Fix binapigen decoding and minor improvements

- fixed allocating byte slices before copying decoded data
- simplified encoding functions
- several minor improvements

Change-Id: I6669424b89eb86333805cb1b57e4551169980cc2
Signed-off-by: Ondrej Fabry <ofabry@cisco.com>

1 files changed, 841 insertions, 0 deletions

diff --git a/internal/testbinapi/binapi2001/.vppapi/plugins/l3xc.api.json b/internal/testbinapi/binapi2001/.vppapi/plugins/l3xc.api.json
new file mode 100644
index 0000000..bec72fb
--- /dev/null
+++ b/internal/testbinapi/binapi2001/.vppapi/plugins/l3xc.api.json
@@ -0,0 +1,841 @@
+{
+    "types": [
+        [
+            "address",
+            [
+                "vl_api_address_family_t",
+                "af"
+            ],
+            [
+                "vl_api_address_union_t",
+                "un"
+            ]
+        ],
+        [
+            "prefix",
+            [
+                "vl_api_address_t",
+                "address"
+            ],
+            [
+                "u8",
+                "len"
+            ]
+        ],
+        [
+            "mprefix",
+            [
+                "vl_api_address_family_t",
+                "af"
+            ],
+            [
+                "u16",
+                "grp_address_length"
+            ],
+            [
+                "vl_api_address_union_t",
+                "grp_address"
+            ],
+            [
+                "vl_api_address_union_t",
+                "src_address"
+            ]
+        ],
+        [
+            "ip6_prefix",
+            [
+                "vl_api_ip6_address_t",
+                "address"
+            ],
+            [
+                "u8",
+                "len"
+            ]
+        ],
+        [
+            "ip4_prefix",
+            [
+                "vl_api_ip4_address_t",
+                "address"
+            ],
+            [
+                "u8",
+                "len"
+            ]
+        ],
+        [
+            "prefix_matcher",
+            [
+                "u8",
+                "le"
+            ],
+            [
+                "u8",
+                "ge"
+            ]
+        ],
+        [
+            "fib_mpls_label",
+            [
+                "u8",
+                "is_uniform"
+            ],
+            [
+                "u32",
+                "label"
+            ],
+            [
+                "u8",
+                "ttl"
+            ],
+            [
+                "u8",
+                "exp"
+            ]
+        ],
+        [
+            "fib_path_nh",
+            [
+                "vl_api_address_union_t",
+                "address"
+            ],
+            [
+                "u32",
+                "via_label"
+            ],
+            [
+                "u32",
+                "obj_id"
+            ],
+            [
+                "u32",
+                "classify_table_index"
+            ]
+        ],
+        [
+            "fib_path",
+            [
+                "u32",
+                "sw_if_index"
+            ],
+            [
+                "u32",
+                "table_id"
+            ],
+            [
+                "u32",
+                "rpf_id"
+            ],
+            [
+                "u8",
+                "weight"
+            ],
+            [
+                "u8",
+                "preference"
+            ],
+            [
+                "vl_api_fib_path_type_t",
+                "type"
+            ],
+            [
+                "vl_api_fib_path_flags_t",
+                "flags"
+            ],
+            [
+                "vl_api_fib_path_nh_proto_t",
+                "proto"
+            ],
+            [
+                "vl_api_fib_path_nh_t",
+                "nh"
+            ],
+            [
+                "u8",
+                "n_labels"
+            ],
+            [
+                "vl_api_fib_mpls_label_t",
+                "label_stack",
+                16
+            ]
+        ],
+        [
+            "l3xc",
+            [
+                "vl_api_interface_index_t",
+                "sw_if_index"
+            ],
+            [
+                "bool",
+                "is_ip6"
+            ],
+            [
+                "u8",
+                "n_paths"
+            ],
+            [
+                "vl_api_fib_path_t",
+                "paths",
+                0,
+                "n_paths"
+            ]
+        ]
+    ],
+    "messages": [
+        [
+            "l3xc_plugin_get_version",
+            [
+                "u16",
+                "_vl_msg_id"
+            ],
+            [
+                "u32",
+                "client_index"
+            ],
+            [
+                "u32",
+                "context"
+            ],
+            {
+                "crc": "0x51077d14"
+            }
+        ],
+        [
+            "l3xc_plugin_get_version_reply",
+            [
+                "u16",
+                "_vl_msg_id"
+            ],
+            [
+                "u32",
+                "context"
+            ],
+            [
+                "u32",
+                "major"
+            ],
+            [
+                "u32",
+                "minor"
+            ],
+            {
+                "crc": "0x9b32cf86"
+            }
+        ],
+        [
+            "l3xc_update",
+            [
+                "u16",
+                "_vl_msg_id"
+            ],
+            [
+                "u32",
+                "client_index"
+            ],
+            [
+                "u32",
+                "context"
+            ],
+            [
+                "vl_api_l3xc_t",
+                "l3xc"
+            ],
+            {
+                "crc": "0x0787b1d3"
+            }
+        ],
+        [
+            "l3xc_update_reply",
+            [
+                "u16",
+                "_vl_msg_id"
+            ],
+            [
+                "u32",
+                "context"
+            ],
+            [
+                "i32",
+                "retval"
+            ],
+            [
+                "u32",
+                "stats_index"
+            ],
+            {
+                "crc": "0x1992deab"
+            }
+        ],
+        [
+            "l3xc_del",
+            [
+                "u16",
+                "_vl_msg_id"
+            ],
+            [
+                "u32",
+                "client_index"
+            ],
+            [
+                "u32",
+                "context"
+            ],
+            [
+                "vl_api_interface_index_t",
+                "sw_if_index"
+            ],
+            [
+                "bool",
+                "is_ip6"
+            ],
+            {
+                "crc": "0xe7dbef91"
+            }
+        ],
+        [
+            "l3xc_del_reply",
+            [
+                "u16",
+                "_vl_msg_id"
+            ],
+            [
+                "u32",
+                "context"
+            ],
+            [
+                "i32",
+                "retval"
+            ],
+            {
+                "crc": "0xe8d4e804"
+            }
+        ],
+        [
+            "l3xc_dump",
+            [
+                "u16",
+                "_vl_msg_id"
+            ],
+            [
+                "u32",
+                "client_index"
+            ],
+            [
+                "u32",
+                "context"
+            ],
+            [
+                "vl_api_interface_index_t",
+                "sw_if_index"
+            ],
+            {
+                "crc": "0xf9e6675e"
+            }
+        ],
+        [
+            "l3xc_details",
+            [
+                "u16",
+                "_vl_msg_id"
+            ],
+            [
+                "u32",
+                "context"
+            ],
+            [
+                "vl_api_l3xc_t",
+                "l3xc"
+            ],
+            {
+                "crc": "0xd4f69627"
+            }
+        ]
+    ],
+    "unions": [
+        [
+            "address_union",
+            [
+                "vl_api_ip4_address_t",
+                "ip4"
+            ],
+            [
+                "vl_api_ip6_address_t",
+                "ip6"
+            ]
+        ]
+    ],
+    "enums": [
+        [
+            "address_family",
+            [
+                "ADDRESS_IP4",
+                0
+            ],
+            [
+                "ADDRESS_IP6",
+                1
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "ip_ecn",
+            [
+                "IP_API_ECN_NONE",
+                0
+            ],
+            [
+                "IP_API_ECN_ECT0",
+                1
+            ],
+            [
+                "IP_API_ECN_ECT1",
+                2
+            ],
+            [
+                "IP_API_ECN_CE",
+                3
+            ],
+            {
+                "enumtype": "u8"
+            }
+        ],
+        [
+            "ip_dscp",
+            [
+                "IP_API_DSCP_CS0",
+                0
+            ],
+            [
+                "IP_API_DSCP_CS1",
+                8
+            ],
+            [
+                "IP_API_DSCP_AF11",
+                10
+            ],
+            [
+                "IP_API_DSCP_AF12",
+                12
+            ],
+            [
+                "IP_API_DSCP_AF13",
+                14
+            ],
+            [
+                "IP_API_DSCP_CS2",
+                16
+            ],
+            [
+                "IP_API_DSCP_AF21",
+                18
+            ],
+            [
+                "IP_API_DSCP_AF22",
+                20
+            ],
+            [
+                "IP_API_DSCP_AF23",
+                22
+            ],
+            [
+                "IP_API_DSCP_CS3",
+                24
+            ],
+            [
+                "IP_API_DSCP_AF31",
+                26
+            ],
+            [
+                "IP_API_DSCP_AF32",
+                28
+            ],
+            [
+                "IP_API_DSCP_AF33",
+                30
+            ],
+            [
+                "IP_API_DSCP_CS4",
+                32
+            ],
+            [
+                "IP_API_DSCP_AF41",
+                34
+            ],
+            [
+                "IP_API_DSCP_AF42",
+                36
+            ],
+            [
+                "IP_API_DSCP_AF43",
+                38
+            ],
+            [
+                "IP_API_DSCP_CS5",
+                40
+            ],
+            [
+                "IP_API_DSCP_EF",
+                46
+            ],
+            [
+                "IP_API_DSCP_CS6",
+                48
+            ],
+            [
+                "IP_API_DSCP_CS7",
+                50
+            ],
+            {
+                "enumtype": "u8"
+            }
+        ],
+        [
+            "ip_proto",
+            [
+                "IP_API_PROTO_HOPOPT",
+                0
+            ],
+            [
+                "IP_API_PROTO_ICMP",
+                1
+            ],
+            [
+                "IP_API_PROTO_IGMP",
+                2
+            ],
+            [
+                "IP_API_PROTO_TCP",
+                6
+            ],
+            [
+                "IP_API_PROTO_UDP",
+                17
+            ],
+            [
+                "IP_API_PROTO_GRE",
+                47
+            ],
+            [
+                "IP_API_PROTO_AH",
+                50
+            ],
+            [
+                "IP_API_PROTO_ESP",
+                51
+            ],
+            [
+                "IP_API_PROTO_EIGRP",
+                88
+            ],
+            [
+                "IP_API_PROTO_OSPF",
+                89
+            ],
+            [
+                "IP_API_PROTO_SCTP",
+                132
+            ],
+            [
+                "IP_API_PROTO_RESERVED",
+                255
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "fib_path_nh_proto",
+            [
+                "FIB_API_PATH_NH_PROTO_IP4",
+                0
+            ],
+            [
+                "FIB_API_PATH_NH_PROTO_IP6",
+                1
+            ],
+            [
+                "FIB_API_PATH_NH_PROTO_MPLS",
+                2
+            ],
+            [
+                "FIB_API_PATH_NH_PROTO_ETHERNET",
+                3
+            ],
+            [
+                "FIB_API_PATH_NH_PROTO_BIER",
+                4
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "fib_path_flags",
+            [
+                "FIB_API_PATH_FLAG_NONE",
+                0
+            ],
+            [
+                "FIB_API_PATH_FLAG_RESOLVE_VIA_ATTACHED",
+                1
+            ],
+            [
+                "FIB_API_PATH_FLAG_RESOLVE_VIA_HOST",
+                2
+            ],
+            [
+                "FIB_API_PATH_FLAG_POP_PW_CW",
+                4
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "fib_path_type",
+            [
+                "FIB_API_PATH_TYPE_NORMAL",
+                0
+            ],
+            [
+                "FIB_API_PATH_TYPE_LOCAL",
+                1
+            ],
+            [
+                "FIB_API_PATH_TYPE_DROP",
+                2
+            ],
+            [
+                "FIB_API_PATH_TYPE_UDP_ENCAP",
+                3
+            ],
+            [
+                "FIB_API_PATH_TYPE_BIER_IMP",
+                4
+            ],
+            [
+                "FIB_API_PATH_TYPE_ICMP_UNREACH",
+                5
+            ],
+            [
+                "FIB_API_PATH_TYPE_ICMP_PROHIBIT",
+                6
+            ],
+            [
+                "FIB_API_PATH_TYPE_SOURCE_LOOKUP",
+                7
+            ],
+            [
+                "FIB_API_PATH_TYPE_DVR",
+                8
+            ],
+            [
+                "FIB_API_PATH_TYPE_INTERFACE_RX",
+                9
+            ],
+            [
+                "FIB_API_PATH_TYPE_CLASSIFY",
+                10
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "if_status_flags",
+            [
+                "IF_STATUS_API_FLAG_ADMIN_UP",
+                1
+            ],
+            [
+                "IF_STATUS_API_FLAG_LINK_UP",
+                2
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "mtu_proto",
+            [
+                "MTU_PROTO_API_L3",
+                1
+            ],
+            [
+                "MTU_PROTO_API_IP4",
+                2
+            ],
+            [
+                "MTU_PROTO_API_IP6",
+                3
+            ],
+            [
+                "MTU_PROTO_API_MPLS",
+                4
+            ],
+            [
+                "MTU_PROTO_API_N",
+                5
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "link_duplex",
+            [
+                "LINK_DUPLEX_API_UNKNOWN",
+                0
+            ],
+            [
+                "LINK_DUPLEX_API_HALF",
+                1
+            ],
+            [
+                "LINK_DUPLEX_API_FULL",
+                2
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "sub_if_flags",
+            [
+                "SUB_IF_API_FLAG_NO_TAGS",
+                1
+            ],
+            [
+                "SUB_IF_API_FLAG_ONE_TAG",
+                2
+            ],
+            [
+                "SUB_IF_API_FLAG_TWO_TAGS",
+                4
+            ],
+            [
+                "SUB_IF_API_FLAG_DOT1AD",
+                8
+            ],
+            [
+                "SUB_IF_API_FLAG_EXACT_MATCH",
+                16
+            ],
+            [
+                "SUB_IF_API_FLAG_DEFAULT",
+                32
+            ],
+            [
+                "SUB_IF_API_FLAG_OUTER_VLAN_ID_ANY",
+                64
+            ],
+            [
+                "SUB_IF_API_FLAG_INNER_VLAN_ID_ANY",
+                128
+            ],
+            [
+                "SUB_IF_API_FLAG_MASK_VNET",
+                254
+            ],
+            [
+                "SUB_IF_API_FLAG_DOT1AH",
+                256
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "rx_mode",
+            [
+                "RX_MODE_API_UNKNOWN",
+                0
+            ],
+            [
+                "RX_MODE_API_POLLING",
+                1
+            ],
+            [
+                "RX_MODE_API_INTERRUPT",
+                2
+            ],
+            [
+                "RX_MODE_API_ADAPTIVE",
+                3
+            ],
+            [
+                "RX_MODE_API_DEFAULT",
+                4
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ],
+        [
+            "if_type",
+            [
+                "IF_API_TYPE_HARDWARE",
+                1
+            ],
+            [
+                "IF_API_TYPE_SUB",
+                2
+            ],
+            [
+                "IF_API_TYPE_P2P",
+                3
+            ],
+            [
+                "IF_API_TYPE_PIPE",
+                4
+            ],
+            {
+                "enumtype": "u32"
+            }
+        ]
+    ],
+    "services": {
+        "l3xc_plugin_get_version": {
+            "reply": "l3xc_plugin_get_version_reply"
+        },
+        "l3xc_update": {
+            "reply": "l3xc_update_reply"
+        },
+        "l3xc_del": {
+            "reply": "l3xc_del_reply"
+        },
+        "l3xc_dump": {
+            "reply": "l3xc_details",
+            "stream": true
+        }
+    },
+    "options": {
+        "version": "1.0.1"
+    },
+    "aliases": {
+        "ip4_address": {
+            "type": "u8",
+            "length": 4
+        },
+        "ip6_address": {
+            "type": "u8",
+            "length": 16
+        },
+        "address_with_prefix": {
+            "type": "vl_api_prefix_t"
+        },
+        "ip4_address_with_prefix": {
+            "type": "vl_api_ip4_prefix_t"
+        },
+        "ip6_address_with_prefix": {
+            "type": "vl_api_ip6_prefix_t"
+        },
+        "interface_index": {
+            "type": "u32"
+        }
+    },
+    "vl_api_version": "0x80b00c99"
+}