#include <stdio.h>
#include <errno.h>
+#include <libubox/usock.h>
+#include <libubox/uloop.h>
#include <libubox/avl-cmp.h>
#include <libubox/utils.h>
#include "interface.h"
#include "dns.h"
#include "announce.h"
-struct interface *cur_iface = NULL;
-
int
interface_send_packet(struct interface *iface, struct iovec *iov, int iov_len)
{
return sendmsg(fd, &m, 0);
}
-static void interface_free(struct interface *iface)
+static void interface_close(struct interface *iface)
{
- if (cur_iface == iface)
- cur_iface = NULL;
+ if (iface->fd.fd < 0)
+ return;
announce_free(iface);
- if (iface->fd.fd >= 0) {
- uloop_fd_delete(&iface->fd);
- close(iface->fd.fd);
- }
- free(iface);
+ uloop_fd_delete(&iface->fd);
+ close(iface->fd.fd);
+ iface->fd.fd = -1;
}
-static void interface_start(struct interface *iface)
+static void interface_free(struct interface *iface)
{
- cur_iface = iface;
+ interface_close(iface);
+ free(iface);
}
static void
-iface_update_cb(struct vlist_tree *tree, struct vlist_node *node_new,
- struct vlist_node *node_old)
+read_socket(struct uloop_fd *u, unsigned int events)
{
- struct interface *iface;
-
- if (node_old) {
- iface = container_of(node_old, struct interface, node);
- interface_free(iface);
+ struct interface *iface = container_of(u, struct interface, fd);
+ static uint8_t buffer[8 * 1024];
+ int len;
+
+ if (u->eof) {
+ interface_close(iface);
+ uloop_timeout_set(&iface->reconnect, 1000);
+ return;
}
- if (node_new) {
- iface = container_of(node_new, struct interface, node);
- interface_start(iface);
+ len = read(u->fd, buffer, sizeof(buffer));
+ if (len < 1) {
+ fprintf(stderr, "read failed: %s\n", strerror(errno));
+ return;
}
+
+ dns_handle_packet(iface, buffer, len);
}
-int interface_socket_setup(struct interface *iface)
+static int
+interface_socket_setup(struct interface *iface)
{
struct ip_mreqn mreq;
uint8_t ttl = 255;
int yes = 1;
int no = 0;
struct sockaddr_in sa = { 0 };
- struct in_addr in;
int fd = iface->fd.fd;
- inet_aton(iface->ip, &in);
-
sa.sin_family = AF_INET;
sa.sin_port = htons(MCAST_PORT);
inet_pton(AF_INET, MCAST_ADDR, &sa.sin_addr);
memset(&mreq, 0, sizeof(mreq));
- mreq.imr_address.s_addr = in.s_addr;
+ mreq.imr_address.s_addr = iface->v4_addr.s_addr;
mreq.imr_multiaddr = sa.sin_addr;
mreq.imr_ifindex = iface->ifindex;
return 0;
}
-static const char*
-get_iface_ipv4(const char *ifname)
+static void
+reconnect_socket(struct uloop_timeout *timeout)
{
- static char buffer[INET_ADDRSTRLEN];
+ struct interface *iface = container_of(timeout, struct interface, reconnect);
+
+ iface->fd.fd = usock(USOCK_UDP | USOCK_SERVER | USOCK_NONBLOCK, MCAST_ADDR, "5353");
+ if (iface->fd.fd < 0) {
+ fprintf(stderr, "failed to add listener: %s\n", strerror(errno));
+ goto retry;
+ }
+
+ if (interface_socket_setup(iface)) {
+ iface->fd.fd = -1;
+ goto retry;
+ }
+
+ uloop_fd_add(&iface->fd, ULOOP_READ);
+ dns_send_question(iface, "_services._dns-sd._udp.local", TYPE_PTR);
+ announce_init(iface);
+ return;
+
+retry:
+ uloop_timeout_set(timeout, 1000);
+}
+
+
+static void interface_start(struct interface *iface)
+{
+ iface->fd.cb = read_socket;
+ iface->reconnect.cb = reconnect_socket;
+ uloop_timeout_set(&iface->reconnect, 100);
+}
+
+static void
+iface_update_cb(struct vlist_tree *tree, struct vlist_node *node_new,
+ struct vlist_node *node_old)
+{
+ struct interface *iface;
+
+ if (node_old) {
+ iface = container_of(node_old, struct interface, node);
+ interface_free(iface);
+ }
+
+ if (node_new) {
+ iface = container_of(node_new, struct interface, node);
+ interface_start(iface);
+ }
+}
+
+static int
+get_iface_ipv4(struct interface *iface)
+{
+ struct sockaddr_in *sin;
struct ifreq ir;
- const char *ret;
- int sock;
+ int sock, ret = -1;
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0)
- return NULL;
+ return -1;
memset(&ir, 0, sizeof(struct ifreq));
- strncpy(ir.ifr_name, ifname, sizeof(ir.ifr_name));
+ strncpy(ir.ifr_name, iface->name, sizeof(ir.ifr_name));
- if (ioctl(sock, SIOCGIFADDR, &ir) < 0)
- return NULL;
+ ret = ioctl(sock, SIOCGIFADDR, &ir);
+ if (ret < 0)
+ goto out;
- ret = inet_ntop(AF_INET, &((struct sockaddr_in *) &ir.ifr_addr)->sin_addr, buffer, sizeof(buffer));
- close(sock);
+ sin = (struct sockaddr_in *) &ir.ifr_addr;
+ memcpy(&iface->v4_addr, &sin->sin_addr, sizeof(iface->v4_addr));
+out:
+ close(sock);
return ret;
}
int interface_add(const char *name)
{
struct interface *iface;
- const char *ip_str;
- char *name_buf, *ip_buf;
-
- ip_str = get_iface_ipv4(name);
- if (!ip_str)
- return -1;
+ char *name_buf;
iface = calloc_a(sizeof(*iface),
- &name_buf, strlen(name) + 1,
- &ip_buf, strlen(ip_str) + 1);
+ &name_buf, strlen(name) + 1);
iface->name = strcpy(name_buf, name);
- iface->ip = strcpy(ip_buf, ip_str);
iface->ifindex = if_nametoindex(name);
iface->fd.fd = -1;
if (iface->ifindex <= 0)
goto error;
+ if (get_iface_ipv4(iface))
+ goto error;
+
vlist_add(&interfaces, &iface->node, name);
return 0;
projects / project / mdnsd.git / blobdiff