278 lines
7.2 KiB
C
278 lines
7.2 KiB
C
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* "Ping" sockets
|
|
*
|
|
* 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.
|
|
*
|
|
* Based on ipv4/ping.c code.
|
|
*
|
|
* Authors: Lorenzo Colitti (IPv6 support)
|
|
* Vasiliy Kulikov / Openwall (IPv4 implementation, for Linux 2.6),
|
|
* Pavel Kankovsky (IPv4 implementation, for Linux 2.4.32)
|
|
*
|
|
*/
|
|
|
|
#include <net/addrconf.h>
|
|
#include <net/ipv6.h>
|
|
#include <net/ip6_route.h>
|
|
#include <net/protocol.h>
|
|
#include <net/udp.h>
|
|
#include <net/transp_v6.h>
|
|
#include <net/ping.h>
|
|
|
|
struct proto pingv6_prot = {
|
|
.name = "PINGv6",
|
|
.owner = THIS_MODULE,
|
|
.init = ping_init_sock,
|
|
.close = ping_close,
|
|
.connect = ip6_datagram_connect,
|
|
.disconnect = udp_disconnect,
|
|
.setsockopt = ipv6_setsockopt,
|
|
.getsockopt = ipv6_getsockopt,
|
|
.sendmsg = ping_v6_sendmsg,
|
|
.recvmsg = ping_recvmsg,
|
|
.bind = ping_bind,
|
|
.backlog_rcv = ping_queue_rcv_skb,
|
|
.hash = ping_hash,
|
|
.unhash = ping_unhash,
|
|
.get_port = ping_get_port,
|
|
.obj_size = sizeof(struct raw6_sock),
|
|
};
|
|
EXPORT_SYMBOL_GPL(pingv6_prot);
|
|
|
|
static struct inet_protosw pingv6_protosw = {
|
|
.type = SOCK_DGRAM,
|
|
.protocol = IPPROTO_ICMPV6,
|
|
.prot = &pingv6_prot,
|
|
.ops = &inet6_dgram_ops,
|
|
.no_check = UDP_CSUM_DEFAULT,
|
|
.flags = INET_PROTOSW_REUSE,
|
|
};
|
|
|
|
|
|
/* Compatibility glue so we can support IPv6 when it's compiled as a module */
|
|
static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
|
|
{
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
static int dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
|
|
struct sk_buff *skb)
|
|
{
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
|
|
{
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
|
|
__be16 port, u32 info, u8 *payload) {}
|
|
static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
|
|
const struct net_device *dev, int strict)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
|
|
size_t len)
|
|
{
|
|
struct inet_sock *inet = inet_sk(sk);
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
struct icmp6hdr user_icmph;
|
|
int addr_type;
|
|
struct in6_addr *daddr;
|
|
int iif = 0;
|
|
struct flowi6 fl6;
|
|
int err;
|
|
int hlimit;
|
|
struct dst_entry *dst;
|
|
struct rt6_info *rt;
|
|
struct pingfakehdr pfh;
|
|
|
|
pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
|
|
|
|
err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
|
|
sizeof(user_icmph));
|
|
if (err)
|
|
return err;
|
|
|
|
if (msg->msg_name) {
|
|
struct sockaddr_in6 *u = (struct sockaddr_in6 *) msg->msg_name;
|
|
if (msg->msg_namelen < sizeof(struct sockaddr_in6) ||
|
|
u->sin6_family != AF_INET6) {
|
|
return -EINVAL;
|
|
}
|
|
if (sk->sk_bound_dev_if &&
|
|
sk->sk_bound_dev_if != u->sin6_scope_id) {
|
|
return -EINVAL;
|
|
}
|
|
daddr = &(u->sin6_addr);
|
|
iif = u->sin6_scope_id;
|
|
} else {
|
|
if (sk->sk_state != TCP_ESTABLISHED)
|
|
return -EDESTADDRREQ;
|
|
daddr = &sk->sk_v6_daddr;
|
|
}
|
|
|
|
if (!iif)
|
|
iif = sk->sk_bound_dev_if;
|
|
|
|
addr_type = ipv6_addr_type(daddr);
|
|
if (__ipv6_addr_needs_scope_id(addr_type) && !iif)
|
|
return -EINVAL;
|
|
if (addr_type & IPV6_ADDR_MAPPED)
|
|
return -EINVAL;
|
|
|
|
/* TODO: use ip6_datagram_send_ctl to get options from cmsg */
|
|
|
|
memset(&fl6, 0, sizeof(fl6));
|
|
|
|
fl6.flowi6_proto = IPPROTO_ICMPV6;
|
|
fl6.saddr = np->saddr;
|
|
fl6.daddr = *daddr;
|
|
fl6.fl6_icmp_type = user_icmph.icmp6_type;
|
|
fl6.fl6_icmp_code = user_icmph.icmp6_code;
|
|
security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
|
|
|
|
if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
|
|
fl6.flowi6_oif = np->mcast_oif;
|
|
else if (!fl6.flowi6_oif)
|
|
fl6.flowi6_oif = np->ucast_oif;
|
|
|
|
dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr, 1);
|
|
if (IS_ERR(dst))
|
|
return PTR_ERR(dst);
|
|
rt = (struct rt6_info *) dst;
|
|
|
|
np = inet6_sk(sk);
|
|
if (!np)
|
|
return -EBADF;
|
|
|
|
if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
|
|
fl6.flowi6_oif = np->mcast_oif;
|
|
else if (!fl6.flowi6_oif)
|
|
fl6.flowi6_oif = np->ucast_oif;
|
|
|
|
pfh.icmph.type = user_icmph.icmp6_type;
|
|
pfh.icmph.code = user_icmph.icmp6_code;
|
|
pfh.icmph.checksum = 0;
|
|
pfh.icmph.un.echo.id = inet->inet_sport;
|
|
pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
|
|
pfh.iov = msg->msg_iov;
|
|
pfh.wcheck = 0;
|
|
pfh.family = AF_INET6;
|
|
|
|
if (ipv6_addr_is_multicast(&fl6.daddr))
|
|
hlimit = np->mcast_hops;
|
|
else
|
|
hlimit = np->hop_limit;
|
|
if (hlimit < 0)
|
|
hlimit = ip6_dst_hoplimit(dst);
|
|
|
|
lock_sock(sk);
|
|
err = ip6_append_data(sk, ping_getfrag, &pfh, len,
|
|
0, hlimit,
|
|
np->tclass, NULL, &fl6, rt,
|
|
MSG_DONTWAIT, np->dontfrag);
|
|
|
|
if (err) {
|
|
ICMP6_INC_STATS_BH(sock_net(sk), rt->rt6i_idev,
|
|
ICMP6_MIB_OUTERRORS);
|
|
ip6_flush_pending_frames(sk);
|
|
} else {
|
|
err = icmpv6_push_pending_frames(sk, &fl6,
|
|
(struct icmp6hdr *) &pfh.icmph,
|
|
len);
|
|
}
|
|
release_sock(sk);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
return len;
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
return ping_seq_start(seq, pos, AF_INET6);
|
|
}
|
|
|
|
static int ping_v6_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
if (v == SEQ_START_TOKEN) {
|
|
seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
|
|
} else {
|
|
int bucket = ((struct ping_iter_state *) seq->private)->bucket;
|
|
struct inet_sock *inet = inet_sk(v);
|
|
__u16 srcp = ntohs(inet->inet_sport);
|
|
__u16 destp = ntohs(inet->inet_dport);
|
|
ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct ping_seq_afinfo ping_v6_seq_afinfo = {
|
|
.name = "icmp6",
|
|
.family = AF_INET6,
|
|
.seq_fops = &ping_seq_fops,
|
|
.seq_ops = {
|
|
.start = ping_v6_seq_start,
|
|
.show = ping_v6_seq_show,
|
|
.next = ping_seq_next,
|
|
.stop = ping_seq_stop,
|
|
},
|
|
};
|
|
|
|
static int __net_init ping_v6_proc_init_net(struct net *net)
|
|
{
|
|
return ping_proc_register(net, &ping_v6_seq_afinfo);
|
|
}
|
|
|
|
static void __net_init ping_v6_proc_exit_net(struct net *net)
|
|
{
|
|
return ping_proc_unregister(net, &ping_v6_seq_afinfo);
|
|
}
|
|
|
|
static struct pernet_operations ping_v6_net_ops = {
|
|
.init = ping_v6_proc_init_net,
|
|
.exit = ping_v6_proc_exit_net,
|
|
};
|
|
#endif
|
|
|
|
int __init pingv6_init(void)
|
|
{
|
|
#ifdef CONFIG_PROC_FS
|
|
int ret = register_pernet_subsys(&ping_v6_net_ops);
|
|
if (ret)
|
|
return ret;
|
|
#endif
|
|
pingv6_ops.ipv6_recv_error = ipv6_recv_error;
|
|
pingv6_ops.ip6_datagram_recv_ctl = ip6_datagram_recv_ctl;
|
|
pingv6_ops.icmpv6_err_convert = icmpv6_err_convert;
|
|
pingv6_ops.ipv6_icmp_error = ipv6_icmp_error;
|
|
pingv6_ops.ipv6_chk_addr = ipv6_chk_addr;
|
|
return inet6_register_protosw(&pingv6_protosw);
|
|
}
|
|
|
|
/* This never gets called because it's not possible to unload the ipv6 module,
|
|
* but just in case.
|
|
*/
|
|
void pingv6_exit(void)
|
|
{
|
|
pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
|
|
pingv6_ops.ip6_datagram_recv_ctl = dummy_ip6_datagram_recv_ctl;
|
|
pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
|
|
pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
|
|
pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
|
|
#ifdef CONFIG_PROC_FS
|
|
unregister_pernet_subsys(&ping_v6_net_ops);
|
|
#endif
|
|
inet6_unregister_protosw(&pingv6_protosw);
|
|
}
|