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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* create raw socket for icmp (IPv6 version) protocol test permission
* and drop root privileges if running setuid
*
*/
#include <sys/types.h>
#include <netdb.h>
#include <sys/socket.h>
#include <errno.h>
#include <unistd.h>
#include "libbb.h"
#ifdef CONFIG_FEATURE_IPV6
int create_icmp6_socket(void)
{
struct protoent *proto;
int sock;
proto = getprotobyname("ipv6-icmp");
/* if getprotobyname failed, just silently force
* proto->p_proto to have the correct value for "ipv6-icmp" */
if ((sock = socket(AF_INET6, SOCK_RAW,
(proto ? proto->p_proto : IPPROTO_ICMPV6))) < 0) {
if (errno == EPERM)
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
else
bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
}
/* drop root privs if running setuid */
setuid(getuid());
return sock;
}
#endif
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