Esempio n. 1
0
/**
 * \internal Obsługuje pakiet przerwania żądania połączenia bezpośredniego.
 *
 * \param sess Struktura sesji
 * \param e Struktura zdarzenia
 * \param payload Treść pakietu
 * \param len Długość pakietu
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
int gg_dcc7_handle_abort(struct gg_session *sess, struct gg_event *e, void *payload, int len)
{
	struct gg_dcc7_aborted *p = payload;
	struct gg_dcc7 *dcc;

	gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_abort(%p, %p, %p, %d)\n", sess, e, payload, len);

	if (!(dcc = gg_dcc7_session_find(sess, p->id, gg_fix32(0)))) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_abort() unknown dcc session\n");
		return 0;
	}

	gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_abort() state %d\n", dcc->state);

	if (dcc->state != GG_STATE_IDLE) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_abort() invalid state\n");
		e->type = GG_EVENT_DCC7_ERROR;
		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
		e->event.dcc7_error_ex.dcc7 = dcc;
		return 0;
	}

	e->type = GG_EVENT_DCC7_REJECT;
	e->event.dcc7_reject.dcc7 = dcc;
	e->event.dcc7_reject.reason = gg_fix32(GG_DCC7_REJECT_USER);

	// XXX ustawić state na rejected?

	return 0;
}
Esempio n. 2
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/**
 * \internal Obsługuje pakiet odrzucenia połączenia bezpośredniego.
 *
 * \param sess Struktura sesji
 * \param e Struktura zdarzenia
 * \param payload Treść pakietu
 * \param len Długość pakietu
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
int gg_dcc7_handle_reject(struct gg_session *sess, struct gg_event *e, const void *payload, int len)
{
	const struct gg_dcc7_reject *p = payload;
	struct gg_dcc7 *dcc;

	gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_reject(%p, %p, %p, %d)\n", sess, e, payload, len);

	if (!(dcc = gg_dcc7_session_find(sess, p->id, gg_fix32(p->uin)))) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_reject() unknown dcc session\n");
		return 0;
	}
	
	if (dcc->state != GG_STATE_WAITING_FOR_ACCEPT) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_reject() invalid state\n");
		e->type = GG_EVENT_DCC7_ERROR;
		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
		return 0;
	}

	e->type = GG_EVENT_DCC7_REJECT;
	e->event.dcc7_reject.dcc7 = dcc;
	e->event.dcc7_reject.reason = gg_fix32(p->reason);

	// XXX ustawić state na rejected?

	return 0;
}
Esempio n. 3
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/**
 * \internal Obsługuje pakiet akceptacji połączenia bezpośredniego.
 *
 * \param sess Struktura sesji
 * \param e Struktura zdarzenia
 * \param payload Treść pakietu
 * \param len Długość pakietu
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
int gg_dcc7_handle_accept(struct gg_session *sess, struct gg_event *e, void *payload, int len)
{
	struct gg_dcc7_accept *p = payload;
	struct gg_dcc7 *dcc;

	gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_accept(%p, %p, %p, %d)\n", sess, e, payload, len);

	if (!(dcc = gg_dcc7_session_find(sess, p->id, gg_fix32(p->uin)))) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_accept() unknown dcc session\n");
		// XXX wysłać reject?
		e->type = GG_EVENT_DCC7_ERROR;
		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
		e->event.dcc7_error_ex.dcc7 = dcc;
		return 0;
	}

	if (dcc->state != GG_STATE_WAITING_FOR_ACCEPT) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_accept() invalid state\n");
		e->type = GG_EVENT_DCC7_ERROR;
		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
		e->event.dcc7_error_ex.dcc7 = dcc;
		return 0;
	}
	
	// XXX czy dla odwrotnego połączenia powinniśmy wywołać już zdarzenie GG_DCC7_ACCEPT?
	
	dcc->offset = gg_fix32(p->offset);
	dcc->state = GG_STATE_WAITING_FOR_INFO;

	return 0;
}
Esempio n. 4
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/*
 * gg_pubdir50()
 *
 * wysy³a zapytanie katalogu publicznego do serwera.
 *
 *  - sess - sesja,
 *  - req - zapytanie.
 *
 * numer sekwencyjny wyszukiwania lub 0 w przypadku b³êdu.
 */
uint32_t gg_pubdir50(struct gg_session *sess, gg_pubdir50_t req)
{
	int i, size = 5;
	uint32_t res;
	char *buf, *p;
	struct gg_pubdir50_request *r;

	gg_debug(GG_DEBUG_FUNCTION, "** gg_pubdir50(%p, %p);\n", sess, req);
	
	if (!sess || !req) {
		gg_debug(GG_DEBUG_MISC, "// gg_pubdir50() invalid arguments\n");
		errno = EFAULT;
		return 0;
	}

	if (sess->state != GG_STATE_CONNECTED) {
		gg_debug(GG_DEBUG_MISC, "// gg_pubdir50() not connected\n");
		errno = ENOTCONN;
		return 0;
	}

	for (i = 0; i < req->entries_count; i++) {
		/* wyszukiwanie bierze tylko pierwszy wpis */
		if (req->entries[i].num)
			continue;
		
		size += strlen(req->entries[i].field) + 1;
		size += strlen(req->entries[i].value) + 1;
	}

	if (!(buf = malloc(size))) {
		gg_debug(GG_DEBUG_MISC, "// gg_pubdir50() out of memory (%d bytes)\n", size);
		return 0;
	}

	r = (struct gg_pubdir50_request*) buf;
	res = time(NULL);
	r->type = req->type;
	r->seq = (req->seq) ? gg_fix32(req->seq) : gg_fix32(time(NULL));
	req->seq = gg_fix32(r->seq);

	for (i = 0, p = buf + 5; i < req->entries_count; i++) {
		if (req->entries[i].num)
			continue;

		strcpy(p, req->entries[i].field);
		p += strlen(p) + 1;

		strcpy(p, req->entries[i].value);
		p += strlen(p) + 1;
	}

	if (gg_send_packet(sess, GG_PUBDIR50_REQUEST, buf, size, NULL, 0) == -1)
		res = 0;

	free(buf);

	return res;
}
Esempio n. 5
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/**
 * \internal Tworzy gniazdo nasłuchujące i wysyła jego parametry
 *
 * \param dcc Struktura połączenia
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
static int gg_dcc7_listen_and_send_info(struct gg_dcc7 *dcc)
{
	struct gg_dcc7_info pkt;
	uint16_t external_port;
	uint32_t external_addr;
	struct in_addr addr;

	gg_debug_dcc(dcc, GG_DEBUG_FUNCTION, "** gg_dcc7_listen_and_send_info(%p)\n", dcc);

	if (gg_dcc7_listen(dcc, dcc->sess->client_addr, dcc->sess->client_port) == -1)
		return -1;
	
	if (dcc->sess->external_port != 0)
		external_port = dcc->sess->external_port;
	else
		external_port = dcc->local_port;

	if (dcc->sess->external_addr != 0)
		external_addr = dcc->sess->external_addr;
	else 
		external_addr = dcc->local_addr;

	addr.s_addr = external_addr;

	gg_debug_dcc(dcc, GG_DEBUG_MISC, "// dcc7_listen_and_send_info() sending IP address %s and port %d\n", inet_ntoa(addr), external_port);

	memset(&pkt, 0, sizeof(pkt));
	pkt.uin = gg_fix32(dcc->peer_uin);
	pkt.type = GG_DCC7_TYPE_P2P;
	pkt.id = dcc->cid;
	snprintf((char*) pkt.info, sizeof(pkt.info), "%s %d", inet_ntoa(addr), external_port);
	snprintf((char*) pkt.hash, sizeof(pkt.hash), "%u", external_addr + external_port * rand());

	return gg_send_packet(dcc->sess, GG_DCC7_INFO, &pkt, sizeof(pkt), NULL);
}
Esempio n. 6
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/**
 * \internal Wysyła do serwera żądanie nadania identyfikatora sesji
 *
 * \param sess Struktura sesji
 * \param type Rodzaj połączenia (\c GG_DCC7_TYPE_FILE lub \c GG_DCC7_TYPE_VOICE)
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
static int gg_dcc7_request_id(struct gg_session *sess, uint32_t type)
{
	struct gg_dcc7_id_request pkt;

	gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_request_id(%p, %d)\n", sess, type);

	if (!sess) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_request_id() invalid parameters\n");
		errno = EFAULT;
		return -1;
	}

	if (sess->state != GG_STATE_CONNECTED) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_request_id() not connected\n");
		errno = ENOTCONN;
		return -1;
	}

	if (type != GG_DCC7_TYPE_VOICE && type != GG_DCC7_TYPE_FILE) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_request_id() invalid transfer type (%d)\n", type);
		errno = EINVAL;
		return -1;
	}
	
	memset(&pkt, 0, sizeof(pkt));
	pkt.type = gg_fix32(type);

	return gg_send_packet(sess, GG_DCC7_ID_REQUEST, &pkt, sizeof(pkt), NULL);
}
Esempio n. 7
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/**
 * Wysyła ramkę danych połączenia głosowego.
 *
 * \param d Struktura połączenia
 * \param buf Bufor z danymi
 * \param length Długość bufora z danymi
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 *
 * \ingroup dcc6
 */
int gg_dcc_voice_send(struct gg_dcc *d, char *buf, int length)
{
	struct packet_s {
		uint8_t type;
		uint32_t length;
	} GG_PACKED;
	struct packet_s packet;

	gg_debug(GG_DEBUG_FUNCTION, "++ gg_dcc_voice_send(%p, %p, %d);\n", d, buf, length);
	if (!d || !buf || length < 0 || d->type != GG_SESSION_DCC_VOICE) {
		gg_debug(GG_DEBUG_MISC, "// gg_dcc_voice_send() invalid argument\n");
		errno = EINVAL;
		return -1;
	}

	packet.type = 0x03; /* XXX */
	packet.length = gg_fix32(length);

	if (send(d->fd, &packet, sizeof(packet), 0) < (signed)sizeof(packet)) {
		gg_debug(GG_DEBUG_MISC, "// gg_dcc_voice_send() send() failed\n");
		return -1;
	}
	gg_dcc_debug_data("write", d->fd, &packet, sizeof(packet));

	if (send(d->fd, buf, length, 0) < length) {
		gg_debug(GG_DEBUG_MISC, "// gg_dcc_voice_send() send() failed\n");
		return -1;
	}
	gg_dcc_debug_data("write", d->fd, buf, length);

	return 0;
}
Esempio n. 8
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/**
 * Przerwanie żądania przesłania pliku.
 *
 * \param dcc Struktura połączenia
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 *
 * \ingroup dcc7
 */
int gg_dcc7_abort(struct gg_dcc7 *dcc)
{
	struct gg_dcc7_abort pkt;

	gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_abort(%p)\n", dcc);

	if (!dcc || !dcc->sess) {
		gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_abort() invalid parameters\n");
		errno = EFAULT;
		return -1;
	}

	memset(&pkt, 0, sizeof(pkt));
	pkt.id = dcc->cid;
	pkt.uin_from = gg_fix32(dcc->uin);
	pkt.uin_to = gg_fix32(dcc->peer_uin);

	return gg_send_packet(dcc->sess, GG_DCC7_ABORT, &pkt, sizeof(pkt), NULL);
}
Esempio n. 9
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/**
 * Odrzuca próbę przesłania pliku.
 *
 * \param dcc Struktura połączenia
 * \param reason Powód odrzucenia
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 *
 * \ingroup dcc7
 */
int gg_dcc7_reject(struct gg_dcc7 *dcc, int reason)
{
	struct gg_dcc7_reject pkt;

	gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_reject(%p, %d)\n", dcc, reason);

	if (!dcc || !dcc->sess) {
		gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_reject() invalid parameters\n");
		errno = EFAULT;
		return -1;
	}

	memset(&pkt, 0, sizeof(pkt));
	pkt.uin = gg_fix32(dcc->peer_uin);
	pkt.id = dcc->cid;
	pkt.reason = gg_fix32(reason);

	return gg_send_packet(dcc->sess, GG_DCC7_REJECT, &pkt, sizeof(pkt), NULL);
}
Esempio n. 10
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static void test_gg_fix32(void)
{
	const char *source = "\xee\xdd\xcc\xbb";
	uint32_t value;

	memcpy(&value, source, sizeof(value));

	if (gg_fix32(value) != 0xbbccddee) {
		fprintf(stderr, "gg_fix32 failed\n");
		exit(1);
	}
}
Esempio n. 11
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/**
 * \internal Obsługuje pakiet identyfikatora połączenia bezpośredniego.
 *
 * \param sess Struktura sesji
 * \param e Struktura zdarzenia
 * \param payload Treść pakietu
 * \param len Długość pakietu
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
int gg_dcc7_handle_id(struct gg_session *sess, struct gg_event *e, void *payload, int len)
{
	struct gg_dcc7_id_reply *p = payload;
	struct gg_dcc7 *tmp;

	gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_id(%p, %p, %p, %d)\n", sess, e, payload, len);

	for (tmp = sess->dcc7_list; tmp; tmp = tmp->next) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// checking dcc %p, state %d, type %d\n", tmp, tmp->state, tmp->dcc_type);

		if (tmp->state != GG_STATE_REQUESTING_ID || tmp->dcc_type != (int)gg_fix32(p->type))
			continue;
		
		tmp->cid = p->id;

		switch (tmp->dcc_type) {
			case GG_DCC7_TYPE_FILE:
			{
				struct gg_dcc7_new s;

				memset(&s, 0, sizeof(s));
				s.id = tmp->cid;
				s.type = gg_fix32(GG_DCC7_TYPE_FILE);
				s.uin_from = gg_fix32(tmp->uin);
				s.uin_to = gg_fix32(tmp->peer_uin);
				s.size = gg_fix32(tmp->size);

				strncpy((char*) s.filename, (char*) tmp->filename, GG_DCC7_FILENAME_LEN);

				tmp->state = GG_STATE_WAITING_FOR_ACCEPT;
				tmp->timeout = GG_DCC7_TIMEOUT_FILE_ACK;

				return gg_send_packet(sess, GG_DCC7_NEW, &s, sizeof(s), NULL);
			}
		}
	}

	return 0;
}
Esempio n. 12
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/**
 * Potwierdza chęć odebrania pliku.
 *
 * \param dcc Struktura połączenia
 * \param offset Początkowy offset przy wznawianiu przesyłania pliku
 *
 * \note Biblioteka nie zmienia położenia w odbieranych plikach. Jeśli offset
 * początkowy jest różny od zera, należy ustawić go funkcją \c lseek() lub
 * podobną.
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 *
 * \ingroup dcc7
 */
int gg_dcc7_accept(struct gg_dcc7 *dcc, unsigned int offset)
{
	struct gg_dcc7_accept pkt;

	gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_accept(%p, %d)\n", dcc, offset);

	if (!dcc || !dcc->sess) {
		gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_accept() invalid parameters\n");
		errno = EFAULT;
		return -1;
	}

	memset(&pkt, 0, sizeof(pkt));
	pkt.uin = gg_fix32(dcc->peer_uin);
	pkt.id = dcc->cid;
	pkt.offset = gg_fix32(offset);

	if (gg_send_packet(dcc->sess, GG_DCC7_ACCEPT, &pkt, sizeof(pkt), NULL) == -1)
		return -1;

	dcc->offset = offset;

	return gg_dcc7_listen_and_send_info(dcc);
}
Esempio n. 13
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/**
 * \internal Tworzy gniazdo nasłuchujące i wysyła jego parametry
 *
 * \param dcc Struktura połączenia
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
static int gg_dcc7_listen_and_send_info(struct gg_dcc7 *dcc)
{
	struct gg_dcc7_info pkt;
	uint16_t external_port;
	uint16_t local_port;
	uint32_t count;

	gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_listen_and_send_info(%p)\n", dcc);

	if (!dcc->sess->client_port)
		local_port = dcc->sess->external_port;
	else
		local_port = dcc->sess->client_port;

	if (gg_dcc7_listen(dcc, local_port) == -1)
		return -1;
	
	if (!dcc->sess->external_port || dcc->local_port != local_port)
		external_port = dcc->local_port;
	else
		external_port = dcc->sess->external_port;

	if (!dcc->sess->external_addr || dcc->local_port != local_port)
		dcc->local_addr = dcc->sess->client_addr;
	else
		dcc->local_addr = dcc->sess->external_addr;

	gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// dcc7_listen_and_send_info() sending IP address %s and port %d\n", inet_ntoa(*((struct in_addr*) &dcc->local_addr)), external_port);

	memset(&pkt, 0, sizeof(pkt));
	pkt.uin = gg_fix32(dcc->peer_uin);
	pkt.type = GG_DCC7_TYPE_P2P;
	pkt.id = dcc->cid;
	snprintf((char*) pkt.info, sizeof(pkt.info), "%s %d", inet_ntoa(*((struct in_addr*) &dcc->local_addr)), external_port);
	// TODO: implement hash count
	// we MUST fill hash to recive from server request for server connection
	//snprintf((char*) pkt.hash, sizeof(pkt.hash), "0");
	count = dcc->local_addr + external_port * rand();
	mir_snprintf(pkt.hash, sizeof(pkt.hash), "%d", count);

	return gg_send_packet(dcc->sess, GG_DCC7_INFO, &pkt, sizeof(pkt), NULL);
}
Esempio n. 14
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/**
 * \internal Tworzy gniazdo nasłuchujące i wysyła jego parametry
 *
 * \param dcc Struktura połączenia
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
static int gg_dcc7_listen_and_send_info(struct gg_dcc7 *dcc)
{
	struct gg_dcc7_info pkt;

	gg_debug_dcc(dcc, GG_DEBUG_FUNCTION, "** gg_dcc7_listen_and_send_info(%p)\n", dcc);

	// XXX dać możliwość konfiguracji?
	
	dcc->local_addr = dcc->sess->client_addr;

	if (gg_dcc7_listen(dcc, 0) == -1)
		return -1;

	memset(&pkt, 0, sizeof(pkt));
	pkt.uin = gg_fix32(dcc->peer_uin);
	pkt.type = GG_DCC7_TYPE_P2P;
	pkt.id = dcc->cid;
	snprintf((char*) pkt.info, sizeof(pkt.info), "%s %d", inet_ntoa(*((struct in_addr*) &dcc->local_addr)), dcc->local_port);

	return gg_send_packet(dcc->sess, GG_DCC7_INFO, &pkt, sizeof(pkt), NULL);
}
Esempio n. 15
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/**
 * Wypełnia pola struktury \c gg_dcc niezbędne do wysłania pliku.
 *
 * \param d Struktura połączenia
 * \param filename Nazwa pliku zapisywana w strukturze
 * \param local_filename Nazwa pliku w lokalnym systemie plików
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 *
 * \ingroup dcc6
 */
int gg_dcc_fill_file_info2(struct gg_dcc *d, const char *filename, const char *local_filename)
{
	struct stat st;
	const char *name, *ext, *p;
	unsigned char *q;
	int i, j;

	gg_debug(GG_DEBUG_FUNCTION, "** gg_dcc_fill_file_info2(%p, \"%s\", \"%s\");\n", d, filename, local_filename);

	if (!d || d->type != GG_SESSION_DCC_SEND) {
		gg_debug(GG_DEBUG_MISC, "// gg_dcc_fill_file_info2() invalid arguments\n");
		errno = EINVAL;
		return -1;
	}

	if (stat(local_filename, &st) == -1) {
		gg_debug(GG_DEBUG_MISC, "// gg_dcc_fill_file_info2() stat() failed (%s)\n", strerror(errno));
		return -1;
	}

	if ((st.st_mode & S_IFDIR)) {
		gg_debug(GG_DEBUG_MISC, "// gg_dcc_fill_file_info2() that's a directory\n");
		errno = EINVAL;
		return -1;
	}

	if ((d->file_fd = open(local_filename, O_RDONLY)) == -1) {
		gg_debug(GG_DEBUG_MISC, "// gg_dcc_fill_file_info2() open() failed (%s)\n", strerror(errno));
		return -1;
	}

	memset(&d->file_info, 0, sizeof(d->file_info));

	if (!(st.st_mode & S_IWUSR))
		d->file_info.mode |= gg_fix32(GG_DCC_FILEATTR_READONLY);

	gg_dcc_fill_filetime(st.st_atime, d->file_info.atime);
	gg_dcc_fill_filetime(st.st_mtime, d->file_info.mtime);
	gg_dcc_fill_filetime(st.st_ctime, d->file_info.ctime);

	d->file_info.size = gg_fix32(st.st_size);
	d->file_info.mode = gg_fix32(0x20);	/* FILE_ATTRIBUTE_ARCHIVE */

	if (!(name = strrchr(filename, '/')))
		name = filename;
	else
		name++;

	if (!(ext = strrchr(name, '.')))
		ext = name + strlen(name);

	for (i = 0, p = name; i < 8 && p < ext; i++, p++)
		d->file_info.short_filename[i] = toupper(name[i]);

	if (i == 8 && p < ext) {
		d->file_info.short_filename[6] = '~';
		d->file_info.short_filename[7] = '1';
	}

	if (strlen(ext) > 0) {
		for (j = 0; *ext && j < 4; j++, p++)
			d->file_info.short_filename[i + j] = toupper(ext[j]);
	}

	for (q = d->file_info.short_filename; *q; q++) {
		if (*q == 185) {
			*q = 165;
		} else if (*q == 230) {
			*q = 198;
		} else if (*q == 234) {
			*q = 202;
		} else if (*q == 179) {
			*q = 163;
		} else if (*q == 241) {
			*q = 209;
		} else if (*q == 243) {
			*q = 211;
		} else if (*q == 156) {
			*q = 140;
		} else if (*q == 159) {
			*q = 143;
		} else if (*q == 191) {
			*q = 175;
		}
	}

	gg_debug(GG_DEBUG_MISC, "// gg_dcc_fill_file_info2() short name \"%s\", dos name \"%s\"\n", name, d->file_info.short_filename);
	strncpy((char*) d->file_info.filename, name, sizeof(d->file_info.filename) - 1);

	return 0;
}
Esempio n. 16
0
/*
 * gg_watch_fd()
 *
 * funkcja, któr± nale¿y wywo³aæ, gdy co¶ siê stanie z obserwowanym
 * deskryptorem. zwraca klientowi informacjê o tym, co siê dzieje.
 *
 *  - sess - opis sesji
 *
 * wska¼nik do struktury gg_event, któr± trzeba zwolniæ pó¼niej
 * za pomoc± gg_event_free(). jesli rodzaj zdarzenia jest równy
 * GG_EVENT_NONE, nale¿y je zignorowaæ. je¶li zwróci³o NULL,
 * sta³o siê co¶ niedobrego -- albo zabrak³o pamiêci albo zerwa³o
 * po³±czenie.
 */
struct gg_event *gg_watch_fd(struct gg_session *sess)
{
	struct gg_event *e;
	int res = 0;
	int port = 0;
	int errno2 = 0;

	gg_debug(GG_DEBUG_FUNCTION, "** gg_watch_fd(%p);\n", sess);
	
	if (!sess) {
		errno = EFAULT;
		return NULL;
	}

	if (!(e = (void*) calloc(1, sizeof(*e)))) {
		gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() not enough memory for event data\n");
		return NULL;
	}

	e->type = GG_EVENT_NONE;

	switch (sess->state) {
		case GG_STATE_RESOLVING:
		{
			struct in_addr addr;
			int failed = 0;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_RESOLVING\n");

			if (read(sess->fd, &addr, sizeof(addr)) < (signed)sizeof(addr) || addr.s_addr == INADDR_NONE) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() resolving failed\n");
				failed = 1;
				errno2 = errno;
			}
			
			close(sess->fd);
			sess->fd = -1;

#ifndef __GG_LIBGADU_HAVE_PTHREAD
			waitpid(sess->pid, NULL, 0);
			sess->pid = -1;
#else
			if (sess->resolver) {
				gg_resolve_pthread_cleanup(sess->resolver, 0);
				sess->resolver = NULL;
			}
#endif

			if (failed) {
				errno = errno2;
				goto fail_resolving;
			}

			/* je¶li jeste¶my w resolverze i mamy ustawiony port
			 * proxy, znaczy, ¿e resolvowali¶my proxy. zatem
			 * wpiszmy jego adres. */
			if (sess->proxy_port)
				sess->proxy_addr = addr.s_addr;

			/* zapiszmy sobie adres huba i adres serwera (do
			 * bezpo¶redniego po³±czenia, je¶li hub le¿y)
			 * z resolvera. */
			if (sess->proxy_addr && sess->proxy_port)
				port = sess->proxy_port;
			else {
				sess->server_addr = sess->hub_addr = addr.s_addr;
				port = GG_APPMSG_PORT;
			}

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() resolved, connecting to %s:%d\n", inet_ntoa(addr), port);
			
			/* ³±czymy siê albo z hubem, albo z proxy, zale¿nie
			 * od tego, co resolvowali¶my. */
			if ((sess->fd = gg_connect(&addr, port, sess->async)) == -1) {
				/* je¶li w trybie asynchronicznym gg_connect()
				 * zwróci b³±d, nie ma sensu próbowaæ dalej. */
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s), critical\n", errno, strerror(errno));
				goto fail_connecting;
			}

			/* je¶li podano serwer i ³±czmy siê przez proxy,
			 * jest to bezpo¶rednie po³±czenie, inaczej jest
			 * do huba. */
			sess->state = (sess->proxy_addr && sess->proxy_port && sess->server_addr) ? GG_STATE_CONNECTING_GG : GG_STATE_CONNECTING_HUB;
			sess->check = GG_CHECK_WRITE;
			sess->timeout = GG_DEFAULT_TIMEOUT;

			break;
		}

		case GG_STATE_CONNECTING_HUB:
		{
			char buf[1024], *client, *auth;
			int res = 0, res_size = sizeof(res);
			const char *host, *appmsg;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_CONNECTING_HUB\n");

			/* je¶li asynchroniczne, sprawdzamy, czy nie wyst±pi³
			 * przypadkiem jaki¶ b³±d. */
			if (sess->async && (getsockopt(sess->fd, SOL_SOCKET, SO_ERROR, &res, &res_size) || res)) {
				/* no tak, nie uda³o siê po³±czyæ z proxy. nawet
				 * nie próbujemy dalej. */
				if (sess->proxy_addr && sess->proxy_port) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to proxy failed (errno=%d, %s)\n", res, strerror(res));
					goto fail_connecting;
				}
					
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to hub failed (errno=%d, %s), trying direct connection\n", res, strerror(res));
				close(sess->fd);

				if ((sess->fd = gg_connect(&sess->hub_addr, GG_DEFAULT_PORT, sess->async)) == -1) {
					/* przy asynchronicznych, gg_connect()
					 * zwraca -1 przy b³êdach socket(),
					 * ioctl(), braku routingu itd. dlatego
					 * nawet nie próbujemy dalej. */
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() direct connection failed (errno=%d, %s), critical\n", errno, strerror(errno));
					goto fail_connecting;
				}

				sess->state = GG_STATE_CONNECTING_GG;
				sess->check = GG_CHECK_WRITE;
				sess->timeout = GG_DEFAULT_TIMEOUT;
				break;
			}
			
			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connected to hub, sending query\n");

			if (!(client = gg_urlencode((sess->client_version) ? sess->client_version : GG_DEFAULT_CLIENT_VERSION))) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() out of memory for client version\n");
				goto fail_connecting;
			}

			if (!gg_proxy_http_only && sess->proxy_addr && sess->proxy_port)
				host = "http://" GG_APPMSG_HOST;
			else
				host = "";

#ifdef __GG_LIBGADU_HAVE_OPENSSL
			if (sess->ssl)
				appmsg = "appmsg3.asp";
			else
#endif
				appmsg = "appmsg2.asp";

			auth = gg_proxy_auth();

			snprintf(buf, sizeof(buf) - 1,
				"GET %s/appsvc/%s?fmnumber=%u&version=%s&lastmsg=%d HTTP/1.0\r\n"
				"Host: " GG_APPMSG_HOST "\r\n"
				"User-Agent: " GG_HTTP_USERAGENT "\r\n"
				"Pragma: no-cache\r\n"
				"%s" 
				"\r\n", host, appmsg, sess->uin, client, sess->last_sysmsg, (auth) ? auth : "");

			if (auth)
				free(auth);
			
			free(client);

			/* zwolnij pamiêæ po wersji klienta. */
			if (sess->client_version) {
				free(sess->client_version);
				sess->client_version = NULL;
			}

			gg_debug(GG_DEBUG_MISC, "=> -----BEGIN-HTTP-QUERY-----\n%s\n=> -----END-HTTP-QUERY-----\n", buf);
	 
			/* zapytanie jest krótkie, wiêc zawsze zmie¶ci siê
			 * do bufora gniazda. je¶li write() zwróci mniej,
			 * sta³o siê co¶ z³ego. */
			if (write(sess->fd, buf, strlen(buf)) < (signed)strlen(buf)) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() sending query failed\n");

				e->type = GG_EVENT_CONN_FAILED;
				e->event.failure = GG_FAILURE_WRITING;
				sess->state = GG_STATE_IDLE;
				close(sess->fd);
				sess->fd = -1;
				break;
			}

			sess->state = GG_STATE_READING_DATA;
			sess->check = GG_CHECK_READ;
			sess->timeout = GG_DEFAULT_TIMEOUT;

			break;
		}

		case GG_STATE_READING_DATA:
		{
			char buf[1024], *tmp, *host;
			int port = GG_DEFAULT_PORT;
			struct in_addr addr;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_READING_DATA\n");

			/* czytamy liniê z gniazda i obcinamy \r\n. */
			gg_read_line(sess->fd, buf, sizeof(buf) - 1);
			gg_chomp(buf);
			gg_debug(GG_DEBUG_TRAFFIC, "// gg_watch_fd() received http header (%s)\n", buf);
	
			/* sprawdzamy, czy wszystko w porz±dku. */
			if (strncmp(buf, "HTTP/1.", 7) || strncmp(buf + 9, "200", 3)) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() that's not what we've expected, trying direct connection\n");

				close(sess->fd);

				/* je¶li otrzymali¶my jakie¶ dziwne informacje,
				 * próbujemy siê ³±czyæ z pominiêciem huba. */
				if (sess->proxy_addr && sess->proxy_port) {
					if ((sess->fd = gg_connect(&sess->proxy_addr, sess->proxy_port, sess->async)) == -1) {
						/* trudno. nie wysz³o. */
						gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to proxy failed (errno=%d, %s)\n", errno, strerror(errno));
						goto fail_connecting;
					}

					sess->state = GG_STATE_CONNECTING_GG;
					sess->check = GG_CHECK_WRITE;
					sess->timeout = GG_DEFAULT_TIMEOUT;
					break;
				}
				
				sess->port = GG_DEFAULT_PORT;

				/* ³±czymy siê na port 8074 huba. */
				if ((sess->fd = gg_connect(&sess->hub_addr, sess->port, sess->async)) == -1) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s), trying https\n", errno, strerror(errno));

					sess->port = GG_HTTPS_PORT;
					
					/* ³±czymy siê na port 443. */
					if ((sess->fd = gg_connect(&sess->hub_addr, sess->port, sess->async)) == -1) {
						gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s)\n", errno, strerror(errno));
						goto fail_connecting;
					}
				}
				
				sess->state = GG_STATE_CONNECTING_GG;
				sess->check = GG_CHECK_WRITE;
				sess->timeout = GG_DEFAULT_TIMEOUT;
				break;
			}
	
			/* ignorujemy resztê nag³ówka. */
			while (strcmp(buf, "\r\n") && strcmp(buf, ""))
				gg_read_line(sess->fd, buf, sizeof(buf) - 1);

			/* czytamy pierwsz± liniê danych. */
			gg_read_line(sess->fd, buf, sizeof(buf) - 1);
			gg_chomp(buf);
			
			/* je¶li pierwsza liczba w linii nie jest równa zeru,
			 * oznacza to, ¿e mamy wiadomo¶æ systemow±. */
			if (atoi(buf)) {
				char tmp[1024], *foo, *sysmsg_buf = NULL;
				int len = 0;
				
				while (gg_read_line(sess->fd, tmp, sizeof(tmp) - 1)) {
					if (!(foo = realloc(sysmsg_buf, len + strlen(tmp) + 2))) {
						gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() out of memory for system message, ignoring\n");
						break;
					}

					sysmsg_buf = foo;

					if (!len)
						strcpy(sysmsg_buf, tmp);
					else
						strcat(sysmsg_buf, tmp);
					
					len += strlen(tmp);
				}
				
				e->type = GG_EVENT_MSG;
				e->event.msg.msgclass = atoi(buf);
				e->event.msg.sender = 0;
				e->event.msg.message = sysmsg_buf;
			}
	
			close(sess->fd);
	
			gg_debug(GG_DEBUG_TRAFFIC, "// gg_watch_fd() received http data (%s)\n", buf);

			/* analizujemy otrzymane dane. */
			tmp = buf;
			
			while (*tmp && *tmp != ' ')
				tmp++;
			while (*tmp && *tmp == ' ')
				tmp++;
			host = tmp;
			while (*tmp && *tmp != ' ')
				tmp++;
			*tmp = 0;

			if ((tmp = strchr(host, ':'))) {
				*tmp = 0;
				port = atoi(tmp + 1);
			}

			if (!strcmp(host, "notoperating")) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() service unavailable\n", errno, strerror(errno));
				sess->fd = -1;
				goto fail_unavailable;
			}

			addr.s_addr = inet_addr(host);
			sess->server_addr = addr.s_addr;

			if (!gg_proxy_http_only && sess->proxy_addr && sess->proxy_port) {
				/* je¶li mamy proxy, ³±czymy siê z nim. */
				if ((sess->fd = gg_connect(&sess->proxy_addr, sess->proxy_port, sess->async)) == -1) {
					/* nie wysz³o? trudno. */
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to proxy failed (errno=%d, %s)\n", errno, strerror(errno));
					goto fail_connecting;
				}
				
				sess->state = GG_STATE_CONNECTING_GG;
				sess->check = GG_CHECK_WRITE;
				sess->timeout = GG_DEFAULT_TIMEOUT;
				break;
			}

			sess->port = port;

			/* ³±czymy siê z w³a¶ciwym serwerem. */
			if ((sess->fd = gg_connect(&addr, sess->port, sess->async)) == -1) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s), trying https\n", errno, strerror(errno));

				sess->port = GG_HTTPS_PORT;

				/* nie wysz³o? próbujemy portu 443. */
				if ((sess->fd = gg_connect(&addr, GG_HTTPS_PORT, sess->async)) == -1) {
					/* ostatnia deska ratunku zawiod³a?
					 * w takim razie zwijamy manatki. */
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s)\n", errno, strerror(errno));
					goto fail_connecting;
				}
			}

			sess->state = GG_STATE_CONNECTING_GG;
			sess->check = GG_CHECK_WRITE;
			sess->timeout = GG_DEFAULT_TIMEOUT;
		
			break;
		}

		case GG_STATE_CONNECTING_GG:
		{
			int res = 0, res_size = sizeof(res);

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_CONNECTING_GG\n");

			/* je¶li wyst±pi³ b³±d podczas ³±czenia siê... */
			if (sess->async && (sess->timeout == 0 || getsockopt(sess->fd, SOL_SOCKET, SO_ERROR, &res, &res_size) || res)) {
				/* je¶li nie uda³o siê po³±czenie z proxy,
				 * nie mamy czego próbowaæ wiêcej. */
				if (sess->proxy_addr && sess->proxy_port) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to proxy failed (errno=%d, %s)\n", res, strerror(res));
					goto fail_connecting;
				}

				close(sess->fd);
				sess->fd = -1;

#ifdef ETIMEDOUT
				if (sess->timeout == 0)
					errno = ETIMEDOUT;
#endif

#ifdef __GG_LIBGADU_HAVE_OPENSSL
				/* je¶li logujemy siê po TLS, nie próbujemy
				 * siê ³±czyæ ju¿ z niczym innym w przypadku
				 * b³êdu. nie do¶æ, ¿e nie ma sensu, to i
				 * trzeba by siê bawiæ w tworzenie na nowo
				 * SSL i SSL_CTX. */

				if (sess->ssl) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s)\n", res, strerror(res));
					goto fail_connecting;
				}
#endif

				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s), trying https\n", res, strerror(res));

				sess->port = GG_HTTPS_PORT;

				/* próbujemy na port 443. */
				if ((sess->fd = gg_connect(&sess->server_addr, sess->port, sess->async)) == -1) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s)\n", errno, strerror(errno));
					goto fail_connecting;
				}
			}

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connected\n");
			
			if (gg_proxy_http_only)
				sess->proxy_port = 0;

			/* je¶li mamy proxy, wy¶lijmy zapytanie. */
			if (sess->proxy_addr && sess->proxy_port) {
				char buf[100], *auth = gg_proxy_auth();
				struct in_addr addr;

				if (sess->server_addr)
					addr.s_addr = sess->server_addr;
				else
					addr.s_addr = sess->hub_addr;

				snprintf(buf, sizeof(buf), "CONNECT %s:%d HTTP/1.0\r\n", inet_ntoa(addr), sess->port);

				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() proxy request:\n//   %s", buf);
				
				/* wysy³amy zapytanie. jest ono na tyle krótkie,
				 * ¿e musi siê zmie¶ciæ w buforze gniazda. je¶li
				 * write() zawiedzie, sta³o siê co¶ z³ego. */
				if (write(sess->fd, buf, strlen(buf)) < (signed)strlen(buf)) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() can't send proxy request\n");
					if (auth)
						free(auth);
					goto fail_connecting;
				}

				if (auth) {
					gg_debug(GG_DEBUG_MISC, "//   %s", auth);
					if (write(sess->fd, auth, strlen(auth)) < (signed)strlen(auth)) {
						gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() can't send proxy request\n");
						free(auth);
						goto fail_connecting;
					}

					free(auth);
				}

				if (write(sess->fd, "\r\n", 2) < 2) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() can't send proxy request\n");
					goto fail_connecting;
				}
			}

#ifdef __GG_LIBGADU_HAVE_OPENSSL
			if (sess->ssl) {
				SSL_set_fd(sess->ssl, sess->fd);

				sess->state = GG_STATE_TLS_NEGOTIATION;
				sess->check = GG_CHECK_WRITE;
				sess->timeout = GG_DEFAULT_TIMEOUT;

				break;
			}
#endif

			sess->state = GG_STATE_READING_KEY;
			sess->check = GG_CHECK_READ;
			sess->timeout = GG_DEFAULT_TIMEOUT;

			break;
		}

#ifdef __GG_LIBGADU_HAVE_OPENSSL
		case GG_STATE_TLS_NEGOTIATION:
		{
			int res;
			X509 *peer;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_TLS_NEGOTIATION\n");

			if ((res = SSL_connect(sess->ssl)) <= 0) {
				int err = SSL_get_error(sess->ssl, res);

				if (res == 0) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() disconnected during TLS negotiation\n");

					e->type = GG_EVENT_CONN_FAILED;
					e->event.failure = GG_FAILURE_TLS;
					sess->state = GG_STATE_IDLE;
					close(sess->fd);
					sess->fd = -1;
					break;
				}
				
				if (err == SSL_ERROR_WANT_READ) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() SSL_connect() wants to read\n");

					sess->state = GG_STATE_TLS_NEGOTIATION;
					sess->check = GG_CHECK_READ;
					sess->timeout = GG_DEFAULT_TIMEOUT;

					break;
				} else if (err == SSL_ERROR_WANT_WRITE) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() SSL_connect() wants to write\n");

					sess->state = GG_STATE_TLS_NEGOTIATION;
					sess->check = GG_CHECK_WRITE;
					sess->timeout = GG_DEFAULT_TIMEOUT;

					break;
				} else {
					char buf[1024];

					ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));

					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() SSL_connect() bailed out: %s\n", buf);
 
					e->type = GG_EVENT_CONN_FAILED;
					e->event.failure = GG_FAILURE_TLS;
					sess->state = GG_STATE_IDLE;
					close(sess->fd);
					sess->fd = -1;
					break;
				}
			}

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() TLS negotiation succeded:\n//   cipher: %s\n", SSL_get_cipher_name(sess->ssl));

			peer = SSL_get_peer_certificate(sess->ssl);

			if (!peer)
				gg_debug(GG_DEBUG_MISC, "//   WARNING! unable to get peer certificate!\n");
			else {
				char buf[1024];

				X509_NAME_oneline(X509_get_subject_name(peer), buf, sizeof(buf));
				gg_debug(GG_DEBUG_MISC, "//   cert subject: %s\n", buf);

				X509_NAME_oneline(X509_get_issuer_name(peer), buf, sizeof(buf));
				gg_debug(GG_DEBUG_MISC, "//   cert issuer: %s\n", buf);
			}

			sess->state = GG_STATE_READING_KEY;
			sess->check = GG_CHECK_READ;
			sess->timeout = GG_DEFAULT_TIMEOUT;

			break;
		}
#endif

		case GG_STATE_READING_KEY:
		{
			struct gg_header *h;			
			struct gg_welcome *w;
			struct gg_login60 l;
			unsigned int hash;
			unsigned char *password = sess->password;
			int ret;
			
			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_READING_KEY\n");

			memset(&l, 0, sizeof(l));
			l.dunno2 = 0xbe;

			/* XXX bardzo, bardzo, bardzo g³upi pomys³ na pozbycie
			 * siê tekstu wrzucanego przez proxy. */
			if (sess->proxy_addr && sess->proxy_port) {
				char buf[100];

				strcpy(buf, "");
				gg_read_line(sess->fd, buf, sizeof(buf) - 1);
				gg_chomp(buf);
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() proxy response:\n//   %s\n", buf);
				
				while (strcmp(buf, "")) {
					gg_read_line(sess->fd, buf, sizeof(buf) - 1);
					gg_chomp(buf);
					if (strcmp(buf, ""))
						gg_debug(GG_DEBUG_MISC, "//   %s\n", buf);
				}

				/* XXX niech czeka jeszcze raz w tej samej
				 * fazie. g³upio, ale dzia³a. */
				sess->proxy_port = 0;
				
				break;
			}

			/* czytaj pierwszy pakiet. */
			if (!(h = gg_recv_packet(sess))) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() didn't receive packet (errno=%d, %s)\n", errno, strerror(errno));

				e->type = GG_EVENT_CONN_FAILED;
				e->event.failure = GG_FAILURE_READING;
				sess->state = GG_STATE_IDLE;
				errno2 = errno;
				close(sess->fd);
				errno = errno2;
				sess->fd = -1;
				break;
			}

			if (h->type != GG_WELCOME) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() invalid packet received\n");
				free(h);
				close(sess->fd);
				sess->fd = -1;
				errno = EINVAL;
				e->type = GG_EVENT_CONN_FAILED;
				e->event.failure = GG_FAILURE_INVALID;
				sess->state = GG_STATE_IDLE;
				break;
			}
	
			w = (struct gg_welcome*) ((char*) h + sizeof(struct gg_header));
			w->key = gg_fix32(w->key);

			hash = gg_login_hash(password, w->key);
	
			gg_debug(GG_DEBUG_DUMP, "// gg_watch_fd() challenge %.4x --> hash %.8x\n", w->key, hash);
	
			free(h);

			free(sess->password);
			sess->password = NULL;

			{
				struct in_addr dcc_ip;
				dcc_ip.s_addr = gg_dcc_ip;
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() gg_dcc_ip = %s\n", inet_ntoa(dcc_ip));
			}
			
			if (gg_dcc_ip == (unsigned long) inet_addr("255.255.255.255")) {
				struct sockaddr_in sin;
				int sin_len = sizeof(sin);

				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() detecting address\n");

				if (!getsockname(sess->fd, (struct sockaddr*) &sin, &sin_len)) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() detected address to %s\n", inet_ntoa(sin.sin_addr));
					l.local_ip = sin.sin_addr.s_addr;
				} else {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() unable to detect address\n");
					l.local_ip = 0;
				}
			} else 
				l.local_ip = gg_dcc_ip;
		
			l.uin = gg_fix32(sess->uin);
			l.hash = gg_fix32(hash);
			l.status = gg_fix32(sess->initial_status ? sess->initial_status : GG_STATUS_AVAIL);
			l.version = gg_fix32(sess->protocol_version);
			l.local_port = gg_fix16(gg_dcc_port);
			l.image_size = sess->image_size;
			
			if (sess->external_addr && sess->external_port > 1023) {
				l.external_ip = sess->external_addr;
				l.external_port = gg_fix16(sess->external_port);
			}

			gg_debug(GG_DEBUG_TRAFFIC, "// gg_watch_fd() sending GG_LOGIN60 packet\n");
			ret = gg_send_packet(sess, GG_LOGIN60, &l, sizeof(l), sess->initial_descr, (sess->initial_descr) ? strlen(sess->initial_descr) : 0, NULL);

			free(sess->initial_descr);
			sess->initial_descr = NULL;

			if (ret == -1) {
				gg_debug(GG_DEBUG_TRAFFIC, "// gg_watch_fd() sending packet failed. (errno=%d, %s)\n", errno, strerror(errno));
				errno2 = errno;
				close(sess->fd);
				errno = errno2;
				sess->fd = -1;
				e->type = GG_EVENT_CONN_FAILED;
				e->event.failure = GG_FAILURE_WRITING;
				sess->state = GG_STATE_IDLE;
				break;
			}
	
			sess->state = GG_STATE_READING_REPLY;

			break;
		}

		case GG_STATE_READING_REPLY:
		{
			struct gg_header *h;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_READING_REPLY\n");

			if (!(h = gg_recv_packet(sess))) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() didn't receive packet (errno=%d, %s)\n", errno, strerror(errno));
				e->type = GG_EVENT_CONN_FAILED;
				e->event.failure = GG_FAILURE_READING;
				sess->state = GG_STATE_IDLE;
				errno2 = errno;
				close(sess->fd);
				errno = errno2;
				sess->fd = -1;
				break;
			}
	
			if (h->type == GG_LOGIN_OK || h->type == GG_NEED_EMAIL) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() login succeded\n");
				e->type = GG_EVENT_CONN_SUCCESS;
				sess->state = GG_STATE_CONNECTED;
				sess->timeout = -1;
				sess->status = (sess->initial_status) ? sess->initial_status : GG_STATUS_AVAIL;
				free(h);
				break;
			}

			if (h->type == GG_LOGIN_FAILED) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() login failed\n");
				e->event.failure = GG_FAILURE_PASSWORD;
				errno = EACCES;
			} else if (h->type == GG_DISCONNECTING) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() too many incorrect password attempts\n");
				e->event.failure = GG_FAILURE_INTRUDER;
				errno = EACCES;
			} else {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() invalid packet\n");
				e->event.failure = GG_FAILURE_INVALID;
				errno = EINVAL;
			}

			e->type = GG_EVENT_CONN_FAILED;
			sess->state = GG_STATE_IDLE;
			errno2 = errno;
			close(sess->fd);
			errno = errno2;
			sess->fd = -1;
			free(h);

			break;
		}

		case GG_STATE_CONNECTED:
		{
			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_CONNECTED\n");

			sess->last_event = time(NULL);
			
			if ((res = gg_watch_fd_connected(sess, e)) == -1) {

				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() watch_fd_connected failed (errno=%d, %s)\n", errno, strerror(errno));

 				if (errno == EAGAIN) {
					e->type = GG_EVENT_NONE;
					res = 0;
				} else
					res = -1;
			}
			break;
		}
	}

done:
	if (res == -1) {
		free(e);
		e = NULL;
	}

	return e;
	
fail_connecting:
	if (sess->fd != -1) {
		errno2 = errno;
		close(sess->fd);
		errno = errno2;
		sess->fd = -1;
	}
	e->type = GG_EVENT_CONN_FAILED;
	e->event.failure = GG_FAILURE_CONNECTING;
	sess->state = GG_STATE_IDLE;
	goto done;

fail_resolving:
	e->type = GG_EVENT_CONN_FAILED;
	e->event.failure = GG_FAILURE_RESOLVING;
	sess->state = GG_STATE_IDLE;
	goto done;

fail_unavailable:
	e->type = GG_EVENT_CONN_FAILED;
	e->event.failure = GG_FAILURE_UNAVAILABLE;
	sess->state = GG_STATE_IDLE;
	goto done;
}
Esempio n. 17
0
/*
 * gg_watch_fd_connected() // funkcja wewnêtrzna
 *
 * patrzy na gniazdo, odbiera pakiet i wype³nia strukturê zdarzenia.
 *
 *  - sess - struktura opisuj±ca sesjê
 *  - e - opis zdarzenia
 *
 * 0, -1.
 */
static int gg_watch_fd_connected(struct gg_session *sess, struct gg_event *e)
{
	struct gg_header *h = NULL;
	char *p;

	gg_debug(GG_DEBUG_FUNCTION, "** gg_watch_fd_connected(%p, %p);\n", sess, e);

	if (!sess) {
		errno = EFAULT;
		return -1;
	}

	if (!(h = gg_recv_packet(sess))) {
		gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() gg_recv_packet failed (errno=%d, %s)\n", errno, strerror(errno));
		goto fail;
	}

	p = (char*) h + sizeof(struct gg_header);
	
	switch (h->type) {
		case GG_RECV_MSG:
		{
			if (h->length >= sizeof(struct gg_recv_msg))
				if (gg_handle_recv_msg(h, e, sess))
					goto fail;
			
			break;
		}

		case GG_NOTIFY_REPLY:
		{
			struct gg_notify_reply *n = (void*) p;
			unsigned int count, i;
			char *tmp;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received a notify reply\n");

			if (h->length < sizeof(*n)) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() incomplete packet\n");
				errno = EINVAL;
				goto fail;
			}

			if (gg_fix32(n->status) == GG_STATUS_BUSY_DESCR || gg_fix32(n->status) == GG_STATUS_NOT_AVAIL_DESCR || gg_fix32(n->status) == GG_STATUS_AVAIL_DESCR) {
				e->type = GG_EVENT_NOTIFY_DESCR;
				
				if (!(e->event.notify_descr.notify = (void*) malloc(sizeof(*n) * 2))) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() not enough memory for notify data\n");
					goto fail;
				}
				e->event.notify_descr.notify[1].uin = 0;
				memcpy(e->event.notify_descr.notify, p, sizeof(*n));
				e->event.notify_descr.notify[0].uin = gg_fix32(e->event.notify_descr.notify[0].uin);
				e->event.notify_descr.notify[0].status = gg_fix32(e->event.notify_descr.notify[0].status);
				e->event.notify_descr.notify[0].remote_port = gg_fix16(e->event.notify_descr.notify[0].remote_port);

				count = h->length - sizeof(*n);
				if (!(tmp = malloc(count + 1))) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() not enough memory for notify data\n");
					goto fail;
				}
				memcpy(tmp, p + sizeof(*n), count);
				tmp[count] = 0;
				e->event.notify_descr.descr = tmp;
				
			} else {
				e->type = GG_EVENT_NOTIFY;
				
				if (!(e->event.notify = (void*) malloc(h->length + 2 * sizeof(*n)))) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() not enough memory for notify data\n");
					goto fail;
				}
				
				memcpy(e->event.notify, p, h->length);
				count = h->length / sizeof(*n);
				e->event.notify[count].uin = 0;
				
				for (i = 0; i < count; i++) {
					e->event.notify[i].uin = gg_fix32(e->event.notify[i].uin);
					e->event.notify[i].status = gg_fix32(e->event.notify[i].status);
					e->event.notify[i].remote_port = gg_fix16(e->event.notify[i].remote_port);
				}
			}

			break;
		}

		case GG_STATUS:
		{
			struct gg_status *s = (void*) p;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received a status change\n");

			if (h->length >= sizeof(*s)) {
				e->type = GG_EVENT_STATUS;
				memcpy(&e->event.status, p, sizeof(*s));
				e->event.status.uin = gg_fix32(e->event.status.uin);
				e->event.status.status = gg_fix32(e->event.status.status);
				if (h->length > sizeof(*s)) {
					int len = h->length - sizeof(*s);
					char *buf = malloc(len + 1);
					if (buf) {
						memcpy(buf, p + sizeof(*s), len);
						buf[len] = 0;
					}
					e->event.status.descr = buf;
				} else
					e->event.status.descr = NULL;
			}

			break;
		}

		case GG_NOTIFY_REPLY60:
		{
			struct gg_notify_reply60 *n = (void*) p;
			unsigned int length = h->length, i = 0;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received a notify reply\n");

			e->type = GG_EVENT_NOTIFY60;
			e->event.notify60 = malloc(sizeof(*e->event.notify60));

			if (!e->event.notify60) {
				gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() not enough memory for notify data\n");
				goto fail;
			}

			e->event.notify60[0].uin = 0;
			
			while (length >= sizeof(struct gg_notify_reply60)) {
				uin_t uin = gg_fix32(n->uin);
				char *tmp;

				e->event.notify60[i].uin = uin & 0x00ffffff;
				e->event.notify60[i].status = n->status;
				e->event.notify60[i].remote_ip = n->remote_ip;
				e->event.notify60[i].remote_port = gg_fix16(n->remote_port);
				e->event.notify60[i].version = n->version;
				e->event.notify60[i].image_size = n->image_size;
				e->event.notify60[i].descr = NULL;
				e->event.notify60[i].time = 0;

				if (uin & 0x40000000)
					e->event.notify60[i].version |= GG_HAS_AUDIO_MASK;
				if (uin & 0x08000000)
					e->event.notify60[i].version |= GG_ERA_OMNIX_MASK;

				if (GG_S_D(n->status)) {
					unsigned char descr_len = *((char*) n + sizeof(struct gg_notify_reply60));

					if (descr_len < length) {
						if (!(e->event.notify60[i].descr = malloc(descr_len + 1))) {
							gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() not enough memory for notify data\n");
							goto fail;
						}

						memcpy(e->event.notify60[i].descr, (char*) n + sizeof(struct gg_notify_reply60) + 1, descr_len);
						e->event.notify60[i].descr[descr_len] = 0;

						/* XXX czas */
					}
					
					length -= sizeof(struct gg_notify_reply60) + descr_len + 1;
					n = (void*) ((char*) n + sizeof(struct gg_notify_reply60) + descr_len + 1);
				} else {
					length -= sizeof(struct gg_notify_reply60);
					n = (void*) ((char*) n + sizeof(struct gg_notify_reply60));
				}

				if (!(tmp = realloc(e->event.notify60, (i + 2) * sizeof(*e->event.notify60)))) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() not enough memory for notify data\n");
					free(e->event.notify60);
					goto fail;
				}

				e->event.notify60 = (void*) tmp;
				e->event.notify60[++i].uin = 0;
			}

			break;
		}
		
		case GG_STATUS60:
		{
			struct gg_status60 *s = (void*) p;
			uint32_t uin;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received a status change\n");

			if (h->length < sizeof(*s))
				break;

			uin = gg_fix32(s->uin);

			e->type = GG_EVENT_STATUS60;
			e->event.status60.uin = uin & 0x00ffffff;
			e->event.status60.status = s->status;
			e->event.status60.remote_ip = s->remote_ip;
			e->event.status60.remote_port = gg_fix16(s->remote_port);
			e->event.status60.version = s->version;
			e->event.status60.image_size = s->image_size;
			e->event.status60.descr = NULL;
			e->event.status60.time = 0;

			if (uin & 0x40000000)
				e->event.status60.version |= GG_HAS_AUDIO_MASK;
			if (uin & 0x08000000)
				e->event.status60.version |= GG_ERA_OMNIX_MASK;

			if (h->length > sizeof(*s)) {
				int len = h->length - sizeof(*s);
				char *buf = malloc(len + 1);

				if (buf) {
					memcpy(buf, (char*) p + sizeof(*s), len);
					buf[len] = 0;
				}

				e->event.status60.descr = buf;

				if (len > 4 && p[h->length - 5] == 0) {
					uint32_t t;
					memcpy(&t, p + h->length - 4, sizeof(uint32_t));
					e->event.status60.time = gg_fix32(t);
				}
			}

			break;
		}

		case GG_SEND_MSG_ACK:
		{
			struct gg_send_msg_ack *s = (void*) p;

			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received a message ack\n");

			if (h->length < sizeof(*s))
				break;

			e->type = GG_EVENT_ACK;
			e->event.ack.status = gg_fix32(s->status);
			e->event.ack.recipient = gg_fix32(s->recipient);
			e->event.ack.seq = gg_fix32(s->seq);

			break;
		}

		case GG_PONG: 
		{
			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received a pong\n");

			e->type = GG_EVENT_PONG;
			sess->last_pong = time(NULL);

			break;
		}

		case GG_DISCONNECTING:
		{
			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received disconnection warning\n");
			e->type = GG_EVENT_DISCONNECT;
			break;
		}

		case GG_PUBDIR50_REPLY:
		{
			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received pubdir/search reply\n");
			if (gg_pubdir50_handle_reply(e, p, h->length) == -1)
				goto fail;
			break;
		}

		case GG_USERLIST_REPLY:
		{
			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received userlist reply\n");

			if (h->length < 1)
				break;

			/* je¶li odpowied¼ na eksport, wywo³aj zdarzenie tylko
			 * gdy otrzymano wszystkie odpowiedzi */
			if (p[0] == GG_USERLIST_PUT_REPLY || p[0] == GG_USERLIST_PUT_MORE_REPLY) {
				if (--sess->userlist_blocks)
					break;

				p[0] = GG_USERLIST_PUT_REPLY;
			}

			if (h->length > 1) {
				char *tmp;
				unsigned int len = (sess->userlist_reply) ? strlen(sess->userlist_reply) : 0;
				
				gg_debug(GG_DEBUG_MISC, "userlist_reply=%p, len=%d\n", sess->userlist_reply, len);
				
				if (!(tmp = realloc(sess->userlist_reply, len + h->length))) {
					gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() not enough memory for userlist reply\n");
					free(sess->userlist_reply);
					sess->userlist_reply = NULL;
					goto fail;
				}

				sess->userlist_reply = tmp;
				sess->userlist_reply[len + h->length - 1] = 0;
				memcpy(sess->userlist_reply + len, p + 1, h->length - 1);
			}

			if (p[0] == GG_USERLIST_GET_MORE_REPLY)
				break;

			e->type = GG_EVENT_USERLIST;
			e->event.userlist.type = p[0];
			e->event.userlist.reply = sess->userlist_reply;
			sess->userlist_reply = NULL;

			break;
		}

		default:
			gg_debug(GG_DEBUG_MISC, "// gg_watch_fd_connected() received unknown packet 0x%.2x\n", h->type);
	}
	
	free(h);
	return 0;

fail:
	free(h);
	return -1;
}
Esempio n. 18
0
/*
 * gg_handle_recv_msg() // funkcja wewnêtrzna
 *
 * obs³uguje pakiet z przychodz±c± wiadomo¶ci±, rozbijaj±c go na dodatkowe
 * struktury (konferencje, kolorki) w razie potrzeby.
 *
 *  - h - nag³ówek pakietu
 *  - e - opis zdarzenia
 *
 * 0, -1.
 */
static int gg_handle_recv_msg(struct gg_header *h, struct gg_event *e, struct gg_session *sess)
{
	struct gg_recv_msg *r = (struct gg_recv_msg*) ((char*) h + sizeof(struct gg_header));
	char *p, *packet_end = (char*) r + h->length;

	gg_debug(GG_DEBUG_FUNCTION, "** gg_handle_recv_msg(%p, %p);\n", h, e);

	if (!r->seq && !r->msgclass) {
		gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() oops, silently ignoring the bait\n");
		e->type = GG_EVENT_NONE;
		return 0;
	}
	
	for (p = (char*) r + sizeof(*r); *p; p++) {
		if (*p == 0x02 && p == packet_end - 1) {
			gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() received ctcp packet\n");
			break;
		}
		if (p >= packet_end) {
			gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() malformed packet, message out of bounds (0)\n");
			goto malformed;
		}
	}
	
	p++;

	/* przeanalizuj dodatkowe opcje */
	while (p < packet_end) {
		switch (*p) {
			case 0x01:		/* konferencja */
			{
				struct gg_msg_recipients *m = (void*) p;
				uint32_t i, count;
			
				p += sizeof(*m);
			
				if (p > packet_end) {
					gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() packet out of bounds (1)\n");
					goto malformed;
				}

				count = gg_fix32(m->count);

				if (p + count * sizeof(uin_t) > packet_end || p + count * sizeof(uin_t) < p || count > 0xffff) {
					gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() packet out of bounds (1.5)\n");
					goto malformed;
				}
			
				if (!(e->event.msg.recipients = (void*) malloc(count * sizeof(uin_t)))) {
					gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() not enough memory for recipients data\n");
					goto fail;
				}
			
				for (i = 0; i < count; i++, p += sizeof(uint32_t)) {
					uint32_t u;
					memcpy(&u, p, sizeof(uint32_t));
					e->event.msg.recipients[i] = gg_fix32(u);
				}
				
				e->event.msg.recipients_count = count;
				
				break;
			}

			case 0x02:		/* richtext */
			{
				uint16_t len;
				char *buf;
			
				if (p + 3 > packet_end) {
					gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() packet out of bounds (2)\n");
					goto malformed;
				}

				memcpy(&len, p + 1, sizeof(uint16_t));
				len = gg_fix16(len);

				if (!(buf = malloc(len))) {
					gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() not enough memory for richtext data\n");
					goto fail;
				}

				p += 3;

				if (p + len > packet_end) {
					gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() packet out of bounds (3)\n");
					free(buf);
					goto malformed;
				}
				
				memcpy(buf, p, len);

				e->event.msg.formats = buf;
				e->event.msg.formats_length = len;

				p += len;

				break;
			}

			case 0x04:		/* image_request */
			{
				struct gg_msg_image_request *i = (void*) p;

				if (p + sizeof(*i) > packet_end) {
					gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() packet out of bounds (3)\n");
					goto malformed;
				}

				e->event.image_request.sender = gg_fix32(r->sender);
				e->event.image_request.size = gg_fix32(i->size);
				e->event.image_request.crc32 = gg_fix32(i->crc32);

				e->type = GG_EVENT_IMAGE_REQUEST;

				return 0;
			}

			case 0x05:		/* image_reply */
			case 0x06:
			{
				struct gg_msg_image_reply *rep = (void*) p;

				if (p + sizeof(struct gg_msg_image_reply) == packet_end) {

					/* pusta odpowied¼ - klient po drugiej stronie nie ma ¿±danego obrazka */

					e->type = GG_EVENT_IMAGE_REPLY;
					e->event.image_reply.sender = gg_fix32(r->sender);
					e->event.image_reply.size = 0;
					e->event.image_reply.crc32 = gg_fix32(rep->crc32);
					e->event.image_reply.filename = NULL;
					e->event.image_reply.image = NULL;
					return 0;

				} else if (p + sizeof(struct gg_msg_image_reply) + 1 > packet_end) {

					gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() packet out of bounds (4)\n");
					goto malformed;
				}

				rep->size = gg_fix32(rep->size);
				rep->crc32 = gg_fix32(rep->crc32);
				gg_image_queue_parse(e, p, (unsigned int)(packet_end - p), sess, gg_fix32(r->sender));

				return 0;
			}

			default:
			{
				gg_debug(GG_DEBUG_MISC, "// gg_handle_recv_msg() unknown payload 0x%.2x\n", *p);
				p = packet_end;
			}
		}
	}

	e->type = GG_EVENT_MSG;
	e->event.msg.msgclass = gg_fix32(r->msgclass);
	e->event.msg.sender = gg_fix32(r->sender);
	e->event.msg.time = gg_fix32(r->time);
	e->event.msg.message = strdup((char*) r + sizeof(*r));

	return 0;

malformed:
	e->type = GG_EVENT_NONE;

	free(e->event.msg.recipients);
	free(e->event.msg.formats);

	return 0;

fail:
	free(e->event.msg.recipients);
	free(e->event.msg.formats);
	return -1;
}
Esempio n. 19
0
/**
 * \internal Obsługuje pakiet informacji o połączeniu bezpośrednim.
 *
 * \param sess Struktura sesji
 * \param e Struktura zdarzenia
 * \param payload Treść pakietu
 * \param len Długość pakietu
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
int gg_dcc7_handle_info(struct gg_session *sess, struct gg_event *e, void *payload, int len)
{
	struct gg_dcc7_info *p = payload;
	struct gg_dcc7 *dcc;
	char *tmp;

	gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_info(%p, %p, %p, %d)\n", sess, e, payload, len);

	if (!(dcc = gg_dcc7_session_find(sess, p->id, gg_fix32(p->uin)))) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unknown dcc session\n");
		return 0;
	}
	
	if (p->type != GG_DCC7_TYPE_P2P) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unhandled transfer type (%d)\n", p->type);
		e->type = GG_EVENT_DCC7_ERROR;
		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
		return 0;
	}

	if ((dcc->remote_addr = inet_addr(p->info)) == INADDR_NONE) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid IP address\n");
		e->type = GG_EVENT_DCC7_ERROR;
		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
		return 0;
	}

	if (!(tmp = strchr(p->info, ' ')) || !(dcc->remote_port = atoi(tmp + 1))) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid IP port\n");
		e->type = GG_EVENT_DCC7_ERROR;
		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
		return 0;
	}

	// jeśli nadal czekamy na połączenie przychodzące, a druga strona nie
	// daje rady i oferuje namiary na siebie, bierzemy co dają.

	if (dcc->state != GG_STATE_WAITING_FOR_INFO && (dcc->state != GG_STATE_LISTENING || dcc->reverse)) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid state\n");
		e->type = GG_EVENT_DCC7_ERROR;
		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
		return 0;
	}

	if (dcc->state == GG_STATE_LISTENING) {
		close(dcc->fd);
		dcc->fd = -1;
		dcc->reverse = 1;
	}
	
	if (dcc->type == GG_SESSION_DCC7_SEND) {
		e->type = GG_EVENT_DCC7_ACCEPT;
		e->event.dcc7_accept.dcc7 = dcc;
		e->event.dcc7_accept.type = gg_fix32(p->type);
		e->event.dcc7_accept.remote_ip = dcc->remote_addr;
		e->event.dcc7_accept.remote_port = dcc->remote_port;
	} else {
		e->type = GG_EVENT_DCC7_PENDING;
	}

	if (gg_dcc7_connect(sess, dcc) == -1) {
		if (gg_dcc7_reverse_connect(dcc) == -1) {
			e->type = GG_EVENT_DCC7_ERROR;
			e->event.dcc7_error = GG_ERROR_DCC7_NET;
			return 0;
		}
	}

	return 0;
}
Esempio n. 20
0
/**
 * Funkcja wywoływana po zaobserwowaniu zmian na deskryptorze połączenia.
 *
 * Funkcja zwraca strukturę zdarzenia \c gg_event. Jeśli rodzaj zdarzenia
 * to \c GG_EVENT_NONE, nie wydarzyło się jeszcze nic wartego odnotowania.
 * Strukturę zdarzenia należy zwolnić funkcja \c gg_event_free().
 *
 * \param dcc Struktura połączenia
 *
 * \return Struktura zdarzenia lub \c NULL jeśli wystąpił błąd
 *
 * \ingroup dcc7
 */
struct gg_event *gg_dcc7_watch_fd(struct gg_dcc7 *dcc)
{
	struct gg_event *e;

	gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_watch_fd(%p)\n", dcc);

	if (!dcc || (dcc->type != GG_SESSION_DCC7_SEND && dcc->type != GG_SESSION_DCC7_GET && dcc->type != GG_SESSION_DCC7_VOICE)) {
		gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() invalid parameters\n");
		errno = EINVAL;
		return NULL;
	}

	if (!(e = malloc(sizeof(struct gg_event)))) {
		gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() not enough memory\n");
		return NULL;
	}

	memset(e, 0, sizeof(struct gg_event));
	e->type = GG_EVENT_NONE;

	switch (dcc->state) {
		case GG_STATE_LISTENING:
		{
			struct sockaddr_in sin;
			SOCKET fd;
			int one = 1;
			unsigned int sin_len = sizeof(sin);

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_LISTENING\n");

			if ((fd = accept(dcc->fd, (struct sockaddr*) &sin, &sin_len)) == -1) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() accept() failed (%s)\n", strerror(errno));
				return e;
			}

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connection from %s:%d\n", inet_ntoa(sin.sin_addr), htons(sin.sin_port));

#ifdef FIONBIO
			if (ioctl(fd, FIONBIO, &one) == -1) {
#else
			if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
#endif
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() can't set nonblocking (%s)\n", strerror(errno));
				gg_sock_close(fd);
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			gg_sock_close(dcc->fd);
			dcc->fd = fd;

			dcc->state = GG_STATE_READING_ID;
			dcc->check = GG_CHECK_READ;
			dcc->timeout = GG_DEFAULT_TIMEOUT;
			dcc->incoming = 1;

			dcc->remote_port = ntohs(sin.sin_port);
			dcc->remote_addr = sin.sin_addr.s_addr;

			e->type = GG_EVENT_DCC7_CONNECTED;
			e->event.dcc7_connected.dcc7 = dcc;

			return e;
		}

		case GG_STATE_CONNECTING:
		{
			int res = 0, error = 0;
			unsigned int error_size = sizeof(error);

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_CONNECTING\n");

			dcc->soft_timeout = 0;

			if (dcc->timeout == 0)
				error = ETIMEDOUT;

			if (error || (res = gg_getsockopt(dcc->fd, SOL_SOCKET, SO_ERROR, &error, &error_size)) == -1 || error != 0) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connection failed (%s)\n", (res == -1) ? strerror(errno) : strerror(error));

				if (dcc->relay) {
					for (dcc->relay_index++; dcc->relay_index < dcc->relay_count; dcc->relay_index++) {
						dcc->remote_addr = dcc->relay_list[dcc->relay_index].addr;
						dcc->remote_port = dcc->relay_list[dcc->relay_index].port;

						if (gg_dcc7_connect(dcc) == 0)
							break;
					}

					if (dcc->relay_index >= dcc->relay_count) {
						gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() no relay available");
						e->type = GG_EVENT_DCC7_ERROR;
						e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
						e->event.dcc7_error_ex.dcc7 = dcc;
						return e;
					}
				} else {
					if (gg_dcc7_reverse_connect(dcc) != -1) {
						e->type = GG_EVENT_DCC7_PENDING;
						e->event.dcc7_pending.dcc7 = dcc;
					} else {
						e->type = GG_EVENT_DCC7_ERROR;
						e->event.dcc7_error = GG_ERROR_DCC7_NET;
						e->event.dcc7_error_ex.dcc7 = dcc;
					}

					return e;
				}
			}

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connected, sending id\n");

			dcc->state = GG_STATE_SENDING_ID;
			dcc->check = GG_CHECK_WRITE;
			dcc->timeout = GG_DEFAULT_TIMEOUT;
			dcc->incoming = 0;

			return e;
		}

		case GG_STATE_READING_ID:
		{
			int res;

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_READING_ID\n");

			if (!dcc->relay) {
				struct gg_dcc7_welcome_p2p welcome, welcome_ok;
				welcome_ok.id = dcc->cid;

				if ((res = gg_sock_read(dcc->fd, &welcome, sizeof(welcome))) != sizeof(welcome)) {
					gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (%d, %s)\n", res, strerror(errno));
					e->type = GG_EVENT_DCC7_ERROR;
					e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
					e->event.dcc7_error_ex.dcc7 = dcc;
					return e;
				}

				if (memcmp(&welcome, &welcome_ok, sizeof(welcome))) {
					gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() invalid id\n");
					e->type = GG_EVENT_DCC7_ERROR;
					e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
					e->event.dcc7_error_ex.dcc7 = dcc;
					return e;
				}
			} else {
				struct gg_dcc7_welcome_server welcome, welcome_ok;
				welcome_ok.magic = GG_DCC7_WELCOME_SERVER;
				welcome_ok.id = dcc->cid;

				if ((res = gg_sock_read(dcc->fd, &welcome, sizeof(welcome))) != sizeof(welcome)) {
					gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (%d, %s)\n", res, strerror(errno));
					e->type = GG_EVENT_DCC7_ERROR;
					e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
					e->event.dcc7_error_ex.dcc7 = dcc;
					return e;
				}

				if (memcmp(&welcome, &welcome_ok, sizeof(welcome)) != 0) {
					gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() invalid id\n");
					e->type = GG_EVENT_DCC7_ERROR;
					e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
					e->event.dcc7_error_ex.dcc7 = dcc;
					return e;
				}
			}

			if (dcc->incoming) {
				dcc->state = GG_STATE_SENDING_ID;
				dcc->check = GG_CHECK_WRITE;
				dcc->timeout = GG_DEFAULT_TIMEOUT;
			} else {
				gg_dcc7_postauth_fixup(dcc);
				dcc->timeout = GG_DEFAULT_TIMEOUT;
			}

			return e;
		}

		case GG_STATE_SENDING_ID:
		{
			int res;

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_SENDING_ID\n");

			if (!dcc->relay) {
				struct gg_dcc7_welcome_p2p welcome;

				welcome.id = dcc->cid;

				if ((res = gg_sock_write(dcc->fd, &welcome, sizeof(welcome))) != sizeof(welcome)) {
					gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (%d, %s)", res, strerror(errno));
					e->type = GG_EVENT_DCC7_ERROR;
					e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
					e->event.dcc7_error_ex.dcc7 = dcc;
					return e;
				}
			} else {
				struct gg_dcc7_welcome_server welcome;

				welcome.magic = gg_fix32(GG_DCC7_WELCOME_SERVER);
				welcome.id = dcc->cid;

				if ((res = gg_sock_write(dcc->fd, &welcome, sizeof(welcome))) != sizeof(welcome)) {
					gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (%d, %s)\n", res, strerror(errno));
					e->type = GG_EVENT_DCC7_ERROR;
					e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
					e->event.dcc7_error_ex.dcc7 = dcc;
					return e;
				}
			}

			if (dcc->incoming) {
				gg_dcc7_postauth_fixup(dcc);
				dcc->timeout = GG_DEFAULT_TIMEOUT;
			} else {
				dcc->state = GG_STATE_READING_ID;
				dcc->check = GG_CHECK_READ;
				dcc->timeout = GG_DEFAULT_TIMEOUT;
			}

			return e;
		}

		case GG_STATE_SENDING_FILE:
		{
			char buf[1024];
			int chunk, res;

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_SENDING_FILE (offset=%d, size=%d)\n", dcc->offset, dcc->size);

			if (dcc->offset >= dcc->size) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() offset >= size, finished\n");
				e->type = GG_EVENT_DCC7_DONE;
				e->event.dcc7_done.dcc7 = dcc;
				return e;
			}

			if (dcc->seek && lseek(dcc->file_fd, dcc->offset, SEEK_SET) == (off_t) -1) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() lseek() failed (%s)\n", strerror(errno));
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_FILE;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			if ((chunk = dcc->size - dcc->offset) > sizeof(buf))
				chunk = sizeof(buf);

			if ((res = read(dcc->file_fd, buf, chunk)) < 1) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (res=%d, %s)\n", res, strerror(errno));
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = (res == -1) ? GG_ERROR_DCC7_FILE : GG_ERROR_DCC7_EOF;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			if ((res = gg_sock_write(dcc->fd, buf, res)) == -1) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (%s)\n", strerror(errno));
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_NET;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			dcc->offset += res;

			if (dcc->offset >= dcc->size) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() finished\n");
				e->type = GG_EVENT_DCC7_DONE;
				e->event.dcc7_done.dcc7 = dcc;
				return e;
			}

			dcc->state = GG_STATE_SENDING_FILE;
			dcc->check = GG_CHECK_WRITE;
			dcc->timeout = GG_DCC7_TIMEOUT_SEND;

			return e;
		}

		case GG_STATE_GETTING_FILE:
		{
			char buf[1024];
			int res, wres;

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_GETTING_FILE (offset=%d, size=%d)\n", dcc->offset, dcc->size);

			if (dcc->offset >= dcc->size) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() finished\n");
				e->type = GG_EVENT_DCC7_DONE;
				e->event.dcc7_done.dcc7 = dcc;
				return e;
			}

			if ((res = gg_sock_read(dcc->fd, buf, sizeof(buf))) < 1) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (fd=%d, res=%d, %s)\n", dcc->fd, res, strerror(errno));
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = (res == -1) ? GG_ERROR_DCC7_NET : GG_ERROR_DCC7_EOF;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			// XXX zapisywać do skutku?

			if ((wres = write(dcc->file_fd, buf, res)) < res) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (fd=%d, res=%d, %s)\n", dcc->file_fd, wres, strerror(errno));
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_FILE;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			dcc->offset += res;

			if (dcc->offset >= dcc->size) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() finished\n");
				e->type = GG_EVENT_DCC7_DONE;
				e->event.dcc7_done.dcc7 = dcc;
				return e;
			}

			dcc->state = GG_STATE_GETTING_FILE;
			dcc->check = GG_CHECK_READ;
			dcc->timeout = GG_DCC7_TIMEOUT_GET;

			return e;
		}

		case GG_STATE_RESOLVING_RELAY:
		{
			struct in_addr addr;

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_RESOLVING_RELAY\n");

			if (gg_sock_read(dcc->fd, &addr, sizeof(addr)) < sizeof(addr) || addr.s_addr == INADDR_NONE) {
				int errno_save = errno;

				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() resolving failed\n");
				gg_sock_close(dcc->fd);
				dcc->fd = -1;
				dcc->sess->resolver_cleanup(&dcc->resolver, 0);
				errno = errno_save;
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() resolved, connecting to %s:%d\n", inet_ntoa(addr), GG_RELAY_PORT);

			if ((dcc->fd = gg_connect(&addr, GG_RELAY_PORT, 1)) == -1) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connection failed (errno=%d, %s), critical\n", errno, strerror(errno));
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}
			
			dcc->state = GG_STATE_CONNECTING_RELAY;
			dcc->check = GG_CHECK_WRITE;
			dcc->timeout = GG_DEFAULT_TIMEOUT;

			return e;
		}

		case GG_STATE_CONNECTING_RELAY:
		{
			int res;
			unsigned int res_size = sizeof(res);
			struct gg_dcc7_relay_req pkt;

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_CONNECTING_RELAY\n");
			
			if (gg_getsockopt(dcc->fd, SOL_SOCKET, SO_ERROR, &res, &res_size) != 0 || res != 0) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connection failed (errno=%d, %s)\n", res, strerror(res));
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			memset(&pkt, 0, sizeof(pkt));
			pkt.magic = gg_fix32(GG_DCC7_RELAY_REQUEST);
			pkt.len = gg_fix32(sizeof(pkt));
			pkt.id = dcc->cid;
			pkt.type = gg_fix16(GG_DCC7_RELAY_TYPE_SERVER);
			pkt.dunno1 = gg_fix16(GG_DCC7_RELAY_DUNNO1);

			gg_debug_dump_session((dcc) ? (dcc)->sess : NULL, &pkt, sizeof(pkt), "// gg_dcc7_watch_fd() send pkt(0x%.2x)\n", gg_fix32(pkt.magic));

			if ((res = gg_sock_write(dcc->fd, &pkt, sizeof(pkt))) != sizeof(pkt)) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() sending failed\n");
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			dcc->state = GG_STATE_READING_RELAY;
			dcc->check = GG_CHECK_READ;
			dcc->timeout = GG_DEFAULT_TIMEOUT;

			return e;
		}

		case GG_STATE_READING_RELAY:
		{
			char buf[256];
			struct gg_dcc7_relay_reply *pkt;
			struct gg_dcc7_relay_reply_server srv;
			int res;
			int i;

			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_READING_RELAY\n");

			if ((res = gg_sock_read(dcc->fd, buf, sizeof(buf))) < sizeof(*pkt)) {
				if (res == 0)
					errno = ECONNRESET;
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (%d, %s)\n", res, strerror(errno));
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			pkt = (struct gg_dcc7_relay_reply*) buf;

			if (gg_fix32(pkt->magic) != GG_DCC7_RELAY_REPLY || gg_fix32(pkt->rcount) < 1 || gg_fix32(pkt->rcount > 256) || gg_fix32(pkt->len) < sizeof(*pkt) + gg_fix32(pkt->rcount) * sizeof(srv)) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_wathc_fd() invalid reply\n");
				errno = EINVAL;
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

		        gg_debug_dump_session((dcc) ? (dcc)->sess : NULL, buf, res, "// gg_dcc7_get_relay() read pkt(0x%.2x)\n", gg_fix32(pkt->magic));

			free(dcc->relay_list);

			dcc->relay_index = 0;
			dcc->relay_count = gg_fix32(pkt->rcount);
			dcc->relay_list = malloc(dcc->relay_count * sizeof(gg_dcc7_relay_t));

			if (dcc->relay_list == NULL) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() not enough memory");
				dcc->relay_count = 0;
				free(e);
				return NULL;
			}

			for (i = 0; i < dcc->relay_count; i++) {
				struct in_addr addr;

				memcpy(&srv, buf + sizeof(*pkt) + i * sizeof(srv), sizeof(srv));
				dcc->relay_list[i].addr = srv.addr;
				dcc->relay_list[i].port = gg_fix16(srv.port);
				dcc->relay_list[i].family = srv.family;

				addr.s_addr = srv.addr;
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "//    %s %d %d\n", inet_ntoa(addr), gg_fix16(srv.port), srv.family);
			}
			
			dcc->relay = 1;

			for (; dcc->relay_index < dcc->relay_count; dcc->relay_index++) {
				dcc->remote_addr = dcc->relay_list[dcc->relay_index].addr;
				dcc->remote_port = dcc->relay_list[dcc->relay_index].port;

				if (gg_dcc7_connect(dcc) == 0)
					break;
			}

			if (dcc->relay_index >= dcc->relay_count) {
				gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() no relay available");
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return e;
			}

			return e;
		}

		default:
		{
			gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_???\n");
			e->type = GG_EVENT_DCC7_ERROR;
			e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
			e->event.dcc7_error_ex.dcc7 = dcc;

			return e;
		}
	}

	return e;
}

/**
 * Zwalnia zasoby używane przez połączenie bezpośrednie.
 *
 * \param dcc Struktura połączenia
 *
 * \ingroup dcc7
 */
void gg_dcc7_free(struct gg_dcc7 *dcc)
{
	gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_free(%p)\n", dcc);

	if (!dcc)
		return;

	if (dcc->fd != -1)
		gg_sock_close(dcc->fd);

	if (dcc->file_fd != -1)
		close(dcc->file_fd);

	if (dcc->sess)
		gg_dcc7_session_remove(dcc->sess, dcc);

	free(dcc->relay_list);

	free(dcc);
}
Esempio n. 21
0
/**
 * Wysyła zapytanie katalogu publicznego do serwera.
 *
 * \param sess Struktura sesji
 * \param req Zapytanie
 *
 * \return Numer sekwencyjny zapytania lub 0 w przypadku błędu
 *
 * \ingroup pubdir50
 */
uint32_t gg_pubdir50(struct gg_session *sess, gg_pubdir50_t req)
{
	size_t size = 5;
	int i;
	uint32_t res;
	char *buf, *p;
	struct gg_pubdir50_request *r;

	gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_pubdir50(%p, %p);\n", sess, req);
	
	if (!sess || !req) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_pubdir50() invalid arguments\n");
		errno = EFAULT;
		return 0;
	}

	if (sess->state != GG_STATE_CONNECTED) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_pubdir50() not connected\n");
		errno = ENOTCONN;
		return 0;
	}

	for (i = 0; i < req->entries_count; i++) {
		/* wyszukiwanie bierze tylko pierwszy wpis */
		if (req->entries[i].num)
			continue;
		
		if (sess->encoding == GG_ENCODING_CP1250) {
			size += strlen(req->entries[i].field) + 1;
			size += strlen(req->entries[i].value) + 1;
		} else {
			char *tmp;

			tmp = gg_utf8_to_cp(req->entries[i].field);

			if (tmp == NULL)
				return -1;

			size += strlen(tmp) + 1;

			free(tmp);

			tmp = gg_utf8_to_cp(req->entries[i].value);

			if (tmp == NULL)
				return -1;

			size += strlen(tmp) + 1;

			free(tmp);
		}
	}

	if (!(buf = (char*)malloc(size))) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_pubdir50() out of memory (%d bytes)\n", size);
		return 0;
	}

	if (!req->seq)
		req->seq = (uint32_t)time(NULL);

	res = req->seq;

	r = (struct gg_pubdir50_request*) buf;
	r->type = req->type;
	r->seq = gg_fix32(req->seq);

	for (i = 0, p = buf + 5; i < req->entries_count; i++) {
		if (req->entries[i].num)
			continue;

		if (sess->encoding == GG_ENCODING_CP1250) {
			strcpy(p, req->entries[i].field);
			p += strlen(p) + 1;

			strcpy(p, req->entries[i].value);
			p += strlen(p) + 1;
		} else {
			char *tmp;

			tmp = gg_utf8_to_cp(req->entries[i].field);

			if (tmp == NULL) {
				free(buf);
				return -1;
			}

			strcpy(p, tmp);
			p += strlen(tmp) + 1;
			free(tmp);

			tmp = gg_utf8_to_cp(req->entries[i].value);

			if (tmp == NULL) {
				free(buf);
				return -1;
			}

			strcpy(p, tmp);
			p += strlen(tmp) + 1;
			free(tmp);
		}
	}

	if (gg_send_packet(sess, GG_PUBDIR50_REQUEST, buf, size, NULL, 0) == -1)
		res = 0;

	free(buf);

	return res;
}
Esempio n. 22
0
/**
 * Funkcja wywoływana po zaobserwowaniu zmian na deskryptorze połączenia.
 *
 * Funkcja zwraca strukturę zdarzenia \c gg_event. Jeśli rodzaj zdarzenia
 * to \c GG_EVENT_NONE, nie wydarzyło się jeszcze nic wartego odnotowania.
 * Strukturę zdarzenia należy zwolnić funkcja \c gg_event_free.
 *
 * \param h Struktura połączenia
 *
 * \return Struktura zdarzenia lub \c NULL jeśli wystąpił błąd
 *
 * \ingroup dcc6
 */
struct gg_event *gg_dcc_watch_fd(struct gg_dcc *h)
{
	struct gg_event *e;
	int foo;

	gg_debug(GG_DEBUG_FUNCTION, "** gg_dcc_watch_fd(%p);\n", h);

	if (!h || (h->type != GG_SESSION_DCC && h->type != GG_SESSION_DCC_SOCKET && h->type != GG_SESSION_DCC_SEND && h->type != GG_SESSION_DCC_GET && h->type != GG_SESSION_DCC_VOICE)) {
		gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() invalid argument\n");
		errno = EINVAL;
		return NULL;
	}

	if (!(e = (void*) calloc(1, sizeof(*e)))) {
		gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() not enough memory\n");
		return NULL;
	}

	e->type = GG_EVENT_NONE;

	if (h->type == GG_SESSION_DCC_SOCKET) {
		struct sockaddr_in sin;
		struct gg_dcc *c;
		int fd;
#ifdef FIONBIO
		int one = 1;
#endif
		socklen_t sin_len = sizeof(sin);

		if ((fd = accept(h->fd, (struct sockaddr*) &sin, &sin_len)) == -1) {
			gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() can't accept() new connection (errno=%d, %s)\n", errno, strerror(errno));
			return e;
		}

		gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() new direct connection from %s:%d\n", inet_ntoa(sin.sin_addr), htons(sin.sin_port));

#ifdef FIONBIO
		if (ioctl(fd, FIONBIO, &one) == -1) {
#else
		if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
#endif
			gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() can't set nonblocking (errno=%d, %s)\n", errno, strerror(errno));
			close(fd);
			e->type = GG_EVENT_DCC_ERROR;
			e->event.dcc_error = GG_ERROR_DCC_HANDSHAKE;
			return e;
		}

		if (!(c = (void*) calloc(1, sizeof(*c)))) {
			gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() not enough memory for client data\n");

			free(e);
			close(fd);
			return NULL;
		}

		c->fd = fd;
		c->check = GG_CHECK_READ;
		c->state = GG_STATE_READING_UIN_1;
		c->type = GG_SESSION_DCC;
		c->timeout = GG_DEFAULT_TIMEOUT;
		c->file_fd = -1;
		c->remote_addr = sin.sin_addr.s_addr;
		c->remote_port = ntohs(sin.sin_port);

		e->type = GG_EVENT_DCC_NEW;
		e->event.dcc_new = c;

		return e;
	} else {
		struct gg_dcc_tiny_packet tiny_pkt;
		struct gg_dcc_small_packet small_pkt;
		struct gg_dcc_big_packet big_pkt;
		int size, tmp, res;
		unsigned int utmp;
		socklen_t res_size = sizeof(res);
		char buf[1024], ack[] = "UDAG";

		struct gg_dcc_file_info_packet {
			struct gg_dcc_big_packet big;
			struct gg_file_info file_info;
		} GG_PACKED;
		struct gg_dcc_file_info_packet file_info_packet;

		switch (h->state) {
			case GG_STATE_READING_UIN_1:
			case GG_STATE_READING_UIN_2:
			{
				uin_t uin;

				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_READING_UIN_%d\n", (h->state == GG_STATE_READING_UIN_1) ? 1 : 2);

				gg_dcc_read(h->fd, &uin, sizeof(uin));

				if (h->state == GG_STATE_READING_UIN_1) {
					h->state = GG_STATE_READING_UIN_2;
					h->check = GG_CHECK_READ;
					h->timeout = GG_DEFAULT_TIMEOUT;
					h->peer_uin = gg_fix32(uin);
				} else {
					h->state = GG_STATE_SENDING_ACK;
					h->check = GG_CHECK_WRITE;
					h->timeout = GG_DEFAULT_TIMEOUT;
					h->uin = gg_fix32(uin);
					e->type = GG_EVENT_DCC_CLIENT_ACCEPT;
				}

				return e;
			}

			case GG_STATE_SENDING_ACK:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_SENDING_ACK\n");

				gg_dcc_write(h->fd, ack, 4);

				h->state = GG_STATE_READING_TYPE;
				h->check = GG_CHECK_READ;
				h->timeout = GG_DEFAULT_TIMEOUT;

				return e;

			case GG_STATE_READING_TYPE:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_TYPE\n");

				gg_dcc_read(h->fd, &small_pkt, sizeof(small_pkt));

				small_pkt.type = gg_fix32(small_pkt.type);

				switch (small_pkt.type) {
					case 0x0003:	/* XXX */
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() callback\n");
						h->type = GG_SESSION_DCC_SEND;
						h->state = GG_STATE_SENDING_FILE_INFO;
						h->check = GG_CHECK_WRITE;
						h->timeout = GG_DEFAULT_TIMEOUT;

						e->type = GG_EVENT_DCC_CALLBACK;

						break;

					case 0x0002:	/* XXX */
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() dialin\n");
						h->type = GG_SESSION_DCC_GET;
						h->state = GG_STATE_READING_REQUEST;
						h->check = GG_CHECK_READ;
						h->timeout = GG_DEFAULT_TIMEOUT;
						h->incoming = 1;

						break;

					default:
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() unknown dcc type (%.4x) from %ld\n", small_pkt.type, h->peer_uin);
						e->type = GG_EVENT_DCC_ERROR;
						e->event.dcc_error = GG_ERROR_DCC_HANDSHAKE;
				}

				return e;

			case GG_STATE_READING_REQUEST:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_REQUEST\n");

				gg_dcc_read(h->fd, &small_pkt, sizeof(small_pkt));

				small_pkt.type = gg_fix32(small_pkt.type);

				switch (small_pkt.type) {
					case 0x0001:	/* XXX */
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() file transfer request\n");
						h->state = GG_STATE_READING_FILE_INFO;
						h->check = GG_CHECK_READ;
						h->timeout = GG_DEFAULT_TIMEOUT;
						break;

					case 0x0003:	/* XXX */
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() voice chat request\n");
						h->state = GG_STATE_SENDING_VOICE_ACK;
						h->check = GG_CHECK_WRITE;
						h->timeout = GG_DCC_TIMEOUT_VOICE_ACK;
						h->type = GG_SESSION_DCC_VOICE;
						e->type = GG_EVENT_DCC_NEED_VOICE_ACK;

						break;

					default:
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() unknown dcc request (%.4x) from %ld\n", small_pkt.type, h->peer_uin);
						e->type = GG_EVENT_DCC_ERROR;
						e->event.dcc_error = GG_ERROR_DCC_HANDSHAKE;
				}

				return e;

			case GG_STATE_READING_FILE_INFO:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_FILE_INFO\n");

				gg_dcc_read(h->fd, &file_info_packet, sizeof(file_info_packet));

				memcpy(&h->file_info, &file_info_packet.file_info, sizeof(h->file_info));

				h->file_info.mode = gg_fix32(h->file_info.mode);
				h->file_info.size = gg_fix32(h->file_info.size);

				h->state = GG_STATE_SENDING_FILE_ACK;
				h->check = GG_CHECK_WRITE;
				h->timeout = GG_DCC_TIMEOUT_FILE_ACK;

				e->type = GG_EVENT_DCC_NEED_FILE_ACK;

				return e;

			case GG_STATE_SENDING_FILE_ACK:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_SENDING_FILE_ACK\n");

				big_pkt.type = gg_fix32(0x0006);	/* XXX */
				big_pkt.dunno1 = gg_fix32(h->offset);
				big_pkt.dunno2 = 0;

				gg_dcc_write(h->fd, &big_pkt, sizeof(big_pkt));

				h->state = GG_STATE_READING_FILE_HEADER;
				h->chunk_size = sizeof(big_pkt);
				h->chunk_offset = 0;
				if (!(h->chunk_buf = malloc(sizeof(big_pkt)))) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() out of memory\n");
					free(e);
					return NULL;
				}
				h->check = GG_CHECK_READ;
				h->timeout = GG_DEFAULT_TIMEOUT;

				return e;

			case GG_STATE_SENDING_VOICE_ACK:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_SENDING_VOICE_ACK\n");

				tiny_pkt.type = 0x01;	/* XXX */

				gg_dcc_write(h->fd, &tiny_pkt, sizeof(tiny_pkt));

				h->state = GG_STATE_READING_VOICE_HEADER;
				h->check = GG_CHECK_READ;
				h->timeout = GG_DEFAULT_TIMEOUT;

				h->offset = 0;

				return e;

			case GG_STATE_READING_FILE_HEADER:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_FILE_HEADER\n");

				tmp = recv(h->fd, h->chunk_buf + h->chunk_offset, h->chunk_size - h->chunk_offset, 0);

				if (tmp == -1) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() recv() failed (errno=%d, %s)\n", errno, strerror(errno));
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_NET;
					return e;
				}

				gg_dcc_debug_data("read", h->fd, h->chunk_buf + h->chunk_offset, h->chunk_size - h->chunk_offset);

				h->chunk_offset += tmp;

				if (h->chunk_offset < h->chunk_size)
					return e;

				memcpy(&big_pkt, h->chunk_buf, sizeof(big_pkt));
				free(h->chunk_buf);
				h->chunk_buf = NULL;

				big_pkt.type = gg_fix32(big_pkt.type);
				h->chunk_size = gg_fix32(big_pkt.dunno1);
				h->chunk_offset = 0;

				if (big_pkt.type == 0x0005)	{ /* XXX */
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() transfer refused\n");
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_REFUSED;
					return e;
				}

				if (h->chunk_size == 0) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() empty chunk, EOF\n");
					e->type = GG_EVENT_DCC_DONE;
					return e;
				}

				h->state = GG_STATE_GETTING_FILE;
				h->check = GG_CHECK_READ;
				h->timeout = GG_DEFAULT_TIMEOUT;
				h->established = 1;

				return e;

			case GG_STATE_READING_VOICE_HEADER:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_VOICE_HEADER\n");

				gg_dcc_read(h->fd, &tiny_pkt, sizeof(tiny_pkt));

				switch (tiny_pkt.type) {
					case 0x03:	/* XXX */
						h->state = GG_STATE_READING_VOICE_SIZE;
						h->check = GG_CHECK_READ;
						h->timeout = GG_DEFAULT_TIMEOUT;
						h->established = 1;
						break;
					case 0x04:	/* XXX */
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() peer breaking connection\n");
						/* XXX zwracać odpowiedni event */
					default:
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() unknown request (%.2x)\n", tiny_pkt.type);
						e->type = GG_EVENT_DCC_ERROR;
						e->event.dcc_error = GG_ERROR_DCC_HANDSHAKE;
				}

				return e;

			case GG_STATE_READING_VOICE_SIZE:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_VOICE_SIZE\n");

				gg_dcc_read(h->fd, &small_pkt, sizeof(small_pkt));

				small_pkt.type = gg_fix32(small_pkt.type);

				if (small_pkt.type < 16 || small_pkt.type > sizeof(buf)) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() invalid voice frame size (%d)\n", small_pkt.type);
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_NET;

					return e;
				}

				h->chunk_size = small_pkt.type;
				h->chunk_offset = 0;

				if (!(h->voice_buf = malloc(h->chunk_size))) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() out of memory for voice frame\n");
					free(e);
					return NULL;
				}

				h->state = GG_STATE_READING_VOICE_DATA;
				h->check = GG_CHECK_READ;
				h->timeout = GG_DEFAULT_TIMEOUT;

				return e;

			case GG_STATE_READING_VOICE_DATA:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_VOICE_DATA\n");

				tmp = recv(h->fd, h->voice_buf + h->chunk_offset, h->chunk_size - h->chunk_offset, 0);
				if (tmp < 1) {
					if (tmp == -1) {
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() recv() failed (errno=%d, %s)\n", errno, strerror(errno));
					} else {
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() recv() failed, connection broken\n");
					}
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_NET;
					return e;
				}

				gg_dcc_debug_data("read", h->fd, h->voice_buf + h->chunk_offset, tmp);

				h->chunk_offset += tmp;

				if (h->chunk_offset >= h->chunk_size) {
					e->type = GG_EVENT_DCC_VOICE_DATA;
					e->event.dcc_voice_data.data = (unsigned char*) h->voice_buf;
					e->event.dcc_voice_data.length = h->chunk_size;
					h->state = GG_STATE_READING_VOICE_HEADER;
					h->voice_buf = NULL;
				}

				h->check = GG_CHECK_READ;
				h->timeout = GG_DEFAULT_TIMEOUT;

				return e;

			case GG_STATE_CONNECTING:
			{
				uin_t uins[2];

				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_CONNECTING\n");

				res = 0;
				if ((foo = getsockopt(h->fd, SOL_SOCKET, SO_ERROR, &res, &res_size)) || res) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() connection failed (fd=%d,errno=%d(%s),foo=%d,res=%d(%s))\n", h->fd, errno, strerror(errno), foo, res, strerror(res));
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_HANDSHAKE;
					return e;
				}

				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() connected, sending uins\n");

				uins[0] = gg_fix32(h->uin);
				uins[1] = gg_fix32(h->peer_uin);

				gg_dcc_write(h->fd, uins, sizeof(uins));

				h->state = GG_STATE_READING_ACK;
				h->check = GG_CHECK_READ;
				h->timeout = GG_DEFAULT_TIMEOUT;

				return e;
			}

			case GG_STATE_READING_ACK:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_ACK\n");

				gg_dcc_read(h->fd, buf, 4);

				if (strncmp(buf, ack, 4)) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() did't get ack\n");

					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_HANDSHAKE;
					return e;
				}

				h->check = GG_CHECK_WRITE;
				h->timeout = GG_DEFAULT_TIMEOUT;
				h->state = GG_STATE_SENDING_REQUEST;

				return e;

			case GG_STATE_SENDING_VOICE_REQUEST:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_SENDING_VOICE_REQUEST\n");

				small_pkt.type = gg_fix32(0x0003);

				gg_dcc_write(h->fd, &small_pkt, sizeof(small_pkt));

				h->state = GG_STATE_READING_VOICE_ACK;
				h->check = GG_CHECK_READ;
				h->timeout = GG_DEFAULT_TIMEOUT;

				return e;

			case GG_STATE_SENDING_REQUEST:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_SENDING_REQUEST\n");

				small_pkt.type = (h->type == GG_SESSION_DCC_GET) ? gg_fix32(0x0003) : gg_fix32(0x0002);	/* XXX */

				gg_dcc_write(h->fd, &small_pkt, sizeof(small_pkt));

				switch (h->type) {
					case GG_SESSION_DCC_GET:
						h->state = GG_STATE_READING_REQUEST;
						h->check = GG_CHECK_READ;
						h->timeout = GG_DEFAULT_TIMEOUT;
						break;

					case GG_SESSION_DCC_SEND:
						h->state = GG_STATE_SENDING_FILE_INFO;
						h->check = GG_CHECK_WRITE;
						h->timeout = GG_DEFAULT_TIMEOUT;

						if (h->file_fd == -1)
							e->type = GG_EVENT_DCC_NEED_FILE_INFO;
						break;

					case GG_SESSION_DCC_VOICE:
						h->state = GG_STATE_SENDING_VOICE_REQUEST;
						h->check = GG_CHECK_WRITE;
						h->timeout = GG_DEFAULT_TIMEOUT;
						break;
				}

				return e;

			case GG_STATE_SENDING_FILE_INFO:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_SENDING_FILE_INFO\n");

				if (h->file_fd == -1) {
					e->type = GG_EVENT_DCC_NEED_FILE_INFO;
					return e;
				}

				small_pkt.type = gg_fix32(0x0001);	/* XXX */

				gg_dcc_write(h->fd, &small_pkt, sizeof(small_pkt));

				file_info_packet.big.type = gg_fix32(0x0003);	/* XXX */
				file_info_packet.big.dunno1 = 0;
				file_info_packet.big.dunno2 = 0;

				memcpy(&file_info_packet.file_info, &h->file_info, sizeof(h->file_info));

				/* zostają teraz u nas, więc odwracamy z powrotem */
				h->file_info.size = gg_fix32(h->file_info.size);
				h->file_info.mode = gg_fix32(h->file_info.mode);

				gg_dcc_write(h->fd, &file_info_packet, sizeof(file_info_packet));

				h->state = GG_STATE_READING_FILE_ACK;
				h->check = GG_CHECK_READ;
				h->timeout = GG_DCC_TIMEOUT_FILE_ACK;

				return e;

			case GG_STATE_READING_FILE_ACK:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_FILE_ACK\n");

				gg_dcc_read(h->fd, &big_pkt, sizeof(big_pkt));

				/* XXX sprawdzać wynik */
				h->offset = gg_fix32(big_pkt.dunno1);

				h->state = GG_STATE_SENDING_FILE_HEADER;
				h->check = GG_CHECK_WRITE;
				h->timeout = GG_DEFAULT_TIMEOUT;

				e->type = GG_EVENT_DCC_ACK;

				return e;

			case GG_STATE_READING_VOICE_ACK:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_READING_VOICE_ACK\n");

				gg_dcc_read(h->fd, &tiny_pkt, sizeof(tiny_pkt));

				if (tiny_pkt.type != 0x01) {
					gg_debug(GG_DEBUG_MISC, "// invalid reply (%.2x), connection refused\n", tiny_pkt.type);
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_REFUSED;
					return e;
				}

				h->state = GG_STATE_READING_VOICE_HEADER;
				h->check = GG_CHECK_READ;
				h->timeout = GG_DEFAULT_TIMEOUT;

				e->type = GG_EVENT_DCC_ACK;

				return e;

			case GG_STATE_SENDING_FILE_HEADER:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_SENDING_FILE_HEADER\n");

				h->chunk_offset = 0;

				if ((h->chunk_size = h->file_info.size - h->offset) > 4096) {
					h->chunk_size = 4096;
					big_pkt.type = gg_fix32(0x0003);  /* XXX */
				} else
					big_pkt.type = gg_fix32(0x0002);  /* XXX */

				big_pkt.dunno1 = gg_fix32(h->chunk_size);
				big_pkt.dunno2 = 0;

				gg_dcc_write(h->fd, &big_pkt, sizeof(big_pkt));

				h->state = GG_STATE_SENDING_FILE;
				h->check = GG_CHECK_WRITE;
				h->timeout = GG_DEFAULT_TIMEOUT;
				h->established = 1;

				return e;

			case GG_STATE_SENDING_FILE:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_SENDING_FILE\n");

				if ((utmp = h->chunk_size - h->chunk_offset) > sizeof(buf))
					utmp = sizeof(buf);

				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() offset=%d, size=%d\n", h->offset, h->file_info.size);

				/* koniec pliku? */
				if (h->file_info.size == 0) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() read() reached eof on empty file\n");
					e->type = GG_EVENT_DCC_DONE;

					return e;
				}

				if (h->offset >= h->file_info.size) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() offset >= size, finished\n");
					e->type = GG_EVENT_DCC_DONE;
					return e;
				}

				lseek(h->file_fd, h->offset, SEEK_SET);

				size = read(h->file_fd, buf, utmp);

				/* błąd */
				if (size == -1) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() read() failed. (errno=%d, %s)\n", errno, strerror(errno));

					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_FILE;

					return e;
				}

				/* koniec pliku? */
				if (size == 0) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() read() reached eof\n");
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_EOF;

					return e;
				}

				/* jeśli wczytaliśmy więcej, utnijmy. */
				if (h->offset + size > h->file_info.size) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() read() too much (read=%d, ofs=%d, size=%d)\n", size, h->offset, h->file_info.size);
					size = h->file_info.size - h->offset;

					if (size < 1) {
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() reached EOF after cutting\n");
						e->type = GG_EVENT_DCC_DONE;
						return e;
					}
				}

				tmp = send(h->fd, buf, size, 0);

				if (tmp == -1) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() send() failed (%s)\n", strerror(errno));
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_NET;
					return e;
				}

				if (tmp == 0) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() send() failed (connection reset)\n");
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_NET;
					return e;
				}

				h->offset += tmp;

				if (h->offset >= h->file_info.size) {
					e->type = GG_EVENT_DCC_DONE;
					return e;
				}

				h->chunk_offset += tmp;

				if (h->chunk_offset >= h->chunk_size) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() chunk finished\n");
					h->state = GG_STATE_SENDING_FILE_HEADER;
					h->timeout = GG_DEFAULT_TIMEOUT;
				} else {
					h->state = GG_STATE_SENDING_FILE;
					h->timeout = GG_DCC_TIMEOUT_SEND;
				}

				h->check = GG_CHECK_WRITE;

				return e;

			case GG_STATE_GETTING_FILE:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_GETTING_FILE\n");

				if ((utmp = h->chunk_size - h->chunk_offset) > sizeof(buf))
					utmp = sizeof(buf);

				if (h->offset >= h->file_info.size) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() offset >= size, finished\n");
					e->type = GG_EVENT_DCC_DONE;
					return e;
				}

				size = recv(h->fd, buf, utmp, 0);

				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() ofs=%d, size=%d, recv()=%d\n", h->offset, h->file_info.size, size);

				/* błąd */
				if (size == -1) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() recv() failed. (errno=%d, %s)\n", errno, strerror(errno));

					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_NET;

					return e;
				}

				/* koniec? */
				if (size == 0) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() recv() reached eof\n");
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_EOF;

					return e;
				}

				tmp = write(h->file_fd, buf, size);

				if (tmp == -1 || tmp < size) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() write() failed (%d:fd=%d:res=%d:%s)\n", tmp, h->file_fd, size, strerror(errno));
					e->type = GG_EVENT_DCC_ERROR;
					e->event.dcc_error = GG_ERROR_DCC_NET;
					return e;
				}

				h->offset += size;

				if (h->offset >= h->file_info.size) {
					e->type = GG_EVENT_DCC_DONE;
					return e;
				}

				h->chunk_offset += size;

				if (h->chunk_offset >= h->chunk_size) {
					gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() chunk finished\n");
					h->state = GG_STATE_READING_FILE_HEADER;
					h->timeout = GG_DEFAULT_TIMEOUT;
					h->chunk_offset = 0;
					h->chunk_size = sizeof(big_pkt);
					if (!(h->chunk_buf = malloc(sizeof(big_pkt)))) {
						gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() out of memory\n");
						free(e);
						return NULL;
					}
				} else {
					h->state = GG_STATE_GETTING_FILE;
					h->timeout = GG_DCC_TIMEOUT_GET;
				}

				h->check = GG_CHECK_READ;

				return e;

			default:
				gg_debug(GG_DEBUG_MISC, "// gg_dcc_watch_fd() GG_STATE_???\n");
				e->type = GG_EVENT_DCC_ERROR;
				e->event.dcc_error = GG_ERROR_DCC_HANDSHAKE;

				return e;
		}
	}

	return e;
}

/**
 * Zwalnia zasoby używane przez połączenie bezpośrednie.
 *
 * \param d Struktura połączenia
 *
 * \ingroup dcc6
 */
void gg_dcc_free(struct gg_dcc *d)
{
	gg_debug(GG_DEBUG_FUNCTION, "** gg_dcc_free(%p);\n", d);

	if (!d)
		return;

	if (d->fd != -1)
		close(d->fd);

	if (d->file_fd != -1)
		gg_file_close(d->file_fd);

	free(d->chunk_buf);
	free(d);
}
Esempio n. 23
0
/**
 * \internal Obsługuje pakiet nowego połączenia bezpośredniego.
 *
 * \param sess Struktura sesji
 * \param e Struktura zdarzenia
 * \param payload Treść pakietu
 * \param len Długość pakietu
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
int gg_dcc7_handle_new(struct gg_session *sess, struct gg_event *e, void *payload, int len)
{
	struct gg_dcc7_new *p = payload;
	struct gg_dcc7 *dcc;

	gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_new(%p, %p, %p, %d)\n", sess, e, payload, len);

	switch (gg_fix32(p->type)) {
		case GG_DCC7_TYPE_FILE:
			if (!(dcc = malloc(sizeof(struct gg_dcc7)))) {
				gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_new() not enough memory\n");
				return -1;
			}
			
			memset(dcc, 0, sizeof(struct gg_dcc7));
			dcc->type = GG_SESSION_DCC7_GET;
			dcc->dcc_type = GG_DCC7_TYPE_FILE;
			dcc->fd = -1;
			dcc->file_fd = -1;
			dcc->uin = sess->uin;
			dcc->peer_uin = gg_fix32(p->uin_from);
			dcc->cid = p->id;
			dcc->sess = sess;

			if (gg_dcc7_session_add(sess, dcc) == -1) {
				gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_new() unable to add to session\n");
				gg_dcc7_free(dcc);
				return -1;
			}

			dcc->size = gg_fix32(p->size);
			strncpy((char*) dcc->filename, (char*) p->filename, GG_DCC7_FILENAME_LEN - 1);
			dcc->filename[GG_DCC7_FILENAME_LEN] = 0;
			memcpy(dcc->hash, p->hash, GG_DCC7_HASH_LEN);

			e->type = GG_EVENT_DCC7_NEW;
			e->event.dcc7_new = dcc;

			break;

		case GG_DCC7_TYPE_VOICE:
			if (!(dcc = malloc(sizeof(struct gg_dcc7)))) {
				gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_packet() not enough memory\n");
				return -1;
			}
			
			memset(dcc, 0, sizeof(struct gg_dcc7));

			dcc->type = GG_SESSION_DCC7_VOICE;
			dcc->dcc_type = GG_DCC7_TYPE_VOICE;
			dcc->fd = -1;
			dcc->file_fd = -1;
			dcc->uin = sess->uin;
			dcc->peer_uin = gg_fix32(p->uin_from);
			dcc->cid = p->id;
			dcc->sess = sess;

			if (gg_dcc7_session_add(sess, dcc) == -1) {
				gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_new() unable to add to session\n");
				gg_dcc7_free(dcc);
				return -1;
			}

			e->type = GG_EVENT_DCC7_NEW;
			e->event.dcc7_new = dcc;

			break;

		default:
			gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_new() unknown dcc type (%d) from %ld\n", gg_fix32(p->type), gg_fix32(p->uin_from));

			break;
	}

	return 0;
}
Esempio n. 24
0
/*
 * \internal Analizuje przychodzący pakiet odpowiedzi i zapisuje wynik
 * w strukturze \c gg_event.
 *
 * \param sess Struktura sesji
 * \param e Struktura zdarzenia
 * \param packet Pakiet odpowiedzi
 * \param length Długość pakietu odpowiedzi
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
int gg_pubdir50_handle_reply_sess(struct gg_session *sess, struct gg_event *e, const char *packet, int length)
{
	const char *end = packet + length, *p;
	struct gg_pubdir50_reply *r = (struct gg_pubdir50_reply*) packet;
	gg_pubdir50_t res;
	int num = 0;
	
	gg_debug(GG_DEBUG_FUNCTION, "** gg_pubdir50_handle_reply_sess(%p, %p, %p, %d);\n", sess, e, packet, length);

	if (!sess || !e || !packet) {
		gg_debug(GG_DEBUG_MISC, "// gg_pubdir50_handle_reply() invalid arguments\n");
		errno = EFAULT;
		return -1;
	}

	if (length < 5) {
		gg_debug(GG_DEBUG_MISC, "// gg_pubdir50_handle_reply() packet too short\n");
		errno = EINVAL;
		return -1;
	}

	if (!(res = gg_pubdir50_new(r->type))) {
		gg_debug(GG_DEBUG_MISC, "// gg_pubdir50_handle_reply() unable to allocate reply\n");
		return -1;
	}

	e->event.pubdir50 = res;

	res->seq = gg_fix32(r->seq);

	switch (res->type) {
		case GG_PUBDIR50_READ:
			e->type = GG_EVENT_PUBDIR50_READ;
			break;

		case GG_PUBDIR50_WRITE:
			e->type = GG_EVENT_PUBDIR50_WRITE;
			break;

		default:
			e->type = GG_EVENT_PUBDIR50_SEARCH_REPLY;
			break;
	}

	/* brak wyników? */
	if (length == 5)
		return 0;

	/* pomiń początek odpowiedzi */
	p = packet + 5;

	while (p < end) {
		const char *field, *value;

		field = p;

		/* sprawdź, czy nie mamy podziału na kolejne pole */
		if (!*field) {
			num++;
			field++;
		}

		value = NULL;
		
		for (p = field; p < end; p++) {
			/* jeśli mamy koniec tekstu... */
			if (!*p) {
				/* ...i jeszcze nie mieliśmy wartości pola to
				 * wiemy, że po tym zerze jest wartość... */
				if (!value)
					value = p + 1;
				else
					/* ...w przeciwym wypadku koniec
					 * wartości i możemy wychodzić
					 * grzecznie z pętli */
					break;
			}
		}
		
		/* sprawdźmy, czy pole nie wychodzi poza pakiet, żeby nie
		 * mieć segfaultów, jeśli serwer przestanie zakańczać pakietów
		 * przez \0 */

		if (p == end) {
			gg_debug(GG_DEBUG_MISC, "// gg_pubdir50_handle_reply() premature end of packet\n");
			goto failure;
		}

		p++;

		/* jeśli dostaliśmy namier na następne wyniki, to znaczy że
		 * mamy koniec wyników i nie jest to kolejna osoba. */
		if (!strcasecmp(field, "nextstart")) {
			res->next = atoi(value);
			num--;
		} else {
			if (sess->encoding == GG_ENCODING_CP1250) {
				if (gg_pubdir50_add_n(res, num, field, value) == -1)
					goto failure;
			} else {
				char *tmp;

				tmp = gg_cp_to_utf8(value);

				if (tmp == NULL)
					goto failure;

				if (gg_pubdir50_add_n(res, num, field, tmp) == -1) {
					free(tmp);
					goto failure;
				}

				free(tmp);
			}
		}
	}	

	res->count = num + 1;
	
	return 0;

failure:
	gg_pubdir50_free(res);
	return -1;
}
Esempio n. 25
0
/**
 * \internal Obsługuje pakiet informacji o połączeniu bezpośrednim.
 *
 * \param sess Struktura sesji
 * \param e Struktura zdarzenia
 * \param payload Treść pakietu
 * \param len Długość pakietu
 *
 * \return 0 jeśli się powiodło, -1 w przypadku błędu
 */
int gg_dcc7_handle_info(struct gg_session *sess, struct gg_event *e, void *payload, int len)
{
	struct gg_dcc7_info *p = payload;
	struct gg_dcc7 *dcc;
	char *tmp;

	gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_info(%p, %p, %p, %d)\n", sess, e, payload, len);
	gg_debug_session(sess, GG_DEBUG_FUNCTION, "// gg_dcc7_handle_info() received address: %s, hash: %s\n", p->info, p->hash);

	if (!(dcc = gg_dcc7_session_find(sess, p->id, gg_fix32(p->uin)))) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unknown dcc session\n");
		return 0;
	}
	
	if (dcc->state == GG_STATE_CONNECTED) {
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() state is already connected\n");
		return 0;
	}

	switch (p->type)
	{
	case GG_DCC7_TYPE_P2P:
		if ((dcc->remote_addr = inet_addr(p->info)) == INADDR_NONE) {
			gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid IP address\n");
			e->type = GG_EVENT_DCC7_ERROR;
			e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
			e->event.dcc7_error_ex.dcc7 = dcc;
			return 0;
		}

		if (!(tmp = strchr(p->info, ' ')) || !(dcc->remote_port = atoi(tmp + 1))) {
			gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid IP port\n");
			e->type = GG_EVENT_DCC7_ERROR;
			e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
			e->event.dcc7_error_ex.dcc7 = dcc;
			return 0;
		}

		if (dcc->state == GG_STATE_WAITING_FOR_INFO) {
			gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() wainting for info so send one\n");
			gg_dcc7_listen_and_send_info(dcc);
			return 0;
		}

		break;

	case GG_DCC7_TYPE_SERVER:
		if (!(tmp = strstr(p->info, "GG"))) {
			gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unknown info packet\n");
			e->type = GG_EVENT_DCC7_ERROR;
			e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
			e->event.dcc7_error_ex.dcc7 = dcc;
			return 0;
		}

#if defined(GG_CONFIG_HAVE_UINT64_T) && defined(GG_CONFIG_HAVE_STRTOULL)
		{
			uint64_t cid;

			cid = strtoull(tmp + 2, NULL, 0);

			gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() info.str=%s, info.id=%llu, sess.id=%llu\n", tmp + 2, cid, *((unsigned long long*) &dcc->cid));

			cid = gg_fix64(cid);

			if (memcmp(&dcc->cid, &cid, sizeof(cid)) != 0) {
				gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid session id\n");
				e->type = GG_EVENT_DCC7_ERROR;
				e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
				e->event.dcc7_error_ex.dcc7 = dcc;
				return 0;
			}
		}
#endif

		if (gg_dcc7_get_relay_addr(dcc) == -1) {
			gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unable to retrieve relay address\n");
			e->type = GG_EVENT_DCC7_ERROR;
			e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
			e->event.dcc7_error_ex.dcc7 = dcc;
			return 0;
		}

		// XXX wysyłać dopiero jeśli uda się połączyć z serwerem?

		gg_send_packet(dcc->sess, GG_DCC7_INFO, payload, len, NULL);

		break;

	default:
		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unhandled transfer type (%d)\n", p->type);
		e->type = GG_EVENT_DCC7_ERROR;
		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
		e->event.dcc7_error_ex.dcc7 = dcc;
		return 0;
	}

	// jeśli nadal czekamy na połączenie przychodzące, a druga strona nie
	// daje rady i oferuje namiary na siebie, bierzemy co dają.

// 	if (dcc->state != GG_STATE_WAITING_FOR_INFO && (dcc->state != GG_STATE_LISTENING || dcc->reverse)) {
// 		gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid state\n");
// 		e->type = GG_EVENT_DCC7_ERROR;
// 		e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
//		e->event.dcc7_error_ex.dcc7 = dcc;
// 		return 0;
// 	}

	if (dcc->state == GG_STATE_LISTENING) {
		gg_sock_close(dcc->fd);
		dcc->fd = -1;
		dcc->reverse = 1;
	}
	
	if (dcc->type == GG_SESSION_DCC7_SEND) {
		e->type = GG_EVENT_DCC7_ACCEPT;
		e->event.dcc7_accept.dcc7 = dcc;
		e->event.dcc7_accept.type = gg_fix32(p->type);
		e->event.dcc7_accept.remote_ip = dcc->remote_addr;
		e->event.dcc7_accept.remote_port = dcc->remote_port;
	} else {
		e->type = GG_EVENT_DCC7_PENDING;
		e->event.dcc7_pending.dcc7 = dcc;
	}

	if (dcc->state == GG_STATE_RESOLVING_RELAY)
		return 0;

	if (gg_dcc7_connect(dcc) == -1) {
		if (gg_dcc7_reverse_connect(dcc) == -1) {
			e->type = GG_EVENT_DCC7_ERROR;
			e->event.dcc7_error = GG_ERROR_DCC7_NET;
			e->event.dcc7_error_ex.dcc7 = dcc;
			return 0;
		}
	}

	return 0;
}