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-rw-r--r--net/ipv6/raw.c1157
1 files changed, 1157 insertions, 0 deletions
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
new file mode 100644
index 000000000000..5488ad0de4f6
--- /dev/null
+++ b/net/ipv6/raw.c
@@ -0,0 +1,1157 @@
+/*
+ * RAW sockets for IPv6
+ * Linux INET6 implementation
+ *
+ * Authors:
+ * Pedro Roque <roque@di.fc.ul.pt>
+ *
+ * Adapted from linux/net/ipv4/raw.c
+ *
+ * $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $
+ *
+ * Fixes:
+ * Hideaki YOSHIFUJI : sin6_scope_id support
+ * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
+ * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
+ *
+ * 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/sched.h>
+#include <linux/net.h>
+#include <linux/in6.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/icmpv6.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+#include <asm/uaccess.h>
+#include <asm/ioctls.h>
+
+#include <net/ip.h>
+#include <net/sock.h>
+#include <net/snmp.h>
+
+#include <net/ipv6.h>
+#include <net/ndisc.h>
+#include <net/protocol.h>
+#include <net/ip6_route.h>
+#include <net/ip6_checksum.h>
+#include <net/addrconf.h>
+#include <net/transp_v6.h>
+#include <net/udp.h>
+#include <net/inet_common.h>
+
+#include <net/rawv6.h>
+#include <net/xfrm.h>
+
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
+DEFINE_RWLOCK(raw_v6_lock);
+
+static void raw_v6_hash(struct sock *sk)
+{
+ struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num &
+ (RAWV6_HTABLE_SIZE - 1)];
+
+ write_lock_bh(&raw_v6_lock);
+ sk_add_node(sk, list);
+ sock_prot_inc_use(sk->sk_prot);
+ write_unlock_bh(&raw_v6_lock);
+}
+
+static void raw_v6_unhash(struct sock *sk)
+{
+ write_lock_bh(&raw_v6_lock);
+ if (sk_del_node_init(sk))
+ sock_prot_dec_use(sk->sk_prot);
+ write_unlock_bh(&raw_v6_lock);
+}
+
+
+/* Grumble... icmp and ip_input want to get at this... */
+struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
+ struct in6_addr *loc_addr, struct in6_addr *rmt_addr)
+{
+ struct hlist_node *node;
+ int is_multicast = ipv6_addr_is_multicast(loc_addr);
+
+ sk_for_each_from(sk, node)
+ if (inet_sk(sk)->num == num) {
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ if (!ipv6_addr_any(&np->daddr) &&
+ !ipv6_addr_equal(&np->daddr, rmt_addr))
+ continue;
+
+ if (!ipv6_addr_any(&np->rcv_saddr)) {
+ if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
+ goto found;
+ if (is_multicast &&
+ inet6_mc_check(sk, loc_addr, rmt_addr))
+ goto found;
+ continue;
+ }
+ goto found;
+ }
+ sk = NULL;
+found:
+ return sk;
+}
+
+/*
+ * 0 - deliver
+ * 1 - block
+ */
+static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
+{
+ struct icmp6hdr *icmph;
+ struct raw6_sock *rp = raw6_sk(sk);
+
+ if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
+ __u32 *data = &rp->filter.data[0];
+ int bit_nr;
+
+ icmph = (struct icmp6hdr *) skb->data;
+ bit_nr = icmph->icmp6_type;
+
+ return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
+ }
+ return 0;
+}
+
+/*
+ * demultiplex raw sockets.
+ * (should consider queueing the skb in the sock receive_queue
+ * without calling rawv6.c)
+ *
+ * Caller owns SKB so we must make clones.
+ */
+void ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
+{
+ struct in6_addr *saddr;
+ struct in6_addr *daddr;
+ struct sock *sk;
+ __u8 hash;
+
+ saddr = &skb->nh.ipv6h->saddr;
+ daddr = saddr + 1;
+
+ hash = nexthdr & (MAX_INET_PROTOS - 1);
+
+ read_lock(&raw_v6_lock);
+ sk = sk_head(&raw_v6_htable[hash]);
+
+ /*
+ * The first socket found will be delivered after
+ * delivery to transport protocols.
+ */
+
+ if (sk == NULL)
+ goto out;
+
+ sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr);
+
+ while (sk) {
+ if (nexthdr != IPPROTO_ICMPV6 || !icmpv6_filter(sk, skb)) {
+ struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
+
+ /* Not releasing hash table! */
+ if (clone)
+ rawv6_rcv(sk, clone);
+ }
+ sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr);
+ }
+out:
+ read_unlock(&raw_v6_lock);
+}
+
+/* This cleans up af_inet6 a bit. -DaveM */
+static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
+ __u32 v4addr = 0;
+ int addr_type;
+ int err;
+
+ if (addr_len < SIN6_LEN_RFC2133)
+ return -EINVAL;
+ addr_type = ipv6_addr_type(&addr->sin6_addr);
+
+ /* Raw sockets are IPv6 only */
+ if (addr_type == IPV6_ADDR_MAPPED)
+ return(-EADDRNOTAVAIL);
+
+ lock_sock(sk);
+
+ err = -EINVAL;
+ if (sk->sk_state != TCP_CLOSE)
+ goto out;
+
+ /* Check if the address belongs to the host. */
+ if (addr_type != IPV6_ADDR_ANY) {
+ struct net_device *dev = NULL;
+
+ if (addr_type & IPV6_ADDR_LINKLOCAL) {
+ if (addr_len >= sizeof(struct sockaddr_in6) &&
+ addr->sin6_scope_id) {
+ /* Override any existing binding, if another
+ * one is supplied by user.
+ */
+ sk->sk_bound_dev_if = addr->sin6_scope_id;
+ }
+
+ /* Binding to link-local address requires an interface */
+ if (!sk->sk_bound_dev_if)
+ goto out;
+
+ dev = dev_get_by_index(sk->sk_bound_dev_if);
+ if (!dev) {
+ err = -ENODEV;
+ goto out;
+ }
+ }
+
+ /* ipv4 addr of the socket is invalid. Only the
+ * unspecified and mapped address have a v4 equivalent.
+ */
+ v4addr = LOOPBACK4_IPV6;
+ if (!(addr_type & IPV6_ADDR_MULTICAST)) {
+ err = -EADDRNOTAVAIL;
+ if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
+ if (dev)
+ dev_put(dev);
+ goto out;
+ }
+ }
+ if (dev)
+ dev_put(dev);
+ }
+
+ inet->rcv_saddr = inet->saddr = v4addr;
+ ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
+ if (!(addr_type & IPV6_ADDR_MULTICAST))
+ ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
+ err = 0;
+out:
+ release_sock(sk);
+ return err;
+}
+
+void rawv6_err(struct sock *sk, struct sk_buff *skb,
+ struct inet6_skb_parm *opt,
+ int type, int code, int offset, u32 info)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ int err;
+ int harderr;
+
+ /* Report error on raw socket, if:
+ 1. User requested recverr.
+ 2. Socket is connected (otherwise the error indication
+ is useless without recverr and error is hard.
+ */
+ if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
+ return;
+
+ harderr = icmpv6_err_convert(type, code, &err);
+ if (type == ICMPV6_PKT_TOOBIG)
+ harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
+
+ if (np->recverr) {
+ u8 *payload = skb->data;
+ if (!inet->hdrincl)
+ payload += offset;
+ ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
+ }
+
+ if (np->recverr || harderr) {
+ sk->sk_err = err;
+ sk->sk_error_report(sk);
+ }
+}
+
+static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
+{
+ if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
+ skb->ip_summed != CHECKSUM_UNNECESSARY) {
+ if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) {
+ /* FIXME: increment a raw6 drops counter here */
+ kfree_skb(skb);
+ return 0;
+ }
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ }
+
+ /* Charge it to the socket. */
+ if (sock_queue_rcv_skb(sk,skb)<0) {
+ /* FIXME: increment a raw6 drops counter here */
+ kfree_skb(skb);
+ return 0;
+ }
+
+ return 0;
+}
+
+/*
+ * This is next to useless...
+ * if we demultiplex in network layer we don't need the extra call
+ * just to queue the skb...
+ * maybe we could have the network decide upon a hint if it
+ * should call raw_rcv for demultiplexing
+ */
+int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ struct raw6_sock *rp = raw6_sk(sk);
+
+ if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
+ kfree_skb(skb);
+ return NET_RX_DROP;
+ }
+
+ if (!rp->checksum)
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ if (skb->ip_summed != CHECKSUM_UNNECESSARY) {
+ if (skb->ip_summed == CHECKSUM_HW) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ if (csum_ipv6_magic(&skb->nh.ipv6h->saddr,
+ &skb->nh.ipv6h->daddr,
+ skb->len, inet->num, skb->csum)) {
+ LIMIT_NETDEBUG(
+ printk(KERN_DEBUG "raw v6 hw csum failure.\n"));
+ skb->ip_summed = CHECKSUM_NONE;
+ }
+ }
+ if (skb->ip_summed == CHECKSUM_NONE)
+ skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
+ &skb->nh.ipv6h->daddr,
+ skb->len, inet->num, 0);
+ }
+
+ if (inet->hdrincl) {
+ if (skb->ip_summed != CHECKSUM_UNNECESSARY &&
+ (unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) {
+ /* FIXME: increment a raw6 drops counter here */
+ kfree_skb(skb);
+ return 0;
+ }
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ }
+
+ rawv6_rcv_skb(sk, skb);
+ return 0;
+}
+
+
+/*
+ * This should be easy, if there is something there
+ * we return it, otherwise we block.
+ */
+
+static int rawv6_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 sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
+ struct sk_buff *skb;
+ size_t copied;
+ int err;
+
+ if (flags & MSG_OOB)
+ return -EOPNOTSUPP;
+
+ if (addr_len)
+ *addr_len=sizeof(*sin6);
+
+ if (flags & MSG_ERRQUEUE)
+ return ipv6_recv_error(sk, msg, len);
+
+ skb = skb_recv_datagram(sk, flags, noblock, &err);
+ if (!skb)
+ goto out;
+
+ copied = skb->len;
+ if (copied > len) {
+ copied = len;
+ msg->msg_flags |= MSG_TRUNC;
+ }
+
+ if (skb->ip_summed==CHECKSUM_UNNECESSARY) {
+ err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ } else if (msg->msg_flags&MSG_TRUNC) {
+ if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum)))
+ goto csum_copy_err;
+ err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ } else {
+ err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
+ if (err == -EINVAL)
+ goto csum_copy_err;
+ }
+ if (err)
+ goto out_free;
+
+ /* Copy the address. */
+ if (sin6) {
+ sin6->sin6_family = AF_INET6;
+ ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
+ sin6->sin6_flowinfo = 0;
+ sin6->sin6_scope_id = 0;
+ if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
+ sin6->sin6_scope_id = IP6CB(skb)->iif;
+ }
+
+ sock_recv_timestamp(msg, sk, skb);
+
+ if (np->rxopt.all)
+ datagram_recv_ctl(sk, msg, skb);
+
+ err = copied;
+ if (flags & MSG_TRUNC)
+ err = skb->len;
+
+out_free:
+ skb_free_datagram(sk, skb);
+out:
+ return err;
+
+csum_copy_err:
+ /* Clear queue. */
+ if (flags&MSG_PEEK) {
+ int clear = 0;
+ spin_lock_irq(&sk->sk_receive_queue.lock);
+ if (skb == skb_peek(&sk->sk_receive_queue)) {
+ __skb_unlink(skb, &sk->sk_receive_queue);
+ clear = 1;
+ }
+ spin_unlock_irq(&sk->sk_receive_queue.lock);
+ if (clear)
+ kfree_skb(skb);
+ }
+
+ /* Error for blocking case is chosen to masquerade
+ as some normal condition.
+ */
+ err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
+ /* FIXME: increment a raw6 drops counter here */
+ goto out_free;
+}
+
+static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
+ struct raw6_sock *rp, int len)
+{
+ struct sk_buff *skb;
+ int err = 0;
+ u16 *csum;
+ u32 tmp_csum;
+
+ if (!rp->checksum)
+ goto send;
+
+ if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
+ goto out;
+
+ if (rp->offset + 1 < len)
+ csum = (u16 *)(skb->h.raw + rp->offset);
+ else {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* should be check HW csum miyazawa */
+ if (skb_queue_len(&sk->sk_write_queue) == 1) {
+ /*
+ * Only one fragment on the socket.
+ */
+ tmp_csum = skb->csum;
+ } else {
+ tmp_csum = 0;
+
+ skb_queue_walk(&sk->sk_write_queue, skb) {
+ tmp_csum = csum_add(tmp_csum, skb->csum);
+ }
+ }
+
+ /* in case cksum was not initialized */
+ if (unlikely(*csum))
+ tmp_csum = csum_sub(tmp_csum, *csum);
+
+ *csum = csum_ipv6_magic(&fl->fl6_src,
+ &fl->fl6_dst,
+ len, fl->proto, tmp_csum);
+
+ if (*csum == 0)
+ *csum = -1;
+send:
+ err = ip6_push_pending_frames(sk);
+out:
+ return err;
+}
+
+static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
+ struct flowi *fl, struct rt6_info *rt,
+ unsigned int flags)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6hdr *iph;
+ struct sk_buff *skb;
+ unsigned int hh_len;
+ int err;
+
+ if (length > rt->u.dst.dev->mtu) {
+ ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
+ return -EMSGSIZE;
+ }
+ if (flags&MSG_PROBE)
+ goto out;
+
+ hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
+
+ skb = sock_alloc_send_skb(sk, length+hh_len+15,
+ flags&MSG_DONTWAIT, &err);
+ if (skb == NULL)
+ goto error;
+ skb_reserve(skb, hh_len);
+
+ skb->priority = sk->sk_priority;
+ skb->dst = dst_clone(&rt->u.dst);
+
+ skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length);
+
+ skb->ip_summed = CHECKSUM_NONE;
+
+ skb->h.raw = skb->nh.raw;
+ err = memcpy_fromiovecend((void *)iph, from, 0, length);
+ if (err)
+ goto error_fault;
+
+ IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
+ err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
+ dst_output);
+ if (err > 0)
+ err = inet->recverr ? net_xmit_errno(err) : 0;
+ if (err)
+ goto error;
+out:
+ return 0;
+
+error_fault:
+ err = -EFAULT;
+ kfree_skb(skb);
+error:
+ IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+ return err;
+}
+
+static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
+{
+ struct iovec *iov;
+ u8 __user *type = NULL;
+ u8 __user *code = NULL;
+ int probed = 0;
+ int i;
+
+ if (!msg->msg_iov)
+ return;
+
+ for (i = 0; i < msg->msg_iovlen; i++) {
+ iov = &msg->msg_iov[i];
+ if (!iov)
+ continue;
+
+ switch (fl->proto) {
+ case IPPROTO_ICMPV6:
+ /* check if one-byte field is readable or not. */
+ if (iov->iov_base && iov->iov_len < 1)
+ break;
+
+ if (!type) {
+ type = iov->iov_base;
+ /* check if code field is readable or not. */
+ if (iov->iov_len > 1)
+ code = type + 1;
+ } else if (!code)
+ code = iov->iov_base;
+
+ if (type && code) {
+ get_user(fl->fl_icmp_type, type);
+ __get_user(fl->fl_icmp_code, code);
+ probed = 1;
+ }
+ break;
+ default:
+ probed = 1;
+ break;
+ }
+ if (probed)
+ break;
+ }
+}
+
+static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t len)
+{
+ struct ipv6_txoptions opt_space;
+ struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
+ struct in6_addr *daddr, *final_p = NULL, final;
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct raw6_sock *rp = raw6_sk(sk);
+ struct ipv6_txoptions *opt = NULL;
+ struct ip6_flowlabel *flowlabel = NULL;
+ struct dst_entry *dst = NULL;
+ struct flowi fl;
+ int addr_len = msg->msg_namelen;
+ int hlimit = -1;
+ u16 proto;
+ int err;
+
+ /* Rough check on arithmetic overflow,
+ better check is made in ip6_build_xmit
+ */
+ if (len < 0)
+ return -EMSGSIZE;
+
+ /* Mirror BSD error message compatibility */
+ if (msg->msg_flags & MSG_OOB)
+ return -EOPNOTSUPP;
+
+ /*
+ * Get and verify the address.
+ */
+ memset(&fl, 0, sizeof(fl));
+
+ if (sin6) {
+ if (addr_len < SIN6_LEN_RFC2133)
+ return -EINVAL;
+
+ if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
+ return(-EAFNOSUPPORT);
+
+ /* port is the proto value [0..255] carried in nexthdr */
+ proto = ntohs(sin6->sin6_port);
+
+ if (!proto)
+ proto = inet->num;
+ else if (proto != inet->num)
+ return(-EINVAL);
+
+ if (proto > 255)
+ return(-EINVAL);
+
+ 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;
+
+ proto = inet->num;
+ daddr = &np->daddr;
+ fl.fl6_flowlabel = np->flow_label;
+ }
+
+ if (ipv6_addr_any(daddr)) {
+ /*
+ * unspecified destination address
+ * treated as error... is this correct ?
+ */
+ fl6_sock_release(flowlabel);
+ return(-EINVAL);
+ }
+
+ if (fl.oif == 0)
+ 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(struct ipv6_txoptions);
+
+ err = datagram_send_ctl(msg, &fl, opt, &hlimit);
+ 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;
+ }
+ if (opt == NULL)
+ opt = np->opt;
+ if (flowlabel)
+ opt = fl6_merge_options(&opt_space, flowlabel, opt);
+
+ fl.proto = proto;
+ rawv6_probe_proto_opt(&fl, msg);
+
+ 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);
+
+ /* 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;
+ }
+
+ if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
+ fl.oif = np->mcast_oif;
+
+ err = ip6_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, 0)) < 0) {
+ dst_release(dst);
+ 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 (msg->msg_flags&MSG_CONFIRM)
+ goto do_confirm;
+
+back_from_confirm:
+ if (inet->hdrincl) {
+ err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
+ } else {
+ lock_sock(sk);
+ err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
+ hlimit, opt, &fl, (struct rt6_info*)dst, msg->msg_flags);
+
+ if (err)
+ ip6_flush_pending_frames(sk);
+ else if (!(msg->msg_flags & MSG_MORE))
+ err = rawv6_push_pending_frames(sk, &fl, rp, len);
+ }
+done:
+ ip6_dst_store(sk, dst,
+ ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
+ &np->daddr : NULL);
+ if (err > 0)
+ err = np->recverr ? net_xmit_errno(err) : 0;
+
+ release_sock(sk);
+out:
+ fl6_sock_release(flowlabel);
+ return err<0?err:len;
+do_confirm:
+ dst_confirm(dst);
+ if (!(msg->msg_flags & MSG_PROBE) || len)
+ goto back_from_confirm;
+ err = 0;
+ goto done;
+}
+
+static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
+ char __user *optval, int optlen)
+{
+ switch (optname) {
+ case ICMPV6_FILTER:
+ if (optlen > sizeof(struct icmp6_filter))
+ optlen = sizeof(struct icmp6_filter);
+ if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
+ return -EFAULT;
+ return 0;
+ default:
+ return -ENOPROTOOPT;
+ };
+
+ return 0;
+}
+
+static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ int len;
+
+ switch (optname) {
+ case ICMPV6_FILTER:
+ if (get_user(len, optlen))
+ return -EFAULT;
+ if (len < 0)
+ return -EINVAL;
+ if (len > sizeof(struct icmp6_filter))
+ len = sizeof(struct icmp6_filter);
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
+ return -EFAULT;
+ return 0;
+ default:
+ return -ENOPROTOOPT;
+ };
+
+ return 0;
+}
+
+
+static int rawv6_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct raw6_sock *rp = raw6_sk(sk);
+ int val;
+
+ switch(level) {
+ case SOL_RAW:
+ break;
+
+ case SOL_ICMPV6:
+ if (inet_sk(sk)->num != IPPROTO_ICMPV6)
+ return -EOPNOTSUPP;
+ return rawv6_seticmpfilter(sk, level, optname, optval,
+ optlen);
+ case SOL_IPV6:
+ if (optname == IPV6_CHECKSUM)
+ break;
+ default:
+ return ipv6_setsockopt(sk, level, optname, optval,
+ optlen);
+ };
+
+ if (get_user(val, (int __user *)optval))
+ return -EFAULT;
+
+ switch (optname) {
+ case IPV6_CHECKSUM:
+ /* You may get strange result with a positive odd offset;
+ RFC2292bis agrees with me. */
+ if (val > 0 && (val&1))
+ return(-EINVAL);
+ if (val < 0) {
+ rp->checksum = 0;
+ } else {
+ rp->checksum = 1;
+ rp->offset = val;
+ }
+
+ return 0;
+ break;
+
+ default:
+ return(-ENOPROTOOPT);
+ }
+}
+
+static int rawv6_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct raw6_sock *rp = raw6_sk(sk);
+ int val, len;
+
+ switch(level) {
+ case SOL_RAW:
+ break;
+
+ case SOL_ICMPV6:
+ if (inet_sk(sk)->num != IPPROTO_ICMPV6)
+ return -EOPNOTSUPP;
+ return rawv6_geticmpfilter(sk, level, optname, optval,
+ optlen);
+ case SOL_IPV6:
+ if (optname == IPV6_CHECKSUM)
+ break;
+ default:
+ return ipv6_getsockopt(sk, level, optname, optval,
+ optlen);
+ };
+
+ if (get_user(len,optlen))
+ return -EFAULT;
+
+ switch (optname) {
+ case IPV6_CHECKSUM:
+ if (rp->checksum == 0)
+ val = -1;
+ else
+ val = rp->offset;
+ break;
+
+ default:
+ return -ENOPROTOOPT;
+ }
+
+ len = min_t(unsigned int, sizeof(int), len);
+
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval,&val,len))
+ return -EFAULT;
+ return 0;
+}
+
+static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
+{
+ switch(cmd) {
+ case SIOCOUTQ:
+ {
+ int amount = atomic_read(&sk->sk_wmem_alloc);
+ return put_user(amount, (int __user *)arg);
+ }
+ case SIOCINQ:
+ {
+ struct sk_buff *skb;
+ int amount = 0;
+
+ spin_lock_irq(&sk->sk_receive_queue.lock);
+ skb = skb_peek(&sk->sk_receive_queue);
+ if (skb != NULL)
+ amount = skb->tail - skb->h.raw;
+ spin_unlock_irq(&sk->sk_receive_queue.lock);
+ return put_user(amount, (int __user *)arg);
+ }
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+static void rawv6_close(struct sock *sk, long timeout)
+{
+ if (inet_sk(sk)->num == IPPROTO_RAW)
+ ip6_ra_control(sk, -1, NULL);
+
+ sk_common_release(sk);
+}
+
+static int rawv6_init_sk(struct sock *sk)
+{
+ if (inet_sk(sk)->num == IPPROTO_ICMPV6) {
+ struct raw6_sock *rp = raw6_sk(sk);
+ rp->checksum = 1;
+ rp->offset = 2;
+ }
+ return(0);
+}
+
+struct proto rawv6_prot = {
+ .name = "RAWv6",
+ .owner = THIS_MODULE,
+ .close = rawv6_close,
+ .connect = ip6_datagram_connect,
+ .disconnect = udp_disconnect,
+ .ioctl = rawv6_ioctl,
+ .init = rawv6_init_sk,
+ .destroy = inet6_destroy_sock,
+ .setsockopt = rawv6_setsockopt,
+ .getsockopt = rawv6_getsockopt,
+ .sendmsg = rawv6_sendmsg,
+ .recvmsg = rawv6_recvmsg,
+ .bind = rawv6_bind,
+ .backlog_rcv = rawv6_rcv_skb,
+ .hash = raw_v6_hash,
+ .unhash = raw_v6_unhash,
+ .obj_size = sizeof(struct raw6_sock),
+};
+
+#ifdef CONFIG_PROC_FS
+struct raw6_iter_state {
+ int bucket;
+};
+
+#define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
+
+static struct sock *raw6_get_first(struct seq_file *seq)
+{
+ struct sock *sk;
+ struct hlist_node *node;
+ struct raw6_iter_state* state = raw6_seq_private(seq);
+
+ for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
+ sk_for_each(sk, node, &raw_v6_htable[state->bucket])
+ if (sk->sk_family == PF_INET6)
+ goto out;
+ sk = NULL;
+out:
+ return sk;
+}
+
+static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
+{
+ struct raw6_iter_state* state = raw6_seq_private(seq);
+
+ do {
+ sk = sk_next(sk);
+try_again:
+ ;
+ } while (sk && sk->sk_family != PF_INET6);
+
+ if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
+ sk = sk_head(&raw_v6_htable[state->bucket]);
+ goto try_again;
+ }
+ return sk;
+}
+
+static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
+{
+ struct sock *sk = raw6_get_first(seq);
+ if (sk)
+ while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
+ --pos;
+ return pos ? NULL : sk;
+}
+
+static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock(&raw_v6_lock);
+ return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
+}
+
+static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct sock *sk;
+
+ if (v == SEQ_START_TOKEN)
+ sk = raw6_get_first(seq);
+ else
+ sk = raw6_get_next(seq, v);
+ ++*pos;
+ return sk;
+}
+
+static void raw6_seq_stop(struct seq_file *seq, void *v)
+{
+ read_unlock(&raw_v6_lock);
+}
+
+static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
+{
+ struct ipv6_pinfo *np = inet6_sk(sp);
+ struct in6_addr *dest, *src;
+ __u16 destp, srcp;
+
+ dest = &np->daddr;
+ src = &np->rcv_saddr;
+ destp = 0;
+ srcp = inet_sk(sp)->num;
+ 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",
+ i,
+ 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);
+}
+
+static int raw6_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
+ raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
+ return 0;
+}
+
+static struct seq_operations raw6_seq_ops = {
+ .start = raw6_seq_start,
+ .next = raw6_seq_next,
+ .stop = raw6_seq_stop,
+ .show = raw6_seq_show,
+};
+
+static int raw6_seq_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ int rc = -ENOMEM;
+ struct raw6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+ if (!s)
+ goto out;
+ rc = seq_open(file, &raw6_seq_ops);
+ if (rc)
+ goto out_kfree;
+ seq = file->private_data;
+ seq->private = s;
+ memset(s, 0, sizeof(*s));
+out:
+ return rc;
+out_kfree:
+ kfree(s);
+ goto out;
+}
+
+static struct file_operations raw6_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = raw6_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+int __init raw6_proc_init(void)
+{
+ if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops))
+ return -ENOMEM;
+ return 0;
+}
+
+void raw6_proc_exit(void)
+{
+ proc_net_remove("raw6");
+}
+#endif /* CONFIG_PROC_FS */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 07:30:32 +0000