src: Fix nftnl_*_get_data() to return the real attribute length

All getters must set the memory size of the attributes, ie. this
includes the nul-termination in strings.

For references to opaque objects hidden behind the curtain, report
a zero size.

Signed-off-by: Carlos Falgueras García <carlosfg@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/set.c b/src/set.c
index e48ff78..8a592db 100644
--- a/src/set.c
+++ b/src/set.c
@@ -215,8 +215,10 @@ const void *nftnl_set_get_data(const struct nftnl_set *s, uint16_t attr,
 
 	switch(attr) {
 	case NFTNL_SET_TABLE:
+		*data_len = strlen(s->table) + 1;
 		return s->table;
 	case NFTNL_SET_NAME:
+		*data_len = strlen(s->name) + 1;
 		return s->name;
 	case NFTNL_SET_FLAGS:
 		*data_len = sizeof(uint32_t);