main/ip_base.h

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  63 //someone giving us an error (ie, outdated version, etc.)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