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