[libnftnl PATCH 16/17] obj: Respect data_len when setting attributes

[Phil Sutter <phil@xxxxxx>]

With attr_policy in place, data_len has an upper boundary. Use it for
memcpy() calls to cover for caller passing data with lower size than the
attribute's storage.

Signed-off-by: Phil Sutter <phil@xxxxxx>
---
 src/obj/counter.c    |  4 ++--
 src/obj/ct_expect.c  | 10 +++++-----
 src/obj/ct_helper.c  |  4 ++--
 src/obj/ct_timeout.c |  4 ++--
 src/obj/limit.c      | 10 +++++-----
 src/obj/quota.c      |  6 +++---
 src/obj/tunnel.c     | 32 ++++++++++++++++----------------
 7 files changed, 35 insertions(+), 35 deletions(-)

diff --git a/src/obj/counter.c b/src/obj/counter.c
index 44524d71b1698..19e09ed41a94a 100644
--- a/src/obj/counter.c
+++ b/src/obj/counter.c
@@ -29,10 +29,10 @@ nftnl_obj_counter_set(struct nftnl_obj *e, uint16_t type,
 
 	switch(type) {
 	case NFTNL_OBJ_CTR_BYTES:
-		memcpy(&ctr->bytes, data, sizeof(ctr->bytes));
+		memcpy(&ctr->bytes, data, data_len);
 		break;
 	case NFTNL_OBJ_CTR_PKTS:
-		memcpy(&ctr->pkts, data, sizeof(ctr->pkts));
+		memcpy(&ctr->pkts, data, data_len);
 		break;
 	}
 	return 0;
diff --git a/src/obj/ct_expect.c b/src/obj/ct_expect.c
index 978af152c5a8e..b4d6faa810eab 100644
--- a/src/obj/ct_expect.c
+++ b/src/obj/ct_expect.c
@@ -21,19 +21,19 @@ static int nftnl_obj_ct_expect_set(struct nftnl_obj *e, uint16_t type,
 
 	switch (type) {
 	case NFTNL_OBJ_CT_EXPECT_L3PROTO:
-		memcpy(&exp->l3proto, data, sizeof(exp->l3proto));
+		memcpy(&exp->l3proto, data, data_len);
 		break;
 	case NFTNL_OBJ_CT_EXPECT_L4PROTO:
-		memcpy(&exp->l4proto, data, sizeof(exp->l4proto));
+		memcpy(&exp->l4proto, data, data_len);
 		break;
 	case NFTNL_OBJ_CT_EXPECT_DPORT:
-		memcpy(&exp->dport, data, sizeof(exp->dport));
+		memcpy(&exp->dport, data, data_len);
 		break;
 	case NFTNL_OBJ_CT_EXPECT_TIMEOUT:
-		memcpy(&exp->timeout, data, sizeof(exp->timeout));
+		memcpy(&exp->timeout, data, data_len);
 		break;
 	case NFTNL_OBJ_CT_EXPECT_SIZE:
-		memcpy(&exp->size, data, sizeof(exp->size));
+		memcpy(&exp->size, data, data_len);
 		break;
 	}
 	return 0;
diff --git a/src/obj/ct_helper.c b/src/obj/ct_helper.c
index aa8e9262ec5aa..1feccf20b01b2 100644
--- a/src/obj/ct_helper.c
+++ b/src/obj/ct_helper.c
@@ -32,10 +32,10 @@ static int nftnl_obj_ct_helper_set(struct nftnl_obj *e, uint16_t type,
 		snprintf(helper->name, sizeof(helper->name), "%s", (const char *)data);
 		break;
 	case NFTNL_OBJ_CT_HELPER_L3PROTO:
-		memcpy(&helper->l3proto, data, sizeof(helper->l3proto));
+		memcpy(&helper->l3proto, data, data_len);
 		break;
 	case NFTNL_OBJ_CT_HELPER_L4PROTO:
-		memcpy(&helper->l4proto, data, sizeof(helper->l4proto));
+		memcpy(&helper->l4proto, data, data_len);
 		break;
 	}
 	return 0;
diff --git a/src/obj/ct_timeout.c b/src/obj/ct_timeout.c
index 88522d8c89bce..b9b688ec7c4bc 100644
--- a/src/obj/ct_timeout.c
+++ b/src/obj/ct_timeout.c
@@ -150,10 +150,10 @@ static int nftnl_obj_ct_timeout_set(struct nftnl_obj *e, uint16_t type,
 
 	switch (type) {
 	case NFTNL_OBJ_CT_TIMEOUT_L3PROTO:
-		memcpy(&timeout->l3proto, data, sizeof(timeout->l3proto));
+		memcpy(&timeout->l3proto, data, data_len);
 		break;
 	case NFTNL_OBJ_CT_TIMEOUT_L4PROTO:
-		memcpy(&timeout->l4proto, data, sizeof(timeout->l4proto));
+		memcpy(&timeout->l4proto, data, data_len);
 		break;
 	case NFTNL_OBJ_CT_TIMEOUT_ARRAY:
 		if (data_len < sizeof(uint32_t) * NFTNL_CTTIMEOUT_ARRAY_MAX)
diff --git a/src/obj/limit.c b/src/obj/limit.c
index 0c7362e55e682..cbf30b480b8fa 100644
--- a/src/obj/limit.c
+++ b/src/obj/limit.c
@@ -28,19 +28,19 @@ static int nftnl_obj_limit_set(struct nftnl_obj *e, uint16_t type,
 
 	switch (type) {
 	case NFTNL_OBJ_LIMIT_RATE:
-		memcpy(&limit->rate, data, sizeof(limit->rate));
+		memcpy(&limit->rate, data, data_len);
 		break;
 	case NFTNL_OBJ_LIMIT_UNIT:
-		memcpy(&limit->unit, data, sizeof(limit->unit));
+		memcpy(&limit->unit, data, data_len);
 		break;
 	case NFTNL_OBJ_LIMIT_BURST:
-		memcpy(&limit->burst, data, sizeof(limit->burst));
+		memcpy(&limit->burst, data, data_len);
 		break;
 	case NFTNL_OBJ_LIMIT_TYPE:
-		memcpy(&limit->type, data, sizeof(limit->type));
+		memcpy(&limit->type, data, data_len);
 		break;
 	case NFTNL_OBJ_LIMIT_FLAGS:
-		memcpy(&limit->flags, data, sizeof(limit->flags));
+		memcpy(&limit->flags, data, data_len);
 		break;
 	}
 	return 0;
diff --git a/src/obj/quota.c b/src/obj/quota.c
index b48ba91a4df11..526db8e42caa8 100644
--- a/src/obj/quota.c
+++ b/src/obj/quota.c
@@ -28,13 +28,13 @@ static int nftnl_obj_quota_set(struct nftnl_obj *e, uint16_t type,
 
 	switch (type) {
 	case NFTNL_OBJ_QUOTA_BYTES:
-		memcpy(&quota->bytes, data, sizeof(quota->bytes));
+		memcpy(&quota->bytes, data, data_len);
 		break;
 	case NFTNL_OBJ_QUOTA_CONSUMED:
-		memcpy(&quota->consumed, data, sizeof(quota->consumed));
+		memcpy(&quota->consumed, data, data_len);
 		break;
 	case NFTNL_OBJ_QUOTA_FLAGS:
-		memcpy(&quota->flags, data, sizeof(quota->flags));
+		memcpy(&quota->flags, data, data_len);
 		break;
 	}
 	return 0;
diff --git a/src/obj/tunnel.c b/src/obj/tunnel.c
index 07b3b2ac0cb86..03094109db442 100644
--- a/src/obj/tunnel.c
+++ b/src/obj/tunnel.c
@@ -29,52 +29,52 @@ nftnl_obj_tunnel_set(struct nftnl_obj *e, uint16_t type,
 
 	switch (type) {
 	case NFTNL_OBJ_TUNNEL_ID:
-		memcpy(&tun->id, data, sizeof(tun->id));
+		memcpy(&tun->id, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_IPV4_SRC:
-		memcpy(&tun->src_v4, data, sizeof(tun->src_v4));
+		memcpy(&tun->src_v4, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_IPV4_DST:
-		memcpy(&tun->dst_v4, data, sizeof(tun->dst_v4));
+		memcpy(&tun->dst_v4, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_IPV6_SRC:
-		memcpy(&tun->src_v6, data, sizeof(struct in6_addr));
+		memcpy(&tun->src_v6, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_IPV6_DST:
-		memcpy(&tun->dst_v6, data, sizeof(struct in6_addr));
+		memcpy(&tun->dst_v6, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_IPV6_FLOWLABEL:
-		memcpy(&tun->flowlabel, data, sizeof(tun->flowlabel));
+		memcpy(&tun->flowlabel, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_SPORT:
-		memcpy(&tun->sport, data, sizeof(tun->sport));
+		memcpy(&tun->sport, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_DPORT:
-		memcpy(&tun->dport, data, sizeof(tun->dport));
+		memcpy(&tun->dport, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_FLAGS:
-		memcpy(&tun->tun_flags, data, sizeof(tun->tun_flags));
+		memcpy(&tun->tun_flags, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_TOS:
-		memcpy(&tun->tun_tos, data, sizeof(tun->tun_tos));
+		memcpy(&tun->tun_tos, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_TTL:
-		memcpy(&tun->tun_ttl, data, sizeof(tun->tun_ttl));
+		memcpy(&tun->tun_ttl, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_VXLAN_GBP:
-		memcpy(&tun->u.tun_vxlan.gbp, data, sizeof(tun->u.tun_vxlan.gbp));
+		memcpy(&tun->u.tun_vxlan.gbp, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_ERSPAN_VERSION:
-		memcpy(&tun->u.tun_erspan.version, data, sizeof(tun->u.tun_erspan.version));
+		memcpy(&tun->u.tun_erspan.version, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_ERSPAN_V1_INDEX:
-		memcpy(&tun->u.tun_erspan.u.v1_index, data, sizeof(tun->u.tun_erspan.u.v1_index));
+		memcpy(&tun->u.tun_erspan.u.v1_index, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_ERSPAN_V2_HWID:
-		memcpy(&tun->u.tun_erspan.u.v2.hwid, data, sizeof(tun->u.tun_erspan.u.v2.hwid));
+		memcpy(&tun->u.tun_erspan.u.v2.hwid, data, data_len);
 		break;
 	case NFTNL_OBJ_TUNNEL_ERSPAN_V2_DIR:
-		memcpy(&tun->u.tun_erspan.u.v2.dir, data, sizeof(tun->u.tun_erspan.u.v2.dir));
+		memcpy(&tun->u.tun_erspan.u.v2.dir, data, data_len);
 		break;
 	}
 	return 0;
-- 
2.43.0