src/socket-util.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #ifndef foosocketutilhfoo
   4 #define foosocketutilhfoo
   5
   6 /***
   7   This file is part of systemd.
   8
   9   Copyright 2010 Lennart Poettering
  10
  11   systemd is free software; you can redistribute it and/or modify it
  12   under the terms of the GNU General Public License as published by
  13   the Free Software Foundation; either version 2 of the License, or
  14   (at your option) any later version.
  15
  16   systemd is distributed in the hope that it will be useful, but
  17   WITHOUT ANY WARRANTY; without even the implied warranty of
  18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19   General Public License for more details.
  20
  21   You should have received a copy of the GNU General Public License
  22   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  23 ***/
  24
  25 #include <sys/socket.h>
  26 #include <netinet/in.h>
  27 #include <sys/un.h>
  28 #include <net/if.h>
  29 #include <asm/types.h>
  30 #include <linux/netlink.h>
  31
  32 #include "macro.h"
  33 #include "util.h"
  34
  35 union sockaddr_union {
  36         struct sockaddr sa;
  37         struct sockaddr_in in4;
  38         struct sockaddr_in6 in6;
  39         struct sockaddr_un un;
  40         struct sockaddr_nl nl;
  41         struct sockaddr_storage storage;
  42 };
  43
  44 typedef struct SocketAddress {
  45         union sockaddr_union sockaddr;
  46
  47         /* We store the size here explicitly due to the weird
  48          * sockaddr_un semantics for abstract sockets */
  49         socklen_t size;
  50
  51         /* Socket type, i.e. SOCK_STREAM, SOCK_DGRAM, ... */
  52         int type;
  53
  54         /* Socket protocol, IPPROTO_xxx, usually 0, except for netlink */
  55         int protocol;
  56 } SocketAddress;
  57
  58 typedef enum SocketAddressBindIPv6Only {
  59         SOCKET_ADDRESS_DEFAULT,
  60         SOCKET_ADDRESS_BOTH,
  61         SOCKET_ADDRESS_IPV6_ONLY,
  62         _SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX,
  63         _SOCKET_ADDRESS_BIND_IPV6_ONLY_INVALID = -1
  64 } SocketAddressBindIPv6Only;
  65
  66 #define socket_address_family(a) ((a)->sockaddr.sa.sa_family)
  67
  68 int socket_address_parse(SocketAddress *a, const char *s);
  69 int socket_address_parse_netlink(SocketAddress *a, const char *s);
  70 int socket_address_print(const SocketAddress *a, char **p);
  71 int socket_address_verify(const SocketAddress *a);
  72
  73 bool socket_address_can_accept(const SocketAddress *a);
  74
  75 int socket_address_listen(
  76                 const SocketAddress *a,
  77                 int backlog,
  78                 SocketAddressBindIPv6Only only,
  79                 const char *bind_to_device,
  80                 bool free_bind,
  81                 bool transparent,
  82                 mode_t directory_mode,
  83                 mode_t socket_mode,
  84                 const char *label,
  85                 int *ret);
  86
  87 bool socket_address_is(const SocketAddress *a, const char *s, int type);
  88 bool socket_address_is_netlink(const SocketAddress *a, const char *s);
  89
  90 bool socket_address_equal(const SocketAddress *a, const SocketAddress *b);
  91
  92 bool socket_address_needs_mount(const SocketAddress *a, const char *prefix);
  93
  94 const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b);
  95 SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s);
  96
  97 const char* netlink_family_to_string(int b);
  98 int netlink_family_from_string(const char *s);
  99
 100 bool socket_ipv6_is_supported(void);
 101
 102 #endif