diff options
| -rw-r--r-- | src/basic/escape.c | 28 | ||||
| -rw-r--r-- | src/basic/escape.h | 1 | ||||
| -rw-r--r-- | src/resolve/resolved-dns-packet.c | 27 | ||||
| -rw-r--r-- | src/resolve/resolved-dns-rr.c | 36 | ||||
| -rw-r--r-- | src/resolve/resolved-dns-rr.h | 8 |
5 files changed, 100 insertions, 0 deletions
diff --git a/src/basic/escape.c b/src/basic/escape.c index f276c36c56..d59aa9f42f 100644 --- a/src/basic/escape.c +++ b/src/basic/escape.c @@ -415,6 +415,34 @@ char *xescape(const char *s, const char *bad) { return r; } +char *octescape(const char *s, size_t len) { + char *r, *t; + const char *f; + + /* Escapes all chars in bad, in addition to \ and " chars, + * in \nnn style escaping. */ + + r = new(char, len * 4 + 1); + if (!r) + return NULL; + + for (f = s, t = r; f < s + len; f++) { + + if (*f < ' ' || *f >= 127 || *f == '\\' || *f == '"') { + *(t++) = '\\'; + *(t++) = '0' + (*f >> 6); + *(t++) = '0' + ((*f >> 3) & 8); + *(t++) = '0' + (*f & 8); + } else + *(t++) = *f; + } + + *t = 0; + + return r; + +} + static char *strcpy_backslash_escaped(char *t, const char *s, const char *bad) { assert(bad); diff --git a/src/basic/escape.h b/src/basic/escape.h index ac8f5f3910..bc25646a3d 100644 --- a/src/basic/escape.h +++ b/src/basic/escape.h @@ -50,6 +50,7 @@ int cunescape_length_with_prefix(const char *s, size_t length, const char *prefi int cunescape_one(const char *p, size_t length, char32_t *ret, bool *eight_bit); char *xescape(const char *s, const char *bad); +char *octescape(const char *s, size_t len); char *shell_escape(const char *s, const char *bad); char *shell_maybe_quote(const char *s); diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c index 6a9a1f732d..4c4d16d109 100644 --- a/src/resolve/resolved-dns-packet.c +++ b/src/resolve/resolved-dns-packet.c @@ -1086,6 +1086,18 @@ int dns_packet_append_rr(DnsPacket *p, const DnsResourceRecord *rr, size_t *star r = dns_packet_append_blob(p, rr->tlsa.data, rr->tlsa.data_size, NULL); break; + case DNS_TYPE_CAA: + r = dns_packet_append_uint8(p, rr->caa.flags, NULL); + if (r < 0) + goto fail; + + r = dns_packet_append_string(p, rr->caa.tag, NULL); + if (r < 0) + goto fail; + + r = dns_packet_append_blob(p, rr->caa.value, rr->caa.value_size, NULL); + break; + case DNS_TYPE_OPT: case DNS_TYPE_OPENPGPKEY: case _DNS_TYPE_INVALID: /* unparseable */ @@ -1967,6 +1979,21 @@ int dns_packet_read_rr(DnsPacket *p, DnsResourceRecord **ret, bool *ret_cache_fl break; + case DNS_TYPE_CAA: + r = dns_packet_read_uint8(p, &rr->caa.flags, NULL); + if (r < 0) + return r; + + r = dns_packet_read_string(p, &rr->caa.tag, NULL); + if (r < 0) + return r; + + r = dns_packet_read_memdup(p, + rdlength + offset - p->rindex, + &rr->caa.value, &rr->caa.value_size, NULL); + + break; + case DNS_TYPE_OPT: /* we only care about the header of OPT for now. */ case DNS_TYPE_OPENPGPKEY: default: diff --git a/src/resolve/resolved-dns-rr.c b/src/resolve/resolved-dns-rr.c index 422bbe4bc4..35c0de1a6d 100644 --- a/src/resolve/resolved-dns-rr.c +++ b/src/resolve/resolved-dns-rr.c @@ -24,6 +24,7 @@ #include "alloc-util.h" #include "dns-domain.h" #include "dns-type.h" +#include "escape.h" #include "hexdecoct.h" #include "resolved-dns-dnssec.h" #include "resolved-dns-packet.h" @@ -492,6 +493,11 @@ DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { free(rr->tlsa.data); break; + case DNS_TYPE_CAA: + free(rr->caa.tag); + free(rr->caa.value); + break; + case DNS_TYPE_OPENPGPKEY: default: free(rr->generic.data); @@ -699,6 +705,12 @@ int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecor a->tlsa.matching_type == b->tlsa.matching_type && FIELD_EQUAL(a->tlsa, b->tlsa, data); + case DNS_TYPE_CAA: + return a->caa.flags == b->caa.flags && + streq(a->caa.tag, b->caa.tag) && + FIELD_EQUAL(a->caa, b->caa, value); + + case DNS_TYPE_OPENPGPKEY: default: return FIELD_EQUAL(a->generic, b->generic, data); } @@ -1142,6 +1154,24 @@ const char *dns_resource_record_to_string(DnsResourceRecord *rr) { break; } + case DNS_TYPE_CAA: { + _cleanup_free_ char *value; + + value = octescape(rr->caa.value, rr->caa.value_size); + if (!value) + return NULL; + + r = asprintf(&s, "%s %u %s \"%s\"", + k, + rr->caa.flags, + rr->caa.tag, + value); + if (r < 0) + return NULL; + + break; + } + case DNS_TYPE_OPENPGPKEY: { int n; @@ -1432,6 +1462,12 @@ void dns_resource_record_hash_func(const void *i, struct siphash *state) { siphash24_compress(rr->tlsa.data, rr->tlsa.data_size, state); break; + case DNS_TYPE_CAA: + siphash24_compress(&rr->caa.flags, sizeof(rr->caa.flags), state); + string_hash_func(rr->caa.tag, state); + siphash24_compress(rr->caa.value, rr->caa.value_size, state); + break; + case DNS_TYPE_OPENPGPKEY: default: siphash24_compress(rr->generic.data, rr->generic.data_size, state); diff --git a/src/resolve/resolved-dns-rr.h b/src/resolve/resolved-dns-rr.h index 01c7091645..b75676912b 100644 --- a/src/resolve/resolved-dns-rr.h +++ b/src/resolve/resolved-dns-rr.h @@ -251,6 +251,14 @@ struct DnsResourceRecord { void *data; size_t data_size; } tlsa; + + /* https://tools.ietf.org/html/rfc6844 */ + struct { + uint8_t flags; + char *tag; + void *value; + size_t value_size; + } caa; }; }; |