diff options
Diffstat (limited to 'tap.c')
| -rw-r--r-- | tap.c | 18 |
1 files changed, 14 insertions, 4 deletions
@@ -91,9 +91,10 @@ int tap_send(struct ctx *c, void *data, size_t len, int vnet_pre) * @proto: L4 protocol number * @in: Payload * @len: L4 payload length + * @flow: Flow label for TCP over IPv6 */ void tap_ip_send(struct ctx *c, struct in6_addr *src, uint8_t proto, - char *in, size_t len) + char *in, size_t len, uint32_t flow) { char buf[USHRT_MAX]; char *pkt = buf + 4; @@ -161,21 +162,30 @@ void tap_ip_send(struct ctx *c, struct in6_addr *src, uint8_t proto, struct tcphdr *th = (struct tcphdr *)(ip6h + 1); th->check = 0; - th->check = csum_ip4(ip6h, len + sizeof(*ip6h)); + th->check = csum_unaligned(ip6h, len + sizeof(*ip6h), + 0); } else if (proto == IPPROTO_UDP) { struct udphdr *uh = (struct udphdr *)(ip6h + 1); uh->check = 0; - uh->check = csum_ip4(ip6h, len + sizeof(*ip6h)); + uh->check = csum_unaligned(ip6h, len + sizeof(*ip6h), + 0); } else if (proto == IPPROTO_ICMPV6) { struct icmp6hdr *ih = (struct icmp6hdr *)(ip6h + 1); ih->icmp6_cksum = 0; - ih->icmp6_cksum = csum_ip4(ip6h, len + sizeof(*ip6h)); + ih->icmp6_cksum = csum_unaligned(ip6h, + len + sizeof(*ip6h), + 0); } ip6h->version = 6; ip6h->nexthdr = proto; ip6h->hop_limit = 255; + if (flow) { + ip6h->flow_lbl[0] = (flow >> 16) & 0xf; + ip6h->flow_lbl[1] = (flow >> 8) & 0xff; + ip6h->flow_lbl[2] = (flow >> 0) & 0xff; + } tap_send(c, buf, len + sizeof(*ip6h) + sizeof(*eh), 1); } |