ofp-actions: Prefer OFPAT11_DEC_TTL to NXAST_DEC_TTL for OpenFlow 1.1+.
[openvswitch] / lib / ofp-actions.c
index 210f4ce6eead263dace32a8255eb9e64e5a02919..ae20f8e3b260d8d1fed8d5733aa6193d74fc8f39 100644 (file)
@@ -149,14 +149,14 @@ note_from_openflow(const struct nx_action_note *nan, struct ofpbuf *out)
 }
 
 static enum ofperr
-dec_ttl_from_openflow(struct ofpbuf *out)
+dec_ttl_from_openflow(struct ofpbuf *out, enum ofputil_action_code compat)
 {
     uint16_t id = 0;
     struct ofpact_cnt_ids *ids;
     enum ofperr error = 0;
 
     ids = ofpact_put_DEC_TTL(out);
-    ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL;
+    ids->ofpact.compat = compat;
     ids->n_controllers = 1;
     ofpbuf_put(out, &id, sizeof id);
     ids = out->l2;
@@ -282,8 +282,7 @@ ofpact_from_nxast(const union ofp_action *a, enum ofputil_action_code code,
     switch (code) {
     case OFPUTIL_ACTION_INVALID:
 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
-#define OFPAT11_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
-#define OFPAT12_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
+#define OFPAT11_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) case OFPUTIL_##ENUM:
 #include "ofp-util.def"
         NOT_REACHED();
 
@@ -363,7 +362,7 @@ ofpact_from_nxast(const union ofp_action *a, enum ofputil_action_code code,
         break;
 
     case OFPUTIL_NXAST_DEC_TTL:
-        error = dec_ttl_from_openflow(out);
+        error = dec_ttl_from_openflow(out, code);
         break;
 
     case OFPUTIL_NXAST_DEC_TTL_CNT_IDS:
@@ -397,8 +396,7 @@ ofpact_from_openflow10(const union ofp_action *a, struct ofpbuf *out)
 
     switch (code) {
     case OFPUTIL_ACTION_INVALID:
-#define OFPAT11_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
-#define OFPAT12_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
+#define OFPAT11_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) case OFPUTIL_##ENUM:
 #include "ofp-util.def"
         NOT_REACHED();
 
@@ -609,19 +607,24 @@ static enum ofperr
 decode_openflow11_action(const union ofp_action *a,
                          enum ofputil_action_code *code)
 {
+    uint16_t len;
+
     switch (a->type) {
     case CONSTANT_HTONS(OFPAT11_EXPERIMENTER):
         return decode_nxast_action(a, code);
 
-#define OFPAT11_ACTION(ENUM, STRUCT, NAME)                          \
-        case CONSTANT_HTONS(ENUM):                                  \
-            if (a->header.len == htons(sizeof(struct STRUCT))) {    \
-                *code = OFPUTIL_##ENUM;                             \
-                return 0;                                           \
-            } else {                                                \
-                return OFPERR_OFPBAC_BAD_LEN;                       \
-            }                                                       \
-            break;
+#define OFPAT11_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME)  \
+        case CONSTANT_HTONS(ENUM):                      \
+            len = ntohs(a->header.len);                 \
+            if (EXTENSIBLE                              \
+                ? len >= sizeof(struct STRUCT)          \
+                : len == sizeof(struct STRUCT)) {       \
+                *code = OFPUTIL_##ENUM;                 \
+                return 0;                               \
+            } else {                                    \
+                return OFPERR_OFPBAC_BAD_LEN;           \
+            }                                           \
+            NOT_REACHED();
 #include "ofp-util.def"
 
     default:
@@ -661,7 +664,6 @@ ofpact_from_openflow11(const union ofp_action *a, struct ofpbuf *out)
     switch (code) {
     case OFPUTIL_ACTION_INVALID:
 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
-#define OFPAT12_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
 #include "ofp-util.def"
         NOT_REACHED();
 
@@ -683,6 +685,10 @@ ofpact_from_openflow11(const union ofp_action *a, struct ofpbuf *out)
         ofpact_put_SET_VLAN_PCP(out)->vlan_pcp = a->vlan_pcp.vlan_pcp;
         break;
 
+    case OFPUTIL_OFPAT11_POP_VLAN:
+        ofpact_put_STRIP_VLAN(out);
+        break;
+
     case OFPUTIL_OFPAT11_SET_DL_SRC:
         memcpy(ofpact_put_SET_ETH_SRC(out)->mac,
                ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
@@ -693,6 +699,10 @@ ofpact_from_openflow11(const union ofp_action *a, struct ofpbuf *out)
                ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
         break;
 
+    case OFPUTIL_OFPAT11_DEC_NW_TTL:
+        dec_ttl_from_openflow(out, code);
+        break;
+
     case OFPUTIL_OFPAT11_SET_NW_SRC:
         ofpact_put_SET_IPV4_SRC(out)->ipv4 = a->nw_addr.nw_addr;
         break;
@@ -716,6 +726,10 @@ ofpact_from_openflow11(const union ofp_action *a, struct ofpbuf *out)
         ofpact_put_SET_L4_DST_PORT(out)->port = ntohs(a->tp_port.tp_port);
         break;
 
+    case OFPUTIL_OFPAT12_SET_FIELD:
+        return nxm_reg_load_from_openflow12_set_field(
+            (const struct ofp12_action_set_field *)a, out);
+
 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) case OFPUTIL_##ENUM:
 #include "ofp-util.def"
         return ofpact_from_nxast(a, code, out);
@@ -952,11 +966,25 @@ ofpacts_pull_openflow11_instructions(struct ofpbuf *openflow,
             goto exit;
         }
     }
+    if (insts[OVSINST_OFPIT11_CLEAR_ACTIONS]) {
+        instruction_get_OFPIT11_CLEAR_ACTIONS(
+            insts[OVSINST_OFPIT11_CLEAR_ACTIONS]);
+        ofpact_put_CLEAR_ACTIONS(ofpacts);
+    }
+    /* TODO:XXX Write-Actions */
+    /* TODO:XXX Write-Metadata */
+    if (insts[OVSINST_OFPIT11_GOTO_TABLE]) {
+        const struct ofp11_instruction_goto_table *oigt;
+        struct ofpact_goto_table *ogt;
+
+        oigt = instruction_get_OFPIT11_GOTO_TABLE(
+            insts[OVSINST_OFPIT11_GOTO_TABLE]);
+        ogt = ofpact_put_GOTO_TABLE(ofpacts);
+        ogt->table_id = oigt->table_id;
+    }
 
-    if (insts[OVSINST_OFPIT11_GOTO_TABLE] ||
-        insts[OVSINST_OFPIT11_WRITE_METADATA] ||
-        insts[OVSINST_OFPIT11_WRITE_ACTIONS] ||
-        insts[OVSINST_OFPIT11_CLEAR_ACTIONS]) {
+    if (insts[OVSINST_OFPIT11_WRITE_METADATA] ||
+        insts[OVSINST_OFPIT11_WRITE_ACTIONS]) {
         error = OFPERR_OFPBIC_UNSUP_INST;
         goto exit;
     }
@@ -1034,6 +1062,10 @@ ofpact_check__(const struct ofpact *a, const struct flow *flow, int max_ports)
     case OFPACT_EXIT:
         return 0;
 
+    case OFPACT_CLEAR_ACTIONS:
+    case OFPACT_GOTO_TABLE:
+        return 0;
+
     default:
         NOT_REACHED();
     }
@@ -1249,6 +1281,8 @@ ofpact_to_nxast(const struct ofpact *a, struct ofpbuf *out)
     case OFPACT_SET_IPV4_DSCP:
     case OFPACT_SET_L4_SRC_PORT:
     case OFPACT_SET_L4_DST_PORT:
+    case OFPACT_CLEAR_ACTIONS:
+    case OFPACT_GOTO_TABLE:
         NOT_REACHED();
     }
 }
@@ -1338,6 +1372,11 @@ ofpact_to_openflow10(const struct ofpact *a, struct ofpbuf *out)
             = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
         break;
 
+    case OFPACT_CLEAR_ACTIONS:
+    case OFPACT_GOTO_TABLE:
+        /* TODO:XXX */
+        break;
+
     case OFPACT_CONTROLLER:
     case OFPACT_OUTPUT_REG:
     case OFPACT_BUNDLE:
@@ -1386,6 +1425,19 @@ ofpact_output_to_openflow11(const struct ofpact_output *output,
     oao->max_len = htons(output->max_len);
 }
 
+static void
+ofpact_dec_ttl_to_openflow11(const struct ofpact_cnt_ids *dec_ttl,
+                             struct ofpbuf *out)
+{
+    if (dec_ttl->n_controllers == 1 && dec_ttl->cnt_ids[0] == 0
+        && (!dec_ttl->ofpact.compat ||
+            dec_ttl->ofpact.compat == OFPUTIL_OFPAT11_DEC_NW_TTL)) {
+        ofputil_put_OFPAT11_DEC_NW_TTL(out);
+    } else {
+        ofpact_dec_ttl_to_nxast(dec_ttl, out);
+    }
+}
+
 static void
 ofpact_to_openflow11(const struct ofpact *a, struct ofpbuf *out)
 {
@@ -1408,7 +1460,7 @@ ofpact_to_openflow11(const struct ofpact *a, struct ofpbuf *out)
         break;
 
     case OFPACT_STRIP_VLAN:
-        /* XXX */
+        ofputil_put_OFPAT11_POP_VLAN(out);
         break;
 
     case OFPACT_SET_ETH_SRC:
@@ -1446,12 +1498,19 @@ ofpact_to_openflow11(const struct ofpact *a, struct ofpbuf *out)
             = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
         break;
 
+    case OFPACT_DEC_TTL:
+        ofpact_dec_ttl_to_openflow11(ofpact_get_DEC_TTL(a), out);
+        break;
+
+    case OFPACT_CLEAR_ACTIONS:
+    case OFPACT_GOTO_TABLE:
+        NOT_REACHED();
+
     case OFPACT_CONTROLLER:
     case OFPACT_OUTPUT_REG:
     case OFPACT_BUNDLE:
     case OFPACT_REG_MOVE:
     case OFPACT_REG_LOAD:
-    case OFPACT_DEC_TTL:
     case OFPACT_SET_TUNNEL:
     case OFPACT_SET_QUEUE:
     case OFPACT_POP_QUEUE:
@@ -1484,18 +1543,10 @@ ofpacts_put_openflow11_actions(const struct ofpact ofpacts[],
     return openflow->size - start_size;
 }
 
-void
-ofpacts_put_openflow11_instructions(const struct ofpact ofpacts[],
-                                    size_t ofpacts_len,
-                                    struct ofpbuf *openflow)
+static void
+ofpacts_update_instruction_actions(struct ofpbuf *openflow, size_t ofs)
 {
     struct ofp11_instruction_actions *oia;
-    size_t ofs;
-
-    /* Put an OFPIT11_APPLY_ACTIONS instruction and fill it in. */
-    ofs = openflow->size;
-    instruction_put_OFPIT11_APPLY_ACTIONS(openflow);
-    ofpacts_put_openflow11_actions(ofpacts, ofpacts_len, openflow);
 
     /* Update the instruction's length (or, if it's empty, delete it). */
     oia = ofpbuf_at_assert(openflow, ofs, sizeof *oia);
@@ -1505,6 +1556,46 @@ ofpacts_put_openflow11_instructions(const struct ofpact ofpacts[],
         openflow->size = ofs;
     }
 }
+
+void
+ofpacts_put_openflow11_instructions(const struct ofpact ofpacts[],
+                                    size_t ofpacts_len,
+                                    struct ofpbuf *openflow)
+{
+    const struct ofpact *a;
+
+    OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
+        /* TODO:XXX Write-Actions */
+        /* TODO:XXX Write-Metadata */
+        if (a->type == OFPACT_CLEAR_ACTIONS) {
+            instruction_put_OFPIT11_CLEAR_ACTIONS(openflow);
+        } else if (a->type == OFPACT_GOTO_TABLE) {
+            struct ofp11_instruction_goto_table *oigt;
+
+            oigt = instruction_put_OFPIT11_GOTO_TABLE(openflow);
+            oigt->table_id = ofpact_get_GOTO_TABLE(a)->table_id;
+            memset(oigt->pad, 0, sizeof oigt->pad);
+        } else if (!ofpact_is_instruction(a)) {
+            /* Apply-actions */
+            const size_t ofs = openflow->size;
+            const size_t ofpacts_len_left =
+                (uint8_t*)ofpact_end(ofpacts, ofpacts_len) - (uint8_t*)a;
+            const struct ofpact *action;
+            const struct ofpact *processed = a;
+
+            instruction_put_OFPIT11_APPLY_ACTIONS(openflow);
+            OFPACT_FOR_EACH(action, a, ofpacts_len_left) {
+                if (ofpact_is_instruction(action)) {
+                    break;
+                }
+                ofpact_to_openflow11(action, openflow);
+                processed = action;
+            }
+            ofpacts_update_instruction_actions(openflow, ofs);
+            a = processed;
+        }
+    }
+}
 \f
 /* Returns true if 'action' outputs to 'port', false otherwise. */
 static bool
@@ -1543,6 +1634,8 @@ ofpact_outputs_to_port(const struct ofpact *ofpact, uint16_t port)
     case OFPACT_AUTOPATH:
     case OFPACT_NOTE:
     case OFPACT_EXIT:
+    case OFPACT_CLEAR_ACTIONS:
+    case OFPACT_GOTO_TABLE:
     default:
         return false;
     }
@@ -1770,7 +1863,8 @@ ofpact_format(const struct ofpact *a, struct ds *s)
     case OFPACT_RESUBMIT:
         resubmit = ofpact_get_RESUBMIT(a);
         if (resubmit->in_port != OFPP_IN_PORT && resubmit->table_id == 255) {
-            ds_put_format(s, "resubmit:%"PRIu16, resubmit->in_port);
+            ds_put_cstr(s, "resubmit:");
+            ofputil_format_port(resubmit->in_port, s);
         } else {
             ds_put_format(s, "resubmit(");
             if (resubmit->in_port != OFPP_IN_PORT) {
@@ -1794,7 +1888,9 @@ ofpact_format(const struct ofpact *a, struct ds *s)
 
     case OFPACT_AUTOPATH:
         autopath = ofpact_get_AUTOPATH(a);
-        ds_put_format(s, "autopath(%u,", autopath->port);
+        ds_put_cstr(s, "autopath(");
+        ofputil_format_port(autopath->port, s);
+        ds_put_char(s, ',');
         mf_format_subfield(&autopath->dst, s);
         ds_put_char(s, ')');
         break;
@@ -1806,6 +1902,19 @@ ofpact_format(const struct ofpact *a, struct ds *s)
     case OFPACT_EXIT:
         ds_put_cstr(s, "exit");
         break;
+
+    case OFPACT_CLEAR_ACTIONS:
+        ds_put_format(s, "%s",
+                      ofpact_instruction_name_from_type(
+                          OVSINST_OFPIT11_CLEAR_ACTIONS));
+        break;
+
+    case OFPACT_GOTO_TABLE:
+        ds_put_format(s, "%s:%"PRIu8,
+                      ofpact_instruction_name_from_type(
+                          OVSINST_OFPIT11_GOTO_TABLE),
+                      ofpact_get_GOTO_TABLE(a)->table_id);
+        break;
     }
 }
 
@@ -1825,6 +1934,9 @@ ofpacts_format(const struct ofpact *ofpacts, size_t ofpacts_len,
             if (a != ofpacts) {
                 ds_put_cstr(string, ",");
             }
+
+            /* TODO:XXX write-actions */
+            /* TODO:XXX write-metadata */
             ofpact_format(a, string);
         }
     }
@@ -1883,3 +1995,15 @@ ofpact_pad(struct ofpbuf *ofpacts)
         ofpbuf_put_zeros(ofpacts, OFPACT_ALIGNTO - rem);
     }
 }
+
+void
+ofpact_set_field_init(struct ofpact_reg_load *load, const struct mf_field *mf,
+                      const void *src)
+{
+    load->ofpact.compat = OFPUTIL_OFPAT12_SET_FIELD;
+    load->dst.field = mf;
+    load->dst.ofs = 0;
+    load->dst.n_bits = mf->n_bits;
+    bitwise_copy(src, mf->n_bytes, load->dst.ofs,
+                 &load->subvalue, sizeof load->subvalue, 0, mf->n_bits);
+}