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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
c2f1db8f | 2 | #pragma once |
42f4e3c4 | 3 | |
a7334b09 LP |
4 | /*** |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright 2010 Lennart Poettering | |
a7334b09 LP |
8 | ***/ |
9 | ||
db73295a | 10 | #include <netinet/ether.h> |
71d35b6b | 11 | #include <netinet/in.h> |
11c3a366 TA |
12 | #include <stdbool.h> |
13 | #include <stddef.h> | |
71d35b6b | 14 | #include <sys/socket.h> |
11c3a366 | 15 | #include <sys/types.h> |
42f4e3c4 | 16 | #include <sys/un.h> |
7a22745a | 17 | #include <linux/netlink.h> |
b1f24b75 | 18 | #include <linux/if_infiniband.h> |
e88bc795 | 19 | #include <linux/if_packet.h> |
42f4e3c4 LP |
20 | |
21 | #include "macro.h" | |
0fc0f14b | 22 | #include "missing.h" |
42f4e3c4 LP |
23 | #include "util.h" |
24 | ||
f6144808 | 25 | union sockaddr_union { |
8b7f989a | 26 | /* The minimal, abstract version */ |
f6144808 | 27 | struct sockaddr sa; |
8b7f989a LP |
28 | |
29 | /* The libc provided version that allocates "enough room" for every protocol */ | |
30 | struct sockaddr_storage storage; | |
31 | ||
32 | /* Protoctol-specific implementations */ | |
4d49b48c | 33 | struct sockaddr_in in; |
f6144808 LP |
34 | struct sockaddr_in6 in6; |
35 | struct sockaddr_un un; | |
7a22745a | 36 | struct sockaddr_nl nl; |
e88bc795 | 37 | struct sockaddr_ll ll; |
0fc0f14b | 38 | struct sockaddr_vm vm; |
8b7f989a | 39 | |
b1f24b75 BG |
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)]; | |
8b7f989a LP |
42 | |
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]; | |
f6144808 LP |
46 | }; |
47 | ||
542563ba | 48 | typedef struct SocketAddress { |
f6144808 | 49 | union sockaddr_union sockaddr; |
42f4e3c4 LP |
50 | |
51 | /* We store the size here explicitly due to the weird | |
52 | * sockaddr_un semantics for abstract sockets */ | |
53 | socklen_t size; | |
54 | ||
55 | /* Socket type, i.e. SOCK_STREAM, SOCK_DGRAM, ... */ | |
56 | int type; | |
7a22745a LP |
57 | |
58 | /* Socket protocol, IPPROTO_xxx, usually 0, except for netlink */ | |
59 | int protocol; | |
542563ba | 60 | } SocketAddress; |
42f4e3c4 | 61 | |
542563ba LP |
62 | typedef enum SocketAddressBindIPv6Only { |
63 | SOCKET_ADDRESS_DEFAULT, | |
64 | SOCKET_ADDRESS_BOTH, | |
c0120d99 LP |
65 | SOCKET_ADDRESS_IPV6_ONLY, |
66 | _SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX, | |
67 | _SOCKET_ADDRESS_BIND_IPV6_ONLY_INVALID = -1 | |
542563ba | 68 | } SocketAddressBindIPv6Only; |
42f4e3c4 | 69 | |
542563ba | 70 | #define socket_address_family(a) ((a)->sockaddr.sa.sa_family) |
42f4e3c4 | 71 | |
398ce0bc YW |
72 | const char* socket_address_type_to_string(int t) _const_; |
73 | int socket_address_type_from_string(const char *s) _pure_; | |
74 | ||
542563ba | 75 | int socket_address_parse(SocketAddress *a, const char *s); |
7693146d | 76 | int socket_address_parse_and_warn(SocketAddress *a, const char *s); |
7a22745a | 77 | int socket_address_parse_netlink(SocketAddress *a, const char *s); |
542563ba | 78 | int socket_address_print(const SocketAddress *a, char **p); |
44a6b1b6 | 79 | int socket_address_verify(const SocketAddress *a) _pure_; |
bd1fe7c7 | 80 | int socket_address_unlink(SocketAddress *a); |
b5a0699f | 81 | |
44a6b1b6 | 82 | bool socket_address_can_accept(const SocketAddress *a) _pure_; |
4f2d528d | 83 | |
b5a0699f LP |
84 | int socket_address_listen( |
85 | const SocketAddress *a, | |
175a3d25 | 86 | int flags, |
b5a0699f LP |
87 | int backlog, |
88 | SocketAddressBindIPv6Only only, | |
89 | const char *bind_to_device, | |
54255c64 | 90 | bool reuse_port, |
4fd5948e | 91 | bool free_bind, |
6b6d2dee | 92 | bool transparent, |
b5a0699f LP |
93 | mode_t directory_mode, |
94 | mode_t socket_mode, | |
175a3d25 | 95 | const char *label); |
7b7afdfc | 96 | int make_socket_fd(int log_level, const char* address, int type, int flags); |
42f4e3c4 | 97 | |
27ca8d7a | 98 | bool socket_address_is(const SocketAddress *a, const char *s, int type); |
7a22745a | 99 | bool socket_address_is_netlink(const SocketAddress *a, const char *s); |
a16e1123 | 100 | |
01e10de3 LP |
101 | bool socket_address_matches_fd(const SocketAddress *a, int fd); |
102 | ||
44a6b1b6 | 103 | bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_; |
a16e1123 | 104 | |
a57f7e2c | 105 | const char* socket_address_get_path(const SocketAddress *a); |
6e2ef85b | 106 | |
4d49b48c LP |
107 | bool socket_ipv6_is_supported(void); |
108 | ||
69dc6922 | 109 | int sockaddr_port(const struct sockaddr *_sa, unsigned *port); |
3b1c5241 SL |
110 | |
111 | int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret); | |
366b7db4 | 112 | int getpeername_pretty(int fd, bool include_port, char **ret); |
4d49b48c LP |
113 | int getsockname_pretty(int fd, char **ret); |
114 | ||
b31f535c | 115 | int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret); |
b31f535c | 116 | |
44a6b1b6 ZJS |
117 | const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_; |
118 | SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_; | |
6f90844f | 119 | SocketAddressBindIPv6Only parse_socket_address_bind_ipv6_only_or_bool(const char *s); |
c0120d99 | 120 | |
f8b69d1d | 121 | int netlink_family_to_string_alloc(int b, char **s); |
4d49b48c | 122 | int netlink_family_from_string(const char *s) _pure_; |
f01e5736 LP |
123 | |
124 | bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b); | |
2583fbea LP |
125 | |
126 | int fd_inc_sndbuf(int fd, size_t n); | |
127 | int fd_inc_rcvbuf(int fd, size_t n); | |
128 | ||
129 | int ip_tos_to_string_alloc(int i, char **s); | |
130 | int ip_tos_from_string(const char *s); | |
131 | ||
ef76dff2 | 132 | bool ifname_valid(const char *p); |
26808948 | 133 | bool address_label_valid(const char *p); |
ef76dff2 | 134 | |
2583fbea LP |
135 | int getpeercred(int fd, struct ucred *ucred); |
136 | int getpeersec(int fd, char **ret); | |
43f2c88d | 137 | int getpeergroups(int fd, gid_t **ret); |
2583fbea | 138 | |
726f4c47 ZJS |
139 | int send_one_fd_sa(int transport_fd, |
140 | int fd, | |
141 | const struct sockaddr *sa, socklen_t len, | |
142 | int flags); | |
143 | #define send_one_fd(transport_fd, fd, flags) send_one_fd_sa(transport_fd, fd, NULL, 0, flags) | |
2583fbea | 144 | int receive_one_fd(int transport_fd, int flags); |
8f328d36 | 145 | |
4edc2c9b LP |
146 | ssize_t next_datagram_size_fd(int fd); |
147 | ||
60d9771c LP |
148 | int flush_accept(int fd); |
149 | ||
8f328d36 LP |
150 | #define CMSG_FOREACH(cmsg, mh) \ |
151 | for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg))) | |
fc2fffe7 | 152 | |
29206d46 LP |
153 | struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length); |
154 | ||
b1f24b75 BG |
155 | /* |
156 | * Certain hardware address types (e.g Infiniband) do not fit into sll_addr | |
157 | * (8 bytes) and run over the structure. This macro returns the correct size that | |
158 | * must be passed to kernel. | |
159 | */ | |
160 | #define SOCKADDR_LL_LEN(sa) \ | |
161 | ({ \ | |
162 | const struct sockaddr_ll *_sa = &(sa); \ | |
163 | size_t _mac_len = sizeof(_sa->sll_addr); \ | |
164 | assert(_sa->sll_family == AF_PACKET); \ | |
165 | if (be16toh(_sa->sll_hatype) == ARPHRD_ETHER) \ | |
166 | _mac_len = MAX(_mac_len, (size_t) ETH_ALEN); \ | |
167 | if (be16toh(_sa->sll_hatype) == ARPHRD_INFINIBAND) \ | |
168 | _mac_len = MAX(_mac_len, (size_t) INFINIBAND_ALEN); \ | |
169 | offsetof(struct sockaddr_ll, sll_addr) + _mac_len; \ | |
170 | }) | |
171 | ||
fc2fffe7 LP |
172 | /* Covers only file system and abstract AF_UNIX socket addresses, but not unnamed socket addresses. */ |
173 | #define SOCKADDR_UN_LEN(sa) \ | |
174 | ({ \ | |
175 | const struct sockaddr_un *_sa = &(sa); \ | |
176 | assert(_sa->sun_family == AF_UNIX); \ | |
177 | offsetof(struct sockaddr_un, sun_path) + \ | |
178 | (_sa->sun_path[0] == 0 ? \ | |
179 | 1 + strnlen(_sa->sun_path+1, sizeof(_sa->sun_path)-1) : \ | |
180 | strnlen(_sa->sun_path, sizeof(_sa->sun_path))); \ | |
181 | }) | |
429b4350 LP |
182 | |
183 | int socket_ioctl_fd(void); |