void byte_stream_rewind(ByteStream *bs)
{
byte_stream_setpos(bs, 0);
return;
}
/*
* AIM is fairly regular about providing user info. This is a generic
* routine to extract it in its standard form.
*/
int
aim_info_extract(OscarData *od, ByteStream *bs, aim_userinfo_t *outinfo)
{
int curtlv, tlvcnt;
guint8 bnlen;
if (!bs || !outinfo)
return -EINVAL;
/* Clear out old data first */
memset(outinfo, 0x00, sizeof(aim_userinfo_t));
/*
* Username. Stored as an unterminated string prepended with a
* byte containing its length.
*/
bnlen = byte_stream_get8(bs);
outinfo->bn = byte_stream_getstr(bs, bnlen);
/*
* Warning Level. Stored as an unsigned short.
*/
outinfo->warnlevel = byte_stream_get16(bs);
/*
* TLV Count. Unsigned short representing the number of
* Type-Length-Value triples that follow.
*/
tlvcnt = byte_stream_get16(bs);
/*
* Parse out the Type-Length-Value triples as they're found.
*/
for (curtlv = 0; curtlv < tlvcnt; curtlv++) {
guint16 type, length;
int endpos;
type = byte_stream_get16(bs);
length = byte_stream_get16(bs);
endpos = byte_stream_curpos(bs) + MIN(length, byte_stream_empty(bs));
if (type == 0x0001) {
/*
* User flags
*
* Specified as any of the following ORed together:
* 0x0001 Unconfirmed account
* 0x0002 Unknown bit 2
* 0x0004 AOL Main Service user
* 0x0008 Unknown bit 4
* 0x0010 Free (AIM) user
* 0x0020 Away
* 0x0040 ICQ user (AIM bit also set)
* 0x0080 Mobile device
* 0x0400 Bot (like ActiveBuddy)
*/
outinfo->flags = byte_stream_get16(bs);
outinfo->present |= AIM_USERINFO_PRESENT_FLAGS;
} else if (type == 0x0002) {
/*
* Account creation time
*
* The time/date that the user originally registered for
* the service, stored in time_t format.
*
* I'm not sure how this differs from type 5 ("member
* since").
*
* Note: This is the field formerly known as "member
* since". All these years and I finally found out
* that I got the name wrong.
*/
outinfo->createtime = byte_stream_get32(bs);
outinfo->present |= AIM_USERINFO_PRESENT_CREATETIME;
} else if (type == 0x0003) {
/*
* On-Since date
*
* The time/date that the user started their current
* session, stored in time_t format.
*/
outinfo->onlinesince = byte_stream_get32(bs);
outinfo->present |= AIM_USERINFO_PRESENT_ONLINESINCE;
} else if (type == 0x0004) {
/*
* Idle time
*
* Number of minutes 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 = byte_stream_get16(bs);
outinfo->present |= AIM_USERINFO_PRESENT_IDLE;
} else if (type == 0x0005) {
/*
* Member since date
*
* The time/date that the user originally registered for
* the service, stored in time_t format.
*
* This is sometimes sent instead of type 2 ("account
* creation time"), particularly in the self-info.
* And particularly for ICQ?
*/
outinfo->membersince = byte_stream_get32(bs);
outinfo->present |= AIM_USERINFO_PRESENT_MEMBERSINCE;
} else if (type == 0x0006) {
/*
* ICQ Online Status
*
* ICQ's Away/DND/etc "enriched" status. Some decoding
* of values done by Scott <*****@*****.**>
*/
byte_stream_get16(bs);
outinfo->icqinfo.status = byte_stream_get16(bs);
outinfo->present |= AIM_USERINFO_PRESENT_ICQEXTSTATUS;
} else if (type == 0x0008) {
/*
* Client type, or some such.
*/
} else if (type == 0x000a) {
/*
* ICQ User IP Address
*
* Ahh, the joy of ICQ security.
*/
outinfo->icqinfo.ipaddr = byte_stream_get32(bs);
outinfo->present |= AIM_USERINFO_PRESENT_ICQIPADDR;
} else if (type == 0x000c) {
/*
* Random crap containing the IP address,
* apparently a port number, and some Other Stuff.
*
* Format is:
* 4 bytes - Our IP address, 0xc0 a8 01 2b for 192.168.1.43
*/
byte_stream_getrawbuf(bs, outinfo->icqinfo.crap, 0x25);
outinfo->present |= AIM_USERINFO_PRESENT_ICQDATA;
} else if (type == 0x000d) {
/*
* OSCAR Capability information
*/
outinfo->capabilities |= aim_locate_getcaps(od, bs, length);
outinfo->present |= AIM_USERINFO_PRESENT_CAPABILITIES;
} else if (type == 0x000e) {
/*
* AOL capability information
*/
} 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 = byte_stream_get32(bs);
outinfo->present |= AIM_USERINFO_PRESENT_SESSIONLEN;
} else if (type == 0x0014) {
/*
* My instance number.
*/
guint8 instance_number;
instance_number = byte_stream_get8(bs);
} else if (type == 0x0019) {
/*
* OSCAR short capability information. A shortened
* form of the normal capabilities.
*/
outinfo->capabilities |= aim_locate_getcaps_short(od, bs, length);
outinfo->present |= AIM_USERINFO_PRESENT_CAPABILITIES;
} else if (type == 0x001a) {
/*
* Type = 0x001a
*
* AOL short capability information. A shortened
* form of the normal capabilities.
*/
} else if (type == 0x001b) {
/*
* Encryption certification MD5 checksum.
*/
} else if (type == 0x001d) {
/*
* Buddy icon information and status/available messages.
*
* This almost seems like the AIM protocol guys gave
* the iChat guys a Type, and the iChat guys tried to
* cram as much cool shit into it as possible. Then
* the Windows AIM guys were like, "hey, that's
* pretty neat, let's copy those prawns."
*
* In that spirit, this can contain a custom message,
* kind of like an away message, but you're not away
* (it's called an "available" message). Or it can
* contain information about the buddy icon the user
* has stored on the server.
*/
guint16 type2;
guint8 number2, length2;
int endpos2;
/*
* Continue looping as long as we're able to read type2,
* number2, and length2.
*/
while (byte_stream_curpos(bs) + 4 <= endpos) {
type2 = byte_stream_get16(bs);
number2 = byte_stream_get8(bs);
length2 = byte_stream_get8(bs);
endpos2 = byte_stream_curpos(bs) + MIN(length2, byte_stream_empty(bs));
switch (type2) {
case 0x0000: { /* This is an official buddy icon? */
/* This is always 5 bytes of "0x02 01 d2 04 72"? */
} break;
case 0x0001: { /* A buddy icon checksum */
if ((length2 > 0) && ((number2 == 0x00) || (number2 == 0x01))) {
g_free(outinfo->iconcsum);
outinfo->iconcsumtype = number2;
outinfo->iconcsum = byte_stream_getraw(bs, length2);
outinfo->iconcsumlen = length2;
}
} break;
case 0x0002: { /* A status/available message */
g_free(outinfo->status);
g_free(outinfo->status_encoding);
if (length2 >= 4) {
outinfo->status_len = byte_stream_get16(bs);
outinfo->status = byte_stream_getstr(bs, outinfo->status_len);
if (byte_stream_get16(bs) == 0x0001) { /* We have an encoding */
byte_stream_get16(bs);
outinfo->status_encoding = byte_stream_getstr(bs, byte_stream_get16(bs));
} else {
/* No explicit encoding, client should use UTF-8 */
outinfo->status_encoding = NULL;
}
} else {
byte_stream_advance(bs, length2);
outinfo->status_len = 0;
outinfo->status = g_strdup("");
outinfo->status_encoding = NULL;
}
} break;
case 0x0009: { /* An iTunes Music Store link */
g_free(outinfo->itmsurl);
g_free(outinfo->itmsurl_encoding);
if (length2 >= 4) {
outinfo->itmsurl_len = byte_stream_get16(bs);
outinfo->itmsurl = byte_stream_getstr(bs, outinfo->itmsurl_len);
if (byte_stream_get16(bs) == 0x0001) {
/* We have an encoding */
byte_stream_get16(bs);
outinfo->itmsurl_encoding = byte_stream_getstr(bs, byte_stream_get16(bs));
} else {
/* No explicit encoding, client should use UTF-8 */
outinfo->itmsurl_encoding = NULL;
}
} else {
byte_stream_advance(bs, length2);
outinfo->itmsurl_len = 0;
outinfo->itmsurl = g_strdup("");
outinfo->itmsurl_encoding = NULL;
}
} break;
}
/* Save ourselves. */
byte_stream_setpos(bs, endpos2);
}
} else if (type == 0x001e) {
/*
* Always four bytes, but it doesn't look like an int.
*/
} else if (type == 0x001f) {
/*
* Upper bytes of user flags. Can be any size
*
* Seen on a buddy using DeadAIM. Data was 4 bytes:
* 0x00 00 00 10
*/
} else if (type == 0x0023) {
/*
* Last Buddy Feed update time, in seconds since the epoch.
*/
} else if (type == 0x0026) {
/*
* Time that the profile was set, in seconds since the epoch.
*/
} else if (type == 0x0027) {
/*
* Time that the away message was set, in seconds since the epoch.
*/
} else if (type == 0x002a) {
/*
* Country code based on GeoIP data.
*/
} 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 LOG_UNKNOWN_TLV
purple_debug_misc("oscar", "userinfo: **warning: unexpected TLV:\n");
purple_debug_misc("oscar", "userinfo: bn =%s\n", outinfo->bn);
dumptlv(od, type, bs, length);
#endif
}
/* Save ourselves. */
byte_stream_setpos(bs, endpos);
}
aim_locate_adduserinfo(od, outinfo);
return 0;
}
