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> 4872289b96STom Herbert #include <net/inet6_hashtables.h> 49076bb0c8SEliezer Tamir #include <net/busy_poll.h> 50db8dac20SDavid S. Miller 51db8dac20SDavid S. Miller #include <linux/proc_fs.h> 52db8dac20SDavid S. Miller #include <linux/seq_file.h> 5322911fc5SEric Dumazet #include <trace/events/skb.h> 54db8dac20SDavid S. Miller #include "udp_impl.h" 55db8dac20SDavid S. Miller 56b50026b5SHannes Frederic Sowa static unsigned int udp6_ehashfn(struct net *net, 57b50026b5SHannes Frederic Sowa const struct in6_addr *laddr, 58b50026b5SHannes Frederic Sowa const u16 lport, 59b50026b5SHannes Frederic Sowa const struct in6_addr *faddr, 60b50026b5SHannes Frederic Sowa const __be16 fport) 61b50026b5SHannes Frederic Sowa { 621bbdceefSHannes Frederic Sowa static u32 udp6_ehash_secret __read_mostly; 631bbdceefSHannes Frederic Sowa static u32 udp_ipv6_hash_secret __read_mostly; 641bbdceefSHannes Frederic Sowa 651bbdceefSHannes Frederic Sowa u32 lhash, fhash; 661bbdceefSHannes Frederic Sowa 671bbdceefSHannes Frederic Sowa net_get_random_once(&udp6_ehash_secret, 681bbdceefSHannes Frederic Sowa sizeof(udp6_ehash_secret)); 691bbdceefSHannes Frederic Sowa net_get_random_once(&udp_ipv6_hash_secret, 701bbdceefSHannes Frederic Sowa sizeof(udp_ipv6_hash_secret)); 711bbdceefSHannes Frederic Sowa 721bbdceefSHannes Frederic Sowa lhash = (__force u32)laddr->s6_addr32[3]; 731bbdceefSHannes Frederic Sowa fhash = __ipv6_addr_jhash(faddr, udp_ipv6_hash_secret); 741bbdceefSHannes Frederic Sowa 75b50026b5SHannes Frederic Sowa return __inet6_ehashfn(lhash, lport, fhash, fport, 761bbdceefSHannes Frederic Sowa udp_ipv6_hash_secret + net_hash_mix(net)); 77b50026b5SHannes Frederic Sowa } 78b50026b5SHannes Frederic Sowa 79b2f5e7cdSVlad Yasevich int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) 80b2f5e7cdSVlad Yasevich { 81b2f5e7cdSVlad Yasevich const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); 82b2f5e7cdSVlad Yasevich int sk_ipv6only = ipv6_only_sock(sk); 83b2f5e7cdSVlad Yasevich int sk2_ipv6only = inet_v6_ipv6only(sk2); 84efe4208fSEric Dumazet int addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr); 85b2f5e7cdSVlad Yasevich int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; 86b2f5e7cdSVlad Yasevich 87b2f5e7cdSVlad Yasevich /* if both are mapped, treat as IPv4 */ 88b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) 89499923c7SVlad Yasevich return (!sk2_ipv6only && 9050805466SEric Dumazet (!sk->sk_rcv_saddr || !sk2->sk_rcv_saddr || 9150805466SEric Dumazet sk->sk_rcv_saddr == sk2->sk_rcv_saddr)); 92b2f5e7cdSVlad Yasevich 93b2f5e7cdSVlad Yasevich if (addr_type2 == IPV6_ADDR_ANY && 94b2f5e7cdSVlad Yasevich !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) 95b2f5e7cdSVlad Yasevich return 1; 96b2f5e7cdSVlad Yasevich 97b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_ANY && 98b2f5e7cdSVlad Yasevich !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) 99b2f5e7cdSVlad Yasevich return 1; 100b2f5e7cdSVlad Yasevich 101b2f5e7cdSVlad Yasevich if (sk2_rcv_saddr6 && 102efe4208fSEric Dumazet ipv6_addr_equal(&sk->sk_v6_rcv_saddr, sk2_rcv_saddr6)) 103b2f5e7cdSVlad Yasevich return 1; 104b2f5e7cdSVlad Yasevich 105b2f5e7cdSVlad Yasevich return 0; 106b2f5e7cdSVlad Yasevich } 107b2f5e7cdSVlad Yasevich 108d4cada4aSEric Dumazet static unsigned int udp6_portaddr_hash(struct net *net, 109d4cada4aSEric Dumazet const struct in6_addr *addr6, 110d4cada4aSEric Dumazet unsigned int port) 111d4cada4aSEric Dumazet { 112d4cada4aSEric Dumazet unsigned int hash, mix = net_hash_mix(net); 113d4cada4aSEric Dumazet 114d4cada4aSEric Dumazet if (ipv6_addr_any(addr6)) 115d4cada4aSEric Dumazet hash = jhash_1word(0, mix); 116856540eeSBrian Haley else if (ipv6_addr_v4mapped(addr6)) 1170eae88f3SEric Dumazet hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); 118d4cada4aSEric Dumazet else 1190eae88f3SEric Dumazet hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); 120d4cada4aSEric Dumazet 121d4cada4aSEric Dumazet return hash ^ port; 122d4cada4aSEric Dumazet } 123d4cada4aSEric Dumazet 124d4cada4aSEric Dumazet 1256ba5a3c5SPavel Emelyanov int udp_v6_get_port(struct sock *sk, unsigned short snum) 126db8dac20SDavid S. Miller { 12730fff923SEric Dumazet unsigned int hash2_nulladdr = 12830fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); 12930fff923SEric Dumazet unsigned int hash2_partial = 130efe4208fSEric Dumazet udp6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0); 13130fff923SEric Dumazet 132d4cada4aSEric Dumazet /* precompute partial secondary hash */ 13330fff923SEric Dumazet udp_sk(sk)->udp_portaddr_hash = hash2_partial; 13430fff923SEric Dumazet return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); 135db8dac20SDavid S. Miller } 136db8dac20SDavid S. Miller 137719f8358SEric Dumazet static void udp_v6_rehash(struct sock *sk) 138719f8358SEric Dumazet { 139719f8358SEric Dumazet u16 new_hash = udp6_portaddr_hash(sock_net(sk), 140efe4208fSEric Dumazet &sk->sk_v6_rcv_saddr, 141719f8358SEric Dumazet inet_sk(sk)->inet_num); 142719f8358SEric Dumazet 143719f8358SEric Dumazet udp_lib_rehash(sk, new_hash); 144719f8358SEric Dumazet } 145719f8358SEric Dumazet 146645ca708SEric Dumazet static inline int compute_score(struct sock *sk, struct net *net, 147645ca708SEric Dumazet unsigned short hnum, 14888440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 14988440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 150645ca708SEric Dumazet int dif) 151db8dac20SDavid S. Miller { 152645ca708SEric Dumazet int score = -1; 153db8dac20SDavid S. Miller 154d4cada4aSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 155db8dac20SDavid S. Miller sk->sk_family == PF_INET6) { 156645ca708SEric Dumazet struct inet_sock *inet = inet_sk(sk); 157645ca708SEric Dumazet 158645ca708SEric Dumazet score = 0; 159c720c7e8SEric Dumazet if (inet->inet_dport) { 160c720c7e8SEric Dumazet if (inet->inet_dport != sport) 161645ca708SEric Dumazet return -1; 162db8dac20SDavid S. Miller score++; 163db8dac20SDavid S. Miller } 164efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { 165efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) 166645ca708SEric Dumazet return -1; 167db8dac20SDavid S. Miller score++; 168db8dac20SDavid S. Miller } 169efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 170efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) 171645ca708SEric Dumazet return -1; 172db8dac20SDavid S. Miller score++; 173db8dac20SDavid S. Miller } 174db8dac20SDavid S. Miller if (sk->sk_bound_dev_if) { 175db8dac20SDavid S. Miller if (sk->sk_bound_dev_if != dif) 176645ca708SEric Dumazet return -1; 177db8dac20SDavid S. Miller score++; 178db8dac20SDavid S. Miller } 179645ca708SEric Dumazet } 180645ca708SEric Dumazet return score; 181645ca708SEric Dumazet } 182645ca708SEric Dumazet 183fddc17deSEric Dumazet #define SCORE2_MAX (1 + 1 + 1) 184fddc17deSEric Dumazet static inline int compute_score2(struct sock *sk, struct net *net, 185fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 186fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned short hnum, 187fddc17deSEric Dumazet int dif) 188fddc17deSEric Dumazet { 189fddc17deSEric Dumazet int score = -1; 190fddc17deSEric Dumazet 191fddc17deSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 192fddc17deSEric Dumazet sk->sk_family == PF_INET6) { 193fddc17deSEric Dumazet struct inet_sock *inet = inet_sk(sk); 194fddc17deSEric Dumazet 195efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) 196fddc17deSEric Dumazet return -1; 197fddc17deSEric Dumazet score = 0; 198fddc17deSEric Dumazet if (inet->inet_dport) { 199fddc17deSEric Dumazet if (inet->inet_dport != sport) 200fddc17deSEric Dumazet return -1; 201fddc17deSEric Dumazet score++; 202fddc17deSEric Dumazet } 203efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 204efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) 205fddc17deSEric Dumazet return -1; 206fddc17deSEric Dumazet score++; 207fddc17deSEric Dumazet } 208fddc17deSEric Dumazet if (sk->sk_bound_dev_if) { 209fddc17deSEric Dumazet if (sk->sk_bound_dev_if != dif) 210fddc17deSEric Dumazet return -1; 211fddc17deSEric Dumazet score++; 212fddc17deSEric Dumazet } 213fddc17deSEric Dumazet } 214fddc17deSEric Dumazet return score; 215fddc17deSEric Dumazet } 216fddc17deSEric Dumazet 217fddc17deSEric Dumazet 218fddc17deSEric Dumazet /* called with read_rcu_lock() */ 219fddc17deSEric Dumazet static struct sock *udp6_lib_lookup2(struct net *net, 220fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 221fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned int hnum, int dif, 222fddc17deSEric Dumazet struct udp_hslot *hslot2, unsigned int slot2) 223fddc17deSEric Dumazet { 224fddc17deSEric Dumazet struct sock *sk, *result; 225fddc17deSEric Dumazet struct hlist_nulls_node *node; 22672289b96STom Herbert int score, badness, matches = 0, reuseport = 0; 22772289b96STom Herbert u32 hash = 0; 228fddc17deSEric Dumazet 229fddc17deSEric Dumazet begin: 230fddc17deSEric Dumazet result = NULL; 231fddc17deSEric Dumazet badness = -1; 232fddc17deSEric Dumazet udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { 233fddc17deSEric Dumazet score = compute_score2(sk, net, saddr, sport, 234fddc17deSEric Dumazet daddr, hnum, dif); 235fddc17deSEric Dumazet if (score > badness) { 236fddc17deSEric Dumazet result = sk; 237fddc17deSEric Dumazet badness = score; 23872289b96STom Herbert reuseport = sk->sk_reuseport; 23972289b96STom Herbert if (reuseport) { 240b50026b5SHannes Frederic Sowa hash = udp6_ehashfn(net, daddr, hnum, 24172289b96STom Herbert saddr, sport); 24272289b96STom Herbert matches = 1; 24372289b96STom Herbert } else if (score == SCORE2_MAX) 244fddc17deSEric Dumazet goto exact_match; 24572289b96STom Herbert } else if (score == badness && reuseport) { 24672289b96STom Herbert matches++; 24772289b96STom Herbert if (((u64)hash * matches) >> 32 == 0) 24872289b96STom Herbert result = sk; 24972289b96STom Herbert hash = next_pseudo_random32(hash); 250fddc17deSEric Dumazet } 251fddc17deSEric Dumazet } 252fddc17deSEric Dumazet /* 253fddc17deSEric Dumazet * if the nulls value we got at the end of this lookup is 254fddc17deSEric Dumazet * not the expected one, we must restart lookup. 255fddc17deSEric Dumazet * We probably met an item that was moved to another chain. 256fddc17deSEric Dumazet */ 257fddc17deSEric Dumazet if (get_nulls_value(node) != slot2) 258fddc17deSEric Dumazet goto begin; 259fddc17deSEric Dumazet 260fddc17deSEric Dumazet if (result) { 261fddc17deSEric Dumazet exact_match: 262c31504dcSEric Dumazet if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) 263fddc17deSEric Dumazet result = NULL; 264fddc17deSEric Dumazet else if (unlikely(compute_score2(result, net, saddr, sport, 265fddc17deSEric Dumazet daddr, hnum, dif) < badness)) { 266fddc17deSEric Dumazet sock_put(result); 267fddc17deSEric Dumazet goto begin; 268fddc17deSEric Dumazet } 269fddc17deSEric Dumazet } 270fddc17deSEric Dumazet return result; 271fddc17deSEric Dumazet } 272fddc17deSEric Dumazet 273fce82338SPavel Emelyanov struct sock *__udp6_lib_lookup(struct net *net, 27488440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 27588440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 276645ca708SEric Dumazet int dif, struct udp_table *udptable) 277645ca708SEric Dumazet { 278271b72c7SEric Dumazet struct sock *sk, *result; 27988ab1932SEric Dumazet struct hlist_nulls_node *node; 280645ca708SEric Dumazet unsigned short hnum = ntohs(dport); 281fddc17deSEric Dumazet unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); 282fddc17deSEric Dumazet struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; 28372289b96STom Herbert int score, badness, matches = 0, reuseport = 0; 28472289b96STom Herbert u32 hash = 0; 285645ca708SEric Dumazet 286271b72c7SEric Dumazet rcu_read_lock(); 287fddc17deSEric Dumazet if (hslot->count > 10) { 288fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, daddr, hnum); 289fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 290fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 291fddc17deSEric Dumazet if (hslot->count < hslot2->count) 292fddc17deSEric Dumazet goto begin; 293fddc17deSEric Dumazet 294fddc17deSEric Dumazet result = udp6_lib_lookup2(net, saddr, sport, 295fddc17deSEric Dumazet daddr, hnum, dif, 296fddc17deSEric Dumazet hslot2, slot2); 297fddc17deSEric Dumazet if (!result) { 298fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); 299fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 300fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 301fddc17deSEric Dumazet if (hslot->count < hslot2->count) 302fddc17deSEric Dumazet goto begin; 303fddc17deSEric Dumazet 3041223c67cSJorge Boncompte [DTI2] result = udp6_lib_lookup2(net, saddr, sport, 3051223c67cSJorge Boncompte [DTI2] &in6addr_any, hnum, dif, 306fddc17deSEric Dumazet hslot2, slot2); 307fddc17deSEric Dumazet } 308fddc17deSEric Dumazet rcu_read_unlock(); 309fddc17deSEric Dumazet return result; 310fddc17deSEric Dumazet } 311271b72c7SEric Dumazet begin: 312271b72c7SEric Dumazet result = NULL; 313271b72c7SEric Dumazet badness = -1; 31488ab1932SEric Dumazet sk_nulls_for_each_rcu(sk, node, &hslot->head) { 315645ca708SEric Dumazet score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); 316645ca708SEric Dumazet if (score > badness) { 317db8dac20SDavid S. Miller result = sk; 318db8dac20SDavid S. Miller badness = score; 31972289b96STom Herbert reuseport = sk->sk_reuseport; 32072289b96STom Herbert if (reuseport) { 321b50026b5SHannes Frederic Sowa hash = udp6_ehashfn(net, daddr, hnum, 32272289b96STom Herbert saddr, sport); 32372289b96STom Herbert matches = 1; 32472289b96STom Herbert } 32572289b96STom Herbert } else if (score == badness && reuseport) { 32672289b96STom Herbert matches++; 32772289b96STom Herbert if (((u64)hash * matches) >> 32 == 0) 32872289b96STom Herbert result = sk; 32972289b96STom Herbert hash = next_pseudo_random32(hash); 330db8dac20SDavid S. Miller } 331db8dac20SDavid S. Miller } 33288ab1932SEric Dumazet /* 33388ab1932SEric Dumazet * if the nulls value we got at the end of this lookup is 33488ab1932SEric Dumazet * not the expected one, we must restart lookup. 33588ab1932SEric Dumazet * We probably met an item that was moved to another chain. 33688ab1932SEric Dumazet */ 337fddc17deSEric Dumazet if (get_nulls_value(node) != slot) 33888ab1932SEric Dumazet goto begin; 33988ab1932SEric Dumazet 340271b72c7SEric Dumazet if (result) { 341c31504dcSEric Dumazet if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) 342271b72c7SEric Dumazet result = NULL; 343271b72c7SEric Dumazet else if (unlikely(compute_score(result, net, hnum, saddr, sport, 344271b72c7SEric Dumazet daddr, dport, dif) < badness)) { 345271b72c7SEric Dumazet sock_put(result); 346271b72c7SEric Dumazet goto begin; 347271b72c7SEric Dumazet } 348271b72c7SEric Dumazet } 349271b72c7SEric Dumazet rcu_read_unlock(); 350db8dac20SDavid S. Miller return result; 351db8dac20SDavid S. Miller } 352fce82338SPavel Emelyanov EXPORT_SYMBOL_GPL(__udp6_lib_lookup); 353db8dac20SDavid S. Miller 354607c4aafSKOVACS Krisztian static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, 355607c4aafSKOVACS Krisztian __be16 sport, __be16 dport, 356645ca708SEric Dumazet struct udp_table *udptable) 357607c4aafSKOVACS Krisztian { 35823542618SKOVACS Krisztian struct sock *sk; 359b71d1d42SEric Dumazet const struct ipv6hdr *iph = ipv6_hdr(skb); 360607c4aafSKOVACS Krisztian 36123542618SKOVACS Krisztian if (unlikely(sk = skb_steal_sock(skb))) 36223542618SKOVACS Krisztian return sk; 363adf30907SEric Dumazet return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, 364607c4aafSKOVACS Krisztian &iph->daddr, dport, inet6_iif(skb), 365607c4aafSKOVACS Krisztian udptable); 366607c4aafSKOVACS Krisztian } 367607c4aafSKOVACS Krisztian 368aa976fc0SBalazs Scheidler struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, 369aa976fc0SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, int dif) 370aa976fc0SBalazs Scheidler { 371aa976fc0SBalazs Scheidler return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); 372aa976fc0SBalazs Scheidler } 373aa976fc0SBalazs Scheidler EXPORT_SYMBOL_GPL(udp6_lib_lookup); 374aa976fc0SBalazs Scheidler 375aa976fc0SBalazs Scheidler 376db8dac20SDavid S. Miller /* 377db8dac20SDavid S. Miller * This should be easy, if there is something there we 378db8dac20SDavid S. Miller * return it, otherwise we block. 379db8dac20SDavid S. Miller */ 380db8dac20SDavid S. Miller 381db8dac20SDavid S. Miller int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, 382db8dac20SDavid S. Miller struct msghdr *msg, size_t len, 383db8dac20SDavid S. Miller int noblock, int flags, int *addr_len) 384db8dac20SDavid S. Miller { 385db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 386db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 387db8dac20SDavid S. Miller struct sk_buff *skb; 38859c2cdaeSDavid S. Miller unsigned int ulen, copied; 3893f518bf7SPavel Emelyanov int peeked, off = 0; 390db8dac20SDavid S. Miller int err; 391db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 392f26ba175SWei Yongjun int is_udp4; 3938a74ad60SEric Dumazet bool slow; 394db8dac20SDavid S. Miller 395db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 39685fbaa75SHannes Frederic Sowa return ipv6_recv_error(sk, msg, len, addr_len); 397db8dac20SDavid S. Miller 3984b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 39985fbaa75SHannes Frederic Sowa return ipv6_recv_rxpmtu(sk, msg, len, addr_len); 4004b340ae2SBrian Haley 401db8dac20SDavid S. Miller try_again: 402db8dac20SDavid S. Miller skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), 4033f518bf7SPavel Emelyanov &peeked, &off, &err); 404db8dac20SDavid S. Miller if (!skb) 405db8dac20SDavid S. Miller goto out; 406db8dac20SDavid S. Miller 407db8dac20SDavid S. Miller ulen = skb->len - sizeof(struct udphdr); 40859c2cdaeSDavid S. Miller copied = len; 40959c2cdaeSDavid S. Miller if (copied > ulen) 41059c2cdaeSDavid S. Miller copied = ulen; 41159c2cdaeSDavid S. Miller else if (copied < ulen) 412db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 413db8dac20SDavid S. Miller 414f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 415f26ba175SWei Yongjun 416db8dac20SDavid S. Miller /* 417db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 418db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 419db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 420db8dac20SDavid S. Miller */ 421db8dac20SDavid S. Miller 42259c2cdaeSDavid S. Miller if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { 423db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 424db8dac20SDavid S. Miller goto csum_copy_err; 425db8dac20SDavid S. Miller } 426db8dac20SDavid S. Miller 427db8dac20SDavid S. Miller if (skb_csum_unnecessary(skb)) 428db8dac20SDavid S. Miller err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), 42959c2cdaeSDavid S. Miller msg->msg_iov, copied); 430db8dac20SDavid S. Miller else { 431db8dac20SDavid S. Miller err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); 432db8dac20SDavid S. Miller if (err == -EINVAL) 433db8dac20SDavid S. Miller goto csum_copy_err; 434db8dac20SDavid S. Miller } 43522911fc5SEric Dumazet if (unlikely(err)) { 43622911fc5SEric Dumazet trace_kfree_skb(skb, udpv6_recvmsg); 437979402b1SEric Dumazet if (!peeked) { 438979402b1SEric Dumazet atomic_inc(&sk->sk_drops); 439979402b1SEric Dumazet if (is_udp4) 440979402b1SEric Dumazet UDP_INC_STATS_USER(sock_net(sk), 441979402b1SEric Dumazet UDP_MIB_INERRORS, 442979402b1SEric Dumazet is_udplite); 443979402b1SEric Dumazet else 444979402b1SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 445979402b1SEric Dumazet UDP_MIB_INERRORS, 446979402b1SEric Dumazet is_udplite); 447979402b1SEric Dumazet } 448db8dac20SDavid S. Miller goto out_free; 44922911fc5SEric Dumazet } 450f26ba175SWei Yongjun if (!peeked) { 451f26ba175SWei Yongjun if (is_udp4) 452f26ba175SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 453f26ba175SWei Yongjun UDP_MIB_INDATAGRAMS, is_udplite); 454f26ba175SWei Yongjun else 455235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 456235b9f7aSPavel Emelyanov UDP_MIB_INDATAGRAMS, is_udplite); 457f26ba175SWei Yongjun } 458db8dac20SDavid S. Miller 4593b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 460db8dac20SDavid S. Miller 461db8dac20SDavid S. Miller /* Copy the address. */ 462db8dac20SDavid S. Miller if (msg->msg_name) { 463342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 464db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 465db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 466db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 467db8dac20SDavid S. Miller 468842df073SHannes Frederic Sowa if (is_udp4) { 469b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 470b301e82cSBrian Haley &sin6->sin6_addr); 471842df073SHannes Frederic Sowa sin6->sin6_scope_id = 0; 472842df073SHannes Frederic Sowa } else { 4734e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr; 474842df073SHannes Frederic Sowa sin6->sin6_scope_id = 475842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin6->sin6_addr, 476842df073SHannes Frederic Sowa IP6CB(skb)->iif); 477db8dac20SDavid S. Miller } 478bceaa902SHannes Frederic Sowa *addr_len = sizeof(*sin6); 479db8dac20SDavid S. Miller } 4804b261c75SHannes Frederic Sowa 4814b261c75SHannes Frederic Sowa if (np->rxopt.all) 4824b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 4834b261c75SHannes Frederic Sowa 484f26ba175SWei Yongjun if (is_udp4) { 485db8dac20SDavid S. Miller if (inet->cmsg_flags) 486db8dac20SDavid S. Miller ip_cmsg_recv(msg, skb); 487db8dac20SDavid S. Miller } else { 488db8dac20SDavid S. Miller if (np->rxopt.all) 4894b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 490db8dac20SDavid S. Miller } 491db8dac20SDavid S. Miller 49259c2cdaeSDavid S. Miller err = copied; 493db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 494db8dac20SDavid S. Miller err = ulen; 495db8dac20SDavid S. Miller 496db8dac20SDavid S. Miller out_free: 4979d410c79SEric Dumazet skb_free_datagram_locked(sk, skb); 498db8dac20SDavid S. Miller out: 499db8dac20SDavid S. Miller return err; 500db8dac20SDavid S. Miller 501db8dac20SDavid S. Miller csum_copy_err: 5028a74ad60SEric Dumazet slow = lock_sock_fast(sk); 5030856f939SWei Yongjun if (!skb_kill_datagram(sk, skb, flags)) { 5046a5dc9e5SEric Dumazet if (is_udp4) { 5056a5dc9e5SEric Dumazet UDP_INC_STATS_USER(sock_net(sk), 5066a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 5070856f939SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 5080856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 5096a5dc9e5SEric Dumazet } else { 5106a5dc9e5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 5116a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 5120856f939SWei Yongjun UDP6_INC_STATS_USER(sock_net(sk), 5130856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 5140856f939SWei Yongjun } 5156a5dc9e5SEric Dumazet } 5168a74ad60SEric Dumazet unlock_sock_fast(sk, slow); 517db8dac20SDavid S. Miller 51832c90254SXufeng Zhang if (noblock) 519db8dac20SDavid S. Miller return -EAGAIN; 5209cfaa8deSXufeng Zhang 5219cfaa8deSXufeng Zhang /* starting over for a new packet */ 5229cfaa8deSXufeng Zhang msg->msg_flags &= ~MSG_TRUNC; 523db8dac20SDavid S. Miller goto try_again; 524db8dac20SDavid S. Miller } 525db8dac20SDavid S. Miller 526db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 527d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 528645ca708SEric Dumazet struct udp_table *udptable) 529db8dac20SDavid S. Miller { 530db8dac20SDavid S. Miller struct ipv6_pinfo *np; 531b71d1d42SEric Dumazet const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; 532b71d1d42SEric Dumazet const struct in6_addr *saddr = &hdr->saddr; 533b71d1d42SEric Dumazet const struct in6_addr *daddr = &hdr->daddr; 534db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr*)(skb->data+offset); 535db8dac20SDavid S. Miller struct sock *sk; 536db8dac20SDavid S. Miller int err; 537db8dac20SDavid S. Miller 538c346dca1SYOSHIFUJI Hideaki sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, 539db8dac20SDavid S. Miller saddr, uh->source, inet6_iif(skb), udptable); 540db8dac20SDavid S. Miller if (sk == NULL) 541db8dac20SDavid S. Miller return; 542db8dac20SDavid S. Miller 54393b36cf3SHannes Frederic Sowa if (type == ICMPV6_PKT_TOOBIG) { 54493b36cf3SHannes Frederic Sowa if (!ip6_sk_accept_pmtu(sk)) 54593b36cf3SHannes Frederic Sowa goto out; 54681aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info); 54793b36cf3SHannes Frederic Sowa } 5481a462d18SDuan Jiong if (type == NDISC_REDIRECT) { 549ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk); 5501a462d18SDuan Jiong goto out; 5511a462d18SDuan Jiong } 55281aded24SDavid S. Miller 553db8dac20SDavid S. Miller np = inet6_sk(sk); 554db8dac20SDavid S. Miller 555db8dac20SDavid S. Miller if (!icmpv6_err_convert(type, code, &err) && !np->recverr) 556db8dac20SDavid S. Miller goto out; 557db8dac20SDavid S. Miller 558db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) 559db8dac20SDavid S. Miller goto out; 560db8dac20SDavid S. Miller 561b1faf566SEric Dumazet if (np->recverr) 562db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 563b1faf566SEric Dumazet 564db8dac20SDavid S. Miller sk->sk_err = err; 565db8dac20SDavid S. Miller sk->sk_error_report(sk); 566db8dac20SDavid S. Miller out: 567db8dac20SDavid S. Miller sock_put(sk); 568db8dac20SDavid S. Miller } 569db8dac20SDavid S. Miller 570f7ad74feSBenjamin LaHaise static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 571f7ad74feSBenjamin LaHaise { 572f7ad74feSBenjamin LaHaise int rc; 573f7ad74feSBenjamin LaHaise 574efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 575f7ad74feSBenjamin LaHaise sock_rps_save_rxhash(sk, skb); 576005ec974SShawn Bohrer sk_mark_napi_id(sk, skb); 577005ec974SShawn Bohrer } 578f7ad74feSBenjamin LaHaise 579f7ad74feSBenjamin LaHaise rc = sock_queue_rcv_skb(sk, skb); 580f7ad74feSBenjamin LaHaise if (rc < 0) { 581f7ad74feSBenjamin LaHaise int is_udplite = IS_UDPLITE(sk); 582f7ad74feSBenjamin LaHaise 583f7ad74feSBenjamin LaHaise /* Note that an ENOMEM error is charged twice */ 584f7ad74feSBenjamin LaHaise if (rc == -ENOMEM) 585f7ad74feSBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), 586f7ad74feSBenjamin LaHaise UDP_MIB_RCVBUFERRORS, is_udplite); 587f7ad74feSBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 588f7ad74feSBenjamin LaHaise kfree_skb(skb); 589f7ad74feSBenjamin LaHaise return -1; 590f7ad74feSBenjamin LaHaise } 591f7ad74feSBenjamin LaHaise return 0; 592f7ad74feSBenjamin LaHaise } 593f7ad74feSBenjamin LaHaise 594db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 595d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 596d5fdd6baSBrian Haley u8 code, int offset, __be32 info ) 597db8dac20SDavid S. Miller { 598645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 599db8dac20SDavid S. Miller } 600db8dac20SDavid S. Miller 601d7f3f621SBenjamin LaHaise static struct static_key udpv6_encap_needed __read_mostly; 602d7f3f621SBenjamin LaHaise void udpv6_encap_enable(void) 603d7f3f621SBenjamin LaHaise { 604d7f3f621SBenjamin LaHaise if (!static_key_enabled(&udpv6_encap_needed)) 605d7f3f621SBenjamin LaHaise static_key_slow_inc(&udpv6_encap_needed); 606d7f3f621SBenjamin LaHaise } 607d7f3f621SBenjamin LaHaise EXPORT_SYMBOL(udpv6_encap_enable); 608d7f3f621SBenjamin LaHaise 609db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 610db8dac20SDavid S. Miller { 611db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 612db8dac20SDavid S. Miller int rc; 613db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 614db8dac20SDavid S. Miller 615db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 616db8dac20SDavid S. Miller goto drop; 617db8dac20SDavid S. Miller 618d7f3f621SBenjamin LaHaise if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 619d7f3f621SBenjamin LaHaise int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); 620d7f3f621SBenjamin LaHaise 621d7f3f621SBenjamin LaHaise /* 622d7f3f621SBenjamin LaHaise * This is an encapsulation socket so pass the skb to 623d7f3f621SBenjamin LaHaise * the socket's udp_encap_rcv() hook. Otherwise, just 624d7f3f621SBenjamin LaHaise * fall through and pass this up the UDP socket. 625d7f3f621SBenjamin LaHaise * up->encap_rcv() returns the following value: 626d7f3f621SBenjamin LaHaise * =0 if skb was successfully passed to the encap 627d7f3f621SBenjamin LaHaise * handler or was discarded by it. 628d7f3f621SBenjamin LaHaise * >0 if skb should be passed on to UDP. 629d7f3f621SBenjamin LaHaise * <0 if skb should be resubmitted as proto -N 630d7f3f621SBenjamin LaHaise */ 631d7f3f621SBenjamin LaHaise 632d7f3f621SBenjamin LaHaise /* if we're overly short, let UDP handle it */ 633d7f3f621SBenjamin LaHaise encap_rcv = ACCESS_ONCE(up->encap_rcv); 634d7f3f621SBenjamin LaHaise if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) { 635d7f3f621SBenjamin LaHaise int ret; 636d7f3f621SBenjamin LaHaise 637d7f3f621SBenjamin LaHaise ret = encap_rcv(sk, skb); 638d7f3f621SBenjamin LaHaise if (ret <= 0) { 639d7f3f621SBenjamin LaHaise UDP_INC_STATS_BH(sock_net(sk), 640d7f3f621SBenjamin LaHaise UDP_MIB_INDATAGRAMS, 641d7f3f621SBenjamin LaHaise is_udplite); 642d7f3f621SBenjamin LaHaise return -ret; 643d7f3f621SBenjamin LaHaise } 644d7f3f621SBenjamin LaHaise } 645d7f3f621SBenjamin LaHaise 646d7f3f621SBenjamin LaHaise /* FALLTHROUGH -- it's a UDP Packet */ 647d7f3f621SBenjamin LaHaise } 648d7f3f621SBenjamin LaHaise 649db8dac20SDavid S. Miller /* 650db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 651db8dac20SDavid S. Miller */ 652db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 653db8dac20SDavid S. Miller 654db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 655db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" 656db8dac20SDavid S. Miller " %d while full coverage %d requested\n", 657db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 658db8dac20SDavid S. Miller goto drop; 659db8dac20SDavid S. Miller } 660db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 661db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " 662db8dac20SDavid S. Miller "too small, need min %d\n", 663db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 664db8dac20SDavid S. Miller goto drop; 665db8dac20SDavid S. Miller } 666db8dac20SDavid S. Miller } 667db8dac20SDavid S. Miller 66833d480ceSEric Dumazet if (rcu_access_pointer(sk->sk_filter)) { 669db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 6706a5dc9e5SEric Dumazet goto csum_error; 671db8dac20SDavid S. Miller } 672db8dac20SDavid S. Miller 673cb80ef46SBenjamin LaHaise if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) 674cb80ef46SBenjamin LaHaise goto drop; 675cb80ef46SBenjamin LaHaise 676d826eb14SEric Dumazet skb_dst_drop(skb); 677db8dac20SDavid S. Miller 678cb80ef46SBenjamin LaHaise bh_lock_sock(sk); 679cb80ef46SBenjamin LaHaise rc = 0; 680cb80ef46SBenjamin LaHaise if (!sock_owned_by_user(sk)) 681f7ad74feSBenjamin LaHaise rc = __udpv6_queue_rcv_skb(sk, skb); 682cb80ef46SBenjamin LaHaise else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { 683cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 684cb80ef46SBenjamin LaHaise goto drop; 685cb80ef46SBenjamin LaHaise } 686cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 687f7ad74feSBenjamin LaHaise 688f7ad74feSBenjamin LaHaise return rc; 6896a5dc9e5SEric Dumazet csum_error: 6906a5dc9e5SEric Dumazet UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); 691db8dac20SDavid S. Miller drop: 692ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 693cb80ef46SBenjamin LaHaise atomic_inc(&sk->sk_drops); 694db8dac20SDavid S. Miller kfree_skb(skb); 695db8dac20SDavid S. Miller return -1; 696db8dac20SDavid S. Miller } 697db8dac20SDavid S. Miller 698920a4611SEric Dumazet static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, 699b71d1d42SEric Dumazet __be16 loc_port, const struct in6_addr *loc_addr, 700b71d1d42SEric Dumazet __be16 rmt_port, const struct in6_addr *rmt_addr, 701db8dac20SDavid S. Miller int dif) 702db8dac20SDavid S. Miller { 70388ab1932SEric Dumazet struct hlist_nulls_node *node; 704db8dac20SDavid S. Miller struct sock *s = sk; 705db8dac20SDavid S. Miller unsigned short num = ntohs(loc_port); 706db8dac20SDavid S. Miller 70788ab1932SEric Dumazet sk_nulls_for_each_from(s, node) { 708db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(s); 709db8dac20SDavid S. Miller 710920a4611SEric Dumazet if (!net_eq(sock_net(s), net)) 711b8ad0cbcSDaniel Lezcano continue; 712b8ad0cbcSDaniel Lezcano 713d4cada4aSEric Dumazet if (udp_sk(s)->udp_port_hash == num && 714d4cada4aSEric Dumazet s->sk_family == PF_INET6) { 715c720c7e8SEric Dumazet if (inet->inet_dport) { 716c720c7e8SEric Dumazet if (inet->inet_dport != rmt_port) 717db8dac20SDavid S. Miller continue; 718db8dac20SDavid S. Miller } 719efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr) && 720efe4208fSEric Dumazet !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) 721db8dac20SDavid S. Miller continue; 722db8dac20SDavid S. Miller 723db8dac20SDavid S. Miller if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) 724db8dac20SDavid S. Miller continue; 725db8dac20SDavid S. Miller 726efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { 727efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr)) 728db8dac20SDavid S. Miller continue; 729db8dac20SDavid S. Miller } 730db8dac20SDavid S. Miller if (!inet6_mc_check(s, loc_addr, rmt_addr)) 731db8dac20SDavid S. Miller continue; 732db8dac20SDavid S. Miller return s; 733db8dac20SDavid S. Miller } 734db8dac20SDavid S. Miller } 735db8dac20SDavid S. Miller return NULL; 736db8dac20SDavid S. Miller } 737db8dac20SDavid S. Miller 738a1ab77f9SEric Dumazet static void flush_stack(struct sock **stack, unsigned int count, 739a1ab77f9SEric Dumazet struct sk_buff *skb, unsigned int final) 740a1ab77f9SEric Dumazet { 741cb80ef46SBenjamin LaHaise struct sk_buff *skb1 = NULL; 742a1ab77f9SEric Dumazet struct sock *sk; 743cb80ef46SBenjamin LaHaise unsigned int i; 744a1ab77f9SEric Dumazet 745a1ab77f9SEric Dumazet for (i = 0; i < count; i++) { 746a1ab77f9SEric Dumazet sk = stack[i]; 747cb80ef46SBenjamin LaHaise if (likely(skb1 == NULL)) 748cb80ef46SBenjamin LaHaise skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); 749cb80ef46SBenjamin LaHaise if (!skb1) { 750f6b8f32cSEric Dumazet atomic_inc(&sk->sk_drops); 751cb80ef46SBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS, 752cb80ef46SBenjamin LaHaise IS_UDPLITE(sk)); 753cb80ef46SBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, 754cb80ef46SBenjamin LaHaise IS_UDPLITE(sk)); 755a1ab77f9SEric Dumazet } 756cb80ef46SBenjamin LaHaise 757cb80ef46SBenjamin LaHaise if (skb1 && udpv6_queue_rcv_skb(sk, skb1) <= 0) 758cb80ef46SBenjamin LaHaise skb1 = NULL; 759cb80ef46SBenjamin LaHaise } 760cb80ef46SBenjamin LaHaise if (unlikely(skb1)) 761cb80ef46SBenjamin LaHaise kfree_skb(skb1); 762a1ab77f9SEric Dumazet } 763db8dac20SDavid S. Miller /* 764db8dac20SDavid S. Miller * Note: called only from the BH handler context, 765db8dac20SDavid S. Miller * so we don't need to lock the hashes. 766db8dac20SDavid S. Miller */ 767e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 768b71d1d42SEric Dumazet const struct in6_addr *saddr, const struct in6_addr *daddr, 769645ca708SEric Dumazet struct udp_table *udptable) 770db8dac20SDavid S. Miller { 771a1ab77f9SEric Dumazet struct sock *sk, *stack[256 / sizeof(struct sock *)]; 772db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 773f86dcc5aSEric Dumazet struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); 774db8dac20SDavid S. Miller int dif; 775a1ab77f9SEric Dumazet unsigned int i, count = 0; 776db8dac20SDavid S. Miller 777645ca708SEric Dumazet spin_lock(&hslot->lock); 77888ab1932SEric Dumazet sk = sk_nulls_head(&hslot->head); 779db8dac20SDavid S. Miller dif = inet6_iif(skb); 780920a4611SEric Dumazet sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); 781a1ab77f9SEric Dumazet while (sk) { 782a1ab77f9SEric Dumazet stack[count++] = sk; 783a1ab77f9SEric Dumazet sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, 784a1ab77f9SEric Dumazet uh->source, saddr, dif); 785a1ab77f9SEric Dumazet if (unlikely(count == ARRAY_SIZE(stack))) { 786a1ab77f9SEric Dumazet if (!sk) 787a1ab77f9SEric Dumazet break; 788a1ab77f9SEric Dumazet flush_stack(stack, count, skb, ~0); 789a1ab77f9SEric Dumazet count = 0; 790db8dac20SDavid S. Miller } 791a1ab77f9SEric Dumazet } 792a1ab77f9SEric Dumazet /* 793a1ab77f9SEric Dumazet * before releasing the lock, we must take reference on sockets 794a1ab77f9SEric Dumazet */ 795a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 796a1ab77f9SEric Dumazet sock_hold(stack[i]); 797db8dac20SDavid S. Miller 798645ca708SEric Dumazet spin_unlock(&hslot->lock); 799a1ab77f9SEric Dumazet 800a1ab77f9SEric Dumazet if (count) { 801a1ab77f9SEric Dumazet flush_stack(stack, count, skb, count - 1); 802a1ab77f9SEric Dumazet 803a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 804a1ab77f9SEric Dumazet sock_put(stack[i]); 805a1ab77f9SEric Dumazet } else { 806a1ab77f9SEric Dumazet kfree_skb(skb); 807a1ab77f9SEric Dumazet } 808db8dac20SDavid S. Miller return 0; 809db8dac20SDavid S. Miller } 810db8dac20SDavid S. Miller 811645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 812db8dac20SDavid S. Miller int proto) 813db8dac20SDavid S. Miller { 8143ffe533cSAlexey Dobriyan struct net *net = dev_net(skb->dev); 815db8dac20SDavid S. Miller struct sock *sk; 816db8dac20SDavid S. Miller struct udphdr *uh; 817b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 818db8dac20SDavid S. Miller u32 ulen = 0; 819db8dac20SDavid S. Miller 820db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 821d6bc0149SBjørn Mork goto discard; 822db8dac20SDavid S. Miller 823db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 824db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 825db8dac20SDavid S. Miller uh = udp_hdr(skb); 826db8dac20SDavid S. Miller 827db8dac20SDavid S. Miller ulen = ntohs(uh->len); 828db8dac20SDavid S. Miller if (ulen > skb->len) 829db8dac20SDavid S. Miller goto short_packet; 830db8dac20SDavid S. Miller 831db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 832db8dac20SDavid S. Miller /* UDP validates ulen. */ 833db8dac20SDavid S. Miller 834db8dac20SDavid S. Miller /* Check for jumbo payload */ 835db8dac20SDavid S. Miller if (ulen == 0) 836db8dac20SDavid S. Miller ulen = skb->len; 837db8dac20SDavid S. Miller 838db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 839db8dac20SDavid S. Miller goto short_packet; 840db8dac20SDavid S. Miller 841db8dac20SDavid S. Miller if (ulen < skb->len) { 842db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 843db8dac20SDavid S. Miller goto short_packet; 844db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 845db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 846db8dac20SDavid S. Miller uh = udp_hdr(skb); 847db8dac20SDavid S. Miller } 848db8dac20SDavid S. Miller } 849db8dac20SDavid S. Miller 850db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 8516a5dc9e5SEric Dumazet goto csum_error; 852db8dac20SDavid S. Miller 853db8dac20SDavid S. Miller /* 854db8dac20SDavid S. Miller * Multicast receive code 855db8dac20SDavid S. Miller */ 856db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 857e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 858e3163493SPavel Emelyanov saddr, daddr, udptable); 859db8dac20SDavid S. Miller 860db8dac20SDavid S. Miller /* Unicast */ 861db8dac20SDavid S. Miller 862db8dac20SDavid S. Miller /* 863db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 864db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 865db8dac20SDavid S. Miller */ 866607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 867cb80ef46SBenjamin LaHaise if (sk != NULL) { 868a5b50476SEliezer Tamir int ret; 869a5b50476SEliezer Tamir 870a5b50476SEliezer Tamir ret = udpv6_queue_rcv_skb(sk, skb); 871cb80ef46SBenjamin LaHaise sock_put(sk); 872db8dac20SDavid S. Miller 873cb80ef46SBenjamin LaHaise /* a return value > 0 means to resubmit the input, but 874cb80ef46SBenjamin LaHaise * it wants the return to be -protocol, or 0 875cb80ef46SBenjamin LaHaise */ 876cb80ef46SBenjamin LaHaise if (ret > 0) 877cb80ef46SBenjamin LaHaise return -ret; 878cb80ef46SBenjamin LaHaise 879cb80ef46SBenjamin LaHaise return 0; 880cb80ef46SBenjamin LaHaise } 881cb80ef46SBenjamin LaHaise 882db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 883db8dac20SDavid S. Miller goto discard; 884db8dac20SDavid S. Miller 885db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 8866a5dc9e5SEric Dumazet goto csum_error; 887db8dac20SDavid S. Miller 888cb80ef46SBenjamin LaHaise UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); 8893ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 890db8dac20SDavid S. Miller 891db8dac20SDavid S. Miller kfree_skb(skb); 892db8dac20SDavid S. Miller return 0; 893db8dac20SDavid S. Miller 894db8dac20SDavid S. Miller short_packet: 895d6bc0149SBjørn Mork LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 896db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 897d6bc0149SBjørn Mork saddr, 898d6bc0149SBjørn Mork ntohs(uh->source), 899d6bc0149SBjørn Mork ulen, 900d6bc0149SBjørn Mork skb->len, 901d6bc0149SBjørn Mork daddr, 902d6bc0149SBjørn Mork ntohs(uh->dest)); 9036a5dc9e5SEric Dumazet goto discard; 9046a5dc9e5SEric Dumazet csum_error: 9056a5dc9e5SEric Dumazet UDP6_INC_STATS_BH(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); 906db8dac20SDavid S. Miller discard: 907ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 908db8dac20SDavid S. Miller kfree_skb(skb); 909db8dac20SDavid S. Miller return 0; 910db8dac20SDavid S. Miller } 911db8dac20SDavid S. Miller 912db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 913db8dac20SDavid S. Miller { 914645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 915db8dac20SDavid S. Miller } 916db8dac20SDavid S. Miller 917db8dac20SDavid S. Miller /* 918db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 919db8dac20SDavid S. Miller */ 920db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 921db8dac20SDavid S. Miller { 922db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 923db8dac20SDavid S. Miller 92436d926b9SDenis V. Lunev if (up->pending == AF_INET) 92536d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 92636d926b9SDenis V. Lunev else if (up->pending) { 927db8dac20SDavid S. Miller up->len = 0; 928db8dac20SDavid S. Miller up->pending = 0; 929db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 930db8dac20SDavid S. Miller } 931db8dac20SDavid S. Miller } 932db8dac20SDavid S. Miller 933493c6be3SSridhar Samudrala /** 934493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 935493c6be3SSridhar Samudrala * @sk: socket we are sending on 936493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 937493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 938493c6be3SSridhar Samudrala */ 939493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 940493c6be3SSridhar Samudrala const struct in6_addr *saddr, 941493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 942493c6be3SSridhar Samudrala { 943493c6be3SSridhar Samudrala unsigned int offset; 944493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 945493c6be3SSridhar Samudrala __wsum csum = 0; 946493c6be3SSridhar Samudrala 947493c6be3SSridhar Samudrala if (skb_queue_len(&sk->sk_write_queue) == 1) { 948493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 949493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 950493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 951493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 952493c6be3SSridhar Samudrala } else { 953493c6be3SSridhar Samudrala /* 954493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 955493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 956493c6be3SSridhar Samudrala * should be together 957493c6be3SSridhar Samudrala */ 958493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 959493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 960493c6be3SSridhar Samudrala 961493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 962493c6be3SSridhar Samudrala 963493c6be3SSridhar Samudrala skb_queue_walk(&sk->sk_write_queue, skb) { 964493c6be3SSridhar Samudrala csum = csum_add(csum, skb->csum); 965493c6be3SSridhar Samudrala } 966493c6be3SSridhar Samudrala 967493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 968493c6be3SSridhar Samudrala csum); 969493c6be3SSridhar Samudrala if (uh->check == 0) 970493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 971493c6be3SSridhar Samudrala } 972493c6be3SSridhar Samudrala } 973493c6be3SSridhar Samudrala 974db8dac20SDavid S. Miller /* 975db8dac20SDavid S. Miller * Sending 976db8dac20SDavid S. Miller */ 977db8dac20SDavid S. Miller 978db8dac20SDavid S. Miller static int udp_v6_push_pending_frames(struct sock *sk) 979db8dac20SDavid S. Miller { 980db8dac20SDavid S. Miller struct sk_buff *skb; 981db8dac20SDavid S. Miller struct udphdr *uh; 982db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 983db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 9848822b64aSHannes Frederic Sowa struct flowi6 *fl6; 985db8dac20SDavid S. Miller int err = 0; 986db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 987db8dac20SDavid S. Miller __wsum csum = 0; 988db8dac20SDavid S. Miller 9898822b64aSHannes Frederic Sowa if (up->pending == AF_INET) 9908822b64aSHannes Frederic Sowa return udp_push_pending_frames(sk); 9918822b64aSHannes Frederic Sowa 9928822b64aSHannes Frederic Sowa fl6 = &inet->cork.fl.u.ip6; 9938822b64aSHannes Frederic Sowa 994db8dac20SDavid S. Miller /* Grab the skbuff where UDP header space exists. */ 995db8dac20SDavid S. Miller if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 996db8dac20SDavid S. Miller goto out; 997db8dac20SDavid S. Miller 998db8dac20SDavid S. Miller /* 999db8dac20SDavid S. Miller * Create a UDP header 1000db8dac20SDavid S. Miller */ 1001db8dac20SDavid S. Miller uh = udp_hdr(skb); 10021958b856SDavid S. Miller uh->source = fl6->fl6_sport; 10031958b856SDavid S. Miller uh->dest = fl6->fl6_dport; 1004db8dac20SDavid S. Miller uh->len = htons(up->len); 1005db8dac20SDavid S. Miller uh->check = 0; 1006db8dac20SDavid S. Miller 1007db8dac20SDavid S. Miller if (is_udplite) 1008db8dac20SDavid S. Miller csum = udplite_csum_outgoing(sk, skb); 1009493c6be3SSridhar Samudrala else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 10104c9483b2SDavid S. Miller udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, 1011493c6be3SSridhar Samudrala up->len); 1012493c6be3SSridhar Samudrala goto send; 1013493c6be3SSridhar Samudrala } else 1014db8dac20SDavid S. Miller csum = udp_csum_outgoing(sk, skb); 1015db8dac20SDavid S. Miller 1016db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 10174c9483b2SDavid S. Miller uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 10184c9483b2SDavid S. Miller up->len, fl6->flowi6_proto, csum); 1019db8dac20SDavid S. Miller if (uh->check == 0) 1020db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 1021db8dac20SDavid S. Miller 1022493c6be3SSridhar Samudrala send: 1023db8dac20SDavid S. Miller err = ip6_push_pending_frames(sk); 10246ce9e7b5SEric Dumazet if (err) { 10256ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 10266ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 10276ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 10286ce9e7b5SEric Dumazet err = 0; 10296ce9e7b5SEric Dumazet } 10306ce9e7b5SEric Dumazet } else 10316ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 10326ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 1033db8dac20SDavid S. Miller out: 1034db8dac20SDavid S. Miller up->len = 0; 1035db8dac20SDavid S. Miller up->pending = 0; 1036db8dac20SDavid S. Miller return err; 1037db8dac20SDavid S. Miller } 1038db8dac20SDavid S. Miller 1039db8dac20SDavid S. Miller int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, 1040db8dac20SDavid S. Miller struct msghdr *msg, size_t len) 1041db8dac20SDavid S. Miller { 1042db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 1043db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 1044db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 1045db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 1046342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 104720c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 1048db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 1049db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 10504c9483b2SDavid S. Miller struct flowi6 fl6; 1051db8dac20SDavid S. Miller struct dst_entry *dst; 1052db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 1053db8dac20SDavid S. Miller int ulen = len; 1054db8dac20SDavid S. Miller int hlimit = -1; 1055db8dac20SDavid S. Miller int tclass = -1; 105613b52cd4SBrian Haley int dontfrag = -1; 1057db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 1058db8dac20SDavid S. Miller int err; 1059db8dac20SDavid S. Miller int connected = 0; 1060db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 1061db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 1062db8dac20SDavid S. Miller 1063db8dac20SDavid S. Miller /* destination address check */ 1064db8dac20SDavid S. Miller if (sin6) { 1065db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 1066db8dac20SDavid S. Miller return -EINVAL; 1067db8dac20SDavid S. Miller 1068db8dac20SDavid S. Miller switch (sin6->sin6_family) { 1069db8dac20SDavid S. Miller case AF_INET6: 1070db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 1071db8dac20SDavid S. Miller return -EINVAL; 1072db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1073db8dac20SDavid S. Miller break; 1074db8dac20SDavid S. Miller case AF_INET: 1075db8dac20SDavid S. Miller goto do_udp_sendmsg; 1076db8dac20SDavid S. Miller case AF_UNSPEC: 1077db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 1078db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 1079db8dac20SDavid S. Miller daddr = NULL; 1080db8dac20SDavid S. Miller break; 1081db8dac20SDavid S. Miller default: 1082db8dac20SDavid S. Miller return -EINVAL; 1083db8dac20SDavid S. Miller } 1084db8dac20SDavid S. Miller } else if (!up->pending) { 1085db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1086db8dac20SDavid S. Miller return -EDESTADDRREQ; 1087efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1088db8dac20SDavid S. Miller } else 1089db8dac20SDavid S. Miller daddr = NULL; 1090db8dac20SDavid S. Miller 1091db8dac20SDavid S. Miller if (daddr) { 1092db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 1093db8dac20SDavid S. Miller struct sockaddr_in sin; 1094db8dac20SDavid S. Miller sin.sin_family = AF_INET; 1095c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 1096db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1097db8dac20SDavid S. Miller msg->msg_name = &sin; 1098db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 1099db8dac20SDavid S. Miller do_udp_sendmsg: 1100db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 1101db8dac20SDavid S. Miller return -ENETUNREACH; 1102db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1103db8dac20SDavid S. Miller } 1104db8dac20SDavid S. Miller } 1105db8dac20SDavid S. Miller 1106db8dac20SDavid S. Miller if (up->pending == AF_INET) 1107db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1108db8dac20SDavid S. Miller 1109db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1110db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1111db8dac20SDavid S. Miller */ 1112db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1113db8dac20SDavid S. Miller return -EMSGSIZE; 1114db8dac20SDavid S. Miller 1115db8dac20SDavid S. Miller if (up->pending) { 1116db8dac20SDavid S. Miller /* 1117db8dac20SDavid S. Miller * There are pending frames. 1118db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1119db8dac20SDavid S. Miller */ 1120db8dac20SDavid S. Miller lock_sock(sk); 1121db8dac20SDavid S. Miller if (likely(up->pending)) { 1122db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1123db8dac20SDavid S. Miller release_sock(sk); 1124db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1125db8dac20SDavid S. Miller } 1126db8dac20SDavid S. Miller dst = NULL; 1127db8dac20SDavid S. Miller goto do_append_data; 1128db8dac20SDavid S. Miller } 1129db8dac20SDavid S. Miller release_sock(sk); 1130db8dac20SDavid S. Miller } 1131db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1132db8dac20SDavid S. Miller 11334c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 1134db8dac20SDavid S. Miller 1135db8dac20SDavid S. Miller if (sin6) { 1136db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1137db8dac20SDavid S. Miller return -EINVAL; 1138db8dac20SDavid S. Miller 11391958b856SDavid S. Miller fl6.fl6_dport = sin6->sin6_port; 1140db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1141db8dac20SDavid S. Miller 1142db8dac20SDavid S. Miller if (np->sndflow) { 11434c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 11444c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 11454c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1146db8dac20SDavid S. Miller if (flowlabel == NULL) 1147db8dac20SDavid S. Miller return -EINVAL; 1148db8dac20SDavid S. Miller } 1149db8dac20SDavid S. Miller } 1150db8dac20SDavid S. Miller 1151db8dac20SDavid S. Miller /* 1152db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1153db8dac20SDavid S. Miller * sk->sk_dst_cache. 1154db8dac20SDavid S. Miller */ 1155db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1156efe4208fSEric Dumazet ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) 1157efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1158db8dac20SDavid S. Miller 1159db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1160db8dac20SDavid S. Miller sin6->sin6_scope_id && 1161842df073SHannes Frederic Sowa __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) 11624c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 1163db8dac20SDavid S. Miller } else { 1164db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1165db8dac20SDavid S. Miller return -EDESTADDRREQ; 1166db8dac20SDavid S. Miller 11671958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 1168efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 11694c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 1170db8dac20SDavid S. Miller connected = 1; 1171db8dac20SDavid S. Miller } 1172db8dac20SDavid S. Miller 11734c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11744c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 1175db8dac20SDavid S. Miller 11764c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11774c9483b2SDavid S. Miller fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 11789f690db7SYang Hongyang 11794c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 118051953d5bSBrian Haley 1181db8dac20SDavid S. Miller if (msg->msg_controllen) { 1182db8dac20SDavid S. Miller opt = &opt_space; 1183db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1184db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 1185db8dac20SDavid S. Miller 118673df66f8STom Parkin err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, 1187ec0506dbSMaciej Żenczykowski &hlimit, &tclass, &dontfrag); 1188db8dac20SDavid S. Miller if (err < 0) { 1189db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1190db8dac20SDavid S. Miller return err; 1191db8dac20SDavid S. Miller } 11924c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 11934c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1194db8dac20SDavid S. Miller if (flowlabel == NULL) 1195db8dac20SDavid S. Miller return -EINVAL; 1196db8dac20SDavid S. Miller } 1197db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1198db8dac20SDavid S. Miller opt = NULL; 1199db8dac20SDavid S. Miller connected = 0; 1200db8dac20SDavid S. Miller } 1201db8dac20SDavid S. Miller if (opt == NULL) 1202db8dac20SDavid S. Miller opt = np->opt; 1203db8dac20SDavid S. Miller if (flowlabel) 1204db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1205db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 1206db8dac20SDavid S. Miller 12074c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 1208876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 12094e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr; 1210876c7f41SBrian Haley else 12114c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 12124c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 12134e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 12141958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 1215db8dac20SDavid S. Miller 12164c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 121720c59de2SArnaud Ebalard if (final_p) 1218db8dac20SDavid S. Miller connected = 0; 1219db8dac20SDavid S. Miller 12204c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { 12214c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 1222db8dac20SDavid S. Miller connected = 0; 1223c4062dfcSErich E. Hoover } else if (!fl6.flowi6_oif) 1224c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif; 1225db8dac20SDavid S. Miller 12264c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 1227db8dac20SDavid S. Miller 12280e0d44abSSteffen Klassert dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p); 122968d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 123068d0c6d3SDavid S. Miller err = PTR_ERR(dst); 123168d0c6d3SDavid S. Miller dst = NULL; 1232db8dac20SDavid S. Miller goto out; 1233db8dac20SDavid S. Miller } 1234db8dac20SDavid S. Miller 1235db8dac20SDavid S. Miller if (hlimit < 0) 12365c98631cSLorenzo Colitti hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); 1237db8dac20SDavid S. Miller 1238db8dac20SDavid S. Miller if (tclass < 0) 1239e651f03aSGerrit Renker tclass = np->tclass; 1240db8dac20SDavid S. Miller 1241db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1242db8dac20SDavid S. Miller goto do_confirm; 1243db8dac20SDavid S. Miller back_from_confirm: 1244db8dac20SDavid S. Miller 1245db8dac20SDavid S. Miller lock_sock(sk); 1246db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1247db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1248db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1249db8dac20SDavid S. Miller release_sock(sk); 1250db8dac20SDavid S. Miller 1251db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); 1252db8dac20SDavid S. Miller err = -EINVAL; 1253db8dac20SDavid S. Miller goto out; 1254db8dac20SDavid S. Miller } 1255db8dac20SDavid S. Miller 1256db8dac20SDavid S. Miller up->pending = AF_INET6; 1257db8dac20SDavid S. Miller 1258db8dac20SDavid S. Miller do_append_data: 1259e36d3ff9SJiri Pirko if (dontfrag < 0) 1260e36d3ff9SJiri Pirko dontfrag = np->dontfrag; 1261db8dac20SDavid S. Miller up->len += ulen; 1262db8dac20SDavid S. Miller getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1263db8dac20SDavid S. Miller err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, 12644c9483b2SDavid S. Miller sizeof(struct udphdr), hlimit, tclass, opt, &fl6, 1265db8dac20SDavid S. Miller (struct rt6_info*)dst, 126613b52cd4SBrian Haley corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); 1267db8dac20SDavid S. Miller if (err) 1268db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1269db8dac20SDavid S. Miller else if (!corkreq) 1270db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1271db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1272db8dac20SDavid S. Miller up->pending = 0; 1273db8dac20SDavid S. Miller 1274db8dac20SDavid S. Miller if (dst) { 1275db8dac20SDavid S. Miller if (connected) { 1276db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 1277efe4208fSEric Dumazet ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? 1278efe4208fSEric Dumazet &sk->sk_v6_daddr : NULL, 1279db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 12804c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1281db8dac20SDavid S. Miller &np->saddr : 1282db8dac20SDavid S. Miller #endif 1283db8dac20SDavid S. Miller NULL); 1284db8dac20SDavid S. Miller } else { 1285db8dac20SDavid S. Miller dst_release(dst); 1286db8dac20SDavid S. Miller } 1287a3c96089SYOSHIFUJI Hideaki dst = NULL; 1288db8dac20SDavid S. Miller } 1289db8dac20SDavid S. Miller 1290db8dac20SDavid S. Miller if (err > 0) 1291db8dac20SDavid S. Miller err = np->recverr ? net_xmit_errno(err) : 0; 1292db8dac20SDavid S. Miller release_sock(sk); 1293db8dac20SDavid S. Miller out: 1294a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1295db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1296db8dac20SDavid S. Miller if (!err) 1297db8dac20SDavid S. Miller return len; 1298db8dac20SDavid S. Miller /* 1299db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1300db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1301db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1302db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1303db8dac20SDavid S. Miller * seems like overkill. 1304db8dac20SDavid S. Miller */ 1305db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 1306235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 1307235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1308db8dac20SDavid S. Miller } 1309db8dac20SDavid S. Miller return err; 1310db8dac20SDavid S. Miller 1311db8dac20SDavid S. Miller do_confirm: 1312db8dac20SDavid S. Miller dst_confirm(dst); 1313db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1314db8dac20SDavid S. Miller goto back_from_confirm; 1315db8dac20SDavid S. Miller err = 0; 1316db8dac20SDavid S. Miller goto out; 1317db8dac20SDavid S. Miller } 1318db8dac20SDavid S. Miller 13197d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1320db8dac20SDavid S. Miller { 132144046a59STom Parkin struct udp_sock *up = udp_sk(sk); 1322db8dac20SDavid S. Miller lock_sock(sk); 1323db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1324db8dac20SDavid S. Miller release_sock(sk); 1325db8dac20SDavid S. Miller 132644046a59STom Parkin if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 132744046a59STom Parkin void (*encap_destroy)(struct sock *sk); 132844046a59STom Parkin encap_destroy = ACCESS_ONCE(up->encap_destroy); 132944046a59STom Parkin if (encap_destroy) 133044046a59STom Parkin encap_destroy(sk); 133144046a59STom Parkin } 133244046a59STom Parkin 1333db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1334db8dac20SDavid S. Miller } 1335db8dac20SDavid S. Miller 1336db8dac20SDavid S. Miller /* 1337db8dac20SDavid S. Miller * Socket option code for UDP 1338db8dac20SDavid S. Miller */ 1339db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1340b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1341db8dac20SDavid S. Miller { 1342db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1343db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1344db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1345db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1346db8dac20SDavid S. Miller } 1347db8dac20SDavid S. Miller 1348db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1349db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1350b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1351db8dac20SDavid S. Miller { 1352db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1353db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1354db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1355db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1356db8dac20SDavid S. Miller } 1357db8dac20SDavid S. Miller #endif 1358db8dac20SDavid S. Miller 1359db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1360db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1361db8dac20SDavid S. Miller { 1362db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1363db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1364db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1365db8dac20SDavid S. Miller } 1366db8dac20SDavid S. Miller 1367db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1368db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1369db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1370db8dac20SDavid S. Miller { 1371db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1372db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1373db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1374db8dac20SDavid S. Miller } 1375db8dac20SDavid S. Miller #endif 1376db8dac20SDavid S. Miller 137741135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1378db8dac20SDavid S. Miller .handler = udpv6_rcv, 1379db8dac20SDavid S. Miller .err_handler = udpv6_err, 1380db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1381db8dac20SDavid S. Miller }; 1382db8dac20SDavid S. Miller 1383db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1384db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1385db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1386db8dac20SDavid S. Miller { 138717ef66afSLorenzo Colitti if (v == SEQ_START_TOKEN) { 138817ef66afSLorenzo Colitti seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); 138917ef66afSLorenzo Colitti } else { 139017ef66afSLorenzo Colitti int bucket = ((struct udp_iter_state *)seq->private)->bucket; 139117ef66afSLorenzo Colitti struct inet_sock *inet = inet_sk(v); 139217ef66afSLorenzo Colitti __u16 srcp = ntohs(inet->inet_sport); 139317ef66afSLorenzo Colitti __u16 destp = ntohs(inet->inet_dport); 139417ef66afSLorenzo Colitti ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); 139517ef66afSLorenzo Colitti } 1396db8dac20SDavid S. Miller return 0; 1397db8dac20SDavid S. Miller } 1398db8dac20SDavid S. Miller 139973cb88ecSArjan van de Ven static const struct file_operations udp6_afinfo_seq_fops = { 140073cb88ecSArjan van de Ven .owner = THIS_MODULE, 140173cb88ecSArjan van de Ven .open = udp_seq_open, 140273cb88ecSArjan van de Ven .read = seq_read, 140373cb88ecSArjan van de Ven .llseek = seq_lseek, 140473cb88ecSArjan van de Ven .release = seq_release_net 140573cb88ecSArjan van de Ven }; 140673cb88ecSArjan van de Ven 1407db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1408db8dac20SDavid S. Miller .name = "udp6", 1409db8dac20SDavid S. Miller .family = AF_INET6, 1410645ca708SEric Dumazet .udp_table = &udp_table, 141173cb88ecSArjan van de Ven .seq_fops = &udp6_afinfo_seq_fops, 1412dda61925SDenis V. Lunev .seq_ops = { 1413dda61925SDenis V. Lunev .show = udp6_seq_show, 1414dda61925SDenis V. Lunev }, 1415db8dac20SDavid S. Miller }; 1416db8dac20SDavid S. Miller 14172c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1418db8dac20SDavid S. Miller { 14190c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1420db8dac20SDavid S. Miller } 1421db8dac20SDavid S. Miller 14220c96d8c5SDaniel Lezcano void udp6_proc_exit(struct net *net) { 14230c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1424db8dac20SDavid S. Miller } 1425db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1426db8dac20SDavid S. Miller 1427f77d6021SEric Dumazet void udp_v6_clear_sk(struct sock *sk, int size) 1428f77d6021SEric Dumazet { 1429f77d6021SEric Dumazet struct inet_sock *inet = inet_sk(sk); 1430f77d6021SEric Dumazet 1431f77d6021SEric Dumazet /* we do not want to clear pinet6 field, because of RCU lookups */ 1432f77d6021SEric Dumazet sk_prot_clear_portaddr_nulls(sk, offsetof(struct inet_sock, pinet6)); 1433f77d6021SEric Dumazet 1434f77d6021SEric Dumazet size -= offsetof(struct inet_sock, pinet6) + sizeof(inet->pinet6); 1435f77d6021SEric Dumazet memset(&inet->pinet6 + 1, 0, size); 1436f77d6021SEric Dumazet } 1437f77d6021SEric Dumazet 1438db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1439db8dac20SDavid S. Miller 1440db8dac20SDavid S. Miller struct proto udpv6_prot = { 1441db8dac20SDavid S. Miller .name = "UDPv6", 1442db8dac20SDavid S. Miller .owner = THIS_MODULE, 1443db8dac20SDavid S. Miller .close = udp_lib_close, 1444db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1445db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1446db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1447db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1448db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1449db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1450db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1451db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1452f7ad74feSBenjamin LaHaise .backlog_rcv = __udpv6_queue_rcv_skb, 1453db8dac20SDavid S. Miller .hash = udp_lib_hash, 1454db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1455719f8358SEric Dumazet .rehash = udp_v6_rehash, 1456db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1457db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1458db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1459db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1460db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1461db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1462271b72c7SEric Dumazet .slab_flags = SLAB_DESTROY_BY_RCU, 1463645ca708SEric Dumazet .h.udp_table = &udp_table, 1464db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1465db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1466db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1467db8dac20SDavid S. Miller #endif 1468f77d6021SEric Dumazet .clear_sk = udp_v6_clear_sk, 1469db8dac20SDavid S. Miller }; 1470db8dac20SDavid S. Miller 1471db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1472db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1473db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1474db8dac20SDavid S. Miller .prot = &udpv6_prot, 1475db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1476db8dac20SDavid S. Miller .no_check = UDP_CSUM_DEFAULT, 1477db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1478db8dac20SDavid S. Miller }; 1479db8dac20SDavid S. Miller 1480db8dac20SDavid S. Miller 1481db8dac20SDavid S. Miller int __init udpv6_init(void) 1482db8dac20SDavid S. Miller { 1483db8dac20SDavid S. Miller int ret; 1484db8dac20SDavid S. Miller 14853336288aSVlad Yasevich ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 14863336288aSVlad Yasevich if (ret) 1487c6b641a4SVlad Yasevich goto out; 14883336288aSVlad Yasevich 1489db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1490db8dac20SDavid S. Miller if (ret) 1491db8dac20SDavid S. Miller goto out_udpv6_protocol; 1492db8dac20SDavid S. Miller out: 1493db8dac20SDavid S. Miller return ret; 1494db8dac20SDavid S. Miller 1495db8dac20SDavid S. Miller out_udpv6_protocol: 1496db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1497db8dac20SDavid S. Miller goto out; 1498db8dac20SDavid S. Miller } 1499db8dac20SDavid S. Miller 1500db8dac20SDavid S. Miller void udpv6_exit(void) 1501db8dac20SDavid S. Miller { 1502db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1503db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1504db8dac20SDavid S. Miller } 1505