2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* common UDP/RAW code
|
|
|
|
* Linux INET6 implementation
|
|
|
|
*
|
|
|
|
* Authors:
|
|
|
|
* Pedro Roque <roque@di.fc.ul.pt>
|
|
|
|
*
|
|
|
|
* $Id: datagram.c,v 1.24 2002/02/01 22:01:04 davem 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/socket.h>
|
|
|
|
#include <linux/sockios.h>
|
|
|
|
#include <linux/in6.h>
|
|
|
|
#include <linux/ipv6.h>
|
|
|
|
#include <linux/route.h>
|
|
|
|
|
|
|
|
#include <net/ipv6.h>
|
|
|
|
#include <net/ndisc.h>
|
|
|
|
#include <net/addrconf.h>
|
|
|
|
#include <net/transp_v6.h>
|
|
|
|
#include <net/ip6_route.h>
|
2005-08-09 21:08:28 -06:00
|
|
|
#include <net/tcp_states.h>
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#include <linux/errqueue.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
|
|
|
|
|
|
int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
|
|
|
|
{
|
|
|
|
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
|
|
|
|
struct inet_sock *inet = inet_sk(sk);
|
|
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
struct in6_addr *daddr, *final_p = NULL, final;
|
|
|
|
struct dst_entry *dst;
|
|
|
|
struct flowi fl;
|
|
|
|
struct ip6_flowlabel *flowlabel = NULL;
|
|
|
|
int addr_type;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (usin->sin6_family == AF_INET) {
|
|
|
|
if (__ipv6_only_sock(sk))
|
|
|
|
return -EAFNOSUPPORT;
|
|
|
|
err = ip4_datagram_connect(sk, uaddr, addr_len);
|
|
|
|
goto ipv4_connected;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (addr_len < SIN6_LEN_RFC2133)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (usin->sin6_family != AF_INET6)
|
|
|
|
return -EAFNOSUPPORT;
|
|
|
|
|
|
|
|
memset(&fl, 0, sizeof(fl));
|
|
|
|
if (np->sndflow) {
|
|
|
|
fl.fl6_flowlabel = usin->sin6_flowinfo&IPV6_FLOWINFO_MASK;
|
|
|
|
if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
|
|
|
|
flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
|
|
|
|
if (flowlabel == NULL)
|
|
|
|
return -EINVAL;
|
|
|
|
ipv6_addr_copy(&usin->sin6_addr, &flowlabel->dst);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
addr_type = ipv6_addr_type(&usin->sin6_addr);
|
|
|
|
|
|
|
|
if (addr_type == IPV6_ADDR_ANY) {
|
|
|
|
/*
|
|
|
|
* connect to self
|
|
|
|
*/
|
|
|
|
usin->sin6_addr.s6_addr[15] = 0x01;
|
|
|
|
}
|
|
|
|
|
|
|
|
daddr = &usin->sin6_addr;
|
|
|
|
|
|
|
|
if (addr_type == IPV6_ADDR_MAPPED) {
|
|
|
|
struct sockaddr_in sin;
|
|
|
|
|
|
|
|
if (__ipv6_only_sock(sk)) {
|
|
|
|
err = -ENETUNREACH;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
sin.sin_family = AF_INET;
|
|
|
|
sin.sin_addr.s_addr = daddr->s6_addr32[3];
|
|
|
|
sin.sin_port = usin->sin6_port;
|
|
|
|
|
|
|
|
err = ip4_datagram_connect(sk,
|
|
|
|
(struct sockaddr*) &sin,
|
|
|
|
sizeof(sin));
|
|
|
|
|
|
|
|
ipv4_connected:
|
|
|
|
if (err)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
ipv6_addr_set(&np->daddr, 0, 0, htonl(0x0000ffff), inet->daddr);
|
|
|
|
|
|
|
|
if (ipv6_addr_any(&np->saddr)) {
|
|
|
|
ipv6_addr_set(&np->saddr, 0, 0, htonl(0x0000ffff),
|
|
|
|
inet->saddr);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ipv6_addr_any(&np->rcv_saddr)) {
|
|
|
|
ipv6_addr_set(&np->rcv_saddr, 0, 0, htonl(0x0000ffff),
|
|
|
|
inet->rcv_saddr);
|
|
|
|
}
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (addr_type&IPV6_ADDR_LINKLOCAL) {
|
|
|
|
if (addr_len >= sizeof(struct sockaddr_in6) &&
|
|
|
|
usin->sin6_scope_id) {
|
|
|
|
if (sk->sk_bound_dev_if &&
|
|
|
|
sk->sk_bound_dev_if != usin->sin6_scope_id) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
sk->sk_bound_dev_if = usin->sin6_scope_id;
|
|
|
|
if (!sk->sk_bound_dev_if &&
|
|
|
|
(addr_type & IPV6_ADDR_MULTICAST))
|
|
|
|
fl.oif = np->mcast_oif;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Connect to link-local address requires an interface */
|
|
|
|
if (!sk->sk_bound_dev_if) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
ipv6_addr_copy(&np->daddr, daddr);
|
|
|
|
np->flow_label = fl.fl6_flowlabel;
|
|
|
|
|
|
|
|
inet->dport = usin->sin6_port;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check for a route to destination an obtain the
|
|
|
|
* destination cache for it.
|
|
|
|
*/
|
|
|
|
|
|
|
|
fl.proto = sk->sk_protocol;
|
|
|
|
ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
|
|
|
|
ipv6_addr_copy(&fl.fl6_src, &np->saddr);
|
|
|
|
fl.oif = sk->sk_bound_dev_if;
|
|
|
|
fl.fl_ip_dport = inet->dport;
|
|
|
|
fl.fl_ip_sport = inet->sport;
|
|
|
|
|
|
|
|
if (!fl.oif && (addr_type&IPV6_ADDR_MULTICAST))
|
|
|
|
fl.oif = np->mcast_oif;
|
|
|
|
|
|
|
|
if (flowlabel) {
|
|
|
|
if (flowlabel->opt && flowlabel->opt->srcrt) {
|
|
|
|
struct rt0_hdr *rt0 = (struct rt0_hdr *) flowlabel->opt->srcrt;
|
|
|
|
ipv6_addr_copy(&final, &fl.fl6_dst);
|
|
|
|
ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
|
|
|
|
final_p = &final;
|
|
|
|
}
|
|
|
|
} else if (np->opt && np->opt->srcrt) {
|
|
|
|
struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
|
|
|
|
ipv6_addr_copy(&final, &fl.fl6_dst);
|
|
|
|
ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
|
|
|
|
final_p = &final;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = ip6_dst_lookup(sk, &dst, &fl);
|
|
|
|
if (err)
|
|
|
|
goto out;
|
|
|
|
if (final_p)
|
|
|
|
ipv6_addr_copy(&fl.fl6_dst, final_p);
|
|
|
|
|
2005-09-08 16:11:55 -06:00
|
|
|
if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
|
2005-04-16 16:20:36 -06:00
|
|
|
goto out;
|
|
|
|
|
|
|
|
/* source address lookup done in ip6_dst_lookup */
|
|
|
|
|
|
|
|
if (ipv6_addr_any(&np->saddr))
|
|
|
|
ipv6_addr_copy(&np->saddr, &fl.fl6_src);
|
|
|
|
|
|
|
|
if (ipv6_addr_any(&np->rcv_saddr)) {
|
|
|
|
ipv6_addr_copy(&np->rcv_saddr, &fl.fl6_src);
|
|
|
|
inet->rcv_saddr = LOOPBACK4_IPV6;
|
|
|
|
}
|
|
|
|
|
|
|
|
ip6_dst_store(sk, dst,
|
|
|
|
ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
|
|
|
|
&np->daddr : NULL);
|
|
|
|
|
|
|
|
sk->sk_state = TCP_ESTABLISHED;
|
|
|
|
out:
|
|
|
|
fl6_sock_release(flowlabel);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
|
|
|
|
u16 port, u32 info, u8 *payload)
|
|
|
|
{
|
|
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
struct icmp6hdr *icmph = (struct icmp6hdr *)skb->h.raw;
|
|
|
|
struct sock_exterr_skb *serr;
|
|
|
|
|
|
|
|
if (!np->recverr)
|
|
|
|
return;
|
|
|
|
|
|
|
|
skb = skb_clone(skb, GFP_ATOMIC);
|
|
|
|
if (!skb)
|
|
|
|
return;
|
|
|
|
|
|
|
|
serr = SKB_EXT_ERR(skb);
|
|
|
|
serr->ee.ee_errno = err;
|
|
|
|
serr->ee.ee_origin = SO_EE_ORIGIN_ICMP6;
|
|
|
|
serr->ee.ee_type = icmph->icmp6_type;
|
|
|
|
serr->ee.ee_code = icmph->icmp6_code;
|
|
|
|
serr->ee.ee_pad = 0;
|
|
|
|
serr->ee.ee_info = info;
|
|
|
|
serr->ee.ee_data = 0;
|
|
|
|
serr->addr_offset = (u8*)&(((struct ipv6hdr*)(icmph+1))->daddr) - skb->nh.raw;
|
|
|
|
serr->port = port;
|
|
|
|
|
|
|
|
skb->h.raw = payload;
|
|
|
|
__skb_pull(skb, payload - skb->data);
|
|
|
|
|
|
|
|
if (sock_queue_err_skb(sk, skb))
|
|
|
|
kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info)
|
|
|
|
{
|
|
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
struct sock_exterr_skb *serr;
|
|
|
|
struct ipv6hdr *iph;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
|
|
|
if (!np->recverr)
|
|
|
|
return;
|
|
|
|
|
|
|
|
skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC);
|
|
|
|
if (!skb)
|
|
|
|
return;
|
|
|
|
|
|
|
|
iph = (struct ipv6hdr*)skb_put(skb, sizeof(struct ipv6hdr));
|
|
|
|
skb->nh.ipv6h = iph;
|
|
|
|
ipv6_addr_copy(&iph->daddr, &fl->fl6_dst);
|
|
|
|
|
|
|
|
serr = SKB_EXT_ERR(skb);
|
|
|
|
serr->ee.ee_errno = err;
|
|
|
|
serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL;
|
|
|
|
serr->ee.ee_type = 0;
|
|
|
|
serr->ee.ee_code = 0;
|
|
|
|
serr->ee.ee_pad = 0;
|
|
|
|
serr->ee.ee_info = info;
|
|
|
|
serr->ee.ee_data = 0;
|
|
|
|
serr->addr_offset = (u8*)&iph->daddr - skb->nh.raw;
|
|
|
|
serr->port = fl->fl_ip_dport;
|
|
|
|
|
|
|
|
skb->h.raw = skb->tail;
|
|
|
|
__skb_pull(skb, skb->tail - skb->data);
|
|
|
|
|
|
|
|
if (sock_queue_err_skb(sk, skb))
|
|
|
|
kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Handle MSG_ERRQUEUE
|
|
|
|
*/
|
|
|
|
int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
|
|
|
|
{
|
|
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
struct sock_exterr_skb *serr;
|
|
|
|
struct sk_buff *skb, *skb2;
|
|
|
|
struct sockaddr_in6 *sin;
|
|
|
|
struct {
|
|
|
|
struct sock_extended_err ee;
|
|
|
|
struct sockaddr_in6 offender;
|
|
|
|
} errhdr;
|
|
|
|
int err;
|
|
|
|
int copied;
|
|
|
|
|
|
|
|
err = -EAGAIN;
|
|
|
|
skb = skb_dequeue(&sk->sk_error_queue);
|
|
|
|
if (skb == NULL)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
copied = skb->len;
|
|
|
|
if (copied > len) {
|
|
|
|
msg->msg_flags |= MSG_TRUNC;
|
|
|
|
copied = len;
|
|
|
|
}
|
|
|
|
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
|
|
|
|
if (err)
|
|
|
|
goto out_free_skb;
|
|
|
|
|
|
|
|
sock_recv_timestamp(msg, sk, skb);
|
|
|
|
|
|
|
|
serr = SKB_EXT_ERR(skb);
|
|
|
|
|
|
|
|
sin = (struct sockaddr_in6 *)msg->msg_name;
|
|
|
|
if (sin) {
|
|
|
|
sin->sin6_family = AF_INET6;
|
|
|
|
sin->sin6_flowinfo = 0;
|
|
|
|
sin->sin6_port = serr->port;
|
|
|
|
sin->sin6_scope_id = 0;
|
|
|
|
if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6) {
|
|
|
|
ipv6_addr_copy(&sin->sin6_addr,
|
|
|
|
(struct in6_addr *)(skb->nh.raw + serr->addr_offset));
|
|
|
|
if (np->sndflow)
|
|
|
|
sin->sin6_flowinfo = *(u32*)(skb->nh.raw + serr->addr_offset - 24) & IPV6_FLOWINFO_MASK;
|
|
|
|
if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
|
|
|
|
sin->sin6_scope_id = IP6CB(skb)->iif;
|
|
|
|
} else {
|
|
|
|
ipv6_addr_set(&sin->sin6_addr, 0, 0,
|
|
|
|
htonl(0xffff),
|
|
|
|
*(u32*)(skb->nh.raw + serr->addr_offset));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
|
|
|
|
sin = &errhdr.offender;
|
|
|
|
sin->sin6_family = AF_UNSPEC;
|
|
|
|
if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL) {
|
|
|
|
sin->sin6_family = AF_INET6;
|
|
|
|
sin->sin6_flowinfo = 0;
|
|
|
|
sin->sin6_scope_id = 0;
|
|
|
|
if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6) {
|
|
|
|
ipv6_addr_copy(&sin->sin6_addr, &skb->nh.ipv6h->saddr);
|
|
|
|
if (np->rxopt.all)
|
|
|
|
datagram_recv_ctl(sk, msg, skb);
|
|
|
|
if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
|
|
|
|
sin->sin6_scope_id = IP6CB(skb)->iif;
|
|
|
|
} else {
|
|
|
|
struct inet_sock *inet = inet_sk(sk);
|
|
|
|
|
|
|
|
ipv6_addr_set(&sin->sin6_addr, 0, 0,
|
|
|
|
htonl(0xffff),
|
|
|
|
skb->nh.iph->saddr);
|
|
|
|
if (inet->cmsg_flags)
|
|
|
|
ip_cmsg_recv(msg, skb);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_RECVERR, sizeof(errhdr), &errhdr);
|
|
|
|
|
|
|
|
/* Now we could try to dump offended packet options */
|
|
|
|
|
|
|
|
msg->msg_flags |= MSG_ERRQUEUE;
|
|
|
|
err = copied;
|
|
|
|
|
|
|
|
/* Reset and regenerate socket error */
|
2005-06-18 23:56:18 -06:00
|
|
|
spin_lock_bh(&sk->sk_error_queue.lock);
|
2005-04-16 16:20:36 -06:00
|
|
|
sk->sk_err = 0;
|
|
|
|
if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) {
|
|
|
|
sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno;
|
2005-06-18 23:56:18 -06:00
|
|
|
spin_unlock_bh(&sk->sk_error_queue.lock);
|
2005-04-16 16:20:36 -06:00
|
|
|
sk->sk_error_report(sk);
|
|
|
|
} else {
|
2005-06-18 23:56:18 -06:00
|
|
|
spin_unlock_bh(&sk->sk_error_queue.lock);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
out_free_skb:
|
|
|
|
kfree_skb(skb);
|
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
struct inet6_skb_parm *opt = IP6CB(skb);
|
|
|
|
|
|
|
|
if (np->rxopt.bits.rxinfo) {
|
|
|
|
struct in6_pktinfo src_info;
|
|
|
|
|
|
|
|
src_info.ipi6_ifindex = opt->iif;
|
|
|
|
ipv6_addr_copy(&src_info.ipi6_addr, &skb->nh.ipv6h->daddr);
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (np->rxopt.bits.rxhlim) {
|
|
|
|
int hlim = skb->nh.ipv6h->hop_limit;
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
|
|
|
|
}
|
|
|
|
|
2005-09-07 19:19:03 -06:00
|
|
|
if (np->rxopt.bits.rxtclass) {
|
|
|
|
int tclass = (ntohl(*(u32 *)skb->nh.ipv6h) >> 20) & 0xff;
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);
|
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
if (np->rxopt.bits.rxflow && (*(u32*)skb->nh.raw & IPV6_FLOWINFO_MASK)) {
|
|
|
|
u32 flowinfo = *(u32*)skb->nh.raw & IPV6_FLOWINFO_MASK;
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
|
|
|
|
}
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
|
|
|
|
/* HbH is allowed only once */
|
2005-04-16 16:20:36 -06:00
|
|
|
if (np->rxopt.bits.hopopts && opt->hop) {
|
|
|
|
u8 *ptr = skb->nh.raw + opt->hop;
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_HOPOPTS, (ptr[1]+1)<<3, ptr);
|
|
|
|
}
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
|
|
|
|
if (opt->lastopt &&
|
|
|
|
(np->rxopt.bits.dstopts || np->rxopt.bits.srcrt)) {
|
|
|
|
/*
|
|
|
|
* Silly enough, but we need to reparse in order to
|
|
|
|
* report extension headers (except for HbH)
|
|
|
|
* in order.
|
|
|
|
*
|
|
|
|
* Also note that IPV6_RECVRTHDRDSTOPTS is NOT
|
|
|
|
* (and WILL NOT be) defined because
|
|
|
|
* IPV6_RECVDSTOPTS is more generic. --yoshfuji
|
|
|
|
*/
|
|
|
|
unsigned int off = sizeof(struct ipv6hdr);
|
|
|
|
u8 nexthdr = skb->nh.ipv6h->nexthdr;
|
|
|
|
|
|
|
|
while (off <= opt->lastopt) {
|
|
|
|
unsigned len;
|
|
|
|
u8 *ptr = skb->nh.raw + off;
|
|
|
|
|
|
|
|
switch(nexthdr) {
|
|
|
|
case IPPROTO_DSTOPTS:
|
|
|
|
nexthdr = ptr[0];
|
|
|
|
len = (ptr[1] + 1) << 3;
|
|
|
|
if (np->rxopt.bits.dstopts)
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, len, ptr);
|
|
|
|
break;
|
|
|
|
case IPPROTO_ROUTING:
|
|
|
|
nexthdr = ptr[0];
|
|
|
|
len = (ptr[1] + 1) << 3;
|
|
|
|
if (np->rxopt.bits.srcrt)
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, len, ptr);
|
|
|
|
break;
|
|
|
|
case IPPROTO_AH:
|
|
|
|
nexthdr = ptr[0];
|
2005-11-19 20:21:59 -07:00
|
|
|
len = (ptr[1] + 2) << 2;
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
nexthdr = ptr[0];
|
|
|
|
len = (ptr[1] + 1) << 3;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
off += len;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* socket options in old style */
|
|
|
|
if (np->rxopt.bits.rxoinfo) {
|
|
|
|
struct in6_pktinfo src_info;
|
|
|
|
|
|
|
|
src_info.ipi6_ifindex = opt->iif;
|
|
|
|
ipv6_addr_copy(&src_info.ipi6_addr, &skb->nh.ipv6h->daddr);
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
|
|
|
|
}
|
|
|
|
if (np->rxopt.bits.rxohlim) {
|
|
|
|
int hlim = skb->nh.ipv6h->hop_limit;
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
|
|
|
|
}
|
|
|
|
if (np->rxopt.bits.ohopopts && opt->hop) {
|
|
|
|
u8 *ptr = skb->nh.raw + opt->hop;
|
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_2292HOPOPTS, (ptr[1]+1)<<3, ptr);
|
|
|
|
}
|
|
|
|
if (np->rxopt.bits.odstopts && opt->dst0) {
|
2005-04-16 16:20:36 -06:00
|
|
|
u8 *ptr = skb->nh.raw + opt->dst0;
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
if (np->rxopt.bits.osrcrt && opt->srcrt) {
|
2005-04-16 16:20:36 -06:00
|
|
|
struct ipv6_rt_hdr *rthdr = (struct ipv6_rt_hdr *)(skb->nh.raw + opt->srcrt);
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_2292RTHDR, (rthdr->hdrlen+1) << 3, rthdr);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
if (np->rxopt.bits.odstopts && opt->dst1) {
|
2005-04-16 16:20:36 -06:00
|
|
|
u8 *ptr = skb->nh.raw + opt->dst1;
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
|
|
|
|
struct ipv6_txoptions *opt,
|
2005-09-07 19:19:03 -06:00
|
|
|
int *hlimit, int *tclass)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct in6_pktinfo *src_info;
|
|
|
|
struct cmsghdr *cmsg;
|
|
|
|
struct ipv6_rt_hdr *rthdr;
|
|
|
|
struct ipv6_opt_hdr *hdr;
|
|
|
|
int len;
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
|
|
|
|
int addr_type;
|
|
|
|
struct net_device *dev = NULL;
|
|
|
|
|
|
|
|
if (!CMSG_OK(msg, cmsg)) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cmsg->cmsg_level != SOL_IPV6)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
switch (cmsg->cmsg_type) {
|
|
|
|
case IPV6_PKTINFO:
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
case IPV6_2292PKTINFO:
|
2005-04-16 16:20:36 -06:00
|
|
|
if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct in6_pktinfo))) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
src_info = (struct in6_pktinfo *)CMSG_DATA(cmsg);
|
|
|
|
|
|
|
|
if (src_info->ipi6_ifindex) {
|
|
|
|
if (fl->oif && src_info->ipi6_ifindex != fl->oif)
|
|
|
|
return -EINVAL;
|
|
|
|
fl->oif = src_info->ipi6_ifindex;
|
|
|
|
}
|
|
|
|
|
|
|
|
addr_type = ipv6_addr_type(&src_info->ipi6_addr);
|
|
|
|
|
|
|
|
if (addr_type == IPV6_ADDR_ANY)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (addr_type & IPV6_ADDR_LINKLOCAL) {
|
|
|
|
if (!src_info->ipi6_ifindex)
|
|
|
|
return -EINVAL;
|
|
|
|
else {
|
|
|
|
dev = dev_get_by_index(src_info->ipi6_ifindex);
|
|
|
|
if (!dev)
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!ipv6_chk_addr(&src_info->ipi6_addr, dev, 0)) {
|
|
|
|
if (dev)
|
|
|
|
dev_put(dev);
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
if (dev)
|
|
|
|
dev_put(dev);
|
|
|
|
|
|
|
|
ipv6_addr_copy(&fl->fl6_src, &src_info->ipi6_addr);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IPV6_FLOWINFO:
|
|
|
|
if (cmsg->cmsg_len < CMSG_LEN(4)) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (fl->fl6_flowlabel&IPV6_FLOWINFO_MASK) {
|
|
|
|
if ((fl->fl6_flowlabel^*(u32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
fl->fl6_flowlabel = IPV6_FLOWINFO_MASK & *(u32 *)CMSG_DATA(cmsg);
|
|
|
|
break;
|
|
|
|
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
case IPV6_2292HOPOPTS:
|
2005-04-16 16:20:36 -06:00
|
|
|
case IPV6_HOPOPTS:
|
|
|
|
if (opt->hopopt || cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg);
|
|
|
|
len = ((hdr->hdrlen + 1) << 3);
|
|
|
|
if (cmsg->cmsg_len < CMSG_LEN(len)) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
if (!capable(CAP_NET_RAW)) {
|
|
|
|
err = -EPERM;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
opt->opt_nflen += len;
|
|
|
|
opt->hopopt = hdr;
|
|
|
|
break;
|
|
|
|
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
case IPV6_2292DSTOPTS:
|
2005-04-16 16:20:36 -06:00
|
|
|
if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg);
|
|
|
|
len = ((hdr->hdrlen + 1) << 3);
|
|
|
|
if (cmsg->cmsg_len < CMSG_LEN(len)) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
if (!capable(CAP_NET_RAW)) {
|
|
|
|
err = -EPERM;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
if (opt->dst1opt) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
opt->opt_flen += len;
|
|
|
|
opt->dst1opt = hdr;
|
|
|
|
break;
|
|
|
|
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
case IPV6_DSTOPTS:
|
|
|
|
case IPV6_RTHDRDSTOPTS:
|
|
|
|
if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg);
|
|
|
|
len = ((hdr->hdrlen + 1) << 3);
|
|
|
|
if (cmsg->cmsg_len < CMSG_LEN(len)) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
if (!capable(CAP_NET_RAW)) {
|
|
|
|
err = -EPERM;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
if (cmsg->cmsg_type == IPV6_DSTOPTS) {
|
|
|
|
opt->opt_flen += len;
|
|
|
|
opt->dst1opt = hdr;
|
|
|
|
} else {
|
|
|
|
opt->opt_nflen += len;
|
|
|
|
opt->dst0opt = hdr;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IPV6_2292RTHDR:
|
2005-04-16 16:20:36 -06:00
|
|
|
case IPV6_RTHDR:
|
|
|
|
if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_rt_hdr))) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
rthdr = (struct ipv6_rt_hdr *)CMSG_DATA(cmsg);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* TYPE 0
|
|
|
|
*/
|
|
|
|
if (rthdr->type) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
len = ((rthdr->hdrlen + 1) << 3);
|
|
|
|
|
|
|
|
if (cmsg->cmsg_len < CMSG_LEN(len)) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* segments left must also match */
|
|
|
|
if ((rthdr->hdrlen >> 1) != rthdr->segments_left) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
opt->opt_nflen += len;
|
|
|
|
opt->srcrt = rthdr;
|
|
|
|
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
if (cmsg->cmsg_type == IPV6_2292RTHDR && opt->dst1opt) {
|
2005-04-16 16:20:36 -06:00
|
|
|
int dsthdrlen = ((opt->dst1opt->hdrlen+1)<<3);
|
|
|
|
|
|
|
|
opt->opt_nflen += dsthdrlen;
|
|
|
|
opt->dst0opt = opt->dst1opt;
|
|
|
|
opt->dst1opt = NULL;
|
|
|
|
opt->opt_flen -= dsthdrlen;
|
|
|
|
}
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-07 18:59:17 -06:00
|
|
|
case IPV6_2292HOPLIMIT:
|
2005-04-16 16:20:36 -06:00
|
|
|
case IPV6_HOPLIMIT:
|
|
|
|
if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
*hlimit = *(int *)CMSG_DATA(cmsg);
|
|
|
|
break;
|
|
|
|
|
2005-09-07 19:19:03 -06:00
|
|
|
case IPV6_TCLASS:
|
|
|
|
{
|
|
|
|
int tc;
|
|
|
|
|
|
|
|
err = -EINVAL;
|
|
|
|
if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) {
|
|
|
|
goto exit_f;
|
|
|
|
}
|
|
|
|
|
|
|
|
tc = *(int *)CMSG_DATA(cmsg);
|
|
|
|
if (tc < 0 || tc > 0xff)
|
|
|
|
goto exit_f;
|
|
|
|
|
|
|
|
err = 0;
|
|
|
|
*tclass = tc;
|
|
|
|
|
|
|
|
break;
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
default:
|
2005-08-09 21:50:53 -06:00
|
|
|
LIMIT_NETDEBUG(KERN_DEBUG "invalid cmsg type: %d\n",
|
|
|
|
cmsg->cmsg_type);
|
2005-04-16 16:20:36 -06:00
|
|
|
err = -EINVAL;
|
|
|
|
break;
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
exit_f:
|
|
|
|
return err;
|
|
|
|
}
|