/* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or
* fields. */
bool
flow_wildcards_is_catchall(const struct flow_wildcards *wc)
{
int i;
BUILD_ASSERT_DECL(FLOW_WC_SEQ == 14);
if (wc->wildcards != FWW_ALL
|| wc->tun_id_mask != htonll(0)
|| wc->nw_src_mask != htonl(0)
|| wc->nw_dst_mask != htonl(0)
|| wc->tp_src_mask != htons(0)
|| wc->tp_dst_mask != htons(0)
|| wc->vlan_tci_mask != htons(0)
|| wc->metadata_mask != htonll(0)
|| !eth_addr_is_zero(wc->dl_src_mask)
|| !eth_addr_is_zero(wc->dl_dst_mask)
|| !eth_addr_is_zero(wc->arp_sha_mask)
|| !eth_addr_is_zero(wc->arp_tha_mask)
|| !ipv6_mask_is_any(&wc->ipv6_src_mask)
|| !ipv6_mask_is_any(&wc->ipv6_dst_mask)
|| wc->ipv6_label_mask != htonl(0)
|| !ipv6_mask_is_any(&wc->nd_target_mask)
|| wc->nw_frag_mask != 0) {
return false;
}
for (i = 0; i < FLOW_N_REGS; i++) {
if (wc->reg_masks[i] != 0) {
return false;
}
}
return true;
}
void
flow_format(struct ds *ds, const struct flow *flow)
{
ds_put_format(ds, "priority:%"PRIu32
",tunnel:%#"PRIx64
",metadata:%#"PRIx64
",in_port:%04"PRIx16,
flow->skb_priority,
ntohll(flow->tun_id),
ntohll(flow->metadata),
flow->in_port);
ds_put_format(ds, ",tci(");
if (flow->vlan_tci) {
ds_put_format(ds, "vlan:%"PRIu16",pcp:%d",
vlan_tci_to_vid(flow->vlan_tci),
vlan_tci_to_pcp(flow->vlan_tci));
} else {
ds_put_char(ds, '0');
}
ds_put_format(ds, ") mac("ETH_ADDR_FMT"->"ETH_ADDR_FMT
") type:%04"PRIx16,
ETH_ADDR_ARGS(flow->dl_src),
ETH_ADDR_ARGS(flow->dl_dst),
ntohs(flow->dl_type));
if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
ds_put_format(ds, " label:%#"PRIx32" proto:%"PRIu8" tos:%#"PRIx8
" ttl:%"PRIu8" ipv6(",
ntohl(flow->ipv6_label), flow->nw_proto,
flow->nw_tos, flow->nw_ttl);
print_ipv6_addr(ds, &flow->ipv6_src);
ds_put_cstr(ds, "->");
print_ipv6_addr(ds, &flow->ipv6_dst);
ds_put_char(ds, ')');
} else {
ds_put_format(ds, " proto:%"PRIu8" tos:%#"PRIx8" ttl:%"PRIu8
" ip("IP_FMT"->"IP_FMT")",
flow->nw_proto, flow->nw_tos, flow->nw_ttl,
IP_ARGS(&flow->nw_src), IP_ARGS(&flow->nw_dst));
}
if (flow->nw_frag) {
ds_put_format(ds, " frag(%s)",
flow->nw_frag == FLOW_NW_FRAG_ANY ? "first"
: flow->nw_frag == (FLOW_NW_FRAG_ANY | FLOW_NW_FRAG_LATER)
? "later" : "<error>");
}
if (flow->tp_src || flow->tp_dst) {
ds_put_format(ds, " port(%"PRIu16"->%"PRIu16")",
ntohs(flow->tp_src), ntohs(flow->tp_dst));
}
if (!eth_addr_is_zero(flow->arp_sha) || !eth_addr_is_zero(flow->arp_tha)) {
ds_put_format(ds, " arp_ha("ETH_ADDR_FMT"->"ETH_ADDR_FMT")",
ETH_ADDR_ARGS(flow->arp_sha),
ETH_ADDR_ARGS(flow->arp_tha));
}
}
static void
format_eth_masked(struct ds *s, const char *name, const uint8_t eth[6],
const uint8_t mask[6])
{
if (!eth_addr_is_zero(mask)) {
ds_put_format(s, "%s=", name);
eth_format_masked(eth, mask, s);
ds_put_char(s, ',');
}
}
static void
nxm_put_eth_masked(struct ofpbuf *b, uint32_t header,
const uint8_t value[ETH_ADDR_LEN],
const uint8_t mask[ETH_ADDR_LEN])
{
if (!eth_addr_is_zero(mask)) {
if (eth_mask_is_exact(mask)) {
nxm_put_eth(b, header, value);
} else {
nxm_put_header(b, NXM_MAKE_WILD_HEADER(header));
ofpbuf_put(b, value, ETH_ADDR_LEN);
ofpbuf_put(b, mask, ETH_ADDR_LEN);
}
}
}
static bool
parse_icmpv6(struct ofpbuf *b, struct flow *flow)
{
const struct icmp6_hdr *icmp = pull_icmpv6(b);
if (!icmp) {
return false;
}
/* The ICMPv6 type and code fields use the 16-bit transport port
* fields, so we need to store them in 16-bit network byte order. */
flow->tp_src = htons(icmp->icmp6_type);
flow->tp_dst = htons(icmp->icmp6_code);
if (icmp->icmp6_code == 0 &&
(icmp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) {
const struct in6_addr *nd_target;
nd_target = ofpbuf_try_pull(b, sizeof *nd_target);
if (!nd_target) {
return false;
}
flow->nd_target = *nd_target;
while (b->size >= 8) {
/* The minimum size of an option is 8 bytes, which also is
* the size of Ethernet link-layer options. */
const struct nd_opt_hdr *nd_opt = b->data;
int opt_len = nd_opt->nd_opt_len * 8;
if (!opt_len || opt_len > b->size) {
goto invalid;
}
/* Store the link layer address if the appropriate option is
* provided. It is considered an error if the same link
* layer option is specified twice. */
if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LINKADDR
&& opt_len == 8) {
if (eth_addr_is_zero(flow->arp_sha)) {
memcpy(flow->arp_sha, nd_opt + 1, ETH_ADDR_LEN);
} else {
goto invalid;
}
} else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LINKADDR
&& opt_len == 8) {
if (eth_addr_is_zero(flow->arp_tha)) {
memcpy(flow->arp_tha, nd_opt + 1, ETH_ADDR_LEN);
} else {
goto invalid;
}
}
if (!ofpbuf_try_pull(b, opt_len)) {
goto invalid;
}
}
}
return true;
invalid:
memset(&flow->nd_target, 0, sizeof(flow->nd_target));
memset(flow->arp_sha, 0, sizeof(flow->arp_sha));
memset(flow->arp_tha, 0, sizeof(flow->arp_tha));
return false;
}
