2 * This file is part of DOS-libpcap
3 * Ported to DOS/DOSX by G. Vanem <gvanem@yahoo.no>
5 * pcap-dos.c: Interface to PKTDRVR, NDIS2 and 32-bit pmode
15 #include <limits.h> /* for INT_MAX */
18 #if defined(USE_32BIT_DRIVERS)
19 #include "msdos/pm_drvr/pmdrvr.h"
20 #include "msdos/pm_drvr/pci.h"
21 #include "msdos/pm_drvr/bios32.h"
22 #include "msdos/pm_drvr/module.h"
23 #include "msdos/pm_drvr/3c501.h"
24 #include "msdos/pm_drvr/3c503.h"
25 #include "msdos/pm_drvr/3c509.h"
26 #include "msdos/pm_drvr/3c59x.h"
27 #include "msdos/pm_drvr/3c515.h"
28 #include "msdos/pm_drvr/3c90x.h"
29 #include "msdos/pm_drvr/3c575_cb.h"
30 #include "msdos/pm_drvr/ne.h"
31 #include "msdos/pm_drvr/wd.h"
32 #include "msdos/pm_drvr/accton.h"
33 #include "msdos/pm_drvr/cs89x0.h"
34 #include "msdos/pm_drvr/rtl8139.h"
35 #include "msdos/pm_drvr/ne2k-pci.h"
41 #include "msdos/pktdrvr.h"
44 #include "msdos/ndis2.h"
47 #include <arpa/inet.h>
49 #include <net/if_arp.h>
50 #include <net/if_ether.h>
51 #include <net/if_packe.h>
54 #if defined(USE_32BIT_DRIVERS)
55 #define FLUSHK() do { _printk_safe = 1; _printk_flush(); } while (0)
56 #define NDIS_NEXT_DEV &rtl8139_dev
58 static char *rx_pool = NULL;
59 static void init_32bit (void);
61 static int pktq_init (struct rx_ringbuf *q, int size, int num, char *pool);
62 static int pktq_check (struct rx_ringbuf *q);
63 static int pktq_inc_out (struct rx_ringbuf *q);
64 static int pktq_in_index (struct rx_ringbuf *q) LOCKED_FUNC;
65 static void pktq_clear (struct rx_ringbuf *q) LOCKED_FUNC;
67 static struct rx_elem *pktq_in_elem (struct rx_ringbuf *q) LOCKED_FUNC;
68 static struct rx_elem *pktq_out_elem (struct rx_ringbuf *q);
71 #define FLUSHK() ((void)0)
72 #define NDIS_NEXT_DEV NULL
76 * Internal variables/functions in Watt-32
78 extern WORD _pktdevclass;
79 extern BOOL _eth_is_init;
80 extern int _w32_dynamic_host;
81 extern int _watt_do_exit;
82 extern int _watt_is_init;
83 extern int _w32__bootp_on, _w32__dhcp_on, _w32__rarp_on, _w32__do_mask_req;
84 extern void (*_w32_usr_post_init) (void);
85 extern void (*_w32_print_hook)();
87 extern void dbug_write (const char *); /* Watt-32 lib, pcdbug.c */
88 extern int pkt_get_mtu (void);
90 static int ref_count = 0;
92 static u_long mac_count = 0;
93 static u_long filter_count = 0;
95 static volatile BOOL exc_occured = 0;
97 static struct device *handle_to_device [20];
99 static int pcap_activate_dos (pcap_t *p);
100 static int pcap_read_dos (pcap_t *p, int cnt, pcap_handler callback,
102 static void pcap_cleanup_dos (pcap_t *p);
103 static int pcap_stats_dos (pcap_t *p, struct pcap_stat *ps);
104 static int pcap_sendpacket_dos (pcap_t *p, const void *buf, size_t len);
105 static int pcap_setfilter_dos (pcap_t *p, struct bpf_program *fp);
107 static int ndis_probe (struct device *dev);
108 static int pkt_probe (struct device *dev);
110 static void close_driver (void);
111 static int init_watt32 (struct pcap *pcap, const char *dev_name, char *err_buf);
112 static int first_init (const char *name, char *ebuf, int promisc);
114 static void watt32_recv_hook (u_char *dummy, const struct pcap_pkthdr *pcap,
118 * These are the device we always support
120 static struct device ndis_dev = {
125 NDIS_NEXT_DEV, /* NULL or a 32-bit device */
129 static struct device pkt_dev = {
138 static struct device *get_device (int fd)
140 if (fd <= 0 || fd >= sizeof(handle_to_device)/sizeof(handle_to_device[0]))
142 return handle_to_device [fd-1];
146 * Private data for capturing on MS-DOS.
149 void (*wait_proc)(void); /* call proc while waiting */
150 struct pcap_stat stat;
153 pcap_t *pcap_create_interface (const char *device _U_, char *ebuf)
157 p = PCAP_CREATE_COMMON(ebuf, struct pcap_dos);
161 p->activate_op = pcap_activate_dos;
166 * Open MAC-driver with name 'device_name' for live capture of
169 static int pcap_activate_dos (pcap_t *pcap)
171 if (pcap->opt.rfmon) {
173 * No monitor mode on DOS.
175 return (PCAP_ERROR_RFMON_NOTSUP);
179 * Turn a negative snapshot value (invalid), a snapshot value of
180 * 0 (unspecified), or a value bigger than the normal maximum
181 * value, into the maximum allowed value.
183 * If some application really *needs* a bigger snapshot
184 * length, we should just increase MAXIMUM_SNAPLEN.
186 if (pcap->snapshot <= 0 || pcap->snapshot > MAXIMUM_SNAPLEN)
187 pcap->snapshot = MAXIMUM_SNAPLEN;
189 if (pcap->snapshot < ETH_MIN+8)
190 pcap->snapshot = ETH_MIN+8;
192 if (pcap->snapshot > ETH_MAX) /* silently accept and truncate large MTUs */
193 pcap->snapshot = ETH_MAX;
195 pcap->linktype = DLT_EN10MB; /* !! */
196 pcap->cleanup_op = pcap_cleanup_dos;
197 pcap->read_op = pcap_read_dos;
198 pcap->stats_op = pcap_stats_dos;
199 pcap->inject_op = pcap_sendpacket_dos;
200 pcap->setfilter_op = pcap_setfilter_dos;
201 pcap->setdirection_op = NULL; /* Not implemented.*/
202 pcap->fd = ++ref_count;
204 pcap->bufsize = ETH_MAX+100; /* add some margin */
205 pcap->buffer = calloc (pcap->bufsize, 1);
207 if (pcap->fd == 1) /* first time we're called */
209 if (!init_watt32(pcap, pcap->opt.device, pcap->errbuf) ||
210 !first_init(pcap->opt.device, pcap->errbuf, pcap->opt.promisc))
212 /* XXX - free pcap->buffer? */
215 atexit (close_driver);
217 else if (stricmp(active_dev->name,pcap->opt.device))
219 snprintf (pcap->errbuf, PCAP_ERRBUF_SIZE,
220 "Cannot use different devices simultaneously "
221 "(`%s' vs. `%s')", active_dev->name, pcap->opt.device);
222 /* XXX - free pcap->buffer? */
225 handle_to_device [pcap->fd-1] = active_dev;
230 * Poll the receiver queue and call the pcap callback-handler
234 pcap_read_one (pcap_t *p, pcap_handler callback, u_char *data)
236 struct pcap_dos *pd = p->priv;
237 struct pcap_pkthdr pcap;
238 struct timeval now, expiry = { 0,0 };
241 if (p->opt.timeout > 0)
243 gettimeofday2 (&now, NULL);
244 expiry.tv_usec = now.tv_usec + 1000UL * p->opt.timeout;
245 expiry.tv_sec = now.tv_sec;
246 while (expiry.tv_usec >= 1000000L)
248 expiry.tv_usec -= 1000000L;
255 volatile struct device *dev; /* might be reset by sig_handler */
257 dev = get_device (p->fd);
261 PCAP_ASSERT (dev->copy_rx_buf || dev->peek_rx_buf);
264 /* If driver has a zero-copy receive facility, peek at the queue,
265 * filter it, do the callback and release the buffer.
267 if (dev->peek_rx_buf)
269 PCAP_ASSERT (dev->release_rx_buf);
270 rx_len = (*dev->peek_rx_buf) (&p->buffer);
274 rx_len = (*dev->copy_rx_buf) (p->buffer, p->snapshot);
277 if (rx_len > 0) /* got a packet */
283 pcap.caplen = min (rx_len, p->snapshot);
287 (!p->fcode.bf_insns || pcap_filter(p->fcode.bf_insns, p->buffer, pcap.len, pcap.caplen)))
291 /* Fix-me!! Should be time of arrival. Not time of
294 gettimeofday2 (&pcap.ts, NULL);
295 (*callback) (data, &pcap, p->buffer);
298 if (dev->release_rx_buf)
299 (*dev->release_rx_buf) (p->buffer);
301 if (pcap_pkt_debug > 0)
303 if (callback == watt32_recv_hook)
304 dbug_write ("pcap_recv_hook\n");
305 else dbug_write ("pcap_read_op\n");
311 /* Has "pcap_breakloop()" been called?
315 * Yes - clear the flag that indicates that it
316 * has, and return -2 to indicate that we were
317 * told to break out of the loop.
323 /* If not to wait for a packet or pcap_cleanup_dos() called from
324 * e.g. SIGINT handler, exit loop now.
326 if (p->opt.timeout <= 0 || (volatile int)p->fd <= 0)
329 gettimeofday2 (&now, NULL);
331 if (timercmp(&now, &expiry, >))
335 kbhit(); /* a real CPU hog */
339 (*pd->wait_proc)(); /* call yield func */
342 if (rx_len < 0) /* receive error */
345 #ifdef USE_32BIT_DRIVERS
346 if (pcap_pkt_debug > 1)
347 printk ("pkt-err %s\n", pktInfo.error);
355 pcap_read_dos (pcap_t *p, int cnt, pcap_handler callback, u_char *data)
360 * This can conceivably process more than INT_MAX packets,
361 * which would overflow the packet count, causing it either
362 * to look like a negative number, and thus cause us to
363 * return a value that looks like an error, or overflow
364 * back into positive territory, and thus cause us to
365 * return a too-low count.
367 * Therefore, if the packet count is unlimited, we clip
368 * it at INT_MAX; this routine is not expected to
369 * process packets indefinitely, so that's not an issue.
371 if (PACKET_COUNT_IS_UNLIMITED(cnt))
378 rc = pcap_read_one (p, callback, data);
383 _w32_os_yield(); /* allow SIGINT generation, yield to Win95/NT */
389 * Return network statistics
391 static int pcap_stats_dos (pcap_t *p, struct pcap_stat *ps)
393 struct net_device_stats *stats;
395 struct device *dev = p ? get_device(p->fd) : NULL;
399 strcpy (p->errbuf, "illegal pcap handle");
403 if (!dev->get_stats || (stats = (*dev->get_stats)(dev)) == NULL)
405 strcpy (p->errbuf, "device statistics not available");
412 pd->stat.ps_recv = stats->rx_packets;
413 pd->stat.ps_drop += stats->rx_missed_errors;
414 pd->stat.ps_ifdrop = stats->rx_dropped + /* queue full */
415 stats->rx_errors; /* HW errors */
423 * Return detailed network/device statistics.
424 * May be called after 'dev->close' is called.
426 int pcap_stats_ex (pcap_t *p, struct pcap_stat_ex *se)
428 struct device *dev = p ? get_device (p->fd) : NULL;
430 if (!dev || !dev->get_stats)
432 pcap_strlcpy (p->errbuf, "detailed device statistics not available",
437 if (!strnicmp(dev->name,"pkt",3))
439 pcap_strlcpy (p->errbuf, "pktdrvr doesn't have detailed statistics",
443 memcpy (se, (*dev->get_stats)(dev), sizeof(*se));
448 * Simply store the filter-code for the pcap_read_dos() callback
449 * Some day the filter-code could be handed down to the active
450 * device (pkt_rx1.s or 32-bit device interrupt handler).
452 static int pcap_setfilter_dos (pcap_t *p, struct bpf_program *fp)
461 * Return # of packets received in pcap_read_dos()
463 u_long pcap_mac_packets (void)
469 * Return # of packets passed through filter in pcap_read_dos()
471 u_long pcap_filter_packets (void)
473 return (filter_count);
477 * Close pcap device. Not called for offline captures.
479 static void pcap_cleanup_dos (pcap_t *p)
486 if (pcap_stats(p,NULL) < 0)
487 pd->stat.ps_drop = 0;
488 if (!get_device(p->fd))
491 handle_to_device [p->fd-1] = NULL;
499 /* XXX - call pcap_cleanup_live_common? */
503 * Return the name of the 1st network interface,
504 * or NULL if none can be found.
506 char *pcap_lookupdev (char *ebuf)
510 #ifdef USE_32BIT_DRIVERS
514 for (dev = (struct device*)dev_base; dev; dev = dev->next)
516 PCAP_ASSERT (dev->probe);
518 if ((*dev->probe)(dev))
521 probed_dev = (struct device*) dev; /* remember last probed device */
522 return (char*) dev->name;
527 strcpy (ebuf, "No driver found");
532 * Gets localnet & netmask from Watt-32.
534 int pcap_lookupnet (const char *device, bpf_u_int32 *localnet,
535 bpf_u_int32 *netmask, char *errbuf)
541 strcpy (errbuf, "pcap_open_offline() or pcap_activate() must be "
546 mask = _w32_sin_mask;
547 net = my_ip_addr & mask;
550 if (IN_CLASSA(*netmask))
552 else if (IN_CLASSB(*netmask))
554 else if (IN_CLASSC(*netmask))
558 snprintf (errbuf, PCAP_ERRBUF_SIZE, "inet class for 0x%lx unknown", mask);
562 *localnet = htonl (net);
563 *netmask = htonl (mask);
570 * Get a list of all interfaces that are present and that we probe okay.
571 * Returns -1 on error, 0 otherwise.
572 * The list may be NULL empty if no interfaces were up and could be opened.
574 int pcap_platform_finddevs (pcap_if_list_t *devlistp, char *errbuf)
578 #if 0 /* Pkt drivers should have no addresses */
579 struct sockaddr_in sa_ll_1, sa_ll_2;
580 struct sockaddr *addr, *netmask, *broadaddr, *dstaddr;
585 for (dev = (struct device*)dev_base; dev; dev = dev->next)
587 PCAP_ASSERT (dev->probe);
589 if (!(*dev->probe)(dev))
592 PCAP_ASSERT (dev->close); /* set by probe routine */
597 * XXX - find out whether it's up or running? Does that apply here?
598 * Can we find out if anything's plugged into the adapter, if it's
599 * a wired device, and set PCAP_IF_CONNECTION_STATUS_CONNECTED
600 * or PCAP_IF_CONNECTION_STATUS_DISCONNECTED?
602 if ((curdev = add_dev(devlistp, dev->name, 0,
603 dev->long_name, errbuf)) == NULL)
609 #if 0 /* Pkt drivers should have no addresses */
610 memset (&sa_ll_1, 0, sizeof(sa_ll_1));
611 memset (&sa_ll_2, 0, sizeof(sa_ll_2));
612 sa_ll_1.sin_family = AF_INET;
613 sa_ll_2.sin_family = AF_INET;
615 addr = (struct sockaddr*) &sa_ll_1;
616 netmask = (struct sockaddr*) &sa_ll_1;
617 dstaddr = (struct sockaddr*) &sa_ll_1;
618 broadaddr = (struct sockaddr*) &sa_ll_2;
619 memset (&sa_ll_2.sin_addr, 0xFF, sizeof(sa_ll_2.sin_addr));
621 if (add_addr_to_dev(curdev, addr, sizeof(*addr),
622 netmask, sizeof(*netmask),
623 broadaddr, sizeof(*broadaddr),
624 dstaddr, sizeof(*dstaddr), errbuf) < 0)
632 if (ret == 0 && !found)
633 strcpy (errbuf, "No drivers found");
639 * pcap_assert() is mainly used for debugging
641 void pcap_assert (const char *what, const char *file, unsigned line)
644 fprintf (stderr, "%s (%u): Assertion \"%s\" failed\n",
651 * For pcap_offline_read(): wait and yield between printing packets
652 * to simulate the pace packets where actually recorded.
654 void pcap_set_wait (pcap_t *p, void (*yield)(void), int wait)
658 struct pcap_dos *pd = p->priv;
660 pd->wait_proc = yield;
661 p->opt.timeout = wait;
666 * Initialise a named network device.
668 static struct device *
669 open_driver (const char *dev_name, char *ebuf, int promisc)
673 for (dev = (struct device*)dev_base; dev; dev = dev->next)
675 PCAP_ASSERT (dev->name);
677 if (strcmp (dev_name,dev->name))
680 if (!probed_dev) /* user didn't call pcap_lookupdev() first */
682 PCAP_ASSERT (dev->probe);
684 if (!(*dev->probe)(dev)) /* call the xx_probe() function */
686 snprintf (ebuf, PCAP_ERRBUF_SIZE, "failed to detect device `%s'", dev_name);
689 probed_dev = dev; /* device is probed okay and may be used */
691 else if (dev != probed_dev)
698 /* Select what traffic to receive
701 dev->flags |= (IFF_ALLMULTI | IFF_PROMISC);
702 else dev->flags &= ~(IFF_ALLMULTI | IFF_PROMISC);
704 PCAP_ASSERT (dev->open);
706 if (!(*dev->open)(dev))
708 snprintf (ebuf, PCAP_ERRBUF_SIZE, "failed to activate device `%s'", dev_name);
709 if (pktInfo.error && !strncmp(dev->name,"pkt",3))
712 strcat (ebuf, pktInfo.error);
717 /* Some devices need this to operate in promiscuous mode
719 if (promisc && dev->set_multicast_list)
720 (*dev->set_multicast_list) (dev);
722 active_dev = dev; /* remember our active device */
726 /* 'dev_name' not matched in 'dev_base' list.
730 snprintf (ebuf, PCAP_ERRBUF_SIZE, "device `%s' not supported", dev_name);
737 snprintf (ebuf, PCAP_ERRBUF_SIZE, "device `%s' not probed", dev_name);
744 * Deinitialise MAC driver.
745 * Set receive mode back to default mode.
747 static void close_driver (void)
749 /* !!todo: loop over all 'handle_to_device[]' ? */
750 struct device *dev = active_dev;
752 if (dev && dev->close)
760 #ifdef USE_32BIT_DRIVERS
773 static void setup_signals (void (*handler)(int))
775 signal (SIGSEGV,handler);
776 signal (SIGILL, handler);
777 signal (SIGFPE, handler);
780 static void exc_handler (int sig)
782 #ifdef USE_32BIT_DRIVERS
783 if (active_dev->irq > 0) /* excludes IRQ 0 */
785 disable_irq (active_dev->irq);
786 irq_eoi_cmd (active_dev->irq);
794 fputs ("Catching SIGSEGV.\n", stderr);
797 fputs ("Catching SIGILL.\n", stderr);
801 fputs ("Catching SIGFPE.\n", stderr);
804 fprintf (stderr, "Catching signal %d.\n", sig);
809 #endif /* __DJGPP__ */
813 * Open the pcap device for the first client calling pcap_activate()
815 static int first_init (const char *name, char *ebuf, int promisc)
819 #ifdef USE_32BIT_DRIVERS
820 rx_pool = k_calloc (RECEIVE_BUF_SIZE, RECEIVE_QUEUE_SIZE);
823 strcpy (ebuf, "Not enough memory (Rx pool)");
829 setup_signals (exc_handler);
832 #ifdef USE_32BIT_DRIVERS
836 dev = open_driver (name, ebuf, promisc);
839 #ifdef USE_32BIT_DRIVERS
845 setup_signals (SIG_DFL);
850 #ifdef USE_32BIT_DRIVERS
852 * If driver is NOT a 16-bit "pkt/ndis" driver (having a 'copy_rx_buf'
853 * set in it's probe handler), initialise near-memory ring-buffer for
856 if (dev->copy_rx_buf == NULL)
858 dev->get_rx_buf = get_rxbuf;
859 dev->peek_rx_buf = peek_rxbuf;
860 dev->release_rx_buf = release_rxbuf;
861 pktq_init (&dev->queue, RECEIVE_BUF_SIZE, RECEIVE_QUEUE_SIZE, rx_pool);
867 #ifdef USE_32BIT_DRIVERS
868 static void init_32bit (void)
870 static int init_pci = 0;
873 _printk_init (64*1024, NULL); /* calls atexit(printk_exit) */
876 (void)pci_init(); /* init BIOS32+PCI interface */
883 * Hook functions for using Watt-32 together with pcap
885 static char rxbuf [ETH_MAX+100]; /* rx-buffer with some margin */
887 static pcap_t pcap_save;
889 static void watt32_recv_hook (u_char *dummy, const struct pcap_pkthdr *pcap,
892 /* Fix me: assumes Ethernet II only */
893 struct ether_header *ep = (struct ether_header*) buf;
895 memcpy (rxbuf, buf, pcap->caplen);
896 etype = ep->ether_type;
900 #if (WATTCP_VER >= 0x0224)
902 * This function is used by Watt-32 to poll for a packet.
903 * i.e. it's set to bypass _eth_arrived()
905 static void *pcap_recv_hook (WORD *type)
907 int len = pcap_read_dos (&pcap_save, 1, watt32_recv_hook, NULL);
913 return (void*) &rxbuf;
917 * This function is called by Watt-32 (via _eth_xmit_hook).
918 * If dbug_init() was called, we should trace packets sent.
920 static int pcap_xmit_hook (const void *buf, unsigned len)
924 if (pcap_pkt_debug > 0)
925 dbug_write ("pcap_xmit_hook: ");
927 if (active_dev && active_dev->xmit)
928 if ((*active_dev->xmit) (active_dev, buf, len) > 0)
931 if (pcap_pkt_debug > 0)
932 dbug_write (rc ? "ok\n" : "fail\n");
937 static int pcap_sendpacket_dos (pcap_t *p, const void *buf, size_t len)
939 struct device *dev = p ? get_device(p->fd) : NULL;
941 if (!dev || !dev->xmit)
943 return (*dev->xmit) (dev, buf, len);
947 * This function is called by Watt-32 in tcp_post_init().
948 * We should prevent Watt-32 from using BOOTP/DHCP/RARP etc.
950 static void (*prev_post_hook) (void);
952 static void pcap_init_hook (void)
954 _w32__bootp_on = _w32__dhcp_on = _w32__rarp_on = 0;
955 _w32__do_mask_req = 0;
956 _w32_dynamic_host = 0;
962 * Suppress PRINT message from Watt-32's sock_init()
964 static void null_print (void) {}
967 * To use features of Watt-32 (netdb functions and socket etc.)
968 * we must call sock_init(). But we set various hooks to prevent
969 * using normal PKTDRVR functions in pcpkt.c. This should hopefully
970 * make Watt-32 and pcap co-operate.
972 static int init_watt32 (struct pcap *pcap, const char *dev_name, char *err_buf)
975 int rc, MTU, has_ip_addr;
976 int using_pktdrv = 1;
978 /* If user called sock_init() first, we need to reinit in
979 * order to open debug/trace-file properly
984 env = getenv ("PCAP_TRACE");
985 if (env && atoi(env) > 0 &&
986 pcap_pkt_debug < 0) /* if not already set */
989 pcap_pkt_debug = atoi (env);
992 _watt_do_exit = 0; /* prevent sock_init() calling exit() */
993 prev_post_hook = _w32_usr_post_init;
994 _w32_usr_post_init = pcap_init_hook;
995 _w32_print_hook = null_print;
997 if (dev_name && strncmp(dev_name,"pkt",3))
998 using_pktdrv = FALSE;
1001 has_ip_addr = (rc != 8); /* IP-address assignment failed */
1003 /* if pcap is using a 32-bit driver w/o a pktdrvr loaded, we
1004 * just pretend Watt-32 is initialised okay.
1006 * !! fix-me: The Watt-32 config isn't done if no pktdrvr
1007 * was found. In that case my_ip_addr + sin_mask
1008 * have default values. Should be taken from another
1009 * ini-file/environment in any case (ref. tcpdump.ini)
1013 if (!using_pktdrv || !has_ip_addr) /* for now .... */
1015 static const char myip[] = "192.168.0.1";
1016 static const char mask[] = "255.255.255.0";
1018 printf ("Just guessing, using IP %s and netmask %s\n", myip, mask);
1019 my_ip_addr = aton (myip);
1020 _w32_sin_mask = aton (mask);
1022 else if (rc && using_pktdrv)
1024 snprintf (err_buf, PCAP_ERRBUF_SIZE, "sock_init() failed, code %d", rc);
1028 /* Set recv-hook for peeking in _eth_arrived().
1030 #if (WATTCP_VER >= 0x0224)
1031 _eth_recv_hook = pcap_recv_hook;
1032 _eth_xmit_hook = pcap_xmit_hook;
1035 /* Free the pkt-drvr handle allocated in pkt_init().
1036 * The above hooks should thus use the handle reopened in open_driver()
1041 /* _eth_is_init = 1; */ /* hack to get Rx/Tx-hooks in Watt-32 working */
1044 memcpy (&pcap_save, pcap, sizeof(pcap_save));
1045 MTU = pkt_get_mtu();
1046 pcap_save.fcode.bf_insns = NULL;
1047 pcap_save.linktype = _eth_get_hwtype (NULL, NULL);
1048 pcap_save.snapshot = MTU > 0 ? MTU : ETH_MAX; /* assume 1514 */
1050 /* prevent use of resolve() and resolve_ip()
1052 last_nameserver = 0;
1056 int EISA_bus = 0; /* Where is natural place for this? */
1059 * Application config hooks to set various driver parameters.
1062 static const struct config_table debug_tab[] = {
1063 { "PKT.DEBUG", ARG_ATOI, &pcap_pkt_debug },
1064 { "PKT.VECTOR", ARG_ATOX_W, NULL },
1065 { "NDIS.DEBUG", ARG_ATOI, NULL },
1066 #ifdef USE_32BIT_DRIVERS
1067 { "3C503.DEBUG", ARG_ATOI, &ei_debug },
1068 { "3C503.IO_BASE", ARG_ATOX_W, &el2_dev.base_addr },
1069 { "3C503.MEMORY", ARG_ATOX_W, &el2_dev.mem_start },
1070 { "3C503.IRQ", ARG_ATOI, &el2_dev.irq },
1071 { "3C505.DEBUG", ARG_ATOI, NULL },
1072 { "3C505.BASE", ARG_ATOX_W, NULL },
1073 { "3C507.DEBUG", ARG_ATOI, NULL },
1074 { "3C509.DEBUG", ARG_ATOI, &el3_debug },
1075 { "3C509.ILOOP", ARG_ATOI, &el3_max_loop },
1076 { "3C529.DEBUG", ARG_ATOI, NULL },
1077 { "3C575.DEBUG", ARG_ATOI, &debug_3c575 },
1078 { "3C59X.DEBUG", ARG_ATOI, &vortex_debug },
1079 { "3C59X.IFACE0", ARG_ATOI, &vortex_options[0] },
1080 { "3C59X.IFACE1", ARG_ATOI, &vortex_options[1] },
1081 { "3C59X.IFACE2", ARG_ATOI, &vortex_options[2] },
1082 { "3C59X.IFACE3", ARG_ATOI, &vortex_options[3] },
1083 { "3C90X.DEBUG", ARG_ATOX_W, &tc90xbc_debug },
1084 { "ACCT.DEBUG", ARG_ATOI, ðpk_debug },
1085 { "CS89.DEBUG", ARG_ATOI, &cs89_debug },
1086 { "RTL8139.DEBUG", ARG_ATOI, &rtl8139_debug },
1087 /* { "RTL8139.FDUPLEX", ARG_ATOI, &rtl8139_options }, */
1088 { "SMC.DEBUG", ARG_ATOI, &ei_debug },
1089 /* { "E100.DEBUG", ARG_ATOI, &e100_debug }, */
1090 { "PCI.DEBUG", ARG_ATOI, &pci_debug },
1091 { "BIOS32.DEBUG", ARG_ATOI, &bios32_debug },
1092 { "IRQ.DEBUG", ARG_ATOI, &irq_debug },
1093 { "TIMER.IRQ", ARG_ATOI, &timer_irq },
1099 * pcap_config_hook() is an extension to application's config
1100 * handling. Uses Watt-32's config-table function.
1102 int pcap_config_hook (const char *keyword, const char *value)
1104 return parse_config_table (debug_tab, NULL, keyword, value);
1108 * Linked list of supported devices
1110 struct device *active_dev = NULL; /* the device we have opened */
1111 struct device *probed_dev = NULL; /* the device we have probed */
1112 const struct device *dev_base = &pkt_dev; /* list of network devices */
1115 * PKTDRVR device functions
1117 int pcap_pkt_debug = -1;
1119 static void pkt_close (struct device *dev)
1121 BOOL okay = PktExitDriver();
1123 if (pcap_pkt_debug > 1)
1124 fprintf (stderr, "pkt_close(): %d\n", okay);
1131 static int pkt_open (struct device *dev)
1135 if (dev->flags & IFF_PROMISC)
1136 mode = PDRX_ALL_PACKETS;
1137 else mode = PDRX_BROADCAST;
1139 if (!PktInitDriver(mode))
1142 PktResetStatistics (pktInfo.handle);
1143 PktQueueBusy (FALSE);
1147 static int pkt_xmit (struct device *dev, const void *buf, int len)
1149 struct net_device_stats *stats = (struct net_device_stats*) dev->priv;
1151 if (pcap_pkt_debug > 0)
1152 dbug_write ("pcap_xmit\n");
1154 if (!PktTransmit(buf,len))
1162 static void *pkt_stats (struct device *dev)
1164 struct net_device_stats *stats = (struct net_device_stats*) dev->priv;
1166 if (!stats || !PktSessStatistics(pktInfo.handle))
1169 stats->rx_packets = pktStat.inPackets;
1170 stats->rx_errors = pktStat.lost;
1171 stats->rx_missed_errors = PktRxDropped();
1175 static int pkt_probe (struct device *dev)
1177 if (!PktSearchDriver())
1180 dev->open = pkt_open;
1181 dev->xmit = pkt_xmit;
1182 dev->close = pkt_close;
1183 dev->get_stats = pkt_stats;
1184 dev->copy_rx_buf = PktReceive; /* farmem peek and copy routine */
1185 dev->get_rx_buf = NULL;
1186 dev->peek_rx_buf = NULL;
1187 dev->release_rx_buf = NULL;
1188 dev->priv = calloc (sizeof(struct net_device_stats), 1);
1195 * NDIS device functions
1197 static void ndis_close (struct device *dev)
1205 static int ndis_open (struct device *dev)
1207 int promisc = (dev->flags & IFF_PROMISC);
1210 if (!NdisInit(promisc))
1219 static void *ndis_stats (struct device *dev)
1221 static struct net_device_stats stats;
1228 static int ndis_probe (struct device *dev)
1235 dev->open = ndis_open;
1237 dev->close = ndis_close;
1238 dev->get_stats = ndis_stats;
1239 dev->copy_rx_buf = NULL; /* to-do */
1240 dev->get_rx_buf = NULL; /* upcall is from rmode driver */
1241 dev->peek_rx_buf = NULL;
1242 dev->release_rx_buf = NULL;
1247 * Search & probe for supported 32-bit (pmode) pcap devices
1249 #if defined(USE_32BIT_DRIVERS)
1251 struct device el2_dev LOCKED_VAR = {
1260 struct device el3_dev LOCKED_VAR = {
1269 struct device tc515_dev LOCKED_VAR = {
1278 struct device tc59_dev LOCKED_VAR = {
1287 struct device tc90xbc_dev LOCKED_VAR = {
1296 struct device wd_dev LOCKED_VAR = {
1305 struct device ne_dev LOCKED_VAR = {
1314 struct device acct_dev LOCKED_VAR = {
1316 "Accton EtherPocket",
1323 struct device cs89_dev LOCKED_VAR = {
1325 "Crystal Semiconductor",
1332 struct device rtl8139_dev LOCKED_VAR = {
1338 rtl8139_probe /* dev->probe routine */
1342 * Dequeue routine is called by polling.
1343 * NOTE: the queue-element is not copied, only a pointer is
1344 * returned at '*buf'
1346 int peek_rxbuf (BYTE **buf)
1348 struct rx_elem *tail, *head;
1350 PCAP_ASSERT (pktq_check (&active_dev->queue));
1353 tail = pktq_out_elem (&active_dev->queue);
1354 head = pktq_in_elem (&active_dev->queue);
1359 PCAP_ASSERT (tail->size < active_dev->queue.elem_size-4-2);
1361 *buf = &tail->data[0];
1362 return (tail->size);
1369 * Release buffer we peeked at above.
1371 int release_rxbuf (BYTE *buf)
1374 struct rx_elem *tail = pktq_out_elem (&active_dev->queue);
1376 PCAP_ASSERT (&tail->data[0] == buf);
1380 pktq_inc_out (&active_dev->queue);
1385 * get_rxbuf() routine (in locked code) is called from IRQ handler
1386 * to request a buffer. Interrupts are disabled and we have a 32kB stack.
1388 BYTE *get_rxbuf (int len)
1392 if (len < ETH_MIN || len > ETH_MAX)
1395 idx = pktq_in_index (&active_dev->queue);
1399 static int fan_idx LOCKED_VAR = 0;
1400 writew ("-\\|/"[fan_idx++] | (15 << 8), /* white on black colour */
1401 0xB8000 + 2*79); /* upper-right corner, 80-col colour screen */
1404 /* writew (idx + '0' + 0x0F00, 0xB8000 + 2*78); */
1407 if (idx != active_dev->queue.out_index)
1409 struct rx_elem *head = pktq_in_elem (&active_dev->queue);
1412 active_dev->queue.in_index = idx;
1413 return (&head->data[0]);
1416 /* !!to-do: drop 25% of the oldest element
1418 pktq_clear (&active_dev->queue);
1423 * Simple ring-buffer queue handler for reception of packets
1424 * from network driver.
1426 #define PKTQ_MARKER 0xDEADBEEF
1428 static int pktq_check (struct rx_ringbuf *q)
1435 if (!q || !q->num_elem || !q->buf_start)
1441 for (i = 0; i < q->num_elem; i++)
1443 buf += q->elem_size;
1444 if (*(DWORD*)(buf - sizeof(DWORD)) != PKTQ_MARKER)
1451 static int pktq_init (struct rx_ringbuf *q, int size, int num, char *pool)
1455 q->elem_size = size;
1457 q->buf_start = pool;
1461 PCAP_ASSERT (size >= sizeof(struct rx_elem) + sizeof(DWORD));
1465 for (i = 0; i < num; i++)
1468 struct rx_elem *elem = (struct rx_elem*) pool;
1470 /* assert dword aligned elements
1472 PCAP_ASSERT (((unsigned)(&elem->data[0]) & 3) == 0);
1475 *(DWORD*) (pool - sizeof(DWORD)) = PKTQ_MARKER;
1481 * Increment the queue 'out_index' (tail).
1484 static int pktq_inc_out (struct rx_ringbuf *q)
1487 if (q->out_index >= q->num_elem)
1489 return (q->out_index);
1493 * Return the queue's next 'in_index' (head).
1496 static int pktq_in_index (struct rx_ringbuf *q)
1498 volatile int index = q->in_index + 1;
1500 if (index >= q->num_elem)
1506 * Return the queue's head-buffer.
1508 static struct rx_elem *pktq_in_elem (struct rx_ringbuf *q)
1510 return (struct rx_elem*) (q->buf_start + (q->elem_size * q->in_index));
1514 * Return the queue's tail-buffer.
1516 static struct rx_elem *pktq_out_elem (struct rx_ringbuf *q)
1518 return (struct rx_elem*) (q->buf_start + (q->elem_size * q->out_index));
1522 * Clear the queue ring-buffer by setting head=tail.
1524 static void pktq_clear (struct rx_ringbuf *q)
1526 q->in_index = q->out_index;
1530 * Symbols that must be linkable for "gcc -O0"
1538 #include "msdos/pm_drvr/ioport.h"
1539 #include "msdos/pm_drvr/dma.h"
1541 #endif /* USE_32BIT_DRIVERS */
1544 * Libpcap version string.
1547 pcap_lib_version(void)
1549 return ("DOS-" PCAP_VERSION_STRING);