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chatnav.c

/*
 * Handle ChatNav.
 *
 * [The ChatNav(igation) service does various things to keep chat
 *  alive.  It provides room information, room searching and creating, 
 *  as well as giving users the right ("permission") to use chat.]
 *
 */

#define FAIM_INTERNAL
#include <aim.h>

/*
 * conn must be a chatnav connection!
 */
faim_export int aim_chatnav_reqrights(aim_session_t *sess, aim_conn_t *conn)
{
      return aim_genericreq_n_snacid(sess, conn, 0x000d, 0x0002);
}

faim_export int aim_chatnav_createroom(aim_session_t *sess, aim_conn_t *conn, const char *name, fu16_t exchange)
{
      static const char ck[] = {"create"};
      static const char lang[] = {"en"};
      static const char charset[] = {"us-ascii"};
      aim_frame_t *fr;
      aim_snacid_t snacid;
      aim_tlvlist_t *tl = NULL;

      if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 1152)))
            return -ENOMEM;

      snacid = aim_cachesnac(sess, 0x000d, 0x0008, 0x0000, NULL, 0);
      aim_putsnac(&fr->data, 0x000d, 0x0008, 0x0000, snacid);

      /* exchange */
      aimbs_put16(&fr->data, exchange);

      /* action cookie */
      aimbs_put8(&fr->data, strlen(ck));
      aimbs_putraw(&fr->data, ck, strlen(ck));

      /* 
       * instance
       * 
       * Setting this to 0xffff apparently assigns the last instance.
       *
       */
      aimbs_put16(&fr->data, 0xffff);

      /* detail level */
      aimbs_put8(&fr->data, 0x01);

      aim_addtlvtochain_raw(&tl, 0x00d3, strlen(name), name);
      aim_addtlvtochain_raw(&tl, 0x00d6, strlen(charset), charset);
      aim_addtlvtochain_raw(&tl, 0x00d7, strlen(lang), lang);

      /* tlvcount */
      aimbs_put16(&fr->data, aim_counttlvchain(&tl));
      aim_writetlvchain(&fr->data, &tl);

      aim_freetlvchain(&tl);

      aim_tx_enqueue(sess, fr);

      return 0;
}

static int parseinfo_perms(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs, aim_snac_t *snac2)
{
      aim_rxcallback_t userfunc;
      int ret = 0;
      struct aim_chat_exchangeinfo *exchanges = NULL;
      int curexchange;
      aim_tlv_t *exchangetlv;
      fu8_t maxrooms = 0;
      aim_tlvlist_t *tlvlist, *innerlist;

      tlvlist = aim_readtlvchain(bs);

      /* 
       * Type 0x0002: Maximum concurrent rooms.
       */ 
      if (aim_gettlv(tlvlist, 0x0002, 1))
            maxrooms = aim_gettlv8(tlvlist, 0x0002, 1);

      /* 
       * Type 0x0003: Exchange information
       *
       * There can be any number of these, each one
       * representing another exchange.  
       * 
       */
      for (curexchange = 0; ((exchangetlv = aim_gettlv(tlvlist, 0x0003, curexchange+1))); ) {
            aim_bstream_t tbs;

            aim_bstream_init(&tbs, exchangetlv->value, exchangetlv->length);

            curexchange++;

            exchanges = realloc(exchanges, curexchange * sizeof(struct aim_chat_exchangeinfo));

            /* exchange number */
            exchanges[curexchange-1].number = aimbs_get16(&tbs);
            innerlist = aim_readtlvchain(&tbs);

            /* 
             * Type 0x000a: Unknown.
             *
             * Usually three bytes: 0x0114 (exchange 1) or 0x010f (others).
             *
             */
            if (aim_gettlv(innerlist, 0x000a, 1))
                  ;

            /* 
             * Type 0x000d: Unknown.
             */
            if (aim_gettlv(innerlist, 0x000d, 1))
                  ;

            /* 
             * Type 0x0004: Unknown
             */
            if (aim_gettlv(innerlist, 0x0004, 1))
                  ;

            /* 
             * Type 0x0002: Unknown
             */
            if (aim_gettlv(innerlist, 0x0002, 1)) {
                  fu16_t classperms;

                  classperms = aim_gettlv16(innerlist, 0x0002, 1);
                  
                  faimdprintf(sess, 1, "faim: class permissions %x\n", classperms);
            }

            /*
             * Type 0x00c9: Flags
             *
             * 1 Evilable
             * 2 Nav Only
             * 4 Instancing Allowed
             * 8 Occupant Peek Allowed
             *
             */ 
            if (aim_gettlv(innerlist, 0x00c9, 1))
                  exchanges[curexchange-1].flags = aim_gettlv16(innerlist, 0x00c9, 1);
                  
            /*
             * Type 0x00ca: Creation Date 
             */
            if (aim_gettlv(innerlist, 0x00ca, 1))
                  ;
                  
            /*
             * Type 0x00d0: Mandatory Channels?
             */
            if (aim_gettlv(innerlist, 0x00d0, 1))
                  ;

            /*
             * Type 0x00d1: Maximum Message length
             */
            if (aim_gettlv(innerlist, 0x00d1, 1))
                  ;

            /*
             * Type 0x00d2: Maximum Occupancy?
             */
            if (aim_gettlv(innerlist, 0x00d2, 1))     
                  ;

            /*
             * Type 0x00d3: Exchange Description
             */
            if (aim_gettlv(innerlist, 0x00d3, 1))     
                  exchanges[curexchange-1].name = aim_gettlv_str(innerlist, 0x00d3, 1);
            else
                  exchanges[curexchange-1].name = NULL;

            /*
             * Type 0x00d4: Exchange Description URL
             */
            if (aim_gettlv(innerlist, 0x00d4, 1))     
                  ;

            /*
             * Type 0x00d5: Creation Permissions
             *
             * 0  Creation not allowed
             * 1  Room creation allowed
             * 2  Exchange creation allowed
             * 
             */
            if (aim_gettlv(innerlist, 0x00d5, 1)) {
                  fu8_t createperms;

                  createperms = aim_gettlv8(innerlist, 0x00d5, 1);
            }

            /*
             * Type 0x00d6: Character Set (First Time)
             */         
            if (aim_gettlv(innerlist, 0x00d6, 1))     
                  exchanges[curexchange-1].charset1 = aim_gettlv_str(innerlist, 0x00d6, 1);
            else
                  exchanges[curexchange-1].charset1 = NULL;
                  
            /*
             * Type 0x00d7: Language (First Time)
             */         
            if (aim_gettlv(innerlist, 0x00d7, 1))     
                  exchanges[curexchange-1].lang1 = aim_gettlv_str(innerlist, 0x00d7, 1);
            else
                  exchanges[curexchange-1].lang1 = NULL;

            /*
             * Type 0x00d8: Character Set (Second Time)
             */         
            if (aim_gettlv(innerlist, 0x00d8, 1))     
                  exchanges[curexchange-1].charset2 = aim_gettlv_str(innerlist, 0x00d8, 1);
            else
                  exchanges[curexchange-1].charset2 = NULL;

            /*
             * Type 0x00d9: Language (Second Time)
             */         
            if (aim_gettlv(innerlist, 0x00d9, 1))     
                  exchanges[curexchange-1].lang2 = aim_gettlv_str(innerlist, 0x00d9, 1);
            else
                  exchanges[curexchange-1].lang2 = NULL;
                  
            /*
             * Type 0x00da: Unknown
             */
            if (aim_gettlv(innerlist, 0x00da, 1))     
                  ;

            aim_freetlvchain(&innerlist);
      }

      /*
       * Call client.
       */
      if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
            ret = userfunc(sess, rx, snac2->type, maxrooms, curexchange, exchanges);

      for (curexchange--; curexchange >= 0; curexchange--) {
            free(exchanges[curexchange].name);
            free(exchanges[curexchange].charset1);
            free(exchanges[curexchange].lang1);
            free(exchanges[curexchange].charset2);
            free(exchanges[curexchange].lang2);
      }
      free(exchanges);
      aim_freetlvchain(&tlvlist);

      return ret;
}

static int parseinfo_create(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs, aim_snac_t *snac2)
{
      aim_rxcallback_t userfunc;
      aim_tlvlist_t *tlvlist, *innerlist;
      char *ck = NULL, *fqcn = NULL, *name = NULL;
      fu16_t exchange = 0, instance = 0, unknown = 0, flags = 0, maxmsglen = 0, maxoccupancy = 0;
      fu32_t createtime = 0;
      fu8_t createperms = 0, detaillevel;
      int cklen;
      aim_tlv_t *bigblock;
      int ret = 0;
      aim_bstream_t bbbs;

      tlvlist = aim_readtlvchain(bs);

      if (!(bigblock = aim_gettlv(tlvlist, 0x0004, 1))) {
            faimdprintf(sess, 0, "no bigblock in top tlv in create room response\n");
            aim_freetlvchain(&tlvlist);
            return 0;
      }

      aim_bstream_init(&bbbs, bigblock->value, bigblock->length);

      exchange = aimbs_get16(&bbbs);
      cklen = aimbs_get8(&bbbs);
      ck = aimbs_getstr(&bbbs, cklen);
      instance = aimbs_get16(&bbbs);
      detaillevel = aimbs_get8(&bbbs);

      if (detaillevel != 0x02) {
            faimdprintf(sess, 0, "unknown detaillevel in create room response (0x%02x)\n", detaillevel);
            aim_freetlvchain(&tlvlist);
            free(ck);
            return 0;
      }

      unknown = aimbs_get16(&bbbs);

      innerlist = aim_readtlvchain(&bbbs);

      if (aim_gettlv(innerlist, 0x006a, 1))
            fqcn = aim_gettlv_str(innerlist, 0x006a, 1);

      if (aim_gettlv(innerlist, 0x00c9, 1))
            flags = aim_gettlv16(innerlist, 0x00c9, 1);

      if (aim_gettlv(innerlist, 0x00ca, 1))
            createtime = aim_gettlv32(innerlist, 0x00ca, 1);

      if (aim_gettlv(innerlist, 0x00d1, 1))
            maxmsglen = aim_gettlv16(innerlist, 0x00d1, 1);

      if (aim_gettlv(innerlist, 0x00d2, 1))
            maxoccupancy = aim_gettlv16(innerlist, 0x00d2, 1);

      if (aim_gettlv(innerlist, 0x00d3, 1))
            name = aim_gettlv_str(innerlist, 0x00d3, 1);

      if (aim_gettlv(innerlist, 0x00d5, 1))
            createperms = aim_gettlv8(innerlist, 0x00d5, 1);

      if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) {
            ret = userfunc(sess, rx, snac2->type, fqcn, instance, exchange, flags, createtime, maxmsglen, maxoccupancy, createperms, unknown, name, ck);
      }

      free(ck);
      free(name);
      free(fqcn);
      aim_freetlvchain(&innerlist);
      aim_freetlvchain(&tlvlist);

      return ret;
}

/*
 * Since multiple things can trigger this callback, we must lookup the 
 * snacid to determine the original snac subtype that was called.
 *
 * XXX This isn't really how this works.  But this is:  Every d/9 response
 * has a 16bit value at the beginning. That matches to:
 *    Short Desc = 1
 *    Full Desc = 2
 *    Instance Info = 4
 *    Nav Short Desc = 8
 *    Nav Instance Info = 16
 * And then everything is really asynchronous.  There is no specific 
 * attachment of a response to a create room request, for example.  Creating
 * the room yields no different a response than requesting the room's info.
 *
 */
static int parseinfo(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
{
      aim_snac_t *snac2;
      int ret = 0;

      if (!(snac2 = aim_remsnac(sess, snac->id))) {
            faimdprintf(sess, 0, "faim: chatnav_parse_info: received response to unknown request! (%08lx)\n", snac->id);
            return 0;
      }

      if (snac2->family != 0x000d) {
            faimdprintf(sess, 0, "faim: chatnav_parse_info: recieved response that maps to corrupt request! (fam=%04x)\n", snac2->family);
            return 0;
      }

      /*
       * We now know what the original SNAC subtype was.
       */
      if (snac2->type == 0x0002) /* request chat rights */
            ret = parseinfo_perms(sess, mod, rx, snac, bs, snac2);
      else if (snac2->type == 0x0003) /* request exchange info */
            faimdprintf(sess, 0, "chatnav_parse_info: resposne to exchange info\n");
      else if (snac2->type == 0x0004) /* request room info */
            faimdprintf(sess, 0, "chatnav_parse_info: response to room info\n");
      else if (snac2->type == 0x0005) /* request more room info */
            faimdprintf(sess, 0, "chatnav_parse_info: response to more room info\n");
      else if (snac2->type == 0x0006) /* request occupant list */
            faimdprintf(sess, 0, "chatnav_parse_info: response to occupant info\n");
      else if (snac2->type == 0x0007) /* search for a room */
            faimdprintf(sess, 0, "chatnav_parse_info: search results\n");
      else if (snac2->type == 0x0008) /* create room */
            ret = parseinfo_create(sess, mod, rx, snac, bs, snac2);
      else
            faimdprintf(sess, 0, "chatnav_parse_info: unknown request subtype (%04x)\n", snac2->type);

      if (snac2)
            free(snac2->data);
      free(snac2);

      return ret;
}

static int snachandler(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
{

      if (snac->subtype == 0x0009)
            return parseinfo(sess, mod, rx, snac, bs);

      return 0;
}

faim_internal int chatnav_modfirst(aim_session_t *sess, aim_module_t *mod)
{

      mod->family = 0x000d;
      mod->version = 0x0001;
      mod->toolid = 0x0010;
      mod->toolversion = 0x047c;
      mod->flags = 0;
      strncpy(mod->name, "chatnav", sizeof(mod->name));
      mod->snachandler = snachandler;

      return 0;
}

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