diff options
Diffstat (limited to 'lib/packets.c')
| -rw-r--r-- | lib/packets.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/packets.c b/lib/packets.c index 43b5a70f3..a27264c93 100644 --- a/lib/packets.c +++ b/lib/packets.c @@ -1355,6 +1355,35 @@ compose_nd(struct dp_packet *b, const struct eth_addr eth_src, ND_MSG_LEN + ND_OPT_LEN)); } +void +compose_na(struct dp_packet *b, + const struct eth_addr eth_src, const struct eth_addr eth_dst, + const ovs_be32 ipv6_src[4], const ovs_be32 ipv6_dst[4], + ovs_be32 rco_flags) +{ + struct ovs_nd_msg *na; + struct ovs_nd_opt *nd_opt; + uint32_t icmp_csum; + + eth_compose(b, eth_dst, eth_src, ETH_TYPE_IPV6, IPV6_HEADER_LEN); + na = compose_ipv6(b, IPPROTO_ICMPV6, ipv6_src, ipv6_dst, 0, 0, 255, + ND_MSG_LEN + ND_OPT_LEN); + + na->icmph.icmp6_type = ND_NEIGHBOR_ADVERT; + na->icmph.icmp6_code = 0; + put_16aligned_be32(&na->rco_flags, rco_flags); + + nd_opt = &na->options[0]; + nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR; + nd_opt->nd_opt_len = 1; + + packet_set_nd(b, ipv6_src, eth_addr_zero, eth_src); + na->icmph.icmp6_cksum = 0; + icmp_csum = packet_csum_pseudoheader6(dp_packet_l3(b)); + na->icmph.icmp6_cksum = csum_finish(csum_continue(icmp_csum, na, + ND_MSG_LEN + ND_OPT_LEN)); +} + uint32_t packet_csum_pseudoheader(const struct ip_header *ip) { |