source: protocols/oscar/info.c @ 106f19c

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

#include <aim.h>
#include "info.h"

struct aim_priv_inforeq {
        char sn[MAXSNLEN+1];
        guint16 infotype;
};

int aim_getinfo(aim_session_t *sess, aim_conn_t *conn, const char *sn, guint16 infotype)
{
        struct aim_priv_inforeq privdata;
        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, 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, (guint8 *)sn, strlen(sn));

        aim_tx_enqueue(sess, fr);

        return 0;
}

/*
 * Capability blocks. 
 *
 * These are CLSIDs. They should actually be of the form:
 *
 * {0x0946134b, 0x4c7f, 0x11d1,
 *  {0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}}},
 *
 * But, eh.
 */
static const struct {
        guint32 flag;
        guint8 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}},

    /*
     * Client supports channel 2 extended, TLV(0x2711) based messages.
     * Currently used only by ICQ clients. ICQ clients and clones use this GUID
     * as message format sign. Trillian client use another GUID in channel 2
     * messages to implement its own message format (trillian doesn't use
     * TLV(x2711) in SecureIM channel 2 messages!).
     */
        {AIM_CAPS_ICQSERVERRELAY,
         {0x09, 0x46, 0x13, 0x49, 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_UTF8,
         {0x09, 0x46, 0x13, 0x4E, 0x4C, 0x7F, 0x11, 0xD1,
          0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

        {AIM_CAPS_ICQRTF,
         {0x97, 0xb1, 0x27, 0x51, 0x24, 0x3c, 0x43, 0x34, 
          0xad, 0x22, 0xd6, 0xab, 0xf7, 0x3f, 0x14, 0x92}},

        {AIM_CAPS_ICQUNKNOWN,
         {0x2e, 0x7a, 0x64, 0x75, 0xfa, 0xdf, 0x4d, 0xc8,
          0x88, 0x6f, 0xea, 0x35, 0x95, 0xfd, 0xb6, 0xdf}},

        {AIM_CAPS_EMPTY,
         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},

        {AIM_CAPS_TRILLIANCRYPT,
         {0xf2, 0xe7, 0xc7, 0xf4, 0xfe, 0xad, 0x4d, 0xfb,
          0xb2, 0x35, 0x36, 0x79, 0x8b, 0xdf, 0x00, 0x00}},

        {AIM_CAPS_APINFO, 
     {0xAA, 0x4A, 0x32, 0xB5, 0xF8, 0x84, 0x48, 0xc6,
      0xA3, 0xD7, 0x8C, 0x50, 0x97, 0x19, 0xFD, 0x5B}},

        {AIM_CAPS_INTEROP,
         {0x09, 0x46, 0x13, 0x4d, 0x4c, 0x7f, 0x11, 0xd1,
          0x82, 0x22, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00}},

        {AIM_CAPS_ICHAT,
         {0x09, 0x46, 0x00, 0x00, 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.
 * 
 */
guint32 aim_getcap(aim_session_t *sess, aim_bstream_t *bs, int len)
{
        guint32 flags = 0;
        int offset;

        for (offset = 0; aim_bstream_empty(bs) && (offset < len); offset += 0x10) {
                guint8 *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) {
                        /*FIXME*/
                        /*REMOVEME :-)
                        g_strdup_printf("unknown capability: {%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x}\n",
                                        cap[0], cap[1], cap[2], cap[3],
                                        cap[4], cap[5],
                                        cap[6], cap[7],
                                        cap[8], cap[9],
                                        cap[10], cap[11], cap[12], cap[13],
                                        cap[14], cap[15]);
                        */
                }

                g_free(cap);
        }

        return flags;
}

int aim_putcap(aim_bstream_t *bs, guint32 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.
 */
int aim_extractuserinfo(aim_session_t *sess, aim_bstream_t *bs, aim_userinfo_t *outinfo)
{
        int curtlv, tlvcnt;
        guint8 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, (guint8 *)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;
                guint16 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);
                        outinfo->present |= AIM_USERINFO_PRESENT_FLAGS;

                } 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);
                        outinfo->present |= AIM_USERINFO_PRESENT_MEMBERSINCE;

                } 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);
                        outinfo->present |= AIM_USERINFO_PRESENT_ONLINESINCE;

                } 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);
                        outinfo->present |= AIM_USERINFO_PRESENT_IDLE;

                } 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);
                        outinfo->present |= AIM_USERINFO_PRESENT_ICQEXTSTATUS;

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

                } 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);
                        outinfo->present |= AIM_USERINFO_PRESENT_ICQDATA;

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

                } 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);
                        outinfo->present |= AIM_USERINFO_PRESENT_SESSIONLEN;

                } 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.
                         *
                         */
#ifdef DEBUG
                        // imcb_error(sess->aux_data, G_STRLOC);
#endif

                }

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

        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)
 *   t(0004)  - short - unknown (value = 2048) [ICQ only?]
 */
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;
        guint16 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;
        guint16 text_length = 0;
        aim_rxcallback_t userfunc;
        aim_tlvlist_t *tlvlist;
        aim_tlv_t *tlv;
        aim_snac_t *origsnac = NULL;
        struct aim_priv_inforeq *inforeq;
        int ret = 0;

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

        if (!origsnac || !origsnac->data) {
                imcb_error(sess->aux_data, "major problem: no snac stored!");
                return 0;
        }

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

        if ((inforeq->infotype != AIM_GETINFO_GENERALINFO) &&
                        (inforeq->infotype != AIM_GETINFO_AWAYMESSAGE) &&
                        (inforeq->infotype != AIM_GETINFO_CAPABILITIES)) {
                imcb_error(sess->aux_data, "unknown infotype in request!");
                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, caps
         * will be 5.
         */
        if (inforeq->infotype == AIM_GETINFO_GENERALINFO) {
                text_encoding = aim_gettlv_str(tlvlist, 0x0001, 1);
                if((tlv = aim_gettlv(tlvlist, 0x0002, 1))) {
                        text = g_new0(char, tlv->length);
                        memcpy(text, tlv->value, tlv->length);
                        text_length = tlv->length;
                }
        } else if (inforeq->infotype == AIM_GETINFO_AWAYMESSAGE) {
                text_encoding = aim_gettlv_str(tlvlist, 0x0003, 1);
                if((tlv = aim_gettlv(tlvlist, 0x0004, 1))) {
                        text = g_new0(char, tlv->length);
                        memcpy(text, tlv->value, tlv->length);
                        text_length = tlv->length;
                }
        } else if (inforeq->infotype == AIM_GETINFO_CAPABILITIES) {
                aim_tlv_t *ct;

                if ((ct = aim_gettlv(tlvlist, 0x0005, 1))) {
                        aim_bstream_t cbs;

                        aim_bstream_init(&cbs, ct->value, ct->length);

                        userinfo.capabilities = aim_getcap(sess, &cbs, ct->length);
                        userinfo.present = AIM_USERINFO_PRESENT_CAPABILITIES;
                }
        }

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

        g_free(text_encoding);
        g_free(text);

        aim_freetlvchain(&tlvlist);

        if (origsnac)
                g_free(origsnac->data);
        g_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;
}

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

        mod->family = 0x0002;
        mod->version = 0x0001;
        mod->toolid = 0x0110;
        mod->toolversion = 0x0629;
        mod->flags = 0;
        strncpy(mod->name, "locate", sizeof(mod->name));
        mod->snachandler = snachandler;

        return 0;
}