1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 Copyright 2010 Lennart Poettering
8 #include <netinet/ether.h>
9 #include <netinet/in.h>
12 #include <sys/socket.h>
13 #include <sys/types.h>
15 #include <linux/netlink.h>
16 #include <linux/if_infiniband.h>
17 #include <linux/if_packet.h>
23 union sockaddr_union {
24 /* The minimal, abstract version */
27 /* The libc provided version that allocates "enough room" for every protocol */
28 struct sockaddr_storage storage;
30 /* Protoctol-specific implementations */
31 struct sockaddr_in in;
32 struct sockaddr_in6 in6;
33 struct sockaddr_un un;
34 #if 0 /// UNNEEDED by elogind.
35 struct sockaddr_nl nl;
36 struct sockaddr_ll ll;
38 struct sockaddr_vm vm;
40 /* Ensure there is enough space to store Infiniband addresses */
41 uint8_t ll_buffer[offsetof(struct sockaddr_ll, sll_addr) + CONST_MAX(ETH_ALEN, INFINIBAND_ALEN)];
43 /* Ensure there is enough space after the AF_UNIX sun_path for one more NUL byte, just to be sure that the path
44 * component is always followed by at least one NUL byte. */
45 uint8_t un_buffer[sizeof(struct sockaddr_un) + 1];
48 #if 0 /// UNNEEDED by elogind
49 typedef struct SocketAddress {
50 union sockaddr_union sockaddr;
52 /* We store the size here explicitly due to the weird
53 * sockaddr_un semantics for abstract sockets */
56 /* Socket type, i.e. SOCK_STREAM, SOCK_DGRAM, ... */
59 /* Socket protocol, IPPROTO_xxx, usually 0, except for netlink */
63 typedef enum SocketAddressBindIPv6Only {
64 SOCKET_ADDRESS_DEFAULT,
66 SOCKET_ADDRESS_IPV6_ONLY,
67 _SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX,
68 _SOCKET_ADDRESS_BIND_IPV6_ONLY_INVALID = -1
69 } SocketAddressBindIPv6Only;
71 #define socket_address_family(a) ((a)->sockaddr.sa.sa_family)
73 const char* socket_address_type_to_string(int t) _const_;
74 int socket_address_type_from_string(const char *s) _pure_;
76 int socket_address_parse(SocketAddress *a, const char *s);
77 int socket_address_parse_and_warn(SocketAddress *a, const char *s);
78 int socket_address_parse_netlink(SocketAddress *a, const char *s);
79 int socket_address_print(const SocketAddress *a, char **p);
80 int socket_address_verify(const SocketAddress *a) _pure_;
81 int socket_address_unlink(SocketAddress *a);
83 bool socket_address_can_accept(const SocketAddress *a) _pure_;
85 int socket_address_listen(
86 const SocketAddress *a,
89 SocketAddressBindIPv6Only only,
90 const char *bind_to_device,
94 mode_t directory_mode,
97 int make_socket_fd(int log_level, const char* address, int type, int flags);
99 bool socket_address_is(const SocketAddress *a, const char *s, int type);
100 bool socket_address_is_netlink(const SocketAddress *a, const char *s);
102 bool socket_address_matches_fd(const SocketAddress *a, int fd);
104 bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_;
106 const char* socket_address_get_path(const SocketAddress *a);
108 bool socket_ipv6_is_supported(void);
111 int sockaddr_port(const struct sockaddr *_sa, unsigned *port);
113 #if 0 /// UNNEEDED by elogind
114 int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret);
115 int getpeername_pretty(int fd, bool include_port, char **ret);
116 int getsockname_pretty(int fd, char **ret);
118 int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret);
120 const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_;
121 SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_;
122 SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s);
124 int netlink_family_to_string_alloc(int b, char **s);
125 int netlink_family_from_string(const char *s) _pure_;
127 bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b);
130 int fd_inc_sndbuf(int fd, size_t n);
131 int fd_inc_rcvbuf(int fd, size_t n);
132 #if 0 /// UNNEEDED by elogind
134 int ip_tos_to_string_alloc(int i, char **s);
135 int ip_tos_from_string(const char *s);
137 bool ifname_valid(const char *p);
138 bool address_label_valid(const char *p);
141 int getpeercred(int fd, struct ucred *ucred);
142 int getpeersec(int fd, char **ret);
143 int getpeergroups(int fd, gid_t **ret);
145 int send_one_fd_sa(int transport_fd,
147 const struct sockaddr *sa, socklen_t len,
149 #define send_one_fd(transport_fd, fd, flags) send_one_fd_sa(transport_fd, fd, NULL, 0, flags)
150 #if 0 /// UNNEEDED by elogind
151 int receive_one_fd(int transport_fd, int flags);
153 ssize_t next_datagram_size_fd(int fd);
155 int flush_accept(int fd);
158 #define CMSG_FOREACH(cmsg, mh) \
159 for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg)))
161 #if 0 /// UNNEEDED by elogind
162 struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length);
166 * Certain hardware address types (e.g Infiniband) do not fit into sll_addr
167 * (8 bytes) and run over the structure. This macro returns the correct size that
168 * must be passed to kernel.
170 #define SOCKADDR_LL_LEN(sa) \
172 const struct sockaddr_ll *_sa = &(sa); \
173 size_t _mac_len = sizeof(_sa->sll_addr); \
174 assert(_sa->sll_family == AF_PACKET); \
175 if (be16toh(_sa->sll_hatype) == ARPHRD_ETHER) \
176 _mac_len = MAX(_mac_len, (size_t) ETH_ALEN); \
177 if (be16toh(_sa->sll_hatype) == ARPHRD_INFINIBAND) \
178 _mac_len = MAX(_mac_len, (size_t) INFINIBAND_ALEN); \
179 offsetof(struct sockaddr_ll, sll_addr) + _mac_len; \
182 /* Covers only file system and abstract AF_UNIX socket addresses, but not unnamed socket addresses. */
183 #define SOCKADDR_UN_LEN(sa) \
185 const struct sockaddr_un *_sa = &(sa); \
186 assert(_sa->sun_family == AF_UNIX); \
187 offsetof(struct sockaddr_un, sun_path) + \
188 (_sa->sun_path[0] == 0 ? \
189 1 + strnlen(_sa->sun_path+1, sizeof(_sa->sun_path)-1) : \
190 strnlen(_sa->sun_path, sizeof(_sa->sun_path))); \
193 #if 0 /// UNNEEDED by elogind
194 int socket_ioctl_fd(void);