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); 5768835abaSEric Dumazet __be32 sk1_rcv_saddr = sk_rcv_saddr(sk); 5868835abaSEric Dumazet __be32 sk2_rcv_saddr = sk_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: 230c31504dcSEric Dumazet if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) 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) { 297c31504dcSEric Dumazet if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) 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; 314b71d1d42SEric Dumazet const 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 323aa976fc0SBalazs Scheidler struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, 324aa976fc0SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, int dif) 325aa976fc0SBalazs Scheidler { 326aa976fc0SBalazs Scheidler return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); 327aa976fc0SBalazs Scheidler } 328aa976fc0SBalazs Scheidler EXPORT_SYMBOL_GPL(udp6_lib_lookup); 329aa976fc0SBalazs Scheidler 330aa976fc0SBalazs Scheidler 331db8dac20SDavid S. Miller /* 332db8dac20SDavid S. Miller * This should be easy, if there is something there we 333db8dac20SDavid S. Miller * return it, otherwise we block. 334db8dac20SDavid S. Miller */ 335db8dac20SDavid S. Miller 336db8dac20SDavid S. Miller int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, 337db8dac20SDavid S. Miller struct msghdr *msg, size_t len, 338db8dac20SDavid S. Miller int noblock, int flags, int *addr_len) 339db8dac20SDavid S. Miller { 340db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 341db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 342db8dac20SDavid S. Miller struct sk_buff *skb; 34381d54ec8SGerrit Renker unsigned int ulen; 344db8dac20SDavid S. Miller int peeked; 345db8dac20SDavid S. Miller int err; 346db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 347f26ba175SWei Yongjun int is_udp4; 3488a74ad60SEric Dumazet bool slow; 349db8dac20SDavid S. Miller 350db8dac20SDavid S. Miller if (addr_len) 351db8dac20SDavid S. Miller *addr_len=sizeof(struct sockaddr_in6); 352db8dac20SDavid S. Miller 353db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 354db8dac20SDavid S. Miller return ipv6_recv_error(sk, msg, len); 355db8dac20SDavid S. Miller 3564b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 3574b340ae2SBrian Haley return ipv6_recv_rxpmtu(sk, msg, len); 3584b340ae2SBrian Haley 359db8dac20SDavid S. Miller try_again: 360db8dac20SDavid S. Miller skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), 361db8dac20SDavid S. Miller &peeked, &err); 362db8dac20SDavid S. Miller if (!skb) 363db8dac20SDavid S. Miller goto out; 364db8dac20SDavid S. Miller 365db8dac20SDavid S. Miller ulen = skb->len - sizeof(struct udphdr); 36681d54ec8SGerrit Renker if (len > ulen) 36781d54ec8SGerrit Renker len = ulen; 36881d54ec8SGerrit Renker else if (len < ulen) 369db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 370db8dac20SDavid S. Miller 371f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 372f26ba175SWei Yongjun 373db8dac20SDavid S. Miller /* 374db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 375db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 376db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 377db8dac20SDavid S. Miller */ 378db8dac20SDavid S. Miller 37981d54ec8SGerrit Renker if (len < ulen || UDP_SKB_CB(skb)->partial_cov) { 380db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 381db8dac20SDavid S. Miller goto csum_copy_err; 382db8dac20SDavid S. Miller } 383db8dac20SDavid S. Miller 384db8dac20SDavid S. Miller if (skb_csum_unnecessary(skb)) 385db8dac20SDavid S. Miller err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), 38681d54ec8SGerrit Renker msg->msg_iov,len); 387db8dac20SDavid S. Miller else { 388db8dac20SDavid S. Miller err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); 389db8dac20SDavid S. Miller if (err == -EINVAL) 390db8dac20SDavid S. Miller goto csum_copy_err; 391db8dac20SDavid S. Miller } 392db8dac20SDavid S. Miller if (err) 393db8dac20SDavid S. Miller goto out_free; 394db8dac20SDavid S. Miller 395f26ba175SWei Yongjun if (!peeked) { 396f26ba175SWei Yongjun if (is_udp4) 397f26ba175SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 398f26ba175SWei Yongjun UDP_MIB_INDATAGRAMS, is_udplite); 399f26ba175SWei Yongjun else 400235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 401235b9f7aSPavel Emelyanov UDP_MIB_INDATAGRAMS, is_udplite); 402f26ba175SWei Yongjun } 403db8dac20SDavid S. Miller 4043b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 405db8dac20SDavid S. Miller 406db8dac20SDavid S. Miller /* Copy the address. */ 407db8dac20SDavid S. Miller if (msg->msg_name) { 408db8dac20SDavid S. Miller struct sockaddr_in6 *sin6; 409db8dac20SDavid S. Miller 410db8dac20SDavid S. Miller sin6 = (struct sockaddr_in6 *) msg->msg_name; 411db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 412db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 413db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 414db8dac20SDavid S. Miller sin6->sin6_scope_id = 0; 415db8dac20SDavid S. Miller 416f26ba175SWei Yongjun if (is_udp4) 417b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 418b301e82cSBrian Haley &sin6->sin6_addr); 419db8dac20SDavid S. Miller else { 420db8dac20SDavid S. Miller ipv6_addr_copy(&sin6->sin6_addr, 421db8dac20SDavid S. Miller &ipv6_hdr(skb)->saddr); 422db8dac20SDavid S. Miller if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 423db8dac20SDavid S. Miller sin6->sin6_scope_id = IP6CB(skb)->iif; 424db8dac20SDavid S. Miller } 425db8dac20SDavid S. Miller 426db8dac20SDavid S. Miller } 427f26ba175SWei Yongjun if (is_udp4) { 428db8dac20SDavid S. Miller if (inet->cmsg_flags) 429db8dac20SDavid S. Miller ip_cmsg_recv(msg, skb); 430db8dac20SDavid S. Miller } else { 431db8dac20SDavid S. Miller if (np->rxopt.all) 432db8dac20SDavid S. Miller datagram_recv_ctl(sk, msg, skb); 433db8dac20SDavid S. Miller } 434db8dac20SDavid S. Miller 43581d54ec8SGerrit Renker err = len; 436db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 437db8dac20SDavid S. Miller err = ulen; 438db8dac20SDavid S. Miller 439db8dac20SDavid S. Miller out_free: 4409d410c79SEric Dumazet skb_free_datagram_locked(sk, skb); 441db8dac20SDavid S. Miller out: 442db8dac20SDavid S. Miller return err; 443db8dac20SDavid S. Miller 444db8dac20SDavid S. Miller csum_copy_err: 4458a74ad60SEric Dumazet slow = lock_sock_fast(sk); 4460856f939SWei Yongjun if (!skb_kill_datagram(sk, skb, flags)) { 4470856f939SWei Yongjun if (is_udp4) 4480856f939SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 4490856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4500856f939SWei Yongjun else 4510856f939SWei Yongjun UDP6_INC_STATS_USER(sock_net(sk), 4520856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4530856f939SWei Yongjun } 4548a74ad60SEric Dumazet unlock_sock_fast(sk, slow); 455db8dac20SDavid S. Miller 456db8dac20SDavid S. Miller if (flags & MSG_DONTWAIT) 457db8dac20SDavid S. Miller return -EAGAIN; 458db8dac20SDavid S. Miller goto try_again; 459db8dac20SDavid S. Miller } 460db8dac20SDavid S. Miller 461db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 462d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 463645ca708SEric Dumazet struct udp_table *udptable) 464db8dac20SDavid S. Miller { 465db8dac20SDavid S. Miller struct ipv6_pinfo *np; 466b71d1d42SEric Dumazet const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; 467b71d1d42SEric Dumazet const struct in6_addr *saddr = &hdr->saddr; 468b71d1d42SEric Dumazet const struct in6_addr *daddr = &hdr->daddr; 469db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr*)(skb->data+offset); 470db8dac20SDavid S. Miller struct sock *sk; 471db8dac20SDavid S. Miller int err; 472db8dac20SDavid S. Miller 473c346dca1SYOSHIFUJI Hideaki sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, 474db8dac20SDavid S. Miller saddr, uh->source, inet6_iif(skb), udptable); 475db8dac20SDavid S. Miller if (sk == NULL) 476db8dac20SDavid S. Miller return; 477db8dac20SDavid S. Miller 478db8dac20SDavid S. Miller np = inet6_sk(sk); 479db8dac20SDavid S. Miller 480db8dac20SDavid S. Miller if (!icmpv6_err_convert(type, code, &err) && !np->recverr) 481db8dac20SDavid S. Miller goto out; 482db8dac20SDavid S. Miller 483db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) 484db8dac20SDavid S. Miller goto out; 485db8dac20SDavid S. Miller 486b1faf566SEric Dumazet if (np->recverr) 487db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 488b1faf566SEric Dumazet 489db8dac20SDavid S. Miller sk->sk_err = err; 490db8dac20SDavid S. Miller sk->sk_error_report(sk); 491db8dac20SDavid S. Miller out: 492db8dac20SDavid S. Miller sock_put(sk); 493db8dac20SDavid S. Miller } 494db8dac20SDavid S. Miller 495db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 496d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 497d5fdd6baSBrian Haley u8 code, int offset, __be32 info ) 498db8dac20SDavid S. Miller { 499645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 500db8dac20SDavid S. Miller } 501db8dac20SDavid S. Miller 502db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) 503db8dac20SDavid S. Miller { 504db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 505db8dac20SDavid S. Miller int rc; 506db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 507db8dac20SDavid S. Miller 50847482f13SNeil Horman if (!ipv6_addr_any(&inet6_sk(sk)->daddr)) 50947482f13SNeil Horman sock_rps_save_rxhash(sk, skb->rxhash); 51047482f13SNeil Horman 511db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 512db8dac20SDavid S. Miller goto drop; 513db8dac20SDavid S. Miller 514db8dac20SDavid S. Miller /* 515db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 516db8dac20SDavid S. Miller */ 517db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 518db8dac20SDavid S. Miller 519db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 520db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" 521db8dac20SDavid S. Miller " %d while full coverage %d requested\n", 522db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 523db8dac20SDavid S. Miller goto drop; 524db8dac20SDavid S. Miller } 525db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 526db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " 527db8dac20SDavid S. Miller "too small, need min %d\n", 528db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 529db8dac20SDavid S. Miller goto drop; 530db8dac20SDavid S. Miller } 531db8dac20SDavid S. Miller } 532db8dac20SDavid S. Miller 5330d7da9ddSEric Dumazet if (rcu_dereference_raw(sk->sk_filter)) { 534db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 535db8dac20SDavid S. Miller goto drop; 536db8dac20SDavid S. Miller } 537db8dac20SDavid S. Miller 538f84af32cSEric Dumazet if ((rc = ip_queue_rcv_skb(sk, skb)) < 0) { 539db8dac20SDavid S. Miller /* Note that an ENOMEM error is charged twice */ 540766e9037SEric Dumazet if (rc == -ENOMEM) 541ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), 542ef28d1a2SPavel Emelyanov UDP_MIB_RCVBUFERRORS, is_udplite); 5438edf19c2SEric Dumazet goto drop_no_sk_drops_inc; 544db8dac20SDavid S. Miller } 545db8dac20SDavid S. Miller 546db8dac20SDavid S. Miller return 0; 547db8dac20SDavid S. Miller drop: 5488edf19c2SEric Dumazet atomic_inc(&sk->sk_drops); 5498edf19c2SEric Dumazet drop_no_sk_drops_inc: 550ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 551db8dac20SDavid S. Miller kfree_skb(skb); 552db8dac20SDavid S. Miller return -1; 553db8dac20SDavid S. Miller } 554db8dac20SDavid S. Miller 555920a4611SEric Dumazet static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, 556b71d1d42SEric Dumazet __be16 loc_port, const struct in6_addr *loc_addr, 557b71d1d42SEric Dumazet __be16 rmt_port, const struct in6_addr *rmt_addr, 558db8dac20SDavid S. Miller int dif) 559db8dac20SDavid S. Miller { 56088ab1932SEric Dumazet struct hlist_nulls_node *node; 561db8dac20SDavid S. Miller struct sock *s = sk; 562db8dac20SDavid S. Miller unsigned short num = ntohs(loc_port); 563db8dac20SDavid S. Miller 56488ab1932SEric Dumazet sk_nulls_for_each_from(s, node) { 565db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(s); 566db8dac20SDavid S. Miller 567920a4611SEric Dumazet if (!net_eq(sock_net(s), net)) 568b8ad0cbcSDaniel Lezcano continue; 569b8ad0cbcSDaniel Lezcano 570d4cada4aSEric Dumazet if (udp_sk(s)->udp_port_hash == num && 571d4cada4aSEric Dumazet s->sk_family == PF_INET6) { 572db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(s); 573c720c7e8SEric Dumazet if (inet->inet_dport) { 574c720c7e8SEric Dumazet if (inet->inet_dport != rmt_port) 575db8dac20SDavid S. Miller continue; 576db8dac20SDavid S. Miller } 577db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr) && 578db8dac20SDavid S. Miller !ipv6_addr_equal(&np->daddr, rmt_addr)) 579db8dac20SDavid S. Miller continue; 580db8dac20SDavid S. Miller 581db8dac20SDavid S. Miller if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) 582db8dac20SDavid S. Miller continue; 583db8dac20SDavid S. Miller 584db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 585db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) 586db8dac20SDavid S. Miller continue; 587db8dac20SDavid S. Miller } 588db8dac20SDavid S. Miller if (!inet6_mc_check(s, loc_addr, rmt_addr)) 589db8dac20SDavid S. Miller continue; 590db8dac20SDavid S. Miller return s; 591db8dac20SDavid S. Miller } 592db8dac20SDavid S. Miller } 593db8dac20SDavid S. Miller return NULL; 594db8dac20SDavid S. Miller } 595db8dac20SDavid S. Miller 596a1ab77f9SEric Dumazet static void flush_stack(struct sock **stack, unsigned int count, 597a1ab77f9SEric Dumazet struct sk_buff *skb, unsigned int final) 598a1ab77f9SEric Dumazet { 599a1ab77f9SEric Dumazet unsigned int i; 600a1ab77f9SEric Dumazet struct sock *sk; 601a1ab77f9SEric Dumazet struct sk_buff *skb1; 602a1ab77f9SEric Dumazet 603a1ab77f9SEric Dumazet for (i = 0; i < count; i++) { 604a1ab77f9SEric Dumazet skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); 605a1ab77f9SEric Dumazet 606a1ab77f9SEric Dumazet sk = stack[i]; 607f6b8f32cSEric Dumazet if (skb1) { 608c0722400SJiri Pirko if (sk_rcvqueues_full(sk, skb1)) { 609c377411fSEric Dumazet kfree_skb(skb1); 610c377411fSEric Dumazet goto drop; 611c377411fSEric Dumazet } 612a1ab77f9SEric Dumazet bh_lock_sock(sk); 613a1ab77f9SEric Dumazet if (!sock_owned_by_user(sk)) 614a1ab77f9SEric Dumazet udpv6_queue_rcv_skb(sk, skb1); 615a3a858ffSZhu Yi else if (sk_add_backlog(sk, skb1)) { 61655349790SZhu Yi kfree_skb(skb1); 617a1ab77f9SEric Dumazet bh_unlock_sock(sk); 61855349790SZhu Yi goto drop; 61955349790SZhu Yi } 62055349790SZhu Yi bh_unlock_sock(sk); 62155349790SZhu Yi continue; 62255349790SZhu Yi } 62355349790SZhu Yi drop: 624f6b8f32cSEric Dumazet atomic_inc(&sk->sk_drops); 625f6b8f32cSEric Dumazet UDP6_INC_STATS_BH(sock_net(sk), 626f6b8f32cSEric Dumazet UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); 627f6b8f32cSEric Dumazet UDP6_INC_STATS_BH(sock_net(sk), 628f6b8f32cSEric Dumazet UDP_MIB_INERRORS, IS_UDPLITE(sk)); 629a1ab77f9SEric Dumazet } 630a1ab77f9SEric Dumazet } 631db8dac20SDavid S. Miller /* 632db8dac20SDavid S. Miller * Note: called only from the BH handler context, 633db8dac20SDavid S. Miller * so we don't need to lock the hashes. 634db8dac20SDavid S. Miller */ 635e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 636b71d1d42SEric Dumazet const struct in6_addr *saddr, const struct in6_addr *daddr, 637645ca708SEric Dumazet struct udp_table *udptable) 638db8dac20SDavid S. Miller { 639a1ab77f9SEric Dumazet struct sock *sk, *stack[256 / sizeof(struct sock *)]; 640db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 641f86dcc5aSEric Dumazet struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); 642db8dac20SDavid S. Miller int dif; 643a1ab77f9SEric Dumazet unsigned int i, count = 0; 644db8dac20SDavid S. Miller 645645ca708SEric Dumazet spin_lock(&hslot->lock); 64688ab1932SEric Dumazet sk = sk_nulls_head(&hslot->head); 647db8dac20SDavid S. Miller dif = inet6_iif(skb); 648920a4611SEric Dumazet sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); 649a1ab77f9SEric Dumazet while (sk) { 650a1ab77f9SEric Dumazet stack[count++] = sk; 651a1ab77f9SEric Dumazet sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, 652a1ab77f9SEric Dumazet uh->source, saddr, dif); 653a1ab77f9SEric Dumazet if (unlikely(count == ARRAY_SIZE(stack))) { 654a1ab77f9SEric Dumazet if (!sk) 655a1ab77f9SEric Dumazet break; 656a1ab77f9SEric Dumazet flush_stack(stack, count, skb, ~0); 657a1ab77f9SEric Dumazet count = 0; 658db8dac20SDavid S. Miller } 659a1ab77f9SEric Dumazet } 660a1ab77f9SEric Dumazet /* 661a1ab77f9SEric Dumazet * before releasing the lock, we must take reference on sockets 662a1ab77f9SEric Dumazet */ 663a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 664a1ab77f9SEric Dumazet sock_hold(stack[i]); 665db8dac20SDavid S. Miller 666645ca708SEric Dumazet spin_unlock(&hslot->lock); 667a1ab77f9SEric Dumazet 668a1ab77f9SEric Dumazet if (count) { 669a1ab77f9SEric Dumazet flush_stack(stack, count, skb, count - 1); 670a1ab77f9SEric Dumazet 671a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 672a1ab77f9SEric Dumazet sock_put(stack[i]); 673a1ab77f9SEric Dumazet } else { 674a1ab77f9SEric Dumazet kfree_skb(skb); 675a1ab77f9SEric Dumazet } 676db8dac20SDavid S. Miller return 0; 677db8dac20SDavid S. Miller } 678db8dac20SDavid S. Miller 679db8dac20SDavid S. Miller static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, 680db8dac20SDavid S. Miller int proto) 681db8dac20SDavid S. Miller { 682db8dac20SDavid S. Miller int err; 683db8dac20SDavid S. Miller 684db8dac20SDavid S. Miller UDP_SKB_CB(skb)->partial_cov = 0; 685db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov = skb->len; 686db8dac20SDavid S. Miller 687db8dac20SDavid S. Miller if (proto == IPPROTO_UDPLITE) { 688db8dac20SDavid S. Miller err = udplite_checksum_init(skb, uh); 689db8dac20SDavid S. Miller if (err) 690db8dac20SDavid S. Miller return err; 691db8dac20SDavid S. Miller } 692db8dac20SDavid S. Miller 693db8dac20SDavid S. Miller if (uh->check == 0) { 694db8dac20SDavid S. Miller /* RFC 2460 section 8.1 says that we SHOULD log 695db8dac20SDavid S. Miller this error. Well, it is reasonable. 696db8dac20SDavid S. Miller */ 697db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); 698db8dac20SDavid S. Miller return 1; 699db8dac20SDavid S. Miller } 700db8dac20SDavid S. Miller if (skb->ip_summed == CHECKSUM_COMPLETE && 701db8dac20SDavid S. Miller !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, 702db8dac20SDavid S. Miller skb->len, proto, skb->csum)) 703db8dac20SDavid S. Miller skb->ip_summed = CHECKSUM_UNNECESSARY; 704db8dac20SDavid S. Miller 705db8dac20SDavid S. Miller if (!skb_csum_unnecessary(skb)) 706db8dac20SDavid S. Miller skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 707db8dac20SDavid S. Miller &ipv6_hdr(skb)->daddr, 708db8dac20SDavid S. Miller skb->len, proto, 0)); 709db8dac20SDavid S. Miller 710db8dac20SDavid S. Miller return 0; 711db8dac20SDavid S. Miller } 712db8dac20SDavid S. Miller 713645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 714db8dac20SDavid S. Miller int proto) 715db8dac20SDavid S. Miller { 7163ffe533cSAlexey Dobriyan struct net *net = dev_net(skb->dev); 717db8dac20SDavid S. Miller struct sock *sk; 718db8dac20SDavid S. Miller struct udphdr *uh; 719b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 720db8dac20SDavid S. Miller u32 ulen = 0; 721db8dac20SDavid S. Miller 722db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 723d6bc0149SBjørn Mork goto discard; 724db8dac20SDavid S. Miller 725db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 726db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 727db8dac20SDavid S. Miller uh = udp_hdr(skb); 728db8dac20SDavid S. Miller 729db8dac20SDavid S. Miller ulen = ntohs(uh->len); 730db8dac20SDavid S. Miller if (ulen > skb->len) 731db8dac20SDavid S. Miller goto short_packet; 732db8dac20SDavid S. Miller 733db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 734db8dac20SDavid S. Miller /* UDP validates ulen. */ 735db8dac20SDavid S. Miller 736db8dac20SDavid S. Miller /* Check for jumbo payload */ 737db8dac20SDavid S. Miller if (ulen == 0) 738db8dac20SDavid S. Miller ulen = skb->len; 739db8dac20SDavid S. Miller 740db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 741db8dac20SDavid S. Miller goto short_packet; 742db8dac20SDavid S. Miller 743db8dac20SDavid S. Miller if (ulen < skb->len) { 744db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 745db8dac20SDavid S. Miller goto short_packet; 746db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 747db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 748db8dac20SDavid S. Miller uh = udp_hdr(skb); 749db8dac20SDavid S. Miller } 750db8dac20SDavid S. Miller } 751db8dac20SDavid S. Miller 752db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 753db8dac20SDavid S. Miller goto discard; 754db8dac20SDavid S. Miller 755db8dac20SDavid S. Miller /* 756db8dac20SDavid S. Miller * Multicast receive code 757db8dac20SDavid S. Miller */ 758db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 759e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 760e3163493SPavel Emelyanov saddr, daddr, udptable); 761db8dac20SDavid S. Miller 762db8dac20SDavid S. Miller /* Unicast */ 763db8dac20SDavid S. Miller 764db8dac20SDavid S. Miller /* 765db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 766db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 767db8dac20SDavid S. Miller */ 768607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 769db8dac20SDavid S. Miller 770db8dac20SDavid S. Miller if (sk == NULL) { 771db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 772db8dac20SDavid S. Miller goto discard; 773db8dac20SDavid S. Miller 774db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 775db8dac20SDavid S. Miller goto discard; 776ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, 777ef28d1a2SPavel Emelyanov proto == IPPROTO_UDPLITE); 778db8dac20SDavid S. Miller 7793ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 780db8dac20SDavid S. Miller 781db8dac20SDavid S. Miller kfree_skb(skb); 782db8dac20SDavid S. Miller return 0; 783db8dac20SDavid S. Miller } 784db8dac20SDavid S. Miller 785db8dac20SDavid S. Miller /* deliver */ 786db8dac20SDavid S. Miller 787c377411fSEric Dumazet if (sk_rcvqueues_full(sk, skb)) { 788c377411fSEric Dumazet sock_put(sk); 789c377411fSEric Dumazet goto discard; 790c377411fSEric Dumazet } 791d97106eaSHerbert Xu bh_lock_sock(sk); 792db8dac20SDavid S. Miller if (!sock_owned_by_user(sk)) 793db8dac20SDavid S. Miller udpv6_queue_rcv_skb(sk, skb); 794a3a858ffSZhu Yi else if (sk_add_backlog(sk, skb)) { 79555349790SZhu Yi atomic_inc(&sk->sk_drops); 79655349790SZhu Yi bh_unlock_sock(sk); 79755349790SZhu Yi sock_put(sk); 79855349790SZhu Yi goto discard; 79955349790SZhu Yi } 800db8dac20SDavid S. Miller bh_unlock_sock(sk); 801db8dac20SDavid S. Miller sock_put(sk); 802db8dac20SDavid S. Miller return 0; 803db8dac20SDavid S. Miller 804db8dac20SDavid S. Miller short_packet: 805d6bc0149SBjørn Mork LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 806db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 807d6bc0149SBjørn Mork saddr, 808d6bc0149SBjørn Mork ntohs(uh->source), 809d6bc0149SBjørn Mork ulen, 810d6bc0149SBjørn Mork skb->len, 811d6bc0149SBjørn Mork daddr, 812d6bc0149SBjørn Mork ntohs(uh->dest)); 813db8dac20SDavid S. Miller 814db8dac20SDavid S. Miller discard: 815ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 816db8dac20SDavid S. Miller kfree_skb(skb); 817db8dac20SDavid S. Miller return 0; 818db8dac20SDavid S. Miller } 819db8dac20SDavid S. Miller 820db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 821db8dac20SDavid S. Miller { 822645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 823db8dac20SDavid S. Miller } 824db8dac20SDavid S. Miller 825db8dac20SDavid S. Miller /* 826db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 827db8dac20SDavid S. Miller */ 828db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 829db8dac20SDavid S. Miller { 830db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 831db8dac20SDavid S. Miller 83236d926b9SDenis V. Lunev if (up->pending == AF_INET) 83336d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 83436d926b9SDenis V. Lunev else if (up->pending) { 835db8dac20SDavid S. Miller up->len = 0; 836db8dac20SDavid S. Miller up->pending = 0; 837db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 838db8dac20SDavid S. Miller } 839db8dac20SDavid S. Miller } 840db8dac20SDavid S. Miller 841493c6be3SSridhar Samudrala /** 842493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 843493c6be3SSridhar Samudrala * @sk: socket we are sending on 844493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 845493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 846493c6be3SSridhar Samudrala */ 847493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 848493c6be3SSridhar Samudrala const struct in6_addr *saddr, 849493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 850493c6be3SSridhar Samudrala { 851493c6be3SSridhar Samudrala unsigned int offset; 852493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 853493c6be3SSridhar Samudrala __wsum csum = 0; 854493c6be3SSridhar Samudrala 855493c6be3SSridhar Samudrala if (skb_queue_len(&sk->sk_write_queue) == 1) { 856493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 857493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 858493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 859493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 860493c6be3SSridhar Samudrala } else { 861493c6be3SSridhar Samudrala /* 862493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 863493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 864493c6be3SSridhar Samudrala * should be together 865493c6be3SSridhar Samudrala */ 866493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 867493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 868493c6be3SSridhar Samudrala 869493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 870493c6be3SSridhar Samudrala 871493c6be3SSridhar Samudrala skb_queue_walk(&sk->sk_write_queue, skb) { 872493c6be3SSridhar Samudrala csum = csum_add(csum, skb->csum); 873493c6be3SSridhar Samudrala } 874493c6be3SSridhar Samudrala 875493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 876493c6be3SSridhar Samudrala csum); 877493c6be3SSridhar Samudrala if (uh->check == 0) 878493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 879493c6be3SSridhar Samudrala } 880493c6be3SSridhar Samudrala } 881493c6be3SSridhar Samudrala 882db8dac20SDavid S. Miller /* 883db8dac20SDavid S. Miller * Sending 884db8dac20SDavid S. Miller */ 885db8dac20SDavid S. Miller 886db8dac20SDavid S. Miller static int udp_v6_push_pending_frames(struct sock *sk) 887db8dac20SDavid S. Miller { 888db8dac20SDavid S. Miller struct sk_buff *skb; 889db8dac20SDavid S. Miller struct udphdr *uh; 890db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 891db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 8924c9483b2SDavid S. Miller struct flowi6 *fl6 = &inet->cork.fl.u.ip6; 893db8dac20SDavid S. Miller int err = 0; 894db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 895db8dac20SDavid S. Miller __wsum csum = 0; 896db8dac20SDavid S. Miller 897db8dac20SDavid S. Miller /* Grab the skbuff where UDP header space exists. */ 898db8dac20SDavid S. Miller if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 899db8dac20SDavid S. Miller goto out; 900db8dac20SDavid S. Miller 901db8dac20SDavid S. Miller /* 902db8dac20SDavid S. Miller * Create a UDP header 903db8dac20SDavid S. Miller */ 904db8dac20SDavid S. Miller uh = udp_hdr(skb); 9051958b856SDavid S. Miller uh->source = fl6->fl6_sport; 9061958b856SDavid S. Miller uh->dest = fl6->fl6_dport; 907db8dac20SDavid S. Miller uh->len = htons(up->len); 908db8dac20SDavid S. Miller uh->check = 0; 909db8dac20SDavid S. Miller 910db8dac20SDavid S. Miller if (is_udplite) 911db8dac20SDavid S. Miller csum = udplite_csum_outgoing(sk, skb); 912493c6be3SSridhar Samudrala else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 9134c9483b2SDavid S. Miller udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, 914493c6be3SSridhar Samudrala up->len); 915493c6be3SSridhar Samudrala goto send; 916493c6be3SSridhar Samudrala } else 917db8dac20SDavid S. Miller csum = udp_csum_outgoing(sk, skb); 918db8dac20SDavid S. Miller 919db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 9204c9483b2SDavid S. Miller uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 9214c9483b2SDavid S. Miller up->len, fl6->flowi6_proto, csum); 922db8dac20SDavid S. Miller if (uh->check == 0) 923db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 924db8dac20SDavid S. Miller 925493c6be3SSridhar Samudrala send: 926db8dac20SDavid S. Miller err = ip6_push_pending_frames(sk); 9276ce9e7b5SEric Dumazet if (err) { 9286ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 9296ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9306ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 9316ce9e7b5SEric Dumazet err = 0; 9326ce9e7b5SEric Dumazet } 9336ce9e7b5SEric Dumazet } else 9346ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9356ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 936db8dac20SDavid S. Miller out: 937db8dac20SDavid S. Miller up->len = 0; 938db8dac20SDavid S. Miller up->pending = 0; 939db8dac20SDavid S. Miller return err; 940db8dac20SDavid S. Miller } 941db8dac20SDavid S. Miller 942db8dac20SDavid S. Miller int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, 943db8dac20SDavid S. Miller struct msghdr *msg, size_t len) 944db8dac20SDavid S. Miller { 945db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 946db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 947db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 948db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 949db8dac20SDavid S. Miller struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; 95020c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 951db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 952db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 9534c9483b2SDavid S. Miller struct flowi6 fl6; 954db8dac20SDavid S. Miller struct dst_entry *dst; 955db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 956db8dac20SDavid S. Miller int ulen = len; 957db8dac20SDavid S. Miller int hlimit = -1; 958db8dac20SDavid S. Miller int tclass = -1; 95913b52cd4SBrian Haley int dontfrag = -1; 960db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 961db8dac20SDavid S. Miller int err; 962db8dac20SDavid S. Miller int connected = 0; 963db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 964db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 965db8dac20SDavid S. Miller 966db8dac20SDavid S. Miller /* destination address check */ 967db8dac20SDavid S. Miller if (sin6) { 968db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 969db8dac20SDavid S. Miller return -EINVAL; 970db8dac20SDavid S. Miller 971db8dac20SDavid S. Miller switch (sin6->sin6_family) { 972db8dac20SDavid S. Miller case AF_INET6: 973db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 974db8dac20SDavid S. Miller return -EINVAL; 975db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 976db8dac20SDavid S. Miller break; 977db8dac20SDavid S. Miller case AF_INET: 978db8dac20SDavid S. Miller goto do_udp_sendmsg; 979db8dac20SDavid S. Miller case AF_UNSPEC: 980db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 981db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 982db8dac20SDavid S. Miller daddr = NULL; 983db8dac20SDavid S. Miller break; 984db8dac20SDavid S. Miller default: 985db8dac20SDavid S. Miller return -EINVAL; 986db8dac20SDavid S. Miller } 987db8dac20SDavid S. Miller } else if (!up->pending) { 988db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 989db8dac20SDavid S. Miller return -EDESTADDRREQ; 990db8dac20SDavid S. Miller daddr = &np->daddr; 991db8dac20SDavid S. Miller } else 992db8dac20SDavid S. Miller daddr = NULL; 993db8dac20SDavid S. Miller 994db8dac20SDavid S. Miller if (daddr) { 995db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 996db8dac20SDavid S. Miller struct sockaddr_in sin; 997db8dac20SDavid S. Miller sin.sin_family = AF_INET; 998c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 999db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1000db8dac20SDavid S. Miller msg->msg_name = &sin; 1001db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 1002db8dac20SDavid S. Miller do_udp_sendmsg: 1003db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 1004db8dac20SDavid S. Miller return -ENETUNREACH; 1005db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1006db8dac20SDavid S. Miller } 1007db8dac20SDavid S. Miller } 1008db8dac20SDavid S. Miller 1009db8dac20SDavid S. Miller if (up->pending == AF_INET) 1010db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1011db8dac20SDavid S. Miller 1012db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1013db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1014db8dac20SDavid S. Miller */ 1015db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1016db8dac20SDavid S. Miller return -EMSGSIZE; 1017db8dac20SDavid S. Miller 1018db8dac20SDavid S. Miller if (up->pending) { 1019db8dac20SDavid S. Miller /* 1020db8dac20SDavid S. Miller * There are pending frames. 1021db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1022db8dac20SDavid S. Miller */ 1023db8dac20SDavid S. Miller lock_sock(sk); 1024db8dac20SDavid S. Miller if (likely(up->pending)) { 1025db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1026db8dac20SDavid S. Miller release_sock(sk); 1027db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1028db8dac20SDavid S. Miller } 1029db8dac20SDavid S. Miller dst = NULL; 1030db8dac20SDavid S. Miller goto do_append_data; 1031db8dac20SDavid S. Miller } 1032db8dac20SDavid S. Miller release_sock(sk); 1033db8dac20SDavid S. Miller } 1034db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1035db8dac20SDavid S. Miller 10364c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 1037db8dac20SDavid S. Miller 1038db8dac20SDavid S. Miller if (sin6) { 1039db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1040db8dac20SDavid S. Miller return -EINVAL; 1041db8dac20SDavid S. Miller 10421958b856SDavid S. Miller fl6.fl6_dport = sin6->sin6_port; 1043db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1044db8dac20SDavid S. Miller 1045db8dac20SDavid S. Miller if (np->sndflow) { 10464c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 10474c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 10484c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1049db8dac20SDavid S. Miller if (flowlabel == NULL) 1050db8dac20SDavid S. Miller return -EINVAL; 1051db8dac20SDavid S. Miller daddr = &flowlabel->dst; 1052db8dac20SDavid S. Miller } 1053db8dac20SDavid S. Miller } 1054db8dac20SDavid S. Miller 1055db8dac20SDavid S. Miller /* 1056db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1057db8dac20SDavid S. Miller * sk->sk_dst_cache. 1058db8dac20SDavid S. Miller */ 1059db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1060db8dac20SDavid S. Miller ipv6_addr_equal(daddr, &np->daddr)) 1061db8dac20SDavid S. Miller daddr = &np->daddr; 1062db8dac20SDavid S. Miller 1063db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1064db8dac20SDavid S. Miller sin6->sin6_scope_id && 1065db8dac20SDavid S. Miller ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) 10664c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 1067db8dac20SDavid S. Miller } else { 1068db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1069db8dac20SDavid S. Miller return -EDESTADDRREQ; 1070db8dac20SDavid S. Miller 10711958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 1072db8dac20SDavid S. Miller daddr = &np->daddr; 10734c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 1074db8dac20SDavid S. Miller connected = 1; 1075db8dac20SDavid S. Miller } 1076db8dac20SDavid S. Miller 10774c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 10784c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 1079db8dac20SDavid S. Miller 10804c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 10814c9483b2SDavid S. Miller fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 10829f690db7SYang Hongyang 10834c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 108451953d5bSBrian Haley 1085db8dac20SDavid S. Miller if (msg->msg_controllen) { 1086db8dac20SDavid S. Miller opt = &opt_space; 1087db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1088db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 1089db8dac20SDavid S. Miller 10904c9483b2SDavid S. Miller err = datagram_send_ctl(sock_net(sk), msg, &fl6, opt, &hlimit, 109113b52cd4SBrian Haley &tclass, &dontfrag); 1092db8dac20SDavid S. Miller if (err < 0) { 1093db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1094db8dac20SDavid S. Miller return err; 1095db8dac20SDavid S. Miller } 10964c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 10974c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1098db8dac20SDavid S. Miller if (flowlabel == NULL) 1099db8dac20SDavid S. Miller return -EINVAL; 1100db8dac20SDavid S. Miller } 1101db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1102db8dac20SDavid S. Miller opt = NULL; 1103db8dac20SDavid S. Miller connected = 0; 1104db8dac20SDavid S. Miller } 1105db8dac20SDavid S. Miller if (opt == NULL) 1106db8dac20SDavid S. Miller opt = np->opt; 1107db8dac20SDavid S. Miller if (flowlabel) 1108db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1109db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 1110db8dac20SDavid S. Miller 11114c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 1112876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 11134c9483b2SDavid S. Miller ipv6_addr_copy(&fl6.daddr, daddr); 1114876c7f41SBrian Haley else 11154c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 11164c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 11174c9483b2SDavid S. Miller ipv6_addr_copy(&fl6.saddr, &np->saddr); 11181958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 1119db8dac20SDavid S. Miller 11204c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 112120c59de2SArnaud Ebalard if (final_p) 1122db8dac20SDavid S. Miller connected = 0; 1123db8dac20SDavid S. Miller 11244c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { 11254c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 1126db8dac20SDavid S. Miller connected = 0; 1127db8dac20SDavid S. Miller } 1128db8dac20SDavid S. Miller 11294c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 1130db8dac20SDavid S. Miller 11314c9483b2SDavid S. Miller dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); 113268d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 113368d0c6d3SDavid S. Miller err = PTR_ERR(dst); 113468d0c6d3SDavid S. Miller dst = NULL; 1135db8dac20SDavid S. Miller goto out; 1136db8dac20SDavid S. Miller } 1137db8dac20SDavid S. Miller 1138db8dac20SDavid S. Miller if (hlimit < 0) { 11394c9483b2SDavid S. Miller if (ipv6_addr_is_multicast(&fl6.daddr)) 1140db8dac20SDavid S. Miller hlimit = np->mcast_hops; 1141db8dac20SDavid S. Miller else 1142db8dac20SDavid S. Miller hlimit = np->hop_limit; 1143db8dac20SDavid S. Miller if (hlimit < 0) 11446b75d090SYOSHIFUJI Hideaki hlimit = ip6_dst_hoplimit(dst); 1145db8dac20SDavid S. Miller } 1146db8dac20SDavid S. Miller 1147db8dac20SDavid S. Miller if (tclass < 0) 1148e651f03aSGerrit Renker tclass = np->tclass; 1149db8dac20SDavid S. Miller 115013b52cd4SBrian Haley if (dontfrag < 0) 115113b52cd4SBrian Haley dontfrag = np->dontfrag; 115213b52cd4SBrian Haley 1153db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1154db8dac20SDavid S. Miller goto do_confirm; 1155db8dac20SDavid S. Miller back_from_confirm: 1156db8dac20SDavid S. Miller 1157db8dac20SDavid S. Miller lock_sock(sk); 1158db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1159db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1160db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1161db8dac20SDavid S. Miller release_sock(sk); 1162db8dac20SDavid S. Miller 1163db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); 1164db8dac20SDavid S. Miller err = -EINVAL; 1165db8dac20SDavid S. Miller goto out; 1166db8dac20SDavid S. Miller } 1167db8dac20SDavid S. Miller 1168db8dac20SDavid S. Miller up->pending = AF_INET6; 1169db8dac20SDavid S. Miller 1170db8dac20SDavid S. Miller do_append_data: 1171db8dac20SDavid S. Miller up->len += ulen; 1172db8dac20SDavid S. Miller getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1173db8dac20SDavid S. Miller err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, 11744c9483b2SDavid S. Miller sizeof(struct udphdr), hlimit, tclass, opt, &fl6, 1175db8dac20SDavid S. Miller (struct rt6_info*)dst, 117613b52cd4SBrian Haley corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); 1177db8dac20SDavid S. Miller if (err) 1178db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1179db8dac20SDavid S. Miller else if (!corkreq) 1180db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1181db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1182db8dac20SDavid S. Miller up->pending = 0; 1183db8dac20SDavid S. Miller 1184db8dac20SDavid S. Miller if (dst) { 1185db8dac20SDavid S. Miller if (connected) { 1186db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 11874c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.daddr, &np->daddr) ? 1188db8dac20SDavid S. Miller &np->daddr : NULL, 1189db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 11904c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1191db8dac20SDavid S. Miller &np->saddr : 1192db8dac20SDavid S. Miller #endif 1193db8dac20SDavid S. Miller NULL); 1194db8dac20SDavid S. Miller } else { 1195db8dac20SDavid S. Miller dst_release(dst); 1196db8dac20SDavid S. Miller } 1197a3c96089SYOSHIFUJI Hideaki dst = NULL; 1198db8dac20SDavid S. Miller } 1199db8dac20SDavid S. Miller 1200db8dac20SDavid S. Miller if (err > 0) 1201db8dac20SDavid S. Miller err = np->recverr ? net_xmit_errno(err) : 0; 1202db8dac20SDavid S. Miller release_sock(sk); 1203db8dac20SDavid S. Miller out: 1204a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1205db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1206db8dac20SDavid S. Miller if (!err) 1207db8dac20SDavid S. Miller return len; 1208db8dac20SDavid S. Miller /* 1209db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1210db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1211db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1212db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1213db8dac20SDavid S. Miller * seems like overkill. 1214db8dac20SDavid S. Miller */ 1215db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 1216235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 1217235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1218db8dac20SDavid S. Miller } 1219db8dac20SDavid S. Miller return err; 1220db8dac20SDavid S. Miller 1221db8dac20SDavid S. Miller do_confirm: 1222db8dac20SDavid S. Miller dst_confirm(dst); 1223db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1224db8dac20SDavid S. Miller goto back_from_confirm; 1225db8dac20SDavid S. Miller err = 0; 1226db8dac20SDavid S. Miller goto out; 1227db8dac20SDavid S. Miller } 1228db8dac20SDavid S. Miller 12297d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1230db8dac20SDavid S. Miller { 1231db8dac20SDavid S. Miller lock_sock(sk); 1232db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1233db8dac20SDavid S. Miller release_sock(sk); 1234db8dac20SDavid S. Miller 1235db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1236db8dac20SDavid S. Miller } 1237db8dac20SDavid S. Miller 1238db8dac20SDavid S. Miller /* 1239db8dac20SDavid S. Miller * Socket option code for UDP 1240db8dac20SDavid S. Miller */ 1241db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1242b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1243db8dac20SDavid S. Miller { 1244db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1245db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1246db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1247db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1248db8dac20SDavid S. Miller } 1249db8dac20SDavid S. Miller 1250db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1251db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1252b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1253db8dac20SDavid S. Miller { 1254db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1255db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1256db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1257db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1258db8dac20SDavid S. Miller } 1259db8dac20SDavid S. Miller #endif 1260db8dac20SDavid S. Miller 1261db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1262db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1263db8dac20SDavid S. Miller { 1264db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1265db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1266db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1267db8dac20SDavid S. Miller } 1268db8dac20SDavid S. Miller 1269db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1270db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1271db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1272db8dac20SDavid S. Miller { 1273db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1274db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1275db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1276db8dac20SDavid S. Miller } 1277db8dac20SDavid S. Miller #endif 1278db8dac20SDavid S. Miller 1279ba735425SSridhar Samudrala static int udp6_ufo_send_check(struct sk_buff *skb) 1280ba735425SSridhar Samudrala { 1281b71d1d42SEric Dumazet const struct ipv6hdr *ipv6h; 1282ba735425SSridhar Samudrala struct udphdr *uh; 1283ba735425SSridhar Samudrala 1284ba735425SSridhar Samudrala if (!pskb_may_pull(skb, sizeof(*uh))) 1285ba735425SSridhar Samudrala return -EINVAL; 1286ba735425SSridhar Samudrala 1287ba735425SSridhar Samudrala ipv6h = ipv6_hdr(skb); 1288ba735425SSridhar Samudrala uh = udp_hdr(skb); 1289ba735425SSridhar Samudrala 1290ba735425SSridhar Samudrala uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, 1291ba735425SSridhar Samudrala IPPROTO_UDP, 0); 1292ba735425SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 1293ba735425SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 1294ba735425SSridhar Samudrala skb->ip_summed = CHECKSUM_PARTIAL; 1295ba735425SSridhar Samudrala return 0; 1296ba735425SSridhar Samudrala } 1297ba735425SSridhar Samudrala 129804ed3e74SMichał Mirosław static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, u32 features) 1299ba735425SSridhar Samudrala { 1300ba735425SSridhar Samudrala struct sk_buff *segs = ERR_PTR(-EINVAL); 1301ba735425SSridhar Samudrala unsigned int mss; 1302ba735425SSridhar Samudrala unsigned int unfrag_ip6hlen, unfrag_len; 1303ba735425SSridhar Samudrala struct frag_hdr *fptr; 1304ba735425SSridhar Samudrala u8 *mac_start, *prevhdr; 1305ba735425SSridhar Samudrala u8 nexthdr; 1306ba735425SSridhar Samudrala u8 frag_hdr_sz = sizeof(struct frag_hdr); 1307ba735425SSridhar Samudrala int offset; 1308ba735425SSridhar Samudrala __wsum csum; 1309ba735425SSridhar Samudrala 1310ba735425SSridhar Samudrala mss = skb_shinfo(skb)->gso_size; 1311ba735425SSridhar Samudrala if (unlikely(skb->len <= mss)) 1312ba735425SSridhar Samudrala goto out; 1313ba735425SSridhar Samudrala 1314ba735425SSridhar Samudrala if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { 1315ba735425SSridhar Samudrala /* Packet is from an untrusted source, reset gso_segs. */ 1316ba735425SSridhar Samudrala int type = skb_shinfo(skb)->gso_type; 1317ba735425SSridhar Samudrala 1318ba735425SSridhar Samudrala if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || 1319ba735425SSridhar Samudrala !(type & (SKB_GSO_UDP)))) 1320ba735425SSridhar Samudrala goto out; 1321ba735425SSridhar Samudrala 1322ba735425SSridhar Samudrala skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); 1323ba735425SSridhar Samudrala 1324ba735425SSridhar Samudrala segs = NULL; 1325ba735425SSridhar Samudrala goto out; 1326ba735425SSridhar Samudrala } 1327ba735425SSridhar Samudrala 1328ba735425SSridhar Samudrala /* Do software UFO. Complete and fill in the UDP checksum as HW cannot 1329ba735425SSridhar Samudrala * do checksum of UDP packets sent as multiple IP fragments. 1330ba735425SSridhar Samudrala */ 133196339d6cSShan Wei offset = skb_checksum_start_offset(skb); 1332ba735425SSridhar Samudrala csum = skb_checksum(skb, offset, skb->len- offset, 0); 1333ba735425SSridhar Samudrala offset += skb->csum_offset; 1334ba735425SSridhar Samudrala *(__sum16 *)(skb->data + offset) = csum_fold(csum); 1335ba735425SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 1336ba735425SSridhar Samudrala 1337ba735425SSridhar Samudrala /* Check if there is enough headroom to insert fragment header. */ 1338a9cf73eaSShan Wei if ((skb_mac_header(skb) < skb->head + frag_hdr_sz) && 1339ba735425SSridhar Samudrala pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) 1340ba735425SSridhar Samudrala goto out; 1341ba735425SSridhar Samudrala 1342ba735425SSridhar Samudrala /* Find the unfragmentable header and shift it left by frag_hdr_sz 1343ba735425SSridhar Samudrala * bytes to insert fragment header. 1344ba735425SSridhar Samudrala */ 1345ba735425SSridhar Samudrala unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); 1346ba735425SSridhar Samudrala nexthdr = *prevhdr; 1347ba735425SSridhar Samudrala *prevhdr = NEXTHDR_FRAGMENT; 1348ba735425SSridhar Samudrala unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + 1349ba735425SSridhar Samudrala unfrag_ip6hlen; 1350ba735425SSridhar Samudrala mac_start = skb_mac_header(skb); 1351ba735425SSridhar Samudrala memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); 1352ba735425SSridhar Samudrala 1353ba735425SSridhar Samudrala skb->mac_header -= frag_hdr_sz; 1354ba735425SSridhar Samudrala skb->network_header -= frag_hdr_sz; 1355ba735425SSridhar Samudrala 1356ba735425SSridhar Samudrala fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); 1357ba735425SSridhar Samudrala fptr->nexthdr = nexthdr; 1358ba735425SSridhar Samudrala fptr->reserved = 0; 1359ba735425SSridhar Samudrala ipv6_select_ident(fptr); 1360ba735425SSridhar Samudrala 1361ba735425SSridhar Samudrala /* Fragment the skb. ipv6 header and the remaining fields of the 1362ba735425SSridhar Samudrala * fragment header are updated in ipv6_gso_segment() 1363ba735425SSridhar Samudrala */ 1364ba735425SSridhar Samudrala segs = skb_segment(skb, features); 1365ba735425SSridhar Samudrala 1366ba735425SSridhar Samudrala out: 1367ba735425SSridhar Samudrala return segs; 1368ba735425SSridhar Samudrala } 1369ba735425SSridhar Samudrala 137041135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1371db8dac20SDavid S. Miller .handler = udpv6_rcv, 1372db8dac20SDavid S. Miller .err_handler = udpv6_err, 1373ba735425SSridhar Samudrala .gso_send_check = udp6_ufo_send_check, 1374ba735425SSridhar Samudrala .gso_segment = udp6_ufo_fragment, 1375db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1376db8dac20SDavid S. Miller }; 1377db8dac20SDavid S. Miller 1378db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1379db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1380db8dac20SDavid S. Miller 1381db8dac20SDavid S. Miller static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) 1382db8dac20SDavid S. Miller { 1383db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sp); 1384db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sp); 1385b71d1d42SEric Dumazet const struct in6_addr *dest, *src; 1386db8dac20SDavid S. Miller __u16 destp, srcp; 1387db8dac20SDavid S. Miller 1388db8dac20SDavid S. Miller dest = &np->daddr; 1389db8dac20SDavid S. Miller src = &np->rcv_saddr; 1390c720c7e8SEric Dumazet destp = ntohs(inet->inet_dport); 1391c720c7e8SEric Dumazet srcp = ntohs(inet->inet_sport); 1392db8dac20SDavid S. Miller seq_printf(seq, 1393f86dcc5aSEric Dumazet "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 1394cb61cb9bSEric Dumazet "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", 1395db8dac20SDavid S. Miller bucket, 1396db8dac20SDavid S. Miller src->s6_addr32[0], src->s6_addr32[1], 1397db8dac20SDavid S. Miller src->s6_addr32[2], src->s6_addr32[3], srcp, 1398db8dac20SDavid S. Miller dest->s6_addr32[0], dest->s6_addr32[1], 1399db8dac20SDavid S. Miller dest->s6_addr32[2], dest->s6_addr32[3], destp, 1400db8dac20SDavid S. Miller sp->sk_state, 140131e6d363SEric Dumazet sk_wmem_alloc_get(sp), 140231e6d363SEric Dumazet sk_rmem_alloc_get(sp), 1403db8dac20SDavid S. Miller 0, 0L, 0, 1404db8dac20SDavid S. Miller sock_i_uid(sp), 0, 1405db8dac20SDavid S. Miller sock_i_ino(sp), 1406cb61cb9bSEric Dumazet atomic_read(&sp->sk_refcnt), sp, 1407cb61cb9bSEric Dumazet atomic_read(&sp->sk_drops)); 1408db8dac20SDavid S. Miller } 1409db8dac20SDavid S. Miller 1410db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1411db8dac20SDavid S. Miller { 1412db8dac20SDavid S. Miller if (v == SEQ_START_TOKEN) 1413db8dac20SDavid S. Miller seq_printf(seq, 1414db8dac20SDavid S. Miller " sl " 1415db8dac20SDavid S. Miller "local_address " 1416db8dac20SDavid S. Miller "remote_address " 1417db8dac20SDavid S. Miller "st tx_queue rx_queue tr tm->when retrnsmt" 1418cb61cb9bSEric Dumazet " uid timeout inode ref pointer drops\n"); 1419db8dac20SDavid S. Miller else 1420db8dac20SDavid S. Miller udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); 1421db8dac20SDavid S. Miller return 0; 1422db8dac20SDavid S. Miller } 1423db8dac20SDavid S. Miller 1424db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1425db8dac20SDavid S. Miller .name = "udp6", 1426db8dac20SDavid S. Miller .family = AF_INET6, 1427645ca708SEric Dumazet .udp_table = &udp_table, 14284ad96d39SDenis V. Lunev .seq_fops = { 14294ad96d39SDenis V. Lunev .owner = THIS_MODULE, 14304ad96d39SDenis V. Lunev }, 1431dda61925SDenis V. Lunev .seq_ops = { 1432dda61925SDenis V. Lunev .show = udp6_seq_show, 1433dda61925SDenis V. Lunev }, 1434db8dac20SDavid S. Miller }; 1435db8dac20SDavid S. Miller 14362c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1437db8dac20SDavid S. Miller { 14380c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1439db8dac20SDavid S. Miller } 1440db8dac20SDavid S. Miller 14410c96d8c5SDaniel Lezcano void udp6_proc_exit(struct net *net) { 14420c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1443db8dac20SDavid S. Miller } 1444db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1445db8dac20SDavid S. Miller 1446db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1447db8dac20SDavid S. Miller 1448db8dac20SDavid S. Miller struct proto udpv6_prot = { 1449db8dac20SDavid S. Miller .name = "UDPv6", 1450db8dac20SDavid S. Miller .owner = THIS_MODULE, 1451db8dac20SDavid S. Miller .close = udp_lib_close, 1452db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1453db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1454db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1455db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1456db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1457db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1458db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1459db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1460db8dac20SDavid S. Miller .backlog_rcv = udpv6_queue_rcv_skb, 1461db8dac20SDavid S. Miller .hash = udp_lib_hash, 1462db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1463719f8358SEric Dumazet .rehash = udp_v6_rehash, 1464db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1465db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1466db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1467db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1468db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1469db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1470271b72c7SEric Dumazet .slab_flags = SLAB_DESTROY_BY_RCU, 1471645ca708SEric Dumazet .h.udp_table = &udp_table, 1472db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1473db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1474db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1475db8dac20SDavid S. Miller #endif 1476fcbdf09dSOctavian Purdila .clear_sk = sk_prot_clear_portaddr_nulls, 1477db8dac20SDavid S. Miller }; 1478db8dac20SDavid S. Miller 1479db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1480db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1481db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1482db8dac20SDavid S. Miller .prot = &udpv6_prot, 1483db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1484db8dac20SDavid S. Miller .no_check = UDP_CSUM_DEFAULT, 1485db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1486db8dac20SDavid S. Miller }; 1487db8dac20SDavid S. Miller 1488db8dac20SDavid S. Miller 1489db8dac20SDavid S. Miller int __init udpv6_init(void) 1490db8dac20SDavid S. Miller { 1491db8dac20SDavid S. Miller int ret; 1492db8dac20SDavid S. Miller 1493db8dac20SDavid S. Miller ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 1494db8dac20SDavid S. Miller if (ret) 1495db8dac20SDavid S. Miller goto out; 1496db8dac20SDavid S. Miller 1497db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1498db8dac20SDavid S. Miller if (ret) 1499db8dac20SDavid S. Miller goto out_udpv6_protocol; 1500db8dac20SDavid S. Miller out: 1501db8dac20SDavid S. Miller return ret; 1502db8dac20SDavid S. Miller 1503db8dac20SDavid S. Miller out_udpv6_protocol: 1504db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1505db8dac20SDavid S. Miller goto out; 1506db8dac20SDavid S. Miller } 1507db8dac20SDavid S. Miller 1508db8dac20SDavid S. Miller void udpv6_exit(void) 1509db8dac20SDavid S. Miller { 1510db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1511db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1512db8dac20SDavid S. Miller } 1513