int load_libpcap(void)
{
char *error;
char *file[] = {"libpcap.so", "libpcap.so.1", "libpcap.so.1.0", "libpcap.so.0.9", "libpcap.so.0.8"};
int i, count = 5;
for (i=0; i<count && !libpcap; i++)
{
libpcap = dlopen(file[i], RTLD_LAZY);
error = dlerror();
}
if (libpcap == NULL)
{
printf("!! 打开libpcap失败，请检查是否已安装该库文件。\n");
return -1;
}
if ((pcap_findalldevs = dlsym(libpcap, "pcap_findalldevs"), error = dlerror()) != NULL
|| (pcap_freealldevs = dlsym(libpcap, "pcap_freealldevs"), error = dlerror()) != NULL
|| (pcap_open_live = dlsym(libpcap, "pcap_open_live"), error = dlerror()) != NULL
|| (pcap_compile = dlsym(libpcap, "pcap_compile"), error = dlerror()) != NULL
|| (pcap_setfilter = dlsym(libpcap, "pcap_setfilter"), error = dlerror()) != NULL
|| (pcap_geterr = dlsym(libpcap, "pcap_geterr"), error = dlerror()) != NULL
|| (pcap_freecode = dlsym(libpcap, "pcap_freecode"), error = dlerror()) != NULL
|| (pcap_loop = dlsym(libpcap, "pcap_loop"), error = dlerror()) != NULL
|| (pcap_close = dlsym(libpcap, "pcap_close"), error = dlerror()) != NULL
|| (pcap_breakloop = dlsym(libpcap, "pcap_breakloop"), error = dlerror()) != NULL
|| (pcap_sendpacket = dlsym(libpcap, "pcap_sendpacket"), error = dlerror()) != NULL)
{
printf("!! 从libpcap获取函数失败: %s\n", error);
free_libpcap();
return -1;
}
return 0;
}
static void exit_handle(void)
{
if (state != ID_DISCONNECT)
switchState(ID_DISCONNECT);
if (hPcap != NULL)
pcap_close(hPcap);
if (fillBuf != NULL)
free(fillBuf);
if (lockfd > -1)
close(lockfd);
#ifndef NO_NOTIFY
free_libnotify();
#endif
#ifndef NO_DYLOAD
free_libpcap();
#endif
printf(">! 认证已退出。\n");
fflush(stdout);
}
