change type for address family to "int"

[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 99f60a15569526c2c9024279170c2e516e2b1647..4fd2d408ce84c41e968866e12273906675262140 100644 (file)
--- a/src/resolve/resolved-dns-packet.h
+++ b/src/resolve/resolved-dns-packet.h
@@ -31,6 +31,14 @@ typedef struct DnsPacket DnsPacket;
 #include "hashmap.h"
 #include "resolved-dns-rr.h"
 
+typedef enum DnsProtocol {
+        DNS_PROTOCOL_DNS,
+        DNS_PROTOCOL_MDNS,
+        DNS_PROTOCOL_LLMNR,
+        _DNS_PROTOCOL_MAX,
+        _DNS_PROTOCOL_INVALID = -1
+} DnsProtocol;
+
 struct DnsPacketHeader {
         uint16_t id;
         be16_t flags;
@@ -44,16 +52,27 @@ struct DnsPacketHeader {
 
 /* The various DNS protocols deviate in how large a packet can grow,
    but the TCP transport has a 16bit size field, hence that appears to
-   be the maximum. */
+   be the absolute maximum. */
 #define DNS_PACKET_SIZE_MAX 0xFFFF
+
+/* RFC 1035 say 512 is the maximum, for classic unicast DNS */
+#define DNS_PACKET_UNICAST_SIZE_MAX 512
+
 #define DNS_PACKET_SIZE_START 512
 
 struct DnsPacket {
         int n_ref;
-        int ifindex;
+        DnsProtocol protocol;
         size_t size, allocated, rindex;
-        Hashmap *names; /* For name compression */
         void *data;
+        Hashmap *names; /* For name compression */
+        DnsResourceRecord **rrs;
+
+        /* Packet reception meta data */
+        int ifindex;
+        int family;
+        union in_addr_union sender, destination;
+        uint32_t ttl;
 };
 
 static inline uint8_t* DNS_PACKET_DATA(DnsPacket *p) {
@@ -88,9 +107,15 @@ static inline uint8_t* DNS_PACKET_DATA(DnsPacket *p) {
          ((uint16_t) !!cd << 4) | \
          ((uint16_t) (rcode & 15)))
 
+static inline unsigned DNS_PACKET_RRCOUNT(DnsPacket *p) {
+        return
+                (unsigned) DNS_PACKET_ANCOUNT(p) +
+                (unsigned) DNS_PACKET_NSCOUNT(p) +
+                (unsigned) DNS_PACKET_ARCOUNT(p);
+}
 
-int dns_packet_new(DnsPacket **p, size_t mtu);
-int dns_packet_new_query(DnsPacket **p, size_t mtu);
+int dns_packet_new(DnsPacket **p, DnsProtocol protocol, size_t mtu);
+int dns_packet_new_query(DnsPacket **p, DnsProtocol protocol, size_t mtu);
 
 DnsPacket *dns_packet_ref(DnsPacket *p);
 DnsPacket *dns_packet_unref(DnsPacket *p);
@@ -119,6 +144,7 @@ int dns_packet_read_rr(DnsPacket *p, DnsResourceRecord **ret, size_t *start);
 void dns_packet_rewind(DnsPacket *p, size_t idx);
 
 int dns_packet_skip_question(DnsPacket *p);
+int dns_packet_extract_rrs(DnsPacket *p);
 
 enum {
         DNS_RCODE_SUCCESS = 0,
@@ -145,3 +171,9 @@ enum {
 
 const char* dns_rcode_to_string(int i) _const_;
 int dns_rcode_from_string(const char *s) _pure_;
+
+const char* dns_protocol_to_string(DnsProtocol p) _const_;
+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 } })