C++ (Cpp) dissect_dsmcc_adaptation_header示例

示例#1

文件： packet-mpeg-dsmcc.c 项目： SayCV/wireshark

static guint
dissect_dsmcc_header(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint offset,
            gboolean download_header)
{
    tvbuff_t   *sub_tvb;
    proto_item *pi;
    proto_tree *sub_tree;
    guint8		prot_disc;
    guint		reserved;
    guint8		adaptation_len;
    guint		len = 0;
    int			msg_id, tx_id;

    prot_disc = tvb_get_guint8(tvb, offset);
    reserved = tvb_get_guint8(tvb, 8+offset);
    adaptation_len = tvb_get_guint8(tvb, 9+offset);

    pi = proto_tree_add_text(tree, tvb, offset, 12+adaptation_len, "DSM-CC Header");
    sub_tree = proto_item_add_subtree(pi, ett_dsmcc_header);
    pi = proto_tree_add_item(sub_tree, hf_dsmcc_protocol_discriminator, tvb,
                 offset, 1, ENC_BIG_ENDIAN);
    if (0x11 != prot_disc) {
        PROTO_ITEM_SET_GENERATED(pi);
        expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR,
                    "Invalid value - should be 0x11");
    }
    offset +=1;
    proto_tree_add_item(sub_tree, hf_dsmcc_type, tvb,
        offset, 1, ENC_BIG_ENDIAN);
    offset +=1;
    if (TRUE == download_header) {
        msg_id = hf_dsmcc_dd_message_id;
        tx_id = hf_dsmcc_dd_download_id;
    } else {
        msg_id = hf_dsmcc_message_id;
        tx_id = hf_dsmcc_transaction_id;
    }
    proto_tree_add_item(sub_tree, msg_id, tvb,
        offset, 2, ENC_BIG_ENDIAN);
    offset += 2;
    proto_tree_add_item(sub_tree, tx_id, tvb,
        offset, 4, ENC_BIG_ENDIAN);
    offset += 4;
    pi = proto_tree_add_item(sub_tree, hf_dsmcc_header_reserved, tvb,
        offset, 1, ENC_BIG_ENDIAN);
    if (0xff != reserved) {
        PROTO_ITEM_SET_GENERATED(pi);
        expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR,
                    "Invalid value - should be 0xff");
    }
    offset +=1;

    proto_tree_add_item(sub_tree, hf_dsmcc_adaptation_length, tvb,
        offset, 1, ENC_BIG_ENDIAN);
    offset +=1;
    proto_tree_add_item(sub_tree, hf_dsmcc_message_length, tvb,
        offset, 2, ENC_BIG_ENDIAN);
    offset += 2;

    len = 12;
    if (0 < adaptation_len) {
        sub_tvb = tvb_new_subset(tvb, offset, adaptation_len, adaptation_len);
        dissect_dsmcc_adaptation_header(sub_tvb, pinfo, sub_tree);
        offset += adaptation_len;
    }

    return len;
}

示例#2

文件： packet-mpeg-dsmcc.c 项目： danielwhite84/wireshark

static guint
dissect_dsmcc_header(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint offset,
            gboolean download_header)
{
    tvbuff_t   *sub_tvb;
    proto_item *pi;
    proto_tree *sub_tree;
    guint8      prot_disc;
    guint       reserved;
    guint8      adaptation_len;
    guint       offset_start;
    int         msg_id, tx_id;

    offset_start = offset;

    prot_disc = tvb_get_guint8(tvb, offset);
    reserved = tvb_get_guint8(tvb, 8+offset);
    adaptation_len = tvb_get_guint8(tvb, 9+offset);

    sub_tree = proto_tree_add_subtree(tree, tvb, offset, 12+adaptation_len, ett_dsmcc_header, NULL, "DSM-CC Header");
    pi = proto_tree_add_item(sub_tree, hf_dsmcc_protocol_discriminator, tvb,
                 offset, 1, ENC_BIG_ENDIAN);
    if (DSMCC_PROT_DISC != prot_disc) {
        expert_add_info_format(pinfo, pi, &ei_dsmcc_invalid_value,
                    "Invalid value - should be 0x11");
    }
    offset +=1;
    proto_tree_add_item(sub_tree, hf_dsmcc_type, tvb,
        offset, 1, ENC_BIG_ENDIAN);
    offset +=1;
    if (TRUE == download_header) {
        msg_id = hf_dsmcc_dd_message_id;
        tx_id = hf_dsmcc_dd_download_id;
    } else {
        msg_id = hf_dsmcc_message_id;
        tx_id = hf_dsmcc_transaction_id;
    }
    proto_tree_add_item(sub_tree, msg_id, tvb,
        offset, 2, ENC_BIG_ENDIAN);
    offset += 2;
    proto_tree_add_item(sub_tree, tx_id, tvb,
        offset, 4, ENC_BIG_ENDIAN);
    offset += 4;
    pi = proto_tree_add_item(sub_tree, hf_dsmcc_header_reserved, tvb,
        offset, 1, ENC_BIG_ENDIAN);
    if (0xff != reserved) {
        expert_add_info_format(pinfo, pi, &ei_dsmcc_invalid_value,
                    "Invalid value - should be 0xff");
    }
    offset +=1;

    proto_tree_add_item(sub_tree, hf_dsmcc_adaptation_length, tvb,
        offset, 1, ENC_BIG_ENDIAN);
    offset +=1;
    proto_tree_add_item(sub_tree, hf_dsmcc_message_length, tvb,
        offset, 2, ENC_BIG_ENDIAN);
    offset += 2;

    if (0 < adaptation_len) {
        sub_tvb = tvb_new_subset_length(tvb, offset, adaptation_len);
        dissect_dsmcc_adaptation_header(sub_tvb, pinfo, sub_tree);
        offset += adaptation_len;
    }

    return offset-offset_start;
}