| Message ID | 20200824175108.53101-1-johannes@sipsolutions.net |
|---|---|
| State | Accepted |
| Delegated to: | David Ahern |
| Headers | show |
| Series | [1/3] libnetlink: add rtattr_for_each_nested() iteration macro | expand |
On 8/24/20 11:51 AM, Johannes Berg wrote: > This is useful for iterating elements in a nested attribute, > if they're not parsed with a strict length limit or such. > > Signed-off-by: Johannes Berg <johannes@sipsolutions.net> > --- > include/libnetlink.h | 5 +++++ > 1 file changed, 5 insertions(+) > applied to iproute2-next. Thanks, Johannes.
diff --git a/include/libnetlink.h b/include/libnetlink.h index e27516f7648f..0d4a9f29afbd 100644 --- a/include/libnetlink.h +++ b/include/libnetlink.h @@ -284,4 +284,9 @@ int rtnl_from_file(FILE *, rtnl_listen_filter_t handler, * messages from dump file */ #define NLMSG_TSTAMP 15 +#define rtattr_for_each_nested(attr, nest) \ + for ((attr) = (void *)RTA_DATA(nest); \ + RTA_OK(attr, RTA_PAYLOAD(nest) - ((char *)(attr) - (char *)RTA_DATA((nest)))); \ + (attr) = RTA_TAIL((attr))) + #endif /* __LIBNETLINK_H__ */
This is useful for iterating elements in a nested attribute, if they're not parsed with a strict length limit or such. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> --- include/libnetlink.h | 5 +++++ 1 file changed, 5 insertions(+)