if (m->poisoned)
return NULL;
- old_size = sizeof(struct bus_header) + m->fields_size;
+ old_size = sizeof(struct bus_header) + m->header->fields_size;
start = ALIGN_TO(old_size, align);
new_size = start + sz;
- if (new_size < start ||
- new_size > (size_t) ((uint32_t) -1))
- goto poison;
-
if (old_size == new_size)
return (uint8_t*) m->header + old_size;
+ if (new_size > (size_t) ((uint32_t) -1))
+ goto poison;
+
if (m->free_header) {
np = realloc(m->header, ALIGN8(new_size));
if (!np)
op = m->header;
m->header = np;
- m->fields_size = new_size - sizeof(struct bus_header);
+ m->header->fields_size = new_size - sizeof(struct bus_header);
/* Adjust quick access pointers */
m->path = adjust_pointer(m->path, op, old_size, m->header);
static int message_append_field_string(
sd_bus_message *m,
- uint64_t h,
+ uint8_t h,
char type,
const char *s,
const char **ret) {
assert(m);
- /* dbus1 only allows 8bit header field ids */
- if (h > 0xFF)
- return -EINVAL;
-
/* dbus1 doesn't allow strings over 32bit, let's enforce this
* globally, to not risk convertability */
l = strlen(s);
if (BUS_MESSAGE_IS_GVARIANT(m)) {
- /* (field id 64bit, ((string + NUL) + NUL + signature string 's') */
- p = message_extend_fields(m, 8, 8 + l + 1 + 1 + 1, true);
+ /* (field id byte + 7x padding, ((string + NUL) + NUL + signature string 's') */
+ p = message_extend_fields(m, 8, 1 + 7 + l + 1 + 1 + 1, true);
if (!p)
return -ENOMEM;
- *((uint64_t*) p) = h;
+ p[0] = h;
+ memzero(p+1, 7);
memcpy(p+8, s, l);
p[8+l] = 0;
p[8+l+1] = 0;
if (!p)
return -ENOMEM;
- p[0] = (uint8_t) h;
+ p[0] = h;
p[1] = 1;
p[2] = type;
p[3] = 0;
static int message_append_field_signature(
sd_bus_message *m,
- uint64_t h,
+ uint8_t h,
const char *s,
const char **ret) {
assert(m);
- /* dbus1 only allows 8bit header field ids */
- if (h > 0xFF)
- return -EINVAL;
-
- /* dbus1 doesn't allow signatures over 8bit, let's enforce
+ /* dbus1 doesn't allow signatures over 32bit, let's enforce
* this globally, to not risk convertability */
l = strlen(s);
if (l > 255)
if (!p)
return -ENOMEM;
- p[0] = (uint8_t) h;
+ p[0] = h;
p[1] = 1;
p[2] = SD_BUS_TYPE_SIGNATURE;
p[3] = 0;
return 0;
}
-static int message_append_field_uint32(sd_bus_message *m, uint64_t h, uint32_t x) {
+static int message_append_field_uint32(sd_bus_message *m, uint8_t h, uint32_t x) {
uint8_t *p;
assert(m);
- /* dbus1 only allows 8bit header field ids */
- if (h > 0xFF)
- return -EINVAL;
-
if (BUS_MESSAGE_IS_GVARIANT(m)) {
- /* (field id 64bit + ((value + NUL + signature string 'u') */
+ /* (field id byte + 7x padding + ((value + NUL + signature string 'u') */
- p = message_extend_fields(m, 8, 8 + 4 + 1 + 1, true);
+ p = message_extend_fields(m, 8, 1 + 7 + 4 + 1 + 1, true);
if (!p)
return -ENOMEM;
- *((uint64_t*) p) = h;
+ p[0] = h;
+ memzero(p+1, 7);
*((uint32_t*) (p + 8)) = x;
p[12] = 0;
p[13] = 'u';
if (!p)
return -ENOMEM;
- p[0] = (uint8_t) h;
+ p[0] = h;
p[1] = 1;
- p[2] = 'u';
+ p[2] = SD_BUS_TYPE_UINT32;
p[3] = 0;
((uint32_t*) p)[1] = x;
return 0;
}
-static int message_append_field_uint64(sd_bus_message *m, uint64_t h, uint64_t x) {
- uint8_t *p;
-
- assert(m);
-
- /* dbus1 only allows 8bit header field ids */
- if (h > 0xFF)
- return -EINVAL;
-
- if (BUS_MESSAGE_IS_GVARIANT(m)) {
- /* (field id 64bit + ((value + NUL + signature string 't') */
-
- p = message_extend_fields(m, 8, 8 + 8 + 1 + 1, true);
- if (!p)
- return -ENOMEM;
-
- *((uint64_t*) p) = h;
- *((uint64_t*) (p + 8)) = x;
- p[16] = 0;
- p[17] = 't';
- } else {
- /* (field id byte + (signature length + signature 't' + NUL) + 4 byte padding + value) */
- p = message_extend_fields(m, 8, 4 + 4 + 8, false);
- if (!p)
- return -ENOMEM;
-
- p[0] = (uint8_t) h;
- p[1] = 1;
- p[2] = 't';
- p[3] = 0;
- p[4] = 0;
- p[5] = 0;
- p[6] = 0;
- p[7] = 0;
-
- ((uint64_t*) p)[1] = x;
- }
-
- return 0;
-}
-
int bus_message_from_header(
sd_bus *bus,
- void *header,
- size_t header_accessible,
- void *footer,
- size_t footer_accessible,
- size_t message_size,
+ void *buffer,
+ size_t length,
int *fds,
unsigned n_fds,
const struct ucred *ucred,
size_t a, label_sz;
assert(bus);
- assert(header || header_accessible <= 0);
- assert(footer || footer_accessible <= 0);
+ assert(buffer || length <= 0);
assert(fds || n_fds <= 0);
assert(ret);
- if (header_accessible < sizeof(struct bus_header))
+ if (length < sizeof(struct bus_header))
return -EBADMSG;
- if (header_accessible > message_size)
- return -EBADMSG;
- if (footer_accessible > message_size)
- return -EBADMSG;
-
- h = header;
+ h = buffer;
if (h->version != 1 &&
h->version != 2)
return -EBADMSG;
+ if (h->serial == 0)
+ return -EBADMSG;
+
if (h->type == _SD_BUS_MESSAGE_TYPE_INVALID)
return -EBADMSG;
h->endian != BUS_BIG_ENDIAN)
return -EBADMSG;
- /* Note that we are happy with unknown flags in the flags header! */
-
a = ALIGN(sizeof(sd_bus_message)) + ALIGN(extra);
if (label) {
m->n_ref = 1;
m->sealed = true;
- m->header = header;
- m->header_accessible = header_accessible;
- m->footer = footer;
- m->footer_accessible = footer_accessible;
-
- if (BUS_MESSAGE_IS_GVARIANT(m)) {
- size_t ws;
-
- if (h->dbus2.cookie == 0)
- return -EBADMSG;
-
- /* dbus2 derives the sizes from the message size and
- the offset table at the end, since it is formatted as
- gvariant "yyyyuta{tv}v". Since the message itself is a
- structure with precisely to variable sized entries,
- there's only one offset in the table, which marks the
- end of the fields array. */
-
- ws = bus_gvariant_determine_word_size(message_size, 0);
- if (footer_accessible < ws)
- return -EBADMSG;
-
- m->fields_size = bus_gvariant_read_word_le((uint8_t*) footer + footer_accessible - ws, ws);
- if (ALIGN8(m->fields_size) > message_size - ws)
- return -EBADMSG;
- if (m->fields_size < sizeof(struct bus_header))
- return -EBADMSG;
-
- m->fields_size -= sizeof(struct bus_header);
- m->body_size = message_size - (sizeof(struct bus_header) + ALIGN8(m->fields_size));
- } else {
- if (h->dbus1.serial == 0)
- return -EBADMSG;
-
- /* dbus1 has the sizes in the header */
- m->fields_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.fields_size);
- m->body_size = BUS_MESSAGE_BSWAP32(m, h->dbus1.body_size);
-
- if (sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size != message_size)
- return -EBADMSG;
- }
-
+ m->header = h;
m->fds = fds;
m->n_fds = n_fds;
size_t sz;
int r;
- r = bus_message_from_header(
- bus,
- buffer, length, /* in this case the initial bytes and the final bytes are the same */
- buffer, length,
- length,
- fds, n_fds,
- ucred, label,
- 0, &m);
+ r = bus_message_from_header(bus, buffer, length, fds, n_fds, ucred, label, 0, &m);
if (r < 0)
return r;
- sz = length - sizeof(struct bus_header) - ALIGN8(m->fields_size);
+ if (length != BUS_MESSAGE_SIZE(m)) {
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ sz = length - sizeof(struct bus_header) - ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
if (sz > 0) {
m->n_body_parts = 1;
- m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(m->fields_size);
+ m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
m->body.size = sz;
m->body.sealed = true;
m->body.memfd = -1;
t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
t->reply_cookie = BUS_MESSAGE_COOKIE(call);
- if (t->reply_cookie == 0)
- return -ENOTSUP;
-
- if (BUS_MESSAGE_IS_GVARIANT(t))
- r = message_append_field_uint64(t, BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_cookie);
- else {
- if (t->reply_cookie > 0xffffffff)
- return -ENOTSUP;
- r = message_append_field_uint32(t, BUS_MESSAGE_HEADER_REPLY_SERIAL, (uint32_t) t->reply_cookie);
- }
+ r = message_append_field_uint32(t, BUS_MESSAGE_HEADER_REPLY_SERIAL, (uint32_t) t->reply_cookie);
if (r < 0)
goto fail;
}
_public_ int sd_bus_message_get_cookie(sd_bus_message *m, uint64_t *cookie) {
- uint64_t c;
-
assert_return(m, -EINVAL);
assert_return(cookie, -EINVAL);
-
- c = BUS_MESSAGE_COOKIE(m);
- if (c == 0)
- return -ENODATA;
+ assert_return(m->header->serial != 0, -ENODATA);
*cookie = BUS_MESSAGE_COOKIE(m);
return 0;
_public_ int sd_bus_message_get_reply_cookie(sd_bus_message *m, uint64_t *cookie) {
assert_return(m, -EINVAL);
assert_return(cookie, -EINVAL);
-
- if (m->reply_cookie == 0)
- return -ENODATA;
+ assert_return(m->reply_cookie != 0, -ENODATA);
*cookie = m->reply_cookie;
return 0;
return &m->creds;
}
-_public_ int sd_bus_message_is_signal(
- sd_bus_message *m,
- const char *interface,
- const char *member) {
-
+_public_ int sd_bus_message_is_signal(sd_bus_message *m,
+ const char *interface,
+ const char *member) {
assert_return(m, -EINVAL);
if (m->header->type != SD_BUS_MESSAGE_SIGNAL)
return 1;
}
-_public_ int sd_bus_message_is_method_call(
- sd_bus_message *m,
- const char *interface,
- const char *member) {
-
+_public_ int sd_bus_message_is_method_call(sd_bus_message *m,
+ const char *interface,
+ const char *member) {
assert_return(m, -EINVAL);
if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL)
}
}
-static void *message_extend_body(
- sd_bus_message *m,
- size_t align,
- size_t sz,
- bool add_offset,
- bool force_inline) {
-
+static void *message_extend_body(sd_bus_message *m, size_t align, size_t sz, bool add_offset) {
size_t start_body, end_body, padding, added;
void *p;
int r;
if (m->poisoned)
return NULL;
- start_body = ALIGN_TO((size_t) m->body_size, align);
+ start_body = ALIGN_TO((size_t) m->header->body_size, align);
end_body = start_body + sz;
- padding = start_body - m->body_size;
+ padding = start_body - m->header->body_size;
added = padding + sz;
/* Check for 32bit overflows */
- if (end_body > (size_t) ((uint32_t) -1) ||
- end_body < start_body) {
+ if (end_body > (size_t) ((uint32_t) -1)) {
m->poisoned = true;
return NULL;
}
add_new_part =
m->n_body_parts <= 0 ||
m->body_end->sealed ||
- (padding != ALIGN_TO(m->body_end->size, align) - m->body_end->size) ||
- (force_inline && m->body_end->size > MEMFD_MIN_SIZE); /* if this must be an inlined extension, let's create a new part if the previous part is large enough to be inlined */
+ padding != ALIGN_TO(m->body_end->size, align) - m->body_end->size;
if (add_new_part) {
if (padding > 0) {
/* Return something that is not NULL and is aligned */
p = (uint8_t *) NULL + align;
- m->body_size = end_body;
+ m->header->body_size = end_body;
message_extend_containers(m, added);
if (add_offset) {
assert(align > 0);
assert(sz > 0);
- a = message_extend_body(m, align, sz, true, false);
+ a = message_extend_body(m, align, sz, true);
if (!a)
return -ENOMEM;
assert(align > 0);
assert(sz > 0);
- a = message_extend_body(m, align, sz, false, false);
+ a = message_extend_body(m, align, sz, false);
if (!a)
return -ENOMEM;
}
if (BUS_MESSAGE_IS_GVARIANT(m)) {
- a = message_extend_body(m, 1, size + 1, true, false);
+ a = message_extend_body(m, 1, size + 1, true);
if (!a)
return -ENOMEM;
*s = a;
} else {
- a = message_extend_body(m, 4, 4 + size + 1, false, false);
+ a = message_extend_body(m, 4, 4 + size + 1, false);
if (!a)
return -ENOMEM;
return alignment;
/* Add alignment padding and add to offset list */
- if (!message_extend_body(m, alignment, 0, false, false))
+ if (!message_extend_body(m, alignment, 0, false))
return -ENOMEM;
r = bus_gvariant_is_fixed_size(contents);
if (r < 0)
return r;
- *begin = m->body_size;
+ *begin = m->header->body_size;
*need_offsets = r == 0;
} else {
void *a, *op;
if (alignment < 0)
return alignment;
- a = message_extend_body(m, 4, 4, false, false);
+ a = message_extend_body(m, 4, 4, false);
if (!a)
return -ENOMEM;
os = m->body_end->size;
/* Add alignment between size and first element */
- if (!message_extend_body(m, alignment, 0, false, false))
+ if (!message_extend_body(m, alignment, 0, false))
return -ENOMEM;
/* location of array size might have changed so let's readjust a */
if (BUS_MESSAGE_IS_GVARIANT(m)) {
/* Variants are always aligned to 8 */
- if (!message_extend_body(m, 8, 0, false, false))
+ if (!message_extend_body(m, 8, 0, false))
return -ENOMEM;
} else {
void *a;
l = strlen(contents);
- a = message_extend_body(m, 1, 1 + l + 1, false, false);
+ a = message_extend_body(m, 1, 1 + l + 1, false);
if (!a)
return -ENOMEM;
if (alignment < 0)
return alignment;
- if (!message_extend_body(m, alignment, 0, false, false))
+ if (!message_extend_body(m, alignment, 0, false))
return -ENOMEM;
r = bus_gvariant_is_fixed_size(contents);
if (r < 0)
return r;
- *begin = m->body_size;
+ *begin = m->header->body_size;
*need_offsets = r == 0;
} else {
/* Align contents to 8 byte boundary */
- if (!message_extend_body(m, 8, 0, false, false))
+ if (!message_extend_body(m, 8, 0, false))
return -ENOMEM;
}
if (alignment < 0)
return alignment;
- if (!message_extend_body(m, alignment, 0, false, false))
+ if (!message_extend_body(m, alignment, 0, false))
return -ENOMEM;
r = bus_gvariant_is_fixed_size(contents);
if (r < 0)
return r;
- *begin = m->body_size;
+ *begin = m->header->body_size;
*need_offsets = r == 0;
} else {
/* Align contents to 8 byte boundary */
- if (!message_extend_body(m, 8, 0, false, false))
+ if (!message_extend_body(m, 8, 0, false))
return -ENOMEM;
}
/* Save old index in the parent container, in case we have to
* abort this container */
c->saved_index = c->index;
- before = m->body_size;
+ before = m->header->body_size;
if (type == SD_BUS_TYPE_ARRAY)
r = bus_message_open_array(m, c, contents, &array_size, &begin, &need_offsets);
return 0;
}
+static size_t determine_word_size(size_t sz, size_t extra) {
+ if (sz + extra <= 0xFF)
+ return 1;
+ else if (sz + extra*2 <= 0xFFFF)
+ return 2;
+ else if (sz + extra*4 <= 0xFFFFFFFF)
+ return 4;
+ else
+ return 8;
+}
+
+static size_t read_word_le(void *p, size_t sz) {
+ union {
+ uint16_t u16;
+ uint32_t u32;
+ uint64_t u64;
+ } x;
+
+ assert(p);
+
+ if (sz == 1)
+ return *(uint8_t*) p;
+
+ memcpy(&x, p, sz);
+
+ if (sz == 2)
+ return le16toh(x.u16);
+ else if (sz == 4)
+ return le32toh(x.u32);
+ else if (sz == 8)
+ return le64toh(x.u64);
+
+ assert_not_reached("unknown word width");
+}
+
+static void write_word_le(void *p, size_t sz, size_t value) {
+ union {
+ uint16_t u16;
+ uint32_t u32;
+ uint64_t u64;
+ } x;
+
+ assert(p);
+ assert(sz == 8 || (value < (1ULL << (sz*8))));
+
+ if (sz == 1) {
+ *(uint8_t*) p = value;
+ return;
+ } else if (sz == 2)
+ x.u16 = htole16((uint16_t) value);
+ else if (sz == 4)
+ x.u32 = htole32((uint32_t) value);
+ else if (sz == 8)
+ x.u64 = htole64((uint64_t) value);
+ else
+ assert_not_reached("unknown word width");
+
+ memcpy(p, &x, sz);
+}
+
static int bus_message_close_array(sd_bus_message *m, struct bus_container *c) {
assert(m);
/* Variable-width arrays */
payload = c->n_offsets > 0 ? c->offsets[c->n_offsets-1] - c->begin : 0;
- sz = bus_gvariant_determine_word_size(payload, c->n_offsets);
+ sz = determine_word_size(payload, c->n_offsets);
- a = message_extend_body(m, 1, sz * c->n_offsets, true, false);
+ a = message_extend_body(m, 1, sz * c->n_offsets, true);
if (!a)
return -ENOMEM;
for (i = 0; i < c->n_offsets; i++)
- bus_gvariant_write_word_le(a + sz*i, sz, c->offsets[i] - c->begin);
+ write_word_le(a + sz*i, sz, c->offsets[i] - c->begin);
} else {
void *a;
/* Fixed-width or empty arrays */
- a = message_extend_body(m, 1, 0, true, false); /* let's add offset to parent */
+ a = message_extend_body(m, 1, 0, true); /* let's add offset to parent */
if (!a)
return -ENOMEM;
}
l = strlen(c->signature);
- a = message_extend_body(m, 1, 1 + l, true, false);
+ a = message_extend_body(m, 1, 1 + l, true);
if (!a)
return -ENOMEM;
assert(c->need_offsets || n_variable == 0);
if (n_variable <= 0) {
- a = message_extend_body(m, 1, 0, add_offset, false);
+ a = message_extend_body(m, 1, 0, add_offset);
if (!a)
return -ENOMEM;
} else {
size_t sz;
unsigned j;
- assert(c->offsets[c->n_offsets-1] == m->body_size);
+ assert(c->offsets[c->n_offsets-1] == m->header->body_size);
- sz = bus_gvariant_determine_word_size(m->body_size - c->begin, n_variable);
+ sz = determine_word_size(m->header->body_size - c->begin, n_variable);
- a = message_extend_body(m, 1, sz * n_variable, add_offset, false);
+ a = message_extend_body(m, 1, sz * n_variable, add_offset);
if (!a)
return -ENOMEM;
k = n_variable - 1 - j;
- bus_gvariant_write_word_le(a + k * sz, sz, c->offsets[i] - c->begin);
+ write_word_le(a + k * sz, sz, c->offsets[i] - c->begin);
j++;
}
if (r < 0)
return r;
- a = message_extend_body(m, align, size, false, false);
+ a = message_extend_body(m, align, size, false);
if (!a)
return -ENOMEM;
if (r < 0)
return r;
- a = message_extend_body(m, align, 0, false, false);
+ a = message_extend_body(m, align, 0, false);
if (!a)
return -ENOMEM;
part->size = size;
copy_fd = -1;
- m->body_size += size;
+ m->header->body_size += size;
message_extend_containers(m, size);
return sd_bus_message_close_container(m);
}
if (!BUS_MESSAGE_IS_GVARIANT(m)) {
- a = message_extend_body(m, 4, 4, false, false);
+ a = message_extend_body(m, 4, 4, false);
if (!a)
return -ENOMEM;
part->size = size;
copy_fd = -1;
- m->body_size += size;
+ m->header->body_size += size;
message_extend_containers(m, size);
if (BUS_MESSAGE_IS_GVARIANT(m)) {
- r = message_add_offset(m, m->body_size);
+ r = message_add_offset(m, m->header->body_size);
if (r < 0) {
m->poisoned = true;
return -ENOMEM;
}
static int bus_message_close_header(sd_bus_message *m) {
+ uint8_t *a;
+ size_t sz, i;
assert(m);
- /* The actual user data is finished now, we just complete the
- variant and struct now (at least on gvariant). Remember
- this position, so that during parsing we know where to to
- put the outer container end. */
- m->user_body_size = m->body_size;
-
- if (BUS_MESSAGE_IS_GVARIANT(m)) {
- const char *signature;
- size_t sz, l;
- void *d;
-
- /* Add offset table to end of fields array */
- if (m->n_header_offsets >= 1) {
- uint8_t *a;
- unsigned i;
-
- assert(m->fields_size == m->header_offsets[m->n_header_offsets-1]);
-
- sz = bus_gvariant_determine_word_size(m->fields_size, m->n_header_offsets);
- a = message_extend_fields(m, 1, sz * m->n_header_offsets, false);
- if (!a)
- return -ENOMEM;
-
- for (i = 0; i < m->n_header_offsets; i++)
- bus_gvariant_write_word_le(a + sz*i, sz, m->header_offsets[i]);
- }
-
- /* Add gvariant NUL byte plus signature to the end of
- * the body, followed by the final offset pointing to
- * the end of the fields array */
+ if (!BUS_MESSAGE_IS_GVARIANT(m))
+ return 0;
- signature = strempty(m->root_container.signature);
- l = strlen(signature);
+ if (m->n_header_offsets < 1)
+ return 0;
- sz = bus_gvariant_determine_word_size(sizeof(struct bus_header) + ALIGN8(m->fields_size) + m->body_size + 1 + l, 1);
- d = message_extend_body(m, 1, 1 + l + sz, false, true);
- if (!d)
- return -ENOMEM;
+ assert(m->header->fields_size == m->header_offsets[m->n_header_offsets-1]);
- *(uint8_t*) d = 0;
- memcpy((uint8_t*) d + 1, signature, l);
+ sz = determine_word_size(m->header->fields_size, m->n_header_offsets);
- bus_gvariant_write_word_le((uint8_t*) d + 1 + l, sz, sizeof(struct bus_header) + m->fields_size);
+ a = message_extend_fields(m, 1, sz * m->n_header_offsets, false);
+ if (!a)
+ return -ENOMEM;
- m->footer = d;
- m->footer_accessible = 1 + l + sz;
- } else {
- m->header->dbus1.fields_size = m->fields_size;
- m->header->dbus1.body_size = m->body_size;
- }
+ for (i = 0; i < m->n_header_offsets; i++)
+ write_word_le(a + sz*i, sz, m->header_offsets[i]);
return 0;
}
int bus_message_seal(sd_bus_message *m, uint64_t cookie, usec_t timeout) {
struct bus_body_part *part;
- size_t a;
+ size_t l, a;
unsigned i;
int r;
if (m->poisoned)
return -ESTALE;
- if (cookie > 0xffffffffULL &&
- !BUS_MESSAGE_IS_GVARIANT(m))
- return -ENOTSUP;
-
/* In vtables the return signature of method calls is listed,
* let's check if they match if this is a response */
if (m->header->type == SD_BUS_MESSAGE_METHOD_RETURN &&
if (r < 0)
return r;
- /* If there's a non-trivial signature set, then add it in
- * here, but only on dbus1 */
- if (!isempty(m->root_container.signature) && !BUS_MESSAGE_IS_GVARIANT(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, BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL);
if (r < 0)
return r;
if (r < 0)
return r;
- if (BUS_MESSAGE_IS_GVARIANT(m))
- m->header->dbus2.cookie = cookie;
- else
- m->header->dbus1.serial = (uint32_t) cookie;
-
+ m->header->serial = (uint32_t) cookie;
m->timeout = m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED ? 0 : timeout;
/* Add padding at the end of the fields part, since we know
* the body needs to start at an 8 byte alignment. We made
* sure we allocated enough space for this, so all we need to
* do here is to zero it out. */
- a = ALIGN8(m->fields_size) - m->fields_size;
+ l = BUS_MESSAGE_FIELDS_SIZE(m);
+ a = ALIGN8(l) - l;
if (a > 0)
- memzero((uint8_t*) BUS_MESSAGE_FIELDS(m) + m->fields_size, a);
+ memzero((uint8_t*) BUS_MESSAGE_FIELDS(m) + l, a);
/* If this is something we can send as memfd, then let's seal
the memfd now. Note that we can send memfds as payload only
for directed messages, and not for broadcasts. */
if (m->destination && m->bus->use_memfd) {
MESSAGE_FOREACH_PART(part, i, m)
- if (part->memfd >= 0 &&
- !part->sealed &&
- (part->size > MEMFD_MIN_SIZE || m->bus->use_memfd < 0) &&
- part != m->body_end) { /* The last part may never be sent as memfd */
+ if (part->memfd >= 0 && !part->sealed && (part->size > MEMFD_MIN_SIZE || m->bus->use_memfd < 0)) {
uint64_t sz;
/* Try to seal it if that makes
}
}
- m->root_container.end = m->user_body_size;
+ m->root_container.end = BUS_MESSAGE_BODY_SIZE(m);
m->root_container.index = 0;
m->root_container.offset_index = 0;
m->root_container.item_size = m->root_container.n_offsets > 0 ? m->root_container.offsets[0] : 0;
padding = start - *rindex;
end = start + nbytes;
- if (end > m->user_body_size)
+ if (end > BUS_MESSAGE_BODY_SIZE(m))
return -EBADMSG;
part = find_part(m, *rindex, padding, (void**) &q);
unsigned i;
/* gvariant: variable length array */
- sz = bus_gvariant_determine_word_size(c->item_size, 0);
+ sz = determine_word_size(c->item_size, 0);
where = rindex + c->item_size - sz;
r = message_peek_body(m, &where, 1, sz, &q);
if (r < 0)
return r;
- framing = bus_gvariant_read_word_le(q, sz);
+ framing = read_word_le(q, sz);
if (framing > c->item_size - sz)
return -EBADMSG;
if ((c->item_size - framing) % sz != 0)
for (i = 0; i < *n_offsets; i++) {
size_t x;
- x = bus_gvariant_read_word_le((uint8_t*) q + i * sz, sz);
+ x = read_word_le((uint8_t*) q + i * sz, sz);
if (x > c->item_size - sz)
return -EBADMSG;
if (x < p)
return 0;
}
- sz = bus_gvariant_determine_word_size(size, 0);
+ sz = determine_word_size(size, 0);
if (sz <= 0)
return -EBADMSG;
if (v > 0) {
v--;
- x = bus_gvariant_read_word_le((uint8_t*) q + v*sz, sz);
+ x = read_word_le((uint8_t*) q + v*sz, sz);
if (x >= size)
return -EBADMSG;
if (m->rindex + x < previous)
}
}
-_public_ int sd_bus_message_read_array(
- sd_bus_message *m,
- char type,
- const void **ptr,
- size_t *size) {
-
+_public_ int sd_bus_message_read_array(sd_bus_message *m,
+ char type,
+ const void **ptr,
+ size_t *size) {
struct bus_container *c;
void *p;
size_t sz;
assert(rindex);
assert(align > 0);
- return buffer_peek(BUS_MESSAGE_FIELDS(m), m->fields_size, rindex, align, nbytes, ret);
+ return buffer_peek(BUS_MESSAGE_FIELDS(m), BUS_MESSAGE_FIELDS_SIZE(m), rindex, align, nbytes, ret);
}
static int message_peek_field_uint32(
return 0;
}
-static int message_peek_field_uint64(
- sd_bus_message *m,
- size_t *ri,
- size_t item_size,
- uint64_t *ret) {
-
- int r;
- void *q;
-
- assert(m);
- assert(ri);
-
- if (BUS_MESSAGE_IS_GVARIANT(m) && item_size != 8)
- return -EBADMSG;
-
- /* identical for gvariant and dbus1 */
-
- r = message_peek_fields(m, ri, 8, 8, &q);
- if (r < 0)
- return r;
-
- if (ret)
- *ret = BUS_MESSAGE_BSWAP64(m, *(uint64_t*) q);
-
- return 0;
-}
-
static int message_peek_field_string(
sd_bus_message *m,
bool (*validate)(const char *p),
assert(m);
if (BUS_MESSAGE_IS_GVARIANT(m)) {
- char *p;
-
- /* Read the signature from the end of the body variant first */
- sz = bus_gvariant_determine_word_size(BUS_MESSAGE_SIZE(m), 0);
- if (m->footer_accessible < 1 + sz)
- return -EBADMSG;
-
- p = (char*) m->footer + m->footer_accessible - (1 + sz);
- for (;;) {
- if (p < (char*) m->footer)
- return -EBADMSG;
-
- if (*p == 0) {
- char *c;
-
- /* We found the beginning of the signature string, yay! */
-
- c = strndup(p + 1, ((char*) m->footer + m->footer_accessible) - p - (1 + sz));
- if (!c)
- return -ENOMEM;
-
- free(m->root_container.signature);
- m->root_container.signature = c;
- break;
- }
+ void *q;
- p--;
- }
-
- /* Calculate the actual user body size, by removing
- * the trailing variant signature and struct offset
- * table */
- m->user_body_size = m->body_size - ((char*) m->footer + m->footer_accessible - p);
-
- /* Pull out the offset table for the fields array */
- sz = bus_gvariant_determine_word_size(m->fields_size, 0);
+ sz = determine_word_size(BUS_MESSAGE_FIELDS_SIZE(m), 0);
if (sz > 0) {
size_t framing;
- void *q;
- ri = m->fields_size - sz;
+ ri = BUS_MESSAGE_FIELDS_SIZE(m) - sz;
r = message_peek_fields(m, &ri, 1, sz, &q);
if (r < 0)
return r;
- framing = bus_gvariant_read_word_le(q, sz);
- if (framing >= m->fields_size - sz)
+ framing = read_word_le(q, sz);
+ if (framing >= BUS_MESSAGE_FIELDS_SIZE(m) - sz)
return -EBADMSG;
- if ((m->fields_size - framing) % sz != 0)
+ if ((BUS_MESSAGE_FIELDS_SIZE(m) - framing) % sz != 0)
return -EBADMSG;
ri = framing;
- r = message_peek_fields(m, &ri, 1, m->fields_size - framing, &offsets);
+ r = message_peek_fields(m, &ri, 1, BUS_MESSAGE_FIELDS_SIZE(m) - framing, &offsets);
if (r < 0)
return r;
- n_offsets = (m->fields_size - framing) / sz;
+ n_offsets = (BUS_MESSAGE_FIELDS_SIZE(m) - framing) / sz;
}
- } else
- m->user_body_size = m->body_size;
+ }
ri = 0;
- while (ri < m->fields_size) {
+ while (ri < BUS_MESSAGE_FIELDS_SIZE(m)) {
_cleanup_free_ char *sig = NULL;
const char *signature;
- uint64_t field_type;
+ uint8_t *header;
size_t item_size = (size_t) -1;
if (BUS_MESSAGE_IS_GVARIANT(m)) {
- uint64_t *u64;
-
if (i >= n_offsets)
break;
if (i == 0)
ri = 0;
else
- ri = ALIGN_TO(bus_gvariant_read_word_le((uint8_t*) offsets + (i-1)*sz, sz), 8);
-
- r = message_peek_fields(m, &ri, 8, 8, (void**) &u64);
- if (r < 0)
- return r;
-
- field_type = BUS_MESSAGE_BSWAP64(m, *u64);
- } else {
- uint8_t *u8;
-
- r = message_peek_fields(m, &ri, 8, 1, (void**) &u8);
- if (r < 0)
- return r;
-
- field_type = *u8;
+ ri = ALIGN_TO(read_word_le((uint8_t*) offsets + (i-1)*sz, sz), 8);
}
+ r = message_peek_fields(m, &ri, 8, 1, (void**) &header);
+ if (r < 0)
+ return r;
+
if (BUS_MESSAGE_IS_GVARIANT(m)) {
size_t where, end;
char *b;
void *q;
- end = bus_gvariant_read_word_le((uint8_t*) offsets + i*sz, sz);
+ end = read_word_le((uint8_t*) offsets + i*sz, sz);
if (end < ri)
return -EBADMSG;
return r;
}
- switch (field_type) {
-
+ switch (*header) {
case _BUS_MESSAGE_HEADER_INVALID:
return -EBADMSG;
const char *s;
char *c;
- if (BUS_MESSAGE_IS_GVARIANT(m)) /* only applies to dbus1 */
- return -EBADMSG;
-
if (m->root_container.signature)
return -EBADMSG;
break;
}
- case BUS_MESSAGE_HEADER_REPLY_SERIAL:
+ case BUS_MESSAGE_HEADER_REPLY_SERIAL: {
+ uint32_t serial;
if (m->reply_cookie != 0)
return -EBADMSG;
- if (BUS_MESSAGE_IS_GVARIANT(m)) {
- /* 64bit on dbus2 */
-
- if (!streq(signature, "t"))
- return -EBADMSG;
-
- r = message_peek_field_uint64(m, &ri, item_size, &m->reply_cookie);
- if (r < 0)
- return r;
- } else {
- /* 32bit on dbus1 */
- uint32_t serial;
-
- if (!streq(signature, "u"))
- return -EBADMSG;
+ if (!streq(signature, "u"))
+ return -EBADMSG;
- r = message_peek_field_uint32(m, &ri, item_size, &serial);
- if (r < 0)
- return r;
+ r = message_peek_field_uint32(m, &ri, item_size, &serial);
+ if (r < 0)
+ return r;
- m->reply_cookie = serial;
- }
+ m->reply_cookie = serial;
if (m->reply_cookie == 0)
return -EBADMSG;
break;
+ }
case BUS_MESSAGE_HEADER_UNIX_FDS:
if (unix_fds_set)
if (streq_ptr(m->sender, "org.freedesktop.DBus.Local"))
return -EBADMSG;
- m->root_container.end = m->user_body_size;
+ m->root_container.end = BUS_MESSAGE_BODY_SIZE(m);
if (BUS_MESSAGE_IS_GVARIANT(m)) {
r = build_struct_offsets(
m,
m->root_container.signature,
- m->user_body_size,
+ BUS_MESSAGE_BODY_SIZE(m),
&m->root_container.item_size,
&m->root_container.offsets,
&m->root_container.n_offsets);
return 0;
}
+bool bus_header_is_complete(struct bus_header *h, size_t size) {
+ size_t full;
+
+ assert(h);
+ assert(size);
+
+ if (size < sizeof(struct bus_header))
+ return false;
+
+ full = sizeof(struct bus_header) +
+ (h->endian == BUS_NATIVE_ENDIAN ? h->fields_size : bswap_32(h->fields_size));
+
+ return size >= full;
+}
+
+int bus_header_message_size(struct bus_header *h, size_t *sum) {
+ size_t fs, bs;
+
+ assert(h);
+ assert(sum);
+
+ if (h->endian == BUS_NATIVE_ENDIAN) {
+ fs = h->fields_size;
+ bs = h->body_size;
+ } else if (h->endian == 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;
+}
+
_public_ int sd_bus_message_get_errno(sd_bus_message *m) {
assert_return(m, EINVAL);
~ianmdlvl / elogind.git / blobdiff