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5bfcc1c6ef
This patch introduces socket_ipv6_is_supported() call that checks for IPv6 availability. Code then check for it before using specific calls. In order to be less intrusive, this patch avoids IPv6 entries being parsed at all, this way we don't get such entries in the system and all other code paths are automatically ignored. However an extra check is done at socket_address_listen() to make sure of that. As the number of Netlink messages is not know upfront anymore, loopback-setup.c was refactored to dynamically calculate the sequence number and count. Lennart's suggestions were fixed and squashed with the original patch, that was sent by Gustavo Sverzut Barbieri (barbieri@profusion.mobi).
91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#ifndef foosocketutilhfoo
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#define foosocketutilhfoo
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <sys/un.h>
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#include <net/if.h>
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#include "macro.h"
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#include "util.h"
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union sockaddr_union {
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struct sockaddr sa;
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struct sockaddr_in in4;
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struct sockaddr_in6 in6;
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struct sockaddr_un un;
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struct sockaddr_storage storage;
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};
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typedef struct SocketAddress {
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union sockaddr_union sockaddr;
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/* We store the size here explicitly due to the weird
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* sockaddr_un semantics for abstract sockets */
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socklen_t size;
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/* Socket type, i.e. SOCK_STREAM, SOCK_DGRAM, ... */
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int type;
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} SocketAddress;
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typedef enum SocketAddressBindIPv6Only {
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SOCKET_ADDRESS_DEFAULT,
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SOCKET_ADDRESS_BOTH,
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SOCKET_ADDRESS_IPV6_ONLY,
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_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX,
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_SOCKET_ADDRESS_BIND_IPV6_ONLY_INVALID = -1
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} SocketAddressBindIPv6Only;
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#define socket_address_family(a) ((a)->sockaddr.sa.sa_family)
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int socket_address_parse(SocketAddress *a, const char *s);
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int socket_address_print(const SocketAddress *a, char **p);
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int socket_address_verify(const SocketAddress *a);
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bool socket_address_can_accept(const SocketAddress *a);
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int socket_address_listen(
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const SocketAddress *a,
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int backlog,
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SocketAddressBindIPv6Only only,
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const char *bind_to_device,
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bool free_bind,
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mode_t directory_mode,
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mode_t socket_mode,
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const char *label,
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int *ret);
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bool socket_address_is(const SocketAddress *a, const char *s, int type);
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bool socket_address_equal(const SocketAddress *a, const SocketAddress *b);
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bool socket_address_needs_mount(const SocketAddress *a, const char *prefix);
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const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b);
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SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s);
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bool socket_ipv6_is_supported(void);
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#endif
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