* supposed to be layed out. Most obviously, tlvlists should be used
* instead of writing out the bytes manually.
*
- * XXX support multipart
+ * XXX more precise verification that we never send SNACs larger than 8192
+ * XXX check SNAC size for multipart
*
*/
faim_export int aim_send_im_ext(aim_session_t *sess, aim_conn_t *conn, struct aim_sendimext_args *args)
if (!sess || !conn || !args)
return -EINVAL;
- if (!args->msg || (args->msglen <= 0))
- return -EINVAL;
+ if (args->flags & AIM_IMFLAGS_MULTIPART) {
+ if (args->mpmsg->numparts <= 0)
+ return -EINVAL;
+ } else {
+ if (!args->msg || (args->msglen <= 0))
+ return -EINVAL;
+
+ if (args->msglen >= MAXMSGLEN)
+ return -E2BIG;
+ }
- if (args->msglen >= MAXMSGLEN)
- return -E2BIG;
+ /* Painfully calculate the size of the message TLV */
+ msgtlvlen = 1 + 1; /* 0501 */
- msgtlvlen = 12 + args->msglen;
if (args->flags & AIM_IMFLAGS_CUSTOMFEATURES)
- msgtlvlen += args->featureslen;
+ msgtlvlen += 2 + args->featureslen;
else
- msgtlvlen += sizeof(deffeatures);
-
- if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, args->msglen+512)))
+ msgtlvlen += 2 + sizeof(deffeatures);
+
+ if (args->flags & AIM_IMFLAGS_MULTIPART) {
+ aim_mpmsg_section_t *sec;
+
+ for (sec = args->mpmsg->parts; sec; sec = sec->next) {
+ msgtlvlen += 2 /* 0101 */ + 2 /* block len */;
+ msgtlvlen += 4 /* charset */ + sec->datalen;
+ }
+
+ } else {
+ msgtlvlen += 2 /* 0101 */ + 2 /* block len */;
+ msgtlvlen += 4 /* charset */ + args->msglen;
+ }
+
+
+ if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, msgtlvlen+128)))
return -ENOMEM;
/* XXX should be optional */
aimbs_putraw(&fr->data, deffeatures, sizeof(deffeatures));
}
- aimbs_put16(&fr->data, 0x0101);
+ if (args->flags & AIM_IMFLAGS_MULTIPART) {
+ aim_mpmsg_section_t *sec;
- /*
- * Message block length.
- */
- aimbs_put16(&fr->data, args->msglen + 0x04);
+ for (sec = args->mpmsg->parts; sec; sec = sec->next) {
+ aimbs_put16(&fr->data, 0x0101);
+ aimbs_put16(&fr->data, sec->datalen + 4);
+ aimbs_put16(&fr->data, sec->charset);
+ aimbs_put16(&fr->data, sec->charsubset);
+ aimbs_putraw(&fr->data, sec->data, sec->datalen);
+ }
- /*
- * Character set.
- */
- if (args->flags & AIM_IMFLAGS_UNICODE)
- aimbs_put16(&fr->data, 0x0002);
- else if (args->flags & AIM_IMFLAGS_ISO_8859_1)
- aimbs_put16(&fr->data, 0x0003);
- else
- aimbs_put16(&fr->data, 0x0000);
+ } else {
- aimbs_put16(&fr->data, 0x0000);
+ aimbs_put16(&fr->data, 0x0101);
- /*
- * Message. Not terminated.
- */
- aimbs_putraw(&fr->data, args->msg, args->msglen);
+ /*
+ * Message block length.
+ */
+ aimbs_put16(&fr->data, args->msglen + 0x04);
+
+ /*
+ * Character set.
+ */
+ if (args->flags & AIM_IMFLAGS_CUSTOMCHARSET) {
+
+ aimbs_put16(&fr->data, args->charset);
+ aimbs_put16(&fr->data, args->charsubset);
+
+ } else {
+ if (args->flags & AIM_IMFLAGS_UNICODE)
+ aimbs_put16(&fr->data, 0x0002);
+ else if (args->flags & AIM_IMFLAGS_ISO_8859_1)
+ aimbs_put16(&fr->data, 0x0003);
+ else
+ aimbs_put16(&fr->data, 0x0000);
+
+ aimbs_put16(&fr->data, 0x0000);
+ }
+
+ /*
+ * Message. Not terminated.
+ */
+ aimbs_putraw(&fr->data, args->msg, args->msglen);
+ }
/*
* Set the Request Acknowledge flag.
args.msglen = strlen(msg);
/* Make these don't get set by accident -- they need aim_send_im_ext */
- args.flags &= ~(AIM_IMFLAGS_CUSTOMFEATURES | AIM_IMFLAGS_HASICON);
+ args.flags &= ~(AIM_IMFLAGS_CUSTOMFEATURES | AIM_IMFLAGS_HASICON | AIM_IMFLAGS_MULTIPART);
return aim_send_im_ext(sess, conn, &args);
}
/*
- * This is also performance sensative. (If you can believe it...)
+ * This is also performance sensitive. (If you can believe it...)
*
*/
faim_export int aim_send_icon(aim_session_t *sess, aim_conn_t *conn, const char *sn, const fu8_t *icon, int iconlen, time_t stamp, fu32_t iconsum)
return ret;
}
+/*
+ * Ahh, the joys of nearly ridiculous over-engineering.
+ *
+ * Not only do AIM ICBM's support multiple channels. Not only do they
+ * support multiple character sets. But they support multiple character
+ * sets / encodings within the same ICBM.
+ *
+ * These multipart messages allow for complex space savings techniques, which
+ * seem utterly unnecessary by today's standards. In fact, there is only
+ * one client still in popular use that still uses this method: AOL for the
+ * Macintosh, Version 5.0. Obscure, yes, I know.
+ *
+ * In modern (non-"legacy") clients, if the user tries to send a character
+ * that is not ISO-8859-1 or ASCII, the client will send the entire message
+ * as UNICODE, meaning that every character in the message will occupy the
+ * full 16 bit UNICODE field, even if the high order byte would be zero.
+ * Multipart messages prevent this wasted space by allowing the client to
+ * only send the characters in UNICODE that need to be sent that way, and
+ * the rest of the message can be sent in whatever the native character
+ * set is (probably ASCII).
+ *
+ * An important note is that sections will be displayed in the order that
+ * they appear in the ICBM. There is no facility for merging or rearranging
+ * sections at run time. So if you have, say, ASCII then UNICODE then ASCII,
+ * you must supply two ASCII sections with a UNICODE in the middle, and incur
+ * the associated overhead.
+ *
+ * Normally I would have laughed and given a firm 'no' to supporting this
+ * seldom-used feature, but something is attracting me to it. In the future,
+ * it may be possible to abuse this to send mixed-media messages to other
+ * open source clients (like encryption or something) -- see faimtest for
+ * examples of how to do this.
+ *
+ * I would definitly recommend avoiding this feature unless you really
+ * know what you are doing, and/or you have something neat to do with it.
+ *
+ */
+faim_export int aim_mpmsg_init(aim_session_t *sess, aim_mpmsg_t *mpm)
+{
+
+ memset(mpm, 0, sizeof(aim_mpmsg_t));
+
+ return 0;
+}
+
+static int mpmsg_addsection(aim_session_t *sess, aim_mpmsg_t *mpm, fu16_t charset, fu16_t charsubset, fu8_t *data, fu16_t datalen)
+{
+ aim_mpmsg_section_t *sec;
+
+ if (!(sec = malloc(sizeof(aim_mpmsg_section_t))))
+ return -1;
+
+ sec->charset = charset;
+ sec->charsubset = charsubset;
+ sec->data = data;
+ sec->datalen = datalen;
+ sec->next = NULL;
+
+ if (!mpm->parts)
+ mpm->parts = sec;
+ else {
+ aim_mpmsg_section_t *cur;
+
+ for (cur = mpm->parts; cur->next; cur = cur->next)
+ ;
+ cur->next = sec;
+ }
+
+ mpm->numparts++;
+
+ return 0;
+}
+
+faim_export int aim_mpmsg_addraw(aim_session_t *sess, aim_mpmsg_t *mpm, fu16_t charset, fu16_t charsubset, const fu8_t *data, fu16_t datalen)
+{
+ fu8_t *dup;
+
+ if (!(dup = malloc(datalen)))
+ return -1;
+ memcpy(dup, data, datalen);
+
+ if (mpmsg_addsection(sess, mpm, charset, charsubset, dup, datalen) == -1) {
+ free(dup);
+ return -1;
+ }
+
+ return 0;
+}
+
+/* XXX should provide a way of saying ISO-8859-1 specifically */
+faim_export int aim_mpmsg_addascii(aim_session_t *sess, aim_mpmsg_t *mpm, const char *ascii)
+{
+ fu8_t *dup;
+
+ if (!(dup = strdup(ascii)))
+ return -1;
+
+ if (mpmsg_addsection(sess, mpm, 0x0000, 0x0000, dup, strlen(ascii)) == -1) {
+ free(dup);
+ return -1;
+ }
+
+ return 0;
+}
+
+faim_export int aim_mpmsg_addunicode(aim_session_t *sess, aim_mpmsg_t *mpm, const fu16_t *unicode, fu16_t unicodelen)
+{
+ fu8_t *buf;
+ aim_bstream_t bs;
+ int i;
+
+ if (!(buf = malloc(unicodelen * 2)))
+ return -1;
+
+ aim_bstream_init(&bs, buf, unicodelen * 2);
+
+ /* We assume unicode is in /host/ byte order -- convert to network */
+ for (i = 0; i < unicodelen; i++)
+ aimbs_put16(&bs, unicode[i]);
+
+ if (mpmsg_addsection(sess, mpm, 0x0002, 0x0000, buf, aim_bstream_curpos(&bs)) == -1) {
+ free(buf);
+ return -1;
+ }
+
+ return 0;
+}
+
+faim_export void aim_mpmsg_free(aim_session_t *sess, aim_mpmsg_t *mpm)
+{
+ aim_mpmsg_section_t *cur;
+
+ for (cur = mpm->parts; cur; ) {
+ aim_mpmsg_section_t *tmp;
+
+ tmp = cur->next;
+ free(cur->data);
+ free(cur);
+ cur = tmp;
+ }
+
+ mpm->numparts = 0;
+ mpm->parts = NULL;
+
+ return;
+}
+
+/*
+ * Start by building the multipart structures, then pick the first
+ * human-readable section and stuff it into args->msg so no one gets
+ * suspicious.
+ *
+ */
+static int incomingim_ch1_parsemsgs(aim_session_t *sess, fu8_t *data, int len, struct aim_incomingim_ch1_args *args)
+{
+ static const fu16_t charsetpri[] = {
+ 0x0000, /* ASCII first */
+ 0x0003, /* then ISO-8859-1 */
+ 0x0002, /* UNICODE as last resort */
+ };
+ static const int charsetpricount = 3;
+ int i;
+ aim_bstream_t mbs;
+ aim_mpmsg_section_t *sec;
+
+ aim_bstream_init(&mbs, data, len);
+
+ while (aim_bstream_empty(&mbs)) {
+ fu16_t msglen, flag1, flag2;
+ fu8_t *msgbuf;
+
+ aimbs_get8(&mbs); /* 01 */
+ aimbs_get8(&mbs); /* 01 */
+
+ /* Message string length, including character set info. */
+ msglen = aimbs_get16(&mbs);
+
+ /* Character set info */
+ flag1 = aimbs_get16(&mbs);
+ flag2 = aimbs_get16(&mbs);
+
+ /* Message. */
+ msglen -= 4;
+
+ /*
+ * For now, we don't care what the encoding is. Just copy
+ * it into a multipart struct and deal with it later. However,
+ * always pad the ending with a NULL. This makes it easier
+ * to treat ASCII sections as strings. It won't matter for
+ * UNICODE or binary data, as you should never read past
+ * the specified data length, which will not include the pad.
+ *
+ * XXX There's an API bug here. For sending, the UNICODE is
+ * given in host byte order (aim_mpmsg_addunicode), but here
+ * the received messages are given in network byte order.
+ *
+ */
+ msgbuf = aimbs_getstr(&mbs, msglen);
+ mpmsg_addsection(sess, &args->mpmsg, flag1, flag2, msgbuf, msglen);
+
+ } /* while */
+
+ args->icbmflags |= AIM_IMFLAGS_MULTIPART; /* always set */
+
+ /*
+ * Clients that support multiparts should never use args->msg, as it
+ * will point to an arbitrary section.
+ *
+ * Here, we attempt to provide clients that do not support multipart
+ * messages with something to look at -- hopefully a human-readable
+ * string. But, failing that, a UNICODE message, or nothing at all.
+ *
+ * Which means that even if args->msg is NULL, it does not mean the
+ * message was blank.
+ *
+ */
+ for (i = 0; i < charsetpricount; i++) {
+ for (sec = args->mpmsg.parts; sec; sec = sec->next) {
+
+ if (sec->charset != charsetpri[i])
+ continue;
+
+ /* Great. We found one. Fill it in. */
+ args->charset = sec->charset;
+ args->charsubset = sec->charsubset;
+ args->icbmflags |= AIM_IMFLAGS_CUSTOMCHARSET;
+
+ /* Set up the simple flags */
+ if (args->charset == 0x0000)
+ ; /* ASCII */
+ else if (args->charset == 0x0002)
+ args->icbmflags |= AIM_IMFLAGS_UNICODE;
+ else if (args->charset == 0x0003)
+ args->icbmflags |= AIM_IMFLAGS_ISO_8859_1;
+ else if (args->charset == 0xffff)
+ ; /* no encoding (yeep!) */
+
+ if (args->charsubset == 0x0000)
+ ; /* standard subencoding? */
+ else if (args->charsubset == 0x000b)
+ args->icbmflags |= AIM_IMFLAGS_SUBENC_MACINTOSH;
+ else if (args->charsubset == 0xffff)
+ ; /* no subencoding */
+#if 0
+ /* XXX this isn't really necesary... */
+ if ( ((args.flag1 != 0x0000) &&
+ (args.flag1 != 0x0002) &&
+ (args.flag1 != 0x0003) &&
+ (args.flag1 != 0xffff)) ||
+ ((args.flag2 != 0x0000) &&
+ (args.flag2 != 0x000b) &&
+ (args.flag2 != 0xffff))) {
+ faimdprintf(sess, 0, "icbm: **warning: encoding flags are being used! {%04x, %04x}\n", args.flag1, args.flag2);
+ }
+#endif
+
+ args->msg = sec->data;
+ args->msglen = sec->datalen;
+
+ return 0;
+ }
+ }
+
+ /* No human-readable sections found. Oh well. */
+ args->charset = args->charsubset = 0xffff;
+ args->msg = NULL;
+ args->msglen = 0;
+
+ return 0;
+}
+
/*
*
* This should use tlvlists, but doesn't for performance reasons.
memset(&args, 0, sizeof(args));
+ aim_mpmsg_init(sess, &args.mpmsg);
+
/*
* This used to be done using tlvchains. For performance reasons,
* I've changed it to process the TLVs in-place. This avoids lots
aim_bstream_advance(bs, args.featureslen);
args.icbmflags |= AIM_IMFLAGS_CUSTOMFEATURES;
- aimbs_get8(bs); /* 01 */
- aimbs_get8(bs); /* 01 */
-
- /* Message string length, including flag words. */
- args.msglen = aimbs_get16(bs);
-
- /* Flag words. */
- args.flag1 = aimbs_get16(bs);
- if (args.flag1 == 0x0000)
- ; /* ASCII */
- else if (args.flag1 == 0x0002)
- args.icbmflags |= AIM_IMFLAGS_UNICODE;
- else if (args.flag1 == 0x0003)
- args.icbmflags |= AIM_IMFLAGS_ISO_8859_1;
- else if (args.flag1 == 0xffff)
- ; /* no encoding (yeep!) */
-
- args.flag2 = aimbs_get16(bs);
- if (args.flag2 == 0x0000)
- ; /* standard subencoding? */
- else if (args.flag2 == 0x000b)
- args.icbmflags |= AIM_IMFLAGS_SUBENC_MACINTOSH;
- else if (args.flag2 == 0xffff)
- ; /* no subencoding */
-
- /* XXX this isn't really necesary... */
- if ( ((args.flag1 != 0x0000) &&
- (args.flag1 != 0x0002) &&
- (args.flag1 != 0x0003) &&
- (args.flag1 != 0xffff)) ||
- ((args.flag2 != 0x0000) &&
- (args.flag2 != 0x000b) &&
- (args.flag2 != 0xffff))) {
- faimdprintf(sess, 0, "icbm: **warning: encoding flags are being used! {%04x, %04x}\n", args.flag1, args.flag2);
- }
-
- /* Message. */
- args.msglen -= 4;
- if (args.icbmflags & AIM_IMFLAGS_UNICODE) {
- fu8_t *umsg;
-
- /* Can't use getstr because of wide null */
- umsg = aimbs_getraw(bs, args.msglen);
- args.msg = malloc(args.msglen+2);
- memcpy(args.msg, umsg, args.msglen);
- args.msg[args.msglen] = '\0'; /* wide NULL */
- args.msg[args.msglen+1] = '\0';
-
- free(umsg);
-
- } else
- args.msg = aimbs_getstr(bs, args.msglen);
+ /*
+ * The rest of the TLV contains one or more message
+ * blocks...
+ */
+ incomingim_ch1_parsemsgs(sess, bs->data + bs->offset /* XXX evil!!! */, length - 2 - 2 - args.featureslen, &args);
} else if (type == 0x0003) { /* Server Ack Requested */
if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
ret = userfunc(sess, rx, channel, userinfo, &args);
+ aim_mpmsg_free(sess, &args.mpmsg);
free(args.extdata);
- free(args.msg);
return ret;
}
aim_send_im_ext(sess, conn, &args);
+ } else if (strstr(tmpstr, "sendbin")) {
+ struct aim_sendimext_args args;
+ static const unsigned char data[] = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+ };
+
+ /*
+ * I put this here as a demonstration of how to send
+ * arbitrary binary data via OSCAR ICBM's without the need
+ * for escape or baseN encoding of any sort.
+ *
+ * Apparently if you set the charset to something WinAIM
+ * doesn't recognize, it will completly ignore the message.
+ * That is, it will not display anything in the conversation
+ * window for the user that recieved it.
+ *
+ * HOWEVER, if they do not have a conversation window open
+ * for you, a new one will be created, but it will not have
+ * any messages in it. Therefore sending these things could
+ * be a great way to seemingly subliminally convince people
+ * to talk to you...
+ *
+ */
+ args.destsn = userinfo->sn;
+ args.flags = AIM_IMFLAGS_CUSTOMCHARSET;
+ args.charset = args.charsubset = 0x4242;
+ args.msg = data;
+ args.msglen = sizeof(data);
+
+ aim_send_im_ext(sess, conn, &args);
+
+ } else if (strstr(tmpstr, "sendmulti")) {
+ struct aim_sendimext_args args;
+ aim_mpmsg_t mpm;
+ static const fu16_t unidata[] = { /* "UNICODE." */
+ 0x0055, 0x004e, 0x0049, 0x0043,
+ 0x004f, 0x0044, 0x0045, 0x002e,
+ };
+ static const int unidatalen = 8;
+
+ /*
+ * This is how multipart messages should be sent.
+ *
+ * This should render as:
+ * "Part 1, ASCII. UNICODE.Part 3, ASCII. "
+ */
+
+ aim_mpmsg_init(sess, &mpm);
+
+ aim_mpmsg_addascii(sess, &mpm, "Part 1, ASCII. ");
+ aim_mpmsg_addunicode(sess, &mpm, unidata, unidatalen);
+ aim_mpmsg_addascii(sess, &mpm, "Part 3, ASCII. ");
+
+ args.destsn = userinfo->sn;
+ args.flags = AIM_IMFLAGS_MULTIPART;
+ args.mpmsg = &mpm;
+
+ aim_send_im_ext(sess, conn, &args);
+
+ aim_mpmsg_free(sess, &mpm);
+
+ } else if (strstr(tmpstr, "sendprebin")) {
+ static const unsigned char data[] = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+ };
+ struct aim_sendimext_args args;
+ aim_mpmsg_t mpm;
+
+ /*
+ * This demonstrates sending a human-readable preamble,
+ * and then arbitrary binary data.
+ *
+ * This means that you can very inconspicuously send binary
+ * attachments to other users. In WinAIM, this appears as
+ * though it only had the ASCII portion.
+ *
+ */
+
+ aim_mpmsg_init(sess, &mpm);
+
+ aim_mpmsg_addascii(sess, &mpm, "This message has binary data.");
+ aim_mpmsg_addraw(sess, &mpm, 0x4242, 0x4242, data, sizeof(data));
+
+ args.destsn = userinfo->sn;
+ args.flags = AIM_IMFLAGS_MULTIPART;
+ args.mpmsg = &mpm;
+
+ aim_send_im_ext(sess, conn, &args);
+
+ aim_mpmsg_free(sess, &mpm);
+
} else if (strstr(tmpstr, "havefeat")) {
struct aim_sendimext_args args;
static const char featmsg[] = {"I have nifty features."};
dinlineprintf("hasicon ");
dinlineprintf("\n");
- dvprintf("faimtest: icbm: encoding flags = {%04x, %04x}\n", args->flag1, args->flag2);
+ if (args->icbmflags & AIM_IMFLAGS_CUSTOMCHARSET)
+ dvprintf("faimtest: icbm: encoding flags = {%04x, %04x}\n", args->charset, args->charsubset);
/*
* Quickly convert it to eight bit format, replacing non-ASCII UNICODE
dvprintf("faimtest: icbm: message: %s\n", realmsg);
+ if (args->icbmflags & AIM_IMFLAGS_MULTIPART) {
+ aim_mpmsg_section_t *sec;
+ int z;
+
+ dvprintf("faimtest: icbm: multipart: this message has %d parts\n", args->mpmsg.numparts);
+
+ for (sec = args->mpmsg.parts, z = 0; sec; sec = sec->next, z++) {
+ if ((sec->charset == 0x0000) || (sec->charset == 0x0003) || (sec->charset == 0xffff)) {
+ dvprintf("faimtest: icbm: multipart: part %d: charset 0x%04x, subset 0x%04x, msg = %s\n", z, sec->charset, sec->charsubset, sec->data);
+ } else {
+ dvprintf("faimtest: icbm: multipart: part %d: charset 0x%04x, subset 0x%04x, binary or UNICODE data\n", z, sec->charset, sec->charsubset);
+ }
+ }
+ }
+
if (args->icbmflags & AIM_IMFLAGS_HASICON)
aim_send_im(sess, conn, userinfo->sn, AIM_IMFLAGS_BUDDYREQ, "You have an icon");
andersk / libfaim.git / commitdiff
