systemd: move basic systemd library to shared/nm-utils
For better or worse, we already pull in large parts of systemd sources. I need a base64 decode implementation (because glib's g_base64_decode() cannot reject invalid encodings). Instead of coming up with my own or copy-paste if from somewhere, reuse systemd's unbase64mem(). But for that, make systemd's basic bits an independent static library first because I will need it in libnm-core. This doesn't really change anything except making "libnm-systemd-core.la" an indpendent static library that could be used from "libnm-core". We shall still be mindful about which internal code of systemd we use, and only access functionality that is exposed via "systemd/nm-sd-utils-shared.h".
This commit is contained in:
Thomas Haller
202
shared/systemd/src/basic/socket-util.h
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202
shared/systemd/src/basic/socket-util.h
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/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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#include <inttypes.h>
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#include <linux/netlink.h>
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#include <linux/if_infiniband.h>
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#include <linux/if_packet.h>
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#include <netinet/ether.h>
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#include <netinet/in.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/un.h>
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#include "macro.h"
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#include "missing_socket.h"
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#include "sparse-endian.h"
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union sockaddr_union {
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/* The minimal, abstract version */
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struct sockaddr sa;
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/* The libc provided version that allocates "enough room" for every protocol */
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struct sockaddr_storage storage;
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/* Protoctol-specific implementations */
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struct sockaddr_in in;
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struct sockaddr_in6 in6;
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struct sockaddr_un un;
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struct sockaddr_nl nl;
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struct sockaddr_ll ll;
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#if 0 /* NM_IGNORED */
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struct sockaddr_vm vm;
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#endif /* NM_IGNORED */
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/* Ensure there is enough space to store Infiniband addresses */
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uint8_t ll_buffer[offsetof(struct sockaddr_ll, sll_addr) + CONST_MAX(ETH_ALEN, INFINIBAND_ALEN)];
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/* Ensure there is enough space after the AF_UNIX sun_path for one more NUL byte, just to be sure that the path
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* component is always followed by at least one NUL byte. */
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uint8_t un_buffer[sizeof(struct sockaddr_un) + 1];
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};
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typedef struct SocketAddress {
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union sockaddr_union sockaddr;
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/* We store the size here explicitly due to the weird
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* sockaddr_un semantics for abstract sockets */
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socklen_t size;
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/* Socket type, i.e. SOCK_STREAM, SOCK_DGRAM, ... */
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int type;
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/* Socket protocol, IPPROTO_xxx, usually 0, except for netlink */
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int protocol;
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} SocketAddress;
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typedef enum SocketAddressBindIPv6Only {
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SOCKET_ADDRESS_DEFAULT,
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SOCKET_ADDRESS_BOTH,
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SOCKET_ADDRESS_IPV6_ONLY,
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_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX,
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_SOCKET_ADDRESS_BIND_IPV6_ONLY_INVALID = -1
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} SocketAddressBindIPv6Only;
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#define socket_address_family(a) ((a)->sockaddr.sa.sa_family)
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const char* socket_address_type_to_string(int t) _const_;
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int socket_address_type_from_string(const char *s) _pure_;
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int socket_address_parse(SocketAddress *a, const char *s);
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int socket_address_parse_and_warn(SocketAddress *a, const char *s);
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int socket_address_parse_netlink(SocketAddress *a, const char *s);
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int socket_address_print(const SocketAddress *a, char **p);
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int socket_address_verify(const SocketAddress *a, bool strict) _pure_;
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int sockaddr_un_unlink(const struct sockaddr_un *sa);
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static inline int socket_address_unlink(const SocketAddress *a) {
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return socket_address_family(a) == AF_UNIX ? sockaddr_un_unlink(&a->sockaddr.un) : 0;
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}
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bool socket_address_can_accept(const SocketAddress *a) _pure_;
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int socket_address_listen(
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const SocketAddress *a,
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int flags,
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int backlog,
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SocketAddressBindIPv6Only only,
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const char *bind_to_device,
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bool reuse_port,
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bool free_bind,
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bool transparent,
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mode_t directory_mode,
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mode_t socket_mode,
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const char *label);
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int make_socket_fd(int log_level, const char* address, int type, int flags);
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bool socket_address_is(const SocketAddress *a, const char *s, int type);
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bool socket_address_is_netlink(const SocketAddress *a, const char *s);
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bool socket_address_matches_fd(const SocketAddress *a, int fd);
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bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_;
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const char* socket_address_get_path(const SocketAddress *a);
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bool socket_ipv6_is_supported(void);
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int sockaddr_port(const struct sockaddr *_sa, unsigned *port);
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int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret);
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int getpeername_pretty(int fd, bool include_port, char **ret);
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int getsockname_pretty(int fd, char **ret);
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int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret);
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const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_;
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SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_;
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SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s);
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int netlink_family_to_string_alloc(int b, char **s);
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int netlink_family_from_string(const char *s) _pure_;
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bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b);
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int fd_inc_sndbuf(int fd, size_t n);
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int fd_inc_rcvbuf(int fd, size_t n);
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int ip_tos_to_string_alloc(int i, char **s);
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int ip_tos_from_string(const char *s);
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bool ifname_valid(const char *p);
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bool address_label_valid(const char *p);
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int getpeercred(int fd, struct ucred *ucred);
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int getpeersec(int fd, char **ret);
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int getpeergroups(int fd, gid_t **ret);
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ssize_t send_one_fd_iov_sa(
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int transport_fd,
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int fd,
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struct iovec *iov, size_t iovlen,
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const struct sockaddr *sa, socklen_t len,
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int flags);
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int send_one_fd_sa(int transport_fd,
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int fd,
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const struct sockaddr *sa, socklen_t len,
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int flags);
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#define send_one_fd_iov(transport_fd, fd, iov, iovlen, flags) send_one_fd_iov_sa(transport_fd, fd, iov, iovlen, NULL, 0, flags)
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#define send_one_fd(transport_fd, fd, flags) send_one_fd_iov_sa(transport_fd, fd, NULL, 0, NULL, 0, flags)
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ssize_t receive_one_fd_iov(int transport_fd, struct iovec *iov, size_t iovlen, int flags, int *ret_fd);
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int receive_one_fd(int transport_fd, int flags);
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ssize_t next_datagram_size_fd(int fd);
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int flush_accept(int fd);
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#define CMSG_FOREACH(cmsg, mh) \
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for ((cmsg) = CMSG_FIRSTHDR(mh); (cmsg); (cmsg) = CMSG_NXTHDR((mh), (cmsg)))
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struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length);
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/*
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* Certain hardware address types (e.g Infiniband) do not fit into sll_addr
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* (8 bytes) and run over the structure. This macro returns the correct size that
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* must be passed to kernel.
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*/
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#define SOCKADDR_LL_LEN(sa) \
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({ \
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const struct sockaddr_ll *_sa = &(sa); \
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size_t _mac_len = sizeof(_sa->sll_addr); \
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assert(_sa->sll_family == AF_PACKET); \
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if (be16toh(_sa->sll_hatype) == ARPHRD_ETHER) \
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_mac_len = MAX(_mac_len, (size_t) ETH_ALEN); \
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if (be16toh(_sa->sll_hatype) == ARPHRD_INFINIBAND) \
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_mac_len = MAX(_mac_len, (size_t) INFINIBAND_ALEN); \
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offsetof(struct sockaddr_ll, sll_addr) + _mac_len; \
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})
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/* Covers only file system and abstract AF_UNIX socket addresses, but not unnamed socket addresses. */
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#define SOCKADDR_UN_LEN(sa) \
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({ \
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const struct sockaddr_un *_sa = &(sa); \
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assert(_sa->sun_family == AF_UNIX); \
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offsetof(struct sockaddr_un, sun_path) + \
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(_sa->sun_path[0] == 0 ? \
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1 + strnlen(_sa->sun_path+1, sizeof(_sa->sun_path)-1) : \
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strnlen(_sa->sun_path, sizeof(_sa->sun_path))+1); \
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})
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int socket_ioctl_fd(void);
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int sockaddr_un_set_path(struct sockaddr_un *ret, const char *path);
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static inline int setsockopt_int(int fd, int level, int optname, int value) {
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if (setsockopt(fd, level, optname, &value, sizeof(value)) < 0)
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return -errno;
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return 0;
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}
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