summaryrefslogtreecommitdiff
path: root/src/inspsocket.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/inspsocket.cpp')
-rw-r--r--src/inspsocket.cpp421
1 files changed, 421 insertions, 0 deletions
diff --git a/src/inspsocket.cpp b/src/inspsocket.cpp
new file mode 100644
index 000000000..8177a3182
--- /dev/null
+++ b/src/inspsocket.cpp
@@ -0,0 +1,421 @@
+/* +------------------------------------+
+ * | Inspire Internet Relay Chat Daemon |
+ * +------------------------------------+
+ *
+ * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
+ * E-mail:
+ * <brain@chatspike.net>
+ * <Craig@chatspike.net>
+ *
+ * Written by Craig Edwards, Craig McLure, and others.
+ * This program is free but copyrighted software; see
+ * the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd_config.h"
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <string>
+#include <unistd.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <sstream>
+#include <iostream>
+#include <fstream>
+#include <stdexcept>
+#include "socket.h"
+#include "inspircd.h"
+#include "configreader.h"
+#include "inspstring.h"
+#include "helperfuncs.h"
+#include "socketengine.h"
+
+
+extern InspIRCd* ServerInstance;
+extern ServerConfig* Config;
+extern time_t TIME;
+
+InspSocket* socket_ref[MAX_DESCRIPTORS];
+
+InspSocket::InspSocket()
+{
+ this->state = I_DISCONNECTED;
+ this->fd = -1;
+ this->ClosePending = false;
+}
+
+InspSocket::InspSocket(int newfd, char* ip)
+{
+ this->fd = newfd;
+ this->state = I_CONNECTED;
+ strlcpy(this->IP,ip,MAXBUF);
+ this->ClosePending = false;
+ ServerInstance->SE->AddFd(this->fd,true,X_ESTAB_MODULE);
+ socket_ref[this->fd] = this;
+}
+
+InspSocket::InspSocket(const std::string &ahost, int aport, bool listening, unsigned long maxtime) : fd(-1)
+{
+ strlcpy(host,ahost.c_str(),MAXBUF);
+ this->ClosePending = false;
+ if (listening) {
+ if ((this->fd = OpenTCPSocket()) == ERROR)
+ {
+ this->fd = -1;
+ this->state = I_ERROR;
+ this->OnError(I_ERR_SOCKET);
+ this->ClosePending = true;
+ log(DEBUG,"OpenTCPSocket() error");
+ return;
+ }
+ else
+ {
+ if (!BindSocket(this->fd,this->client,this->server,aport,(char*)ahost.c_str()))
+ {
+ this->Close();
+ this->fd = -1;
+ this->state = I_ERROR;
+ this->OnError(I_ERR_BIND);
+ this->ClosePending = true;
+ log(DEBUG,"BindSocket() error %s",strerror(errno));
+ return;
+ }
+ else
+ {
+ this->state = I_LISTENING;
+ ServerInstance->SE->AddFd(this->fd,true,X_ESTAB_MODULE);
+ socket_ref[this->fd] = this;
+ log(DEBUG,"New socket now in I_LISTENING state");
+ return;
+ }
+ }
+ }
+ else
+ {
+ strlcpy(this->host,ahost.c_str(),MAXBUF);
+ this->port = aport;
+
+ if (!inet_aton(host,&addy))
+ {
+ log(DEBUG,"Attempting to resolve %s",this->host);
+ /* Its not an ip, spawn the resolver */
+ this->dns.SetNS(std::string(Config->DNSServer));
+ this->dns.ForwardLookupWithFD(host,fd);
+ timeout_end = time(NULL) + maxtime;
+ timeout = false;
+ this->state = I_RESOLVING;
+ socket_ref[this->fd] = this;
+ }
+ else
+ {
+ log(DEBUG,"No need to resolve %s",this->host);
+ strlcpy(this->IP,host,MAXBUF);
+ timeout_end = time(NULL) + maxtime;
+ this->DoConnect();
+ }
+ }
+}
+
+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));
+}
+
+bool InspSocket::DoResolve()
+{
+ log(DEBUG,"In DoResolve(), trying to resolve IP");
+ if (this->dns.HasResult())
+ {
+ log(DEBUG,"Socket has result");
+ std::string res_ip = dns.GetResultIP();
+ if (res_ip != "")
+ {
+ log(DEBUG,"Socket result set to %s",res_ip.c_str());
+ strlcpy(this->IP,res_ip.c_str(),MAXBUF);
+ socket_ref[this->fd] = NULL;
+ }
+ else
+ {
+ log(DEBUG,"Socket DNS failure");
+ this->Close();
+ this->state = I_ERROR;
+ this->OnError(I_ERR_RESOLVE);
+ this->fd = -1;
+ this->ClosePending = true;
+ return false;
+ }
+ return this->DoConnect();
+ }
+ log(DEBUG,"No result for socket yet!");
+ return true;
+}
+
+bool InspSocket::DoConnect()
+{
+ log(DEBUG,"In DoConnect()");
+ if ((this->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
+ {
+ log(DEBUG,"Cant socket()");
+ this->state = I_ERROR;
+ this->OnError(I_ERR_SOCKET);
+ this->fd = -1;
+ return false;
+ }
+
+ log(DEBUG,"Part 2 DoConnect() %s",this->IP);
+ inet_aton(this->IP,&addy);
+ addr.sin_family = AF_INET;
+ addr.sin_addr = addy;
+ addr.sin_port = htons(this->port);
+
+ int flags;
+ flags = fcntl(this->fd, F_GETFL, 0);
+ fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
+
+ if (connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)) == -1)
+ {
+ if (errno != EINPROGRESS)
+ {
+ log(DEBUG,"Error connect() %d: %s",this->fd,strerror(errno));
+ this->OnError(I_ERR_CONNECT);
+ this->Close();
+ this->state = I_ERROR;
+ this->fd = -1;
+ this->ClosePending = true;
+ return false;
+ }
+ }
+ this->state = I_CONNECTING;
+ ServerInstance->SE->AddFd(this->fd,false,X_ESTAB_MODULE);
+ socket_ref[this->fd] = this;
+ this->SetQueues(this->fd);
+ log(DEBUG,"Returning true from InspSocket::DoConnect");
+ return true;
+}
+
+
+void InspSocket::Close()
+{
+ if (this->fd != -1)
+ {
+ this->OnClose();
+ shutdown(this->fd,2);
+ close(this->fd);
+ socket_ref[this->fd] = NULL;
+ this->ClosePending = true;
+ this->fd = -1;
+ }
+}
+
+std::string InspSocket::GetIP()
+{
+ return this->IP;
+}
+
+char* InspSocket::Read()
+{
+ if ((fd < 0) || (fd > MAX_DESCRIPTORS))
+ return NULL;
+ int n = recv(this->fd,this->ibuf,sizeof(this->ibuf),0);
+ if ((n > 0) && (n <= (int)sizeof(this->ibuf)))
+ {
+ ibuf[n] = 0;
+ return ibuf;
+ }
+ else
+ {
+ if (errno == EAGAIN)
+ {
+ return "";
+ }
+ else
+ {
+ log(DEBUG,"EOF or error on socket: %s",strerror(errno));
+ return NULL;
+ }
+ }
+}
+
+void InspSocket::MarkAsClosed()
+{
+ log(DEBUG,"Marked as closed");
+ this->ClosePending = true;
+}
+
+// There are two possible outcomes to this function.
+// It will either write all of the data, or an undefined amount.
+// If an undefined amount is written the connection has failed
+// and should be aborted.
+int InspSocket::Write(const std::string &data)
+{
+ if (this->ClosePending)
+ return false;
+
+ /*int result = write(this->fd,data.c_str(),data.length());
+ if (result < 1)
+ return false;
+ return true;*/
+
+ /* Try and append the data to the back of the queue, and send it on its way
+ */
+ outbuffer.push_back(data);
+ return (!this->FlushWriteBuffer());
+}
+
+bool InspSocket::FlushWriteBuffer()
+{
+ if (this->ClosePending)
+ return true;
+
+ if ((this->fd > -1) && (this->state == I_CONNECTED))
+ {
+ if (outbuffer.size())
+ {
+ int result = write(this->fd,outbuffer[0].c_str(),outbuffer[0].length());
+ if (result > 0)
+ {
+ if ((unsigned int)result == outbuffer[0].length())
+ {
+ /* The whole block was written (usually a line)
+ * Pop the block off the front of the queue
+ */
+ outbuffer.pop_front();
+ }
+ else
+ {
+ std::string temp = outbuffer[0].substr(result);
+ outbuffer[0] = temp;
+ }
+ }
+ else if ((result == -1) && (errno != EAGAIN))
+ {
+ log(DEBUG,"Write error on socket: %s",strerror(errno));
+ this->OnError(I_ERR_WRITE);
+ this->state = I_ERROR;
+ this->ClosePending = true;
+ return true;
+ }
+ }
+ }
+ return (fd < 0);
+}
+
+bool InspSocket::Timeout(time_t current)
+{
+ if (!socket_ref[this->fd] || !ServerInstance->SE->HasFd(this->fd))
+ {
+ log(DEBUG,"No FD or socket ref");
+ return false;
+ }
+
+ if (this->ClosePending)
+ {
+ log(DEBUG,"Close is pending");
+ return true;
+ }
+
+ if (((this->state == I_RESOLVING) || (this->state == I_CONNECTING)) && (current > timeout_end))
+ {
+ log(DEBUG,"Timed out, current=%lu timeout_end=%lu");
+ // for non-listening sockets, the timeout can occur
+ // which causes termination of the connection after
+ // the given number of seconds without a successful
+ // connection.
+ this->OnTimeout();
+ this->OnError(I_ERR_TIMEOUT);
+ timeout = true;
+ this->state = I_ERROR;
+ this->ClosePending = true;
+ return true;
+ }
+ return this->FlushWriteBuffer();
+}
+
+bool InspSocket::Poll()
+{
+ if (!socket_ref[this->fd] || !ServerInstance->SE->HasFd(this->fd))
+ return false;
+
+ int incoming = -1;
+ bool n = true;
+
+ if ((fd < 0) || (fd > MAX_DESCRIPTORS) || (this->ClosePending))
+ return false;
+
+ switch (this->state)
+ {
+ case I_RESOLVING:
+ log(DEBUG,"State = I_RESOLVING, calling DoResolve()");
+ return this->DoResolve();
+ break;
+ case I_CONNECTING:
+ log(DEBUG,"State = I_CONNECTING");
+ this->SetState(I_CONNECTED);
+ /* Our socket was in write-state, so delete it and re-add it
+ * in read-state.
+ */
+ ServerInstance->SE->DelFd(this->fd);
+ ServerInstance->SE->AddFd(this->fd,true,X_ESTAB_MODULE);
+ return this->OnConnected();
+ break;
+ case I_LISTENING:
+ length = sizeof (client);
+ incoming = accept (this->fd, (sockaddr*)&client,&length);
+ this->SetQueues(incoming);
+ this->OnIncomingConnection(incoming,inet_ntoa(client.sin_addr));
+ return true;
+ break;
+ case I_CONNECTED:
+ n = this->OnDataReady();
+ /* Flush any pending, but not till after theyre done with the event
+ * so there are less write calls involved.
+ * Both FlushWriteBuffer AND the return result of OnDataReady must
+ * return true for this to be ok.
+ */
+ if (this->FlushWriteBuffer())
+ return false;
+ return n;
+ break;
+ default:
+ break;
+ }
+ return true;
+}
+
+void InspSocket::SetState(InspSocketState s)
+{
+ log(DEBUG,"Socket state change");
+ this->state = s;
+}
+
+InspSocketState InspSocket::GetState()
+{
+ return this->state;
+}
+
+int InspSocket::GetFd()
+{
+ return this->fd;
+}
+
+bool InspSocket::OnConnected() { return true; }
+void InspSocket::OnError(InspSocketError e) { return; }
+int InspSocket::OnDisconnect() { return 0; }
+int InspSocket::OnIncomingConnection(int newfd, char* ip) { return 0; }
+bool InspSocket::OnDataReady() { return true; }
+void InspSocket::OnTimeout() { return; }
+void InspSocket::OnClose() { return; }
+
+InspSocket::~InspSocket()
+{
+ this->Close();
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 15:39:11 +0000