c - dereferencing pointer to incomplete type for pcap_t structure -

i coding in c , using libpcap library. want see fields of pcap_t structure, have error :

error: dereferencing pointer incomplete type 

minimal code following :

#include<stdio.h> #include<pcap/pcap.h>  int main() {   char errbuf[pcap_errbuf_size];   pcap_t *handle;   handle=pcap_open_live("eth0", 65535, 1, 1, errbuf);    printf("handle%d\n", handle->fd);    pcap_close(handle); } 

compilation done :

gcc test.c -lpcap 

according http://www.opensource.apple.com/source/libpcap/libpcap-9/libpcap/pcap-int.h, pcap_t structure have field. libpcap included, not understand @ all.

thanks !

conclusion : olaf seems right : have error because not able access pcap_t structure. antti haapala said, pcap_t struct not defined in pcap/pcap.h in file.

i did manage wanted anyway, without access fields of structure.

problem solved, !

the -int in pcap-int.h stands internal. you're not including header in code.

notice pcap.h not include header, neither contain full declaration of struct pcap; instead using forward declaration in typedef:

typedef struct pcap pcap_t; 

just try:

#include <stdio.h> #include <pcap/pcap-int.h> #include <pcap/pcap.h>  int main() {     char errbuf[pcap_errbuf_size];     pcap_t *handle;     handle=pcap_open_live("eth0", 65535, 1, 1, errbuf);      printf("handle%d\n", handle->fd);      pcap_close(handle); } 

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alas seems internal header not installed in linux nor on mac. extra-ugly hack can try copying pcap-int.h link.