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 45632c90254SXufeng Zhang if (noblock) 457db8dac20SDavid S. Miller return -EAGAIN; 4589cfaa8deSXufeng Zhang 4599cfaa8deSXufeng Zhang /* starting over for a new packet */ 4609cfaa8deSXufeng Zhang msg->msg_flags &= ~MSG_TRUNC; 461db8dac20SDavid S. Miller goto try_again; 462db8dac20SDavid S. Miller } 463db8dac20SDavid S. Miller 464db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 465d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 466645ca708SEric Dumazet struct udp_table *udptable) 467db8dac20SDavid S. Miller { 468db8dac20SDavid S. Miller struct ipv6_pinfo *np; 469b71d1d42SEric Dumazet const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; 470b71d1d42SEric Dumazet const struct in6_addr *saddr = &hdr->saddr; 471b71d1d42SEric Dumazet const struct in6_addr *daddr = &hdr->daddr; 472db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr*)(skb->data+offset); 473db8dac20SDavid S. Miller struct sock *sk; 474db8dac20SDavid S. Miller int err; 475db8dac20SDavid S. Miller 476c346dca1SYOSHIFUJI Hideaki sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, 477db8dac20SDavid S. Miller saddr, uh->source, inet6_iif(skb), udptable); 478db8dac20SDavid S. Miller if (sk == NULL) 479db8dac20SDavid S. Miller return; 480db8dac20SDavid S. Miller 481db8dac20SDavid S. Miller np = inet6_sk(sk); 482db8dac20SDavid S. Miller 483db8dac20SDavid S. Miller if (!icmpv6_err_convert(type, code, &err) && !np->recverr) 484db8dac20SDavid S. Miller goto out; 485db8dac20SDavid S. Miller 486db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) 487db8dac20SDavid S. Miller goto out; 488db8dac20SDavid S. Miller 489b1faf566SEric Dumazet if (np->recverr) 490db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 491b1faf566SEric Dumazet 492db8dac20SDavid S. Miller sk->sk_err = err; 493db8dac20SDavid S. Miller sk->sk_error_report(sk); 494db8dac20SDavid S. Miller out: 495db8dac20SDavid S. Miller sock_put(sk); 496db8dac20SDavid S. Miller } 497db8dac20SDavid S. Miller 498db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 499d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 500d5fdd6baSBrian Haley u8 code, int offset, __be32 info ) 501db8dac20SDavid S. Miller { 502645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 503db8dac20SDavid S. Miller } 504db8dac20SDavid S. Miller 505db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) 506db8dac20SDavid S. Miller { 507db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 508db8dac20SDavid S. Miller int rc; 509db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 510db8dac20SDavid S. Miller 51147482f13SNeil Horman if (!ipv6_addr_any(&inet6_sk(sk)->daddr)) 512bdeab991STom Herbert sock_rps_save_rxhash(sk, skb); 51347482f13SNeil Horman 514db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 515db8dac20SDavid S. Miller goto drop; 516db8dac20SDavid S. Miller 517db8dac20SDavid S. Miller /* 518db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 519db8dac20SDavid S. Miller */ 520db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 521db8dac20SDavid S. Miller 522db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 523db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" 524db8dac20SDavid S. Miller " %d while full coverage %d requested\n", 525db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 526db8dac20SDavid S. Miller goto drop; 527db8dac20SDavid S. Miller } 528db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 529db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " 530db8dac20SDavid S. Miller "too small, need min %d\n", 531db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 532db8dac20SDavid S. Miller goto drop; 533db8dac20SDavid S. Miller } 534db8dac20SDavid S. Miller } 535db8dac20SDavid S. Miller 53633d480ceSEric Dumazet if (rcu_access_pointer(sk->sk_filter)) { 537db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 538db8dac20SDavid S. Miller goto drop; 539db8dac20SDavid S. Miller } 540db8dac20SDavid S. Miller 541d826eb14SEric Dumazet skb_dst_drop(skb); 542d826eb14SEric Dumazet rc = sock_queue_rcv_skb(sk, skb); 543d826eb14SEric Dumazet if (rc < 0) { 544db8dac20SDavid S. Miller /* Note that an ENOMEM error is charged twice */ 545766e9037SEric Dumazet if (rc == -ENOMEM) 546ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), 547ef28d1a2SPavel Emelyanov UDP_MIB_RCVBUFERRORS, is_udplite); 5488edf19c2SEric Dumazet goto drop_no_sk_drops_inc; 549db8dac20SDavid S. Miller } 550db8dac20SDavid S. Miller 551db8dac20SDavid S. Miller return 0; 552db8dac20SDavid S. Miller drop: 5538edf19c2SEric Dumazet atomic_inc(&sk->sk_drops); 5548edf19c2SEric Dumazet drop_no_sk_drops_inc: 555ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 556db8dac20SDavid S. Miller kfree_skb(skb); 557db8dac20SDavid S. Miller return -1; 558db8dac20SDavid S. Miller } 559db8dac20SDavid S. Miller 560920a4611SEric Dumazet static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, 561b71d1d42SEric Dumazet __be16 loc_port, const struct in6_addr *loc_addr, 562b71d1d42SEric Dumazet __be16 rmt_port, const struct in6_addr *rmt_addr, 563db8dac20SDavid S. Miller int dif) 564db8dac20SDavid S. Miller { 56588ab1932SEric Dumazet struct hlist_nulls_node *node; 566db8dac20SDavid S. Miller struct sock *s = sk; 567db8dac20SDavid S. Miller unsigned short num = ntohs(loc_port); 568db8dac20SDavid S. Miller 56988ab1932SEric Dumazet sk_nulls_for_each_from(s, node) { 570db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(s); 571db8dac20SDavid S. Miller 572920a4611SEric Dumazet if (!net_eq(sock_net(s), net)) 573b8ad0cbcSDaniel Lezcano continue; 574b8ad0cbcSDaniel Lezcano 575d4cada4aSEric Dumazet if (udp_sk(s)->udp_port_hash == num && 576d4cada4aSEric Dumazet s->sk_family == PF_INET6) { 577db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(s); 578c720c7e8SEric Dumazet if (inet->inet_dport) { 579c720c7e8SEric Dumazet if (inet->inet_dport != rmt_port) 580db8dac20SDavid S. Miller continue; 581db8dac20SDavid S. Miller } 582db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr) && 583db8dac20SDavid S. Miller !ipv6_addr_equal(&np->daddr, rmt_addr)) 584db8dac20SDavid S. Miller continue; 585db8dac20SDavid S. Miller 586db8dac20SDavid S. Miller if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) 587db8dac20SDavid S. Miller continue; 588db8dac20SDavid S. Miller 589db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 590db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) 591db8dac20SDavid S. Miller continue; 592db8dac20SDavid S. Miller } 593db8dac20SDavid S. Miller if (!inet6_mc_check(s, loc_addr, rmt_addr)) 594db8dac20SDavid S. Miller continue; 595db8dac20SDavid S. Miller return s; 596db8dac20SDavid S. Miller } 597db8dac20SDavid S. Miller } 598db8dac20SDavid S. Miller return NULL; 599db8dac20SDavid S. Miller } 600db8dac20SDavid S. Miller 601a1ab77f9SEric Dumazet static void flush_stack(struct sock **stack, unsigned int count, 602a1ab77f9SEric Dumazet struct sk_buff *skb, unsigned int final) 603a1ab77f9SEric Dumazet { 604a1ab77f9SEric Dumazet unsigned int i; 605a1ab77f9SEric Dumazet struct sock *sk; 606a1ab77f9SEric Dumazet struct sk_buff *skb1; 607a1ab77f9SEric Dumazet 608a1ab77f9SEric Dumazet for (i = 0; i < count; i++) { 609a1ab77f9SEric Dumazet skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); 610a1ab77f9SEric Dumazet 611a1ab77f9SEric Dumazet sk = stack[i]; 612f6b8f32cSEric Dumazet if (skb1) { 613c0722400SJiri Pirko if (sk_rcvqueues_full(sk, skb1)) { 614c377411fSEric Dumazet kfree_skb(skb1); 615c377411fSEric Dumazet goto drop; 616c377411fSEric Dumazet } 617a1ab77f9SEric Dumazet bh_lock_sock(sk); 618a1ab77f9SEric Dumazet if (!sock_owned_by_user(sk)) 619a1ab77f9SEric Dumazet udpv6_queue_rcv_skb(sk, skb1); 620a3a858ffSZhu Yi else if (sk_add_backlog(sk, skb1)) { 62155349790SZhu Yi kfree_skb(skb1); 622a1ab77f9SEric Dumazet bh_unlock_sock(sk); 62355349790SZhu Yi goto drop; 62455349790SZhu Yi } 62555349790SZhu Yi bh_unlock_sock(sk); 62655349790SZhu Yi continue; 62755349790SZhu Yi } 62855349790SZhu Yi drop: 629f6b8f32cSEric Dumazet atomic_inc(&sk->sk_drops); 630f6b8f32cSEric Dumazet UDP6_INC_STATS_BH(sock_net(sk), 631f6b8f32cSEric Dumazet UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); 632f6b8f32cSEric Dumazet UDP6_INC_STATS_BH(sock_net(sk), 633f6b8f32cSEric Dumazet UDP_MIB_INERRORS, IS_UDPLITE(sk)); 634a1ab77f9SEric Dumazet } 635a1ab77f9SEric Dumazet } 636db8dac20SDavid S. Miller /* 637db8dac20SDavid S. Miller * Note: called only from the BH handler context, 638db8dac20SDavid S. Miller * so we don't need to lock the hashes. 639db8dac20SDavid S. Miller */ 640e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 641b71d1d42SEric Dumazet const struct in6_addr *saddr, const struct in6_addr *daddr, 642645ca708SEric Dumazet struct udp_table *udptable) 643db8dac20SDavid S. Miller { 644a1ab77f9SEric Dumazet struct sock *sk, *stack[256 / sizeof(struct sock *)]; 645db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 646f86dcc5aSEric Dumazet struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); 647db8dac20SDavid S. Miller int dif; 648a1ab77f9SEric Dumazet unsigned int i, count = 0; 649db8dac20SDavid S. Miller 650645ca708SEric Dumazet spin_lock(&hslot->lock); 65188ab1932SEric Dumazet sk = sk_nulls_head(&hslot->head); 652db8dac20SDavid S. Miller dif = inet6_iif(skb); 653920a4611SEric Dumazet sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); 654a1ab77f9SEric Dumazet while (sk) { 655a1ab77f9SEric Dumazet stack[count++] = sk; 656a1ab77f9SEric Dumazet sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, 657a1ab77f9SEric Dumazet uh->source, saddr, dif); 658a1ab77f9SEric Dumazet if (unlikely(count == ARRAY_SIZE(stack))) { 659a1ab77f9SEric Dumazet if (!sk) 660a1ab77f9SEric Dumazet break; 661a1ab77f9SEric Dumazet flush_stack(stack, count, skb, ~0); 662a1ab77f9SEric Dumazet count = 0; 663db8dac20SDavid S. Miller } 664a1ab77f9SEric Dumazet } 665a1ab77f9SEric Dumazet /* 666a1ab77f9SEric Dumazet * before releasing the lock, we must take reference on sockets 667a1ab77f9SEric Dumazet */ 668a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 669a1ab77f9SEric Dumazet sock_hold(stack[i]); 670db8dac20SDavid S. Miller 671645ca708SEric Dumazet spin_unlock(&hslot->lock); 672a1ab77f9SEric Dumazet 673a1ab77f9SEric Dumazet if (count) { 674a1ab77f9SEric Dumazet flush_stack(stack, count, skb, count - 1); 675a1ab77f9SEric Dumazet 676a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 677a1ab77f9SEric Dumazet sock_put(stack[i]); 678a1ab77f9SEric Dumazet } else { 679a1ab77f9SEric Dumazet kfree_skb(skb); 680a1ab77f9SEric Dumazet } 681db8dac20SDavid S. Miller return 0; 682db8dac20SDavid S. Miller } 683db8dac20SDavid S. Miller 684db8dac20SDavid S. Miller static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, 685db8dac20SDavid S. Miller int proto) 686db8dac20SDavid S. Miller { 687db8dac20SDavid S. Miller int err; 688db8dac20SDavid S. Miller 689db8dac20SDavid S. Miller UDP_SKB_CB(skb)->partial_cov = 0; 690db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov = skb->len; 691db8dac20SDavid S. Miller 692db8dac20SDavid S. Miller if (proto == IPPROTO_UDPLITE) { 693db8dac20SDavid S. Miller err = udplite_checksum_init(skb, uh); 694db8dac20SDavid S. Miller if (err) 695db8dac20SDavid S. Miller return err; 696db8dac20SDavid S. Miller } 697db8dac20SDavid S. Miller 698db8dac20SDavid S. Miller if (uh->check == 0) { 699db8dac20SDavid S. Miller /* RFC 2460 section 8.1 says that we SHOULD log 700db8dac20SDavid S. Miller this error. Well, it is reasonable. 701db8dac20SDavid S. Miller */ 702db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); 703db8dac20SDavid S. Miller return 1; 704db8dac20SDavid S. Miller } 705db8dac20SDavid S. Miller if (skb->ip_summed == CHECKSUM_COMPLETE && 706db8dac20SDavid S. Miller !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, 707db8dac20SDavid S. Miller skb->len, proto, skb->csum)) 708db8dac20SDavid S. Miller skb->ip_summed = CHECKSUM_UNNECESSARY; 709db8dac20SDavid S. Miller 710db8dac20SDavid S. Miller if (!skb_csum_unnecessary(skb)) 711db8dac20SDavid S. Miller skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 712db8dac20SDavid S. Miller &ipv6_hdr(skb)->daddr, 713db8dac20SDavid S. Miller skb->len, proto, 0)); 714db8dac20SDavid S. Miller 715db8dac20SDavid S. Miller return 0; 716db8dac20SDavid S. Miller } 717db8dac20SDavid S. Miller 718645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 719db8dac20SDavid S. Miller int proto) 720db8dac20SDavid S. Miller { 7213ffe533cSAlexey Dobriyan struct net *net = dev_net(skb->dev); 722db8dac20SDavid S. Miller struct sock *sk; 723db8dac20SDavid S. Miller struct udphdr *uh; 724b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 725db8dac20SDavid S. Miller u32 ulen = 0; 726db8dac20SDavid S. Miller 727db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 728d6bc0149SBjørn Mork goto discard; 729db8dac20SDavid S. Miller 730db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 731db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 732db8dac20SDavid S. Miller uh = udp_hdr(skb); 733db8dac20SDavid S. Miller 734db8dac20SDavid S. Miller ulen = ntohs(uh->len); 735db8dac20SDavid S. Miller if (ulen > skb->len) 736db8dac20SDavid S. Miller goto short_packet; 737db8dac20SDavid S. Miller 738db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 739db8dac20SDavid S. Miller /* UDP validates ulen. */ 740db8dac20SDavid S. Miller 741db8dac20SDavid S. Miller /* Check for jumbo payload */ 742db8dac20SDavid S. Miller if (ulen == 0) 743db8dac20SDavid S. Miller ulen = skb->len; 744db8dac20SDavid S. Miller 745db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 746db8dac20SDavid S. Miller goto short_packet; 747db8dac20SDavid S. Miller 748db8dac20SDavid S. Miller if (ulen < skb->len) { 749db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 750db8dac20SDavid S. Miller goto short_packet; 751db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 752db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 753db8dac20SDavid S. Miller uh = udp_hdr(skb); 754db8dac20SDavid S. Miller } 755db8dac20SDavid S. Miller } 756db8dac20SDavid S. Miller 757db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 758db8dac20SDavid S. Miller goto discard; 759db8dac20SDavid S. Miller 760db8dac20SDavid S. Miller /* 761db8dac20SDavid S. Miller * Multicast receive code 762db8dac20SDavid S. Miller */ 763db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 764e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 765e3163493SPavel Emelyanov saddr, daddr, udptable); 766db8dac20SDavid S. Miller 767db8dac20SDavid S. Miller /* Unicast */ 768db8dac20SDavid S. Miller 769db8dac20SDavid S. Miller /* 770db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 771db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 772db8dac20SDavid S. Miller */ 773607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 774db8dac20SDavid S. Miller 775db8dac20SDavid S. Miller if (sk == NULL) { 776db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 777db8dac20SDavid S. Miller goto discard; 778db8dac20SDavid S. Miller 779db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 780db8dac20SDavid S. Miller goto discard; 781ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, 782ef28d1a2SPavel Emelyanov proto == IPPROTO_UDPLITE); 783db8dac20SDavid S. Miller 7843ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 785db8dac20SDavid S. Miller 786db8dac20SDavid S. Miller kfree_skb(skb); 787db8dac20SDavid S. Miller return 0; 788db8dac20SDavid S. Miller } 789db8dac20SDavid S. Miller 790db8dac20SDavid S. Miller /* deliver */ 791db8dac20SDavid S. Miller 792c377411fSEric Dumazet if (sk_rcvqueues_full(sk, skb)) { 793c377411fSEric Dumazet sock_put(sk); 794c377411fSEric Dumazet goto discard; 795c377411fSEric Dumazet } 796d97106eaSHerbert Xu bh_lock_sock(sk); 797db8dac20SDavid S. Miller if (!sock_owned_by_user(sk)) 798db8dac20SDavid S. Miller udpv6_queue_rcv_skb(sk, skb); 799a3a858ffSZhu Yi else if (sk_add_backlog(sk, skb)) { 80055349790SZhu Yi atomic_inc(&sk->sk_drops); 80155349790SZhu Yi bh_unlock_sock(sk); 80255349790SZhu Yi sock_put(sk); 80355349790SZhu Yi goto discard; 80455349790SZhu Yi } 805db8dac20SDavid S. Miller bh_unlock_sock(sk); 806db8dac20SDavid S. Miller sock_put(sk); 807db8dac20SDavid S. Miller return 0; 808db8dac20SDavid S. Miller 809db8dac20SDavid S. Miller short_packet: 810d6bc0149SBjørn Mork LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 811db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 812d6bc0149SBjørn Mork saddr, 813d6bc0149SBjørn Mork ntohs(uh->source), 814d6bc0149SBjørn Mork ulen, 815d6bc0149SBjørn Mork skb->len, 816d6bc0149SBjørn Mork daddr, 817d6bc0149SBjørn Mork ntohs(uh->dest)); 818db8dac20SDavid S. Miller 819db8dac20SDavid S. Miller discard: 820ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 821db8dac20SDavid S. Miller kfree_skb(skb); 822db8dac20SDavid S. Miller return 0; 823db8dac20SDavid S. Miller } 824db8dac20SDavid S. Miller 825db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 826db8dac20SDavid S. Miller { 827645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 828db8dac20SDavid S. Miller } 829db8dac20SDavid S. Miller 830db8dac20SDavid S. Miller /* 831db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 832db8dac20SDavid S. Miller */ 833db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 834db8dac20SDavid S. Miller { 835db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 836db8dac20SDavid S. Miller 83736d926b9SDenis V. Lunev if (up->pending == AF_INET) 83836d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 83936d926b9SDenis V. Lunev else if (up->pending) { 840db8dac20SDavid S. Miller up->len = 0; 841db8dac20SDavid S. Miller up->pending = 0; 842db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 843db8dac20SDavid S. Miller } 844db8dac20SDavid S. Miller } 845db8dac20SDavid S. Miller 846493c6be3SSridhar Samudrala /** 847493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 848493c6be3SSridhar Samudrala * @sk: socket we are sending on 849493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 850493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 851493c6be3SSridhar Samudrala */ 852493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 853493c6be3SSridhar Samudrala const struct in6_addr *saddr, 854493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 855493c6be3SSridhar Samudrala { 856493c6be3SSridhar Samudrala unsigned int offset; 857493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 858493c6be3SSridhar Samudrala __wsum csum = 0; 859493c6be3SSridhar Samudrala 860493c6be3SSridhar Samudrala if (skb_queue_len(&sk->sk_write_queue) == 1) { 861493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 862493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 863493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 864493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 865493c6be3SSridhar Samudrala } else { 866493c6be3SSridhar Samudrala /* 867493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 868493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 869493c6be3SSridhar Samudrala * should be together 870493c6be3SSridhar Samudrala */ 871493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 872493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 873493c6be3SSridhar Samudrala 874493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 875493c6be3SSridhar Samudrala 876493c6be3SSridhar Samudrala skb_queue_walk(&sk->sk_write_queue, skb) { 877493c6be3SSridhar Samudrala csum = csum_add(csum, skb->csum); 878493c6be3SSridhar Samudrala } 879493c6be3SSridhar Samudrala 880493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 881493c6be3SSridhar Samudrala csum); 882493c6be3SSridhar Samudrala if (uh->check == 0) 883493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 884493c6be3SSridhar Samudrala } 885493c6be3SSridhar Samudrala } 886493c6be3SSridhar Samudrala 887db8dac20SDavid S. Miller /* 888db8dac20SDavid S. Miller * Sending 889db8dac20SDavid S. Miller */ 890db8dac20SDavid S. Miller 891db8dac20SDavid S. Miller static int udp_v6_push_pending_frames(struct sock *sk) 892db8dac20SDavid S. Miller { 893db8dac20SDavid S. Miller struct sk_buff *skb; 894db8dac20SDavid S. Miller struct udphdr *uh; 895db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 896db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 8974c9483b2SDavid S. Miller struct flowi6 *fl6 = &inet->cork.fl.u.ip6; 898db8dac20SDavid S. Miller int err = 0; 899db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 900db8dac20SDavid S. Miller __wsum csum = 0; 901db8dac20SDavid S. Miller 902db8dac20SDavid S. Miller /* Grab the skbuff where UDP header space exists. */ 903db8dac20SDavid S. Miller if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 904db8dac20SDavid S. Miller goto out; 905db8dac20SDavid S. Miller 906db8dac20SDavid S. Miller /* 907db8dac20SDavid S. Miller * Create a UDP header 908db8dac20SDavid S. Miller */ 909db8dac20SDavid S. Miller uh = udp_hdr(skb); 9101958b856SDavid S. Miller uh->source = fl6->fl6_sport; 9111958b856SDavid S. Miller uh->dest = fl6->fl6_dport; 912db8dac20SDavid S. Miller uh->len = htons(up->len); 913db8dac20SDavid S. Miller uh->check = 0; 914db8dac20SDavid S. Miller 915db8dac20SDavid S. Miller if (is_udplite) 916db8dac20SDavid S. Miller csum = udplite_csum_outgoing(sk, skb); 917493c6be3SSridhar Samudrala else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 9184c9483b2SDavid S. Miller udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, 919493c6be3SSridhar Samudrala up->len); 920493c6be3SSridhar Samudrala goto send; 921493c6be3SSridhar Samudrala } else 922db8dac20SDavid S. Miller csum = udp_csum_outgoing(sk, skb); 923db8dac20SDavid S. Miller 924db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 9254c9483b2SDavid S. Miller uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 9264c9483b2SDavid S. Miller up->len, fl6->flowi6_proto, csum); 927db8dac20SDavid S. Miller if (uh->check == 0) 928db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 929db8dac20SDavid S. Miller 930493c6be3SSridhar Samudrala send: 931db8dac20SDavid S. Miller err = ip6_push_pending_frames(sk); 9326ce9e7b5SEric Dumazet if (err) { 9336ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 9346ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9356ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 9366ce9e7b5SEric Dumazet err = 0; 9376ce9e7b5SEric Dumazet } 9386ce9e7b5SEric Dumazet } else 9396ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9406ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 941db8dac20SDavid S. Miller out: 942db8dac20SDavid S. Miller up->len = 0; 943db8dac20SDavid S. Miller up->pending = 0; 944db8dac20SDavid S. Miller return err; 945db8dac20SDavid S. Miller } 946db8dac20SDavid S. Miller 947db8dac20SDavid S. Miller int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, 948db8dac20SDavid S. Miller struct msghdr *msg, size_t len) 949db8dac20SDavid S. Miller { 950db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 951db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 952db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 953db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 954db8dac20SDavid S. Miller struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; 95520c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 956db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 957db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 9584c9483b2SDavid S. Miller struct flowi6 fl6; 959db8dac20SDavid S. Miller struct dst_entry *dst; 960db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 961db8dac20SDavid S. Miller int ulen = len; 962db8dac20SDavid S. Miller int hlimit = -1; 963db8dac20SDavid S. Miller int tclass = -1; 96413b52cd4SBrian Haley int dontfrag = -1; 965db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 966db8dac20SDavid S. Miller int err; 967db8dac20SDavid S. Miller int connected = 0; 968db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 969db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 970db8dac20SDavid S. Miller 971db8dac20SDavid S. Miller /* destination address check */ 972db8dac20SDavid S. Miller if (sin6) { 973db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 974db8dac20SDavid S. Miller return -EINVAL; 975db8dac20SDavid S. Miller 976db8dac20SDavid S. Miller switch (sin6->sin6_family) { 977db8dac20SDavid S. Miller case AF_INET6: 978db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 979db8dac20SDavid S. Miller return -EINVAL; 980db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 981db8dac20SDavid S. Miller break; 982db8dac20SDavid S. Miller case AF_INET: 983db8dac20SDavid S. Miller goto do_udp_sendmsg; 984db8dac20SDavid S. Miller case AF_UNSPEC: 985db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 986db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 987db8dac20SDavid S. Miller daddr = NULL; 988db8dac20SDavid S. Miller break; 989db8dac20SDavid S. Miller default: 990db8dac20SDavid S. Miller return -EINVAL; 991db8dac20SDavid S. Miller } 992db8dac20SDavid S. Miller } else if (!up->pending) { 993db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 994db8dac20SDavid S. Miller return -EDESTADDRREQ; 995db8dac20SDavid S. Miller daddr = &np->daddr; 996db8dac20SDavid S. Miller } else 997db8dac20SDavid S. Miller daddr = NULL; 998db8dac20SDavid S. Miller 999db8dac20SDavid S. Miller if (daddr) { 1000db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 1001db8dac20SDavid S. Miller struct sockaddr_in sin; 1002db8dac20SDavid S. Miller sin.sin_family = AF_INET; 1003c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 1004db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1005db8dac20SDavid S. Miller msg->msg_name = &sin; 1006db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 1007db8dac20SDavid S. Miller do_udp_sendmsg: 1008db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 1009db8dac20SDavid S. Miller return -ENETUNREACH; 1010db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1011db8dac20SDavid S. Miller } 1012db8dac20SDavid S. Miller } 1013db8dac20SDavid S. Miller 1014db8dac20SDavid S. Miller if (up->pending == AF_INET) 1015db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1016db8dac20SDavid S. Miller 1017db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1018db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1019db8dac20SDavid S. Miller */ 1020db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1021db8dac20SDavid S. Miller return -EMSGSIZE; 1022db8dac20SDavid S. Miller 1023db8dac20SDavid S. Miller if (up->pending) { 1024db8dac20SDavid S. Miller /* 1025db8dac20SDavid S. Miller * There are pending frames. 1026db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1027db8dac20SDavid S. Miller */ 1028db8dac20SDavid S. Miller lock_sock(sk); 1029db8dac20SDavid S. Miller if (likely(up->pending)) { 1030db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1031db8dac20SDavid S. Miller release_sock(sk); 1032db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1033db8dac20SDavid S. Miller } 1034db8dac20SDavid S. Miller dst = NULL; 1035db8dac20SDavid S. Miller goto do_append_data; 1036db8dac20SDavid S. Miller } 1037db8dac20SDavid S. Miller release_sock(sk); 1038db8dac20SDavid S. Miller } 1039db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1040db8dac20SDavid S. Miller 10414c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 1042db8dac20SDavid S. Miller 1043db8dac20SDavid S. Miller if (sin6) { 1044db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1045db8dac20SDavid S. Miller return -EINVAL; 1046db8dac20SDavid S. Miller 10471958b856SDavid S. Miller fl6.fl6_dport = sin6->sin6_port; 1048db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1049db8dac20SDavid S. Miller 1050db8dac20SDavid S. Miller if (np->sndflow) { 10514c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 10524c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 10534c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1054db8dac20SDavid S. Miller if (flowlabel == NULL) 1055db8dac20SDavid S. Miller return -EINVAL; 1056db8dac20SDavid S. Miller daddr = &flowlabel->dst; 1057db8dac20SDavid S. Miller } 1058db8dac20SDavid S. Miller } 1059db8dac20SDavid S. Miller 1060db8dac20SDavid S. Miller /* 1061db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1062db8dac20SDavid S. Miller * sk->sk_dst_cache. 1063db8dac20SDavid S. Miller */ 1064db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1065db8dac20SDavid S. Miller ipv6_addr_equal(daddr, &np->daddr)) 1066db8dac20SDavid S. Miller daddr = &np->daddr; 1067db8dac20SDavid S. Miller 1068db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1069db8dac20SDavid S. Miller sin6->sin6_scope_id && 1070db8dac20SDavid S. Miller ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) 10714c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 1072db8dac20SDavid S. Miller } else { 1073db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1074db8dac20SDavid S. Miller return -EDESTADDRREQ; 1075db8dac20SDavid S. Miller 10761958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 1077db8dac20SDavid S. Miller daddr = &np->daddr; 10784c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 1079db8dac20SDavid S. Miller connected = 1; 1080db8dac20SDavid S. Miller } 1081db8dac20SDavid S. Miller 10824c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 10834c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 1084db8dac20SDavid S. Miller 10854c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 10864c9483b2SDavid S. Miller fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 10879f690db7SYang Hongyang 10884c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 108951953d5bSBrian Haley 1090db8dac20SDavid S. Miller if (msg->msg_controllen) { 1091db8dac20SDavid S. Miller opt = &opt_space; 1092db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1093db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 1094db8dac20SDavid S. Miller 1095ec0506dbSMaciej Żenczykowski err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, 1096ec0506dbSMaciej Żenczykowski &hlimit, &tclass, &dontfrag); 1097db8dac20SDavid S. Miller if (err < 0) { 1098db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1099db8dac20SDavid S. Miller return err; 1100db8dac20SDavid S. Miller } 11014c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 11024c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1103db8dac20SDavid S. Miller if (flowlabel == NULL) 1104db8dac20SDavid S. Miller return -EINVAL; 1105db8dac20SDavid S. Miller } 1106db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1107db8dac20SDavid S. Miller opt = NULL; 1108db8dac20SDavid S. Miller connected = 0; 1109db8dac20SDavid S. Miller } 1110db8dac20SDavid S. Miller if (opt == NULL) 1111db8dac20SDavid S. Miller opt = np->opt; 1112db8dac20SDavid S. Miller if (flowlabel) 1113db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1114db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 1115db8dac20SDavid S. Miller 11164c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 1117876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 11184c9483b2SDavid S. Miller ipv6_addr_copy(&fl6.daddr, daddr); 1119876c7f41SBrian Haley else 11204c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 11214c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 11224c9483b2SDavid S. Miller ipv6_addr_copy(&fl6.saddr, &np->saddr); 11231958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 1124db8dac20SDavid S. Miller 11254c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 112620c59de2SArnaud Ebalard if (final_p) 1127db8dac20SDavid S. Miller connected = 0; 1128db8dac20SDavid S. Miller 11294c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { 11304c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 1131db8dac20SDavid S. Miller connected = 0; 1132db8dac20SDavid S. Miller } 1133db8dac20SDavid S. Miller 11344c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 1135db8dac20SDavid S. Miller 11364c9483b2SDavid S. Miller dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); 113768d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 113868d0c6d3SDavid S. Miller err = PTR_ERR(dst); 113968d0c6d3SDavid S. Miller dst = NULL; 1140db8dac20SDavid S. Miller goto out; 1141db8dac20SDavid S. Miller } 1142db8dac20SDavid S. Miller 1143db8dac20SDavid S. Miller if (hlimit < 0) { 11444c9483b2SDavid S. Miller if (ipv6_addr_is_multicast(&fl6.daddr)) 1145db8dac20SDavid S. Miller hlimit = np->mcast_hops; 1146db8dac20SDavid S. Miller else 1147db8dac20SDavid S. Miller hlimit = np->hop_limit; 1148db8dac20SDavid S. Miller if (hlimit < 0) 11496b75d090SYOSHIFUJI Hideaki hlimit = ip6_dst_hoplimit(dst); 1150db8dac20SDavid S. Miller } 1151db8dac20SDavid S. Miller 1152db8dac20SDavid S. Miller if (tclass < 0) 1153e651f03aSGerrit Renker tclass = np->tclass; 1154db8dac20SDavid S. Miller 115513b52cd4SBrian Haley if (dontfrag < 0) 115613b52cd4SBrian Haley dontfrag = np->dontfrag; 115713b52cd4SBrian Haley 1158db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1159db8dac20SDavid S. Miller goto do_confirm; 1160db8dac20SDavid S. Miller back_from_confirm: 1161db8dac20SDavid S. Miller 1162db8dac20SDavid S. Miller lock_sock(sk); 1163db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1164db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1165db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1166db8dac20SDavid S. Miller release_sock(sk); 1167db8dac20SDavid S. Miller 1168db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); 1169db8dac20SDavid S. Miller err = -EINVAL; 1170db8dac20SDavid S. Miller goto out; 1171db8dac20SDavid S. Miller } 1172db8dac20SDavid S. Miller 1173db8dac20SDavid S. Miller up->pending = AF_INET6; 1174db8dac20SDavid S. Miller 1175db8dac20SDavid S. Miller do_append_data: 1176db8dac20SDavid S. Miller up->len += ulen; 1177db8dac20SDavid S. Miller getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1178db8dac20SDavid S. Miller err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, 11794c9483b2SDavid S. Miller sizeof(struct udphdr), hlimit, tclass, opt, &fl6, 1180db8dac20SDavid S. Miller (struct rt6_info*)dst, 118113b52cd4SBrian Haley corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); 1182db8dac20SDavid S. Miller if (err) 1183db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1184db8dac20SDavid S. Miller else if (!corkreq) 1185db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1186db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1187db8dac20SDavid S. Miller up->pending = 0; 1188db8dac20SDavid S. Miller 1189db8dac20SDavid S. Miller if (dst) { 1190db8dac20SDavid S. Miller if (connected) { 1191db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 11924c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.daddr, &np->daddr) ? 1193db8dac20SDavid S. Miller &np->daddr : NULL, 1194db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 11954c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1196db8dac20SDavid S. Miller &np->saddr : 1197db8dac20SDavid S. Miller #endif 1198db8dac20SDavid S. Miller NULL); 1199db8dac20SDavid S. Miller } else { 1200db8dac20SDavid S. Miller dst_release(dst); 1201db8dac20SDavid S. Miller } 1202a3c96089SYOSHIFUJI Hideaki dst = NULL; 1203db8dac20SDavid S. Miller } 1204db8dac20SDavid S. Miller 1205db8dac20SDavid S. Miller if (err > 0) 1206db8dac20SDavid S. Miller err = np->recverr ? net_xmit_errno(err) : 0; 1207db8dac20SDavid S. Miller release_sock(sk); 1208db8dac20SDavid S. Miller out: 1209a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1210db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1211db8dac20SDavid S. Miller if (!err) 1212db8dac20SDavid S. Miller return len; 1213db8dac20SDavid S. Miller /* 1214db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1215db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1216db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1217db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1218db8dac20SDavid S. Miller * seems like overkill. 1219db8dac20SDavid S. Miller */ 1220db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 1221235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 1222235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1223db8dac20SDavid S. Miller } 1224db8dac20SDavid S. Miller return err; 1225db8dac20SDavid S. Miller 1226db8dac20SDavid S. Miller do_confirm: 1227db8dac20SDavid S. Miller dst_confirm(dst); 1228db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1229db8dac20SDavid S. Miller goto back_from_confirm; 1230db8dac20SDavid S. Miller err = 0; 1231db8dac20SDavid S. Miller goto out; 1232db8dac20SDavid S. Miller } 1233db8dac20SDavid S. Miller 12347d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1235db8dac20SDavid S. Miller { 1236db8dac20SDavid S. Miller lock_sock(sk); 1237db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1238db8dac20SDavid S. Miller release_sock(sk); 1239db8dac20SDavid S. Miller 1240db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1241db8dac20SDavid S. Miller } 1242db8dac20SDavid S. Miller 1243db8dac20SDavid S. Miller /* 1244db8dac20SDavid S. Miller * Socket option code for UDP 1245db8dac20SDavid S. Miller */ 1246db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1247b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1248db8dac20SDavid S. Miller { 1249db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1250db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1251db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1252db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1253db8dac20SDavid S. Miller } 1254db8dac20SDavid S. Miller 1255db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1256db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1257b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1258db8dac20SDavid S. Miller { 1259db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1260db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1261db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1262db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1263db8dac20SDavid S. Miller } 1264db8dac20SDavid S. Miller #endif 1265db8dac20SDavid S. Miller 1266db8dac20SDavid S. Miller int 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 ipv6_getsockopt(sk, level, optname, optval, optlen); 1272db8dac20SDavid S. Miller } 1273db8dac20SDavid S. Miller 1274db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1275db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1276db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1277db8dac20SDavid S. Miller { 1278db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1279db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1280db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1281db8dac20SDavid S. Miller } 1282db8dac20SDavid S. Miller #endif 1283db8dac20SDavid S. Miller 1284ba735425SSridhar Samudrala static int udp6_ufo_send_check(struct sk_buff *skb) 1285ba735425SSridhar Samudrala { 1286b71d1d42SEric Dumazet const struct ipv6hdr *ipv6h; 1287ba735425SSridhar Samudrala struct udphdr *uh; 1288ba735425SSridhar Samudrala 1289ba735425SSridhar Samudrala if (!pskb_may_pull(skb, sizeof(*uh))) 1290ba735425SSridhar Samudrala return -EINVAL; 1291ba735425SSridhar Samudrala 1292ba735425SSridhar Samudrala ipv6h = ipv6_hdr(skb); 1293ba735425SSridhar Samudrala uh = udp_hdr(skb); 1294ba735425SSridhar Samudrala 1295ba735425SSridhar Samudrala uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, 1296ba735425SSridhar Samudrala IPPROTO_UDP, 0); 1297ba735425SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 1298ba735425SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 1299ba735425SSridhar Samudrala skb->ip_summed = CHECKSUM_PARTIAL; 1300ba735425SSridhar Samudrala return 0; 1301ba735425SSridhar Samudrala } 1302ba735425SSridhar Samudrala 1303c8f44affSMichał Mirosław static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, 1304c8f44affSMichał Mirosław netdev_features_t features) 1305ba735425SSridhar Samudrala { 1306ba735425SSridhar Samudrala struct sk_buff *segs = ERR_PTR(-EINVAL); 1307ba735425SSridhar Samudrala unsigned int mss; 1308ba735425SSridhar Samudrala unsigned int unfrag_ip6hlen, unfrag_len; 1309ba735425SSridhar Samudrala struct frag_hdr *fptr; 1310ba735425SSridhar Samudrala u8 *mac_start, *prevhdr; 1311ba735425SSridhar Samudrala u8 nexthdr; 1312ba735425SSridhar Samudrala u8 frag_hdr_sz = sizeof(struct frag_hdr); 1313ba735425SSridhar Samudrala int offset; 1314ba735425SSridhar Samudrala __wsum csum; 1315ba735425SSridhar Samudrala 1316ba735425SSridhar Samudrala mss = skb_shinfo(skb)->gso_size; 1317ba735425SSridhar Samudrala if (unlikely(skb->len <= mss)) 1318ba735425SSridhar Samudrala goto out; 1319ba735425SSridhar Samudrala 1320ba735425SSridhar Samudrala if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { 1321ba735425SSridhar Samudrala /* Packet is from an untrusted source, reset gso_segs. */ 1322ba735425SSridhar Samudrala int type = skb_shinfo(skb)->gso_type; 1323ba735425SSridhar Samudrala 1324ba735425SSridhar Samudrala if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || 1325ba735425SSridhar Samudrala !(type & (SKB_GSO_UDP)))) 1326ba735425SSridhar Samudrala goto out; 1327ba735425SSridhar Samudrala 1328ba735425SSridhar Samudrala skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); 1329ba735425SSridhar Samudrala 1330ba735425SSridhar Samudrala segs = NULL; 1331ba735425SSridhar Samudrala goto out; 1332ba735425SSridhar Samudrala } 1333ba735425SSridhar Samudrala 1334ba735425SSridhar Samudrala /* Do software UFO. Complete and fill in the UDP checksum as HW cannot 1335ba735425SSridhar Samudrala * do checksum of UDP packets sent as multiple IP fragments. 1336ba735425SSridhar Samudrala */ 133796339d6cSShan Wei offset = skb_checksum_start_offset(skb); 1338ba735425SSridhar Samudrala csum = skb_checksum(skb, offset, skb->len- offset, 0); 1339ba735425SSridhar Samudrala offset += skb->csum_offset; 1340ba735425SSridhar Samudrala *(__sum16 *)(skb->data + offset) = csum_fold(csum); 1341ba735425SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 1342ba735425SSridhar Samudrala 1343ba735425SSridhar Samudrala /* Check if there is enough headroom to insert fragment header. */ 1344a9cf73eaSShan Wei if ((skb_mac_header(skb) < skb->head + frag_hdr_sz) && 1345ba735425SSridhar Samudrala pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) 1346ba735425SSridhar Samudrala goto out; 1347ba735425SSridhar Samudrala 1348ba735425SSridhar Samudrala /* Find the unfragmentable header and shift it left by frag_hdr_sz 1349ba735425SSridhar Samudrala * bytes to insert fragment header. 1350ba735425SSridhar Samudrala */ 1351ba735425SSridhar Samudrala unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); 1352ba735425SSridhar Samudrala nexthdr = *prevhdr; 1353ba735425SSridhar Samudrala *prevhdr = NEXTHDR_FRAGMENT; 1354ba735425SSridhar Samudrala unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + 1355ba735425SSridhar Samudrala unfrag_ip6hlen; 1356ba735425SSridhar Samudrala mac_start = skb_mac_header(skb); 1357ba735425SSridhar Samudrala memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); 1358ba735425SSridhar Samudrala 1359ba735425SSridhar Samudrala skb->mac_header -= frag_hdr_sz; 1360ba735425SSridhar Samudrala skb->network_header -= frag_hdr_sz; 1361ba735425SSridhar Samudrala 1362ba735425SSridhar Samudrala fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); 1363ba735425SSridhar Samudrala fptr->nexthdr = nexthdr; 1364ba735425SSridhar Samudrala fptr->reserved = 0; 136587c48fa3SEric Dumazet ipv6_select_ident(fptr, (struct rt6_info *)skb_dst(skb)); 1366ba735425SSridhar Samudrala 1367ba735425SSridhar Samudrala /* Fragment the skb. ipv6 header and the remaining fields of the 1368ba735425SSridhar Samudrala * fragment header are updated in ipv6_gso_segment() 1369ba735425SSridhar Samudrala */ 1370ba735425SSridhar Samudrala segs = skb_segment(skb, features); 1371ba735425SSridhar Samudrala 1372ba735425SSridhar Samudrala out: 1373ba735425SSridhar Samudrala return segs; 1374ba735425SSridhar Samudrala } 1375ba735425SSridhar Samudrala 137641135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1377db8dac20SDavid S. Miller .handler = udpv6_rcv, 1378db8dac20SDavid S. Miller .err_handler = udpv6_err, 1379ba735425SSridhar Samudrala .gso_send_check = udp6_ufo_send_check, 1380ba735425SSridhar Samudrala .gso_segment = udp6_ufo_fragment, 1381db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1382db8dac20SDavid S. Miller }; 1383db8dac20SDavid S. Miller 1384db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1385db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1386db8dac20SDavid S. Miller 1387db8dac20SDavid S. Miller static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) 1388db8dac20SDavid S. Miller { 1389db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sp); 1390db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sp); 1391b71d1d42SEric Dumazet const struct in6_addr *dest, *src; 1392db8dac20SDavid S. Miller __u16 destp, srcp; 1393db8dac20SDavid S. Miller 1394db8dac20SDavid S. Miller dest = &np->daddr; 1395db8dac20SDavid S. Miller src = &np->rcv_saddr; 1396c720c7e8SEric Dumazet destp = ntohs(inet->inet_dport); 1397c720c7e8SEric Dumazet srcp = ntohs(inet->inet_sport); 1398db8dac20SDavid S. Miller seq_printf(seq, 1399f86dcc5aSEric Dumazet "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 140071338aa7SDan Rosenberg "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", 1401db8dac20SDavid S. Miller bucket, 1402db8dac20SDavid S. Miller src->s6_addr32[0], src->s6_addr32[1], 1403db8dac20SDavid S. Miller src->s6_addr32[2], src->s6_addr32[3], srcp, 1404db8dac20SDavid S. Miller dest->s6_addr32[0], dest->s6_addr32[1], 1405db8dac20SDavid S. Miller dest->s6_addr32[2], dest->s6_addr32[3], destp, 1406db8dac20SDavid S. Miller sp->sk_state, 140731e6d363SEric Dumazet sk_wmem_alloc_get(sp), 140831e6d363SEric Dumazet sk_rmem_alloc_get(sp), 1409db8dac20SDavid S. Miller 0, 0L, 0, 1410db8dac20SDavid S. Miller sock_i_uid(sp), 0, 1411db8dac20SDavid S. Miller sock_i_ino(sp), 1412cb61cb9bSEric Dumazet atomic_read(&sp->sk_refcnt), sp, 1413cb61cb9bSEric Dumazet atomic_read(&sp->sk_drops)); 1414db8dac20SDavid S. Miller } 1415db8dac20SDavid S. Miller 1416db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1417db8dac20SDavid S. Miller { 1418db8dac20SDavid S. Miller if (v == SEQ_START_TOKEN) 1419db8dac20SDavid S. Miller seq_printf(seq, 1420db8dac20SDavid S. Miller " sl " 1421db8dac20SDavid S. Miller "local_address " 1422db8dac20SDavid S. Miller "remote_address " 1423db8dac20SDavid S. Miller "st tx_queue rx_queue tr tm->when retrnsmt" 1424cb61cb9bSEric Dumazet " uid timeout inode ref pointer drops\n"); 1425db8dac20SDavid S. Miller else 1426db8dac20SDavid S. Miller udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); 1427db8dac20SDavid S. Miller return 0; 1428db8dac20SDavid S. Miller } 1429db8dac20SDavid S. Miller 143073cb88ecSArjan van de Ven static const struct file_operations udp6_afinfo_seq_fops = { 143173cb88ecSArjan van de Ven .owner = THIS_MODULE, 143273cb88ecSArjan van de Ven .open = udp_seq_open, 143373cb88ecSArjan van de Ven .read = seq_read, 143473cb88ecSArjan van de Ven .llseek = seq_lseek, 143573cb88ecSArjan van de Ven .release = seq_release_net 143673cb88ecSArjan van de Ven }; 143773cb88ecSArjan van de Ven 1438db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1439db8dac20SDavid S. Miller .name = "udp6", 1440db8dac20SDavid S. Miller .family = AF_INET6, 1441645ca708SEric Dumazet .udp_table = &udp_table, 144273cb88ecSArjan van de Ven .seq_fops = &udp6_afinfo_seq_fops, 1443dda61925SDenis V. Lunev .seq_ops = { 1444dda61925SDenis V. Lunev .show = udp6_seq_show, 1445dda61925SDenis V. Lunev }, 1446db8dac20SDavid S. Miller }; 1447db8dac20SDavid S. Miller 14482c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1449db8dac20SDavid S. Miller { 14500c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1451db8dac20SDavid S. Miller } 1452db8dac20SDavid S. Miller 14530c96d8c5SDaniel Lezcano void udp6_proc_exit(struct net *net) { 14540c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1455db8dac20SDavid S. Miller } 1456db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1457db8dac20SDavid S. Miller 1458db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1459db8dac20SDavid S. Miller 1460db8dac20SDavid S. Miller struct proto udpv6_prot = { 1461db8dac20SDavid S. Miller .name = "UDPv6", 1462db8dac20SDavid S. Miller .owner = THIS_MODULE, 1463db8dac20SDavid S. Miller .close = udp_lib_close, 1464db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1465db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1466db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1467db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1468db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1469db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1470db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1471db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1472db8dac20SDavid S. Miller .backlog_rcv = udpv6_queue_rcv_skb, 1473db8dac20SDavid S. Miller .hash = udp_lib_hash, 1474db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1475719f8358SEric Dumazet .rehash = udp_v6_rehash, 1476db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1477db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1478db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1479db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1480db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1481db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1482271b72c7SEric Dumazet .slab_flags = SLAB_DESTROY_BY_RCU, 1483645ca708SEric Dumazet .h.udp_table = &udp_table, 1484db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1485db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1486db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1487db8dac20SDavid S. Miller #endif 1488fcbdf09dSOctavian Purdila .clear_sk = sk_prot_clear_portaddr_nulls, 1489db8dac20SDavid S. Miller }; 1490db8dac20SDavid S. Miller 1491db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1492db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1493db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1494db8dac20SDavid S. Miller .prot = &udpv6_prot, 1495db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1496db8dac20SDavid S. Miller .no_check = UDP_CSUM_DEFAULT, 1497db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1498db8dac20SDavid S. Miller }; 1499db8dac20SDavid S. Miller 1500db8dac20SDavid S. Miller 1501db8dac20SDavid S. Miller int __init udpv6_init(void) 1502db8dac20SDavid S. Miller { 1503db8dac20SDavid S. Miller int ret; 1504db8dac20SDavid S. Miller 1505db8dac20SDavid S. Miller ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 1506db8dac20SDavid S. Miller if (ret) 1507db8dac20SDavid S. Miller goto out; 1508db8dac20SDavid S. Miller 1509db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1510db8dac20SDavid S. Miller if (ret) 1511db8dac20SDavid S. Miller goto out_udpv6_protocol; 1512db8dac20SDavid S. Miller out: 1513db8dac20SDavid S. Miller return ret; 1514db8dac20SDavid S. Miller 1515db8dac20SDavid S. Miller out_udpv6_protocol: 1516db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1517db8dac20SDavid S. Miller goto out; 1518db8dac20SDavid S. Miller } 1519db8dac20SDavid S. Miller 1520db8dac20SDavid S. Miller void udpv6_exit(void) 1521db8dac20SDavid S. Miller { 1522db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1523db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1524db8dac20SDavid S. Miller } 1525