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" );