/* * aim_im.c * * The routines for sending/receiving Instant Messages. * * Note the term ICBM (Inter-Client Basic Message) which blankets * all types of genericly routed through-server messages. Within * the ICBM types (family 4), a channel is defined. Each channel * represents a different type of message. Channel 1 is used for * what would commonly be called an "instant message". Channel 2 * is used for negotiating "rendezvous". These transactions end in * something more complex happening, such as a chat invitation, or * a file transfer. * * In addition to the channel, every ICBM contains a cookie. For * standard IMs, these are only used for error messages. However, * the more complex rendezvous messages make suitably more complex * use of this field. * */ #include #include "im.h" #include "info.h" /* * Send an ICBM (instant message). * * * Possible flags: * AIM_IMFLAGS_AWAY -- Marks the message as an autoresponse * AIM_IMFLAGS_ACK -- Requests that the server send an ack * when the message is received (of type 0x0004/0x000c) * AIM_IMFLAGS_OFFLINE--If destination is offline, store it until they are * online (probably ICQ only). * AIM_IMFLAGS_UNICODE--Instead of ASCII7, the passed message is * made up of UNICODE duples. If you set * this, you'd better be damn sure you know * what you're doing. * AIM_IMFLAGS_ISO_8859_1 -- The message contains the ASCII8 subset * known as ISO-8859-1. * * Generally, you should use the lowest encoding possible to send * your message. If you only use basic punctuation and the generic * Latin alphabet, use ASCII7 (no flags). If you happen to use non-ASCII7 * characters, but they are all clearly defined in ISO-8859-1, then * use that. Keep in mind that not all characters in the PC ASCII8 * character set are defined in the ISO standard. For those cases (most * notably when the (r) symbol is used), you must use the full UNICODE * encoding for your message. In UNICODE mode, _all_ characters must * occupy 16bits, including ones that are not special. (Remember that * the first 128 UNICODE symbols are equivalent to ASCII7, however they * must be prefixed with a zero high order byte.) * * I strongly discourage the use of UNICODE mode, mainly because none * of the clients I use can parse those messages (and besides that, * wchars are difficult and non-portable to handle in most UNIX environments). * If you really need to include special characters, use the HTML UNICODE * entities. These are of the form ߪ where 2026 is the hex * representation of the UNICODE index (in this case, UNICODE * "Horizontal Ellipsis", or 133 in in ASCII8). * * Implementation note: Since this is one of the most-used functions * in all of libfaim, it is written with performance in mind. As such, * it is not as clear as it could be in respect to how this message is * supposed to be laid out. Most obviously, tlvlists should be used * instead of writing out the bytes manually. * * XXX more precise verification that we never send SNACs larger than 8192 * XXX check SNAC size for multipart * */ int aim_send_im_ext(aim_session_t *sess, struct aim_sendimext_args *args) { static const guint8 deffeatures[] = { 0x01, 0x01, 0x01, 0x02 }; aim_conn_t *conn; int i, msgtlvlen; aim_frame_t *fr; aim_snacid_t snacid; if (!sess || !(conn = aim_conn_findbygroup(sess, 0x0004))) { return -EINVAL; } if (!args) { 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; } } /* Painfully calculate the size of the message TLV */ msgtlvlen = 1 + 1; /* 0501 */ if (args->flags & AIM_IMFLAGS_CUSTOMFEATURES) { msgtlvlen += 2 + args->featureslen; } else { 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 */ snacid = aim_cachesnac(sess, 0x0004, 0x0006, 0x0000, args->destsn, strlen(args->destsn) + 1); aim_putsnac(&fr->data, 0x0004, 0x0006, 0x0000, snacid); /* * Generate a random message cookie * * We could cache these like we do SNAC IDs. (In fact, it * might be a good idea.) In the message error functions, * the 8byte message cookie is returned as well as the * SNAC ID. * */ for (i = 0; i < 8; i++) { aimbs_put8(&fr->data, (guint8) rand()); } /* * Channel ID */ aimbs_put16(&fr->data, 0x0001); /* * Destination SN (prepended with byte length) */ aimbs_put8(&fr->data, strlen(args->destsn)); aimbs_putraw(&fr->data, (guint8 *) args->destsn, strlen(args->destsn)); /* * Message TLV (type 2). */ aimbs_put16(&fr->data, 0x0002); aimbs_put16(&fr->data, msgtlvlen); /* * Features * */ aimbs_put8(&fr->data, 0x05); aimbs_put8(&fr->data, 0x01); if (args->flags & AIM_IMFLAGS_CUSTOMFEATURES) { aimbs_put16(&fr->data, args->featureslen); aimbs_putraw(&fr->data, args->features, args->featureslen); } else { aimbs_put16(&fr->data, sizeof(deffeatures)); aimbs_putraw(&fr->data, deffeatures, sizeof(deffeatures)); } if (args->flags & AIM_IMFLAGS_MULTIPART) { aim_mpmsg_section_t *sec; 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); } } else { aimbs_put16(&fr->data, 0x0101); /* * 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, (guint8 *) args->msg, args->msglen); } /* * Set the Request Acknowledge flag. */ if (args->flags & AIM_IMFLAGS_ACK) { aimbs_put16(&fr->data, 0x0003); aimbs_put16(&fr->data, 0x0000); } /* * Set the Autoresponse flag. */ if (args->flags & AIM_IMFLAGS_AWAY) { aimbs_put16(&fr->data, 0x0004); aimbs_put16(&fr->data, 0x0000); } if (args->flags & AIM_IMFLAGS_OFFLINE) { aimbs_put16(&fr->data, 0x0006); aimbs_put16(&fr->data, 0x0000); } /* * Set the I HAVE A REALLY PURTY ICON flag. */ if (args->flags & AIM_IMFLAGS_HASICON) { aimbs_put16(&fr->data, 0x0008); aimbs_put16(&fr->data, 0x000c); aimbs_put32(&fr->data, args->iconlen); aimbs_put16(&fr->data, 0x0001); aimbs_put16(&fr->data, args->iconsum); aimbs_put32(&fr->data, args->iconstamp); } /* * Set the Buddy Icon Requested flag. */ if (args->flags & AIM_IMFLAGS_BUDDYREQ) { aimbs_put16(&fr->data, 0x0009); aimbs_put16(&fr->data, 0x0000); } aim_tx_enqueue(sess, fr); if (!(sess->flags & AIM_SESS_FLAGS_DONTTIMEOUTONICBM)) { aim_cleansnacs(sess, 60); /* clean out SNACs over 60sec old */ } return 0; } /* * Simple wrapper for aim_send_im_ext() * * You cannot use aim_send_im if you need the HASICON flag. You must * use aim_send_im_ext directly for that. * * aim_send_im also cannot be used if you require UNICODE messages, because * that requires an explicit message length. Use aim_send_im_ext(). * */ int aim_send_im(aim_session_t *sess, const char *destsn, guint16 flags, const char *msg) { struct aim_sendimext_args args; args.destsn = destsn; args.flags = flags; args.msg = msg; 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 | AIM_IMFLAGS_MULTIPART); return aim_send_im_ext(sess, &args); } /** * answers status message requests * @param sess the oscar session * @param sender the guy whos asking * @param cookie message id which we are answering for * @param message away message * @param state our current away state the way icq requests it (0xE8 for away, 0xE9 occupied, ...) * @return 0 if no error */ int aim_send_im_ch2_statusmessage(aim_session_t *sess, const char *sender, const guint8 *cookie, const char *message, const guint8 state, const guint16 dc) { aim_conn_t *conn; aim_frame_t *fr; aim_snacid_t snacid; if (!sess || !(conn = aim_conn_findbygroup(sess, 0x0004))) { return -EINVAL; } if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 10 + 8 + 2 + 1 + strlen(sender) + 2 + 0x1d + 0x10 + 9 + strlen(message) + 1))) { return -ENOMEM; } snacid = aim_cachesnac(sess, 0x0004, 0x000b, 0x0000, NULL, 0); aim_putsnac(&fr->data, 0x0004, 0x000b, 0x0000, snacid); aimbs_putraw(&fr->data, cookie, 8); aimbs_put16(&fr->data, 0x0002); /* channel */ aimbs_put8(&fr->data, strlen(sender)); aimbs_putraw(&fr->data, (guint8 *) sender, strlen(sender)); aimbs_put16(&fr->data, 0x0003); /* reason: channel specific */ aimbs_putle16(&fr->data, 0x001b); /* length of data SEQ1 */ aimbs_putle16(&fr->data, 0x0008); /* protocol version */ aimbs_putle32(&fr->data, 0x0000); /* no plugin -> 16 times 0x00 */ aimbs_putle32(&fr->data, 0x0000); aimbs_putle32(&fr->data, 0x0000); aimbs_putle32(&fr->data, 0x0000); aimbs_putle16(&fr->data, 0x0000); /* unknown */ aimbs_putle32(&fr->data, 0x0003); /* client features */ aimbs_putle8(&fr->data, 0x00); /* unknown */ aimbs_putle16(&fr->data, dc); /* Sequence number? XXX - This should decrement by 1 with each request */ /* end of SEQ1 */ aimbs_putle16(&fr->data, 0x000e); /* Length of SEQ2 */ aimbs_putle16(&fr->data, dc); /* Sequence number? same as above * XXX - This should decrement by 1 with each request */ aimbs_putle32(&fr->data, 0x00000000); /* Unknown */ aimbs_putle32(&fr->data, 0x00000000); /* Unknown */ aimbs_putle32(&fr->data, 0x00000000); /* Unknown */ /* end of SEQ2 */ /* now for the real fun */ aimbs_putle8(&fr->data, state); /* away state */ aimbs_putle8(&fr->data, 0x03); /* msg-flag: 03 for states */ aimbs_putle16(&fr->data, 0x0000); /* status code ? */ aimbs_putle16(&fr->data, 0x0000); /* priority code */ aimbs_putle16(&fr->data, strlen(message) + 1); /* message length + termination */ aimbs_putraw(&fr->data, (guint8 *) message, strlen(message) + 1); /* null terminated string */ aim_tx_enqueue(sess, fr); return 0; } static int outgoingim(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs) { int i, ret = 0; aim_rxcallback_t userfunc; guint16 channel; aim_tlvlist_t *tlvlist; char *sn; int snlen; guint16 icbmflags = 0; guint8 flag1 = 0, flag2 = 0; char *msg = NULL; aim_tlv_t *msgblock; /* ICBM Cookie. */ for (i = 0; i < 8; i++) { aimbs_get8(bs); } /* Channel ID */ channel = aimbs_get16(bs); if (channel != 0x01) { imcb_error(sess->aux_data, "icbm: ICBM received on unsupported channel. Ignoring."); return 0; } snlen = aimbs_get8(bs); sn = aimbs_getstr(bs, snlen); tlvlist = aim_readtlvchain(bs); if (aim_gettlv(tlvlist, 0x0003, 1)) { icbmflags |= AIM_IMFLAGS_ACK; } if (aim_gettlv(tlvlist, 0x0004, 1)) { icbmflags |= AIM_IMFLAGS_AWAY; } if ((msgblock = aim_gettlv(tlvlist, 0x0002, 1))) { aim_bstream_t mbs; int featurelen, msglen; aim_bstream_init(&mbs, msgblock->value, msgblock->length); aimbs_get8(&mbs); aimbs_get8(&mbs); for (featurelen = aimbs_get16(&mbs); featurelen; featurelen--) { aimbs_get8(&mbs); } aimbs_get8(&mbs); aimbs_get8(&mbs); msglen = aimbs_get16(&mbs) - 4; /* final block length */ flag1 = aimbs_get16(&mbs); flag2 = aimbs_get16(&mbs); msg = aimbs_getstr(&mbs, msglen); } if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) { ret = userfunc(sess, rx, channel, sn, msg, icbmflags, flag1, flag2); } g_free(sn); aim_freetlvchain(&tlvlist); 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 definitely recommend avoiding this feature unless you really * know what you are doing, and/or you have something neat to do with it. * */ 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, guint16 charset, guint16 charsubset, guint8 *data, guint16 datalen) { aim_mpmsg_section_t *sec; if (!(sec = g_new0(aim_mpmsg_section_t, 1))) { 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; } 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; g_free(cur->data); g_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, guint8 *data, int len, struct aim_incomingim_ch1_args *args) { static const guint16 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)) { guint16 msglen, flag1, flag2; char *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, (guint8 *) msgbuf, (guint16) 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. */ 
/*
 * libyahoo2: yahoo_httplib.c
 *
 * Copyright (C) 2002-2004, Philip S Tellis <philip.tellis AT gmx.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <stdio.h>
#include <stdlib.h>

#if STDC_HEADERS
# include <string.h>
#else
# if !HAVE_STRCHR
#  define strchr index
#  define strrchr rindex
# endif
char *strchr (), *strrchr ();
# if !HAVE_MEMCPY
#  define memcpy(d, s, n) bcopy ((s), (d), (n))
#  define memmove(d, s, n) bcopy ((s), (d), (n))
# endif
#endif


#include <errno.h>
#ifndef _WIN32
#include <unistd.h>
#endif
#include <ctype.h>
#include "yahoo2.h"
#include "yahoo2_callbacks.h"
#include "yahoo_httplib.h"
#include "yahoo_util.h"

#include "yahoo_debug.h"
#ifdef __MINGW32__
# include <winsock2.h>
# define write(a,b,c) send(a,b,c,0)
# define read(a,b,c)  recv(a,b,c,0)
# define snprintf _snprintf
#endif

#ifdef USE_STRUCT_CALLBACKS
extern struct yahoo_callbacks *yc;
#define YAHOO_CALLBACK(x)	yc->x
#else
#define YAHOO_CALLBACK(x)	x
#endif

extern enum yahoo_log_level log_level;

int yahoo_tcp_readline(char *ptr, int maxlen, int fd)
{
	int n, rc;
	char c;

	for (n = 1; n < maxlen; n++) {

		do {
			rc = read(fd, &c, 1);
		} while(rc == -1 && (errno == EINTR || errno == EAGAIN)); /* this is bad - it should be done asynchronously */

		if (rc == 1) {
			if(c == '\r')			/* get rid of \r */
				continue;
			*ptr = c;
			if (c == '\n')
				break;
			ptr++;
		} else if (rc == 0) {
			if (n == 1)
				return (0);		/* EOF, no data */
			else
				break;			/* EOF, w/ data */
		} else {
			return -1;
		}
	}

	*ptr = 0;
	return (n);
}

static int url_to_host_port_path(const char *url,
		char *host, int *port, char *path)
{
	char *urlcopy=NULL;
	char *slash=NULL;
	char *colon=NULL;
	
	/*
	 * http://hostname
	 * http://hostname/
	 * http://hostname/path
	 * http://hostname/path:foo
	 * http://hostname:port
	 * http://hostname:port/
	 * http://hostname:port/path
	 * http://hostname:port/path:foo
	 */

	if(strstr(url, "http://") == url) {
		urlcopy = strdup(url+7);
	} else {
		WARNING(("Weird url - unknown protocol: %s", url));
		return 0;
	}

	slash = strchr(urlcopy, '/');
	colon = strchr(urlcopy, ':');

	if(!colon || (slash && slash < colon)) {
		*port = 80;
	} else {
		*colon = 0;
		*port = atoi(colon+1);
	}

	if(!slash) {
		strcpy(path, "/");
	} else {
		strcpy(path, slash);
		*slash = 0;
	}

	strcpy(host, urlcopy);
	
	FREE(urlcopy);

	return 1;
}

static int isurlchar(unsigned char c)
{
	return (isalnum(c) || '-' == c || '_' == c);
}

char *yahoo_urlencode(const char *instr)
{
	int ipos=0, bpos=0;
	char *str = NULL;