interface: include libubox/utils.h
[project/mdnsd.git] / cache.c
diff --git a/cache.c b/cache.c
index 7c7a8fb..07d4f20 100644 (file)
--- a/cache.c
+++ b/cache.c
@@ -239,6 +239,7 @@ cache_answer(struct interface *iface, uint8_t *base, int blen, char *name, struc
        void *rdata_ptr, *txt_ptr;
        int host_len = 0;
        static char *rdata_buffer = (char *) mdns_buf;
+       time_t now = monotonic_time();
 
        nlen = strlen(name);
 
@@ -261,7 +262,10 @@ cache_answer(struct interface *iface, uint8_t *base, int blen, char *name, struc
                        host_len = rdlength - nlen - 1;
 
                cache_service(iface, rdata_buffer, host_len, a->ttl);
-               return;
+
+               dlen = strlen(rdata_buffer) + 1;
+               rdata = (uint8_t*)rdata_buffer;
+               break;
 
        case TYPE_SRV:
                if (a->rdlength < 8)
@@ -319,9 +323,10 @@ cache_answer(struct interface *iface, uint8_t *base, int blen, char *name, struc
        if (r) {
                if (!a->ttl) {
                        DBG(1, "D -> %s %s ttl:%d\n", dns_type_string(r->type), r->record, r->ttl);
-                       r->time = monotonic_time() + 1 - r->ttl;
+                       r->time = now + 1 - r->ttl;
                } else {
                        r->ttl = a->ttl;
+                       r->time = now;
                        DBG(1, "A -> %s %s ttl:%d\n", dns_type_string(r->type), r->record, r->ttl);
                }
                return;
@@ -340,7 +345,7 @@ cache_answer(struct interface *iface, uint8_t *base, int blen, char *name, struc
        r->ttl = a->ttl;
        r->port = port;
        r->rdlength = dlen;
-       r->time = monotonic_time();
+       r->time = now;
        r->iface = iface;
 
        if (tlen)
@@ -399,3 +404,76 @@ cache_dump_records(struct blob_buf *buf, const char *name)
                        break;
        }
 }
+
+void
+cache_dump_recursive(struct blob_buf *b, const char *name, uint16_t type, struct interface *iface)
+{
+       time_t now = monotonic_time();
+       for (struct cache_record *r = avl_find_ge_element(&records, name, r, avl);
+                       r && !strcmp(r->record, name);
+                       r = !avl_is_last(&records, &r->avl) ? avl_next_element(r, avl) : NULL) {
+               int32_t ttl = r->ttl - (now - r->time);
+               if (ttl <= 0 || (iface && iface->ifindex != r->iface->ifindex) ||
+                               (type != TYPE_ANY && type != r->type))
+                       continue;
+
+               const char *txt;
+               char buf[INET6_ADDRSTRLEN];
+               void *k = blobmsg_open_table(b, NULL), *l;
+               const struct dns_srv_data *dsd = (const struct dns_srv_data*)r->rdata;
+
+               blobmsg_add_string(b, "name", r->record);
+               blobmsg_add_string(b, "type", dns_type_string(r->type));
+               blobmsg_add_u32(b, "ttl", ttl);
+
+               switch (r->type) {
+               case TYPE_TXT:
+                       if ((txt = r->txt) && strlen(txt)) {
+                               l = blobmsg_open_array(b, "data");
+                               do {
+                                       blobmsg_add_string(b, NULL, txt);
+                                       txt = &txt[strlen(txt) + 1];
+                               } while (*txt);
+                               blobmsg_close_array(b, l);
+                       }
+                       break;
+
+               case TYPE_SRV:
+                       if (r->rdlength > sizeof(*dsd)) {
+                               blobmsg_add_u32(b, "priority", be16_to_cpu(dsd->priority));
+                               blobmsg_add_u32(b, "weight", be16_to_cpu(dsd->weight));
+                               blobmsg_add_u32(b, "port", be16_to_cpu(dsd->port));
+                               blobmsg_add_string(b, "target", (const char*)&dsd[1]);
+                       }
+                       break;
+
+               case TYPE_PTR:
+                       if (r->rdlength > 0)
+                               blobmsg_add_string(b, "target", (const char*)r->rdata);
+                       break;
+
+               case TYPE_A:
+                       if ((r->rdlength == 4) && inet_ntop(AF_INET, r->rdata, buf, sizeof(buf)))
+                               blobmsg_add_string(b, "target", buf);
+                       break;
+
+               case TYPE_AAAA:
+                       if ((r->rdlength == 16) && inet_ntop(AF_INET6, r->rdata, buf, sizeof(buf)))
+                               blobmsg_add_string(b, "target", buf);
+                       break;
+               }
+
+               blobmsg_close_table(b, k);
+
+
+               if (r->type == TYPE_PTR) {
+                       cache_dump_recursive(b, (const char*)r->rdata, TYPE_SRV, iface);
+                       cache_dump_recursive(b, (const char*)r->rdata, TYPE_TXT, iface);
+               }
+
+               if (r->type == TYPE_SRV) {
+                       cache_dump_recursive(b, (const char*)&dsd[1], TYPE_A, iface);
+                       cache_dump_recursive(b, (const char*)&dsd[1], TYPE_AAAA, iface);
+               }
+       }
+}