serverrec Class Reference

A class that defines the local server or a remote server. More...

#include <servers.h>

Inheritance diagram for serverrec:

[legend]Collaboration diagram for serverrec:

[legend]List of all members.

Public Member Functions
	serverrec ()
	Constructor.
	serverrec (char *n, long ver, bool jupe)
	Constructor which initialises some of the main variables.
	~serverrec ()
	Destructor.
bool	CreateListener (char *host, int p)
	Create a listening socket on 'host' using port number 'p'.
bool	BeginLink (char *targethost, int port, char *password, char *servername, int myport)
	Begin an outbound link to another ircd at targethost.
bool	MeshCookie (char *targethost, int port, unsigned long cookie, char *servername)
	Begin an outbound mesh link to another ircd on a network you are already an authenticated member of.
void	TerminateLink (char *targethost)
	Terminate a link to 'targethost' by calling the ircd_connector::CloseConnection method.
bool	SendPacket (char *message, const char *host)
	Send a message to a server by name, if the server is unavailable directly route the packet via another server If the server still cannot be reached after attempting to route the message remotely, returns false.
bool	RecvPacket (std::deque< std::string > &messages, char *host, std::deque< std::string > &sums)
	Returns the next available packet and returns true if data is available.
ircd_connector *	FindHost (std::string host)
	Find the ircd_connector oject related to a certain servername given in 'host'.
bool	AddIncoming (int fd, char *targethost, int sourceport)
	Add an incoming connection to the connection pool.
void	FlushWriteBuffers ()
	Flushes all data waiting to be written for all of this server's connections.
Public Attributes
char	name [MAXBUF]
	server name
long	pingtime
	last ping response (ms)
long	usercount_i
	invisible users on server
long	usercount
	non-invisible users on server
long	opercount
	opers on server
int	hops_away
	number of hops away (for quick access)
long	version
	ircd version
bool	jupiter
	is a JUPE server (faked to enforce a server ban)
char	description [MAXBUF]
	Description of the server.
char	nickserv [NICKMAX]
	Holds nickserv's name on U:lined (services) servers (this is a kludge for ircservices which ASSUMES things :/).
bool	sync_soon
std::vector< ircd_connector >	connectors
	With a serverrec, this is a list of all established server connections.

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Detailed Description

A class that defines the local server or a remote server.

Definition at line 30 of file servers.h.

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Constructor & Destructor Documentation

serverrec::serverrec (   )

Constructor. Definition at line 46 of file servers.cpp. References connectors, connection::fd, hops_away, jupiter, connection::lastping, name, nickserv, opercount, pingtime, connection::signon, sync_soon, TIME, usercount, usercount_i, and version. { strlcpy(name,"",256); pingtime = 0; lastping = TIME; usercount_i = usercount = opercount = version = 0; hops_away = 1; signon = TIME; jupiter = false; fd = 0; sync_soon = false; strlcpy(nickserv,"",NICKMAX); connectors.clear(); }

serverrec::serverrec (  char *  n, long  ver, bool  jupe )

Constructor which initialises some of the main variables. Definition at line 66 of file servers.cpp. References connectors, connection::fd, hops_away, jupiter, connection::lastping, name, nickserv, opercount, connection::signon, sync_soon, TIME, usercount, usercount_i, and version. { strlcpy(name,n,256); lastping = TIME; usercount_i = usercount = opercount = 0; version = ver; hops_away = 1; signon = TIME; jupiter = jupe; fd = 0; sync_soon = false; strlcpy(nickserv,"",NICKMAX); connectors.clear(); }

serverrec::~serverrec (   )

Destructor. Definition at line 62 of file servers.cpp. { }

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Member Function Documentation

bool serverrec::AddIncoming (  int  fd, char *  targethost, int  sourceport )

Add an incoming connection to the connection pool. (reserved for core use) Definition at line 212 of file servers.cpp. References connectors, DEBUG, ircd_connector::SetDescriptor(), ircd_connector::SetHostAndPort(), ircd_connector::SetServerName(), ircd_connector::SetState(), and STATE_NOAUTH_INBOUND. { ircd_connector connector; // targethost has been turned into an ip... // we dont want this as the server name. connector.SetServerName(targethost); connector.SetDescriptor(newfd); connector.SetState(STATE_NOAUTH_INBOUND); int flags = fcntl(newfd, F_GETFL, 0); fcntl(newfd, F_SETFL, flags | O_NONBLOCK); int sendbuf = 32768; int recvbuf = 32768; 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,"serverrec::AddIncoming() Added connection: %s:%d",targethost,sourceport); this->connectors.push_back(connector); return true; }

bool serverrec::BeginLink (  char *  targethost, int  port, char *  password, char *  servername, int  myport )

Begin an outbound link to another ircd at targethost. Definition at line 142 of file servers.cpp. References connectors, connection::fd, FindHost(), ircd_connector::MakeOutboundConnection(), SendPacket(), ircd_connector::SetHostAndPort(), ircd_connector::SetServerName(), ircd_connector::SetState(), STATE_DISCONNECTED, and STATE_NOAUTH_OUTBOUND. { 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,newport)) { // targethost has been turned into an ip... // we dont want this as the server name. connector.SetServerName(servername); snprintf(connect,MAXBUF,"S %s %s %lu %s :%s",getservername().c_str(),password,(unsigned long)myport,GetRevision().c_str(),getserverdesc().c_str()); connector.SetState(STATE_NOAUTH_OUTBOUND); connector.SetHostAndPort(targethost, newport); this->connectors.push_back(connector); // this packet isn't actually sent until the socket connects -- the STATE_NOAUTH_OUTBOUND state // queues outbound data until the socket is polled as writeable (e.g. the connection is established) return this->SendPacket(connect, servername); } else { connector.SetState(STATE_DISCONNECTED); WriteOpers("Could not create outbound connection to %s:%d",targethost,newport); } } return false; }

bool serverrec::CreateListener (  char *  host, int  p )

Create a listening socket on 'host' using port number 'p'. Definition at line 81 of file servers.cpp. References connection::fd, MaxConn, and connection::port. { sockaddr_in host_address; int flags; in_addr addy; int on = 0; struct linger linger = { 0 }; this->port = p; fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (fd <= 0) { 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(newhost,"")) { host_address.sin_addr.s_addr = htonl(INADDR_ANY); } else { inet_aton(newhost,&addy); host_address.sin_addr = addy; } host_address.sin_port = htons(p); if (bind(fd,(sockaddr*)&host_address,sizeof(host_address))<0) { return false; } // make the socket non-blocking flags = fcntl(fd, F_GETFL, 0); fcntl(fd, F_SETFL, flags | O_NONBLOCK); this->port = p; listen(this->fd, MaxConn); return true; }

ircd_connector * serverrec::FindHost (  std::string  host  )

Find the ircd_connector oject related to a certain servername given in 'host'. Definition at line 242 of file servers.cpp. References connectors. Referenced by BeginLink(), and SendPacket(). { for (int i = 0; i < this->connectors.size(); i++) { if (this->connectors[i].GetServerName() == findhost) { return &this->connectors[i]; } } return NULL; }

void serverrec::FlushWriteBuffers (   )

Flushes all data waiting to be written for all of this server's connections. Definition at line 274 of file servers.cpp. References connectors, has_been_netsplit, IsRoutable(), STATE_DISCONNECTED, STATE_NOAUTH_INBOUND, STATE_NOAUTH_OUTBOUND, and TIME. { char buffer[MAXBUF]; for (int i = 0; i < this->connectors.size(); i++) { // don't try and ping a NOAUTH_OUTBOUND state, its not authed yet! if ((this->connectors[i].GetState() == STATE_NOAUTH_OUTBOUND) && (TIME > this->connectors[i].age+30)) { // however if we reach this timer its connected timed out :) WriteOpers("*** Connection to %s timed out",this->connectors[i].GetServerName().c_str()); snprintf(buffer,MAXBUF,"& %s",this->connectors[i].GetServerName().c_str()); NetSendToAllExcept(this->connectors[i].GetServerName().c_str(),buffer); DoSplit(this->connectors[i].GetServerName().c_str()); return; } if ((this->connectors[i].GetState() == STATE_NOAUTH_INBOUND) && (TIME > this->connectors[i].age+30)) { WriteOpers("*** Connection from %s timed out",this->connectors[i].GetServerName().c_str()); snprintf(buffer,MAXBUF,"& %s",this->connectors[i].GetServerName().c_str()); NetSendToAllExcept(this->connectors[i].GetServerName().c_str(),buffer); DoSplit(this->connectors[i].GetServerName().c_str()); return; } if (this->connectors[i].GetState() != STATE_DISCONNECTED) { if (!this->connectors[i].CheckPing()) { WriteOpers("*** Lost single connection to %s: Ping timeout",this->connectors[i].GetServerName().c_str()); this->connectors[i].CloseConnection(); this->connectors[i].SetState(STATE_DISCONNECTED); if (!IsRoutable(this->connectors[i].GetServerName())) { WriteOpers("*** Server %s is no longer routable, disconnecting.",this->connectors[i].GetServerName().c_str()); snprintf(buffer,MAXBUF,"& %s",this->connectors[i].GetServerName().c_str()); NetSendToAllExcept(this->connectors[i].GetServerName().c_str(),buffer); DoSplit(this->connectors[i].GetServerName().c_str()); } has_been_netsplit = true; } } if ((this->connectors[i].GetWriteError() !="") && (this->connectors[i].GetState() != STATE_DISCONNECTED)) { // if we're here the write() caused an error, we cannot proceed WriteOpers("*** Lost single connection to %s, link inactive and retrying: %s",this->connectors[i].GetServerName().c_str(),this->connectors[i].GetWriteError().c_str()); this->connectors[i].CloseConnection(); this->connectors[i].SetState(STATE_DISCONNECTED); if (!IsRoutable(this->connectors[i].GetServerName())) { WriteOpers("*** Server %s is no longer routable, disconnecting.",this->connectors[i].GetServerName().c_str()); snprintf(buffer,MAXBUF,"& %s",this->connectors[i].GetServerName().c_str()); NetSendToAllExcept(this->connectors[i].GetServerName().c_str(),buffer); DoSplit(this->connectors[i].GetServerName().c_str()); } has_been_netsplit = true; } if ((this->connectors[i].HasBufferedOutput()) && (this->connectors[i].GetState() != STATE_DISCONNECTED)) { if (!this->connectors[i].FlushWriteBuf()) { // if we're here the write() caused an error, we cannot proceed WriteOpers("*** Lost single connection to %s, link inactive and retrying: %s",this->connectors[i].GetServerName().c_str(),this->connectors[i].GetWriteError().c_str()); this->connectors[i].CloseConnection(); this->connectors[i].SetState(STATE_DISCONNECTED); if (!IsRoutable(this->connectors[i].GetServerName())) { WriteOpers("*** Server %s is no longer routable, disconnecting.",this->connectors[i].GetServerName().c_str()); snprintf(buffer,MAXBUF,"& %s",this->connectors[i].GetServerName().c_str()); NetSendToAllExcept(this->connectors[i].GetServerName().c_str(),buffer); DoSplit(this->connectors[i].GetServerName().c_str()); } has_been_netsplit = true; } } } }

bool serverrec::MeshCookie (  char *  targethost, int  port, unsigned long  cookie, char *  servername )

Begin an outbound mesh link to another ircd on a network you are already an authenticated member of. Definition at line 182 of file servers.cpp. References connectors, connection::fd, ircd_connector::MakeOutboundConnection(), SendPacket(), ircd_connector::SetHostAndPort(), ircd_connector::SetServerName(), ircd_connector::SetState(), STATE_DISCONNECTED, and STATE_NOAUTH_OUTBOUND. { char connect[MAXBUF]; ircd_connector connector; WriteOpers("Establishing meshed link to %s:%d",servername,newport); if (this->fd) { if (connector.MakeOutboundConnection(targethost,newport)) { // targethost has been turned into an ip... // we dont want this as the server name. connector.SetServerName(servername); snprintf(connect,MAXBUF,"- %lu %s :%s",cookie,getservername().c_str(),getserverdesc().c_str()); connector.SetState(STATE_NOAUTH_OUTBOUND); 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,newport); } } return false; }

bool serverrec::RecvPacket (  std::deque< std::string > &  messages, char *  host, std::deque< std::string > &  sums )

Returns the next available packet and returns true if data is available. Writes the servername the data came from to 'host'. If no data is available this function returns false. This function will automatically close broken links and reroute pathways, generating split messages on the network. Definition at line 445 of file servers.cpp. References already_have_sum(), connectors, DEBUG, has_been_netsplit, IsRoutable(), and STATE_DISCONNECTED. { char data[65536],buffer[MAXBUF]; 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; // 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 == 0) { log(DEBUG,"recv() failed for serverrec::RecvPacket(): EOF"); log(DEBUG,"Disabling connector: %s",this->connectors[i].GetServerName().c_str()); this->connectors[i].CloseConnection(); this->connectors[i].SetState(STATE_DISCONNECTED); if (!IsRoutable(this->connectors[i].GetServerName())) { WriteOpers("*** Server %s is no longer routable, disconnecting (EOF)",this->connectors[i].GetServerName().c_str()); snprintf(buffer,MAXBUF,"& %s",this->connectors[i].GetServerName().c_str()); NetSendToAllExcept(this->connectors[i].GetServerName().c_str(),buffer); DoSplit(this->connectors[i].GetServerName().c_str()); } has_been_netsplit = true; } if (rcvsize == -1) { if (errno != EAGAIN) { log(DEBUG,"recv() failed for serverrec::RecvPacket(): %s",strerror(errno)); log(DEBUG,"Disabling connector: %s",this->connectors[i].GetServerName().c_str()); this->connectors[i].CloseConnection(); this->connectors[i].SetState(STATE_DISCONNECTED); if (!IsRoutable(this->connectors[i].GetServerName())) { WriteOpers("*** Server %s is no longer routable, disconnecting.",this->connectors[i].GetServerName().c_str()); snprintf(buffer,MAXBUF,"& %s",this->connectors[i].GetServerName().c_str()); NetSendToAllExcept(this->connectors[i].GetServerName().c_str(),buffer); DoSplit(this->connectors[i].GetServerName().c_str()); } has_been_netsplit = true; } } int pushed = 0; if (rcvsize > 0) { if (!this->connectors[i].AddBuffer(data)) { WriteOpers("*** Read buffer for %s exceeds maximum, closing connection!",this->connectors[i].GetServerName().c_str()); this->connectors[i].CloseConnection(); this->connectors[i].SetState(STATE_DISCONNECTED); if (!IsRoutable(this->connectors[i].GetServerName())) { WriteOpers("*** Server %s is no longer routable, disconnecting.",this->connectors[i].GetServerName().c_str()); snprintf(buffer,MAXBUF,"& %s",this->connectors[i].GetServerName().c_str()); NetSendToAllExcept(this->connectors[i].GetServerName().c_str(),buffer); DoSplit(this->connectors[i].GetServerName().c_str()); } has_been_netsplit = true; } if (this->connectors[i].BufferIsComplete()) { this->connectors[i].ResetPing(); while (this->connectors[i].BufferIsComplete()) { std::string text = this->connectors[i].GetBuffer(); if (text != "") { 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 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,"serverrec::RecvPacket() %d:%s->%s",pushed++,recvhost,text.c_str()); } } return true; } } } } // nothing new yet -- message and host will be undefined return false; }

bool serverrec::SendPacket (  char *  message, const char *  host )

Send a message to a server by name, if the server is unavailable directly route the packet via another server If the server still cannot be reached after attempting to route the message remotely, returns false. Definition at line 350 of file servers.cpp. References ircd_connector::AddWriteBuf(), ircd_connector::CloseConnection(), connectors, DEBUG, FindHost(), ircd_connector::FlushWriteBuf(), ircd_connector::GetServerName(), ircd_connector::GetState(), ircd_connector::GetWriteError(), ircd_connector::SetState(), and STATE_DISCONNECTED. Referenced by BeginLink(), and MeshCookie(). { if ((!message) || (!sendhost)) return true; ircd_connector* cn = this->FindHost(sendhost); if (!strchr(message,'\n')) { strlcat(message,"\n",MAXBUF); } if (cn) { log(DEBUG,"main: serverrec::SendPacket() sent '%s' to %s",message,cn->GetServerName().c_str()); if (cn->GetState() == STATE_DISCONNECTED) { // fix: can only route one hop to avoid a loop if (strncmp(message,"R ",2)) { 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++) { 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++) { 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",sendhost); WriteOpers("*** All connections to %s lost.",sendhost); NetSendToAllExcept(sendhost,buffer); DoSplit(sendhost); return false; } // returns false if the packet could not be sent (e.g. target host down) if (!cn->AddWriteBuf(message)) { // if we're here, there was an error pending, and the send cannot proceed log(DEBUG,"cn->AddWriteBuf() failed for serverrec::SendPacket(): %s",cn->GetWriteError().c_str()); log(DEBUG,"Disabling connector: %s",cn->GetServerName().c_str()); cn->CloseConnection(); cn->SetState(STATE_DISCONNECTED); WriteOpers("*** Lost single connection to %s, link inactive and retrying: %s",cn->GetServerName().c_str(),cn->GetWriteError().c_str()); // retry the packet along a new route so either arrival OR failure are gauranteed (bugfix) return this->SendPacket(message,sendhost); } if (!cn->FlushWriteBuf()) { // if we're here the write() caused an error, we cannot proceed log(DEBUG,"cn->FlushWriteBuf() failed for serverrec::SendPacket(): %s",cn->GetWriteError().c_str()); log(DEBUG,"Disabling connector: %s",cn->GetServerName().c_str()); cn->CloseConnection(); cn->SetState(STATE_DISCONNECTED); WriteOpers("*** Lost single connection to %s, link inactive and retrying: %s",cn->GetServerName().c_str(),cn->GetWriteError().c_str()); // retry the packet along a new route so either arrival OR failure are gauranteed return this->SendPacket(message,sendhost); } return true; } }

void serverrec::TerminateLink (  char *  targethost  )

Terminate a link to 'targethost' by calling the ircd_connector::CloseConnection method. Definition at line 234 of file servers.cpp. { // this locates the targethost in the serverrec::connectors vector of the class, // and terminates it by sending it an SQUIT token and closing its descriptor. // TerminateLink with a null string causes a terminate of ALL links }

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Member Data Documentation

std::vector<ircd_connector> serverrec::connectors

With a serverrec, this is a list of all established server connections. Definition at line 81 of file servers.h. Referenced by AddIncoming(), BeginLink(), FindHost(), FlushWriteBuffers(), IsRoutable(), MeshCookie(), RecvPacket(), SendPacket(), and serverrec().

char serverrec::description[MAXBUF]

Description of the server. Definition at line 61 of file servers.h.

int serverrec::hops_away

number of hops away (for quick access) Definition at line 51 of file servers.h. Referenced by serverrec().

bool serverrec::jupiter

is a JUPE server (faked to enforce a server ban) Definition at line 57 of file servers.h. Referenced by serverrec().

char serverrec::name[MAXBUF]

server name Definition at line 36 of file servers.h. Referenced by serverrec().

char serverrec::nickserv[NICKMAX]

Holds nickserv's name on U:lined (services) servers (this is a kludge for ircservices which ASSUMES things :/). Definition at line 65 of file servers.h. Referenced by serverrec().

long serverrec::opercount

opers on server Definition at line 48 of file servers.h. Referenced by serverrec().

long serverrec::pingtime

last ping response (ms) Definition at line 39 of file servers.h. Referenced by serverrec().

bool serverrec::sync_soon

Definition at line 67 of file servers.h. Referenced by serverrec().

long serverrec::usercount

non-invisible users on server Definition at line 45 of file servers.h. Referenced by serverrec().

long serverrec::usercount_i

invisible users on server Definition at line 42 of file servers.h. Referenced by serverrec().

long serverrec::version

ircd version Definition at line 54 of file servers.h. Referenced by serverrec().

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The documentation for this class was generated from the following files:

• servers.h
• servers.cpp

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