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|
/* +------------------------------------+
* | 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 <string>
#include "configreader.h"
#include "socket.h"
#include "inspircd.h"
#include "inspstring.h"
#include "helperfuncs.h"
#include "socketengine.h"
#include "message.h"
extern InspIRCd* ServerInstance;
extern ServerConfig* Config;
extern time_t TIME;
extern int openSockfd[MAX_DESCRIPTORS];
/** This will bind a socket to a port. It works for UDP/TCP.
* If a hostname is given to bind to, the function will first
* attempt to resolve the hostname, then bind to the IP the
* hostname resolves to. This is a blocking lookup blocking for
* a maximum of one second before it times out, using the DNS
* server specified in the configuration file.
*/
bool BindSocket(int sockfd, insp_sockaddr client, insp_sockaddr server, int port, char* addr)
{
memset(&server,0,sizeof(server));
insp_inaddr addy;
bool resolved = false;
char resolved_addr[128];
if (*addr == '*')
*addr = 0;
if (*addr && !inet_aton(addr,&addy))
{
/* If they gave a hostname, bind to the IP it resolves to */
if (CleanAndResolve(resolved_addr, addr, true))
{
inet_aton(resolved_addr,&addy);
log(DEFAULT,"Resolved binding '%s' -> '%s'",addr,resolved_addr);
server.sin_addr = addy;
resolved = true;
}
else
{
log(DEFAULT,"WARNING: Could not resolve '%s' to an IP for binding to on port %d",addr,port);
return false;
}
}
server.sin_family = AF_INET;
if (!resolved)
{
if (!*addr)
{
server.sin_addr.s_addr = htonl(INADDR_ANY);
}
else
{
server.sin_addr = addy;
}
}
server.sin_port = htons(port);
if (bind(sockfd,(struct sockaddr*)&server,sizeof(server)) < 0)
{
return false;
}
else
{
log(DEBUG,"Bound port %s:%d",*addr ? addr : "*",port);
if (listen(sockfd, Config->MaxConn) == -1)
{
log(DEFAULT,"ERROR in listen(): %s",strerror(errno));
return false;
}
else
{
NonBlocking(sockfd);
return true;
}
}
}
// Open a TCP Socket
int OpenTCPSocket()
{
int sockfd;
int on = 1;
struct linger linger = { 0 };
if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) < 0)
{
log(DEFAULT,"Error creating TCP socket: %s",strerror(errno));
return (ERROR);
}
else
{
setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
/* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
linger.l_onoff = 1;
linger.l_linger = 1;
setsockopt(sockfd, SOL_SOCKET, SO_LINGER, &linger,sizeof(linger));
return (sockfd);
}
}
bool HasPort(int port, char* addr)
{
for (int count = 0; count < ServerInstance->stats->BoundPortCount; count++)
{
if ((port == Config->ports[count]) && (!strcasecmp(Config->addrs[count],addr)))
{
return true;
}
}
return false;
}
int BindPorts(bool bail)
{
char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
insp_sockaddr client, server;
int clientportcount = 0;
int BoundPortCount = 0;
if (!bail)
{
int InitialPortCount = ServerInstance->stats->BoundPortCount;
log(DEBUG,"Initial port count: %d",InitialPortCount);
for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
{
Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF);
Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF);
Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF);
if (((!*Type) || (!strcmp(Type,"clients"))) && (!HasPort(atoi(configToken),Addr)))
{
// modules handle server bind types now
Config->ports[clientportcount+InitialPortCount] = atoi(configToken);
if (*Addr == '*')
*Addr = 0;
strlcpy(Config->addrs[clientportcount+InitialPortCount],Addr,256);
clientportcount++;
log(DEBUG,"NEW binding %s:%s [%s] from config",Addr,configToken, Type);
}
}
int PortCount = clientportcount;
if (PortCount)
{
for (int count = InitialPortCount; count < InitialPortCount + PortCount; count++)
{
if ((openSockfd[count] = OpenTCPSocket()) == ERROR)
{
log(DEBUG,"Bad fd %d binding port [%s:%d]",openSockfd[count],Config->addrs[count],Config->ports[count]);
return ERROR;
}
if (!BindSocket(openSockfd[count],client,server,Config->ports[count],Config->addrs[count]))
{
log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
}
else
{
/* Associate the new open port with a slot in the socket engine */
ServerInstance->SE->AddFd(openSockfd[count],true,X_LISTEN);
BoundPortCount++;
}
}
return InitialPortCount + BoundPortCount;
}
else
{
log(DEBUG,"There is nothing new to bind!");
}
return InitialPortCount;
}
for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
{
Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF);
Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF);
Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF);
if ((!*Type) || (!strcmp(Type,"clients")))
{
// modules handle server bind types now
Config->ports[clientportcount] = atoi(configToken);
// If the client put bind "*", this is an unrealism.
// We don't actually support this as documented, but
// i got fed up of people trying it, so now it converts
// it to an empty string meaning the same 'bind to all'.
if (*Addr == '*')
*Addr = 0;
strlcpy(Config->addrs[clientportcount],Addr,256);
clientportcount++;
log(DEBUG,"Binding %s:%s [%s] from config",Addr,configToken, Type);
}
}
int PortCount = clientportcount;
for (int count = 0; count < PortCount; count++)
{
if ((openSockfd[BoundPortCount] = OpenTCPSocket()) == ERROR)
{
log(DEBUG,"Bad fd %d binding port [%s:%d]",openSockfd[BoundPortCount],Config->addrs[count],Config->ports[count]);
return ERROR;
}
if (!BindSocket(openSockfd[BoundPortCount],client,server,Config->ports[count],Config->addrs[count]))
{
log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
}
else
{
/* well we at least bound to one socket so we'll continue */
BoundPortCount++;
}
}
/* if we didn't bind to anything then abort */
if (!BoundPortCount)
{
log(DEFAULT,"No ports bound, bailing!");
printf("\nERROR: Could not bind any of %d ports! Please check your configuration.\n\n", PortCount);
return ERROR;
}
return BoundPortCount;
}
|
