* [dpdk-dev] udp checksum
@ 2019-09-24 15:11 Khoussi, Siham (IntlAssoc)
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From: Khoussi, Siham (IntlAssoc) @ 2019-09-24 15:11 UTC (permalink / raw)
To: dev
Dear all,
I have a question related to layer 4 checksum. I am creating a UDP packet by appending the layers in order (udp, ipv4, Eth). However, when I run Wireshark on the receiving end I get: [UDPchecksum = missing (nor present]. Whereas, the checksum for ipv4 works fine.
Here is what I do:
.... Filling udp header
.....
Struct udp_hdr *udp=(struct udp_hdr*)rte_pktmbuf_prepend(mbuf, sizeof(*udp));
Udp->dgram_cksum=0;
Ipv4->hdr->hdr_cksum=0;
Udp->dgram_cksum= rte_ipv4_udptcp_cksum((const struct ipv4_hdr *)ipv4_hdr, (const void *)udp);
Ipv4_hdr->hdr_cksum= rte_ipv4_cksum((const struct ipv4_hdr *)ipv4_hdr);
--- continue filling ipv4 fields
...
Does anyone have an idea why rte_ipv4_udptcp_cksum() not working?
Thank you,
Siham
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