网络抓包APP开发，报错:eth0: You don't have permission to perform this capture on that device (socket: Operation not permitted)

【问题描述】

1. 使用libpcap.so，编写native代码调用

2. pcap_t *handle = pcap_open_live(device->name, BUFSIZ, 1, 1000, errbuf);
           if (handle == NULL) {
               OH_LOG_ERROR(LOG_APP, "Open - pcap_open_live failure %{public}s", errbuf);
               return -1;
           }
   

3. Open - pcap_open_live failure eth0: You don't have permission to perform this capture on that device (socket: Operation not permitted)

4. 把网络相关的权限都配置了

   "requestPermissions": [
               {
                   "name": "ohos.permission.INTERNET", //socket权限
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.GET_NETWORK_INFO",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.GET_WIFI_INFO",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.MANAGE_NET_STRATEGY",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.CONNECTIVITY_INTERNAL",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.NETSYS_INTERNAL",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.ENTERPRISE_GET_NETWORK_INFO",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.ENTERPRISE_SET_NETWORK",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.ENTERPRISE_MANAGE_NETWORK",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.RUN_ANY_CODE",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.SET_NETWORK_INFO",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               },
               {
                   "name" : "ohos.permission.GET_NETWORK_STATS",
                   "usedScene": {
                       "abilities": [
                           "MainAbility"
                       ],
                       "when":"always"
                   }
               }
           ]
       }

5. 可以正常网络包

【运行环境】

硬件：RK3568 ROM版本：4.0.10 DevEvoStudio版本：4.0 SDK版本：10

看看 selinux 和 应用权限（是不是系统应用）

回复 深开鸿_王石: selinux 是关闭的，应用权限对libpcap不起作用。感觉是linux内核机制只有root才可以抓包

回复 yuhaoooooooo: 你这里是直接用app去open一个设备节点，所以你要看看这个节点权限是啥，他是不是能被用户账号访问，还是只能root访问，简单改法呢就是chmod，要不就是你把应用改成系统应用

只有root可以使用tcpdump

回复 kuaile: 但是ohos的机制，app不是root运行的，而是uid 100。改如何破局？

回复 yuhaoooooooo: 系统应用啊，或者自己改对应的权限：）