/**
* Fill CH class answer into buffer. Keeps query.
* @param pkt: buffer
* @param str: string to put into text record (<255).
* @param edns: edns reply information.
* @param worker: worker with scratch region.
*/
static void
chaos_replystr(sldns_buffer* pkt, const char* str, struct edns_data* edns,
struct worker* worker)
{
size_t len = strlen(str);
unsigned int rd = LDNS_RD_WIRE(sldns_buffer_begin(pkt));
unsigned int cd = LDNS_CD_WIRE(sldns_buffer_begin(pkt));
if(len>255) len=255; /* cap size of TXT record */
sldns_buffer_clear(pkt);
sldns_buffer_skip(pkt, (ssize_t)sizeof(uint16_t)); /* skip id */
sldns_buffer_write_u16(pkt, (uint16_t)(BIT_QR|BIT_RA));
if(rd) LDNS_RD_SET(sldns_buffer_begin(pkt));
if(cd) LDNS_CD_SET(sldns_buffer_begin(pkt));
sldns_buffer_write_u16(pkt, 1); /* qdcount */
sldns_buffer_write_u16(pkt, 1); /* ancount */
sldns_buffer_write_u16(pkt, 0); /* nscount */
sldns_buffer_write_u16(pkt, 0); /* arcount */
(void)query_dname_len(pkt); /* skip qname */
sldns_buffer_skip(pkt, (ssize_t)sizeof(uint16_t)); /* skip qtype */
sldns_buffer_skip(pkt, (ssize_t)sizeof(uint16_t)); /* skip qclass */
sldns_buffer_write_u16(pkt, 0xc00c); /* compr ptr to query */
sldns_buffer_write_u16(pkt, LDNS_RR_TYPE_TXT);
sldns_buffer_write_u16(pkt, LDNS_RR_CLASS_CH);
sldns_buffer_write_u32(pkt, 0); /* TTL */
sldns_buffer_write_u16(pkt, sizeof(uint8_t) + len);
sldns_buffer_write_u8(pkt, len);
sldns_buffer_write(pkt, str, len);
sldns_buffer_flip(pkt);
edns->edns_version = EDNS_ADVERTISED_VERSION;
edns->udp_size = EDNS_ADVERTISED_SIZE;
edns->bits &= EDNS_DO;
if(!edns_opt_inplace_reply(edns, worker->scratchpad))
edns->opt_list = NULL;
attach_edns_record(pkt, edns);
}
/** calculate the size of one rr */
static int
calc_size(sldns_buffer* pkt, uint16_t type, struct rr_parse* rr)
{
const sldns_rr_descriptor* desc;
uint16_t pkt_len; /* length of rr inside the packet */
rr->size = sizeof(uint16_t); /* the rdatalen */
sldns_buffer_skip(pkt, 4); /* skip ttl */
pkt_len = sldns_buffer_read_u16(pkt);
if(sldns_buffer_remaining(pkt) < pkt_len)
return 0;
desc = sldns_rr_descript(type);
if(pkt_len > 0 && desc && desc->_dname_count > 0) {
int count = (int)desc->_dname_count;
int rdf = 0;
size_t len;
size_t oldpos;
/* skip first part. */
while(pkt_len > 0 && count) {
switch(desc->_wireformat[rdf]) {
case LDNS_RDF_TYPE_DNAME:
/* decompress every domain name */
oldpos = sldns_buffer_position(pkt);
if((len = pkt_dname_len(pkt)) == 0)
return 0; /* malformed dname */
if(sldns_buffer_position(pkt)-oldpos > pkt_len)
return 0; /* dname exceeds rdata */
pkt_len -= sldns_buffer_position(pkt)-oldpos;
rr->size += len;
count--;
len = 0;
break;
case LDNS_RDF_TYPE_STR:
if(pkt_len < 1) {
/* NOTREACHED, due to 'while(>0)' */
return 0; /* len byte exceeds rdata */
}
len = sldns_buffer_current(pkt)[0] + 1;
break;
default:
len = get_rdf_size(desc->_wireformat[rdf]);
}
if(len) {
if(pkt_len < len)
return 0; /* exceeds rdata */
pkt_len -= len;
sldns_buffer_skip(pkt, (ssize_t)len);
rr->size += len;
}
rdf++;
}
}
/* remaining rdata */
rr->size += pkt_len;
sldns_buffer_skip(pkt, (ssize_t)pkt_len);
return 1;
}
/** skip rr ttl and rdata */
static int
skip_ttl_rdata(sldns_buffer* pkt)
{
uint16_t rdatalen;
if(sldns_buffer_remaining(pkt) < 6) /* ttl + rdatalen */
return 0;
sldns_buffer_skip(pkt, 4); /* ttl */
rdatalen = sldns_buffer_read_u16(pkt);
if(sldns_buffer_remaining(pkt) < rdatalen)
return 0;
sldns_buffer_skip(pkt, (ssize_t)rdatalen);
return 1;
}
/** compress domain names in rdata, return RETVAL_* */
static int
compress_rdata(sldns_buffer* pkt, uint8_t* rdata, size_t todolen,
struct regional* region, struct compress_tree_node** tree,
const sldns_rr_descriptor* desc)
{
int labs, r, rdf = 0;
size_t dname_len, len, pos = sldns_buffer_position(pkt);
uint8_t count = desc->_dname_count;
sldns_buffer_skip(pkt, 2); /* rdata len fill in later */
/* space for rdatalen checked for already */
rdata += 2;
todolen -= 2;
while(todolen > 0 && count) {
switch(desc->_wireformat[rdf]) {
case LDNS_RDF_TYPE_DNAME:
labs = dname_count_size_labels(rdata, &dname_len);
if((r=compress_any_dname(rdata, pkt, labs, region,
tree)) != RETVAL_OK)
return r;
rdata += dname_len;
todolen -= dname_len;
count--;
len = 0;
break;
case LDNS_RDF_TYPE_STR:
len = *rdata + 1;
break;
default:
len = get_rdf_size(desc->_wireformat[rdf]);
}
if(len) {
/* copy over */
if(sldns_buffer_remaining(pkt) < len)
return RETVAL_TRUNC;
sldns_buffer_write(pkt, rdata, len);
todolen -= len;
rdata += len;
}
rdf++;
}
/* copy remainder */
if(todolen > 0) {
if(sldns_buffer_remaining(pkt) < todolen)
return RETVAL_TRUNC;
sldns_buffer_write(pkt, rdata, todolen);
}
/* set rdata len */
sldns_buffer_write_u16_at(pkt, pos, sldns_buffer_position(pkt)-pos-2);
return RETVAL_OK;
}
/** analyze rdata in packet */
static void analyze_rdata(sldns_buffer*pkt, const sldns_rr_descriptor* desc,
uint16_t rdlen)
{
int rdf = 0;
int count = (int)desc->_dname_count;
size_t len, oldpos;
while(rdlen > 0 && count) {
switch(desc->_wireformat[rdf]) {
case LDNS_RDF_TYPE_DNAME:
oldpos = sldns_buffer_position(pkt);
analyze_dname(pkt);
rdlen -= sldns_buffer_position(pkt)-oldpos;
count --;
len = 0;
break;
case LDNS_RDF_TYPE_STR:
len = sldns_buffer_current(pkt)[0] + 1;
break;
default:
len = get_rdf_size(desc->_wireformat[rdf]);
}
if(len) {
printf(" wf[%d]", (int)len);
sldns_buffer_skip(pkt, (ssize_t)len);
rdlen -= len;
}
rdf++;
}
if(rdlen) {
size_t i;
printf(" remain[%d]\n", (int)rdlen);
for(i=0; i<rdlen; i++)
printf(" %2.2X", (unsigned)sldns_buffer_current(pkt)[i]);
printf("\n");
}
else printf("\n");
sldns_buffer_skip(pkt, (ssize_t)rdlen);
}
size_t
pkt_dname_len(sldns_buffer* pkt)
{
size_t len = 0;
int ptrcount = 0;
uint8_t labellen;
size_t endpos = 0;
/* read dname and determine length */
/* check compression pointers, loops, out of bounds */
while(1) {
/* read next label */
if(sldns_buffer_remaining(pkt) < 1)
return 0;
labellen = sldns_buffer_read_u8(pkt);
if(LABEL_IS_PTR(labellen)) {
/* compression ptr */
uint16_t ptr;
if(sldns_buffer_remaining(pkt) < 1)
return 0;
ptr = PTR_OFFSET(labellen, sldns_buffer_read_u8(pkt));
if(ptrcount++ > MAX_COMPRESS_PTRS)
return 0; /* loop! */
if(sldns_buffer_limit(pkt) <= ptr)
return 0; /* out of bounds! */
if(!endpos)
endpos = sldns_buffer_position(pkt);
sldns_buffer_set_position(pkt, ptr);
} else {
/* label contents */
if(labellen > 0x3f)
return 0; /* label too long */
len += 1 + labellen;
if(len > LDNS_MAX_DOMAINLEN)
return 0;
if(labellen == 0) {
/* end of dname */
break;
}
if(sldns_buffer_remaining(pkt) < labellen)
return 0;
sldns_buffer_skip(pkt, (ssize_t)labellen);
}
}
if(endpos)
sldns_buffer_set_position(pkt, endpos);
return len;
}
void
qinfo_query_encode(sldns_buffer* pkt, struct query_info* qinfo)
{
uint16_t flags = 0; /* QUERY, NOERROR */
sldns_buffer_clear(pkt);
log_assert(sldns_buffer_remaining(pkt) >= 12+255+4/*max query*/);
sldns_buffer_skip(pkt, 2); /* id done later */
sldns_buffer_write_u16(pkt, flags);
sldns_buffer_write_u16(pkt, 1); /* query count */
sldns_buffer_write(pkt, "\000\000\000\000\000\000", 6); /* counts */
sldns_buffer_write(pkt, qinfo->qname, qinfo->qname_len);
sldns_buffer_write_u16(pkt, qinfo->qtype);
sldns_buffer_write_u16(pkt, qinfo->qclass);
sldns_buffer_flip(pkt);
}
/** return type networkformat that rrsig in packet covers */
static int
pkt_rrsig_covered(sldns_buffer* pkt, uint8_t* here, uint16_t* type)
{
size_t pos = sldns_buffer_position(pkt);
sldns_buffer_set_position(pkt, (size_t)(here-sldns_buffer_begin(pkt)));
/* ttl + len + size of small rrsig(rootlabel, no signature) */
if(sldns_buffer_remaining(pkt) < 4+2+19)
return 0;
sldns_buffer_skip(pkt, 4); /* ttl */
if(sldns_buffer_read_u16(pkt) < 19) /* too short */ {
sldns_buffer_set_position(pkt, pos);
return 0;
}
*type = sldns_buffer_read_u16(pkt);
sldns_buffer_set_position(pkt, pos);
return 1;
}
/** store query section in wireformat buffer, return RETVAL */
static int
insert_query(struct query_info* qinfo, struct compress_tree_node** tree,
sldns_buffer* buffer, struct regional* region)
{
if(sldns_buffer_remaining(buffer) <
qinfo->qname_len+sizeof(uint16_t)*2)
return RETVAL_TRUNC; /* buffer too small */
/* the query is the first name inserted into the tree */
if(!compress_tree_store(qinfo->qname,
dname_count_labels(qinfo->qname),
sldns_buffer_position(buffer), region, NULL, tree))
return RETVAL_OUTMEM;
if(sldns_buffer_current(buffer) == qinfo->qname)
sldns_buffer_skip(buffer, (ssize_t)qinfo->qname_len);
else sldns_buffer_write(buffer, qinfo->qname, qinfo->qname_len);
sldns_buffer_write_u16(buffer, qinfo->qtype);
sldns_buffer_write_u16(buffer, qinfo->qclass);
return RETVAL_OK;
}
void
error_encode(sldns_buffer* buf, int r, struct query_info* qinfo,
uint16_t qid, uint16_t qflags, struct edns_data* edns)
{
uint16_t flags;
sldns_buffer_clear(buf);
sldns_buffer_write(buf, &qid, sizeof(uint16_t));
flags = (uint16_t)(BIT_QR | BIT_RA | r); /* QR and retcode*/
flags |= (qflags & (BIT_RD|BIT_CD)); /* copy RD and CD bit */
sldns_buffer_write_u16(buf, flags);
if(qinfo) flags = 1;
else flags = 0;
sldns_buffer_write_u16(buf, flags);
flags = 0;
sldns_buffer_write(buf, &flags, sizeof(uint16_t));
sldns_buffer_write(buf, &flags, sizeof(uint16_t));
sldns_buffer_write(buf, &flags, sizeof(uint16_t));
if(qinfo) {
const uint8_t* qname = qinfo->local_alias ?
qinfo->local_alias->rrset->rk.dname : qinfo->qname;
size_t qname_len = qinfo->local_alias ?
qinfo->local_alias->rrset->rk.dname_len :
qinfo->qname_len;
if(sldns_buffer_current(buf) == qname)
sldns_buffer_skip(buf, (ssize_t)qname_len);
else sldns_buffer_write(buf, qname, qname_len);
sldns_buffer_write_u16(buf, qinfo->qtype);
sldns_buffer_write_u16(buf, qinfo->qclass);
}
sldns_buffer_flip(buf);
if(edns) {
struct edns_data es = *edns;
es.edns_version = EDNS_ADVERTISED_VERSION;
es.udp_size = EDNS_ADVERTISED_SIZE;
es.ext_rcode = 0;
es.bits &= EDNS_DO;
if(sldns_buffer_limit(buf) + calc_edns_field_size(&es) >
edns->udp_size)
return;
attach_edns_record(buf, &es);
}
}
void
qinfo_query_encode(sldns_buffer* pkt, struct query_info* qinfo)
{
uint16_t flags = 0; /* QUERY, NOERROR */
const uint8_t* qname = qinfo->local_alias ?
qinfo->local_alias->rrset->rk.dname : qinfo->qname;
size_t qname_len = qinfo->local_alias ?
qinfo->local_alias->rrset->rk.dname_len : qinfo->qname_len;
sldns_buffer_clear(pkt);
log_assert(sldns_buffer_remaining(pkt) >= 12+255+4/*max query*/);
sldns_buffer_skip(pkt, 2); /* id done later */
sldns_buffer_write_u16(pkt, flags);
sldns_buffer_write_u16(pkt, 1); /* query count */
sldns_buffer_write(pkt, "\000\000\000\000\000\000", 6); /* counts */
sldns_buffer_write(pkt, qname, qname_len);
sldns_buffer_write_u16(pkt, qinfo->qtype);
sldns_buffer_write_u16(pkt, qinfo->qclass);
sldns_buffer_flip(pkt);
}
/** See if next rrset is nsec at zone apex */
static int
nsec_at_apex(sldns_buffer* pkt)
{
/* we are at ttl position in packet. */
size_t pos = sldns_buffer_position(pkt);
uint16_t rdatalen;
if(sldns_buffer_remaining(pkt) < 7) /* ttl+len+root */
return 0; /* eek! */
sldns_buffer_skip(pkt, 4); /* ttl */;
rdatalen = sldns_buffer_read_u16(pkt);
if(sldns_buffer_remaining(pkt) < rdatalen) {
sldns_buffer_set_position(pkt, pos);
return 0; /* parse error happens later */
}
/* must validate the nsec next domain name format */
if(pkt_dname_len(pkt) == 0) {
sldns_buffer_set_position(pkt, pos);
return 0; /* parse error */
}
/* see if SOA bit is set. */
if(sldns_buffer_position(pkt) < pos+4+rdatalen) {
/* nsec type bitmap contains items */
uint8_t win, blen, bits;
/* need: windownum, bitmap len, firstbyte */
if(sldns_buffer_position(pkt)+3 > pos+4+rdatalen) {
sldns_buffer_set_position(pkt, pos);
return 0; /* malformed nsec */
}
win = sldns_buffer_read_u8(pkt);
blen = sldns_buffer_read_u8(pkt);
bits = sldns_buffer_read_u8(pkt);
/* 0window always first window. bitlen >=1 or parse
error really. bit 0x2 is SOA. */
if(win == 0 && blen >= 1 && (bits & 0x02)) {
sldns_buffer_set_position(pkt, pos);
return 1;
}
}
sldns_buffer_set_position(pkt, pos);
return 0;
}
int
query_info_parse(struct query_info* m, sldns_buffer* query)
{
uint8_t* q = sldns_buffer_begin(query);
/* minimum size: header + \0 + qtype + qclass */
if(sldns_buffer_limit(query) < LDNS_HEADER_SIZE + 5)
return 0;
if(LDNS_OPCODE_WIRE(q) != LDNS_PACKET_QUERY ||
LDNS_QDCOUNT(q) != 1 || sldns_buffer_position(query) != 0)
return 0;
sldns_buffer_skip(query, LDNS_HEADER_SIZE);
m->qname = sldns_buffer_current(query);
if((m->qname_len = query_dname_len(query)) == 0)
return 0; /* parse error */
if(sldns_buffer_remaining(query) < 4)
return 0; /* need qtype, qclass */
m->qtype = sldns_buffer_read_u16(query);
m->qclass = sldns_buffer_read_u16(query);
return 1;
}
/* determine length of a dname in buffer, no compression pointers allowed */
size_t
query_dname_len(sldns_buffer* query)
{
size_t len = 0;
size_t labellen;
while(1) {
if(sldns_buffer_remaining(query) < 1)
return 0; /* parse error, need label len */
labellen = sldns_buffer_read_u8(query);
if(labellen&0xc0)
return 0; /* no compression allowed in queries */
len += labellen + 1;
if(len > LDNS_MAX_DOMAINLEN)
return 0; /* too long */
if(labellen == 0)
return len;
if(sldns_buffer_remaining(query) < labellen)
return 0; /* parse error, need content */
sldns_buffer_skip(query, (ssize_t)labellen);
}
}
/** see if RRSIG is a duplicate of another */
static int
sig_is_double(sldns_buffer* pkt, struct rrset_parse* rrset, uint8_t* ttldata)
{
uint16_t rlen, siglen;
size_t pos = sldns_buffer_position(pkt);
struct rr_parse* sig;
if(sldns_buffer_remaining(pkt) < 6)
return 0;
sldns_buffer_skip(pkt, 4); /* ttl */
rlen = sldns_buffer_read_u16(pkt);
if(sldns_buffer_remaining(pkt) < rlen) {
sldns_buffer_set_position(pkt, pos);
return 0;
}
sldns_buffer_set_position(pkt, pos);
sig = rrset->rrsig_first;
while(sig) {
/* check if rdatalen is same */
memmove(&siglen, sig->ttl_data+4, sizeof(siglen));
siglen = ntohs(siglen);
/* checks if data in packet is exactly the same, this means
* also dname in rdata is the same, but rrsig is not allowed
* to have compressed dnames anyway. If it is compressed anyway
* it will lead to duplicate rrs for qtype=RRSIG. (or ANY).
*
* Cannot use sig->size because size of the other one is not
* calculated yet.
*/
if(siglen == rlen) {
if(siglen>0 && memcmp(sig->ttl_data+6, ttldata+6,
siglen) == 0) {
/* same! */
return 1;
}
}
sig = sig->next;
}
return 0;
}
/** analyze rr in packet */
static void analyze_rr(sldns_buffer* pkt, int q)
{
uint16_t type, dclass, len;
uint32_t ttl;
analyze_dname(pkt);
type = sldns_buffer_read_u16(pkt);
dclass = sldns_buffer_read_u16(pkt);
printf("type %s(%d)", sldns_rr_descript(type)?
sldns_rr_descript(type)->_name: "??" , (int)type);
printf(" class %s(%d) ", sldns_lookup_by_id(sldns_rr_classes,
(int)dclass)?sldns_lookup_by_id(sldns_rr_classes,
(int)dclass)->name:"??", (int)dclass);
if(q) {
printf("\n");
} else {
ttl = sldns_buffer_read_u32(pkt);
printf(" ttl %d (0x%x)", (int)ttl, (unsigned)ttl);
len = sldns_buffer_read_u16(pkt);
printf(" rdata len %d:\n", (int)len);
if(sldns_rr_descript(type))
analyze_rdata(pkt, sldns_rr_descript(type), len);
else sldns_buffer_skip(pkt, (ssize_t)len);
}
}
/**
* read contents of trusted-keys{ ... ; clauses and insert keys into storage.
* @param anchors: where to store keys
* @param buf: buffer to use
* @param line: line number in file
* @param in: file to read from.
* @return 0 on error.
*/
static int
process_bind_contents(struct val_anchors* anchors, sldns_buffer* buf,
int* line, FILE* in)
{
/* loop over contents, collate strings before ; */
/* contents is (numbered): 0 1 2 3 4 5 6 7 8 */
/* name. 257 3 5 base64 base64 */
/* quoted value: 0 "111" 0 0 0 0 0 0 0 */
/* comments value: 1 "000" 1 1 1 "0 0 0 0" 1 */
int contnum = 0;
int quoted = 0;
int comments = 1;
int rdlen;
char* str = 0;
sldns_buffer_clear(buf);
while((rdlen=readkeyword_bindfile(in, buf, line, comments))) {
if(rdlen == 1 && sldns_buffer_position(buf) == 1
&& isspace((unsigned char)*sldns_buffer_begin(buf))) {
/* starting whitespace is removed */
sldns_buffer_clear(buf);
continue;
} else if(rdlen == 1 && sldns_buffer_current(buf)[-1] == '"') {
/* remove " from the string */
if(contnum == 0) {
quoted = 1;
comments = 0;
}
sldns_buffer_skip(buf, -1);
if(contnum > 0 && quoted) {
if(sldns_buffer_remaining(buf) < 8+1) {
log_err("line %d, too long", *line);
return 0;
}
sldns_buffer_write(buf, " DNSKEY ", 8);
quoted = 0;
comments = 1;
} else if(contnum > 0)
comments = !comments;
continue;
} else if(rdlen == 1 && sldns_buffer_current(buf)[-1] == ';') {
if(contnum < 5) {
sldns_buffer_write_u8(buf, 0);
log_err("line %d, bad key", *line);
return 0;
}
sldns_buffer_skip(buf, -1);
sldns_buffer_write_u8(buf, 0);
str = strdup((char*)sldns_buffer_begin(buf));
if(!str) {
log_err("line %d, allocation failure", *line);
return 0;
}
if(!anchor_store_str(anchors, buf, str)) {
log_err("line %d, bad key", *line);
free(str);
return 0;
}
free(str);
sldns_buffer_clear(buf);
contnum = 0;
quoted = 0;
comments = 1;
continue;
} else if(rdlen == 1 && sldns_buffer_current(buf)[-1] == '}') {
if(contnum > 0) {
sldns_buffer_write_u8(buf, 0);
log_err("line %d, bad key before }", *line);
return 0;
}
return 1;
} else if(rdlen == 1 &&
isspace((unsigned char)sldns_buffer_current(buf)[-1])) {
/* leave whitespace here */
} else {
/* not space or whatnot, so actual content */
contnum ++;
if(contnum == 1 && !quoted) {
if(sldns_buffer_remaining(buf) < 8+1) {
log_err("line %d, too long", *line);
return 0;
}
sldns_buffer_write(buf, " DNSKEY ", 8);
}
}
}
log_err("line %d, EOF before }", *line);
return 0;
}
/**
* Read a keyword skipping bind comments; spaces, specials, restkeywords.
* The file is split into the following tokens:
* * special characters, on their own, rdlen=1, { } doublequote ;
* * whitespace becomes a single ' ' or tab. Newlines become spaces.
* * other words ('keywords')
* * comments are skipped if desired
* / / C++ style comment to end of line
* # to end of line
* / * C style comment * /
* @param in: file to read from.
* @param buf: buffer, what is read is stored after current buffer position.
* Space is left in the buffer to write a terminating 0.
* @param line: line number is increased per line, for error reports.
* @param comments: if 0, comments are not possible and become text.
* if 1, comments are skipped entirely.
* In BIND files, this is when reading quoted strings, for example
* " base 64 text with / / in there "
* @return the number of character written to the buffer.
* 0 on end of file.
*/
static int
readkeyword_bindfile(FILE* in, sldns_buffer* buf, int* line, int comments)
{
int c;
int numdone = 0;
while((c = getc(in)) != EOF ) {
if(comments && c == '#') { /* # blabla */
skip_to_eol(in);
(*line)++;
continue;
} else if(comments && c=='/' && numdone>0 && /* /_/ bla*/
sldns_buffer_read_u8_at(buf,
sldns_buffer_position(buf)-1) == '/') {
sldns_buffer_skip(buf, -1);
numdone--;
skip_to_eol(in);
(*line)++;
continue;
} else if(comments && c=='*' && numdone>0 && /* /_* bla *_/ */
sldns_buffer_read_u8_at(buf,
sldns_buffer_position(buf)-1) == '/') {
sldns_buffer_skip(buf, -1);
numdone--;
/* skip to end of comment */
while(c != EOF && (c=getc(in)) != EOF ) {
if(c == '*') {
if((c=getc(in)) == '/')
break;
}
if(c == '\n')
(*line)++;
}
continue;
}
/* not a comment, complete the keyword */
if(numdone > 0) {
/* check same type */
if(isspace((unsigned char)c)) {
ungetc(c, in);
return numdone;
}
if(is_bind_special(c)) {
ungetc(c, in);
return numdone;
}
}
if(c == '\n') {
c = ' ';
(*line)++;
}
/* space for 1 char + 0 string terminator */
if(sldns_buffer_remaining(buf) < 2) {
fatal_exit("trusted-keys, %d, string too long", *line);
}
sldns_buffer_write_u8(buf, (uint8_t)c);
numdone++;
if(isspace((unsigned char)c)) {
/* collate whitespace into ' ' */
while((c = getc(in)) != EOF ) {
if(c == '\n')
(*line)++;
if(!isspace((unsigned char)c)) {
ungetc(c, in);
break;
}
}
return numdone;
}
if(is_bind_special(c))
return numdone;
}
return numdone;
}
/** do the rdata copy */
static int
rdata_copy(sldns_buffer* pkt, struct packed_rrset_data* data, uint8_t* to,
struct rr_parse* rr, time_t* rr_ttl, uint16_t type,
sldns_pkt_section section)
{
uint16_t pkt_len;
const sldns_rr_descriptor* desc;
*rr_ttl = sldns_read_uint32(rr->ttl_data);
/* RFC 2181 Section 8. if msb of ttl is set treat as if zero. */
if(*rr_ttl & 0x80000000U)
*rr_ttl = 0;
if(type == LDNS_RR_TYPE_SOA && section == LDNS_SECTION_AUTHORITY) {
/* negative response. see if TTL of SOA record larger than the
* minimum-ttl in the rdata of the SOA record */
if(*rr_ttl > soa_find_minttl(rr))
*rr_ttl = soa_find_minttl(rr);
if(*rr_ttl > MAX_NEG_TTL)
*rr_ttl = MAX_NEG_TTL;
}
if(*rr_ttl < MIN_TTL)
*rr_ttl = MIN_TTL;
if(*rr_ttl < data->ttl)
data->ttl = *rr_ttl;
if(rr->outside_packet) {
/* uncompressed already, only needs copy */
memmove(to, rr->ttl_data+sizeof(uint32_t), rr->size);
return 1;
}
sldns_buffer_set_position(pkt, (size_t)
(rr->ttl_data - sldns_buffer_begin(pkt) + sizeof(uint32_t)));
/* insert decompressed size into rdata len stored in memory */
/* -2 because rdatalen bytes are not included. */
pkt_len = htons(rr->size - 2);
memmove(to, &pkt_len, sizeof(uint16_t));
to += 2;
/* read packet rdata len */
pkt_len = sldns_buffer_read_u16(pkt);
if(sldns_buffer_remaining(pkt) < pkt_len)
return 0;
desc = sldns_rr_descript(type);
if(pkt_len > 0 && desc && desc->_dname_count > 0) {
int count = (int)desc->_dname_count;
int rdf = 0;
size_t len;
size_t oldpos;
/* decompress dnames. */
while(pkt_len > 0 && count) {
switch(desc->_wireformat[rdf]) {
case LDNS_RDF_TYPE_DNAME:
oldpos = sldns_buffer_position(pkt);
dname_pkt_copy(pkt, to,
sldns_buffer_current(pkt));
to += pkt_dname_len(pkt);
pkt_len -= sldns_buffer_position(pkt)-oldpos;
count--;
len = 0;
break;
case LDNS_RDF_TYPE_STR:
len = sldns_buffer_current(pkt)[0] + 1;
break;
default:
len = get_rdf_size(desc->_wireformat[rdf]);
break;
}
if(len) {
memmove(to, sldns_buffer_current(pkt), len);
to += len;
sldns_buffer_skip(pkt, (ssize_t)len);
log_assert(len <= pkt_len);
pkt_len -= len;
}
rdf++;
}
}
/* copy remaining rdata */
if(pkt_len > 0)
memmove(to, sldns_buffer_current(pkt), pkt_len);
return 1;
}
