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parse dynamic updates, and tsig's right

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This commit is contained in:
Michael Graff
1999-05-12 19:32:13 +00:00
parent 6050eb5ab4
commit 2726950412
5 changed files with 99 additions and 56 deletions
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5
bin/named/server.c
View File

@@ -244,11 +244,6 @@ resolve_packet(isc_mem_t *mctx, dns_message_t *query, isc_buffer_t *target) {
if (result != DNS_R_SUCCESS)
return (result);
result = dns_message_rendersection(message, DNS_SECTION_OPT,
0, 0);
if (result != DNS_R_SUCCESS)
return (result);
result = dns_message_rendersection(message, DNS_SECTION_TSIG,
0, 0);
if (result != DNS_R_SUCCESS)

10
bin/tests/wire_test.c
View File

@@ -220,8 +220,7 @@ printmessage(dns_message_t *msg) {
msg->counts[DNS_SECTION_ANSWER],
msg->counts[DNS_SECTION_AUTHORITY],
msg->counts[DNS_SECTION_ADDITIONAL]);
printf("; PSEUDOSECTIONS: OPT: %u, TSIG: %u\n",
msg->counts[DNS_SECTION_OPT],
printf("; PSEUDOSECTIONS: TSIG: %u\n",
msg->counts[DNS_SECTION_TSIG]);
result = printsection(msg, DNS_SECTION_QUESTION, "QUESTION");
@@ -234,9 +233,6 @@ printmessage(dns_message_t *msg) {
if (result != DNS_R_SUCCESS)
return (result);
result = printsection(msg, DNS_SECTION_ADDITIONAL, "ADDITIONAL");
if (result != DNS_R_SUCCESS)
return (result);
result = printsection(msg, DNS_SECTION_OPT, "PSEUDOSECTION OPT");
if (result != DNS_R_SUCCESS)
return (result);
result = printsection(msg, DNS_SECTION_TSIG, "PSEUDOSECTION TSIG");
@@ -354,10 +350,6 @@ main(int argc, char *argv[]) {
0, 0);
CHECKRESULT(result, "dns_message_rendersection(ADDITIONAL) failed");
result = dns_message_rendersection(message, DNS_SECTION_OPT,
0, 0);
CHECKRESULT(result, "dns_message_rendersection(OPT) failed");
result = dns_message_rendersection(message, DNS_SECTION_TSIG,
0, 0);
CHECKRESULT(result, "dns_message_rendersection(TSIG) failed");

15
lib/dns/include/dns/message.h
View File

@@ -80,9 +80,15 @@ typedef int dns_section_t;
#define DNS_SECTION_ANSWER 1
#define DNS_SECTION_AUTHORITY 2
#define DNS_SECTION_ADDITIONAL 3
#define DNS_SECTION_OPT 4 /* pseudo-section */
#define DNS_SECTION_TSIG 5 /* pseudo-section */
#define DNS_SECTION_MAX 6
#define DNS_SECTION_TSIG 4 /* pseudo-section */
#define DNS_SECTION_MAX 5
/*
* Dynamic update named for these sections.
*/
#define DNS_SECTION_ZONE DNS_SECTION_QUESTION
#define DNS_SECTION_PREREQUISITE DNS_SECTION_ANSWER
#define DNS_SECTION_UPDATE DNS_SECTION_AUTHORITY
/*
* These tell the message library how the created dns_message_t will be used.
@@ -102,10 +108,11 @@ typedef struct {
unsigned int opcode;
dns_rdataclass_t rdclass;
/* 4 real, 2 pseudo */
/* 4 real, 1 pseudo */
unsigned int counts[DNS_SECTION_MAX];
dns_namelist_t sections[DNS_SECTION_MAX];
dns_name_t *cursors[DNS_SECTION_MAX];
dns_rdata_t *opt;
int state;
unsigned int from_to_wire : 2;

10
lib/dns/include/dns/types.h
View File

@@ -110,6 +110,16 @@ enum {
dns_rcode_badmode = 19
};
/*
* opcodes
*/
enum {
dns_opcode_query = 0,
dns_opcode_iquery = 1,
dns_opcode_status = 2,
dns_opcode_update = 5 /* dynamic update */
};
ISC_LANG_ENDDECLS
#endif /* DNS_TYPES_H */

115
lib/dns/message.c
View File

@@ -329,6 +329,7 @@ msginit(dns_message_t *m)
m->cursors[i] = NULL;
m->counts[i] = 0;
}
m->opt = NULL;
m->state = DNS_SECTION_ANY; /* indicate nothing parsed or rendered */
@@ -750,12 +751,13 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx)
rdclass = isc_buffer_getuint16(source);
/*
* If this class is different than the one we alrady read,
* If this class is different than the one we already read,
* this is an error.
*/
if (msg->state == DNS_SECTION_ANY) {
msg->state = DNS_SECTION_QUESTION;
msg->rdclass = rdclass;
msg->state = DNS_SECTION_QUESTION;
} else if (msg->rdclass != rdclass)
return (DNS_R_FORMERR);
@@ -764,7 +766,6 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx)
* If it was found, this is an error, return FORMERR.
*/
result = findtype(NULL, name, rdtype);
if (result == DNS_R_SUCCESS)
return (DNS_R_FORMERR);
@@ -812,9 +813,9 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
dns_ttl_t ttl;
dns_namelist_t *section;
section = &msg->sections[sectionid];
for (count = 0 ; count < msg->counts[sectionid] ; count++) {
section = &msg->sections[sectionid];
name = newname(msg);
if (name == NULL)
return (DNS_R_NOMEMORY);
@@ -828,24 +829,6 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
if (result != DNS_R_SUCCESS)
return (result);
/*
* Run through the section, looking to see if this name
* is already there. If it is found, put back the allocated
* name since we no longer need it, and set our name pointer
* to point to the name we found.
*/
result = findname(&name2, name, section);
/*
* If it is a new name, append to the section.
*/
if (result == DNS_R_SUCCESS) {
releasename(msg, name);
name = name2;
} else {
ISC_LIST_APPEND(*section, name, link);
}
/*
* Get type, class, ttl, and rdatalen. Verify that at least
* rdatalen bytes remain. (Some of this is deferred to
@@ -858,14 +841,21 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
rdclass = isc_buffer_getuint16(source);
/*
* If this class is different than the one we already read,
* this is an error.
* If this class is different than the one in the question
* section, bail.
*/
if (msg->state == DNS_SECTION_ANY) {
msg->state = sectionid;
msg->rdclass = rdclass;
} else if (msg->rdclass != rdclass)
if (msg->rdclass != rdclass)
return (DNS_R_FORMERR);
/*
* If it is a tsig, verify that it is in the additional data
* section, and switch sections for the rest of this rdata.
*/
if (rdtype == dns_rdatatype_tsig) {
if (sectionid != DNS_SECTION_ADDITIONAL)
return (DNS_R_FORMERR);
section = &msg->sections[DNS_SECTION_TSIG];
}
/*
* ... now get ttl and rdatalen, and check buffer.
@@ -877,10 +867,49 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
return (DNS_R_UNEXPECTEDEND);
/*
* Search name for the particular type and class.
* If it was found, this is an error, return FORMERR.
* If we are doing a dynamic update don't bother searching
* for a name, just append this one to the end of the message.
*/
result = findtype(&rdataset, name, rdtype);
if (msg->opcode == dns_opcode_update
|| rdtype == dns_rdatatype_tsig) {
ISC_LIST_APPEND(*section, name, link);
} else {
/*
* Run through the section, looking to see if this name
* is already there. If it is found, put back the
* allocated name since we no longer need it, and set
* our name pointer to point to the name we found.
*/
result = findname(&name2, name, section);
/*
* If it is a new name, append to the section.
*/
if (result == DNS_R_SUCCESS) {
releasename(msg, name);
name = name2;
} else {
ISC_LIST_APPEND(*section, name, link);
}
}
/*
* If this is an OPT record, There Can Be Only One.
*/
#if 0 /* until there is a dns_rdatatype_opt XXXMLG */
if (rdtype == dns_rdatatype_opt && msg->opt != NULL)
return (DNS_R_FORMERR);
#endif
/*
* Search name for the particular type and class.
* Skip this stage if in update mode, or this is a TSIG.
*/
if (msg->opcode == dns_opcode_update
|| rdtype == dns_rdatatype_tsig)
result = DNS_R_NOTFOUND;
else
result = findtype(&rdataset, name, rdtype);
/*
* If we found an rdataset that matches, we need to
@@ -928,6 +957,14 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
rdatalist = (dns_rdatalist_t *)(rdataset->private1);
ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
/*
* If this is an OPT record, remember it.
*/
#if 0 /* until there is a dns_rdatatype_opt XXXMLG */
if (rdtype == dns_rdatatype_opt)
msg->opt = rdata;
#endif
}
return (DNS_R_SUCCESS);
@@ -1176,7 +1213,7 @@ dns_message_renderend(dns_message_t *msg)
{
isc_buffer_t tmpbuf;
isc_region_t r;
isc_uint16_t tmpflags;
isc_uint16_t tmp;
REQUIRE(VALID_MESSAGE(msg));
REQUIRE(msg->buffer != NULL);
@@ -1186,16 +1223,18 @@ dns_message_renderend(dns_message_t *msg)
isc_buffer_putuint16(&tmpbuf, msg->id);
tmpflags = ((msg->opcode << DNS_MESSAGE_OPCODE_SHIFT)
& DNS_MESSAGE_OPCODE_MASK);
tmpflags |= (msg->rcode & DNS_MESSAGE_RCODE_MASK); /* XXX edns? */
tmpflags |= (msg->flags & DNS_MESSAGE_FLAG_MASK);
tmp = ((msg->opcode << DNS_MESSAGE_OPCODE_SHIFT)
& DNS_MESSAGE_OPCODE_MASK);
tmp |= (msg->rcode & DNS_MESSAGE_RCODE_MASK); /* XXX edns? */
tmp |= (msg->flags & DNS_MESSAGE_FLAG_MASK);
isc_buffer_putuint16(&tmpbuf, tmpflags);
isc_buffer_putuint16(&tmpbuf, tmp);
isc_buffer_putuint16(&tmpbuf, msg->counts[DNS_SECTION_QUESTION]);
isc_buffer_putuint16(&tmpbuf, msg->counts[DNS_SECTION_ANSWER]);
isc_buffer_putuint16(&tmpbuf, msg->counts[DNS_SECTION_AUTHORITY]);
isc_buffer_putuint16(&tmpbuf, msg->counts[DNS_SECTION_ADDITIONAL]);
tmp = msg->counts[DNS_SECTION_ADDITIONAL]
+ msg->counts[DNS_SECTION_TSIG];
isc_buffer_putuint16(&tmpbuf, tmp);
msg->buffer = NULL; /* forget about this buffer only on success XXX */