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info.c

/*
 * aim_info.c
 *
 * The functions here are responsible for requesting and parsing information-
 * gathering SNACs.  Or something like that. 
 *
 */

#define FAIM_INTERNAL
#include <aim.h>

struct aim_priv_inforeq {
      char sn[MAXSNLEN+1];
      fu16_t infotype;
};

faim_export int aim_getinfo(aim_session_t *sess, aim_conn_t *conn, const char *sn, fu16_t infotype)
{
      struct aim_priv_inforeq privdata;
      aim_frame_t *fr;
      aim_snacid_t snacid;

      if (!sess || !conn || !sn)
            return -EINVAL;

      if ((infotype != AIM_GETINFO_GENERALINFO) && (infotype != AIM_GETINFO_AWAYMESSAGE))
            return -EINVAL;

      if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 12+1+strlen(sn))))
            return -ENOMEM;

      strncpy(privdata.sn, sn, sizeof(privdata.sn));
      privdata.infotype = infotype;
      snacid = aim_cachesnac(sess, 0x0002, 0x0005, 0x0000, &privdata, sizeof(struct aim_priv_inforeq));
      
      aim_putsnac(&fr->data, 0x0002, 0x0005, 0x0000, snacid);
      aimbs_put16(&fr->data, infotype);
      aimbs_put8(&fr->data, strlen(sn));
      aimbs_putraw(&fr->data, sn, strlen(sn));

      aim_tx_enqueue(sess, fr);

      return 0;
}

faim_export const char *aim_userinfo_sn(aim_userinfo_t *ui)
{

      if (!ui)
            return NULL;

      return ui->sn;
}

faim_export fu16_t aim_userinfo_flags(aim_userinfo_t *ui)
{

      if (!ui)
            return 0;

      return ui->flags;
}

faim_export fu16_t aim_userinfo_idle(aim_userinfo_t *ui)
{

      if (!ui)
            return 0;

      return ui->idletime;
}

faim_export float aim_userinfo_warnlevel(aim_userinfo_t *ui)
{

      if (!ui)
            return 0.00;

      return (ui->warnlevel / 10);
}

faim_export time_t aim_userinfo_membersince(aim_userinfo_t *ui)
{

      if (!ui)
            return 0;

      return (time_t)ui->membersince;
}

faim_export time_t aim_userinfo_onlinesince(aim_userinfo_t *ui)
{

      if (!ui)
            return 0;

      return (time_t)ui->onlinesince;
}

faim_export fu32_t aim_userinfo_sessionlen(aim_userinfo_t *ui)
{

      if (!ui)
            return 0;

      return ui->sessionlen;
}

faim_export int aim_userinfo_hascap(aim_userinfo_t *ui, fu16_t cap)
{

      if (!ui || !ui->capspresent)
            return -1;

      return !!(ui->capabilities & cap);
}


/*
 * Capability blocks.  
 */
static const struct {
      unsigned short flag;
      unsigned char data[16];
} aim_caps[] = {

      /*
       * Chat is oddball.
       */
      {AIM_CAPS_CHAT,
       {0x74, 0x8f, 0x24, 0x20, 0x62, 0x87, 0x11, 0xd1, 
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      /*
       * These are mostly in order.
       */
      {AIM_CAPS_VOICE,
       {0x09, 0x46, 0x13, 0x41, 0x4c, 0x7f, 0x11, 0xd1, 
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      {AIM_CAPS_SENDFILE,
       {0x09, 0x46, 0x13, 0x43, 0x4c, 0x7f, 0x11, 0xd1, 
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      /*
       * Advertised by the EveryBuddy client.
       */
      {AIM_CAPS_ICQ,
       {0x09, 0x46, 0x13, 0x44, 0x4c, 0x7f, 0x11, 0xd1, 
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      {AIM_CAPS_IMIMAGE,
       {0x09, 0x46, 0x13, 0x45, 0x4c, 0x7f, 0x11, 0xd1, 
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      {AIM_CAPS_BUDDYICON,
       {0x09, 0x46, 0x13, 0x46, 0x4c, 0x7f, 0x11, 0xd1, 
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      {AIM_CAPS_SAVESTOCKS,
       {0x09, 0x46, 0x13, 0x47, 0x4c, 0x7f, 0x11, 0xd1,
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      {AIM_CAPS_GETFILE,
       {0x09, 0x46, 0x13, 0x48, 0x4c, 0x7f, 0x11, 0xd1,
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      /*
       * Indeed, there are two of these.  The former appears to be correct, 
       * but in some versions of winaim, the second one is set.  Either they 
       * forgot to fix endianness, or they made a typo. It really doesn't 
       * matter which.
       */
      {AIM_CAPS_GAMES,
       {0x09, 0x46, 0x13, 0x4a, 0x4c, 0x7f, 0x11, 0xd1,
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},
      {AIM_CAPS_GAMES2,
       {0x09, 0x46, 0x13, 0x4a, 0x4c, 0x7f, 0x11, 0xd1,
        0x22, 0x82, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      {AIM_CAPS_SENDBUDDYLIST,
       {0x09, 0x46, 0x13, 0x4b, 0x4c, 0x7f, 0x11, 0xd1,
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      {AIM_CAPS_ABINTERNAL,
       {0x09, 0x46, 0x13, 0x4f, 0x4c, 0x7f, 0x11, 0xd1,
        0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

      {AIM_CAPS_LAST}
};

/*
 * This still takes a length parameter even with a bstream because capabilities
 * are not naturally bounded.
 * 
 */
faim_internal fu16_t aim_getcap(aim_session_t *sess, aim_bstream_t *bs, int len)
{
      fu16_t flags = 0;
      int offset;

      for (offset = 0; aim_bstream_empty(bs) && (offset < len); offset += 0x10) {
            fu8_t *cap;
            int i, identified;

            cap = aimbs_getraw(bs, 0x10);

            for (i = 0, identified = 0; !(aim_caps[i].flag & AIM_CAPS_LAST); i++) {

                  if (memcmp(&aim_caps[i].data, cap, 0x10) == 0) {
                        flags |= aim_caps[i].flag;
                        identified++;
                        break; /* should only match once... */

                  }
            }

            if (!identified)
                  faimdprintf(sess, 0, "unknown capability!\n");

            free(cap);
      }

      return flags;
}

faim_internal int aim_putcap(aim_bstream_t *bs, fu16_t caps)
{
      int i;

      if (!bs)
            return -EINVAL;

      for (i = 0; aim_bstream_empty(bs); i++) {

            if (aim_caps[i].flag == AIM_CAPS_LAST)
                  break;

            if (caps & aim_caps[i].flag)
                  aimbs_putraw(bs, aim_caps[i].data, 0x10);

      }

      return 0;
}

/*
 * AIM is fairly regular about providing user info.  This is a generic 
 * routine to extract it in its standard form.
 */
faim_internal int aim_extractuserinfo(aim_session_t *sess, aim_bstream_t *bs, aim_userinfo_t *outinfo)
{
      int curtlv, tlvcnt;
      fu8_t snlen;

      if (!bs || !outinfo)
            return -EINVAL;

      /* Clear out old data first */
      memset(outinfo, 0x00, sizeof(aim_userinfo_t));

      /*
       * Screen name.  Stored as an unterminated string prepended with a 
       * byte containing its length.
       */
      snlen = aimbs_get8(bs);
      aimbs_getrawbuf(bs, outinfo->sn, snlen);

      /*
       * Warning Level.  Stored as an unsigned short.
       */
      outinfo->warnlevel = aimbs_get16(bs);

      /*
       * TLV Count. Unsigned short representing the number of 
       * Type-Length-Value triples that follow.
       */
      tlvcnt = aimbs_get16(bs);

      /* 
       * Parse out the Type-Length-Value triples as they're found.
       */
      for (curtlv = 0; curtlv < tlvcnt; curtlv++) {
            int endpos;
            fu16_t type, length;

            type = aimbs_get16(bs);
            length = aimbs_get16(bs);

            endpos = aim_bstream_curpos(bs) + length;

            if (type == 0x0001) {
                  /*
                   * Type = 0x0001: User flags
                   * 
                   * Specified as any of the following ORed together:
                   *      0x0001  Trial (user less than 60days)
                   *      0x0002  Unknown bit 2
                   *      0x0004  AOL Main Service user
                   *      0x0008  Unknown bit 4
                   *      0x0010  Free (AIM) user 
                   *      0x0020  Away
                   *      0x0400  ActiveBuddy
                   *
                   */
                  outinfo->flags = aimbs_get16(bs);

            } else if (type == 0x0002) {
                  /*
                   * Type = 0x0002: Member-Since date. 
                   *
                   * The time/date that the user originally registered for
                   * the service, stored in time_t format.
                   */
                  outinfo->membersince = aimbs_get32(bs);

            } else if (type == 0x0003) {
                  /*
                   * Type = 0x0003: On-Since date.
                   *
                   * The time/date that the user started their current 
                   * session, stored in time_t format.
                   */
                  outinfo->onlinesince = aimbs_get32(bs);

            } else if (type == 0x0004) {
                  /*
                   * Type = 0x0004: Idle time.
                   *
                   * Number of seconds since the user actively used the 
                   * service.
                   *
                   * Note that the client tells the server when to start
                   * counting idle times, so this may or may not be 
                   * related to reality.
                   */
                  outinfo->idletime = aimbs_get16(bs);

            } else if (type == 0x0006) {
                  /*
                   * Type = 0x0006: ICQ Online Status
                   *
                   * ICQ's Away/DND/etc "enriched" status. Some decoding 
                   * of values done by Scott <darkagl@pcnet.com>
                   */
                  aimbs_get16(bs);
                  outinfo->icqinfo.status = aimbs_get16(bs);

            } else if (type == 0x000a) {
                  /*
                   * Type = 0x000a
                   *
                   * ICQ User IP Address.
                   * Ahh, the joy of ICQ security.
                   */
                  outinfo->icqinfo.ipaddr = aimbs_get32(bs);

            } else if (type == 0x000c) {
                  /* 
                   * Type = 0x000c
                   *
                   * random crap containing the IP address,
                   * apparently a port number, and some Other Stuff.
                   *
                   */
                  aimbs_getrawbuf(bs, outinfo->icqinfo.crap, 0x25);

            } else if (type == 0x000d) {
                  /*
                   * Type = 0x000d
                   *
                   * Capability information.
                   *
                   */
                  outinfo->capabilities = aim_getcap(sess, bs, length);
                  outinfo->capspresent = 1;

            } else if (type == 0x000e) {
                  /*
                   * Type = 0x000e
                   *
                   * Unknown.  Always of zero length, and always only
                   * on AOL users.
                   *
                   * Ignore.
                   *
                   */

            } else if ((type == 0x000f) || (type == 0x0010)) {
                  /*
                   * Type = 0x000f: Session Length. (AIM)
                   * Type = 0x0010: Session Length. (AOL)
                   *
                   * The duration, in seconds, of the user's current 
                   * session.
                   *
                   * Which TLV type this comes in depends on the
                   * service the user is using (AIM or AOL).
                   *
                   */
                  outinfo->sessionlen = aimbs_get32(bs);

            } else {

                  /*
                   * Reaching here indicates that either AOL has
                   * added yet another TLV for us to deal with, 
                   * or the parsing has gone Terribly Wrong.
                   *
                   * Either way, inform the owner and attempt
                   * recovery.
                   *
                   */
                  faimdprintf(sess, 0, "userinfo: **warning: unexpected TLV:\n");
                  faimdprintf(sess, 0, "userinfo:   sn    =%s\n", outinfo->sn);
                  faimdprintf(sess, 0, "userinfo:   type  =0x%04x\n",type);
                  faimdprintf(sess, 0, "userinfo:   length=0x%04x\n", length);

            }

            /* Save ourselves. */
            aim_bstream_setpos(bs, endpos);
      }

      return 0;
}

/*
 * Inverse of aim_extractuserinfo()
 */
faim_internal int aim_putuserinfo(aim_bstream_t *bs, aim_userinfo_t *info)
{
      aim_tlvlist_t *tlvlist = NULL;

      if (!bs || !info)
            return -EINVAL;

      aimbs_put8(bs, strlen(info->sn));
      aimbs_putraw(bs, info->sn, strlen(info->sn));

      aimbs_put16(bs, info->warnlevel);


      aim_addtlvtochain16(&tlvlist, 0x0001, info->flags);
      aim_addtlvtochain32(&tlvlist, 0x0002, info->membersince);
      aim_addtlvtochain32(&tlvlist, 0x0003, info->onlinesince);
      aim_addtlvtochain16(&tlvlist, 0x0004, info->idletime);

#if ICQ_OSCAR_SUPPORT
      if (atoi(info->sn) != 0) {
            aim_addtlvtochain16(&tlvlist, 0x0006, info->icqinfo.status);
            aim_addtlvtochain32(&tlvlist, 0x000a, info->icqinfo.ipaddr);
      }
#endif

      aim_addtlvtochain_caps(&tlvlist, 0x000d, info->capabilities);

      aim_addtlvtochain32(&tlvlist, (fu16_t)((info->flags & AIM_FLAG_AOL) ? 0x0010 : 0x000f), info->sessionlen);

      aimbs_put16(bs, aim_counttlvchain(&tlvlist));
      aim_writetlvchain(bs, &tlvlist);
      aim_freetlvchain(&tlvlist);

      return 0;
}

faim_export int aim_sendbuddyoncoming(aim_session_t *sess, aim_conn_t *conn, aim_userinfo_t *info)
{
      aim_frame_t *fr;
      aim_snacid_t snacid;

      if (!sess || !conn || !info)
            return -EINVAL;

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

      snacid = aim_cachesnac(sess, 0x0003, 0x000b, 0x0000, NULL, 0);
      
      aim_putsnac(&fr->data, 0x0003, 0x000b, 0x0000, snacid);
      aim_putuserinfo(&fr->data, info);

      aim_tx_enqueue(sess, fr);

      return 0;
}

faim_export int aim_sendbuddyoffgoing(aim_session_t *sess, aim_conn_t *conn, const char *sn)
{
      aim_frame_t *fr;
      aim_snacid_t snacid;

      if (!sess || !conn || !sn)
            return -EINVAL;

      if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 10+1+strlen(sn))))
            return -ENOMEM;

      snacid = aim_cachesnac(sess, 0x0003, 0x000c, 0x0000, NULL, 0);
      
      aim_putsnac(&fr->data, 0x0003, 0x000c, 0x0000, snacid);
      aimbs_put8(&fr->data, strlen(sn));
      aimbs_putraw(&fr->data, sn, strlen(sn));

      aim_tx_enqueue(sess, fr);

      return 0;
}

/*
 * Huh? What is this?
 */
faim_export int aim_0002_000b(aim_session_t *sess, aim_conn_t *conn, const char *sn)
{
      aim_frame_t *fr;
      aim_snacid_t snacid;

      if (!sess || !conn || !sn)
            return -EINVAL;

      if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 10+1+strlen(sn))))
            return -ENOMEM;

      snacid = aim_cachesnac(sess, 0x0002, 0x000b, 0x0000, NULL, 0);
      
      aim_putsnac(&fr->data, 0x0002, 0x000b, 0x0000, snacid);
      aimbs_put8(&fr->data, strlen(sn));
      aimbs_putraw(&fr->data, sn, strlen(sn));

      aim_tx_enqueue(sess, fr);

      return 0;
}

/*
 * Normally contains:
 *   t(0001)  - short containing max profile length (value = 1024)
 *   t(0002)  - short - unknown (value = 16) [max MIME type length?]
 *   t(0003)  - short - unknown (value = 10)
 */
static int rights(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
{
      aim_tlvlist_t *tlvlist;
      aim_rxcallback_t userfunc;
      int ret = 0;
      fu16_t maxsiglen = 0;

      tlvlist = aim_readtlvchain(bs);

      if (aim_gettlv(tlvlist, 0x0001, 1))
            maxsiglen = aim_gettlv16(tlvlist, 0x0001, 1);

      if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
            ret = userfunc(sess, rx, maxsiglen);

      aim_freetlvchain(&tlvlist);

      return ret;
}

static int userinfo(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
{
      aim_userinfo_t userinfo;
      char *text_encoding = NULL, *text = NULL;
      aim_rxcallback_t userfunc;
      aim_tlvlist_t *tlvlist;
      aim_snac_t *origsnac = NULL;
      struct aim_priv_inforeq *inforeq;
      int ret = 0;

      origsnac = aim_remsnac(sess, snac->id);

      if (!origsnac || !origsnac->data) {
            faimdprintf(sess, 0, "parse_userinfo_middle: major problem: no snac stored!\n");
            return 0;
      }

      inforeq = (struct aim_priv_inforeq *)origsnac->data;

      if ((inforeq->infotype != AIM_GETINFO_GENERALINFO) &&
                  (inforeq->infotype != AIM_GETINFO_AWAYMESSAGE)) {
            faimdprintf(sess, 0, "parse_userinfo_middle: unknown infotype in request! (0x%04x)\n", inforeq->infotype);
            return 0;
      }

      aim_extractuserinfo(sess, bs, &userinfo);

      tlvlist = aim_readtlvchain(bs);

      /* 
       * Depending on what informational text was requested, different
       * TLVs will appear here.
       *
       * Profile will be 1 and 2, away message will be 3 and 4.
       */
      if (aim_gettlv(tlvlist, 0x0001, 1)) {
            text_encoding = aim_gettlv_str(tlvlist, 0x0001, 1);
            text = aim_gettlv_str(tlvlist, 0x0002, 1);
      } else if (aim_gettlv(tlvlist, 0x0003, 1)) {
            text_encoding = aim_gettlv_str(tlvlist, 0x0003, 1);
            text = aim_gettlv_str(tlvlist, 0x0004, 1);
      }

      if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
            ret = userfunc(sess, rx, &userinfo, text_encoding, text, inforeq->infotype);

      free(text_encoding);
      free(text);

      aim_freetlvchain(&tlvlist);

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

      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 == 0x0003)
            return rights(sess, mod, rx, snac, bs);
      else if (snac->subtype == 0x0006)
            return userinfo(sess, mod, rx, snac, bs);

      return 0;
}

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

      mod->family = 0x0002;
      mod->version = 0x0001;
      mod->toolid = 0x0101;
      mod->toolversion = 0x047b;
      mod->flags = 0;
      strncpy(mod->name, "locate", sizeof(mod->name));
      mod->snachandler = snachandler;

      return 0;
}

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