88,27 +90,49 @@ InspSocket::InspSocket(InspIRCd* SI, const std::string &ipaddr, int aport, bool
                                }
                                return;
                        }
-               }                       
+               }
        }
        else
        {
                strlcpy(this->host,ipaddr.c_str(),MAXBUF);
                this->port = aport;
 
-               if (insp_aton(host,&addy) < 1)
+               bool ipvalid = true;
+#ifdef IPV6
+               if (strchr(host,':'))
+               {
+                       in6_addr n;
+                       if (inet_pton(AF_INET6, host, &n) < 1)
+                               ipvalid = false;
+               }
+               else
+#endif
+               {
+                       in_addr n;
+                       if (inet_aton(host,&n) < 1)
+                               ipvalid = false;
+               }
+               if (!ipvalid)
                {
                        this->Instance->Log(DEBUG,"BUG: Hostname passed to InspSocket, rather than an IP address!");
+                       this->OnError(I_ERR_CONNECT);
                        this->Close();
                        this->fd = -1;
                        this->state = I_ERROR;
-                       this->OnError(I_ERR_RESOLVE);
                        return;
                }
                else
                {
                        strlcpy(this->IP,host,MAXBUF);
                        timeout_val = maxtime;
-                       this->DoConnect();
+                       if (!this->DoConnect())
+                       {
+                               this->OnError(I_ERR_CONNECT);
+                               this->Close();
+                               this->fd = -1;
+                               this->state = I_ERROR;
+                               return;
+                       }
                }
        }
 }
@@ -124,8 +148,8 @@ void InspSocket::SetQueues(int nfd)
        // attempt to increase socket sendq and recvq as high as its possible
        int sendbuf = 32768;
        int recvbuf = 32768;
-       setsockopt(nfd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
-       setsockopt(nfd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
+       if(setsockopt(nfd,SOL_SOCKET,SO_SNDBUF,(const char *)&sendbuf,sizeof(sendbuf)) || setsockopt(nfd,SOL_SOCKET,SO_RCVBUF,(const char *)&recvbuf,sizeof(sendbuf)))
+               this->Instance->Log(DEFAULT, "Could not increase SO_SNDBUF/SO_RCVBUF for socket %u", GetFd());
 }
 
 /* Most irc servers require you to specify the ip you want to bind to.
@@ -136,74 +160,156 @@ void InspSocket::SetQueues(int nfd)
  * This is easier to configure when you have a lot of links and a lot
  * of servers to configure.
  */
-bool InspSocket::BindAddr()
+bool InspSocket::BindAddr(const std::string &ip)
 {
-       insp_inaddr n;
        ConfigReader Conf(this->Instance);
-       for (int j =0; j < Conf.Enumerate("bind"); j++)
+       socklen_t size = sizeof(sockaddr_in);
+#ifdef IPV6
+       bool v6 = false;
+       /* Are we looking for a binding to fit an ipv6 host? */
+       if ((ip.empty()) || (ip.find(':') != std::string::npos))
+               v6 = true;
+#endif
+       int j = 0;
+       while (j < Conf.Enumerate("bind") || (!ip.empty()))
        {
-               std::string Type = Conf.ReadValue("bind","type",j);
-               std::string IP = Conf.ReadValue("bind","address",j);
-               if (Type == "servers")
+               std::string IP = ip.empty() ? Conf.ReadValue("bind","address",j) : ip;
+               if (!ip.empty() || Conf.ReadValue("bind","type",j) == "servers")
                {
-                       if ((IP != "*") && (IP != "127.0.0.1") && (IP != "") && (IP != "::1"))
+                       if (!ip.empty() || ((IP != "*") && (IP != "127.0.0.1") && (!IP.empty()) && (IP != "::1")))
                        {
-                               insp_sockaddr s;
-
-                               if (insp_aton(IP.c_str(),&n) > 0)
-                               {
+                               /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
+                               sockaddr* s = new sockaddr[2];
 #ifdef IPV6
-                                       memcpy(&s.sin6_addr, &n, sizeof(n));
-                                       s.sin6_family = AF_FAMILY;
-#else
-                                       s.sin_addr = n;
-                                       s.sin_family = AF_FAMILY;
+                               if (v6)
+                               {
+                                       in6_addr n;
+                                       if (inet_pton(AF_INET6, IP.c_str(), &n) > 0)
+                                       {
+                                               memcpy(&((sockaddr_in6*)s)->sin6_addr, &n, sizeof(sockaddr_in6));
+                                               ((sockaddr_in6*)s)->sin6_port = 0;
+                                               ((sockaddr_in6*)s)->sin6_family = AF_INET6;
+                                               size = sizeof(sockaddr_in6);
+                                       }
+                                       else
+                                       {
+                                               delete[] s;
+                                               j++;
+                                               continue;
+                                       }
+                               }
+                               else
 #endif
-                                       if (bind(this->fd,(struct sockaddr*)&s,sizeof(s)) < 0)
+                               {
+                                       in_addr n;
+                                       if (inet_aton(IP.c_str(), &n) > 0)
                                        {
-                                               this->state = I_ERROR;
-                                               this->OnError(I_ERR_BIND);
-                                               this->fd = -1;
-                                               return false;
+                                               ((sockaddr_in*)s)->sin_addr = n;
+                                               ((sockaddr_in*)s)->sin_port = 0;
+                                               ((sockaddr_in*)s)->sin_family = AF_INET;
                                        }
-                                       return true;
+                                       else
+                                       {
+                                               delete[] s;
+                                               j++;
+                                               continue;
+                                       }
+                               }
+
+                               if (Instance->SE->Bind(this->fd, s, size) < 0)
+                               {
+                                       this->state = I_ERROR;
+                                       this->OnError(I_ERR_BIND);
+                                       this->fd = -1;
+                                       delete[] s;
+                                       return false;
                                }
+
+                               delete[] s;
+                               return true;
                        }
                }
+               j++;
        }
        return true;
 }
 
 bool InspSocket::DoConnect()
 {
-       if ((this->fd = socket(AF_FAMILY, SOCK_STREAM, 0)) == -1)
+       /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
+       sockaddr* addr = new sockaddr[2];
+       socklen_t size = sizeof(sockaddr_in);
+#ifdef IPV6
+       bool v6 = false;
+       if ((!*this->host) || strchr(this->host, ':'))
+               v6 = true;
+
+       if (v6)
+       {
+               this->fd = socket(AF_INET6, SOCK_STREAM, 0);
+               if ((this->fd > -1) && ((strstr(this->IP,"::ffff:") != (char*)&this->IP) && (strstr(this->IP,"::FFFF:") != (char*)&this->IP)))
+               {
+                       if (!this->BindAddr(this->cbindip))
+                       {
+                               delete[] addr;
+                               return false;
+                       }
+               }
+       }
+       else
+#endif
+       {
+               this->fd = socket(AF_INET, SOCK_STREAM, 0);
+               if (this->fd > -1)
+               {
+                       if (!this->BindAddr(this->cbindip))
+                       {
+                               delete[] addr;
+                               return false;
+                       }
+               }
+       }
+
+       if (this->fd == -1)
        {
                this->state = I_ERROR;
                this->OnError(I_ERR_SOCKET);
+               delete[] addr;
                return false;
        }
 
-       if ((strstr(this->IP,"::ffff:") != (char*)&this->IP) && (strstr(this->IP,"::FFFF:") != (char*)&this->IP))
+#ifdef IPV6
+       if (v6)
        {
-               if (!this->BindAddr())
-                       return false;
+               in6_addr addy;
+               if (inet_pton(AF_INET6, this->host, &addy) > 0)
+               {
+                       ((sockaddr_in6*)addr)->sin6_family = AF_INET6;
+                       memcpy(&((sockaddr_in6*)addr)->sin6_addr, &addy, sizeof(addy));
+                       ((sockaddr_in6*)addr)->sin6_port = htons(this->port);
+                       size = sizeof(sockaddr_in6);
+               }
        }
-
-       insp_aton(this->IP,&addy);
-#ifdef IPV6
-       addr.sin6_family = AF_FAMILY;
-       memcpy(&addr.sin6_addr, &addy, sizeof(addy));
-       addr.sin6_port = htons(this->port);
-#else
-       addr.sin_family = AF_FAMILY;
-       addr.sin_addr = addy;
-       addr.sin_port = htons(this->port);
+       else
 #endif
+       {
+               in_addr addy;
+               if (inet_aton(this->host, &addy) > 0)
+               {
+                       ((sockaddr_in*)addr)->sin_family = AF_INET;
+                       ((sockaddr_in*)addr)->sin_addr = addy;
+                       ((sockaddr_in*)addr)->sin_port = htons(this->port);
+               }
+       }
 
-       int flags = fcntl(this->fd, F_GETFL, 0);
-       fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
+       Instance->SE->NonBlocking(this->fd);
 
-       if (connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)) == -1)
+#ifdef WIN32
+       /* UGH for the LOVE OF ZOMBIE JESUS SOMEONE FIX THIS!!!!!!!!!!! */
+       Instance->SE->Blocking(this->fd);
+#endif
+
+       if (Instance->SE->Connect(this, (sockaddr*)addr, size) == -1)
        {
                if (errno != EINPROGRESS)
                {
@@ -216,6 +322,10 @@ bool InspSocket::DoConnect()
                this->Timeout = new SocketTimeout(this->GetFd(), this->Instance, this, timeout_val, this->Instance->Time());
                this->Instance->Timers->AddTimer(this->Timeout);
        }
+#ifdef WIN32
+       /* CRAQ SMOKING STUFF TO BE FIXED */
+       Instance->SE->NonBlocking(this->fd);
+#endif
        this->state = I_CONNECTING;
        if (this->fd > -1)
        {
@@ -241,7 +351,7 @@ void InspSocket::Close()
        int save = errno;
        if (this->fd > -1)
        {
-                if (this->IsIOHooked && Instance->Config->GetIOHook(this))
+               if (this->IsIOHooked && Instance->Config->GetIOHook(this))
                {
                        try
                        {
@@ -252,9 +362,12 @@ void InspSocket::Close()
                                Instance->Log(DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
                        }
                }
-               this->OnClose();
-               shutdown(this->fd,2);
-               close(this->fd);
+               Instance->SE->Shutdown(this, 2);
+               if (Instance->SE->Close(this) != -1)
+                       this->OnClose();
+
+               if (Instance->SocketCull.find(this) == Instance->SocketCull.end())
+                       Instance->SocketCull[this] = this;
        }
        errno = save;
 }
@@ -266,7 +379,7 @@ std::string InspSocket::GetIP()
 
 char* InspSocket::Read()
 {
-       if ((fd < 0) || (fd > MAX_DESCRIPTORS))
+       if (!Instance->SE->BoundsCheckFd(this))
                return NULL;
 
        int n = 0;
@@ -341,28 +454,11 @@ bool InspSocket::FlushWriteBuffer()
                        {
                                try
                                {
-                                       int result = Instance->Config->GetIOHook(this)->OnRawSocketWrite(this->fd, outbuffer[0].c_str(), outbuffer[0].length());
-                                       if (result > 0)
-                                       {
-                                               if ((unsigned int)result == outbuffer[0].length())
-                                               {
-                                                       outbuffer.pop_front();
-                                               }
-                                               else
-                                               {
-                                                       std::string temp = outbuffer[0].substr(result);
-                                                       outbuffer[0] = temp;
-                                                       errno = EAGAIN;
-                                               }
-                                       }
-                                       else if (((result == -1) && (errno != EAGAIN)) || (result == 0))
-                                       {
-                                               this->OnError(I_ERR_WRITE);
-                                               this->state = I_ERROR;
-                                               this->Instance->SE->DelFd(this);
-                                               this->Close();
-                                               return true;
-                                       }
+                                       /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
+                                        * implement their own buffering mechanisms
+                                        */
+                                       Instance->Config->GetIOHook(this)->OnRawSocketWrite(this->fd, outbuffer[0].c_str(), outbuffer[0].length());
+                                       outbuffer.pop_front();
                                }
                                catch (CoreException& modexcept)
                                {
@@ -379,10 +475,11 @@ bool InspSocket::FlushWriteBuffer()
                        while (outbuffer.size() && (errno != EAGAIN))
                        {
                                /* Send a line */
-                               int result = write(this->fd,outbuffer[0].c_str(),outbuffer[0].length());
+                               int result = Instance->SE->Send(this, outbuffer[0].c_str(), outbuffer[0].length(), 0);
+
                                if (result > 0)
                                {
-                                       if ((unsigned int)result == outbuffer[0].length())
+                                       if ((unsigned int)result >= outbuffer[0].length())
                                        {
                                                /* The whole block was written (usually a line)
                                                 * Pop the block off the front of the queue,
@@ -403,6 +500,12 @@ bool InspSocket::FlushWriteBuffer()
                                                errno = EAGAIN;
                                        }
                                }
+                               else if (result == 0)
+                               {
+                                       this->Instance->SE->DelFd(this);
+                                       this->Close();
+                                       return true;
+                               }
                                else if ((result == -1) && (errno != EAGAIN))
                                {
                                        this->OnError(I_ERR_WRITE);
@@ -437,26 +540,30 @@ void SocketTimeout::Tick(time_t now)
                this->sock->OnTimeout();
                this->sock->OnError(I_ERR_TIMEOUT);
                this->sock->timeout = true;
-               ServerInstance->SE->DelFd(this->sock);
+
                /* NOTE: We must set this AFTER DelFd, as we added
                 * this socket whilst writeable. This means that we
                 * must DELETE the socket whilst writeable too!
                 */
                this->sock->state = I_ERROR;
-               this->sock->Close();
-               delete this->sock;
-               return;
+
+               if (ServerInstance->SocketCull.find(this->sock) == ServerInstance->SocketCull.end())
+                       ServerInstance->SocketCull[this->sock] = this->sock;
        }
+
+       this->sock->Timeout = NULL;
 }
 
 bool InspSocket::Poll()
 {
-       if (this->Instance->SE->GetRef(this->fd) != this)
-               return false;
-
        int incoming = -1;
 
-       if ((fd < 0) || (fd > MAX_DESCRIPTORS))
+#ifndef WINDOWS
+       if (!Instance->SE->BoundsCheckFd(this))
+               return false;
+#endif
+
+       if (Instance->SE->GetRef(this->fd) != this)
                return false;
 
        switch (this->state)
@@ -465,15 +572,19 @@ bool InspSocket::Poll()
                        /* Our socket was in write-state, so delete it and re-add it
                         * in read-state.
                         */
+#ifndef WINDOWS
                        if (this->fd > -1)
                        {
                                this->Instance->SE->DelFd(this);
-                               this->SetState(I_CONNECTED);
                                if (!this->Instance->SE->AddFd(this))
                                        return false;
                        }
+#endif
+                       this->SetState(I_CONNECTED);
+
                        if (Instance->Config->GetIOHook(this))
                        {
+                               Instance->Log(DEBUG,"Hook for raw connect");
                                try
                                {
                                        Instance->Config->GetIOHook(this)->OnRawSocketConnect(this->fd);
@@ -486,24 +597,34 @@ bool InspSocket::Poll()
                        return this->OnConnected();
                break;
                case I_LISTENING:
-                       length = sizeof (client);
-                       incoming = accept (this->fd, (sockaddr*)&client,&length);
-
+               {
+                       /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
+                       sockaddr* client = new sockaddr[2];
+                       length = sizeof (sockaddr_in);
+                       std::string recvip;
 #ifdef IPV6
-                       this->OnIncomingConnection(incoming, (char*)insp_ntoa(client.sin6_addr));
-#else
-                       this->OnIncomingConnection(incoming, (char*)insp_ntoa(client.sin_addr));
+                       if ((!*this->host) || strchr(this->host, ':'))
+                               length = sizeof(sockaddr_in6);
 #endif
+                       incoming = Instance->SE->Accept(this, client, &length);
+#ifdef IPV6
+                       if ((!*this->host) || strchr(this->host, ':'))
+                       {
+                               char buf[1024];
+                               recvip = inet_ntop(AF_INET6, &((sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf));
+                       }
+                       else
+#endif
+                       Instance->SE->NonBlocking(incoming);
+
+                       recvip = inet_ntoa(((sockaddr_in*)client)->sin_addr);
+                       this->OnIncomingConnection(incoming, (char*)recvip.c_str());
 
                        if (this->IsIOHooked)
                        {
                                try
                                {
-#ifdef IPV6
-                                       Instance->Config->GetIOHook(this)->OnRawSocketAccept(incoming, insp_ntoa(client.sin6_addr), this->port);
-#else
-                                       Instance->Config->GetIOHook(this)->OnRawSocketAccept(incoming, insp_ntoa(client.sin_addr), this->port);
-#endif
+                                       Instance->Config->GetIOHook(this)->OnRawSocketAccept(incoming, recvip.c_str(), this->port);
                                }
                                catch (CoreException& modexcept)
                                {
@@ -512,7 +633,10 @@ bool InspSocket::Poll()
                        }
 
                        this->SetQueues(incoming);
+
+                       delete[] client;
                        return true;
+               }
                break;
                case I_CONNECTED:
                        /* Process the read event */
@@ -551,6 +675,11 @@ void InspSocket::OnClose() { return; }
 InspSocket::~InspSocket()
 {
        this->Close();
+       if (Timeout)
+       {
+               Instance->Timers->DelTimer(Timeout);
+               Timeout = NULL;
+       }
 }
 
 void InspSocket::HandleEvent(EventType et, int errornum)
@@ -558,17 +687,32 @@ void InspSocket::HandleEvent(EventType et, int errornum)
        switch (et)
        {
                case EVENT_ERROR:
-                       this->Instance->SE->DelFd(this);
-                       this->Close();
-                       delete this;
+                       switch (errornum)
+                       {
+                               case ETIMEDOUT:
+                                       this->OnError(I_ERR_TIMEOUT);
+                               break;
+                               case ECONNREFUSED:
+                               case 0:
+                                       this->OnError(this->state == I_CONNECTING ? I_ERR_CONNECT : I_ERR_WRITE);
+                               break;
+                               case EADDRINUSE:
+                                       this->OnError(I_ERR_BIND);
+                               break;
+                               case EPIPE:
+                               case EIO:
+                                       this->OnError(I_ERR_WRITE);
+                               break;
+                       }
+                       if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
+                               this->Instance->SocketCull[this] = this;
                        return;
                break;
                case EVENT_READ:
                        if (!this->Poll())
                        {
-                               this->Instance->SE->DelFd(this);
-                               this->Close();
-                               delete this;
+                               if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
+                                       this->Instance->SocketCull[this] = this;
                                return;
                        }
                break;
@@ -578,9 +722,8 @@ void InspSocket::HandleEvent(EventType et, int errornum)
                                this->WaitingForWriteEvent = false;
                                if (!this->OnWriteReady())
                                {
-                                       this->Instance->SE->DelFd(this);
-                                       this->Close();
-                                       delete this;
+                                       if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
+                                               this->Instance->SocketCull[this] = this;
                                        return;
                                }
                        }
@@ -599,9 +742,8 @@ void InspSocket::HandleEvent(EventType et, int errornum)
                        {
                                if (this->FlushWriteBuffer())
                                {
-                                       this->Instance->SE->DelFd(this);
-                                       this->Close();
-                                       delete this;
+                                       if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
+                                               this->Instance->SocketCull[this] = this;
                                        return;
                                }
                        }