diff options
Diffstat (limited to 'net/ipv6/udp.c')
| -rw-r--r-- | net/ipv6/udp.c | 1065 |
1 files changed, 0 insertions, 1065 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c deleted file mode 100644 index 55feac7ba71..00000000000 --- a/net/ipv6/udp.c +++ /dev/null @@ -1,1065 +0,0 @@ -/* - * 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); -} |