macos 如何在 linux/Mac OSX 中获取网络适配器统计信息？
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How to get network adapter stats in linux/Mac OSX?
提问by Stefan
I'm looking for a way to get hold of network stats in C on Linux and MacOSX. Specifically, I need to monitor the number of bytes uploaded and downloaded from each network adapter on the system - I don't need to do packet inspection, or differentiate between protocols, just a 'total bytes' counter which I can poll at intervals would be fine. In Windows I can do this using the iphlpapi.dll library via GetIfTable (to list the network adapters) and GetIfEntry (to read the stats), but I can't find the Linux/OSX equivalents. My knowledge of C is fairly basic so I would appreciate a solution that isn't too involved. Any help would be much appreciated!
我正在寻找一种在 Linux 和 MacOSX 上使用 C 语言获取网络统计信息的方法。具体来说，我需要监控从系统上的每个网络适配器上传和下载的字节数 - 我不需要进行数据包检查或区分协议，只需一个“总字节数”计数器，我可以每隔一段时间轮询一次没事的。在 Windows 中，我可以通过 GetIfTable（列出网络适配器）和 GetIfEntry（读取统计信息）使用 iphlpapi.dll 库来执行此操作，但我找不到 Linux/OSX 等效项。我对 C 的了解是相当基础的，所以我希望有一个不太复杂的解决方案。任何帮助将非常感激！
回答by Stefan
The Darwin netstat source code uses sysctl. Here's some code that prints the number of bytes in and out on OSX:
Darwin netstat 源代码使用 sysctl。下面是一些在 OSX 上打印进出字节数的代码：
#import <Foundation/Foundation.h>
#include <sys/sysctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <net/route.h>
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
int mib[] = {
CTL_NET,
PF_ROUTE,
0,
0,
NET_RT_IFLIST2,
0
};
size_t len;
if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
fprintf(stderr, "sysctl: %s\n", strerror(errno));
exit(1);
}
char *buf = (char *)malloc(len);
if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
fprintf(stderr, "sysctl: %s\n", strerror(errno));
exit(1);
}
char *lim = buf + len;
char *next = NULL;
u_int64_t totalibytes = 0;
u_int64_t totalobytes = 0;
for (next = buf; next < lim; ) {
struct if_msghdr *ifm = (struct if_msghdr *)next;
next += ifm->ifm_msglen;
if (ifm->ifm_type == RTM_IFINFO2) {
struct if_msghdr2 *if2m = (struct if_msghdr2 *)ifm;
totalibytes += if2m->ifm_data.ifi_ibytes;
totalobytes += if2m->ifm_data.ifi_obytes;
}
}
printf("total ibytes %qu\tobytes %qu\n", totalibytes, totalobytes);
[pool drain];
return 0;
}
回答by Javier
回答by Duck
I can't speak to OSX but on linux take a look at /proc/net/dev.
我无法与 OSX 交谈，但在 linux 上查看 /proc/net/dev。
If you do 'cat /proc/net/dev' you should see statistics including 'bytes' - the total number of bytes of data transmitted or received by the interface. You can read the file within your own program.
如果您执行“cat /proc/net/dev”，您应该会看到包括“字节”在内的统计信息——接口传输或接收的数据总字节数。您可以在自己的程序中读取该文件。
EDIT:
编辑：
I didn't read your whole question. This articleshould help you get started with /proc and has a section on /proc/net/dev.
我没有阅读你的整个问题。 这篇文章应该可以帮助您开始使用 /proc 并且有一个关于 /proc/net/dev 的部分。
Also, to list the interfaces you can call ioctlwith the SIOCGIFCONFoption. You can Google for a decent code example on how to loop through the returned data. Or you can simply pull it out of the /proc.net/dev data mentioned above, which should be easier.
此外，要列出接口，您可以使用SIOCGIFCONF选项调用ioctl。您可以在 Google 上搜索有关如何遍历返回数据的体面代码示例。或者你可以简单地从上面提到的/proc.net/dev 数据中提取它，这样应该更容易。
