/**
* Convert salt to string.
*
*/
const char*
nsec3params_salt2str(nsec3params_type* nsec3params)
{
uint8_t *data;
uint8_t salt_length = 0;
uint8_t salt_pos = 0;
int written = 0;
char* str = NULL;
ldns_buffer* buffer = NULL;
salt_length = nsec3params->salt_len;
data = nsec3params->salt_data;
/* from now there are variable length entries so remember pos */
if (salt_length == 0) {
buffer = ldns_buffer_new(2);
written = ldns_buffer_printf(buffer, "-");
} else {
buffer = ldns_buffer_new(salt_pos+1);
for (salt_pos = 0; salt_pos < salt_length; salt_pos++) {
written = ldns_buffer_printf(buffer, "%02x", data[salt_pos]);
}
}
if (ldns_buffer_status(buffer) == LDNS_STATUS_OK) {
str = ldns_buffer2str(buffer);
} else if (written) {
ods_log_error("[%s] unable to convert nsec3 salt to string: %s",
nsec3_str, ldns_get_errorstr_by_id(ldns_buffer_status(buffer)));
} else {
ods_log_error("[%s] unable to convert nsec3 salt to string: zero "
"bytes written", nsec3_str);
}
ldns_buffer_free(buffer);
return (const char*) str;
}
ldns_status
ldns_rr2buffer_wire(ldns_buffer *buffer, const ldns_rr *rr, int section)
{
uint16_t i;
uint16_t rdl_pos = 0;
if (ldns_rr_owner(rr)) {
(void) ldns_dname2buffer_wire(buffer, ldns_rr_owner(rr));
}
if (ldns_buffer_reserve(buffer, 4)) {
(void) ldns_buffer_write_u16(buffer, ldns_rr_get_type(rr));
(void) ldns_buffer_write_u16(buffer, ldns_rr_get_class(rr));
}
if (section != LDNS_SECTION_QUESTION) {
if (ldns_buffer_reserve(buffer, 6)) {
ldns_buffer_write_u32(buffer, ldns_rr_ttl(rr));
/* remember pos for later */
rdl_pos = ldns_buffer_position(buffer);
ldns_buffer_write_u16(buffer, 0);
}
for (i = 0; i < ldns_rr_rd_count(rr); i++) {
(void) ldns_rdf2buffer_wire(buffer, ldns_rr_rdf(rr, i));
}
if (rdl_pos != 0) {
ldns_buffer_write_u16_at(buffer, rdl_pos,
ldns_buffer_position(buffer)
- rdl_pos - 2);
}
}
return ldns_buffer_status(buffer);
}
ldns_status
ldns_rdf2buffer_wire(ldns_buffer *buffer, const ldns_rdf *rdf)
{
if (ldns_buffer_reserve(buffer, ldns_rdf_size(rdf))) {
ldns_buffer_write(buffer, ldns_rdf_data(rdf), ldns_rdf_size(rdf));
}
return ldns_buffer_status(buffer);
}
ldns_status
ldns_dname2buffer_wire(ldns_buffer *buffer, const ldns_rdf *name)
{
if (ldns_buffer_reserve(buffer, ldns_rdf_size(name))) {
ldns_buffer_write(buffer, ldns_rdf_data(name), ldns_rdf_size(name));
}
return ldns_buffer_status(buffer);
}
ldns_status
ldns_rr_rdata2buffer_wire(ldns_buffer *buffer, const ldns_rr *rr)
{
uint16_t i;
/* convert all the rdf's */
for (i = 0; i < ldns_rr_rd_count(rr); i++) {
(void) ldns_rdf2buffer_wire(buffer, ldns_rr_rdf(rr, i));
}
return ldns_buffer_status(buffer);
}
/* convert a rr list to wireformat */
ldns_status
ldns_rr_list2buffer_wire(ldns_buffer *buffer,const ldns_rr_list *rr_list)
{
uint16_t rr_count;
uint16_t i;
rr_count = ldns_rr_list_rr_count(rr_list);
for(i = 0; i < rr_count; i++) {
(void)ldns_rr2buffer_wire(buffer, ldns_rr_list_rr(rr_list, i),
LDNS_SECTION_ANY);
}
return ldns_buffer_status(buffer);
}
ldns_status
ldns_rrsig2buffer_wire(ldns_buffer *buffer, const ldns_rr *rr)
{
uint16_t i;
/* it must be a sig RR */
if (ldns_rr_get_type(rr) != LDNS_RR_TYPE_RRSIG) {
return LDNS_STATUS_ERR;
}
/* Convert all the rdfs, except the actual signature data
* rdf number 8 - the last, hence: -1 */
for (i = 0; i < ldns_rr_rd_count(rr) - 1; i++) {
(void) ldns_rdf2buffer_wire(buffer, ldns_rr_rdf(rr, i));
}
return ldns_buffer_status(buffer);
}
/*
* Copies the packet header data to the buffer in wire format
*/
static ldns_status
ldns_hdr2buffer_wire(ldns_buffer *buffer, const ldns_pkt *packet)
{
uint8_t flags;
uint16_t arcount;
if (ldns_buffer_reserve(buffer, 12)) {
ldns_buffer_write_u16(buffer, ldns_pkt_id(packet));
flags = ldns_pkt_qr(packet) << 7
| ldns_pkt_get_opcode(packet) << 3
| ldns_pkt_aa(packet) << 2
| ldns_pkt_tc(packet) << 1 | ldns_pkt_rd(packet);
ldns_buffer_write_u8(buffer, flags);
flags = ldns_pkt_ra(packet) << 7
/*| ldns_pkt_z(packet) << 6*/
| ldns_pkt_ad(packet) << 5
| ldns_pkt_cd(packet) << 4 | ldns_pkt_get_rcode(packet);
ldns_buffer_write_u8(buffer, flags);
ldns_buffer_write_u16(buffer, ldns_pkt_qdcount(packet));
ldns_buffer_write_u16(buffer, ldns_pkt_ancount(packet));
ldns_buffer_write_u16(buffer, ldns_pkt_nscount(packet));
/* add EDNS0 and TSIG to additional if they are there */
arcount = ldns_pkt_arcount(packet);
if (ldns_pkt_tsig(packet)) {
arcount++;
}
if (ldns_pkt_edns(packet)) {
arcount++;
}
ldns_buffer_write_u16(buffer, arcount);
}
return ldns_buffer_status(buffer);
}
ldns_status
ldns_rdf2buffer_wire_canonical(ldns_buffer *buffer, const ldns_rdf *rdf)
{
size_t i;
uint8_t *rdf_data;
if (ldns_rdf_get_type(rdf) == LDNS_RDF_TYPE_DNAME) {
if (ldns_buffer_reserve(buffer, ldns_rdf_size(rdf))) {
rdf_data = ldns_rdf_data(rdf);
for (i = 0; i < ldns_rdf_size(rdf); i++) {
ldns_buffer_write_u8(buffer,
LDNS_DNAME_NORMALIZE(rdf_data[i]));
}
}
} else {
/* direct copy for all other types */
if (ldns_buffer_reserve(buffer, ldns_rdf_size(rdf))) {
ldns_buffer_write(buffer,
ldns_rdf_data(rdf),
ldns_rdf_size(rdf));
}
}
return ldns_buffer_status(buffer);
}
ldns_status
ldns_rr2buffer_wire_canonical(ldns_buffer *buffer,
const ldns_rr *rr,
int section)
{
uint16_t i;
uint16_t rdl_pos = 0;
bool pre_rfc3597 = false;
switch (ldns_rr_get_type(rr)) {
case LDNS_RR_TYPE_NS:
case LDNS_RR_TYPE_MD:
case LDNS_RR_TYPE_MF:
case LDNS_RR_TYPE_CNAME:
case LDNS_RR_TYPE_SOA:
case LDNS_RR_TYPE_MB:
case LDNS_RR_TYPE_MG:
case LDNS_RR_TYPE_MR:
case LDNS_RR_TYPE_PTR:
case LDNS_RR_TYPE_HINFO:
case LDNS_RR_TYPE_MINFO:
case LDNS_RR_TYPE_MX:
case LDNS_RR_TYPE_RP:
case LDNS_RR_TYPE_AFSDB:
case LDNS_RR_TYPE_RT:
case LDNS_RR_TYPE_SIG:
case LDNS_RR_TYPE_PX:
case LDNS_RR_TYPE_NXT:
case LDNS_RR_TYPE_NAPTR:
case LDNS_RR_TYPE_KX:
case LDNS_RR_TYPE_SRV:
case LDNS_RR_TYPE_DNAME:
case LDNS_RR_TYPE_A6:
pre_rfc3597 = true;
break;
default:
break;
}
if (ldns_rr_owner(rr)) {
(void) ldns_rdf2buffer_wire_canonical(buffer, ldns_rr_owner(rr));
}
if (ldns_buffer_reserve(buffer, 4)) {
(void) ldns_buffer_write_u16(buffer, ldns_rr_get_type(rr));
(void) ldns_buffer_write_u16(buffer, ldns_rr_get_class(rr));
}
if (section != LDNS_SECTION_QUESTION) {
if (ldns_buffer_reserve(buffer, 6)) {
ldns_buffer_write_u32(buffer, ldns_rr_ttl(rr));
/* remember pos for later */
rdl_pos = ldns_buffer_position(buffer);
ldns_buffer_write_u16(buffer, 0);
}
for (i = 0; i < ldns_rr_rd_count(rr); i++) {
if (pre_rfc3597) {
(void) ldns_rdf2buffer_wire_canonical(buffer,
ldns_rr_rdf(rr, i));
} else {
(void) ldns_rdf2buffer_wire(buffer, ldns_rr_rdf(rr, i));
}
}
if (rdl_pos != 0) {
ldns_buffer_write_u16_at(buffer, rdl_pos,
ldns_buffer_position(buffer)
- rdl_pos - 2);
}
}
return ldns_buffer_status(buffer);
}
ldns_status
ldns_resolver_new_frm_fp_l(ldns_resolver **res, FILE *fp, int *line_nr)
{
ldns_resolver *r;
const char *keyword[LDNS_RESOLV_KEYWORDS];
char word[LDNS_MAX_LINELEN + 1];
int8_t expect;
uint8_t i;
ldns_rdf *tmp;
#ifdef HAVE_SSL
ldns_rr *tmp_rr;
#endif
ssize_t gtr, bgtr;
ldns_buffer *b;
int lnr = 0, oldline;
if(!line_nr) line_nr = &lnr;
/* do this better
* expect =
* 0: keyword
* 1: default domain dname
* 2: NS aaaa or a record
*/
/* recognized keywords */
keyword[LDNS_RESOLV_NAMESERVER] = "nameserver";
keyword[LDNS_RESOLV_DEFDOMAIN] = "domain";
keyword[LDNS_RESOLV_SEARCH] = "search";
/* these two are read but not used atm TODO */
keyword[LDNS_RESOLV_SORTLIST] = "sortlist";
keyword[LDNS_RESOLV_OPTIONS] = "options";
keyword[LDNS_RESOLV_ANCHOR] = "anchor";
expect = LDNS_RESOLV_KEYWORD;
r = ldns_resolver_new();
if (!r) {
return LDNS_STATUS_MEM_ERR;
}
gtr = 1;
word[0] = 0;
oldline = *line_nr;
expect = LDNS_RESOLV_KEYWORD;
while (gtr > 0) {
/* check comments */
if (word[0] == '#') {
word[0]='x';
if(oldline == *line_nr) {
/* skip until end of line */
int c;
do {
c = fgetc(fp);
} while(c != EOF && c != '\n');
if(c=='\n' && line_nr) (*line_nr)++;
}
/* and read next to prepare for further parsing */
oldline = *line_nr;
continue;
}
oldline = *line_nr;
switch(expect) {
case LDNS_RESOLV_KEYWORD:
/* keyword */
gtr = ldns_fget_token_l(fp, word, LDNS_PARSE_NORMAL, 0, line_nr);
if (gtr != 0) {
if(word[0] == '#') continue;
for(i = 0; i < LDNS_RESOLV_KEYWORDS; i++) {
if (strcasecmp(keyword[i], word) == 0) {
/* chosen the keyword and
* expect values carefully
*/
expect = i;
break;
}
}
/* no keyword recognized */
if (expect == LDNS_RESOLV_KEYWORD) {
/* skip line */
/*
ldns_resolver_deep_free(r);
return LDNS_STATUS_SYNTAX_KEYWORD_ERR;
*/
}
}
break;
case LDNS_RESOLV_DEFDOMAIN:
/* default domain dname */
gtr = ldns_fget_token_l(fp, word, LDNS_PARSE_NORMAL, 0, line_nr);
if (gtr == 0) {
return LDNS_STATUS_SYNTAX_MISSING_VALUE_ERR;
}
if(word[0] == '#') {
expect = LDNS_RESOLV_KEYWORD;
continue;
}
tmp = ldns_rdf_new_frm_str(LDNS_RDF_TYPE_DNAME, word);
if (!tmp) {
ldns_resolver_deep_free(r);
return LDNS_STATUS_SYNTAX_DNAME_ERR;
}
/* DOn't free, because we copy the pointer */
ldns_resolver_set_domain(r, tmp);
expect = LDNS_RESOLV_KEYWORD;
break;
case LDNS_RESOLV_NAMESERVER:
/* NS aaaa or a record */
gtr = ldns_fget_token_l(fp, word, LDNS_PARSE_NORMAL, 0, line_nr);
if (gtr == 0) {
return LDNS_STATUS_SYNTAX_MISSING_VALUE_ERR;
}
if(word[0] == '#') {
expect = LDNS_RESOLV_KEYWORD;
continue;
}
if(strchr(word, '%')) {
/* snip off interface labels,
* fe80::222:19ff:fe31:4222%eth0 */
strchr(word, '%')[0]=0;
}
tmp = ldns_rdf_new_frm_str(LDNS_RDF_TYPE_AAAA, word);
if (!tmp) {
/* try ip4 */
tmp = ldns_rdf_new_frm_str(LDNS_RDF_TYPE_A, word);
}
/* could not parse it, exit */
if (!tmp) {
ldns_resolver_deep_free(r);
return LDNS_STATUS_SYNTAX_ERR;
}
(void)ldns_resolver_push_nameserver(r, tmp);
ldns_rdf_deep_free(tmp);
expect = LDNS_RESOLV_KEYWORD;
break;
case LDNS_RESOLV_SEARCH:
/* search list domain dname */
gtr = ldns_fget_token_l(fp, word, LDNS_PARSE_SKIP_SPACE, 0, line_nr);
b = LDNS_MALLOC(ldns_buffer);
if(!b) {
ldns_resolver_deep_free(r);
return LDNS_STATUS_MEM_ERR;
}
ldns_buffer_new_frm_data(b, word, (size_t) gtr);
if(ldns_buffer_status(b) != LDNS_STATUS_OK) {
LDNS_FREE(b);
ldns_resolver_deep_free(r);
return LDNS_STATUS_MEM_ERR;
}
bgtr = ldns_bget_token(b, word, LDNS_PARSE_NORMAL, (size_t) gtr + 1);
while (bgtr > 0) {
gtr -= bgtr;
if(word[0] == '#') {
expect = LDNS_RESOLV_KEYWORD;
ldns_buffer_free(b);
continue;
}
tmp = ldns_rdf_new_frm_str(LDNS_RDF_TYPE_DNAME, word);
if (!tmp) {
ldns_resolver_deep_free(r);
ldns_buffer_free(b);
return LDNS_STATUS_SYNTAX_DNAME_ERR;
}
ldns_resolver_push_searchlist(r, tmp);
ldns_rdf_deep_free(tmp);
bgtr = ldns_bget_token(b, word, LDNS_PARSE_NORMAL,
(size_t) gtr + 1);
}
ldns_buffer_free(b);
gtr = 1;
expect = LDNS_RESOLV_KEYWORD;
break;
case LDNS_RESOLV_SORTLIST:
gtr = ldns_fget_token_l(fp, word, LDNS_PARSE_SKIP_SPACE, 0, line_nr);
/* sortlist not implemented atm */
expect = LDNS_RESOLV_KEYWORD;
break;
case LDNS_RESOLV_OPTIONS:
gtr = ldns_fget_token_l(fp, word, LDNS_PARSE_SKIP_SPACE, 0, line_nr);
/* options not implemented atm */
expect = LDNS_RESOLV_KEYWORD;
break;
case LDNS_RESOLV_ANCHOR:
/* a file containing a DNSSEC trust anchor */
gtr = ldns_fget_token_l(fp, word, LDNS_PARSE_NORMAL, 0, line_nr);
if (gtr == 0) {
ldns_resolver_deep_free(r);
return LDNS_STATUS_SYNTAX_MISSING_VALUE_ERR;
}
if(word[0] == '#') {
expect = LDNS_RESOLV_KEYWORD;
continue;
}
#ifdef HAVE_SSL
tmp_rr = ldns_read_anchor_file(word);
(void) ldns_resolver_push_dnssec_anchor(r, tmp_rr);
ldns_rr_free(tmp_rr);
#endif
expect = LDNS_RESOLV_KEYWORD;
break;
}
}
/* finally, add the root domain to the search list */
ldns_resolver_push_searchlist(r, ldns_dname_new_frm_str("."));
if (res) {
*res = r;
return LDNS_STATUS_OK;
} else {
ldns_resolver_deep_free(r);
return LDNS_STATUS_NULL;
}
}
ldns_status output_packet(ldns_buffer *output, const ldns_pkt *pkt, struct sockaddr_storage sa, lookup_context_t* context)
{
const ldns_output_format *fmt = ldns_output_format_nocomments;
uint16_t i;
ldns_status status = LDNS_STATUS_OK;
time_t now = time(NULL);
char nsbuffer[INET6_ADDRSTRLEN];
char* ip_prefix = "";
char* ip_suffix = "";
switch (((struct sockaddr *) &sa)->sa_family)
{
case AF_INET:
inet_ntop(AF_INET, &(((struct sockaddr_in *) &sa)->sin_addr), nsbuffer, INET_ADDRSTRLEN);
break;
case AF_INET6:
inet_ntop(AF_INET6, &(((struct sockaddr_in6 *) &sa)->sin6_addr), nsbuffer, INET6_ADDRSTRLEN);
ip_prefix = "[";
ip_suffix = "]";
break;
default:
exit(1);
}
if (!pkt)
{
if(0 > ldns_buffer_printf(output, ""))
{
abort();
}
return LDNS_STATUS_OK;
}
if(!context->cmd_args.only_responses)
{
if(0 > ldns_buffer_printf(output, "%s%s%s:%u %ld ", ip_prefix, ip_suffix, nsbuffer, ntohs(((struct sockaddr_in *) &sa)->sin_port), now))
{
abort();
}
for (i = 0; i < ldns_pkt_qdcount(pkt); i++)
{
status = ldns_rr2buffer_str_fmt(output, fmt, ldns_rr_list_rr(ldns_pkt_question(pkt), i));
if (status != LDNS_STATUS_OK)
{
return status;
}
}
}
if (ldns_buffer_status_ok(output))
{
for (i = 0; i < ldns_pkt_ancount(pkt); i++)
{
if(!context->cmd_args.only_responses)
{
if(0 > ldns_buffer_printf(output, "\t"))
{
abort();
}
}
status = ldns_rr2buffer_str_fmt(output, fmt, ldns_rr_list_rr(ldns_pkt_answer(pkt), i));
if (status != LDNS_STATUS_OK)
{
return status;
}
}
if(!context->cmd_args.no_authority)
{
if(0 > ldns_buffer_printf(output, "\n"))
{
abort();
}
for (i = 0; i < ldns_pkt_nscount(pkt); i++)
{
if(!context->cmd_args.only_responses)
{
ldns_buffer_printf(output, "\t");
}
status = ldns_rr2buffer_str_fmt(output, fmt, ldns_rr_list_rr(ldns_pkt_authority(pkt), i));
if (status != LDNS_STATUS_OK)
{
return status;
}
}
}
if(context->cmd_args.additional)
{
for (i = 0; i < ldns_pkt_arcount(pkt); i++)
{
if(!context->cmd_args.only_responses)
{
ldns_buffer_printf(output, "\t");
}
status = ldns_rr2buffer_str_fmt(output, fmt, ldns_rr_list_rr(ldns_pkt_additional(pkt), i));
if (status != LDNS_STATUS_OK)
{
return status;
}
}
}
}
else
{
return ldns_buffer_status(output);
}
return status;
}