X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=server.c;h=2b354bdf63d8421782b26e1a9125a54df07a3637;hb=c8dd2dc8f91a322178c43281cbc5c8fc16da5219;hp=baac24cd1dcd1910241bafc5f0398440d72c90d7;hpb=7bb43bd370e70385a4ccde06f3f4554f488aa6b3;p=catta

diff --git a/server.c b/server.c
index baac24c..2b354bd 100644
--- a/server.c
+++ b/server.c
@@ -9,15 +9,95 @@
 #include "iface.h"
 #include "socket.h"
 
+static void handle_query_key(flxServer *s, flxKey *k, flxInterface *i, const flxAddress *a) {
+    flxEntry *e;
+    gchar *txt;
+    
+    g_assert(s);
+    g_assert(k);
+    g_assert(i);
+    g_assert(a);
+
+    g_message("Handling query: %s", txt = flx_key_to_string(k));
+    g_free(txt);
+
+    for (e = g_hash_table_lookup(s->rrset_by_name, k); e; e = e->by_name_next) {
+
+        if ((e->interface <= 0 || e->interface == i->index) &&
+            (e->protocol == AF_UNSPEC || e->protocol == a->family)) {
+
+            flx_interface_post_response(i, a->family, e->record);
+        }
+    }
+}
+
+static void handle_query(flxServer *s, flxDnsPacket *p, flxInterface *i, const flxAddress *a) {
+    guint n;
+    
+    g_assert(s);
+    g_assert(p);
+    g_assert(i);
+    g_assert(a);
+
+    for (n = flx_dns_packet_get_field(p, DNS_FIELD_QDCOUNT); n > 0; n --) {
+        flxKey *key;
+
+        if (!(key = flx_dns_packet_consume_key(p))) {
+            g_warning("Packet too short");
+            return;
+        }
+
+        handle_query_key(s, key, i, a);
+        flx_key_unref(key);
+    }
+}
+
+static void handle_response(flxServer *s, flxDnsPacket *p, flxInterface *i, const flxAddress *a) {
+    guint n;
+    
+    g_assert(s);
+    g_assert(p);
+    g_assert(i);
+    g_assert(a);
+    
+    for (n = flx_dns_packet_get_field(p, DNS_FIELD_ANCOUNT) +
+             flx_dns_packet_get_field(p, DNS_FIELD_ARCOUNT); n > 0; n--) {
+        flxRecord *record;
+        gboolean cache_flush = FALSE;
+        gchar *txt;
+        
+        if (!(record = flx_dns_packet_consume_record(p, &cache_flush))) {
+            g_warning("Packet too short");
+            return;
+        }
+
+        g_message("Handling response: %s", txt = flx_record_to_string(record));
+        g_free(txt);
+
+        flx_cache_update(a->family == AF_INET ? i->ipv4_cache : i->ipv6_cache, record, cache_flush, a);
+        flx_packet_scheduler_drop_response(a->family == AF_INET ? i->ipv4_scheduler : i->ipv6_scheduler, record);
+        flx_record_unref(record);
+    }
+}
+
 static void dispatch_packet(flxServer *s, flxDnsPacket *p, struct sockaddr *sa, gint iface, gint ttl) {
+    flxInterface *i;
+    flxAddress a;
+    
     g_assert(s);
     g_assert(p);
     g_assert(sa);
     g_assert(iface > 0);
-    
+
+    g_message("new packet recieved.");
+
+    if (!(i = flx_interface_monitor_get_interface(s->monitor, iface))) {
+        g_warning("Recieved packet from invalid interface.");
+        return;
+    }
+
     if (ttl != 255) {
-        flxInterface *i = flx_interface_monitor_get_interface(s->monitor, iface);
-        g_warning("Recieved packet with invalid TTL on interface '%s'.", i ? i->name : "unknown");
+        g_warning("Recieved packet with invalid TTL on interface '%s'.", i->name);
         return;
     }
 
@@ -34,8 +114,35 @@ static void dispatch_packet(flxServer *s, flxDnsPacket *p, struct sockaddr *sa,
         }
     }
 
-    g_message("Recieved packet");
+    if (flx_dns_packet_check_valid(p) < 0) {
+        g_warning("Recieved invalid packet.");
+        return;
+    }
+
+    flx_address_from_sockaddr(sa, &a);
+
+    if (flx_dns_packet_is_query(p)) {
+
+        if (flx_dns_packet_get_field(p, DNS_FIELD_QDCOUNT) == 0 ||
+            flx_dns_packet_get_field(p, DNS_FIELD_ARCOUNT) != 0 ||
+            flx_dns_packet_get_field(p, DNS_FIELD_NSCOUNT) != 0) {
+            g_warning("Invalid query packet.");
+            return;
+        }
+                
+        handle_query(s, p, i, &a);    
+        g_message("Handled query");
+    } else {
+        if (flx_dns_packet_get_field(p, DNS_FIELD_QDCOUNT) != 0 ||
+            flx_dns_packet_get_field(p, DNS_FIELD_ANCOUNT) == 0 ||
+            flx_dns_packet_get_field(p, DNS_FIELD_NSCOUNT) != 0) {
+            g_warning("Invalid response packet.");
+            return;
+        }
 
+        handle_response(s, p, i, &a);
+        g_message("Handled response");
+    }
 }
 
 static gboolean work(flxServer *s) {
@@ -334,6 +441,8 @@ void flx_server_dump(flxServer *s, FILE *f) {
     g_assert(s);
     g_assert(f);
 
+    fprintf(f, ";;; ZONE DUMP FOLLOWS ;;;\n");
+
     for (e = s->entries; e; e = e->entry_next) {
         gchar *t;
 
@@ -341,6 +450,8 @@ void flx_server_dump(flxServer *s, FILE *f) {
         fprintf(f, "%s\n", t);
         g_free(t);
     }
+
+    flx_dump_caches(s, f);
 }
 
 void flx_server_add_address(
@@ -361,9 +472,9 @@ void flx_server_add_address(
     if (a->family == AF_INET) {
         gchar *r;
         
-        flx_server_add_full(s, id, interface, protocol, unique, n, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_A, &a->ipv4, sizeof(a->ipv4), FLX_DEFAULT_TTL);
+        flx_server_add_full(s, id, interface, protocol, unique, n, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_A, &a->data.ipv4, sizeof(a->data.ipv4), FLX_DEFAULT_TTL);
 
-        r = flx_reverse_lookup_name_ipv4(&a->ipv4);
+        r = flx_reverse_lookup_name_ipv4(&a->data.ipv4);
         g_assert(r);
         flx_server_add_full(s, id, interface, protocol, unique, r, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_PTR, n, strlen(n)+1, FLX_DEFAULT_TTL);
         g_free(r);
@@ -371,14 +482,14 @@ void flx_server_add_address(
     } else {
         gchar *r;
             
-        flx_server_add_full(s, id, interface, protocol, unique, n, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_AAAA, &a->ipv6, sizeof(a->ipv6), FLX_DEFAULT_TTL);
+        flx_server_add_full(s, id, interface, protocol, unique, n, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_AAAA, &a->data.ipv6, sizeof(a->data.ipv6), FLX_DEFAULT_TTL);
 
-        r = flx_reverse_lookup_name_ipv6_arpa(&a->ipv6);
+        r = flx_reverse_lookup_name_ipv6_arpa(&a->data.ipv6);
         g_assert(r);
         flx_server_add_full(s, id, interface, protocol, unique, r, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_PTR, n, strlen(n)+1, FLX_DEFAULT_TTL);
         g_free(r);
     
-        r = flx_reverse_lookup_name_ipv6_int(&a->ipv6);
+        r = flx_reverse_lookup_name_ipv6_int(&a->data.ipv6);
         g_assert(r);
         flx_server_add_full(s, id, interface, protocol, unique, r, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_PTR, n, strlen(n)+1, FLX_DEFAULT_TTL);
         g_free(r);
@@ -402,7 +513,7 @@ void flx_server_add_text(
     flx_server_add_full(s, id, interface, protocol, unique, name, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_TXT, text, strlen(text), FLX_DEFAULT_TTL);
 }
 
-void flx_server_send_query(flxServer *s, gint interface, guchar protocol, flxKey *k) {
+void flx_server_post_query(flxServer *s, gint interface, guchar protocol, flxKey *k) {
     g_assert(s);
     g_assert(k);
 
@@ -410,7 +521,7 @@ void flx_server_send_query(flxServer *s, gint interface, guchar protocol, flxKey
         flxInterface *i;
 
         for (i = flx_interface_monitor_get_first(s->monitor); i; i = i->interface_next)
-            flx_interface_send_query(i, protocol, k);
+            flx_interface_post_query(i, protocol, k);
         
     } else {
         flxInterface *i;
@@ -418,6 +529,6 @@ void flx_server_send_query(flxServer *s, gint interface, guchar protocol, flxKey
         if (!(i = flx_interface_monitor_get_interface(s->monitor, interface)))
             return;
 
-        flx_interface_send_query(i, protocol, k);
+        flx_interface_post_query(i, protocol, k);
     }
 }