static struct ofp_action_output * put_output_action(struct ofpbuf *b, uint16_t port) { struct ofp_action_output *oao; oao = ofputil_put_OFPAT_OUTPUT(b); oao->port = htons(port); return oao; }
void learn_execute(const struct nx_action_learn *learn, const struct flow *flow, struct ofputil_flow_mod *fm) { const void *p, *end; struct ofpbuf actions; cls_rule_init_catchall(&fm->cr, ntohs(learn->priority)); fm->cookie = learn->cookie; fm->table_id = learn->table_id; fm->command = OFPFC_MODIFY_STRICT; fm->idle_timeout = ntohs(learn->idle_timeout); fm->hard_timeout = ntohs(learn->hard_timeout); fm->buffer_id = UINT32_MAX; fm->out_port = OFPP_NONE; fm->flags = ntohs(learn->flags) & OFPFF_SEND_FLOW_REM; fm->actions = NULL; fm->n_actions = 0; ofpbuf_init(&actions, 64); for (p = learn + 1, end = (char *) learn + ntohs(learn->len); p != end; ) { uint16_t header = ntohs(get_be16(&p)); int n_bits = header & NX_LEARN_N_BITS_MASK; int src_type = header & NX_LEARN_SRC_MASK; int dst_type = header & NX_LEARN_DST_MASK; uint64_t value; struct nx_action_reg_load *load; ovs_be32 dst_field; int dst_ofs; if (!header) { break; } if (src_type == NX_LEARN_SRC_FIELD) { ovs_be32 src_field = get_be32(&p); int src_ofs = ntohs(get_be16(&p)); value = nxm_read_field_bits(src_field, nxm_encode_ofs_nbits(src_ofs, n_bits), flow); } else { value = get_bits(n_bits, &p); } switch (dst_type) { case NX_LEARN_DST_MATCH: dst_field = get_be32(&p); dst_ofs = ntohs(get_be16(&p)); mf_set_subfield(mf_from_nxm_header(ntohl(dst_field)), value, dst_ofs, n_bits, &fm->cr); break; case NX_LEARN_DST_LOAD: dst_field = get_be32(&p); dst_ofs = ntohs(get_be16(&p)); load = ofputil_put_NXAST_REG_LOAD(&actions); load->ofs_nbits = nxm_encode_ofs_nbits(dst_ofs, n_bits); load->dst = dst_field; load->value = htonll(value); break; case NX_LEARN_DST_OUTPUT: ofputil_put_OFPAT_OUTPUT(&actions)->port = htons(value); break; } } fm->actions = ofpbuf_steal_data(&actions); fm->n_actions = actions.size / sizeof(struct ofp_action_header); }