1 /* -*- Mode: C; tab-width: 4 -*-
2 *
3 * Copyright (c) 2002-2006 Apple Computer, Inc. All rights reserved.
4 *
5 * Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
6 * ("Apple") in consideration of your agreement to the following terms, and your
7 * use, installation, modification or redistribution of this Apple software
8 * constitutes acceptance of these terms. If you do not agree with these terms,
9 * please do not use, install, modify or redistribute this Apple software.
10 *
11 * In consideration of your agreement to abide by the following terms, and subject
12 * to these terms, Apple grants you a personal, non-exclusive license, under Apple's
13 * copyrights in this original Apple software (the "Apple Software"), to use,
14 * reproduce, modify and redistribute the Apple Software, with or without
15 * modifications, in source and/or binary forms; provided that if you redistribute
16 * the Apple Software in its entirety and without modifications, you must retain
17 * this notice and the following text and disclaimers in all such redistributions of
18 * the Apple Software. Neither the name, trademarks, service marks or logos of
19 * Apple Computer, Inc. may be used to endorse or promote products derived from the
20 * Apple Software without specific prior written permission from Apple. Except as
21 * expressly stated in this notice, no other rights or licenses, express or implied,
22 * are granted by Apple herein, including but not limited to any patent rights that
23 * may be infringed by your derivative works or by other works in which the Apple
24 * Software may be incorporated.
25 *
26 * The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
27 * WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
28 * WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
30 * COMBINATION WITH YOUR PRODUCTS.
31 *
32 * IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
34 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
36 * OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
37 * (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
38 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Formatting notes:
41 * This code follows the "Whitesmiths style" C indentation rules. Plenty of discussion
42 * on C indentation can be found on the web, such as <http://www.kafejo.com/komp/1tbs.htm>,
43 * but for the sake of brevity here I will say just this: Curly braces are not syntactially
44 * part of an "if" statement; they are the beginning and ending markers of a compound statement;
45 * therefore common sense dictates that if they are part of a compound statement then they
46 * should be indented to the same level as everything else in that compound statement.
47 * Indenting curly braces at the same level as the "if" implies that curly braces are
48 * part of the "if", which is false. (This is as misleading as people who write "char* x,y;"
49 * thinking that variables x and y are both of type "char*" -- and anyone who doesn't
50 * understand why variable y is not of type "char*" just proves the point that poor code
51 * layout leads people to unfortunate misunderstandings about how the C language really works.)
52
53 To build this tool, copy and paste the following into a command line:
54
55 OS X:
56 gcc dns-sd.c -o dns-sd
57
58 POSIX systems:
59 gcc dns-sd.c -o dns-sd -I../mDNSShared -ldns_sd
60
61 Windows:
62 cl dns-sd.c -I../mDNSShared -DNOT_HAVE_GETOPT ws2_32.lib ..\mDNSWindows\DLL\Release\dnssd.lib
63 (may require that you run a Visual Studio script such as vsvars32.bat first)
64 */
65
66 #pragma ident "%Z%%M% %I% %E% SMI"
67
68 // For testing changes to dnssd_clientstub.c, uncomment this line and the #include below
69 // #define __APPLE_API_PRIVATE 1
70
71 #include "dns_sd.h"
72 #include <ctype.h>
73 #include <stdio.h> // For stdout, stderr
74 #include <stdlib.h> // For exit()
75 #include <string.h> // For strlen(), strcpy(), bzero()
76 #include <errno.h> // For errno, EINTR
77 #include <time.h>
78 #include <sys/types.h> // For u_char
79
80 #ifdef _WIN32
81 #include <winsock2.h>
82 #include <ws2tcpip.h>
83 #include <process.h>
84 typedef int pid_t;
85 #define getpid _getpid
86 #define strcasecmp _stricmp
87 #define snprintf _snprintf
88 static const char kFilePathSep = '\\';
89 #else
90 #include <unistd.h> // For getopt() and optind
91 #include <netdb.h> // For getaddrinfo()
92 #include <sys/time.h> // For struct timeval
93 #include <sys/socket.h> // For AF_INET
94 #include <netinet/in.h> // For struct sockaddr_in()
95 #include <arpa/inet.h> // For inet_addr()
96 static const char kFilePathSep = '/';
97 #endif
98
99 //#include "../mDNSShared/dnssd_clientstub.c"
100
101 //*************************************************************************************************************
102 // Globals
103
104 typedef union { unsigned char b[2]; unsigned short NotAnInteger; } Opaque16;
105
106 static int operation;
107 static uint32_t opinterface = kDNSServiceInterfaceIndexAny;
108 static DNSServiceRef client = NULL;
109 static DNSServiceRef client2 = NULL;
110 static int num_printed;
111 static char addtest = 0;
112 static DNSRecordRef record = NULL;
113 static char myhinfoW[14] = "\002PC\012Windows XP";
114 static char myhinfoX[ 9] = "\003Mac\004OS X";
115 static char updatetest[3] = "\002AA";
116 static char bigNULL[8200];
117
118 // Note: the select() implementation on Windows (Winsock2) fails with any timeout much larger than this
119 #define LONG_TIME 100000000
120
121 static volatile int stopNow = 0;
122 static volatile int timeOut = LONG_TIME;
123
124 //*************************************************************************************************************
125 // Supporting Utility Function
126
GetRRType(const char * s)127 static uint16_t GetRRType(const char *s)
128 {
129 if (!strcasecmp(s, "A" )) return(kDNSServiceType_A);
130 else if (!strcasecmp(s, "NS" )) return(kDNSServiceType_NS);
131 else if (!strcasecmp(s, "MD" )) return(kDNSServiceType_MD);
132 else if (!strcasecmp(s, "MF" )) return(kDNSServiceType_MF);
133 else if (!strcasecmp(s, "CNAME" )) return(kDNSServiceType_CNAME);
134 else if (!strcasecmp(s, "SOA" )) return(kDNSServiceType_SOA);
135 else if (!strcasecmp(s, "MB" )) return(kDNSServiceType_MB);
136 else if (!strcasecmp(s, "MG" )) return(kDNSServiceType_MG);
137 else if (!strcasecmp(s, "MR" )) return(kDNSServiceType_MR);
138 else if (!strcasecmp(s, "NULL" )) return(kDNSServiceType_NULL);
139 else if (!strcasecmp(s, "WKS" )) return(kDNSServiceType_WKS);
140 else if (!strcasecmp(s, "PTR" )) return(kDNSServiceType_PTR);
141 else if (!strcasecmp(s, "HINFO" )) return(kDNSServiceType_HINFO);
142 else if (!strcasecmp(s, "MINFO" )) return(kDNSServiceType_MINFO);
143 else if (!strcasecmp(s, "MX" )) return(kDNSServiceType_MX);
144 else if (!strcasecmp(s, "TXT" )) return(kDNSServiceType_TXT);
145 else if (!strcasecmp(s, "RP" )) return(kDNSServiceType_RP);
146 else if (!strcasecmp(s, "AFSDB" )) return(kDNSServiceType_AFSDB);
147 else if (!strcasecmp(s, "X25" )) return(kDNSServiceType_X25);
148 else if (!strcasecmp(s, "ISDN" )) return(kDNSServiceType_ISDN);
149 else if (!strcasecmp(s, "RT" )) return(kDNSServiceType_RT);
150 else if (!strcasecmp(s, "NSAP" )) return(kDNSServiceType_NSAP);
151 else if (!strcasecmp(s, "NSAP_PTR")) return(kDNSServiceType_NSAP_PTR);
152 else if (!strcasecmp(s, "SIG" )) return(kDNSServiceType_SIG);
153 else if (!strcasecmp(s, "KEY" )) return(kDNSServiceType_KEY);
154 else if (!strcasecmp(s, "PX" )) return(kDNSServiceType_PX);
155 else if (!strcasecmp(s, "GPOS" )) return(kDNSServiceType_GPOS);
156 else if (!strcasecmp(s, "AAAA" )) return(kDNSServiceType_AAAA);
157 else if (!strcasecmp(s, "LOC" )) return(kDNSServiceType_LOC);
158 else if (!strcasecmp(s, "NXT" )) return(kDNSServiceType_NXT);
159 else if (!strcasecmp(s, "EID" )) return(kDNSServiceType_EID);
160 else if (!strcasecmp(s, "NIMLOC" )) return(kDNSServiceType_NIMLOC);
161 else if (!strcasecmp(s, "SRV" )) return(kDNSServiceType_SRV);
162 else if (!strcasecmp(s, "ATMA" )) return(kDNSServiceType_ATMA);
163 else if (!strcasecmp(s, "NAPTR" )) return(kDNSServiceType_NAPTR);
164 else if (!strcasecmp(s, "KX" )) return(kDNSServiceType_KX);
165 else if (!strcasecmp(s, "CERT" )) return(kDNSServiceType_CERT);
166 else if (!strcasecmp(s, "A6" )) return(kDNSServiceType_A6);
167 else if (!strcasecmp(s, "DNAME" )) return(kDNSServiceType_DNAME);
168 else if (!strcasecmp(s, "SINK" )) return(kDNSServiceType_SINK);
169 else if (!strcasecmp(s, "OPT" )) return(kDNSServiceType_OPT);
170 else if (!strcasecmp(s, "TKEY" )) return(kDNSServiceType_TKEY);
171 else if (!strcasecmp(s, "TSIG" )) return(kDNSServiceType_TSIG);
172 else if (!strcasecmp(s, "IXFR" )) return(kDNSServiceType_IXFR);
173 else if (!strcasecmp(s, "AXFR" )) return(kDNSServiceType_AXFR);
174 else if (!strcasecmp(s, "MAILB" )) return(kDNSServiceType_MAILB);
175 else if (!strcasecmp(s, "MAILA" )) return(kDNSServiceType_MAILA);
176 else if (!strcasecmp(s, "ANY" )) return(kDNSServiceType_ANY);
177 else return(atoi(s));
178 }
179
180 //*************************************************************************************************************
181 // Sample callback functions for each of the operation types
182
printtimestamp(void)183 static void printtimestamp(void)
184 {
185 struct tm tm;
186 int ms;
187 #ifdef _WIN32
188 SYSTEMTIME sysTime;
189 time_t uct = time(NULL);
190 tm = *localtime(&uct);
191 GetLocalTime(&sysTime);
192 ms = sysTime.wMilliseconds;
193 #else
194 struct timeval tv;
195 gettimeofday(&tv, NULL);
196 localtime_r((time_t*)&tv.tv_sec, &tm);
197 ms = tv.tv_usec/1000;
198 #endif
199 printf("%2d:%02d:%02d.%03d ", tm.tm_hour, tm.tm_min, tm.tm_sec, ms);
200 }
201
202 #define DomainMsg(X) (((X) & kDNSServiceFlagsDefault) ? "(Default)" : \
203 ((X) & kDNSServiceFlagsAdd) ? "Added" : "Removed")
204
GetNextLabel(const char * cstr,char label[64])205 static const char *GetNextLabel(const char *cstr, char label[64])
206 {
207 char *ptr = label;
208 while (*cstr && *cstr != '.') // While we have characters in the label...
209 {
210 char c = *cstr++;
211 if (c == '\\')
212 {
213 c = *cstr++;
214 if (isdigit(cstr[-1]) && isdigit(cstr[0]) && isdigit(cstr[1]))
215 {
216 int v0 = cstr[-1] - '0'; // then interpret as three-digit decimal
217 int v1 = cstr[ 0] - '0';
218 int v2 = cstr[ 1] - '0';
219 int val = v0 * 100 + v1 * 10 + v2;
220 if (val <= 255) { c = (char)val; cstr += 2; } // If valid three-digit decimal value, use it
221 }
222 }
223 *ptr++ = c;
224 if (ptr >= label+64) return(NULL);
225 }
226 if (*cstr) cstr++; // Skip over the trailing dot (if present)
227 *ptr++ = 0;
228 return(cstr);
229 }
230
enum_reply(DNSServiceRef client,const DNSServiceFlags flags,uint32_t ifIndex,DNSServiceErrorType errorCode,const char * replyDomain,void * context)231 static void DNSSD_API enum_reply(DNSServiceRef client, const DNSServiceFlags flags, uint32_t ifIndex,
232 DNSServiceErrorType errorCode, const char *replyDomain, void *context)
233 {
234 DNSServiceFlags partialflags = flags & ~(kDNSServiceFlagsMoreComing | kDNSServiceFlagsAdd | kDNSServiceFlagsDefault);
235 int labels = 0, depth = 0, i, initial = 0;
236 char text[64];
237 const char *label[128];
238
239 (void)client; // Unused
240 (void)ifIndex; // Unused
241 (void)context; // Unused
242
243 // 1. Print the header
244 if (num_printed++ == 0) printf("Timestamp Recommended %s domain\n", operation == 'E' ? "Registration" : "Browsing");
245 printtimestamp();
246 if (errorCode)
247 printf("Error code %d\n", errorCode);
248 else if (!*replyDomain)
249 printf("Error: No reply domain\n");
250 else
251 {
252 printf("%-10s", DomainMsg(flags));
253 printf("%-8s", (flags & kDNSServiceFlagsMoreComing) ? "(More)" : "");
254 if (partialflags) printf("Flags: %4X ", partialflags);
255 else printf(" ");
256
257 // 2. Count the labels
258 while (*replyDomain)
259 {
260 label[labels++] = replyDomain;
261 replyDomain = GetNextLabel(replyDomain, text);
262 }
263
264 // 3. Decide if we're going to clump the last two or three labels (e.g. "apple.com", or "nicta.com.au")
265 if (labels >= 3 && replyDomain - label[labels-1] <= 3 && label[labels-1] - label[labels-2] <= 4) initial = 3;
266 else if (labels >= 2 && replyDomain - label[labels-1] <= 4) initial = 2;
267 else initial = 1;
268 labels -= initial;
269
270 // 4. Print the initial one-, two- or three-label clump
271 for (i=0; i<initial; i++)
272 {
273 GetNextLabel(label[labels+i], text);
274 if (i>0) printf(".");
275 printf("%s", text);
276 }
277 printf("\n");
278
279 // 5. Print the remainder of the hierarchy
280 for (depth=0; depth<labels; depth++)
281 {
282 printf(" ");
283 for (i=0; i<=depth; i++) printf("- ");
284 GetNextLabel(label[labels-1-depth], text);
285 printf("> %s\n", text);
286 }
287 }
288
289 if (!(flags & kDNSServiceFlagsMoreComing)) fflush(stdout);
290 }
291
browse_reply(DNSServiceRef client,const DNSServiceFlags flags,uint32_t ifIndex,DNSServiceErrorType errorCode,const char * replyName,const char * replyType,const char * replyDomain,void * context)292 static void DNSSD_API browse_reply(DNSServiceRef client, const DNSServiceFlags flags, uint32_t ifIndex, DNSServiceErrorType errorCode,
293 const char *replyName, const char *replyType, const char *replyDomain, void *context)
294 {
295 char *op = (flags & kDNSServiceFlagsAdd) ? "Add" : "Rmv";
296 (void)client; // Unused
297 (void)context; // Unused
298 if (num_printed++ == 0) printf("Timestamp A/R Flags if %-25s %-25s %s\n", "Domain", "Service Type", "Instance Name");
299 printtimestamp();
300 if (errorCode) printf("Error code %d\n", errorCode);
301 else printf("%s%6X%3d %-25s %-25s %s\n", op, flags, ifIndex, replyDomain, replyType, replyName);
302 if (!(flags & kDNSServiceFlagsMoreComing)) fflush(stdout);
303 }
304
ShowTXTRecord(uint16_t txtLen,const unsigned char * txtRecord)305 static void ShowTXTRecord(uint16_t txtLen, const unsigned char *txtRecord)
306 {
307 const unsigned char *ptr = txtRecord;
308 const unsigned char *max = txtRecord + txtLen;
309 while (ptr < max)
310 {
311 const unsigned char *const end = ptr + 1 + ptr[0];
312 if (end > max) { printf("<< invalid data >>"); break; }
313 if (++ptr < end) printf(" "); // As long as string is non-empty, begin with a space
314 while (ptr<end)
315 {
316 // We'd like the output to be shell-friendly, so that it can be copied and pasted unchanged into a "dns-sd -R" command.
317 // However, this is trickier than it seems. Enclosing a string in double quotes doesn't necessarily make it
318 // shell-safe, because shells still expand variables like $foo even when they appear inside quoted strings.
319 // Enclosing a string in single quotes is better, but when using single quotes even backslash escapes are ignored,
320 // meaning there's simply no way to represent a single quote (or apostrophe) inside a single-quoted string.
321 // The only remaining solution is not to surround the string with quotes at all, but instead to use backslash
322 // escapes to encode spaces and all other known shell metacharacters.
323 // (If we've missed any known shell metacharacters, please let us know.)
324 // In addition, non-printing ascii codes (0-31) are displayed as \xHH, using a two-digit hex value.
325 // Because '\' is itself a shell metacharacter (the shell escape character), it has to be escaped as "\\" to survive
326 // the round-trip to the shell and back. This means that a single '\' is represented here as EIGHT backslashes:
327 // The C compiler eats half of them, resulting in four appearing in the output.
328 // The shell parses those four as a pair of "\\" sequences, passing two backslashes to the "dns-sd -R" command.
329 // The "dns-sd -R" command interprets this single "\\" pair as an escaped literal backslash. Sigh.
330 if (strchr(" &;`'\"|*?~<>^()[]{}$", *ptr)) printf("\\");
331 if (*ptr == '\\') printf("\\\\\\\\");
332 else if (*ptr >= ' ' ) printf("%c", *ptr);
333 else printf("\\\\x%02X", *ptr);
334 ptr++;
335 }
336 }
337 }
338
resolve_reply(DNSServiceRef client,const DNSServiceFlags flags,uint32_t ifIndex,DNSServiceErrorType errorCode,const char * fullname,const char * hosttarget,uint16_t opaqueport,uint16_t txtLen,const unsigned char * txtRecord,void * context)339 static void DNSSD_API resolve_reply(DNSServiceRef client, const DNSServiceFlags flags, uint32_t ifIndex, DNSServiceErrorType errorCode,
340 const char *fullname, const char *hosttarget, uint16_t opaqueport, uint16_t txtLen, const unsigned char *txtRecord, void *context)
341 {
342 union { uint16_t s; u_char b[2]; } port = { opaqueport };
343 uint16_t PortAsNumber = ((uint16_t)port.b[0]) << 8 | port.b[1];
344
345 (void)client; // Unused
346 (void)ifIndex; // Unused
347 (void)context; // Unused
348
349 printtimestamp();
350 if (errorCode) printf("Error code %d\n", errorCode);
351 else
352 {
353 printf("%s can be reached at %s:%u", fullname, hosttarget, PortAsNumber);
354 if (flags) printf(" Flags: %X", flags);
355 // Don't show degenerate TXT records containing nothing but a single empty string
356 if (txtLen > 1) { printf("\n"); ShowTXTRecord(txtLen, txtRecord); }
357 printf("\n");
358 }
359
360 if (!(flags & kDNSServiceFlagsMoreComing)) fflush(stdout);
361 }
362
myTimerCallBack(void)363 static void myTimerCallBack(void)
364 {
365 DNSServiceErrorType err = kDNSServiceErr_Unknown;
366
367 switch (operation)
368 {
369 case 'A':
370 {
371 switch (addtest)
372 {
373 case 0: printf("Adding Test HINFO record\n");
374 err = DNSServiceAddRecord(client, &record, 0, kDNSServiceType_HINFO, sizeof(myhinfoW), &myhinfoW[0], 0);
375 addtest = 1;
376 break;
377 case 1: printf("Updating Test HINFO record\n");
378 err = DNSServiceUpdateRecord(client, record, 0, sizeof(myhinfoX), &myhinfoX[0], 0);
379 addtest = 2;
380 break;
381 case 2: printf("Removing Test HINFO record\n");
382 err = DNSServiceRemoveRecord(client, record, 0);
383 addtest = 0;
384 break;
385 }
386 }
387 break;
388
389 case 'U':
390 {
391 if (updatetest[1] != 'Z') updatetest[1]++;
392 else updatetest[1] = 'A';
393 updatetest[0] = 3 - updatetest[0];
394 updatetest[2] = updatetest[1];
395 printf("Updating Test TXT record to %c\n", updatetest[1]);
396 err = DNSServiceUpdateRecord(client, NULL, 0, 1+updatetest[0], &updatetest[0], 0);
397 }
398 break;
399
400 case 'N':
401 {
402 printf("Adding big NULL record\n");
403 err = DNSServiceAddRecord(client, &record, 0, kDNSServiceType_NULL, sizeof(bigNULL), &bigNULL[0], 0);
404 timeOut = LONG_TIME;
405 }
406 break;
407 }
408
409 if (err != kDNSServiceErr_NoError)
410 {
411 fprintf(stderr, "DNSService call failed %ld\n", (long int)err);
412 stopNow = 1;
413 }
414 }
415
reg_reply(DNSServiceRef client,const DNSServiceFlags flags,DNSServiceErrorType errorCode,const char * name,const char * regtype,const char * domain,void * context)416 static void DNSSD_API reg_reply(DNSServiceRef client, const DNSServiceFlags flags, DNSServiceErrorType errorCode,
417 const char *name, const char *regtype, const char *domain, void *context)
418 {
419 (void)client; // Unused
420 (void)flags; // Unused
421 (void)context; // Unused
422
423 printf("Got a reply for %s.%s%s: ", name, regtype, domain);
424
425 if (errorCode == kDNSServiceErr_NoError)
426 {
427 printf("Name now registered and active\n");
428 if (operation == 'A' || operation == 'U' || operation == 'N') timeOut = 5;
429 }
430 else if (errorCode == kDNSServiceErr_NameConflict)
431 {
432 printf("Name in use, please choose another\n");
433 exit(-1);
434 }
435 else
436 printf("Error %d\n", errorCode);
437
438 if (!(flags & kDNSServiceFlagsMoreComing)) fflush(stdout);
439 }
440
qr_reply(DNSServiceRef sdRef,const DNSServiceFlags flags,uint32_t ifIndex,DNSServiceErrorType errorCode,const char * fullname,uint16_t rrtype,uint16_t rrclass,uint16_t rdlen,const void * rdata,uint32_t ttl,void * context)441 static void DNSSD_API qr_reply(DNSServiceRef sdRef, const DNSServiceFlags flags, uint32_t ifIndex, DNSServiceErrorType errorCode,
442 const char *fullname, uint16_t rrtype, uint16_t rrclass, uint16_t rdlen, const void *rdata, uint32_t ttl, void *context)
443 {
444 char *op = (flags & kDNSServiceFlagsAdd) ? "Add" : "Rmv";
445 const unsigned char *rd = rdata;
446 const unsigned char *end = (const unsigned char *) rdata + rdlen;
447 char rdb[1000];
448 int unknowntype = 0;
449
450 (void)sdRef; // Unused
451 (void)flags; // Unused
452 (void)ifIndex; // Unused
453 (void)ttl; // Unused
454 (void)context; // Unused
455
456 if (num_printed++ == 0) printf("Timestamp A/R Flags if %-30s%4s%4s Rdata\n", "Name", "T", "C");
457 printtimestamp();
458 if (errorCode)
459 printf("Error code %d\n", errorCode);
460 else
461 {
462 switch (rrtype)
463 {
464 case kDNSServiceType_A: sprintf(rdb, "%d.%d.%d.%d", rd[0], rd[1], rd[2], rd[3]); break;
465 case kDNSServiceType_AAAA: sprintf(rdb, "%02X%02X:%02X%02X:%02X%02X:%02X%02X:%02X%02X:%02X%02X:%02X%02X:%02X%02X",
466 rd[0x0], rd[0x1], rd[0x2], rd[0x3], rd[0x4], rd[0x5], rd[0x6], rd[0x7],
467 rd[0x8], rd[0x9], rd[0xA], rd[0xB], rd[0xC], rd[0xD], rd[0xE], rd[0xF]); break;
468 break;
469 default : sprintf(rdb, "%d bytes%s", rdlen, rdlen ? ":" : ""); unknowntype = 1; break;
470 }
471
472 printf("%s%6X%3d %-30s%4d%4d %s", op, flags, ifIndex, fullname, rrtype, rrclass, rdb);
473 if (unknowntype) while (rd < end) printf(" %02X", *rd++);
474 printf("\n");
475
476 if (operation == 'C')
477 if (flags & kDNSServiceFlagsAdd)
478 DNSServiceReconfirmRecord(flags, ifIndex, fullname, rrtype, rrclass, rdlen, rdata);
479 }
480
481 if (!(flags & kDNSServiceFlagsMoreComing)) fflush(stdout);
482 }
483
484 //*************************************************************************************************************
485 // The main test function
486
HandleEvents(void)487 static void HandleEvents(void)
488 {
489 int dns_sd_fd = client ? DNSServiceRefSockFD(client ) : -1;
490 int dns_sd_fd2 = client2 ? DNSServiceRefSockFD(client2) : -1;
491 int nfds = dns_sd_fd + 1;
492 fd_set readfds;
493 struct timeval tv;
494 int result;
495
496 if (dns_sd_fd2 > dns_sd_fd) nfds = dns_sd_fd2 + 1;
497
498 while (!stopNow)
499 {
500 // 1. Set up the fd_set as usual here.
501 // This example client has no file descriptors of its own,
502 // but a real application would call FD_SET to add them to the set here
503 FD_ZERO(&readfds);
504
505 // 2. Add the fd for our client(s) to the fd_set
506 if (client ) FD_SET(dns_sd_fd , &readfds);
507 if (client2) FD_SET(dns_sd_fd2, &readfds);
508
509 // 3. Set up the timeout.
510 tv.tv_sec = timeOut;
511 tv.tv_usec = 0;
512
513 result = select(nfds, &readfds, (fd_set*)NULL, (fd_set*)NULL, &tv);
514 if (result > 0)
515 {
516 DNSServiceErrorType err = kDNSServiceErr_NoError;
517 if (client && FD_ISSET(dns_sd_fd , &readfds)) err = DNSServiceProcessResult(client );
518 else if (client2 && FD_ISSET(dns_sd_fd2, &readfds)) err = DNSServiceProcessResult(client2);
519 if (err) { fprintf(stderr, "DNSServiceProcessResult returned %d\n", err); stopNow = 1; }
520 }
521 else if (result == 0)
522 myTimerCallBack();
523 else
524 {
525 printf("select() returned %d errno %d %s\n", result, errno, strerror(errno));
526 if (errno != EINTR) stopNow = 1;
527 }
528 }
529 }
530
getfirstoption(int argc,char ** argv,const char * optstr,int * pOptInd)531 static int getfirstoption( int argc, char **argv, const char *optstr, int *pOptInd)
532 // Return the recognized option in optstr and the option index of the next arg.
533 #if NOT_HAVE_GETOPT
534 {
535 int i;
536 for ( i=1; i < argc; i++)
537 {
538 if ( argv[i][0] == '-' && &argv[i][1] &&
539 NULL != strchr( optstr, argv[i][1]))
540 {
541 *pOptInd = i + 1;
542 return argv[i][1];
543 }
544 }
545 return -1;
546 }
547 #else
548 {
549 int operation = getopt(argc, (char * const *)argv, optstr);
550 *pOptInd = optind;
551 return operation;
552 }
553 #endif
554
MyRegisterRecordCallback(DNSServiceRef service,DNSRecordRef record,const DNSServiceFlags flags,DNSServiceErrorType errorCode,void * context)555 static void DNSSD_API MyRegisterRecordCallback(DNSServiceRef service, DNSRecordRef record, const DNSServiceFlags flags,
556 DNSServiceErrorType errorCode, void * context)
557 {
558 char *name = (char *)context;
559
560 (void)service; // Unused
561 (void)record; // Unused
562 (void)flags; // Unused
563
564 printf("Got a reply for %s: ", name);
565 switch (errorCode)
566 {
567 case kDNSServiceErr_NoError: printf("Name now registered and active\n"); break;
568 case kDNSServiceErr_NameConflict: printf("Name in use, please choose another\n"); exit(-1);
569 default: printf("Error %d\n", errorCode); break;
570 }
571 if (!(flags & kDNSServiceFlagsMoreComing)) fflush(stdout);
572 }
573
getip(const char * const name)574 static unsigned long getip(const char *const name)
575 {
576 unsigned long ip = 0;
577 struct addrinfo hints;
578 struct addrinfo * addrs = NULL;
579
580 memset(&hints, 0, sizeof(hints));
581 hints.ai_family = AF_INET;
582
583 if (getaddrinfo(name, NULL, &hints, &addrs) == 0)
584 {
585 ip = ((struct sockaddr_in*) addrs->ai_addr)->sin_addr.s_addr;
586 }
587
588 if (addrs)
589 {
590 freeaddrinfo(addrs);
591 }
592
593 return(ip);
594 }
595
RegisterProxyAddressRecord(DNSServiceRef * sdRef,const char * host,const char * ip)596 static DNSServiceErrorType RegisterProxyAddressRecord(DNSServiceRef *sdRef, const char *host, const char *ip)
597 {
598 // Call getip() after the call DNSServiceCreateConnection().
599 // On the Win32 platform, WinSock must be initialized for getip() to succeed.
600 // Any DNSService* call will initialize WinSock for us, so we make sure
601 // DNSServiceCreateConnection() is called before getip() is.
602 unsigned long addr = 0;
603 DNSServiceErrorType err = DNSServiceCreateConnection(sdRef);
604 if (err) { fprintf(stderr, "DNSServiceCreateConnection returned %d\n", err); return(err); }
605 addr = getip(ip);
606 return(DNSServiceRegisterRecord(*sdRef, &record, kDNSServiceFlagsUnique, kDNSServiceInterfaceIndexAny, host,
607 kDNSServiceType_A, kDNSServiceClass_IN, sizeof(addr), &addr, 240, MyRegisterRecordCallback, (void*)host));
608 // Note, should probably add support for creating proxy AAAA records too, one day
609 }
610
611 #define HexVal(X) ( ((X) >= '0' && (X) <= '9') ? ((X) - '0' ) : \
612 ((X) >= 'A' && (X) <= 'F') ? ((X) - 'A' + 10) : \
613 ((X) >= 'a' && (X) <= 'f') ? ((X) - 'a' + 10) : 0)
614
615 #define HexPair(P) ((HexVal((P)[0]) << 4) | HexVal((P)[1]))
616
RegisterService(DNSServiceRef * sdRef,const char * nam,const char * typ,const char * dom,const char * host,const char * port,int argc,char ** argv)617 static DNSServiceErrorType RegisterService(DNSServiceRef *sdRef,
618 const char *nam, const char *typ, const char *dom, const char *host, const char *port, int argc, char **argv)
619 {
620 uint16_t PortAsNumber = atoi(port);
621 Opaque16 registerPort = { { PortAsNumber >> 8, PortAsNumber & 0xFF } };
622 unsigned char txt[2048] = "";
623 unsigned char *ptr = txt;
624 int i;
625
626 if (nam[0] == '.' && nam[1] == 0) nam = ""; // We allow '.' on the command line as a synonym for empty string
627 if (dom[0] == '.' && dom[1] == 0) dom = ""; // We allow '.' on the command line as a synonym for empty string
628
629 printf("Registering Service %s.%s%s%s", nam[0] ? nam : "<<Default>>", typ, dom[0] ? "." : "", dom);
630 if (host && *host) printf(" host %s", host);
631 printf(" port %s\n", port);
632
633 if (argc)
634 {
635 for (i = 0; i < argc; i++)
636 {
637 const char *p = argv[i];
638 *ptr = 0;
639 while (*p && *ptr < 255 && ptr + 1 + *ptr < txt+sizeof(txt))
640 {
641 if (p[0] != '\\' || p[1] == 0) { ptr[++*ptr] = *p; p+=1; }
642 else if (p[1] == 'x' && isxdigit(p[2]) && isxdigit(p[3])) { ptr[++*ptr] = HexPair(p+2); p+=4; }
643 else { ptr[++*ptr] = p[1]; p+=2; }
644 }
645 ptr += 1 + *ptr;
646 }
647 ShowTXTRecord(ptr-txt, txt);
648 printf("\n");
649 }
650
651 return(DNSServiceRegister(sdRef, /* kDNSServiceFlagsAllowRemoteQuery */ 0, opinterface, nam, typ, dom, host, registerPort.NotAnInteger, (uint16_t) (ptr-txt), txt, reg_reply, NULL));
652 }
653
main(int argc,char ** argv)654 int main(int argc, char **argv)
655 {
656 DNSServiceErrorType err;
657 char *dom;
658 int optind;
659
660 // Extract the program name from argv[0], which by convention contains the path to this executable.
661 // Note that this is just a voluntary convention, not enforced by the kernel --
662 // the process calling exec() can pass bogus data in argv[0] if it chooses to.
663 const char *a0 = strrchr(argv[0], kFilePathSep) + 1;
664 if (a0 == (const char *)1) a0 = argv[0];
665
666 if (argc > 1 && !strcmp(argv[1], "-lo"))
667 {
668 argc--;
669 argv++;
670 opinterface = kDNSServiceInterfaceIndexLocalOnly;
671 printf("Using LocalOnly\n");
672 }
673
674 if (argc > 2 && !strcmp(argv[1], "-i") && atoi(argv[2]))
675 {
676 opinterface = atoi(argv[2]);
677 argc -= 2;
678 argv += 2;
679 printf("Using interface %d\n", opinterface);
680 }
681
682 if (argc < 2) goto Fail; // Minimum command line is the command name and one argument
683 operation = getfirstoption( argc, argv, "EFBLRPQCAUNTMI", &optind);
684 if (operation == -1) goto Fail;
685
686 switch (operation)
687 {
688 case 'E': printf("Looking for recommended registration domains:\n");
689 err = DNSServiceEnumerateDomains(&client, kDNSServiceFlagsRegistrationDomains, opinterface, enum_reply, NULL);
690 break;
691
692 case 'F': printf("Looking for recommended browsing domains:\n");
693 err = DNSServiceEnumerateDomains(&client, kDNSServiceFlagsBrowseDomains, opinterface, enum_reply, NULL);
694 //enum_reply(client, kDNSServiceFlagsAdd, 0, 0, "nicta.com.au.", NULL);
695 //enum_reply(client, kDNSServiceFlagsAdd, 0, 0, "bonjour.nicta.com.au.", NULL);
696 //enum_reply(client, kDNSServiceFlagsAdd, 0, 0, "ibm.com.", NULL);
697 //enum_reply(client, kDNSServiceFlagsAdd, 0, 0, "dns-sd.ibm.com.", NULL);
698 break;
699
700 case 'B': if (argc < optind+1) goto Fail;
701 dom = (argc < optind+2) ? "" : argv[optind+1];
702 if (dom[0] == '.' && dom[1] == 0) dom[0] = 0; // We allow '.' on the command line as a synonym for empty string
703 printf("Browsing for %s%s%s\n", argv[optind+0], dom[0] ? "." : "", dom);
704 err = DNSServiceBrowse(&client, 0, opinterface, argv[optind+0], dom, browse_reply, NULL);
705 break;
706
707 case 'L': if (argc < optind+2) goto Fail;
708 dom = (argc < optind+3) ? "local" : argv[optind+2];
709 if (dom[0] == '.' && dom[1] == 0) dom = "local"; // We allow '.' on the command line as a synonym for "local"
710 printf("Lookup %s.%s.%s\n", argv[optind+0], argv[optind+1], dom);
711 err = DNSServiceResolve(&client, 0, opinterface, argv[optind+0], argv[optind+1], dom, (DNSServiceResolveReply)resolve_reply, NULL);
712 break;
713
714 case 'R': if (argc < optind+4) goto Fail;
715 err = RegisterService(&client, argv[optind+0], argv[optind+1], argv[optind+2], NULL, argv[optind+3], argc-(optind+4), argv+(optind+4));
716 break;
717
718 case 'P': if (argc < optind+6) goto Fail;
719 err = RegisterProxyAddressRecord(&client2, argv[optind+4], argv[optind+5]);
720 if (err) break;
721 err = RegisterService(&client, argv[optind+0], argv[optind+1], argv[optind+2], argv[optind+4], argv[optind+3], argc-(optind+6), argv+(optind+6));
722 break;
723
724 case 'Q':
725 case 'C': {
726 uint16_t rrtype, rrclass;
727 DNSServiceFlags flags = kDNSServiceFlagsReturnCNAME;
728 if (argc < optind+1) goto Fail;
729 rrtype = (argc <= optind+1) ? kDNSServiceType_A : GetRRType(argv[optind+1]);
730 rrclass = (argc <= optind+2) ? kDNSServiceClass_IN : atoi(argv[optind+2]);
731 if (rrtype == kDNSServiceType_TXT || rrtype == kDNSServiceType_PTR) flags |= kDNSServiceFlagsLongLivedQuery;
732 err = DNSServiceQueryRecord(&client, flags, opinterface, argv[optind+0], rrtype, rrclass, qr_reply, NULL);
733 break;
734 }
735
736 case 'A':
737 case 'U':
738 case 'N': {
739 Opaque16 registerPort = { { 0x12, 0x34 } };
740 static const char TXT[] = "\xC" "First String" "\xD" "Second String" "\xC" "Third String";
741 printf("Registering Service Test._testupdate._tcp.local.\n");
742 err = DNSServiceRegister(&client, 0, opinterface, "Test", "_testupdate._tcp.", "", NULL, registerPort.NotAnInteger, sizeof(TXT)-1, TXT, reg_reply, NULL);
743 break;
744 }
745
746 case 'T': {
747 Opaque16 registerPort = { { 0x23, 0x45 } };
748 char TXT[1024];
749 unsigned int i;
750 for (i=0; i<sizeof(TXT); i++)
751 if ((i & 0x1F) == 0) TXT[i] = 0x1F; else TXT[i] = 'A' + (i >> 5);
752 printf("Registering Service Test._testlargetxt._tcp.local.\n");
753 err = DNSServiceRegister(&client, 0, opinterface, "Test", "_testlargetxt._tcp.", "", NULL, registerPort.NotAnInteger, sizeof(TXT), TXT, reg_reply, NULL);
754 break;
755 }
756
757 case 'M': {
758 pid_t pid = getpid();
759 Opaque16 registerPort = { { pid >> 8, pid & 0xFF } };
760 static const char TXT1[] = "\xC" "First String" "\xD" "Second String" "\xC" "Third String";
761 static const char TXT2[] = "\xD" "Fourth String" "\xC" "Fifth String" "\xC" "Sixth String";
762 printf("Registering Service Test._testdualtxt._tcp.local.\n");
763 err = DNSServiceRegister(&client, 0, opinterface, "Test", "_testdualtxt._tcp.", "", NULL, registerPort.NotAnInteger, sizeof(TXT1)-1, TXT1, reg_reply, NULL);
764 if (!err) err = DNSServiceAddRecord(client, &record, 0, kDNSServiceType_TXT, sizeof(TXT2)-1, TXT2, 0);
765 break;
766 }
767
768 case 'I': {
769 pid_t pid = getpid();
770 Opaque16 registerPort = { { pid >> 8, pid & 0xFF } };
771 static const char TXT[] = "\x09" "Test Data";
772 printf("Registering Service Test._testtxt._tcp.local.\n");
773 err = DNSServiceRegister(&client, 0, opinterface, "Test", "_testtxt._tcp.", "", NULL, registerPort.NotAnInteger, 0, NULL, reg_reply, NULL);
774 if (!err) err = DNSServiceUpdateRecord(client, NULL, 0, sizeof(TXT)-1, TXT, 0);
775 break;
776 }
777
778 default: goto Fail;
779 }
780
781 if (!client || err != kDNSServiceErr_NoError) { fprintf(stderr, "DNSService call failed %ld\n", (long int)err); return (-1); }
782 HandleEvents();
783
784 // Be sure to deallocate the DNSServiceRef when you're finished
785 if (client ) DNSServiceRefDeallocate(client );
786 if (client2) DNSServiceRefDeallocate(client2);
787 return 0;
788
789 Fail:
790 fprintf(stderr, "%s -E (Enumerate recommended registration domains)\n", a0);
791 fprintf(stderr, "%s -F (Enumerate recommended browsing domains)\n", a0);
792 fprintf(stderr, "%s -B <Type> <Domain> (Browse for services instances)\n", a0);
793 fprintf(stderr, "%s -L <Name> <Type> <Domain> (Look up a service instance)\n", a0);
794 fprintf(stderr, "%s -R <Name> <Type> <Domain> <Port> [<TXT>...] (Register a service)\n", a0);
795 fprintf(stderr, "%s -P <Name> <Type> <Domain> <Port> <Host> <IP> [<TXT>...] (Proxy)\n", a0);
796 fprintf(stderr, "%s -Q <FQDN> <rrtype> <rrclass> (Generic query for any record type)\n", a0);
797 fprintf(stderr, "%s -C <FQDN> <rrtype> <rrclass> (Query; reconfirming each result)\n", a0);
798 fprintf(stderr, "%s -A (Test Adding/Updating/Deleting a record)\n", a0);
799 fprintf(stderr, "%s -U (Test updating a TXT record)\n", a0);
800 fprintf(stderr, "%s -N (Test adding a large NULL record)\n", a0);
801 fprintf(stderr, "%s -T (Test creating a large TXT record)\n", a0);
802 fprintf(stderr, "%s -M (Test creating a registration with multiple TXT records)\n", a0);
803 fprintf(stderr, "%s -I (Test registering and then immediately updating TXT record)\n", a0);
804 return 0;
805 }
806