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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
c2f1db8f | 2 | #pragma once |
42f4e3c4 | 3 | |
ef118d00 YW |
4 | #include <inttypes.h> |
5 | #include <linux/netlink.h> | |
8f815e8b | 6 | #include <linux/if_ether.h> |
ef118d00 YW |
7 | #include <linux/if_infiniband.h> |
8 | #include <linux/if_packet.h> | |
71d35b6b | 9 | #include <netinet/in.h> |
11c3a366 TA |
10 | #include <stdbool.h> |
11 | #include <stddef.h> | |
56fb30d9 | 12 | #include <string.h> |
71d35b6b | 13 | #include <sys/socket.h> |
11c3a366 | 14 | #include <sys/types.h> |
42f4e3c4 LP |
15 | #include <sys/un.h> |
16 | ||
17 | #include "macro.h" | |
ef118d00 YW |
18 | #include "missing_socket.h" |
19 | #include "sparse-endian.h" | |
42f4e3c4 | 20 | |
f6144808 | 21 | union sockaddr_union { |
8b7f989a | 22 | /* The minimal, abstract version */ |
f6144808 | 23 | struct sockaddr sa; |
8b7f989a LP |
24 | |
25 | /* The libc provided version that allocates "enough room" for every protocol */ | |
26 | struct sockaddr_storage storage; | |
27 | ||
28 | /* Protoctol-specific implementations */ | |
4d49b48c | 29 | struct sockaddr_in in; |
f6144808 LP |
30 | struct sockaddr_in6 in6; |
31 | struct sockaddr_un un; | |
7a22745a | 32 | struct sockaddr_nl nl; |
e88bc795 | 33 | struct sockaddr_ll ll; |
0fc0f14b | 34 | struct sockaddr_vm vm; |
8b7f989a | 35 | |
b1f24b75 BG |
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)]; | |
8b7f989a LP |
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]; | |
f6144808 LP |
42 | }; |
43 | ||
5c3fa98d ZJS |
44 | #define SUN_PATH_LEN (sizeof(((struct sockaddr_un){}).sun_path)) |
45 | ||
542563ba | 46 | typedef struct SocketAddress { |
f6144808 | 47 | union sockaddr_union sockaddr; |
42f4e3c4 LP |
48 | |
49 | /* We store the size here explicitly due to the weird | |
50 | * sockaddr_un semantics for abstract sockets */ | |
51 | socklen_t size; | |
52 | ||
53 | /* Socket type, i.e. SOCK_STREAM, SOCK_DGRAM, ... */ | |
54 | int type; | |
7a22745a LP |
55 | |
56 | /* Socket protocol, IPPROTO_xxx, usually 0, except for netlink */ | |
57 | int protocol; | |
542563ba | 58 | } SocketAddress; |
42f4e3c4 | 59 | |
542563ba LP |
60 | typedef enum SocketAddressBindIPv6Only { |
61 | SOCKET_ADDRESS_DEFAULT, | |
62 | SOCKET_ADDRESS_BOTH, | |
c0120d99 LP |
63 | SOCKET_ADDRESS_IPV6_ONLY, |
64 | _SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX, | |
65 | _SOCKET_ADDRESS_BIND_IPV6_ONLY_INVALID = -1 | |
542563ba | 66 | } SocketAddressBindIPv6Only; |
42f4e3c4 | 67 | |
542563ba | 68 | #define socket_address_family(a) ((a)->sockaddr.sa.sa_family) |
42f4e3c4 | 69 | |
398ce0bc YW |
70 | const char* socket_address_type_to_string(int t) _const_; |
71 | int socket_address_type_from_string(const char *s) _pure_; | |
72 | ||
9f20fc28 LP |
73 | int sockaddr_un_unlink(const struct sockaddr_un *sa); |
74 | ||
75 | static inline int socket_address_unlink(const SocketAddress *a) { | |
76 | return socket_address_family(a) == AF_UNIX ? sockaddr_un_unlink(&a->sockaddr.un) : 0; | |
77 | } | |
b5a0699f | 78 | |
44a6b1b6 | 79 | bool socket_address_can_accept(const SocketAddress *a) _pure_; |
4f2d528d | 80 | |
b5a0699f LP |
81 | int socket_address_listen( |
82 | const SocketAddress *a, | |
175a3d25 | 83 | int flags, |
b5a0699f LP |
84 | int backlog, |
85 | SocketAddressBindIPv6Only only, | |
86 | const char *bind_to_device, | |
54255c64 | 87 | bool reuse_port, |
4fd5948e | 88 | bool free_bind, |
6b6d2dee | 89 | bool transparent, |
b5a0699f LP |
90 | mode_t directory_mode, |
91 | mode_t socket_mode, | |
175a3d25 | 92 | const char *label); |
a16e1123 | 93 | |
5c3fa98d ZJS |
94 | int socket_address_verify(const SocketAddress *a, bool strict) _pure_; |
95 | int socket_address_print(const SocketAddress *a, char **p); | |
01e10de3 LP |
96 | bool socket_address_matches_fd(const SocketAddress *a, int fd); |
97 | ||
44a6b1b6 | 98 | bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_; |
a16e1123 | 99 | |
a57f7e2c | 100 | const char* socket_address_get_path(const SocketAddress *a); |
6e2ef85b | 101 | |
4d49b48c LP |
102 | bool socket_ipv6_is_supported(void); |
103 | ||
69dc6922 | 104 | int sockaddr_port(const struct sockaddr *_sa, unsigned *port); |
3b1c5241 SL |
105 | |
106 | int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret); | |
366b7db4 | 107 | int getpeername_pretty(int fd, bool include_port, char **ret); |
4d49b48c LP |
108 | int getsockname_pretty(int fd, char **ret); |
109 | ||
b31f535c | 110 | int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret); |
b31f535c | 111 | |
44a6b1b6 ZJS |
112 | const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_; |
113 | SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_; | |
b54e98ef | 114 | SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s); |
c0120d99 | 115 | |
f8b69d1d | 116 | int netlink_family_to_string_alloc(int b, char **s); |
4d49b48c | 117 | int netlink_family_from_string(const char *s) _pure_; |
f01e5736 LP |
118 | |
119 | bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b); | |
2583fbea LP |
120 | |
121 | int fd_inc_sndbuf(int fd, size_t n); | |
122 | int fd_inc_rcvbuf(int fd, size_t n); | |
123 | ||
124 | int ip_tos_to_string_alloc(int i, char **s); | |
125 | int ip_tos_from_string(const char *s); | |
126 | ||
4252696a YW |
127 | bool ifname_valid_full(const char *p, bool alternative); |
128 | static inline bool ifname_valid(const char *p) { | |
129 | return ifname_valid_full(p, false); | |
130 | } | |
26808948 | 131 | bool address_label_valid(const char *p); |
ef76dff2 | 132 | |
2583fbea LP |
133 | int getpeercred(int fd, struct ucred *ucred); |
134 | int getpeersec(int fd, char **ret); | |
43f2c88d | 135 | int getpeergroups(int fd, gid_t **ret); |
2583fbea | 136 | |
d34673ec FB |
137 | ssize_t send_one_fd_iov_sa( |
138 | int transport_fd, | |
139 | int fd, | |
140 | struct iovec *iov, size_t iovlen, | |
141 | const struct sockaddr *sa, socklen_t len, | |
142 | int flags); | |
726f4c47 ZJS |
143 | int send_one_fd_sa(int transport_fd, |
144 | int fd, | |
145 | const struct sockaddr *sa, socklen_t len, | |
146 | int flags); | |
d34673ec FB |
147 | #define send_one_fd_iov(transport_fd, fd, iov, iovlen, flags) send_one_fd_iov_sa(transport_fd, fd, iov, iovlen, NULL, 0, flags) |
148 | #define send_one_fd(transport_fd, fd, flags) send_one_fd_iov_sa(transport_fd, fd, NULL, 0, NULL, 0, flags) | |
149 | ssize_t receive_one_fd_iov(int transport_fd, struct iovec *iov, size_t iovlen, int flags, int *ret_fd); | |
2583fbea | 150 | int receive_one_fd(int transport_fd, int flags); |
8f328d36 | 151 | |
4edc2c9b LP |
152 | ssize_t next_datagram_size_fd(int fd); |
153 | ||
60d9771c LP |
154 | int flush_accept(int fd); |
155 | ||
8f328d36 LP |
156 | #define CMSG_FOREACH(cmsg, mh) \ |
157 | for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg))) | |
fc2fffe7 | 158 | |
29206d46 LP |
159 | struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length); |
160 | ||
b1f24b75 BG |
161 | /* |
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. | |
165 | */ | |
166 | #define SOCKADDR_LL_LEN(sa) \ | |
167 | ({ \ | |
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; \ | |
176 | }) | |
177 | ||
fc2fffe7 LP |
178 | /* Covers only file system and abstract AF_UNIX socket addresses, but not unnamed socket addresses. */ |
179 | #define SOCKADDR_UN_LEN(sa) \ | |
180 | ({ \ | |
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) : \ | |
69995bff | 186 | strnlen(_sa->sun_path, sizeof(_sa->sun_path))+1); \ |
fc2fffe7 | 187 | }) |
429b4350 LP |
188 | |
189 | int socket_ioctl_fd(void); | |
5cf91ea9 LP |
190 | |
191 | int sockaddr_un_set_path(struct sockaddr_un *ret, const char *path); | |
2ff48e98 LP |
192 | |
193 | static inline int setsockopt_int(int fd, int level, int optname, int value) { | |
194 | if (setsockopt(fd, level, optname, &value, sizeof(value)) < 0) | |
195 | return -errno; | |
196 | ||
197 | return 0; | |
198 | } | |
5d594d01 LP |
199 | |
200 | int socket_bind_to_ifname(int fd, const char *ifname); | |
201 | int socket_bind_to_ifindex(int fd, int ifindex); | |
47eae6ce LP |
202 | |
203 | ssize_t recvmsg_safe(int sockfd, struct msghdr *msg, int flags); |