***/
#include <errno.h>
+#include <fcntl.h>
#include "util.h"
+#include "utf8.h"
+#include "strv.h"
+#include "time-util.h"
-#include "bus-message.h"
#include "sd-bus.h"
+#include "bus-message.h"
#include "bus-internal.h"
#include "bus-type.h"
#include "bus-signature.h"
-int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored);
+static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored);
-static void message_free(sd_bus_message *m) {
+static void reset_containers(sd_bus_message *m) {
unsigned i;
assert(m);
+ for (i = 0; i < m->n_containers; i++)
+ free(m->containers[i].signature);
+
+ free(m->containers);
+ m->containers = NULL;
+
+ m->n_containers = 0;
+ m->root_container.index = 0;
+}
+
+static void message_free(sd_bus_message *m) {
+ assert(m);
+
if (m->free_header)
free(m->header);
if (m->free_body)
free(m->body);
- for (i = 0; i < m->n_fds; i++)
- close_nointr_nofail(m->fds[i]);
+ if (m->free_kdbus)
+ free(m->kdbus);
- for (i = 0; i < m->n_containers; i++)
- free(m->sub_containers[i].signature);
+ if (m->free_fds) {
+ close_many(m->fds, m->n_fds);
+ free(m->fds);
+ }
+
+ free(m->cmdline_array);
- free(m->sub_containers);
+ reset_containers(m);
+ free(m->root_container.signature);
+
+ free(m->peeked_signature);
free(m);
}
m->destination = (const char*) m->fields + (m->destination - (const char*) o);
if (m->sender)
m->sender = (const char*) m->fields + (m->sender - (const char*) o);
- if (m->signature)
- m->signature = (const char*) m->fields + (m->signature - (const char*) o);
if (m->error.name)
m->error.name = (const char*) m->fields + (m->error.name - (const char*) o);
}
return 0;
}
+int bus_message_from_header(
+ void *buffer,
+ size_t length,
+ int *fds,
+ unsigned n_fds,
+ const struct ucred *ucred,
+ const char *label,
+ size_t extra,
+ sd_bus_message **ret) {
+
+ sd_bus_message *m;
+ struct bus_header *h;
+ size_t a, label_sz;
+
+ assert(buffer || length <= 0);
+ assert(fds || n_fds <= 0);
+ assert(ret);
+
+ if (length < sizeof(struct bus_header))
+ return -EBADMSG;
+
+ h = buffer;
+ if (h->version != 1)
+ return -EBADMSG;
+
+ if (h->serial == 0)
+ return -EBADMSG;
+
+ if (h->type == _SD_BUS_MESSAGE_TYPE_INVALID)
+ return -EBADMSG;
+
+ if (h->endian != SD_BUS_LITTLE_ENDIAN &&
+ h->endian != SD_BUS_BIG_ENDIAN)
+ return -EBADMSG;
+
+ a = ALIGN(sizeof(sd_bus_message)) + ALIGN(extra);
+
+ if (label) {
+ label_sz = strlen(label);
+ a += label_sz + 1;
+ }
+
+ m = malloc0(a);
+ if (!m)
+ return -ENOMEM;
+
+ m->n_ref = 1;
+ m->sealed = true;
+ m->header = h;
+ m->fds = fds;
+ m->n_fds = n_fds;
+
+ if (ucred) {
+ m->uid = ucred->uid;
+ m->pid = ucred->pid;
+ m->gid = ucred->gid;
+ m->uid_valid = m->gid_valid = true;
+ }
+
+ if (label) {
+ m->label = (char*) m + ALIGN(sizeof(sd_bus_message)) + ALIGN(extra);
+ memcpy(m->label, label, label_sz + 1);
+ }
+
+ *ret = m;
+ return 0;
+}
+
+int bus_message_from_malloc(
+ void *buffer,
+ size_t length,
+ int *fds,
+ unsigned n_fds,
+ const struct ucred *ucred,
+ const char *label,
+ sd_bus_message **ret) {
+
+ sd_bus_message *m;
+ int r;
+
+ r = bus_message_from_header(buffer, length, fds, n_fds, ucred, label, 0, &m);
+ if (r < 0)
+ return r;
+
+ if (length != BUS_MESSAGE_SIZE(m)) {
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ m->fields = (uint8_t*) buffer + sizeof(struct bus_header);
+ m->body = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
+
+ m->n_iovec = 1;
+ m->iovec[0].iov_base = buffer;
+ m->iovec[0].iov_len = length;
+
+ r = bus_message_parse_fields(m);
+ if (r < 0)
+ goto fail;
+
+ /* We take possession of the memory and fds now */
+ m->free_header = true;
+ m->free_fds = true;
+
+ *ret = m;
+ return 0;
+
+fail:
+ message_free(m);
+ return r;
+}
+
static sd_bus_message *message_new(sd_bus *bus, uint8_t type) {
sd_bus_message *m;
- m = malloc0(ALIGN(sizeof(struct sd_bus_message)) + sizeof(struct bus_header));
+ m = malloc0(ALIGN(sizeof(sd_bus_message)) + sizeof(struct bus_header));
if (!m)
return NULL;
m->n_ref = 1;
m->header = (struct bus_header*) ((uint8_t*) m + ALIGN(sizeof(struct sd_bus_message)));
-
-#if __BYTE_ORDER == __BIG_ENDIAN
- m->header->endian = SD_BUS_BIG_ENDIAN;
-#else
- m->header->endian = SD_BUS_LITTLE_ENDIAN;
-#endif
+ m->header->endian = SD_BUS_NATIVE_ENDIAN;
m->header->type = type;
m->header->version = bus ? bus->message_version : 1;
+ m->allow_fds = !bus || bus->can_fds || (bus->state != BUS_HELLO && bus->state != BUS_RUNNING);
return m;
}
return -EINVAL;
if (!m)
return -EINVAL;
+ if (bus && bus->state == BUS_UNSET)
+ return -ENOTCONN;
t = message_new(bus, SD_BUS_MESSAGE_TYPE_SIGNAL);
if (!t)
return -ENOMEM;
+ t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
+
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path);
if (r < 0)
goto fail;
return -EINVAL;
if (!m)
return -EINVAL;
+ if (bus && bus->state == BUS_UNSET)
+ return -ENOTCONN;
t = message_new(bus, SD_BUS_MESSAGE_TYPE_METHOD_CALL);
if (!t)
if (!call)
return -EINVAL;
+ if (!call->sealed)
+ return -EPERM;
if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
return -EINVAL;
if (!m)
return -EINVAL;
+ if (bus && bus->state == BUS_UNSET)
+ return -ENOTCONN;
t = message_new(bus, type);
if (!t)
return -ENOMEM;
+ t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
t->reply_serial = BUS_MESSAGE_SERIAL(call);
r = message_append_field_uint32(t, SD_BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial);
t->dont_send = !!(call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED);
*m = t;
+ return 0;
fail:
message_free(t);
sd_bus_message *t;
int r;
- if (!e)
- return -EINVAL;
- if (!e->name)
+ if (!sd_bus_error_is_set(e))
return -EINVAL;
if (!m)
return -EINVAL;
int sd_bus_message_get_uid(sd_bus_message *m, uid_t *uid) {
if (!m)
return -EINVAL;
+ if (!uid)
+ return -EINVAL;
if (!m->uid_valid)
- return -ENOENT;
+ return -ESRCH;
*uid = m->uid;
return 0;
int sd_bus_message_get_gid(sd_bus_message *m, gid_t *gid) {
if (!m)
return -EINVAL;
+ if (!gid)
+ return -EINVAL;
if (!m->gid_valid)
- return -ENOENT;
+ return -ESRCH;
*gid = m->gid;
return 0;
int sd_bus_message_get_pid(sd_bus_message *m, pid_t *pid) {
if (!m)
return -EINVAL;
+ if (!pid)
+ return -EINVAL;
if (m->pid <= 0)
- return -ENOENT;
+ return -ESRCH;
*pid = m->pid;
return 0;
int sd_bus_message_get_tid(sd_bus_message *m, pid_t *tid) {
if (!m)
return -EINVAL;
+ if (!tid)
+ return -EINVAL;
if (m->tid <= 0)
- return -ENOENT;
+ return -ESRCH;
*tid = m->tid;
return 0;
}
+int sd_bus_message_get_pid_starttime(sd_bus_message *m, uint64_t *usec) {
+ if (!m)
+ return -EINVAL;
+ if (!usec)
+ return -EINVAL;
+ if (m->pid_starttime <= 0)
+ return -ESRCH;
+
+ *usec = m->pid_starttime;
+ return 0;
+}
+
+int sd_bus_message_get_selinux_context(sd_bus_message *m, const char **ret) {
+ if (!m)
+ return -EINVAL;
+ if (!m->label)
+ return -ESRCH;
+
+ *ret = m->label;
+ return 0;
+}
+
+int sd_bus_message_get_monotonic_timestamp(sd_bus_message *m, uint64_t *usec) {
+ if (!m)
+ return -EINVAL;
+ if (!usec)
+ return -EINVAL;
+ if (m->monotonic <= 0)
+ return -ESRCH;
+
+ *usec = m->monotonic;
+ return 0;
+}
+
+int sd_bus_message_get_realtime_timestamp(sd_bus_message *m, uint64_t *usec) {
+ if (!m)
+ return -EINVAL;
+ if (!usec)
+ return -EINVAL;
+ if (m->realtime <= 0)
+ return -ESRCH;
+
+ *usec = m->realtime;
+ return 0;
+}
+
+int sd_bus_message_get_comm(sd_bus_message *m, const char **ret) {
+ if (!m)
+ return -EINVAL;
+ if (!ret)
+ return -EINVAL;
+ if (!m->comm)
+ return -ESRCH;
+
+ *ret = m->comm;
+ return 0;
+}
+
+int sd_bus_message_get_tid_comm(sd_bus_message *m, const char **ret) {
+ if (!m)
+ return -EINVAL;
+ if (!ret)
+ return -EINVAL;
+ if (!m->tid_comm)
+ return -ESRCH;
+
+ *ret = m->tid_comm;
+ return 0;
+}
+
+int sd_bus_message_get_exe(sd_bus_message *m, const char **ret) {
+ if (!m)
+ return -EINVAL;
+ if (!ret)
+ return -EINVAL;
+ if (!m->exe)
+ return -ESRCH;
+
+ *ret = m->exe;
+ return 0;
+}
+
+int sd_bus_message_get_cgroup(sd_bus_message *m, const char **ret) {
+ if (!m)
+ return -EINVAL;
+ if (!ret)
+ return -EINVAL;
+ if (!m->cgroup)
+ return -ESRCH;
+
+ *ret = m->cgroup;
+ return 0;
+}
+
+int sd_bus_message_get_cmdline(sd_bus_message *m, char ***cmdline) {
+ size_t n, i;
+ const char *p;
+ bool first;
+
+ if (!m)
+ return -EINVAL;
+
+ if (!m->cmdline)
+ return -ENOENT;
+
+ for (p = m->cmdline, n = 0; p < m->cmdline + m->cmdline_length; p++)
+ if (*p == 0)
+ n++;
+
+ m->cmdline_array = new(char*, n + 1);
+ if (!m->cmdline_array)
+ return -ENOMEM;
+
+ for (p = m->cmdline, i = 0, first = true; p < m->cmdline + m->cmdline_length; p++) {
+ if (first)
+ m->cmdline_array[i++] = (char*) p;
+
+ first = *p == 0;
+ }
+
+ m->cmdline_array[i] = NULL;
+ *cmdline = m->cmdline_array;
+
+ return 0;
+}
+
int sd_bus_message_is_signal(sd_bus_message *m, const char *interface, const char *member) {
if (!m)
return -EINVAL;
if (m->n_containers == 0)
return &m->root_container;
- assert(m->sub_containers);
- return m->sub_containers + m->n_containers - 1;
+ assert(m->containers);
+ return m->containers + m->n_containers - 1;
}
static void *message_extend_body(sd_bus_message *m, size_t align, size_t sz) {
struct bus_container *c;
assert(m);
+ assert(align > 0);
o = m->body;
added = m->header->body_size;
added = m->header->body_size - added;
- for (c = m->sub_containers; c < m->sub_containers + m->n_containers; c++)
+ for (c = m->containers; c < m->containers + m->n_containers; c++)
if (c->array_size) {
c->array_size = (uint32_t*) ((uint8_t*) m->body + ((uint8_t*) c->array_size - (uint8_t*) o));
*c->array_size += added;
int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) {
struct bus_container *c;
- size_t sz, align, nindex;
+ ssize_t align, sz;
uint32_t k;
void *a;
char *e = NULL;
+ int fd = -1;
+ uint32_t fdi = 0;
+ int r;
if (!m)
return -EINVAL;
+ if (!p)
+ return -EINVAL;
if (m->sealed)
return -EPERM;
if (!bus_type_is_basic(type))
/* Container signature is already set */
if (c->signature[c->index] != type)
- return -EINVAL;
+ return -ENXIO;
} else {
/* Maybe we can append to the signature? But only if this is the top-level container*/
if (c->enclosing != 0)
- return -EINVAL;
+ return -ENXIO;
e = strextend(&c->signature, CHAR_TO_STR(type), NULL);
if (!e)
return -ENOMEM;
}
- nindex = c->index + 1;
-
switch (type) {
case SD_BUS_TYPE_STRING:
case SD_BUS_TYPE_OBJECT_PATH:
+
align = 4;
sz = 4 + strlen(p) + 1;
break;
case SD_BUS_TYPE_SIGNATURE:
+
align = 1;
sz = 1 + strlen(p) + 1;
break;
p = &k;
break;
+ case SD_BUS_TYPE_UNIX_FD: {
+ int z, *f;
+
+ if (!m->allow_fds) {
+ r = -ENOTSUP;
+ goto fail;
+ }
+
+ align = sz = 4;
+
+ z = *(int*) p;
+ if (z < 0) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+ fd = fcntl(z, F_DUPFD_CLOEXEC, 3);
+ if (fd < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ f = realloc(m->fds, sizeof(int) * (m->n_fds + 1));
+ if (!f) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ fdi = m->n_fds;
+ f[fdi] = fd;
+ m->fds = f;
+ m->free_fds = true;
+ break;
+ }
+
default:
align = bus_type_get_alignment(type);
sz = bus_type_get_size(type);
a = message_extend_body(m, align, sz);
if (!a) {
- /* Truncate extended signature again */
- if (e)
- c->signature[c->index] = 0;
-
- return -ENOMEM;
+ r = -ENOMEM;
+ goto fail;
}
if (type == SD_BUS_TYPE_STRING || type == SD_BUS_TYPE_OBJECT_PATH) {
if (stored)
*stored = (const uint8_t*) a + 1;
+ } else if (type == SD_BUS_TYPE_UNIX_FD) {
+ *(uint32_t*) a = fdi;
+
+ if (stored)
+ *stored = a;
+
+ m->n_fds ++;
} else {
memcpy(a, p, sz);
}
if (c->enclosing != SD_BUS_TYPE_ARRAY)
- c->index = nindex;
+ c->index++;
return 0;
+
+fail:
+ /* Truncate extended signature again */
+ if (e)
+ c->signature[c->index] = 0;
+
+ if (fd >= 0)
+ close_nointr_nofail(fd);
+
+ return r;
}
int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) {
const char *contents,
uint32_t **array_size) {
+ unsigned nindex;
char *e = NULL;
- size_t nindex;
void *a, *b;
int alignment;
size_t saved;
/* Verify the existing signature */
if (c->signature[c->index] != SD_BUS_TYPE_ARRAY)
- return -EINVAL;
+ return -ENXIO;
if (!startswith(c->signature + c->index + 1, contents))
- return -EINVAL;
+ return -ENXIO;
nindex = c->index + 1 + strlen(contents);
} else {
if (c->enclosing != 0)
- return -EINVAL;
+ return -ENXIO;
/* Extend the existing signature */
const char *contents) {
char *e = NULL;
- size_t l, nindex;
+ size_t l;
void *a;
assert(m);
if (c->signature && c->signature[c->index]) {
if (c->signature[c->index] != SD_BUS_TYPE_VARIANT)
- return -EINVAL;
+ return -ENXIO;
} else {
if (c->enclosing != 0)
- return -EINVAL;
+ return -ENXIO;
e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_VARIANT), NULL);
if (!e)
return -ENOMEM;
}
- nindex = c->index + 1;
-
l = strlen(contents);
a = message_extend_body(m, 1, 1 + l + 1);
if (!a) {
memcpy((uint8_t*) a + 1, contents, l + 1);
if (c->enclosing != SD_BUS_TYPE_ARRAY)
- c->index = nindex;
+ c->index++;
return 0;
}
if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN ||
!startswith(c->signature + c->index + 1, contents) ||
c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END)
- return -EINVAL;
+ return -ENXIO;
nindex = c->index + 1 + l + 1;
} else {
if (c->enclosing != 0)
- return -EINVAL;
+ return -ENXIO;
e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_END), NULL);
if (!e)
return -EINVAL;
if (c->enclosing != SD_BUS_TYPE_ARRAY)
- return -EINVAL;
+ return -ENXIO;
if (c->signature && c->signature[c->index]) {
size_t l;
if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN ||
!startswith(c->signature + c->index + 1, contents) ||
c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END)
- return -EINVAL;
+ return -ENXIO;
nindex = c->index + 1 + l + 1;
} else
- return -EINVAL;
+ return -ENXIO;
/* Align contents to 8 byte boundary */
if (!message_extend_body(m, 8, 0))
char type,
const char *contents) {
- struct bus_container *c, *sub;
- char *signature;
+ struct bus_container *c, *w;
uint32_t *array_size = NULL;
+ char *signature;
int r;
if (!m)
return -EINVAL;
/* Make sure we have space for one more container */
- sub = realloc(m->sub_containers, sizeof(struct bus_container) * (m->n_containers + 1));
- if (!sub)
+ w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1));
+ if (!w)
return -ENOMEM;
-
- m->sub_containers = sub;
+ m->containers = w;
c = message_get_container(m);
}
/* OK, let's fill it in */
- sub += m->n_containers++;
-
- sub->enclosing = type;
- sub->signature = signature;
- sub->index = 0;
- sub->array_size = array_size;
+ w += m->n_containers++;
+ w->enclosing = type;
+ w->signature = signature;
+ w->index = 0;
+ w->array_size = array_size;
+ w->begin = 0;
return 0;
}
return -EINVAL;
c = message_get_container(m);
-
- if (!c->signature)
- return -EINVAL;
-
if (c->enclosing != SD_BUS_TYPE_ARRAY)
- if (c->signature[c->index] != 0)
+ if (c->signature && c->signature[c->index] != 0)
return -EINVAL;
free(c->signature);
return 0;
}
-static int message_append_ap(
+
+typedef struct {
+ const char *types;
+ unsigned n_struct;
+ unsigned n_array;
+} TypeStack;
+
+static int type_stack_push(TypeStack *stack, unsigned max, unsigned *i, const char *types, unsigned n_struct, unsigned n_array) {
+ assert(stack);
+ assert(max > 0);
+
+ if (*i >= max)
+ return -EINVAL;
+
+ stack[*i].types = types;
+ stack[*i].n_struct = n_struct;
+ stack[*i].n_array = n_array;
+ (*i)++;
+
+ return 0;
+}
+
+static int type_stack_pop(TypeStack *stack, unsigned max, unsigned *i, const char **types, unsigned *n_struct, unsigned *n_array) {
+ assert(stack);
+ assert(max > 0);
+ assert(types);
+ assert(n_struct);
+ assert(n_array);
+
+ if (*i <= 0)
+ return 0;
+
+ (*i)--;
+ *types = stack[*i].types;
+ *n_struct = stack[*i].n_struct;
+ *n_array = stack[*i].n_array;
+
+ return 1;
+}
+
+int bus_message_append_ap(
sd_bus_message *m,
const char *types,
va_list ap) {
- const char *t;
+ unsigned n_array, n_struct;
+ TypeStack stack[BUS_CONTAINER_DEPTH];
+ unsigned stack_ptr = 0;
int r;
assert(m);
- assert(types);
- for (t = types; *t; t++) {
+ if (!types)
+ return 0;
+
+ n_array = (unsigned) -1;
+ n_struct = strlen(types);
+
+ for (;;) {
+ const char *t;
+
+ if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) {
+ r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+
+ continue;
+ }
+
+ t = types;
+ if (n_array != (unsigned) -1)
+ n_array --;
+ else {
+ types ++;
+ n_struct--;
+ }
+
switch (*t) {
case SD_BUS_TYPE_BYTE: {
case SD_BUS_TYPE_BOOLEAN:
case SD_BUS_TYPE_INT32:
- case SD_BUS_TYPE_UINT32: {
+ case SD_BUS_TYPE_UINT32:
+ case SD_BUS_TYPE_UNIX_FD: {
uint32_t x;
+ /* We assume a boolean is the same as int32_t */
+ assert_cc(sizeof(int32_t) == sizeof(int));
+
x = va_arg(ap, uint32_t);
r = sd_bus_message_append_basic(m, *t, &x);
break;
break;
}
- case SD_BUS_TYPE_UNIX_FD: {
- int x;
-
- x = va_arg(ap, int);
- r = sd_bus_message_append_basic(m, *t, &x);
- break;
- }
-
- case SD_BUS_TYPE_ARRAY: {
- unsigned i, n;
- size_t k;
+ case SD_BUS_TYPE_ARRAY: {
+ size_t k;
r = signature_element_length(t + 1, &k);
if (r < 0)
{
char s[k + 1];
-
memcpy(s, t + 1, k);
s[k] = 0;
- t += k;
r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, s);
if (r < 0)
return r;
+ }
- n = va_arg(ap, unsigned);
+ if (n_array == (unsigned) -1) {
+ types += k;
+ n_struct -= k;
+ }
- for (i = 0; i < n; i++) {
- r = message_append_ap(m, s, ap);
- if (r < 0)
- return r;
- }
+ r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
+ if (r < 0)
+ return r;
- r = sd_bus_message_close_container(m);
- }
+ types = t + 1;
+ n_struct = k;
+ n_array = va_arg(ap, unsigned);
break;
}
if (r < 0)
return r;
- r = message_append_ap(m, s, ap);
+ r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
if (r < 0)
return r;
- r = sd_bus_message_close_container(m);
+ types = s;
+ n_struct = strlen(s);
+ n_array = (unsigned) -1;
+
break;
}
r = sd_bus_message_open_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s);
if (r < 0)
return r;
+ }
- t += k - 1;
+ if (n_array == (unsigned) -1) {
+ types += k - 1;
+ n_struct -= k - 1;
+ }
- r = message_append_ap(m, s, ap);
- if (r < 0)
- return r;
+ r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
+ if (r < 0)
+ return r;
- r = sd_bus_message_close_container(m);
- }
+ types = t + 1;
+ n_struct = k - 2;
+ n_array = (unsigned) -1;
break;
}
if (m->sealed)
return -EPERM;
if (!types)
- return -EINVAL;
+ return 0;
va_start(ap, types);
- r = message_append_ap(m, types, ap);
+ r = bus_message_append_ap(m, types, ap);
va_end(ap);
return r;
}
-int sd_bus_message_read_type(sd_bus_message *m, char *type, char *element, size_t *length) {
- return -ENOTSUP;
-}
+static int buffer_peek(const void *p, uint32_t sz, size_t *rindex, size_t align, size_t nbytes, void **r) {
+ size_t k, start, n;
+
+ assert(rindex);
+ assert(align > 0);
+
+ start = ALIGN_TO((size_t) *rindex, align);
+ n = start + nbytes;
+
+ if (n > sz)
+ return -EBADMSG;
-int sd_bus_message_read_basic(sd_bus_message *m, char type, char element, const void **p, size_t *length) {
- return -ENOTSUP;
+ /* Verify that padding is 0 */
+ for (k = *rindex; k < start; k++)
+ if (((const uint8_t*) p)[k] != 0)
+ return -EBADMSG;
+
+ if (r)
+ *r = (uint8_t*) p + start;
+
+ *rindex = n;
+
+ return 1;
}
-int sd_bus_message_read(sd_bus_message *m, const char *types, ...) {
- return -ENOTSUP;
+static bool message_end_of_array(sd_bus_message *m, size_t index) {
+ struct bus_container *c;
+
+ assert(m);
+
+ c = message_get_container(m);
+ if (!c->array_size)
+ return false;
+
+ return index >= c->begin + BUS_MESSAGE_BSWAP32(m, *c->array_size);
}
-int message_parse(sd_bus_message *m) {
+static int message_peek_body(sd_bus_message *m, size_t *rindex, size_t align, size_t nbytes, void **ret) {
assert(m);
+ assert(rindex);
+ assert(align > 0);
- if (m->header->version != 1)
- return -EIO;
+ if (message_end_of_array(m, *rindex))
+ return 0;
+
+ return buffer_peek(m->body, BUS_MESSAGE_BODY_SIZE(m), rindex, align, nbytes, ret);
+}
- if (m->header->endian != SD_BUS_BIG_ENDIAN &&
- m->header->endian != SD_BUS_LITTLE_ENDIAN)
- return -EIO;
+static bool validate_nul(const char *s, size_t l) {
- return 0;
+ /* Check for NUL chars in the string */
+ if (memchr(s, 0, l))
+ return false;
+
+ /* Check for NUL termination */
+ if (s[l] != 0)
+ return false;
+
+ return true;
}
-static void setup_iovec(sd_bus_message *m) {
- assert(m);
- assert(m->sealed);
+static bool validate_string(const char *s, size_t l) {
- m->n_iovec = 0;
+ if (!validate_nul(s, l))
+ return false;
- m->iovec[m->n_iovec].iov_base = m->header;
- m->iovec[m->n_iovec].iov_len = sizeof(*m->header);
- m->n_iovec++;
+ /* Check if valid UTF8 */
+ if (!utf8_is_valid(s))
+ return false;
- if (m->fields) {
- m->iovec[m->n_iovec].iov_base = m->fields;
- m->iovec[m->n_iovec].iov_len = m->header->fields_size;
- m->n_iovec++;
+ return true;
+}
- if (m->header->fields_size % 8 != 0) {
- static const uint8_t padding[7] = { 0, 0, 0, 0, 0, 0, 0 };
+static bool validate_signature(const char *s, size_t l) {
- m->iovec[m->n_iovec].iov_base = (void*) padding;
- m->iovec[m->n_iovec].iov_len = 8 - m->header->fields_size % 8;
- m->n_iovec++;
- }
- }
+ if (!validate_nul(s, l))
+ return false;
- if (m->body) {
- m->iovec[m->n_iovec].iov_base = m->body;
- m->iovec[m->n_iovec].iov_len = m->header->body_size;
- m->n_iovec++;
- }
+ /* Check if valid signature */
+ if (!signature_is_valid(s, true))
+ return false;
+
+ return true;
}
-int message_seal(sd_bus_message *m, uint64_t serial) {
- int r;
+static bool validate_object_path(const char *s, size_t l) {
- assert(m);
+ if (!validate_nul(s, l))
+ return false;
- if (m->sealed)
+ if (!object_path_is_valid(s))
+ return false;
+
+ return true;
+}
+
+int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p) {
+ struct bus_container *c;
+ int r;
+ void *q;
+
+ if (!m)
+ return -EINVAL;
+ if (!m->sealed)
return -EPERM;
+ if (!bus_type_is_basic(type))
+ return -EINVAL;
+ if (!p)
+ return -EINVAL;
- if (m->n_containers > 0)
- return -EBADMSG;
+ c = message_get_container(m);
- /* If there's a non-trivial signature set, then add it in here */
- if (!isempty(m->root_container.signature)) {
- r = message_append_field_signature(m, SD_BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, &m->signature);
+ if (!c->signature || c->signature[c->index] == 0)
+ return 0;
+
+ if (c->signature[c->index] != type)
+ return -ENXIO;
+
+ switch (type) {
+
+ case SD_BUS_TYPE_STRING:
+ case SD_BUS_TYPE_OBJECT_PATH: {
+ uint32_t l;
+ size_t rindex;
+
+ rindex = m->rindex;
+ r = message_peek_body(m, &rindex, 4, 4, &q);
+ if (r <= 0)
+ return r;
+
+ l = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
+ r = message_peek_body(m, &rindex, 1, l+1, &q);
if (r < 0)
return r;
+ if (r == 0)
+ return -EBADMSG;
+
+ if (type == SD_BUS_TYPE_OBJECT_PATH) {
+ if (!validate_object_path(q, l))
+ return -EBADMSG;
+ } else {
+ if (!validate_string(q, l))
+ return -EBADMSG;
+ }
+
+ m->rindex = rindex;
+ *(const char**) p = q;
+ break;
}
- if (m->n_fds > 0) {
- r = message_append_field_uint32(m, SD_BUS_MESSAGE_HEADER_UNIX_FDS, m->n_fds);
+ case SD_BUS_TYPE_SIGNATURE: {
+ uint8_t l;
+ size_t rindex;
+
+ rindex = m->rindex;
+ r = message_peek_body(m, &rindex, 1, 1, &q);
+ if (r <= 0)
+ return r;
+
+ l = *(uint8_t*) q;
+ r = message_peek_body(m, &rindex, 1, l+1, &q);
if (r < 0)
return r;
+ if (r == 0)
+ return -EBADMSG;
+
+ if (!validate_signature(q, l))
+ return -EBADMSG;
+
+ m->rindex = rindex;
+ *(const char**) p = q;
+ break;
}
- m->header->serial = serial;
- m->sealed = true;
+ default: {
+ ssize_t sz, align;
+ size_t rindex;
+
+ align = bus_type_get_alignment(type);
+ sz = bus_type_get_size(type);
+ assert(align > 0 && sz > 0);
- setup_iovec(m);
+ rindex = m->rindex;
+ r = message_peek_body(m, &rindex, align, sz, &q);
+ if (r <= 0)
+ return r;
- return 0;
+ switch (type) {
+
+ case SD_BUS_TYPE_BYTE:
+ *(uint8_t*) p = *(uint8_t*) q;
+ break;
+
+ case SD_BUS_TYPE_BOOLEAN:
+ *(int*) p = !!*(uint32_t*) q;
+ break;
+
+ case SD_BUS_TYPE_INT16:
+ case SD_BUS_TYPE_UINT16:
+ *(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q);
+ break;
+
+ case SD_BUS_TYPE_INT32:
+ case SD_BUS_TYPE_UINT32:
+ *(uint32_t*) p = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
+ break;
+
+ case SD_BUS_TYPE_INT64:
+ case SD_BUS_TYPE_UINT64:
+ case SD_BUS_TYPE_DOUBLE:
+ *(uint64_t*) p = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q);
+ break;
+
+ case SD_BUS_TYPE_UNIX_FD: {
+ uint32_t j;
+
+ j = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
+ if (j >= m->n_fds)
+ return -EBADMSG;
+
+ *(int*) p = m->fds[j];
+ break;
+ }
+
+ default:
+ assert_not_reached("Unknown basic type...");
+ }
+
+ m->rindex = rindex;
+
+ break;
+ }
+ }
+
+ if (c->enclosing != SD_BUS_TYPE_ARRAY)
+ c->index++;
+
+ return 1;
}
-int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) {
- if (!m)
+static int bus_message_enter_array(
+ sd_bus_message *m,
+ struct bus_container *c,
+ const char *contents,
+ uint32_t **array_size) {
+
+ size_t rindex;
+ void *q;
+ int r, alignment;
+
+ assert(m);
+ assert(c);
+ assert(contents);
+ assert(array_size);
+
+ if (!signature_is_single(contents))
return -EINVAL;
- if (!destination)
+
+ alignment = bus_type_get_alignment(contents[0]);
+ if (alignment < 0)
+ return alignment;
+
+ if (!c->signature || c->signature[c->index] == 0)
+ return 0;
+
+ if (c->signature[c->index] != SD_BUS_TYPE_ARRAY)
+ return -ENXIO;
+
+ if (!startswith(c->signature + c->index + 1, contents))
+ return -ENXIO;
+
+ rindex = m->rindex;
+ r = message_peek_body(m, &rindex, 4, 4, &q);
+ if (r <= 0)
+ return r;
+
+ if (BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q) > BUS_ARRAY_MAX_SIZE)
+ return -EBADMSG;
+
+ r = message_peek_body(m, &rindex, alignment, 0, NULL);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -EBADMSG;
+
+ if (c->enclosing != SD_BUS_TYPE_ARRAY)
+ c->index += 1 + strlen(contents);
+
+ m->rindex = rindex;
+
+ *array_size = (uint32_t*) q;
+
+ return 1;
+}
+
+static int bus_message_enter_variant(
+ sd_bus_message *m,
+ struct bus_container *c,
+ const char *contents) {
+
+ size_t rindex;
+ uint8_t l;
+ void *q;
+ int r;
+
+ assert(m);
+ assert(c);
+ assert(contents);
+
+ if (!signature_is_single(contents))
return -EINVAL;
- if (m->sealed)
- return -EPERM;
- if (m->destination)
- return -EEXIST;
- return message_append_field_string(m, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination);
+ if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN)
+ return -EINVAL;
+
+ if (!c->signature || c->signature[c->index] == 0)
+ return 0;
+
+ if (c->signature[c->index] != SD_BUS_TYPE_VARIANT)
+ return -ENXIO;
+
+ rindex = m->rindex;
+ r = message_peek_body(m, &rindex, 1, 1, &q);
+ if (r <= 0)
+ return r;
+
+ l = *(uint8_t*) q;
+ r = message_peek_body(m, &rindex, 1, l+1, &q);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -EBADMSG;
+
+ if (!validate_signature(q, l))
+ return -EBADMSG;
+
+ if (!streq(q, contents))
+ return -ENXIO;
+
+ if (c->enclosing != SD_BUS_TYPE_ARRAY)
+ c->index++;
+
+ m->rindex = rindex;
+
+ return 1;
}
-void message_dump(sd_bus_message *m) {
-
- log_info("Message %p\n"
- "\tn_ref=%u\n"
- "\tendian=%c\n"
- "\ttype=%i\n"
- "\tflags=%u\n"
- "\tversion=%u\n"
- "\tserial=%u\n"
- "\tfields_size=%u\n"
- "\tbody_size=%u\n"
- "\tpath=%s\n"
- "\tinterface=%s\n"
- "\tmember=%s\n"
- "\tdestination=%s\n"
- "\tsender=%s\n"
- "\tsignature=%s\n"
- "\treply_serial=%u\n"
- "\terror.name=%s\n"
- "\terror.message=%s\n"
- "\tsealed=%s\n",
- m,
- m->n_ref,
- m->header->endian,
- m->header->type,
- m->header->flags,
- m->header->version,
- BUS_MESSAGE_SERIAL(m),
- BUS_MESSAGE_FIELDS_SIZE(m),
- BUS_MESSAGE_BODY_SIZE(m),
- strna(m->path),
- strna(m->interface),
- strna(m->member),
- strna(m->destination),
- strna(m->sender),
- strna(m->signature),
- m->reply_serial,
- strna(m->error.name),
- strna(m->error.message),
- yes_no(m->sealed));
+static int bus_message_enter_struct(
+ sd_bus_message *m,
+ struct bus_container *c,
+ const char *contents) {
+
+ size_t l;
+ int r;
+
+ assert(m);
+ assert(c);
+ assert(contents);
+
+ if (!signature_is_valid(contents, false))
+ return -EINVAL;
+
+ if (!c->signature || c->signature[c->index] == 0)
+ return 0;
+
+ l = strlen(contents);
+
+ if (c->signature[c->index] != SD_BUS_TYPE_STRUCT_BEGIN ||
+ !startswith(c->signature + c->index + 1, contents) ||
+ c->signature[c->index + 1 + l] != SD_BUS_TYPE_STRUCT_END)
+ return -ENXIO;
+
+ r = message_peek_body(m, &m->rindex, 8, 0, NULL);
+ if (r <= 0)
+ return r;
+
+ if (c->enclosing != SD_BUS_TYPE_ARRAY)
+ c->index += 1 + l + 1;
+
+ return 1;
}
-int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) {
- size_t total;
- unsigned i;
- void *p, *e;
+static int bus_message_enter_dict_entry(
+ sd_bus_message *m,
+ struct bus_container *c,
+ const char *contents) {
+
+ size_t l;
+ int r;
assert(m);
- assert(buffer);
- assert(sz);
+ assert(c);
+ assert(contents);
- for (i = 0, total = 0; i < m->n_iovec; i++)
- total += m->iovec[i].iov_len;
+ if (!signature_is_pair(contents))
+ return -EINVAL;
- p = malloc(total);
- if (!p)
- return -ENOMEM;
+ if (c->enclosing != SD_BUS_TYPE_ARRAY)
+ return -ENXIO;
+
+ if (!c->signature || c->signature[c->index] == 0)
+ return 0;
- for (i = 0, e = p; i < m->n_iovec; i++)
- e = mempcpy(e, m->iovec[i].iov_base, m->iovec[i].iov_len);
+ l = strlen(contents);
- *buffer = p;
- *sz = total;
+ if (c->signature[c->index] != SD_BUS_TYPE_DICT_ENTRY_BEGIN ||
+ !startswith(c->signature + c->index + 1, contents) ||
+ c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END)
+ return -ENXIO;
+
+ r = message_peek_body(m, &m->rindex, 8, 0, NULL);
+ if (r <= 0)
+ return r;
+
+ if (c->enclosing != SD_BUS_TYPE_ARRAY)
+ c->index += 1 + l + 1;
+
+ return 1;
+}
+
+int sd_bus_message_enter_container(sd_bus_message *m, char type, const char *contents) {
+ struct bus_container *c, *w;
+ uint32_t *array_size = NULL;
+ char *signature;
+ int r;
+
+ if (!m)
+ return -EINVAL;
+ if (!m->sealed)
+ return -EPERM;
+ if (!contents)
+ return -EINVAL;
+
+ /*
+ * We enforce a global limit on container depth, that is much
+ * higher than the 32 structs and 32 arrays the specification
+ * mandates. This is simpler to implement for us, and we need
+ * this only to ensure our container array doesn't grow
+ * without bounds. We are happy to return any data from a
+ * message as long as the data itself is valid, even if the
+ * overall message might be not.
+ *
+ * Note that the message signature is validated when
+ * parsing the headers, and that validation does check the
+ * 32/32 limit.
+ *
+ * Note that the specification defines no limits on the depth
+ * of stacked variants, but we do.
+ */
+ if (m->n_containers >= BUS_CONTAINER_DEPTH)
+ return -EBADMSG;
+
+ w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1));
+ if (!w)
+ return -ENOMEM;
+ m->containers = w;
+
+ c = message_get_container(m);
+
+ if (!c->signature || c->signature[c->index] == 0)
+ return 0;
+
+ signature = strdup(contents);
+ if (!signature)
+ return -ENOMEM;
+
+ if (type == SD_BUS_TYPE_ARRAY)
+ r = bus_message_enter_array(m, c, contents, &array_size);
+ else if (type == SD_BUS_TYPE_VARIANT)
+ r = bus_message_enter_variant(m, c, contents);
+ else if (type == SD_BUS_TYPE_STRUCT)
+ r = bus_message_enter_struct(m, c, contents);
+ else if (type == SD_BUS_TYPE_DICT_ENTRY)
+ r = bus_message_enter_dict_entry(m, c, contents);
+ else
+ r = -EINVAL;
+
+ if (r <= 0) {
+ free(signature);
+ return r;
+ }
+
+ /* OK, let's fill it in */
+ w += m->n_containers++;
+ w->enclosing = type;
+ w->signature = signature;
+ w->index = 0;
+ w->array_size = array_size;
+ w->begin = m->rindex;
+
+ return 1;
+}
+
+int sd_bus_message_exit_container(sd_bus_message *m) {
+ struct bus_container *c;
+
+ if (!m)
+ return -EINVAL;
+ if (!m->sealed)
+ return -EPERM;
+ if (m->n_containers <= 0)
+ return -EINVAL;
+
+ c = message_get_container(m);
+ if (c->enclosing == SD_BUS_TYPE_ARRAY) {
+ uint32_t l;
+
+ l = BUS_MESSAGE_BSWAP32(m, *c->array_size);
+ if (c->begin + l != m->rindex)
+ return -EBUSY;
+
+ } else {
+ if (c->signature && c->signature[c->index] != 0)
+ return -EINVAL;
+ }
+
+ free(c->signature);
+ m->n_containers--;
+
+ return 1;
+}
+
+int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents) {
+ struct bus_container *c;
+ int r;
+
+ if (!m)
+ return -EINVAL;
+ if (!m->sealed)
+ return -EPERM;
+
+ c = message_get_container(m);
+
+ if (!c->signature || c->signature[c->index] == 0)
+ goto eof;
+
+ if (message_end_of_array(m, m->rindex))
+ goto eof;
+
+ if (bus_type_is_basic(c->signature[c->index])) {
+ if (contents)
+ *contents = NULL;
+ if (type)
+ *type = c->signature[c->index];
+ return 1;
+ }
+
+ if (c->signature[c->index] == SD_BUS_TYPE_ARRAY) {
+
+ if (contents) {
+ size_t l;
+ char *sig;
+
+ r = signature_element_length(c->signature+c->index+1, &l);
+ if (r < 0)
+ return r;
+
+ assert(l >= 1);
+
+ sig = strndup(c->signature + c->index + 1, l);
+ if (!sig)
+ return -ENOMEM;
+
+ free(m->peeked_signature);
+ m->peeked_signature = sig;
+
+ *contents = sig;
+ }
+
+ if (type)
+ *type = SD_BUS_TYPE_ARRAY;
+
+ return 1;
+ }
+
+ if (c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ||
+ c->signature[c->index] == SD_BUS_TYPE_DICT_ENTRY_BEGIN) {
+
+ if (contents) {
+ size_t l;
+ char *sig;
+
+ r = signature_element_length(c->signature+c->index, &l);
+ if (r < 0)
+ return r;
+
+ assert(l >= 2);
+ sig = strndup(c->signature + c->index + 1, l - 2);
+ if (!sig)
+ return -ENOMEM;
+
+ free(m->peeked_signature);
+ m->peeked_signature = sig;
+
+ *contents = sig;
+ }
+
+ if (type)
+ *type = c->signature[c->index] == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY;
+
+ return 1;
+ }
+
+ if (c->signature[c->index] == SD_BUS_TYPE_VARIANT) {
+ if (contents) {
+ size_t rindex, l;
+ void *q;
+
+ rindex = m->rindex;
+ r = message_peek_body(m, &rindex, 1, 1, &q);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ goto eof;
+
+ l = *(uint8_t*) q;
+ r = message_peek_body(m, &rindex, 1, l+1, &q);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -EBADMSG;
+
+ if (!validate_signature(q, l))
+ return -EBADMSG;
+
+ *contents = q;
+ }
+
+ if (type)
+ *type = SD_BUS_TYPE_VARIANT;
+
+ return 1;
+ }
+
+ return -EINVAL;
+
+eof:
+ if (type)
+ *type = c->enclosing;
+ if (contents)
+ *contents = NULL;
+ return 0;
+}
+
+int sd_bus_message_rewind(sd_bus_message *m, int complete) {
+ struct bus_container *c;
+
+ if (!m)
+ return -EINVAL;
+ if (!m->sealed)
+ return -EPERM;
+
+ if (complete) {
+ reset_containers(m);
+ m->rindex = 0;
+ m->root_container.index = 0;
+
+ c = message_get_container(m);
+ } else {
+ c = message_get_container(m);
+
+ c->index = 0;
+ m->rindex = c->begin;
+ }
+
+ return !isempty(c->signature);
+}
+static int message_read_ap(
+ sd_bus_message *m,
+ const char *types,
+ va_list ap) {
+
+ unsigned n_array, n_struct;
+ TypeStack stack[BUS_CONTAINER_DEPTH];
+ unsigned stack_ptr = 0;
+ int r;
+
+ assert(m);
+
+ if (!types)
+ return 0;
+
+ /* Ideally, we'd just call ourselves recursively on every
+ * complex type. However, the state of a va_list that is
+ * passed to a function is undefined after that function
+ * returns. This means we need to docode the va_list linearly
+ * in a single stackframe. We hence implement our own
+ * home-grown stack in an array. */
+
+ n_array = (unsigned) -1;
+ n_struct = strlen(types);
+
+ for (;;) {
+ const char *t;
+
+ if (n_array == 0 || (n_array == (unsigned) -1 && n_struct == 0)) {
+ r = type_stack_pop(stack, ELEMENTSOF(stack), &stack_ptr, &types, &n_struct, &n_array);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ continue;
+ }
+
+ t = types;
+ if (n_array != (unsigned) -1)
+ n_array --;
+ else {
+ types ++;
+ n_struct--;
+ }
+
+ switch (*t) {
+
+ case SD_BUS_TYPE_BYTE:
+ case SD_BUS_TYPE_BOOLEAN:
+ case SD_BUS_TYPE_INT16:
+ case SD_BUS_TYPE_UINT16:
+ case SD_BUS_TYPE_INT32:
+ case SD_BUS_TYPE_UINT32:
+ case SD_BUS_TYPE_INT64:
+ case SD_BUS_TYPE_UINT64:
+ case SD_BUS_TYPE_DOUBLE:
+ case SD_BUS_TYPE_STRING:
+ case SD_BUS_TYPE_OBJECT_PATH:
+ case SD_BUS_TYPE_SIGNATURE:
+ case SD_BUS_TYPE_UNIX_FD: {
+ void *p;
+
+ p = va_arg(ap, void*);
+ r = sd_bus_message_read_basic(m, *t, p);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -ENXIO;
+
+ break;
+ }
+
+ case SD_BUS_TYPE_ARRAY: {
+ size_t k;
+
+ r = signature_element_length(t + 1, &k);
+ if (r < 0)
+ return r;
+
+ {
+ char s[k + 1];
+ memcpy(s, t + 1, k);
+ s[k] = 0;
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -ENXIO;
+ }
+
+ if (n_array == (unsigned) -1) {
+ types += k;
+ n_struct -= k;
+ }
+
+ r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
+ if (r < 0)
+ return r;
+
+ types = t + 1;
+ n_struct = k;
+ n_array = va_arg(ap, unsigned);
+
+ break;
+ }
+
+ case SD_BUS_TYPE_VARIANT: {
+ const char *s;
+
+ s = va_arg(ap, const char *);
+ if (!s)
+ return -EINVAL;
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, s);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -ENXIO;
+
+ r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
+ if (r < 0)
+ return r;
+
+ types = s;
+ n_struct = strlen(s);
+ n_array = (unsigned) -1;
+
+ break;
+ }
+
+ case SD_BUS_TYPE_STRUCT_BEGIN:
+ case SD_BUS_TYPE_DICT_ENTRY_BEGIN: {
+ size_t k;
+
+ r = signature_element_length(t, &k);
+ if (r < 0)
+ return r;
+
+ {
+ char s[k - 1];
+ memcpy(s, t + 1, k - 2);
+ s[k - 2] = 0;
+
+ r = sd_bus_message_enter_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -ENXIO;
+ }
+
+ if (n_array == (unsigned) -1) {
+ types += k - 1;
+ n_struct -= k - 1;
+ }
+
+ r = type_stack_push(stack, ELEMENTSOF(stack), &stack_ptr, types, n_struct, n_array);
+ if (r < 0)
+ return r;
+
+ types = t + 1;
+ n_struct = k - 2;
+ n_array = (unsigned) -1;
+
+ break;
+ }
+
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 1;
+}
+
+int sd_bus_message_read(sd_bus_message *m, const char *types, ...) {
+ va_list ap;
+ int r;
+
+ if (!m)
+ return -EINVAL;
+ if (!m->sealed)
+ return -EPERM;
+ if (!types)
+ return -EINVAL;
+
+ va_start(ap, types);
+ r = message_read_ap(m, types, ap);
+ va_end(ap);
+
+ return r;
+}
+
+static int message_peek_fields(
+ sd_bus_message *m,
+ size_t *rindex,
+ size_t align,
+ size_t nbytes,
+ void **ret) {
+
+ assert(m);
+ assert(rindex);
+ assert(align > 0);
+
+ return buffer_peek(m->fields, BUS_MESSAGE_FIELDS_SIZE(m), rindex, align, nbytes, ret);
+}
+
+static int message_peek_field_uint32(
+ sd_bus_message *m,
+ size_t *ri,
+ uint32_t *ret) {
+
+ int r;
+ void *q;
+
+ assert(m);
+ assert(ri);
+
+ r = message_peek_fields(m, ri, 4, 4, &q);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = BUS_MESSAGE_BSWAP32(m, *(uint32_t*) q);
+
+ return 0;
+}
+
+static int message_peek_field_string(
+ sd_bus_message *m,
+ bool (*validate)(const char *p),
+ size_t *ri,
+ const char **ret) {
+
+ uint32_t l;
+ int r;
+ void *q;
+
+ assert(m);
+ assert(ri);
+
+ r = message_peek_field_uint32(m, ri, &l);
+ if (r < 0)
+ return r;
+
+ r = message_peek_fields(m, ri, 1, l+1, &q);
+ if (r < 0)
+ return r;
+
+ if (validate) {
+ if (!validate_nul(q, l))
+ return -EBADMSG;
+
+ if (!validate(q))
+ return -EBADMSG;
+ } else {
+ if (!validate_string(q, l))
+ return -EBADMSG;
+ }
+
+ if (ret)
+ *ret = q;
+
+ return 0;
+}
+
+static int message_peek_field_signature(
+ sd_bus_message *m,
+ size_t *ri,
+ const char **ret) {
+
+ size_t l;
+ int r;
+ void *q;
+
+ assert(m);
+ assert(ri);
+
+ r = message_peek_fields(m, ri, 1, 1, &q);
+ if (r < 0)
+ return r;
+
+ l = *(uint8_t*) q;
+ r = message_peek_fields(m, ri, 1, l+1, &q);
+ if (r < 0)
+ return r;
+
+ if (!validate_signature(q, l))
+ return -EBADMSG;
+
+ if (ret)
+ *ret = q;
+
+ return 0;
+}
+
+static int message_skip_fields(
+ sd_bus_message *m,
+ size_t *ri,
+ uint32_t array_size,
+ const char **signature) {
+
+ size_t original_index;
+ int r;
+
+ assert(m);
+ assert(ri);
+ assert(signature);
+
+ original_index = *ri;
+
+ for (;;) {
+ char t;
+ size_t l;
+
+ if (array_size != (uint32_t) -1 &&
+ array_size <= *ri - original_index)
+ return 0;
+
+ t = **signature;
+ if (!t)
+ return 0;
+
+ if (t == SD_BUS_TYPE_STRING) {
+
+ r = message_peek_field_string(m, NULL, ri, NULL);
+ if (r < 0)
+ return r;
+
+ (*signature)++;
+
+ } else if (t == SD_BUS_TYPE_OBJECT_PATH) {
+
+ r = message_peek_field_string(m, object_path_is_valid, ri, NULL);
+ if (r < 0)
+ return r;
+
+ (*signature)++;
+
+ } else if (t == SD_BUS_TYPE_SIGNATURE) {
+
+ r = message_peek_field_signature(m, ri, NULL);
+ if (r < 0)
+ return r;
+
+ (*signature)++;
+
+ } else if (bus_type_is_basic(t)) {
+ ssize_t align, k;
+
+ align = bus_type_get_alignment(t);
+ k = bus_type_get_size(t);
+ assert(align > 0 && k > 0);
+
+ r = message_peek_fields(m, ri, align, k, NULL);
+ if (r < 0)
+ return r;
+
+ (*signature)++;
+
+ } else if (t == SD_BUS_TYPE_ARRAY) {
+
+ r = signature_element_length(*signature+1, &l);
+ if (r < 0)
+ return r;
+
+ assert(l >= 1);
+ {
+ char sig[l-1], *s;
+ uint32_t nas;
+ int alignment;
+
+ strncpy(sig, *signature + 1, l-1);
+ s = sig;
+
+ alignment = bus_type_get_alignment(sig[0]);
+ if (alignment < 0)
+ return alignment;
+
+ r = message_peek_field_uint32(m, ri, &nas);
+ if (r < 0)
+ return r;
+ if (nas > BUS_ARRAY_MAX_SIZE)
+ return -EBADMSG;
+
+ r = message_peek_fields(m, ri, alignment, 0, NULL);
+ if (r < 0)
+ return r;
+
+ r = message_skip_fields(m, ri, nas, (const char**) &s);
+ if (r < 0)
+ return r;
+ }
+
+ (*signature) += 1 + l;
+
+ } else if (t == SD_BUS_TYPE_VARIANT) {
+ const char *s;
+
+ r = message_peek_field_signature(m, ri, &s);
+ if (r < 0)
+ return r;
+
+ r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s);
+ if (r < 0)
+ return r;
+
+ (*signature)++;
+
+ } else if (t == SD_BUS_TYPE_STRUCT ||
+ t == SD_BUS_TYPE_DICT_ENTRY) {
+
+ r = signature_element_length(*signature, &l);
+ if (r < 0)
+ return r;
+
+ assert(l >= 2);
+ {
+ char sig[l-1], *s;
+ strncpy(sig, *signature + 1, l-1);
+ s = sig;
+
+ r = message_skip_fields(m, ri, (uint32_t) -1, (const char**) &s);
+ if (r < 0)
+ return r;
+ }
+
+ *signature += l;
+ } else
+ return -EINVAL;
+ }
+}
+
+int bus_message_parse_fields(sd_bus_message *m) {
+ size_t ri;
+ int r;
+ uint32_t unix_fds = 0;
+
+ assert(m);
+
+ for (ri = 0; ri < BUS_MESSAGE_FIELDS_SIZE(m); ) {
+ const char *signature;
+ uint8_t *header;
+
+ r = message_peek_fields(m, &ri, 8, 1, (void**) &header);
+ if (r < 0)
+ return r;
+
+ r = message_peek_field_signature(m, &ri, &signature);
+ if (r < 0)
+ return r;
+
+ switch (*header) {
+ case _SD_BUS_MESSAGE_HEADER_INVALID:
+ return -EBADMSG;
+
+ case SD_BUS_MESSAGE_HEADER_PATH:
+
+ if (m->path)
+ return -EBADMSG;
+
+ if (!streq(signature, "o"))
+ return -EBADMSG;
+
+ r = message_peek_field_string(m, object_path_is_valid, &ri, &m->path);
+ break;
+
+ case SD_BUS_MESSAGE_HEADER_INTERFACE:
+
+ if (m->interface)
+ return -EBADMSG;
+
+ if (!streq(signature, "s"))
+ return -EBADMSG;
+
+ r = message_peek_field_string(m, interface_name_is_valid, &ri, &m->interface);
+ break;
+
+ case SD_BUS_MESSAGE_HEADER_MEMBER:
+
+ if (m->member)
+ return -EBADMSG;
+
+ if (!streq(signature, "s"))
+ return -EBADMSG;
+
+ r = message_peek_field_string(m, member_name_is_valid, &ri, &m->member);
+ break;
+
+ case SD_BUS_MESSAGE_HEADER_ERROR_NAME:
+
+ if (m->error.name)
+ return -EBADMSG;
+
+ if (!streq(signature, "s"))
+ return -EBADMSG;
+
+ r = message_peek_field_string(m, error_name_is_valid, &ri, &m->error.name);
+ break;
+
+ case SD_BUS_MESSAGE_HEADER_DESTINATION:
+
+ if (m->destination)
+ return -EBADMSG;
+
+ if (!streq(signature, "s"))
+ return -EBADMSG;
+
+ r = message_peek_field_string(m, service_name_is_valid, &ri, &m->destination);
+ break;
+
+ case SD_BUS_MESSAGE_HEADER_SENDER:
+
+ if (m->sender)
+ return -EBADMSG;
+
+ if (!streq(signature, "s"))
+ return -EBADMSG;
+
+ r = message_peek_field_string(m, service_name_is_valid, &ri, &m->sender);
+ break;
+
+
+ case SD_BUS_MESSAGE_HEADER_SIGNATURE: {
+ const char *s;
+ char *c;
+
+ if (m->root_container.signature)
+ return -EBADMSG;
+
+ if (!streq(signature, "g"))
+ return -EBADMSG;
+
+ r = message_peek_field_signature(m, &ri, &s);
+ if (r < 0)
+ return r;
+
+ c = strdup(s);
+ if (!c)
+ return -ENOMEM;
+
+ free(m->root_container.signature);
+ m->root_container.signature = c;
+ break;
+ }
+
+ case SD_BUS_MESSAGE_HEADER_REPLY_SERIAL:
+ if (m->reply_serial != 0)
+ return -EBADMSG;
+
+ if (!streq(signature, "u"))
+ return -EBADMSG;
+
+ r = message_peek_field_uint32(m, &ri, &m->reply_serial);
+ if (r < 0)
+ return r;
+
+ if (m->reply_serial == 0)
+ return -EBADMSG;
+
+ break;
+
+ case SD_BUS_MESSAGE_HEADER_UNIX_FDS:
+ if (unix_fds != 0)
+ return -EBADMSG;
+
+ if (!streq(signature, "u"))
+ return -EBADMSG;
+
+ r = message_peek_field_uint32(m, &ri, &unix_fds);
+ if (r < 0)
+ return -EBADMSG;
+
+ if (unix_fds == 0)
+ return -EBADMSG;
+
+ break;
+
+ default:
+ r = message_skip_fields(m, &ri, (uint32_t) -1, (const char **) &signature);
+ }
+
+ if (r < 0)
+ return r;
+ }
+
+ if (m->n_fds != unix_fds)
+ return -EBADMSG;
+
+ if (isempty(m->root_container.signature) != (BUS_MESSAGE_BODY_SIZE(m) == 0))
+ return -EBADMSG;
+
+ switch (m->header->type) {
+
+ case SD_BUS_MESSAGE_TYPE_SIGNAL:
+ if (!m->path || !m->interface || !m->member)
+ return -EBADMSG;
+ break;
+
+ case SD_BUS_MESSAGE_TYPE_METHOD_CALL:
+
+ if (!m->path || !m->member)
+ return -EBADMSG;
+
+ break;
+
+ case SD_BUS_MESSAGE_TYPE_METHOD_RETURN:
+
+ if (m->reply_serial == 0)
+ return -EBADMSG;
+ break;
+
+ case SD_BUS_MESSAGE_TYPE_METHOD_ERROR:
+
+ if (m->reply_serial == 0 || !m->error.name)
+ return -EBADMSG;
+ break;
+ }
+
+ /* Try to read the error message, but if we can't it's a non-issue */
+ if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_ERROR)
+ sd_bus_message_read(m, "s", &m->error.message);
+
+ return 0;
+}
+
+int bus_message_seal(sd_bus_message *m, uint64_t serial) {
+ int r;
+ size_t l, a;
+
+ assert(m);
+
+ if (m->sealed)
+ return -EPERM;
+
+ if (m->n_containers > 0)
+ return -EBADMSG;
+
+ /* If there's a non-trivial signature set, then add it in here */
+ if (!isempty(m->root_container.signature)) {
+ r = message_append_field_signature(m, SD_BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL);
+ if (r < 0)
+ return r;
+ }
+
+ if (m->n_fds > 0) {
+ r = message_append_field_uint32(m, SD_BUS_MESSAGE_HEADER_UNIX_FDS, m->n_fds);
+ if (r < 0)
+ return r;
+ }
+
+ l = BUS_MESSAGE_FIELDS_SIZE(m);
+ a = ALIGN8(l) - l;
+
+ if (a > 0) {
+ /* Add padding at the end, since we know the body
+ * needs to start at an 8 byte alignment. */
+ void *p;
+
+ p = message_extend_fields(m, 1, a);
+ if (!p)
+ return -ENOMEM;
+
+ memset(p, 0, a);
+ m->header->fields_size -= a;
+ }
+
+ m->header->serial = serial;
+ m->sealed = true;
+
+ return 0;
+}
+
+int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) {
+ if (!m)
+ return -EINVAL;
+ if (!destination)
+ return -EINVAL;
+ if (m->sealed)
+ return -EPERM;
+ if (m->destination)
+ return -EEXIST;
+
+ return message_append_field_string(m, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination);
+}
+
+int bus_message_dump(sd_bus_message *m) {
+ char **cmdline = NULL;
+ unsigned level = 1;
+ int r;
+
+ assert(m);
+
+ printf("Message %p\n"
+ "\tn_ref=%u\n"
+ "\tendian=%c\n"
+ "\ttype=%i\n"
+ "\tflags=%u\n"
+ "\tversion=%u\n"
+ "\tserial=%u\n"
+ "\tfields_size=%u\n"
+ "\tbody_size=%u\n"
+ "\tpath=%s\n"
+ "\tinterface=%s\n"
+ "\tmember=%s\n"
+ "\tdestination=%s\n"
+ "\tsender=%s\n"
+ "\tsignature=%s\n"
+ "\treply_serial=%u\n"
+ "\terror.name=%s\n"
+ "\terror.message=%s\n"
+ "\tsealed=%s\n",
+ m,
+ m->n_ref,
+ m->header->endian,
+ m->header->type,
+ m->header->flags,
+ m->header->version,
+ BUS_MESSAGE_SERIAL(m),
+ BUS_MESSAGE_FIELDS_SIZE(m),
+ BUS_MESSAGE_BODY_SIZE(m),
+ strna(m->path),
+ strna(m->interface),
+ strna(m->member),
+ strna(m->destination),
+ strna(m->sender),
+ strna(m->root_container.signature),
+ m->reply_serial,
+ strna(m->error.name),
+ strna(m->error.message),
+ yes_no(m->sealed));
+
+ if (m->pid != 0)
+ printf("\tpid=%lu\n", (unsigned long) m->pid);
+ if (m->tid != 0)
+ printf("\ttid=%lu\n", (unsigned long) m->tid);
+ if (m->uid_valid)
+ printf("\tuid=%lu\n", (unsigned long) m->uid);
+ if (m->gid_valid)
+ printf("\tgid=%lu\n", (unsigned long) m->gid);
+ if (m->pid_starttime != 0)
+ printf("\tpid_starttime=%llu\n", (unsigned long long) m->pid_starttime);
+ if (m->monotonic != 0)
+ printf("\tmonotonic=%llu\n", (unsigned long long) m->monotonic);
+ if (m->realtime != 0)
+ printf("\trealtime=%llu\n", (unsigned long long) m->realtime);
+ if (m->exe)
+ printf("\texe=[%s]\n", m->exe);
+ if (m->comm)
+ printf("\tcomm=[%s]\n", m->comm);
+ if (m->tid_comm)
+ printf("\ttid_comm=[%s]\n", m->tid_comm);
+ if (m->label)
+ printf("\tlabel=[%s]\n", m->label);
+ if (m->cgroup)
+ printf("\tcgroup=[%s]\n", m->cgroup);
+
+ if (sd_bus_message_get_cmdline(m, &cmdline) >= 0) {
+ char **c;
+
+ fputs("\tcmdline=[", stdout);
+ STRV_FOREACH(c, cmdline) {
+ if (c != cmdline)
+ putchar(' ');
+
+ fputs(*c, stdout);
+ }
+
+ fputs("]\n", stdout);
+ }
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0) {
+ log_error("Failed to rewind: %s", strerror(-r));
+ return r;
+ }
+
+ printf("BEGIN_MESSAGE \"%s\" {\n", strempty(m->root_container.signature));
+
+ for(;;) {
+ _cleanup_free_ char *prefix = NULL;
+ const char *contents = NULL;
+ char type;
+ union {
+ uint8_t u8;
+ uint16_t u16;
+ int16_t s16;
+ uint32_t u32;
+ int32_t s32;
+ uint64_t u64;
+ int64_t s64;
+ double d64;
+ const char *string;
+ int i;
+ } basic;
+
+ r = sd_bus_message_peek_type(m, &type, &contents);
+ if (r < 0) {
+ log_error("Failed to peek type: %s", strerror(-r));
+ return r;
+ }
+ if (r == 0) {
+ if (level <= 1)
+ break;
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0) {
+ log_error("Failed to exit container: %s", strerror(-r));
+ return r;
+ }
+
+ level--;
+
+ prefix = strrep("\t", level);
+ if (!prefix)
+ return log_oom();
+
+ if (type == SD_BUS_TYPE_ARRAY)
+ printf("%s} END_ARRAY \n", prefix);
+ else if (type == SD_BUS_TYPE_VARIANT)
+ printf("%s} END_VARIANT\n", prefix);
+ else if (type == SD_BUS_TYPE_STRUCT)
+ printf("%s} END_STRUCT\n", prefix);
+ else if (type == SD_BUS_TYPE_DICT_ENTRY)
+ printf("%s} END_DICT_ENTRY\n", prefix);
+
+ continue;
+ }
+
+ prefix = strrep("\t", level);
+ if (!prefix)
+ return log_oom();
+
+ if (bus_type_is_container(type) > 0) {
+ r = sd_bus_message_enter_container(m, type, contents);
+ if (r < 0) {
+ log_error("Failed to enter container: %s", strerror(-r));
+ return r;
+ }
+
+ if (type == SD_BUS_TYPE_ARRAY)
+ printf("%sBEGIN_ARRAY \"%s\" {\n", prefix, contents);
+ else if (type == SD_BUS_TYPE_VARIANT)
+ printf("%sBEGIN_VARIANT \"%s\" {\n", prefix, contents);
+ else if (type == SD_BUS_TYPE_STRUCT)
+ printf("%sBEGIN_STRUCT \"%s\" {\n", prefix, contents);
+ else if (type == SD_BUS_TYPE_DICT_ENTRY)
+ printf("%sBEGIN_DICT_ENTRY \"%s\" {\n", prefix, contents);
+
+ level ++;
+
+ continue;
+ }
+
+ r = sd_bus_message_read_basic(m, type, &basic);
+ if (r < 0) {
+ log_error("Failed to get basic: %s", strerror(-r));
+ return r;
+ }
+
+ switch (type) {
+
+ case SD_BUS_TYPE_BYTE:
+ printf("%sBYTE: %u\n", prefix, basic.u8);
+ break;
+
+ case SD_BUS_TYPE_BOOLEAN:
+ printf("%sBOOLEAN: %s\n", prefix, yes_no(basic.i));
+ break;
+
+ case SD_BUS_TYPE_INT16:
+ printf("%sINT16: %i\n", prefix, basic.s16);
+ break;
+
+ case SD_BUS_TYPE_UINT16:
+ printf("%sUINT16: %u\n", prefix, basic.u16);
+ break;
+
+ case SD_BUS_TYPE_INT32:
+ printf("%sINT32: %i\n", prefix, basic.s32);
+ break;
+
+ case SD_BUS_TYPE_UINT32:
+ printf("%sUINT32: %u\n", prefix, basic.u32);
+ break;
+
+ case SD_BUS_TYPE_INT64:
+ printf("%sINT64: %lli\n", prefix, (long long) basic.s64);
+ break;
+
+ case SD_BUS_TYPE_UINT64:
+ printf("%sUINT64: %llu\n", prefix, (unsigned long long) basic.u64);
+ break;
+
+ case SD_BUS_TYPE_DOUBLE:
+ printf("%sDOUBLE: %g\n", prefix, basic.d64);
+ break;
+
+ case SD_BUS_TYPE_STRING:
+ printf("%sSTRING: \"%s\"\n", prefix, basic.string);
+ break;
+
+ case SD_BUS_TYPE_OBJECT_PATH:
+ printf("%sOBJECT_PATH: \"%s\"\n", prefix, basic.string);
+ break;
+
+ case SD_BUS_TYPE_SIGNATURE:
+ printf("%sSIGNATURE: \"%s\"\n", prefix, basic.string);
+ break;
+
+ case SD_BUS_TYPE_UNIX_FD:
+ printf("%sUNIX_FD: %i\n", prefix, basic.i);
+ break;
+
+ default:
+ assert_not_reached("Unknown basic type.");
+ }
+ }
+
+ printf("} END_MESSAGE\n");
+ return 0;
+}
+
+int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) {
+ size_t total;
+ void *p, *e;
+
+ assert(m);
+ assert(buffer);
+ assert(sz);
+
+ total = BUS_MESSAGE_SIZE(m);
+
+ p = malloc(total);
+ if (!p)
+ return -ENOMEM;
+
+ e = mempcpy(p, m->header, sizeof(*m->header));
+
+ if (m->fields) {
+ e = mempcpy(e, m->fields, m->header->fields_size);
+
+ if (m->header->fields_size % 8 != 0)
+ e = mempset(e, 0, 8 - (m->header->fields_size % 8));
+ }
+
+ if (m->body)
+ e = mempcpy(e, m->body, m->header->body_size);
+
+ assert(total == (size_t) ((uint8_t*) e - (uint8_t*) p));
+
+ *buffer = p;
+ *sz = total;
+
+ return 0;
+}
+
+int bus_message_read_strv_extend(sd_bus_message *m, char ***l) {
+ int r;
+
+ assert(m);
+ assert(l);
+
+ r = sd_bus_message_enter_container(m, 'a', "s");
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ const char *s;
+
+ r = sd_bus_message_read_basic(m, 's', &s);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = strv_extend(l, s);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+const char* bus_message_get_arg(sd_bus_message *m, unsigned i) {
+ int r;
+ const char *t = NULL;
+ unsigned j;
+
+ assert(m);
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return NULL;
+
+ for (j = 0; j <= i; j++) {
+ char type;
+
+ r = sd_bus_message_peek_type(m, &type, NULL);
+ if (r < 0)
+ return NULL;
+
+ if (type != SD_BUS_TYPE_STRING &&
+ type != SD_BUS_TYPE_OBJECT_PATH &&
+ type != SD_BUS_TYPE_SIGNATURE)
+ return NULL;
+
+ r = sd_bus_message_read_basic(m, type, &t);
+ if (r < 0)
+ return NULL;
+ }
+
+ return t;
+}
+
+int bus_header_size(struct bus_header *h, size_t *sum) {
+ size_t fs, bs;
+
+ assert(h);
+ assert(sum);
+
+ if (h->endian == SD_BUS_NATIVE_ENDIAN) {
+ fs = h->fields_size;
+ bs = h->body_size;
+ } else if (h->endian == SD_BUS_REVERSE_ENDIAN) {
+ fs = bswap_32(h->fields_size);
+ bs = bswap_32(h->body_size);
+ } else
+ return -EBADMSG;
+ *sum = sizeof(struct bus_header) + ALIGN8(fs) + bs;
return 0;
}
~ianmdlvl / elogind.git / blobdiff