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Diffstat (limited to 'external/unbound/iterator/iter_hints.c')
-rw-r--r--external/unbound/iterator/iter_hints.c546
1 files changed, 0 insertions, 546 deletions
diff --git a/external/unbound/iterator/iter_hints.c b/external/unbound/iterator/iter_hints.c
deleted file mode 100644
index 74869d355..000000000
--- a/external/unbound/iterator/iter_hints.c
+++ /dev/null
@@ -1,546 +0,0 @@
-/*
- * iterator/iter_hints.c - iterative resolver module stub and root hints.
- *
- * Copyright (c) 2007, NLnet Labs. All rights reserved.
- *
- * This software is open source.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of the NLNET LABS nor the names of its contributors may
- * be used to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/**
- * \file
- *
- * This file contains functions to assist the iterator module.
- * Keep track of stub and root hints, and read those from config.
- */
-#include "config.h"
-#include "iterator/iter_hints.h"
-#include "iterator/iter_delegpt.h"
-#include "util/log.h"
-#include "util/config_file.h"
-#include "util/net_help.h"
-#include "util/data/dname.h"
-#include "sldns/rrdef.h"
-#include "sldns/str2wire.h"
-#include "sldns/wire2str.h"
-
-struct iter_hints*
-hints_create(void)
-{
- struct iter_hints* hints = (struct iter_hints*)calloc(1,
- sizeof(struct iter_hints));
- if(!hints)
- return NULL;
- return hints;
-}
-
-static void hints_stub_free(struct iter_hints_stub* s)
-{
- if(!s) return;
- delegpt_free_mlc(s->dp);
- free(s);
-}
-
-static void delhintnode(rbnode_type* n, void* ATTR_UNUSED(arg))
-{
- struct iter_hints_stub* node = (struct iter_hints_stub*)n;
- hints_stub_free(node);
-}
-
-static void hints_del_tree(struct iter_hints* hints)
-{
- traverse_postorder(&hints->tree, &delhintnode, NULL);
-}
-
-void
-hints_delete(struct iter_hints* hints)
-{
- if(!hints)
- return;
- hints_del_tree(hints);
- free(hints);
-}
-
-/** add hint to delegation hints */
-static int
-ah(struct delegpt* dp, const char* sv, const char* ip)
-{
- struct sockaddr_storage addr;
- socklen_t addrlen;
- size_t dname_len;
- uint8_t* dname = sldns_str2wire_dname(sv, &dname_len);
- if(!dname) {
- log_err("could not parse %s", sv);
- return 0;
- }
- if(!delegpt_add_ns_mlc(dp, dname, 0) ||
- !extstrtoaddr(ip, &addr, &addrlen) ||
- !delegpt_add_target_mlc(dp, dname, dname_len,
- &addr, addrlen, 0, 0)) {
- free(dname);
- return 0;
- }
- free(dname);
- 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;
-}
-
-/** 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)) {
- char buf[257];
- dname_str(dp->name, buf);
- log_err("second hints for zone %s ignored.", buf);
- delegpt_free_mlc(dp);
- free(node);
- }
- return 1;
-}
-
-/** set stub name */
-static struct delegpt*
-read_stubs_name(struct config_stub* s)
-{
- struct delegpt* dp;
- size_t dname_len;
- uint8_t* dname;
- if(!s->name) {
- log_err("stub zone without a name");
- return NULL;
- }
- dname = sldns_str2wire_dname(s->name, &dname_len);
- if(!dname) {
- log_err("cannot parse stub zone name %s", s->name);
- return NULL;
- }
- if(!(dp=delegpt_create_mlc(dname))) {
- free(dname);
- log_err("out of memory");
- return NULL;
- }
- free(dname);
- return dp;
-}
-
-/** set stub host names */
-static int
-read_stubs_host(struct config_stub* s, struct delegpt* dp)
-{
- struct config_strlist* p;
- size_t dname_len;
- uint8_t* dname;
- for(p = s->hosts; p; p = p->next) {
- log_assert(p->str);
- dname = sldns_str2wire_dname(p->str, &dname_len);
- if(!dname) {
- log_err("cannot parse stub %s nameserver name: '%s'",
- s->name, p->str);
- return 0;
- }
- if(!delegpt_add_ns_mlc(dp, dname, 0)) {
- free(dname);
- log_err("out of memory");
- return 0;
- }
- free(dname);
- }
- return 1;
-}
-
-/** set stub server addresses */
-static int
-read_stubs_addr(struct config_stub* s, struct delegpt* dp)
-{
- struct config_strlist* p;
- struct sockaddr_storage addr;
- socklen_t addrlen;
- for(p = s->addrs; p; p = p->next) {
- log_assert(p->str);
- if(!extstrtoaddr(p->str, &addr, &addrlen)) {
- log_err("cannot parse stub %s ip address: '%s'",
- s->name, p->str);
- return 0;
- }
- if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0)) {
- log_err("out of memory");
- return 0;
- }
- }
- return 1;
-}
-
-/** 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;
- /* ssl_upstream */
- dp->ssl_upstream = (uint8_t)s->ssl_upstream;
- delegpt_log(VERB_QUERY, dp);
- if(!hints_insert(hints, LDNS_RR_CLASS_IN, dp, !s->isprime))
- return 0;
- }
- return 1;
-}
-
-/** 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 list */
-static int
-read_root_hints_list(struct iter_hints* hints, struct config_file* cfg)
-{
- struct config_strlist* p;
- for(p = cfg->root_hints; p; p = p->next) {
- log_assert(p->str);
- if(p->str && p->str[0]) {
- char* f = p->str;
- if(cfg->chrootdir && cfg->chrootdir[0] &&
- strncmp(p->str, cfg->chrootdir,
- strlen(cfg->chrootdir)) == 0)
- f += strlen(cfg->chrootdir);
- if(!read_root_hints(hints, f))
- return 0;
- }
- }
- return 1;
-}
-
-int
-hints_apply_cfg(struct iter_hints* hints, struct config_file* cfg)
-{
- hints_del_tree(hints);
- name_tree_init(&hints->tree);
-
- /* read root hints */
- if(!read_root_hints_list(hints, cfg))
- return 0;
-
- /* read stub hints */
- if(!read_stubs(hints, cfg))
- return 0;
-
- /* use fallback compiletime root hints */
- if(!hints_lookup_root(hints, LDNS_RR_CLASS_IN)) {
- struct delegpt* dp = compile_time_root_prime(cfg->do_ip4,
- cfg->do_ip6);
- verbose(VERB_ALGO, "no config, using builtin root hints.");
- if(!dp)
- return 0;
- if(!hints_insert(hints, LDNS_RR_CLASS_IN, dp, 0))
- return 0;
- }
-
- name_tree_init_parents(&hints->tree);
- return 1;
-}
-
-struct delegpt*
-hints_lookup_root(struct iter_hints* hints, uint16_t qclass)
-{
- uint8_t rootlab = 0;
- struct iter_hints_stub *stub;
- stub = (struct iter_hints_stub*)name_tree_find(&hints->tree,
- &rootlab, 1, 1, qclass);
- if(!stub)
- return NULL;
- return stub->dp;
-}
-
-struct iter_hints_stub*
-hints_lookup_stub(struct iter_hints* hints, uint8_t* qname,
- uint16_t qclass, struct delegpt* cache_dp)
-{
- size_t len;
- int labs;
- struct iter_hints_stub *r;
-
- /* first lookup the stub */
- labs = dname_count_size_labels(qname, &len);
- r = (struct iter_hints_stub*)name_tree_lookup(&hints->tree, qname,
- len, labs, qclass);
- if(!r) return NULL;
-
- /* If there is no cache (root prime situation) */
- if(cache_dp == NULL) {
- if(r->dp->namelabs != 1)
- return r; /* no cache dp, use any non-root stub */
- return NULL;
- }
-
- /*
- * If the stub is same as the delegation we got
- * And has noprime set, we need to 'prime' to use this stub instead.
- */
- if(r->noprime && query_dname_compare(cache_dp->name, r->dp->name)==0)
- return r; /* use this stub instead of cached dp */
-
- /*
- * If our cached delegation point is above the hint, we need to prime.
- */
- if(dname_strict_subdomain(r->dp->name, r->dp->namelabs,
- cache_dp->name, cache_dp->namelabs))
- return r; /* need to prime this stub */
- return NULL;
-}
-
-int hints_next_root(struct iter_hints* hints, uint16_t* qclass)
-{
- return name_tree_next_root(&hints->tree, qclass);
-}
-
-size_t
-hints_get_mem(struct iter_hints* hints)
-{
- size_t s;
- struct iter_hints_stub* p;
- if(!hints) return 0;
- s = sizeof(*hints);
- RBTREE_FOR(p, struct iter_hints_stub*, &hints->tree) {
- s += sizeof(*p) + delegpt_get_mem(p->dp);
- }
- return s;
-}
-
-int
-hints_add_stub(struct iter_hints* hints, uint16_t c, struct delegpt* dp,
- int noprime)
-{
- struct iter_hints_stub *z;
- if((z=(struct iter_hints_stub*)name_tree_find(&hints->tree,
- dp->name, dp->namelen, dp->namelabs, c)) != NULL) {
- (void)rbtree_delete(&hints->tree, &z->node);
- hints_stub_free(z);
- }
- if(!hints_insert(hints, c, dp, noprime))
- return 0;
- name_tree_init_parents(&hints->tree);
- return 1;
-}
-
-void
-hints_delete_stub(struct iter_hints* hints, uint16_t c, uint8_t* nm)
-{
- struct iter_hints_stub *z;
- size_t len;
- int labs = dname_count_size_labels(nm, &len);
- if(!(z=(struct iter_hints_stub*)name_tree_find(&hints->tree,
- nm, len, labs, c)))
- return; /* nothing to do */
- (void)rbtree_delete(&hints->tree, &z->node);
- hints_stub_free(z);
- name_tree_init_parents(&hints->tree);
-}
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 17:38:55 +0000