Systemd/src/core/dbus-socket.c
Zbigniew Jędrzejewski-Szmek 11a1589223 tree-wide: drop license boilerplate
Files which are installed as-is (any .service and other unit files, .conf
files, .policy files, etc), are left as is. My assumption is that SPDX
identifiers are not yet that well known, so it's better to retain the
extended header to avoid any doubt.

I also kept any copyright lines. We can probably remove them, but it'd nice to
obtain explicit acks from all involved authors before doing that.
2018-04-06 18:58:55 +02:00

489 lines
23 KiB
C

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
***/
#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 "parse-util.h"
#include "path-util.h"
#include "socket.h"
#include "socket-protocol-list.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 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);
}
static int property_get_fdname(
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);
assert(bus);
assert(reply);
assert(s);
return sd_bus_message_append(reply, "s", socket_fdname(s));
}
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("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", NULL, offsetof(Unit, ref_uid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("GID", "u", NULL, 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 inline bool check_size_t_truncation(uint64_t t) {
return (size_t) t == t;
}
static inline const char* socket_protocol_to_name_supported(int32_t i) {
if (!IN_SET(i, IPPROTO_UDPLITE, IPPROTO_SCTP))
return NULL;
return socket_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, parse_socket_address_bind_ipv6_only_or_bool);
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_name_supported);
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 = new0(SocketPort, 1);
if (!p)
return log_oom();
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) {
p->path = strdup(a);
path_kill_slashes(p->path);
} 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);
}
p->fd = -1;
p->auxiliary_fds = NULL;
p->n_auxiliary_fds = 0;
p->socket = s;
empty = false;
if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
SocketPort *tail;
LIST_FIND_TAIL(port, s->ports, tail);
LIST_INSERT_AFTER(port, s->ports, tail, p);
p = NULL;
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_update_cgroup_members_masks(u);
unit_realize_cgroup(u);
return 0;
}