interface.h

   1 /*
   2  * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
   3  * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #ifndef __MDNS_INTERFACE_H
  16 #define __MDNS_INTERFACE_H
  17
  18 #include <sys/types.h>
  19 #include <sys/uio.h>
  20
  21 #include <arpa/inet.h>
  22
  23 #include <libubox/uloop.h>
  24 #include <libubox/vlist.h>
  25
  26 extern struct vlist_tree interfaces;
  27
  28 #define SOCKTYPE_BIT_IPV6       (1 << 1)
  29 #define SOCKTYPE_BIT_UNICAST (1 << 0)
  30
  31 enum umdns_socket_type {
  32         SOCK_MC_IPV4 = 0,
  33         SOCK_UC_IPV4 = SOCKTYPE_BIT_UNICAST,
  34         SOCK_MC_IPV6 = SOCKTYPE_BIT_IPV6,
  35         SOCK_UC_IPV6 = SOCKTYPE_BIT_IPV6 | SOCKTYPE_BIT_UNICAST,
  36 };
  37
  38 struct interface_addr_list {
  39         union {
  40                 struct {
  41                         struct in_addr addr, mask;
  42                 } *v4;
  43                 struct {
  44                         struct in6_addr addr, mask;
  45                 } *v6;
  46         };
  47         int n_addr;
  48 };
  49
  50 struct interface {
  51         struct vlist_node node;
  52
  53         const char *name;
  54         enum umdns_socket_type type;
  55         int ifindex;
  56
  57         struct interface_addr_list addrs;
  58
  59         struct uloop_timeout announce_timer;
  60         int announce_state;
  61 };
  62
  63 static inline bool interface_multicast(struct interface *iface)
  64 {
  65         return !(iface->type & SOCKTYPE_BIT_UNICAST);
  66 }
  67
  68 static inline bool interface_ipv6(struct interface *iface)
  69 {
  70         return !!(iface->type & SOCKTYPE_BIT_IPV6);
  71 }
  72
  73 int interface_add(const char *name);
  74 int interface_init(void);
  75 void interface_shutdown(void);
  76 int interface_send_packet(struct interface *iface, struct sockaddr *to, struct iovec *iov, int iov_len);
  77 struct interface* interface_get(const char *name, enum umdns_socket_type type);
  78
  79 #endif