X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fipv4%2Fraw.c;h=a3002fe65b7f4a345c1333c4d7f36392bee3b172;hb=c137f3dda04b0aee1bc6889cdc69185f53df8a82;hp=931084bfb57255afe5d1676a3bcea57e29bfa86b;hpb=e905a9edab7f4f14f9213b52234e4a346c690911;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c index 931084b..a3002fe 100644 --- a/net/ipv4/raw.c +++ b/net/ipv4/raw.c @@ -59,6 +59,7 @@ #include #include #include +#include #include #include #include @@ -79,38 +80,51 @@ #include #include -struct hlist_head raw_v4_htable[RAWV4_HTABLE_SIZE]; -DEFINE_RWLOCK(raw_v4_lock); +static struct raw_hashinfo raw_v4_hashinfo = { + .lock = __RW_LOCK_UNLOCKED(), +}; -static void raw_v4_hash(struct sock *sk) +void raw_hash_sk(struct sock *sk, struct raw_hashinfo *h) { - struct hlist_head *head = &raw_v4_htable[inet_sk(sk)->num & - (RAWV4_HTABLE_SIZE - 1)]; + struct hlist_head *head; + + head = &h->ht[inet_sk(sk)->num & (RAW_HTABLE_SIZE - 1)]; - write_lock_bh(&raw_v4_lock); + write_lock_bh(&h->lock); sk_add_node(sk, head); - sock_prot_inc_use(sk->sk_prot); - write_unlock_bh(&raw_v4_lock); + sock_prot_inuse_add(sk->sk_prot, 1); + write_unlock_bh(&h->lock); } +EXPORT_SYMBOL_GPL(raw_hash_sk); -static void raw_v4_unhash(struct sock *sk) +void raw_unhash_sk(struct sock *sk, struct raw_hashinfo *h) { - write_lock_bh(&raw_v4_lock); + write_lock_bh(&h->lock); if (sk_del_node_init(sk)) - sock_prot_dec_use(sk->sk_prot); - write_unlock_bh(&raw_v4_lock); + sock_prot_inuse_add(sk->sk_prot, -1); + write_unlock_bh(&h->lock); } +EXPORT_SYMBOL_GPL(raw_unhash_sk); -struct sock *__raw_v4_lookup(struct sock *sk, unsigned short num, - __be32 raddr, __be32 laddr, - int dif) +static void raw_v4_hash(struct sock *sk) +{ + raw_hash_sk(sk, &raw_v4_hashinfo); +} + +static void raw_v4_unhash(struct sock *sk) +{ + raw_unhash_sk(sk, &raw_v4_hashinfo); +} + +static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, + unsigned short num, __be32 raddr, __be32 laddr, int dif) { struct hlist_node *node; sk_for_each_from(sk, node) { struct inet_sock *inet = inet_sk(sk); - if (inet->num == num && + if (sk->sk_net == net && inet->num == num && !(inet->daddr && inet->daddr != raddr) && !(inet->rcv_saddr && inet->rcv_saddr != laddr) && !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)) @@ -132,7 +146,7 @@ static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb) if (!pskb_may_pull(skb, sizeof(struct icmphdr))) return 1; - type = skb->h.icmph->type; + type = icmp_hdr(skb)->type; if (type < 32) { __u32 data = raw_sk(sk)->filter.data; @@ -149,17 +163,20 @@ static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb) * RFC 1122: SHOULD pass TOS value up to the transport layer. * -> It does. And not only TOS, but all IP header. */ -int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash) +static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash) { struct sock *sk; struct hlist_head *head; int delivered = 0; + struct net *net; - read_lock(&raw_v4_lock); - head = &raw_v4_htable[hash]; + read_lock(&raw_v4_hashinfo.lock); + head = &raw_v4_hashinfo.ht[hash]; if (hlist_empty(head)) goto out; - sk = __raw_v4_lookup(__sk_head(head), iph->protocol, + + net = skb->dev->nd_net; + sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, iph->saddr, iph->daddr, skb->dev->ifindex); @@ -172,20 +189,38 @@ int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash) if (clone) raw_rcv(sk, clone); } - sk = __raw_v4_lookup(sk_next(sk), iph->protocol, + sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, iph->saddr, iph->daddr, skb->dev->ifindex); } out: - read_unlock(&raw_v4_lock); + read_unlock(&raw_v4_hashinfo.lock); return delivered; } -void raw_err (struct sock *sk, struct sk_buff *skb, u32 info) +int raw_local_deliver(struct sk_buff *skb, int protocol) +{ + int hash; + struct sock *raw_sk; + + hash = protocol & (RAW_HTABLE_SIZE - 1); + raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); + + /* If there maybe a raw socket we must check - if not we + * don't care less + */ + if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash)) + raw_sk = NULL; + + return raw_sk != NULL; + +} + +static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) { struct inet_sock *inet = inet_sk(sk); - int type = skb->h.icmph->type; - int code = skb->h.icmph->code; + const int type = icmp_hdr(skb)->type; + const int code = icmp_hdr(skb)->code; int err = 0; int harderr = 0; @@ -235,12 +270,38 @@ void raw_err (struct sock *sk, struct sk_buff *skb, u32 info) } } +void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) +{ + int hash; + struct sock *raw_sk; + struct iphdr *iph; + struct net *net; + + hash = protocol & (RAW_HTABLE_SIZE - 1); + + read_lock(&raw_v4_hashinfo.lock); + raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); + if (raw_sk != NULL) { + iph = (struct iphdr *)skb->data; + net = skb->dev->nd_net; + + while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, + iph->daddr, iph->saddr, + skb->dev->ifindex)) != NULL) { + raw_err(raw_sk, skb, info); + raw_sk = sk_next(raw_sk); + iph = (struct iphdr *)skb->data; + } + } + read_unlock(&raw_v4_hashinfo.lock); +} + static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb) { /* Charge it to the socket. */ if (sock_queue_rcv_skb(sk, skb) < 0) { - /* FIXME: increment a raw drops counter here */ + atomic_inc(&sk->sk_drops); kfree_skb(skb); return NET_RX_DROP; } @@ -251,12 +312,13 @@ static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb) int raw_rcv(struct sock *sk, struct sk_buff *skb) { if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { + atomic_inc(&sk->sk_drops); kfree_skb(skb); return NET_RX_DROP; } nf_reset(skb); - skb_push(skb, skb->data - skb->nh.raw); + skb_push(skb, skb->data - skb_network_header(skb)); raw_rcv_skb(sk, skb); return 0; @@ -270,6 +332,7 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length, int hh_len; struct iphdr *iph; struct sk_buff *skb; + unsigned int iphlen; int err; if (length > rt->u.dst.dev->mtu) { @@ -289,19 +352,23 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length, skb_reserve(skb, hh_len); skb->priority = sk->sk_priority; + skb->mark = sk->sk_mark; skb->dst = dst_clone(&rt->u.dst); - skb->nh.iph = iph = (struct iphdr *)skb_put(skb, length); + skb_reset_network_header(skb); + iph = ip_hdr(skb); + skb_put(skb, length); skb->ip_summed = CHECKSUM_NONE; - skb->h.raw = skb->nh.raw; + skb->transport_header = skb->network_header; err = memcpy_fromiovecend((void *)iph, from, 0, length); if (err) goto error_fault; /* We don't modify invalid header */ - if (length >= sizeof(*iph) && iph->ihl * 4U <= length) { + iphlen = iph->ihl * 4; + if (iphlen >= sizeof(*iph) && iphlen <= length) { if (!iph->saddr) iph->saddr = rt->rt_src; iph->check = 0; @@ -311,8 +378,11 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length, iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); } + if (iph->protocol == IPPROTO_ICMP) + icmp_out_count(((struct icmphdr *) + skb_transport_header(skb))->type); - err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev, + err = NF_HOOK(PF_INET, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, dst_output); if (err > 0) err = inet->recverr ? net_xmit_errno(err) : 0; @@ -466,7 +536,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, if (msg->msg_flags & MSG_DONTROUTE) tos |= RTO_ONLINK; - if (MULTICAST(daddr)) { + if (ipv4_is_multicast(daddr)) { if (!ipc.oif) ipc.oif = inet->mc_index; if (!saddr) @@ -475,6 +545,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, { struct flowi fl = { .oif = ipc.oif, + .mark = sk->sk_mark, .nl_u = { .ip4_u = { .daddr = daddr, .saddr = saddr, @@ -489,7 +560,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, } security_sk_classify_flow(sk, &fl); - err = ip_route_output_flow(&rt, &fl, sk, 1); + err = ip_route_output_flow(&init_net, &rt, &fl, sk, 1); } if (err) goto done; @@ -556,7 +627,7 @@ static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) goto out; - chk_addr_ret = inet_addr_type(addr->sin_addr.s_addr); + chk_addr_ret = inet_addr_type(sk->sk_net, addr->sin_addr.s_addr); ret = -EADDRNOTAVAIL; if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL && chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST) @@ -613,7 +684,7 @@ static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, /* Copy the address. */ if (sin) { sin->sin_family = AF_INET; - sin->sin_addr.s_addr = skb->nh.iph->saddr; + sin->sin_addr.s_addr = ip_hdr(skb)->saddr; sin->sin_port = 0; memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); } @@ -754,6 +825,8 @@ static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) } } +DEFINE_PROTO_INUSE(raw) + struct proto raw_prot = { .name = "RAW", .owner = THIS_MODULE, @@ -775,25 +848,21 @@ struct proto raw_prot = { .compat_setsockopt = compat_raw_setsockopt, .compat_getsockopt = compat_raw_getsockopt, #endif + REF_PROTO_INUSE(raw) }; #ifdef CONFIG_PROC_FS -struct raw_iter_state { - int bucket; -}; - -#define raw_seq_private(seq) ((struct raw_iter_state *)(seq)->private) - static struct sock *raw_get_first(struct seq_file *seq) { struct sock *sk; struct raw_iter_state* state = raw_seq_private(seq); - for (state->bucket = 0; state->bucket < RAWV4_HTABLE_SIZE; ++state->bucket) { + for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; + ++state->bucket) { struct hlist_node *node; - sk_for_each(sk, node, &raw_v4_htable[state->bucket]) - if (sk->sk_family == PF_INET) + sk_for_each(sk, node, &state->h->ht[state->bucket]) + if (sk->sk_net == state->p.net) goto found; } sk = NULL; @@ -809,10 +878,10 @@ static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) sk = sk_next(sk); try_again: ; - } while (sk && sk->sk_family != PF_INET); + } while (sk && sk->sk_net != state->p.net); - if (!sk && ++state->bucket < RAWV4_HTABLE_SIZE) { - sk = sk_head(&raw_v4_htable[state->bucket]); + if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { + sk = sk_head(&state->h->ht[state->bucket]); goto try_again; } return sk; @@ -828,13 +897,16 @@ static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) return pos ? NULL : sk; } -static void *raw_seq_start(struct seq_file *seq, loff_t *pos) +void *raw_seq_start(struct seq_file *seq, loff_t *pos) { - read_lock(&raw_v4_lock); + struct raw_iter_state *state = raw_seq_private(seq); + + read_lock(&state->h->lock); return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; } +EXPORT_SYMBOL_GPL(raw_seq_start); -static void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) +void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct sock *sk; @@ -845,13 +917,17 @@ static void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) ++*pos; return sk; } +EXPORT_SYMBOL_GPL(raw_seq_next); -static void raw_seq_stop(struct seq_file *seq, void *v) +void raw_seq_stop(struct seq_file *seq, void *v) { - read_unlock(&raw_v4_lock); + struct raw_iter_state *state = raw_seq_private(seq); + + read_unlock(&state->h->lock); } +EXPORT_SYMBOL_GPL(raw_seq_stop); -static __inline__ char *get_raw_sock(struct sock *sp, char *tmpbuf, int i) +static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) { struct inet_sock *inet = inet_sk(sp); __be32 dest = inet->daddr, @@ -859,80 +935,87 @@ static __inline__ char *get_raw_sock(struct sock *sp, char *tmpbuf, int i) __u16 destp = 0, srcp = inet->num; - sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X" - " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p", + seq_printf(seq, "%4d: %08X:%04X %08X:%04X" + " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d", i, src, srcp, dest, 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); - return tmpbuf; + atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); } static int raw_seq_show(struct seq_file *seq, void *v) { - char tmpbuf[129]; - if (v == SEQ_START_TOKEN) - seq_printf(seq, "%-127s\n", - " sl local_address rem_address st tx_queue " - "rx_queue tr tm->when retrnsmt uid timeout " - "inode"); - else { - struct raw_iter_state *state = raw_seq_private(seq); - - seq_printf(seq, "%-127s\n", - get_raw_sock(v, tmpbuf, state->bucket)); - } + seq_printf(seq, " sl local_address rem_address st tx_queue " + "rx_queue tr tm->when retrnsmt uid timeout " + "inode drops\n"); + else + raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); return 0; } -static struct seq_operations raw_seq_ops = { +static const struct seq_operations raw_seq_ops = { .start = raw_seq_start, .next = raw_seq_next, .stop = raw_seq_stop, .show = raw_seq_show, }; -static int raw_seq_open(struct inode *inode, struct file *file) +int raw_seq_open(struct inode *ino, struct file *file, + struct raw_hashinfo *h, const struct seq_operations *ops) { - struct seq_file *seq; - int rc = -ENOMEM; - struct raw_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); + int err; + struct raw_iter_state *i; - if (!s) - goto out; - rc = seq_open(file, &raw_seq_ops); - if (rc) - goto out_kfree; + err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state)); + if (err < 0) + return err; - seq = file->private_data; - seq->private = s; - memset(s, 0, sizeof(*s)); -out: - return rc; -out_kfree: - kfree(s); - goto out; + i = raw_seq_private((struct seq_file *)file->private_data); + i->h = h; + return 0; } +EXPORT_SYMBOL_GPL(raw_seq_open); -static struct file_operations raw_seq_fops = { +static int raw_v4_seq_open(struct inode *inode, struct file *file) +{ + return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops); +} + +static const struct file_operations raw_seq_fops = { .owner = THIS_MODULE, - .open = raw_seq_open, + .open = raw_v4_seq_open, .read = seq_read, .llseek = seq_lseek, - .release = seq_release_private, + .release = seq_release_net, }; -int __init raw_proc_init(void) +static __net_init int raw_init_net(struct net *net) { - if (!proc_net_fops_create("raw", S_IRUGO, &raw_seq_fops)) + if (!proc_net_fops_create(net, "raw", S_IRUGO, &raw_seq_fops)) return -ENOMEM; + return 0; } +static __net_exit void raw_exit_net(struct net *net) +{ + proc_net_remove(net, "raw"); +} + +static __net_initdata struct pernet_operations raw_net_ops = { + .init = raw_init_net, + .exit = raw_exit_net, +}; + +int __init raw_proc_init(void) +{ + return register_pernet_subsys(&raw_net_ops); +} + void __init raw_proc_exit(void) { - proc_net_remove("raw"); + unregister_pernet_subsys(&raw_net_ops); } #endif /* CONFIG_PROC_FS */