/** insert info into forward structure */
static int
forwards_insert_data(struct iter_forwards* fwd, uint16_t c, uint8_t* nm,
size_t nmlen, int nmlabs, struct delegpt* dp)
{
struct iter_forward_zone* node = (struct iter_forward_zone*)malloc(
sizeof(struct iter_forward_zone));
if(!node) {
delegpt_free_mlc(dp);
return 0;
}
node->node.key = node;
node->dclass = c;
node->name = memdup(nm, nmlen);
if(!node->name) {
delegpt_free_mlc(dp);
free(node);
return 0;
}
node->namelen = nmlen;
node->namelabs = nmlabs;
node->dp = dp;
if(!rbtree_insert(fwd->tree, &node->node)) {
log_err("duplicate forward zone ignored.");
delegpt_free_mlc(dp);
free(node->name);
free(node);
}
return 1;
}
static void fwd_zone_free(struct iter_forward_zone* n)
{
if(!n) return;
delegpt_free_mlc(n->dp);
free(n->name);
free(n);
}
/** read forwards config */
static int
read_forwards(struct iter_forwards* fwd, struct config_file* cfg)
{
struct config_stub* s;
for(s = cfg->forwards; s; s = s->next) {
struct delegpt* dp;
if(!(dp=read_fwds_name(s)))
return 0;
if(!read_fwds_host(s, dp) || !read_fwds_addr(s, dp)) {
delegpt_free_mlc(dp);
return 0;
}
/* set flag that parent side NS information is included.
* Asking a (higher up) server on the internet is not useful */
/* the flag is turned off for 'forward-first' so that the
* last resort will ask for parent-side NS record and thus
* fallback to the internet name servers on a failure */
dp->has_parent_side_NS = (uint8_t)!s->isfirst;
verbose(VERB_QUERY, "Forward zone server list:");
delegpt_log(VERB_QUERY, dp);
if(!forwards_insert(fwd, LDNS_RR_CLASS_IN, dp))
return 0;
}
return 1;
}
/** insert new hint info into hint structure */
static int
hints_insert(struct iter_hints* hints, uint16_t c, struct delegpt* dp,
int noprime)
{
struct iter_hints_stub* node = (struct iter_hints_stub*)malloc(
sizeof(struct iter_hints_stub));
if(!node) {
delegpt_free_mlc(dp);
return 0;
}
node->dp = dp;
node->noprime = (uint8_t)noprime;
if(!name_tree_insert(&hints->tree, &node->node, dp->name, dp->namelen,
dp->namelabs, c)) {
log_err("second hints ignored.");
delegpt_free_mlc(dp);
free(node);
}
return 1;
}
/** obtain compiletime provided root hints */
static struct delegpt*
compile_time_root_prime(int do_ip4, int do_ip6)
{
/* from:
; This file is made available by InterNIC
; under anonymous FTP as
; file /domain/named.cache
; on server FTP.INTERNIC.NET
; -OR- RS.INTERNIC.NET
;
; related version of root zone: changes-on-20120103
*/
struct delegpt* dp = delegpt_create_mlc((uint8_t*)"\000");
if(!dp)
return NULL;
dp->has_parent_side_NS = 1;
if(do_ip4) {
if(!ah(dp, "A.ROOT-SERVERS.NET.", "198.41.0.4")) goto failed;
if(!ah(dp, "B.ROOT-SERVERS.NET.", "192.228.79.201")) goto failed;
if(!ah(dp, "C.ROOT-SERVERS.NET.", "192.33.4.12")) goto failed;
if(!ah(dp, "D.ROOT-SERVERS.NET.", "199.7.91.13")) goto failed;
if(!ah(dp, "E.ROOT-SERVERS.NET.", "192.203.230.10")) goto failed;
if(!ah(dp, "F.ROOT-SERVERS.NET.", "192.5.5.241")) goto failed;
if(!ah(dp, "G.ROOT-SERVERS.NET.", "192.112.36.4")) goto failed;
if(!ah(dp, "H.ROOT-SERVERS.NET.", "198.97.190.53")) goto failed;
if(!ah(dp, "I.ROOT-SERVERS.NET.", "192.36.148.17")) goto failed;
if(!ah(dp, "J.ROOT-SERVERS.NET.", "192.58.128.30")) goto failed;
if(!ah(dp, "K.ROOT-SERVERS.NET.", "193.0.14.129")) goto failed;
if(!ah(dp, "L.ROOT-SERVERS.NET.", "199.7.83.42")) goto failed;
if(!ah(dp, "M.ROOT-SERVERS.NET.", "202.12.27.33")) goto failed;
}
if(do_ip6) {
if(!ah(dp, "A.ROOT-SERVERS.NET.", "2001:503:ba3e::2:30")) goto failed;
if(!ah(dp, "B.ROOT-SERVERS.NET.", "2001:500:84::b")) goto failed;
if(!ah(dp, "C.ROOT-SERVERS.NET.", "2001:500:2::c")) goto failed;
if(!ah(dp, "D.ROOT-SERVERS.NET.", "2001:500:2d::d")) goto failed;
if(!ah(dp, "E.ROOT-SERVERS.NET.", "2001:500:a8::e")) goto failed;
if(!ah(dp, "F.ROOT-SERVERS.NET.", "2001:500:2f::f")) goto failed;
if(!ah(dp, "G.ROOT-SERVERS.NET.", "2001:500:12::d0d")) goto failed;
if(!ah(dp, "H.ROOT-SERVERS.NET.", "2001:500:1::53")) goto failed;
if(!ah(dp, "I.ROOT-SERVERS.NET.", "2001:7fe::53")) goto failed;
if(!ah(dp, "J.ROOT-SERVERS.NET.", "2001:503:c27::2:30")) goto failed;
if(!ah(dp, "K.ROOT-SERVERS.NET.", "2001:7fd::1")) goto failed;
if(!ah(dp, "L.ROOT-SERVERS.NET.", "2001:500:9f::42")) goto failed;
if(!ah(dp, "M.ROOT-SERVERS.NET.", "2001:dc3::35")) goto failed;
}
return dp;
failed:
delegpt_free_mlc(dp);
return 0;
}
/** read stubs config */
static int
read_stubs(struct iter_hints* hints, struct config_file* cfg)
{
struct config_stub* s;
struct delegpt* dp;
for(s = cfg->stubs; s; s = s->next) {
if(!(dp=read_stubs_name(s)))
return 0;
if(!read_stubs_host(s, dp) || !read_stubs_addr(s, dp)) {
delegpt_free_mlc(dp);
return 0;
}
/* the flag is turned off for 'stub-first' so that the
* last resort will ask for parent-side NS record and thus
* fallback to the internet name servers on a failure */
dp->has_parent_side_NS = (uint8_t)!s->isfirst;
delegpt_log(VERB_QUERY, dp);
if(!hints_insert(hints, LDNS_RR_CLASS_IN, dp, !s->isprime))
return 0;
}
return 1;
}
static void hints_stub_free(struct iter_hints_stub* s)
{
if(!s) return;
delegpt_free_mlc(s->dp);
free(s);
}
/** read root hints from file */
static int
read_root_hints(struct iter_hints* hints, char* fname)
{
struct sldns_file_parse_state pstate;
struct delegpt* dp;
uint8_t rr[LDNS_RR_BUF_SIZE];
size_t rr_len, dname_len;
int status;
uint16_t c = LDNS_RR_CLASS_IN;
FILE* f = fopen(fname, "r");
if(!f) {
log_err("could not read root hints %s: %s",
fname, strerror(errno));
return 0;
}
dp = delegpt_create_mlc(NULL);
if(!dp) {
log_err("out of memory reading root hints");
fclose(f);
return 0;
}
verbose(VERB_QUERY, "Reading root hints from %s", fname);
memset(&pstate, 0, sizeof(pstate));
pstate.lineno = 1;
dp->has_parent_side_NS = 1;
while(!feof(f)) {
rr_len = sizeof(rr);
dname_len = 0;
status = sldns_fp2wire_rr_buf(f, rr, &rr_len, &dname_len,
&pstate);
if(status != 0) {
log_err("reading root hints %s %d:%d: %s", fname,
pstate.lineno, LDNS_WIREPARSE_OFFSET(status),
sldns_get_errorstr_parse(status));
goto stop_read;
}
if(rr_len == 0)
continue; /* EMPTY line, TTL or ORIGIN */
if(sldns_wirerr_get_type(rr, rr_len, dname_len)
== LDNS_RR_TYPE_NS) {
if(!delegpt_add_ns_mlc(dp, sldns_wirerr_get_rdata(rr,
rr_len, dname_len), 0)) {
log_err("out of memory reading root hints");
goto stop_read;
}
c = sldns_wirerr_get_class(rr, rr_len, dname_len);
if(!dp->name) {
if(!delegpt_set_name_mlc(dp, rr)) {
log_err("out of memory.");
goto stop_read;
}
}
} else if(sldns_wirerr_get_type(rr, rr_len, dname_len)
== LDNS_RR_TYPE_A && sldns_wirerr_get_rdatalen(rr,
rr_len, dname_len) == INET_SIZE) {
struct sockaddr_in sa;
socklen_t len = (socklen_t)sizeof(sa);
memset(&sa, 0, len);
sa.sin_family = AF_INET;
sa.sin_port = (in_port_t)htons(UNBOUND_DNS_PORT);
memmove(&sa.sin_addr,
sldns_wirerr_get_rdata(rr, rr_len, dname_len),
INET_SIZE);
if(!delegpt_add_target_mlc(dp, rr, dname_len,
(struct sockaddr_storage*)&sa, len,
0, 0)) {
log_err("out of memory reading root hints");
goto stop_read;
}
} else if(sldns_wirerr_get_type(rr, rr_len, dname_len)
== LDNS_RR_TYPE_AAAA && sldns_wirerr_get_rdatalen(rr,
rr_len, dname_len) == INET6_SIZE) {
struct sockaddr_in6 sa;
socklen_t len = (socklen_t)sizeof(sa);
memset(&sa, 0, len);
sa.sin6_family = AF_INET6;
sa.sin6_port = (in_port_t)htons(UNBOUND_DNS_PORT);
memmove(&sa.sin6_addr,
sldns_wirerr_get_rdata(rr, rr_len, dname_len),
INET6_SIZE);
if(!delegpt_add_target_mlc(dp, rr, dname_len,
(struct sockaddr_storage*)&sa, len,
0, 0)) {
log_err("out of memory reading root hints");
goto stop_read;
}
} else {
char buf[17];
sldns_wire2str_type_buf(sldns_wirerr_get_type(rr,
rr_len, dname_len), buf, sizeof(buf));
log_warn("root hints %s:%d skipping type %s",
fname, pstate.lineno, buf);
}
}
fclose(f);
if(!dp->name) {
log_warn("root hints %s: no NS content", fname);
delegpt_free_mlc(dp);
return 1;
}
if(!hints_insert(hints, c, dp, 0)) {
return 0;
}
delegpt_log(VERB_QUERY, dp);
return 1;
stop_read:
delegpt_free_mlc(dp);
fclose(f);
return 0;
}
/** read root hints from file */
static int
read_root_hints(struct iter_hints* hints, char* fname)
{
int lineno = 0;
uint32_t default_ttl = 0;
ldns_rdf* origin = NULL;
ldns_rdf* prev_rr = NULL;
struct delegpt* dp;
ldns_rr* rr = NULL;
ldns_status status;
uint16_t c = LDNS_RR_CLASS_IN;
FILE* f = fopen(fname, "r");
if(!f) {
log_err("could not read root hints %s: %s",
fname, strerror(errno));
return 0;
}
dp = delegpt_create_mlc(NULL);
if(!dp) {
log_err("out of memory reading root hints");
fclose(f);
return 0;
}
verbose(VERB_QUERY, "Reading root hints from %s", fname);
dp->has_parent_side_NS = 1;
while(!feof(f)) {
status = ldns_rr_new_frm_fp_l(&rr, f,
&default_ttl, &origin, &prev_rr, &lineno);
if(status == LDNS_STATUS_SYNTAX_EMPTY ||
status == LDNS_STATUS_SYNTAX_TTL ||
status == LDNS_STATUS_SYNTAX_ORIGIN)
continue;
if(status != LDNS_STATUS_OK) {
log_err("reading root hints %s %d: %s", fname,
lineno, ldns_get_errorstr_by_id(status));
goto stop_read;
}
if(ldns_rr_get_type(rr) == LDNS_RR_TYPE_NS) {
if(!delegpt_add_ns_mlc(dp,
ldns_rdf_data(ldns_rr_rdf(rr, 0)), 0)) {
log_err("out of memory reading root hints");
goto stop_read;
}
c = ldns_rr_get_class(rr);
if(!dp->name) {
if(!delegpt_set_name_mlc(dp,
ldns_rdf_data(ldns_rr_owner(rr)))){
log_err("out of memory.");
goto stop_read;
}
}
} else if(ldns_rr_get_type(rr) == LDNS_RR_TYPE_A) {
struct sockaddr_in sa;
socklen_t len = (socklen_t)sizeof(sa);
memset(&sa, 0, len);
sa.sin_family = AF_INET;
sa.sin_port = (in_port_t)htons(UNBOUND_DNS_PORT);
memmove(&sa.sin_addr,
ldns_rdf_data(ldns_rr_rdf(rr, 0)), INET_SIZE);
if(!delegpt_add_target_mlc(dp,
ldns_rdf_data(ldns_rr_owner(rr)),
ldns_rdf_size(ldns_rr_owner(rr)),
(struct sockaddr_storage*)&sa, len,
0, 0)) {
log_err("out of memory reading root hints");
goto stop_read;
}
} else if(ldns_rr_get_type(rr) == LDNS_RR_TYPE_AAAA) {
struct sockaddr_in6 sa;
socklen_t len = (socklen_t)sizeof(sa);
memset(&sa, 0, len);
sa.sin6_family = AF_INET6;
sa.sin6_port = (in_port_t)htons(UNBOUND_DNS_PORT);
memmove(&sa.sin6_addr,
ldns_rdf_data(ldns_rr_rdf(rr, 0)), INET6_SIZE);
if(!delegpt_add_target_mlc(dp,
ldns_rdf_data(ldns_rr_owner(rr)),
ldns_rdf_size(ldns_rr_owner(rr)),
(struct sockaddr_storage*)&sa, len,
0, 0)) {
log_err("out of memory reading root hints");
goto stop_read;
}
} else {
log_warn("root hints %s:%d skipping type %d",
fname, lineno, ldns_rr_get_type(rr));
}
ldns_rr_free(rr);
}
if (origin)
ldns_rdf_deep_free(origin);
if (prev_rr)
ldns_rdf_deep_free(prev_rr);
fclose(f);
if(!dp->name) {
log_warn("root hints %s: no NS content", fname);
delegpt_free_mlc(dp);
return 1;
}
if(!hints_insert(hints, c, dp, 0)) {
return 0;
}
delegpt_log(VERB_QUERY, dp);
return 1;
stop_read:
if (origin)
ldns_rdf_deep_free(origin);
if (prev_rr)
ldns_rdf_deep_free(prev_rr);
delegpt_free_mlc(dp);
fclose(f);
return 0;
}