main/ip_base.h

   1 /*
   2  * $Source: /cvs/cvsroot/d2x/main/ip_base.h,v $
   3  * $Revision: 1.3 $
   4  * $Author: bradleyb $
   5  * $Date: 2002-02-14 09:24:19 $
   6  *
   7  * ip_base.h - base for NAT-compatible udp/ip code.
   8  * added 2000/02/07 Matt Mueller
   9  *
  10  * $Log: not supported by cvs2svn $
  11  * Revision 1.2  2002/02/13 10:45:49  bradleyb
  12  * Lotsa networking stuff from d1x
  13  *
  14  * Revision 1.1  2002/02/06 09:22:41  bradleyb
  15  * Adding d1x network code
  16  *
  17  *
  18  */
  19
  20 #ifndef ___IP_BASE_H
  21 #define ___IP_BASE_H
  22
  23 #include <map.h>
  24 #include <list.h>
  25 #include <algo.h>
  26 extern "C" {
  27 #include "ip_basec.h"
  28 #include "fix.h"
  29 #include "mono.h"
  30 #include "vers_id.h"
  31 //#include "inetc.h"
  32 #include "timer.h"
  33 }
  34
  35 class ip_addr;//prototype for arch_ip_queryhost
  36
  37 #include "ipclient.h"
  38 #include <stdio.h>
  39
  40
  41 //inline u_int32_t d_rand32(void) { return d_rand() + (d_rand()<<16);}
  42 inline u_int32_t d_rand32(void) { return d_rand() + (d_rand()<<15) + (d_rand()<<30);}//d_rand() only returns 15 bits
  43
  44
  45 void ip_receive_cfg(ubyte *buf,int buflen,ip_addr fromaddr);
  46
  47 extern unsigned char ipx_MyAddress[10];
  48
  49 unsigned short ip_portshift(unsigned short baseport, const char *cs);
  50
  51 #define UDP_BASEPORT 31017
  52 #define UDP_SERV_BASEPORT 30817
  53 #define PORTSHIFT_TOLERANCE 0x100
  54 #define MAX_PACKETSIZE 8192
  55
  56 // Length HAS TO BE 2!
  57 #define D2Xid "\xd2x"
  58 // Length HAS TO BE 4!
  59 #define D2Xcfgid "\xcfg\xd2x"
  60
  61
  62 //cfg packet types
  63 #define IP_CFG_BASE 0
  64 #define IP_CFG_HANDSHAKE 1
  65 #define IP_CFG_RELAY 2
  66 //someone giving us an error (ie, outdated version, etc.) ... not handled yet.
  67 #define IP_CFG_SORRY 3
  68
  69
  70 #define STATE_INEEDINFO         1<<0
  71 #define STATE_SENDINGINFO       1<<1
  72 //#define STATE_NEED_RESEND     (STATE_INEEDINFO | STATE_SENDINGINFO)
  73 #define STATE_NEED_RESEND       (STATE_INEEDINFO)
  74 #define STATE_VALID_STATES      (STATE_INEEDINFO | STATE_SENDINGINFO)
  75 #define STATE_RELAYREPLY        1<<6
  76 #define STATE_ERR                       1<<7
  77 /* Dump raw form of IP address/port by fancy output to user
  78  */
  79
  80 #ifdef UDPDEBUG
  81 #include <stdio.h>
  82 inline char *ip_hs_statetoa(int state){
  83         if (!state)
  84                 return "NOSTATE";
  85         if (state&STATE_ERR)
  86                 return "ERR";
  87         if ((state&(STATE_INEEDINFO|STATE_SENDINGINFO))==(STATE_INEEDINFO|STATE_SENDINGINFO))
  88                 return "NEED+SEND";
  89         if (state&STATE_INEEDINFO)
  90                 return "NEED";
  91         if (state&STATE_SENDINGINFO)
  92                 return "SEND";
  93         return "huh?";
  94 }
  95 inline void dumprid(const unsigned char *a)
  96 {
  97     printf("<%u.%u.%u.%u.%u.%u>",a[0],a[1],a[2],a[3],a[4],a[5]);
  98 }
  99 inline void dumpraddr(const unsigned char *addr)
 100 {
 101         ushort port;
 102         printf("[%u.%u.%u.%u]",addr[0],addr[1],addr[2],addr[3]);
 103         port=(unsigned short)ntohs(*(unsigned short *)(addr+4));
 104         printf(":%d",port);
 105 }
 106 #endif
 107
 108
 109 class ip_id {
 110         public:
 111                 ubyte id[6];
 112
 113                 int fillbuf(ubyte *buf)const {memcpy(buf,id,6);return 6;};
 114                 int readbuf(const ubyte *buf){memcpy(id,buf,6);return 6;};
 115                 bool operator < (const ip_id &a_id)const {return memcmp(id,a_id.id,6)<0;}
 116                 bool operator == (const ip_id &a_id)const {return memcmp(id,a_id.id,6)==0;}
 117                 bool operator > (const ip_id &a_id)const {return memcmp(id,a_id.id,6)>0;}
 118                 ip_id& operator = (const ip_id &a_id){readbuf(a_id.id);return *this;}
 119 #ifdef UDPDEBUG
 120                 void dump(void){dumprid(id);}
 121 #endif
 122                 ip_id(ubyte*nid){readbuf(nid);}
 123                 ip_id(void){};
 124 };
 125
 126 class ip_addr {
 127         protected:
 128                 ubyte alen;//alen stuff is to maybe make ipv6 support easier (if the transition ever actually happens)
 129         public:
 130                 ubyte addr[6];
 131
 132                 int fillbuf(ubyte *buf)const {buf[0]=alen;memcpy(buf+1,addr,alen);return alen+1;};
 133                 int readbuf(const ubyte *buf){
 134                         int l=buf[0];
 135                         if (l==6){
 136                                 memcpy(addr,buf+1,6);alen=l;
 137                         }else{
 138                                 mprintf((0,"ip_addr readbuf bad len %i\n",l));
 139                                 memset(addr,0,6);alen=0;
 140                         }
 141                         return l+1;
 142                 };
 143                 bool operator < (const ip_addr &a_addr)const {
 144                         if (alen!=a_addr.alen) return alen<a_addr.alen;
 145                         return memcmp(addr,a_addr.addr,alen)<0;
 146                 }
 147                 bool operator == (const ip_addr &a_addr)const {return ((alen==a_addr.alen) && (memcmp(addr,a_addr.addr,alen)==0));}
 148                 bool operator > (const ip_addr &a_addr)const {
 149                         if (alen!=a_addr.alen) return alen>a_addr.alen;
 150                         return memcmp(addr,a_addr.addr,alen)>0;
 151                 }
 152                 ip_addr& operator = (const ip_addr &a_addr){alen=a_addr.alen;memcpy(addr,a_addr.addr,6);return *this;}
 153 #ifdef UDPDEBUG
 154                 void dump(void)const{dumpraddr(addr);}
 155 #endif
 156                 void set(int addrsize,ubyte *naddr,ushort port){
 157                         if (addrsize!=4)return;//not handled yet.
 158                         alen=addrsize+2;
 159                         memcpy(addr,naddr,addrsize);
 160 //                      port=htons(port);
 161                         memcpy(addr+addrsize,&port,2);
 162                 }
 163                 int dns(char *address,ushort baseport){
 164                         return arch_ip_queryhost(this,address,baseport);
 165                 }
 166                 bool ok(void)const{return alen>0;}
 167                 int addrlen(void)const{return alen-2;}
 168 //              ip_addr(ubyte*naddr){readbuf(naddr);}
 169                 ip_addr(void){alen=0;};
 170 };
 171
 172 class ip_addr_list {
 173         protected:
 174                 list<ip_addr> addrs;
 175         public:
 176                 typedef list<ip_addr>::iterator iterator;
 177                 typedef list<ip_addr>::const_iterator const_iterator;
 178                 int naddr;
 179                 ip_addr *goodaddr;
 180
 181                 iterator begin(void){return addrs.begin();}
 182                 iterator end(void){return addrs.end();}
 183                 const_iterator begin(void)const{return addrs.begin();}
 184                 const_iterator end(void)const{return addrs.end();}
 185                 bool hasaddr(ip_addr addr){
 186                         iterator i=find(begin(),end(),addr);
 187                         return (i!=addrs.end());
 188                 }
 189                 int add(ip_addr addr){
 190                         if (hasaddr(addr))
 191                                 return 0;
 192                         addrs.push_back(addr);
 193                         naddr++;
 194                         return 1;
 195                 }
 196                 int add(const ip_addr_list &na){
 197                         int j=0;
 198                         const_iterator i=na.begin();
 199                         for (;i!=na.end();++i)
 200                                 j+=add(*i);
 201                         return j;
 202                 }
 203                 void setgoodaddr(ip_addr addr){
 204                         iterator i=find(begin(),end(),addr);
 205                         if (i!=end()){
 206                                 goodaddr=&(*i);
 207                                 return;
 208                         }
 209                         addrs.push_back(addr);
 210                         goodaddr=&(*addrs.end());
 211                 }
 212                 int fillbuf(ubyte *buf)const {
 213                         int s=0;
 214                         const_iterator i;
 215                         buf[s++]=naddr;
 216                         for (i=begin();i!=end();++i)
 217                                 s+=(*i).fillbuf(buf+s);
 218                         return s;
 219                 }
 220                 int readbuf(const ubyte *buf){
 221                         int s=1,n;
 222                         ip_addr a;
 223                         for (n=buf[0];n;--n){
 224                                 s+=a.readbuf(buf+s);
 225 //                              addrs.push_back(a);
 226                                 if (a.ok())
 227                                         add(a);
 228                         }
 229                         return s;
 230                 }
 231                 void clear(void){
 232                         naddr=0;
 233                         goodaddr=NULL;
 234                         addrs.erase(begin(),end());
 235                 }
 236
 237                 ip_addr_list(const ip_addr_list &nl):addrs(nl.addrs),naddr(nl.naddr){setgoodaddr(*nl.goodaddr);}
 238                 ip_addr_list(void):naddr(0),goodaddr(NULL){}
 239 //              ip_addr_list(const ubyte * buf):naddr(0),goodaddr(NULL){readbuf(buf);}
 240 };
 241
 242 extern ip_addr_list ip_my_addrs;
 243
 244 extern int ip_sendtoca(ip_addr addr,const void *buf,int len);
 245
 246 class ip_handshake_base {
 247         public:
 248                 ubyte type;
 249                 ubyte state;
 250                 ip_id id;
 251                 u_int16_t iver;
 252                 u_int32_t tryid;
 253
 254                 fix nextsend;
 255                 int attempts;
 256                 int nopend;
 257
 258                 virtual int fillbuf(ubyte *buf);
 259                 virtual int readbuf(ubyte *buf);
 260                 void setrandid(void){tryid=d_rand32() ^ timer_get_approx_seconds();}
 261                 void setstate(int newstate);
 262                 int addstate(int newstate);
 263
 264 //              ip_handshake_base(void):type(IP_CFG_BASE){setstate(IPNOSTATE);}
 265                 ip_handshake_base(bool initme=0):type(IP_CFG_BASE){
 266                         nopend=0;
 267                         state=0;
 268                         setstate(0);
 269                         if(initme){
 270                 //              id=ip_my_id;
 271                                 id=ipx_MyAddress+4;
 272                                 iver=D2X_IVER;
 273                                 setrandid();
 274                         }
 275                 }
 276                 virtual ~ip_handshake_base(){setstate(0);}//decrement pendinghandshakes if needed.
 277 };
 278 class ip_handshake_info : public ip_handshake_base {
 279         public:
 280                 ip_addr_list addr;
 281
 282                 virtual int fillbuf(ubyte *buf);
 283                 virtual int readbuf(ubyte *buf);
 284
 285                 ip_handshake_info(ubyte *buf){
 286                         readbuf(buf);
 287                 }
 288                 ip_handshake_info(void):ip_handshake_base(1){
 289                         type=IP_CFG_HANDSHAKE;
 290                         addr=ip_my_addrs;
 291 //                      setstate(STATE_INEEDINFO);
 292                 }
 293 };
 294 class ip_peer;
 295 class ip_handshake_relay : public ip_handshake_base {
 296         public:
 297                 ip_id r_id;
 298                 u_int16_t r_iver;
 299                 ip_addr_list r_addr;
 300
 301                 virtual int fillbuf(ubyte *buf);
 302                 virtual int readbuf(ubyte *buf);
 303
 304                 ip_handshake_relay(ubyte *buf){
 305                         readbuf(buf);
 306                 }
 307                 ip_handshake_relay(ip_peer *torelay);
 308 };
 309
 310 //max number of times to try to handshake a host
 311 #define IP_MAX_HS_ATTEMPTS 10
 312 //how often to resend a hand-shake (3 seconds)
 313 #define IP_HS_RETRYTIME (F1_0*3)
 314 //how often (max) to search through the resend loop (1 second)
 315 #define IP_HS_FRAME_RETRYTIME (F1_0)
 316
 317 class ip_peer {
 318         public:
 319                 ip_addr_list addr;
 320 //              int goodaddr;
 321                 ip_id id;
 322                 int iver;
 323 //              ip_hs_state query;
 324 //              ip_hs_state reply;
 325                 list<ip_handshake_base*> handshakes;
 326
 327 //              void set_good_addr(ubyte *fraddr);
 328                 void add_hs(ip_handshake_base* hs){
 329 //                      mprintf((0,"########## add_hs %p: adding a hs %p %i %i\n",this,hs,hs->type,hs->state));
 330                         handshakes.push_back(hs);
 331                 }
 332                 ip_handshake_relay* find_relay(ip_id r_id){
 333                         list<ip_handshake_base*>::iterator i;
 334                         ip_handshake_base* hsb;
 335                         ip_handshake_relay* hsr;
 336                         for (i=handshakes.begin();i!=handshakes.end();++i){
 337                                 hsb=(*i);
 338                                 if (hsb->type==IP_CFG_RELAY){
 339                                         hsr=(ip_handshake_relay*)hsb;
 340                                         if (hsr->r_id==r_id)
 341                                                 return hsr;
 342                                 }
 343                         }
 344                         return NULL;
 345                 }
 346                 ip_handshake_info* find_handshake(void){
 347                         list<ip_handshake_base*>::iterator i;
 348                         ip_handshake_base* hsb;
 349                         for (i=handshakes.begin();i!=handshakes.end();++i){
 350                                 hsb=(*i);
 351                                 if (hsb->type==IP_CFG_HANDSHAKE)
 352                                         return (ip_handshake_info*) hsb;
 353                         }
 354                         ip_handshake_info *ni=new ip_handshake_info();
 355 //                      handshakes.push_back(ni);
 356                         add_hs(ni);
 357                         return ni;
 358                 }
 359 /*              ip_handshake_base* find_hs(u_int32_t tryid, ubyte type){
 360                         list<ip_handshake_base*>::iterator i;
 361                         ip_handshake_base* hsb;
 362                         for (i=handshakes.begin();i!=handshakes.end();++i){
 363                                 hsb=(*i);
 364                                 if (hsb->tryid==tryid && hsb->type==type)
 365                                         return hsb;
 366                         }
 367                         return NULL;
 368                 }*/
 369                 void send_handshake(ip_handshake_base*hsb);
 370                 bool verify_addr(ip_addr_list &fraddrs);
 371                 ip_peer(void){iver=0;}
 372                 ~ip_peer(){
 373                         list<ip_handshake_base*>::iterator i;
 374                         for (i=handshakes.begin();i!=handshakes.end();++i){
 375 /*                              mprintf((0,"###### ~ip_peer %p: deleting a hs %p %i %i\n",this,(*i),(*i)->type,(*i)->state));
 376                                 if (!(*i))
 377                                         mprintf((0,"~ip_peer null hs?\n"));
 378                                 else*/
 379                                         delete (*i);
 380                         }
 381                 }
 382 };
 383
 384
 385 class ip_peer_list {
 386         public:
 387                 typedef map<ip_id,ip_peer *,less<ip_id> > peer_map;
 388                 peer_map peers;
 389                 list<ip_peer*> unknown_peers;
 390                 int pendinghandshakes;
 391                 fix pendinghandshake_lasttime;
 392
 393                 ip_peer * add_id(ip_id id){
 394                         ip_peer*n=new ip_peer();
 395                         n->id=id;
 396                         peers.insert(peer_map::value_type(n->id,n));
 397                         return n;
 398                 }
 399                 ip_peer * add_unk(void){
 400                         ip_peer*n=new ip_peer();
 401                         unknown_peers.push_back(n);
 402                         return n;
 403                 }
 404                 //ip_peer * add_1(ubyte *addr,ip_id id);
 405                 ip_peer * add_1(ip_addr addr);
 406                 ip_peer * add_full(ip_id id, u_int16_t iver, ip_addr_list &addrs);
 407                 void make_full(ip_peer*p,ip_id id, u_int16_t iver, ip_addr_list &addrs);
 408                 ip_peer * add_hsi(ip_handshake_info *hsi){return add_full(hsi->id,hsi->iver,hsi->addr);}
 409                 ip_peer * find_byid(ip_id id);
 410                 ip_peer * find_by_addr(ip_addr addr);
 411                 ip_peer * find_unk_by_addr(ip_addr addr);
 412                 void handshake_frame(void);
 413                 void clear(void);
 414                 ip_peer_list(){
 415                         pendinghandshakes=0;
 416                         pendinghandshake_lasttime=0;
 417                 }
 418                 ~ip_peer_list();
 419 };
 420 extern ip_peer_list peer_list;
 421
 422 #endif