/**
* \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;
}
/**
* \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;
}
/**
* \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;
}
/**
* \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;
}
/**
* \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;
}
