diff options
Diffstat (limited to 'src/vnet/ip/ip4_input.h')
| -rw-r--r-- | src/vnet/ip/ip4_input.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/vnet/ip/ip4_input.h b/src/vnet/ip/ip4_input.h index 57aef0bf77a..d2ed13fa35f 100644 --- a/src/vnet/ip/ip4_input.h +++ b/src/vnet/ip/ip4_input.h @@ -60,15 +60,17 @@ check_ver_opt_csum (ip4_header_t * ip, u8 * error, int verify_checksum) { if (PREDICT_FALSE (ip->ip_version_and_header_length != 0x45)) { - if ((ip->ip_version_and_header_length & 0xf) != 5) + if ((ip->ip_version_and_header_length & 0xf0) != 0x40) + *error = IP4_ERROR_VERSION; + else if ((ip->ip_version_and_header_length & 0x0f) < 5) + *error = IP4_ERROR_HDR_TOO_SHORT; + else { *error = IP4_ERROR_OPTIONS; if (verify_checksum && clib_ip_csum ((u8 *) ip, ip4_header_bytes (ip)) != 0) *error = IP4_ERROR_BAD_CHECKSUM; } - else - *error = IP4_ERROR_VERSION; } else if (PREDICT_FALSE (verify_checksum && clib_ip_csum ((u8 *) ip, sizeof (ip4_header_t)) != |