diff options
Diffstat (limited to 'src/core/dbus-socket.c')
| -rw-r--r-- | src/core/dbus-socket.c | 468 |
1 files changed, 468 insertions, 0 deletions
diff --git a/src/core/dbus-socket.c b/src/core/dbus-socket.c new file mode 100644 index 0000000..83ac7ad --- /dev/null +++ b/src/core/dbus-socket.c @@ -0,0 +1,468 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include "alloc-util.h" +#include "bus-util.h" +#include "dbus-cgroup.h" +#include "dbus-execute.h" +#include "dbus-kill.h" +#include "dbus-socket.h" +#include "dbus-util.h" +#include "fd-util.h" +#include "ip-protocol-list.h" +#include "parse-util.h" +#include "path-util.h" +#include "socket.h" +#include "socket-util.h" +#include "string-util.h" +#include "unit.h" + +static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, socket_result, SocketResult); +static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_bind_ipv6_only, socket_address_bind_ipv6_only, SocketAddressBindIPv6Only); +static BUS_DEFINE_PROPERTY_GET(property_get_fdname, "s", Socket, socket_fdname); + +static int property_get_listen( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Socket *s = SOCKET(userdata); + SocketPort *p; + int r; + + assert(bus); + assert(reply); + assert(s); + + r = sd_bus_message_open_container(reply, 'a', "(ss)"); + if (r < 0) + return r; + + LIST_FOREACH(port, p, s->ports) { + _cleanup_free_ char *address = NULL; + const char *a; + + switch (p->type) { + case SOCKET_SOCKET: { + r = socket_address_print(&p->address, &address); + if (r) + return r; + + a = address; + break; + } + + case SOCKET_SPECIAL: + case SOCKET_MQUEUE: + case SOCKET_FIFO: + case SOCKET_USB_FUNCTION: + a = p->path; + break; + + default: + assert_not_reached("Unknown socket type"); + } + + r = sd_bus_message_append(reply, "(ss)", socket_port_type_to_string(p), a); + if (r < 0) + return r; + } + + return sd_bus_message_close_container(reply); +} + +const sd_bus_vtable bus_socket_vtable[] = { + SD_BUS_VTABLE_START(0), + SD_BUS_PROPERTY("BindIPv6Only", "s", property_get_bind_ipv6_only, offsetof(Socket, bind_ipv6_only), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Backlog", "u", bus_property_get_unsigned, offsetof(Socket, backlog), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("TimeoutUSec", "t", bus_property_get_usec, offsetof(Socket, timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("BindToDevice", "s", NULL, offsetof(Socket, bind_to_device), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("SocketUser", "s", NULL, offsetof(Socket, user), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("SocketGroup", "s", NULL, offsetof(Socket, group), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("SocketMode", "u", bus_property_get_mode, offsetof(Socket, socket_mode), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("DirectoryMode", "u", bus_property_get_mode, offsetof(Socket, directory_mode), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Accept", "b", bus_property_get_bool, offsetof(Socket, accept), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Writable", "b", bus_property_get_bool, offsetof(Socket, writable), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("KeepAlive", "b", bus_property_get_bool, offsetof(Socket, keep_alive), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("KeepAliveTimeUSec", "t", bus_property_get_usec, offsetof(Socket, keep_alive_time), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("KeepAliveIntervalUSec", "t", bus_property_get_usec, offsetof(Socket, keep_alive_interval), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("KeepAliveProbes", "u", bus_property_get_unsigned, offsetof(Socket, keep_alive_cnt), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("DeferAcceptUSec" , "t", bus_property_get_usec, offsetof(Socket, defer_accept), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("NoDelay", "b", bus_property_get_bool, offsetof(Socket, no_delay), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Priority", "i", bus_property_get_int, offsetof(Socket, priority), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("ReceiveBuffer", "t", bus_property_get_size, offsetof(Socket, receive_buffer), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("SendBuffer", "t", bus_property_get_size, offsetof(Socket, send_buffer), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("IPTOS", "i", bus_property_get_int, offsetof(Socket, ip_tos), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("IPTTL", "i", bus_property_get_int, offsetof(Socket, ip_ttl), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("PipeSize", "t", bus_property_get_size, offsetof(Socket, pipe_size), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("FreeBind", "b", bus_property_get_bool, offsetof(Socket, free_bind), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Transparent", "b", bus_property_get_bool, offsetof(Socket, transparent), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Broadcast", "b", bus_property_get_bool, offsetof(Socket, broadcast), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("PassCredentials", "b", bus_property_get_bool, offsetof(Socket, pass_cred), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("PassSecurity", "b", bus_property_get_bool, offsetof(Socket, pass_sec), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("RemoveOnStop", "b", bus_property_get_bool, offsetof(Socket, remove_on_stop), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Listen", "a(ss)", property_get_listen, 0, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Symlinks", "as", NULL, offsetof(Socket, symlinks), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Mark", "i", bus_property_get_int, offsetof(Socket, mark), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("MaxConnections", "u", bus_property_get_unsigned, offsetof(Socket, max_connections), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("MaxConnectionsPerSource", "u", bus_property_get_unsigned, offsetof(Socket, max_connections_per_source), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("MessageQueueMaxMessages", "x", bus_property_get_long, offsetof(Socket, mq_maxmsg), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("MessageQueueMessageSize", "x", bus_property_get_long, offsetof(Socket, mq_msgsize), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("TCPCongestion", "s", NULL, offsetof(Socket, tcp_congestion), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("ReusePort", "b", bus_property_get_bool, offsetof(Socket, reuse_port), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("SmackLabel", "s", NULL, offsetof(Socket, smack), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("SmackLabelIPIn", "s", NULL, offsetof(Socket, smack_ip_in), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("SmackLabelIPOut", "s", NULL, offsetof(Socket, smack_ip_out), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Socket, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Socket, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("NConnections", "u", bus_property_get_unsigned, offsetof(Socket, n_connections), 0), + SD_BUS_PROPERTY("NAccepted", "u", bus_property_get_unsigned, offsetof(Socket, n_accepted), 0), + SD_BUS_PROPERTY("NRefused", "u", bus_property_get_unsigned, offsetof(Socket, n_refused), 0), + SD_BUS_PROPERTY("FileDescriptorName", "s", property_get_fdname, 0, 0), + SD_BUS_PROPERTY("SocketProtocol", "i", bus_property_get_int, offsetof(Socket, socket_protocol), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("TriggerLimitIntervalUSec", "t", bus_property_get_usec, offsetof(Socket, trigger_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("TriggerLimitBurst", "u", bus_property_get_unsigned, offsetof(Socket, trigger_limit.burst), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("UID", "u", bus_property_get_uid, offsetof(Unit, ref_uid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("GID", "u", bus_property_get_gid, offsetof(Unit, ref_gid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + BUS_EXEC_COMMAND_LIST_VTABLE("ExecStartPre", offsetof(Socket, exec_command[SOCKET_EXEC_START_PRE]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION), + BUS_EXEC_COMMAND_LIST_VTABLE("ExecStartPost", offsetof(Socket, exec_command[SOCKET_EXEC_START_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION), + BUS_EXEC_COMMAND_LIST_VTABLE("ExecStopPre", offsetof(Socket, exec_command[SOCKET_EXEC_STOP_PRE]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION), + BUS_EXEC_COMMAND_LIST_VTABLE("ExecStopPost", offsetof(Socket, exec_command[SOCKET_EXEC_STOP_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION), + SD_BUS_VTABLE_END +}; + +static bool check_size_t_truncation(uint64_t t) { + return (size_t) t == t; +} + +static const char* socket_protocol_to_string(int32_t i) { + if (i == IPPROTO_IP) + return ""; + + if (!IN_SET(i, IPPROTO_UDPLITE, IPPROTO_SCTP)) + return NULL; + + return ip_protocol_to_name(i); +} + +static BUS_DEFINE_SET_TRANSIENT(int, "i", int32_t, int, "%" PRIi32); +static BUS_DEFINE_SET_TRANSIENT(message_queue, "x", int64_t, long, "%" PRIi64); +static BUS_DEFINE_SET_TRANSIENT_IS_VALID(size_t_check_truncation, "t", uint64_t, size_t, "%" PRIu64, check_size_t_truncation); +static BUS_DEFINE_SET_TRANSIENT_PARSE(bind_ipv6_only, SocketAddressBindIPv6Only, socket_address_bind_ipv6_only_or_bool_from_string); +static BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(fdname, fdname_is_valid); +static BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(ifname, ifname_valid); +static BUS_DEFINE_SET_TRANSIENT_TO_STRING_ALLOC(ip_tos, "i", int32_t, int, "%" PRIi32, ip_tos_to_string_alloc); +static BUS_DEFINE_SET_TRANSIENT_TO_STRING(socket_protocol, "i", int32_t, int, "%" PRIi32, socket_protocol_to_string); + +static int bus_socket_set_transient_property( + Socket *s, + const char *name, + sd_bus_message *message, + UnitWriteFlags flags, + sd_bus_error *error) { + + SocketExecCommand ci; + Unit *u = UNIT(s); + int r; + + assert(s); + assert(name); + assert(message); + + flags |= UNIT_PRIVATE; + + if (streq(name, "Accept")) + return bus_set_transient_bool(u, name, &s->accept, message, flags, error); + + if (streq(name, "Writable")) + return bus_set_transient_bool(u, name, &s->writable, message, flags, error); + + if (streq(name, "KeepAlive")) + return bus_set_transient_bool(u, name, &s->keep_alive, message, flags, error); + + if (streq(name, "NoDelay")) + return bus_set_transient_bool(u, name, &s->no_delay, message, flags, error); + + if (streq(name, "FreeBind")) + return bus_set_transient_bool(u, name, &s->free_bind, message, flags, error); + + if (streq(name, "Transparent")) + return bus_set_transient_bool(u, name, &s->transparent, message, flags, error); + + if (streq(name, "Broadcast")) + return bus_set_transient_bool(u, name, &s->broadcast, message, flags, error); + + if (streq(name, "PassCredentials")) + return bus_set_transient_bool(u, name, &s->pass_cred, message, flags, error); + + if (streq(name, "PassSecurity")) + return bus_set_transient_bool(u, name, &s->pass_sec, message, flags, error); + + if (streq(name, "ReusePort")) + return bus_set_transient_bool(u, name, &s->reuse_port, message, flags, error); + + if (streq(name, "RemoveOnStop")) + return bus_set_transient_bool(u, name, &s->remove_on_stop, message, flags, error); + + if (streq(name, "SELinuxContextFromNet")) + return bus_set_transient_bool(u, name, &s->selinux_context_from_net, message, flags, error); + + if (streq(name, "Priority")) + return bus_set_transient_int(u, name, &s->priority, message, flags, error); + + if (streq(name, "IPTTL")) + return bus_set_transient_int(u, name, &s->ip_ttl, message, flags, error); + + if (streq(name, "Mark")) + return bus_set_transient_int(u, name, &s->mark, message, flags, error); + + if (streq(name, "Backlog")) + return bus_set_transient_unsigned(u, name, &s->backlog, message, flags, error); + + if (streq(name, "MaxConnections")) + return bus_set_transient_unsigned(u, name, &s->max_connections, message, flags, error); + + if (streq(name, "MaxConnectionsPerSource")) + return bus_set_transient_unsigned(u, name, &s->max_connections_per_source, message, flags, error); + + if (streq(name, "KeepAliveProbes")) + return bus_set_transient_unsigned(u, name, &s->keep_alive_cnt, message, flags, error); + + if (streq(name, "TriggerLimitBurst")) + return bus_set_transient_unsigned(u, name, &s->trigger_limit.burst, message, flags, error); + + if (streq(name, "SocketMode")) + return bus_set_transient_mode_t(u, name, &s->socket_mode, message, flags, error); + + if (streq(name, "DirectoryMode")) + return bus_set_transient_mode_t(u, name, &s->directory_mode, message, flags, error); + + if (streq(name, "MessageQueueMaxMessages")) + return bus_set_transient_message_queue(u, name, &s->mq_maxmsg, message, flags, error); + + if (streq(name, "MessageQueueMessageSize")) + return bus_set_transient_message_queue(u, name, &s->mq_msgsize, message, flags, error); + + if (streq(name, "TimeoutUSec")) + return bus_set_transient_usec_fix_0(u, name, &s->timeout_usec, message, flags, error); + + if (streq(name, "KeepAliveTimeUSec")) + return bus_set_transient_usec(u, name, &s->keep_alive_time, message, flags, error); + + if (streq(name, "KeepAliveIntervalUSec")) + return bus_set_transient_usec(u, name, &s->keep_alive_interval, message, flags, error); + + if (streq(name, "DeferAcceptUSec")) + return bus_set_transient_usec(u, name, &s->defer_accept, message, flags, error); + + if (streq(name, "TriggerLimitIntervalUSec")) + return bus_set_transient_usec(u, name, &s->trigger_limit.interval, message, flags, error); + + if (streq(name, "SmackLabel")) + return bus_set_transient_string(u, name, &s->smack, message, flags, error); + + if (streq(name, "SmackLabelIPin")) + return bus_set_transient_string(u, name, &s->smack_ip_in, message, flags, error); + + if (streq(name, "SmackLabelIPOut")) + return bus_set_transient_string(u, name, &s->smack_ip_out, message, flags, error); + + if (streq(name, "TCPCongestion")) + return bus_set_transient_string(u, name, &s->tcp_congestion, message, flags, error); + + if (streq(name, "FileDescriptorName")) + return bus_set_transient_fdname(u, name, &s->fdname, message, flags, error); + + if (streq(name, "SocketUser")) + return bus_set_transient_user(u, name, &s->user, message, flags, error); + + if (streq(name, "SocketGroup")) + return bus_set_transient_user(u, name, &s->group, message, flags, error); + + if (streq(name, "BindIPv6Only")) + return bus_set_transient_bind_ipv6_only(u, name, &s->bind_ipv6_only, message, flags, error); + + if (streq(name, "ReceiveBuffer")) + return bus_set_transient_size_t_check_truncation(u, name, &s->receive_buffer, message, flags, error); + + if (streq(name, "SendBuffer")) + return bus_set_transient_size_t_check_truncation(u, name, &s->send_buffer, message, flags, error); + + if (streq(name, "PipeSize")) + return bus_set_transient_size_t_check_truncation(u, name, &s->pipe_size, message, flags, error); + + if (streq(name, "BindToDevice")) + return bus_set_transient_ifname(u, name, &s->bind_to_device, message, flags, error); + + if (streq(name, "IPTOS")) + return bus_set_transient_ip_tos(u, name, &s->ip_tos, message, flags, error); + + if (streq(name, "SocketProtocol")) + return bus_set_transient_socket_protocol(u, name, &s->socket_protocol, message, flags, error); + + if ((ci = socket_exec_command_from_string(name)) >= 0) + return bus_set_transient_exec_command(u, name, &s->exec_command[ci], message, flags, error); + + if (streq(name, "Symlinks")) { + _cleanup_strv_free_ char **l = NULL; + char **p; + + r = sd_bus_message_read_strv(message, &l); + if (r < 0) + return r; + + STRV_FOREACH(p, l) { + if (!path_is_absolute(*p)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Symlink path is not absolute: %s", *p); + } + + if (!UNIT_WRITE_FLAGS_NOOP(flags)) { + if (strv_isempty(l)) { + s->symlinks = strv_free(s->symlinks); + unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "%s=", name); + } else { + _cleanup_free_ char *joined = NULL; + + r = strv_extend_strv(&s->symlinks, l, true); + if (r < 0) + return -ENOMEM; + + joined = strv_join(l, " "); + if (!joined) + return -ENOMEM; + + unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "%s=%s", name, joined); + } + } + + return 1; + + } else if (streq(name, "Listen")) { + const char *t, *a; + bool empty = true; + + r = sd_bus_message_enter_container(message, 'a', "(ss)"); + if (r < 0) + return r; + + while ((r = sd_bus_message_read(message, "(ss)", &t, &a)) > 0) { + _cleanup_free_ SocketPort *p = NULL; + + p = new(SocketPort, 1); + if (!p) + return log_oom(); + + *p = (SocketPort) { + .fd = -1, + .socket = s, + }; + + p->type = socket_port_type_from_string(t); + if (p->type < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown Socket type: %s", t); + + if (p->type != SOCKET_SOCKET) { + if (!path_is_valid(p->path)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid socket path: %s", t); + + p->path = strdup(a); + if (!p->path) + return log_oom(); + + path_simplify(p->path, false); + + } else if (streq(t, "Netlink")) { + r = socket_address_parse_netlink(&p->address, a); + if (r < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid netlink address: %s", a); + + } else { + r = socket_address_parse(&p->address, a); + if (r < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address: %s", a); + + p->address.type = socket_address_type_from_string(t); + if (p->address.type < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address type: %s", t); + + if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Address family not supported: %s", a); + } + + empty = false; + + if (!UNIT_WRITE_FLAGS_NOOP(flags)) { + LIST_APPEND(port, s->ports, TAKE_PTR(p)); + unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "Listen%s=%s", t, a); + } + } + if (r < 0) + return r; + + r = sd_bus_message_exit_container(message); + if (r < 0) + return r; + + if (!UNIT_WRITE_FLAGS_NOOP(flags) && empty) { + socket_free_ports(s); + unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "ListenStream="); + } + + return 1; + } + + return 0; +} + +int bus_socket_set_property( + Unit *u, + const char *name, + sd_bus_message *message, + UnitWriteFlags flags, + sd_bus_error *error) { + + Socket *s = SOCKET(u); + int r; + + assert(s); + assert(name); + assert(message); + + assert(s); + assert(name); + assert(message); + + r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, flags, error); + if (r != 0) + return r; + + if (u->transient && u->load_state == UNIT_STUB) { + /* This is a transient unit, let's load a little more */ + + r = bus_socket_set_transient_property(s, name, message, flags, error); + if (r != 0) + return r; + + r = bus_exec_context_set_transient_property(u, &s->exec_context, name, message, flags, error); + if (r != 0) + return r; + + r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, flags, error); + if (r != 0) + return r; + } + + return 0; +} + +int bus_socket_commit_properties(Unit *u) { + assert(u); + + unit_invalidate_cgroup_members_masks(u); + unit_realize_cgroup(u); + + return 0; +} |