#include <arpa/nameser.h>
#include <sys/socket.h>
+#include <ifaddrs.h>
#include <resolv.h>
#include <glob.h>
#include <stdio.h>
#include "service.h"
#include "util.h"
#include "interface.h"
+#include "announce.h"
enum {
SERVICE_PORT,
[SERVICE_TXT] = { .name = "txt", .type = BLOBMSG_TYPE_ARRAY },
};
-static const struct uci_blob_param_list service_attr_list = {
- .n_params = __SERVICE_MAX,
- .params = service_policy,
-};
-
static void
service_update(struct vlist_tree *tree, struct vlist_node *node_new,
struct vlist_node *node_old);
static struct blob_buf b;
static VLIST_TREE(services, avl_strcmp, service_update, false, false);
-char *hostname = NULL;
static char *sdudp = "_services._dns-sd._udp.local";
static char *sdtcp = "_services._dns-sd._tcp.local";
-char *
+static const char *
service_name(const char *domain)
{
static char buffer[256];
- snprintf(buffer, sizeof(buffer), "%s.%s", hostname, domain);
+ snprintf(buffer, sizeof(buffer), "%s.%s", mdns_hostname, domain);
return buffer;
}
static void
-service_add_ptr(struct service *s)
-{
- unsigned char buffer[MAX_NAME_LEN];
- const char *host = service_name(s->service);
- int len = dn_comp(host, buffer, MAX_NAME_LEN, NULL, NULL);
-
- if (len < 1)
- return;
-
- dns_add_answer(TYPE_PTR, buffer, len);
-}
-
-static void
-service_add_ptr_c(const char *host)
-{
- unsigned char buffer[MAX_NAME_LEN];
- int len = dn_comp(host, buffer, MAX_NAME_LEN, NULL, NULL);
-
- if (len < 1)
- return;
-
- dns_add_answer(TYPE_PTR, buffer, len);
-}
-
-static void
-service_send_a(struct interface *iface)
+service_add_ptr(const char *host, int ttl)
{
- unsigned char buffer[MAX_NAME_LEN];
- char *host = service_name("local");
- int len = dn_comp(host, buffer, MAX_NAME_LEN, NULL, NULL);
+ int len = dn_comp(host, mdns_buf, sizeof(mdns_buf), NULL, NULL);
if (len < 1)
return;
- dns_add_answer(TYPE_A, (uint8_t *) &iface->v4_addr.s_addr, 4);
+ dns_add_answer(TYPE_PTR, mdns_buf, len, ttl);
}
static void
-service_add_srv(struct service *s)
+service_add_srv(struct service *s, int ttl)
{
- unsigned char buffer[MAX_NAME_LEN];
- struct dns_srv_data *sd;
- char *host = service_name("local");
- int len = dn_comp(host, buffer, MAX_NAME_LEN, NULL, NULL);
+ struct dns_srv_data *sd = (struct dns_srv_data *) mdns_buf;
+ int len = sizeof(*sd);
- if (len < 1)
- return;
-
- sd = calloc(1, len + sizeof(struct dns_srv_data));
- if (!sd)
+ len += dn_comp(mdns_hostname_local, mdns_buf + len, sizeof(mdns_buf) - len, NULL, NULL);
+ if (len <= sizeof(*sd))
return;
sd->port = cpu_to_be16(s->port);
- memcpy(&sd[1], buffer, len);
- host = service_name(s->service);
- dns_add_answer(TYPE_SRV, (uint8_t *) sd, len + sizeof(struct dns_srv_data));
- free(sd);
+ dns_add_answer(TYPE_SRV, mdns_buf, len, ttl);
}
#define TOUT_LOOKUP 60
}
void
-service_reply_a(struct interface *iface, int type)
+service_reply_a(struct interface *iface, int type, int ttl)
{
- if (type != TYPE_A)
- return;
+ struct ifaddrs *ifap, *ifa;
+ struct sockaddr_in *sa;
+ struct sockaddr_in6 *sa6;
+ char *addr;
+
+ getifaddrs(&ifap);
dns_init_answer();
- service_send_a(iface);
- dns_send_answer(iface, service_name("local"));
+ for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
+ if (strcmp(ifa->ifa_name, iface->name))
+ continue;
+ if (ifa->ifa_addr->sa_family==AF_INET) {
+ sa = (struct sockaddr_in *) ifa->ifa_addr;
+ addr = inet_ntoa(sa->sin_addr);
+ printf("Interface: %s\tAddress4: %s\n", ifa->ifa_name, addr);
+ dns_add_answer(TYPE_A, (uint8_t *) &sa->sin_addr, 4, ttl);
+ }
+ if (ifa->ifa_addr->sa_family==AF_INET6) {
+ uint8_t ll_prefix[] = {0xfe, 0x80 };
+ char buf[64] = { 0 };
+ sa6 = (struct sockaddr_in6 *) ifa->ifa_addr;
+ if (!memcmp(&sa6->sin6_addr, &ll_prefix, 2)) {
+ if (inet_ntop(AF_INET6, &sa6->sin6_addr, buf, 64))
+ printf("Interface: %s\tAddress6: %s\n", ifa->ifa_name, buf);
+ dns_add_answer(TYPE_AAAA, (uint8_t *) &sa6->sin6_addr, 16, ttl);
+ }
+ }
+ }
+ dns_send_answer(iface, mdns_hostname_local);
+
+ freeifaddrs(ifap);
}
-void
-service_reply(struct interface *iface, const char *match)
+static void
+service_reply_single(struct interface *iface, struct service *s, const char *match, int ttl)
{
- struct service *s;
+ const char *host = service_name(s->service);
+ char *service = strstr(host, "._");
- vlist_for_each_element(&services, s, node) {
- char *host = service_name(s->service);
- char *service = strstr(host, "._");
+ if (!s->active || !service || !service_timeout(s))
+ return;
- if (!s->active || !service || !service_timeout(s))
- continue;
+ service++;
- service++;
+ if (match && strcmp(match, s->service))
+ return;
- if (match && strcmp(match, s->service))
- continue;
+ dns_init_answer();
+ service_add_ptr(service_name(s->service), ttl);
+ dns_send_answer(iface, service);
- dns_init_answer();
- service_add_ptr(s);
- dns_send_answer(iface, service);
+ dns_init_answer();
+ service_add_srv(s, ttl);
+ if (s->txt && s->txt_len)
+ dns_add_answer(TYPE_TXT, (uint8_t *) s->txt, s->txt_len, ttl);
+ dns_send_answer(iface, host);
+}
- dns_init_answer();
- service_add_srv(s);
- if (s->txt && s->txt_len)
- dns_add_answer(TYPE_TXT, (uint8_t *) s->txt, s->txt_len);
- dns_send_answer(iface, host);
- }
+void
+service_reply(struct interface *iface, const char *match, int ttl)
+{
+ struct service *s;
+
+ vlist_for_each_element(&services, s, node)
+ service_reply_single(iface, s, match, ttl);
if (match)
return;
- dns_init_answer();
- service_send_a(iface);
- dns_send_answer(iface, service_name("local"));
+ service_reply_a(iface, TYPE_A, ttl);
}
void
continue;
s->t = 0;
dns_init_answer();
- service_add_ptr_c(s->service);
+ service_add_ptr(s->service, announce_ttl);
if (tcp)
dns_send_answer(iface, sdtcp);
else
dns_send_answer(iface, sdudp);
- service_reply(iface, s->service);
+ service_reply(iface, s->service, announce_ttl);
}
}
service_update(struct vlist_tree *tree, struct vlist_node *node_new,
struct vlist_node *node_old)
{
+ struct interface *iface;
struct service *s;
if (!node_old)
return;
s = container_of(node_old, struct service, node);
+
+ if (!node_new)
+ vlist_for_each_element(&interfaces, iface, node)
+ service_reply_single(iface, s, NULL, 0);
+
free(s);
}
void
service_init(void)
{
- if (!hostname)
- hostname = get_hostname();
+ get_hostname();
vlist_update(&services);
service_load("/tmp/run/mdnsd/*");
projects / project / mdnsd.git / blobdiff