-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
#include <stdbool.h>
#include <unistd.h>
-#include "util.h"
-#include "socket-util.h"
-#include "formats-util.h"
-#include "refcnt.h"
-#include "missing.h"
-
#include "sd-netlink.h"
-#include "netlink-util.h"
+
+#include "alloc-util.h"
+#include "format-util.h"
+#include "missing.h"
#include "netlink-internal.h"
#include "netlink-types.h"
+#include "netlink-util.h"
+#include "refcnt.h"
+#include "socket-util.h"
+#include "util.h"
int socket_open(int family) {
int fd;
return fd;
}
+static int broadcast_groups_get(sd_netlink *nl) {
+ _cleanup_free_ uint32_t *groups = NULL;
+ socklen_t len = 0, old_len;
+ unsigned i, j;
+ int r;
+
+ assert(nl);
+ assert(nl->fd >= 0);
+
+ r = getsockopt(nl->fd, SOL_NETLINK, NETLINK_LIST_MEMBERSHIPS, NULL, &len);
+ if (r < 0) {
+ if (errno == ENOPROTOOPT) {
+ nl->broadcast_group_dont_leave = true;
+ return 0;
+ } else
+ return -errno;
+ }
+
+ if (len == 0)
+ return 0;
+
+ groups = new0(uint32_t, len);
+ if (!groups)
+ return -ENOMEM;
+
+ old_len = len;
+
+ r = getsockopt(nl->fd, SOL_NETLINK, NETLINK_LIST_MEMBERSHIPS, groups, &len);
+ if (r < 0)
+ return -errno;
+
+ if (old_len != len)
+ return -EIO;
+
+ r = hashmap_ensure_allocated(&nl->broadcast_group_refs, NULL);
+ if (r < 0)
+ return r;
+
+ for (i = 0; i < len; i++) {
+ for (j = 0; j < sizeof(uint32_t) * 8; j++) {
+ uint32_t offset;
+ unsigned group;
+
+ offset = 1U << j;
+
+ if (!(groups[i] & offset))
+ continue;
+
+ group = i * sizeof(uint32_t) * 8 + j + 1;
+
+ r = hashmap_put(nl->broadcast_group_refs, UINT_TO_PTR(group), UINT_TO_PTR(1));
+ if (r < 0)
+ return r;
+ }
+ }
+
+ return 0;
+}
+
int socket_bind(sd_netlink *nl) {
socklen_t addrlen;
int r, one = 1;
if (r < 0)
return -errno;
+ r = broadcast_groups_get(nl);
+ if (r < 0)
+ return r;
+
return 0;
}
+static unsigned broadcast_group_get_ref(sd_netlink *nl, unsigned group) {
+ assert(nl);
+
+ return PTR_TO_UINT(hashmap_get(nl->broadcast_group_refs, UINT_TO_PTR(group)));
+}
-int socket_join_broadcast_group(sd_netlink *nl, unsigned group) {
+static int broadcast_group_set_ref(sd_netlink *nl, unsigned group, unsigned n_ref) {
+ int r;
+
+ assert(nl);
+
+ r = hashmap_replace(nl->broadcast_group_refs, UINT_TO_PTR(group), UINT_TO_PTR(n_ref));
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int broadcast_group_join(sd_netlink *nl, unsigned group) {
int r;
assert(nl);
return 0;
}
+int socket_broadcast_group_ref(sd_netlink *nl, unsigned group) {
+ unsigned n_ref;
+ int r;
+
+ assert(nl);
+
+ n_ref = broadcast_group_get_ref(nl, group);
+
+ n_ref++;
+
+ r = hashmap_ensure_allocated(&nl->broadcast_group_refs, NULL);
+ if (r < 0)
+ return r;
+
+ r = broadcast_group_set_ref(nl, group, n_ref);
+ if (r < 0)
+ return r;
+
+ if (n_ref > 1)
+ /* not yet in the group */
+ return 0;
+
+ r = broadcast_group_join(nl, group);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int broadcast_group_leave(sd_netlink *nl, unsigned group) {
+ int r;
+
+ assert(nl);
+ assert(nl->fd >= 0);
+ assert(group > 0);
+
+ if (nl->broadcast_group_dont_leave)
+ return 0;
+
+ r = setsockopt(nl->fd, SOL_NETLINK, NETLINK_DROP_MEMBERSHIP, &group, sizeof(group));
+ if (r < 0)
+ return -errno;
+
+ return 0;
+}
+
+int socket_broadcast_group_unref(sd_netlink *nl, unsigned group) {
+ unsigned n_ref;
+ int r;
+
+ assert(nl);
+
+ n_ref = broadcast_group_get_ref(nl, group);
+
+ assert(n_ref > 0);
+
+ n_ref--;
+
+ r = broadcast_group_set_ref(nl, group, n_ref);
+ if (r < 0)
+ return r;
+
+ if (n_ref > 0)
+ /* still refs left */
+ return 0;
+
+ r = broadcast_group_leave(nl, group);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
/* returns the number of bytes sent, or a negative error code */
int socket_write_message(sd_netlink *nl, sd_netlink_message *m) {
union {
else if (errno == EAGAIN)
log_debug("rtnl: no data in socket");
- return (errno == EAGAIN || errno == EINTR) ? 0 : -errno;
+ return IN_SET(errno, EAGAIN, EINTR) ? 0 : -errno;
}
if (sender.nl.nl_pid != 0) {
/* drop the message */
r = recvmsg(fd, &msg, 0);
if (r < 0)
- return (errno == EAGAIN || errno == EINTR) ? 0 : -errno;
+ return IN_SET(errno, EAGAIN, EINTR) ? 0 : -errno;
}
return 0;
* On failure, a negative error code is returned.
*/
int socket_read_message(sd_netlink *rtnl) {
- _cleanup_netlink_message_unref_ sd_netlink_message *first = NULL;
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *first = NULL;
struct iovec iov = {};
uint32_t group = 0;
bool multi_part = false, done = false;
}
for (new_msg = rtnl->rbuffer; NLMSG_OK(new_msg, len) && !done; new_msg = NLMSG_NEXT(new_msg, len)) {
- _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL;
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
const NLType *nl_type;
if (!group && new_msg->nlmsg_pid != rtnl->sockaddr.nl.nl_pid)
if (r < 0)
return r;
- rtnl->rqueue[rtnl->rqueue_size ++] = first;
+ rtnl->rqueue[rtnl->rqueue_size++] = first;
first = NULL;
if (multi_part && (i < rtnl->rqueue_partial_size)) {
/* remove the message form the partial read queue */
memmove(rtnl->rqueue_partial + i,rtnl->rqueue_partial + i + 1,
sizeof(sd_netlink_message*) * (rtnl->rqueue_partial_size - i - 1));
- rtnl->rqueue_partial_size --;
+ rtnl->rqueue_partial_size--;
}
return 1;
if (r < 0)
return r;
- rtnl->rqueue_partial[rtnl->rqueue_partial_size ++] = first;
+ rtnl->rqueue_partial[rtnl->rqueue_partial_size++] = first;
}
first = NULL;
projects / thirdparty / systemd.git / blobdiff