/* SPDX-License-Identifier: LGPL-2.1+ */ #pragma once #include #include #include #include #include #include #include #include #include #include #include "macro.h" #include "missing.h" #include "util.h" union sockaddr_union { /* The minimal, abstract version */ struct sockaddr sa; /* The libc provided version that allocates "enough room" for every protocol */ struct sockaddr_storage storage; /* Protoctol-specific implementations */ struct sockaddr_in in; struct sockaddr_in6 in6; struct sockaddr_un un; #if 0 /// UNNEEDED by elogind. struct sockaddr_nl nl; struct sockaddr_ll ll; #endif // 0 struct sockaddr_vm vm; /* Ensure there is enough space to store Infiniband addresses */ uint8_t ll_buffer[offsetof(struct sockaddr_ll, sll_addr) + CONST_MAX(ETH_ALEN, INFINIBAND_ALEN)]; /* Ensure there is enough space after the AF_UNIX sun_path for one more NUL byte, just to be sure that the path * component is always followed by at least one NUL byte. */ uint8_t un_buffer[sizeof(struct sockaddr_un) + 1]; }; #if 0 /// UNNEEDED by elogind typedef struct SocketAddress { union sockaddr_union sockaddr; /* We store the size here explicitly due to the weird * sockaddr_un semantics for abstract sockets */ socklen_t size; /* Socket type, i.e. SOCK_STREAM, SOCK_DGRAM, ... */ int type; /* Socket protocol, IPPROTO_xxx, usually 0, except for netlink */ int protocol; } SocketAddress; typedef enum SocketAddressBindIPv6Only { SOCKET_ADDRESS_DEFAULT, SOCKET_ADDRESS_BOTH, SOCKET_ADDRESS_IPV6_ONLY, _SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX, _SOCKET_ADDRESS_BIND_IPV6_ONLY_INVALID = -1 } SocketAddressBindIPv6Only; #define socket_address_family(a) ((a)->sockaddr.sa.sa_family) const char* socket_address_type_to_string(int t) _const_; int socket_address_type_from_string(const char *s) _pure_; int socket_address_parse(SocketAddress *a, const char *s); int socket_address_parse_and_warn(SocketAddress *a, const char *s); int socket_address_parse_netlink(SocketAddress *a, const char *s); int socket_address_print(const SocketAddress *a, char **p); int socket_address_verify(const SocketAddress *a) _pure_; int socket_address_unlink(SocketAddress *a); bool socket_address_can_accept(const SocketAddress *a) _pure_; int socket_address_listen( const SocketAddress *a, int flags, int backlog, SocketAddressBindIPv6Only only, const char *bind_to_device, bool reuse_port, bool free_bind, bool transparent, mode_t directory_mode, mode_t socket_mode, const char *label); int make_socket_fd(int log_level, const char* address, int type, int flags); bool socket_address_is(const SocketAddress *a, const char *s, int type); bool socket_address_is_netlink(const SocketAddress *a, const char *s); bool socket_address_matches_fd(const SocketAddress *a, int fd); bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_; const char* socket_address_get_path(const SocketAddress *a); bool socket_ipv6_is_supported(void); #endif // 0 int sockaddr_port(const struct sockaddr *_sa, unsigned *port); #if 0 /// UNNEEDED by elogind int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret); int getpeername_pretty(int fd, bool include_port, char **ret); int getsockname_pretty(int fd, char **ret); int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret); const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_; SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_; SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s); int netlink_family_to_string_alloc(int b, char **s); int netlink_family_from_string(const char *s) _pure_; bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b); #endif // 0 int fd_inc_sndbuf(int fd, size_t n); int fd_inc_rcvbuf(int fd, size_t n); #if 0 /// UNNEEDED by elogind int ip_tos_to_string_alloc(int i, char **s); int ip_tos_from_string(const char *s); bool ifname_valid(const char *p); bool address_label_valid(const char *p); #endif // 0 int getpeercred(int fd, struct ucred *ucred); int getpeersec(int fd, char **ret); int getpeergroups(int fd, gid_t **ret); int send_one_fd_sa(int transport_fd, int fd, const struct sockaddr *sa, socklen_t len, int flags); #define send_one_fd(transport_fd, fd, flags) send_one_fd_sa(transport_fd, fd, NULL, 0, flags) #if 0 /// UNNEEDED by elogind int receive_one_fd(int transport_fd, int flags); ssize_t next_datagram_size_fd(int fd); int flush_accept(int fd); #endif // 0 #define CMSG_FOREACH(cmsg, mh) \ for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg))) #if 0 /// UNNEEDED by elogind struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length); #endif // 0 /* * Certain hardware address types (e.g Infiniband) do not fit into sll_addr * (8 bytes) and run over the structure. This macro returns the correct size that * must be passed to kernel. */ #define SOCKADDR_LL_LEN(sa) \ ({ \ const struct sockaddr_ll *_sa = &(sa); \ size_t _mac_len = sizeof(_sa->sll_addr); \ assert(_sa->sll_family == AF_PACKET); \ if (be16toh(_sa->sll_hatype) == ARPHRD_ETHER) \ _mac_len = MAX(_mac_len, (size_t) ETH_ALEN); \ if (be16toh(_sa->sll_hatype) == ARPHRD_INFINIBAND) \ _mac_len = MAX(_mac_len, (size_t) INFINIBAND_ALEN); \ offsetof(struct sockaddr_ll, sll_addr) + _mac_len; \ }) /* Covers only file system and abstract AF_UNIX socket addresses, but not unnamed socket addresses. */ #define SOCKADDR_UN_LEN(sa) \ ({ \ const struct sockaddr_un *_sa = &(sa); \ assert(_sa->sun_family == AF_UNIX); \ offsetof(struct sockaddr_un, sun_path) + \ (_sa->sun_path[0] == 0 ? \ 1 + strnlen(_sa->sun_path+1, sizeof(_sa->sun_path)-1) : \ strnlen(_sa->sun_path, sizeof(_sa->sun_path))); \ }) #if 0 /// UNNEEDED by elogind int socket_ioctl_fd(void); #endif // 0