NETIF_F_V4_CSUM 542 include/linux/netdevice.h #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) NETIF_F_V4_CSUM 1196 net/ipv4/af_inet.c if (!(features & NETIF_F_V4_CSUM)) NETIF_F_V4_CSUM 852 net/ipv4/ip_output.c rt->u.dst.dev->features & NETIF_F_V4_CSUM && NETIF_F_V4_CSUM 168 net/ipv4/netfilter/nf_nat_helper.c skb->dev->features & NETIF_F_V4_CSUM) { NETIF_F_V4_CSUM 257 net/ipv4/netfilter/nf_nat_helper.c skb->dev->features & NETIF_F_V4_CSUM) {