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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
c2f1db8f | 2 | #pragma once |
42f4e3c4 | 3 | |
a7334b09 | 4 | /*** |
a7334b09 | 5 | Copyright 2010 Lennart Poettering |
a7334b09 LP |
6 | ***/ |
7 | ||
db73295a | 8 | #include <netinet/ether.h> |
71d35b6b | 9 | #include <netinet/in.h> |
11c3a366 TA |
10 | #include <stdbool.h> |
11 | #include <stddef.h> | |
71d35b6b | 12 | #include <sys/socket.h> |
11c3a366 | 13 | #include <sys/types.h> |
42f4e3c4 | 14 | #include <sys/un.h> |
7a22745a | 15 | #include <linux/netlink.h> |
b1f24b75 | 16 | #include <linux/if_infiniband.h> |
e88bc795 | 17 | #include <linux/if_packet.h> |
42f4e3c4 LP |
18 | |
19 | #include "macro.h" | |
0fc0f14b | 20 | #include "missing.h" |
42f4e3c4 LP |
21 | #include "util.h" |
22 | ||
f6144808 | 23 | union sockaddr_union { |
8b7f989a | 24 | /* The minimal, abstract version */ |
f6144808 | 25 | struct sockaddr sa; |
8b7f989a LP |
26 | |
27 | /* The libc provided version that allocates "enough room" for every protocol */ | |
28 | struct sockaddr_storage storage; | |
29 | ||
30 | /* Protoctol-specific implementations */ | |
4d49b48c | 31 | struct sockaddr_in in; |
f6144808 LP |
32 | struct sockaddr_in6 in6; |
33 | struct sockaddr_un un; | |
7a22745a | 34 | struct sockaddr_nl nl; |
e88bc795 | 35 | struct sockaddr_ll ll; |
0fc0f14b | 36 | struct sockaddr_vm vm; |
8b7f989a | 37 | |
b1f24b75 BG |
38 | /* Ensure there is enough space to store Infiniband addresses */ |
39 | uint8_t ll_buffer[offsetof(struct sockaddr_ll, sll_addr) + CONST_MAX(ETH_ALEN, INFINIBAND_ALEN)]; | |
8b7f989a LP |
40 | |
41 | /* Ensure there is enough space after the AF_UNIX sun_path for one more NUL byte, just to be sure that the path | |
42 | * component is always followed by at least one NUL byte. */ | |
43 | uint8_t un_buffer[sizeof(struct sockaddr_un) + 1]; | |
f6144808 LP |
44 | }; |
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 | ||
542563ba | 73 | int socket_address_parse(SocketAddress *a, const char *s); |
7693146d | 74 | int socket_address_parse_and_warn(SocketAddress *a, const char *s); |
7a22745a | 75 | int socket_address_parse_netlink(SocketAddress *a, const char *s); |
542563ba | 76 | int socket_address_print(const SocketAddress *a, char **p); |
44a6b1b6 | 77 | int socket_address_verify(const SocketAddress *a) _pure_; |
bd1fe7c7 | 78 | int socket_address_unlink(SocketAddress *a); |
b5a0699f | 79 | |
44a6b1b6 | 80 | bool socket_address_can_accept(const SocketAddress *a) _pure_; |
4f2d528d | 81 | |
b5a0699f LP |
82 | int socket_address_listen( |
83 | const SocketAddress *a, | |
175a3d25 | 84 | int flags, |
b5a0699f LP |
85 | int backlog, |
86 | SocketAddressBindIPv6Only only, | |
87 | const char *bind_to_device, | |
54255c64 | 88 | bool reuse_port, |
4fd5948e | 89 | bool free_bind, |
6b6d2dee | 90 | bool transparent, |
b5a0699f LP |
91 | mode_t directory_mode, |
92 | mode_t socket_mode, | |
175a3d25 | 93 | const char *label); |
7b7afdfc | 94 | int make_socket_fd(int log_level, const char* address, int type, int flags); |
42f4e3c4 | 95 | |
27ca8d7a | 96 | bool socket_address_is(const SocketAddress *a, const char *s, int type); |
7a22745a | 97 | bool socket_address_is_netlink(const SocketAddress *a, const char *s); |
a16e1123 | 98 | |
01e10de3 LP |
99 | bool socket_address_matches_fd(const SocketAddress *a, int fd); |
100 | ||
44a6b1b6 | 101 | bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_; |
a16e1123 | 102 | |
a57f7e2c | 103 | const char* socket_address_get_path(const SocketAddress *a); |
6e2ef85b | 104 | |
4d49b48c LP |
105 | bool socket_ipv6_is_supported(void); |
106 | ||
69dc6922 | 107 | int sockaddr_port(const struct sockaddr *_sa, unsigned *port); |
3b1c5241 SL |
108 | |
109 | int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret); | |
366b7db4 | 110 | int getpeername_pretty(int fd, bool include_port, char **ret); |
4d49b48c LP |
111 | int getsockname_pretty(int fd, char **ret); |
112 | ||
b31f535c | 113 | int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret); |
b31f535c | 114 | |
44a6b1b6 ZJS |
115 | const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_; |
116 | SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_; | |
b54e98ef | 117 | SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s); |
c0120d99 | 118 | |
f8b69d1d | 119 | int netlink_family_to_string_alloc(int b, char **s); |
4d49b48c | 120 | int netlink_family_from_string(const char *s) _pure_; |
f01e5736 LP |
121 | |
122 | bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b); | |
2583fbea LP |
123 | |
124 | int fd_inc_sndbuf(int fd, size_t n); | |
125 | int fd_inc_rcvbuf(int fd, size_t n); | |
126 | ||
127 | int ip_tos_to_string_alloc(int i, char **s); | |
128 | int ip_tos_from_string(const char *s); | |
129 | ||
ef76dff2 | 130 | bool ifname_valid(const char *p); |
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 | |
726f4c47 ZJS |
137 | int send_one_fd_sa(int transport_fd, |
138 | int fd, | |
139 | const struct sockaddr *sa, socklen_t len, | |
140 | int flags); | |
141 | #define send_one_fd(transport_fd, fd, flags) send_one_fd_sa(transport_fd, fd, NULL, 0, flags) | |
2583fbea | 142 | int receive_one_fd(int transport_fd, int flags); |
8f328d36 | 143 | |
4edc2c9b LP |
144 | ssize_t next_datagram_size_fd(int fd); |
145 | ||
60d9771c LP |
146 | int flush_accept(int fd); |
147 | ||
8f328d36 LP |
148 | #define CMSG_FOREACH(cmsg, mh) \ |
149 | for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg))) | |
fc2fffe7 | 150 | |
29206d46 LP |
151 | struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length); |
152 | ||
b1f24b75 BG |
153 | /* |
154 | * Certain hardware address types (e.g Infiniband) do not fit into sll_addr | |
155 | * (8 bytes) and run over the structure. This macro returns the correct size that | |
156 | * must be passed to kernel. | |
157 | */ | |
158 | #define SOCKADDR_LL_LEN(sa) \ | |
159 | ({ \ | |
160 | const struct sockaddr_ll *_sa = &(sa); \ | |
161 | size_t _mac_len = sizeof(_sa->sll_addr); \ | |
162 | assert(_sa->sll_family == AF_PACKET); \ | |
163 | if (be16toh(_sa->sll_hatype) == ARPHRD_ETHER) \ | |
164 | _mac_len = MAX(_mac_len, (size_t) ETH_ALEN); \ | |
165 | if (be16toh(_sa->sll_hatype) == ARPHRD_INFINIBAND) \ | |
166 | _mac_len = MAX(_mac_len, (size_t) INFINIBAND_ALEN); \ | |
167 | offsetof(struct sockaddr_ll, sll_addr) + _mac_len; \ | |
168 | }) | |
169 | ||
fc2fffe7 LP |
170 | /* Covers only file system and abstract AF_UNIX socket addresses, but not unnamed socket addresses. */ |
171 | #define SOCKADDR_UN_LEN(sa) \ | |
172 | ({ \ | |
173 | const struct sockaddr_un *_sa = &(sa); \ | |
174 | assert(_sa->sun_family == AF_UNIX); \ | |
175 | offsetof(struct sockaddr_un, sun_path) + \ | |
176 | (_sa->sun_path[0] == 0 ? \ | |
177 | 1 + strnlen(_sa->sun_path+1, sizeof(_sa->sun_path)-1) : \ | |
178 | strnlen(_sa->sun_path, sizeof(_sa->sun_path))); \ | |
179 | }) | |
429b4350 LP |
180 | |
181 | int socket_ioctl_fd(void); |