static void test_gg_fix64(void) { const char *source = "\xff\xee\xdd\xcc\xbb\xaa\x99\x88"; uint64_t value; memcpy(&value, source, sizeof(value)); if (gg_fix64(value) != 0x8899aabbccddeeffLL) { fprintf(stderr, "gg_fix64 failed\n"); exit(1); } }
/** * \internal Zamienia znacznik czasu w postaci uniksowej na format API WIN32. * * \note Funkcja działa jedynie gdy kompilator obsługuje typ danych * \c long \c long. * * \param ut Czas w postaci uniksowej * \param ft Czas w postaci API WIN32 */ static void gg_dcc_fill_filetime(uint32_t ut, uint32_t *ft) { uint64_t tmp; tmp = ut; tmp += 11644473600LL; tmp *= 10000000LL; tmp = gg_fix64(tmp); memcpy(ft, &tmp, sizeof(tmp)); }
/** * \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; }