diff options
Diffstat (limited to 'src/resolve/resolved-dns-rr.c')
| -rw-r--r-- | src/resolve/resolved-dns-rr.c | 698 |
1 files changed, 0 insertions, 698 deletions
diff --git a/src/resolve/resolved-dns-rr.c b/src/resolve/resolved-dns-rr.c deleted file mode 100644 index 78d9e4a412..0000000000 --- a/src/resolve/resolved-dns-rr.c +++ /dev/null @@ -1,698 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2014 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <math.h> - -#include "strv.h" - -#include "resolved-dns-domain.h" -#include "resolved-dns-rr.h" -#include "resolved-dns-packet.h" -#include "dns-type.h" - -DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { - DnsResourceKey *k; - size_t l; - - assert(name); - - l = strlen(name); - k = malloc0(sizeof(DnsResourceKey) + l + 1); - if (!k) - return NULL; - - k->n_ref = 1; - k->class = class; - k->type = type; - - strcpy((char*) k + sizeof(DnsResourceKey), name); - - return k; -} - -DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { - DnsResourceKey *k; - - assert(name); - - k = new0(DnsResourceKey, 1); - if (!k) - return NULL; - - k->n_ref = 1; - k->class = class; - k->type = type; - k->_name = name; - - return k; -} - -DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { - - if (!k) - return NULL; - - assert(k->n_ref > 0); - k->n_ref++; - - return k; -} - -DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { - if (!k) - return NULL; - - assert(k->n_ref > 0); - - if (k->n_ref == 1) { - free(k->_name); - free(k); - } else - k->n_ref--; - - return NULL; -} - -int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { - int r; - - r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b)); - if (r <= 0) - return r; - - if (a->class != b->class) - return 0; - - if (a->type != b->type) - return 0; - - return 1; -} - -int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr) { - assert(key); - assert(rr); - - if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) - return 0; - - if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) - return 0; - - return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); -} - -int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr) { - assert(key); - assert(rr); - - if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) - return 0; - - if (rr->key->type != DNS_TYPE_CNAME) - return 0; - - return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); -} - -static unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]) { - const DnsResourceKey *k = i; - unsigned long ul; - - ul = dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), hash_key); - ul = ul * hash_key[0] + ul + k->class; - ul = ul * hash_key[1] + ul + k->type; - - return ul; -} - -static int dns_resource_key_compare_func(const void *a, const void *b) { - const DnsResourceKey *x = a, *y = b; - int ret; - - ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); - if (ret != 0) - return ret; - - if (x->type < y->type) - return -1; - if (x->type > y->type) - return 1; - - if (x->class < y->class) - return -1; - if (x->class > y->class) - return 1; - - return 0; -} - -const struct hash_ops dns_resource_key_hash_ops = { - .hash = dns_resource_key_hash_func, - .compare = dns_resource_key_compare_func -}; - -int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { - char cbuf[DECIMAL_STR_MAX(uint16_t)], tbuf[DECIMAL_STR_MAX(uint16_t)]; - const char *c, *t; - char *s; - - c = dns_class_to_string(key->class); - if (!c) { - sprintf(cbuf, "%i", key->class); - c = cbuf; - } - - t = dns_type_to_string(key->type); - if (!t){ - sprintf(tbuf, "%i", key->type); - t = tbuf; - } - - if (asprintf(&s, "%s %s %-5s", DNS_RESOURCE_KEY_NAME(key), c, t) < 0) - return -ENOMEM; - - *ret = s; - return 0; -} - -DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { - DnsResourceRecord *rr; - - rr = new0(DnsResourceRecord, 1); - if (!rr) - return NULL; - - rr->n_ref = 1; - rr->key = dns_resource_key_ref(key); - - return rr; -} - -DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { - _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; - - key = dns_resource_key_new(class, type, name); - if (!key) - return NULL; - - return dns_resource_record_new(key); -} - -DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { - if (!rr) - return NULL; - - assert(rr->n_ref > 0); - rr->n_ref++; - - return rr; -} - -DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { - if (!rr) - return NULL; - - assert(rr->n_ref > 0); - - if (rr->n_ref > 1) { - rr->n_ref--; - return NULL; - } - - if (rr->key) { - switch(rr->key->type) { - - case DNS_TYPE_SRV: - free(rr->srv.name); - break; - - case DNS_TYPE_PTR: - case DNS_TYPE_NS: - case DNS_TYPE_CNAME: - case DNS_TYPE_DNAME: - free(rr->ptr.name); - break; - - case DNS_TYPE_HINFO: - free(rr->hinfo.cpu); - free(rr->hinfo.os); - break; - - case DNS_TYPE_TXT: - case DNS_TYPE_SPF: - strv_free(rr->txt.strings); - break; - - case DNS_TYPE_SOA: - free(rr->soa.mname); - free(rr->soa.rname); - break; - - case DNS_TYPE_MX: - free(rr->mx.exchange); - break; - - case DNS_TYPE_SSHFP: - free(rr->sshfp.key); - break; - - case DNS_TYPE_DNSKEY: - free(rr->dnskey.key); - break; - - case DNS_TYPE_RRSIG: - free(rr->rrsig.signer); - free(rr->rrsig.signature); - break; - - case DNS_TYPE_LOC: - case DNS_TYPE_A: - case DNS_TYPE_AAAA: - break; - - default: - free(rr->generic.data); - } - - dns_resource_key_unref(rr->key); - } - - free(rr); - - return NULL; -} - -int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { - _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; - _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; - _cleanup_free_ char *ptr = NULL; - int r; - - assert(ret); - assert(address); - assert(hostname); - - r = dns_name_reverse(family, address, &ptr); - if (r < 0) - return r; - - key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); - if (!key) - return -ENOMEM; - - ptr = NULL; - - rr = dns_resource_record_new(key); - if (!rr) - return -ENOMEM; - - rr->ptr.name = strdup(hostname); - if (!rr->ptr.name) - return -ENOMEM; - - *ret = rr; - rr = NULL; - - return 0; -} - -int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { - int r; - - assert(a); - assert(b); - - r = dns_resource_key_equal(a->key, b->key); - if (r <= 0) - return r; - - if (a->unparseable != b->unparseable) - return 0; - - switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { - - case DNS_TYPE_SRV: - r = dns_name_equal(a->srv.name, b->srv.name); - if (r <= 0) - return r; - - return a->srv.priority == b->srv.priority && - a->srv.weight == b->srv.weight && - a->srv.port == b->srv.port; - - case DNS_TYPE_PTR: - case DNS_TYPE_NS: - case DNS_TYPE_CNAME: - case DNS_TYPE_DNAME: - return dns_name_equal(a->ptr.name, b->ptr.name); - - case DNS_TYPE_HINFO: - return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && - strcaseeq(a->hinfo.os, b->hinfo.os); - - case DNS_TYPE_SPF: /* exactly the same as TXT */ - case DNS_TYPE_TXT: - return strv_equal(a->txt.strings, b->txt.strings); - - case DNS_TYPE_A: - return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; - - case DNS_TYPE_AAAA: - return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; - - case DNS_TYPE_SOA: - r = dns_name_equal(a->soa.mname, b->soa.mname); - if (r <= 0) - return r; - r = dns_name_equal(a->soa.rname, b->soa.rname); - if (r <= 0) - return r; - - return a->soa.serial == b->soa.serial && - a->soa.refresh == b->soa.refresh && - a->soa.retry == b->soa.retry && - a->soa.expire == b->soa.expire && - a->soa.minimum == b->soa.minimum; - - case DNS_TYPE_MX: - if (a->mx.priority != b->mx.priority) - return 0; - - return dns_name_equal(a->mx.exchange, b->mx.exchange); - - case DNS_TYPE_LOC: - assert(a->loc.version == b->loc.version); - - return a->loc.size == b->loc.size && - a->loc.horiz_pre == b->loc.horiz_pre && - a->loc.vert_pre == b->loc.vert_pre && - a->loc.latitude == b->loc.latitude && - a->loc.longitude == b->loc.longitude && - a->loc.altitude == b->loc.altitude; - - case DNS_TYPE_SSHFP: - return a->sshfp.algorithm == b->sshfp.algorithm && - a->sshfp.fptype == b->sshfp.fptype && - a->sshfp.key_size == b->sshfp.key_size && - memcmp(a->sshfp.key, b->sshfp.key, a->sshfp.key_size) == 0; - - case DNS_TYPE_DNSKEY: - return a->dnskey.zone_key_flag == b->dnskey.zone_key_flag && - a->dnskey.sep_flag == b->dnskey.sep_flag && - a->dnskey.algorithm == b->dnskey.algorithm && - a->dnskey.key_size == b->dnskey.key_size && - memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0; - - case DNS_TYPE_RRSIG: - /* do the fast comparisons first */ - if (a->rrsig.type_covered != b->rrsig.type_covered || - a->rrsig.algorithm != b->rrsig.algorithm || - a->rrsig.labels != b->rrsig.labels || - a->rrsig.original_ttl != b->rrsig.original_ttl || - a->rrsig.expiration != b->rrsig.expiration || - a->rrsig.inception != b->rrsig.inception || - a->rrsig.key_tag != b->rrsig.key_tag || - a->rrsig.signature_size != b->rrsig.signature_size || - memcmp(a->rrsig.signature, b->rrsig.signature, a->rrsig.signature_size) != 0) - return false; - - return dns_name_equal(a->rrsig.signer, b->rrsig.signer); - - default: - return a->generic.size == b->generic.size && - memcmp(a->generic.data, b->generic.data, a->generic.size) == 0; - } -} - -static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, - uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { - char *s; - char NS = latitude >= 1U<<31 ? 'N' : 'S'; - char EW = longitude >= 1U<<31 ? 'E' : 'W'; - - int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); - int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); - double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); - double siz = (size >> 4) * exp10((double) (size & 0xF)); - double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); - double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); - - if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", - (lat / 60000 / 60), - (lat / 60000) % 60, - (lat % 60000) / 1000., - NS, - (lon / 60000 / 60), - (lon / 60000) % 60, - (lon % 60000) / 1000., - EW, - alt / 100., - siz / 100., - hor / 100., - ver / 100.) < 0) - return NULL; - - return s; -} - -int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) { - _cleanup_free_ char *k = NULL, *t = NULL; - char *s; - int r; - - assert(rr); - - r = dns_resource_key_to_string(rr->key, &k); - if (r < 0) - return r; - - switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { - - case DNS_TYPE_SRV: - r = asprintf(&s, "%s %u %u %u %s", - k, - rr->srv.priority, - rr->srv.weight, - rr->srv.port, - strna(rr->srv.name)); - if (r < 0) - return -ENOMEM; - break; - - case DNS_TYPE_PTR: - case DNS_TYPE_NS: - case DNS_TYPE_CNAME: - case DNS_TYPE_DNAME: - s = strjoin(k, " ", rr->ptr.name, NULL); - if (!s) - return -ENOMEM; - - break; - - case DNS_TYPE_HINFO: - s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); - if (!s) - return -ENOMEM; - break; - - case DNS_TYPE_SPF: /* exactly the same as TXT */ - case DNS_TYPE_TXT: - t = strv_join_quoted(rr->txt.strings); - if (!t) - return -ENOMEM; - - s = strjoin(k, " ", t, NULL); - if (!s) - return -ENOMEM; - - break; - - case DNS_TYPE_A: { - _cleanup_free_ char *x = NULL; - - r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); - if (r < 0) - return r; - - s = strjoin(k, " ", x, NULL); - if (!s) - return -ENOMEM; - break; - } - - case DNS_TYPE_AAAA: - r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); - if (r < 0) - return r; - - s = strjoin(k, " ", t, NULL); - if (!s) - return -ENOMEM; - break; - - case DNS_TYPE_SOA: - r = asprintf(&s, "%s %s %s %u %u %u %u %u", - k, - strna(rr->soa.mname), - strna(rr->soa.rname), - rr->soa.serial, - rr->soa.refresh, - rr->soa.retry, - rr->soa.expire, - rr->soa.minimum); - if (r < 0) - return -ENOMEM; - break; - - case DNS_TYPE_MX: - r = asprintf(&s, "%s %u %s", - k, - rr->mx.priority, - rr->mx.exchange); - if (r < 0) - return -ENOMEM; - break; - - case DNS_TYPE_LOC: - assert(rr->loc.version == 0); - - t = format_location(rr->loc.latitude, - rr->loc.longitude, - rr->loc.altitude, - rr->loc.size, - rr->loc.horiz_pre, - rr->loc.vert_pre); - if (!t) - return -ENOMEM; - - s = strjoin(k, " ", t, NULL); - if (!s) - return -ENOMEM; - break; - - case DNS_TYPE_SSHFP: - t = hexmem(rr->sshfp.key, rr->sshfp.key_size); - if (!t) - return -ENOMEM; - - r = asprintf(&s, "%s %u %u %s", - k, - rr->sshfp.algorithm, - rr->sshfp.fptype, - t); - if (r < 0) - return -ENOMEM; - break; - - case DNS_TYPE_DNSKEY: { - const char *alg; - - alg = dnssec_algorithm_to_string(rr->dnskey.algorithm); - - t = hexmem(rr->dnskey.key, rr->dnskey.key_size); - if (!t) - return -ENOMEM; - - r = asprintf(&s, "%s %u 3 %.*s%.*u %s", - k, - dnskey_to_flags(rr), - alg ? -1 : 0, alg, - alg ? 0 : 1, alg ? 0u : (unsigned) rr->dnskey.algorithm, - t); - if (r < 0) - return -ENOMEM; - break; - } - - case DNS_TYPE_RRSIG: { - const char *type, *alg; - - type = dns_type_to_string(rr->rrsig.type_covered); - alg = dnssec_algorithm_to_string(rr->rrsig.algorithm); - - t = hexmem(rr->rrsig.signature, rr->rrsig.signature_size); - if (!t) - return -ENOMEM; - - /* TYPE?? follows - * http://tools.ietf.org/html/rfc3597#section-5 */ - - r = asprintf(&s, "%s %s%.*u %.*s%.*u %u %u %u %u %u %s %s", - k, - type ?: "TYPE", - type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, - alg ? -1 : 0, alg, - alg ? 0 : 1, alg ? 0u : (unsigned) rr->rrsig.algorithm, - rr->rrsig.labels, - rr->rrsig.original_ttl, - rr->rrsig.expiration, - rr->rrsig.inception, - rr->rrsig.key_tag, - rr->rrsig.signer, - t); - if (r < 0) - return -ENOMEM; - break; - } - - default: - t = hexmem(rr->generic.data, rr->generic.size); - if (!t) - return -ENOMEM; - - s = strjoin(k, " ", t, NULL); - if (!s) - return -ENOMEM; - break; - } - - *ret = s; - return 0; -} - -const char *dns_class_to_string(uint16_t class) { - - switch (class) { - - case DNS_CLASS_IN: - return "IN"; - - case DNS_CLASS_ANY: - return "ANY"; - } - - return NULL; -} - -int dns_class_from_string(const char *s, uint16_t *class) { - assert(s); - assert(class); - - if (strcaseeq(s, "IN")) - *class = DNS_CLASS_IN; - else if (strcaseeq(s, "ANY")) - *class = DNS_TYPE_ANY; - else - return -EINVAL; - - return 0; -} |