+/* +------------------------------------+
+ * | Inspire Internet Relay Chat Daemon |
+ * +------------------------------------+
+ *
+ * Inspire is copyright (C) 2002-2004 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 <connection.h>
#include <unistd.h>
#include <fcntl.h>
+#include <poll.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/utsname.h>
#include <vector>
#include <string>
#include <deque>
+#include <sstream>
#include "inspircd.h"
#include "modules.h"
+#include "inspstring.h"
+#include "helperfuncs.h"
using namespace std;
+
extern std::vector<Module*> modules;
extern std::vector<ircd_module*> factory;
+std::deque<std::string> xsums;
+
extern int MODCOUNT;
+extern time_t TIME;
+
+
+/**
+ * The InspIRCd mesh network is maintained by a tree of objects which reference *themselves*.
+ * Every local server has an array of 32 *serverrecs, known as me[]. Each of these represents
+ * a local listening port, and is not null if the user has opened a listening port on the server.
+ * It is assumed nobody will ever want to open more than 32 listening server ports at any one
+ * time (i mean come on, why would you want more, the ircd works fine with ONE).
+ * Each me[] entry has multiple classes within it of type ircd_connector. These are stored in a vector
+ * and each represents a server linked via this socket. If the connection was created outbound,
+ * the connection is bound to the default ip address by using me[defaultRoute] (defaultRoute being
+ * a global variable which indicates the default server to make connections on). If the connection
+ * was created inbound, it is attached to the port the connection came in on. There may be as many
+ * ircd_connector objects as needed in each me[] entry. Each ircd_connector implements the specifics
+ * of an ircd connection in the mesh, however each ircd may have multiple ircd_connector connections
+ * to it, to maintain the mesh link.
+ */
+
+char* xsumtable = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+// creates a random id for a line for detection of duplicate messages
+std::string CreateSum()
+{
+ char sum[9];
+ sum[0] = ':';
+ sum[8] = '\0';
+ for(int q = 1; q < 8; q++)
+ sum[q] = xsumtable[rand()%52];
+ return sum;
+}
+
connection::connection()
{
fd = 0;
}
-bool connection::CreateListener(char* host, int p)
+bool connection::CreateListener(char* newhost, int p)
{
sockaddr_in host_address;
int flags;
return false;
}
+ setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,(const char*)&on,sizeof(on));
+ linger.l_onoff = 1;
+ linger.l_linger = 1;
+ setsockopt(fd,SOL_SOCKET,SO_LINGER,(const char*)&linger,sizeof(linger));
+
+ // attempt to increase socket sendq and recvq as high as its possible
+ // to get them on linux.
+ int sendbuf = 32768;
+ int recvbuf = 32768;
+ setsockopt(fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
+ setsockopt(fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
+
memset((void*)&host_address, 0, sizeof(host_address));
host_address.sin_family = AF_INET;
- if (!strcmp(host,""))
+ if (!strcmp(newhost,""))
{
host_address.sin_addr.s_addr = htonl(INADDR_ANY);
}
else
{
- inet_aton(host,&addy);
+ inet_aton(newhost,&addy);
host_address.sin_addr = addy;
}
this->port = p;
- setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,(const char*)&on,sizeof(on));
- linger.l_onoff = 1;
- linger.l_linger = 0;
- setsockopt(fd,SOL_SOCKET,SO_LINGER,(const char*)&linger,sizeof(linger));
-
- // attempt to increase socket sendq and recvq as high as its possible
- // to get them on linux.
- int sendbuf = 32768;
- int recvbuf = 32768;
- setsockopt(fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
- setsockopt(fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
-
listen(this->fd,5);
return true;
return this->port;
}
-bool ircd_connector::SetHostAndPort(char* host, int port)
+bool ircd_connector::SetHostAndPort(char* newhost, int newport)
{
- strncpy(this->host,host,160);
- this->port = port;
+ strncpy(this->host,newhost,160);
+ this->port = newport;
return true;
}
-bool ircd_connector::SetHostAddress(char* host, int port)
+bool ircd_connector::SetHostAddress(char* newhost, int newport)
{
- strncpy(this->host,host,160);
- this->port = port;
+ strncpy(this->host,newhost,160);
+ this->port = newport;
memset((void*)&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
inet_aton(host,&addr.sin_addr);
this->port = p;
}
-bool ircd_connector::MakeOutboundConnection(char* host, int port)
+void ircd_connector::AddBuffer(std::string a)
+{
+ std::string b = "";
+ for (int i = 0; i < a.length(); i++)
+ if (a[i] != '\r')
+ b = b + a[i];
+
+ std::stringstream stream(ircdbuffer);
+ stream << b;
+ log(DEBUG,"AddBuffer: %s",b.c_str());
+ ircdbuffer = stream.str();
+}
+
+bool ircd_connector::BufferIsComplete()
+{
+ for (int i = 0; i < ircdbuffer.length(); i++)
+ if (ircdbuffer[i] == '\n')
+ return true;
+ return false;
+}
+
+void ircd_connector::ClearBuffer()
+{
+ ircdbuffer = "";
+}
+
+std::string ircd_connector::GetBuffer()
+{
+ // Fix by Brain 28th Apr 2005
+ // seems my stringstream code isnt liked by linux
+ // EVEN THOUGH IT IS CORRECT! Fixed by using a different
+ // (SLOWER) algorithm...
+ char* line = (char*)ircdbuffer.c_str();
+ std::string ret = "";
+ while ((*line != '\n') && (strlen(line)))
+ {
+ ret = ret + *line;
+ line++;
+ }
+ if ((*line == '\n') || (*line == '\r'))
+ line++;
+ ircdbuffer = line;
+ return ret;
+}
+
+bool ircd_connector::MakeOutboundConnection(char* newhost, int newport)
{
- log(DEBUG,"MakeOutboundConnection: Original param: %s",host);
- hostent* hoste = gethostbyname(host);
+ log(DEBUG,"MakeOutboundConnection: Original param: %s",newhost);
+ ClearBuffer();
+ hostent* hoste = gethostbyname(newhost);
if (!hoste)
{
- log(DEBUG,"MakeOutboundConnection: gethostbyname was NULL, setting %s",host);
- this->SetHostAddress(host,port);
- SetHostAndPort(host,port);
+ log(DEBUG,"MakeOutboundConnection: gethostbyname was NULL, setting %s",newhost);
+ this->SetHostAddress(newhost,newport);
+ SetHostAndPort(newhost,newport);
}
else
{
struct in_addr* ia = (in_addr*)hoste->h_addr;
log(DEBUG,"MakeOutboundConnection: gethostbyname was valid, setting %s",inet_ntoa(*ia));
- this->SetHostAddress(inet_ntoa(*ia),port);
- SetHostAndPort(inet_ntoa(*ia),port);
+ this->SetHostAddress(inet_ntoa(*ia),newport);
+ SetHostAndPort(inet_ntoa(*ia),newport);
}
this->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)))
{
WriteOpers("connect() failed for %s",host);
+ RemoveServer(this->servername.c_str());
return false;
}
int flags = fcntl(this->fd, F_GETFL, 0);
else
{
WriteOpers("socket() failed!");
+ RemoveServer(this->servername.c_str());
}
return false;
}
-bool connection::BeginLink(char* targethost, int port, char* password, char* servername, int myport)
+bool connection::BeginLink(char* targethost, int newport, char* password, char* servername, int myport)
{
char connect[MAXBUF];
ircd_connector connector;
+ ircd_connector *cn = this->FindHost(servername);
+
+
+ if (cn)
+ {
+ WriteOpers("CONNECT aborted: Server %s already exists",servername);
+ return false;
+ }
+
if (this->fd)
{
- if (connector.MakeOutboundConnection(targethost,port))
+ if (connector.MakeOutboundConnection(targethost,newport))
{
// targethost has been turned into an ip...
// we dont want this as the server name.
connector.SetServerName(servername);
- sprintf(connect,"S %s %s %d %d :%s",getservername().c_str(),password,myport,GetRevision(),getserverdesc().c_str());
+ snprintf(connect,MAXBUF,"S %s %s %lu %lu :%s",getservername().c_str(),password,(unsigned long)myport,(unsigned long)GetRevision(),getserverdesc().c_str());
connector.SetState(STATE_NOAUTH_OUTBOUND);
- connector.SetHostAndPort(targethost, port);
+ connector.SetHostAndPort(targethost, newport);
this->connectors.push_back(connector);
return this->SendPacket(connect, servername);
}
else
{
connector.SetState(STATE_DISCONNECTED);
- WriteOpers("Could not create outbound connection to %s:%d",targethost,port);
+ WriteOpers("Could not create outbound connection to %s:%d",targethost,newport);
}
}
return false;
}
-bool connection::MeshCookie(char* targethost, int port, long cookie, char* servername)
+void ircd_connector::SetVersionString(std::string newversion)
+{
+ log(DEBUG,"Set version of %s to %s",this->servername.c_str(),newversion.c_str());
+ this->version = newversion;
+}
+
+std::string ircd_connector::GetVersionString()
+{
+ return this->version;
+}
+
+bool connection::MeshCookie(char* targethost, int newport, unsigned long cookie, char* servername)
{
char connect[MAXBUF];
ircd_connector connector;
- WriteOpers("Establishing meshed link to %s:%d",servername,port);
+ WriteOpers("Establishing meshed link to %s:%d",servername,newport);
if (this->fd)
{
- if (connector.MakeOutboundConnection(targethost,port))
+ if (connector.MakeOutboundConnection(targethost,newport))
{
// targethost has been turned into an ip...
// we dont want this as the server name.
connector.SetServerName(servername);
- sprintf(connect,"- %d %s :%s",cookie,getservername().c_str(),getserverdesc().c_str());
+ snprintf(connect,MAXBUF,"- %lu %s :%s",cookie,getservername().c_str(),getserverdesc().c_str());
connector.SetState(STATE_NOAUTH_OUTBOUND);
- connector.SetHostAndPort(targethost, port);
+ connector.SetHostAndPort(targethost, newport);
connector.SetState(STATE_CONNECTED);
this->connectors.push_back(connector);
return this->SendPacket(connect, servername);
else
{
connector.SetState(STATE_DISCONNECTED);
- WriteOpers("Could not create outbound connection to %s:%d",targethost,port);
+ WriteOpers("Could not create outbound connection to %s:%d",targethost,newport);
}
}
return false;
}
-bool connection::AddIncoming(int fd, char* targethost, int sourceport)
+bool connection::AddIncoming(int newfd, char* targethost, int sourceport)
{
- char connect[MAXBUF];
-
ircd_connector connector;
// targethost has been turned into an ip...
// we dont want this as the server name.
connector.SetServerName(targethost);
- connector.SetDescriptor(fd);
+ connector.SetDescriptor(newfd);
connector.SetState(STATE_NOAUTH_INBOUND);
- int flags = fcntl(fd, F_GETFL, 0);
- fcntl(fd, F_SETFL, flags | O_NONBLOCK);
+ int flags = fcntl(newfd, F_GETFL, 0);
+ fcntl(newfd, F_SETFL, flags | O_NONBLOCK);
int sendbuf = 32768;
int recvbuf = 32768;
- setsockopt(fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
- setsockopt(fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
+ setsockopt(newfd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
+ setsockopt(newfd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
connector.SetHostAndPort(targethost, sourceport);
connector.SetState(STATE_NOAUTH_INBOUND);
log(DEBUG,"connection::AddIncoming() Added connection: %s:%d",targethost,sourceport);
// Returns a pointer to the connector for 'host'
-ircd_connector* connection::FindHost(std::string host)
+ircd_connector* connection::FindHost(std::string findhost)
{
for (int i = 0; i < this->connectors.size(); i++)
{
- if (this->connectors[i].GetServerName() == host)
+ if (this->connectors[i].GetServerName() == findhost)
{
return &this->connectors[i];
}
}
-void ircd_connector::SetState(int state)
+void ircd_connector::SetState(int newstate)
{
- this->state = state;
+ this->state = newstate;
if (state == STATE_DISCONNECTED)
{
NetSendMyRoutingTable();
fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
}
-void ircd_connector::SetDescriptor(int fd)
+void ircd_connector::SetDescriptor(int newfd)
{
- this->fd = fd;
+ this->fd = newfd;
}
-bool connection::SendPacket(char *message, const char* host)
+bool connection::SendPacket(char *message, const char* sendhost)
{
- ircd_connector* cn = this->FindHost(host);
+ if ((!message) || (!sendhost))
+ return true;
+
+ ircd_connector* cn = this->FindHost(sendhost);
if (!strchr(message,'\n'))
{
- strncat(message,"\n",MAXBUF);
+ strlcat(message,"\n",MAXBUF);
}
if (cn)
if (cn->GetState() == STATE_DISCONNECTED)
{
- log(DEBUG,"Main route to %s is down, seeking alternative",host);
- // this route is down, we must re-route the packet through an available point in the mesh.
- for (int k = 0; k < this->connectors.size(); k++)
+ log(DEBUG,"\n\n\n\nMain route to %s is down, seeking alternative\n\n\n\n",sendhost);
+ // fix: can only route one hop to avoid a loop
+ if (strncmp(message,"R ",2))
{
- // search for another point in the mesh which can 'reach' where we want to go
- for (int m = 0; m < this->connectors[k].routes.size(); m++)
+ log(DEBUG,"Not a double reroute");
+ // this route is down, we must re-route the packet through an available point in the mesh.
+ for (int k = 0; k < this->connectors.size(); k++)
{
- if (!strcasecmp(this->connectors[k].routes[m].c_str(),host))
+ log(DEBUG,"Check connector %d: %s",k,this->connectors[k].GetServerName().c_str());
+ // search for another point in the mesh which can 'reach' where we want to go
+ for (int m = 0; m < this->connectors[k].routes.size(); m++)
{
- log(DEBUG,"Found alternative route for packet: %s",this->connectors[k].GetServerName().c_str());
- char buffer[MAXBUF];
- snprintf(buffer,MAXBUF,"R %s %s",host,message);
- this->SendPacket(buffer,this->connectors[k].GetServerName().c_str());
- return true;
+ log(DEBUG,"Check connector %d: %s route %s",k,this->connectors[k].GetServerName().c_str(),this->connectors[k].routes[m].c_str());
+ if (!strcasecmp(this->connectors[k].routes[m].c_str(),sendhost))
+ {
+ log(DEBUG,"Found alternative route for packet: %s",this->connectors[k].GetServerName().c_str());
+ char buffer[MAXBUF];
+ snprintf(buffer,MAXBUF,"R %s %s",sendhost,message);
+ this->SendPacket(buffer,this->connectors[k].GetServerName().c_str());
+ return true;
+ }
}
}
}
char buffer[MAXBUF];
- snprintf(buffer,MAXBUF,"& %s",host);
- NetSendToAllExcept(host,buffer);
- log(DEBUG,"There are no routes to %s, we're gonna boot the server off!",host);
- DoSplit(host);
+ snprintf(buffer,MAXBUF,"& %s",sendhost);
+ NetSendToAllExcept(sendhost,buffer);
+ log(DEBUG,"\n\nThere are no routes to %s, we're gonna boot the server off!\n\n",sendhost);
+ DoSplit(sendhost);
return false;
}
cn->CloseConnection();
cn->SetState(STATE_DISCONNECTED);
// retry the packet along a new route so either arrival OR failure are gauranteed (bugfix)
- this->SendPacket(message,host);
- return false;
+ return this->SendPacket(message,sendhost);
}
return true;
}
}
+bool already_have_sum(std::string sum)
+{
+ for (int i = 0; i < xsums.size(); i++)
+ {
+ if (xsums[i] == sum)
+ {
+ return true;
+ }
+ }
+ if (xsums.size() >= 128)
+ {
+ xsums.pop_front();
+ }
+ xsums.push_back(sum);
+ return false;
+}
+
// receives a packet from any where there is data waiting, first come, first served
// fills the message and host values with the host where the data came from.
-bool connection::RecvPacket(std::deque<std::string> &messages, char* host)
+bool connection::RecvPacket(std::deque<std::string> &messages, char* recvhost,std::deque<std::string> &sums)
{
- char data[32767];
- memset(data, 0, 32767);
+ char data[65536];
+ memset(data, 0, 65536);
for (int i = 0; i < this->connectors.size(); i++)
{
if (this->connectors[i].GetState() != STATE_DISCONNECTED)
{
// returns false if the packet could not be sent (e.g. target host down)
int rcvsize = 0;
- rcvsize = recv(this->connectors[i].GetDescriptor(),data,32767,0);
+
+ // check if theres any data on this socket
+ // if not, continue onwards to the next.
+ pollfd polls;
+ polls.fd = this->connectors[i].GetDescriptor();
+ polls.events = POLLIN;
+ int ret = poll(&polls,1,1);
+ if (ret <= 0) continue;
+
+ rcvsize = recv(this->connectors[i].GetDescriptor(),data,65000,0);
+ data[rcvsize] = '\0';
if (rcvsize == -1)
{
if (errno != EAGAIN)
this->connectors[i].SetState(STATE_DISCONNECTED);
}
}
+ int pushed = 0;
if (rcvsize > 0)
{
- char* l = strtok(data,"\n");
- while (l)
+ this->connectors[i].AddBuffer(data);
+ if (this->connectors[i].BufferIsComplete())
{
- char sanitized[32767];
- memset(sanitized, 0, 32767);
- int ptt = 0;
- for (int pt = 0; pt < strlen(l); pt++)
+ while (this->connectors[i].BufferIsComplete())
{
- if (l[pt] != '\r')
+ std::string text = this->connectors[i].GetBuffer();
+ if (text != "")
{
- sanitized[ptt++] = l[pt];
+ if ((text[0] == ':') && (text.find(" ") != std::string::npos))
+ {
+ std::string orig = text;
+ log(DEBUG,"Original: %s",text.c_str());
+ std::string sum = text.substr(1,text.find(" ")-1);
+ text = text.substr(text.find(" ")+1,text.length());
+ std::string possible_token = text.substr(1,text.find(" ")-1);
+ if (possible_token.length() > 1)
+ {
+ sums.push_back("*");
+ text = orig;
+ log(DEBUG,"Non-mesh, non-tokenized string passed up the chain");
+ }
+ else
+ {
+ log(DEBUG,"Packet sum: '%s'",sum.c_str());
+ if ((already_have_sum(sum)) && (sum != "*"))
+ {
+ // we don't accept dupes
+ log(DEBUG,"Duplicate packet sum %s from server %s dropped",sum.c_str(),this->connectors[i].GetServerName().c_str());
+ continue;
+ }
+ sums.push_back(sum.c_str());
+ }
+ }
+ else sums.push_back("*");
+ messages.push_back(text.c_str());
+ strlcpy(recvhost,this->connectors[i].GetServerName().c_str(),160);
+ log(DEBUG,"Connection::RecvPacket() %d:%s->%s",pushed++,recvhost,text.c_str());
}
}
- sanitized[ptt] = '\0';
- if (strlen(sanitized))
- {
- messages.push_back(sanitized);
- strncpy(host,this->connectors[i].GetServerName().c_str(),160);
- log(DEBUG,"main: Connection::RecvPacket() got '%s' from %s",sanitized,host);
-
- }
- l = strtok(NULL,"\n");
+ return true;
}
- return true;
}
}
}
return false;
}
-long connection::GenKey()
-{
- srand(time(NULL));
- return (random()*time(NULL));
-}
-
projects / user / henk / code / inspircd.git / blobdiff