1db8dac20SDavid S. Miller /* 2db8dac20SDavid S. Miller * UDP over IPv6 3db8dac20SDavid S. Miller * Linux INET6 implementation 4db8dac20SDavid S. Miller * 5db8dac20SDavid S. Miller * Authors: 6db8dac20SDavid S. Miller * Pedro Roque <roque@di.fc.ul.pt> 7db8dac20SDavid S. Miller * 8db8dac20SDavid S. Miller * Based on linux/ipv4/udp.c 9db8dac20SDavid S. Miller * 10db8dac20SDavid S. Miller * Fixes: 11db8dac20SDavid S. Miller * Hideaki YOSHIFUJI : sin6_scope_id support 12db8dac20SDavid S. Miller * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which 13db8dac20SDavid S. Miller * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind 14db8dac20SDavid S. Miller * a single port at the same time. 15db8dac20SDavid S. Miller * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data 16db8dac20SDavid S. Miller * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. 17db8dac20SDavid S. Miller * 18db8dac20SDavid S. Miller * This program is free software; you can redistribute it and/or 19db8dac20SDavid S. Miller * modify it under the terms of the GNU General Public License 20db8dac20SDavid S. Miller * as published by the Free Software Foundation; either version 21db8dac20SDavid S. Miller * 2 of the License, or (at your option) any later version. 22db8dac20SDavid S. Miller */ 23db8dac20SDavid S. Miller 24db8dac20SDavid S. Miller #include <linux/errno.h> 25db8dac20SDavid S. Miller #include <linux/types.h> 26db8dac20SDavid S. Miller #include <linux/socket.h> 27db8dac20SDavid S. Miller #include <linux/sockios.h> 28db8dac20SDavid S. Miller #include <linux/net.h> 29db8dac20SDavid S. Miller #include <linux/in6.h> 30db8dac20SDavid S. Miller #include <linux/netdevice.h> 31db8dac20SDavid S. Miller #include <linux/if_arp.h> 32db8dac20SDavid S. Miller #include <linux/ipv6.h> 33db8dac20SDavid S. Miller #include <linux/icmpv6.h> 34db8dac20SDavid S. Miller #include <linux/init.h> 35db8dac20SDavid S. Miller #include <linux/module.h> 36db8dac20SDavid S. Miller #include <linux/skbuff.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 38db8dac20SDavid S. Miller #include <asm/uaccess.h> 39db8dac20SDavid S. Miller 40db8dac20SDavid S. Miller #include <net/ndisc.h> 41db8dac20SDavid S. Miller #include <net/protocol.h> 42db8dac20SDavid S. Miller #include <net/transp_v6.h> 43db8dac20SDavid S. Miller #include <net/ip6_route.h> 44db8dac20SDavid S. Miller #include <net/raw.h> 45db8dac20SDavid S. Miller #include <net/tcp_states.h> 46db8dac20SDavid S. Miller #include <net/ip6_checksum.h> 47db8dac20SDavid S. Miller #include <net/xfrm.h> 48db8dac20SDavid S. Miller 49db8dac20SDavid S. Miller #include <linux/proc_fs.h> 50db8dac20SDavid S. Miller #include <linux/seq_file.h> 51db8dac20SDavid S. Miller #include "udp_impl.h" 52db8dac20SDavid S. Miller 53b2f5e7cdSVlad Yasevich int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) 54b2f5e7cdSVlad Yasevich { 55b2f5e7cdSVlad Yasevich const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; 56b2f5e7cdSVlad Yasevich const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); 57c720c7e8SEric Dumazet __be32 sk1_rcv_saddr = inet_sk(sk)->inet_rcv_saddr; 58499923c7SVlad Yasevich __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); 59b2f5e7cdSVlad Yasevich int sk_ipv6only = ipv6_only_sock(sk); 60b2f5e7cdSVlad Yasevich int sk2_ipv6only = inet_v6_ipv6only(sk2); 61b2f5e7cdSVlad Yasevich int addr_type = ipv6_addr_type(sk_rcv_saddr6); 62b2f5e7cdSVlad Yasevich int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; 63b2f5e7cdSVlad Yasevich 64b2f5e7cdSVlad Yasevich /* if both are mapped, treat as IPv4 */ 65b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) 66499923c7SVlad Yasevich return (!sk2_ipv6only && 67c720c7e8SEric Dumazet (!sk1_rcv_saddr || !sk2_rcv_saddr || 68c720c7e8SEric Dumazet sk1_rcv_saddr == sk2_rcv_saddr)); 69b2f5e7cdSVlad Yasevich 70b2f5e7cdSVlad Yasevich if (addr_type2 == IPV6_ADDR_ANY && 71b2f5e7cdSVlad Yasevich !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) 72b2f5e7cdSVlad Yasevich return 1; 73b2f5e7cdSVlad Yasevich 74b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_ANY && 75b2f5e7cdSVlad Yasevich !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) 76b2f5e7cdSVlad Yasevich return 1; 77b2f5e7cdSVlad Yasevich 78b2f5e7cdSVlad Yasevich if (sk2_rcv_saddr6 && 79b2f5e7cdSVlad Yasevich ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) 80b2f5e7cdSVlad Yasevich return 1; 81b2f5e7cdSVlad Yasevich 82b2f5e7cdSVlad Yasevich return 0; 83b2f5e7cdSVlad Yasevich } 84b2f5e7cdSVlad Yasevich 85d4cada4aSEric Dumazet static unsigned int udp6_portaddr_hash(struct net *net, 86d4cada4aSEric Dumazet const struct in6_addr *addr6, 87d4cada4aSEric Dumazet unsigned int port) 88d4cada4aSEric Dumazet { 89d4cada4aSEric Dumazet unsigned int hash, mix = net_hash_mix(net); 90d4cada4aSEric Dumazet 91d4cada4aSEric Dumazet if (ipv6_addr_any(addr6)) 92d4cada4aSEric Dumazet hash = jhash_1word(0, mix); 93856540eeSBrian Haley else if (ipv6_addr_v4mapped(addr6)) 940eae88f3SEric Dumazet hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); 95d4cada4aSEric Dumazet else 960eae88f3SEric Dumazet hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); 97d4cada4aSEric Dumazet 98d4cada4aSEric Dumazet return hash ^ port; 99d4cada4aSEric Dumazet } 100d4cada4aSEric Dumazet 101d4cada4aSEric Dumazet 1026ba5a3c5SPavel Emelyanov int udp_v6_get_port(struct sock *sk, unsigned short snum) 103db8dac20SDavid S. Miller { 10430fff923SEric Dumazet unsigned int hash2_nulladdr = 10530fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); 10630fff923SEric Dumazet unsigned int hash2_partial = 10730fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0); 10830fff923SEric Dumazet 109d4cada4aSEric Dumazet /* precompute partial secondary hash */ 11030fff923SEric Dumazet udp_sk(sk)->udp_portaddr_hash = hash2_partial; 11130fff923SEric Dumazet return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); 112db8dac20SDavid S. Miller } 113db8dac20SDavid S. Miller 114719f8358SEric Dumazet static void udp_v6_rehash(struct sock *sk) 115719f8358SEric Dumazet { 116719f8358SEric Dumazet u16 new_hash = udp6_portaddr_hash(sock_net(sk), 117719f8358SEric Dumazet &inet6_sk(sk)->rcv_saddr, 118719f8358SEric Dumazet inet_sk(sk)->inet_num); 119719f8358SEric Dumazet 120719f8358SEric Dumazet udp_lib_rehash(sk, new_hash); 121719f8358SEric Dumazet } 122719f8358SEric Dumazet 123645ca708SEric Dumazet static inline int compute_score(struct sock *sk, struct net *net, 124645ca708SEric Dumazet unsigned short hnum, 12588440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 12688440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 127645ca708SEric Dumazet int dif) 128db8dac20SDavid S. Miller { 129645ca708SEric Dumazet int score = -1; 130db8dac20SDavid S. Miller 131d4cada4aSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 132db8dac20SDavid S. Miller sk->sk_family == PF_INET6) { 133db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 134645ca708SEric Dumazet struct inet_sock *inet = inet_sk(sk); 135645ca708SEric Dumazet 136645ca708SEric Dumazet score = 0; 137c720c7e8SEric Dumazet if (inet->inet_dport) { 138c720c7e8SEric Dumazet if (inet->inet_dport != sport) 139645ca708SEric Dumazet return -1; 140db8dac20SDavid S. Miller score++; 141db8dac20SDavid S. Miller } 142db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 143db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) 144645ca708SEric Dumazet return -1; 145db8dac20SDavid S. Miller score++; 146db8dac20SDavid S. Miller } 147db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr)) { 148db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->daddr, saddr)) 149645ca708SEric Dumazet return -1; 150db8dac20SDavid S. Miller score++; 151db8dac20SDavid S. Miller } 152db8dac20SDavid S. Miller if (sk->sk_bound_dev_if) { 153db8dac20SDavid S. Miller if (sk->sk_bound_dev_if != dif) 154645ca708SEric Dumazet return -1; 155db8dac20SDavid S. Miller score++; 156db8dac20SDavid S. Miller } 157645ca708SEric Dumazet } 158645ca708SEric Dumazet return score; 159645ca708SEric Dumazet } 160645ca708SEric Dumazet 161fddc17deSEric Dumazet #define SCORE2_MAX (1 + 1 + 1) 162fddc17deSEric Dumazet static inline int compute_score2(struct sock *sk, struct net *net, 163fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 164fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned short hnum, 165fddc17deSEric Dumazet int dif) 166fddc17deSEric Dumazet { 167fddc17deSEric Dumazet int score = -1; 168fddc17deSEric Dumazet 169fddc17deSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 170fddc17deSEric Dumazet sk->sk_family == PF_INET6) { 171fddc17deSEric Dumazet struct ipv6_pinfo *np = inet6_sk(sk); 172fddc17deSEric Dumazet struct inet_sock *inet = inet_sk(sk); 173fddc17deSEric Dumazet 174fddc17deSEric Dumazet if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) 175fddc17deSEric Dumazet return -1; 176fddc17deSEric Dumazet score = 0; 177fddc17deSEric Dumazet if (inet->inet_dport) { 178fddc17deSEric Dumazet if (inet->inet_dport != sport) 179fddc17deSEric Dumazet return -1; 180fddc17deSEric Dumazet score++; 181fddc17deSEric Dumazet } 182fddc17deSEric Dumazet if (!ipv6_addr_any(&np->daddr)) { 183fddc17deSEric Dumazet if (!ipv6_addr_equal(&np->daddr, saddr)) 184fddc17deSEric Dumazet return -1; 185fddc17deSEric Dumazet score++; 186fddc17deSEric Dumazet } 187fddc17deSEric Dumazet if (sk->sk_bound_dev_if) { 188fddc17deSEric Dumazet if (sk->sk_bound_dev_if != dif) 189fddc17deSEric Dumazet return -1; 190fddc17deSEric Dumazet score++; 191fddc17deSEric Dumazet } 192fddc17deSEric Dumazet } 193fddc17deSEric Dumazet return score; 194fddc17deSEric Dumazet } 195fddc17deSEric Dumazet 196fddc17deSEric Dumazet 197fddc17deSEric Dumazet /* called with read_rcu_lock() */ 198fddc17deSEric Dumazet static struct sock *udp6_lib_lookup2(struct net *net, 199fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 200fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned int hnum, int dif, 201fddc17deSEric Dumazet struct udp_hslot *hslot2, unsigned int slot2) 202fddc17deSEric Dumazet { 203fddc17deSEric Dumazet struct sock *sk, *result; 204fddc17deSEric Dumazet struct hlist_nulls_node *node; 205fddc17deSEric Dumazet int score, badness; 206fddc17deSEric Dumazet 207fddc17deSEric Dumazet begin: 208fddc17deSEric Dumazet result = NULL; 209fddc17deSEric Dumazet badness = -1; 210fddc17deSEric Dumazet udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { 211fddc17deSEric Dumazet score = compute_score2(sk, net, saddr, sport, 212fddc17deSEric Dumazet daddr, hnum, dif); 213fddc17deSEric Dumazet if (score > badness) { 214fddc17deSEric Dumazet result = sk; 215fddc17deSEric Dumazet badness = score; 216fddc17deSEric Dumazet if (score == SCORE2_MAX) 217fddc17deSEric Dumazet goto exact_match; 218fddc17deSEric Dumazet } 219fddc17deSEric Dumazet } 220fddc17deSEric Dumazet /* 221fddc17deSEric Dumazet * if the nulls value we got at the end of this lookup is 222fddc17deSEric Dumazet * not the expected one, we must restart lookup. 223fddc17deSEric Dumazet * We probably met an item that was moved to another chain. 224fddc17deSEric Dumazet */ 225fddc17deSEric Dumazet if (get_nulls_value(node) != slot2) 226fddc17deSEric Dumazet goto begin; 227fddc17deSEric Dumazet 228fddc17deSEric Dumazet if (result) { 229fddc17deSEric Dumazet exact_match: 230fddc17deSEric Dumazet if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) 231fddc17deSEric Dumazet result = NULL; 232fddc17deSEric Dumazet else if (unlikely(compute_score2(result, net, saddr, sport, 233fddc17deSEric Dumazet daddr, hnum, dif) < badness)) { 234fddc17deSEric Dumazet sock_put(result); 235fddc17deSEric Dumazet goto begin; 236fddc17deSEric Dumazet } 237fddc17deSEric Dumazet } 238fddc17deSEric Dumazet return result; 239fddc17deSEric Dumazet } 240fddc17deSEric Dumazet 241645ca708SEric Dumazet static struct sock *__udp6_lib_lookup(struct net *net, 24288440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 24388440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 244645ca708SEric Dumazet int dif, struct udp_table *udptable) 245645ca708SEric Dumazet { 246271b72c7SEric Dumazet struct sock *sk, *result; 24788ab1932SEric Dumazet struct hlist_nulls_node *node; 248645ca708SEric Dumazet unsigned short hnum = ntohs(dport); 249fddc17deSEric Dumazet unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); 250fddc17deSEric Dumazet struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; 251271b72c7SEric Dumazet int score, badness; 252645ca708SEric Dumazet 253271b72c7SEric Dumazet rcu_read_lock(); 254fddc17deSEric Dumazet if (hslot->count > 10) { 255fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, daddr, hnum); 256fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 257fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 258fddc17deSEric Dumazet if (hslot->count < hslot2->count) 259fddc17deSEric Dumazet goto begin; 260fddc17deSEric Dumazet 261fddc17deSEric Dumazet result = udp6_lib_lookup2(net, saddr, sport, 262fddc17deSEric Dumazet daddr, hnum, dif, 263fddc17deSEric Dumazet hslot2, slot2); 264fddc17deSEric Dumazet if (!result) { 265fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); 266fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 267fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 268fddc17deSEric Dumazet if (hslot->count < hslot2->count) 269fddc17deSEric Dumazet goto begin; 270fddc17deSEric Dumazet 2711223c67cSJorge Boncompte [DTI2] result = udp6_lib_lookup2(net, saddr, sport, 2721223c67cSJorge Boncompte [DTI2] &in6addr_any, hnum, dif, 273fddc17deSEric Dumazet hslot2, slot2); 274fddc17deSEric Dumazet } 275fddc17deSEric Dumazet rcu_read_unlock(); 276fddc17deSEric Dumazet return result; 277fddc17deSEric Dumazet } 278271b72c7SEric Dumazet begin: 279271b72c7SEric Dumazet result = NULL; 280271b72c7SEric Dumazet badness = -1; 28188ab1932SEric Dumazet sk_nulls_for_each_rcu(sk, node, &hslot->head) { 282645ca708SEric Dumazet score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); 283645ca708SEric Dumazet if (score > badness) { 284db8dac20SDavid S. Miller result = sk; 285db8dac20SDavid S. Miller badness = score; 286db8dac20SDavid S. Miller } 287db8dac20SDavid S. Miller } 28888ab1932SEric Dumazet /* 28988ab1932SEric Dumazet * if the nulls value we got at the end of this lookup is 29088ab1932SEric Dumazet * not the expected one, we must restart lookup. 29188ab1932SEric Dumazet * We probably met an item that was moved to another chain. 29288ab1932SEric Dumazet */ 293fddc17deSEric Dumazet if (get_nulls_value(node) != slot) 29488ab1932SEric Dumazet goto begin; 29588ab1932SEric Dumazet 296271b72c7SEric Dumazet if (result) { 297271b72c7SEric Dumazet if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) 298271b72c7SEric Dumazet result = NULL; 299271b72c7SEric Dumazet else if (unlikely(compute_score(result, net, hnum, saddr, sport, 300271b72c7SEric Dumazet daddr, dport, dif) < badness)) { 301271b72c7SEric Dumazet sock_put(result); 302271b72c7SEric Dumazet goto begin; 303271b72c7SEric Dumazet } 304271b72c7SEric Dumazet } 305271b72c7SEric Dumazet rcu_read_unlock(); 306db8dac20SDavid S. Miller return result; 307db8dac20SDavid S. Miller } 308db8dac20SDavid S. Miller 309607c4aafSKOVACS Krisztian static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, 310607c4aafSKOVACS Krisztian __be16 sport, __be16 dport, 311645ca708SEric Dumazet struct udp_table *udptable) 312607c4aafSKOVACS Krisztian { 31323542618SKOVACS Krisztian struct sock *sk; 314607c4aafSKOVACS Krisztian struct ipv6hdr *iph = ipv6_hdr(skb); 315607c4aafSKOVACS Krisztian 31623542618SKOVACS Krisztian if (unlikely(sk = skb_steal_sock(skb))) 31723542618SKOVACS Krisztian return sk; 318adf30907SEric Dumazet return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, 319607c4aafSKOVACS Krisztian &iph->daddr, dport, inet6_iif(skb), 320607c4aafSKOVACS Krisztian udptable); 321607c4aafSKOVACS Krisztian } 322607c4aafSKOVACS Krisztian 323db8dac20SDavid S. Miller /* 324db8dac20SDavid S. Miller * This should be easy, if there is something there we 325db8dac20SDavid S. Miller * return it, otherwise we block. 326db8dac20SDavid S. Miller */ 327db8dac20SDavid S. Miller 328db8dac20SDavid S. Miller int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, 329db8dac20SDavid S. Miller struct msghdr *msg, size_t len, 330db8dac20SDavid S. Miller int noblock, int flags, int *addr_len) 331db8dac20SDavid S. Miller { 332db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 333db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 334db8dac20SDavid S. Miller struct sk_buff *skb; 33581d54ec8SGerrit Renker unsigned int ulen; 336db8dac20SDavid S. Miller int peeked; 337db8dac20SDavid S. Miller int err; 338db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 339f26ba175SWei Yongjun int is_udp4; 3408a74ad60SEric Dumazet bool slow; 341db8dac20SDavid S. Miller 342db8dac20SDavid S. Miller if (addr_len) 343db8dac20SDavid S. Miller *addr_len=sizeof(struct sockaddr_in6); 344db8dac20SDavid S. Miller 345db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 346db8dac20SDavid S. Miller return ipv6_recv_error(sk, msg, len); 347db8dac20SDavid S. Miller 3484b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 3494b340ae2SBrian Haley return ipv6_recv_rxpmtu(sk, msg, len); 3504b340ae2SBrian Haley 351db8dac20SDavid S. Miller try_again: 352db8dac20SDavid S. Miller skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), 353db8dac20SDavid S. Miller &peeked, &err); 354db8dac20SDavid S. Miller if (!skb) 355db8dac20SDavid S. Miller goto out; 356db8dac20SDavid S. Miller 357db8dac20SDavid S. Miller ulen = skb->len - sizeof(struct udphdr); 35881d54ec8SGerrit Renker if (len > ulen) 35981d54ec8SGerrit Renker len = ulen; 36081d54ec8SGerrit Renker else if (len < ulen) 361db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 362db8dac20SDavid S. Miller 363f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 364f26ba175SWei Yongjun 365db8dac20SDavid S. Miller /* 366db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 367db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 368db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 369db8dac20SDavid S. Miller */ 370db8dac20SDavid S. Miller 37181d54ec8SGerrit Renker if (len < ulen || UDP_SKB_CB(skb)->partial_cov) { 372db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 373db8dac20SDavid S. Miller goto csum_copy_err; 374db8dac20SDavid S. Miller } 375db8dac20SDavid S. Miller 376db8dac20SDavid S. Miller if (skb_csum_unnecessary(skb)) 377db8dac20SDavid S. Miller err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), 37881d54ec8SGerrit Renker msg->msg_iov,len); 379db8dac20SDavid S. Miller else { 380db8dac20SDavid S. Miller err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); 381db8dac20SDavid S. Miller if (err == -EINVAL) 382db8dac20SDavid S. Miller goto csum_copy_err; 383db8dac20SDavid S. Miller } 384db8dac20SDavid S. Miller if (err) 385db8dac20SDavid S. Miller goto out_free; 386db8dac20SDavid S. Miller 387f26ba175SWei Yongjun if (!peeked) { 388f26ba175SWei Yongjun if (is_udp4) 389f26ba175SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 390f26ba175SWei Yongjun UDP_MIB_INDATAGRAMS, is_udplite); 391f26ba175SWei Yongjun else 392235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 393235b9f7aSPavel Emelyanov UDP_MIB_INDATAGRAMS, is_udplite); 394f26ba175SWei Yongjun } 395db8dac20SDavid S. Miller 3963b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 397db8dac20SDavid S. Miller 398db8dac20SDavid S. Miller /* Copy the address. */ 399db8dac20SDavid S. Miller if (msg->msg_name) { 400db8dac20SDavid S. Miller struct sockaddr_in6 *sin6; 401db8dac20SDavid S. Miller 402db8dac20SDavid S. Miller sin6 = (struct sockaddr_in6 *) msg->msg_name; 403db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 404db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 405db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 406db8dac20SDavid S. Miller sin6->sin6_scope_id = 0; 407db8dac20SDavid S. Miller 408f26ba175SWei Yongjun if (is_udp4) 409b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 410b301e82cSBrian Haley &sin6->sin6_addr); 411db8dac20SDavid S. Miller else { 412db8dac20SDavid S. Miller ipv6_addr_copy(&sin6->sin6_addr, 413db8dac20SDavid S. Miller &ipv6_hdr(skb)->saddr); 414db8dac20SDavid S. Miller if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 415db8dac20SDavid S. Miller sin6->sin6_scope_id = IP6CB(skb)->iif; 416db8dac20SDavid S. Miller } 417db8dac20SDavid S. Miller 418db8dac20SDavid S. Miller } 419f26ba175SWei Yongjun if (is_udp4) { 420db8dac20SDavid S. Miller if (inet->cmsg_flags) 421db8dac20SDavid S. Miller ip_cmsg_recv(msg, skb); 422db8dac20SDavid S. Miller } else { 423db8dac20SDavid S. Miller if (np->rxopt.all) 424db8dac20SDavid S. Miller datagram_recv_ctl(sk, msg, skb); 425db8dac20SDavid S. Miller } 426db8dac20SDavid S. Miller 42781d54ec8SGerrit Renker err = len; 428db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 429db8dac20SDavid S. Miller err = ulen; 430db8dac20SDavid S. Miller 431db8dac20SDavid S. Miller out_free: 4329d410c79SEric Dumazet skb_free_datagram_locked(sk, skb); 433db8dac20SDavid S. Miller out: 434db8dac20SDavid S. Miller return err; 435db8dac20SDavid S. Miller 436db8dac20SDavid S. Miller csum_copy_err: 4378a74ad60SEric Dumazet slow = lock_sock_fast(sk); 4380856f939SWei Yongjun if (!skb_kill_datagram(sk, skb, flags)) { 4390856f939SWei Yongjun if (is_udp4) 4400856f939SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 4410856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4420856f939SWei Yongjun else 4430856f939SWei Yongjun UDP6_INC_STATS_USER(sock_net(sk), 4440856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4450856f939SWei Yongjun } 4468a74ad60SEric Dumazet unlock_sock_fast(sk, slow); 447db8dac20SDavid S. Miller 448db8dac20SDavid S. Miller if (flags & MSG_DONTWAIT) 449db8dac20SDavid S. Miller return -EAGAIN; 450db8dac20SDavid S. Miller goto try_again; 451db8dac20SDavid S. Miller } 452db8dac20SDavid S. Miller 453db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 454d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 455645ca708SEric Dumazet struct udp_table *udptable) 456db8dac20SDavid S. Miller { 457db8dac20SDavid S. Miller struct ipv6_pinfo *np; 458db8dac20SDavid S. Miller struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; 459db8dac20SDavid S. Miller struct in6_addr *saddr = &hdr->saddr; 460db8dac20SDavid S. Miller struct in6_addr *daddr = &hdr->daddr; 461db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr*)(skb->data+offset); 462db8dac20SDavid S. Miller struct sock *sk; 463db8dac20SDavid S. Miller int err; 464db8dac20SDavid S. Miller 465c346dca1SYOSHIFUJI Hideaki sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, 466db8dac20SDavid S. Miller saddr, uh->source, inet6_iif(skb), udptable); 467db8dac20SDavid S. Miller if (sk == NULL) 468db8dac20SDavid S. Miller return; 469db8dac20SDavid S. Miller 470db8dac20SDavid S. Miller np = inet6_sk(sk); 471db8dac20SDavid S. Miller 472db8dac20SDavid S. Miller if (!icmpv6_err_convert(type, code, &err) && !np->recverr) 473db8dac20SDavid S. Miller goto out; 474db8dac20SDavid S. Miller 475db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) 476db8dac20SDavid S. Miller goto out; 477db8dac20SDavid S. Miller 478b1faf566SEric Dumazet if (np->recverr) 479db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 480b1faf566SEric Dumazet 481db8dac20SDavid S. Miller sk->sk_err = err; 482db8dac20SDavid S. Miller sk->sk_error_report(sk); 483db8dac20SDavid S. Miller out: 484db8dac20SDavid S. Miller sock_put(sk); 485db8dac20SDavid S. Miller } 486db8dac20SDavid S. Miller 487db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 488d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 489d5fdd6baSBrian Haley u8 code, int offset, __be32 info ) 490db8dac20SDavid S. Miller { 491645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 492db8dac20SDavid S. Miller } 493db8dac20SDavid S. Miller 494db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) 495db8dac20SDavid S. Miller { 496db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 497db8dac20SDavid S. Miller int rc; 498db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 499db8dac20SDavid S. Miller 500db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 501db8dac20SDavid S. Miller goto drop; 502db8dac20SDavid S. Miller 503db8dac20SDavid S. Miller /* 504db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 505db8dac20SDavid S. Miller */ 506db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 507db8dac20SDavid S. Miller 508db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 509db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" 510db8dac20SDavid S. Miller " %d while full coverage %d requested\n", 511db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 512db8dac20SDavid S. Miller goto drop; 513db8dac20SDavid S. Miller } 514db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 515db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " 516db8dac20SDavid S. Miller "too small, need min %d\n", 517db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 518db8dac20SDavid S. Miller goto drop; 519db8dac20SDavid S. Miller } 520db8dac20SDavid S. Miller } 521db8dac20SDavid S. Miller 522db8dac20SDavid S. Miller if (sk->sk_filter) { 523db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 524db8dac20SDavid S. Miller goto drop; 525db8dac20SDavid S. Miller } 526db8dac20SDavid S. Miller 527f84af32cSEric Dumazet if ((rc = ip_queue_rcv_skb(sk, skb)) < 0) { 528db8dac20SDavid S. Miller /* Note that an ENOMEM error is charged twice */ 529766e9037SEric Dumazet if (rc == -ENOMEM) 530ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), 531ef28d1a2SPavel Emelyanov UDP_MIB_RCVBUFERRORS, is_udplite); 5328edf19c2SEric Dumazet goto drop_no_sk_drops_inc; 533db8dac20SDavid S. Miller } 534db8dac20SDavid S. Miller 535db8dac20SDavid S. Miller return 0; 536db8dac20SDavid S. Miller drop: 5378edf19c2SEric Dumazet atomic_inc(&sk->sk_drops); 5388edf19c2SEric Dumazet drop_no_sk_drops_inc: 539ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 540db8dac20SDavid S. Miller kfree_skb(skb); 541db8dac20SDavid S. Miller return -1; 542db8dac20SDavid S. Miller } 543db8dac20SDavid S. Miller 544920a4611SEric Dumazet static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, 545db8dac20SDavid S. Miller __be16 loc_port, struct in6_addr *loc_addr, 546db8dac20SDavid S. Miller __be16 rmt_port, struct in6_addr *rmt_addr, 547db8dac20SDavid S. Miller int dif) 548db8dac20SDavid S. Miller { 54988ab1932SEric Dumazet struct hlist_nulls_node *node; 550db8dac20SDavid S. Miller struct sock *s = sk; 551db8dac20SDavid S. Miller unsigned short num = ntohs(loc_port); 552db8dac20SDavid S. Miller 55388ab1932SEric Dumazet sk_nulls_for_each_from(s, node) { 554db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(s); 555db8dac20SDavid S. Miller 556920a4611SEric Dumazet if (!net_eq(sock_net(s), net)) 557b8ad0cbcSDaniel Lezcano continue; 558b8ad0cbcSDaniel Lezcano 559d4cada4aSEric Dumazet if (udp_sk(s)->udp_port_hash == num && 560d4cada4aSEric Dumazet s->sk_family == PF_INET6) { 561db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(s); 562c720c7e8SEric Dumazet if (inet->inet_dport) { 563c720c7e8SEric Dumazet if (inet->inet_dport != rmt_port) 564db8dac20SDavid S. Miller continue; 565db8dac20SDavid S. Miller } 566db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr) && 567db8dac20SDavid S. Miller !ipv6_addr_equal(&np->daddr, rmt_addr)) 568db8dac20SDavid S. Miller continue; 569db8dac20SDavid S. Miller 570db8dac20SDavid S. Miller if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) 571db8dac20SDavid S. Miller continue; 572db8dac20SDavid S. Miller 573db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 574db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) 575db8dac20SDavid S. Miller continue; 576db8dac20SDavid S. Miller } 577db8dac20SDavid S. Miller if (!inet6_mc_check(s, loc_addr, rmt_addr)) 578db8dac20SDavid S. Miller continue; 579db8dac20SDavid S. Miller return s; 580db8dac20SDavid S. Miller } 581db8dac20SDavid S. Miller } 582db8dac20SDavid S. Miller return NULL; 583db8dac20SDavid S. Miller } 584db8dac20SDavid S. Miller 585a1ab77f9SEric Dumazet static void flush_stack(struct sock **stack, unsigned int count, 586a1ab77f9SEric Dumazet struct sk_buff *skb, unsigned int final) 587a1ab77f9SEric Dumazet { 588a1ab77f9SEric Dumazet unsigned int i; 589a1ab77f9SEric Dumazet struct sock *sk; 590a1ab77f9SEric Dumazet struct sk_buff *skb1; 591a1ab77f9SEric Dumazet 592a1ab77f9SEric Dumazet for (i = 0; i < count; i++) { 593a1ab77f9SEric Dumazet skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); 594a1ab77f9SEric Dumazet 595a1ab77f9SEric Dumazet sk = stack[i]; 596f6b8f32cSEric Dumazet if (skb1) { 597c377411fSEric Dumazet if (sk_rcvqueues_full(sk, skb)) { 598c377411fSEric Dumazet kfree_skb(skb1); 599c377411fSEric Dumazet goto drop; 600c377411fSEric Dumazet } 601a1ab77f9SEric Dumazet bh_lock_sock(sk); 602a1ab77f9SEric Dumazet if (!sock_owned_by_user(sk)) 603a1ab77f9SEric Dumazet udpv6_queue_rcv_skb(sk, skb1); 604a3a858ffSZhu Yi else if (sk_add_backlog(sk, skb1)) { 60555349790SZhu Yi kfree_skb(skb1); 606a1ab77f9SEric Dumazet bh_unlock_sock(sk); 60755349790SZhu Yi goto drop; 60855349790SZhu Yi } 60955349790SZhu Yi bh_unlock_sock(sk); 61055349790SZhu Yi continue; 61155349790SZhu Yi } 61255349790SZhu Yi drop: 613f6b8f32cSEric Dumazet atomic_inc(&sk->sk_drops); 614f6b8f32cSEric Dumazet UDP6_INC_STATS_BH(sock_net(sk), 615f6b8f32cSEric Dumazet UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); 616f6b8f32cSEric Dumazet UDP6_INC_STATS_BH(sock_net(sk), 617f6b8f32cSEric Dumazet UDP_MIB_INERRORS, IS_UDPLITE(sk)); 618a1ab77f9SEric Dumazet } 619a1ab77f9SEric Dumazet } 620db8dac20SDavid S. Miller /* 621db8dac20SDavid S. Miller * Note: called only from the BH handler context, 622db8dac20SDavid S. Miller * so we don't need to lock the hashes. 623db8dac20SDavid S. Miller */ 624e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 625e3163493SPavel Emelyanov struct in6_addr *saddr, struct in6_addr *daddr, 626645ca708SEric Dumazet struct udp_table *udptable) 627db8dac20SDavid S. Miller { 628a1ab77f9SEric Dumazet struct sock *sk, *stack[256 / sizeof(struct sock *)]; 629db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 630f86dcc5aSEric Dumazet struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); 631db8dac20SDavid S. Miller int dif; 632a1ab77f9SEric Dumazet unsigned int i, count = 0; 633db8dac20SDavid S. Miller 634645ca708SEric Dumazet spin_lock(&hslot->lock); 63588ab1932SEric Dumazet sk = sk_nulls_head(&hslot->head); 636db8dac20SDavid S. Miller dif = inet6_iif(skb); 637920a4611SEric Dumazet sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); 638a1ab77f9SEric Dumazet while (sk) { 639a1ab77f9SEric Dumazet stack[count++] = sk; 640a1ab77f9SEric Dumazet sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, 641a1ab77f9SEric Dumazet uh->source, saddr, dif); 642a1ab77f9SEric Dumazet if (unlikely(count == ARRAY_SIZE(stack))) { 643a1ab77f9SEric Dumazet if (!sk) 644a1ab77f9SEric Dumazet break; 645a1ab77f9SEric Dumazet flush_stack(stack, count, skb, ~0); 646a1ab77f9SEric Dumazet count = 0; 647db8dac20SDavid S. Miller } 648a1ab77f9SEric Dumazet } 649a1ab77f9SEric Dumazet /* 650a1ab77f9SEric Dumazet * before releasing the lock, we must take reference on sockets 651a1ab77f9SEric Dumazet */ 652a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 653a1ab77f9SEric Dumazet sock_hold(stack[i]); 654db8dac20SDavid S. Miller 655645ca708SEric Dumazet spin_unlock(&hslot->lock); 656a1ab77f9SEric Dumazet 657a1ab77f9SEric Dumazet if (count) { 658a1ab77f9SEric Dumazet flush_stack(stack, count, skb, count - 1); 659a1ab77f9SEric Dumazet 660a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 661a1ab77f9SEric Dumazet sock_put(stack[i]); 662a1ab77f9SEric Dumazet } else { 663a1ab77f9SEric Dumazet kfree_skb(skb); 664a1ab77f9SEric Dumazet } 665db8dac20SDavid S. Miller return 0; 666db8dac20SDavid S. Miller } 667db8dac20SDavid S. Miller 668db8dac20SDavid S. Miller static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, 669db8dac20SDavid S. Miller int proto) 670db8dac20SDavid S. Miller { 671db8dac20SDavid S. Miller int err; 672db8dac20SDavid S. Miller 673db8dac20SDavid S. Miller UDP_SKB_CB(skb)->partial_cov = 0; 674db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov = skb->len; 675db8dac20SDavid S. Miller 676db8dac20SDavid S. Miller if (proto == IPPROTO_UDPLITE) { 677db8dac20SDavid S. Miller err = udplite_checksum_init(skb, uh); 678db8dac20SDavid S. Miller if (err) 679db8dac20SDavid S. Miller return err; 680db8dac20SDavid S. Miller } 681db8dac20SDavid S. Miller 682db8dac20SDavid S. Miller if (uh->check == 0) { 683db8dac20SDavid S. Miller /* RFC 2460 section 8.1 says that we SHOULD log 684db8dac20SDavid S. Miller this error. Well, it is reasonable. 685db8dac20SDavid S. Miller */ 686db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); 687db8dac20SDavid S. Miller return 1; 688db8dac20SDavid S. Miller } 689db8dac20SDavid S. Miller if (skb->ip_summed == CHECKSUM_COMPLETE && 690db8dac20SDavid S. Miller !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, 691db8dac20SDavid S. Miller skb->len, proto, skb->csum)) 692db8dac20SDavid S. Miller skb->ip_summed = CHECKSUM_UNNECESSARY; 693db8dac20SDavid S. Miller 694db8dac20SDavid S. Miller if (!skb_csum_unnecessary(skb)) 695db8dac20SDavid S. Miller skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 696db8dac20SDavid S. Miller &ipv6_hdr(skb)->daddr, 697db8dac20SDavid S. Miller skb->len, proto, 0)); 698db8dac20SDavid S. Miller 699db8dac20SDavid S. Miller return 0; 700db8dac20SDavid S. Miller } 701db8dac20SDavid S. Miller 702645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 703db8dac20SDavid S. Miller int proto) 704db8dac20SDavid S. Miller { 7053ffe533cSAlexey Dobriyan struct net *net = dev_net(skb->dev); 706db8dac20SDavid S. Miller struct sock *sk; 707db8dac20SDavid S. Miller struct udphdr *uh; 708db8dac20SDavid S. Miller struct in6_addr *saddr, *daddr; 709db8dac20SDavid S. Miller u32 ulen = 0; 710db8dac20SDavid S. Miller 711db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 712d6bc0149SBjørn Mork goto discard; 713db8dac20SDavid S. Miller 714db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 715db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 716db8dac20SDavid S. Miller uh = udp_hdr(skb); 717db8dac20SDavid S. Miller 718db8dac20SDavid S. Miller ulen = ntohs(uh->len); 719db8dac20SDavid S. Miller if (ulen > skb->len) 720db8dac20SDavid S. Miller goto short_packet; 721db8dac20SDavid S. Miller 722db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 723db8dac20SDavid S. Miller /* UDP validates ulen. */ 724db8dac20SDavid S. Miller 725db8dac20SDavid S. Miller /* Check for jumbo payload */ 726db8dac20SDavid S. Miller if (ulen == 0) 727db8dac20SDavid S. Miller ulen = skb->len; 728db8dac20SDavid S. Miller 729db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 730db8dac20SDavid S. Miller goto short_packet; 731db8dac20SDavid S. Miller 732db8dac20SDavid S. Miller if (ulen < skb->len) { 733db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 734db8dac20SDavid S. Miller goto short_packet; 735db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 736db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 737db8dac20SDavid S. Miller uh = udp_hdr(skb); 738db8dac20SDavid S. Miller } 739db8dac20SDavid S. Miller } 740db8dac20SDavid S. Miller 741db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 742db8dac20SDavid S. Miller goto discard; 743db8dac20SDavid S. Miller 744db8dac20SDavid S. Miller /* 745db8dac20SDavid S. Miller * Multicast receive code 746db8dac20SDavid S. Miller */ 747db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 748e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 749e3163493SPavel Emelyanov saddr, daddr, udptable); 750db8dac20SDavid S. Miller 751db8dac20SDavid S. Miller /* Unicast */ 752db8dac20SDavid S. Miller 753db8dac20SDavid S. Miller /* 754db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 755db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 756db8dac20SDavid S. Miller */ 757607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 758db8dac20SDavid S. Miller 759db8dac20SDavid S. Miller if (sk == NULL) { 760db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 761db8dac20SDavid S. Miller goto discard; 762db8dac20SDavid S. Miller 763db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 764db8dac20SDavid S. Miller goto discard; 765ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, 766ef28d1a2SPavel Emelyanov proto == IPPROTO_UDPLITE); 767db8dac20SDavid S. Miller 7683ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 769db8dac20SDavid S. Miller 770db8dac20SDavid S. Miller kfree_skb(skb); 771db8dac20SDavid S. Miller return 0; 772db8dac20SDavid S. Miller } 773db8dac20SDavid S. Miller 774db8dac20SDavid S. Miller /* deliver */ 775db8dac20SDavid S. Miller 776c377411fSEric Dumazet if (sk_rcvqueues_full(sk, skb)) { 777c377411fSEric Dumazet sock_put(sk); 778c377411fSEric Dumazet goto discard; 779c377411fSEric Dumazet } 780d97106eaSHerbert Xu bh_lock_sock(sk); 781db8dac20SDavid S. Miller if (!sock_owned_by_user(sk)) 782db8dac20SDavid S. Miller udpv6_queue_rcv_skb(sk, skb); 783a3a858ffSZhu Yi else if (sk_add_backlog(sk, skb)) { 78455349790SZhu Yi atomic_inc(&sk->sk_drops); 78555349790SZhu Yi bh_unlock_sock(sk); 78655349790SZhu Yi sock_put(sk); 78755349790SZhu Yi goto discard; 78855349790SZhu Yi } 789db8dac20SDavid S. Miller bh_unlock_sock(sk); 790db8dac20SDavid S. Miller sock_put(sk); 791db8dac20SDavid S. Miller return 0; 792db8dac20SDavid S. Miller 793db8dac20SDavid S. Miller short_packet: 794d6bc0149SBjørn Mork LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 795db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 796d6bc0149SBjørn Mork saddr, 797d6bc0149SBjørn Mork ntohs(uh->source), 798d6bc0149SBjørn Mork ulen, 799d6bc0149SBjørn Mork skb->len, 800d6bc0149SBjørn Mork daddr, 801d6bc0149SBjørn Mork ntohs(uh->dest)); 802db8dac20SDavid S. Miller 803db8dac20SDavid S. Miller discard: 804ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 805db8dac20SDavid S. Miller kfree_skb(skb); 806db8dac20SDavid S. Miller return 0; 807db8dac20SDavid S. Miller } 808db8dac20SDavid S. Miller 809db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 810db8dac20SDavid S. Miller { 811645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 812db8dac20SDavid S. Miller } 813db8dac20SDavid S. Miller 814db8dac20SDavid S. Miller /* 815db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 816db8dac20SDavid S. Miller */ 817db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 818db8dac20SDavid S. Miller { 819db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 820db8dac20SDavid S. Miller 82136d926b9SDenis V. Lunev if (up->pending == AF_INET) 82236d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 82336d926b9SDenis V. Lunev else if (up->pending) { 824db8dac20SDavid S. Miller up->len = 0; 825db8dac20SDavid S. Miller up->pending = 0; 826db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 827db8dac20SDavid S. Miller } 828db8dac20SDavid S. Miller } 829db8dac20SDavid S. Miller 830493c6be3SSridhar Samudrala /** 831493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 832493c6be3SSridhar Samudrala * @sk: socket we are sending on 833493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 834493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 835493c6be3SSridhar Samudrala */ 836493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 837493c6be3SSridhar Samudrala const struct in6_addr *saddr, 838493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 839493c6be3SSridhar Samudrala { 840493c6be3SSridhar Samudrala unsigned int offset; 841493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 842493c6be3SSridhar Samudrala __wsum csum = 0; 843493c6be3SSridhar Samudrala 844493c6be3SSridhar Samudrala if (skb_queue_len(&sk->sk_write_queue) == 1) { 845493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 846493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 847493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 848493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 849493c6be3SSridhar Samudrala } else { 850493c6be3SSridhar Samudrala /* 851493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 852493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 853493c6be3SSridhar Samudrala * should be together 854493c6be3SSridhar Samudrala */ 855493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 856493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 857493c6be3SSridhar Samudrala 858493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 859493c6be3SSridhar Samudrala 860493c6be3SSridhar Samudrala skb_queue_walk(&sk->sk_write_queue, skb) { 861493c6be3SSridhar Samudrala csum = csum_add(csum, skb->csum); 862493c6be3SSridhar Samudrala } 863493c6be3SSridhar Samudrala 864493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 865493c6be3SSridhar Samudrala csum); 866493c6be3SSridhar Samudrala if (uh->check == 0) 867493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 868493c6be3SSridhar Samudrala } 869493c6be3SSridhar Samudrala } 870493c6be3SSridhar Samudrala 871db8dac20SDavid S. Miller /* 872db8dac20SDavid S. Miller * Sending 873db8dac20SDavid S. Miller */ 874db8dac20SDavid S. Miller 875db8dac20SDavid S. Miller static int udp_v6_push_pending_frames(struct sock *sk) 876db8dac20SDavid S. Miller { 877db8dac20SDavid S. Miller struct sk_buff *skb; 878db8dac20SDavid S. Miller struct udphdr *uh; 879db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 880db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 881db8dac20SDavid S. Miller struct flowi *fl = &inet->cork.fl; 882db8dac20SDavid S. Miller int err = 0; 883db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 884db8dac20SDavid S. Miller __wsum csum = 0; 885db8dac20SDavid S. Miller 886db8dac20SDavid S. Miller /* Grab the skbuff where UDP header space exists. */ 887db8dac20SDavid S. Miller if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 888db8dac20SDavid S. Miller goto out; 889db8dac20SDavid S. Miller 890db8dac20SDavid S. Miller /* 891db8dac20SDavid S. Miller * Create a UDP header 892db8dac20SDavid S. Miller */ 893db8dac20SDavid S. Miller uh = udp_hdr(skb); 894db8dac20SDavid S. Miller uh->source = fl->fl_ip_sport; 895db8dac20SDavid S. Miller uh->dest = fl->fl_ip_dport; 896db8dac20SDavid S. Miller uh->len = htons(up->len); 897db8dac20SDavid S. Miller uh->check = 0; 898db8dac20SDavid S. Miller 899db8dac20SDavid S. Miller if (is_udplite) 900db8dac20SDavid S. Miller csum = udplite_csum_outgoing(sk, skb); 901493c6be3SSridhar Samudrala else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 902493c6be3SSridhar Samudrala udp6_hwcsum_outgoing(sk, skb, &fl->fl6_src, &fl->fl6_dst, 903493c6be3SSridhar Samudrala up->len); 904493c6be3SSridhar Samudrala goto send; 905493c6be3SSridhar Samudrala } else 906db8dac20SDavid S. Miller csum = udp_csum_outgoing(sk, skb); 907db8dac20SDavid S. Miller 908db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 909db8dac20SDavid S. Miller uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, 910db8dac20SDavid S. Miller up->len, fl->proto, csum ); 911db8dac20SDavid S. Miller if (uh->check == 0) 912db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 913db8dac20SDavid S. Miller 914493c6be3SSridhar Samudrala send: 915db8dac20SDavid S. Miller err = ip6_push_pending_frames(sk); 9166ce9e7b5SEric Dumazet if (err) { 9176ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 9186ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9196ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 9206ce9e7b5SEric Dumazet err = 0; 9216ce9e7b5SEric Dumazet } 9226ce9e7b5SEric Dumazet } else 9236ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9246ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 925db8dac20SDavid S. Miller out: 926db8dac20SDavid S. Miller up->len = 0; 927db8dac20SDavid S. Miller up->pending = 0; 928db8dac20SDavid S. Miller return err; 929db8dac20SDavid S. Miller } 930db8dac20SDavid S. Miller 931db8dac20SDavid S. Miller int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, 932db8dac20SDavid S. Miller struct msghdr *msg, size_t len) 933db8dac20SDavid S. Miller { 934db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 935db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 936db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 937db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 938db8dac20SDavid S. Miller struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; 93920c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 940db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 941db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 942db8dac20SDavid S. Miller struct flowi fl; 943db8dac20SDavid S. Miller struct dst_entry *dst; 944db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 945db8dac20SDavid S. Miller int ulen = len; 946db8dac20SDavid S. Miller int hlimit = -1; 947db8dac20SDavid S. Miller int tclass = -1; 94813b52cd4SBrian Haley int dontfrag = -1; 949db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 950db8dac20SDavid S. Miller int err; 951db8dac20SDavid S. Miller int connected = 0; 952db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 953db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 954db8dac20SDavid S. Miller 955db8dac20SDavid S. Miller /* destination address check */ 956db8dac20SDavid S. Miller if (sin6) { 957db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 958db8dac20SDavid S. Miller return -EINVAL; 959db8dac20SDavid S. Miller 960db8dac20SDavid S. Miller switch (sin6->sin6_family) { 961db8dac20SDavid S. Miller case AF_INET6: 962db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 963db8dac20SDavid S. Miller return -EINVAL; 964db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 965db8dac20SDavid S. Miller break; 966db8dac20SDavid S. Miller case AF_INET: 967db8dac20SDavid S. Miller goto do_udp_sendmsg; 968db8dac20SDavid S. Miller case AF_UNSPEC: 969db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 970db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 971db8dac20SDavid S. Miller daddr = NULL; 972db8dac20SDavid S. Miller break; 973db8dac20SDavid S. Miller default: 974db8dac20SDavid S. Miller return -EINVAL; 975db8dac20SDavid S. Miller } 976db8dac20SDavid S. Miller } else if (!up->pending) { 977db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 978db8dac20SDavid S. Miller return -EDESTADDRREQ; 979db8dac20SDavid S. Miller daddr = &np->daddr; 980db8dac20SDavid S. Miller } else 981db8dac20SDavid S. Miller daddr = NULL; 982db8dac20SDavid S. Miller 983db8dac20SDavid S. Miller if (daddr) { 984db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 985db8dac20SDavid S. Miller struct sockaddr_in sin; 986db8dac20SDavid S. Miller sin.sin_family = AF_INET; 987c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 988db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 989db8dac20SDavid S. Miller msg->msg_name = &sin; 990db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 991db8dac20SDavid S. Miller do_udp_sendmsg: 992db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 993db8dac20SDavid S. Miller return -ENETUNREACH; 994db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 995db8dac20SDavid S. Miller } 996db8dac20SDavid S. Miller } 997db8dac20SDavid S. Miller 998db8dac20SDavid S. Miller if (up->pending == AF_INET) 999db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1000db8dac20SDavid S. Miller 1001db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1002db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1003db8dac20SDavid S. Miller */ 1004db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1005db8dac20SDavid S. Miller return -EMSGSIZE; 1006db8dac20SDavid S. Miller 1007db8dac20SDavid S. Miller if (up->pending) { 1008db8dac20SDavid S. Miller /* 1009db8dac20SDavid S. Miller * There are pending frames. 1010db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1011db8dac20SDavid S. Miller */ 1012db8dac20SDavid S. Miller lock_sock(sk); 1013db8dac20SDavid S. Miller if (likely(up->pending)) { 1014db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1015db8dac20SDavid S. Miller release_sock(sk); 1016db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1017db8dac20SDavid S. Miller } 1018db8dac20SDavid S. Miller dst = NULL; 1019db8dac20SDavid S. Miller goto do_append_data; 1020db8dac20SDavid S. Miller } 1021db8dac20SDavid S. Miller release_sock(sk); 1022db8dac20SDavid S. Miller } 1023db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1024db8dac20SDavid S. Miller 1025db8dac20SDavid S. Miller memset(&fl, 0, sizeof(fl)); 1026db8dac20SDavid S. Miller 1027db8dac20SDavid S. Miller if (sin6) { 1028db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1029db8dac20SDavid S. Miller return -EINVAL; 1030db8dac20SDavid S. Miller 1031db8dac20SDavid S. Miller fl.fl_ip_dport = sin6->sin6_port; 1032db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1033db8dac20SDavid S. Miller 1034db8dac20SDavid S. Miller if (np->sndflow) { 1035db8dac20SDavid S. Miller fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 1036db8dac20SDavid S. Miller if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { 1037db8dac20SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); 1038db8dac20SDavid S. Miller if (flowlabel == NULL) 1039db8dac20SDavid S. Miller return -EINVAL; 1040db8dac20SDavid S. Miller daddr = &flowlabel->dst; 1041db8dac20SDavid S. Miller } 1042db8dac20SDavid S. Miller } 1043db8dac20SDavid S. Miller 1044db8dac20SDavid S. Miller /* 1045db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1046db8dac20SDavid S. Miller * sk->sk_dst_cache. 1047db8dac20SDavid S. Miller */ 1048db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1049db8dac20SDavid S. Miller ipv6_addr_equal(daddr, &np->daddr)) 1050db8dac20SDavid S. Miller daddr = &np->daddr; 1051db8dac20SDavid S. Miller 1052db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1053db8dac20SDavid S. Miller sin6->sin6_scope_id && 1054db8dac20SDavid S. Miller ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) 1055db8dac20SDavid S. Miller fl.oif = sin6->sin6_scope_id; 1056db8dac20SDavid S. Miller } else { 1057db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1058db8dac20SDavid S. Miller return -EDESTADDRREQ; 1059db8dac20SDavid S. Miller 1060c720c7e8SEric Dumazet fl.fl_ip_dport = inet->inet_dport; 1061db8dac20SDavid S. Miller daddr = &np->daddr; 1062db8dac20SDavid S. Miller fl.fl6_flowlabel = np->flow_label; 1063db8dac20SDavid S. Miller connected = 1; 1064db8dac20SDavid S. Miller } 1065db8dac20SDavid S. Miller 1066db8dac20SDavid S. Miller if (!fl.oif) 1067db8dac20SDavid S. Miller fl.oif = sk->sk_bound_dev_if; 1068db8dac20SDavid S. Miller 10699f690db7SYang Hongyang if (!fl.oif) 10709f690db7SYang Hongyang fl.oif = np->sticky_pktinfo.ipi6_ifindex; 10719f690db7SYang Hongyang 107251953d5bSBrian Haley fl.mark = sk->sk_mark; 107351953d5bSBrian Haley 1074db8dac20SDavid S. Miller if (msg->msg_controllen) { 1075db8dac20SDavid S. Miller opt = &opt_space; 1076db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1077db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 1078db8dac20SDavid S. Miller 107913b52cd4SBrian Haley err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, 108013b52cd4SBrian Haley &tclass, &dontfrag); 1081db8dac20SDavid S. Miller if (err < 0) { 1082db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1083db8dac20SDavid S. Miller return err; 1084db8dac20SDavid S. Miller } 1085db8dac20SDavid S. Miller if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 1086db8dac20SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); 1087db8dac20SDavid S. Miller if (flowlabel == NULL) 1088db8dac20SDavid S. Miller return -EINVAL; 1089db8dac20SDavid S. Miller } 1090db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1091db8dac20SDavid S. Miller opt = NULL; 1092db8dac20SDavid S. Miller connected = 0; 1093db8dac20SDavid S. Miller } 1094db8dac20SDavid S. Miller if (opt == NULL) 1095db8dac20SDavid S. Miller opt = np->opt; 1096db8dac20SDavid S. Miller if (flowlabel) 1097db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1098db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 1099db8dac20SDavid S. Miller 1100db8dac20SDavid S. Miller fl.proto = sk->sk_protocol; 1101876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 1102db8dac20SDavid S. Miller ipv6_addr_copy(&fl.fl6_dst, daddr); 1103876c7f41SBrian Haley else 1104876c7f41SBrian Haley fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 1105db8dac20SDavid S. Miller if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) 1106db8dac20SDavid S. Miller ipv6_addr_copy(&fl.fl6_src, &np->saddr); 1107c720c7e8SEric Dumazet fl.fl_ip_sport = inet->inet_sport; 1108db8dac20SDavid S. Miller 110920c59de2SArnaud Ebalard final_p = fl6_update_dst(&fl, opt, &final); 111020c59de2SArnaud Ebalard if (final_p) 1111db8dac20SDavid S. Miller connected = 0; 1112db8dac20SDavid S. Miller 1113db8dac20SDavid S. Miller if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { 1114db8dac20SDavid S. Miller fl.oif = np->mcast_oif; 1115db8dac20SDavid S. Miller connected = 0; 1116db8dac20SDavid S. Miller } 1117db8dac20SDavid S. Miller 1118db8dac20SDavid S. Miller security_sk_classify_flow(sk, &fl); 1119db8dac20SDavid S. Miller 1120db8dac20SDavid S. Miller err = ip6_sk_dst_lookup(sk, &dst, &fl); 1121db8dac20SDavid S. Miller if (err) 1122db8dac20SDavid S. Miller goto out; 1123db8dac20SDavid S. Miller if (final_p) 1124db8dac20SDavid S. Miller ipv6_addr_copy(&fl.fl6_dst, final_p); 1125db8dac20SDavid S. Miller 112652479b62SAlexey Dobriyan err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); 112752479b62SAlexey Dobriyan if (err < 0) { 1128db8dac20SDavid S. Miller if (err == -EREMOTE) 1129db8dac20SDavid S. Miller err = ip6_dst_blackhole(sk, &dst, &fl); 1130db8dac20SDavid S. Miller if (err < 0) 1131db8dac20SDavid S. Miller goto out; 1132db8dac20SDavid S. Miller } 1133db8dac20SDavid S. Miller 1134db8dac20SDavid S. Miller if (hlimit < 0) { 1135db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(&fl.fl6_dst)) 1136db8dac20SDavid S. Miller hlimit = np->mcast_hops; 1137db8dac20SDavid S. Miller else 1138db8dac20SDavid S. Miller hlimit = np->hop_limit; 1139db8dac20SDavid S. Miller if (hlimit < 0) 11406b75d090SYOSHIFUJI Hideaki hlimit = ip6_dst_hoplimit(dst); 1141db8dac20SDavid S. Miller } 1142db8dac20SDavid S. Miller 1143db8dac20SDavid S. Miller if (tclass < 0) 1144e651f03aSGerrit Renker tclass = np->tclass; 1145db8dac20SDavid S. Miller 114613b52cd4SBrian Haley if (dontfrag < 0) 114713b52cd4SBrian Haley dontfrag = np->dontfrag; 114813b52cd4SBrian Haley 1149db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1150db8dac20SDavid S. Miller goto do_confirm; 1151db8dac20SDavid S. Miller back_from_confirm: 1152db8dac20SDavid S. Miller 1153db8dac20SDavid S. Miller lock_sock(sk); 1154db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1155db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1156db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1157db8dac20SDavid S. Miller release_sock(sk); 1158db8dac20SDavid S. Miller 1159db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); 1160db8dac20SDavid S. Miller err = -EINVAL; 1161db8dac20SDavid S. Miller goto out; 1162db8dac20SDavid S. Miller } 1163db8dac20SDavid S. Miller 1164db8dac20SDavid S. Miller up->pending = AF_INET6; 1165db8dac20SDavid S. Miller 1166db8dac20SDavid S. Miller do_append_data: 1167db8dac20SDavid S. Miller up->len += ulen; 1168db8dac20SDavid S. Miller getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1169db8dac20SDavid S. Miller err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, 1170db8dac20SDavid S. Miller sizeof(struct udphdr), hlimit, tclass, opt, &fl, 1171db8dac20SDavid S. Miller (struct rt6_info*)dst, 117213b52cd4SBrian Haley corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); 1173db8dac20SDavid S. Miller if (err) 1174db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1175db8dac20SDavid S. Miller else if (!corkreq) 1176db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1177db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1178db8dac20SDavid S. Miller up->pending = 0; 1179db8dac20SDavid S. Miller 1180db8dac20SDavid S. Miller if (dst) { 1181db8dac20SDavid S. Miller if (connected) { 1182db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 1183db8dac20SDavid S. Miller ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? 1184db8dac20SDavid S. Miller &np->daddr : NULL, 1185db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 1186db8dac20SDavid S. Miller ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? 1187db8dac20SDavid S. Miller &np->saddr : 1188db8dac20SDavid S. Miller #endif 1189db8dac20SDavid S. Miller NULL); 1190db8dac20SDavid S. Miller } else { 1191db8dac20SDavid S. Miller dst_release(dst); 1192db8dac20SDavid S. Miller } 1193a3c96089SYOSHIFUJI Hideaki dst = NULL; 1194db8dac20SDavid S. Miller } 1195db8dac20SDavid S. Miller 1196db8dac20SDavid S. Miller if (err > 0) 1197db8dac20SDavid S. Miller err = np->recverr ? net_xmit_errno(err) : 0; 1198db8dac20SDavid S. Miller release_sock(sk); 1199db8dac20SDavid S. Miller out: 1200a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1201db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1202db8dac20SDavid S. Miller if (!err) 1203db8dac20SDavid S. Miller return len; 1204db8dac20SDavid S. Miller /* 1205db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1206db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1207db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1208db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1209db8dac20SDavid S. Miller * seems like overkill. 1210db8dac20SDavid S. Miller */ 1211db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 1212235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 1213235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1214db8dac20SDavid S. Miller } 1215db8dac20SDavid S. Miller return err; 1216db8dac20SDavid S. Miller 1217db8dac20SDavid S. Miller do_confirm: 1218db8dac20SDavid S. Miller dst_confirm(dst); 1219db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1220db8dac20SDavid S. Miller goto back_from_confirm; 1221db8dac20SDavid S. Miller err = 0; 1222db8dac20SDavid S. Miller goto out; 1223db8dac20SDavid S. Miller } 1224db8dac20SDavid S. Miller 12257d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1226db8dac20SDavid S. Miller { 1227db8dac20SDavid S. Miller lock_sock(sk); 1228db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1229db8dac20SDavid S. Miller release_sock(sk); 1230db8dac20SDavid S. Miller 1231db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1232db8dac20SDavid S. Miller } 1233db8dac20SDavid S. Miller 1234db8dac20SDavid S. Miller /* 1235db8dac20SDavid S. Miller * Socket option code for UDP 1236db8dac20SDavid S. Miller */ 1237db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1238b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1239db8dac20SDavid S. Miller { 1240db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1241db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1242db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1243db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1244db8dac20SDavid S. Miller } 1245db8dac20SDavid S. Miller 1246db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1247db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1248b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1249db8dac20SDavid S. Miller { 1250db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1251db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1252db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1253db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1254db8dac20SDavid S. Miller } 1255db8dac20SDavid S. Miller #endif 1256db8dac20SDavid S. Miller 1257db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1258db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1259db8dac20SDavid S. Miller { 1260db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1261db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1262db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1263db8dac20SDavid S. Miller } 1264db8dac20SDavid S. Miller 1265db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1266db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1267db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1268db8dac20SDavid S. Miller { 1269db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1270db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1271db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1272db8dac20SDavid S. Miller } 1273db8dac20SDavid S. Miller #endif 1274db8dac20SDavid S. Miller 1275ba735425SSridhar Samudrala static int udp6_ufo_send_check(struct sk_buff *skb) 1276ba735425SSridhar Samudrala { 1277ba735425SSridhar Samudrala struct ipv6hdr *ipv6h; 1278ba735425SSridhar Samudrala struct udphdr *uh; 1279ba735425SSridhar Samudrala 1280ba735425SSridhar Samudrala if (!pskb_may_pull(skb, sizeof(*uh))) 1281ba735425SSridhar Samudrala return -EINVAL; 1282ba735425SSridhar Samudrala 1283ba735425SSridhar Samudrala ipv6h = ipv6_hdr(skb); 1284ba735425SSridhar Samudrala uh = udp_hdr(skb); 1285ba735425SSridhar Samudrala 1286ba735425SSridhar Samudrala uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, 1287ba735425SSridhar Samudrala IPPROTO_UDP, 0); 1288ba735425SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 1289ba735425SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 1290ba735425SSridhar Samudrala skb->ip_summed = CHECKSUM_PARTIAL; 1291ba735425SSridhar Samudrala return 0; 1292ba735425SSridhar Samudrala } 1293ba735425SSridhar Samudrala 1294ba735425SSridhar Samudrala static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, int features) 1295ba735425SSridhar Samudrala { 1296ba735425SSridhar Samudrala struct sk_buff *segs = ERR_PTR(-EINVAL); 1297ba735425SSridhar Samudrala unsigned int mss; 1298ba735425SSridhar Samudrala unsigned int unfrag_ip6hlen, unfrag_len; 1299ba735425SSridhar Samudrala struct frag_hdr *fptr; 1300ba735425SSridhar Samudrala u8 *mac_start, *prevhdr; 1301ba735425SSridhar Samudrala u8 nexthdr; 1302ba735425SSridhar Samudrala u8 frag_hdr_sz = sizeof(struct frag_hdr); 1303ba735425SSridhar Samudrala int offset; 1304ba735425SSridhar Samudrala __wsum csum; 1305ba735425SSridhar Samudrala 1306ba735425SSridhar Samudrala mss = skb_shinfo(skb)->gso_size; 1307ba735425SSridhar Samudrala if (unlikely(skb->len <= mss)) 1308ba735425SSridhar Samudrala goto out; 1309ba735425SSridhar Samudrala 1310ba735425SSridhar Samudrala if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { 1311ba735425SSridhar Samudrala /* Packet is from an untrusted source, reset gso_segs. */ 1312ba735425SSridhar Samudrala int type = skb_shinfo(skb)->gso_type; 1313ba735425SSridhar Samudrala 1314ba735425SSridhar Samudrala if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || 1315ba735425SSridhar Samudrala !(type & (SKB_GSO_UDP)))) 1316ba735425SSridhar Samudrala goto out; 1317ba735425SSridhar Samudrala 1318ba735425SSridhar Samudrala skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); 1319ba735425SSridhar Samudrala 1320ba735425SSridhar Samudrala segs = NULL; 1321ba735425SSridhar Samudrala goto out; 1322ba735425SSridhar Samudrala } 1323ba735425SSridhar Samudrala 1324ba735425SSridhar Samudrala /* Do software UFO. Complete and fill in the UDP checksum as HW cannot 1325ba735425SSridhar Samudrala * do checksum of UDP packets sent as multiple IP fragments. 1326ba735425SSridhar Samudrala */ 1327ba735425SSridhar Samudrala offset = skb->csum_start - skb_headroom(skb); 1328ba735425SSridhar Samudrala csum = skb_checksum(skb, offset, skb->len- offset, 0); 1329ba735425SSridhar Samudrala offset += skb->csum_offset; 1330ba735425SSridhar Samudrala *(__sum16 *)(skb->data + offset) = csum_fold(csum); 1331ba735425SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 1332ba735425SSridhar Samudrala 1333ba735425SSridhar Samudrala /* Check if there is enough headroom to insert fragment header. */ 1334ba735425SSridhar Samudrala if ((skb_headroom(skb) < frag_hdr_sz) && 1335ba735425SSridhar Samudrala pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) 1336ba735425SSridhar Samudrala goto out; 1337ba735425SSridhar Samudrala 1338ba735425SSridhar Samudrala /* Find the unfragmentable header and shift it left by frag_hdr_sz 1339ba735425SSridhar Samudrala * bytes to insert fragment header. 1340ba735425SSridhar Samudrala */ 1341ba735425SSridhar Samudrala unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); 1342ba735425SSridhar Samudrala nexthdr = *prevhdr; 1343ba735425SSridhar Samudrala *prevhdr = NEXTHDR_FRAGMENT; 1344ba735425SSridhar Samudrala unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + 1345ba735425SSridhar Samudrala unfrag_ip6hlen; 1346ba735425SSridhar Samudrala mac_start = skb_mac_header(skb); 1347ba735425SSridhar Samudrala memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); 1348ba735425SSridhar Samudrala 1349ba735425SSridhar Samudrala skb->mac_header -= frag_hdr_sz; 1350ba735425SSridhar Samudrala skb->network_header -= frag_hdr_sz; 1351ba735425SSridhar Samudrala 1352ba735425SSridhar Samudrala fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); 1353ba735425SSridhar Samudrala fptr->nexthdr = nexthdr; 1354ba735425SSridhar Samudrala fptr->reserved = 0; 1355ba735425SSridhar Samudrala ipv6_select_ident(fptr); 1356ba735425SSridhar Samudrala 1357ba735425SSridhar Samudrala /* Fragment the skb. ipv6 header and the remaining fields of the 1358ba735425SSridhar Samudrala * fragment header are updated in ipv6_gso_segment() 1359ba735425SSridhar Samudrala */ 1360ba735425SSridhar Samudrala segs = skb_segment(skb, features); 1361ba735425SSridhar Samudrala 1362ba735425SSridhar Samudrala out: 1363ba735425SSridhar Samudrala return segs; 1364ba735425SSridhar Samudrala } 1365ba735425SSridhar Samudrala 136641135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1367db8dac20SDavid S. Miller .handler = udpv6_rcv, 1368db8dac20SDavid S. Miller .err_handler = udpv6_err, 1369ba735425SSridhar Samudrala .gso_send_check = udp6_ufo_send_check, 1370ba735425SSridhar Samudrala .gso_segment = udp6_ufo_fragment, 1371db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1372db8dac20SDavid S. Miller }; 1373db8dac20SDavid S. Miller 1374db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1375db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1376db8dac20SDavid S. Miller 1377db8dac20SDavid S. Miller static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) 1378db8dac20SDavid S. Miller { 1379db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sp); 1380db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sp); 1381db8dac20SDavid S. Miller struct in6_addr *dest, *src; 1382db8dac20SDavid S. Miller __u16 destp, srcp; 1383db8dac20SDavid S. Miller 1384db8dac20SDavid S. Miller dest = &np->daddr; 1385db8dac20SDavid S. Miller src = &np->rcv_saddr; 1386c720c7e8SEric Dumazet destp = ntohs(inet->inet_dport); 1387c720c7e8SEric Dumazet srcp = ntohs(inet->inet_sport); 1388db8dac20SDavid S. Miller seq_printf(seq, 1389f86dcc5aSEric Dumazet "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 1390cb61cb9bSEric Dumazet "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", 1391db8dac20SDavid S. Miller bucket, 1392db8dac20SDavid S. Miller src->s6_addr32[0], src->s6_addr32[1], 1393db8dac20SDavid S. Miller src->s6_addr32[2], src->s6_addr32[3], srcp, 1394db8dac20SDavid S. Miller dest->s6_addr32[0], dest->s6_addr32[1], 1395db8dac20SDavid S. Miller dest->s6_addr32[2], dest->s6_addr32[3], destp, 1396db8dac20SDavid S. Miller sp->sk_state, 139731e6d363SEric Dumazet sk_wmem_alloc_get(sp), 139831e6d363SEric Dumazet sk_rmem_alloc_get(sp), 1399db8dac20SDavid S. Miller 0, 0L, 0, 1400db8dac20SDavid S. Miller sock_i_uid(sp), 0, 1401db8dac20SDavid S. Miller sock_i_ino(sp), 1402cb61cb9bSEric Dumazet atomic_read(&sp->sk_refcnt), sp, 1403cb61cb9bSEric Dumazet atomic_read(&sp->sk_drops)); 1404db8dac20SDavid S. Miller } 1405db8dac20SDavid S. Miller 1406db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1407db8dac20SDavid S. Miller { 1408db8dac20SDavid S. Miller if (v == SEQ_START_TOKEN) 1409db8dac20SDavid S. Miller seq_printf(seq, 1410db8dac20SDavid S. Miller " sl " 1411db8dac20SDavid S. Miller "local_address " 1412db8dac20SDavid S. Miller "remote_address " 1413db8dac20SDavid S. Miller "st tx_queue rx_queue tr tm->when retrnsmt" 1414cb61cb9bSEric Dumazet " uid timeout inode ref pointer drops\n"); 1415db8dac20SDavid S. Miller else 1416db8dac20SDavid S. Miller udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); 1417db8dac20SDavid S. Miller return 0; 1418db8dac20SDavid S. Miller } 1419db8dac20SDavid S. Miller 1420db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1421db8dac20SDavid S. Miller .name = "udp6", 1422db8dac20SDavid S. Miller .family = AF_INET6, 1423645ca708SEric Dumazet .udp_table = &udp_table, 14244ad96d39SDenis V. Lunev .seq_fops = { 14254ad96d39SDenis V. Lunev .owner = THIS_MODULE, 14264ad96d39SDenis V. Lunev }, 1427dda61925SDenis V. Lunev .seq_ops = { 1428dda61925SDenis V. Lunev .show = udp6_seq_show, 1429dda61925SDenis V. Lunev }, 1430db8dac20SDavid S. Miller }; 1431db8dac20SDavid S. Miller 14322c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1433db8dac20SDavid S. Miller { 14340c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1435db8dac20SDavid S. Miller } 1436db8dac20SDavid S. Miller 14370c96d8c5SDaniel Lezcano void udp6_proc_exit(struct net *net) { 14380c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1439db8dac20SDavid S. Miller } 1440db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1441db8dac20SDavid S. Miller 1442db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1443db8dac20SDavid S. Miller 1444db8dac20SDavid S. Miller struct proto udpv6_prot = { 1445db8dac20SDavid S. Miller .name = "UDPv6", 1446db8dac20SDavid S. Miller .owner = THIS_MODULE, 1447db8dac20SDavid S. Miller .close = udp_lib_close, 1448db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1449db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1450db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1451db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1452db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1453db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1454db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1455db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1456db8dac20SDavid S. Miller .backlog_rcv = udpv6_queue_rcv_skb, 1457db8dac20SDavid S. Miller .hash = udp_lib_hash, 1458db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1459719f8358SEric Dumazet .rehash = udp_v6_rehash, 1460db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1461db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1462db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1463db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1464db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1465db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1466271b72c7SEric Dumazet .slab_flags = SLAB_DESTROY_BY_RCU, 1467645ca708SEric Dumazet .h.udp_table = &udp_table, 1468db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1469db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1470db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1471db8dac20SDavid S. Miller #endif 1472db8dac20SDavid S. Miller }; 1473db8dac20SDavid S. Miller 1474db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1475db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1476db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1477db8dac20SDavid S. Miller .prot = &udpv6_prot, 1478db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1479db8dac20SDavid S. Miller .no_check = UDP_CSUM_DEFAULT, 1480db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1481db8dac20SDavid S. Miller }; 1482db8dac20SDavid S. Miller 1483db8dac20SDavid S. Miller 1484db8dac20SDavid S. Miller int __init udpv6_init(void) 1485db8dac20SDavid S. Miller { 1486db8dac20SDavid S. Miller int ret; 1487db8dac20SDavid S. Miller 1488db8dac20SDavid S. Miller ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 1489db8dac20SDavid S. Miller if (ret) 1490db8dac20SDavid S. Miller goto out; 1491db8dac20SDavid S. Miller 1492db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1493db8dac20SDavid S. Miller if (ret) 1494db8dac20SDavid S. Miller goto out_udpv6_protocol; 1495db8dac20SDavid S. Miller out: 1496db8dac20SDavid S. Miller return ret; 1497db8dac20SDavid S. Miller 1498db8dac20SDavid S. Miller out_udpv6_protocol: 1499db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1500db8dac20SDavid S. Miller goto out; 1501db8dac20SDavid S. Miller } 1502db8dac20SDavid S. Miller 1503db8dac20SDavid S. Miller void udpv6_exit(void) 1504db8dac20SDavid S. Miller { 1505db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1506db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1507db8dac20SDavid S. Miller } 1508