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The modem: - V.42 error correction (LAPM) and V.42bis compression for the games that dial in sync mode, which were forced to async, and V.8bis and 56K (V.90/K56 speeds). - Receive and transmit FIFOs timed by the line's speeds, the TXFNF/TXHF status bits, and Power Smash's symmetric speed. - PPP waits for the game to speak first, on the network thread; this replaces the quarter-second delay on reads. - Its ID reports the country as USA, as upstream's. - Frames short or long, an XID with bad lengths, a REJ for a frame that is gone, a V.8bis message without its end, a V.42bis step-up of a dictionary not a power of two: none can read or write past a buffer, loop for ever or be refused wrongly any more. The Broadband Adapter could not be turned on: settings forced it off and nothing set it. The option "Expansion Port Device (Restart Required)" (reicast_network_device) chooses the modem, the adapter or nothing; the modem by default, as before. The adapter gets its link-change interrupt 10 ms after a reset, as KallistiOS waits for, frames under 6 or over 1514 bytes are dropped, and the network starts with the game's first frame and stops on a GAPS reset. DCNet: "Use DCNet" (reicast_dcnet, off by default) goes online through the dcnet.flyca.st relay instead of picoTCP, on the same network thread, non-blocking, without locks. Power Smash and Pro Yakyuu always go through it, as upstream has them. picoTCP: dns.flyca.st as the name server; a socket that is ready is read whole (an upload no longer stalls); the ports of Daytona, Sega Tetris, Golf Shiyouyo 2, Dee Dee Planet, Driving Strikers, Floigan and the Internet Game Pack. Stopping the network thread no longer waits for it. In the save state (V24), on a Dreamcast: the device chosen and what the modem (FIFOs, V.42, V.42bis, V.8bis) and the adapter (GAPS, its RAM, the RTL8139) hold, 34 KB. A live connection cannot be in a state: one loaded replays what came over the line at the times it came, and a line the state does not have hangs up, without waiting for the thread. tools/threads/pico_test.cpp tests the thread with the new interface, and DCNet against a stand-in relay.
49 lines
2.2 KiB
C
49 lines
2.2 KiB
C
/*
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This file is part of Flycast.
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Flycast is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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Flycast is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Flycast. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "types.h"
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#include "net_platform.h"
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/* The network thread's side of what it shares with the emulation thread
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* (picoppp.cpp): rings that take no lock, one writer and one reader each,
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* and a socket the emulation thread wakes it with. For what runs on that
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* thread: picoTCP, or DCNet. */
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// False once the thread is to stop
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bool netthread_running();
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// To be read before looking for work, and given to netthread_wait()
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int netthread_kicks();
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// The bytes the modem has sent
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size_t netthread_modem_take(u8 *buf, size_t len);
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/* Bytes for the modem: how many there was room for. When there was not
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* room for all, the thread is woken once the modem has read some. */
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size_t netthread_modem_give(const u8 *buf, size_t len);
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// The next frame the adapter has sent, into @frame (NET_ETH_FRAME_MAX bytes): its size, 0 for none
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u32 netthread_eth_take(u8 *frame);
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/* A frame for the adapter. False if there is no room for it: the thread is
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* woken once the adapter has taken some. */
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bool netthread_eth_give(const u8 *frame, u32 size);
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/* Waits for one of the sockets in @readable or @writable, for something
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* from the emulation thread, or for @timeout_ms. @kicks: netthread_kicks()
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* from before the thread last looked for work. */
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void netthread_wait(int kicks, fd_set *readable, fd_set *writable, int max_fd, int timeout_ms);
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// The IPv4 address of @host (network order), 0 if it has none
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u32 netthread_resolve(const char *host);
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// DCNet, in place of the stack (dcnet.cpp)
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void dcnet_run(bool bba);
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