diff options
| -rw-r--r-- | sys/netinet/tcp_lro.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/sys/netinet/tcp_lro.c b/sys/netinet/tcp_lro.c index 4f0a30e..18258a9 100644 --- a/sys/netinet/tcp_lro.c +++ b/sys/netinet/tcp_lro.c @@ -184,7 +184,7 @@ tcp_lro_rx(struct lro_ctrl *cntl, struct mbuf *m_head, uint32_t csum) struct mbuf *m_nxt, *m_tail; struct lro_entry *lro; int hlen, ip_len, tcp_hdr_len, tcp_data_len, tot_len; - int opt_bytes, trim; + int opt_bytes, trim, csum_flags; uint32_t seq, tmp_csum, device_mtu; @@ -204,12 +204,20 @@ tcp_lro_rx(struct lro_ctrl *cntl, struct mbuf *m_head, uint32_t csum) return -1; /* verify that the IP header checksum is correct */ - tmp_csum = do_csum_data((uint16_t *)ip, sizeof (*ip)); - if (__predict_false((tmp_csum ^ 0xffff) != 0)) { - cntl->lro_bad_csum++; - return -1; + csum_flags = m_head->m_pkthdr.csum_flags; + if (csum_flags & CSUM_IP_CHECKED) { + if (__predict_false((csum_flags & CSUM_IP_VALID) == 0)) { + cntl->lro_bad_csum++; + return -1; + } + } else { + tmp_csum = do_csum_data((uint16_t *)ip, sizeof (*ip)); + if (__predict_false((tmp_csum ^ 0xffff) != 0)) { + cntl->lro_bad_csum++; + return -1; + } } - + /* find the TCP header */ tcp = (struct tcphdr *) (ip + 1); |
