#include "sd-rtnl.h"
#include "rtnl-internal.h"
+#include "rtnl-util.h"
static int sd_rtnl_new(sd_rtnl **ret) {
sd_rtnl *rtnl;
rtnl->sockaddr.nl.nl_family = AF_NETLINK;
+ rtnl->original_pid = getpid();
+
*ret = rtnl;
return 0;
}
+static bool rtnl_pid_changed(sd_rtnl *rtnl) {
+ assert(rtnl);
+
+ /* We don't support people creating an rtnl connection and
+ * keeping it around over a fork(). Let's complain. */
+
+ return rtnl->original_pid != getpid();
+}
+
int sd_rtnl_open(uint32_t groups, sd_rtnl **ret) {
_cleanup_sd_rtnl_unref_ sd_rtnl *rtnl = NULL;
+ socklen_t addrlen;
int r;
r = sd_rtnl_new(&rtnl);
rtnl->sockaddr.nl.nl_groups = groups;
- r = bind(rtnl->fd, &rtnl->sockaddr.sa, sizeof(rtnl->sockaddr));
+ addrlen = sizeof(rtnl->sockaddr);
+
+ r = bind(rtnl->fd, &rtnl->sockaddr.sa, addrlen);
if (r < 0)
return -errno;
+ r = getsockname(rtnl->fd, &rtnl->sockaddr.sa, &addrlen);
+ if (r < 0)
+ return r;
+
*ret = rtnl;
rtnl = NULL;
int r, serial;
assert_return(nl, -EINVAL);
+ assert_return(!rtnl_pid_changed(nl), -ECHILD);
assert_return(message, -EINVAL);
r = message_seal(nl, message);