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网络管理实验1：ASN.1软件应用

news 2025/9/26 7:28:16

兰生幽谷，不为莫服而不芳；

君子行义，不为莫知而止休。

一. 实验目的

1. 掌握搭建C环境下ASN.1编码环境；

2. 掌握抽象语法表示asn文件的编码和编译方法；

3.试着按指定asn方法编制基本的ASN.1宏定义结构。

二. 实验内容

1.掌握ASN1C的安装方法；

2.掌握ASN宏定义数据结构；

3.根据下面的内容按宏定义的方法编制成ASN.1脚本程序并编译。

假如一个公司拥有一个连接了数个销售网点的仓库，进货保存在这个仓库里，出货从这个仓库中调出。这个公司需要一个具有以下特征的协议：
定单收集在本地销售网点处；
它们被发送到仓库，在那里管理着交付货物手续；
通过客户的要求，交付的回执必须送回销售网点做下一步处理。

三. 实验工具

VMware workstation 17.5pro、Mobaxterm、gcc、gcc-c++、perl、ASNC

四. 实验步骤

1.准备安装包

百度网盘下载ASN安装包asn1c-0.9.28.tar.gz，拖入自己所建专用文件夹。

2.安装必要工具和依赖关系

yum install -y gcc gcc-c++ perl

3.解压

tar xvf asn1c-0.9.28.tar.gz

4.编译

cd asn1c-0.9.28/

[root@wzz asn1c-0.9.28]# ls

aclocal.m4 config.log FAQ m4 stu

asn1c config.status INSTALL.md Makefile student

AUTHORS config.sub libasn1compiler Makefile.am tests

BUGS configure libasn1fix Makefile.in TODO

ChangeLog configure.ac libasn1parser myHttp

config depcomp libasn1print README.md

config.h doc libtool skeletons

config.h.in examples LICENSE stamp-h1

[root@wzz asn1c-0.9.28]# ./configure

\checking for a BSD-compatible install... /usr/bin/install -c

checking whether build environment is sane... yes

/wzz/asn1c928/asn1c-0.9.28/config/missing: Unknown `--is-lightweight' option

Try `/wzz/asn1c928/asn1c-0.9.28/config/missing --help' for more information

configure: WARNING: 'missing' script is too old or missing

checking for a thread-safe mkdir -p... /usr/bin/mkdir -p

checking for gawk... gawk

……

checking dependency style of gcc... gcc3

checking for a sed that does not truncate output... /usr/bin/sed

checking for grep that handles long lines and -e... /usr/bin/grep

checking for egrep... /usr/bin/grep -E

checking for fgrep... /usr/bin/grep -F

……

checking how to run the C preprocessor... gcc -E

checking for ANSI C header files... yes

checking for sys/types.h... yes

checking for sys/stat.h... yes

checking for stdlib.h... yes

checking for string.h... yes

checking for memory.h... yes

checking for strings.h... yes

checking for inttypes.h... yes

checking for stdint.h... yes

checking for unistd.h... yes

checking for dlfcn.h... yes

checking for objdir... .libs

checking if gcc supports -fno-rtti -fno-exceptions... no

checking for gcc option to produce PIC... -fPIC -DPIC

checking if gcc PIC flag -fPIC -DPIC works... yes

checking if gcc static flag -static works... no

checking if gcc supports -c -o file.o... yes

checking if gcc supports -c -o file.o... (cached) yes

checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes

……

checking whether gcc accepts -g... (cached) yes

checking for gcc option to accept ISO C89... (cached) none needed

checking whether gcc understands -c and -o together... (cached) yes

checking dependency style of gcc... (cached) gcc3

checking how to run the C preprocessor... gcc -E

checking whether ln -s works... yes

checking whether make sets $(MAKE)... (cached) yes

checking for bison... no

……

有错就自行排错。直到编译完成。

5.安装

[root@wzz asn1c-0.9.28]# make && make install

make all-recursive

make[1]: 进入目录“/wzz/asn1c928/asn1c-0.9.28”

Making all in libasn1parser

……

make[2]: 离开目录“/wzz/asn1c928/asn1c-0.9.28”

make[1]: 离开目录“/wzz/asn1c928/asn1c-0.9.28”

有错就自行排错。直到安装完成。

6.退到自己专用目录，创建工程test目录

[root@wzz asn1c-0.9.28]# cd ..

[root@wzz asn1c928]# cd ..

[root@wzz wzz]# mkdir test

[root@wzz wzz]# cd test

[root@wzz test]#

创建个人信息的ASN宏

vi resume.asn

#以下是该宏文件的内容

MsgTest DEFINITIONS::=BEGIN

Msg::=SEQUENCE{

birthday NumericString(SIZE(8)),

studentnum NumericString(SIZE(9)),

domitory IA5String(SIZE(60)),

name IA5String(SIZE(60))

}

END

赋权

chmod +x resume.asn

编译生成各种头文件、链接及源文件

[root@wzz test]# asn1c -gen-PER *.asn

Compiled Msg.c

Compiled Msg.h

Copied /usr/local/share/asn1c/IA5String.h -> IA5String.h

Copied /usr/local/share/asn1c/IA5String.c -> IA5String.c

Copied /usr/local/share/asn1c/NumericString.h -> NumericString.h

Copied /usr/local/share/asn1c/NumericString.c -> NumericString.c

Copied /usr/local/share/asn1c/constr_SEQUENCE.h -> constr_SEQUENCE.h

Copied /usr/local/share/asn1c/constr_SEQUENCE.c -> constr_SEQUENCE.c

Copied /usr/local/share/asn1c/asn_application.h -> asn_application.h

Copied /usr/local/share/asn1c/asn_system.h -> asn_system.h

Copied /usr/local/share/asn1c/asn_codecs.h -> asn_codecs.h

Copied /usr/local/share/asn1c/asn_internal.h -> asn_internal.h

Copied /usr/local/share/asn1c/OCTET_STRING.h -> OCTET_STRING.h

Copied /usr/local/share/asn1c/OCTET_STRING.c -> OCTET_STRING.c

Copied /usr/local/share/asn1c/BIT_STRING.h -> BIT_STRING.h

Copied /usr/local/share/asn1c/BIT_STRING.c -> BIT_STRING.c

Copied /usr/local/share/asn1c/asn_codecs_prim.c -> asn_codecs_prim.c

Copied /usr/local/share/asn1c/asn_codecs_prim.h -> asn_codecs_prim.h

Copied /usr/local/share/asn1c/ber_tlv_length.h -> ber_tlv_length.h

Copied /usr/local/share/asn1c/ber_tlv_length.c -> ber_tlv_length.c

Copied /usr/local/share/asn1c/ber_tlv_tag.h -> ber_tlv_tag.h

Copied /usr/local/share/asn1c/ber_tlv_tag.c -> ber_tlv_tag.c

Copied /usr/local/share/asn1c/ber_decoder.h -> ber_decoder.h

Copied /usr/local/share/asn1c/ber_decoder.c -> ber_decoder.c

Copied /usr/local/share/asn1c/der_encoder.h -> der_encoder.h

Copied /usr/local/share/asn1c/der_encoder.c -> der_encoder.c

Copied /usr/local/share/asn1c/constr_TYPE.h -> constr_TYPE.h

Copied /usr/local/share/asn1c/constr_TYPE.c -> constr_TYPE.c

Copied /usr/local/share/asn1c/constraints.h -> constraints.h

Copied /usr/local/share/asn1c/constraints.c -> constraints.c

Copied /usr/local/share/asn1c/xer_support.h -> xer_support.h

Copied /usr/local/share/asn1c/xer_support.c -> xer_support.c

Copied /usr/local/share/asn1c/xer_decoder.h -> xer_decoder.h

Copied /usr/local/share/asn1c/xer_decoder.c -> xer_decoder.c

Copied /usr/local/share/asn1c/xer_encoder.h -> xer_encoder.h

Copied /usr/local/share/asn1c/xer_encoder.c -> xer_encoder.c

Copied /usr/local/share/asn1c/per_support.h -> per_support.h

Copied /usr/local/share/asn1c/per_support.c -> per_support.c

Copied /usr/local/share/asn1c/per_decoder.h -> per_decoder.h

Copied /usr/local/share/asn1c/per_decoder.c -> per_decoder.c

Copied /usr/local/share/asn1c/per_encoder.h -> per_encoder.h

Copied /usr/local/share/asn1c/per_encoder.c -> per_encoder.c

Copied /usr/local/share/asn1c/per_opentype.h -> per_opentype.h

Copied /usr/local/share/asn1c/per_opentype.c -> per_opentype.c

Copied /usr/local/share/asn1c/converter-sample.c -> converter-sample.c

Generated Makefile.am.sample

查看一下我们定义的Msg源文件和头文件：

[root@wzz test]# cat Msg.c

* Generated by asn1c-0.9.28 (http://lionet.info/asn1c)

* From ASN.1 module "MsgTest"

* found in "resume.asn"

* `asn1c -gen-PER`

#include "Msg.h"

static const int permitted_alphabet_table_2[256] = {

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* . */

2, 3, 4, 5, 6, 7, 8, 9,10,11, 0, 0, 0, 0, 0, 0, /* 0123456789 */

};

……

载看看头文件

[root@wzz test]# cat Msg.h

* Generated by asn1c-0.9.28 (http://lionet.info/asn1c)

* From ASN.1 module "MsgTest"

* found in "resume.asn"

* `asn1c -gen-PER`

#ifndef _Msg_H_

#define _Msg_H_

#include <asn_application.h>

/* Including external dependencies */

#include <NumericString.h>

#include <IA5String.h>

#include <constr_SEQUENCE.h>

#ifdef __cplusplus

extern "C" {

#endif

/* Msg */

typedef struct Msg {

NumericString_t birthday;

NumericString_t studentnum;

IA5String_t domitory;

IA5String_t name;

/* Context for parsing across buffer boundaries */

asn_struct_ctx_t _asn_ctx;

} Msg_t;

/* Implementation */

extern asn_TYPE_descriptor_t asn_DEF_Msg;

#ifdef __cplusplus

}

#endif

#endif /* _Msg_H_ */

#include <asn_internal.h>

7.编制一个订单处理的ASN宏程序

分析设计过程略。直接给出结果：

Module-order DEFINITIONS AUTOMATIC TAGS::=BEGIN

Order::=SEQUENCE{

header Order-header,

items SEQUENCE OF Order-line}

Order-header::=SEQUENCE{

number Order-number,

date Date,client Client,

payment Payment-method}

Order-number::=NumericString(SIZE(12))

Date::=NumericString(SIZE(8)) -- MMDDYYYY

Client::=SEQUENCE{

name PrintableString(SIZE(1..20)),

street PrintableString(SIZE(1..50)) OPTIONAL,

postcode NumericString(SIZE(5)),

town PrintableString(SIZE(1..30)),

country PrintableString(SIZE(1..20))

DEFAULT default-country}

default-country PrintableString::="PR China"

Payment-method::=CHOICE{

check NumericString(SIZE(15)),

credit-card Credit-card,

cash NULL}

Credit-card::=SEQUENCE{

type Card-type,

number NumericString(SIZE(20)),

expiry-date NumericString(SIZE(6)) -- MMYYYY --}

Card-type::=ENUMERATED{yl(0),visa(1),eurocard(2),diners(3),american-express(4)}

Order-line::=SEQUENCE{

item-code Item-code,

label Label,

quantity Quantity,

price Cents}

Item-code::=NumericString(SIZE(7))

Label::=PrintableString(SIZE(1..30))

Quantity::=CHOICE{unites INTEGER,

millimetres INTEGER,

milligrammes INTEGER}

Cents::=INTEGER

Delivery-report::=SEQUENCE{order-code Order-number,

delivery SEQUENCE OF Delivery-line}

Delivery-line::=SEQUENCE{item Item-code,

quantity Quantity}

END

Protocol DEFINITIONS AUTOMATIC TAGS::=BEGIN

IMPORTS Order,Delivery-report,Item-code,Quantity,

Order-number FROM Module-order;

PDU::=CHOICE{question CHOICE{

question1 Order,

question2 Item-code,

question3 Order-number,

...},

answer CHOICE{

answer1 Delivery-report,

answer2 Quantity,

answer3 Delivery-report,

...}}

END

编译ASN宏

[root@wzz myOrder]# asn1c -gen-PER *.asn

Compiled Order.c

Compiled Order.h

Compiled Order-header.c

Compiled Order-header.h

Compiled Order-number.c

Compiled Order-number.h

Compiled Date.c

Compiled Date.h

Compiled Client.c

Compiled Client.h

Compiled Payment-method.c

Compiled Payment-method.h

Compiled Credit-card.c

Compiled Credit-card.h

Compiled Card-type.c

Compiled Card-type.h

Compiled Order-line.c

Compiled Order-line.h

Compiled Item-code.c

Compiled Item-code.h

Compiled Label.c

Compiled Label.h

Compiled Quantity.c

Compiled Quantity.h

Compiled Cents.c

Compiled Cents.h

Compiled Delivery-report.c

Compiled Delivery-report.h

Compiled Delivery-line.c

Compiled Delivery-line.h

Compiled PDU.c

Compiled PDU.h

Copied /usr/local/share/asn1c/BOOLEAN.h -> BOOLEAN.h

Copied /usr/local/share/asn1c/BOOLEAN.c -> BOOLEAN.c

Copied /usr/local/share/asn1c/INTEGER.h -> INTEGER.h

Copied /usr/local/share/asn1c/NativeEnumerated.h -> NativeEnumerated.h

Copied /usr/local/share/asn1c/INTEGER.c -> INTEGER.c

Copied /usr/local/share/asn1c/NULL.h -> NULL.h

Copied /usr/local/share/asn1c/NULL.c -> NULL.c

Copied /usr/local/share/asn1c/NativeEnumerated.c -> NativeEnumerated.c

Copied /usr/local/share/asn1c/NativeInteger.h -> NativeInteger.h

Copied /usr/local/share/asn1c/NativeInteger.c -> NativeInteger.c

Copied /usr/local/share/asn1c/NumericString.h -> NumericString.h

Copied /usr/local/share/asn1c/NumericString.c -> NumericString.c

Copied /usr/local/share/asn1c/PrintableString.h -> PrintableString.h

Copied /usr/local/share/asn1c/PrintableString.c -> PrintableString.c

Copied /usr/local/share/asn1c/asn_SEQUENCE_OF.h -> asn_SEQUENCE_OF.h

Copied /usr/local/share/asn1c/asn_SEQUENCE_OF.c -> asn_SEQUENCE_OF.c

Copied /usr/local/share/asn1c/asn_SET_OF.h -> asn_SET_OF.h

Copied /usr/local/share/asn1c/asn_SET_OF.c -> asn_SET_OF.c

Copied /usr/local/share/asn1c/constr_CHOICE.h -> constr_CHOICE.h

Copied /usr/local/share/asn1c/constr_CHOICE.c -> constr_CHOICE.c

Copied /usr/local/share/asn1c/constr_SEQUENCE.h -> constr_SEQUENCE.h

Copied /usr/local/share/asn1c/constr_SEQUENCE.c -> constr_SEQUENCE.c

Copied /usr/local/share/asn1c/constr_SEQUENCE_OF.h -> constr_SEQUENCE_OF.h

Copied /usr/local/share/asn1c/constr_SEQUENCE_OF.c -> constr_SEQUENCE_OF.c

Copied /usr/local/share/asn1c/constr_SET_OF.h -> constr_SET_OF.h

Copied /usr/local/share/asn1c/constr_SET_OF.c -> constr_SET_OF.c