1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2010 Lennart Poettering
10 #include <netinet/ether.h>
11 #include <netinet/in.h>
14 #include <sys/socket.h>
15 #include <sys/types.h>
17 #include <linux/netlink.h>
18 #include <linux/if_infiniband.h>
19 #include <linux/if_packet.h>
25 union sockaddr_union {
26 /* The minimal, abstract version */
29 /* The libc provided version that allocates "enough room" for every protocol */
30 struct sockaddr_storage storage;
32 /* Protoctol-specific implementations */
33 struct sockaddr_in in;
34 struct sockaddr_in6 in6;
35 struct sockaddr_un un;
36 #if 0 /// UNNEEDED by elogind.
37 struct sockaddr_nl nl;
38 struct sockaddr_ll ll;
40 struct sockaddr_vm vm;
42 /* Ensure there is enough space to store Infiniband addresses */
43 uint8_t ll_buffer[offsetof(struct sockaddr_ll, sll_addr) + CONST_MAX(ETH_ALEN, INFINIBAND_ALEN)];
45 /* Ensure there is enough space after the AF_UNIX sun_path for one more NUL byte, just to be sure that the path
46 * component is always followed by at least one NUL byte. */
47 uint8_t un_buffer[sizeof(struct sockaddr_un) + 1];
50 #if 0 /// UNNEEDED by elogind
51 typedef struct SocketAddress {
52 union sockaddr_union sockaddr;
54 /* We store the size here explicitly due to the weird
55 * sockaddr_un semantics for abstract sockets */
58 /* Socket type, i.e. SOCK_STREAM, SOCK_DGRAM, ... */
61 /* Socket protocol, IPPROTO_xxx, usually 0, except for netlink */
65 typedef enum SocketAddressBindIPv6Only {
66 SOCKET_ADDRESS_DEFAULT,
68 SOCKET_ADDRESS_IPV6_ONLY,
69 _SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX,
70 _SOCKET_ADDRESS_BIND_IPV6_ONLY_INVALID = -1
71 } SocketAddressBindIPv6Only;
73 #define socket_address_family(a) ((a)->sockaddr.sa.sa_family)
75 const char* socket_address_type_to_string(int t) _const_;
76 int socket_address_type_from_string(const char *s) _pure_;
78 int socket_address_parse(SocketAddress *a, const char *s);
79 int socket_address_parse_and_warn(SocketAddress *a, const char *s);
80 int socket_address_parse_netlink(SocketAddress *a, const char *s);
81 int socket_address_print(const SocketAddress *a, char **p);
82 int socket_address_verify(const SocketAddress *a) _pure_;
83 int socket_address_unlink(SocketAddress *a);
85 bool socket_address_can_accept(const SocketAddress *a) _pure_;
87 int socket_address_listen(
88 const SocketAddress *a,
91 SocketAddressBindIPv6Only only,
92 const char *bind_to_device,
96 mode_t directory_mode,
99 int make_socket_fd(int log_level, const char* address, int type, int flags);
101 bool socket_address_is(const SocketAddress *a, const char *s, int type);
102 bool socket_address_is_netlink(const SocketAddress *a, const char *s);
104 bool socket_address_matches_fd(const SocketAddress *a, int fd);
106 bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_;
108 const char* socket_address_get_path(const SocketAddress *a);
110 bool socket_ipv6_is_supported(void);
113 int sockaddr_port(const struct sockaddr *_sa, unsigned *port);
115 #if 0 /// UNNEEDED by elogind
116 int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret);
117 int getpeername_pretty(int fd, bool include_port, char **ret);
118 int getsockname_pretty(int fd, char **ret);
120 int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret);
122 const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_;
123 SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_;
124 SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s);
126 int netlink_family_to_string_alloc(int b, char **s);
127 int netlink_family_from_string(const char *s) _pure_;
129 bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b);
132 int fd_inc_sndbuf(int fd, size_t n);
133 int fd_inc_rcvbuf(int fd, size_t n);
134 #if 0 /// UNNEEDED by elogind
136 int ip_tos_to_string_alloc(int i, char **s);
137 int ip_tos_from_string(const char *s);
139 bool ifname_valid(const char *p);
140 bool address_label_valid(const char *p);
143 int getpeercred(int fd, struct ucred *ucred);
144 int getpeersec(int fd, char **ret);
145 int getpeergroups(int fd, gid_t **ret);
147 int send_one_fd_sa(int transport_fd,
149 const struct sockaddr *sa, socklen_t len,
151 #define send_one_fd(transport_fd, fd, flags) send_one_fd_sa(transport_fd, fd, NULL, 0, flags)
152 #if 0 /// UNNEEDED by elogind
153 int receive_one_fd(int transport_fd, int flags);
155 ssize_t next_datagram_size_fd(int fd);
157 int flush_accept(int fd);
160 #define CMSG_FOREACH(cmsg, mh) \
161 for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg)))
163 #if 0 /// UNNEEDED by elogind
164 struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length);
168 * Certain hardware address types (e.g Infiniband) do not fit into sll_addr
169 * (8 bytes) and run over the structure. This macro returns the correct size that
170 * must be passed to kernel.
172 #define SOCKADDR_LL_LEN(sa) \
174 const struct sockaddr_ll *_sa = &(sa); \
175 size_t _mac_len = sizeof(_sa->sll_addr); \
176 assert(_sa->sll_family == AF_PACKET); \
177 if (be16toh(_sa->sll_hatype) == ARPHRD_ETHER) \
178 _mac_len = MAX(_mac_len, (size_t) ETH_ALEN); \
179 if (be16toh(_sa->sll_hatype) == ARPHRD_INFINIBAND) \
180 _mac_len = MAX(_mac_len, (size_t) INFINIBAND_ALEN); \
181 offsetof(struct sockaddr_ll, sll_addr) + _mac_len; \
184 /* Covers only file system and abstract AF_UNIX socket addresses, but not unnamed socket addresses. */
185 #define SOCKADDR_UN_LEN(sa) \
187 const struct sockaddr_un *_sa = &(sa); \
188 assert(_sa->sun_family == AF_UNIX); \
189 offsetof(struct sockaddr_un, sun_path) + \
190 (_sa->sun_path[0] == 0 ? \
191 1 + strnlen(_sa->sun_path+1, sizeof(_sa->sun_path)-1) : \
192 strnlen(_sa->sun_path, sizeof(_sa->sun_path))); \
195 #if 0 /// UNNEEDED by elogind
196 int socket_ioctl_fd(void);