2 * Copyright (C) 1995 Advanced RISC Machines Limited. All rights reserved.
4 * This software may be freely used, copied, modified, and distributed
5 * provided that the above copyright notice is preserved in all copies of the
15 * etherdrv.c - Ethernet Driver for Angel.
19 # define _POSIX_SOURCE 1
20 # define _HPUX_SOURCE 1
21 # define _XOPEN_SOURCE 1
26 # define uint hide_HPs_uint
37 # define uint hide_HPs_uint
48 #ifdef COMPILING_ON_WINDOWS
49 typedef char * caddr_t
;
52 # include "angeldll.h"
55 # define uint hide_HPs_uint
57 # include <sys/types.h>
58 # include <sys/socket.h>
63 # include <sys/time.h>
64 # include <sys/ioctl.h>
65 # if !defined(__hpux) && !defined(__linux__) && !defined(_WIN32)
66 # include <sys/filio.h>
68 # include <netinet/in.h>
69 # include <arpa/inet.h>
82 #ifndef COMPILING_ON_WINDOWS
83 /* These two might not work for windows. */
85 extern char * sys_errlist
[];
89 # define UNUSED(x) (x = x) /* Silence compiler warnings */
93 * forward declarations of static functions
95 static int EthernetOpen(const char *name
, const char *arg
);
96 static int EthernetMatch(const char *name
, const char *arg
);
97 static void EthernetClose(void);
98 static int EthernetRead(DriverCall
*dc
, bool block
);
99 static int EthernetWrite(DriverCall
*dc
);
100 static int EthernetIoctl(const int opcode
, void *args
);
103 * the device descriptor for Ethernet
105 DeviceDescr angel_EthernetDevice
=
117 * descriptor for the socket that we talk down
119 static int sock
= -1;
122 * address of the remote target
124 static struct sockaddr_in remote
, *ia
= &remote
;
127 * array of dynamic port numbers on target
129 static unsigned short int ports
[2];
132 * Function: set_address
133 * Purpose: Try to get an address into an understandable form
136 * Input: addr The address to parse
138 * Output: ia Structure to hold the parsed address
144 static int set_address(const char *const addr
, struct sockaddr_in
*const ia
)
146 ia
->sin_family
= AF_INET
;
149 * Try address as a dotted decimal
151 ia
->sin_addr
.s_addr
= inet_addr(addr
);
154 * If that failed, try it as a hostname
156 if (ia
->sin_addr
.s_addr
== (u_int
)-1)
158 struct hostent
*hp
= gethostbyname(addr
);
163 (void)memcpy((caddr_t
)&ia
->sin_addr
, hp
->h_addr
, hp
->h_length
);
170 * Function: open_socket
171 * Purpose: Open a non-blocking UDP socket, and bind it to a port
172 * assigned by the system.
177 * OK: socket descriptor
180 static int open_socket(void)
183 #if 0 /* see #if 0 just below -VVV- */
186 struct sockaddr_in local
;
191 #ifdef COMPILING_ON_WINDOWS
192 if ((sfd
= socket(AF_INET
, SOCK_DGRAM
, 0)) == INVALID_SOCKET
)
195 if ((sfd
= socket(AF_INET
, SOCK_DGRAM
, 0)) < 0)
207 * I don't believe that this should be necessary - if we
208 * use select(), then non-blocking I/O is redundant.
209 * Unfortunately, select() appears to be broken (under
210 * Solaris, with a limited amount of time available for
211 * debug), so this code stays in for the time being
215 * enable non-blocking I/O
217 if (ioctlsocket(sfd
, FIONBIO
, &yesplease
) < 0)
220 perror("ioctl(FIONBIO)");
229 * bind local address to a system-assigned port
231 memset((char *)&local
, 0, sizeof(local
));
232 local
.sin_family
= AF_INET
;
233 local
.sin_port
= htons(0);
234 local
.sin_addr
.s_addr
= INADDR_ANY
;
235 if (bind(sfd
, (struct sockaddr
*)&local
, sizeof(local
)) < 0)
252 * Function: fetch_ports
253 * Purpose: Request assigned port numbers from remote target
259 * Post-conditions: This routine will *always* return something for the
260 * port numbers. If the remote target does not
261 * respond, then it makes something up - this allows
262 * the standard error message (from ardi.c) to be
263 * generated when the target is dead for whatever
266 static void fetch_ports(void)
269 const char ctrlpacket
[] = CTRL_MAGIC
;
270 CtrlResponse response
;
273 * we will try 3 times to elicit a response from the target
275 for (i
= 0; i
< 3; ++i
)
281 * send the magic string to the control
282 * port on the remote target
284 ia
->sin_port
= htons(CTRL_PORT
);
285 if (sendto(sock
, ctrlpacket
, sizeof(ctrlpacket
), 0,
286 (struct sockaddr
*)ia
, sizeof(*ia
)) < 0)
289 perror("fetch_ports: sendto");
295 FD_SET(sock
, &fdset
);
299 if (select(sock
+ 1, &fdset
, NULL
, NULL
, &tv
) < 0)
302 perror("fetch_ports: select");
307 if (FD_ISSET(sock
, &fdset
))
310 * there is something there - read it
312 if (recv(sock
, (char *)&response
, sizeof(response
), 0) < 0)
314 #ifdef COMPILING_ON_WINDOWS
315 unsigned int werrno
= WSAGetLastError();
317 if (werrno
== WSAEWOULDBLOCK
|| werrno
== 0)
319 if (errno
== EWOULDBLOCK
)
328 perror("fetch_ports: recv");
337 * this is *very* unpleasant - try to match the structure
340 unsigned short *sptr
= (unsigned short *)(response
+ RESP_DBUG
);
342 if (strcmp(response
, ctrlpacket
) == 0)
344 ports
[DBUG_INDEX
] = htons(*sptr
);
346 ports
[APPL_INDEX
] = htons(*sptr
);
350 printf("fetch_ports: got response, DBUG=%d, APPL=%d\n",
351 ports
[DBUG_INDEX
], ports
[APPL_INDEX
]);
359 * we failed to get a response
362 printf("fetch_ports: failed to get a real answer\n");
367 * Function: read_packet
368 * Purpose: read a packet, and pass it back to higher levels
371 * In/Out: packet Holder for the read packet
373 * Returns: 1 - Packet is complete
374 * 0 - No complete packet read
376 * Post-conditions: Will call panic() if something goes wrong with the OS
378 static int read_packet(struct data_packet
*const packet
)
380 struct sockaddr_in from
;
381 int nbytes
, fromlen
= sizeof(from
);
385 * try to get the packet
387 if ((nbytes
= recvfrom(sock
, (char *)(packet
->data
), packet
->buf_len
, 0,
388 (struct sockaddr
*)&from
, &fromlen
)) < 0)
390 #ifdef COMPILING_ON_WINDOWS
391 if (nbytes
== SOCKET_ERROR
&& WSAGetLastError() != WSAEWOULDBLOCK
)
392 MessageBox(GetFocus(), "Error receiving packet\n", "Angel", MB_OK
| MB_ICONSTOP
);
394 if (errno
!= EWOULDBLOCK
)
399 panic("ethernet recv failure");
405 #ifdef COMPILING_ON_WINDOWS
406 if (pfnProgressCallback
!= NULL
&& nbytes
!= SOCKET_ERROR
)
408 progressInfo
.nRead
+= nbytes
;
409 (*pfnProgressCallback
)(&progressInfo
);
414 * work out where the packet was from
416 if (from
.sin_addr
.s_addr
!= remote
.sin_addr
.s_addr
)
419 * not from our target - ignore it
422 printf("read_packet: ignoring packet from %s\n",
423 inet_ntoa(from
.sin_addr
));
428 else if (ntohs(from
.sin_port
) == ports
[DBUG_INDEX
])
430 else if (ntohs(from
.sin_port
) == ports
[APPL_INDEX
])
435 * unknown port number - ignore it
438 printf("read_packet: ignore packet from port %hd\n",
439 htons(from
.sin_port
));
445 #if defined(DEBUG) && !defined(DO_TRACE)
446 printf("EthernetRead: %d bytes from %s channel\n",
447 nbytes
, (devchan
== DC_DBUG
) ? "DBUG" : "APPL");
451 printf("[%d on %d]\n", nbytes
, devchan
);
454 unsigned char *cptr
= packet
->data
;
458 printf("<%02X ", *(cptr
++));
470 * OK - fill in the details
472 packet
->type
= devchan
;
473 packet
->len
= nbytes
;
477 /**********************************************************************/
480 * Function: Ethernet_Open
481 * Purpose: Open the Ethernet device. See the documentation for
482 * DeviceOpen in drivers.h
484 * Post-conditions: Will have updated struct sockaddr_in remote (*ia)
485 * with the address of the remote target.
487 static int EthernetOpen(const char *name
, const char *arg
)
489 #ifdef COMPILING_ON_WINDOWS
490 WORD wVersionRequested
;
494 * name is passed as e=<blah>, so skip 1st two characters
496 const char *etheraddr
= name
+ 2;
499 printf("EthernetOpen: name `%s'\n", name
);
502 /* Check that the name is a valid one */
503 if (EthernetMatch(name
, arg
) != 0)
506 #ifdef COMPILING_ON_WINDOWS
507 wVersionRequested
= MAKEWORD(1, 1);
508 if (WSAStartup(wVersionRequested
, &wsaData
) != 0)
510 * Couldn't find a useable winsock.dll.
514 if ( LOBYTE( wsaData
.wVersion
) != 1 || HIBYTE( wsaData
.wVersion
) != 1 )
519 * Couldn't find a winsock.dll with supported version.
525 memset((char *)ia
, 0, sizeof(*ia
));
526 if (set_address(etheraddr
, ia
) < 0)
528 #ifdef COMPILING_ON_WINDOWS
530 * SJ - I'm not sure that this is the correct way to handle this
531 * as Fail calls remote_disable and exits, while panic just exits.
532 * However at the time of writing remote_disable does nothing!
534 /* Panic("EthernetOpen: bad name `%s'\n", etheraddr); */
536 Fail("EthernetOpen: bad name `%s'\n", etheraddr
);
541 if ((sock
= open_socket()) < 0)
545 * fetch the port numbers assigned by the remote target
546 * to its Debug and Application sockets
553 static int EthernetMatch(const char *name
, const char *arg
)
562 if (tolower(name
[0]) != 'e' || name
[1] != '=')
568 static void EthernetClose(void)
576 #ifdef COMPILING_ON_WINDOWS
581 static int EthernetRead(DriverCall
*dc
, bool block
)
588 FD_SET(sock
, &fdset
);
590 #ifdef COMPILING_ON_WINDOWS
592 tv
.tv_sec
= tv
.tv_usec
= 0;
595 tv
.tv_usec
= (block
? 10000 : 0);
598 err
= select(sock
+ 1, &fdset
, NULL
, NULL
, &tv
);
601 if (errno
== EINTR
) {
604 panic("ethernet select failure (errno=%i)",errno
);
608 if (FD_ISSET(sock
, &fdset
))
609 return read_packet(&dc
->dc_packet
);
614 static int EthernetWrite(DriverCall
*dc
)
617 struct data_packet
*packet
= &dc
->dc_packet
;
619 if (packet
->type
== DC_DBUG
)
620 ia
->sin_port
= htons(ports
[DBUG_INDEX
]);
621 else if (packet
->type
== DC_APPL
)
622 ia
->sin_port
= htons(ports
[APPL_INDEX
]);
625 panic("EthernetWrite: unknown devchan");
629 #if defined(DEBUG) && !defined(DO_TRACE)
630 printf("EthernetWrite: %d bytes to %s channel\n",
631 packet
->len
, (packet
->type
== DC_DBUG
) ? "DBUG" : "APPL");
635 printf("[%d on %d]\n", packet
->len
, packet
->type
);
638 unsigned char *cptr
= packet
->data
;
640 while (i
< packet
->len
)
642 printf(">%02X ", *(cptr
++));
653 if ((nbytes
= sendto(sock
, (char *)(packet
->data
), packet
->len
, 0,
654 (struct sockaddr
*)ia
, sizeof(*ia
))) != packet
->len
)
656 #ifdef COMPILING_ON_WINDOWS
657 if (nbytes
== SOCKET_ERROR
&& WSAGetLastError() != WSAEWOULDBLOCK
)
659 if (nbytes
< 0 && errno
!= EWOULDBLOCK
)
665 #ifdef COMPILING_ON_WINDOWS
666 panic("ethernet send failure\n");
668 /* might not work for Windows */
669 panic("ethernet send failure [%s]\n",
670 errno
< sys_nerr
? sys_errlist
[errno
] : "unknown errno");
674 else if (nbytes
>= 0)
675 fprintf(stderr
, "ethernet send: asked for %d, sent %d\n", packet
->len
, nbytes
);
680 #ifdef COMPILING_ON_WINDOWS
681 if (pfnProgressCallback
!= NULL
&& nbytes
!= SOCKET_ERROR
)
683 progressInfo
.nWritten
+= nbytes
;
684 (*pfnProgressCallback
)(&progressInfo
);
691 static int EthernetIoctl(const int opcode
, void *args
)
694 printf( "EthernetIoctl: op %d arg %x\n", opcode
, args
);
712 printf( "EthernetIoctl: resync\n" );