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[zebra:linux] netlink: no need to change privs for receive

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2008-06-17 Stephen Hemminger <stephen.hemminger@vyatta.com>

	* rt_netlink.c: (netlink_parse_info) Linux doesn't check privledges
	  on receive, so avoid the overhead of lowering and raising the
	  priviledges on each received message

Signed-off-by: Paul Jakma <paul@quagga.net>
This commit is contained in:
Stephen Hemminger 2008-08-17 17:01:44 +01:00 committed by Paul Jakma
parent 898987e976
commit 4c699477d2
1 changed files with 3 additions and 12 deletions
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15
zebra/rt_netlink.c
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@ -285,25 +285,16 @@ netlink_parse_info (int (*filter) (struct sockaddr_nl *, struct nlmsghdr *),
struct sockaddr_nl snl;
struct msghdr msg = { (void *) &snl, sizeof snl, &iov, 1, NULL, 0, 0 };
struct nlmsghdr *h;
int save_errno;
if (zserv_privs.change (ZPRIVS_RAISE))
zlog (NULL, LOG_ERR, "Can't raise privileges");
status = recvmsg (nl->sock, &msg, 0);
save_errno = errno;
if (zserv_privs.change (ZPRIVS_LOWER))
zlog (NULL, LOG_ERR, "Can't lower privileges");
if (status < 0)
{
if (save_errno == EINTR)
if (errno == EINTR)
continue;
if (save_errno == EWOULDBLOCK || save_errno == EAGAIN)
if (errno == EWOULDBLOCK || errno == EAGAIN)
break;
zlog (NULL, LOG_ERR, "%s recvmsg overrun: %s",
nl->name, safe_strerror(save_errno));
nl->name, safe_strerror(errno));
continue;
}