Fixes for the (S)VGA common DAC and some card-specific DAT's (ATi 68860, BT48x family, and the Cirrus Logic DAC), fixes Star Control II among other things.
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OBattler
364
backup code/network/net_pcap - Cópia.c
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364
backup code/network/net_pcap - Cópia.c
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/*
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* VARCem Virtual ARchaeological Computer EMulator.
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* An emulator of (mostly) x86-based PC systems and devices,
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* using the ISA,EISA,VLB,MCA and PCI system buses, roughly
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* spanning the era between 1981 and 1995.
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*
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* This file is part of the VARCem Project.
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*
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* Handle WinPcap library processing.
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*
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* Version: @(#)net_pcap.c 1.0.3 2018/03/15
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*
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* Author: Fred N. van Kempen, <decwiz@yahoo.com>
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*
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* Copyright 2017,2018 Fred N. van Kempen.
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*
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* Redistribution and use in source and binary forms, with
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* or without modification, are permitted provided that the
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* following conditions are met:
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*
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* 1. Redistributions of source code must retain the entire
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* above notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names
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* of its contributors may be used to endorse or promote
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* products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include <pcap/pcap.h>
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#include "../86box.h"
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#include "../config.h"
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#include "../device.h"
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#include "../plat.h"
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#include "../plat_dynld.h"
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#include "network.h"
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static volatile void *pcap_handle; /* handle to WinPcap DLL */
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static volatile pcap_t *pcap; /* handle to WinPcap library */
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static volatile thread_t *poll_tid;
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static const netcard_t *poll_card; /* netcard linked to us */
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static event_t *poll_state;
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/* Pointers to the real functions. */
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static const char *(*f_pcap_lib_version)(void);
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static int (*f_pcap_findalldevs)(pcap_if_t **,char *);
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static void (*f_pcap_freealldevs)(pcap_if_t *);
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static pcap_t *(*f_pcap_open_live)(const char *,int,int,int,char *);
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static int (*f_pcap_compile)(pcap_t *,struct bpf_program *,
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const char *,int,bpf_u_int32);
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static int (*f_pcap_setfilter)(pcap_t *,struct bpf_program *);
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static const u_char *(*f_pcap_next)(pcap_t *,struct pcap_pkthdr *);
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static int (*f_pcap_sendpacket)(pcap_t *,const u_char *,int);
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static void (*f_pcap_close)(pcap_t *);
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static dllimp_t pcap_imports[] = {
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{ "pcap_lib_version", &f_pcap_lib_version },
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{ "pcap_findalldevs", &f_pcap_findalldevs },
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{ "pcap_freealldevs", &f_pcap_freealldevs },
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{ "pcap_open_live", &f_pcap_open_live },
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{ "pcap_compile", &f_pcap_compile },
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{ "pcap_setfilter", &f_pcap_setfilter },
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{ "pcap_next", &f_pcap_next },
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{ "pcap_sendpacket", &f_pcap_sendpacket },
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{ "pcap_close", &f_pcap_close },
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{ NULL, NULL },
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};
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/* Handle the receiving of frames from the channel. */
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static void
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poll_thread(void *arg)
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{
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uint8_t *mac = (uint8_t *)arg;
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uint8_t *data = NULL;
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struct pcap_pkthdr h;
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uint32_t mac_cmp32[2];
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uint16_t mac_cmp16[2];
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event_t *evt;
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pclog("PCAP: polling started.\n");
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thread_set_event(poll_state);
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/* Create a waitable event. */
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evt = thread_create_event();
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/* As long as the channel is open.. */
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while (pcap != NULL) {
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/* Request ownership of the device. */
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network_wait(1);
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/* Wait for a poll request. */
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network_poll();
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if (pcap == NULL) break;
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/* Wait for the next packet to arrive. */
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data = (uint8_t *)f_pcap_next((pcap_t *)pcap, &h);
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if (data != NULL) {
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/* Received MAC. */
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mac_cmp32[0] = *(uint32_t *)(data+6);
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mac_cmp16[0] = *(uint16_t *)(data+10);
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/* Local MAC. */
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mac_cmp32[1] = *(uint32_t *)mac;
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mac_cmp16[1] = *(uint16_t *)(mac+4);
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if ((mac_cmp32[0] != mac_cmp32[1]) ||
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(mac_cmp16[0] != mac_cmp16[1])) {
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poll_card->rx(poll_card->priv, data, h.caplen);
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} else {
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/* Mark as invalid packet. */
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data = NULL;
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}
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}
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/* If we did not get anything, wait a while. */
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if (data == NULL)
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thread_wait_event(evt, 10);
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/* Release ownership of the device. */
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network_wait(0);
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}
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/* No longer needed. */
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if (evt != NULL)
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thread_destroy_event(evt);
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pclog("PCAP: polling stopped.\n");
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thread_set_event(poll_state);
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}
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/*
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* Prepare the (Win)Pcap module for use.
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*
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* This is called only once, during application init,
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* to check for availability of PCAP, and to retrieve
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* a list of (usable) intefaces for it.
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*/
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int
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net_pcap_prepare(netdev_t *list)
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{
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char errbuf[PCAP_ERRBUF_SIZE];
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pcap_if_t *devlist, *dev;
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int i = 0;
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/* Local variables. */
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pcap = NULL;
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/* Try loading the DLL. */
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#ifdef _WIN32
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pcap_handle = dynld_module("wpcap.dll", pcap_imports);
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#else
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pcap_handle = dynld_module("libpcap.so", pcap_imports);
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#endif
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if (pcap_handle == NULL) return(-1);
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/* Retrieve the device list from the local machine */
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if (f_pcap_findalldevs(&devlist, errbuf) == -1) {
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pclog("PCAP: error in pcap_findalldevs: %s\n", errbuf);
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return(-1);
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}
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for (dev=devlist; dev!=NULL; dev=dev->next) {
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strcpy(list->device, dev->name);
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if (dev->description)
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strcpy(list->description, dev->description);
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else
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memset(list->description, '\0', sizeof(list->description));
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list++; i++;
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}
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/* Release the memory. */
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f_pcap_freealldevs(devlist);
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return(i);
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}
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/*
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* Initialize (Win)Pcap for use.
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*
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* This is called on every 'cycle' of the emulator,
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* if and as long the NetworkType is set to PCAP,
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* and also as long as we have a NetCard defined.
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*/
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int
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net_pcap_init(void)
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{
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char errbuf[PCAP_ERRBUF_SIZE];
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char *str;
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/* Did we already load the library? */
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if (pcap_handle == NULL) return(-1);
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#if 0
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// no, we don't..
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/* Load the DLL if needed. We already know it exists. */
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#ifdef _WIN32
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pcap_handle = dynld_module("wpcap.dll", pcap_imports);
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#else
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pcap_handle = dynld_module("libpcap.so", pcap_imports);
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#endif
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if (pcap_handle == NULL) return(-1);
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#endif
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/* Get the PCAP library name and version. */
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strcpy(errbuf, f_pcap_lib_version());
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str = strchr(errbuf, '(');
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if (str != NULL) *(str-1) = '\0';
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pclog("PCAP: initializing, %s\n", errbuf);
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/* Get the value of our capture interface. */
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if ((network_host[0] == '\0') || !strcmp(network_host, "none")) {
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pclog("PCAP: no interface configured!\n");
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return(-1);
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}
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poll_tid = NULL;
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poll_state = NULL;
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poll_card = NULL;
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return(0);
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}
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/* Close up shop. */
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void
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net_pcap_close(void)
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{
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pcap_t *pc;
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if (pcap == NULL) return;
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pclog("PCAP: closing.\n");
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/* Tell the polling thread to shut down. */
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pc = (pcap_t *)pcap; pcap = NULL;
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/* Tell the thread to terminate. */
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if (poll_tid != NULL) {
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network_busy(0);
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/* Wait for the thread to finish. */
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pclog("PCAP: waiting for thread to end...\n");
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thread_wait_event(poll_state, -1);
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pclog("PCAP: thread ended\n");
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thread_destroy_event(poll_state);
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poll_tid = NULL;
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poll_state = NULL;
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poll_card = NULL;
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}
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/* OK, now shut down Pcap itself. */
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f_pcap_close(pc);
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pcap = NULL;
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#if 0
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// no, we don't..
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/* Unload the DLL if possible. */
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if (pcap_handle != NULL) {
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dynld_close((void *)pcap_handle);
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pcap_handle = NULL;
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}
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#endif
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}
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/*
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* Reset (Win)Pcap and activate it.
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*
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* This is called on every 'cycle' of the emulator,
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* if and as long the NetworkType is set to PCAP,
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* and also as long as we have a NetCard defined.
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*
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* We already know we have PCAP available, as this
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* is called when the network activates itself and
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* tries to attach to the network module.
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*/
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int
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net_pcap_reset(const netcard_t *card, uint8_t *mac)
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{
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char errbuf[PCAP_ERRBUF_SIZE];
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char filter_exp[255];
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struct bpf_program fp;
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/* Open a PCAP live channel. */
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if ((pcap = f_pcap_open_live(network_host, /* interface name */
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1518, /* max packet size */
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1, /* promiscuous mode? */
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10, /* timeout in msec */
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errbuf)) == NULL) { /* error buffer */
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pclog(" Unable to open device: %s!\n", network_host);
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return(-1);
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}
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pclog("PCAP: interface: %s\n", network_host);
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/* Create a MAC address based packet filter. */
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pclog("PCAP: installing filter for MAC=%02x:%02x:%02x:%02x:%02x:%02x\n",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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sprintf(filter_exp,
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"( ((ether dst ff:ff:ff:ff:ff:ff) or (ether dst %02x:%02x:%02x:%02x:%02x:%02x)) and not (ether src %02x:%02x:%02x:%02x:%02x:%02x) )",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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if (f_pcap_compile((pcap_t *)pcap, &fp, filter_exp, 0, 0xffffffff) != -1) {
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if (f_pcap_setfilter((pcap_t *)pcap, &fp) != 0) {
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pclog("PCAP: error installing filter (%s) !\n", filter_exp);
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f_pcap_close((pcap_t *)pcap);
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return(-1);
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}
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} else {
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pclog("PCAP: could not compile filter (%s) !\n", filter_exp);
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f_pcap_close((pcap_t *)pcap);
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return(-1);
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}
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/* Save the callback info. */
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poll_card = card;
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pclog("PCAP: starting thread..\n");
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poll_state = thread_create_event();
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poll_tid = thread_create(poll_thread, mac);
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thread_wait_event(poll_state, -1);
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return(0);
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}
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/* Send a packet to the Pcap interface. */
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void
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net_pcap_in(uint8_t *bufp, int len)
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{
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if (pcap == NULL) return;
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network_busy(1);
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f_pcap_sendpacket((pcap_t *)pcap, bufp, len);
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network_busy(0);
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}
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