#include "util.h"
#include "iface.h"
#include "socket.h"
+#include "subscribe.h"
+
+static void handle_query_key(flxServer *s, flxKey *k, flxInterface *i, const flxAddress *a) {
+ flxServerEntry *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);
+
+ flx_packet_scheduler_incoming_query(i->scheduler, k);
+
+ if (k->type == FLX_DNS_TYPE_ANY) {
+
+ /* Handle ANY query */
+
+ for (e = s->entries; e; e = e->entry_next)
+ if (flx_key_pattern_match(k, e->record->key))
+ if (flx_interface_match(i, e->interface, e->protocol))
+ flx_interface_post_response(i, e->record, FALSE);
+ } else {
+
+ /* Handle all other queries */
+
+ for (e = g_hash_table_lookup(s->rrset_by_key, k); e; e = e->by_key_next)
+ if (flx_interface_match(i, e->interface, e->protocol))
+ flx_interface_post_response(i, e->record, FALSE);
+ }
+}
+
+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;
+ }
+
+ if (record->key->type != FLX_DNS_TYPE_ANY) {
+ g_message("Handling response: %s", txt = flx_record_to_string(record));
+ g_free(txt);
+
+ flx_cache_update(i->cache, record, cache_flush, a);
+
+ flx_packet_scheduler_incoming_response(i->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, sa->sa_family))) {
+ g_warning("Recieved packet from invalid interface.");
+ return;
+ }
+
+ if (ttl != 255) {
+ g_warning("Recieved packet with invalid TTL on interface '%s.%i'.", i->hardware->name, i->protocol);
+ return;
+ }
+
+ if (sa->sa_family == AF_INET6) {
+ static const unsigned char ipv4_in_ipv6[] = {
+ 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00,
+ 0xFF, 0xFF, 0xFF, 0xFF };
+
+ if (memcmp(((struct sockaddr_in6*) sa)->sin6_addr.s6_addr, ipv4_in_ipv6, sizeof(ipv4_in_ipv6)) == 0) {
+
+ /* This is an IPv4 address encapsulated in IPv6, so let's ignore it. */
+ return;
+ }
+ }
+
+ 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) {
+ struct sockaddr_in6 sa6;
+ struct sockaddr_in sa;
+ flxDnsPacket *p;
+ gint iface = -1;
+ guint8 ttl;
+
+ g_assert(s);
+
+ if (s->pollfd_ipv4.revents & G_IO_IN) {
+ if ((p = flx_recv_dns_packet_ipv4(s->fd_ipv4, &sa, &iface, &ttl))) {
+ dispatch_packet(s, p, (struct sockaddr*) &sa, iface, ttl);
+ flx_dns_packet_free(p);
+ }
+ }
+
+ if (s->pollfd_ipv6.revents & G_IO_IN) {
+ if ((p = flx_recv_dns_packet_ipv6(s->fd_ipv6, &sa6, &iface, &ttl))) {
+ dispatch_packet(s, p, (struct sockaddr*) &sa6, iface, ttl);
+ flx_dns_packet_free(p);
+ }
+ }
+
+ return TRUE;
+}
+
+static gboolean prepare_func(GSource *source, gint *timeout) {
+ g_assert(source);
+ g_assert(timeout);
+
+ *timeout = -1;
+ return FALSE;
+}
+
+static gboolean check_func(GSource *source) {
+ flxServer* s;
+ g_assert(source);
+
+ s = *((flxServer**) (((guint8*) source) + sizeof(GSource)));
+ g_assert(s);
+
+ return (s->pollfd_ipv4.revents | s->pollfd_ipv6.revents) & (G_IO_IN | G_IO_HUP | G_IO_ERR);
+}
+
+static gboolean dispatch_func(GSource *source, GSourceFunc callback, gpointer user_data) {
+ flxServer* s;
+ g_assert(source);
+
+ s = *((flxServer**) (((guint8*) source) + sizeof(GSource)));
+ g_assert(s);
+
+ return work(s);
+}
static void add_default_entries(flxServer *s) {
gint length = 0;
/* Fill in HINFO rr */
uname(&utsname);
- hinfo = g_strdup_printf("%s%c%s%n", g_strup(utsname.machine), 0, g_strup(utsname.sysname), &length);
+ hinfo = g_strdup_printf("%c%s%c%s%n",
+ strlen(utsname.machine), g_strup(utsname.machine),
+ strlen(utsname.sysname), g_strup(utsname.sysname),
+ &length);
flx_server_add_full(s, 0, 0, AF_UNSPEC, TRUE,
- s->hostname, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_HINFO, hinfo, length+1, FLX_DEFAULT_TTL);
+ s->hostname, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_HINFO, hinfo, length, FLX_DEFAULT_TTL);
g_free(hinfo);
flxServer *flx_server_new(GMainContext *c) {
gchar *hn, *e;
flxServer *s;
+
+ static GSourceFuncs source_funcs = {
+ prepare_func,
+ check_func,
+ dispatch_func,
+ NULL,
+ NULL,
+ NULL
+ };
s = g_new(flxServer, 1);
s->context = g_main_context_default();
s->current_id = 1;
+
+ FLX_LLIST_HEAD_INIT(flxServerEntry, s->entries);
s->rrset_by_id = g_hash_table_new(g_int_hash, g_int_equal);
- s->rrset_by_name = g_hash_table_new((GHashFunc) flx_key_hash, (GEqualFunc) flx_key_equal);
+ s->rrset_by_key = g_hash_table_new((GHashFunc) flx_key_hash, (GEqualFunc) flx_key_equal);
- FLX_LLIST_HEAD_INIT(flxEntry, s->entries);
+ FLX_LLIST_HEAD_INIT(flxSubscription, s->subscriptions);
+ s->subscription_hashtable = g_hash_table_new((GHashFunc) flx_key_hash, (GEqualFunc) flx_key_equal);
s->monitor = flx_interface_monitor_new(s);
s->time_event_queue = flx_time_event_queue_new(s->context);
add_default_entries(s);
+ s->source = g_source_new(&source_funcs, sizeof(GSource) + sizeof(flxServer*));
+ *((flxServer**) (((guint8*) s->source) + sizeof(GSource))) = s;
+
+ memset(&s->pollfd_ipv4, 0, sizeof(s->pollfd_ipv4));
+ s->pollfd_ipv4.fd = s->fd_ipv4;
+ s->pollfd_ipv4.events = G_IO_IN|G_IO_ERR|G_IO_HUP;
+ g_source_add_poll(s->source, &s->pollfd_ipv4);
+
+ memset(&s->pollfd_ipv6, 0, sizeof(s->pollfd_ipv6));
+ s->pollfd_ipv6.fd = s->fd_ipv6;
+ s->pollfd_ipv6.events = G_IO_IN|G_IO_ERR|G_IO_HUP;
+ g_source_add_poll(s->source, &s->pollfd_ipv6);
+
+ g_source_attach(s->source, s->context);
+
return s;
}
flx_interface_monitor_free(s->monitor);
flx_server_remove(s, 0);
+
+ while (s->subscriptions)
+ flx_subscription_free(s->subscriptions);
+ g_hash_table_destroy(s->subscription_hashtable);
g_hash_table_destroy(s->rrset_by_id);
- g_hash_table_destroy(s->rrset_by_name);
+ g_hash_table_destroy(s->rrset_by_key);
flx_time_event_queue_free(s->time_event_queue);
- g_main_context_unref(s->context);
if (s->fd_ipv4 >= 0)
close(s->fd_ipv4);
close(s->fd_ipv6);
g_free(s->hostname);
+
+ g_source_destroy(s->source);
+ g_source_unref(s->source);
+ g_main_context_unref(s->context);
+
g_free(s);
}
gboolean unique,
flxRecord *r) {
- flxEntry *e, *t;
+ flxServerEntry *e, *t;
g_assert(s);
g_assert(r);
- e = g_new(flxEntry, 1);
+ g_assert(r->key->type != FLX_DNS_TYPE_ANY);
+
+ e = g_new(flxServerEntry, 1);
e->record = flx_record_ref(r);
e->id = id;
e->interface = interface;
e->protocol = protocol;
e->unique = unique;
- FLX_LLIST_PREPEND(flxEntry, entry, s->entries, e);
+ FLX_LLIST_HEAD_INIT(flxAnnouncement, e->announcements);
+
+ FLX_LLIST_PREPEND(flxServerEntry, entry, s->entries, e);
/* Insert into hash table indexed by id */
t = g_hash_table_lookup(s->rrset_by_id, &e->id);
- FLX_LLIST_PREPEND(flxEntry, by_id, t, e);
+ FLX_LLIST_PREPEND(flxServerEntry, by_id, t, e);
g_hash_table_replace(s->rrset_by_id, &e->id, t);
/* Insert into hash table indexed by name */
- t = g_hash_table_lookup(s->rrset_by_name, e->record->key);
- FLX_LLIST_PREPEND(flxEntry, by_name, t, e);
- g_hash_table_replace(s->rrset_by_name, e->record->key, t);
+ t = g_hash_table_lookup(s->rrset_by_key, e->record->key);
+ FLX_LLIST_PREPEND(flxServerEntry, by_key, t, e);
+ g_hash_table_replace(s->rrset_by_key, e->record->key, t);
+
+ flx_announce_entry(s, e);
}
void flx_server_add_full(
}
const flxRecord *flx_server_iterate(flxServer *s, gint id, void **state) {
- flxEntry **e = (flxEntry**) state;
+ flxServerEntry **e = (flxServerEntry**) state;
g_assert(s);
g_assert(e);
return flx_record_ref((*e)->record);
}
-static void free_entry(flxServer*s, flxEntry *e) {
- flxEntry *t;
+static void free_entry(flxServer*s, flxServerEntry *e) {
+ flxServerEntry *t;
g_assert(e);
+ flx_goodbye_entry(s, e, TRUE);
+
/* Remove from linked list */
- FLX_LLIST_REMOVE(flxEntry, entry, s->entries, e);
+ FLX_LLIST_REMOVE(flxServerEntry, entry, s->entries, e);
/* Remove from hash table indexed by id */
t = g_hash_table_lookup(s->rrset_by_id, &e->id);
- FLX_LLIST_REMOVE(flxEntry, by_id, t, e);
+ FLX_LLIST_REMOVE(flxServerEntry, by_id, t, e);
if (t)
g_hash_table_replace(s->rrset_by_id, &t->id, t);
else
g_hash_table_remove(s->rrset_by_id, &e->id);
/* Remove from hash table indexed by name */
- t = g_hash_table_lookup(s->rrset_by_name, e->record->key);
- FLX_LLIST_REMOVE(flxEntry, by_name, t, e);
+ t = g_hash_table_lookup(s->rrset_by_key, e->record->key);
+ FLX_LLIST_REMOVE(flxServerEntry, by_key, t, e);
if (t)
- g_hash_table_replace(s->rrset_by_name, t->record->key, t);
+ g_hash_table_replace(s->rrset_by_key, t->record->key, t);
else
- g_hash_table_remove(s->rrset_by_name, e->record->key);
+ g_hash_table_remove(s->rrset_by_key, e->record->key);
flx_record_unref(e->record);
g_free(e);
while (s->entries)
free_entry(s, s->entries);
} else {
- flxEntry *e;
+ flxServerEntry *e;
while ((e = g_hash_table_lookup(s->rrset_by_id, &id)))
free_entry(s, e);
}
void flx_server_dump(flxServer *s, FILE *f) {
- flxEntry *e;
+ flxServerEntry *e;
g_assert(s);
g_assert(f);
+ fprintf(f, "\n;;; ZONE DUMP FOLLOWS ;;;\n");
+
for (e = s->entries; e; e = e->entry_next) {
gchar *t;
fprintf(f, "%s\n", t);
g_free(t);
}
+
+ flx_dump_caches(s->monitor, f);
}
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);
} 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);
const gchar *name,
const gchar *text) {
+ gchar buf[256];
+ guint l;
+
g_assert(s);
g_assert(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);
+ if ((l = strlen(text)) > 255)
+ buf[0] = 255;
+ else
+ buf[0] = (gchar) l;
+
+ memcpy(buf+1, text, l);
+
+ flx_server_add_full(s, id, interface, protocol, unique, name, FLX_DNS_CLASS_IN, FLX_DNS_TYPE_TXT, buf, l+1, FLX_DEFAULT_TTL);
}
-void flx_server_send_query(flxServer *s, gint interface, guchar protocol, flxKey *k) {
- g_assert(s);
+static void post_query_callback(flxInterfaceMonitor *m, flxInterface *i, gpointer userdata) {
+ flxKey *k = userdata;
+
+ g_assert(m);
+ g_assert(i);
g_assert(k);
- if (interface <= 0) {
- flxInterface *i;
+ flx_interface_post_query(i, k, FALSE);
+}
- for (i = flx_interface_monitor_get_first(s->monitor); i; i = i->interface_next)
- flx_interface_send_query(i, protocol, k);
-
- } else {
- flxInterface *i;
+void flx_server_post_query(flxServer *s, gint interface, guchar protocol, flxKey *key) {
+ g_assert(s);
+ g_assert(key);
- if (!(i = flx_interface_monitor_get_interface(s->monitor, interface)))
- return;
+ flx_interface_monitor_walk(s->monitor, interface, protocol, post_query_callback, key);
+}
- flx_interface_send_query(i, protocol, k);
- }
+static void post_response_callback(flxInterfaceMonitor *m, flxInterface *i, gpointer userdata) {
+ flxRecord *r = userdata;
+
+ g_assert(m);
+ g_assert(i);
+ g_assert(r);
+
+ flx_interface_post_response(i, r, FALSE);
+}
+
+void flx_server_post_response(flxServer *s, gint interface, guchar protocol, flxRecord *record) {
+ g_assert(s);
+ g_assert(record);
+
+ flx_interface_monitor_walk(s->monitor, interface, protocol, post_response_callback, record);
}
projects / catta / blobdiff