src/socket.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 #include <string>
  18 #include "configreader.h"
  19 #include "socket.h"
  20 #include "inspircd.h"
  21 #include "inspstring.h"
  22 #include "helperfuncs.h"
  23 #include "socketengine.h"
  24 #include "message.h"
  25
  26 extern InspIRCd* ServerInstance;
  27 extern ServerConfig* Config;
  28 extern time_t TIME;
  29
  30 /** This will bind a socket to a port. It works for UDP/TCP.
  31  * It can only bind to IP addresses, if you wish to bind to hostnames
  32  * you should first resolve them using class 'Resolver'.
  33  */
  34 bool BindSocket(int sockfd, insp_sockaddr client, insp_sockaddr server, int port, char* addr)
  35 {
  36         memset(&server,0,sizeof(server));
  37         insp_inaddr addy;
  38
  39         if (*addr == '*')
  40                 *addr = 0;
  41
  42         if ((*addr) && (inet_aton(addr,&addy) < 1))
  43         {
  44                 log(DEBUG,"Invalid IP '%s' given to BindSocket()", addr);
  45                 return false;;
  46         }
  47
  48 #ifdef IPV6
  49         server.sin6_family = AF_FAMILY;
  50 #else
  51         server.sin_family = AF_FAMILY;
  52 #endif
  53         if (!*addr)
  54         {
  55 #ifdef IPV6
  56                 memcpy(&addy, &server.sin6_addr, sizeof(in6_addr));
  57 #else
  58                 server.sin_addr.s_addr = htonl(INADDR_ANY);
  59 #endif
  60         }
  61         else
  62         {
  63 #ifdef IPV6
  64                 memcpy(&addy, &server.sin6_addr, sizeof(in6_addr));
  65 #else
  66                 server.sin_addr = addy;
  67 #endif
  68         }
  69 #ifdef IPV6
  70         server.sin6_port = htons(port);
  71 #else
  72         server.sin_port = htons(port);
  73 #endif
  74         if (bind(sockfd,(struct sockaddr*)&server,sizeof(server)) < 0)
  75         {
  76                 return false;
  77         }
  78         else
  79         {
  80                 log(DEBUG,"Bound port %s:%d",*addr ? addr : "*",port);
  81                 if (listen(sockfd, Config->MaxConn) == -1)
  82                 {
  83                         log(DEFAULT,"ERROR in listen(): %s",strerror(errno));
  84                         return false;
  85                 }
  86                 else
  87                 {
  88                         NonBlocking(sockfd);
  89                         return true;
  90                 }
  91         }
  92 }
  93
  94
  95 // Open a TCP Socket
  96 int OpenTCPSocket()
  97 {
  98         int sockfd;
  99         int on = 1;
 100         struct linger linger = { 0 };
 101
 102         if ((sockfd = socket (AF_FAMILY, SOCK_STREAM, 0)) < 0)
 103         {
 104                 log(DEFAULT,"Error creating TCP socket: %s",strerror(errno));
 105                 return (ERROR);
 106         }
 107         else
 108         {
 109                 setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
 110                 /* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
 111                 linger.l_onoff = 1;
 112                 linger.l_linger = 1;
 113                 setsockopt(sockfd, SOL_SOCKET, SO_LINGER, &linger,sizeof(linger));
 114                 return (sockfd);
 115         }
 116 }
 117
 118 bool HasPort(int port, char* addr)
 119 {
 120         for (unsigned long count = 0; count < ServerInstance->stats->BoundPortCount; count++)
 121         {
 122                 if ((port == Config->ports[count]) && (!strcasecmp(Config->addrs[count],addr)))
 123                 {
 124                         return true;
 125                 }
 126         }
 127         return false;
 128 }
 129
 130 int BindPorts(bool bail)
 131 {
 132         char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
 133         insp_sockaddr client, server;
 134         int clientportcount = 0;
 135         int BoundPortCount = 0;
 136
 137         if (!bail)
 138         {
 139                 int InitialPortCount = ServerInstance->stats->BoundPortCount;
 140                 log(DEBUG,"Initial port count: %d",InitialPortCount);
 141
 142                 for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
 143                 {
 144                         Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF);
 145                         Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF);
 146                         Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF);
 147
 148                         if (((!*Type) || (!strcmp(Type,"clients"))) && (!HasPort(atoi(configToken),Addr)))
 149                         {
 150                                 // modules handle server bind types now
 151                                 Config->ports[clientportcount+InitialPortCount] = atoi(configToken);
 152                                 if (*Addr == '*')
 153                                         *Addr = 0;
 154
 155                                 strlcpy(Config->addrs[clientportcount+InitialPortCount],Addr,256);
 156                                 clientportcount++;
 157                                 log(DEBUG,"NEW binding %s:%s [%s] from config",Addr,configToken, Type);
 158                         }
 159                 }
 160                 int PortCount = clientportcount;
 161                 if (PortCount)
 162                 {
 163                         for (int count = InitialPortCount; count < InitialPortCount + PortCount; count++)
 164                         {
 165                                 if ((Config->openSockfd[count] = OpenTCPSocket()) == ERROR)
 166                                 {
 167                                         log(DEBUG,"Bad fd %d binding port [%s:%d]",Config->openSockfd[count],Config->addrs[count],Config->ports[count]);
 168                                         return ERROR;
 169                                 }
 170                                 if (!BindSocket(Config->openSockfd[count],client,server,Config->ports[count],Config->addrs[count]))
 171                                 {
 172                                         log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
 173                                 }
 174                                 else
 175                                 {
 176                                         /* Associate the new open port with a slot in the socket engine */
 177                                         if (Config->openSockfd[count] > -1)
 178                                         {
 179                                                 ServerInstance->SE->AddFd(Config->openSockfd[count],true,X_LISTEN);
 180                                                 BoundPortCount++;
 181                                         }
 182                                 }
 183                         }
 184                         return InitialPortCount + BoundPortCount;
 185                 }
 186                 else
 187                 {
 188                         log(DEBUG,"There is nothing new to bind!");
 189                 }
 190                 return InitialPortCount;
 191         }
 192
 193         for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
 194         {
 195                 Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF);
 196                 Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF);
 197                 Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF);
 198
 199                 if ((!*Type) || (!strcmp(Type,"clients")))
 200                 {
 201                         // modules handle server bind types now
 202                         Config->ports[clientportcount] = atoi(configToken);
 203
 204                         // If the client put bind "*", this is an unrealism.
 205                         // We don't actually support this as documented, but
 206                         // i got fed up of people trying it, so now it converts
 207                         // it to an empty string meaning the same 'bind to all'.
 208                         if (*Addr == '*')
 209                                 *Addr = 0;
 210
 211                         strlcpy(Config->addrs[clientportcount],Addr,256);
 212                         clientportcount++;
 213                         log(DEBUG,"Binding %s:%s [%s] from config",Addr,configToken, Type);
 214                 }
 215         }
 216
 217         int PortCount = clientportcount;
 218
 219         for (int count = 0; count < PortCount; count++)
 220         {
 221                 if ((Config->openSockfd[BoundPortCount] = OpenTCPSocket()) == ERROR)
 222                 {
 223                         log(DEBUG,"Bad fd %d binding port [%s:%d]",Config->openSockfd[BoundPortCount],Config->addrs[count],Config->ports[count]);
 224                         return ERROR;
 225                 }
 226
 227                 if (!BindSocket(Config->openSockfd[BoundPortCount],client,server,Config->ports[count],Config->addrs[count]))
 228                 {
 229                         log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
 230                 }
 231                 else
 232                 {
 233                         /* well we at least bound to one socket so we'll continue */
 234                         BoundPortCount++;
 235                 }
 236         }
 237
 238         /* if we didn't bind to anything then abort */
 239         if (!BoundPortCount)
 240         {
 241                 log(DEFAULT,"No ports bound, bailing!");
 242                 printf("\nERROR: Could not bind any of %d ports! Please check your configuration.\n\n", PortCount);
 243                 return ERROR;
 244         }
 245
 246         return BoundPortCount;
 247 }
 248
 249 const char* insp_ntoa(insp_inaddr n)
 250 {
 251         static char buf[1024];
 252         inet_ntop(AF_FAMILY, &n, buf, sizeof(buf));
 253         return buf;
 254 }
 255
 256 int insp_aton(const char* a, insp_inaddr* n)
 257 {
 258         return inet_pton(AF_FAMILY, a, n);
 259 }
 260