Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 : #pragma once
3 :
4 : #include <inttypes.h>
5 : #include <linux/netlink.h>
6 : #include <linux/if_ether.h>
7 : #include <linux/if_infiniband.h>
8 : #include <linux/if_packet.h>
9 : #include <netinet/in.h>
10 : #include <stdbool.h>
11 : #include <stddef.h>
12 : #include <string.h>
13 : #include <sys/socket.h>
14 : #include <sys/types.h>
15 : #include <sys/un.h>
16 :
17 : #include "macro.h"
18 : #include "missing_socket.h"
19 : #include "sparse-endian.h"
20 :
21 : union sockaddr_union {
22 : /* The minimal, abstract version */
23 : struct sockaddr sa;
24 :
25 : /* The libc provided version that allocates "enough room" for every protocol */
26 : struct sockaddr_storage storage;
27 :
28 : /* Protoctol-specific implementations */
29 : struct sockaddr_in in;
30 : struct sockaddr_in6 in6;
31 : struct sockaddr_un un;
32 : struct sockaddr_nl nl;
33 : struct sockaddr_ll ll;
34 : struct sockaddr_vm vm;
35 :
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)];
38 :
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];
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 : const char* socket_address_type_to_string(int t) _const_;
69 : int socket_address_type_from_string(const char *s) _pure_;
70 :
71 : int socket_address_parse(SocketAddress *a, const char *s);
72 : int socket_address_parse_and_warn(SocketAddress *a, const char *s);
73 : int socket_address_parse_netlink(SocketAddress *a, const char *s);
74 : int socket_address_print(const SocketAddress *a, char **p);
75 : int socket_address_verify(const SocketAddress *a, bool strict) _pure_;
76 :
77 : int sockaddr_un_unlink(const struct sockaddr_un *sa);
78 :
79 0 : static inline int socket_address_unlink(const SocketAddress *a) {
80 0 : return socket_address_family(a) == AF_UNIX ? sockaddr_un_unlink(&a->sockaddr.un) : 0;
81 : }
82 :
83 : bool socket_address_can_accept(const SocketAddress *a) _pure_;
84 :
85 : int socket_address_listen(
86 : const SocketAddress *a,
87 : int flags,
88 : int backlog,
89 : SocketAddressBindIPv6Only only,
90 : const char *bind_to_device,
91 : bool reuse_port,
92 : bool free_bind,
93 : bool transparent,
94 : mode_t directory_mode,
95 : mode_t socket_mode,
96 : const char *label);
97 : int make_socket_fd(int log_level, const char* address, int type, int flags);
98 :
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);
101 :
102 : bool socket_address_matches_fd(const SocketAddress *a, int fd);
103 :
104 : bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_;
105 :
106 : const char* socket_address_get_path(const SocketAddress *a);
107 :
108 : bool socket_ipv6_is_supported(void);
109 :
110 : int sockaddr_port(const struct sockaddr *_sa, unsigned *port);
111 :
112 : int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret);
113 : int getpeername_pretty(int fd, bool include_port, char **ret);
114 : int getsockname_pretty(int fd, char **ret);
115 :
116 : int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret);
117 :
118 : const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_;
119 : SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_;
120 : SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s);
121 :
122 : int netlink_family_to_string_alloc(int b, char **s);
123 : int netlink_family_from_string(const char *s) _pure_;
124 :
125 : bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b);
126 :
127 : int fd_inc_sndbuf(int fd, size_t n);
128 : int fd_inc_rcvbuf(int fd, size_t n);
129 :
130 : int ip_tos_to_string_alloc(int i, char **s);
131 : int ip_tos_from_string(const char *s);
132 :
133 : bool ifname_valid(const char *p);
134 : bool address_label_valid(const char *p);
135 :
136 : int getpeercred(int fd, struct ucred *ucred);
137 : int getpeersec(int fd, char **ret);
138 : int getpeergroups(int fd, gid_t **ret);
139 :
140 : ssize_t send_one_fd_iov_sa(
141 : int transport_fd,
142 : int fd,
143 : struct iovec *iov, size_t iovlen,
144 : const struct sockaddr *sa, socklen_t len,
145 : int flags);
146 : int send_one_fd_sa(int transport_fd,
147 : int fd,
148 : const struct sockaddr *sa, socklen_t len,
149 : int flags);
150 : #define send_one_fd_iov(transport_fd, fd, iov, iovlen, flags) send_one_fd_iov_sa(transport_fd, fd, iov, iovlen, NULL, 0, flags)
151 : #define send_one_fd(transport_fd, fd, flags) send_one_fd_iov_sa(transport_fd, fd, NULL, 0, NULL, 0, flags)
152 : ssize_t receive_one_fd_iov(int transport_fd, struct iovec *iov, size_t iovlen, int flags, int *ret_fd);
153 : int receive_one_fd(int transport_fd, int flags);
154 :
155 : ssize_t next_datagram_size_fd(int fd);
156 :
157 : int flush_accept(int fd);
158 :
159 : #define CMSG_FOREACH(cmsg, mh) \
160 : for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg)))
161 :
162 : struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length);
163 :
164 : /*
165 : * Certain hardware address types (e.g Infiniband) do not fit into sll_addr
166 : * (8 bytes) and run over the structure. This macro returns the correct size that
167 : * must be passed to kernel.
168 : */
169 : #define SOCKADDR_LL_LEN(sa) \
170 : ({ \
171 : const struct sockaddr_ll *_sa = &(sa); \
172 : size_t _mac_len = sizeof(_sa->sll_addr); \
173 : assert(_sa->sll_family == AF_PACKET); \
174 : if (be16toh(_sa->sll_hatype) == ARPHRD_ETHER) \
175 : _mac_len = MAX(_mac_len, (size_t) ETH_ALEN); \
176 : if (be16toh(_sa->sll_hatype) == ARPHRD_INFINIBAND) \
177 : _mac_len = MAX(_mac_len, (size_t) INFINIBAND_ALEN); \
178 : offsetof(struct sockaddr_ll, sll_addr) + _mac_len; \
179 : })
180 :
181 : /* Covers only file system and abstract AF_UNIX socket addresses, but not unnamed socket addresses. */
182 : #define SOCKADDR_UN_LEN(sa) \
183 : ({ \
184 : const struct sockaddr_un *_sa = &(sa); \
185 : assert(_sa->sun_family == AF_UNIX); \
186 : offsetof(struct sockaddr_un, sun_path) + \
187 : (_sa->sun_path[0] == 0 ? \
188 : 1 + strnlen(_sa->sun_path+1, sizeof(_sa->sun_path)-1) : \
189 : strnlen(_sa->sun_path, sizeof(_sa->sun_path))+1); \
190 : })
191 :
192 : int socket_ioctl_fd(void);
193 :
194 : int sockaddr_un_set_path(struct sockaddr_un *ret, const char *path);
195 :
196 336 : static inline int setsockopt_int(int fd, int level, int optname, int value) {
197 336 : if (setsockopt(fd, level, optname, &value, sizeof(value)) < 0)
198 11 : return -errno;
199 :
200 325 : return 0;
201 : }
202 :
203 : int socket_bind_to_ifname(int fd, const char *ifname);
204 : int socket_bind_to_ifindex(int fd, int ifindex);
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