1 /* SPDX-License-Identifier: LGPL-2.1+ */
4 #include <netinet/ether.h>
5 #include <netinet/in.h>
8 #include <sys/socket.h>
11 #include <linux/netlink.h>
12 #include <linux/if_infiniband.h>
13 #include <linux/if_packet.h>
19 union sockaddr_union {
20 /* The minimal, abstract version */
23 /* The libc provided version that allocates "enough room" for every protocol */
24 struct sockaddr_storage storage;
26 /* Protoctol-specific implementations */
27 struct sockaddr_in in;
28 struct sockaddr_in6 in6;
29 struct sockaddr_un un;
30 #if 0 /// UNNEEDED by elogind.
31 struct sockaddr_nl nl;
32 struct sockaddr_ll ll;
34 struct sockaddr_vm vm;
36 /* Ensure there is enough space to store Infiniband addresses */
37 uint8_t ll_buffer[offsetof(struct sockaddr_ll, sll_addr) + CONST_MAX(ETH_ALEN, INFINIBAND_ALEN)];
39 /* Ensure there is enough space after the AF_UNIX sun_path for one more NUL byte, just to be sure that the path
40 * component is always followed by at least one NUL byte. */
41 uint8_t un_buffer[sizeof(struct sockaddr_un) + 1];
44 #if 0 /// UNNEEDED by elogind
45 typedef struct SocketAddress {
46 union sockaddr_union sockaddr;
48 /* We store the size here explicitly due to the weird
49 * sockaddr_un semantics for abstract sockets */
52 /* Socket type, i.e. SOCK_STREAM, SOCK_DGRAM, ... */
55 /* Socket protocol, IPPROTO_xxx, usually 0, except for netlink */
59 typedef enum SocketAddressBindIPv6Only {
60 SOCKET_ADDRESS_DEFAULT,
62 SOCKET_ADDRESS_IPV6_ONLY,
63 _SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX,
64 _SOCKET_ADDRESS_BIND_IPV6_ONLY_INVALID = -1
65 } SocketAddressBindIPv6Only;
67 #define socket_address_family(a) ((a)->sockaddr.sa.sa_family)
69 const char* socket_address_type_to_string(int t) _const_;
70 int socket_address_type_from_string(const char *s) _pure_;
72 int socket_address_parse(SocketAddress *a, const char *s);
73 int socket_address_parse_and_warn(SocketAddress *a, const char *s);
74 int socket_address_parse_netlink(SocketAddress *a, const char *s);
75 int socket_address_print(const SocketAddress *a, char **p);
76 int socket_address_verify(const SocketAddress *a) _pure_;
77 int socket_address_unlink(SocketAddress *a);
79 bool socket_address_can_accept(const SocketAddress *a) _pure_;
81 int socket_address_listen(
82 const SocketAddress *a,
85 SocketAddressBindIPv6Only only,
86 const char *bind_to_device,
90 mode_t directory_mode,
93 int make_socket_fd(int log_level, const char* address, int type, int flags);
95 bool socket_address_is(const SocketAddress *a, const char *s, int type);
96 bool socket_address_is_netlink(const SocketAddress *a, const char *s);
98 bool socket_address_matches_fd(const SocketAddress *a, int fd);
100 bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_;
102 const char* socket_address_get_path(const SocketAddress *a);
104 bool socket_ipv6_is_supported(void);
107 int sockaddr_port(const struct sockaddr *_sa, unsigned *port);
109 #if 0 /// UNNEEDED by elogind
110 int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret);
111 int getpeername_pretty(int fd, bool include_port, char **ret);
112 int getsockname_pretty(int fd, char **ret);
114 int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret);
116 const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_;
117 SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_;
118 SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s);
120 int netlink_family_to_string_alloc(int b, char **s);
121 int netlink_family_from_string(const char *s) _pure_;
123 bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b);
126 int fd_inc_sndbuf(int fd, size_t n);
127 int fd_inc_rcvbuf(int fd, size_t n);
128 #if 0 /// UNNEEDED by elogind
130 int ip_tos_to_string_alloc(int i, char **s);
131 int ip_tos_from_string(const char *s);
133 bool ifname_valid(const char *p);
134 bool address_label_valid(const char *p);
137 int getpeercred(int fd, struct ucred *ucred);
138 int getpeersec(int fd, char **ret);
139 int getpeergroups(int fd, gid_t **ret);
141 int send_one_fd_sa(int transport_fd,
143 const struct sockaddr *sa, socklen_t len,
145 #define send_one_fd(transport_fd, fd, flags) send_one_fd_sa(transport_fd, fd, NULL, 0, flags)
146 #if 0 /// UNNEEDED by elogind
147 int receive_one_fd(int transport_fd, int flags);
149 ssize_t next_datagram_size_fd(int fd);
151 int flush_accept(int fd);
154 #define CMSG_FOREACH(cmsg, mh) \
155 for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg)))
157 #if 0 /// UNNEEDED by elogind
158 struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length);
162 * Certain hardware address types (e.g Infiniband) do not fit into sll_addr
163 * (8 bytes) and run over the structure. This macro returns the correct size that
164 * must be passed to kernel.
166 #define SOCKADDR_LL_LEN(sa) \
168 const struct sockaddr_ll *_sa = &(sa); \
169 size_t _mac_len = sizeof(_sa->sll_addr); \
170 assert(_sa->sll_family == AF_PACKET); \
171 if (be16toh(_sa->sll_hatype) == ARPHRD_ETHER) \
172 _mac_len = MAX(_mac_len, (size_t) ETH_ALEN); \
173 if (be16toh(_sa->sll_hatype) == ARPHRD_INFINIBAND) \
174 _mac_len = MAX(_mac_len, (size_t) INFINIBAND_ALEN); \
175 offsetof(struct sockaddr_ll, sll_addr) + _mac_len; \
178 /* Covers only file system and abstract AF_UNIX socket addresses, but not unnamed socket addresses. */
179 #define SOCKADDR_UN_LEN(sa) \
181 const struct sockaddr_un *_sa = &(sa); \
182 assert(_sa->sun_family == AF_UNIX); \
183 offsetof(struct sockaddr_un, sun_path) + \
184 (_sa->sun_path[0] == 0 ? \
185 1 + strnlen(_sa->sun_path+1, sizeof(_sa->sun_path)-1) : \
186 strnlen(_sa->sun_path, sizeof(_sa->sun_path))); \
189 #if 0 /// UNNEEDED by elogind
190 int socket_ioctl_fd(void);