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path: root/src/libsystemd-bus/sd-bus.c
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Diffstat (limited to 'src/libsystemd-bus/sd-bus.c')
-rw-r--r--src/libsystemd-bus/sd-bus.c287
1 files changed, 190 insertions, 97 deletions
diff --git a/src/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c
index c5cbb5682d..f27d47cdea 100644
--- a/src/libsystemd-bus/sd-bus.c
+++ b/src/libsystemd-bus/sd-bus.c
@@ -39,6 +39,7 @@
static void bus_free(sd_bus *b) {
struct filter_callback *f;
+ unsigned i;
assert(b);
@@ -46,9 +47,17 @@ static void bus_free(sd_bus *b) {
close_nointr_nofail(b->fd);
free(b->rbuffer);
+ free(b->unique_name);
+ free(b->auth_uid);
+ free(b->address);
+
+ 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);
@@ -122,24 +131,19 @@ static int bus_send_hello(sd_bus *bus) {
if (r < 0)
return r;
- return 0;
+ bus->sent_hello = true;
+ return r;
}
static int bus_start_running(sd_bus *bus) {
- int r;
-
assert(bus);
- if (bus->send_hello) {
+ if (bus->sent_hello) {
bus->state = BUS_HELLO;
-
- r = bus_send_hello(bus);
- if (r < 0)
- return r;
+ return 0;
}
bus->state = BUS_RUNNING;
-
return 0;
}
@@ -154,7 +158,7 @@ static int parse_address_key(const char **p, const char *key, char **value) {
assert(value);
l = strlen(key);
- if (!strncmp(*p, key, l) != 0)
+ if (strncmp(*p, key, l) != 0)
return 0;
if ((*p)[l] != '=')
@@ -164,7 +168,7 @@ static int parse_address_key(const char **p, const char *key, char **value) {
return -EINVAL;
a = *p + l + 1;
- while (*a != ';' && *a != 0) {
+ while (*a != ',' && *a != 0) {
char c, *t;
if (*a == '%') {
@@ -182,12 +186,14 @@ static int parse_address_key(const char **p, const char *key, char **value) {
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;
@@ -197,6 +203,16 @@ static int parse_address_key(const char **p, const char *key, char **value) {
r[n++] = c;
}
+ if (!r) {
+ r = strdup("");
+ if (!r)
+ return -ENOMEM;
+ } else
+ r[n] = 0;
+
+ if (*a == ',')
+ a++;
+
*p = a;
*value = r;
return 1;
@@ -206,7 +222,10 @@ static void skip_address_key(const char **p) {
assert(p);
assert(*p);
- *p += strcspn(*p, ";");
+ *p += strcspn(*p, ",");
+
+ if (**p == ',')
+ (*p) ++;
}
static int bus_parse_next_address(sd_bus *b) {
@@ -231,7 +250,7 @@ static int bus_parse_next_address(sd_bus *b) {
_cleanup_free_ char *path = NULL, *abstract = NULL;
p = a + 5;
- while (*p != 0 && *p != ';') {
+ while (*p != 0) {
r = parse_address_key(&p, "guid", &guid);
if (r < 0)
return r;
@@ -272,13 +291,13 @@ static int bus_parse_next_address(sd_bus *b) {
} else if (abstract) {
size_t l;
- l = strlen(path);
+ 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, path, sizeof(b->sockaddr.un.sun_path)-1);
+ 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;
}
@@ -287,7 +306,7 @@ static int bus_parse_next_address(sd_bus *b) {
struct addrinfo hints, *result;
p = a + 4;
- while (*p != 0 && *p != ';') {
+ while (*p != 0) {
r = parse_address_key(&p, "guid", &guid);
if (r < 0)
return r;
@@ -409,7 +428,7 @@ static int bus_auth_verify(sd_bus *b) {
if (!e)
return 0;
- f = memmem(e, b->rbuffer_size - (e - (char*) b->rbuffer), "\r\n", 2);
+ f = memmem(e + 2, b->rbuffer_size - (e - (char*) b->rbuffer) - 2, "\r\n", 2);
if (!f)
return 0;
@@ -423,7 +442,7 @@ static int bus_auth_verify(sd_bus *b) {
int x, y;
x = unhexchar(((char*) b->rbuffer)[3 + i]);
- y = unhexchar(((char*) b->rbuffer)[3 + i + 2]);
+ y = unhexchar(((char*) b->rbuffer)[3 + i + 1]);
if (x < 0 || y < 0)
return -EINVAL;
@@ -446,6 +465,8 @@ static int bus_auth_verify(sd_bus *b) {
memmove(b->rbuffer, f + 2, b->rbuffer_size);
}
+ b->rbuffer_size = 0;
+
r = bus_start_running(b);
if (r < 0)
return r;
@@ -459,6 +480,7 @@ static int bus_read_auth(sd_bus *b) {
size_t n;
ssize_t k;
int r;
+ void *p;
assert(b);
@@ -467,6 +489,11 @@ static int bus_read_auth(sd_bus *b) {
return r;
n = MAX(3 + 32 + 2 + sizeof("AGREE_UNIX_FD") - 1 + 2, b->rbuffer_size * 2);
+ p = realloc(b->rbuffer, n);
+ if (!p)
+ return -ENOMEM;
+
+ b->rbuffer = p;
zero(iov);
iov.iov_base = (uint8_t*) b->rbuffer + b->rbuffer_size;
@@ -490,7 +517,7 @@ static int bus_read_auth(sd_bus *b) {
}
static int bus_start_auth(sd_bus *b) {
- static const char auth_prefix[] = "\0AUTH_EXTERNAL ";
+ static const char auth_prefix[] = "\0AUTH EXTERNAL ";
static const char auth_suffix[] = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
char text[20 + 1]; /* enough space for a 64bit integer plus NUL */
@@ -570,25 +597,25 @@ int sd_bus_open_system(sd_bus **ret) {
r = sd_bus_open_address(e, &b);
if (r < 0)
return r;
+ } else {
+ b = bus_new();
+ if (!b)
+ return -ENOMEM;
- b->send_hello = true;
- *ret = b;
- return r;
- }
-
- b = bus_new();
- if (!b)
- return -ENOMEM;
-
- b->send_hello = true;
+ 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;
- 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;
+ r = bus_start_connect(b);
+ if (r < 0) {
+ bus_free(b);
+ return r;
+ }
+ }
- r = bus_start_connect(b);
+ r = bus_send_hello(b);
if (r < 0) {
- bus_free(b);
+ sd_bus_unref(b);
return r;
}
@@ -610,33 +637,33 @@ int sd_bus_open_user(sd_bus **ret) {
r = sd_bus_open_address(e, &b);
if (r < 0)
return r;
+ } else {
+ e = getenv("XDG_RUNTIME_DIR");
+ if (!e)
+ return -ENOENT;
- b->send_hello = true;
- *ret = b;
- return r;
- }
-
- e = getenv("XDG_RUNTIME_DIR");
- if (!e)
- return -ENOENT;
-
- l = strlen(e);
- if (l + 4 > sizeof(b->sockaddr.un.sun_path))
- return -E2BIG;
+ l = strlen(e);
+ if (l + 4 > sizeof(b->sockaddr.un.sun_path))
+ return -E2BIG;
- b = bus_new();
- if (!b)
- return -ENOMEM;
+ b = bus_new();
+ if (!b)
+ return -ENOMEM;
- b->send_hello = true;
+ 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->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;
+ r = bus_start_connect(b);
+ if (r < 0) {
+ bus_free(b);
+ return r;
+ }
+ }
- r = bus_start_connect(b);
+ r = bus_send_hello(b);
if (r < 0) {
- bus_free(b);
+ sd_bus_unref(b);
return r;
}
@@ -747,6 +774,8 @@ int sd_bus_can_send(sd_bus *bus, char type) {
if (!bus)
return -EINVAL;
+ if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO)
+ return -EAGAIN;
if (type == SD_BUS_TYPE_UNIX_FD)
return bus->can_fds;
@@ -757,6 +786,9 @@ int sd_bus_can_send(sd_bus *bus, char type) {
static int bus_seal_message(sd_bus *b, sd_bus_message *m) {
assert(m);
+ if (m->header->version > b->message_version)
+ return -EPERM;
+
if (m->sealed)
return 0;
@@ -773,6 +805,7 @@ static int message_write(sd_bus *bus, sd_bus_message *m, size_t *idx) {
assert(bus);
assert(m);
assert(idx);
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
n = m->n_iovec * sizeof(struct iovec);
iov = alloca(n);
@@ -792,7 +825,7 @@ static int message_write(sd_bus *bus, sd_bus_message *m, size_t *idx) {
*idx += (size_t) k;
iovec_advance(iov, &j, *idx);
- return j > m->n_iovec;
+ return j >= m->n_iovec;
}
static int message_read_need(sd_bus *bus, size_t *need) {
@@ -801,8 +834,9 @@ static int message_read_need(sd_bus *bus, size_t *need) {
assert(bus);
assert(need);
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
- if (bus->rbuffer_size <= sizeof(struct bus_header)) {
+ if (bus->rbuffer_size < sizeof(struct bus_header)) {
*need = sizeof(struct bus_header);
return 0;
}
@@ -818,9 +852,9 @@ static int message_read_need(sd_bus *bus, size_t *need) {
a = be32toh(a);
b = be32toh(b);
} else
- return -EIO;
+ return -EBADMSG;
- *need = sizeof(struct bus_header) + ALIGN_TO(a, 8) + b;
+ *need = sizeof(struct bus_header) + ALIGN_TO(b, 8) + a;
return 0;
}
@@ -832,6 +866,7 @@ static int message_make(sd_bus *bus, size_t size, sd_bus_message **m) {
assert(bus);
assert(m);
assert(bus->rbuffer_size >= size);
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
if (bus->rbuffer_size > size) {
b = memdup((const uint8_t*) bus->rbuffer + size, bus->rbuffer_size - size);
@@ -850,12 +885,6 @@ static int message_make(sd_bus *bus, size_t size, sd_bus_message **m) {
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;
}
@@ -870,6 +899,7 @@ static int message_read(sd_bus *bus, sd_bus_message **m) {
assert(bus);
assert(m);
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
r = message_read_need(bus, &need);
if (r < 0)
@@ -882,6 +912,8 @@ static int message_read(sd_bus *bus, sd_bus_message **m) {
if (!b)
return -ENOMEM;
+ bus->rbuffer = b;
+
zero(iov);
iov.iov_base = (uint8_t*) bus->rbuffer + bus->rbuffer_size;
iov.iov_len = need - bus->rbuffer_size;
@@ -910,6 +942,7 @@ static int dispatch_wqueue(sd_bus *bus) {
int r, c = 0;
assert(bus);
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
if (bus->fd < 0)
return -ENOTCONN;
@@ -951,6 +984,7 @@ static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) {
assert(bus);
assert(m);
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
if (bus->fd < 0)
return -ENOTCONN;
@@ -983,8 +1017,6 @@ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
return -ENOTCONN;
if (!m)
return -EINVAL;
- if (m->header->version > bus->message_version)
- return -EPERM;
r = bus_seal_message(bus, m);
if (r < 0)
@@ -995,7 +1027,7 @@ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
if (m->dont_send && !serial)
return 0;
- 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);
@@ -1057,14 +1089,20 @@ int sd_bus_send_with_reply(
if (!bus)
return -EINVAL;
- if (!bus->fd < 0)
+ if (bus->fd < 0)
return -ENOTCONN;
if (!m)
return -EINVAL;
if (!callback)
return -EINVAL;
- if (!m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
+ if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
return -EINVAL;
+ if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return -EINVAL;
+
+ r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func);
+ if (r < 0)
+ return r;
r = bus_seal_message(bus, m);
if (r < 0)
@@ -1111,6 +1149,30 @@ int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) {
return 1;
}
+static int ensure_running(sd_bus *bus) {
+ int r;
+
+ assert(bus);
+
+ r = sd_bus_is_running(bus);
+ if (r != 0)
+ return r;
+
+ for (;;) {
+ r = sd_bus_process(bus, NULL);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_is_running(bus);
+ if (r != 0)
+ return r;
+
+ r = sd_bus_wait(bus, (uint64_t) -1);
+ if (r < 0)
+ return r;
+ }
+}
+
int sd_bus_send_with_reply_and_block(
sd_bus *bus,
sd_bus_message *m,
@@ -1125,14 +1187,20 @@ int sd_bus_send_with_reply_and_block(
if (!bus)
return -EINVAL;
- if (!bus->fd < 0)
+ if (bus->fd < 0)
return -ENOTCONN;
if (!m)
return -EINVAL;
- if (!m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
+ if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
return -EINVAL;
- if (sd_bus_error_is_dirty(error))
+ if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
return -EINVAL;
+ if (bus_error_is_dirty(error))
+ return -EINVAL;
+
+ r = ensure_running(bus);
+ if (r < 0)
+ return r;
r = sd_bus_send(bus, m, &serial);
if (r < 0)
@@ -1162,6 +1230,9 @@ int sd_bus_send_with_reply_and_block(
if (r < 0)
return r;
if (r > 0) {
+ /* bus_message_dump(incoming); */
+ /* sd_bus_message_rewind(incoming, true); */
+
if (incoming->reply_serial == serial) {
/* Found a match! */
@@ -1223,7 +1294,7 @@ int sd_bus_get_fd(sd_bus *bus) {
return -EINVAL;
if (bus->fd < 0)
- return -EINVAL;
+ return -ENOTCONN;
return bus->fd;
}
@@ -1233,13 +1304,19 @@ int sd_bus_get_events(sd_bus *bus) {
if (!bus)
return -EINVAL;
-
if (bus->fd < 0)
- return -EINVAL;
+ return -ENOTCONN;
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->auth_index < ELEMENTSOF(bus->auth_iovec))
+ 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)
@@ -1250,7 +1327,6 @@ int sd_bus_get_events(sd_bus *bus) {
}
int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
- sd_bus_message *m;
int r;
if (!bus)
@@ -1270,7 +1346,7 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
return -errno;
if (p.revents & (POLLOUT|POLLERR|POLLHUP)) {
- int error;
+ int error = 0;
socklen_t slen = sizeof(error);
r = getsockopt(bus->fd, SOL_SOCKET, SO_ERROR, &error, &slen);
@@ -1297,13 +1373,14 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
return r;
r = bus_read_auth(bus);
- if (r <= 0)
+ if (r < 0)
return r;
- return bus_start_running(bus);
+ return 0;
} else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) {
struct filter_callback *l;
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
r = dispatch_wqueue(bus);
if (r < 0)
@@ -1321,31 +1398,40 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
r = c->callback(bus, m, c->userdata);
free(c);
- if (r != 0) {
- sd_bus_message_unref(m);
+ if (r != 0)
return r < 0 ? r : 0;
- }
}
}
LIST_FOREACH(callbacks, l, bus->filter_callbacks) {
r = l->callback(bus, m, l->userdata);
- if (r != 0) {
- sd_bus_message_unref(m);
+ if (r != 0)
return r < 0 ? r : 0;
- }
}
if (ret) {
*ret = m;
+ m = NULL;
return 1;
}
- sd_bus_message_unref(m);
+ if (sd_bus_message_is_method_call(m, NULL, NULL)) {
+ const sd_bus_error e = SD_BUS_ERROR_INIT_CONST("org.freedesktop.DBus.Error.UnknownObject", "Unknown object.");
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+
+ r = sd_bus_message_new_method_error(bus, m, &e, &reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_send(bus, reply, NULL);
+ if (r < 0)
+ return r;
+ }
+
return 0;
}
- return -ENOTSUP;
+ assert_not_reached("Unknown state");
}
int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
@@ -1356,7 +1442,10 @@ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
if (!bus)
return -EINVAL;
if (bus->fd < 0)
- return -ECONNREFUSED;
+ return -ENOTCONN;
+
+ if (bus->rqueue_size > 0)
+ return 0;
e = sd_bus_get_events(bus);
if (e < 0)
@@ -1368,7 +1457,7 @@ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
r = ppoll(&p, 1, timeout_usec == (uint64_t) -1 ? NULL : timespec_store(&ts, timeout_usec), NULL);
if (r < 0)
- return -EINVAL;
+ return -errno;
return r;
}
@@ -1381,7 +1470,11 @@ int sd_bus_flush(sd_bus *bus) {
if (bus->fd < 0)
return -ENOTCONN;
- if (bus->state == BUS_RUNNING && bus->wqueue_size <= 0)
+ r = ensure_running(bus);
+ if (r < 0)
+ return r;
+
+ if (bus->wqueue_size <= 0)
return 0;
for (;;) {
@@ -1389,7 +1482,7 @@ int sd_bus_flush(sd_bus *bus) {
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);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-27 00:13:50 +0000