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标题: 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) [打印本页]

作者: yuhaoooooooo 时间: 2024-9-11 18:45
标题: 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)
[md]### 【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
[/md]

作者: 深开鸿_王石 时间: 2024-9-18 16:53
看看 selinux 和应用权限（是不是系统应用）

作者: kuaile 时间: 2024-9-26 15:54
只有root可以使用tcpdump

作者: yuhaoooooooo 时间: 2024-9-30 15:54
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？

作者: yuhaoooooooo 时间: 2024-9-30 15:55
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

作者: 深开鸿_王石 时间: 2024-10-8 17:55
回复 yuhaoooooooo: 系统应用啊，或者自己改对应的权限：）

作者: 深开鸿_王石 时间: 2024-10-14 09:26
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

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