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;
93 nbp_name(server, &Obj, &Type, &Zone);
94 if ((size_t)-1 == (len = convert_string(
95 options->unixcharset, options->maccharset,
96 Obj, -1, buf, sizeof(buf))) ) {
97 len = MIN(strlen(Obj), 31);
99 memcpy( data, Obj, len );
100 LOG ( log_error, logtype_afpd, "Could not set servername, using fallback");
103 memcpy( data, buf, len );
105 if ((len + 1) & 1) /* pad server name and length byte to even boundary */
109 /* make room for signature and net address offset. save location of
110 * signature offset. we're also making room for directory names offset
111 * and the utf-8 server name offset.
113 * NOTE: technically, we don't need to reserve space for the
114 * signature and net address offsets if they're not going to be
115 * used. as there are no offsets after them, it doesn't hurt to
116 * have them specified though. so, we just do that to simplify
119 * NOTE2: AFP3.1 Documentation states that the directory names offset
120 * is a required feature, even though it can be set to zero.
123 status = htons(len + AFPSTATUS_POSTLEN);
124 memcpy(start + AFPSTATUS_MACHOFF, &status, sizeof(status));
125 return len; /* return the offset to beginning of signature offset */
128 static void status_machine(char *data)
134 const char *machine = "afs";
136 const char *machine = "Netatalk";
139 memcpy(&status, start + AFPSTATUS_MACHOFF, sizeof(status));
140 data += ntohs( status );
141 len = strlen( machine );
143 memcpy( data, machine, len );
145 status = htons(data - start);
146 memcpy(start + AFPSTATUS_VERSOFF, &status, sizeof(status));
149 /* server signature is a 16-byte quantity */
150 static u_int16_t status_signature(char *data, int *servoffset,
151 const struct afp_options *options)
154 u_int16_t offset, sigoff;
158 /* get server signature offset */
159 memcpy(&offset, data + *servoffset, sizeof(offset));
160 sigoff = offset = ntohs(offset);
162 /* jump to server signature offset */
166 memcpy(data, options->signature, 16);
169 /* calculate net address offset */
170 *servoffset += sizeof(offset);
171 offset = htons(data - status);
172 memcpy(status + *servoffset, &offset, sizeof(offset));
176 static size_t status_netaddress(char *data, int *servoffset,
177 const ASP asp, const DSI *dsi,
178 const struct afp_options *options)
182 size_t addresses_len = 0;
186 /* get net address offset */
187 memcpy(&offset, data + *servoffset, sizeof(offset));
188 data += ntohs(offset);
192 len (byte = sizeof(length + address type + address)
193 address type (byte, ip address = 0x01, ip + port = 0x02,
194 ddp address = 0x03, fqdn = 0x04)
195 address (up to 254 bytes, ip = 4, ip + port = 6, ddp = 4)
198 /* number of addresses. this currently screws up if we have a dsi
199 connection, but we don't have the ip address. to get around this,
200 we turn off the status flag for tcp/ip. */
201 *data++ = ((options->fqdn && dsi)? 1 : 0) + (dsi ? 1 : 0) + (asp ? 1 : 0) +
202 (((options->flags & OPTION_ANNOUNCESSH) && options->fqdn && dsi)? 1 : 0);
206 if (dsi->server.ss_family == AF_INET) { /* IPv4 */
207 const struct sockaddr_in *inaddr = (struct sockaddr_in *)&dsi->server;
208 if (inaddr->sin_port == htons(DSI_AFPOVERTCP_PORT)) {
209 *data++ = 6; /* length */
210 *data++ = 0x01; /* basic ip address */
211 memcpy(data, &inaddr->sin_addr.s_addr,
212 sizeof(inaddr->sin_addr.s_addr));
213 data += sizeof(inaddr->sin_addr.s_addr);
216 /* ip address + port */
218 *data++ = 0x02; /* ip address with port */
219 memcpy(data, &inaddr->sin_addr.s_addr,
220 sizeof(inaddr->sin_addr.s_addr));
221 data += sizeof(inaddr->sin_addr.s_addr);
222 memcpy(data, &inaddr->sin_port, sizeof(inaddr->sin_port));
223 data += sizeof(inaddr->sin_port);
227 const struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&dsi->server;
228 if (sa6->sin6_port == htons(DSI_AFPOVERTCP_PORT)) {
229 *data++ = 18; /* length */
230 *data++ = 6; /* type */
231 memcpy(data, &sa6->sin6_addr.s6_addr, sizeof(sa6->sin6_addr.s6_addr));
232 data += sizeof(sa6->sin6_addr.s6_addr);
235 /* ip address + port */
236 *data++ = 20; /* length */
237 *data++ = 7; /* type*/
238 memcpy(data, &sa6->sin6_addr.s6_addr, sizeof(sa6->sin6_addr.s6_addr));
239 data += sizeof(sa6->sin6_addr.s6_addr);
240 memcpy(data, &sa6->sin6_port, sizeof(sa6->sin6_port));
241 data += sizeof(sa6->sin6_port);
248 /* handle DNS names */
249 if (options->fqdn && dsi) {
250 size_t len = strlen(options->fqdn);
251 if ( len + 2 + addresses_len < maxstatuslen - offset) {
254 memcpy(data, options->fqdn, len);
256 addresses_len += len+2;
259 /* Annouce support for SSH tunneled AFP session,
260 * this feature is available since 10.3.2.
261 * According to the specs (AFP 3.1 p.225) this should
262 * be an IP+Port style value, but it only works with
263 * a FQDN. OSX Server uses FQDN as well.
265 if ( len + 2 + addresses_len < maxstatuslen - offset) {
266 if (options->flags & OPTION_ANNOUNCESSH) {
269 memcpy(data, options->fqdn, len);
277 const struct sockaddr_at *ddpaddr = atp_sockaddr(asp->asp_atp);
281 *data++ = 0x03; /* ddp address */
282 memcpy(data, &ddpaddr->sat_addr.s_net, sizeof(ddpaddr->sat_addr.s_net));
283 data += sizeof(ddpaddr->sat_addr.s_net);
284 memcpy(data, &ddpaddr->sat_addr.s_node,
285 sizeof(ddpaddr->sat_addr.s_node));
286 data += sizeof(ddpaddr->sat_addr.s_node);
287 memcpy(data, &ddpaddr->sat_port, sizeof(ddpaddr->sat_port));
288 data += sizeof(ddpaddr->sat_port);
290 #endif /* ! NO_DDP */
292 /* calculate/store Directory Services Names offset */
293 offset = htons(data - begin);
294 *servoffset += sizeof(offset);
295 memcpy(begin + *servoffset, &offset, sizeof(offset));
297 /* return length of buffer */
298 return (data - begin);
301 static size_t status_directorynames(char *data, int *diroffset,
303 const struct afp_options *options)
307 memcpy(&offset, data + *diroffset, sizeof(offset));
308 offset = ntohs(offset);
311 /* I can not find documentation of any other purpose for the
312 * DirectoryNames field.
315 * Try to synthesize a principal:
316 * service '/' fqdn '@' realm
318 if (options->k5service && options->k5realm && options->fqdn) {
319 /* should k5princ be utf8 encoded? */
321 char *p = strchr( options->fqdn, ':' );
324 len = strlen( options->k5service )
325 + strlen( options->fqdn )
326 + strlen( options->k5realm );
327 len+=2; /* '/' and '@' */
328 if ( len > 255 || len+2 > maxstatuslen - offset) {
330 LOG ( log_error, logtype_afpd, "status: could not set directory service list, no more room");
333 *data++ = 1; /* DirectoryNamesCount */
335 snprintf( data, len + 1, "%s/%s@%s", options->k5service,
336 options->fqdn, options->k5realm );
345 /* Calculate and store offset for UTF8ServerName */
346 *diroffset += sizeof(u_int16_t);
347 offset = htons(data - begin);
348 memcpy(begin + *diroffset, &offset, sizeof(u_int16_t));
350 /* return length of buffer */
351 return (data - begin);
354 static size_t status_utf8servername(char *data, int *nameoffset,
356 const struct afp_options *options)
358 char *Obj, *Type, *Zone;
362 u_int16_t offset, status;
364 memcpy(&offset, data + *nameoffset, sizeof(offset));
365 offset = ntohs(offset);
369 * What is the valid character range for an nbpname?
371 * Apple's server likes to use the non-qualified hostname
372 * This obviously won't work very well if multiple servers are running
376 /* extract the obj part of the server */
377 Obj = (char *) (options->server ? options->server : options->hostname);
378 nbp_name(options->server ? options->server : options->hostname, &Obj, &Type, &Zone);
380 if ((size_t) -1 == (len = convert_string (
381 options->unixcharset, CH_UTF8_MAC,
382 Obj, -1, data+sizeof(namelen), maxstatuslen-offset )) ) {
383 LOG ( log_error, logtype_afpd, "Could not set utf8 servername");
385 /* set offset to 0 */
386 memset(begin + *nameoffset, 0, sizeof(offset));
387 data = begin + offset;
390 namelen = htons(len);
391 memcpy( data, &namelen, sizeof(namelen));
392 data += sizeof(namelen);
394 offset = htons(offset);
395 memcpy(begin + *nameoffset, &offset, sizeof(u_int16_t));
397 /* Now set the flag ... */
398 memcpy(&status, begin + AFPSTATUS_FLAGOFF, sizeof(status));
399 status = ntohs(status);
400 status |= AFPSRVRINFO_SRVUTF8;
401 status = htons(status);
402 memcpy(begin + AFPSTATUS_FLAGOFF, &status, sizeof(status));
405 /* return length of buffer */
406 return (data - begin);
410 /* returns actual offset to signature */
411 static void status_icon(char *data, const unsigned char *icondata,
412 const int iconlen, const int sigoffset)
415 char *sigdata = data + sigoffset;
416 u_int16_t ret, status;
418 memcpy(&status, start + AFPSTATUS_ICONOFF, sizeof(status));
419 if ( icondata == NULL ) {
421 memset(start + AFPSTATUS_ICONOFF, 0, sizeof(status));
423 data += ntohs( status );
424 memcpy( data, icondata, iconlen);
426 ret = htons(data - start);
429 /* put in signature offset */
431 memcpy(sigdata, &ret, sizeof(ret));
434 /* ---------------------
436 void status_init(AFPConfig *aspconfig, AFPConfig *dsiconfig,
437 const struct afp_options *options)
445 if (!(aspconfig || dsiconfig) || !options)
449 status = aspconfig->status;
450 maxstatuslen=sizeof(aspconfig->status);
451 asp = aspconfig->obj.handle;
457 status = dsiconfig->status;
458 maxstatuslen=sizeof(dsiconfig->status);
459 dsi = dsiconfig->obj.handle;
460 if (dsi->server.ss_family == AF_INET) { /* IPv4 */
461 const struct sockaddr_in *sa4 = (struct sockaddr_in *)&dsi->server;
462 ipok = sa4->sin_addr.s_addr ? 1 : 0;
464 const struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&dsi->server;
465 for (int i=0; i<16; i++) {
466 if (sa6->sin6_addr.s6_addr[i]) {
476 * These routines must be called in order -- earlier calls
477 * set the offsets for later calls.
479 * using structs is a bad idea, but that's what the original code
480 * does. solaris, in fact, will segfault with them. so, now
481 * we just use the powers of #defines and memcpy.
483 * reply block layout (offsets are 16-bit quantities):
484 * machine type offset -> AFP version count offset ->
485 * UAM count offset -> vol icon/mask offset -> flags ->
487 * server name [padded to even boundary] -> signature offset ->
488 * network address offset ->
490 * at the appropriate offsets:
491 * machine type, afp versions, uams, server signature
492 * (16-bytes), network addresses, volume icon/mask
496 options->server_notif,
497 (options->fqdn || ipok),
499 (options->k5service && options->k5realm && options->fqdn),
501 /* returns offset to signature offset */
502 c = status_server(status, options->server ? options->server :
503 options->hostname, options);
504 status_machine(status);
505 status_versions(status, asp, dsi);
506 status_uams(status, options->uamlist);
507 if (options->flags & OPTION_CUSTOMICON)
508 status_icon(status, icon, sizeof(icon), c);
510 status_icon(status, apple_atalk_icon, sizeof(apple_atalk_icon), c);
512 sigoff = status_signature(status, &c, options);
513 /* c now contains the offset where the netaddress offset lives */
515 status_netaddress(status, &c, asp, dsi, options);
516 /* c now contains the offset where the Directory Names Count offset lives */
518 statuslen = status_directorynames(status, &c, dsi, options);
519 /* c now contains the offset where the UTF-8 ServerName offset lives */
521 if ( statuslen < maxstatuslen)
522 statuslen = status_utf8servername(status, &c, dsi, options);
526 if (dsiconfig) /* status is dsiconfig->status */
527 memcpy(aspconfig->status, status, statuslen);
528 asp_setstatus(asp, status, statuslen);
529 aspconfig->signature = status + sigoff;
530 aspconfig->statuslen = statuslen;
532 #endif /* ! NO_DDP */
535 if ((options->flags & OPTION_CUSTOMICON) == 0) {
536 status_icon(status, apple_tcp_icon, sizeof(apple_tcp_icon), 0);
538 dsi_setstatus(dsi, status, statuslen);
539 dsiconfig->signature = status + sigoff;
540 dsiconfig->statuslen = statuslen;
544 /* set_signature() */
546 /* If found in conf file, use it. */
547 /* If not found in conf file, genarate and append in conf file. */
548 /* If conf file don't exist, create and genarate. */
549 /* If cannot open conf file, use one-time signature. */
550 /* If -signature user:xxxxx, use it. */
552 void set_signature(struct afp_options *options) {
556 char *servername_conf;
559 FILE *fp = NULL, *randomp;
563 server_tmp = (options->server ? options->server : options->hostname);
564 if (strcmp(options->signatureopt, "auto") == 0) {
565 goto server_signature_auto; /* default */
566 } else if (strcmp(options->signatureopt, "host") == 0) {
567 LOG(log_warning, logtype_afpd, "WARNING: option \"-signature host\" is obsoleted. Switching back to auto.", options->signatureopt);
568 goto server_signature_auto; /* same as auto */
569 } else if (strncmp(options->signatureopt, "user", 4) == 0) {
570 goto server_signature_user; /* user string */
572 LOG(log_error, logtype_afpd, "ERROR: option \"-signature %s\" is not valid. Switching back to auto.", options->signatureopt);
573 goto server_signature_auto; /* switch back to auto*/
576 server_signature_user:
578 /* Signature type is user string */
579 len = strlen(options->signatureopt);
581 LOG(log_warning, logtype_afpd, "WARNING: option \"-signature %s\" is not valid. Switching back to auto.", options->signatureopt);
582 goto server_signature_auto;
584 usersign = options->signatureopt + 5;
587 LOG(log_warning, logtype_afpd, "WARNING: signature user string %s is very long !", usersign);
589 } else if (len >= 3) {
590 LOG(log_info, logtype_afpd, "signature user string is %s.", usersign);
592 LOG(log_warning, logtype_afpd, "WARNING: signature user string %s is very short !", usersign);
594 memset(options->signature, 0, 16);
595 memcpy(options->signature, usersign, len);
596 goto server_signature_done;
598 server_signature_auto:
600 /* Signature type is auto, using afp_signature.conf */
601 if (!stat(options->sigconffile, &tmpstat)) { /* conf file exists? */
602 if ((fp = fopen(options->sigconffile, "r")) != NULL) { /* read open? */
603 /* scan in the conf file */
604 while (fgets(buf, sizeof(buf), fp) != NULL) {
606 while (p && isblank(*p))
608 if (!p || (*p == '#') || (*p == '\n'))
609 continue; /* invalid line */
612 if ((servername_conf = strtok( p, "\"" )) == NULL)
613 continue; /* syntax error: invalid quoted servername */
615 if ((servername_conf = strtok( p, " \t" )) == NULL)
616 continue; /* syntax error: invalid servername */
621 continue; /* syntax error: missing signature */
623 if (strcmp(server_tmp, servername_conf))
624 continue; /* another servername */
626 while (p && isblank(*p))
628 if ( 16 == sscanf(p, "%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX",
629 &options->signature[ 0], &options->signature[ 1],
630 &options->signature[ 2], &options->signature[ 3],
631 &options->signature[ 4], &options->signature[ 5],
632 &options->signature[ 6], &options->signature[ 7],
633 &options->signature[ 8], &options->signature[ 9],
634 &options->signature[10], &options->signature[11],
635 &options->signature[12], &options->signature[13],
636 &options->signature[14], &options->signature[15]
639 goto server_signature_done; /* found in conf file */
642 if ((fp = freopen(options->sigconffile, "a+", fp)) != NULL) { /* append because not found */
643 fseek(fp, 0L, SEEK_END);
644 if(ftell(fp) == 0) { /* size = 0 */
646 goto server_signature_random;
648 fseek(fp, -1L, SEEK_END);
649 if(fgetc(fp) != '\n') fputc('\n', fp); /* last char is \n? */
650 goto server_signature_random;
653 LOG(log_error, logtype_afpd, "ERROR: Cannot write in %s (%s). Using one-time signature.",
654 options->sigconffile, strerror(errno));
655 goto server_signature_random;
658 LOG(log_error, logtype_afpd, "ERROR: Cannot read %s (%s). Using one-time signature.",
659 options->sigconffile, strerror(errno));
660 goto server_signature_random;
662 } else { /* conf file don't exist */
663 if (( fd = creat(options->sigconffile, 0644 )) < 0 ) {
664 LOG(log_error, logtype_atalkd, "Cannot create %s (%s). Using one-time signature.",
665 options->sigconffile, strerror(errno));
666 goto server_signature_random;
668 if (( fp = fdopen( fd, "w" )) == NULL ) {
669 LOG(log_error, logtype_atalkd, "Cannot fdopen %s (%s). Using one-time signature.",
670 options->sigconffile, strerror(errno));
672 goto server_signature_random;
675 goto server_signature_random;
678 server_signature_random:
680 /* generate signature from random number */
681 randombytes(options->signature, 16);
683 if (fp && header) { /* conf file is created or size=0 */
684 fprintf(fp, "# DON'T TOUCH NOR COPY THOUGHTLESSLY!\n");
685 fprintf(fp, "# This file is auto-generated by afpd.\n");
687 fprintf(fp, "# ServerSignature is unique identifier used to prevent logging on to\n");
688 fprintf(fp, "# the same server twice.\n");
690 fprintf(fp, "# If setting \"-signature user:xxxxx\" in afpd.conf, this file is not used.\n\n");
694 fprintf(fp, "\"%s\"\t", server_tmp);
695 for (i=0 ; i<16 ; i++) {
696 fprintf(fp, "%02X", (options->signature)[i]);
698 fprintf(fp, "%s", "\n");
702 server_signature_done:
705 LOG(log_info, logtype_afpd,
706 " \"%s\"'s signature is %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
708 (options->signature)[ 0], (options->signature)[ 1],
709 (options->signature)[ 2], (options->signature)[ 3],
710 (options->signature)[ 4], (options->signature)[ 5],
711 (options->signature)[ 6], (options->signature)[ 7],
712 (options->signature)[ 8], (options->signature)[ 9],
713 (options->signature)[10], (options->signature)[11],
714 (options->signature)[12], (options->signature)[13],
715 (options->signature)[14], (options->signature)[15]);
720 /* this is the same as asp/dsi_getstatus */
721 int afp_getsrvrinfo(AFPObj *obj, char *ibuf _U_, size_t ibuflen _U_, char *rbuf, size_t *rbuflen)
723 AFPConfig *config = obj->config;
725 memcpy(rbuf, config->status, config->statuslen);
726 *rbuflen = config->statuslen;