"
AC_CHECK_HEADERS(
[net/if.h netinet/ip.h netinet/if_ether.h resolv.h sys/un.h net/if_utun.h sys/kern_control.h],
[net/if.h netinet/ip.h resolv.h sys/un.h net/if_utun.h sys/kern_control.h],
,
[[${SOCKET_INCLUDES}]]
#ifdef TARGET_LINUX
#if defined(HAVE_NETINET_IF_ETHER_H)
#include <netinet/if_ether.h>
#endif
#ifdef HAVE_LINUX_IF_TUN_H
#include <linux/if_tun.h>
pi.flags = 0;
if(iph->version == 6)
pi.proto = htons(ETH_P_IPV6);
pi.proto = htons(OPENVPN_ETH_P_IPV6);
else
pi.proto = htons(ETH_P_IP);
pi.proto = htons(OPENVPN_ETH_P_IPV4);
vect[0].iov_len = sizeof(pi);
vect[0].iov_base = π