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Diffstat (limited to 'src/libbasic/include/basic/socket-util.h')
| -rw-r--r-- | src/libbasic/include/basic/socket-util.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/libbasic/include/basic/socket-util.h b/src/libbasic/include/basic/socket-util.h new file mode 100644 index 0000000000..e9230e4a9f --- /dev/null +++ b/src/libbasic/include/basic/socket-util.h @@ -0,0 +1,154 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <netinet/ether.h> +#include <netinet/in.h> +#include <stdbool.h> +#include <stddef.h> +#include <sys/socket.h> +#include <sys/types.h> +#include <sys/un.h> +#include <linux/netlink.h> +#include <linux/if_packet.h> + +#include "macro.h" +#include "util.h" + +union sockaddr_union { + struct sockaddr sa; + struct sockaddr_in in; + struct sockaddr_in6 in6; + struct sockaddr_un un; + struct sockaddr_nl nl; + struct sockaddr_storage storage; + struct sockaddr_ll ll; +}; + +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) + +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); + +int sockaddr_port(const struct sockaddr *_sa) _pure_; + +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); +int getnameinfo_pretty(int fd, 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_; + +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); + +int fd_inc_sndbuf(int fd, size_t n); +int fd_inc_rcvbuf(int fd, size_t n); + +int ip_tos_to_string_alloc(int i, char **s); +int ip_tos_from_string(const char *s); + +bool ifname_valid(const char *p); + +int getpeercred(int fd, struct ucred *ucred); +int getpeersec(int fd, char **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) +int receive_one_fd(int transport_fd, int flags); + +ssize_t next_datagram_size_fd(int fd); + +int flush_accept(int fd); + +#define CMSG_FOREACH(cmsg, mh) \ + for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg))) + +/* 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))); \ + }) |