/* * 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/config.h> #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/ipv6.h> #include <linux/icmpv6.h> #include <linux/init.h> #include <asm/uaccess.h> #include <net/sock.h> #include <net/snmp.h> #include <net/ipv6.h> #include <net/ndisc.h> #include <net/protocol.h> #include <net/transp_v6.h> #include <net/ip6_route.h> #include <net/addrconf.h> #include <net/ip.h> #include <net/udp.h> #include <net/raw.h> #include <net/inet_common.h> #include <net/ip6_checksum.h> #include <net/xfrm.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6); /* Grrr, addr_type already calculated by caller, but I don't want * to add some silly "cookie" argument to this method just for that. */ static int udp_v6_get_port(struct sock *sk, unsigned short snum) { struct sock *sk2; struct hlist_node *node; write_lock_bh(&udp_hash_lock); if (snum == 0) { int best_size_so_far, best, result, i; if (udp_port_rover > sysctl_local_port_range[1] || udp_port_rover < sysctl_local_port_range[0]) udp_port_rover = sysctl_local_port_range[0]; best_size_so_far = 32767; best = result = udp_port_rover; for (i = 0; i < UDP_HTABLE_SIZE; i++, result++) { int size; struct hlist_head *list; list = &udp_hash[result & (UDP_HTABLE_SIZE - 1)]; if (hlist_empty(list)) { if (result > sysctl_local_port_range[1]) result = sysctl_local_port_range[0] + ((result - sysctl_local_port_range[0]) & (UDP_HTABLE_SIZE - 1)); goto gotit; } size = 0; sk_for_each(sk2, node, list) if (++size >= best_size_so_far) goto next; best_size_so_far = size; best = result; next:; } result = best; for(;; result += UDP_HTABLE_SIZE) { if (result > sysctl_local_port_range[1]) result = sysctl_local_port_range[0] + ((result - sysctl_local_port_range[0]) & (UDP_HTABLE_SIZE - 1)); if (!udp_lport_inuse(result)) break; } gotit: udp_port_rover = snum = result; } else { sk_for_each(sk2, node, &udp_hash[snum & (UDP_HTABLE_SIZE - 1)]) { if (inet_sk(sk2)->num == snum && sk2 != sk && (!sk2->sk_bound_dev_if || !sk->sk_bound_dev_if || sk2->sk_bound_dev_if == sk->sk_bound_dev_if) && (!sk2->sk_reuse || !sk->sk_reuse) && ipv6_rcv_saddr_equal(sk, sk2)) goto fail; } } inet_sk(sk)->num = snum; if (sk_unhashed(sk)) { sk_add_node(sk, &udp_hash[snum & (UDP_HTABLE_SIZE - 1)]); sock_prot_inc_use(sk->sk_prot); } write_unlock_bh(&udp_hash_lock); return 0; fail: write_unlock_bh(&udp_hash_lock); return 1; } static void udp_v6_hash(struct sock *sk) { BUG(); } static void udp_v6_unhash(struct sock *sk) { write_lock_bh(&udp_hash_lock); if (sk_del_node_init(sk)) { inet_sk(sk)->num = 0; sock_prot_dec_use(sk->sk_prot); } write_unlock_bh(&udp_hash_lock); } static struct sock *udp_v6_lookup(struct in6_addr *saddr, u16 sport, struct in6_addr *daddr, u16 dport, int dif) { 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, &udp_hash[hnum & (UDP_HTABLE_SIZE - 1)]) { struct inet_sock *inet = inet_sk(sk); if (inet->num == 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; } /* * */ static void udpv6_close(struct sock *sk, long timeout) { sk_common_release(sk); } /* * This should be easy, if there is something there we * return it, otherwise we block. */ static 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; size_t copied; int err; 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, &err); if (!skb) goto out; copied = skb->len - sizeof(struct udphdr); if (copied > len) { copied = len; msg->msg_flags |= MSG_TRUNC; } if (skb->ip_summed==CHECKSUM_UNNECESSARY) { err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), 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, 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; 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 = skb->h.uh->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), skb->nh.iph->saddr); else { ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->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 = skb->len - sizeof(struct udphdr); out_free: skb_free_datagram(sk, skb); out: return err; csum_copy_err: /* Clear queue. */ if (flags&MSG_PEEK) { int clear = 0; spin_lock_bh(&sk->sk_receive_queue.lock); if (skb == skb_peek(&sk->sk_receive_queue)) { __skb_unlink(skb, &sk->sk_receive_queue); clear = 1; } spin_unlock_bh(&sk->sk_receive_queue.lock); if (clear) kfree_skb(skb); } skb_free_datagram(sk, skb); if (flags & MSG_DONTWAIT) { UDP6_INC_STATS_USER(UDP_MIB_INERRORS); return -EAGAIN; } goto try_again; } static void udpv6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, int type, int code, int offset, __u32 info) { struct ipv6_pinfo *np; struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; struct net_device *dev = skb->dev; 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 = udp_v6_lookup(daddr, uh->dest, saddr, uh->source, dev->ifindex); 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 int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) { if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { kfree_skb(skb); return -1; } if (skb->ip_summed != CHECKSUM_UNNECESSARY) { if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) { UDP6_INC_STATS_BH(UDP_MIB_INERRORS); kfree_skb(skb); return 0; } skb->ip_summed = CHECKSUM_UNNECESSARY; } if (sock_queue_rcv_skb(sk,skb)<0) { UDP6_INC_STATS_BH(UDP_MIB_INERRORS); kfree_skb(skb); return 0; } UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS); return 0; } static struct sock *udp_v6_mcast_next(struct sock *sk, u16 loc_port, struct in6_addr *loc_addr, u16 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 (inet->num == 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)) return s; 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 void udpv6_mcast_deliver(struct udphdr *uh, struct in6_addr *saddr, struct in6_addr *daddr, struct sk_buff *skb) { struct sock *sk, *sk2; int dif; read_lock(&udp_hash_lock); sk = sk_head(&udp_hash[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]); dif = skb->dev->ifindex; 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) udpv6_queue_rcv_skb(sk2, buff); } udpv6_queue_rcv_skb(sk, skb); out: read_unlock(&udp_hash_lock); } static int udpv6_rcv(struct sk_buff **pskb, unsigned int *nhoffp) { struct sk_buff *skb = *pskb; 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 = &skb->nh.ipv6h->saddr; daddr = &skb->nh.ipv6h->daddr; uh = skb->h.uh; ulen = ntohs(uh->len); /* Check for jumbo payload */ if (ulen == 0) ulen = skb->len; if (ulen > skb->len || ulen < sizeof(*uh)) goto short_packet; if (uh->check == 0) { /* RFC 2460 section 8.1 says that we SHOULD log this error. Well, it is reasonable. */ LIMIT_NETDEBUG( printk(KERN_INFO "IPv6: udp checksum is 0\n")); goto discard; } if (ulen < skb->len) { if (__pskb_trim(skb, ulen)) goto discard; saddr = &skb->nh.ipv6h->saddr; daddr = &skb->nh.ipv6h->daddr; uh = skb->h.uh; } if (skb->ip_summed==CHECKSUM_HW) { skb->ip_summed = CHECKSUM_UNNECESSARY; if (csum_ipv6_magic(saddr, daddr, ulen, IPPROTO_UDP, skb->csum)) { LIMIT_NETDEBUG(printk(KERN_DEBUG "udp v6 hw csum failure.\n")); skb->ip_summed = CHECKSUM_NONE; } } if (skb->ip_summed != CHECKSUM_UNNECESSARY) skb->csum = ~csum_ipv6_magic(saddr, daddr, ulen, IPPROTO_UDP, 0); /* * Multicast receive code */ if (ipv6_addr_is_multicast(daddr)) { udpv6_mcast_deliver(uh, saddr, daddr, skb); return 0; } /* Unicast */ /* * check socket cache ... must talk to Alan about his plans * for sock caches... i'll skip this for now. */ sk = udp_v6_lookup(saddr, uh->source, daddr, uh->dest, dev->ifindex); if (sk == NULL) { if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) goto discard; if (skb->ip_summed != CHECKSUM_UNNECESSARY && (unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) goto discard; UDP6_INC_STATS_BH(UDP_MIB_NOPORTS); icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); kfree_skb(skb); return(0); } /* deliver */ udpv6_queue_rcv_skb(sk, skb); sock_put(sk); return(0); short_packet: if (net_ratelimit()) printk(KERN_DEBUG "UDP: short packet: %d/%u\n", ulen, skb->len); discard: UDP6_INC_STATS_BH(UDP_MIB_INERRORS); kfree_skb(skb); return(0); } /* * 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 udp_sock *up) { struct sk_buff *skb; struct udphdr *uh; struct inet_sock *inet = inet_sk(sk); struct flowi *fl = &inet->cork.fl; int err = 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 = skb->h.uh; uh->source = fl->fl_ip_sport; uh->dest = fl->fl_ip_dport; uh->len = htons(up->len); uh->check = 0; if (sk->sk_no_check == UDP_CSUM_NOXMIT) { skb->ip_summed = CHECKSUM_NONE; goto send; } if (skb_queue_len(&sk->sk_write_queue) == 1) { skb->csum = csum_partial((char *)uh, sizeof(struct udphdr), skb->csum); uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, up->len, fl->proto, skb->csum); } else { u32 tmp_csum = 0; skb_queue_walk(&sk->sk_write_queue, skb) { tmp_csum = csum_add(tmp_csum, skb->csum); } tmp_csum = csum_partial((char *)uh, sizeof(struct udphdr), tmp_csum); tmp_csum = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, up->len, fl->proto, tmp_csum); uh->check = tmp_csum; } if (uh->check == 0) uh->check = -1; send: err = ip6_push_pending_frames(sk); out: up->len = 0; up->pending = 0; return err; } static 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 = &inet->cork.fl; struct dst_entry *dst; int addr_len = msg->msg_namelen; int ulen = len; int hlimit = -1; int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; int err; /* 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_type(daddr) == IPV6_ADDR_MAPPED) { 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_build_xmit */ 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; } 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); 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 = IPPROTO_UDP; 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; } 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: 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(printk(KERN_DEBUG "udp cork app bug 2\n")); err = -EINVAL; goto out; } up->pending = AF_INET6; do_append_data: up->len += ulen; err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, ulen, sizeof(struct udphdr), hlimit, 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, up); if (dst) 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); if (!err) { UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS); return len; } return err; do_confirm: dst_confirm(dst); if (!(msg->msg_flags&MSG_PROBE) || len) goto back_from_confirm; err = 0; goto out; } static 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 */ static int udpv6_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen) { struct udp_sock *up = udp_sk(sk); int val; int err = 0; if (level != SOL_UDP) return ipv6_setsockopt(sk, level, optname, optval, optlen); if(optlen<sizeof(int)) return -EINVAL; if (get_user(val, (int __user *)optval)) return -EFAULT; switch(optname) { case UDP_CORK: if (val != 0) { up->corkflag = 1; } else { up->corkflag = 0; lock_sock(sk); udp_v6_push_pending_frames(sk, up); release_sock(sk); } break; case UDP_ENCAP: switch (val) { case 0: up->encap_type = val; break; default: err = -ENOPROTOOPT; break; } break; default: err = -ENOPROTOOPT; break; }; return err; } static int udpv6_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { struct udp_sock *up = udp_sk(sk); int val, len; if (level != SOL_UDP) return ipv6_getsockopt(sk, level, optname, optval, optlen); if(get_user(len,optlen)) return -EFAULT; len = min_t(unsigned int, len, sizeof(int)); if(len < 0) return -EINVAL; switch(optname) { case UDP_CORK: val = up->corkflag; break; case UDP_ENCAP: val = up->encap_type; break; default: return -ENOPROTOOPT; }; if(put_user(len, optlen)) return -EFAULT; if(copy_to_user(optval, &val,len)) return -EFAULT; return 0; } 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); } static 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, .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 */ /* ------------------------------------------------------------------------ */ struct proto udpv6_prot = { .name = "UDPv6", .owner = THIS_MODULE, .close = udpv6_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_v6_hash, .unhash = udp_v6_unhash, .get_port = udp_v6_get_port, .obj_size = sizeof(struct udp6_sock), }; extern struct proto_ops inet6_dgram_ops; 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, }; void __init udpv6_init(void) { if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0) printk(KERN_ERR "udpv6_init: Could not register protocol\n"); inet6_register_protosw(&udpv6_protosw); }