diff options
Diffstat (limited to 'lib/libtle_l4p/misc.h')
| -rw-r--r-- | lib/libtle_l4p/misc.h | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/lib/libtle_l4p/misc.h b/lib/libtle_l4p/misc.h index 9bff459..8be5dfe 100644 --- a/lib/libtle_l4p/misc.h +++ b/lib/libtle_l4p/misc.h @@ -286,6 +286,9 @@ _ipv4x_cksum(const void *iph, size_t len) return (cksum == 0xffff) ? cksum : ~cksum; } +/* + * helper function to check csum. + */ static inline int check_pkt_csum(const struct rte_mbuf *m, uint64_t ol_flags, uint32_t type, uint32_t proto) @@ -293,19 +296,33 @@ check_pkt_csum(const struct rte_mbuf *m, uint64_t ol_flags, uint32_t type, const struct ipv4_hdr *l3h4; const struct ipv6_hdr *l3h6; const struct udp_hdr *l4h; - int32_t ret; + uint64_t fl3, fl4; uint16_t csum; + int32_t ret; - ret = 0; + fl4 = ol_flags & PKT_RX_L4_CKSUM_MASK; + fl3 = (type == TLE_V4) ? + (ol_flags & PKT_RX_IP_CKSUM_MASK) : PKT_RX_IP_CKSUM_GOOD; + + /* case 0: both ip and l4 cksum is verified or data is valid */ + if ((fl3 | fl4) == (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD)) + return 0; + + /* case 1: either ip or l4 cksum bad */ + if (fl3 == PKT_RX_IP_CKSUM_BAD || fl4 == PKT_RX_L4_CKSUM_BAD) + return 1; + + /* case 2: either ip or l4 or both cksum is unknown */ l3h4 = rte_pktmbuf_mtod_offset(m, const struct ipv4_hdr *, m->l2_len); l3h6 = rte_pktmbuf_mtod_offset(m, const struct ipv6_hdr *, m->l2_len); - if ((ol_flags & PKT_RX_IP_CKSUM_BAD) != 0) { + ret = 0; + if (fl3 == PKT_RX_IP_CKSUM_UNKNOWN && l3h4->hdr_checksum != 0) { csum = _ipv4x_cksum(l3h4, m->l3_len); ret = (csum != UINT16_MAX); } - if (ret == 0 && (ol_flags & PKT_RX_L4_CKSUM_BAD) != 0) { + if (ret == 0 && fl4 == PKT_RX_L4_CKSUM_UNKNOWN) { /* * for IPv4 it is allowed to have zero UDP cksum, |