Commit b97d38e5 authored by Beniamino Galvani's avatar Beniamino Galvani

lldp: fix parsing of vlan-name attribute

We used to read 3 bytes after the TLV, fix this.

Also, check that string length is at most 32 bytes as specified in
figure E.3 of IEEE 802.1AB-2009.

Fixes: 18133ea1

https://bugzilla.redhat.com/show_bug.cgi?id=1652210
(cherry picked from commit e9097787)
(cherry picked from commit 05c27c3c)
(cherry picked from commit 6d4ad477)
parent ab42b965
......@@ -532,11 +532,13 @@ lldp_neighbor_new (sd_lldp_neighbor *neighbor_sd, GError **error)
l = data8[2];
if (len != 3 + l)
continue;
if (l > 32)
continue;
_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_VID,
_access_uint16 (&data8[0]));
_lldp_attr_set_str_ptr (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_VLAN_NAME,
&data8[3], len);
&data8[3], l);
break;
}
default:
......
......@@ -220,11 +220,10 @@ TEST_RECV_FRAME_DEFINE (_test_recv_data1_frame0,
0x01, 0xe8,
0xfe, 0x07, 0x00, 0x80, 0xc2, 0x02, /* IEEE 802.1 - Port and Protocol VLAN ID */
0x01, 0x00, 0x00,
0xfe, 0x17, 0x00, 0x80, 0xc2, 0x03, /* IEEE 802.1 - VLAN Name */
0x01, 0xe8, 0x10, 0x76, 0x32, 0x2d,
0xfe, 0x16, 0x00, 0x80, 0xc2, 0x03, /* IEEE 802.1 - VLAN Name */
0x01, 0xe8, 0x0f, 0x76, 0x32, 0x2d,
0x30, 0x34, 0x38, 0x38, 0x2d, 0x30,
0x33, 0x2d, 0x30, 0x35, 0x30, 0x35,
0x00,
0xfe, 0x05, 0x00, 0x80, 0xc2, 0x04, /* IEEE 802.1 - Protocol Identity */
0x00,
0x00, 0x00 /* End of LLDPDU */
......
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