4471 lines
123 KiB
C
4471 lines
123 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2013 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include "util.h"
|
|
#include "utf8.h"
|
|
#include "strv.h"
|
|
#include "time-util.h"
|
|
#include "cgroup-util.h"
|
|
|
|
#include "sd-bus.h"
|
|
#include "bus-message.h"
|
|
#include "bus-internal.h"
|
|
#include "bus-type.h"
|
|
#include "bus-signature.h"
|
|
|
|
static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored);
|
|
|
|
static void *adjust_pointer(const void *p, void *old_base, size_t sz, void *new_base) {
|
|
|
|
if (p == NULL)
|
|
return NULL;
|
|
|
|
if (old_base == new_base)
|
|
return (void*) p;
|
|
|
|
if ((uint8_t*) p < (uint8_t*) old_base)
|
|
return (void*) p;
|
|
|
|
if ((uint8_t*) p >= (uint8_t*) old_base + sz)
|
|
return (void*) p;
|
|
|
|
return (uint8_t*) new_base + ((uint8_t*) p - (uint8_t*) old_base);
|
|
}
|
|
|
|
static void message_free_part(sd_bus_message *m, struct bus_body_part *part) {
|
|
assert(m);
|
|
assert(part);
|
|
|
|
if (part->memfd >= 0) {
|
|
/* If we can reuse the memfd, try that. For that it
|
|
* can't be sealed yet. */
|
|
|
|
if (!part->sealed)
|
|
bus_kernel_push_memfd(m->bus, part->memfd, part->data, part->mapped);
|
|
else {
|
|
if (part->mapped > 0)
|
|
assert_se(munmap(part->data, part->mapped) == 0);
|
|
|
|
close_nointr_nofail(part->memfd);
|
|
}
|
|
|
|
} else if (part->munmap_this)
|
|
munmap(part->data, part->mapped);
|
|
else if (part->free_this)
|
|
free(part->data);
|
|
|
|
if (part != &m->body)
|
|
free(part);
|
|
}
|
|
|
|
static void message_reset_parts(sd_bus_message *m) {
|
|
struct bus_body_part *part;
|
|
|
|
assert(m);
|
|
|
|
part = &m->body;
|
|
while (m->n_body_parts > 0) {
|
|
struct bus_body_part *next = part->next;
|
|
message_free_part(m, part);
|
|
part = next;
|
|
m->n_body_parts--;
|
|
}
|
|
|
|
m->body_end = NULL;
|
|
|
|
m->cached_rindex_part = NULL;
|
|
m->cached_rindex_part_begin = 0;
|
|
}
|
|
|
|
static void message_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);
|
|
|
|
message_reset_parts(m);
|
|
|
|
if (m->free_kdbus)
|
|
free(m->kdbus);
|
|
|
|
if (m->release_kdbus) {
|
|
uint64_t off;
|
|
|
|
off = (uint8_t *)m->kdbus - (uint8_t *)m->bus->kdbus_buffer;
|
|
ioctl(m->bus->input_fd, KDBUS_CMD_MSG_RELEASE, &off);
|
|
}
|
|
|
|
if (m->bus)
|
|
sd_bus_unref(m->bus);
|
|
|
|
if (m->free_fds) {
|
|
close_many(m->fds, m->n_fds);
|
|
free(m->fds);
|
|
}
|
|
|
|
if (m->iovec != m->iovec_fixed)
|
|
free(m->iovec);
|
|
|
|
free(m->cmdline_array);
|
|
|
|
message_reset_containers(m);
|
|
free(m->root_container.signature);
|
|
|
|
free(m->peeked_signature);
|
|
|
|
free(m->unit);
|
|
free(m->user_unit);
|
|
free(m->session);
|
|
free(m);
|
|
}
|
|
|
|
static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz) {
|
|
void *op, *np;
|
|
size_t old_size, new_size, start;
|
|
|
|
assert(m);
|
|
|
|
if (m->poisoned)
|
|
return NULL;
|
|
|
|
old_size = sizeof(struct bus_header) + m->header->fields_size;
|
|
start = ALIGN_TO(old_size, align);
|
|
new_size = start + sz;
|
|
|
|
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)
|
|
goto poison;
|
|
} else {
|
|
/* Initially, the header is allocated as part of of
|
|
* the sd_bus_message itself, let's replace it by
|
|
* dynamic data */
|
|
|
|
np = malloc(ALIGN8(new_size));
|
|
if (!np)
|
|
goto poison;
|
|
|
|
memcpy(np, m->header, sizeof(struct bus_header));
|
|
}
|
|
|
|
/* Zero out padding */
|
|
if (start > old_size)
|
|
memset((uint8_t*) np + old_size, 0, start - old_size);
|
|
|
|
op = m->header;
|
|
m->header = np;
|
|
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);
|
|
m->interface = adjust_pointer(m->interface, op, old_size, m->header);
|
|
m->member = adjust_pointer(m->member, op, old_size, m->header);
|
|
m->destination = adjust_pointer(m->destination, op, old_size, m->header);
|
|
m->sender = adjust_pointer(m->sender, op, old_size, m->header);
|
|
m->error.name = adjust_pointer(m->error.name, op, old_size, m->header);
|
|
|
|
m->free_header = true;
|
|
|
|
return (uint8_t*) np + start;
|
|
|
|
poison:
|
|
m->poisoned = true;
|
|
return NULL;
|
|
}
|
|
|
|
static int message_append_field_string(
|
|
sd_bus_message *m,
|
|
uint8_t h,
|
|
char type,
|
|
const char *s,
|
|
const char **ret) {
|
|
|
|
size_t l;
|
|
uint8_t *p;
|
|
|
|
assert(m);
|
|
|
|
l = strlen(s);
|
|
if (l > (size_t) (uint32_t) -1)
|
|
return -EINVAL;
|
|
|
|
/* field id byte + signature length + signature 's' + NUL + string length + string + NUL */
|
|
p = message_extend_fields(m, 8, 4 + 4 + l + 1);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
p[0] = h;
|
|
p[1] = 1;
|
|
p[2] = type;
|
|
p[3] = 0;
|
|
|
|
((uint32_t*) p)[1] = l;
|
|
memcpy(p + 8, s, l + 1);
|
|
|
|
if (ret)
|
|
*ret = (char*) p + 8;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int message_append_field_signature(
|
|
sd_bus_message *m,
|
|
uint8_t h,
|
|
const char *s,
|
|
const char **ret) {
|
|
|
|
size_t l;
|
|
uint8_t *p;
|
|
|
|
assert(m);
|
|
|
|
l = strlen(s);
|
|
if (l > 255)
|
|
return -EINVAL;
|
|
|
|
/* field id byte + signature length + signature 'g' + NUL + string length + string + NUL */
|
|
p = message_extend_fields(m, 8, 4 + 1 + l + 1);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
p[0] = h;
|
|
p[1] = 1;
|
|
p[2] = SD_BUS_TYPE_SIGNATURE;
|
|
p[3] = 0;
|
|
p[4] = l;
|
|
memcpy(p + 5, s, l + 1);
|
|
|
|
if (ret)
|
|
*ret = (const char*) p + 5;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int message_append_field_uint32(sd_bus_message *m, uint8_t h, uint32_t x) {
|
|
uint8_t *p;
|
|
|
|
assert(m);
|
|
|
|
/* field id byte + signature length + signature 'u' + NUL + value */
|
|
p = message_extend_fields(m, 8, 4 + 4);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
p[0] = h;
|
|
p[1] = 1;
|
|
p[2] = SD_BUS_TYPE_UINT32;
|
|
p[3] = 0;
|
|
|
|
((uint32_t*) p)[1] = x;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int bus_message_from_header(
|
|
sd_bus *bus,
|
|
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);
|
|
}
|
|
|
|
if (bus)
|
|
m->bus = sd_bus_ref(bus);
|
|
|
|
*ret = m;
|
|
return 0;
|
|
}
|
|
|
|
int bus_message_from_malloc(
|
|
sd_bus *bus,
|
|
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(bus, 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->n_body_parts = 1;
|
|
m->body.data = (uint8_t*) buffer + sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
|
|
m->body.size = length - sizeof(struct bus_header) - ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
|
|
m->body.sealed = true;
|
|
m->body.memfd = -1;
|
|
|
|
m->n_iovec = 1;
|
|
m->iovec = m->iovec_fixed;
|
|
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(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)));
|
|
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);
|
|
|
|
if (bus)
|
|
m->bus = sd_bus_ref(bus);
|
|
|
|
return m;
|
|
}
|
|
|
|
_public_ int sd_bus_message_new_signal(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *member,
|
|
sd_bus_message **m) {
|
|
|
|
sd_bus_message *t;
|
|
int r;
|
|
|
|
assert_return(!bus || bus->state != BUS_UNSET, -ENOTCONN);
|
|
assert_return(object_path_is_valid(path), -EINVAL);
|
|
assert_return(interface_name_is_valid(interface), -EINVAL);
|
|
assert_return(member_name_is_valid(member), -EINVAL);
|
|
assert_return(m, -EINVAL);
|
|
|
|
t = message_new(bus, SD_BUS_MESSAGE_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;
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface);
|
|
if (r < 0)
|
|
goto fail;
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
*m = t;
|
|
return 0;
|
|
|
|
fail:
|
|
sd_bus_message_unref(t);
|
|
return r;
|
|
}
|
|
|
|
_public_ int sd_bus_message_new_method_call(
|
|
sd_bus *bus,
|
|
const char *destination,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *member,
|
|
sd_bus_message **m) {
|
|
|
|
sd_bus_message *t;
|
|
int r;
|
|
|
|
assert_return(!bus || bus->state != BUS_UNSET, -ENOTCONN);
|
|
assert_return(!destination || service_name_is_valid(destination), -EINVAL);
|
|
assert_return(object_path_is_valid(path), -EINVAL);
|
|
assert_return(!interface || interface_name_is_valid(interface), -EINVAL);
|
|
assert_return(member_name_is_valid(member), -EINVAL);
|
|
assert_return(m, -EINVAL);
|
|
|
|
t = message_new(bus, SD_BUS_MESSAGE_METHOD_CALL);
|
|
if (!t)
|
|
return -ENOMEM;
|
|
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path);
|
|
if (r < 0)
|
|
goto fail;
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_MEMBER, SD_BUS_TYPE_STRING, member, &t->member);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
if (interface) {
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_INTERFACE, SD_BUS_TYPE_STRING, interface, &t->interface);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
if (destination) {
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &t->destination);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
*m = t;
|
|
return 0;
|
|
|
|
fail:
|
|
message_free(t);
|
|
return r;
|
|
}
|
|
|
|
static int message_new_reply(
|
|
sd_bus_message *call,
|
|
uint8_t type,
|
|
sd_bus_message **m) {
|
|
|
|
sd_bus_message *t;
|
|
int r;
|
|
|
|
assert_return(call, -EINVAL);
|
|
assert_return(call->sealed, -EPERM);
|
|
assert_return(call->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL);
|
|
assert_return(!call->bus || call->bus->state != BUS_UNSET, -ENOTCONN);
|
|
assert_return(m, -EINVAL);
|
|
|
|
t = message_new(call->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);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
if (call->sender) {
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, call->sender, &t->destination);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
t->dont_send = !!(call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED);
|
|
|
|
*m = t;
|
|
return 0;
|
|
|
|
fail:
|
|
message_free(t);
|
|
return r;
|
|
}
|
|
|
|
_public_ int sd_bus_message_new_method_return(
|
|
sd_bus_message *call,
|
|
sd_bus_message **m) {
|
|
|
|
return message_new_reply(call, SD_BUS_MESSAGE_METHOD_RETURN, m);
|
|
}
|
|
|
|
_public_ int sd_bus_message_new_method_error(
|
|
sd_bus_message *call,
|
|
const sd_bus_error *e,
|
|
sd_bus_message **m) {
|
|
|
|
sd_bus_message *t;
|
|
int r;
|
|
|
|
assert_return(sd_bus_error_is_set(e), -EINVAL);
|
|
assert_return(m, -EINVAL);
|
|
|
|
r = message_new_reply(call, SD_BUS_MESSAGE_METHOD_ERROR, &t);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
if (e->message) {
|
|
r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
*m = t;
|
|
return 0;
|
|
|
|
fail:
|
|
message_free(t);
|
|
return r;
|
|
}
|
|
|
|
_public_ int sd_bus_message_new_method_errorf(
|
|
sd_bus_message *call,
|
|
sd_bus_message **m,
|
|
const char *name,
|
|
const char *format,
|
|
...) {
|
|
|
|
_cleanup_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
va_list ap;
|
|
int r;
|
|
|
|
assert_return(name, -EINVAL);
|
|
assert_return(m, -EINVAL);
|
|
|
|
va_start(ap, format);
|
|
r = bus_error_setfv(&error, name, format, ap);
|
|
va_end(ap);
|
|
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return sd_bus_message_new_method_error(call, &error, m);
|
|
}
|
|
|
|
_public_ int sd_bus_message_new_method_errno(
|
|
sd_bus_message *call,
|
|
int error,
|
|
const sd_bus_error *p,
|
|
sd_bus_message **m) {
|
|
|
|
_cleanup_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
|
|
|
|
if (sd_bus_error_is_set(p))
|
|
return sd_bus_message_new_method_error(call, p, m);
|
|
|
|
sd_bus_error_set_errno(&berror, error);
|
|
|
|
return sd_bus_message_new_method_error(call, &berror, m);
|
|
}
|
|
|
|
_public_ int sd_bus_message_new_method_errnof(
|
|
sd_bus_message *call,
|
|
sd_bus_message **m,
|
|
int error,
|
|
const char *format,
|
|
...) {
|
|
|
|
_cleanup_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
|
|
va_list ap;
|
|
int r;
|
|
|
|
va_start(ap, format);
|
|
r = bus_error_set_errnofv(&berror, error, format, ap);
|
|
va_end(ap);
|
|
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return sd_bus_message_new_method_error(call, &berror, m);
|
|
}
|
|
|
|
int bus_message_new_synthetic_error(
|
|
sd_bus *bus,
|
|
uint64_t serial,
|
|
const sd_bus_error *e,
|
|
sd_bus_message **m) {
|
|
|
|
sd_bus_message *t;
|
|
int r;
|
|
|
|
assert(sd_bus_error_is_set(e));
|
|
assert(m);
|
|
|
|
t = message_new(bus, SD_BUS_MESSAGE_METHOD_ERROR);
|
|
if (!t)
|
|
return -ENOMEM;
|
|
|
|
t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
|
|
t->reply_serial = serial;
|
|
|
|
r = message_append_field_uint32(t, SD_BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
if (bus && bus->unique_name) {
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, bus->unique_name, &t->destination);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_ERROR_NAME, SD_BUS_TYPE_STRING, e->name, &t->error.name);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
if (e->message) {
|
|
r = message_append_basic(t, SD_BUS_TYPE_STRING, e->message, (const void**) &t->error.message);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
*m = t;
|
|
return 0;
|
|
|
|
fail:
|
|
message_free(t);
|
|
return r;
|
|
}
|
|
|
|
_public_ sd_bus_message* sd_bus_message_ref(sd_bus_message *m) {
|
|
assert_return(m, NULL);
|
|
|
|
assert(m->n_ref > 0);
|
|
m->n_ref++;
|
|
|
|
return m;
|
|
}
|
|
|
|
_public_ sd_bus_message* sd_bus_message_unref(sd_bus_message *m) {
|
|
assert_return(m, NULL);
|
|
|
|
assert(m->n_ref > 0);
|
|
m->n_ref--;
|
|
|
|
if (m->n_ref <= 0)
|
|
message_free(m);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_type(sd_bus_message *m, uint8_t *type) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(type, -EINVAL);
|
|
|
|
*type = m->header->type;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_serial(sd_bus_message *m, uint64_t *serial) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(serial, -EINVAL);
|
|
assert_return(m->header->serial != 0, -ENOENT);
|
|
|
|
*serial = BUS_MESSAGE_SERIAL(m);
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_reply_serial(sd_bus_message *m, uint64_t *serial) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(serial, -EINVAL);
|
|
assert_return(m->reply_serial != 0, -ENOENT);
|
|
|
|
*serial = m->reply_serial;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_no_reply(sd_bus_message *m) {
|
|
assert_return(m, -EINVAL);
|
|
|
|
return m->header->type == SD_BUS_MESSAGE_METHOD_CALL ? !!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) : 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_no_auto_start(sd_bus_message *m) {
|
|
assert_return(m, -EINVAL);
|
|
|
|
return !!(m->header->flags & SD_BUS_MESSAGE_NO_AUTO_START);
|
|
}
|
|
|
|
_public_ const char *sd_bus_message_get_path(sd_bus_message *m) {
|
|
assert_return(m, NULL);
|
|
|
|
return m->path;
|
|
}
|
|
|
|
_public_ const char *sd_bus_message_get_interface(sd_bus_message *m) {
|
|
assert_return(m, NULL);
|
|
|
|
return m->interface;
|
|
}
|
|
|
|
_public_ const char *sd_bus_message_get_member(sd_bus_message *m) {
|
|
assert_return(m, NULL);
|
|
|
|
return m->member;
|
|
}
|
|
|
|
_public_ const char *sd_bus_message_get_destination(sd_bus_message *m) {
|
|
assert_return(m, NULL);
|
|
|
|
return m->destination;
|
|
}
|
|
|
|
_public_ const char *sd_bus_message_get_sender(sd_bus_message *m) {
|
|
assert_return(m, NULL);
|
|
|
|
return m->sender;
|
|
}
|
|
|
|
_public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) {
|
|
assert_return(m, NULL);
|
|
assert_return(sd_bus_error_is_set(&m->error), NULL);
|
|
|
|
return &m->error;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_uid(sd_bus_message *m, uid_t *uid) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(uid, -EINVAL);
|
|
assert_return(m->uid_valid, -ESRCH);
|
|
|
|
*uid = m->uid;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_gid(sd_bus_message *m, gid_t *gid) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(gid, -EINVAL);
|
|
assert_return(m->gid_valid, -ESRCH);
|
|
|
|
*gid = m->gid;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_pid(sd_bus_message *m, pid_t *pid) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(pid, -EINVAL);
|
|
assert_return(m->pid > 0, -ESRCH);
|
|
|
|
*pid = m->pid;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_tid(sd_bus_message *m, pid_t *tid) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(tid, -EINVAL);
|
|
assert_return(m->tid > 0, -ESRCH);
|
|
|
|
*tid = m->tid;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_pid_starttime(sd_bus_message *m, uint64_t *usec) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(usec, -EINVAL);
|
|
assert_return(m->pid_starttime > 0, -ESRCH);
|
|
|
|
*usec = m->pid_starttime;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_selinux_context(sd_bus_message *m, const char **ret) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->label, -ESRCH);
|
|
|
|
*ret = m->label;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_monotonic_timestamp(sd_bus_message *m, uint64_t *usec) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(usec, -EINVAL);
|
|
assert_return(m->monotonic > 0, -ESRCH);
|
|
|
|
*usec = m->monotonic;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_realtime_timestamp(sd_bus_message *m, uint64_t *usec) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(usec, -EINVAL);
|
|
assert_return(m->realtime > 0, -ESRCH);
|
|
|
|
*usec = m->realtime;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_comm(sd_bus_message *m, const char **ret) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
assert_return(m->comm, -ESRCH);
|
|
|
|
*ret = m->comm;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_tid_comm(sd_bus_message *m, const char **ret) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
assert_return(m->tid_comm, -ESRCH);
|
|
|
|
*ret = m->tid_comm;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_exe(sd_bus_message *m, const char **ret) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
assert_return(m->exe, -ESRCH);
|
|
|
|
*ret = m->exe;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_cgroup(sd_bus_message *m, const char **ret) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
assert_return(m->cgroup, -ESRCH);
|
|
|
|
*ret = m->cgroup;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_unit(sd_bus_message *m, const char **ret) {
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
assert_return(m->cgroup, -ESRCH);
|
|
|
|
if (!m->unit) {
|
|
r = cg_path_get_unit(m->cgroup, &m->unit);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
*ret = m->unit;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_user_unit(sd_bus_message *m, const char **ret) {
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
assert_return(m->cgroup, -ESRCH);
|
|
|
|
if (!m->user_unit) {
|
|
r = cg_path_get_user_unit(m->cgroup, &m->user_unit);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
*ret = m->user_unit;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_session(sd_bus_message *m, const char **ret) {
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
assert_return(m->cgroup, -ESRCH);
|
|
|
|
if (!m->session) {
|
|
r = cg_path_get_session(m->cgroup, &m->session);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
*ret = m->session;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_owner_uid(sd_bus_message *m, uid_t *uid) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(uid, -EINVAL);
|
|
assert_return(m->cgroup, -ESRCH);
|
|
|
|
return cg_path_get_owner_uid(m->cgroup, uid);
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_cmdline(sd_bus_message *m, char ***cmdline) {
|
|
size_t n, i;
|
|
const char *p;
|
|
bool first;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->cmdline, -ESRCH);
|
|
|
|
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;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_audit_sessionid(sd_bus_message *m, uint32_t *sessionid) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(sessionid, -EINVAL);
|
|
assert_return(m->audit, -ESRCH);
|
|
|
|
*sessionid = m->audit->sessionid;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_audit_loginuid(sd_bus_message *m, uid_t *uid) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(uid, -EINVAL);
|
|
assert_return(m->audit, -ESRCH);
|
|
|
|
*uid = m->audit->loginuid;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_has_effective_cap(sd_bus_message *m, int capability) {
|
|
unsigned sz;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(capability < 0, -EINVAL);
|
|
assert_return(!m->capability, -ESRCH);
|
|
|
|
sz = m->capability_size / 4;
|
|
if ((unsigned) capability >= sz*8)
|
|
return 0;
|
|
|
|
return !!(m->capability[2 * sz + (capability / 8)] & (1 << (capability % 8)));
|
|
}
|
|
|
|
_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 0;
|
|
|
|
if (interface && (!m->interface || !streq(m->interface, interface)))
|
|
return 0;
|
|
|
|
if (member && (!m->member || !streq(m->member, member)))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
_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)
|
|
return 0;
|
|
|
|
if (interface && (!m->interface || !streq(m->interface, interface)))
|
|
return 0;
|
|
|
|
if (member && (!m->member || !streq(m->member, member)))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
_public_ int sd_bus_message_is_method_error(sd_bus_message *m, const char *name) {
|
|
assert_return(m, -EINVAL);
|
|
|
|
if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
|
|
return 0;
|
|
|
|
if (name && (!m->error.name || !streq(m->error.name, name)))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
_public_ int sd_bus_message_set_no_reply(sd_bus_message *m, int b) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EPERM);
|
|
|
|
if (b)
|
|
m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
|
|
else
|
|
m->header->flags &= ~SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_set_no_auto_start(sd_bus_message *m, int b) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
|
|
if (b)
|
|
m->header->flags |= SD_BUS_MESSAGE_NO_AUTO_START;
|
|
else
|
|
m->header->flags &= ~SD_BUS_MESSAGE_NO_AUTO_START;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct bus_container *message_get_container(sd_bus_message *m) {
|
|
assert(m);
|
|
|
|
if (m->n_containers == 0)
|
|
return &m->root_container;
|
|
|
|
assert(m->containers);
|
|
return m->containers + m->n_containers - 1;
|
|
}
|
|
|
|
struct bus_body_part *message_append_part(sd_bus_message *m) {
|
|
struct bus_body_part *part;
|
|
|
|
assert(m);
|
|
|
|
if (m->poisoned)
|
|
return NULL;
|
|
|
|
if (m->n_body_parts <= 0) {
|
|
part = &m->body;
|
|
zero(*part);
|
|
} else {
|
|
assert(m->body_end);
|
|
|
|
part = new0(struct bus_body_part, 1);
|
|
if (!part) {
|
|
m->poisoned = true;
|
|
return NULL;
|
|
}
|
|
|
|
m->body_end->next = part;
|
|
}
|
|
|
|
part->memfd = -1;
|
|
m->body_end = part;
|
|
m->n_body_parts ++;
|
|
|
|
return part;
|
|
}
|
|
|
|
static void part_zero(struct bus_body_part *part, size_t sz) {
|
|
assert(part);
|
|
assert(sz > 0);
|
|
assert(sz < 8);
|
|
|
|
/* All other fields can be left in their defaults */
|
|
assert(!part->data);
|
|
assert(part->memfd < 0);
|
|
|
|
part->size = sz;
|
|
part->is_zero = true;
|
|
part->sealed = true;
|
|
}
|
|
|
|
static int part_make_space(
|
|
struct sd_bus_message *m,
|
|
struct bus_body_part *part,
|
|
size_t sz,
|
|
void **q) {
|
|
|
|
void *n;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(part);
|
|
assert(!part->sealed);
|
|
|
|
if (m->poisoned)
|
|
return -ENOMEM;
|
|
|
|
if (!part->data && part->memfd < 0)
|
|
part->memfd = bus_kernel_pop_memfd(m->bus, &part->data, &part->mapped);
|
|
|
|
if (part->memfd >= 0) {
|
|
uint64_t u = sz;
|
|
|
|
r = ioctl(part->memfd, KDBUS_CMD_MEMFD_SIZE_SET, &u);
|
|
if (r < 0) {
|
|
m->poisoned = true;
|
|
return -errno;
|
|
}
|
|
|
|
if (!part->data || sz > part->mapped) {
|
|
size_t psz = PAGE_ALIGN(sz > 0 ? sz : 1);
|
|
|
|
if (part->mapped <= 0)
|
|
n = mmap(NULL, psz, PROT_READ|PROT_WRITE, MAP_SHARED, part->memfd, 0);
|
|
else
|
|
n = mremap(part->data, part->mapped, psz, MREMAP_MAYMOVE);
|
|
|
|
if (n == MAP_FAILED) {
|
|
m->poisoned = true;
|
|
return -errno;
|
|
}
|
|
|
|
part->mapped = psz;
|
|
part->data = n;
|
|
}
|
|
|
|
part->munmap_this = true;
|
|
} else {
|
|
n = realloc(part->data, MAX(sz, 1u));
|
|
if (!n) {
|
|
m->poisoned = true;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
part->data = n;
|
|
part->free_this = true;
|
|
}
|
|
|
|
if (q)
|
|
*q = part->data ? (uint8_t*) part->data + part->size : NULL;
|
|
|
|
part->size = sz;
|
|
return 0;
|
|
}
|
|
|
|
static void message_extend_containers(sd_bus_message *m, size_t expand) {
|
|
struct bus_container *c;
|
|
|
|
assert(m);
|
|
|
|
if (expand <= 0)
|
|
return;
|
|
|
|
/* Update counters */
|
|
for (c = m->containers; c < m->containers + m->n_containers; c++)
|
|
if (c->array_size)
|
|
*c->array_size += expand;
|
|
}
|
|
|
|
static void *message_extend_body(sd_bus_message *m, size_t align, size_t sz) {
|
|
struct bus_body_part *part = NULL;
|
|
size_t start_body, end_body, padding, start_part, end_part, added;
|
|
bool add_new_part;
|
|
void *p;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(align > 0);
|
|
assert(!m->sealed);
|
|
|
|
if (m->poisoned)
|
|
return NULL;
|
|
|
|
start_body = ALIGN_TO((size_t) m->header->body_size, align);
|
|
end_body = start_body + sz;
|
|
|
|
padding = start_body - m->header->body_size;
|
|
added = padding + sz;
|
|
|
|
/* Check for 32bit overflows */
|
|
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;
|
|
|
|
if (add_new_part) {
|
|
if (padding > 0) {
|
|
part = message_append_part(m);
|
|
if (!part)
|
|
return NULL;
|
|
|
|
part_zero(part, padding);
|
|
}
|
|
|
|
part = message_append_part(m);
|
|
if (!part)
|
|
return NULL;
|
|
|
|
r = part_make_space(m, part, sz, &p);
|
|
if (r < 0)
|
|
return NULL;
|
|
} else {
|
|
struct bus_container *c;
|
|
void *op;
|
|
size_t os;
|
|
|
|
part = m->body_end;
|
|
op = part->data;
|
|
os = part->size;
|
|
|
|
start_part = ALIGN_TO(part->size, align);
|
|
end_part = start_part + sz;
|
|
|
|
r = part_make_space(m, part, end_part, &p);
|
|
if (r < 0)
|
|
return NULL;
|
|
|
|
if (padding > 0) {
|
|
memset(p, 0, padding);
|
|
p = (uint8_t*) p + padding;
|
|
}
|
|
|
|
/* Readjust pointers */
|
|
for (c = m->containers; c < m->containers + m->n_containers; c++)
|
|
c->array_size = adjust_pointer(c->array_size, op, os, part->data);
|
|
|
|
m->error.message = (const char*) adjust_pointer(m->error.message, op, os, part->data);
|
|
}
|
|
|
|
m->header->body_size = end_body;
|
|
message_extend_containers(m, added);
|
|
|
|
return p;
|
|
}
|
|
|
|
int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) {
|
|
struct bus_container *c;
|
|
ssize_t align, sz;
|
|
uint32_t k;
|
|
void *a;
|
|
int fd = -1;
|
|
uint32_t fdi = 0;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(bus_type_is_basic(type), -EINVAL);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
c = message_get_container(m);
|
|
|
|
if (c->signature && c->signature[c->index]) {
|
|
/* Container signature is already set */
|
|
|
|
if (c->signature[c->index] != type)
|
|
return -ENXIO;
|
|
} else {
|
|
char *e;
|
|
|
|
/* Maybe we can append to the signature? But only if this is the top-level container*/
|
|
if (c->enclosing != 0)
|
|
return -ENXIO;
|
|
|
|
e = strextend(&c->signature, CHAR_TO_STR(type), NULL);
|
|
if (!e) {
|
|
m->poisoned = true;
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
switch (type) {
|
|
|
|
case SD_BUS_TYPE_STRING:
|
|
/* To make things easy we'll serialize a NULL string
|
|
* into the empty string */
|
|
p = strempty(p);
|
|
|
|
/* Fall through... */
|
|
case SD_BUS_TYPE_OBJECT_PATH:
|
|
|
|
if (!p) {
|
|
r = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
align = 4;
|
|
sz = 4 + strlen(p) + 1;
|
|
break;
|
|
|
|
case SD_BUS_TYPE_SIGNATURE:
|
|
|
|
if (!p) {
|
|
r = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
align = 1;
|
|
sz = 1 + strlen(p) + 1;
|
|
break;
|
|
|
|
case SD_BUS_TYPE_BOOLEAN:
|
|
|
|
if (!p) {
|
|
r = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
align = sz = 4;
|
|
|
|
assert_cc(sizeof(int) == sizeof(uint32_t));
|
|
memcpy(&k, p, 4);
|
|
k = !!k;
|
|
p = &k;
|
|
break;
|
|
|
|
case SD_BUS_TYPE_UNIX_FD: {
|
|
int z, *f;
|
|
|
|
if (!p) {
|
|
r = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
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) {
|
|
m->poisoned = true;
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
fdi = m->n_fds;
|
|
f[fdi] = fd;
|
|
m->fds = f;
|
|
m->free_fds = true;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
if (!p) {
|
|
r = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
align = bus_type_get_alignment(type);
|
|
sz = bus_type_get_size(type);
|
|
break;
|
|
}
|
|
|
|
assert(align > 0);
|
|
assert(sz > 0);
|
|
|
|
a = message_extend_body(m, align, sz);
|
|
if (!a) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
if (type == SD_BUS_TYPE_STRING || type == SD_BUS_TYPE_OBJECT_PATH) {
|
|
*(uint32_t*) a = sz - 5;
|
|
memcpy((uint8_t*) a + 4, p, sz - 4);
|
|
|
|
if (stored)
|
|
*stored = (const uint8_t*) a + 4;
|
|
|
|
} else if (type == SD_BUS_TYPE_SIGNATURE) {
|
|
*(uint8_t*) a = sz - 1;
|
|
memcpy((uint8_t*) a + 1, p, sz - 1);
|
|
|
|
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 (stored)
|
|
*stored = a;
|
|
}
|
|
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
c->index++;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
if (fd >= 0)
|
|
close_nointr_nofail(fd);
|
|
|
|
return r;
|
|
}
|
|
|
|
_public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) {
|
|
return message_append_basic(m, type, p, NULL);
|
|
}
|
|
|
|
_public_ int sd_bus_message_append_string_space(
|
|
sd_bus_message *m,
|
|
size_t size,
|
|
char **s) {
|
|
|
|
struct bus_container *c;
|
|
void *a;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(s, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
c = message_get_container(m);
|
|
|
|
if (c->signature && c->signature[c->index]) {
|
|
/* Container signature is already set */
|
|
|
|
if (c->signature[c->index] != SD_BUS_TYPE_STRING)
|
|
return -ENXIO;
|
|
} else {
|
|
char *e;
|
|
|
|
/* Maybe we can append to the signature? But only if this is the top-level container*/
|
|
if (c->enclosing != 0)
|
|
return -ENXIO;
|
|
|
|
e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL);
|
|
if (!e) {
|
|
m->poisoned = true;
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
a = message_extend_body(m, 4, 4 + size + 1);
|
|
if (!a)
|
|
return -ENOMEM;
|
|
|
|
*(uint32_t*) a = size;
|
|
*s = (char*) a + 4;
|
|
|
|
(*s)[size] = 0;
|
|
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
c->index++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_append_string_iovec(
|
|
sd_bus_message *m,
|
|
const struct iovec *iov,
|
|
unsigned n) {
|
|
|
|
size_t size;
|
|
unsigned i;
|
|
char *p;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(iov || n == 0, -EINVAL);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
size = IOVEC_TOTAL_SIZE(iov, n);
|
|
|
|
r = sd_bus_message_append_string_space(m, size, &p);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
|
|
if (iov[i].iov_base)
|
|
memcpy(p, iov[i].iov_base, iov[i].iov_len);
|
|
else
|
|
memset(p, ' ', iov[i].iov_len);
|
|
|
|
p += iov[i].iov_len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bus_message_open_array(
|
|
sd_bus_message *m,
|
|
struct bus_container *c,
|
|
const char *contents,
|
|
uint32_t **array_size) {
|
|
|
|
unsigned nindex;
|
|
void *a, *op;
|
|
int alignment;
|
|
size_t os;
|
|
struct bus_body_part *o;
|
|
|
|
assert(m);
|
|
assert(c);
|
|
assert(contents);
|
|
assert(array_size);
|
|
|
|
if (!signature_is_single(contents, true))
|
|
return -EINVAL;
|
|
|
|
alignment = bus_type_get_alignment(contents[0]);
|
|
if (alignment < 0)
|
|
return alignment;
|
|
|
|
if (c->signature && c->signature[c->index]) {
|
|
|
|
/* Verify the existing signature */
|
|
|
|
if (c->signature[c->index] != SD_BUS_TYPE_ARRAY)
|
|
return -ENXIO;
|
|
|
|
if (!startswith(c->signature + c->index + 1, contents))
|
|
return -ENXIO;
|
|
|
|
nindex = c->index + 1 + strlen(contents);
|
|
} else {
|
|
char *e;
|
|
|
|
if (c->enclosing != 0)
|
|
return -ENXIO;
|
|
|
|
/* Extend the existing signature */
|
|
|
|
e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_ARRAY), contents, NULL);
|
|
if (!e) {
|
|
m->poisoned = true;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
nindex = e - c->signature;
|
|
}
|
|
|
|
a = message_extend_body(m, 4, 4);
|
|
if (!a)
|
|
return -ENOMEM;
|
|
|
|
o = m->body_end;
|
|
op = m->body_end->data;
|
|
os = m->body_end->size;
|
|
|
|
/* Add alignment between size and first element */
|
|
if (!message_extend_body(m, alignment, 0))
|
|
return -ENOMEM;
|
|
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
c->index = nindex;
|
|
|
|
/* location of array size might have changed so let's readjust a */
|
|
if (o == m->body_end)
|
|
a = adjust_pointer(a, op, os, m->body_end->data);
|
|
|
|
*(uint32_t*) a = 0;
|
|
*array_size = a;
|
|
return 0;
|
|
}
|
|
|
|
static int bus_message_open_variant(
|
|
sd_bus_message *m,
|
|
struct bus_container *c,
|
|
const char *contents) {
|
|
|
|
size_t l;
|
|
void *a;
|
|
|
|
assert(m);
|
|
assert(c);
|
|
assert(contents);
|
|
|
|
if (!signature_is_single(contents, false))
|
|
return -EINVAL;
|
|
|
|
if (*contents == SD_BUS_TYPE_DICT_ENTRY_BEGIN)
|
|
return -EINVAL;
|
|
|
|
if (c->signature && c->signature[c->index]) {
|
|
|
|
if (c->signature[c->index] != SD_BUS_TYPE_VARIANT)
|
|
return -ENXIO;
|
|
|
|
} else {
|
|
char *e;
|
|
|
|
if (c->enclosing != 0)
|
|
return -ENXIO;
|
|
|
|
e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_VARIANT), NULL);
|
|
if (!e) {
|
|
m->poisoned = true;
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
l = strlen(contents);
|
|
a = message_extend_body(m, 1, 1 + l + 1);
|
|
if (!a)
|
|
return -ENOMEM;
|
|
|
|
*(uint8_t*) a = l;
|
|
memcpy((uint8_t*) a + 1, contents, l + 1);
|
|
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
c->index++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bus_message_open_struct(
|
|
sd_bus_message *m,
|
|
struct bus_container *c,
|
|
const char *contents) {
|
|
|
|
size_t nindex;
|
|
|
|
assert(m);
|
|
assert(c);
|
|
assert(contents);
|
|
|
|
if (!signature_is_valid(contents, false))
|
|
return -EINVAL;
|
|
|
|
if (c->signature && c->signature[c->index]) {
|
|
size_t l;
|
|
|
|
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;
|
|
|
|
nindex = c->index + 1 + l + 1;
|
|
} else {
|
|
char *e;
|
|
|
|
if (c->enclosing != 0)
|
|
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) {
|
|
m->poisoned = true;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
nindex = e - c->signature;
|
|
}
|
|
|
|
/* Align contents to 8 byte boundary */
|
|
if (!message_extend_body(m, 8, 0))
|
|
return -ENOMEM;
|
|
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
c->index = nindex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bus_message_open_dict_entry(
|
|
sd_bus_message *m,
|
|
struct bus_container *c,
|
|
const char *contents) {
|
|
|
|
size_t nindex;
|
|
|
|
assert(m);
|
|
assert(c);
|
|
assert(contents);
|
|
|
|
if (!signature_is_pair(contents))
|
|
return -EINVAL;
|
|
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
return -ENXIO;
|
|
|
|
if (c->signature && c->signature[c->index]) {
|
|
size_t l;
|
|
|
|
l = strlen(contents);
|
|
|
|
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;
|
|
|
|
nindex = c->index + 1 + l + 1;
|
|
} else
|
|
return -ENXIO;
|
|
|
|
/* Align contents to 8 byte boundary */
|
|
if (!message_extend_body(m, 8, 0))
|
|
return -ENOMEM;
|
|
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
c->index = nindex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_open_container(
|
|
sd_bus_message *m,
|
|
char type,
|
|
const char *contents) {
|
|
|
|
struct bus_container *c, *w;
|
|
uint32_t *array_size = NULL;
|
|
char *signature;
|
|
size_t before;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(contents, -EINVAL);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
/* Make sure we have space for one more container */
|
|
w = realloc(m->containers, sizeof(struct bus_container) * (m->n_containers + 1));
|
|
if (!w) {
|
|
m->poisoned = true;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
m->containers = w;
|
|
|
|
c = message_get_container(m);
|
|
|
|
signature = strdup(contents);
|
|
if (!signature) {
|
|
m->poisoned = true;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Save old index in the parent container, in case we have to
|
|
* abort this container */
|
|
c->saved_index = c->index;
|
|
before = m->header->body_size;
|
|
|
|
if (type == SD_BUS_TYPE_ARRAY)
|
|
r = bus_message_open_array(m, c, contents, &array_size);
|
|
else if (type == SD_BUS_TYPE_VARIANT)
|
|
r = bus_message_open_variant(m, c, contents);
|
|
else if (type == SD_BUS_TYPE_STRUCT)
|
|
r = bus_message_open_struct(m, c, contents);
|
|
else if (type == SD_BUS_TYPE_DICT_ENTRY)
|
|
r = bus_message_open_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->before = before;
|
|
w->begin = m->rindex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_close_container(sd_bus_message *m) {
|
|
struct bus_container *c;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(m->n_containers > 0, -EINVAL);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
c = message_get_container(m);
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
if (c->signature && c->signature[c->index] != 0)
|
|
return -EINVAL;
|
|
|
|
free(c->signature);
|
|
m->n_containers--;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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) {
|
|
|
|
unsigned n_array, n_struct;
|
|
TypeStack stack[BUS_CONTAINER_DEPTH];
|
|
unsigned stack_ptr = 0;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
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: {
|
|
uint8_t x;
|
|
|
|
x = (uint8_t) va_arg(ap, int);
|
|
r = sd_bus_message_append_basic(m, *t, &x);
|
|
break;
|
|
}
|
|
|
|
case SD_BUS_TYPE_BOOLEAN:
|
|
case SD_BUS_TYPE_INT32:
|
|
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;
|
|
}
|
|
|
|
case SD_BUS_TYPE_INT16:
|
|
case SD_BUS_TYPE_UINT16: {
|
|
uint16_t x;
|
|
|
|
x = (uint16_t) va_arg(ap, int);
|
|
r = sd_bus_message_append_basic(m, *t, &x);
|
|
break;
|
|
}
|
|
|
|
case SD_BUS_TYPE_INT64:
|
|
case SD_BUS_TYPE_UINT64:
|
|
case SD_BUS_TYPE_DOUBLE: {
|
|
uint64_t x;
|
|
|
|
x = va_arg(ap, uint64_t);
|
|
r = sd_bus_message_append_basic(m, *t, &x);
|
|
break;
|
|
}
|
|
|
|
case SD_BUS_TYPE_STRING:
|
|
case SD_BUS_TYPE_OBJECT_PATH:
|
|
case SD_BUS_TYPE_SIGNATURE: {
|
|
const char *x;
|
|
|
|
x = va_arg(ap, const char*);
|
|
r = sd_bus_message_append_basic(m, *t, x);
|
|
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_open_container(m, SD_BUS_TYPE_ARRAY, s);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
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_open_container(m, SD_BUS_TYPE_VARIANT, s);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
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_open_container(m, *t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
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:
|
|
r = -EINVAL;
|
|
}
|
|
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) {
|
|
va_list ap;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(types, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
va_start(ap, types);
|
|
r = bus_message_append_ap(m, types, ap);
|
|
va_end(ap);
|
|
|
|
return r;
|
|
}
|
|
|
|
_public_ int sd_bus_message_append_array_space(sd_bus_message *m,
|
|
char type,
|
|
size_t size,
|
|
void **ptr) {
|
|
ssize_t align, sz;
|
|
void *a;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(bus_type_is_trivial(type), -EINVAL);
|
|
assert_return(ptr || size == 0, -EINVAL);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
align = bus_type_get_alignment(type);
|
|
sz = bus_type_get_size(type);
|
|
|
|
assert_se(align > 0);
|
|
assert_se(sz > 0);
|
|
|
|
if (size % sz != 0)
|
|
return -EINVAL;
|
|
|
|
r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type));
|
|
if (r < 0)
|
|
return r;
|
|
|
|
a = message_extend_body(m, align, size);
|
|
if (!a)
|
|
return -ENOMEM;
|
|
|
|
r = sd_bus_message_close_container(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
*ptr = a;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_append_array(sd_bus_message *m,
|
|
char type,
|
|
const void *ptr,
|
|
size_t size) {
|
|
int r;
|
|
void *p;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(bus_type_is_trivial(type), -EINVAL);
|
|
assert_return(ptr || size == 0, -EINVAL);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
r = sd_bus_message_append_array_space(m, type, size, &p);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (size > 0)
|
|
memcpy(p, ptr, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_append_array_iovec(
|
|
sd_bus_message *m,
|
|
char type,
|
|
const struct iovec *iov,
|
|
unsigned n) {
|
|
|
|
size_t size;
|
|
unsigned i;
|
|
void *p;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(bus_type_is_trivial(type), -EINVAL);
|
|
assert_return(iov || n == 0, -EINVAL);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
size = IOVEC_TOTAL_SIZE(iov, n);
|
|
|
|
r = sd_bus_message_append_array_space(m, type, size, &p);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
|
|
if (iov[i].iov_base)
|
|
memcpy(p, iov[i].iov_base, iov[i].iov_len);
|
|
else
|
|
memset(p, 0, iov[i].iov_len);
|
|
|
|
p = (uint8_t*) p + iov[i].iov_len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_append_array_memfd(sd_bus_message *m,
|
|
char type,
|
|
sd_memfd *memfd) {
|
|
_cleanup_close_ int copy_fd = -1;
|
|
struct bus_body_part *part;
|
|
ssize_t align, sz;
|
|
uint64_t size;
|
|
void *a;
|
|
int r;
|
|
|
|
if (!m)
|
|
return -EINVAL;
|
|
if (!memfd)
|
|
return -EINVAL;
|
|
if (m->sealed)
|
|
return -EPERM;
|
|
if (!bus_type_is_trivial(type))
|
|
return -EINVAL;
|
|
if (m->poisoned)
|
|
return -ESTALE;
|
|
|
|
r = sd_memfd_set_sealed(memfd, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
copy_fd = sd_memfd_dup_fd(memfd);
|
|
if (copy_fd < 0)
|
|
return copy_fd;
|
|
|
|
r = sd_memfd_get_size(memfd, &size);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
align = bus_type_get_alignment(type);
|
|
sz = bus_type_get_size(type);
|
|
|
|
assert_se(align > 0);
|
|
assert_se(sz > 0);
|
|
|
|
if (size % sz != 0)
|
|
return -EINVAL;
|
|
|
|
if (size > (uint64_t) (uint32_t) -1)
|
|
return -EINVAL;
|
|
|
|
r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type));
|
|
if (r < 0)
|
|
return r;
|
|
|
|
a = message_extend_body(m, align, 0);
|
|
if (!a)
|
|
return -ENOMEM;
|
|
|
|
part = message_append_part(m);
|
|
if (!part)
|
|
return -ENOMEM;
|
|
|
|
part->memfd = copy_fd;
|
|
part->sealed = true;
|
|
part->size = size;
|
|
copy_fd = -1;
|
|
|
|
message_extend_containers(m, size);
|
|
m->header->body_size += size;
|
|
|
|
return sd_bus_message_close_container(m);
|
|
}
|
|
|
|
_public_ int sd_bus_message_append_string_memfd(sd_bus_message *m, sd_memfd *memfd) {
|
|
_cleanup_close_ int copy_fd = -1;
|
|
struct bus_body_part *part;
|
|
struct bus_container *c;
|
|
uint64_t size;
|
|
void *a;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(memfd, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
r = sd_memfd_set_sealed(memfd, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
copy_fd = sd_memfd_dup_fd(memfd);
|
|
if (copy_fd < 0)
|
|
return copy_fd;
|
|
|
|
r = sd_memfd_get_size(memfd, &size);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* We require this to be NUL terminated */
|
|
if (size == 0)
|
|
return -EINVAL;
|
|
|
|
if (size > (uint64_t) (uint32_t) -1)
|
|
return -EINVAL;
|
|
|
|
c = message_get_container(m);
|
|
if (c->signature && c->signature[c->index]) {
|
|
/* Container signature is already set */
|
|
|
|
if (c->signature[c->index] != SD_BUS_TYPE_STRING)
|
|
return -ENXIO;
|
|
} else {
|
|
char *e;
|
|
|
|
/* Maybe we can append to the signature? But only if this is the top-level container*/
|
|
if (c->enclosing != 0)
|
|
return -ENXIO;
|
|
|
|
e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL);
|
|
if (!e) {
|
|
m->poisoned = true;
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
a = message_extend_body(m, 4, 4);
|
|
if (!a)
|
|
return -ENOMEM;
|
|
|
|
*(uint32_t*) a = size - 1;
|
|
|
|
part = message_append_part(m);
|
|
if (!part)
|
|
return -ENOMEM;
|
|
|
|
part->memfd = copy_fd;
|
|
part->sealed = true;
|
|
part->size = size;
|
|
copy_fd = -1;
|
|
|
|
message_extend_containers(m, size);
|
|
m->header->body_size += size;
|
|
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
c->index++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_append_strv(sd_bus_message *m, char **l) {
|
|
char **i;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(!m->poisoned, -ESTALE);
|
|
|
|
r = sd_bus_message_open_container(m, 'a', "s");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, l) {
|
|
r = sd_bus_message_append_basic(m, 's', *i);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return sd_bus_message_close_container(m);
|
|
}
|
|
|
|
int bus_body_part_map(struct bus_body_part *part) {
|
|
void *p;
|
|
size_t psz;
|
|
|
|
assert_se(part);
|
|
|
|
if (part->data)
|
|
return 0;
|
|
|
|
if (part->size <= 0)
|
|
return 0;
|
|
|
|
/* For smaller zero parts (as used for padding) we don't need to map anything... */
|
|
if (part->memfd < 0 && part->is_zero && part->size < 8) {
|
|
static const uint8_t zeroes[7] = { };
|
|
part->data = (void*) zeroes;
|
|
return 0;
|
|
}
|
|
|
|
psz = PAGE_ALIGN(part->size);
|
|
|
|
if (part->memfd >= 0)
|
|
p = mmap(NULL, psz, PROT_READ, MAP_SHARED, part->memfd, 0);
|
|
else if (part->is_zero)
|
|
p = mmap(NULL, psz, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (p == MAP_FAILED)
|
|
return -errno;
|
|
|
|
part->mapped = psz;
|
|
part->data = p;
|
|
part->munmap_this = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void bus_body_part_unmap(struct bus_body_part *part) {
|
|
|
|
assert_se(part);
|
|
|
|
if (part->memfd < 0)
|
|
return;
|
|
|
|
if (!part->data)
|
|
return;
|
|
|
|
if (!part->munmap_this)
|
|
return;
|
|
|
|
assert_se(munmap(part->data, part->mapped) == 0);
|
|
|
|
part->data = NULL;
|
|
part->mapped = 0;
|
|
part->munmap_this = false;
|
|
|
|
return;
|
|
}
|
|
|
|
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, end;
|
|
|
|
assert(rindex);
|
|
assert(align > 0);
|
|
|
|
start = ALIGN_TO((size_t) *rindex, align);
|
|
end = start + nbytes;
|
|
|
|
if (end > sz)
|
|
return -EBADMSG;
|
|
|
|
/* 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 = end;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static bool message_end_of_signature(sd_bus_message *m) {
|
|
struct bus_container *c;
|
|
|
|
assert(m);
|
|
|
|
c = message_get_container(m);
|
|
return !c->signature || c->signature[c->index] == 0;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
_public_ int sd_bus_message_at_end(sd_bus_message *m, int complete) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
|
|
if (complete && m->n_containers > 0)
|
|
return false;
|
|
|
|
if (message_end_of_signature(m))
|
|
return true;
|
|
|
|
if (message_end_of_array(m, m->rindex))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static struct bus_body_part* find_part(sd_bus_message *m, size_t index, size_t sz, void **p) {
|
|
struct bus_body_part *part;
|
|
size_t begin;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
if (m->cached_rindex_part && index >= m->cached_rindex_part_begin) {
|
|
part = m->cached_rindex_part;
|
|
begin = m->cached_rindex_part_begin;
|
|
} else {
|
|
part = &m->body;
|
|
begin = 0;
|
|
}
|
|
|
|
while (part) {
|
|
if (index < begin)
|
|
return NULL;
|
|
|
|
if (index + sz <= begin + part->size) {
|
|
|
|
r = bus_body_part_map(part);
|
|
if (r < 0)
|
|
return NULL;
|
|
|
|
if (p)
|
|
*p = (uint8_t*) part->data + index - begin;
|
|
|
|
m->cached_rindex_part = part;
|
|
m->cached_rindex_part_begin = begin;
|
|
|
|
return part;
|
|
}
|
|
|
|
begin += part->size;
|
|
part = part->next;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int message_peek_body(
|
|
sd_bus_message *m,
|
|
size_t *rindex,
|
|
size_t align,
|
|
size_t nbytes,
|
|
void **ret) {
|
|
|
|
size_t k, start, end, padding;
|
|
struct bus_body_part *part;
|
|
uint8_t *q;
|
|
|
|
assert(m);
|
|
assert(rindex);
|
|
assert(align > 0);
|
|
|
|
if (message_end_of_array(m, *rindex))
|
|
return 0;
|
|
|
|
start = ALIGN_TO((size_t) *rindex, align);
|
|
padding = start - *rindex;
|
|
end = start + nbytes;
|
|
|
|
if (end > BUS_MESSAGE_BODY_SIZE(m))
|
|
return -EBADMSG;
|
|
|
|
part = find_part(m, *rindex, padding, (void**) &q);
|
|
if (!part)
|
|
return -EBADMSG;
|
|
|
|
if (q) {
|
|
/* Verify padding */
|
|
for (k = 0; k < padding; k++)
|
|
if (q[k] != 0)
|
|
return -EBADMSG;
|
|
}
|
|
|
|
part = find_part(m, start, nbytes, (void**) &q);
|
|
if (!part || !q)
|
|
return -EBADMSG;
|
|
|
|
*rindex = end;
|
|
|
|
if (ret)
|
|
*ret = q;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static bool validate_nul(const char *s, size_t l) {
|
|
|
|
/* 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 bool validate_string(const char *s, size_t l) {
|
|
|
|
if (!validate_nul(s, l))
|
|
return false;
|
|
|
|
/* Check if valid UTF8 */
|
|
if (!utf8_is_valid(s))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool validate_signature(const char *s, size_t l) {
|
|
|
|
if (!validate_nul(s, l))
|
|
return false;
|
|
|
|
/* Check if valid signature */
|
|
if (!signature_is_valid(s, true))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool validate_object_path(const char *s, size_t l) {
|
|
|
|
if (!validate_nul(s, l))
|
|
return false;
|
|
|
|
if (!object_path_is_valid(s))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
_public_ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p) {
|
|
struct bus_container *c;
|
|
void *q;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
assert_return(bus_type_is_basic(type), -EINVAL);
|
|
|
|
if (message_end_of_signature(m))
|
|
return -ENXIO;
|
|
|
|
if (message_end_of_array(m, m->rindex))
|
|
return 0;
|
|
|
|
c = message_get_container(m);
|
|
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;
|
|
if (p)
|
|
*(const char**) p = q;
|
|
|
|
break;
|
|
}
|
|
|
|
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;
|
|
|
|
if (p)
|
|
*(const char**) p = q;
|
|
break;
|
|
}
|
|
|
|
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);
|
|
|
|
rindex = m->rindex;
|
|
r = message_peek_body(m, &rindex, align, sz, &q);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
switch (type) {
|
|
|
|
case SD_BUS_TYPE_BYTE:
|
|
if (p)
|
|
*(uint8_t*) p = *(uint8_t*) q;
|
|
break;
|
|
|
|
case SD_BUS_TYPE_BOOLEAN:
|
|
if (p)
|
|
*(int*) p = !!*(uint32_t*) q;
|
|
break;
|
|
|
|
case SD_BUS_TYPE_INT16:
|
|
case SD_BUS_TYPE_UINT16:
|
|
if (p)
|
|
*(uint16_t*) p = BUS_MESSAGE_BSWAP16(m, *(uint16_t*) q);
|
|
break;
|
|
|
|
case SD_BUS_TYPE_INT32:
|
|
case SD_BUS_TYPE_UINT32:
|
|
if (p)
|
|
*(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:
|
|
if (p)
|
|
*(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;
|
|
|
|
if (p)
|
|
*(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;
|
|
}
|
|
|
|
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, true))
|
|
return -EINVAL;
|
|
|
|
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, false))
|
|
return -EINVAL;
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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(c);
|
|
assert(contents);
|
|
|
|
if (!signature_is_pair(contents))
|
|
return -EINVAL;
|
|
|
|
if (c->enclosing != SD_BUS_TYPE_ARRAY)
|
|
return -ENXIO;
|
|
|
|
if (!c->signature || c->signature[c->index] == 0)
|
|
return 0;
|
|
|
|
l = strlen(contents);
|
|
|
|
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;
|
|
}
|
|
|
|
_public_ 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;
|
|
size_t before;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
assert_return(type != 0 || !contents, -EINVAL);
|
|
|
|
if (type == 0 || !contents) {
|
|
const char *cc;
|
|
char tt;
|
|
|
|
/* Allow entering into anonymous containers */
|
|
r = sd_bus_message_peek_type(m, &tt, &cc);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
if (type != 0 && type != tt)
|
|
return -ENXIO;
|
|
|
|
if (contents && !streq(contents, cc))
|
|
return -ENXIO;
|
|
|
|
type = tt;
|
|
contents = cc;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
if (message_end_of_signature(m))
|
|
return -ENXIO;
|
|
|
|
if (message_end_of_array(m, m->rindex))
|
|
return 0;
|
|
|
|
c = message_get_container(m);
|
|
|
|
signature = strdup(contents);
|
|
if (!signature)
|
|
return -ENOMEM;
|
|
|
|
c->saved_index = c->index;
|
|
before = m->rindex;
|
|
|
|
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->before = before;
|
|
w->begin = m->rindex;
|
|
|
|
return 1;
|
|
}
|
|
|
|
_public_ int sd_bus_message_exit_container(sd_bus_message *m) {
|
|
struct bus_container *c;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
assert_return(m->n_containers > 0, -ENXIO);
|
|
|
|
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 -EBUSY;
|
|
}
|
|
|
|
free(c->signature);
|
|
m->n_containers--;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void message_quit_container(sd_bus_message *m) {
|
|
struct bus_container *c;
|
|
|
|
assert(m);
|
|
assert(m->sealed);
|
|
assert(m->n_containers > 0);
|
|
|
|
c = message_get_container(m);
|
|
|
|
/* Undo seeks */
|
|
assert(m->rindex >= c->before);
|
|
m->rindex = c->before;
|
|
|
|
/* Free container */
|
|
free(c->signature);
|
|
m->n_containers--;
|
|
|
|
/* Correct index of new top-level container */
|
|
c = message_get_container(m);
|
|
c->index = c->saved_index;
|
|
}
|
|
|
|
_public_ int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents) {
|
|
struct bus_container *c;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
|
|
if (message_end_of_signature(m))
|
|
goto eof;
|
|
|
|
if (message_end_of_array(m, m->rindex))
|
|
goto eof;
|
|
|
|
c = message_get_container(m);
|
|
|
|
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 = 0;
|
|
if (contents)
|
|
*contents = NULL;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_rewind(sd_bus_message *m, int complete) {
|
|
struct bus_container *c;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
|
|
if (complete) {
|
|
message_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;
|
|
unsigned n_loop = 0;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
if (isempty(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; /* lenght of current array entries */
|
|
n_struct = strlen(types); /* length of current struct contents signature */
|
|
|
|
for (;;) {
|
|
const char *t;
|
|
|
|
n_loop++;
|
|
|
|
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) {
|
|
if (n_loop <= 1)
|
|
return 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) {
|
|
if (n_loop <= 1)
|
|
return 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) {
|
|
if (n_loop <= 1)
|
|
return 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) {
|
|
if (n_loop <= 1)
|
|
return 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;
|
|
}
|
|
|
|
_public_ int sd_bus_message_read(sd_bus_message *m, const char *types, ...) {
|
|
va_list ap;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
assert_return(types, -EINVAL);
|
|
|
|
va_start(ap, types);
|
|
r = message_read_ap(m, types, ap);
|
|
va_end(ap);
|
|
|
|
return r;
|
|
}
|
|
|
|
_public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) {
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
assert_return(types, -EINVAL);
|
|
|
|
if (isempty(types))
|
|
return 0;
|
|
|
|
switch (*types) {
|
|
|
|
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:
|
|
|
|
r = sd_bus_message_read_basic(m, *types, NULL);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_skip(m, types + 1);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
|
|
case SD_BUS_TYPE_ARRAY: {
|
|
size_t k;
|
|
|
|
r = signature_element_length(types + 1, &k);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
{
|
|
char s[k+1];
|
|
memcpy(s, types+1, k);
|
|
s[k] = 0;
|
|
|
|
r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, s);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
for (;;) {
|
|
r = sd_bus_message_skip(m, s);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
break;
|
|
}
|
|
|
|
r = sd_bus_message_exit_container(m);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_bus_message_skip(m, types + 1 + k);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
case SD_BUS_TYPE_VARIANT: {
|
|
const char *contents;
|
|
char x;
|
|
|
|
r = sd_bus_message_peek_type(m, &x, &contents);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
if (x != SD_BUS_TYPE_VARIANT)
|
|
return -ENXIO;
|
|
|
|
r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_skip(m, contents);
|
|
if (r < 0)
|
|
return r;
|
|
assert(r != 0);
|
|
|
|
r = sd_bus_message_exit_container(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_skip(m, types + 1);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
case SD_BUS_TYPE_STRUCT_BEGIN:
|
|
case SD_BUS_TYPE_DICT_ENTRY_BEGIN: {
|
|
size_t k;
|
|
|
|
r = signature_element_length(types, &k);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
{
|
|
char s[k-1];
|
|
memcpy(s, types+1, k-2);
|
|
s[k-2] = 0;
|
|
|
|
r = sd_bus_message_enter_container(m, *types == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_skip(m, s);
|
|
if (r < 0)
|
|
return r;
|
|
assert(r != 0);
|
|
|
|
r = sd_bus_message_exit_container(m);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_bus_message_skip(m, types + k);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
_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;
|
|
ssize_t align;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
assert_return(bus_type_is_trivial(type), -EINVAL);
|
|
assert_return(ptr, -EINVAL);
|
|
assert_return(size, -EINVAL);
|
|
assert_return(!BUS_MESSAGE_NEED_BSWAP(m), -ENOTSUP);
|
|
|
|
align = bus_type_get_alignment(type);
|
|
if (align < 0)
|
|
return align;
|
|
|
|
r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type));
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
c = message_get_container(m);
|
|
sz = BUS_MESSAGE_BSWAP32(m, *c->array_size);
|
|
|
|
if (sz == 0)
|
|
/* Zero length array, let's return some aligned
|
|
* pointer that is not NULL */
|
|
p = (uint8_t*) NULL + align;
|
|
else {
|
|
r = message_peek_body(m, &m->rindex, align, sz, &p);
|
|
if (r < 0)
|
|
goto fail;
|
|
if (r == 0) {
|
|
r = -EBADMSG;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
r = sd_bus_message_exit_container(m);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
*ptr = (const void*) p;
|
|
*size = sz;
|
|
|
|
return 1;
|
|
|
|
fail:
|
|
message_quit_container(m);
|
|
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(BUS_MESSAGE_FIELDS(m), 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, sender_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, sender_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_SIGNAL:
|
|
if (!m->path || !m->interface || !m->member)
|
|
return -EBADMSG;
|
|
break;
|
|
|
|
case SD_BUS_MESSAGE_METHOD_CALL:
|
|
|
|
if (!m->path || !m->member)
|
|
return -EBADMSG;
|
|
|
|
break;
|
|
|
|
case SD_BUS_MESSAGE_METHOD_RETURN:
|
|
|
|
if (m->reply_serial == 0)
|
|
return -EBADMSG;
|
|
break;
|
|
|
|
case SD_BUS_MESSAGE_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_METHOD_ERROR)
|
|
sd_bus_message_read(m, "s", &m->error.message);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int bus_message_seal(sd_bus_message *m, uint64_t serial) {
|
|
struct bus_body_part *part;
|
|
size_t l, a;
|
|
unsigned i;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
if (m->sealed)
|
|
return -EPERM;
|
|
|
|
if (m->n_containers > 0)
|
|
return -EBADMSG;
|
|
|
|
if (m->poisoned)
|
|
return -ESTALE;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* 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. */
|
|
l = BUS_MESSAGE_FIELDS_SIZE(m);
|
|
a = ALIGN8(l) - l;
|
|
if (a > 0)
|
|
memset((uint8_t*) BUS_MESSAGE_FIELDS(m) + l, 0, 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 && 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)) {
|
|
bus_body_part_unmap(part);
|
|
|
|
if (ioctl(part->memfd, KDBUS_CMD_MEMFD_SEAL_SET, 1) >= 0)
|
|
part->sealed = true;
|
|
}
|
|
}
|
|
|
|
m->header->serial = serial;
|
|
m->sealed = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) {
|
|
assert_return(m, -EINVAL);
|
|
assert_return(destination, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(!m->destination, -EEXIST);
|
|
|
|
return message_append_field_string(m, SD_BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination);
|
|
}
|
|
|
|
int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) {
|
|
size_t total;
|
|
void *p, *e;
|
|
unsigned i;
|
|
struct bus_body_part *part;
|
|
|
|
assert(m);
|
|
assert(buffer);
|
|
assert(sz);
|
|
|
|
total = BUS_MESSAGE_SIZE(m);
|
|
|
|
p = malloc(total);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
e = mempcpy(p, m->header, BUS_MESSAGE_BODY_BEGIN(m));
|
|
MESSAGE_FOREACH_PART(part, i, m)
|
|
e = mempcpy(e, part->data, part->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 1;
|
|
}
|
|
|
|
_public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) {
|
|
char **strv = NULL;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
assert_return(l, -EINVAL);
|
|
|
|
r = bus_message_read_strv_extend(m, &strv);
|
|
if (r <= 0) {
|
|
strv_free(strv);
|
|
return r;
|
|
}
|
|
|
|
*l = strv;
|
|
return 1;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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 == SD_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 == 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;
|
|
}
|
|
|
|
_public_ int sd_bus_message_get_errno(sd_bus_message *m) {
|
|
assert_return(m, -EINVAL);
|
|
|
|
if (m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
|
|
return 0;
|
|
|
|
return sd_bus_error_get_errno(&m->error);
|
|
}
|
|
|
|
_public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complete) {
|
|
struct bus_container *c;
|
|
|
|
assert_return(m, NULL);
|
|
|
|
c = complete ? &m->root_container : message_get_container(m);
|
|
return c->signature ?: "";
|
|
}
|
|
|
|
_public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) {
|
|
bool done_something = false;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(source, -EINVAL);
|
|
assert_return(!m->sealed, -EPERM);
|
|
assert_return(source->sealed, -EPERM);
|
|
|
|
do {
|
|
const char *contents;
|
|
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(source, &type, &contents);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
break;
|
|
|
|
done_something = true;
|
|
|
|
if (bus_type_is_container(type) > 0) {
|
|
|
|
r = sd_bus_message_enter_container(source, type, contents);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_open_container(m, type, contents);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_copy(m, source, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_close_container(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_exit_container(source);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
continue;
|
|
}
|
|
|
|
r = sd_bus_message_read_basic(source, type, &basic);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
assert(r > 0);
|
|
|
|
if (type == SD_BUS_TYPE_OBJECT_PATH ||
|
|
type == SD_BUS_TYPE_SIGNATURE ||
|
|
type == SD_BUS_TYPE_STRING)
|
|
r = sd_bus_message_append_basic(m, type, basic.string);
|
|
else
|
|
r = sd_bus_message_append_basic(m, type, &basic);
|
|
|
|
if (r < 0)
|
|
return r;
|
|
|
|
} while (all);
|
|
|
|
return done_something;
|
|
}
|
|
|
|
_public_ int sd_bus_message_verify_type(sd_bus_message *m, char type, const char *contents) {
|
|
const char *c;
|
|
char t;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->sealed, -EPERM);
|
|
assert_return(!type || bus_type_is_valid(type), -EINVAL);
|
|
assert_return(!contents || signature_is_valid(contents, true), -EINVAL);
|
|
assert_return(type || contents, -EINVAL);
|
|
assert_return(!contents || !type || bus_type_is_container(type), -EINVAL);
|
|
|
|
r = sd_bus_message_peek_type(m, &t, &c);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
if (type != 0 && type != t)
|
|
return 0;
|
|
|
|
if (contents && !streq_ptr(contents, c))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|