如何根据MIB库自动生成SNMP Agent代码--mib2c
一、环境准备
1、linux,samba,网络已连接
通过samba登录到fedora core的虚拟机上,启动虚拟机Fodera core,
ifconfig 查看eth1网卡的ip地址,eth1为桥接到办公网的网卡,假设IP地址为10.10.51.8
通过samba映射到windows,需要先检查samba服务是否已经启动
若已启动samba服务,映射samba目录
2、MIB库文件
二、操作步骤
1、编写MIB库文件
编写mib文件,并将mib文件拷贝至/user/local/share/snmp/mibs目录下
编写mib库的时候如果是表格,不可增删改的。不需要添加rowstatus,且index必须要设置成read-only,不能设置成not-accessiable
2、设置环境变量,使得可以用mib2c工具来生成相应的.c文件和.h文件
cd /user/local/share/snmp/mibs export MIBS=ALL 或 export MIBS=+NSCRTV-ROOT export MIBS=+NSCRTV-EPONEOC-ALARMS-MIB export MIBS=+NSCRTV-EPONEOC-PROPERTY-MIB export MIBS=+NSCRTV-EPONEOC-MOD-EOC-MIB export MIBS=+XXX-MIB # 根据实际的MIB库名称调整
3、查看OID是否能正常输出
snmptranslate -Ts -m ALL //查看所有MIB NODE输出情况 snmptranslate -IR XXXMIBNODE //就可以查看到某个具体的MIB NODE的相关信息
4、模板介绍:通过模板生成.c和.h文件
模板可以采用默认的模板或者自己写模板,默认的模板在/user/local/share/snmp/目录下面
进入你要存放生成代码的文件夹,通过模板生成.c和.h文件,默认的模板介绍如下:
scalars类型的节点:mib2c -c mib2c.scalar.conf XXXMIBNODE
Table类型的节点:mib2c -c mib2c.iterate_access.conf XXXMIBNODE
trap类型的节点:mib2c -c mib2c.notify.conf XXXMIBNODE
int scalars类型的节点:mib2c -c mib2c.int_watch.conf MIBNODE
承上,如果按需排序时:mib2c -c mib2c.array-user.conf MIBNODE
如果要产生Table上任一Column的header时:mib2c -c mib2c.column_defines.conf MIBNODE
如果是要产生Column上任一Enum的header時:mib2c -c mib2c.column_enums.conf MIBNODE
命令参考:
env MIBS="+NSCRTV-EPONEOC-MOD-EOC-MIB" mib2c -c ../../../mib2c.scalar.conf eocCBATAdminGroup env MIBS="+NSCRTV-EPONEOC-MOD-EOC-MIB" mib2c -c ../../mib2c.iterate_access.conf eocCBATCardRFTable env MIBS="+NSCRTV-EPONEOC-MOD-EOC-MIB" mib2c -c ../../mib2c.iterate_access.conf eocCBATAdminSNMPCommunityTable env MIBS="+NSCRTV-EPONEOC-MOD-EOC-MIB" mib2c -c ../../../mib2c.notify.conf eocNotifications
5、生成具体过程:
进入你要存放生成代码的文件夹,所有的模板在/user/local/share/snmp/目录下面
# mib2c -c ../../../mib2c.scalar.conf eocCBATAdminGroup
# env MIBS="+NSCRTV-EPONEOC-MOD-EOC-MIB" mib2c -c ../../mib2c.iterate_access.conf eocCBATCardRFTable
# env MIBS="+NSCRTV-EPONEOC-MOD-EOC-MIB" mib2c -c ../../../mib2c.iterate_access.conf eocCBATAdminSNMPCommunityTable
# env MIBS="+NSCRTV-EPONEOC-MOD-EOC-MIB" mib2c -c ../../mib2c.iterate_access.conf eocCBATCardRFTable writing to eocCBATCardRFTable.h writing to eocCBATCardRFTable_columns.h writing to eocCBATCardRFTable_enums.h writing to eocCBATCardRFTable.c writing to eocCBATCardRFTable_checkfns_local.h writing to eocCBATCardRFTable_checkfns_local.c writing to eocCBATCardRFTable_checkfns.h writing to eocCBATCardRFTable_checkfns.c writing to eocCBATCardRFTable_access.h writing to eocCBATCardRFTable_access.c writing to - ********************************************************************** NOTE: The only files you MUST modify should be the following:(要修改的地方) eocCBATCardRFTable_access.c(业务相关) eocCBATCardRFTable_access.h(路径相关) eocCBATCardRFTable_checkfns_local.h() eocCBATCardRFTable_checkfns_local.c ********************************************************************** running indent on eocCBATCardRFTable_access.c running indent on eocCBATCardRFTable_checkfns.c running indent on eocCBATCardRFTable_access.h running indent on eocCBATCardRFTable_enums.h running indent on eocCBATCardRFTable_columns.h running indent on eocCBATCardRFTable_checkfns_local.h running indent on eocCBATCardRFTable_checkfns_local.c running indent on eocCBATCardRFTable_checkfns.h running indent on eocCBATCardRFTable.h running indent on eocCBATCardRFTable.c #
6.修改代码,将修改后的代码拷贝至项目net-snmp-5.4.1/agent/mibgroup下面
1.xxxTable_checkfns.h: 修改前: /** make sure we load the functions that you can modify */ config_require(eocVLANTable_checkfns_local) 修改后:修改后的路径为实际工程中的编译路径 /** make sure we load the functions that you can modify */ config_require(eoc/nscrtv/vlanGroup/eocVLANTable_checkfns_local)
2.xxxTable.h 修改前: /** other required module components */ config_require(eocVLANTable_access) config_require(eocVLANTable_checkfns) 修改后: /** other required module components */ config_require(eoc/nscrtv/vlanGroup/eocVLANTable_access) config_require(eoc/nscrtv/vlanGroup/eocVLANTable_checkfns)
3.eocVLANTable.c 修改前: if (!data_context) { ci->data_context = eocVLANTable_create_data_context(table_info->indexes, COLUMN_): ci->new_row = 1; } else { ci->data_context = data_context; } netsnmp_oid_stash_add_data(&commitStorage, suffix + 1, suffix_len - 1, ci); 修改后: if (!data_context) { ci->data_context = eocVLANTable_create_data_context(table_info->indexes, table_info->colnum); ci->new_row = 1; } else { ci->data_context = data_context; } netsnmp_oid_stash_add_data(&commitStorage, suffix + 1, suffix_len - 1, ci);
注意事项:
生成表项的C代码的时候执行完命令mib2c ../../mib2c.iterate_access.conf wirelessProdWireless5GTable以后,会提示让你选择一些选项:选2 1 2