Hey Murad, Are you running DPDK on the receiving end as well ? In any case, I'm guessing you forgot to convert to network byte order ? :-)
2016-04-09 12:34 GMT+02:00 Murad Kablan <Murad.Kablan at colorado.edu>: > Hi, > I'm trying to change the IP and port of packets before sending them out. > The captured packet in the receiving machines seems to be corrupted as the > port is different than the one I inserted. Am I doing the checksum right? > And do I need to do other HW configurations? > > This is my code: > struct udp_hdr *udp_h; > struct ipv4_hdr *ipv4_h; > struct ether_hdr *eth_hdr; > eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); > ipv4_h = (struct ipv4_hdr *)(eth_hdr + 1); > udp_h = (struct udp_hdr *)((unsigned char *)ipv4_h + sizeof(struct > ipv4_hdr)); > > ipv4_h->dst_addr = 6777226 //(gateway-ip 10.77.0.51) > udp_h->src_port = 88 > ipv4_h->hdr_checksum = 0; > udp_h->dgram_cksum = 0; > udp_h->dgram_cksum = rte_ipv4_udptcp_cksum(ipv4_h, udp_h); > ipv4_h->hdr_checksum = rte_ipv4_cksum(ipv4_h); > l2fwd_simple_forward(m, 0); > > Thanks, > > Murad >
