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/*
* IPv6 BSD socket options interface
* Linux INET6 implementation
*
* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
*
* Based on linux/net/ipv4/ip_sockglue.c
*
* $Id: ipv6_sockglue.c,v 1.19 1998/04/30 16:24:26 freitag Exp $
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* FIXME: Make the setsockopt code POSIX compliant: That is
*
* o Return -EINVAL for setsockopt of short lengths
* o Truncate getsockopt returns
* o Return an optlen of the truncated length if need be
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/sched.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <net/sock.h>
#include <net/snmp.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
#include <net/protocol.h>
#include <net/transp_v6.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/inet_common.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <asm/uaccess.h>
struct ipv6_mib ipv6_statistics={0, };
struct packet_type ipv6_packet_type =
{
__constant_htons(ETH_P_IPV6),
NULL, /* All devices */
ipv6_rcv,
NULL,
NULL
};
/*
* addrconf module should be notifyed of a device going up
*/
static struct notifier_block ipv6_dev_notf = {
addrconf_notify,
NULL,
0
};
int ipv6_setsockopt(struct sock *sk, int level, int optname, char *optval,
int optlen)
{
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
int val, err;
int retv = -ENOPROTOOPT;
if(level!=SOL_IPV6)
goto out;
if (optval == NULL) {
val=0;
} else {
err = get_user(val, (int *) optval);
if(err)
return err;
}
switch (optname) {
case IPV6_ADDRFORM:
if (val == PF_INET) {
if (sk->protocol != IPPROTO_UDP &&
sk->protocol != IPPROTO_TCP)
goto out;
if (sk->state != TCP_ESTABLISHED) {
retv = ENOTCONN;
goto out;
}
if (!(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
retv = -EADDRNOTAVAIL;
goto out;
}
if (sk->protocol == IPPROTO_TCP) {
struct tcp_opt *tp = &(sk->tp_pinfo.af_tcp);
sk->prot = &tcp_prot;
tp->af_specific = &ipv4_specific;
sk->socket->ops = &inet_stream_ops;
sk->family = AF_INET;
} else {
sk->prot = &udp_prot;
sk->socket->ops = &inet_dgram_ops;
}
retv = 0;
} else {
retv = -EINVAL;
}
break;
case IPV6_PKTINFO:
np->rxinfo = val;
retv = 0;
break;
case IPV6_HOPLIMIT:
np->rxhlim = val;
retv = 0;
break;
case IPV6_UNICAST_HOPS:
if (val > 255 || val < -1)
retv = -EINVAL;
else {
np->hop_limit = val;
retv = 0;
}
break;
case IPV6_MULTICAST_HOPS:
if (val > 255 || val < -1)
retv = -EINVAL;
else {
np->mcast_hops = val;
retv = 0;
}
break;
break;
case IPV6_MULTICAST_LOOP:
np->mc_loop = (val != 0);
retv = 0;
break;
case IPV6_MULTICAST_IF:
{
int oif = 0;
struct in6_addr addr;
if (copy_from_user(&addr, optval, sizeof(struct in6_addr)))
return -EFAULT;
if (!ipv6_addr_any(&addr)) {
struct inet6_ifaddr *ifp;
ifp = ipv6_chk_addr(&addr, NULL, 0);
if (ifp == NULL) {
retv = -EADDRNOTAVAIL;
break;
}
oif = ifp->idev->dev->ifindex;
}
if (sk->bound_dev_if && sk->bound_dev_if != oif) {
retv = -EINVAL;
break;
}
np->mcast_oif = oif;
retv = 0;
break;
}
case IPV6_ADD_MEMBERSHIP:
case IPV6_DROP_MEMBERSHIP:
{
struct ipv6_mreq mreq;
int err;
err = copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq));
if(err)
return -EFAULT;
if (optname == IPV6_ADD_MEMBERSHIP)
retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
else
retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
}
};
out:
return retv;
}
int ipv6_getsockopt(struct sock *sk, int level, int optname, char *optval,
int *optlen)
{
return 0;
}
#if defined(MODULE) && defined(CONFIG_SYSCTL)
/*
* sysctl registration functions defined in sysctl_net_ipv6.c
*/
extern void ipv6_sysctl_register(void);
extern void ipv6_sysctl_unregister(void);
#endif
__initfunc(void ipv6_init(void))
{
dev_add_pack(&ipv6_packet_type);
#if defined(MODULE) && defined(CONFIG_SYSCTL)
ipv6_sysctl_register();
#endif
register_netdevice_notifier(&ipv6_dev_notf);
ip6_route_init();
}
#ifdef MODULE
void ipv6_cleanup(void)
{
unregister_netdevice_notifier(&ipv6_dev_notf);
dev_remove_pack(&ipv6_packet_type);
#ifdef CONFIG_SYSCTL
ipv6_sysctl_unregister();
#endif
ip6_route_cleanup();
icmpv6_cleanup();
addrconf_cleanup();
}
#endif
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