#include <netdb.h>
#include <sys/poll.h>
#include <byteswap.h>
+#include <sys/mman.h>
+#include <pthread.h>
#include "util.h"
#include "macro.h"
+#include "strv.h"
+#include "set.h"
+#include "missing.h"
#include "sd-bus.h"
#include "bus-internal.h"
#include "bus-message.h"
#include "bus-type.h"
+#include "bus-socket.h"
+#include "bus-kernel.h"
+#include "bus-control.h"
+#include "bus-introspect.h"
+#include "bus-signature.h"
+#include "bus-objects.h"
+#include "bus-util.h"
+#include "bus-container.h"
+
+static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec);
+
+static void bus_close_fds(sd_bus *b) {
+ assert(b);
+
+ if (b->input_fd >= 0)
+ close_nointr_nofail(b->input_fd);
+
+ if (b->output_fd >= 0 && b->output_fd != b->input_fd)
+ close_nointr_nofail(b->output_fd);
+
+ b->input_fd = b->output_fd = -1;
+}
+
+static void bus_node_destroy(sd_bus *b, struct node *n) {
+ struct node_callback *c;
+ struct node_vtable *v;
+ struct node_enumerator *e;
+
+ assert(b);
+
+ if (!n)
+ return;
+
+ while (n->child)
+ bus_node_destroy(b, n->child);
+
+ while ((c = n->callbacks)) {
+ LIST_REMOVE(callbacks, n->callbacks, c);
+ free(c);
+ }
+
+ while ((v = n->vtables)) {
+ LIST_REMOVE(vtables, n->vtables, v);
+ free(v->interface);
+ free(v);
+ }
-#define WQUEUE_MAX 128
+ while ((e = n->enumerators)) {
+ LIST_REMOVE(enumerators, n->enumerators, e);
+ free(e);
+ }
+
+ if (n->parent)
+ LIST_REMOVE(siblings, n->parent->child, n);
+
+ assert_se(hashmap_remove(b->nodes, n->path) == n);
+ free(n->path);
+ free(n);
+}
static void bus_free(sd_bus *b) {
struct filter_callback *f;
+ struct node *n;
+ unsigned i;
assert(b);
- if (b->fd >= 0)
- close_nointr_nofail(b->fd);
+ sd_bus_detach_event(b);
+
+ bus_close_fds(b);
+
+ if (b->kdbus_buffer)
+ munmap(b->kdbus_buffer, KDBUS_POOL_SIZE);
free(b->rbuffer);
+ free(b->unique_name);
+ free(b->auth_buffer);
+ free(b->address);
+ free(b->kernel);
+ free(b->machine);
+
+ free(b->exec_path);
+ strv_free(b->exec_argv);
+
+ close_many(b->fds, b->n_fds);
+ free(b->fds);
+
+ for (i = 0; i < b->rqueue_size; i++)
+ sd_bus_message_unref(b->rqueue[i]);
free(b->rqueue);
+
+ for (i = 0; i < b->wqueue_size; i++)
+ sd_bus_message_unref(b->wqueue[i]);
free(b->wqueue);
- free(b->unique_name);
hashmap_free_free(b->reply_callbacks);
+ prioq_free(b->reply_callbacks_prioq);
while ((f = b->filter_callbacks)) {
- LIST_REMOVE(struct filter_callback, callbacks, b->filter_callbacks, f);
+ LIST_REMOVE(callbacks, b->filter_callbacks, f);
free(f);
}
+ bus_match_free(&b->match_callbacks);
+
+ hashmap_free_free(b->vtable_methods);
+ hashmap_free_free(b->vtable_properties);
+
+ while ((n = hashmap_first(b->nodes)))
+ bus_node_destroy(b, n);
+
+ hashmap_free(b->nodes);
+
+ bus_kernel_flush_memfd(b);
+
+ assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0);
+
free(b);
}
-static sd_bus* bus_new(void) {
+_public_ int sd_bus_new(sd_bus **ret) {
sd_bus *r;
+ assert_return(ret, -EINVAL);
+
r = new0(sd_bus, 1);
if (!r)
- return NULL;
+ return -ENOMEM;
- r->n_ref = 1;
- r->fd = -1;
+ r->n_ref = REFCNT_INIT;
+ r->input_fd = r->output_fd = -1;
r->message_version = 1;
+ r->hello_flags |= KDBUS_HELLO_ACCEPT_FD;
+ r->original_pid = getpid();
+
+ assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0);
/* We guarantee that wqueue always has space for at least one
* entry */
r->wqueue = new(sd_bus_message*, 1);
if (!r->wqueue) {
free(r);
- return NULL;
+ return -ENOMEM;
}
- return r;
-};
+ *ret = r;
+ return 0;
+}
+
+_public_ int sd_bus_set_address(sd_bus *bus, const char *address) {
+ char *a;
+
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(address, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ a = strdup(address);
+ if (!a)
+ return -ENOMEM;
+
+ free(bus->address);
+ bus->address = a;
+
+ return 0;
+}
+
+_public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(input_fd >= 0, -EINVAL);
+ assert_return(output_fd >= 0, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ bus->input_fd = input_fd;
+ bus->output_fd = output_fd;
+ return 0;
+}
+
+_public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) {
+ char *p, **a;
+
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(path, -EINVAL);
+ assert_return(!strv_isempty(argv), -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ p = strdup(path);
+ if (!p)
+ return -ENOMEM;
+
+ a = strv_copy(argv);
+ if (!a) {
+ free(p);
+ return -ENOMEM;
+ }
+
+ free(bus->exec_path);
+ strv_free(bus->exec_argv);
+
+ bus->exec_path = p;
+ bus->exec_argv = a;
+
+ return 0;
+}
+
+_public_ int sd_bus_set_bus_client(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ bus->bus_client = !!b;
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_timestamp(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_TIMESTAMP, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_creds(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CREDS, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_comm(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_COMM, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_exe(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_EXE, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_cmdline(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CMDLINE, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_cgroup(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CGROUP, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_caps(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CAPS, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_selinux_context(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_SECLABEL, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_audit(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_AUDIT, b);
+ return 0;
+}
+
+_public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) {
+ assert_return(bus, -EINVAL);
+ assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ bus->is_server = !!b;
+ bus->server_id = server_id;
+ return 0;
+}
+
+_public_ int sd_bus_set_anonymous(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ bus->anonymous_auth = !!b;
+ return 0;
+}
static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata) {
const char *s;
int r;
assert(bus);
+ assert(bus->state == BUS_HELLO);
assert(reply);
- bus->state = BUS_RUNNING;
+ r = sd_bus_message_get_errno(reply);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ return -r;
r = sd_bus_message_read(reply, "s", &s);
if (r < 0)
return r;
+ if (!service_name_is_valid(s) || s[0] != ':')
+ return -EBADMSG;
+
bus->unique_name = strdup(s);
if (!bus->unique_name)
return -ENOMEM;
+ bus->state = BUS_RUNNING;
+
return 1;
}
assert(bus);
+ if (!bus->bus_client || bus->is_kernel)
+ return 0;
+
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.DBus",
if (r < 0)
return r;
- r = sd_bus_send_with_reply(bus, m, hello_callback, NULL, (uint64_t) -1, NULL);
- if (r < 0)
- return r;
-
- return 0;
+ return sd_bus_call_async(bus, m, hello_callback, NULL, 0, &bus->hello_serial);
}
-static int bus_start_running(sd_bus *bus) {
- int r;
-
+int bus_start_running(sd_bus *bus) {
assert(bus);
- if (bus->send_hello) {
+ if (bus->bus_client && !bus->is_kernel) {
bus->state = BUS_HELLO;
-
- r = bus_send_hello(bus);
- if (r < 0)
- return r;
+ return 1;
}
bus->state = BUS_RUNNING;
-
- return 0;
+ return 1;
}
static int parse_address_key(const char **p, const char *key, char **value) {
assert(p);
assert(*p);
- assert(key);
assert(value);
- l = strlen(key);
- if (!strncmp(*p, key, l) != 0)
- return 0;
+ if (key) {
+ l = strlen(key);
+ if (strncmp(*p, key, l) != 0)
+ return 0;
- if ((*p)[l] != '=')
- return 0;
+ if ((*p)[l] != '=')
+ return 0;
- if (*value)
- return -EINVAL;
+ if (*value)
+ return -EINVAL;
+
+ a = *p + l + 1;
+ } else
+ a = *p;
- a = *p + l + 1;
- while (*a != ';' && *a != 0) {
+ while (*a != ';' && *a != ',' && *a != 0) {
char c, *t;
if (*a == '%') {
return y;
}
- a += 3;
c = (char) ((x << 4) | y);
- } else
+ a += 3;
+ } else {
c = *a;
+ a++;
+ }
- t = realloc(r, n + 1);
+ t = realloc(r, n + 2);
if (!t) {
free(r);
return -ENOMEM;
r[n++] = c;
}
+ if (!r) {
+ r = strdup("");
+ if (!r)
+ return -ENOMEM;
+ } else
+ r[n] = 0;
+
+ if (*a == ',')
+ a++;
+
*p = a;
+
+ free(*value);
*value = r;
+
return 1;
}
assert(p);
assert(*p);
- *p += strcspn(*p, ";");
+ *p += strcspn(*p, ",");
+
+ if (**p == ',')
+ (*p) ++;
}
-static int bus_parse_next_address(sd_bus *b) {
- const char *a, *p;
- _cleanup_free_ char *guid = NULL;
+static int parse_unix_address(sd_bus *b, const char **p, char **guid) {
+ _cleanup_free_ char *path = NULL, *abstract = NULL;
+ size_t l;
int r;
assert(b);
+ assert(p);
+ assert(*p);
+ assert(guid);
- if (!b->address)
- return 0;
- if (b->address[b->address_index] == 0)
- return 0;
+ while (**p != 0 && **p != ';') {
+ r = parse_address_key(p, "guid", guid);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- a = b->address + b->address_index;
+ r = parse_address_key(p, "path", &path);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- zero(b->sockaddr);
- b->sockaddr_size = 0;
- b->peer = SD_ID128_NULL;
+ r = parse_address_key(p, "abstract", &abstract);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- if (startswith(a, "unix:")) {
- _cleanup_free_ char *path = NULL, *abstract = NULL;
+ skip_address_key(p);
+ }
- p = a + 5;
- while (*p != 0 && *p != ';') {
- r = parse_address_key(&p, "guid", &guid);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
+ if (!path && !abstract)
+ return -EINVAL;
- r = parse_address_key(&p, "path", &path);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
+ if (path && abstract)
+ return -EINVAL;
- r = parse_address_key(&p, "abstract", &abstract);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
+ if (path) {
+ l = strlen(path);
+ if (l > sizeof(b->sockaddr.un.sun_path))
+ return -E2BIG;
+
+ b->sockaddr.un.sun_family = AF_UNIX;
+ strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path));
+ b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l;
+ } else if (abstract) {
+ l = strlen(abstract);
+ if (l > sizeof(b->sockaddr.un.sun_path) - 1)
+ return -E2BIG;
+
+ b->sockaddr.un.sun_family = AF_UNIX;
+ b->sockaddr.un.sun_path[0] = 0;
+ strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1);
+ b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
+ }
- skip_address_key(&p);
- }
+ return 0;
+}
- if (!path && !abstract)
- return -EINVAL;
+static int parse_tcp_address(sd_bus *b, const char **p, char **guid) {
+ _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL;
+ int r;
+ struct addrinfo *result, hints = {
+ .ai_socktype = SOCK_STREAM,
+ .ai_flags = AI_ADDRCONFIG,
+ };
- if (path && abstract)
- return -EINVAL;
+ assert(b);
+ assert(p);
+ assert(*p);
+ assert(guid);
- if (path) {
- size_t l;
+ while (**p != 0 && **p != ';') {
+ r = parse_address_key(p, "guid", guid);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- l = strlen(path);
- if (l > sizeof(b->sockaddr.un.sun_path))
- return -E2BIG;
+ r = parse_address_key(p, "host", &host);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- b->sockaddr.un.sun_family = AF_UNIX;
- strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path));
- b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l;
- } else if (abstract) {
- size_t l;
+ r = parse_address_key(p, "port", &port);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- l = strlen(path);
- if (l > sizeof(b->sockaddr.un.sun_path) - 1)
- return -E2BIG;
+ r = parse_address_key(p, "family", &family);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- b->sockaddr.un.sun_family = AF_UNIX;
- b->sockaddr.un.sun_path[0] = 0;
- strncpy(b->sockaddr.un.sun_path+1, path, sizeof(b->sockaddr.un.sun_path)-1);
- b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
- }
+ skip_address_key(p);
+ }
- } else if (startswith(a, "tcp:")) {
- _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL;
- struct addrinfo hints, *result;
+ if (!host || !port)
+ return -EINVAL;
- p = a + 4;
- while (*p != 0 && *p != ';') {
- r = parse_address_key(&p, "guid", &guid);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
+ if (family) {
+ if (streq(family, "ipv4"))
+ hints.ai_family = AF_INET;
+ else if (streq(family, "ipv6"))
+ hints.ai_family = AF_INET6;
+ else
+ return -EINVAL;
+ }
- r = parse_address_key(&p, "host", &host);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
+ r = getaddrinfo(host, port, &hints, &result);
+ if (r == EAI_SYSTEM)
+ return -errno;
+ else if (r != 0)
+ return -EADDRNOTAVAIL;
- r = parse_address_key(&p, "port", &port);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
+ memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen);
+ b->sockaddr_size = result->ai_addrlen;
- r = parse_address_key(&p, "family", &family);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
+ freeaddrinfo(result);
- skip_address_key(&p);
- }
+ return 0;
+}
- if (!host || !port)
- return -EINVAL;
+static int parse_exec_address(sd_bus *b, const char **p, char **guid) {
+ char *path = NULL;
+ unsigned n_argv = 0, j;
+ char **argv = NULL;
+ int r;
- zero(hints);
- hints.ai_socktype = SOCK_STREAM;
- hints.ai_flags = AI_ADDRCONFIG;
-
- if (family) {
- if (streq(family, "ipv4"))
- hints.ai_family = AF_INET;
- else if (streq(family, "ipv6"))
- hints.ai_family = AF_INET6;
- else
- return -EINVAL;
- }
+ assert(b);
+ assert(p);
+ assert(*p);
+ assert(guid);
- r = getaddrinfo(host, port, &hints, &result);
- if (r == EAI_SYSTEM)
- return -errno;
- else if (r != 0)
- return -EADDRNOTAVAIL;
+ while (**p != 0 && **p != ';') {
+ r = parse_address_key(p, "guid", guid);
+ if (r < 0)
+ goto fail;
+ else if (r > 0)
+ continue;
- memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen);
- b->sockaddr_size = result->ai_addrlen;
+ r = parse_address_key(p, "path", &path);
+ if (r < 0)
+ goto fail;
+ else if (r > 0)
+ continue;
- freeaddrinfo(result);
- }
+ if (startswith(*p, "argv")) {
+ unsigned ul;
- if (guid) {
- r = sd_id128_from_string(guid, &b->peer);
- if (r < 0)
- return r;
- }
+ errno = 0;
+ ul = strtoul(*p + 4, (char**) p, 10);
+ if (errno > 0 || **p != '=' || ul > 256) {
+ r = -EINVAL;
+ goto fail;
+ }
- b->address_index = p - b->address;
- return 1;
-}
+ (*p) ++;
-static void iovec_advance(struct iovec *iov, unsigned *idx, size_t size) {
+ if (ul >= n_argv) {
+ char **x;
- while (size > 0) {
- struct iovec *i = iov + *idx;
+ x = realloc(argv, sizeof(char*) * (ul + 2));
+ if (!x) {
+ r = -ENOMEM;
+ goto fail;
+ }
- if (i->iov_len > size) {
- i->iov_base = (uint8_t*) i->iov_base + size;
- i->iov_len -= size;
- return;
- }
+ memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2));
- size -= i->iov_len;
+ argv = x;
+ n_argv = ul + 1;
+ }
- i->iov_base = NULL;
- i->iov_len = 0;
+ r = parse_address_key(p, NULL, argv + ul);
+ if (r < 0)
+ goto fail;
- (*idx) ++;
- }
-}
+ continue;
+ }
-static int bus_write_auth(sd_bus *b) {
- struct msghdr mh;
- ssize_t k;
+ skip_address_key(p);
+ }
- assert(b);
- assert(b->state == BUS_AUTHENTICATING);
+ if (!path) {
+ r = -EINVAL;
+ goto fail;
+ }
- if (b->auth_index >= ELEMENTSOF(b->auth_iovec))
- return 0;
+ /* Make sure there are no holes in the array, with the
+ * exception of argv[0] */
+ for (j = 1; j < n_argv; j++)
+ if (!argv[j]) {
+ r = -EINVAL;
+ goto fail;
+ }
- zero(mh);
- mh.msg_iov = b->auth_iovec + b->auth_index;
- mh.msg_iovlen = ELEMENTSOF(b->auth_iovec) - b->auth_index;
+ if (argv && argv[0] == NULL) {
+ argv[0] = strdup(path);
+ if (!argv[0]) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
- k = sendmsg(b->fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
- if (k < 0)
- return errno == EAGAIN ? 0 : -errno;
+ b->exec_path = path;
+ b->exec_argv = argv;
+ return 0;
- iovec_advance(b->auth_iovec, &b->auth_index, (size_t) k);
+fail:
+ for (j = 0; j < n_argv; j++)
+ free(argv[j]);
- return 1;
+ free(argv);
+ free(path);
+ return r;
}
-static int bus_auth_verify(sd_bus *b) {
- char *e, *f;
- sd_id128_t peer;
- unsigned i;
+static int parse_kernel_address(sd_bus *b, const char **p, char **guid) {
+ _cleanup_free_ char *path = NULL;
int r;
- /* We expect two response lines: "OK", "AGREE_UNIX_FD", and
- * that's it */
+ assert(b);
+ assert(p);
+ assert(*p);
+ assert(guid);
- e = memmem(b->rbuffer, b->rbuffer_size, "\r\n", 2);
- if (!e)
- return 0;
+ while (**p != 0 && **p != ';') {
+ r = parse_address_key(p, "guid", guid);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- f = memmem(e, b->rbuffer_size - (e - (char*) b->rbuffer), "\r\n", 2);
- if (!f)
- return 0;
+ r = parse_address_key(p, "path", &path);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- if (e - (char*) b->rbuffer != 3 + 32)
- return -EPERM;
+ skip_address_key(p);
+ }
- if (memcmp(b->rbuffer, "OK ", 3))
- return -EPERM;
+ if (!path)
+ return -EINVAL;
- for (i = 0; i < 32; i += 2) {
- int x, y;
+ free(b->kernel);
+ b->kernel = path;
+ path = NULL;
- x = unhexchar(((char*) b->rbuffer)[3 + i]);
- y = unhexchar(((char*) b->rbuffer)[3 + i + 2]);
+ return 0;
+}
- if (x < 0 || y < 0)
- return -EINVAL;
+static int parse_container_address(sd_bus *b, const char **p, char **guid) {
+ _cleanup_free_ char *machine = NULL;
+ int r;
+
+ assert(b);
+ assert(p);
+ assert(*p);
+ assert(guid);
+
+ while (**p != 0 && **p != ';') {
+ r = parse_address_key(p, "guid", guid);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
+
+ r = parse_address_key(p, "machine", &machine);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
- peer.bytes[i/2] = ((uint8_t) x << 4 | (uint8_t) y);
+ skip_address_key(p);
}
- if (!sd_id128_equal(b->peer, SD_ID128_NULL) &&
- !sd_id128_equal(b->peer, peer))
- return -EPERM;
+ if (!machine)
+ return -EINVAL;
- b->peer = peer;
+ free(b->machine);
+ b->machine = machine;
+ machine = NULL;
- b->can_fds =
- (f - e == sizeof("\r\nAGREE_UNIX_FD") - 1) &&
- memcmp(e + 2, "AGREE_UNIX_FD", sizeof("AGREE_UNIX_FD") - 1) == 0;
+ b->sockaddr.un.sun_family = AF_UNIX;
+ strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
+ b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/var/run/dbus/system_bus_socket") - 1;
- if (f + 2 > (char*) b->rbuffer + b->rbuffer_size) {
- b->rbuffer_size -= (f - (char*) b->rbuffer);
- memmove(b->rbuffer, f + 2, b->rbuffer_size);
- }
+ return 0;
+}
- r = bus_start_running(b);
- if (r < 0)
- return r;
+static void bus_reset_parsed_address(sd_bus *b) {
+ assert(b);
- return 1;
+ zero(b->sockaddr);
+ b->sockaddr_size = 0;
+ strv_free(b->exec_argv);
+ free(b->exec_path);
+ b->exec_path = NULL;
+ b->exec_argv = NULL;
+ b->server_id = SD_ID128_NULL;
+ free(b->kernel);
+ b->kernel = NULL;
+ free(b->machine);
+ b->machine = NULL;
}
-static int bus_read_auth(sd_bus *b) {
- struct msghdr mh;
- struct iovec iov;
- size_t n;
- ssize_t k;
+static int bus_parse_next_address(sd_bus *b) {
+ _cleanup_free_ char *guid = NULL;
+ const char *a;
int r;
assert(b);
- r = bus_auth_verify(b);
- if (r != 0)
- return r;
+ if (!b->address)
+ return 0;
+ if (b->address[b->address_index] == 0)
+ return 0;
+
+ bus_reset_parsed_address(b);
- n = MAX(3 + 32 + 2 + sizeof("AGREE_UNIX_FD") - 1 + 2, b->rbuffer_size * 2);
+ a = b->address + b->address_index;
- zero(iov);
- iov.iov_base = (uint8_t*) b->rbuffer + b->rbuffer_size;
- iov.iov_len = n - b->rbuffer_size;
+ while (*a != 0) {
- zero(mh);
- mh.msg_iov = &iov;
- mh.msg_iovlen = 1;
+ if (*a == ';') {
+ a++;
+ continue;
+ }
- k = recvmsg(b->fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
- if (k < 0)
- return errno == EAGAIN ? 0 : -errno;
+ if (startswith(a, "unix:")) {
+ a += 5;
- b->rbuffer_size += k;
+ r = parse_unix_address(b, &a, &guid);
+ if (r < 0)
+ return r;
+ break;
- r = bus_auth_verify(b);
- if (r != 0)
- return r;
+ } else if (startswith(a, "tcp:")) {
- return 0;
-}
+ a += 4;
+ r = parse_tcp_address(b, &a, &guid);
+ if (r < 0)
+ return r;
-static int bus_start_auth(sd_bus *b) {
- static const char auth_prefix[] = "\0AUTH_EXTERNAL ";
- static const char auth_suffix[] = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
+ break;
- char text[20 + 1]; /* enough space for a 64bit integer plus NUL */
- size_t l;
+ } else if (startswith(a, "unixexec:")) {
- assert(b);
+ a += 9;
+ r = parse_exec_address(b, &a, &guid);
+ if (r < 0)
+ return r;
+
+ break;
- b->state = BUS_AUTHENTICATING;
+ } else if (startswith(a, "kernel:")) {
- snprintf(text, sizeof(text), "%llu", (unsigned long long) geteuid());
- char_array_0(text);
+ a += 7;
+ r = parse_kernel_address(b, &a, &guid);
+ if (r < 0)
+ return r;
- l = strlen(text);
- b->auth_uid = hexmem(text, l);
- if (!b->auth_uid)
- return -ENOMEM;
+ break;
+ } else if (startswith(a, "x-container:")) {
+
+ a += 12;
+ r = parse_container_address(b, &a, &guid);
+ if (r < 0)
+ return r;
- b->auth_iovec[0].iov_base = (void*) auth_prefix;
- b->auth_iovec[0].iov_len = sizeof(auth_prefix) -1;
- b->auth_iovec[1].iov_base = (void*) b->auth_uid;
- b->auth_iovec[1].iov_len = l * 2;
- b->auth_iovec[2].iov_base = (void*) auth_suffix;
- b->auth_iovec[2].iov_len = sizeof(auth_suffix) -1;
- b->auth_size = sizeof(auth_prefix) - 1 + l * 2 + sizeof(auth_suffix) - 1;
+ break;
+ }
+
+ a = strchr(a, ';');
+ if (!a)
+ return 0;
+ }
+
+ if (guid) {
+ r = sd_id128_from_string(guid, &b->server_id);
+ if (r < 0)
+ return r;
+ }
- return bus_write_auth(b);
+ b->address_index = a - b->address;
+ return 1;
}
-static int bus_start_connect(sd_bus *b) {
+static int bus_start_address(sd_bus *b) {
int r;
assert(b);
- assert(b->fd < 0);
for (;;) {
- if (b->sockaddr.sa.sa_family == AF_UNSPEC) {
- r = bus_parse_next_address(b);
- if (r < 0)
+ sd_bus_close(b);
+
+ if (b->exec_path) {
+
+ r = bus_socket_exec(b);
+ if (r >= 0)
return r;
- if (r == 0)
- return b->last_connect_error ? b->last_connect_error : -ECONNREFUSED;
- }
- b->fd = socket(b->sockaddr.sa.sa_family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (b->fd < 0) {
- b->last_connect_error = -errno;
- zero(b->sockaddr);
- continue;
- }
+ b->last_connect_error = -r;
+ } else if (b->kernel) {
- r = connect(b->fd, &b->sockaddr.sa, b->sockaddr_size);
- if (r < 0) {
- if (errno == EINPROGRESS)
- return 0;
+ r = bus_kernel_connect(b);
+ if (r >= 0)
+ return r;
- b->last_connect_error = -errno;
- close_nointr_nofail(b->fd);
- b->fd = -1;
- zero(b->sockaddr);
- continue;
+ b->last_connect_error = -r;
+
+ } else if (b->machine) {
+
+ r = bus_container_connect(b);
+ if (r >= 0)
+ return r;
+
+ b->last_connect_error = -r;
+
+ } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) {
+
+ r = bus_socket_connect(b);
+ if (r >= 0)
+ return r;
+
+ b->last_connect_error = -r;
}
- return bus_start_auth(b);
+ r = bus_parse_next_address(b);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED;
}
}
-int sd_bus_open_system(sd_bus **ret) {
- const char *e;
- sd_bus *b;
+int bus_next_address(sd_bus *b) {
+ assert(b);
+
+ bus_reset_parsed_address(b);
+ return bus_start_address(b);
+}
+
+static int bus_start_fd(sd_bus *b) {
+ struct stat st;
int r;
- if (!ret)
- return -EINVAL;
+ assert(b);
+ assert(b->input_fd >= 0);
+ assert(b->output_fd >= 0);
- e = getenv("DBUS_SYSTEM_BUS_ADDRESS");
- if (e) {
- r = sd_bus_open_address(e, &b);
+ r = fd_nonblock(b->input_fd, true);
+ if (r < 0)
+ return r;
+
+ r = fd_cloexec(b->input_fd, true);
+ if (r < 0)
+ return r;
+
+ if (b->input_fd != b->output_fd) {
+ r = fd_nonblock(b->output_fd, true);
if (r < 0)
return r;
- b->send_hello = true;
- *ret = b;
- return r;
+ r = fd_cloexec(b->output_fd, true);
+ if (r < 0)
+ return r;
}
- b = bus_new();
- if (!b)
- return -ENOMEM;
+ if (fstat(b->input_fd, &st) < 0)
+ return -errno;
+
+ if (S_ISCHR(b->input_fd))
+ return bus_kernel_take_fd(b);
+ else
+ return bus_socket_take_fd(b);
+}
- b->send_hello = true;
+_public_ int sd_bus_start(sd_bus *bus) {
+ int r;
- b->sockaddr.un.sun_family = AF_UNIX;
- strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
- b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1;
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- r = bus_start_connect(b);
- if (r < 0) {
- bus_free(b);
+ bus->state = BUS_OPENING;
+
+ if (bus->is_server && bus->bus_client)
+ return -EINVAL;
+
+ if (bus->input_fd >= 0)
+ r = bus_start_fd(bus);
+ else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine)
+ r = bus_start_address(bus);
+ else
+ return -EINVAL;
+
+ if (r < 0)
return r;
- }
- *ret = b;
- return 0;
+ return bus_send_hello(bus);
}
-int sd_bus_open_user(sd_bus **ret) {
+_public_ int sd_bus_open_system(sd_bus **ret) {
const char *e;
sd_bus *b;
- size_t l;
int r;
- if (!ret)
- return -EINVAL;
+ assert_return(ret, -EINVAL);
- e = getenv("DBUS_SESSION_BUS_ADDRESS");
+ r = sd_bus_new(&b);
+ if (r < 0)
+ return r;
+
+ e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
if (e) {
- r = sd_bus_open_address(e, &b);
+ r = sd_bus_set_address(b, e);
if (r < 0)
- return r;
-
- b->send_hello = true;
- *ret = b;
- return r;
+ goto fail;
+ } else {
+ b->sockaddr.un.sun_family = AF_UNIX;
+ strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
+ b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1;
}
- e = getenv("XDG_RUNTIME_DIR");
- if (!e)
- return -ENOENT;
+ b->bus_client = true;
- l = strlen(e);
- if (l + 4 > sizeof(b->sockaddr.un.sun_path))
- return -E2BIG;
+ r = sd_bus_start(b);
+ if (r < 0)
+ goto fail;
- b = bus_new();
- if (!b)
- return -ENOMEM;
+ *ret = b;
+ return 0;
- b->send_hello = true;
+fail:
+ bus_free(b);
+ return r;
+}
- b->sockaddr.un.sun_family = AF_UNIX;
- memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4);
- b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4;
+_public_ int sd_bus_open_user(sd_bus **ret) {
+ const char *e;
+ sd_bus *b;
+ size_t l;
+ int r;
- r = bus_start_connect(b);
- if (r < 0) {
- bus_free(b);
+ assert_return(ret, -EINVAL);
+
+ r = sd_bus_new(&b);
+ if (r < 0)
return r;
+
+ e = secure_getenv("DBUS_SESSION_BUS_ADDRESS");
+ if (e) {
+ r = sd_bus_set_address(b, e);
+ if (r < 0)
+ goto fail;
+ } else {
+ e = secure_getenv("XDG_RUNTIME_DIR");
+ if (!e) {
+ r = -ENOENT;
+ goto fail;
+ }
+
+ l = strlen(e);
+ if (l + 4 > sizeof(b->sockaddr.un.sun_path)) {
+ r = -E2BIG;
+ goto fail;
+ }
+
+ b->sockaddr.un.sun_family = AF_UNIX;
+ memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4);
+ b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4;
}
+ b->bus_client = true;
+
+ r = sd_bus_start(b);
+ if (r < 0)
+ goto fail;
+
*ret = b;
return 0;
+
+fail:
+ bus_free(b);
+ return r;
}
-int sd_bus_open_address(const char *address, sd_bus **ret) {
- sd_bus *b;
+_public_ int sd_bus_open_system_remote(const char *host, sd_bus **ret) {
+ _cleanup_free_ char *e = NULL;
+ char *p = NULL;
+ sd_bus *bus;
int r;
- if (!address)
- return -EINVAL;
- if (!ret)
- return -EINVAL;
+ assert_return(host, -EINVAL);
+ assert_return(ret, -EINVAL);
- b = bus_new();
- if (!b)
+ e = bus_address_escape(host);
+ if (!e)
return -ENOMEM;
- b->address = strdup(address);
- if (!b->address) {
- bus_free(b);
+ p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL);
+ if (!p)
return -ENOMEM;
+
+ r = sd_bus_new(&bus);
+ if (r < 0) {
+ free(p);
+ return r;
}
- r = bus_start_connect(b);
+ bus->address = p;
+ bus->bus_client = true;
+
+ r = sd_bus_start(bus);
if (r < 0) {
- bus_free(b);
+ bus_free(bus);
return r;
}
- *ret = b;
+ *ret = bus;
return 0;
}
-int sd_bus_open_fd(int fd, sd_bus **ret) {
- sd_bus *b;
+_public_ int sd_bus_open_system_container(const char *machine, sd_bus **ret) {
+ _cleanup_free_ char *e = NULL;
+ sd_bus *bus;
+ char *p;
int r;
- if (fd < 0)
- return -EINVAL;
- if (!ret)
- return -EINVAL;
+ assert_return(machine, -EINVAL);
+ assert_return(ret, -EINVAL);
+
+ e = bus_address_escape(machine);
+ if (!e)
+ return -ENOMEM;
- b = bus_new();
- if (!b)
+ p = strjoin("x-container:machine=", e, NULL);
+ if (!p)
return -ENOMEM;
- b->fd = fd;
- fd_nonblock(b->fd, true);
- fd_cloexec(b->fd, true);
+ r = sd_bus_new(&bus);
+ if (r < 0) {
+ free(p);
+ return r;
+ }
+
+ bus->address = p;
+ bus->bus_client = true;
- r = bus_start_auth(b);
+ r = sd_bus_start(bus);
if (r < 0) {
- bus_free(b);
+ bus_free(bus);
return r;
}
- *ret = b;
+ *ret = bus;
return 0;
}
-void sd_bus_close(sd_bus *bus) {
+_public_ void sd_bus_close(sd_bus *bus) {
if (!bus)
return;
- if (bus->fd < 0)
+ if (bus->state == BUS_CLOSED)
+ return;
+ if (bus_pid_changed(bus))
return;
- close_nointr_nofail(bus->fd);
- bus->fd = -1;
+ bus->state = BUS_CLOSED;
+
+ sd_bus_detach_event(bus);
+
+ if (!bus->is_kernel)
+ bus_close_fds(bus);
+
+ /* We'll leave the fd open in case this is a kernel bus, since
+ * there might still be memblocks around that reference this
+ * bus, and they might need to invoke the
+ * KDBUS_CMD_MSG_RELEASE ioctl on the fd when they are
+ * freed. */
}
-sd_bus *sd_bus_ref(sd_bus *bus) {
- if (!bus)
- return NULL;
+_public_ sd_bus *sd_bus_ref(sd_bus *bus) {
+ assert_return(bus, NULL);
- assert(bus->n_ref > 0);
+ assert_se(REFCNT_INC(bus->n_ref) >= 2);
- bus->n_ref++;
return bus;
}
-sd_bus *sd_bus_unref(sd_bus *bus) {
- if (!bus)
- return NULL;
-
- assert(bus->n_ref > 0);
- bus->n_ref--;
+_public_ sd_bus *sd_bus_unref(sd_bus *bus) {
+ assert_return(bus, NULL);
- if (bus->n_ref <= 0)
+ if (REFCNT_DEC(bus->n_ref) <= 0)
bus_free(bus);
return NULL;
}
-int sd_bus_is_running(sd_bus *bus) {
- if (!bus)
- return -EINVAL;
+_public_ int sd_bus_is_open(sd_bus *bus) {
- if (bus->fd < 0)
- return -ENOTCONN;
+ assert_return(bus, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- return bus->state == BUS_RUNNING;
+ return BUS_IS_OPEN(bus->state);
}
-int sd_bus_can_send(sd_bus *bus, char type) {
+_public_ int sd_bus_can_send(sd_bus *bus, char type) {
+ int r;
- if (!bus)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state != BUS_UNSET, -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ if (type == SD_BUS_TYPE_UNIX_FD) {
+ if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD))
+ return 0;
+
+ r = bus_ensure_running(bus);
+ if (r < 0)
+ return r;
- if (type == SD_BUS_TYPE_UNIX_FD)
return bus->can_fds;
+ }
return bus_type_is_valid(type);
}
+_public_ int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) {
+ int r;
+
+ assert_return(bus, -EINVAL);
+ assert_return(server_id, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ r = bus_ensure_running(bus);
+ if (r < 0)
+ return r;
+
+ *server_id = bus->server_id;
+ return 0;
+}
+
static int bus_seal_message(sd_bus *b, sd_bus_message *m) {
assert(m);
- if (m->sealed)
+ if (m->header->version > b->message_version)
+ return -EPERM;
+
+ if (m->sealed) {
+ /* If we copy the same message to multiple
+ * destinations, avoid using the same serial
+ * numbers. */
+ b->serial = MAX(b->serial, BUS_MESSAGE_SERIAL(m));
return 0;
+ }
return bus_message_seal(m, ++b->serial);
}
-static int message_write(sd_bus *bus, sd_bus_message *m, size_t *idx) {
- struct msghdr mh;
- struct iovec *iov;
- ssize_t k;
- size_t n;
- unsigned j;
+static int dispatch_wqueue(sd_bus *bus) {
+ int r, ret = 0;
assert(bus);
- assert(m);
- assert(idx);
-
- n = m->n_iovec * sizeof(struct iovec);
- iov = alloca(n);
- memcpy(iov, m->iovec, n);
-
- j = 0;
- iovec_advance(iov, &j, *idx);
-
- zero(mh);
- mh.msg_iov = iov;
- mh.msg_iovlen = m->n_iovec;
-
- k = sendmsg(bus->fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
- if (k < 0)
- return -errno;
-
- *idx += (size_t) k;
- iovec_advance(iov, &j, *idx);
-
- return j > m->n_iovec;
-}
-
-static int message_read_need(sd_bus *bus, size_t *need) {
- uint32_t a, b;
- uint8_t e;
-
- assert(bus);
- assert(need);
-
- if (bus->rbuffer_size <= sizeof(struct bus_header)) {
- *need = sizeof(struct bus_header);
- return 0;
- }
-
- a = ((const uint32_t*) bus->rbuffer)[1];
- b = ((const uint32_t*) bus->rbuffer)[3];
-
- e = ((const uint8_t*) bus->rbuffer)[0];
- if (e == SD_BUS_LITTLE_ENDIAN) {
- a = le32toh(a);
- b = le32toh(b);
- } else if (e == SD_BUS_BIG_ENDIAN) {
- a = be32toh(a);
- b = be32toh(b);
- } else
- return -EIO;
-
- *need = sizeof(struct bus_header) + ALIGN_TO(a, 8) + b;
- return 0;
-}
-
-static int message_make(sd_bus *bus, size_t size, sd_bus_message **m) {
- sd_bus_message *t;
- void *b = NULL;
- int r;
-
- assert(bus);
- assert(m);
- assert(bus->rbuffer_size >= size);
-
- t = new0(sd_bus_message, 1);
- if (!t)
- return -ENOMEM;
-
- if (bus->rbuffer_size > size) {
- b = memdup((const uint8_t*) bus->rbuffer + size, bus->rbuffer_size - size);
- if (!b) {
- free(t);
- return -ENOMEM;
- }
- }
-
- t->n_ref = 1;
-
- t->header = bus->rbuffer;
- t->free_header = true;
-
- t->fields = (uint8_t*) bus->rbuffer + sizeof(struct bus_header);
- t->body = (uint8_t*) bus->rbuffer + sizeof(struct bus_header) + ALIGN_TO(BUS_MESSAGE_BODY_SIZE(t), 8);
-
- bus->rbuffer = b;
- bus->rbuffer_size -= size;
-
- r = bus_message_parse(t);
- if (r < 0) {
- sd_bus_message_unref(t);
- return r;
- }
-
- *m = t;
- return 1;
-}
-
-static int message_read(sd_bus *bus, sd_bus_message **m) {
- struct msghdr mh;
- struct iovec iov;
- ssize_t k;
- size_t need;
- int r;
- void *b;
-
- assert(bus);
- assert(m);
-
- r = message_read_need(bus, &need);
- if (r < 0)
- return r;
-
- if (bus->rbuffer_size >= need)
- return message_make(bus, need, m);
-
- b = realloc(bus->rbuffer, need);
- if (!b)
- return -ENOMEM;
-
- zero(iov);
- iov.iov_base = (uint8_t*) bus->rbuffer + bus->rbuffer_size;
- iov.iov_len = need - bus->rbuffer_size;
-
- zero(mh);
- mh.msg_iov = &iov;
- mh.msg_iovlen = 1;
-
- k = recvmsg(bus->fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
- if (k < 0)
- return errno == EAGAIN ? 0 : -errno;
-
- bus->rbuffer_size += k;
-
- r = message_read_need(bus, &need);
- if (r < 0)
- return r;
-
- if (bus->rbuffer_size >= need)
- return message_make(bus, need, m);
-
- return 0;
-}
-
-static int dispatch_wqueue(sd_bus *bus) {
- int r, c = 0;
-
- assert(bus);
-
- if (bus->fd < 0)
- return -ENOTCONN;
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
while (bus->wqueue_size > 0) {
- r = message_write(bus, bus->wqueue[0], &bus->windex);
+ if (bus->is_kernel)
+ r = bus_kernel_write_message(bus, bus->wqueue[0]);
+ else
+ r = bus_socket_write_message(bus, bus->wqueue[0], &bus->windex);
+
if (r < 0) {
sd_bus_close(bus);
return r;
} else if (r == 0)
- /* Wasn't fully written yet... */
- break;
- else {
+ /* Didn't do anything this time */
+ return ret;
+ else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) {
/* Fully written. Let's drop the entry from
* the queue.
*
memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size);
bus->windex = 0;
- c++;
+ ret = 1;
}
}
- return c;
+ return ret;
}
static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) {
- int r;
+ sd_bus_message *z = NULL;
+ int r, ret = 0;
assert(bus);
assert(m);
-
- if (bus->fd < 0)
- return -ENOTCONN;
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
if (bus->rqueue_size > 0) {
/* Dispatch a queued message */
}
/* Try to read a new message */
- r = message_read(bus, m);
- if (r < 0) {
- sd_bus_close(bus);
- return r;
- }
+ do {
+ if (bus->is_kernel)
+ r = bus_kernel_read_message(bus, &z);
+ else
+ r = bus_socket_read_message(bus, &z);
- return r;
+ if (r < 0) {
+ sd_bus_close(bus);
+ return r;
+ }
+ if (r == 0)
+ return ret;
+
+ ret = 1;
+ } while (!z);
+
+ *m = z;
+ return ret;
}
-int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
+_public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
int r;
- if (!bus)
- return -EINVAL;
- if (bus->fd < 0)
- return -ENOTCONN;
- if (!m)
- return -EINVAL;
- if (m->header->version > bus->message_version)
- return -EPERM;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(m, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ if (m->n_fds > 0) {
+ r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -ENOTSUP;
+ }
+
+ /* If the serial number isn't kept, then we know that no reply
+ * is expected */
+ if (!serial && !m->sealed)
+ m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
r = bus_seal_message(bus, m);
if (r < 0)
/* If this is a reply and no reply was requested, then let's
* suppress this, if we can */
if (m->dont_send && !serial)
- return 0;
+ return 1;
- if (bus->wqueue_size <= 0) {
+ if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) {
size_t idx = 0;
- r = message_write(bus, m, &idx);
+ if (bus->is_kernel)
+ r = bus_kernel_write_message(bus, m);
+ else
+ r = bus_socket_write_message(bus, m, &idx);
+
if (r < 0) {
sd_bus_close(bus);
return r;
- } else if (r == 0) {
+ } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) {
/* Wasn't fully written. So let's remember how
* much was written. Note that the first entry
* of the wqueue array is always allocated so
/* Just append it to the queue. */
- if (bus->wqueue_size >= WQUEUE_MAX)
+ if (bus->wqueue_size >= BUS_WQUEUE_MAX)
return -ENOBUFS;
q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1));
if (serial)
*serial = BUS_MESSAGE_SERIAL(m);
- return 0;
+ return 1;
}
static usec_t calc_elapse(uint64_t usec) {
return 0;
if (usec == 0)
- usec = SD_BUS_DEFAULT_TIMEOUT;
+ usec = BUS_DEFAULT_TIMEOUT;
return now(CLOCK_MONOTONIC) + usec;
}
-int sd_bus_send_with_reply(
+static int timeout_compare(const void *a, const void *b) {
+ const struct reply_callback *x = a, *y = b;
+
+ if (x->timeout != 0 && y->timeout == 0)
+ return -1;
+
+ if (x->timeout == 0 && y->timeout != 0)
+ return 1;
+
+ if (x->timeout < y->timeout)
+ return -1;
+
+ if (x->timeout > y->timeout)
+ return 1;
+
+ return 0;
+}
+
+_public_ int sd_bus_call_async(
sd_bus *bus,
sd_bus_message *m,
- sd_message_handler_t callback,
+ sd_bus_message_handler_t callback,
void *userdata,
uint64_t usec,
uint64_t *serial) {
struct reply_callback *c;
int r;
- if (!bus)
- return -EINVAL;
- if (!bus->fd < 0)
- return -ENOTCONN;
- if (!m)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (!m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(m, -EINVAL);
+ assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL);
+ assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL);
+ assert_return(callback, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func);
+ if (r < 0)
+ return r;
+
+ if (usec != (uint64_t) -1) {
+ r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare);
+ if (r < 0)
+ return r;
+ }
r = bus_seal_message(bus, m);
if (r < 0)
return r;
- c = new(struct reply_callback, 1);
+ c = new0(struct reply_callback, 1);
if (!c)
return -ENOMEM;
return r;
}
+ if (c->timeout != 0) {
+ r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx);
+ if (r < 0) {
+ c->timeout = 0;
+ sd_bus_call_async_cancel(bus, c->serial);
+ return r;
+ }
+ }
+
r = sd_bus_send(bus, m, serial);
if (r < 0) {
- hashmap_remove(bus->reply_callbacks, &c->serial);
- free(c);
+ sd_bus_call_async_cancel(bus, c->serial);
return r;
}
return r;
}
-int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) {
- struct reply_callbacks *c;
+_public_ int sd_bus_call_async_cancel(sd_bus *bus, uint64_t serial) {
+ struct reply_callback *c;
- if (!bus)
- return -EINVAL;
- if (serial == 0)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(serial != 0, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
c = hashmap_remove(bus->reply_callbacks, &serial);
if (!c)
return 0;
+ if (c->timeout != 0)
+ prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx);
+
free(c);
return 1;
}
-int sd_bus_send_with_reply_and_block(
+int bus_ensure_running(sd_bus *bus) {
+ int r;
+
+ assert(bus);
+
+ if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED)
+ return -ENOTCONN;
+ if (bus->state == BUS_RUNNING)
+ return 1;
+
+ for (;;) {
+ r = sd_bus_process(bus, NULL);
+ if (r < 0)
+ return r;
+ if (bus->state == BUS_RUNNING)
+ return 1;
+ if (r > 0)
+ continue;
+
+ r = sd_bus_wait(bus, (uint64_t) -1);
+ if (r < 0)
+ return r;
+ }
+}
+
+_public_ int sd_bus_call(
sd_bus *bus,
sd_bus_message *m,
uint64_t usec,
uint64_t serial;
bool room = false;
- if (!bus)
- return -EINVAL;
- if (!bus->fd < 0)
- return -ENOTCONN;
- if (!m)
- return -EINVAL;
- if (!m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return -EINVAL;
- if (sd_bus_error_is_set(error))
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(m, -EINVAL);
+ assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL);
+ assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL);
+ assert_return(!bus_error_is_dirty(error), -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ r = bus_ensure_running(bus);
+ if (r < 0)
+ return r;
r = sd_bus_send(bus, m, &serial);
if (r < 0)
for (;;) {
usec_t left;
- sd_bus_message *incoming;
+ sd_bus_message *incoming = NULL;
if (!room) {
sd_bus_message **q;
+ if (bus->rqueue_size >= BUS_RQUEUE_MAX)
+ return -ENOBUFS;
+
/* Make sure there's room for queuing this
* locally, before we read the message */
room = true;
}
- r = message_read(bus, &incoming);
+ if (bus->is_kernel)
+ r = bus_kernel_read_message(bus, &incoming);
+ else
+ r = bus_socket_read_message(bus, &incoming);
if (r < 0)
return r;
- if (r > 0) {
+ if (incoming) {
+
if (incoming->reply_serial == serial) {
/* Found a match! */
- if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_RETURN) {
- *reply = incoming;
- return 0;
+ if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) {
+
+ if (reply)
+ *reply = incoming;
+ else
+ sd_bus_message_unref(incoming);
+
+ return 1;
}
- if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_ERROR) {
+ if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) {
int k;
r = sd_bus_error_copy(error, &incoming->error);
return r;
}
- k = bus_error_to_errno(&incoming->error);
+ k = sd_bus_error_get_errno(&incoming->error);
sd_bus_message_unref(incoming);
- return k;
+ return -k;
}
sd_bus_message_unref(incoming);
return -EIO;
+
+ } else if (incoming->header->serial == serial &&
+ bus->unique_name &&
+ incoming->sender &&
+ streq(bus->unique_name, incoming->sender)) {
+
+ /* Our own message? Somebody is trying
+ * to send its own client a message,
+ * let's not dead-lock, let's fail
+ * immediately. */
+
+ sd_bus_message_unref(incoming);
+ return -ELOOP;
}
/* There's already guaranteed to be room for
/* Try to read more, right-away */
continue;
}
+ if (r != 0)
+ continue;
if (timeout > 0) {
usec_t n;
} else
left = (uint64_t) -1;
- r = sd_bus_wait(bus, left);
+ r = bus_poll(bus, true, left);
if (r < 0)
return r;
}
}
-int sd_bus_get_fd(sd_bus *bus) {
- if (!bus)
- return -EINVAL;
+_public_ int sd_bus_get_fd(sd_bus *bus) {
- if (bus->fd < 0)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(bus->input_fd == bus->output_fd, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- return bus->fd;
+ return bus->input_fd;
}
-int sd_bus_get_events(sd_bus *bus) {
+_public_ int sd_bus_get_events(sd_bus *bus) {
int flags = 0;
- if (!bus)
- return -EINVAL;
-
- if (bus->fd < 0)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
if (bus->state == BUS_OPENING)
flags |= POLLOUT;
- else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) {
+ else if (bus->state == BUS_AUTHENTICATING) {
+
+ if (bus_socket_auth_needs_write(bus))
+ flags |= POLLOUT;
+
+ flags |= POLLIN;
+
+ } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) {
if (bus->rqueue_size <= 0)
flags |= POLLIN;
if (bus->wqueue_size > 0)
return flags;
}
-int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
- sd_bus_message *m;
- int r;
+_public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) {
+ struct reply_callback *c;
- if (!bus)
- return -EINVAL;
- if (bus->fd < 0)
- return -ENOTCONN;
+ assert_return(bus, -EINVAL);
+ assert_return(timeout_usec, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- if (bus->state == BUS_OPENING) {
- struct pollfd p;
+ if (bus->state == BUS_AUTHENTICATING) {
+ *timeout_usec = bus->auth_timeout;
+ return 1;
+ }
- zero(p);
- p.fd = bus->fd;
- p.events = POLLOUT;
+ if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) {
+ *timeout_usec = (uint64_t) -1;
+ return 0;
+ }
- r = poll(&p, 1, 0);
- if (r < 0)
- return -errno;
+ if (bus->rqueue_size > 0) {
+ *timeout_usec = 0;
+ return 1;
+ }
- if (p.revents & (POLLOUT|POLLERR|POLLHUP)) {
- int error;
- socklen_t slen = sizeof(error);
+ c = prioq_peek(bus->reply_callbacks_prioq);
+ if (!c) {
+ *timeout_usec = (uint64_t) -1;
+ return 0;
+ }
- r = getsockopt(bus->fd, SOL_SOCKET, SO_ERROR, &error, &slen);
- if (r < 0)
- return -errno;
+ *timeout_usec = c->timeout;
+ return 1;
+}
- if (error != 0)
- bus->last_connect_error = -error;
- else if (p.revents & (POLLERR|POLLHUP))
- bus->last_connect_error = -ECONNREFUSED;
- else
- return bus_start_auth(bus);
+static int process_timeout(sd_bus *bus) {
+ _cleanup_bus_message_unref_ sd_bus_message* m = NULL;
+ struct reply_callback *c;
+ usec_t n;
+ int r;
- /* Try next address */
- return bus_start_connect(bus);
- }
+ assert(bus);
+ c = prioq_peek(bus->reply_callbacks_prioq);
+ if (!c)
return 0;
- } else if (bus->state == BUS_AUTHENTICATING) {
+ n = now(CLOCK_MONOTONIC);
+ if (c->timeout > n)
+ return 0;
- r = bus_write_auth(bus);
- if (r < 0)
- return r;
+ r = bus_message_new_synthetic_error(
+ bus,
+ c->serial,
+ &SD_BUS_ERROR_MAKE(SD_BUS_ERROR_NO_REPLY, "Method call timed out"),
+ &m);
+ if (r < 0)
+ return r;
- r = bus_read_auth(bus);
- if (r <= 0)
- return r;
+ assert_se(prioq_pop(bus->reply_callbacks_prioq) == c);
+ hashmap_remove(bus->reply_callbacks, &c->serial);
- return bus_start_running(bus);
+ r = c->callback(bus, m, c->userdata);
+ free(c);
- } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) {
- struct filter_callback *l;
+ return r < 0 ? r : 1;
+}
- r = dispatch_wqueue(bus);
- if (r < 0)
- return r;
+static int process_hello(sd_bus *bus, sd_bus_message *m) {
+ assert(bus);
+ assert(m);
- r = dispatch_rqueue(bus, &m);
- if (r <= 0)
- return r;
+ if (bus->state != BUS_HELLO)
+ return 0;
- if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL || m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_RETURN) {
- struct reply_callback *c;
+ /* Let's make sure the first message on the bus is the HELLO
+ * reply. But note that we don't actually parse the message
+ * here (we leave that to the usual handling), we just verify
+ * we don't let any earlier msg through. */
- c = hashmap_remove(bus->reply_callbacks, &m->reply_serial);
- if (c) {
- r = c->callback(bus, m, c->userdata);
- free(c);
+ if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN &&
+ m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
+ return -EIO;
- if (r != 0) {
- sd_bus_message_unref(m);
- return r < 0 ? r : 0;
- }
- }
- }
+ if (m->reply_serial != bus->hello_serial)
+ return -EIO;
- LIST_FOREACH(callbacks, l, bus->filter_callbacks) {
- r = l->callback(bus, m, l->userdata);
- if (r != 0) {
- sd_bus_message_unref(m);
- return r < 0 ? r : 0;
- }
- }
+ return 0;
+}
- if (ret) {
- *ret = m;
- return 1;
- }
+static int process_reply(sd_bus *bus, sd_bus_message *m) {
+ struct reply_callback *c;
+ int r;
+
+ assert(bus);
+ assert(m);
- sd_bus_message_unref(m);
+ if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN &&
+ m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
return 0;
- }
- return -ENOTSUP;
-}
+ c = hashmap_remove(bus->reply_callbacks, &m->reply_serial);
+ if (!c)
+ return 0;
-int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
- struct pollfd p;
- int r, e;
- struct timespec ts;
+ if (c->timeout != 0)
+ prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx);
- if (!bus)
- return -EINVAL;
- if (bus->fd < 0)
- return -ECONNREFUSED;
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ r = c->callback(bus, m, c->userdata);
+ free(c);
+
+ return r;
+}
+
+static int process_filter(sd_bus *bus, sd_bus_message *m) {
+ struct filter_callback *l;
+ int r;
+
+ assert(bus);
+ assert(m);
+
+ do {
+ bus->filter_callbacks_modified = false;
+
+ LIST_FOREACH(callbacks, l, bus->filter_callbacks) {
+
+ if (bus->filter_callbacks_modified)
+ break;
+
+ /* Don't run this more than once per iteration */
+ if (l->last_iteration == bus->iteration_counter)
+ continue;
+
+ l->last_iteration = bus->iteration_counter;
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ r = l->callback(bus, m, l->userdata);
+ if (r != 0)
+ return r;
+
+ }
+
+ } while (bus->filter_callbacks_modified);
+
+ return 0;
+}
+
+static int process_match(sd_bus *bus, sd_bus_message *m) {
+ int r;
+
+ assert(bus);
+ assert(m);
+
+ do {
+ bus->match_callbacks_modified = false;
+
+ r = bus_match_run(bus, &bus->match_callbacks, m);
+ if (r != 0)
+ return r;
+
+ } while (bus->match_callbacks_modified);
+
+ return 0;
+}
+
+static int process_builtin(sd_bus *bus, sd_bus_message *m) {
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ int r;
+
+ assert(bus);
+ assert(m);
+
+ if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL)
+ return 0;
+
+ if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer"))
+ return 0;
+
+ if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return 1;
+
+ if (streq_ptr(m->member, "Ping"))
+ r = sd_bus_message_new_method_return(bus, m, &reply);
+ else if (streq_ptr(m->member, "GetMachineId")) {
+ sd_id128_t id;
+ char sid[33];
+
+ r = sd_id128_get_machine(&id);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_new_method_return(bus, m, &reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid));
+ } else {
+ r = sd_bus_message_new_method_errorf(
+ bus, m, &reply,
+ SD_BUS_ERROR_UNKNOWN_METHOD,
+ "Unknown method '%s' on interface '%s'.", m->member, m->interface);
+ }
+
+ if (r < 0)
+ return r;
+
+ r = sd_bus_send(bus, reply, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int process_message(sd_bus *bus, sd_bus_message *m) {
+ int r;
+
+ assert(bus);
+ assert(m);
+
+ bus->current = m;
+ bus->iteration_counter++;
+
+ log_debug("Got message sender=%s object=%s interface=%s member=%s",
+ strna(sd_bus_message_get_sender(m)),
+ strna(sd_bus_message_get_path(m)),
+ strna(sd_bus_message_get_interface(m)),
+ strna(sd_bus_message_get_member(m)));
+
+ r = process_hello(bus, m);
+ if (r != 0)
+ goto finish;
+
+ r = process_reply(bus, m);
+ if (r != 0)
+ goto finish;
+
+ r = process_filter(bus, m);
+ if (r != 0)
+ goto finish;
+
+ r = process_match(bus, m);
+ if (r != 0)
+ goto finish;
+
+ r = process_builtin(bus, m);
+ if (r != 0)
+ goto finish;
+
+ r = bus_process_object(bus, m);
+
+finish:
+ bus->current = NULL;
+ return r;
+}
+
+static int process_running(sd_bus *bus, sd_bus_message **ret) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ int r;
+
+ assert(bus);
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
+
+ r = process_timeout(bus);
+ if (r != 0)
+ goto null_message;
+
+ r = dispatch_wqueue(bus);
+ if (r != 0)
+ goto null_message;
+
+ r = dispatch_rqueue(bus, &m);
+ if (r < 0)
+ return r;
+ if (!m)
+ goto null_message;
+
+ r = process_message(bus, m);
+ if (r != 0)
+ goto null_message;
+
+ if (ret) {
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ *ret = m;
+ m = NULL;
+ return 1;
+ }
+
+ if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) {
+
+ r = sd_bus_reply_method_errorf(
+ bus, m,
+ SD_BUS_ERROR_UNKNOWN_OBJECT,
+ "Unknown object '%s'.", m->path);
+ if (r < 0)
+ return r;
+ }
+
+ return 1;
+
+null_message:
+ if (r >= 0 && ret)
+ *ret = NULL;
+
+ return r;
+}
+
+_public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
+ BUS_DONT_DESTROY(bus);
+ int r;
+
+ /* Returns 0 when we didn't do anything. This should cause the
+ * caller to invoke sd_bus_wait() before returning the next
+ * time. Returns > 0 when we did something, which possibly
+ * means *ret is filled in with an unprocessed message. */
+
+ assert_return(bus, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ /* We don't allow recursively invoking sd_bus_process(). */
+ assert_return(!bus->processing, -EBUSY);
+
+ switch (bus->state) {
+
+ case BUS_UNSET:
+ case BUS_CLOSED:
+ return -ENOTCONN;
+
+ case BUS_OPENING:
+ r = bus_socket_process_opening(bus);
+ if (r < 0)
+ return r;
+ if (ret)
+ *ret = NULL;
+ return r;
+
+ case BUS_AUTHENTICATING:
+
+ r = bus_socket_process_authenticating(bus);
+ if (r < 0)
+ return r;
+ if (ret)
+ *ret = NULL;
+ return r;
+
+ case BUS_RUNNING:
+ case BUS_HELLO:
+
+ bus->processing = true;
+ r = process_running(bus, ret);
+ bus->processing = false;
+
+ return r;
+ }
+
+ assert_not_reached("Unknown state");
+}
+
+static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) {
+ struct pollfd p[2] = {};
+ int r, e, n;
+ struct timespec ts;
+ usec_t m = (usec_t) -1;
+
+ assert(bus);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
e = sd_bus_get_events(bus);
if (e < 0)
return e;
- zero(p);
- p.fd = bus->fd;
- p.events = e;
+ if (need_more)
+ /* The caller really needs some more data, he doesn't
+ * care about what's already read, or any timeouts
+ * except its own.*/
+ e |= POLLIN;
+ else {
+ usec_t until;
+ /* The caller wants to process if there's something to
+ * process, but doesn't care otherwise */
+
+ r = sd_bus_get_timeout(bus, &until);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ usec_t nw;
+ nw = now(CLOCK_MONOTONIC);
+ m = until > nw ? until - nw : 0;
+ }
+ }
+
+ if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m))
+ m = timeout_usec;
+
+ p[0].fd = bus->input_fd;
+ if (bus->output_fd == bus->input_fd) {
+ p[0].events = e;
+ n = 1;
+ } else {
+ p[0].events = e & POLLIN;
+ p[1].fd = bus->output_fd;
+ p[1].events = e & POLLOUT;
+ n = 2;
+ }
- r = ppoll(&p, 1, timeout_usec == (uint64_t) -1 ? NULL : timespec_store(&ts, timeout_usec), NULL);
+ r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL);
if (r < 0)
- return -EINVAL;
+ return -errno;
- return r;
+ return r > 0 ? 1 : 0;
+}
+
+_public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
+
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ if (bus->rqueue_size > 0)
+ return 0;
+
+ return bus_poll(bus, false, timeout_usec);
}
-int sd_bus_flush(sd_bus *bus) {
+_public_ int sd_bus_flush(sd_bus *bus) {
int r;
- if (!bus)
- return -EINVAL;
- if (bus->fd < 0)
- return -ENOTCONN;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ r = bus_ensure_running(bus);
+ if (r < 0)
+ return r;
- if (bus->state == BUS_RUNNING && bus->wqueue_size <= 0)
+ if (bus->wqueue_size <= 0)
return 0;
for (;;) {
if (r < 0)
return r;
- if (bus->state == BUS_RUNNING && bus->wqueue_size <= 0)
+ if (bus->wqueue_size <= 0)
return 0;
- r = sd_bus_wait(bus, (uint64_t) -1);
+ r = bus_poll(bus, false, (uint64_t) -1);
if (r < 0)
return r;
}
}
-int sd_bus_add_filter(sd_bus *bus, sd_message_handler_t callback, void *userdata) {
+_public_ int sd_bus_add_filter(sd_bus *bus,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
struct filter_callback *f;
- if (!bus)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(callback, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- f = new(struct filter_callback, 1);
+ f = new0(struct filter_callback, 1);
if (!f)
return -ENOMEM;
f->callback = callback;
f->userdata = userdata;
- LIST_PREPEND(struct filter_callback, callbacks, bus->filter_callbacks, f);
+ bus->filter_callbacks_modified = true;
+ LIST_PREPEND(callbacks, bus->filter_callbacks, f);
return 0;
}
-int sd_bus_remove_filter(sd_bus *bus, sd_message_handler_t callback, void *userdata) {
+_public_ int sd_bus_remove_filter(sd_bus *bus,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
struct filter_callback *f;
- if (!bus)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(callback, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
LIST_FOREACH(callbacks, f, bus->filter_callbacks) {
if (f->callback == callback && f->userdata == userdata) {
- LIST_REMOVE(struct filter_callback, callbacks, bus->filter_callbacks, f);
+ bus->filter_callbacks_modified = true;
+ LIST_REMOVE(callbacks, bus->filter_callbacks, f);
free(f);
return 1;
}
return 0;
}
+
+_public_ int sd_bus_add_match(sd_bus *bus,
+ const char *match,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
+ struct bus_match_component *components = NULL;
+ unsigned n_components = 0;
+ uint64_t cookie = 0;
+ int r = 0;
+
+ assert_return(bus, -EINVAL);
+ assert_return(match, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ r = bus_match_parse(match, &components, &n_components);
+ if (r < 0)
+ goto finish;
+
+ if (bus->bus_client) {
+ cookie = ++bus->match_cookie;
+
+ r = bus_add_match_internal(bus, match, components, n_components, cookie);
+ if (r < 0)
+ goto finish;
+ }
+
+ bus->match_callbacks_modified = true;
+ r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL);
+ if (r < 0) {
+ if (bus->bus_client)
+ bus_remove_match_internal(bus, match, cookie);
+ }
+
+finish:
+ bus_match_parse_free(components, n_components);
+ return r;
+}
+
+_public_ int sd_bus_remove_match(sd_bus *bus,
+ const char *match,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
+ struct bus_match_component *components = NULL;
+ unsigned n_components = 0;
+ int r = 0, q = 0;
+ uint64_t cookie = 0;
+
+ assert_return(bus, -EINVAL);
+ assert_return(match, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ r = bus_match_parse(match, &components, &n_components);
+ if (r < 0)
+ return r;
+
+ bus->match_callbacks_modified = true;
+ r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie);
+
+ if (bus->bus_client)
+ q = bus_remove_match_internal(bus, match, cookie);
+
+ bus_match_parse_free(components, n_components);
+
+ return r < 0 ? r : q;
+}
+
+bool bus_pid_changed(sd_bus *bus) {
+ assert(bus);
+
+ /* We don't support people creating a bus connection and
+ * keeping it around over a fork(). Let's complain. */
+
+ return bus->original_pid != getpid();
+}
+
+static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ sd_bus *bus = userdata;
+ int r;
+
+ assert(bus);
+
+ r = sd_bus_process(bus, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) {
+ sd_bus *bus = userdata;
+ int r;
+
+ assert(bus);
+
+ r = sd_bus_process(bus, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int prepare_callback(sd_event_source *s, void *userdata) {
+ sd_bus *bus = userdata;
+ int r, e;
+ usec_t until;
+
+ assert(s);
+ assert(bus);
+
+ e = sd_bus_get_events(bus);
+ if (e < 0)
+ return e;
+
+ if (bus->output_fd != bus->input_fd) {
+
+ r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT);
+ if (r < 0)
+ return r;
+ } else {
+ r = sd_event_source_set_io_events(bus->input_io_event_source, e);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_get_timeout(bus, &until);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ int j;
+
+ j = sd_event_source_set_time(bus->time_event_source, until);
+ if (j < 0)
+ return j;
+ }
+
+ r = sd_event_source_set_enabled(bus->time_event_source, r > 0);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int quit_callback(sd_event_source *event, void *userdata) {
+ sd_bus *bus = userdata;
+
+ assert(event);
+
+ sd_bus_flush(bus);
+
+ return 1;
+}
+
+_public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) {
+ int r;
+
+ assert_return(bus, -EINVAL);
+ assert_return(!bus->event, -EBUSY);
+
+ assert(!bus->input_io_event_source);
+ assert(!bus->output_io_event_source);
+ assert(!bus->time_event_source);
+
+ if (event)
+ bus->event = sd_event_ref(event);
+ else {
+ r = sd_event_default(&bus->event);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_event_add_io(bus->event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_source_set_priority(bus->input_io_event_source, priority);
+ if (r < 0)
+ goto fail;
+
+ if (bus->output_fd != bus->input_fd) {
+ r = sd_event_add_io(bus->event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_source_set_priority(bus->output_io_event_source, priority);
+ if (r < 0)
+ goto fail;
+ }
+
+ r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_source_set_priority(bus->time_event_source, priority);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_add_quit(bus->event, quit_callback, bus, &bus->quit_event_source);
+ if (r < 0)
+ goto fail;
+
+ return 0;
+
+fail:
+ sd_bus_detach_event(bus);
+ return r;
+}
+
+_public_ int sd_bus_detach_event(sd_bus *bus) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->event, -ENXIO);
+
+ if (bus->input_io_event_source)
+ bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source);
+
+ if (bus->output_io_event_source)
+ bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source);
+
+ if (bus->time_event_source)
+ bus->time_event_source = sd_event_source_unref(bus->time_event_source);
+
+ if (bus->quit_event_source)
+ bus->quit_event_source = sd_event_source_unref(bus->quit_event_source);
+
+ if (bus->event)
+ bus->event = sd_event_unref(bus->event);
+
+ return 0;
+}
+
+_public_ sd_bus_message* sd_bus_get_current(sd_bus *bus) {
+ assert_return(bus, NULL);
+
+ return bus->current;
+}
+
+static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) {
+ sd_bus *b = NULL;
+ int r;
+
+ assert(bus_open);
+ assert(default_bus);
+
+ if (!ret)
+ return !!*default_bus;
+
+ if (*default_bus) {
+ *ret = sd_bus_ref(*default_bus);
+ return 0;
+ }
+
+ r = bus_open(&b);
+ if (r < 0)
+ return r;
+
+ b->default_bus_ptr = default_bus;
+ b->tid = gettid();
+ *default_bus = b;
+
+ *ret = b;
+ return 1;
+}
+
+_public_ int sd_bus_default_system(sd_bus **ret) {
+ static __thread sd_bus *default_system_bus = NULL;
+
+ return bus_default(sd_bus_open_system, &default_system_bus, ret);
+}
+
+_public_ int sd_bus_default_user(sd_bus **ret) {
+ static __thread sd_bus *default_user_bus = NULL;
+
+ return bus_default(sd_bus_open_user, &default_user_bus, ret);
+}
+
+_public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) {
+ assert_return(b, -EINVAL);
+ assert_return(tid, -EINVAL);
+ assert_return(!bus_pid_changed(b), -ECHILD);
+
+ if (b->tid != 0) {
+ *tid = b->tid;
+ return 0;
+ }
+
+ if (b->event)
+ return sd_event_get_tid(b->event, tid);
+
+ return -ENXIO;
+}
~ianmdlvl / elogind.git / blobdiff