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>
38 #include <atalk/util.h>
39 #include <atalk/globals.h>
42 #include "afp_config.h"
45 static size_t maxstatuslen = 0;
47 static void status_flags(char *data, const int notif, const int ipok,
48 const unsigned char passwdbits, const int dirsrvcs _U_, int flags)
52 status = AFPSRVRINFO_COPY
53 | AFPSRVRINFO_SRVSIGNATURE
55 | AFPSRVRINFO_FASTBOZO
58 | AFPSRVRINFO_EXTSLEEP;
60 if (passwdbits & PASSWD_SET) /* some uams may not allow this. */
61 status |= AFPSRVRINFO_PASSWD;
62 if (passwdbits & PASSWD_NOSAVE)
63 status |= AFPSRVRINFO_NOSAVEPASSWD;
64 if (ipok) /* only advertise tcp/ip if we have a valid address */
65 status |= AFPSRVRINFO_TCPIP;
66 if (notif) /* Default is yes */
67 status |= AFPSRVRINFO_SRVNOTIFY;
68 if (flags & OPTION_UUID)
69 status |= AFPSRVRINFO_UUID;
71 status = htons(status);
72 memcpy(data + AFPSTATUS_FLAGOFF, &status, sizeof(status));
75 static int status_server(char *data, const char *server, const struct afp_options *options)
78 char *Obj, *Type, *Zone;
83 /* make room for all offsets before server name */
84 data += AFPSTATUS_PRELEN;
86 /* extract the obj part of the server */
87 Obj = (char *) server;
88 nbp_name(server, &Obj, &Type, &Zone);
89 if ((size_t)-1 == (len = convert_string(
90 options->unixcharset, options->maccharset,
91 Obj, -1, buf, sizeof(buf))) ) {
92 len = MIN(strlen(Obj), 31);
94 memcpy( data, Obj, len );
95 LOG ( log_error, logtype_afpd, "Could not set servername, using fallback");
98 memcpy( data, buf, len );
100 if ((len + 1) & 1) /* pad server name and length byte to even boundary */
104 /* make room for signature and net address offset. save location of
105 * signature offset. we're also making room for directory names offset
106 * and the utf-8 server name offset.
108 * NOTE: technically, we don't need to reserve space for the
109 * signature and net address offsets if they're not going to be
110 * used. as there are no offsets after them, it doesn't hurt to
111 * have them specified though. so, we just do that to simplify
114 * NOTE2: AFP3.1 Documentation states that the directory names offset
115 * is a required feature, even though it can be set to zero.
118 status = htons(len + AFPSTATUS_POSTLEN);
119 memcpy(start + AFPSTATUS_MACHOFF, &status, sizeof(status));
120 return len; /* return the offset to beginning of signature offset */
123 static void status_machine(char *data)
129 const char *machine = "afs";
131 const char *machine = "Netatalk %s";
135 memcpy(&status, start + AFPSTATUS_MACHOFF, sizeof(status));
136 data += ntohs( status );
138 // len = strlen( machine );
139 len = snprintf(buf, 64, machine, VERSION);
141 memcpy( data, buf, len );
144 status = htons(data - start);
145 memcpy(start + AFPSTATUS_VERSOFF, &status, sizeof(status));
148 /* server signature is a 16-byte quantity */
149 static u_int16_t status_signature(char *data, int *servoffset,
150 const struct afp_options *options)
153 u_int16_t offset, sigoff;
157 /* get server signature offset */
158 memcpy(&offset, data + *servoffset, sizeof(offset));
159 sigoff = offset = ntohs(offset);
161 /* jump to server signature offset */
165 memcpy(data, options->signature, 16);
168 /* calculate net address offset */
169 *servoffset += sizeof(offset);
170 offset = htons(data - status);
171 memcpy(status + *servoffset, &offset, sizeof(offset));
175 static size_t status_netaddress(char *data, int *servoffset,
176 const ASP asp, const DSI *dsi,
177 const struct afp_options *options)
181 size_t addresses_len = 0;
185 /* get net address offset */
186 memcpy(&offset, data + *servoffset, sizeof(offset));
187 data += ntohs(offset);
191 len (byte = sizeof(length + address type + address)
192 address type (byte, ip address = 0x01, ip + port = 0x02,
193 ddp address = 0x03, fqdn = 0x04)
194 address (up to 254 bytes, ip = 4, ip + port = 6, ddp = 4)
197 /* number of addresses. this currently screws up if we have a dsi
198 connection, but we don't have the ip address. to get around this,
199 we turn off the status flag for tcp/ip. */
200 *data++ = ((options->fqdn && dsi)? 1 : 0) + (dsi ? 1 : 0) + (asp ? 1 : 0) +
201 (((options->flags & OPTION_ANNOUNCESSH) && options->fqdn && dsi)? 1 : 0);
205 if (dsi->server.ss_family == AF_INET) { /* IPv4 */
206 const struct sockaddr_in *inaddr = (struct sockaddr_in *)&dsi->server;
207 if (inaddr->sin_port == htons(DSI_AFPOVERTCP_PORT)) {
208 *data++ = 6; /* length */
209 *data++ = 0x01; /* basic ip address */
210 memcpy(data, &inaddr->sin_addr.s_addr,
211 sizeof(inaddr->sin_addr.s_addr));
212 data += sizeof(inaddr->sin_addr.s_addr);
215 /* ip address + port */
217 *data++ = 0x02; /* ip address with port */
218 memcpy(data, &inaddr->sin_addr.s_addr,
219 sizeof(inaddr->sin_addr.s_addr));
220 data += sizeof(inaddr->sin_addr.s_addr);
221 memcpy(data, &inaddr->sin_port, sizeof(inaddr->sin_port));
222 data += sizeof(inaddr->sin_port);
226 const struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&dsi->server;
227 if (sa6->sin6_port == htons(DSI_AFPOVERTCP_PORT)) {
228 *data++ = 18; /* length */
229 *data++ = 6; /* type */
230 memcpy(data, &sa6->sin6_addr.s6_addr, sizeof(sa6->sin6_addr.s6_addr));
231 data += sizeof(sa6->sin6_addr.s6_addr);
234 /* ip address + port */
235 *data++ = 20; /* length */
236 *data++ = 7; /* type*/
237 memcpy(data, &sa6->sin6_addr.s6_addr, sizeof(sa6->sin6_addr.s6_addr));
238 data += sizeof(sa6->sin6_addr.s6_addr);
239 memcpy(data, &sa6->sin6_port, sizeof(sa6->sin6_port));
240 data += sizeof(sa6->sin6_port);
247 /* handle DNS names */
248 if (options->fqdn && dsi) {
249 size_t len = strlen(options->fqdn);
250 if ( len + 2 + addresses_len < maxstatuslen - offset) {
253 memcpy(data, options->fqdn, len);
255 addresses_len += len+2;
258 /* Annouce support for SSH tunneled AFP session,
259 * this feature is available since 10.3.2.
260 * According to the specs (AFP 3.1 p.225) this should
261 * be an IP+Port style value, but it only works with
262 * a FQDN. OSX Server uses FQDN as well.
264 if ( len + 2 + addresses_len < maxstatuslen - offset) {
265 if (options->flags & OPTION_ANNOUNCESSH) {
268 memcpy(data, options->fqdn, len);
276 const struct sockaddr_at *ddpaddr = atp_sockaddr(asp->asp_atp);
280 *data++ = 0x03; /* ddp address */
281 memcpy(data, &ddpaddr->sat_addr.s_net, sizeof(ddpaddr->sat_addr.s_net));
282 data += sizeof(ddpaddr->sat_addr.s_net);
283 memcpy(data, &ddpaddr->sat_addr.s_node,
284 sizeof(ddpaddr->sat_addr.s_node));
285 data += sizeof(ddpaddr->sat_addr.s_node);
286 memcpy(data, &ddpaddr->sat_port, sizeof(ddpaddr->sat_port));
287 data += sizeof(ddpaddr->sat_port);
289 #endif /* ! NO_DDP */
291 /* calculate/store Directory Services Names offset */
292 offset = htons(data - begin);
293 *servoffset += sizeof(offset);
294 memcpy(begin + *servoffset, &offset, sizeof(offset));
296 /* return length of buffer */
297 return (data - begin);
300 static size_t status_directorynames(char *data, int *diroffset,
302 const struct afp_options *options)
306 memcpy(&offset, data + *diroffset, sizeof(offset));
307 offset = ntohs(offset);
310 /* I can not find documentation of any other purpose for the
311 * DirectoryNames field.
314 * Try to synthesize a principal:
315 * service '/' fqdn '@' realm
317 if (options->k5service && options->k5realm && options->fqdn) {
318 /* should k5princ be utf8 encoded? */
320 char *p = strchr( options->fqdn, ':' );
323 len = strlen( options->k5service )
324 + strlen( options->fqdn )
325 + strlen( options->k5realm );
326 len+=2; /* '/' and '@' */
327 if ( len > 255 || len+2 > maxstatuslen - offset) {
329 LOG ( log_error, logtype_afpd, "status: could not set directory service list, no more room");
332 *data++ = 1; /* DirectoryNamesCount */
334 snprintf( data, len + 1, "%s/%s@%s", options->k5service,
335 options->fqdn, options->k5realm );
344 /* Calculate and store offset for UTF8ServerName */
345 *diroffset += sizeof(u_int16_t);
346 offset = htons(data - begin);
347 memcpy(begin + *diroffset, &offset, sizeof(u_int16_t));
349 /* return length of buffer */
350 return (data - begin);
353 static size_t status_utf8servername(char *data, int *nameoffset,
355 const struct afp_options *options)
357 char *Obj, *Type, *Zone;
361 u_int16_t offset, status;
363 memcpy(&offset, data + *nameoffset, sizeof(offset));
364 offset = ntohs(offset);
368 * What is the valid character range for an nbpname?
370 * Apple's server likes to use the non-qualified hostname
371 * This obviously won't work very well if multiple servers are running
375 /* extract the obj part of the server */
376 Obj = (char *) (options->server ? options->server : options->hostname);
377 nbp_name(options->server ? options->server : options->hostname, &Obj, &Type, &Zone);
379 if ((size_t) -1 == (len = convert_string (
380 options->unixcharset, CH_UTF8_MAC,
381 Obj, -1, data+sizeof(namelen), maxstatuslen-offset )) ) {
382 LOG ( log_error, logtype_afpd, "Could not set utf8 servername");
384 /* set offset to 0 */
385 memset(begin + *nameoffset, 0, sizeof(offset));
386 data = begin + offset;
389 namelen = htons(len);
390 memcpy( data, &namelen, sizeof(namelen));
391 data += sizeof(namelen);
393 offset = htons(offset);
394 memcpy(begin + *nameoffset, &offset, sizeof(u_int16_t));
397 /* return length of buffer */
398 return (data - begin);
402 /* returns actual offset to signature */
403 static void status_icon(char *data, const unsigned char *icondata,
404 const int iconlen, const int sigoffset)
407 char *sigdata = data + sigoffset;
408 u_int16_t ret, status;
410 memcpy(&status, start + AFPSTATUS_ICONOFF, sizeof(status));
411 if ( icondata == NULL ) {
413 memset(start + AFPSTATUS_ICONOFF, 0, sizeof(status));
415 data += ntohs( status );
416 memcpy( data, icondata, iconlen);
418 ret = htons(data - start);
421 /* put in signature offset */
423 memcpy(sigdata, &ret, sizeof(ret));
426 /* ---------------------
428 void status_init(AFPConfig *aspconfig, AFPConfig *dsiconfig,
429 const struct afp_options *options)
437 if (!(aspconfig || dsiconfig) || !options)
441 status = aspconfig->status;
442 maxstatuslen=sizeof(aspconfig->status);
443 asp = aspconfig->obj.handle;
449 status = dsiconfig->status;
450 maxstatuslen=sizeof(dsiconfig->status);
451 dsi = dsiconfig->obj.handle;
452 if (dsi->server.ss_family == AF_INET) { /* IPv4 */
453 const struct sockaddr_in *sa4 = (struct sockaddr_in *)&dsi->server;
454 ipok = sa4->sin_addr.s_addr ? 1 : 0;
456 const struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&dsi->server;
457 for (int i=0; i<16; i++) {
458 if (sa6->sin6_addr.s6_addr[i]) {
468 * These routines must be called in order -- earlier calls
469 * set the offsets for later calls.
471 * using structs is a bad idea, but that's what the original code
472 * does. solaris, in fact, will segfault with them. so, now
473 * we just use the powers of #defines and memcpy.
475 * reply block layout (offsets are 16-bit quantities):
476 * machine type offset -> AFP version count offset ->
477 * UAM count offset -> vol icon/mask offset -> flags ->
479 * server name [padded to even boundary] -> signature offset ->
480 * network address offset ->
482 * at the appropriate offsets:
483 * machine type, afp versions, uams, server signature
484 * (16-bytes), network addresses, volume icon/mask
488 options->server_notif,
489 (options->fqdn || ipok),
491 (options->k5service && options->k5realm && options->fqdn),
493 /* returns offset to signature offset */
494 c = status_server(status, options->server ? options->server :
495 options->hostname, options);
496 status_machine(status);
497 status_versions(status, asp, dsi);
498 status_uams(status, options->uamlist);
499 if (options->flags & OPTION_CUSTOMICON)
500 status_icon(status, icon, sizeof(icon), c);
502 status_icon(status, apple_atalk_icon, sizeof(apple_atalk_icon), c);
504 sigoff = status_signature(status, &c, options);
505 /* c now contains the offset where the netaddress offset lives */
507 status_netaddress(status, &c, asp, dsi, options);
508 /* c now contains the offset where the Directory Names Count offset lives */
510 statuslen = status_directorynames(status, &c, dsi, options);
511 /* c now contains the offset where the UTF-8 ServerName offset lives */
513 if ( statuslen < maxstatuslen)
514 statuslen = status_utf8servername(status, &c, dsi, options);
518 if (dsiconfig) /* status is dsiconfig->status */
519 memcpy(aspconfig->status, status, statuslen);
520 asp_setstatus(asp, status, statuslen);
521 aspconfig->signature = status + sigoff;
522 aspconfig->statuslen = statuslen;
524 #endif /* ! NO_DDP */
527 if ((options->flags & OPTION_CUSTOMICON) == 0) {
528 status_icon(status, apple_tcp_icon, sizeof(apple_tcp_icon), 0);
530 dsi_setstatus(dsi, status, statuslen);
531 dsiconfig->signature = status + sigoff;
532 dsiconfig->statuslen = statuslen;
536 /* set_signature() */
538 /* If found in conf file, use it. */
539 /* If not found in conf file, genarate and append in conf file. */
540 /* If conf file don't exist, create and genarate. */
541 /* If cannot open conf file, use one-time signature. */
542 /* If -signature user:xxxxx, use it. */
544 void set_signature(struct afp_options *options) {
548 char *servername_conf;
551 FILE *fp = NULL, *randomp;
555 server_tmp = (options->server ? options->server : options->hostname);
556 if (strcmp(options->signatureopt, "auto") == 0) {
557 goto server_signature_auto; /* default */
558 } else if (strcmp(options->signatureopt, "host") == 0) {
559 LOG(log_warning, logtype_afpd, "WARNING: option \"-signature host\" is obsoleted. Switching back to auto.", options->signatureopt);
560 goto server_signature_auto; /* same as auto */
561 } else if (strncmp(options->signatureopt, "user", 4) == 0) {
562 goto server_signature_user; /* user string */
564 LOG(log_error, logtype_afpd, "ERROR: option \"-signature %s\" is not valid. Switching back to auto.", options->signatureopt);
565 goto server_signature_auto; /* switch back to auto*/
568 server_signature_user:
570 /* Signature type is user string */
571 len = strlen(options->signatureopt);
573 LOG(log_warning, logtype_afpd, "WARNING: option \"-signature %s\" is not valid. Switching back to auto.", options->signatureopt);
574 goto server_signature_auto;
576 usersign = options->signatureopt + 5;
579 LOG(log_warning, logtype_afpd, "WARNING: signature user string %s is very long !", usersign);
581 } else if (len >= 3) {
582 LOG(log_info, logtype_afpd, "signature user string is %s.", usersign);
584 LOG(log_warning, logtype_afpd, "WARNING: signature user string %s is very short !", usersign);
586 memset(options->signature, 0, 16);
587 memcpy(options->signature, usersign, len);
588 goto server_signature_done;
590 server_signature_auto:
592 /* Signature type is auto, using afp_signature.conf */
593 if (!stat(options->sigconffile, &tmpstat)) { /* conf file exists? */
594 if ((fp = fopen(options->sigconffile, "r")) != NULL) { /* read open? */
595 /* scan in the conf file */
596 while (fgets(buf, sizeof(buf), fp) != NULL) {
598 while (p && isblank(*p))
600 if (!p || (*p == '#') || (*p == '\n'))
601 continue; /* invalid line */
604 if ((servername_conf = strtok( p, "\"" )) == NULL)
605 continue; /* syntax error: invalid quoted servername */
607 if ((servername_conf = strtok( p, " \t" )) == NULL)
608 continue; /* syntax error: invalid servername */
613 continue; /* syntax error: missing signature */
615 if (strcmp(server_tmp, servername_conf))
616 continue; /* another servername */
618 while (p && isblank(*p))
620 if ( 16 == sscanf(p, "%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX%2hhX",
621 &options->signature[ 0], &options->signature[ 1],
622 &options->signature[ 2], &options->signature[ 3],
623 &options->signature[ 4], &options->signature[ 5],
624 &options->signature[ 6], &options->signature[ 7],
625 &options->signature[ 8], &options->signature[ 9],
626 &options->signature[10], &options->signature[11],
627 &options->signature[12], &options->signature[13],
628 &options->signature[14], &options->signature[15]
631 goto server_signature_done; /* found in conf file */
634 if ((fp = freopen(options->sigconffile, "a+", fp)) != NULL) { /* append because not found */
635 fseek(fp, 0L, SEEK_END);
636 if(ftell(fp) == 0) { /* size = 0 */
638 goto server_signature_random;
640 fseek(fp, -1L, SEEK_END);
641 if(fgetc(fp) != '\n') fputc('\n', fp); /* last char is \n? */
642 goto server_signature_random;
645 LOG(log_error, logtype_afpd, "ERROR: Cannot write in %s (%s). Using one-time signature.",
646 options->sigconffile, strerror(errno));
647 goto server_signature_random;
650 LOG(log_error, logtype_afpd, "ERROR: Cannot read %s (%s). Using one-time signature.",
651 options->sigconffile, strerror(errno));
652 goto server_signature_random;
654 } else { /* conf file don't exist */
655 if (( fd = creat(options->sigconffile, 0644 )) < 0 ) {
656 LOG(log_error, logtype_afpd, "ERROR: Cannot create %s (%s). Using one-time signature.",
657 options->sigconffile, strerror(errno));
658 goto server_signature_random;
660 if (( fp = fdopen( fd, "w" )) == NULL ) {
661 LOG(log_error, logtype_afpd, "ERROR: Cannot fdopen %s (%s). Using one-time signature.",
662 options->sigconffile, strerror(errno));
664 goto server_signature_random;
667 goto server_signature_random;
670 server_signature_random:
672 /* generate signature from random number */
673 randombytes(options->signature, 16);
675 if (fp && header) { /* conf file is created or size=0 */
676 fprintf(fp, "# DON'T TOUCH NOR COPY THOUGHTLESSLY!\n");
677 fprintf(fp, "# This file is auto-generated by afpd.\n");
679 fprintf(fp, "# ServerSignature is unique identifier used to prevent logging on to\n");
680 fprintf(fp, "# the same server twice.\n");
682 fprintf(fp, "# If setting \"-signature user:xxxxx\" in afpd.conf, this file is not used.\n\n");
686 fprintf(fp, "\"%s\"\t", server_tmp);
687 for (i=0 ; i<16 ; i++) {
688 fprintf(fp, "%02X", (options->signature)[i]);
690 fprintf(fp, "%s", "\n");
694 server_signature_done:
697 LOG(log_info, logtype_afpd,
698 " \"%s\"'s signature is %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
700 (options->signature)[ 0], (options->signature)[ 1],
701 (options->signature)[ 2], (options->signature)[ 3],
702 (options->signature)[ 4], (options->signature)[ 5],
703 (options->signature)[ 6], (options->signature)[ 7],
704 (options->signature)[ 8], (options->signature)[ 9],
705 (options->signature)[10], (options->signature)[11],
706 (options->signature)[12], (options->signature)[13],
707 (options->signature)[14], (options->signature)[15]);
712 /* this is the same as asp/dsi_getstatus */
713 int afp_getsrvrinfo(AFPObj *obj, char *ibuf _U_, size_t ibuflen _U_, char *rbuf, size_t *rbuflen)
715 AFPConfig *config = obj->config;
717 memcpy(rbuf, config->status, config->statuslen);
718 *rbuflen = config->statuslen;