From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 22 Mar 2005 18:01:38 +0000 (+0000)
Subject: make the daemon response to queries
X-Git-Url: https://git.meshlink.io/?a=commitdiff_plain;h=54247ce93dc6f048c0ffea546f454653ce0e25a8;p=catta

make the daemon response to queries


git-svn-id: file:///home/lennart/svn/public/avahi/trunk@13 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe
---

diff --git a/dns.c b/dns.c
index 5c2180d..a787723 100644
--- a/dns.c
+++ b/dns.c
@@ -78,6 +78,31 @@ guint8* flx_dns_packet_append_uint16(flxDnsPacket *p, guint16 v) {
     return d;
 }
 
+guint8 *flx_dns_packet_append_uint32(flxDnsPacket *p, guint32 v) {
+    guint8 *d;
+
+    g_assert(p);
+    d = flx_dns_packet_extend(p, sizeof(guint32));
+    *((guint32*) d) = g_htonl(v);
+
+    return d;
+}
+
+guint8 *flx_dns_packet_append_bytes(flxDnsPacket  *p, gconstpointer b, guint l) {
+    guint8* d;
+
+    g_assert(p);
+    g_assert(b);
+    g_assert(l);
+    
+    d = flx_dns_packet_extend(p, l);
+    g_assert(d);
+    memcpy(d, b, l);
+
+    return d;
+}
+
+
 guint8 *flx_dns_packet_extend(flxDnsPacket *p, guint l) {
     guint8 *d;
     
@@ -321,6 +346,18 @@ guint8* flx_dns_packet_append_key(flxDnsPacket *p, flxKey *k) {
 }
 
 guint8* flx_dns_packet_append_record(flxDnsPacket *p, flxRecord *r, gboolean cache_flush) {
+    guint8 *t;
 
-    
+    g_assert(p);
+    g_assert(r);
+
+    if (!(t = flx_dns_packet_append_name(p, r->key->name)) ||
+        !flx_dns_packet_append_uint16(p, r->key->type) ||
+        !flx_dns_packet_append_uint16(p, cache_flush ? (r->key->class | MDNS_CACHE_FLUSH) : (r->key->class &~ MDNS_CACHE_FLUSH)) ||
+        !flx_dns_packet_append_uint32(p, r->ttl) ||
+        !flx_dns_packet_append_uint16(p, r->size) ||
+        !flx_dns_packet_append_bytes(p, r->data, r->size))
+        return NULL;
+
+    return t;
 }
diff --git a/dns.h b/dns.h
index a737536..bdb0f07 100644
--- a/dns.h
+++ b/dns.h
@@ -17,25 +17,29 @@ void flx_dns_packet_free(flxDnsPacket *p);
 void flx_dns_packet_set_field(flxDnsPacket *p, guint index, guint16 v);
 guint16 flx_dns_packet_get_field(flxDnsPacket *p, guint index);
 
+guint8 *flx_dns_packet_extend(flxDnsPacket *p, guint l);
+
 guint8 *flx_dns_packet_append_uint16(flxDnsPacket *p, guint16 v);
+guint8 *flx_dns_packet_append_uint32(flxDnsPacket *p, guint32 v);
 guint8 *flx_dns_packet_append_name(flxDnsPacket *p, const gchar *name);
 guint8 *flx_dns_packet_append_name_compressed(flxDnsPacket *p, const gchar *name, guint8 *prev);
-guint8 *flx_dns_packet_extend(flxDnsPacket *p, guint l);
+guint8 *flx_dns_packet_append_bytes(flxDnsPacket  *p, gconstpointer, guint l);
+guint8* flx_dns_packet_append_key(flxDnsPacket *p, flxKey *k);
+guint8* flx_dns_packet_append_record(flxDnsPacket *p, flxRecord *r, gboolean cache_flush);
+
 gint flx_dns_packet_is_query(flxDnsPacket *p);
 gint flx_dns_packet_check_valid(flxDnsPacket *p);
 
-gint flx_dns_packet_consume_name(flxDnsPacket *p, gchar *ret_name, guint l);
 gint flx_dns_packet_consume_uint16(flxDnsPacket *p, guint16 *ret_v);
 gint flx_dns_packet_consume_uint32(flxDnsPacket *p, guint32 *ret_v);
+gint flx_dns_packet_consume_name(flxDnsPacket *p, gchar *ret_name, guint l);
 gint flx_dns_packet_consume_bytes(flxDnsPacket *p, gpointer ret_data, guint l);
+flxKey* flx_dns_packet_consume_key(flxDnsPacket *p);
+flxRecord* flx_dns_packet_consume_record(flxDnsPacket *p, gboolean *ret_cache_flush);
 
 gconstpointer flx_dns_packet_get_rptr(flxDnsPacket *p);
 
-flxKey* flx_dns_packet_consume_key(flxDnsPacket *p);
-flxRecord* flx_dns_packet_consume_record(flxDnsPacket *p, gboolean *ret_cache_flush);
 
-guint8* flx_dns_packet_append_key(flxDnsPacket *p, flxKey *k);
-guint8* flx_dns_packet_append_record(flxDnsPacket *p, flxRecord *r, gboolean cache_flush);
 
 gint flx_dns_packet_skip(flxDnsPacket *p, guint length);
 
diff --git a/iface.c b/iface.c
index 8c31d8f..9acef47 100644
--- a/iface.c
+++ b/iface.c
@@ -344,20 +344,10 @@ int flx_address_is_relevant(flxInterfaceAddress *a) {
         flx_interface_is_relevant(a->interface);
 }
 
-void flx_interface_send_query(flxInterface *i, guchar protocol, flxKey *k) {
-    flxDnsPacket *p;
+void flx_interface_send_packet(flxInterface *i, guchar protocol, flxDnsPacket *p) {
     g_assert(i);
-    g_assert(k);
-
-    p = flx_dns_packet_new();
-    flx_dns_packet_set_field(p, DNS_FIELD_FLAGS, DNS_FLAGS(0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
-
-    flx_dns_packet_append_name(p, k->name);
-    flx_dns_packet_append_uint16(p, k->type);
-    flx_dns_packet_append_uint16(p, k->class);
-
-    flx_dns_packet_set_field(p, DNS_FIELD_QDCOUNT, 1);
-
+    g_assert(p);
+    
     if ((protocol == AF_INET || protocol == AF_UNSPEC) && i->n_ipv4_addrs > 0 && flx_interface_is_relevant(i)) {
         g_message("sending on '%s':IPv4", i->name);
         flx_send_dns_packet_ipv4(i->monitor->server->fd_ipv4, i->index, p);
@@ -367,27 +357,36 @@ void flx_interface_send_query(flxInterface *i, guchar protocol, flxKey *k) {
         g_message("sending on '%s':IPv6", i->name);
         flx_send_dns_packet_ipv6(i->monitor->server->fd_ipv6, i->index, p);
     }
+}
+
+void flx_interface_send_query(flxInterface *i, guchar protocol, flxKey *k) {
+    flxDnsPacket *p;
     
+    g_assert(i);
+    g_assert(k);
+
+    p = flx_dns_packet_new();
+    flx_dns_packet_set_field(p, DNS_FIELD_FLAGS, DNS_FLAGS(0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
+    flx_dns_packet_append_key(p, k);
+    flx_dns_packet_set_field(p, DNS_FIELD_QDCOUNT, 1);
+    flx_interface_send_packet(i, protocol, p);
     flx_dns_packet_free(p);
 }
 
-void flx_interface_send_response(flxinterface *i, guchar protocol, flxRecord *rr) {
-    flxDnsPacket+p;
+void flx_interface_send_response(flxInterface *i, guchar protocol, flxRecord *rr) {
+    flxDnsPacket *p;
     
     g_assert(i);
     g_assert(rr);
 
     p = flx_dns_packet_new();
     flx_dns_packet_set_field(p, DNS_FIELD_FLAGS, DNS_FLAGS(1, 0, 0, 0, 0, 0, 0, 0, 0, 0));
-
-    flx_dns_packet_append_name(p, rr->key->name);
-    flx_dns_packet_append_uint16(p, rr->key->type);
-    flx_dns_packet_append_uint16(p, rr->key->class);
-    flx_dns_packet_append_uint16
+    flx_dns_packet_append_record(p, rr, FALSE);
+    flx_dns_packet_set_field(p, DNS_FIELD_ANCOUNT, 1);
+    flx_interface_send_packet(i, protocol, p);
+    flx_dns_packet_free(p);
 }
 
-
-
 void flx_dump_caches(flxServer *s, FILE *f) {
     flxInterface *i;
     g_assert(s);
diff --git a/iface.h b/iface.h
index 207c0b2..2adab72 100644
--- a/iface.h
+++ b/iface.h
@@ -65,6 +65,7 @@ int flx_interface_is_relevant(flxInterface *i);
 int flx_address_is_relevant(flxInterfaceAddress *a);
 
 void flx_interface_send_query(flxInterface *i, guchar protocol, flxKey *k);
+void flx_interface_send_response(flxInterface *i, guchar protocol, flxRecord *rr);
 
 void flx_dump_caches(flxServer *s, FILE *f);
 
diff --git a/main.c b/main.c
index 75d03ac..94d78ac 100644
--- a/main.c
+++ b/main.c
@@ -14,6 +14,9 @@ static gboolean send_timeout(gpointer data) {
     flxServer *flx = data;
     flxKey *k;
 
+    flx_server_dump(flx, stdout);
+
+
     k = flx_key_new("cocaine.local.", FLX_DNS_CLASS_IN, FLX_DNS_TYPE_A);
     flx_server_send_query(flx, 0, AF_UNSPEC, k);
     flx_key_unref(k);
@@ -32,14 +35,13 @@ int main(int argc, char *argv[]) {
 
     loop = g_main_loop_new(NULL, FALSE);
     
-    g_timeout_add(1000*5, quit_timeout, loop);
+    /*g_timeout_add(1000*5, quit_timeout, loop);*/
     g_timeout_add(1000, send_timeout, flx);
     
     g_main_loop_run(loop);
 
     g_main_loop_unref(loop);
 
-    flx_server_dump(flx, stdout);
 
     flx_server_free(flx);
     
diff --git a/server.c b/server.c
index d4dd4ac..6027f5f 100644
--- a/server.c
+++ b/server.c
@@ -10,6 +10,16 @@
 #include "socket.h"
 
 static void post_response(flxServer *s, flxRecord *r, gint iface, const flxAddress *a) {
+    flxInterface *i;
+
+    g_assert(s);
+    g_assert(r);
+    g_assert(iface > 0);
+    g_assert(a);
+        
+    if ((i = flx_interface_monitor_get_interface(s->monitor, iface)))
+        flx_interface_send_response(i, a->family, r);
+            
 }
 
 static void handle_query_key(flxServer *s, flxKey *k, gint iface, const flxAddress *a) {
@@ -19,11 +29,13 @@ static void handle_query_key(flxServer *s, flxKey *k, gint iface, const flxAddre
     g_assert(k);
     g_assert(a);
 
-    for (e = g_hash_table_lookup(s->rrset_by_name, k); e; e = e->next_by_name) {
+    for (e = g_hash_table_lookup(s->rrset_by_name, k); e; e = e->by_name_next) {
 
         if ((e->interface <= 0 || e->interface == iface) &&
-            (e->protocol == AF_UNSPEC || e->protocol == a->family))
+            (e->protocol == AF_UNSPEC || e->protocol == a->family)) {
             post_response(s, e->record, iface, a);
+
+        }
     }
 }
 
@@ -38,7 +50,7 @@ static void handle_query(flxServer *s, flxDnsPacket *p, gint iface, const flxAdd
 
         flxKey *key;
 
-        if (!(key = flx_dns_packet_consume_query(p))) {
+        if (!(key = flx_dns_packet_consume_key(p))) {
             g_warning("Packet too short");
             return;
         }
@@ -59,7 +71,7 @@ static void add_response_to_cache(flxCache *c, flxDnsPacket *p, const flxAddress
         flxRecord *rr;
         gboolean cache_flush = FALSE;
         
-        if (!(rr = flx_dns_packet_consume_rr(p, &cache_flush))) {
+        if (!(rr = flx_dns_packet_consume_record(p, &cache_flush))) {
             g_warning("Packet too short");
             return;
         }
@@ -78,6 +90,8 @@ static void dispatch_packet(flxServer *s, flxDnsPacket *p, struct sockaddr *sa,
     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;
@@ -112,7 +126,7 @@ static void dispatch_packet(flxServer *s, flxDnsPacket *p, struct sockaddr *sa,
     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_ARCOUNT) != 0 ||
             flx_dns_packet_get_field(p, DNS_FIELD_NSCOUNT) != 0) {
             g_warning("Invalid query packet.");
             return;
diff --git a/socket.c b/socket.c
index 48cfb36..1887e1d 100644
--- a/socket.c
+++ b/socket.c
@@ -29,7 +29,7 @@ static void mdns_mcast_group_ipv4(struct sockaddr_in *ret_sa) {
 gint flx_open_socket_ipv4(void) {
     struct ip_mreqn mreq;
     struct sockaddr_in sa, local;
-    int fd = -1, ttl, yes, no;
+    int fd = -1, ttl, yes;
 
     mdns_mcast_group_ipv4(&sa);
         
@@ -56,8 +56,8 @@ gint flx_open_socket_ipv4(void) {
         goto fail;
     }
 
-    no = 0;
-    if (setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP, &no, sizeof(no)) < 0) {
+    yes = 1;
+    if (setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP, &yes, sizeof(yes)) < 0) {
         g_warning("IP_MULTICAST_LOOP failed: %s\n", strerror(errno));
         goto fail;
     }
@@ -127,7 +127,7 @@ static void mdns_mcast_group_ipv6(struct sockaddr_in6 *ret_sa) {
 gint flx_open_socket_ipv6(void) {
     struct ipv6_mreq mreq;
     struct sockaddr_in6 sa, local;
-    int fd = -1, ttl, yes, no;
+    int fd = -1, ttl, yes;
 
     mdns_mcast_group_ipv6(&sa);
         
@@ -160,8 +160,8 @@ gint flx_open_socket_ipv6(void) {
         goto fail;
     }
 
-    no = 0;
-    if (setsockopt(fd, SOL_IPV6, IPV6_MULTICAST_LOOP, &no, sizeof(no)) < 0) {
+    yes = 1;
+    if (setsockopt(fd, SOL_IPV6, IPV6_MULTICAST_LOOP, &yes, sizeof(yes)) < 0) {
         g_warning("IPV6_MULTICAST_LOOP failed: %s\n", strerror(errno));
         goto fail;
     }