static int
linux_socket(struct linux_socket_args *args, int *res)
{
struct linux_socket_args linux_args;
struct sockopt sopt;
int error, domain, optval;
error = copyin(args, &linux_args, sizeof(linux_args));
if (error)
return (error);
domain = linux_to_bsd_domain(linux_args.domain);
if (domain == -1)
return (EINVAL);
error = kern_socket(domain, linux_args.type, linux_args.protocol, res);
/* Copy back the return value from socket() */
if (error == 0 && linux_args.type == SOCK_RAW &&
(linux_args.protocol == IPPROTO_RAW || linux_args.protocol == 0) &&
linux_args.domain == AF_INET) {
/* It's a raw IP socket: set the IP_HDRINCL option. */
optval = 1;
sopt.sopt_dir = SOPT_SET;
sopt.sopt_level = IPPROTO_IP;
sopt.sopt_name = IP_HDRINCL;
sopt.sopt_val = &optval;
sopt.sopt_valsize = sizeof(optval);
sopt.sopt_td = NULL;
/* We ignore any error returned by setsockopt() */
kern_setsockopt(*res, &sopt);
}
return (error);
}
static int
linux_socket(struct thread *td, struct linux_socket_args *args)
{
struct socket_args /* {
int domain;
int type;
int protocol;
} */ bsd_args;
int retval_socket, socket_flags;
bsd_args.protocol = args->protocol;
socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
return (EINVAL);
bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
return (EINVAL);
bsd_args.domain = linux_to_bsd_domain(args->domain);
if (bsd_args.domain == -1)
return (EAFNOSUPPORT);
retval_socket = socket(td, &bsd_args);
if (retval_socket)
return (retval_socket);
retval_socket = linux_set_socket_flags(td, td->td_retval[0],
socket_flags);
if (retval_socket) {
(void)kern_close(td, td->td_retval[0]);
goto out;
}
if (bsd_args.type == SOCK_RAW
&& (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
&& bsd_args.domain == PF_INET) {
/* It's a raw IP socket: set the IP_HDRINCL option. */
int hdrincl;
hdrincl = 1;
/* We ignore any error returned by kern_setsockopt() */
kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
&hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
}
#ifdef INET6
/*
* Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default
* and some apps depend on this. So, set V6ONLY to 0 for Linux apps.
* For simplicity we do this unconditionally of the net.inet6.ip6.v6only
* sysctl value.
*/
if (bsd_args.domain == PF_INET6) {
int v6only;
v6only = 0;
/* We ignore any error returned by setsockopt() */
kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
&v6only, UIO_SYSSPACE, sizeof(v6only));
}
#endif
out:
return (retval_socket);
}