【IT专家】如何使用pcap结构与良好的包括

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如何使用pcap结构与良好的包括

如何使用pcap结构与良好的包括[英]How to use pcap structures with the good includes Since yesterday i’m learning how to use pcap to parse a pcap file.

 从昨天开始，我正在学习如何使用pcap来解析pcap文件。

And since yesterday i’m getting an error :

 从昨天开始我收到一个错误：

Here is my simple code, trying to write the fd in pcap_t structure:

 这是我的简单代码，尝试在pcap_t结构中编写fd：

 #include pcap/pcap.h #include sys/types.h #include pcap-bpf.h #include stdio.h int main() { char errbuf[PCAP_ERRBUF_SIZE]; pcap_t *result; if ((result = pcap_open_offline(“test.pcap”, errbuf)) == NULL) { printf(“%s\n”, errbuf); return -1; printf(“fd=%d\n”, result- return 0; and here is my error:

 这是我的错误：

 gcc -Wextra -Wall -Werror -I./includes -c -o main.o main.cmain.c: In function ‘main’:main.c:14:27: error: dereferencing pointer to incomplete type printf(“fd=%d\n”, result- make: *** [main.o] Error 1 I saw this post: Pcap Incomplete Type

 我看到这篇文章：Pcap Incomplete Type

 Where the guy is having almost the same problem as I have, but still, I can’t find a solution, I included what pcap_open_offline needs, I also included pcap-bpf.h because I saw that pcap_t is using bpf_program.

 那个家伙遇到的问题几乎和我一样，但是，我找不到解决办法，我包含了

pcap_open_offline需要的东西，我还包括pcap-bpf.h，因为我看到pcap_t正在使用bpf_program。

The first answer is saying “The error is because the compiler cannot see the definition of the structure” but in my case the structure is pcap_t and is typedef in pcap.h, which i included.