ipv6-objs := af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
addrlabel.o \
- route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o \
+ route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp_ipv6.o \
raw.o protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
exthdrs.o datagram.o ip6_flowlabel.o inet6_connection_sock.o
ipv6-$(CONFIG_IPV6_MULTIPLE_TABLES) += fib6_rules.o
ipv6-$(CONFIG_PROC_FS) += proc.o
ipv6-$(CONFIG_SYN_COOKIES) += syncookies.o
-ipv6-$(CONFIG_IP_UDPLITE) += udplite.o
+ipv6-$(CONFIG_IP_UDPLITE) += udplite_ipv6.o
ipv6-objs += $(ipv6-y)
+++ /dev/null
-/*
- * UDP over IPv6
- * Linux INET6 implementation
- *
- * Authors:
- * Pedro Roque <roque@di.fc.ul.pt>
- *
- * Based on linux/ipv4/udp.c
- *
- * $Id: udp.c,v 1.65 2002/02/01 22:01:04 davem Exp $
- *
- * Fixes:
- * Hideaki YOSHIFUJI : sin6_scope_id support
- * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which
- * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind
- * a single port at the same time.
- * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
- * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file.
- *
- * 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/socket.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/in6.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/ipv6.h>
-#include <linux/icmpv6.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <asm/uaccess.h>
-
-#include <net/ndisc.h>
-#include <net/protocol.h>
-#include <net/transp_v6.h>
-#include <net/ip6_route.h>
-#include <net/raw.h>
-#include <net/tcp_states.h>
-#include <net/ip6_checksum.h>
-#include <net/xfrm.h>
-
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include "udp_impl.h"
-
-static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
-{
- return udp_get_port(sk, snum, ipv6_rcv_saddr_equal);
-}
-
-static struct sock *__udp6_lib_lookup(struct net *net,
- struct in6_addr *saddr, __be16 sport,
- struct in6_addr *daddr, __be16 dport,
- int dif, struct hlist_head udptable[])
-{
- struct sock *sk, *result = NULL;
- struct hlist_node *node;
- unsigned short hnum = ntohs(dport);
- int badness = -1;
-
- read_lock(&udp_hash_lock);
- sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (sk->sk_net == net && sk->sk_hash == hnum &&
- sk->sk_family == PF_INET6) {
- struct ipv6_pinfo *np = inet6_sk(sk);
- int score = 0;
- if (inet->dport) {
- if (inet->dport != sport)
- continue;
- score++;
- }
- if (!ipv6_addr_any(&np->rcv_saddr)) {
- if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
- continue;
- score++;
- }
- if (!ipv6_addr_any(&np->daddr)) {
- if (!ipv6_addr_equal(&np->daddr, saddr))
- continue;
- score++;
- }
- if (sk->sk_bound_dev_if) {
- if (sk->sk_bound_dev_if != dif)
- continue;
- score++;
- }
- if (score == 4) {
- result = sk;
- break;
- } else if (score > badness) {
- result = sk;
- badness = score;
- }
- }
- }
- if (result)
- sock_hold(result);
- read_unlock(&udp_hash_lock);
- return result;
-}
-
-/*
- * This should be easy, if there is something there we
- * return it, otherwise we block.
- */
-
-int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
-{
- struct ipv6_pinfo *np = inet6_sk(sk);
- struct inet_sock *inet = inet_sk(sk);
- struct sk_buff *skb;
- unsigned int ulen, copied;
- int peeked;
- int err;
- int is_udplite = IS_UDPLITE(sk);
-
- if (addr_len)
- *addr_len=sizeof(struct sockaddr_in6);
-
- if (flags & MSG_ERRQUEUE)
- return ipv6_recv_error(sk, msg, len);
-
-try_again:
- skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0),
- &peeked, &err);
- if (!skb)
- goto out;
-
- ulen = skb->len - sizeof(struct udphdr);
- copied = len;
- if (copied > ulen)
- copied = ulen;
- else if (copied < ulen)
- msg->msg_flags |= MSG_TRUNC;
-
- /*
- * If checksum is needed at all, try to do it while copying the
- * data. If the data is truncated, or if we only want a partial
- * coverage checksum (UDP-Lite), do it before the copy.
- */
-
- if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
- if (udp_lib_checksum_complete(skb))
- goto csum_copy_err;
- }
-
- if (skb_csum_unnecessary(skb))
- err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
- msg->msg_iov, copied );
- else {
- err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
- if (err == -EINVAL)
- goto csum_copy_err;
- }
- if (err)
- goto out_free;
-
- if (!peeked)
- UDP6_INC_STATS_USER(UDP_MIB_INDATAGRAMS, is_udplite);
-
- sock_recv_timestamp(msg, sk, skb);
-
- /* Copy the address. */
- if (msg->msg_name) {
- struct sockaddr_in6 *sin6;
-
- sin6 = (struct sockaddr_in6 *) msg->msg_name;
- sin6->sin6_family = AF_INET6;
- sin6->sin6_port = udp_hdr(skb)->source;
- sin6->sin6_flowinfo = 0;
- sin6->sin6_scope_id = 0;
-
- if (skb->protocol == htons(ETH_P_IP))
- ipv6_addr_set(&sin6->sin6_addr, 0, 0,
- htonl(0xffff), ip_hdr(skb)->saddr);
- else {
- ipv6_addr_copy(&sin6->sin6_addr,
- &ipv6_hdr(skb)->saddr);
- if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
- sin6->sin6_scope_id = IP6CB(skb)->iif;
- }
-
- }
- if (skb->protocol == htons(ETH_P_IP)) {
- if (inet->cmsg_flags)
- ip_cmsg_recv(msg, skb);
- } else {
- if (np->rxopt.all)
- datagram_recv_ctl(sk, msg, skb);
- }
-
- err = copied;
- if (flags & MSG_TRUNC)
- err = ulen;
-
-out_free:
- lock_sock(sk);
- skb_free_datagram(sk, skb);
- release_sock(sk);
-out:
- return err;
-
-csum_copy_err:
- lock_sock(sk);
- if (!skb_kill_datagram(sk, skb, flags))
- UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
- release_sock(sk);
-
- if (flags & MSG_DONTWAIT)
- return -EAGAIN;
- goto try_again;
-}
-
-void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
- int type, int code, int offset, __be32 info,
- struct hlist_head udptable[] )
-{
- struct ipv6_pinfo *np;
- struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
- struct in6_addr *saddr = &hdr->saddr;
- struct in6_addr *daddr = &hdr->daddr;
- struct udphdr *uh = (struct udphdr*)(skb->data+offset);
- struct sock *sk;
- int err;
-
- sk = __udp6_lib_lookup(skb->dev->nd_net, daddr, uh->dest,
- saddr, uh->source, inet6_iif(skb), udptable);
- if (sk == NULL)
- return;
-
- np = inet6_sk(sk);
-
- if (!icmpv6_err_convert(type, code, &err) && !np->recverr)
- goto out;
-
- if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
- goto out;
-
- if (np->recverr)
- ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
-
- sk->sk_err = err;
- sk->sk_error_report(sk);
-out:
- sock_put(sk);
-}
-
-static __inline__ void udpv6_err(struct sk_buff *skb,
- struct inet6_skb_parm *opt, int type,
- int code, int offset, __be32 info )
-{
- __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash);
-}
-
-int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
-{
- struct udp_sock *up = udp_sk(sk);
- int rc;
- int is_udplite = IS_UDPLITE(sk);
-
- if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
- goto drop;
-
- /*
- * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
- */
- if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
-
- if (up->pcrlen == 0) { /* full coverage was set */
- LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage"
- " %d while full coverage %d requested\n",
- UDP_SKB_CB(skb)->cscov, skb->len);
- goto drop;
- }
- if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
- LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d "
- "too small, need min %d\n",
- UDP_SKB_CB(skb)->cscov, up->pcrlen);
- goto drop;
- }
- }
-
- if (sk->sk_filter) {
- if (udp_lib_checksum_complete(skb))
- goto drop;
- }
-
- if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
- /* Note that an ENOMEM error is charged twice */
- if (rc == -ENOMEM)
- UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, is_udplite);
- goto drop;
- }
-
- return 0;
-drop:
- UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite);
- kfree_skb(skb);
- return -1;
-}
-
-static struct sock *udp_v6_mcast_next(struct sock *sk,
- __be16 loc_port, struct in6_addr *loc_addr,
- __be16 rmt_port, struct in6_addr *rmt_addr,
- int dif)
-{
- struct hlist_node *node;
- struct sock *s = sk;
- unsigned short num = ntohs(loc_port);
-
- sk_for_each_from(s, node) {
- struct inet_sock *inet = inet_sk(s);
-
- if (s->sk_hash == num && s->sk_family == PF_INET6) {
- struct ipv6_pinfo *np = inet6_sk(s);
- if (inet->dport) {
- if (inet->dport != rmt_port)
- continue;
- }
- if (!ipv6_addr_any(&np->daddr) &&
- !ipv6_addr_equal(&np->daddr, rmt_addr))
- continue;
-
- if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif)
- continue;
-
- if (!ipv6_addr_any(&np->rcv_saddr)) {
- if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
- continue;
- }
- if (!inet6_mc_check(s, loc_addr, rmt_addr))
- continue;
- return s;
- }
- }
- return NULL;
-}
-
-/*
- * Note: called only from the BH handler context,
- * so we don't need to lock the hashes.
- */
-static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr,
- struct in6_addr *daddr, struct hlist_head udptable[])
-{
- struct sock *sk, *sk2;
- const struct udphdr *uh = udp_hdr(skb);
- int dif;
-
- read_lock(&udp_hash_lock);
- sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]);
- dif = inet6_iif(skb);
- sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
- if (!sk) {
- kfree_skb(skb);
- goto out;
- }
-
- sk2 = sk;
- while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr,
- uh->source, saddr, dif))) {
- struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
- if (buff) {
- bh_lock_sock_nested(sk2);
- if (!sock_owned_by_user(sk2))
- udpv6_queue_rcv_skb(sk2, buff);
- else
- sk_add_backlog(sk2, buff);
- bh_unlock_sock(sk2);
- }
- }
- bh_lock_sock_nested(sk);
- if (!sock_owned_by_user(sk))
- udpv6_queue_rcv_skb(sk, skb);
- else
- sk_add_backlog(sk, skb);
- bh_unlock_sock(sk);
-out:
- read_unlock(&udp_hash_lock);
- return 0;
-}
-
-static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
- int proto)
-{
- int err;
-
- UDP_SKB_CB(skb)->partial_cov = 0;
- UDP_SKB_CB(skb)->cscov = skb->len;
-
- if (IS_PROTO_UDPLITE(proto)) {
- err = udplite_checksum_init(skb, uh);
- if (err)
- return err;
- }
-
- if (uh->check == 0) {
- /* RFC 2460 section 8.1 says that we SHOULD log
- this error. Well, it is reasonable.
- */
- LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
- return 1;
- }
- if (skb->ip_summed == CHECKSUM_COMPLETE &&
- !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
- skb->len, proto, skb->csum))
- skb->ip_summed = CHECKSUM_UNNECESSARY;
-
- if (!skb_csum_unnecessary(skb))
- skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
- &ipv6_hdr(skb)->daddr,
- skb->len, proto, 0));
-
- return 0;
-}
-
-int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
- int proto)
-{
- struct sock *sk;
- struct udphdr *uh;
- struct net_device *dev = skb->dev;
- struct in6_addr *saddr, *daddr;
- u32 ulen = 0;
-
- if (!pskb_may_pull(skb, sizeof(struct udphdr)))
- goto short_packet;
-
- saddr = &ipv6_hdr(skb)->saddr;
- daddr = &ipv6_hdr(skb)->daddr;
- uh = udp_hdr(skb);
-
- ulen = ntohs(uh->len);
- if (ulen > skb->len)
- goto short_packet;
-
- if (proto == IPPROTO_UDP) {
- /* UDP validates ulen. */
-
- /* Check for jumbo payload */
- if (ulen == 0)
- ulen = skb->len;
-
- if (ulen < sizeof(*uh))
- goto short_packet;
-
- if (ulen < skb->len) {
- if (pskb_trim_rcsum(skb, ulen))
- goto short_packet;
- saddr = &ipv6_hdr(skb)->saddr;
- daddr = &ipv6_hdr(skb)->daddr;
- uh = udp_hdr(skb);
- }
- }
-
- if (udp6_csum_init(skb, uh, proto))
- goto discard;
-
- /*
- * Multicast receive code
- */
- if (ipv6_addr_is_multicast(daddr))
- return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable);
-
- /* Unicast */
-
- /*
- * check socket cache ... must talk to Alan about his plans
- * for sock caches... i'll skip this for now.
- */
- sk = __udp6_lib_lookup(skb->dev->nd_net, saddr, uh->source,
- daddr, uh->dest, inet6_iif(skb), udptable);
-
- if (sk == NULL) {
- if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
- goto discard;
-
- if (udp_lib_checksum_complete(skb))
- goto discard;
- UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, IS_PROTO_UDPLITE(proto));
-
- icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
-
- kfree_skb(skb);
- return 0;
- }
-
- /* deliver */
-
- bh_lock_sock_nested(sk);
- if (!sock_owned_by_user(sk))
- udpv6_queue_rcv_skb(sk, skb);
- else
- sk_add_backlog(sk, skb);
- bh_unlock_sock(sk);
- sock_put(sk);
- return 0;
-
-short_packet:
- LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
- IS_PROTO_UDPLITE(proto) ? "-Lite" : "",
- ulen, skb->len);
-
-discard:
- UDP6_INC_STATS_BH(UDP_MIB_INERRORS, IS_PROTO_UDPLITE(proto));
- kfree_skb(skb);
- return 0;
-}
-
-static __inline__ int udpv6_rcv(struct sk_buff *skb)
-{
- return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP);
-}
-
-/*
- * Throw away all pending data and cancel the corking. Socket is locked.
- */
-static void udp_v6_flush_pending_frames(struct sock *sk)
-{
- struct udp_sock *up = udp_sk(sk);
-
- if (up->pending) {
- up->len = 0;
- up->pending = 0;
- ip6_flush_pending_frames(sk);
- }
-}
-
-/*
- * Sending
- */
-
-static int udp_v6_push_pending_frames(struct sock *sk)
-{
- struct sk_buff *skb;
- struct udphdr *uh;
- struct udp_sock *up = udp_sk(sk);
- struct inet_sock *inet = inet_sk(sk);
- struct flowi *fl = &inet->cork.fl;
- int err = 0;
- int is_udplite = IS_UDPLITE(sk);
- __wsum csum = 0;
-
- /* Grab the skbuff where UDP header space exists. */
- if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
- goto out;
-
- /*
- * Create a UDP header
- */
- uh = udp_hdr(skb);
- uh->source = fl->fl_ip_sport;
- uh->dest = fl->fl_ip_dport;
- uh->len = htons(up->len);
- uh->check = 0;
-
- if (is_udplite)
- csum = udplite_csum_outgoing(sk, skb);
- else
- csum = udp_csum_outgoing(sk, skb);
-
- /* add protocol-dependent pseudo-header */
- uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst,
- up->len, fl->proto, csum );
- if (uh->check == 0)
- uh->check = CSUM_MANGLED_0;
-
- err = ip6_push_pending_frames(sk);
-out:
- up->len = 0;
- up->pending = 0;
- if (!err)
- UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite);
- return err;
-}
-
-int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t len)
-{
- struct ipv6_txoptions opt_space;
- struct udp_sock *up = udp_sk(sk);
- struct inet_sock *inet = inet_sk(sk);
- struct ipv6_pinfo *np = inet6_sk(sk);
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
- struct in6_addr *daddr, *final_p = NULL, final;
- struct ipv6_txoptions *opt = NULL;
- struct ip6_flowlabel *flowlabel = NULL;
- struct flowi fl;
- struct dst_entry *dst;
- int addr_len = msg->msg_namelen;
- int ulen = len;
- int hlimit = -1;
- int tclass = -1;
- int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
- int err;
- int connected = 0;
- int is_udplite = IS_UDPLITE(sk);
- int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
-
- /* destination address check */
- if (sin6) {
- if (addr_len < offsetof(struct sockaddr, sa_data))
- return -EINVAL;
-
- switch (sin6->sin6_family) {
- case AF_INET6:
- if (addr_len < SIN6_LEN_RFC2133)
- return -EINVAL;
- daddr = &sin6->sin6_addr;
- break;
- case AF_INET:
- goto do_udp_sendmsg;
- case AF_UNSPEC:
- msg->msg_name = sin6 = NULL;
- msg->msg_namelen = addr_len = 0;
- daddr = NULL;
- break;
- default:
- return -EINVAL;
- }
- } else if (!up->pending) {
- if (sk->sk_state != TCP_ESTABLISHED)
- return -EDESTADDRREQ;
- daddr = &np->daddr;
- } else
- daddr = NULL;
-
- if (daddr) {
- if (ipv6_addr_v4mapped(daddr)) {
- struct sockaddr_in sin;
- sin.sin_family = AF_INET;
- sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
- sin.sin_addr.s_addr = daddr->s6_addr32[3];
- msg->msg_name = &sin;
- msg->msg_namelen = sizeof(sin);
-do_udp_sendmsg:
- if (__ipv6_only_sock(sk))
- return -ENETUNREACH;
- return udp_sendmsg(iocb, sk, msg, len);
- }
- }
-
- if (up->pending == AF_INET)
- return udp_sendmsg(iocb, sk, msg, len);
-
- /* Rough check on arithmetic overflow,
- better check is made in ip6_append_data().
- */
- if (len > INT_MAX - sizeof(struct udphdr))
- return -EMSGSIZE;
-
- if (up->pending) {
- /*
- * There are pending frames.
- * The socket lock must be held while it's corked.
- */
- lock_sock(sk);
- if (likely(up->pending)) {
- if (unlikely(up->pending != AF_INET6)) {
- release_sock(sk);
- return -EAFNOSUPPORT;
- }
- dst = NULL;
- goto do_append_data;
- }
- release_sock(sk);
- }
- ulen += sizeof(struct udphdr);
-
- memset(&fl, 0, sizeof(fl));
-
- if (sin6) {
- if (sin6->sin6_port == 0)
- return -EINVAL;
-
- fl.fl_ip_dport = sin6->sin6_port;
- daddr = &sin6->sin6_addr;
-
- if (np->sndflow) {
- fl.fl6_flowlabel = sin6->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;
- daddr = &flowlabel->dst;
- }
- }
-
- /*
- * Otherwise it will be difficult to maintain
- * sk->sk_dst_cache.
- */
- if (sk->sk_state == TCP_ESTABLISHED &&
- ipv6_addr_equal(daddr, &np->daddr))
- daddr = &np->daddr;
-
- if (addr_len >= sizeof(struct sockaddr_in6) &&
- sin6->sin6_scope_id &&
- ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
- fl.oif = sin6->sin6_scope_id;
- } else {
- if (sk->sk_state != TCP_ESTABLISHED)
- return -EDESTADDRREQ;
-
- fl.fl_ip_dport = inet->dport;
- daddr = &np->daddr;
- fl.fl6_flowlabel = np->flow_label;
- connected = 1;
- }
-
- if (!fl.oif)
- fl.oif = sk->sk_bound_dev_if;
-
- if (msg->msg_controllen) {
- opt = &opt_space;
- memset(opt, 0, sizeof(struct ipv6_txoptions));
- opt->tot_len = sizeof(*opt);
-
- err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
- if (err < 0) {
- fl6_sock_release(flowlabel);
- return err;
- }
- if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
- flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
- if (flowlabel == NULL)
- return -EINVAL;
- }
- if (!(opt->opt_nflen|opt->opt_flen))
- opt = NULL;
- connected = 0;
- }
- if (opt == NULL)
- opt = np->opt;
- if (flowlabel)
- opt = fl6_merge_options(&opt_space, flowlabel, opt);
- opt = ipv6_fixup_options(&opt_space, opt);
-
- fl.proto = sk->sk_protocol;
- ipv6_addr_copy(&fl.fl6_dst, daddr);
- if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
- ipv6_addr_copy(&fl.fl6_src, &np->saddr);
- fl.fl_ip_sport = inet->sport;
-
- /* merge ip6_build_xmit from ip6_output */
- if (opt && opt->srcrt) {
- struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
- ipv6_addr_copy(&final, &fl.fl6_dst);
- ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
- final_p = &final;
- connected = 0;
- }
-
- if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
- fl.oif = np->mcast_oif;
- connected = 0;
- }
-
- security_sk_classify_flow(sk, &fl);
-
- err = ip6_sk_dst_lookup(sk, &dst, &fl);
- if (err)
- goto out;
- if (final_p)
- ipv6_addr_copy(&fl.fl6_dst, final_p);
-
- if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
- if (err == -EREMOTE)
- err = ip6_dst_blackhole(sk, &dst, &fl);
- if (err < 0)
- goto out;
- }
-
- if (hlimit < 0) {
- if (ipv6_addr_is_multicast(&fl.fl6_dst))
- hlimit = np->mcast_hops;
- else
- hlimit = np->hop_limit;
- if (hlimit < 0)
- hlimit = dst_metric(dst, RTAX_HOPLIMIT);
- if (hlimit < 0)
- hlimit = ipv6_get_hoplimit(dst->dev);
- }
-
- if (tclass < 0) {
- tclass = np->tclass;
- if (tclass < 0)
- tclass = 0;
- }
-
- if (msg->msg_flags&MSG_CONFIRM)
- goto do_confirm;
-back_from_confirm:
-
- lock_sock(sk);
- if (unlikely(up->pending)) {
- /* The socket is already corked while preparing it. */
- /* ... which is an evident application bug. --ANK */
- release_sock(sk);
-
- LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
- err = -EINVAL;
- goto out;
- }
-
- up->pending = AF_INET6;
-
-do_append_data:
- up->len += ulen;
- getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
- err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
- sizeof(struct udphdr), hlimit, tclass, opt, &fl,
- (struct rt6_info*)dst,
- corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
- if (err)
- udp_v6_flush_pending_frames(sk);
- else if (!corkreq)
- err = udp_v6_push_pending_frames(sk);
- else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
- up->pending = 0;
-
- if (dst) {
- if (connected) {
- ip6_dst_store(sk, dst,
- ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
- &np->daddr : NULL,
-#ifdef CONFIG_IPV6_SUBTREES
- ipv6_addr_equal(&fl.fl6_src, &np->saddr) ?
- &np->saddr :
-#endif
- NULL);
- } else {
- dst_release(dst);
- }
- }
-
- if (err > 0)
- err = np->recverr ? net_xmit_errno(err) : 0;
- release_sock(sk);
-out:
- fl6_sock_release(flowlabel);
- if (!err)
- return len;
- /*
- * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
- * ENOBUFS might not be good (it's not tunable per se), but otherwise
- * we don't have a good statistic (IpOutDiscards but it can be too many
- * things). We could add another new stat but at least for now that
- * seems like overkill.
- */
- if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
- UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite);
- }
- return err;
-
-do_confirm:
- dst_confirm(dst);
- if (!(msg->msg_flags&MSG_PROBE) || len)
- goto back_from_confirm;
- err = 0;
- goto out;
-}
-
-int udpv6_destroy_sock(struct sock *sk)
-{
- lock_sock(sk);
- udp_v6_flush_pending_frames(sk);
- release_sock(sk);
-
- inet6_destroy_sock(sk);
-
- return 0;
-}
-
-/*
- * Socket option code for UDP
- */
-int udpv6_setsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int optlen)
-{
- if (IS_SOL_UDPFAMILY(level))
- return udp_lib_setsockopt(sk, level, optname, optval, optlen,
- udp_v6_push_pending_frames);
- return ipv6_setsockopt(sk, level, optname, optval, optlen);
-}
-
-#ifdef CONFIG_COMPAT
-int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int optlen)
-{
- if (IS_SOL_UDPFAMILY(level))
- return udp_lib_setsockopt(sk, level, optname, optval, optlen,
- udp_v6_push_pending_frames);
- return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
-}
-#endif
-
-int udpv6_getsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int __user *optlen)
-{
- if (IS_SOL_UDPFAMILY(level))
- return udp_lib_getsockopt(sk, level, optname, optval, optlen);
- return ipv6_getsockopt(sk, level, optname, optval, optlen);
-}
-
-#ifdef CONFIG_COMPAT
-int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int __user *optlen)
-{
- if (IS_SOL_UDPFAMILY(level))
- return udp_lib_getsockopt(sk, level, optname, optval, optlen);
- return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
-}
-#endif
-
-static struct inet6_protocol udpv6_protocol = {
- .handler = udpv6_rcv,
- .err_handler = udpv6_err,
- .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
-};
-
-/* ------------------------------------------------------------------------ */
-#ifdef CONFIG_PROC_FS
-
-static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket)
-{
- struct inet_sock *inet = inet_sk(sp);
- struct ipv6_pinfo *np = inet6_sk(sp);
- struct in6_addr *dest, *src;
- __u16 destp, srcp;
-
- dest = &np->daddr;
- src = &np->rcv_saddr;
- destp = ntohs(inet->dport);
- srcp = ntohs(inet->sport);
- seq_printf(seq,
- "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
- "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
- bucket,
- src->s6_addr32[0], src->s6_addr32[1],
- src->s6_addr32[2], src->s6_addr32[3], srcp,
- dest->s6_addr32[0], dest->s6_addr32[1],
- dest->s6_addr32[2], dest->s6_addr32[3], destp,
- sp->sk_state,
- atomic_read(&sp->sk_wmem_alloc),
- atomic_read(&sp->sk_rmem_alloc),
- 0, 0L, 0,
- sock_i_uid(sp), 0,
- sock_i_ino(sp),
- atomic_read(&sp->sk_refcnt), sp);
-}
-
-int udp6_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN)
- seq_printf(seq,
- " sl "
- "local_address "
- "remote_address "
- "st tx_queue rx_queue tr tm->when retrnsmt"
- " uid timeout inode\n");
- else
- udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket);
- return 0;
-}
-
-static struct file_operations udp6_seq_fops;
-static struct udp_seq_afinfo udp6_seq_afinfo = {
- .owner = THIS_MODULE,
- .name = "udp6",
- .family = AF_INET6,
- .hashtable = udp_hash,
- .seq_show = udp6_seq_show,
- .seq_fops = &udp6_seq_fops,
-};
-
-int __init udp6_proc_init(void)
-{
- return udp_proc_register(&udp6_seq_afinfo);
-}
-
-void udp6_proc_exit(void) {
- udp_proc_unregister(&udp6_seq_afinfo);
-}
-#endif /* CONFIG_PROC_FS */
-
-/* ------------------------------------------------------------------------ */
-
-DEFINE_PROTO_INUSE(udpv6)
-
-struct proto udpv6_prot = {
- .name = "UDPv6",
- .owner = THIS_MODULE,
- .close = udp_lib_close,
- .connect = ip6_datagram_connect,
- .disconnect = udp_disconnect,
- .ioctl = udp_ioctl,
- .destroy = udpv6_destroy_sock,
- .setsockopt = udpv6_setsockopt,
- .getsockopt = udpv6_getsockopt,
- .sendmsg = udpv6_sendmsg,
- .recvmsg = udpv6_recvmsg,
- .backlog_rcv = udpv6_queue_rcv_skb,
- .hash = udp_lib_hash,
- .unhash = udp_lib_unhash,
- .get_port = udp_v6_get_port,
- .memory_allocated = &udp_memory_allocated,
- .sysctl_mem = sysctl_udp_mem,
- .sysctl_wmem = &sysctl_udp_wmem_min,
- .sysctl_rmem = &sysctl_udp_rmem_min,
- .obj_size = sizeof(struct udp6_sock),
-#ifdef CONFIG_COMPAT
- .compat_setsockopt = compat_udpv6_setsockopt,
- .compat_getsockopt = compat_udpv6_getsockopt,
-#endif
- REF_PROTO_INUSE(udpv6)
-};
-
-static struct inet_protosw udpv6_protosw = {
- .type = SOCK_DGRAM,
- .protocol = IPPROTO_UDP,
- .prot = &udpv6_prot,
- .ops = &inet6_dgram_ops,
- .capability =-1,
- .no_check = UDP_CSUM_DEFAULT,
- .flags = INET_PROTOSW_PERMANENT,
-};
-
-
-int __init udpv6_init(void)
-{
- int ret;
-
- ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP);
- if (ret)
- goto out;
-
- ret = inet6_register_protosw(&udpv6_protosw);
- if (ret)
- goto out_udpv6_protocol;
-out:
- return ret;
-
-out_udpv6_protocol:
- inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
- goto out;
-}
-
-void udpv6_exit(void)
-{
- inet6_unregister_protosw(&udpv6_protosw);
- inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
-}
--- /dev/null
+/*
+ * UDP over IPv6
+ * Linux INET6 implementation
+ *
+ * Authors:
+ * Pedro Roque <roque@di.fc.ul.pt>
+ *
+ * Based on linux/ipv4/udp.c
+ *
+ * $Id: udp.c,v 1.65 2002/02/01 22:01:04 davem Exp $
+ *
+ * Fixes:
+ * Hideaki YOSHIFUJI : sin6_scope_id support
+ * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which
+ * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind
+ * a single port at the same time.
+ * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
+ * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file.
+ *
+ * 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/socket.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/in6.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/ipv6.h>
+#include <linux/icmpv6.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <asm/uaccess.h>
+
+#include <net/ndisc.h>
+#include <net/protocol.h>
+#include <net/transp_v6.h>
+#include <net/ip6_route.h>
+#include <net/raw.h>
+#include <net/tcp_states.h>
+#include <net/ip6_checksum.h>
+#include <net/xfrm.h>
+
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include "udp_impl.h"
+
+static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
+{
+ return udp_get_port(sk, snum, ipv6_rcv_saddr_equal);
+}
+
+static struct sock *__udp6_lib_lookup(struct net *net,
+ struct in6_addr *saddr, __be16 sport,
+ struct in6_addr *daddr, __be16 dport,
+ int dif, struct hlist_head udptable[])
+{
+ struct sock *sk, *result = NULL;
+ struct hlist_node *node;
+ unsigned short hnum = ntohs(dport);
+ int badness = -1;
+
+ read_lock(&udp_hash_lock);
+ sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (sk->sk_net == net && sk->sk_hash == hnum &&
+ sk->sk_family == PF_INET6) {
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ int score = 0;
+ if (inet->dport) {
+ if (inet->dport != sport)
+ continue;
+ score++;
+ }
+ if (!ipv6_addr_any(&np->rcv_saddr)) {
+ if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
+ continue;
+ score++;
+ }
+ if (!ipv6_addr_any(&np->daddr)) {
+ if (!ipv6_addr_equal(&np->daddr, saddr))
+ continue;
+ score++;
+ }
+ if (sk->sk_bound_dev_if) {
+ if (sk->sk_bound_dev_if != dif)
+ continue;
+ score++;
+ }
+ if (score == 4) {
+ result = sk;
+ break;
+ } else if (score > badness) {
+ result = sk;
+ badness = score;
+ }
+ }
+ }
+ if (result)
+ sock_hold(result);
+ read_unlock(&udp_hash_lock);
+ return result;
+}
+
+/*
+ * This should be easy, if there is something there we
+ * return it, otherwise we block.
+ */
+
+int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t len,
+ int noblock, int flags, int *addr_len)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct inet_sock *inet = inet_sk(sk);
+ struct sk_buff *skb;
+ unsigned int ulen, copied;
+ int peeked;
+ int err;
+ int is_udplite = IS_UDPLITE(sk);
+
+ if (addr_len)
+ *addr_len=sizeof(struct sockaddr_in6);
+
+ if (flags & MSG_ERRQUEUE)
+ return ipv6_recv_error(sk, msg, len);
+
+try_again:
+ skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0),
+ &peeked, &err);
+ if (!skb)
+ goto out;
+
+ ulen = skb->len - sizeof(struct udphdr);
+ copied = len;
+ if (copied > ulen)
+ copied = ulen;
+ else if (copied < ulen)
+ msg->msg_flags |= MSG_TRUNC;
+
+ /*
+ * If checksum is needed at all, try to do it while copying the
+ * data. If the data is truncated, or if we only want a partial
+ * coverage checksum (UDP-Lite), do it before the copy.
+ */
+
+ if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
+ if (udp_lib_checksum_complete(skb))
+ goto csum_copy_err;
+ }
+
+ if (skb_csum_unnecessary(skb))
+ err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
+ msg->msg_iov, copied );
+ else {
+ err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
+ if (err == -EINVAL)
+ goto csum_copy_err;
+ }
+ if (err)
+ goto out_free;
+
+ if (!peeked)
+ UDP6_INC_STATS_USER(UDP_MIB_INDATAGRAMS, is_udplite);
+
+ sock_recv_timestamp(msg, sk, skb);
+
+ /* Copy the address. */
+ if (msg->msg_name) {
+ struct sockaddr_in6 *sin6;
+
+ sin6 = (struct sockaddr_in6 *) msg->msg_name;
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = udp_hdr(skb)->source;
+ sin6->sin6_flowinfo = 0;
+ sin6->sin6_scope_id = 0;
+
+ if (skb->protocol == htons(ETH_P_IP))
+ ipv6_addr_set(&sin6->sin6_addr, 0, 0,
+ htonl(0xffff), ip_hdr(skb)->saddr);
+ else {
+ ipv6_addr_copy(&sin6->sin6_addr,
+ &ipv6_hdr(skb)->saddr);
+ if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
+ sin6->sin6_scope_id = IP6CB(skb)->iif;
+ }
+
+ }
+ if (skb->protocol == htons(ETH_P_IP)) {
+ if (inet->cmsg_flags)
+ ip_cmsg_recv(msg, skb);
+ } else {
+ if (np->rxopt.all)
+ datagram_recv_ctl(sk, msg, skb);
+ }
+
+ err = copied;
+ if (flags & MSG_TRUNC)
+ err = ulen;
+
+out_free:
+ lock_sock(sk);
+ skb_free_datagram(sk, skb);
+ release_sock(sk);
+out:
+ return err;
+
+csum_copy_err:
+ lock_sock(sk);
+ if (!skb_kill_datagram(sk, skb, flags))
+ UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
+ release_sock(sk);
+
+ if (flags & MSG_DONTWAIT)
+ return -EAGAIN;
+ goto try_again;
+}
+
+void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
+ int type, int code, int offset, __be32 info,
+ struct hlist_head udptable[] )
+{
+ struct ipv6_pinfo *np;
+ struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
+ struct in6_addr *saddr = &hdr->saddr;
+ struct in6_addr *daddr = &hdr->daddr;
+ struct udphdr *uh = (struct udphdr*)(skb->data+offset);
+ struct sock *sk;
+ int err;
+
+ sk = __udp6_lib_lookup(skb->dev->nd_net, daddr, uh->dest,
+ saddr, uh->source, inet6_iif(skb), udptable);
+ if (sk == NULL)
+ return;
+
+ np = inet6_sk(sk);
+
+ if (!icmpv6_err_convert(type, code, &err) && !np->recverr)
+ goto out;
+
+ if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
+ goto out;
+
+ if (np->recverr)
+ ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
+
+ sk->sk_err = err;
+ sk->sk_error_report(sk);
+out:
+ sock_put(sk);
+}
+
+static __inline__ void udpv6_err(struct sk_buff *skb,
+ struct inet6_skb_parm *opt, int type,
+ int code, int offset, __be32 info )
+{
+ __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash);
+}
+
+int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
+{
+ struct udp_sock *up = udp_sk(sk);
+ int rc;
+ int is_udplite = IS_UDPLITE(sk);
+
+ if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
+ goto drop;
+
+ /*
+ * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
+ */
+ if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
+
+ if (up->pcrlen == 0) { /* full coverage was set */
+ LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage"
+ " %d while full coverage %d requested\n",
+ UDP_SKB_CB(skb)->cscov, skb->len);
+ goto drop;
+ }
+ if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
+ LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d "
+ "too small, need min %d\n",
+ UDP_SKB_CB(skb)->cscov, up->pcrlen);
+ goto drop;
+ }
+ }
+
+ if (sk->sk_filter) {
+ if (udp_lib_checksum_complete(skb))
+ goto drop;
+ }
+
+ if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
+ /* Note that an ENOMEM error is charged twice */
+ if (rc == -ENOMEM)
+ UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, is_udplite);
+ goto drop;
+ }
+
+ return 0;
+drop:
+ UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite);
+ kfree_skb(skb);
+ return -1;
+}
+
+static struct sock *udp_v6_mcast_next(struct sock *sk,
+ __be16 loc_port, struct in6_addr *loc_addr,
+ __be16 rmt_port, struct in6_addr *rmt_addr,
+ int dif)
+{
+ struct hlist_node *node;
+ struct sock *s = sk;
+ unsigned short num = ntohs(loc_port);
+
+ sk_for_each_from(s, node) {
+ struct inet_sock *inet = inet_sk(s);
+
+ if (s->sk_hash == num && s->sk_family == PF_INET6) {
+ struct ipv6_pinfo *np = inet6_sk(s);
+ if (inet->dport) {
+ if (inet->dport != rmt_port)
+ continue;
+ }
+ if (!ipv6_addr_any(&np->daddr) &&
+ !ipv6_addr_equal(&np->daddr, rmt_addr))
+ continue;
+
+ if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif)
+ continue;
+
+ if (!ipv6_addr_any(&np->rcv_saddr)) {
+ if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
+ continue;
+ }
+ if (!inet6_mc_check(s, loc_addr, rmt_addr))
+ continue;
+ return s;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * Note: called only from the BH handler context,
+ * so we don't need to lock the hashes.
+ */
+static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr,
+ struct in6_addr *daddr, struct hlist_head udptable[])
+{
+ struct sock *sk, *sk2;
+ const struct udphdr *uh = udp_hdr(skb);
+ int dif;
+
+ read_lock(&udp_hash_lock);
+ sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]);
+ dif = inet6_iif(skb);
+ sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
+ if (!sk) {
+ kfree_skb(skb);
+ goto out;
+ }
+
+ sk2 = sk;
+ while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr,
+ uh->source, saddr, dif))) {
+ struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
+ if (buff) {
+ bh_lock_sock_nested(sk2);
+ if (!sock_owned_by_user(sk2))
+ udpv6_queue_rcv_skb(sk2, buff);
+ else
+ sk_add_backlog(sk2, buff);
+ bh_unlock_sock(sk2);
+ }
+ }
+ bh_lock_sock_nested(sk);
+ if (!sock_owned_by_user(sk))
+ udpv6_queue_rcv_skb(sk, skb);
+ else
+ sk_add_backlog(sk, skb);
+ bh_unlock_sock(sk);
+out:
+ read_unlock(&udp_hash_lock);
+ return 0;
+}
+
+static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
+ int proto)
+{
+ int err;
+
+ UDP_SKB_CB(skb)->partial_cov = 0;
+ UDP_SKB_CB(skb)->cscov = skb->len;
+
+ if (IS_PROTO_UDPLITE(proto)) {
+ err = udplite_checksum_init(skb, uh);
+ if (err)
+ return err;
+ }
+
+ if (uh->check == 0) {
+ /* RFC 2460 section 8.1 says that we SHOULD log
+ this error. Well, it is reasonable.
+ */
+ LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
+ return 1;
+ }
+ if (skb->ip_summed == CHECKSUM_COMPLETE &&
+ !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
+ skb->len, proto, skb->csum))
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ if (!skb_csum_unnecessary(skb))
+ skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
+ &ipv6_hdr(skb)->daddr,
+ skb->len, proto, 0));
+
+ return 0;
+}
+
+int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
+ int proto)
+{
+ struct sock *sk;
+ struct udphdr *uh;
+ struct net_device *dev = skb->dev;
+ struct in6_addr *saddr, *daddr;
+ u32 ulen = 0;
+
+ if (!pskb_may_pull(skb, sizeof(struct udphdr)))
+ goto short_packet;
+
+ saddr = &ipv6_hdr(skb)->saddr;
+ daddr = &ipv6_hdr(skb)->daddr;
+ uh = udp_hdr(skb);
+
+ ulen = ntohs(uh->len);
+ if (ulen > skb->len)
+ goto short_packet;
+
+ if (proto == IPPROTO_UDP) {
+ /* UDP validates ulen. */
+
+ /* Check for jumbo payload */
+ if (ulen == 0)
+ ulen = skb->len;
+
+ if (ulen < sizeof(*uh))
+ goto short_packet;
+
+ if (ulen < skb->len) {
+ if (pskb_trim_rcsum(skb, ulen))
+ goto short_packet;
+ saddr = &ipv6_hdr(skb)->saddr;
+ daddr = &ipv6_hdr(skb)->daddr;
+ uh = udp_hdr(skb);
+ }
+ }
+
+ if (udp6_csum_init(skb, uh, proto))
+ goto discard;
+
+ /*
+ * Multicast receive code
+ */
+ if (ipv6_addr_is_multicast(daddr))
+ return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable);
+
+ /* Unicast */
+
+ /*
+ * check socket cache ... must talk to Alan about his plans
+ * for sock caches... i'll skip this for now.
+ */
+ sk = __udp6_lib_lookup(skb->dev->nd_net, saddr, uh->source,
+ daddr, uh->dest, inet6_iif(skb), udptable);
+
+ if (sk == NULL) {
+ if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
+ goto discard;
+
+ if (udp_lib_checksum_complete(skb))
+ goto discard;
+ UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, IS_PROTO_UDPLITE(proto));
+
+ icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
+
+ kfree_skb(skb);
+ return 0;
+ }
+
+ /* deliver */
+
+ bh_lock_sock_nested(sk);
+ if (!sock_owned_by_user(sk))
+ udpv6_queue_rcv_skb(sk, skb);
+ else
+ sk_add_backlog(sk, skb);
+ bh_unlock_sock(sk);
+ sock_put(sk);
+ return 0;
+
+short_packet:
+ LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
+ IS_PROTO_UDPLITE(proto) ? "-Lite" : "",
+ ulen, skb->len);
+
+discard:
+ UDP6_INC_STATS_BH(UDP_MIB_INERRORS, IS_PROTO_UDPLITE(proto));
+ kfree_skb(skb);
+ return 0;
+}
+
+static __inline__ int udpv6_rcv(struct sk_buff *skb)
+{
+ return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP);
+}
+
+/*
+ * Throw away all pending data and cancel the corking. Socket is locked.
+ */
+static void udp_v6_flush_pending_frames(struct sock *sk)
+{
+ struct udp_sock *up = udp_sk(sk);
+
+ if (up->pending) {
+ up->len = 0;
+ up->pending = 0;
+ ip6_flush_pending_frames(sk);
+ }
+}
+
+/*
+ * Sending
+ */
+
+static int udp_v6_push_pending_frames(struct sock *sk)
+{
+ struct sk_buff *skb;
+ struct udphdr *uh;
+ struct udp_sock *up = udp_sk(sk);
+ struct inet_sock *inet = inet_sk(sk);
+ struct flowi *fl = &inet->cork.fl;
+ int err = 0;
+ int is_udplite = IS_UDPLITE(sk);
+ __wsum csum = 0;
+
+ /* Grab the skbuff where UDP header space exists. */
+ if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
+ goto out;
+
+ /*
+ * Create a UDP header
+ */
+ uh = udp_hdr(skb);
+ uh->source = fl->fl_ip_sport;
+ uh->dest = fl->fl_ip_dport;
+ uh->len = htons(up->len);
+ uh->check = 0;
+
+ if (is_udplite)
+ csum = udplite_csum_outgoing(sk, skb);
+ else
+ csum = udp_csum_outgoing(sk, skb);
+
+ /* add protocol-dependent pseudo-header */
+ uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst,
+ up->len, fl->proto, csum );
+ if (uh->check == 0)
+ uh->check = CSUM_MANGLED_0;
+
+ err = ip6_push_pending_frames(sk);
+out:
+ up->len = 0;
+ up->pending = 0;
+ if (!err)
+ UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite);
+ return err;
+}
+
+int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t len)
+{
+ struct ipv6_txoptions opt_space;
+ struct udp_sock *up = udp_sk(sk);
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
+ struct in6_addr *daddr, *final_p = NULL, final;
+ struct ipv6_txoptions *opt = NULL;
+ struct ip6_flowlabel *flowlabel = NULL;
+ struct flowi fl;
+ struct dst_entry *dst;
+ int addr_len = msg->msg_namelen;
+ int ulen = len;
+ int hlimit = -1;
+ int tclass = -1;
+ int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
+ int err;
+ int connected = 0;
+ int is_udplite = IS_UDPLITE(sk);
+ int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
+
+ /* destination address check */
+ if (sin6) {
+ if (addr_len < offsetof(struct sockaddr, sa_data))
+ return -EINVAL;
+
+ switch (sin6->sin6_family) {
+ case AF_INET6:
+ if (addr_len < SIN6_LEN_RFC2133)
+ return -EINVAL;
+ daddr = &sin6->sin6_addr;
+ break;
+ case AF_INET:
+ goto do_udp_sendmsg;
+ case AF_UNSPEC:
+ msg->msg_name = sin6 = NULL;
+ msg->msg_namelen = addr_len = 0;
+ daddr = NULL;
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else if (!up->pending) {
+ if (sk->sk_state != TCP_ESTABLISHED)
+ return -EDESTADDRREQ;
+ daddr = &np->daddr;
+ } else
+ daddr = NULL;
+
+ if (daddr) {
+ if (ipv6_addr_v4mapped(daddr)) {
+ struct sockaddr_in sin;
+ sin.sin_family = AF_INET;
+ sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
+ sin.sin_addr.s_addr = daddr->s6_addr32[3];
+ msg->msg_name = &sin;
+ msg->msg_namelen = sizeof(sin);
+do_udp_sendmsg:
+ if (__ipv6_only_sock(sk))
+ return -ENETUNREACH;
+ return udp_sendmsg(iocb, sk, msg, len);
+ }
+ }
+
+ if (up->pending == AF_INET)
+ return udp_sendmsg(iocb, sk, msg, len);
+
+ /* Rough check on arithmetic overflow,
+ better check is made in ip6_append_data().
+ */
+ if (len > INT_MAX - sizeof(struct udphdr))
+ return -EMSGSIZE;
+
+ if (up->pending) {
+ /*
+ * There are pending frames.
+ * The socket lock must be held while it's corked.
+ */
+ lock_sock(sk);
+ if (likely(up->pending)) {
+ if (unlikely(up->pending != AF_INET6)) {
+ release_sock(sk);
+ return -EAFNOSUPPORT;
+ }
+ dst = NULL;
+ goto do_append_data;
+ }
+ release_sock(sk);
+ }
+ ulen += sizeof(struct udphdr);
+
+ memset(&fl, 0, sizeof(fl));
+
+ if (sin6) {
+ if (sin6->sin6_port == 0)
+ return -EINVAL;
+
+ fl.fl_ip_dport = sin6->sin6_port;
+ daddr = &sin6->sin6_addr;
+
+ if (np->sndflow) {
+ fl.fl6_flowlabel = sin6->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;
+ daddr = &flowlabel->dst;
+ }
+ }
+
+ /*
+ * Otherwise it will be difficult to maintain
+ * sk->sk_dst_cache.
+ */
+ if (sk->sk_state == TCP_ESTABLISHED &&
+ ipv6_addr_equal(daddr, &np->daddr))
+ daddr = &np->daddr;
+
+ if (addr_len >= sizeof(struct sockaddr_in6) &&
+ sin6->sin6_scope_id &&
+ ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
+ fl.oif = sin6->sin6_scope_id;
+ } else {
+ if (sk->sk_state != TCP_ESTABLISHED)
+ return -EDESTADDRREQ;
+
+ fl.fl_ip_dport = inet->dport;
+ daddr = &np->daddr;
+ fl.fl6_flowlabel = np->flow_label;
+ connected = 1;
+ }
+
+ if (!fl.oif)
+ fl.oif = sk->sk_bound_dev_if;
+
+ if (msg->msg_controllen) {
+ opt = &opt_space;
+ memset(opt, 0, sizeof(struct ipv6_txoptions));
+ opt->tot_len = sizeof(*opt);
+
+ err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
+ if (err < 0) {
+ fl6_sock_release(flowlabel);
+ return err;
+ }
+ if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
+ flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
+ if (flowlabel == NULL)
+ return -EINVAL;
+ }
+ if (!(opt->opt_nflen|opt->opt_flen))
+ opt = NULL;
+ connected = 0;
+ }
+ if (opt == NULL)
+ opt = np->opt;
+ if (flowlabel)
+ opt = fl6_merge_options(&opt_space, flowlabel, opt);
+ opt = ipv6_fixup_options(&opt_space, opt);
+
+ fl.proto = sk->sk_protocol;
+ ipv6_addr_copy(&fl.fl6_dst, daddr);
+ if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
+ ipv6_addr_copy(&fl.fl6_src, &np->saddr);
+ fl.fl_ip_sport = inet->sport;
+
+ /* merge ip6_build_xmit from ip6_output */
+ if (opt && opt->srcrt) {
+ struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
+ ipv6_addr_copy(&final, &fl.fl6_dst);
+ ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
+ final_p = &final;
+ connected = 0;
+ }
+
+ if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
+ fl.oif = np->mcast_oif;
+ connected = 0;
+ }
+
+ security_sk_classify_flow(sk, &fl);
+
+ err = ip6_sk_dst_lookup(sk, &dst, &fl);
+ if (err)
+ goto out;
+ if (final_p)
+ ipv6_addr_copy(&fl.fl6_dst, final_p);
+
+ if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
+ if (err == -EREMOTE)
+ err = ip6_dst_blackhole(sk, &dst, &fl);
+ if (err < 0)
+ goto out;
+ }
+
+ if (hlimit < 0) {
+ if (ipv6_addr_is_multicast(&fl.fl6_dst))
+ hlimit = np->mcast_hops;
+ else
+ hlimit = np->hop_limit;
+ if (hlimit < 0)
+ hlimit = dst_metric(dst, RTAX_HOPLIMIT);
+ if (hlimit < 0)
+ hlimit = ipv6_get_hoplimit(dst->dev);
+ }
+
+ if (tclass < 0) {
+ tclass = np->tclass;
+ if (tclass < 0)
+ tclass = 0;
+ }
+
+ if (msg->msg_flags&MSG_CONFIRM)
+ goto do_confirm;
+back_from_confirm:
+
+ lock_sock(sk);
+ if (unlikely(up->pending)) {
+ /* The socket is already corked while preparing it. */
+ /* ... which is an evident application bug. --ANK */
+ release_sock(sk);
+
+ LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
+ err = -EINVAL;
+ goto out;
+ }
+
+ up->pending = AF_INET6;
+
+do_append_data:
+ up->len += ulen;
+ getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
+ err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
+ sizeof(struct udphdr), hlimit, tclass, opt, &fl,
+ (struct rt6_info*)dst,
+ corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
+ if (err)
+ udp_v6_flush_pending_frames(sk);
+ else if (!corkreq)
+ err = udp_v6_push_pending_frames(sk);
+ else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
+ up->pending = 0;
+
+ if (dst) {
+ if (connected) {
+ ip6_dst_store(sk, dst,
+ ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
+ &np->daddr : NULL,
+#ifdef CONFIG_IPV6_SUBTREES
+ ipv6_addr_equal(&fl.fl6_src, &np->saddr) ?
+ &np->saddr :
+#endif
+ NULL);
+ } else {
+ dst_release(dst);
+ }
+ }
+
+ if (err > 0)
+ err = np->recverr ? net_xmit_errno(err) : 0;
+ release_sock(sk);
+out:
+ fl6_sock_release(flowlabel);
+ if (!err)
+ return len;
+ /*
+ * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
+ * ENOBUFS might not be good (it's not tunable per se), but otherwise
+ * we don't have a good statistic (IpOutDiscards but it can be too many
+ * things). We could add another new stat but at least for now that
+ * seems like overkill.
+ */
+ if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
+ UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite);
+ }
+ return err;
+
+do_confirm:
+ dst_confirm(dst);
+ if (!(msg->msg_flags&MSG_PROBE) || len)
+ goto back_from_confirm;
+ err = 0;
+ goto out;
+}
+
+int udpv6_destroy_sock(struct sock *sk)
+{
+ lock_sock(sk);
+ udp_v6_flush_pending_frames(sk);
+ release_sock(sk);
+
+ inet6_destroy_sock(sk);
+
+ return 0;
+}
+
+/*
+ * Socket option code for UDP
+ */
+int udpv6_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int optlen)
+{
+ if (IS_SOL_UDPFAMILY(level))
+ return udp_lib_setsockopt(sk, level, optname, optval, optlen,
+ udp_v6_push_pending_frames);
+ return ipv6_setsockopt(sk, level, optname, optval, optlen);
+}
+
+#ifdef CONFIG_COMPAT
+int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int optlen)
+{
+ if (IS_SOL_UDPFAMILY(level))
+ return udp_lib_setsockopt(sk, level, optname, optval, optlen,
+ udp_v6_push_pending_frames);
+ return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
+}
+#endif
+
+int udpv6_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ if (IS_SOL_UDPFAMILY(level))
+ return udp_lib_getsockopt(sk, level, optname, optval, optlen);
+ return ipv6_getsockopt(sk, level, optname, optval, optlen);
+}
+
+#ifdef CONFIG_COMPAT
+int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ if (IS_SOL_UDPFAMILY(level))
+ return udp_lib_getsockopt(sk, level, optname, optval, optlen);
+ return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
+}
+#endif
+
+static struct inet6_protocol udpv6_protocol = {
+ .handler = udpv6_rcv,
+ .err_handler = udpv6_err,
+ .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
+};
+
+/* ------------------------------------------------------------------------ */
+#ifdef CONFIG_PROC_FS
+
+static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket)
+{
+ struct inet_sock *inet = inet_sk(sp);
+ struct ipv6_pinfo *np = inet6_sk(sp);
+ struct in6_addr *dest, *src;
+ __u16 destp, srcp;
+
+ dest = &np->daddr;
+ src = &np->rcv_saddr;
+ destp = ntohs(inet->dport);
+ srcp = ntohs(inet->sport);
+ seq_printf(seq,
+ "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
+ "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
+ bucket,
+ src->s6_addr32[0], src->s6_addr32[1],
+ src->s6_addr32[2], src->s6_addr32[3], srcp,
+ dest->s6_addr32[0], dest->s6_addr32[1],
+ dest->s6_addr32[2], dest->s6_addr32[3], destp,
+ sp->sk_state,
+ atomic_read(&sp->sk_wmem_alloc),
+ atomic_read(&sp->sk_rmem_alloc),
+ 0, 0L, 0,
+ sock_i_uid(sp), 0,
+ sock_i_ino(sp),
+ atomic_read(&sp->sk_refcnt), sp);
+}
+
+int udp6_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == SEQ_START_TOKEN)
+ seq_printf(seq,
+ " sl "
+ "local_address "
+ "remote_address "
+ "st tx_queue rx_queue tr tm->when retrnsmt"
+ " uid timeout inode\n");
+ else
+ udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket);
+ return 0;
+}
+
+static struct file_operations udp6_seq_fops;
+static struct udp_seq_afinfo udp6_seq_afinfo = {
+ .owner = THIS_MODULE,
+ .name = "udp6",
+ .family = AF_INET6,
+ .hashtable = udp_hash,
+ .seq_show = udp6_seq_show,
+ .seq_fops = &udp6_seq_fops,
+};
+
+int __init udp6_proc_init(void)
+{
+ return udp_proc_register(&udp6_seq_afinfo);
+}
+
+void udp6_proc_exit(void) {
+ udp_proc_unregister(&udp6_seq_afinfo);
+}
+#endif /* CONFIG_PROC_FS */
+
+/* ------------------------------------------------------------------------ */
+
+DEFINE_PROTO_INUSE(udpv6)
+
+struct proto udpv6_prot = {
+ .name = "UDPv6",
+ .owner = THIS_MODULE,
+ .close = udp_lib_close,
+ .connect = ip6_datagram_connect,
+ .disconnect = udp_disconnect,
+ .ioctl = udp_ioctl,
+ .destroy = udpv6_destroy_sock,
+ .setsockopt = udpv6_setsockopt,
+ .getsockopt = udpv6_getsockopt,
+ .sendmsg = udpv6_sendmsg,
+ .recvmsg = udpv6_recvmsg,
+ .backlog_rcv = udpv6_queue_rcv_skb,
+ .hash = udp_lib_hash,
+ .unhash = udp_lib_unhash,
+ .get_port = udp_v6_get_port,
+ .memory_allocated = &udp_memory_allocated,
+ .sysctl_mem = sysctl_udp_mem,
+ .sysctl_wmem = &sysctl_udp_wmem_min,
+ .sysctl_rmem = &sysctl_udp_rmem_min,
+ .obj_size = sizeof(struct udp6_sock),
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_udpv6_setsockopt,
+ .compat_getsockopt = compat_udpv6_getsockopt,
+#endif
+ REF_PROTO_INUSE(udpv6)
+};
+
+static struct inet_protosw udpv6_protosw = {
+ .type = SOCK_DGRAM,
+ .protocol = IPPROTO_UDP,
+ .prot = &udpv6_prot,
+ .ops = &inet6_dgram_ops,
+ .capability =-1,
+ .no_check = UDP_CSUM_DEFAULT,
+ .flags = INET_PROTOSW_PERMANENT,
+};
+
+
+int __init udpv6_init(void)
+{
+ int ret;
+
+ ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP);
+ if (ret)
+ goto out;
+
+ ret = inet6_register_protosw(&udpv6_protosw);
+ if (ret)
+ goto out_udpv6_protocol;
+out:
+ return ret;
+
+out_udpv6_protocol:
+ inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
+ goto out;
+}
+
+void udpv6_exit(void)
+{
+ inet6_unregister_protosw(&udpv6_protosw);
+ inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
+}
+++ /dev/null
-/*
- * UDPLITEv6 An implementation of the UDP-Lite protocol over IPv6.
- * See also net/ipv4/udplite.c
- *
- * Version: $Id: udplite.c,v 1.9 2006/10/19 08:28:10 gerrit Exp $
- *
- * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
- *
- * Changes:
- * Fixes:
- * 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 "udp_impl.h"
-
-DEFINE_SNMP_STAT(struct udp_mib, udplite_stats_in6) __read_mostly;
-
-static int udplitev6_rcv(struct sk_buff *skb)
-{
- return __udp6_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
-}
-
-static void udplitev6_err(struct sk_buff *skb,
- struct inet6_skb_parm *opt,
- int type, int code, int offset, __be32 info)
-{
- __udp6_lib_err(skb, opt, type, code, offset, info, udplite_hash);
-}
-
-static struct inet6_protocol udplitev6_protocol = {
- .handler = udplitev6_rcv,
- .err_handler = udplitev6_err,
- .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
-};
-
-static int udplite_v6_get_port(struct sock *sk, unsigned short snum)
-{
- return udplite_get_port(sk, snum, ipv6_rcv_saddr_equal);
-}
-
-DEFINE_PROTO_INUSE(udplitev6)
-
-struct proto udplitev6_prot = {
- .name = "UDPLITEv6",
- .owner = THIS_MODULE,
- .close = udp_lib_close,
- .connect = ip6_datagram_connect,
- .disconnect = udp_disconnect,
- .ioctl = udp_ioctl,
- .init = udplite_sk_init,
- .destroy = udpv6_destroy_sock,
- .setsockopt = udpv6_setsockopt,
- .getsockopt = udpv6_getsockopt,
- .sendmsg = udpv6_sendmsg,
- .recvmsg = udpv6_recvmsg,
- .backlog_rcv = udpv6_queue_rcv_skb,
- .hash = udp_lib_hash,
- .unhash = udp_lib_unhash,
- .get_port = udplite_v6_get_port,
- .obj_size = sizeof(struct udp6_sock),
-#ifdef CONFIG_COMPAT
- .compat_setsockopt = compat_udpv6_setsockopt,
- .compat_getsockopt = compat_udpv6_getsockopt,
-#endif
- REF_PROTO_INUSE(udplitev6)
-};
-
-static struct inet_protosw udplite6_protosw = {
- .type = SOCK_DGRAM,
- .protocol = IPPROTO_UDPLITE,
- .prot = &udplitev6_prot,
- .ops = &inet6_dgram_ops,
- .capability = -1,
- .no_check = 0,
- .flags = INET_PROTOSW_PERMANENT,
-};
-
-int __init udplitev6_init(void)
-{
- int ret;
-
- ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
- if (ret)
- goto out;
-
- ret = inet6_register_protosw(&udplite6_protosw);
- if (ret)
- goto out_udplitev6_protocol;
-out:
- return ret;
-
-out_udplitev6_protocol:
- inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
- goto out;
-}
-
-void udplitev6_exit(void)
-{
- inet6_unregister_protosw(&udplite6_protosw);
- inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
-}
-
-#ifdef CONFIG_PROC_FS
-static struct file_operations udplite6_seq_fops;
-static struct udp_seq_afinfo udplite6_seq_afinfo = {
- .owner = THIS_MODULE,
- .name = "udplite6",
- .family = AF_INET6,
- .hashtable = udplite_hash,
- .seq_show = udp6_seq_show,
- .seq_fops = &udplite6_seq_fops,
-};
-
-int __init udplite6_proc_init(void)
-{
- return udp_proc_register(&udplite6_seq_afinfo);
-}
-
-void udplite6_proc_exit(void)
-{
- udp_proc_unregister(&udplite6_seq_afinfo);
-}
-#endif
--- /dev/null
+/*
+ * UDPLITEv6 An implementation of the UDP-Lite protocol over IPv6.
+ * See also net/ipv4/udplite.c
+ *
+ * Version: $Id: udplite.c,v 1.9 2006/10/19 08:28:10 gerrit Exp $
+ *
+ * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
+ *
+ * Changes:
+ * Fixes:
+ * 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 "udp_impl.h"
+
+DEFINE_SNMP_STAT(struct udp_mib, udplite_stats_in6) __read_mostly;
+
+static int udplitev6_rcv(struct sk_buff *skb)
+{
+ return __udp6_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
+}
+
+static void udplitev6_err(struct sk_buff *skb,
+ struct inet6_skb_parm *opt,
+ int type, int code, int offset, __be32 info)
+{
+ __udp6_lib_err(skb, opt, type, code, offset, info, udplite_hash);
+}
+
+static struct inet6_protocol udplitev6_protocol = {
+ .handler = udplitev6_rcv,
+ .err_handler = udplitev6_err,
+ .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
+};
+
+static int udplite_v6_get_port(struct sock *sk, unsigned short snum)
+{
+ return udplite_get_port(sk, snum, ipv6_rcv_saddr_equal);
+}
+
+DEFINE_PROTO_INUSE(udplitev6)
+
+struct proto udplitev6_prot = {
+ .name = "UDPLITEv6",
+ .owner = THIS_MODULE,
+ .close = udp_lib_close,
+ .connect = ip6_datagram_connect,
+ .disconnect = udp_disconnect,
+ .ioctl = udp_ioctl,
+ .init = udplite_sk_init,
+ .destroy = udpv6_destroy_sock,
+ .setsockopt = udpv6_setsockopt,
+ .getsockopt = udpv6_getsockopt,
+ .sendmsg = udpv6_sendmsg,
+ .recvmsg = udpv6_recvmsg,
+ .backlog_rcv = udpv6_queue_rcv_skb,
+ .hash = udp_lib_hash,
+ .unhash = udp_lib_unhash,
+ .get_port = udplite_v6_get_port,
+ .obj_size = sizeof(struct udp6_sock),
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_udpv6_setsockopt,
+ .compat_getsockopt = compat_udpv6_getsockopt,
+#endif
+ REF_PROTO_INUSE(udplitev6)
+};
+
+static struct inet_protosw udplite6_protosw = {
+ .type = SOCK_DGRAM,
+ .protocol = IPPROTO_UDPLITE,
+ .prot = &udplitev6_prot,
+ .ops = &inet6_dgram_ops,
+ .capability = -1,
+ .no_check = 0,
+ .flags = INET_PROTOSW_PERMANENT,
+};
+
+int __init udplitev6_init(void)
+{
+ int ret;
+
+ ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
+ if (ret)
+ goto out;
+
+ ret = inet6_register_protosw(&udplite6_protosw);
+ if (ret)
+ goto out_udplitev6_protocol;
+out:
+ return ret;
+
+out_udplitev6_protocol:
+ inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
+ goto out;
+}
+
+void udplitev6_exit(void)
+{
+ inet6_unregister_protosw(&udplite6_protosw);
+ inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
+}
+
+#ifdef CONFIG_PROC_FS
+static struct file_operations udplite6_seq_fops;
+static struct udp_seq_afinfo udplite6_seq_afinfo = {
+ .owner = THIS_MODULE,
+ .name = "udplite6",
+ .family = AF_INET6,
+ .hashtable = udplite_hash,
+ .seq_show = udp6_seq_show,
+ .seq_fops = &udplite6_seq_fops,
+};
+
+int __init udplite6_proc_init(void)
+{
+ return udp_proc_register(&udplite6_seq_afinfo);
+}
+
+void udplite6_proc_exit(void)
+{
+ udp_proc_unregister(&udplite6_seq_afinfo);
+}
+#endif
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff