resolve: set error code on failure

[elogind.git] / src / resolve / resolved-dns-packet.h

diff --git a/src/resolve/resolved-dns-packet.h b/src/resolve/resolved-dns-packet.h
index b8370def32a1d0273022666455bf1d5e3b31fc13..561dd3adfa72fd57187216126a2c9d605ac6ea88 100644 (file)
--- a/src/resolve/resolved-dns-packet.h
+++ b/src/resolve/resolved-dns-packet.h
@@ -34,6 +34,7 @@ typedef struct DnsPacket DnsPacket;
 #include "resolved-dns-rr.h"
 #include "resolved-dns-question.h"
 #include "resolved-dns-answer.h"
+#include "resolved-def.h"
 
 typedef enum DnsProtocol {
         DNS_PROTOCOL_DNS,
@@ -77,9 +78,12 @@ struct DnsPacket {
 
         /* Packet reception meta data */
         int ifindex;
-        int family;
+        int family, ipproto;
         union in_addr_union sender, destination;
+        uint16_t sender_port, destination_port;
         uint32_t ttl;
+
+        bool extracted;
 };
 
 static inline uint8_t* DNS_PACKET_DATA(DnsPacket *p) {
@@ -98,6 +102,8 @@ static inline uint8_t* DNS_PACKET_DATA(DnsPacket *p) {
 #define DNS_PACKET_OPCODE(p) ((be16toh(DNS_PACKET_HEADER(p)->flags) >> 11) & 15)
 #define DNS_PACKET_RCODE(p) (be16toh(DNS_PACKET_HEADER(p)->flags) & 15)
 #define DNS_PACKET_TC(p) ((be16toh(DNS_PACKET_HEADER(p)->flags) >> 9) & 1)
+#define DNS_PACKET_C(p) ((be16toh(DNS_PACKET_HEADER(p)->flags) >> 10) & 1)
+#define DNS_PACKET_T(p) ((be16toh(DNS_PACKET_HEADER(p)->flags) >> 8) & 1)
 #define DNS_PACKET_QDCOUNT(p) be16toh(DNS_PACKET_HEADER(p)->qdcount)
 #define DNS_PACKET_ANCOUNT(p) be16toh(DNS_PACKET_HEADER(p)->ancount)
 #define DNS_PACKET_NSCOUNT(p) be16toh(DNS_PACKET_HEADER(p)->nscount)
@@ -131,20 +137,27 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(DnsPacket*, dns_packet_unref);
 
 int dns_packet_validate(DnsPacket *p);
 int dns_packet_validate_reply(DnsPacket *p);
+int dns_packet_validate_query(DnsPacket *p);
 
+int dns_packet_append_blob(DnsPacket *p, const void *d, size_t sz, size_t *start);
 int dns_packet_append_uint8(DnsPacket *p, uint8_t v, size_t *start);
 int dns_packet_append_uint16(DnsPacket *p, uint16_t v, size_t *start);
+int dns_packet_append_uint32(DnsPacket *p, uint32_t v, size_t *start);
 int dns_packet_append_string(DnsPacket *p, const char *s, size_t *start);
 int dns_packet_append_label(DnsPacket *p, const char *s, size_t l, size_t *start);
-int dns_packet_append_name(DnsPacket *p, const char *name, size_t *start);
-int dns_packet_append_key(DnsPacket *p, const DnsResourceKey *k, size_t *start);
+int dns_packet_append_name(DnsPacket *p, const char *name,
+                           bool allow_compression, size_t *start);
+int dns_packet_append_key(DnsPacket *p, const DnsResourceKey *key, size_t *start);
+int dns_packet_append_rr(DnsPacket *p, const DnsResourceRecord *rr, size_t *start);
 
 int dns_packet_read(DnsPacket *p, size_t sz, const void **ret, size_t *start);
+int dns_packet_read_blob(DnsPacket *p, void *d, size_t sz, size_t *start);
 int dns_packet_read_uint8(DnsPacket *p, uint8_t *ret, size_t *start);
 int dns_packet_read_uint16(DnsPacket *p, uint16_t *ret, size_t *start);
 int dns_packet_read_uint32(DnsPacket *p, uint32_t *ret, size_t *start);
 int dns_packet_read_string(DnsPacket *p, char **ret, size_t *start);
-int dns_packet_read_name(DnsPacket *p, char **ret, size_t *start);
+int dns_packet_read_name(DnsPacket *p, char **ret,
+                         bool allow_compression, size_t *start);
 int dns_packet_read_key(DnsPacket *p, DnsResourceKey **ret, size_t *start);
 int dns_packet_read_rr(DnsPacket *p, DnsResourceRecord **ret, size_t *start);
 
@@ -184,3 +197,40 @@ DnsProtocol dns_protocol_from_string(const char *s) _pure_;
 
 #define LLMNR_MULTICAST_IPV4_ADDRESS ((struct in_addr) { .s_addr = htobe32(224U << 24 | 252U) })
 #define LLMNR_MULTICAST_IPV6_ADDRESS ((struct in6_addr) { .s6_addr = { 0xFF, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x03 } })
+
+#define DNSKEY_FLAG_ZONE_KEY (1u << 8)
+#define DNSKEY_FLAG_SEP      (1u << 0)
+
+static inline uint16_t dnskey_to_flags(const DnsResourceRecord *rr) {
+        return (rr->dnskey.zone_key_flag * DNSKEY_FLAG_ZONE_KEY |
+                rr->dnskey.sep_flag * DNSKEY_FLAG_SEP);
+}
+
+/* http://tools.ietf.org/html/rfc4034#appendix-A.1 */
+enum {
+        DNSSEC_ALGORITHM_RSAMD5 = 1,
+        DNSSEC_ALGORITHM_DH,
+        DNSSEC_ALGORITHM_DSA,
+        DNSSEC_ALGORITHM_ECC,
+        DNSSEC_ALGORITHM_RSASHA1,
+        DNSSEC_ALGORITHM_INDIRECT = 252,
+        DNSSEC_ALGORITHM_PRIVATEDNS,
+        DNSSEC_ALGORITHM_PRIVATEOID,
+        _DNSSEC_ALGORITHM_MAX_DEFINED
+};
+
+const char* dnssec_algorithm_to_string(int i) _const_;
+int dnssec_algorithm_from_string(const char *s) _pure_;
+
+static inline uint64_t SD_RESOLVED_FLAGS_MAKE(DnsProtocol protocol, int family) {
+
+        /* Converts a protocol + family into a flags field as used in queries */
+
+        if (protocol == DNS_PROTOCOL_DNS)
+                return SD_RESOLVED_DNS;
+
+        if (protocol == DNS_PROTOCOL_LLMNR)
+                return family == AF_INET6 ? SD_RESOLVED_LLMNR_IPV6 : SD_RESOLVED_LLMNR_IPV4;
+
+        return 0;
+}