18 #ifndef __DNSCOMMON_H_
19 #define __DNSCOMMON_H_
21 #include "mDNSEmbeddedAPI.h"
33 #define STRINGIFY_ARGUMENT_WITHOUT_EXPANSION(s) #s
34 #define STRINGIFY(s) STRINGIFY_ARGUMENT_WITHOUT_EXPANSION(s)
37 #if COMPILER_LIKES_PRAGMA_MARK
38 #pragma mark - DNS Protocol Constants
43 kDNSFlag0_QR_Mask = 0x80,
44 kDNSFlag0_QR_Query = 0x00,
45 kDNSFlag0_QR_Response = 0x80,
47 kDNSFlag0_OP_Mask = 0x78,
48 kDNSFlag0_OP_StdQuery = 0x00,
49 kDNSFlag0_OP_Iquery = 0x08,
50 kDNSFlag0_OP_Status = 0x10,
51 kDNSFlag0_OP_Unused3 = 0x18,
52 kDNSFlag0_OP_Notify = 0x20,
53 kDNSFlag0_OP_Update = 0x28,
55 kDNSFlag0_QROP_Mask = kDNSFlag0_QR_Mask | kDNSFlag0_OP_Mask,
62 kDNSFlag1_Zero = 0x40,
66 kDNSFlag1_RC_Mask = 0x0F,
67 kDNSFlag1_RC_NoErr = 0x00,
68 kDNSFlag1_RC_FormErr = 0x01,
69 kDNSFlag1_RC_ServFail = 0x02,
70 kDNSFlag1_RC_NXDomain = 0x03,
71 kDNSFlag1_RC_NotImpl = 0x04,
72 kDNSFlag1_RC_Refused = 0x05,
73 kDNSFlag1_RC_YXDomain = 0x06,
74 kDNSFlag1_RC_YXRRSet = 0x07,
75 kDNSFlag1_RC_NXRRSet = 0x08,
76 kDNSFlag1_RC_NotAuth = 0x09,
77 kDNSFlag1_RC_NotZone = 0x0A
88 #if COMPILER_LIKES_PRAGMA_MARK
90 #pragma mark - General Utility Functions
96 extern mDNSu32 mDNSRandom(mDNSu32 max);
99 #if COMPILER_LIKES_PRAGMA_MARK
101 #pragma mark - Domain Name Utility Functions
104 #define mDNSIsDigit(X) ((X) >= '0' && (X) <= '9')
105 #define mDNSIsUpperCase(X) ((X) >= 'A' && (X) <= 'Z')
106 #define mDNSIsLowerCase(X) ((X) >= 'a' && (X) <= 'z')
107 #define mDNSIsLetter(X) (mDNSIsUpperCase(X) || mDNSIsLowerCase(X))
109 #define mDNSValidHostChar(X, notfirst, notlast) (mDNSIsLetter(X) || mDNSIsDigit(X) || ((notfirst) && (notlast) && (X) == '-') )
111 extern mDNSu16 CompressedDomainNameLength(
const domainname *
const name,
const domainname *parent);
115 extern mDNSu32 TruncateUTF8ToLength(mDNSu8 *
string, mDNSu32 length, mDNSu32 max);
116 extern mDNSBool LabelContainsSuffix(
const domainlabel *
const name,
const mDNSBool RichText);
117 extern mDNSu32 RemoveLabelSuffix(
domainlabel *name, mDNSBool RichText);
118 extern void AppendLabelSuffix(
domainlabel *
const name, mDNSu32 val,
const mDNSBool RichText);
119 #define ValidateDomainName(N) (DomainNameLength(N) <= MAX_DOMAIN_NAME)
122 #if COMPILER_LIKES_PRAGMA_MARK
124 #pragma mark - Resource Record Utility Functions
141 #define IdenticalResourceRecord(r1,r2) ( \
142 (r1)->rrtype == (r2)->rrtype && \
143 (r1)->rrclass == (r2)->rrclass && \
144 (r1)->namehash == (r2)->namehash && \
145 (r1)->rdlength == (r2)->rdlength && \
146 (r1)->rdatahash == (r2)->rdatahash && \
147 SameRDataBody((r1), &(r2)->rdata->u, SameDomainName) && \
148 SameDomainName((r1)->name, (r2)->name))
150 #define IdenticalSameNameRecord(r1,r2) ( \
151 (r1)->rrtype == (r2)->rrtype && \
152 (r1)->rrclass == (r2)->rrclass && \
153 (r1)->rdlength == (r2)->rdlength && \
154 (r1)->rdatahash == (r2)->rdatahash && \
155 SameRDataBody((r1), &(r2)->rdata->u, SameDomainName))
159 #define RRTypeAnswersQuestionType(R,Q) ((R)->rrtype == kDNSType_CNAME || (R)->rrtype == (Q) || (Q) == kDNSQType_ANY || RRAssertsNonexistence((R),(Q)))
160 #define RRAssertsNonexistence(R,T) ((R)->rrtype == kDNSType_NSEC && (T) < kDNSQType_ANY && !((R)->rdata->u.nsec.bitmap[(T)>>3] & (128 >> ((T)&7))))
163 extern mDNSBool SameRDataBody(
const ResourceRecord *
const r1,
const RDataBody *
const r2, DomainNameComparisonFn *samename);
169 extern mDNSu16 GetRDLength(
const ResourceRecord *
const rr, mDNSBool estimate);
170 extern mDNSBool ValidateRData(
const mDNSu16 rrtype,
const mDNSu16 rdlength,
const RData *
const rd);
172 #define GetRRDomainNameTarget(RR) ( \
173 ((RR)->rrtype == kDNSType_NS || (RR)->rrtype == kDNSType_CNAME || (RR)->rrtype == kDNSType_PTR || (RR)->rrtype == kDNSType_DNAME) ? &(RR)->rdata->u.name : \
174 ((RR)->rrtype == kDNSType_MX || (RR)->rrtype == kDNSType_AFSDB || (RR)->rrtype == kDNSType_RT || (RR)->rrtype == kDNSType_KX ) ? &(RR)->rdata->u.mx.exchange : \
175 ((RR)->rrtype == kDNSType_SRV ) ? &(RR)->rdata->u.srv.target : mDNSNULL )
177 #define LocalRecordReady(X) ((X)->resrec.RecordType != kDNSRecordTypeUnique)
180 #if COMPILER_LIKES_PRAGMA_MARK
182 #pragma mark - DNS Message Creation Functions
186 extern const mDNSu8 *FindCompressionPointer(
const mDNSu8 *
const base,
const mDNSu8 *
const end,
const mDNSu8 *
const domname);
187 extern mDNSu8 *putDomainNameAsLabels(
const DNSMessage *
const msg, mDNSu8 *ptr,
const mDNSu8 *
const limit,
const domainname *
const name);
188 extern mDNSu8 *putRData(
const DNSMessage *
const msg, mDNSu8 *ptr,
const mDNSu8 *
const limit,
const ResourceRecord *
const rr);
193 #define AllowedRRSpace(msg) (((msg)->h.numAnswers || (msg)->h.numAuthorities || (msg)->h.numAdditionals) ? NormalMaxDNSMessageData : AbsoluteMaxDNSMessageData)
195 extern mDNSu8 *PutResourceRecordTTLWithLimit(DNSMessage *
const msg, mDNSu8 *ptr, mDNSu16 *count,
ResourceRecord *rr, mDNSu32 ttl,
const mDNSu8 *limit);
197 #define PutResourceRecordTTL(msg, ptr, count, rr, ttl) \
198 PutResourceRecordTTLWithLimit((msg), (ptr), (count), (rr), (ttl), (msg)->data + AllowedRRSpace(msg))
200 #define PutResourceRecordTTLJumbo(msg, ptr, count, rr, ttl) \
201 PutResourceRecordTTLWithLimit((msg), (ptr), (count), (rr), (ttl), (msg)->data + AbsoluteMaxDNSMessageData)
203 #define PutResourceRecord(MSG, P, C, RR) PutResourceRecordTTL((MSG), (P), (C), (RR), (RR)->rroriginalttl)
207 #define PutRR_OS_TTL(ptr, count, rr, ttl) \
208 PutResourceRecordTTLWithLimit(&m->omsg, (ptr), (count), (rr), (ttl), m->omsg.data + AllowedRRSpace(&m->omsg) - OwnerRecordSpace)
210 #define PutRR_OS(P, C, RR) PutRR_OS_TTL((P), (C), (RR), (RR)->rroriginalttl)
212 extern mDNSu8 *putQuestion(DNSMessage *
const msg, mDNSu8 *ptr,
const mDNSu8 *
const limit,
const domainname *
const name, mDNSu16 rrtype, mDNSu16 rrclass);
213 extern mDNSu8 *putZone(DNSMessage *
const msg, mDNSu8 *ptr, mDNSu8 *limit,
const domainname *zone,
mDNSOpaque16 zoneClass);
214 extern mDNSu8 *putPrereqNameNotInUse(
const domainname *
const name, DNSMessage *
const msg, mDNSu8 *
const ptr, mDNSu8 *
const end);
215 extern mDNSu8 *putDeletionRecord(DNSMessage *msg, mDNSu8 *ptr,
ResourceRecord *rr);
216 extern mDNSu8 *putDeletionRecordWithLimit(DNSMessage *msg, mDNSu8 *ptr,
ResourceRecord *rr, mDNSu8 *limit);
217 extern mDNSu8 *putDeleteRRSetWithLimit(DNSMessage *msg, mDNSu8 *ptr,
const domainname *name, mDNSu16 rrtype, mDNSu8 *limit);
218 extern mDNSu8 *putDeleteAllRRSets(DNSMessage *msg, mDNSu8 *ptr,
const domainname *name);
219 extern mDNSu8 *putUpdateLease(DNSMessage *msg, mDNSu8 *end, mDNSu32 lease);
220 extern mDNSu8 *putUpdateLeaseWithLimit(DNSMessage *msg, mDNSu8 *ptr, mDNSu32 lease, mDNSu8 *limit);
222 extern mDNSu8 *putHINFO(
const mDNS *
const m, DNSMessage *
const msg, mDNSu8 *ptr,
DomainAuthInfo *authInfo, mDNSu8 *limit);
225 #if COMPILER_LIKES_PRAGMA_MARK
227 #pragma mark - DNS Message Parsing Functions
230 #define AuthHashSlot(X) (DomainNameHashValue(X) % AUTH_HASH_SLOTS)
231 #define HashSlot(X) (DomainNameHashValue(X) % CACHE_HASH_SLOTS)
232 extern mDNSu32 DomainNameHashValue(
const domainname *
const name);
234 extern const mDNSu8 *skipDomainName(
const DNSMessage *
const msg,
const mDNSu8 *ptr,
const mDNSu8 *
const end);
235 extern const mDNSu8 *getDomainName(
const DNSMessage *
const msg,
const mDNSu8 *ptr,
const mDNSu8 *
const end,
237 extern const mDNSu8 *skipResourceRecord(
const DNSMessage *msg,
const mDNSu8 *ptr,
const mDNSu8 *end);
238 extern const mDNSu8 *GetLargeResourceRecord(
mDNS *
const m,
const DNSMessage *
const msg,
const mDNSu8 *ptr,
240 extern const mDNSu8 *skipQuestion(
const DNSMessage *msg,
const mDNSu8 *ptr,
const mDNSu8 *end);
241 extern const mDNSu8 *getQuestion(
const DNSMessage *msg,
const mDNSu8 *ptr,
const mDNSu8 *end,
const mDNSInterfaceID InterfaceID,
243 extern const mDNSu8 *LocateAnswers(
const DNSMessage *
const msg,
const mDNSu8 *
const end);
244 extern const mDNSu8 *LocateAuthorities(
const DNSMessage *
const msg,
const mDNSu8 *
const end);
245 extern const mDNSu8 *LocateAdditionals(
const DNSMessage *
const msg,
const mDNSu8 *
const end);
246 extern const mDNSu8 *LocateOptRR(
const DNSMessage *
const msg,
const mDNSu8 *
const end,
int minsize);
247 extern const rdataOPT *GetLLQOptData(
mDNS *
const m,
const DNSMessage *
const msg,
const mDNSu8 *
const end);
248 extern mDNSu32 GetPktLease(
mDNS *m, DNSMessage *msg,
const mDNSu8 *end);
249 extern void DumpPacket(
mDNS *
const m, mStatus status, mDNSBool sent,
char *transport,
251 const mDNSAddr *dstaddr,
mDNSIPPort dstport,
const DNSMessage *
const msg,
const mDNSu8 *
const end);
254 #if COMPILER_LIKES_PRAGMA_MARK
256 #pragma mark - Packet Sending Functions
259 extern mStatus mDNSSendDNSMessage(
mDNS *
const m, DNSMessage *
const msg, mDNSu8 *end,
263 #if COMPILER_LIKES_PRAGMA_MARK
265 #pragma mark - RR List Management & Task Management
268 extern void ShowTaskSchedulingError(
mDNS *
const m);
269 extern void mDNS_Lock_(
mDNS *
const m,
const char *
const functionname);
270 extern void mDNS_Unlock_(
mDNS *
const m,
const char *
const functionname);
273 #define __func__ __FUNCTION__
277 #define __func__ __FUNCTION__
280 #define mDNS_Lock(X) mDNS_Lock_((X), __func__)
282 #define mDNS_Unlock(X) mDNS_Unlock_((X), __func__)
284 #define mDNS_DropLockBeforeCallback() do { m->mDNS_reentrancy++; \
285 if (m->mDNS_busy != m->mDNS_reentrancy) LogMsg("%s: Locking Failure! mDNS_busy (%ld) != mDNS_reentrancy (%ld)", __func__, m->mDNS_busy, m->mDNS_reentrancy); \
288 #define mDNS_ReclaimLockAfterCallback() do { \
289 if (m->mDNS_busy != m->mDNS_reentrancy) LogMsg("%s: Unlocking Failure! mDNS_busy (%ld) != mDNS_reentrancy (%ld)", __func__, m->mDNS_busy, m->mDNS_reentrancy); \
290 m->mDNS_reentrancy--; } while (0)
296 #endif // __DNSCOMMON_H_
Definition: mDNSEmbeddedAPI.h:1082
Definition: mDNSVxWorks.h:60
Definition: mDNSEmbeddedAPI.h:835
Definition: mDNSEmbeddedAPI.h:865
Definition: mDNSEmbeddedAPI.h:253
Definition: mDNSVxWorks.h:49
Definition: mDNSEmbeddedAPI.h:1780
Definition: mDNSEmbeddedAPI.h:1177
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Definition: mDNSEmbeddedAPI.h:1505