2 * Copyright (c) 1990,1993 Regents of The University of Michigan.
3 * All Rights Reserved. See COPYRIGHT.
8 #endif /* HAVE_CONFIG_H */
16 #include <sys/types.h>
19 #include <sys/socket.h>
20 #include <atalk/logger.h>
24 #include <sys/param.h>
25 #ifndef HAVE_GETHOSTID
26 #include <sys/sysctl.h>
27 #endif /* HAVE_GETHOSTID */
31 #include <netatalk/at.h>
32 #include <netatalk/endian.h>
33 #include <atalk/dsi.h>
34 #include <atalk/atp.h>
35 #include <atalk/asp.h>
36 #include <atalk/nbp.h>
37 #include <atalk/unicode.h>
39 #include "globals.h" /* includes <netdb.h> */
41 #include "afp_config.h"
44 static size_t maxstatuslen = 0;
46 static void status_flags(char *data, const int notif, const int ipok,
47 const unsigned char passwdbits, const int dirsrvcs _U_, int flags)
51 status = AFPSRVRINFO_COPY;
52 if (passwdbits & PASSWD_SET) /* some uams may not allow this. */
53 status |= AFPSRVRINFO_PASSWD;
54 if (passwdbits & PASSWD_NOSAVE)
55 status |= AFPSRVRINFO_NOSAVEPASSWD;
56 status |= AFPSRVRINFO_SRVSIGNATURE;
57 /* only advertise tcp/ip if we have a valid address */
59 status |= AFPSRVRINFO_TCPIP;
60 status |= AFPSRVRINFO_SRVMSGS;
61 /* Allow the user to decide if we should support server notifications.
62 * With this turned off, the clients will poll for directory changes every
63 * 10 seconds. This might be too costly to network resources, so make
64 * this an optional thing. Default will be to _not_ support server
67 status |= AFPSRVRINFO_SRVNOTIFY;
69 status |= AFPSRVRINFO_FASTBOZO;
70 status |= AFPSRVRINFO_SRVRDIR; /* AFP 3.1 specs says we need to specify this, but may set the count to 0 */
71 /* We don't set the UTF8 name flag here, we don't know whether we have enough space ... */
73 if (flags & OPTION_UUID) /* 05122008 FIXME: can we set AFPSRVRINFO_UUID here ? see AFPSRVRINFO_SRVRDIR*/
74 status |= AFPSRVRINFO_UUID;
76 status = htons(status);
77 memcpy(data + AFPSTATUS_FLAGOFF, &status, sizeof(status));
80 static int status_server(char *data, const char *server, const struct afp_options *options)
83 char *Obj, *Type, *Zone;
88 /* make room for all offsets before server name */
89 data += AFPSTATUS_PRELEN;
91 /* extract the obj part of the server */
92 Obj = (char *) server;
94 nbp_name(server, &Obj, &Type, &Zone);
96 if ((size_t)-1 == (len = convert_string(
97 options->unixcharset, options->maccharset,
98 Obj, -1, buf, sizeof(buf))) ) {
99 len = MIN(strlen(Obj), 31);
101 memcpy( data, Obj, len );
102 LOG ( log_error, logtype_afpd, "Could not set servername, using fallback");
105 memcpy( data, buf, len );
107 if ((len + 1) & 1) /* pad server name and length byte to even boundary */
111 /* make room for signature and net address offset. save location of
112 * signature offset. we're also making room for directory names offset
113 * and the utf-8 server name offset.
115 * NOTE: technically, we don't need to reserve space for the
116 * signature and net address offsets if they're not going to be
117 * used. as there are no offsets after them, it doesn't hurt to
118 * have them specified though. so, we just do that to simplify
121 * NOTE2: AFP3.1 Documentation states that the directory names offset
122 * is a required feature, even though it can be set to zero.
125 status = htons(len + AFPSTATUS_POSTLEN);
126 memcpy(start + AFPSTATUS_MACHOFF, &status, sizeof(status));
127 return len; /* return the offset to beginning of signature offset */
130 static void status_machine(char *data)
136 const char *machine = "afs";
138 const char *machine = "Netatalk";
141 memcpy(&status, start + AFPSTATUS_MACHOFF, sizeof(status));
142 data += ntohs( status );
143 len = strlen( machine );
145 memcpy( data, machine, len );
147 status = htons(data - start);
148 memcpy(start + AFPSTATUS_VERSOFF, &status, sizeof(status));
151 /* server signature is a 16-byte quantity */
152 static u_int16_t status_signature(char *data, int *servoffset,
153 const struct afp_options *options)
156 u_int16_t offset, sigoff;
160 /* get server signature offset */
161 memcpy(&offset, data + *servoffset, sizeof(offset));
162 sigoff = offset = ntohs(offset);
164 /* jump to server signature offset */
168 memcpy(data, options->signature, 16);
171 /* calculate net address offset */
172 *servoffset += sizeof(offset);
173 offset = htons(data - status);
174 memcpy(status + *servoffset, &offset, sizeof(offset));
178 static size_t status_netaddress(char *data, int *servoffset,
179 const ASP asp, const DSI *dsi,
180 const struct afp_options *options)
184 size_t addresses_len = 0;
188 /* get net address offset */
189 memcpy(&offset, data + *servoffset, sizeof(offset));
190 data += ntohs(offset);
194 len (byte = sizeof(length + address type + address)
195 address type (byte, ip address = 0x01, ip + port = 0x02,
196 ddp address = 0x03, fqdn = 0x04)
197 address (up to 254 bytes, ip = 4, ip + port = 6, ddp = 4)
200 /* number of addresses. this currently screws up if we have a dsi
201 connection, but we don't have the ip address. to get around this,
202 we turn off the status flag for tcp/ip. */
203 *data++ = ((options->fqdn && dsi)? 1 : 0) + (dsi ? 1 : 0) + (asp ? 1 : 0) +
204 (((options->flags & OPTION_ANNOUNCESSH) && options->fqdn && dsi)? 1 : 0);
208 if (dsi->server.ss_family == AF_INET) { /* IPv4 */
209 const struct sockaddr_in *inaddr = (struct sockaddr_in *)&dsi->server;
210 if (inaddr->sin_port == htons(DSI_AFPOVERTCP_PORT)) {
211 *data++ = 6; /* length */
212 *data++ = 0x01; /* basic ip address */
213 memcpy(data, &inaddr->sin_addr.s_addr,
214 sizeof(inaddr->sin_addr.s_addr));
215 data += sizeof(inaddr->sin_addr.s_addr);
218 /* ip address + port */
220 *data++ = 0x02; /* ip address with port */
221 memcpy(data, &inaddr->sin_addr.s_addr,
222 sizeof(inaddr->sin_addr.s_addr));
223 data += sizeof(inaddr->sin_addr.s_addr);
224 memcpy(data, &inaddr->sin_port, sizeof(inaddr->sin_port));
225 data += sizeof(inaddr->sin_port);
229 const struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&dsi->server;
230 if (sa6->sin6_port == htons(DSI_AFPOVERTCP_PORT)) {
231 *data++ = 18; /* length */
232 *data++ = 6; /* type */
233 memcpy(data, &sa6->sin6_addr.s6_addr, sizeof(sa6->sin6_addr.s6_addr));
234 data += sizeof(sa6->sin6_addr.s6_addr);
237 /* ip address + port */
238 *data++ = 20; /* length */
239 *data++ = 7; /* type*/
240 memcpy(data, &sa6->sin6_addr.s6_addr, sizeof(sa6->sin6_addr.s6_addr));
241 data += sizeof(sa6->sin6_addr.s6_addr);
242 memcpy(data, &sa6->sin6_port, sizeof(sa6->sin6_port));
243 data += sizeof(sa6->sin6_port);
250 /* handle DNS names */
251 if (options->fqdn && dsi) {
252 size_t len = strlen(options->fqdn);
253 if ( len + 2 + addresses_len < maxstatuslen - offset) {
256 memcpy(data, options->fqdn, len);
258 addresses_len += len+2;
261 /* Annouce support for SSH tunneled AFP session,
262 * this feature is available since 10.3.2.
263 * According to the specs (AFP 3.1 p.225) this should
264 * be an IP+Port style value, but it only works with
265 * a FQDN. OSX Server uses FQDN as well.
267 if ( len + 2 + addresses_len < maxstatuslen - offset) {
268 if (options->flags & OPTION_ANNOUNCESSH) {
271 memcpy(data, options->fqdn, len);
279 const struct sockaddr_at *ddpaddr = atp_sockaddr(asp->asp_atp);
283 *data++ = 0x03; /* ddp address */
284 memcpy(data, &ddpaddr->sat_addr.s_net, sizeof(ddpaddr->sat_addr.s_net));
285 data += sizeof(ddpaddr->sat_addr.s_net);
286 memcpy(data, &ddpaddr->sat_addr.s_node,
287 sizeof(ddpaddr->sat_addr.s_node));
288 data += sizeof(ddpaddr->sat_addr.s_node);
289 memcpy(data, &ddpaddr->sat_port, sizeof(ddpaddr->sat_port));
290 data += sizeof(ddpaddr->sat_port);
292 #endif /* ! NO_DDP */
294 /* calculate/store Directory Services Names offset */
295 offset = htons(data - begin);
296 *servoffset += sizeof(offset);
297 memcpy(begin + *servoffset, &offset, sizeof(offset));
299 /* return length of buffer */
300 return (data - begin);
303 static size_t status_directorynames(char *data, int *diroffset,
305 const struct afp_options *options)
309 memcpy(&offset, data + *diroffset, sizeof(offset));
310 offset = ntohs(offset);
313 /* I can not find documentation of any other purpose for the
314 * DirectoryNames field.
317 * Try to synthesize a principal:
318 * service '/' fqdn '@' realm
320 if (options->k5service && options->k5realm && options->fqdn) {
321 /* should k5princ be utf8 encoded? */
323 char *p = strchr( options->fqdn, ':' );
326 len = strlen( options->k5service )
327 + strlen( options->fqdn )
328 + strlen( options->k5realm );
329 len+=2; /* '/' and '@' */
330 if ( len > 255 || len+2 > maxstatuslen - offset) {
332 LOG ( log_error, logtype_afpd, "status: could not set directory service list, no more room");
335 *data++ = 1; /* DirectoryNamesCount */
337 snprintf( data, len + 1, "%s/%s@%s", options->k5service,
338 options->fqdn, options->k5realm );
347 /* Calculate and store offset for UTF8ServerName */
348 *diroffset += sizeof(u_int16_t);
349 offset = htons(data - begin);
350 memcpy(begin + *diroffset, &offset, sizeof(u_int16_t));
352 /* return length of buffer */
353 return (data - begin);
356 static size_t status_utf8servername(char *data, int *nameoffset,
358 const struct afp_options *options)
360 char *Obj, *Type, *Zone;
364 u_int16_t offset, status;
366 memcpy(&offset, data + *nameoffset, sizeof(offset));
367 offset = ntohs(offset);
371 * What is the valid character range for an nbpname?
373 * Apple's server likes to use the non-qualified hostname
374 * This obviously won't work very well if multiple servers are running
378 /* extract the obj part of the server */
379 Obj = (char *) (options->server ? options->server : options->hostname);
381 nbp_name(options->server ? options->server : options->hostname, &Obj, &Type, &Zone);
383 if ((size_t) -1 == (len = convert_string (
384 options->unixcharset, CH_UTF8_MAC,
385 Obj, -1, data+sizeof(namelen), maxstatuslen-offset )) ) {
386 LOG ( log_error, logtype_afpd, "Could not set utf8 servername");
388 /* set offset to 0 */
389 memset(begin + *nameoffset, 0, sizeof(offset));
390 data = begin + offset;
392 namelen = htons(len);
393 memcpy( data, &namelen, sizeof(namelen));
394 data += sizeof(namelen);
396 offset = htons(offset);
397 memcpy(begin + *nameoffset, &offset, sizeof(u_int16_t));
399 /* Now set the flag ... */
400 memcpy(&status, begin + AFPSTATUS_FLAGOFF, sizeof(status));
401 status = ntohs(status);
402 status |= AFPSRVRINFO_SRVUTF8;
403 status = htons(status);
404 memcpy(begin + AFPSTATUS_FLAGOFF, &status, sizeof(status));
407 /* return length of buffer */
408 return (data - begin);
412 /* returns actual offset to signature */
413 static void status_icon(char *data, const unsigned char *icondata,
414 const int iconlen, const int sigoffset)
417 char *sigdata = data + sigoffset;
418 u_int16_t ret, status;
420 memcpy(&status, start + AFPSTATUS_ICONOFF, sizeof(status));
421 if ( icondata == NULL ) {
423 memset(start + AFPSTATUS_ICONOFF, 0, sizeof(status));
425 data += ntohs( status );
426 memcpy( data, icondata, iconlen);
428 ret = htons(data - start);
431 /* put in signature offset */
433 memcpy(sigdata, &ret, sizeof(ret));
436 /* ---------------------
438 void status_init(AFPConfig *aspconfig, AFPConfig *dsiconfig,
439 const struct afp_options *options)
447 if (!(aspconfig || dsiconfig) || !options)
451 status = aspconfig->status;
452 maxstatuslen=sizeof(aspconfig->status);
453 asp = aspconfig->obj.handle;
459 status = dsiconfig->status;
460 maxstatuslen=sizeof(dsiconfig->status);
461 dsi = dsiconfig->obj.handle;
462 if (dsi->server.ss_family == AF_INET) { /* IPv4 */
463 const struct sockaddr_in *sa4 = (struct sockaddr_in *)&dsi->server;
464 ipok = sa4->sin_addr.s_addr ? 1 : 0;
466 const struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&dsi->server;
467 for (int i=0; i<16; i++) {
468 if (sa6->sin6_addr.s6_addr[i]) {
478 * These routines must be called in order -- earlier calls
479 * set the offsets for later calls.
481 * using structs is a bad idea, but that's what the original code
482 * does. solaris, in fact, will segfault with them. so, now
483 * we just use the powers of #defines and memcpy.
485 * reply block layout (offsets are 16-bit quantities):
486 * machine type offset -> AFP version count offset ->
487 * UAM count offset -> vol icon/mask offset -> flags ->
489 * server name [padded to even boundary] -> signature offset ->
490 * network address offset ->
492 * at the appropriate offsets:
493 * machine type, afp versions, uams, server signature
494 * (16-bytes), network addresses, volume icon/mask
498 options->server_notif,
499 (options->fqdn || ipok),
501 (options->k5service && options->k5realm && options->fqdn),
503 /* returns offset to signature offset */
504 c = status_server(status, options->server ? options->server :
505 options->hostname, options);
506 status_machine(status);
507 status_versions(status, asp, dsi);
508 status_uams(status, options->uamlist);
509 if (options->flags & OPTION_CUSTOMICON)
510 status_icon(status, icon, sizeof(icon), c);
512 status_icon(status, apple_atalk_icon, sizeof(apple_atalk_icon), c);
514 sigoff = status_signature(status, &c, options);
515 /* c now contains the offset where the netaddress offset lives */
517 status_netaddress(status, &c, asp, dsi, options);
518 /* c now contains the offset where the Directory Names Count offset lives */
520 statuslen = status_directorynames(status, &c, dsi, options);
521 /* c now contains the offset where the UTF-8 ServerName offset lives */
523 if ( statuslen < maxstatuslen)
524 statuslen = status_utf8servername(status, &c, dsi, options);
528 if (dsiconfig) /* status is dsiconfig->status */
529 memcpy(aspconfig->status, status, statuslen);
530 asp_setstatus(asp, status, statuslen);
531 aspconfig->signature = status + sigoff;
532 aspconfig->statuslen = statuslen;
534 #endif /* ! NO_DDP */
537 if ((options->flags & OPTION_CUSTOMICON) == 0) {
538 status_icon(status, apple_tcp_icon, sizeof(apple_tcp_icon), 0);
540 dsi_setstatus(dsi, status, statuslen);
541 dsiconfig->signature = status + sigoff;
542 dsiconfig->statuslen = statuslen;
546 /* set_signature() */
548 /* If found in conf file, use it. */
549 /* If not found in conf file, genarate and append in conf file. */
550 /* If conf file don't exist, create and genarate. */
551 /* If cannot open conf file, use one-time signature. */
552 /* If -signature user:xxxxx, use it. */
554 void set_signature(struct afp_options *options) {
558 char *servername_conf;
561 FILE *fp = NULL, *randomp;
565 server_tmp = (options->server ? options->server : options->hostname);
566 if (strcmp(options->signatureopt, "auto") == 0) {
567 goto server_signature_auto; /* default */
568 } else if (strcmp(options->signatureopt, "host") == 0) {
569 LOG(log_warning, logtype_afpd, "WARNING: option \"-signature host\" is obsoleted. Switching back to auto.", options->signatureopt);
570 goto server_signature_auto; /* same as auto */
571 } else if (strncmp(options->signatureopt, "user", 4) == 0) {
572 goto server_signature_user; /* user string */
574 LOG(log_error, logtype_afpd, "ERROR: option \"-signature %s\" is not valid. Switching back to auto.", options->signatureopt);
575 goto server_signature_auto; /* switch back to auto*/
578 server_signature_user:
580 /* Signature type is user string */
581 len = strlen(options->signatureopt);
583 LOG(log_warning, logtype_afpd, "WARNING: option \"-signature %s\" is not valid. Switching back to auto.", options->signatureopt);
584 goto server_signature_auto;
586 usersign = options->signatureopt + 5;
589 LOG(log_warning, logtype_afpd, "WARNING: signature user string %s is very long !", usersign);
591 } else if (len >= 3) {
592 LOG(log_info, logtype_afpd, "signature user string is %s.", usersign);
594 LOG(log_warning, logtype_afpd, "WARNING: signature user string %s is very short !", usersign);
596 memset(options->signature, 0, 16);
597 memcpy(options->signature, usersign, len);
598 goto server_signature_done;
600 server_signature_auto:
602 /* Signature type is auto, using afp_signature.conf */
603 if (!stat(options->sigconffile, &tmpstat)) { /* conf file exists? */
604 if ((fp = fopen(options->sigconffile, "r")) != NULL) { /* read open? */
605 /* scan in the conf file */
606 while (fgets(buf, sizeof(buf), fp) != NULL) {
608 while (p && isblank(*p))
610 if (!p || (*p == '#') || (*p == '\n'))
611 continue; /* invalid line */
614 if ((servername_conf = strtok( p, "\"" )) == NULL)
615 continue; /* syntax error: invalid quoted servername */
617 if ((servername_conf = strtok( p, " \t" )) == NULL)
618 continue; /* syntax error: invalid servername */
623 continue; /* syntax error: missing signature */
625 if (strcmp(server_tmp, servername_conf))
626 continue; /* another servername */
628 while (p && isblank(*p))
630 if ( 16 == sscanf(p, "%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX",
631 &options->signature[ 0], &options->signature[ 1],
632 &options->signature[ 2], &options->signature[ 3],
633 &options->signature[ 4], &options->signature[ 5],
634 &options->signature[ 6], &options->signature[ 7],
635 &options->signature[ 8], &options->signature[ 9],
636 &options->signature[10], &options->signature[11],
637 &options->signature[12], &options->signature[13],
638 &options->signature[14], &options->signature[15]
641 goto server_signature_done; /* found in conf file */
644 if ((fp = freopen(options->sigconffile, "a+", fp)) != NULL) { /* append because not found */
645 fseek(fp, 0L, SEEK_END);
646 if(ftell(fp) == 0) { /* size = 0 */
648 goto server_signature_random;
650 fseek(fp, -1L, SEEK_END);
651 if(fgetc(fp) != '\n') fputc('\n', fp); /* last char is \n? */
652 goto server_signature_random;
655 LOG(log_error, logtype_afpd, "ERROR: Cannot write in %s (%s). Using one-time signature.",
656 options->sigconffile, strerror(errno));
657 goto server_signature_random;
660 LOG(log_error, logtype_afpd, "ERROR: Cannot read %s (%s). Using one-time signature.",
661 options->sigconffile, strerror(errno));
662 goto server_signature_random;
664 } else { /* conf file don't exist */
665 if (( fd = creat(options->sigconffile, 0644 )) < 0 ) {
666 LOG(log_error, logtype_atalkd, "Cannot create %s (%s). Using one-time signature.",
667 options->sigconffile, strerror(errno));
668 goto server_signature_random;
670 if (( fp = fdopen( fd, "w" )) == NULL ) {
671 LOG(log_error, logtype_atalkd, "Cannot fdopen %s (%s). Using one-time signature.",
672 options->sigconffile, strerror(errno));
674 goto server_signature_random;
677 goto server_signature_random;
680 server_signature_random:
682 /* generate signature from random number */
683 randombytes(options->signature, 16);
685 if (fp && header) { /* conf file is created or size=0 */
686 fprintf(fp, "# DON'T TOUCH NOR COPY THOUGHTLESSLY!\n");
687 fprintf(fp, "# This file is auto-generated by afpd.\n");
689 fprintf(fp, "# ServerSignature is unique identifier used to prevent logging on to\n");
690 fprintf(fp, "# the same server twice.\n");
692 fprintf(fp, "# If setting \"-signature user:xxxxx\" in afpd.conf, this file is not used.\n\n");
696 fprintf(fp, "\"%s\"\t", server_tmp);
697 for (i=0 ; i<16 ; i++) {
698 fprintf(fp, "%02X", (options->signature)[i]);
700 fprintf(fp, "%s", "\n");
704 server_signature_done:
707 LOG(log_info, logtype_afpd,
708 " \"%s\"'s signature is %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
710 (options->signature)[ 0], (options->signature)[ 1],
711 (options->signature)[ 2], (options->signature)[ 3],
712 (options->signature)[ 4], (options->signature)[ 5],
713 (options->signature)[ 6], (options->signature)[ 7],
714 (options->signature)[ 8], (options->signature)[ 9],
715 (options->signature)[10], (options->signature)[11],
716 (options->signature)[12], (options->signature)[13],
717 (options->signature)[14], (options->signature)[15]);
722 /* this is the same as asp/dsi_getstatus */
723 int afp_getsrvrinfo(AFPObj *obj, char *ibuf _U_, size_t ibuflen _U_, char *rbuf, size_t *rbuflen)
725 AFPConfig *config = obj->config;
727 memcpy(rbuf, config->status, config->statuslen);
728 *rbuflen = config->statuslen;