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Implement set-field for IPv6 ND fields (nd_target, nd_sll, and nd_tll).

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This patch adds set-field operations for nd_target, nd_sll, and nd_tll
fields, with and without masks, using Nicira extensions and OpenFlow 1.2
protocol.

Signed-off-by: Randall A Sharo <randall.sharo at navy.mil>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Sharo, Randall A CIV SPAWARSYSCEN-ATLANTIC, 55200
2014-12-23 23:42:05 +00:00
committed by Ben Pfaff
parent ed5c51108c
commit e60e935b1f
14 changed files with 293 additions and 11 deletions
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52
lib/packets.c
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@@ -875,6 +875,58 @@ packet_set_sctp_port(struct ofpbuf *packet, ovs_be16 src, ovs_be16 dst)
put_16aligned_be32(&sh->sctp_csum, old_csum ^ old_correct_csum ^ new_csum);
}
void
packet_set_nd(struct ofpbuf *packet, const ovs_be32 target[4],
const uint8_t sll[ETH_ADDR_LEN],
const uint8_t tll[ETH_ADDR_LEN]) {
struct ovs_nd_msg *ns;
struct ovs_nd_opt *nd_opt;
int bytes_remain = ofpbuf_l4_size(packet);
if (OVS_UNLIKELY(bytes_remain < sizeof(*ns))) {
return;
}
ns = ofpbuf_l4(packet);
nd_opt = &ns->options[0];
bytes_remain -= sizeof(*ns);
if (memcmp(&ns->target, target, sizeof(ovs_be32[4]))) {
packet_set_ipv6_addr(packet, IPPROTO_ICMPV6,
ns->target.be32,
target, true);
}
while (bytes_remain >= ND_OPT_LEN && nd_opt->nd_opt_len != 0) {
if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LINKADDR
&& nd_opt->nd_opt_len == 1) {
if (memcmp(nd_opt->nd_opt_data, sll, ETH_ADDR_LEN)) {
ovs_be16 *csum = &(ns->icmph.icmp6_cksum);
*csum = recalc_csum48(*csum, nd_opt->nd_opt_data, sll);
memcpy(nd_opt->nd_opt_data, sll, ETH_ADDR_LEN);
}
/* A packet can only contain one SLL or TLL option */
break;
} else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LINKADDR
&& nd_opt->nd_opt_len == 1) {
if (memcmp(nd_opt->nd_opt_data, tll, ETH_ADDR_LEN)) {
ovs_be16 *csum = &(ns->icmph.icmp6_cksum);
*csum = recalc_csum48(*csum, nd_opt->nd_opt_data, tll);
memcpy(nd_opt->nd_opt_data, tll, ETH_ADDR_LEN);
}
/* A packet can only contain one SLL or TLL option */
break;
}
nd_opt += nd_opt->nd_opt_len;
bytes_remain -= nd_opt->nd_opt_len * ND_OPT_LEN;
}
}
const char *
packet_tcp_flag_to_string(uint32_t flag)
{