* @param l4_hdr
* The pointer to the beginning of the L4 header.
* @return
- * The complemented checksum to set in the IP packet.
+ * The complemented checksum to set in the IP packet
+ * or 0 on error
*/
static inline uint16_t
rte_ipv4_udptcp_cksum(const struct ipv4_hdr *ipv4_hdr, const void *l4_hdr)
{
uint32_t cksum;
- uint32_t l4_len;
+ uint32_t l3_len, l4_len;
+
+ l3_len = rte_be_to_cpu_16(ipv4_hdr->total_length);
+ if (l3_len < sizeof(struct ipv4_hdr))
+ return 0;
- l4_len = (uint32_t)(rte_be_to_cpu_16(ipv4_hdr->total_length) -
- sizeof(struct ipv4_hdr));
+ l4_len = l3_len - sizeof(struct ipv4_hdr);
cksum = rte_raw_cksum(l4_hdr, l4_len);
cksum += rte_ipv4_phdr_cksum(ipv4_hdr, 0);