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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#include <linux/types.h>#include <linux/atomic.h>#include <asm/byteorder.h>#include <asm/current.h>#include <linux/uaccess.h>#include <asm/ioctls.h>#include <linux/stddef.h>#include <linux/slab.h>#include <linux/errno.h>#include <linux/kernel.h>#include <linux/export.h>#include <linux/spinlock.h>#include <linux/sockios.h>#include <linux/socket.h>#include <linux/in.h>#include <linux/mroute.h>#include <linux/netdevice.h>#include <linux/in_route.h>#include <linux/route.h>#include <linux/skbuff.h>#include <linux/igmp.h>#include <net/net_namespace.h>#include <net/dst.h>#include <net/sock.h>#include <linux/ip.h>#include <linux/net.h>#include <net/ip.h>#include <net/icmp.h>#include <net/udp.h>#include <net/raw.h>#include <net/snmp.h>#include <net/tcp_states.h>#include <net/inet_common.h>#include <net/checksum.h>#include <net/xfrm.h>#include <linux/rtnetlink.h>#include <linux/proc_fs.h>#include <linux/seq_file.h>#include <linux/netfilter.h>#include <linux/netfilter_ipv4.h>#include <linux/compat.h>#include <linux/uio.h>
struct raw_frag_vec { struct msghdr *msg; union { struct icmphdr icmph; char c[1]; } hdr; int hlen;};
struct raw_hashinfo raw_v4_hashinfo;EXPORT_SYMBOL_GPL(raw_v4_hashinfo);
int raw_hash_sk(struct sock *sk){ struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; struct hlist_head *hlist;
hlist = &h->ht[raw_hashfunc(sock_net(sk), inet_sk(sk)->inet_num)];
spin_lock(&h->lock); sk_add_node_rcu(sk, hlist); sock_set_flag(sk, SOCK_RCU_FREE); spin_unlock(&h->lock); sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
return 0;}
void raw_unhash_sk(struct sock *sk){ struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
spin_lock(&h->lock); if (sk_del_node_init_rcu(sk)) sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); spin_unlock(&h->lock);}
bool raw_v4_match(struct net *net, const struct sock *sk, unsigned short num, __be32 raddr, __be32 laddr, int dif, int sdif){ const struct inet_sock *inet = inet_sk(sk); __be32 daddr, rcv_saddr;
if (!net_eq(sock_net(sk), net) || inet->inet_num != num) return false;
daddr = READ_ONCE(inet->inet_daddr); if (daddr && daddr != raddr) return false;
rcv_saddr = READ_ONCE(inet->inet_rcv_saddr); if (rcv_saddr && rcv_saddr != laddr) return false;
return raw_sk_bound_dev_eq(net, READ_ONCE(sk->sk_bound_dev_if), dif, sdif);}EXPORT_SYMBOL_GPL(raw_v4_match);
/* * 0 - deliver * 1 - block */static int icmp_filter(const struct sock *sk, const struct sk_buff *skb){ struct icmphdr _hdr; const struct icmphdr *hdr;
hdr = skb_header_pointer(skb, skb_transport_offset(skb), sizeof(_hdr), &_hdr); if (!hdr) return 1;
if (hdr->type < 32) { __u32 data = raw_sk(sk)->filter.data;
return ((1U << hdr->type) & data) != 0; }
/* Do not block unknown ICMP types */ return 0;}
/* IP input processing comes here for RAW socket delivery. * Caller owns SKB, so we must make clones. * * RFC 1122: SHOULD pass TOS value up to the transport layer. * -> It does. And not only TOS, but all IP header. */static int raw_v4_input(struct net *net, struct sk_buff *skb, const struct iphdr *iph, int hash){ int sdif = inet_sdif(skb); struct hlist_head *hlist; int dif = inet_iif(skb); int delivered = 0; struct sock *sk;
hlist = &raw_v4_hashinfo.ht[hash]; rcu_read_lock(); sk_for_each_rcu(sk, hlist) { if (!raw_v4_match(net, sk, iph->protocol, iph->saddr, iph->daddr, dif, sdif)) continue;
if (atomic_read(&sk->sk_rmem_alloc) >= READ_ONCE(sk->sk_rcvbuf)) { sk_drops_inc(sk); continue; }
delivered = 1; if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) && ip_mc_sf_allow(sk, iph->daddr, iph->saddr, skb->dev->ifindex, sdif)) { struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
/* Not releasing hash table! */ if (clone) raw_rcv(sk, clone); } } rcu_read_unlock(); return delivered;}
int raw_local_deliver(struct sk_buff *skb, int protocol){ struct net *net = dev_net(skb->dev);
return raw_v4_input(net, skb, ip_hdr(skb), raw_hashfunc(net, protocol));}
static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info){ struct inet_sock *inet = inet_sk(sk); const int type = icmp_hdr(skb)->type; const int code = icmp_hdr(skb)->code; int harderr = 0; bool recverr; int err = 0;
if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) ipv4_sk_update_pmtu(skb, sk, info); else if (type == ICMP_REDIRECT) { ipv4_sk_redirect(skb, sk); return; }
/* Report error on raw socket, if: 1. User requested ip_recverr. 2. Socket is connected (otherwise the error indication is useless without ip_recverr and error is hard. */ recverr = inet_test_bit(RECVERR, sk); if (!recverr && sk->sk_state != TCP_ESTABLISHED) return;
switch (type) { default: case ICMP_TIME_EXCEEDED: err = EHOSTUNREACH; break; case ICMP_SOURCE_QUENCH: return; case ICMP_PARAMETERPROB: err = EPROTO; harderr = 1; break; case ICMP_DEST_UNREACH: err = EHOSTUNREACH; if (code > NR_ICMP_UNREACH) break; if (code == ICMP_FRAG_NEEDED) { harderr = READ_ONCE(inet->pmtudisc) != IP_PMTUDISC_DONT; err = EMSGSIZE; } else { err = icmp_err_convert[code].errno; harderr = icmp_err_convert[code].fatal; } }
if (recverr) { const struct iphdr *iph = (const struct iphdr *)skb->data; u8 *payload = skb->data + (iph->ihl << 2);
if (inet_test_bit(HDRINCL, sk)) payload = skb->data; ip_icmp_error(sk, skb, err, 0, info, payload); }
if (recverr || harderr) { sk->sk_err = err; sk_error_report(sk); }}
void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info){ struct net *net = dev_net(skb->dev); int dif = skb->dev->ifindex; int sdif = inet_sdif(skb); struct hlist_head *hlist; const struct iphdr *iph; struct sock *sk; int hash;
hash = raw_hashfunc(net, protocol); hlist = &raw_v4_hashinfo.ht[hash];
rcu_read_lock(); sk_for_each_rcu(sk, hlist) { iph = (const struct iphdr *)skb->data; if (!raw_v4_match(net, sk, iph->protocol, iph->daddr, iph->saddr, dif, sdif)) continue; raw_err(sk, skb, info); } rcu_read_unlock();}
static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb){ enum skb_drop_reason reason;
/* Charge it to the socket. */
ipv4_pktinfo_prepare(sk, skb, true); reason = sock_queue_rcv_skb_reason(sk, skb); if (reason) { sk_skb_reason_drop(sk, skb, reason); return NET_RX_DROP; }
return NET_RX_SUCCESS;}
int raw_rcv(struct sock *sk, struct sk_buff *skb){ if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { sk_drops_inc(sk); sk_skb_reason_drop(sk, skb, SKB_DROP_REASON_XFRM_POLICY); return NET_RX_DROP; } nf_reset_ct(skb);
skb_push(skb, -skb_network_offset(skb));
raw_rcv_skb(sk, skb); return 0;}
static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, struct msghdr *msg, size_t length, struct rtable **rtp, unsigned int flags, const struct sockcm_cookie *sockc){ struct inet_sock *inet = inet_sk(sk); struct net *net = sock_net(sk); struct iphdr *iph; struct sk_buff *skb; unsigned int iphlen; int err; struct rtable *rt = *rtp; int hlen, tlen;
if (length > rt->dst.dev->mtu) { ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, rt->dst.dev->mtu); return -EMSGSIZE; } if (length < sizeof(struct iphdr)) return -EINVAL;
if (flags&MSG_PROBE) goto out;
hlen = LL_RESERVED_SPACE(rt->dst.dev); tlen = rt->dst.dev->needed_tailroom; skb = sock_alloc_send_skb(sk, length + hlen + tlen + 15, flags & MSG_DONTWAIT, &err); if (!skb) goto error; skb_reserve(skb, hlen);
skb->protocol = htons(ETH_P_IP); skb->priority = sockc->priority; skb->mark = sockc->mark; skb_set_delivery_type_by_clockid(skb, sockc->transmit_time, sk->sk_clockid); skb_dst_set(skb, &rt->dst); *rtp = NULL;
skb_reset_network_header(skb); iph = ip_hdr(skb); skb_put(skb, length);
skb->ip_summed = CHECKSUM_NONE;
skb_setup_tx_timestamp(skb, sockc);
if (flags & MSG_CONFIRM) skb_set_dst_pending_confirm(skb, 1);
skb->transport_header = skb->network_header; err = -EFAULT; if (memcpy_from_msg(iph, msg, length)) goto error_free;
iphlen = iph->ihl * 4;
/* * We don't want to modify the ip header, but we do need to * be sure that it won't cause problems later along the network * stack. Specifically we want to make sure that iph->ihl is a * sane value. If ihl points beyond the length of the buffer passed * in, reject the frame as invalid */ err = -EINVAL; if (iphlen > length || iphlen < sizeof(*iph)) goto error_free;
if (iphlen >= sizeof(*iph)) { if (!iph->saddr) iph->saddr = fl4->saddr; iph->check = 0; iph->tot_len = htons(length); if (!iph->id) ip_select_ident(net, skb, NULL);
iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); skb->transport_header += iphlen; if (iph->protocol == IPPROTO_ICMP && length >= iphlen + sizeof(struct icmphdr)) icmp_out_count(net, ((struct icmphdr *) skb_transport_header(skb))->type); }
err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, net, sk, skb, NULL, rt->dst.dev, dst_output); if (err > 0) err = net_xmit_errno(err); if (err) goto error;out: return 0;
error_free: kfree_skb(skb);error: IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); if (err == -ENOBUFS && !inet_test_bit(RECVERR, sk)) err = 0; return err;}
static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4){ int err;
if (fl4->flowi4_proto != IPPROTO_ICMP) return 0;
/* We only need the first two bytes. */ rfv->hlen = 2;
err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen); if (err) return err;
fl4->fl4_icmp_type = rfv->hdr.icmph.type; fl4->fl4_icmp_code = rfv->hdr.icmph.code;
return 0;}
static int raw_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb){ struct raw_frag_vec *rfv = from;
if (offset < rfv->hlen) { int copy = min(rfv->hlen - offset, len);
if (skb->ip_summed == CHECKSUM_PARTIAL) memcpy(to, rfv->hdr.c + offset, copy); else skb->csum = csum_block_add( skb->csum, csum_partial_copy_nocheck(rfv->hdr.c + offset, to, copy), odd);
odd = 0; offset += copy; to += copy; len -= copy;
if (!len) return 0; }
offset -= rfv->hlen;
return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);}
static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len){ DEFINE_RAW_FLEX(struct ip_options_rcu, opt_copy, opt.__data, IP_OPTIONS_DATA_FIXED_SIZE); struct inet_sock *inet = inet_sk(sk); struct net *net = sock_net(sk); struct ipcm_cookie ipc; struct rtable *rt = NULL; struct flowi4 fl4; u8 scope; int free = 0; __be32 daddr; __be32 saddr; int uc_index, err; struct raw_frag_vec rfv; int hdrincl;
err = -EMSGSIZE; if (len > 0xFFFF) goto out;
hdrincl = inet_test_bit(HDRINCL, sk);
/* * Check the flags. */
err = -EOPNOTSUPP; if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ goto out; /* compatibility */
/* * Get and verify the address. */
if (msg->msg_namelen) { DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name); err = -EINVAL; if (msg->msg_namelen < sizeof(*usin)) goto out; if (usin->sin_family != AF_INET) { pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n", __func__, current->comm); err = -EAFNOSUPPORT; if (usin->sin_family) goto out; } daddr = usin->sin_addr.s_addr; /* ANK: I did not forget to get protocol from port field. * I just do not know, who uses this weirdness. * IP_HDRINCL is much more convenient. */ } else { err = -EDESTADDRREQ; if (sk->sk_state != TCP_ESTABLISHED) goto out; daddr = inet->inet_daddr; }
ipcm_init_sk(&ipc, inet); /* Keep backward compat */ if (hdrincl) ipc.protocol = IPPROTO_RAW;
if (msg->msg_controllen) { err = ip_cmsg_send(sk, msg, &ipc, false); if (unlikely(err)) { kfree(ipc.opt); goto out; } if (ipc.opt) free = 1; }
saddr = ipc.addr; ipc.addr = daddr;
if (!ipc.opt) { struct ip_options_rcu *inet_opt;
rcu_read_lock(); inet_opt = rcu_dereference(inet->inet_opt); if (inet_opt) { memcpy(opt_copy, inet_opt, sizeof(*inet_opt) + inet_opt->opt.optlen); ipc.opt = opt_copy; } rcu_read_unlock(); }
if (ipc.opt) { err = -EINVAL; /* Linux does not mangle headers on raw sockets, * so that IP options + IP_HDRINCL is non-sense. */ if (hdrincl) goto done; if (ipc.opt->opt.srr) { if (!daddr) goto done; daddr = ipc.opt->opt.faddr; } } scope = ip_sendmsg_scope(inet, &ipc, msg);
uc_index = READ_ONCE(inet->uc_index); if (ipv4_is_multicast(daddr)) { if (!ipc.oif || netif_index_is_l3_master(sock_net(sk), ipc.oif)) ipc.oif = READ_ONCE(inet->mc_index); if (!saddr) saddr = READ_ONCE(inet->mc_addr); } else if (!ipc.oif) { ipc.oif = uc_index; } else if (ipv4_is_lbcast(daddr) && uc_index) { /* oif is set, packet is to local broadcast * and uc_index is set. oif is most likely set * by sk_bound_dev_if. If uc_index != oif check if the * oif is an L3 master and uc_index is an L3 slave. * If so, we want to allow the send using the uc_index. */ if (ipc.oif != uc_index && ipc.oif == l3mdev_master_ifindex_by_index(sock_net(sk), uc_index)) { ipc.oif = uc_index; } }
flowi4_init_output(&fl4, ipc.oif, ipc.sockc.mark, ipc.tos & INET_DSCP_MASK, scope, hdrincl ? ipc.protocol : sk->sk_protocol, inet_sk_flowi_flags(sk) | (hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), daddr, saddr, 0, 0, sk_uid(sk));
fl4.fl4_icmp_type = 0; fl4.fl4_icmp_code = 0;
if (!hdrincl) { rfv.msg = msg; rfv.hlen = 0;
err = raw_probe_proto_opt(&rfv, &fl4); if (err) goto done; }
security_sk_classify_flow(sk, flowi4_to_flowi_common(&fl4)); rt = ip_route_output_flow(net, &fl4, sk); if (IS_ERR(rt)) { err = PTR_ERR(rt); rt = NULL; goto done; }
err = -EACCES; if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) goto done;
if (msg->msg_flags & MSG_CONFIRM) goto do_confirm;back_from_confirm:
if (hdrincl) err = raw_send_hdrinc(sk, &fl4, msg, len, &rt, msg->msg_flags, &ipc.sockc);
else { if (!ipc.addr) ipc.addr = fl4.daddr; lock_sock(sk); err = ip_append_data(sk, &fl4, raw_getfrag, &rfv, len, 0, &ipc, &rt, msg->msg_flags); if (err) ip_flush_pending_frames(sk); else if (!(msg->msg_flags & MSG_MORE)) { err = ip_push_pending_frames(sk, &fl4); if (err == -ENOBUFS && !inet_test_bit(RECVERR, sk)) err = 0; } release_sock(sk); }done: if (free) kfree(ipc.opt); ip_rt_put(rt);
out: if (err < 0) return err; return len;
do_confirm: if (msg->msg_flags & MSG_PROBE) dst_confirm_neigh(&rt->dst, &fl4.daddr); if (!(msg->msg_flags & MSG_PROBE) || len) goto back_from_confirm; err = 0; goto done;}
static void raw_close(struct sock *sk, long timeout){ /* * Raw sockets may have direct kernel references. Kill them. */ ip_ra_control(sk, 0, NULL);
sk_common_release(sk);}
static void raw_destroy(struct sock *sk){ lock_sock(sk); ip_flush_pending_frames(sk); release_sock(sk);}
/* This gets rid of all the nasties in af_inet. -DaveM */static int raw_bind(struct sock *sk, struct sockaddr_unsized *uaddr, int addr_len){ struct inet_sock *inet = inet_sk(sk); struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; struct net *net = sock_net(sk); u32 tb_id = RT_TABLE_LOCAL; int ret = -EINVAL; int chk_addr_ret;
lock_sock(sk); if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) goto out;
if (sk->sk_bound_dev_if) tb_id = l3mdev_fib_table_by_index(net, sk->sk_bound_dev_if) ? : tb_id;
chk_addr_ret = inet_addr_type_table(net, addr->sin_addr.s_addr, tb_id);
ret = -EADDRNOTAVAIL; if (!inet_addr_valid_or_nonlocal(net, inet, addr->sin_addr.s_addr, chk_addr_ret)) goto out;
inet->inet_saddr = addr->sin_addr.s_addr; WRITE_ONCE(inet->inet_rcv_saddr, addr->sin_addr.s_addr); if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) inet->inet_saddr = 0; /* Use device */ sk_dst_reset(sk); ret = 0;out: release_sock(sk); return ret;}
/* * This should be easy, if there is something there * we return it, otherwise we block. */
static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags){ struct inet_sock *inet = inet_sk(sk); size_t copied = 0; int err = -EOPNOTSUPP; DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); struct sk_buff *skb;
if (flags & MSG_OOB) goto out;
if (flags & MSG_ERRQUEUE) { err = ip_recv_error(sk, msg, len); goto out; }
skb = skb_recv_datagram(sk, flags, &err); if (!skb) goto out;
copied = skb->len; if (len < copied) { msg->msg_flags |= MSG_TRUNC; copied = len; }
err = skb_copy_datagram_msg(skb, 0, msg, copied); if (err) goto done;
sock_recv_cmsgs(msg, sk, skb);
/* Copy the address. */ if (sin) { sin->sin_family = AF_INET; sin->sin_addr.s_addr = ip_hdr(skb)->saddr; sin->sin_port = 0; memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); msg->msg_namelen = sizeof(*sin); } if (inet_cmsg_flags(inet)) ip_cmsg_recv(msg, skb); if (flags & MSG_TRUNC) copied = skb->len;done: skb_free_datagram(sk, skb);out: if (err) return err; return copied;}
static int raw_sk_init(struct sock *sk){ struct raw_sock *rp = raw_sk(sk);
sk->sk_drop_counters = &rp->drop_counters; if (inet_sk(sk)->inet_num == IPPROTO_ICMP) memset(&rp->filter, 0, sizeof(rp->filter)); return 0;}
static int raw_seticmpfilter(struct sock *sk, sockptr_t optval, int optlen){ if (optlen > sizeof(struct icmp_filter)) optlen = sizeof(struct icmp_filter); if (copy_from_sockptr(&raw_sk(sk)->filter, optval, optlen)) return -EFAULT; return 0;}
static int raw_geticmpfilter(struct sock *sk, sockopt_t *opt){ int len = opt->optlen;
if (len < 0) return -EINVAL; if (len > sizeof(struct icmp_filter)) len = sizeof(struct icmp_filter); opt->optlen = len; if (copy_to_iter(&raw_sk(sk)->filter, len, &opt->iter_out) != len) return -EFAULT; return 0;}
static int do_raw_setsockopt(struct sock *sk, int optname, sockptr_t optval, unsigned int optlen){ if (optname == ICMP_FILTER) { if (inet_sk(sk)->inet_num != IPPROTO_ICMP) return -EOPNOTSUPP; else return raw_seticmpfilter(sk, optval, optlen); } return -ENOPROTOOPT;}
static int raw_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval, unsigned int optlen){ if (level != SOL_RAW) return ip_setsockopt(sk, level, optname, optval, optlen); return do_raw_setsockopt(sk, optname, optval, optlen);}
static int do_raw_getsockopt(struct sock *sk, int optname, sockopt_t *opt){ if (optname == ICMP_FILTER) { if (inet_sk(sk)->inet_num != IPPROTO_ICMP) return -EOPNOTSUPP; else return raw_geticmpfilter(sk, opt); } return -ENOPROTOOPT;}
static int raw_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen){ sockopt_t opt; int err;
if (level != SOL_RAW) return ip_getsockopt(sk, level, optname, optval, optlen);
err = sockopt_init_user(&opt, optval, optlen); if (err) return err;
err = do_raw_getsockopt(sk, optname, &opt); if (err) return err;
if (put_user(opt.optlen, optlen)) return -EFAULT;
return 0;}
static int raw_ioctl(struct sock *sk, int cmd, int *karg){ switch (cmd) { case SIOCOUTQ: { *karg = sk_wmem_alloc_get(sk); return 0; } case SIOCINQ: { struct sk_buff *skb;
spin_lock_bh(&sk->sk_receive_queue.lock); skb = skb_peek(&sk->sk_receive_queue); if (skb) *karg = skb->len; else *karg = 0; spin_unlock_bh(&sk->sk_receive_queue.lock); return 0; }
default:#ifdef CONFIG_IP_MROUTE return ipmr_ioctl(sk, cmd, karg);#else return -ENOIOCTLCMD;#endif }}
#ifdef CONFIG_COMPATstatic int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg){ switch (cmd) { case SIOCOUTQ: case SIOCINQ: return -ENOIOCTLCMD; default:#ifdef CONFIG_IP_MROUTE return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));#else return -ENOIOCTLCMD;#endif }}#endif
int raw_abort(struct sock *sk, int err){ lock_sock(sk);
sk->sk_err = err; sk_error_report(sk); __udp_disconnect(sk, 0);
release_sock(sk);
return 0;}
struct proto raw_prot = { .name = "RAW", .owner = THIS_MODULE, .close = raw_close, .destroy = raw_destroy, .connect = ip4_datagram_connect, .disconnect = __udp_disconnect, .ioctl = raw_ioctl, .init = raw_sk_init, .setsockopt = raw_setsockopt, .getsockopt = raw_getsockopt, .sendmsg = raw_sendmsg, .recvmsg = raw_recvmsg, .bind = raw_bind, .backlog_rcv = raw_rcv_skb, .release_cb = ip4_datagram_release_cb, .hash = raw_hash_sk, .unhash = raw_unhash_sk, .obj_size = sizeof(struct raw_sock), .useroffset = offsetof(struct raw_sock, filter), .usersize = sizeof_field(struct raw_sock, filter), .h.raw_hash = &raw_v4_hashinfo,#ifdef CONFIG_COMPAT .compat_ioctl = compat_raw_ioctl,#endif .diag_destroy = raw_abort,};
#ifdef CONFIG_PROC_FSstatic struct sock *raw_get_first(struct seq_file *seq, int bucket){ struct raw_hashinfo *h = pde_data(file_inode(seq->file)); struct raw_iter_state *state = raw_seq_private(seq); struct hlist_head *hlist; struct sock *sk;
for (state->bucket = bucket; state->bucket < RAW_HTABLE_SIZE; ++state->bucket) { hlist = &h->ht[state->bucket]; sk_for_each(sk, hlist) { if (sock_net(sk) == seq_file_net(seq)) return sk; } } return NULL;}
static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk){ struct raw_iter_state *state = raw_seq_private(seq);
do { sk = sk_next(sk); } while (sk && sock_net(sk) != seq_file_net(seq));
if (!sk) return raw_get_first(seq, state->bucket + 1); return sk;}
static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos){ struct sock *sk = raw_get_first(seq, 0);
if (sk) while (pos && (sk = raw_get_next(seq, sk)) != NULL) --pos; return pos ? NULL : sk;}
void *raw_seq_start(struct seq_file *seq, loff_t *pos) __acquires(&h->lock){ struct raw_hashinfo *h = pde_data(file_inode(seq->file));
spin_lock(&h->lock);
return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;}
void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos){ struct sock *sk;
if (v == SEQ_START_TOKEN) sk = raw_get_first(seq, 0); else sk = raw_get_next(seq, v); ++*pos; return sk;}
void raw_seq_stop(struct seq_file *seq, void *v) __releases(&h->lock){ struct raw_hashinfo *h = pde_data(file_inode(seq->file));
spin_unlock(&h->lock);}
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->inet_daddr, src = inet->inet_rcv_saddr; __u16 destp = 0, srcp = inet->inet_num;
seq_printf(seq, "%4d: %08X:%04X %08X:%04X" " %02X %08X:%08X %02X:%08lX %08X %5u %8d %llu %d 0 %u\n", i, src, srcp, dest, destp, sp->sk_state, sk_wmem_alloc_get(sp), sk_rmem_alloc_get(sp), 0, 0L, 0, from_kuid_munged(seq_user_ns(seq), sk_uid(sp)), 0, sock_i_ino(sp), refcount_read(&sp->sk_refcnt), sk_drops_read(sp));}
static int raw_seq_show(struct seq_file *seq, void *v){ if (v == SEQ_START_TOKEN) seq_printf(seq, " sl local_address rem_address st tx_queue " "rx_queue tr tm->when retrnsmt uid timeout " "inode ref pointer drops\n"); else raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); return 0;}
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 __net_init int raw_init_net(struct net *net){ if (!proc_create_net_data("raw", 0444, net->proc_net, &raw_seq_ops, sizeof(struct raw_iter_state), &raw_v4_hashinfo)) return -ENOMEM;
return 0;}
static __net_exit void raw_exit_net(struct net *net){ remove_proc_entry("raw", net->proc_net);}
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){ unregister_pernet_subsys(&raw_net_ops);}#endif /* CONFIG_PROC_FS */
static void raw_sysctl_init_net(struct net *net){#ifdef CONFIG_NET_L3_MASTER_DEV net->ipv4.sysctl_raw_l3mdev_accept = 1;#endif}
static int __net_init raw_sysctl_init(struct net *net){ raw_sysctl_init_net(net); return 0;}
static struct pernet_operations __net_initdata raw_sysctl_ops = { .init = raw_sysctl_init,};
void __init raw_init(void){ raw_sysctl_init_net(&init_net); if (register_pernet_subsys(&raw_sysctl_ops)) panic("RAW: failed to init sysctl parameters.\n");}