-static bool
-is_ip(const struct ofpbuf *packet, const struct flow *key)
-{
- return key->dl_type == htons(ETH_TYPE_IP) && packet->l4;
-}
-
-static void
-dp_netdev_set_nw_addr(struct ofpbuf *packet, const struct flow *key,
- const struct nlattr *a)
-{
- if (is_ip(packet, key)) {
- struct ip_header *nh = packet->l3;
- ovs_be32 ip = nl_attr_get_be32(a);
- uint16_t type = nl_attr_type(a);
- ovs_be32 *field;
-
- field = type == OVS_ACTION_ATTR_SET_NW_SRC ? &nh->ip_src : &nh->ip_dst;
- if (key->nw_proto == IPPROTO_TCP && packet->l7) {
- struct tcp_header *th = packet->l4;
- th->tcp_csum = recalc_csum32(th->tcp_csum, *field, ip);
- } else if (key->nw_proto == IPPROTO_UDP && packet->l7) {
- struct udp_header *uh = packet->l4;
- if (uh->udp_csum) {
- uh->udp_csum = recalc_csum32(uh->udp_csum, *field, ip);
- if (!uh->udp_csum) {
- uh->udp_csum = htons(0xffff);
- }
- }
- }
- nh->ip_csum = recalc_csum32(nh->ip_csum, *field, ip);
- *field = ip;
- }
-}
-
-static void
-dp_netdev_set_nw_tos(struct ofpbuf *packet, const struct flow *key,
- uint8_t nw_tos)
-{
- if (is_ip(packet, key)) {
- struct ip_header *nh = packet->l3;
- uint8_t *field = &nh->ip_tos;
-
- /* Set the DSCP bits and preserve the ECN bits. */
- uint8_t new = nw_tos | (nh->ip_tos & IP_ECN_MASK);
-
- nh->ip_csum = recalc_csum16(nh->ip_csum, htons((uint16_t)*field),
- htons((uint16_t) new));
- *field = new;
- }
-}
-
-static void
-dp_netdev_set_tp_port(struct ofpbuf *packet, const struct flow *key,
- const struct nlattr *a)
-{
- if (is_ip(packet, key)) {
- uint16_t type = nl_attr_type(a);
- ovs_be16 port = nl_attr_get_be16(a);
- ovs_be16 *field;
-
- if (key->nw_proto == IPPROTO_TCP && packet->l7) {
- struct tcp_header *th = packet->l4;
- field = (type == OVS_ACTION_ATTR_SET_TP_SRC
- ? &th->tcp_src : &th->tcp_dst);
- th->tcp_csum = recalc_csum16(th->tcp_csum, *field, port);
- *field = port;
- } else if (key->nw_proto == IPPROTO_UDP && packet->l7) {
- struct udp_header *uh = packet->l4;
- field = (type == OVS_ACTION_ATTR_SET_TP_SRC
- ? &uh->udp_src : &uh->udp_dst);
- uh->udp_csum = recalc_csum16(uh->udp_csum, *field, port);
- *field = port;
- } else {
- return;
- }
- }