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> 49db8dac20SDavid S. Miller 50db8dac20SDavid S. Miller #include <linux/proc_fs.h> 51db8dac20SDavid S. Miller #include <linux/seq_file.h> 5222911fc5SEric Dumazet #include <trace/events/skb.h> 53db8dac20SDavid S. Miller #include "udp_impl.h" 54db8dac20SDavid S. Miller 55b2f5e7cdSVlad Yasevich int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) 56b2f5e7cdSVlad Yasevich { 57b2f5e7cdSVlad Yasevich const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; 58b2f5e7cdSVlad Yasevich const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); 5968835abaSEric Dumazet __be32 sk1_rcv_saddr = sk_rcv_saddr(sk); 6068835abaSEric Dumazet __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2); 61b2f5e7cdSVlad Yasevich int sk_ipv6only = ipv6_only_sock(sk); 62b2f5e7cdSVlad Yasevich int sk2_ipv6only = inet_v6_ipv6only(sk2); 63b2f5e7cdSVlad Yasevich int addr_type = ipv6_addr_type(sk_rcv_saddr6); 64b2f5e7cdSVlad Yasevich int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; 65b2f5e7cdSVlad Yasevich 66b2f5e7cdSVlad Yasevich /* if both are mapped, treat as IPv4 */ 67b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) 68499923c7SVlad Yasevich return (!sk2_ipv6only && 69c720c7e8SEric Dumazet (!sk1_rcv_saddr || !sk2_rcv_saddr || 70c720c7e8SEric Dumazet sk1_rcv_saddr == sk2_rcv_saddr)); 71b2f5e7cdSVlad Yasevich 72b2f5e7cdSVlad Yasevich if (addr_type2 == IPV6_ADDR_ANY && 73b2f5e7cdSVlad Yasevich !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) 74b2f5e7cdSVlad Yasevich return 1; 75b2f5e7cdSVlad Yasevich 76b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_ANY && 77b2f5e7cdSVlad Yasevich !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) 78b2f5e7cdSVlad Yasevich return 1; 79b2f5e7cdSVlad Yasevich 80b2f5e7cdSVlad Yasevich if (sk2_rcv_saddr6 && 81b2f5e7cdSVlad Yasevich ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) 82b2f5e7cdSVlad Yasevich return 1; 83b2f5e7cdSVlad Yasevich 84b2f5e7cdSVlad Yasevich return 0; 85b2f5e7cdSVlad Yasevich } 86b2f5e7cdSVlad Yasevich 87d4cada4aSEric Dumazet static unsigned int udp6_portaddr_hash(struct net *net, 88d4cada4aSEric Dumazet const struct in6_addr *addr6, 89d4cada4aSEric Dumazet unsigned int port) 90d4cada4aSEric Dumazet { 91d4cada4aSEric Dumazet unsigned int hash, mix = net_hash_mix(net); 92d4cada4aSEric Dumazet 93d4cada4aSEric Dumazet if (ipv6_addr_any(addr6)) 94d4cada4aSEric Dumazet hash = jhash_1word(0, mix); 95856540eeSBrian Haley else if (ipv6_addr_v4mapped(addr6)) 960eae88f3SEric Dumazet hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); 97d4cada4aSEric Dumazet else 980eae88f3SEric Dumazet hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); 99d4cada4aSEric Dumazet 100d4cada4aSEric Dumazet return hash ^ port; 101d4cada4aSEric Dumazet } 102d4cada4aSEric Dumazet 103d4cada4aSEric Dumazet 1046ba5a3c5SPavel Emelyanov int udp_v6_get_port(struct sock *sk, unsigned short snum) 105db8dac20SDavid S. Miller { 10630fff923SEric Dumazet unsigned int hash2_nulladdr = 10730fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); 10830fff923SEric Dumazet unsigned int hash2_partial = 10930fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0); 11030fff923SEric Dumazet 111d4cada4aSEric Dumazet /* precompute partial secondary hash */ 11230fff923SEric Dumazet udp_sk(sk)->udp_portaddr_hash = hash2_partial; 11330fff923SEric Dumazet return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); 114db8dac20SDavid S. Miller } 115db8dac20SDavid S. Miller 116719f8358SEric Dumazet static void udp_v6_rehash(struct sock *sk) 117719f8358SEric Dumazet { 118719f8358SEric Dumazet u16 new_hash = udp6_portaddr_hash(sock_net(sk), 119719f8358SEric Dumazet &inet6_sk(sk)->rcv_saddr, 120719f8358SEric Dumazet inet_sk(sk)->inet_num); 121719f8358SEric Dumazet 122719f8358SEric Dumazet udp_lib_rehash(sk, new_hash); 123719f8358SEric Dumazet } 124719f8358SEric Dumazet 125645ca708SEric Dumazet static inline int compute_score(struct sock *sk, struct net *net, 126645ca708SEric Dumazet unsigned short hnum, 12788440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 12888440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 129645ca708SEric Dumazet int dif) 130db8dac20SDavid S. Miller { 131645ca708SEric Dumazet int score = -1; 132db8dac20SDavid S. Miller 133d4cada4aSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 134db8dac20SDavid S. Miller sk->sk_family == PF_INET6) { 135db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 136645ca708SEric Dumazet struct inet_sock *inet = inet_sk(sk); 137645ca708SEric Dumazet 138645ca708SEric Dumazet score = 0; 139c720c7e8SEric Dumazet if (inet->inet_dport) { 140c720c7e8SEric Dumazet if (inet->inet_dport != sport) 141645ca708SEric Dumazet return -1; 142db8dac20SDavid S. Miller score++; 143db8dac20SDavid S. Miller } 144db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 145db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) 146645ca708SEric Dumazet return -1; 147db8dac20SDavid S. Miller score++; 148db8dac20SDavid S. Miller } 149db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr)) { 150db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->daddr, saddr)) 151645ca708SEric Dumazet return -1; 152db8dac20SDavid S. Miller score++; 153db8dac20SDavid S. Miller } 154db8dac20SDavid S. Miller if (sk->sk_bound_dev_if) { 155db8dac20SDavid S. Miller if (sk->sk_bound_dev_if != dif) 156645ca708SEric Dumazet return -1; 157db8dac20SDavid S. Miller score++; 158db8dac20SDavid S. Miller } 159645ca708SEric Dumazet } 160645ca708SEric Dumazet return score; 161645ca708SEric Dumazet } 162645ca708SEric Dumazet 163fddc17deSEric Dumazet #define SCORE2_MAX (1 + 1 + 1) 164fddc17deSEric Dumazet static inline int compute_score2(struct sock *sk, struct net *net, 165fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 166fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned short hnum, 167fddc17deSEric Dumazet int dif) 168fddc17deSEric Dumazet { 169fddc17deSEric Dumazet int score = -1; 170fddc17deSEric Dumazet 171fddc17deSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 172fddc17deSEric Dumazet sk->sk_family == PF_INET6) { 173fddc17deSEric Dumazet struct ipv6_pinfo *np = inet6_sk(sk); 174fddc17deSEric Dumazet struct inet_sock *inet = inet_sk(sk); 175fddc17deSEric Dumazet 176fddc17deSEric Dumazet if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) 177fddc17deSEric Dumazet return -1; 178fddc17deSEric Dumazet score = 0; 179fddc17deSEric Dumazet if (inet->inet_dport) { 180fddc17deSEric Dumazet if (inet->inet_dport != sport) 181fddc17deSEric Dumazet return -1; 182fddc17deSEric Dumazet score++; 183fddc17deSEric Dumazet } 184fddc17deSEric Dumazet if (!ipv6_addr_any(&np->daddr)) { 185fddc17deSEric Dumazet if (!ipv6_addr_equal(&np->daddr, saddr)) 186fddc17deSEric Dumazet return -1; 187fddc17deSEric Dumazet score++; 188fddc17deSEric Dumazet } 189fddc17deSEric Dumazet if (sk->sk_bound_dev_if) { 190fddc17deSEric Dumazet if (sk->sk_bound_dev_if != dif) 191fddc17deSEric Dumazet return -1; 192fddc17deSEric Dumazet score++; 193fddc17deSEric Dumazet } 194fddc17deSEric Dumazet } 195fddc17deSEric Dumazet return score; 196fddc17deSEric Dumazet } 197fddc17deSEric Dumazet 198fddc17deSEric Dumazet 199fddc17deSEric Dumazet /* called with read_rcu_lock() */ 200fddc17deSEric Dumazet static struct sock *udp6_lib_lookup2(struct net *net, 201fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 202fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned int hnum, int dif, 203fddc17deSEric Dumazet struct udp_hslot *hslot2, unsigned int slot2) 204fddc17deSEric Dumazet { 205fddc17deSEric Dumazet struct sock *sk, *result; 206fddc17deSEric Dumazet struct hlist_nulls_node *node; 20772289b96STom Herbert int score, badness, matches = 0, reuseport = 0; 20872289b96STom Herbert u32 hash = 0; 209fddc17deSEric Dumazet 210fddc17deSEric Dumazet begin: 211fddc17deSEric Dumazet result = NULL; 212fddc17deSEric Dumazet badness = -1; 213fddc17deSEric Dumazet udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { 214fddc17deSEric Dumazet score = compute_score2(sk, net, saddr, sport, 215fddc17deSEric Dumazet daddr, hnum, dif); 216fddc17deSEric Dumazet if (score > badness) { 217fddc17deSEric Dumazet result = sk; 218fddc17deSEric Dumazet badness = score; 21972289b96STom Herbert reuseport = sk->sk_reuseport; 22072289b96STom Herbert if (reuseport) { 22172289b96STom Herbert hash = inet6_ehashfn(net, daddr, hnum, 22272289b96STom Herbert saddr, sport); 22372289b96STom Herbert matches = 1; 22472289b96STom Herbert } else if (score == SCORE2_MAX) 225fddc17deSEric Dumazet goto exact_match; 22672289b96STom Herbert } else if (score == badness && reuseport) { 22772289b96STom Herbert matches++; 22872289b96STom Herbert if (((u64)hash * matches) >> 32 == 0) 22972289b96STom Herbert result = sk; 23072289b96STom Herbert hash = next_pseudo_random32(hash); 231fddc17deSEric Dumazet } 232fddc17deSEric Dumazet } 233fddc17deSEric Dumazet /* 234fddc17deSEric Dumazet * if the nulls value we got at the end of this lookup is 235fddc17deSEric Dumazet * not the expected one, we must restart lookup. 236fddc17deSEric Dumazet * We probably met an item that was moved to another chain. 237fddc17deSEric Dumazet */ 238fddc17deSEric Dumazet if (get_nulls_value(node) != slot2) 239fddc17deSEric Dumazet goto begin; 240fddc17deSEric Dumazet 241fddc17deSEric Dumazet if (result) { 242fddc17deSEric Dumazet exact_match: 243c31504dcSEric Dumazet if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) 244fddc17deSEric Dumazet result = NULL; 245fddc17deSEric Dumazet else if (unlikely(compute_score2(result, net, saddr, sport, 246fddc17deSEric Dumazet daddr, hnum, dif) < badness)) { 247fddc17deSEric Dumazet sock_put(result); 248fddc17deSEric Dumazet goto begin; 249fddc17deSEric Dumazet } 250fddc17deSEric Dumazet } 251fddc17deSEric Dumazet return result; 252fddc17deSEric Dumazet } 253fddc17deSEric Dumazet 254fce82338SPavel Emelyanov struct sock *__udp6_lib_lookup(struct net *net, 25588440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 25688440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 257645ca708SEric Dumazet int dif, struct udp_table *udptable) 258645ca708SEric Dumazet { 259271b72c7SEric Dumazet struct sock *sk, *result; 26088ab1932SEric Dumazet struct hlist_nulls_node *node; 261645ca708SEric Dumazet unsigned short hnum = ntohs(dport); 262fddc17deSEric Dumazet unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); 263fddc17deSEric Dumazet struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; 26472289b96STom Herbert int score, badness, matches = 0, reuseport = 0; 26572289b96STom Herbert u32 hash = 0; 266645ca708SEric Dumazet 267271b72c7SEric Dumazet rcu_read_lock(); 268fddc17deSEric Dumazet if (hslot->count > 10) { 269fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, daddr, hnum); 270fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 271fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 272fddc17deSEric Dumazet if (hslot->count < hslot2->count) 273fddc17deSEric Dumazet goto begin; 274fddc17deSEric Dumazet 275fddc17deSEric Dumazet result = udp6_lib_lookup2(net, saddr, sport, 276fddc17deSEric Dumazet daddr, hnum, dif, 277fddc17deSEric Dumazet hslot2, slot2); 278fddc17deSEric Dumazet if (!result) { 279fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); 280fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 281fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 282fddc17deSEric Dumazet if (hslot->count < hslot2->count) 283fddc17deSEric Dumazet goto begin; 284fddc17deSEric Dumazet 2851223c67cSJorge Boncompte [DTI2] result = udp6_lib_lookup2(net, saddr, sport, 2861223c67cSJorge Boncompte [DTI2] &in6addr_any, hnum, dif, 287fddc17deSEric Dumazet hslot2, slot2); 288fddc17deSEric Dumazet } 289fddc17deSEric Dumazet rcu_read_unlock(); 290fddc17deSEric Dumazet return result; 291fddc17deSEric Dumazet } 292271b72c7SEric Dumazet begin: 293271b72c7SEric Dumazet result = NULL; 294271b72c7SEric Dumazet badness = -1; 29588ab1932SEric Dumazet sk_nulls_for_each_rcu(sk, node, &hslot->head) { 296645ca708SEric Dumazet score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); 297645ca708SEric Dumazet if (score > badness) { 298db8dac20SDavid S. Miller result = sk; 299db8dac20SDavid S. Miller badness = score; 30072289b96STom Herbert reuseport = sk->sk_reuseport; 30172289b96STom Herbert if (reuseport) { 30272289b96STom Herbert hash = inet6_ehashfn(net, daddr, hnum, 30372289b96STom Herbert saddr, sport); 30472289b96STom Herbert matches = 1; 30572289b96STom Herbert } 30672289b96STom Herbert } else if (score == badness && reuseport) { 30772289b96STom Herbert matches++; 30872289b96STom Herbert if (((u64)hash * matches) >> 32 == 0) 30972289b96STom Herbert result = sk; 31072289b96STom Herbert hash = next_pseudo_random32(hash); 311db8dac20SDavid S. Miller } 312db8dac20SDavid S. Miller } 31388ab1932SEric Dumazet /* 31488ab1932SEric Dumazet * if the nulls value we got at the end of this lookup is 31588ab1932SEric Dumazet * not the expected one, we must restart lookup. 31688ab1932SEric Dumazet * We probably met an item that was moved to another chain. 31788ab1932SEric Dumazet */ 318fddc17deSEric Dumazet if (get_nulls_value(node) != slot) 31988ab1932SEric Dumazet goto begin; 32088ab1932SEric Dumazet 321271b72c7SEric Dumazet if (result) { 322c31504dcSEric Dumazet if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) 323271b72c7SEric Dumazet result = NULL; 324271b72c7SEric Dumazet else if (unlikely(compute_score(result, net, hnum, saddr, sport, 325271b72c7SEric Dumazet daddr, dport, dif) < badness)) { 326271b72c7SEric Dumazet sock_put(result); 327271b72c7SEric Dumazet goto begin; 328271b72c7SEric Dumazet } 329271b72c7SEric Dumazet } 330271b72c7SEric Dumazet rcu_read_unlock(); 331db8dac20SDavid S. Miller return result; 332db8dac20SDavid S. Miller } 333fce82338SPavel Emelyanov EXPORT_SYMBOL_GPL(__udp6_lib_lookup); 334db8dac20SDavid S. Miller 335607c4aafSKOVACS Krisztian static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, 336607c4aafSKOVACS Krisztian __be16 sport, __be16 dport, 337645ca708SEric Dumazet struct udp_table *udptable) 338607c4aafSKOVACS Krisztian { 33923542618SKOVACS Krisztian struct sock *sk; 340b71d1d42SEric Dumazet const struct ipv6hdr *iph = ipv6_hdr(skb); 341607c4aafSKOVACS Krisztian 34223542618SKOVACS Krisztian if (unlikely(sk = skb_steal_sock(skb))) 34323542618SKOVACS Krisztian return sk; 344adf30907SEric Dumazet return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, 345607c4aafSKOVACS Krisztian &iph->daddr, dport, inet6_iif(skb), 346607c4aafSKOVACS Krisztian udptable); 347607c4aafSKOVACS Krisztian } 348607c4aafSKOVACS Krisztian 349aa976fc0SBalazs Scheidler struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, 350aa976fc0SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, int dif) 351aa976fc0SBalazs Scheidler { 352aa976fc0SBalazs Scheidler return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); 353aa976fc0SBalazs Scheidler } 354aa976fc0SBalazs Scheidler EXPORT_SYMBOL_GPL(udp6_lib_lookup); 355aa976fc0SBalazs Scheidler 356aa976fc0SBalazs Scheidler 357db8dac20SDavid S. Miller /* 358db8dac20SDavid S. Miller * This should be easy, if there is something there we 359db8dac20SDavid S. Miller * return it, otherwise we block. 360db8dac20SDavid S. Miller */ 361db8dac20SDavid S. Miller 362db8dac20SDavid S. Miller int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, 363db8dac20SDavid S. Miller struct msghdr *msg, size_t len, 364db8dac20SDavid S. Miller int noblock, int flags, int *addr_len) 365db8dac20SDavid S. Miller { 366db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 367db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 368db8dac20SDavid S. Miller struct sk_buff *skb; 36959c2cdaeSDavid S. Miller unsigned int ulen, copied; 3703f518bf7SPavel Emelyanov int peeked, off = 0; 371db8dac20SDavid S. Miller int err; 372db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 373f26ba175SWei Yongjun int is_udp4; 3748a74ad60SEric Dumazet bool slow; 375db8dac20SDavid S. Miller 376db8dac20SDavid S. Miller if (addr_len) 377db8dac20SDavid S. Miller *addr_len = sizeof(struct sockaddr_in6); 378db8dac20SDavid S. Miller 379db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 380db8dac20SDavid S. Miller return ipv6_recv_error(sk, msg, len); 381db8dac20SDavid S. Miller 3824b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 3834b340ae2SBrian Haley return ipv6_recv_rxpmtu(sk, msg, len); 3844b340ae2SBrian Haley 385db8dac20SDavid S. Miller try_again: 386db8dac20SDavid S. Miller skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), 3873f518bf7SPavel Emelyanov &peeked, &off, &err); 388db8dac20SDavid S. Miller if (!skb) 389db8dac20SDavid S. Miller goto out; 390db8dac20SDavid S. Miller 391db8dac20SDavid S. Miller ulen = skb->len - sizeof(struct udphdr); 39259c2cdaeSDavid S. Miller copied = len; 39359c2cdaeSDavid S. Miller if (copied > ulen) 39459c2cdaeSDavid S. Miller copied = ulen; 39559c2cdaeSDavid S. Miller else if (copied < ulen) 396db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 397db8dac20SDavid S. Miller 398f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 399f26ba175SWei Yongjun 400db8dac20SDavid S. Miller /* 401db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 402db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 403db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 404db8dac20SDavid S. Miller */ 405db8dac20SDavid S. Miller 40659c2cdaeSDavid S. Miller if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { 407db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 408db8dac20SDavid S. Miller goto csum_copy_err; 409db8dac20SDavid S. Miller } 410db8dac20SDavid S. Miller 411db8dac20SDavid S. Miller if (skb_csum_unnecessary(skb)) 412db8dac20SDavid S. Miller err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), 41359c2cdaeSDavid S. Miller msg->msg_iov, copied); 414db8dac20SDavid S. Miller else { 415db8dac20SDavid S. Miller err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); 416db8dac20SDavid S. Miller if (err == -EINVAL) 417db8dac20SDavid S. Miller goto csum_copy_err; 418db8dac20SDavid S. Miller } 41922911fc5SEric Dumazet if (unlikely(err)) { 42022911fc5SEric Dumazet trace_kfree_skb(skb, udpv6_recvmsg); 421979402b1SEric Dumazet if (!peeked) { 422979402b1SEric Dumazet atomic_inc(&sk->sk_drops); 423979402b1SEric Dumazet if (is_udp4) 424979402b1SEric Dumazet UDP_INC_STATS_USER(sock_net(sk), 425979402b1SEric Dumazet UDP_MIB_INERRORS, 426979402b1SEric Dumazet is_udplite); 427979402b1SEric Dumazet else 428979402b1SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 429979402b1SEric Dumazet UDP_MIB_INERRORS, 430979402b1SEric Dumazet is_udplite); 431979402b1SEric Dumazet } 432db8dac20SDavid S. Miller goto out_free; 43322911fc5SEric Dumazet } 434f26ba175SWei Yongjun if (!peeked) { 435f26ba175SWei Yongjun if (is_udp4) 436f26ba175SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 437f26ba175SWei Yongjun UDP_MIB_INDATAGRAMS, is_udplite); 438f26ba175SWei Yongjun else 439235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 440235b9f7aSPavel Emelyanov UDP_MIB_INDATAGRAMS, is_udplite); 441f26ba175SWei Yongjun } 442db8dac20SDavid S. Miller 4433b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 444db8dac20SDavid S. Miller 445db8dac20SDavid S. Miller /* Copy the address. */ 446db8dac20SDavid S. Miller if (msg->msg_name) { 447db8dac20SDavid S. Miller struct sockaddr_in6 *sin6; 448db8dac20SDavid S. Miller 449db8dac20SDavid S. Miller sin6 = (struct sockaddr_in6 *) msg->msg_name; 450db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 451db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 452db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 453db8dac20SDavid S. Miller sin6->sin6_scope_id = 0; 454db8dac20SDavid S. Miller 455f26ba175SWei Yongjun if (is_udp4) 456b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 457b301e82cSBrian Haley &sin6->sin6_addr); 458db8dac20SDavid S. Miller else { 4594e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr; 460db8dac20SDavid S. Miller if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 461db8dac20SDavid S. Miller sin6->sin6_scope_id = IP6CB(skb)->iif; 462db8dac20SDavid S. Miller } 463db8dac20SDavid S. Miller 464db8dac20SDavid S. Miller } 465f26ba175SWei Yongjun if (is_udp4) { 466db8dac20SDavid S. Miller if (inet->cmsg_flags) 467db8dac20SDavid S. Miller ip_cmsg_recv(msg, skb); 468db8dac20SDavid S. Miller } else { 469db8dac20SDavid S. Miller if (np->rxopt.all) 470db8dac20SDavid S. Miller datagram_recv_ctl(sk, msg, skb); 471db8dac20SDavid S. Miller } 472db8dac20SDavid S. Miller 47359c2cdaeSDavid S. Miller err = copied; 474db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 475db8dac20SDavid S. Miller err = ulen; 476db8dac20SDavid S. Miller 477db8dac20SDavid S. Miller out_free: 4789d410c79SEric Dumazet skb_free_datagram_locked(sk, skb); 479db8dac20SDavid S. Miller out: 480db8dac20SDavid S. Miller return err; 481db8dac20SDavid S. Miller 482db8dac20SDavid S. Miller csum_copy_err: 4838a74ad60SEric Dumazet slow = lock_sock_fast(sk); 4840856f939SWei Yongjun if (!skb_kill_datagram(sk, skb, flags)) { 4850856f939SWei Yongjun if (is_udp4) 4860856f939SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 4870856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4880856f939SWei Yongjun else 4890856f939SWei Yongjun UDP6_INC_STATS_USER(sock_net(sk), 4900856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4910856f939SWei Yongjun } 4928a74ad60SEric Dumazet unlock_sock_fast(sk, slow); 493db8dac20SDavid S. Miller 49432c90254SXufeng Zhang if (noblock) 495db8dac20SDavid S. Miller return -EAGAIN; 4969cfaa8deSXufeng Zhang 4979cfaa8deSXufeng Zhang /* starting over for a new packet */ 4989cfaa8deSXufeng Zhang msg->msg_flags &= ~MSG_TRUNC; 499db8dac20SDavid S. Miller goto try_again; 500db8dac20SDavid S. Miller } 501db8dac20SDavid S. Miller 502db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 503d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 504645ca708SEric Dumazet struct udp_table *udptable) 505db8dac20SDavid S. Miller { 506db8dac20SDavid S. Miller struct ipv6_pinfo *np; 507b71d1d42SEric Dumazet const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; 508b71d1d42SEric Dumazet const struct in6_addr *saddr = &hdr->saddr; 509b71d1d42SEric Dumazet const struct in6_addr *daddr = &hdr->daddr; 510db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr*)(skb->data+offset); 511db8dac20SDavid S. Miller struct sock *sk; 512db8dac20SDavid S. Miller int err; 513db8dac20SDavid S. Miller 514c346dca1SYOSHIFUJI Hideaki sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, 515db8dac20SDavid S. Miller saddr, uh->source, inet6_iif(skb), udptable); 516db8dac20SDavid S. Miller if (sk == NULL) 517db8dac20SDavid S. Miller return; 518db8dac20SDavid S. Miller 51981aded24SDavid S. Miller if (type == ICMPV6_PKT_TOOBIG) 52081aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info); 521ec18d9a2SDavid S. Miller if (type == NDISC_REDIRECT) 522ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk); 52381aded24SDavid S. Miller 524db8dac20SDavid S. Miller np = inet6_sk(sk); 525db8dac20SDavid S. Miller 526db8dac20SDavid S. Miller if (!icmpv6_err_convert(type, code, &err) && !np->recverr) 527db8dac20SDavid S. Miller goto out; 528db8dac20SDavid S. Miller 529db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) 530db8dac20SDavid S. Miller goto out; 531db8dac20SDavid S. Miller 532b1faf566SEric Dumazet if (np->recverr) 533db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 534b1faf566SEric Dumazet 535db8dac20SDavid S. Miller sk->sk_err = err; 536db8dac20SDavid S. Miller sk->sk_error_report(sk); 537db8dac20SDavid S. Miller out: 538db8dac20SDavid S. Miller sock_put(sk); 539db8dac20SDavid S. Miller } 540db8dac20SDavid S. Miller 541f7ad74feSBenjamin LaHaise static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 542f7ad74feSBenjamin LaHaise { 543f7ad74feSBenjamin LaHaise int rc; 544f7ad74feSBenjamin LaHaise 545f7ad74feSBenjamin LaHaise if (!ipv6_addr_any(&inet6_sk(sk)->daddr)) 546f7ad74feSBenjamin LaHaise sock_rps_save_rxhash(sk, skb); 547f7ad74feSBenjamin LaHaise 548f7ad74feSBenjamin LaHaise rc = sock_queue_rcv_skb(sk, skb); 549f7ad74feSBenjamin LaHaise if (rc < 0) { 550f7ad74feSBenjamin LaHaise int is_udplite = IS_UDPLITE(sk); 551f7ad74feSBenjamin LaHaise 552f7ad74feSBenjamin LaHaise /* Note that an ENOMEM error is charged twice */ 553f7ad74feSBenjamin LaHaise if (rc == -ENOMEM) 554f7ad74feSBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), 555f7ad74feSBenjamin LaHaise UDP_MIB_RCVBUFERRORS, is_udplite); 556f7ad74feSBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 557f7ad74feSBenjamin LaHaise kfree_skb(skb); 558f7ad74feSBenjamin LaHaise return -1; 559f7ad74feSBenjamin LaHaise } 560f7ad74feSBenjamin LaHaise return 0; 561f7ad74feSBenjamin LaHaise } 562f7ad74feSBenjamin LaHaise 563db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 564d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 565d5fdd6baSBrian Haley u8 code, int offset, __be32 info ) 566db8dac20SDavid S. Miller { 567645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 568db8dac20SDavid S. Miller } 569db8dac20SDavid S. Miller 570d7f3f621SBenjamin LaHaise static struct static_key udpv6_encap_needed __read_mostly; 571d7f3f621SBenjamin LaHaise void udpv6_encap_enable(void) 572d7f3f621SBenjamin LaHaise { 573d7f3f621SBenjamin LaHaise if (!static_key_enabled(&udpv6_encap_needed)) 574d7f3f621SBenjamin LaHaise static_key_slow_inc(&udpv6_encap_needed); 575d7f3f621SBenjamin LaHaise } 576d7f3f621SBenjamin LaHaise EXPORT_SYMBOL(udpv6_encap_enable); 577d7f3f621SBenjamin LaHaise 578db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 579db8dac20SDavid S. Miller { 580db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 581db8dac20SDavid S. Miller int rc; 582db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 583db8dac20SDavid S. Miller 584db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 585db8dac20SDavid S. Miller goto drop; 586db8dac20SDavid S. Miller 587d7f3f621SBenjamin LaHaise if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 588d7f3f621SBenjamin LaHaise int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); 589d7f3f621SBenjamin LaHaise 590d7f3f621SBenjamin LaHaise /* 591d7f3f621SBenjamin LaHaise * This is an encapsulation socket so pass the skb to 592d7f3f621SBenjamin LaHaise * the socket's udp_encap_rcv() hook. Otherwise, just 593d7f3f621SBenjamin LaHaise * fall through and pass this up the UDP socket. 594d7f3f621SBenjamin LaHaise * up->encap_rcv() returns the following value: 595d7f3f621SBenjamin LaHaise * =0 if skb was successfully passed to the encap 596d7f3f621SBenjamin LaHaise * handler or was discarded by it. 597d7f3f621SBenjamin LaHaise * >0 if skb should be passed on to UDP. 598d7f3f621SBenjamin LaHaise * <0 if skb should be resubmitted as proto -N 599d7f3f621SBenjamin LaHaise */ 600d7f3f621SBenjamin LaHaise 601d7f3f621SBenjamin LaHaise /* if we're overly short, let UDP handle it */ 602d7f3f621SBenjamin LaHaise encap_rcv = ACCESS_ONCE(up->encap_rcv); 603d7f3f621SBenjamin LaHaise if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) { 604d7f3f621SBenjamin LaHaise int ret; 605d7f3f621SBenjamin LaHaise 606d7f3f621SBenjamin LaHaise ret = encap_rcv(sk, skb); 607d7f3f621SBenjamin LaHaise if (ret <= 0) { 608d7f3f621SBenjamin LaHaise UDP_INC_STATS_BH(sock_net(sk), 609d7f3f621SBenjamin LaHaise UDP_MIB_INDATAGRAMS, 610d7f3f621SBenjamin LaHaise is_udplite); 611d7f3f621SBenjamin LaHaise return -ret; 612d7f3f621SBenjamin LaHaise } 613d7f3f621SBenjamin LaHaise } 614d7f3f621SBenjamin LaHaise 615d7f3f621SBenjamin LaHaise /* FALLTHROUGH -- it's a UDP Packet */ 616d7f3f621SBenjamin LaHaise } 617d7f3f621SBenjamin LaHaise 618db8dac20SDavid S. Miller /* 619db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 620db8dac20SDavid S. Miller */ 621db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 622db8dac20SDavid S. Miller 623db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 624db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" 625db8dac20SDavid S. Miller " %d while full coverage %d requested\n", 626db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 627db8dac20SDavid S. Miller goto drop; 628db8dac20SDavid S. Miller } 629db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 630db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " 631db8dac20SDavid S. Miller "too small, need min %d\n", 632db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 633db8dac20SDavid S. Miller goto drop; 634db8dac20SDavid S. Miller } 635db8dac20SDavid S. Miller } 636db8dac20SDavid S. Miller 63733d480ceSEric Dumazet if (rcu_access_pointer(sk->sk_filter)) { 638db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 639db8dac20SDavid S. Miller goto drop; 640db8dac20SDavid S. Miller } 641db8dac20SDavid S. Miller 642cb80ef46SBenjamin LaHaise if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) 643cb80ef46SBenjamin LaHaise goto drop; 644cb80ef46SBenjamin LaHaise 645d826eb14SEric Dumazet skb_dst_drop(skb); 646db8dac20SDavid S. Miller 647cb80ef46SBenjamin LaHaise bh_lock_sock(sk); 648cb80ef46SBenjamin LaHaise rc = 0; 649cb80ef46SBenjamin LaHaise if (!sock_owned_by_user(sk)) 650f7ad74feSBenjamin LaHaise rc = __udpv6_queue_rcv_skb(sk, skb); 651cb80ef46SBenjamin LaHaise else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { 652cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 653cb80ef46SBenjamin LaHaise goto drop; 654cb80ef46SBenjamin LaHaise } 655cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 656f7ad74feSBenjamin LaHaise 657f7ad74feSBenjamin LaHaise return rc; 658db8dac20SDavid S. Miller drop: 659ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 660cb80ef46SBenjamin LaHaise atomic_inc(&sk->sk_drops); 661db8dac20SDavid S. Miller kfree_skb(skb); 662db8dac20SDavid S. Miller return -1; 663db8dac20SDavid S. Miller } 664db8dac20SDavid S. Miller 665920a4611SEric Dumazet static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, 666b71d1d42SEric Dumazet __be16 loc_port, const struct in6_addr *loc_addr, 667b71d1d42SEric Dumazet __be16 rmt_port, const struct in6_addr *rmt_addr, 668db8dac20SDavid S. Miller int dif) 669db8dac20SDavid S. Miller { 67088ab1932SEric Dumazet struct hlist_nulls_node *node; 671db8dac20SDavid S. Miller struct sock *s = sk; 672db8dac20SDavid S. Miller unsigned short num = ntohs(loc_port); 673db8dac20SDavid S. Miller 67488ab1932SEric Dumazet sk_nulls_for_each_from(s, node) { 675db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(s); 676db8dac20SDavid S. Miller 677920a4611SEric Dumazet if (!net_eq(sock_net(s), net)) 678b8ad0cbcSDaniel Lezcano continue; 679b8ad0cbcSDaniel Lezcano 680d4cada4aSEric Dumazet if (udp_sk(s)->udp_port_hash == num && 681d4cada4aSEric Dumazet s->sk_family == PF_INET6) { 682db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(s); 683c720c7e8SEric Dumazet if (inet->inet_dport) { 684c720c7e8SEric Dumazet if (inet->inet_dport != rmt_port) 685db8dac20SDavid S. Miller continue; 686db8dac20SDavid S. Miller } 687db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr) && 688db8dac20SDavid S. Miller !ipv6_addr_equal(&np->daddr, rmt_addr)) 689db8dac20SDavid S. Miller continue; 690db8dac20SDavid S. Miller 691db8dac20SDavid S. Miller if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) 692db8dac20SDavid S. Miller continue; 693db8dac20SDavid S. Miller 694db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 695db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) 696db8dac20SDavid S. Miller continue; 697db8dac20SDavid S. Miller } 698db8dac20SDavid S. Miller if (!inet6_mc_check(s, loc_addr, rmt_addr)) 699db8dac20SDavid S. Miller continue; 700db8dac20SDavid S. Miller return s; 701db8dac20SDavid S. Miller } 702db8dac20SDavid S. Miller } 703db8dac20SDavid S. Miller return NULL; 704db8dac20SDavid S. Miller } 705db8dac20SDavid S. Miller 706a1ab77f9SEric Dumazet static void flush_stack(struct sock **stack, unsigned int count, 707a1ab77f9SEric Dumazet struct sk_buff *skb, unsigned int final) 708a1ab77f9SEric Dumazet { 709cb80ef46SBenjamin LaHaise struct sk_buff *skb1 = NULL; 710a1ab77f9SEric Dumazet struct sock *sk; 711cb80ef46SBenjamin LaHaise unsigned int i; 712a1ab77f9SEric Dumazet 713a1ab77f9SEric Dumazet for (i = 0; i < count; i++) { 714a1ab77f9SEric Dumazet sk = stack[i]; 715cb80ef46SBenjamin LaHaise if (likely(skb1 == NULL)) 716cb80ef46SBenjamin LaHaise skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); 717cb80ef46SBenjamin LaHaise if (!skb1) { 718f6b8f32cSEric Dumazet atomic_inc(&sk->sk_drops); 719cb80ef46SBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS, 720cb80ef46SBenjamin LaHaise IS_UDPLITE(sk)); 721cb80ef46SBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, 722cb80ef46SBenjamin LaHaise IS_UDPLITE(sk)); 723a1ab77f9SEric Dumazet } 724cb80ef46SBenjamin LaHaise 725cb80ef46SBenjamin LaHaise if (skb1 && udpv6_queue_rcv_skb(sk, skb1) <= 0) 726cb80ef46SBenjamin LaHaise skb1 = NULL; 727cb80ef46SBenjamin LaHaise } 728cb80ef46SBenjamin LaHaise if (unlikely(skb1)) 729cb80ef46SBenjamin LaHaise kfree_skb(skb1); 730a1ab77f9SEric Dumazet } 731db8dac20SDavid S. Miller /* 732db8dac20SDavid S. Miller * Note: called only from the BH handler context, 733db8dac20SDavid S. Miller * so we don't need to lock the hashes. 734db8dac20SDavid S. Miller */ 735e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 736b71d1d42SEric Dumazet const struct in6_addr *saddr, const struct in6_addr *daddr, 737645ca708SEric Dumazet struct udp_table *udptable) 738db8dac20SDavid S. Miller { 739a1ab77f9SEric Dumazet struct sock *sk, *stack[256 / sizeof(struct sock *)]; 740db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 741f86dcc5aSEric Dumazet struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); 742db8dac20SDavid S. Miller int dif; 743a1ab77f9SEric Dumazet unsigned int i, count = 0; 744db8dac20SDavid S. Miller 745645ca708SEric Dumazet spin_lock(&hslot->lock); 74688ab1932SEric Dumazet sk = sk_nulls_head(&hslot->head); 747db8dac20SDavid S. Miller dif = inet6_iif(skb); 748920a4611SEric Dumazet sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); 749a1ab77f9SEric Dumazet while (sk) { 750a1ab77f9SEric Dumazet stack[count++] = sk; 751a1ab77f9SEric Dumazet sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, 752a1ab77f9SEric Dumazet uh->source, saddr, dif); 753a1ab77f9SEric Dumazet if (unlikely(count == ARRAY_SIZE(stack))) { 754a1ab77f9SEric Dumazet if (!sk) 755a1ab77f9SEric Dumazet break; 756a1ab77f9SEric Dumazet flush_stack(stack, count, skb, ~0); 757a1ab77f9SEric Dumazet count = 0; 758db8dac20SDavid S. Miller } 759a1ab77f9SEric Dumazet } 760a1ab77f9SEric Dumazet /* 761a1ab77f9SEric Dumazet * before releasing the lock, we must take reference on sockets 762a1ab77f9SEric Dumazet */ 763a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 764a1ab77f9SEric Dumazet sock_hold(stack[i]); 765db8dac20SDavid S. Miller 766645ca708SEric Dumazet spin_unlock(&hslot->lock); 767a1ab77f9SEric Dumazet 768a1ab77f9SEric Dumazet if (count) { 769a1ab77f9SEric Dumazet flush_stack(stack, count, skb, count - 1); 770a1ab77f9SEric Dumazet 771a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 772a1ab77f9SEric Dumazet sock_put(stack[i]); 773a1ab77f9SEric Dumazet } else { 774a1ab77f9SEric Dumazet kfree_skb(skb); 775a1ab77f9SEric Dumazet } 776db8dac20SDavid S. Miller return 0; 777db8dac20SDavid S. Miller } 778db8dac20SDavid S. Miller 779645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 780db8dac20SDavid S. Miller int proto) 781db8dac20SDavid S. Miller { 7823ffe533cSAlexey Dobriyan struct net *net = dev_net(skb->dev); 783db8dac20SDavid S. Miller struct sock *sk; 784db8dac20SDavid S. Miller struct udphdr *uh; 785b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 786db8dac20SDavid S. Miller u32 ulen = 0; 787db8dac20SDavid S. Miller 788db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 789d6bc0149SBjørn Mork goto discard; 790db8dac20SDavid S. Miller 791db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 792db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 793db8dac20SDavid S. Miller uh = udp_hdr(skb); 794db8dac20SDavid S. Miller 795db8dac20SDavid S. Miller ulen = ntohs(uh->len); 796db8dac20SDavid S. Miller if (ulen > skb->len) 797db8dac20SDavid S. Miller goto short_packet; 798db8dac20SDavid S. Miller 799db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 800db8dac20SDavid S. Miller /* UDP validates ulen. */ 801db8dac20SDavid S. Miller 802db8dac20SDavid S. Miller /* Check for jumbo payload */ 803db8dac20SDavid S. Miller if (ulen == 0) 804db8dac20SDavid S. Miller ulen = skb->len; 805db8dac20SDavid S. Miller 806db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 807db8dac20SDavid S. Miller goto short_packet; 808db8dac20SDavid S. Miller 809db8dac20SDavid S. Miller if (ulen < skb->len) { 810db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 811db8dac20SDavid S. Miller goto short_packet; 812db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 813db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 814db8dac20SDavid S. Miller uh = udp_hdr(skb); 815db8dac20SDavid S. Miller } 816db8dac20SDavid S. Miller } 817db8dac20SDavid S. Miller 818db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 819db8dac20SDavid S. Miller goto discard; 820db8dac20SDavid S. Miller 821db8dac20SDavid S. Miller /* 822db8dac20SDavid S. Miller * Multicast receive code 823db8dac20SDavid S. Miller */ 824db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 825e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 826e3163493SPavel Emelyanov saddr, daddr, udptable); 827db8dac20SDavid S. Miller 828db8dac20SDavid S. Miller /* Unicast */ 829db8dac20SDavid S. Miller 830db8dac20SDavid S. Miller /* 831db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 832db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 833db8dac20SDavid S. Miller */ 834607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 835cb80ef46SBenjamin LaHaise if (sk != NULL) { 836cb80ef46SBenjamin LaHaise int ret = udpv6_queue_rcv_skb(sk, skb); 837cb80ef46SBenjamin LaHaise sock_put(sk); 838db8dac20SDavid S. Miller 839cb80ef46SBenjamin LaHaise /* a return value > 0 means to resubmit the input, but 840cb80ef46SBenjamin LaHaise * it wants the return to be -protocol, or 0 841cb80ef46SBenjamin LaHaise */ 842cb80ef46SBenjamin LaHaise if (ret > 0) 843cb80ef46SBenjamin LaHaise return -ret; 844cb80ef46SBenjamin LaHaise 845cb80ef46SBenjamin LaHaise return 0; 846cb80ef46SBenjamin LaHaise } 847cb80ef46SBenjamin LaHaise 848db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 849db8dac20SDavid S. Miller goto discard; 850db8dac20SDavid S. Miller 851db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 852db8dac20SDavid S. Miller goto discard; 853db8dac20SDavid S. Miller 854cb80ef46SBenjamin LaHaise UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); 8553ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 856db8dac20SDavid S. Miller 857db8dac20SDavid S. Miller kfree_skb(skb); 858db8dac20SDavid S. Miller return 0; 859db8dac20SDavid S. Miller 860db8dac20SDavid S. Miller short_packet: 861d6bc0149SBjørn Mork LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 862db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 863d6bc0149SBjørn Mork saddr, 864d6bc0149SBjørn Mork ntohs(uh->source), 865d6bc0149SBjørn Mork ulen, 866d6bc0149SBjørn Mork skb->len, 867d6bc0149SBjørn Mork daddr, 868d6bc0149SBjørn Mork ntohs(uh->dest)); 869db8dac20SDavid S. Miller 870db8dac20SDavid S. Miller discard: 871ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 872db8dac20SDavid S. Miller kfree_skb(skb); 873db8dac20SDavid S. Miller return 0; 874db8dac20SDavid S. Miller } 875db8dac20SDavid S. Miller 876db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 877db8dac20SDavid S. Miller { 878645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 879db8dac20SDavid S. Miller } 880db8dac20SDavid S. Miller 881db8dac20SDavid S. Miller /* 882db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 883db8dac20SDavid S. Miller */ 884db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 885db8dac20SDavid S. Miller { 886db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 887db8dac20SDavid S. Miller 88836d926b9SDenis V. Lunev if (up->pending == AF_INET) 88936d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 89036d926b9SDenis V. Lunev else if (up->pending) { 891db8dac20SDavid S. Miller up->len = 0; 892db8dac20SDavid S. Miller up->pending = 0; 893db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 894db8dac20SDavid S. Miller } 895db8dac20SDavid S. Miller } 896db8dac20SDavid S. Miller 897493c6be3SSridhar Samudrala /** 898493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 899493c6be3SSridhar Samudrala * @sk: socket we are sending on 900493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 901493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 902493c6be3SSridhar Samudrala */ 903493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 904493c6be3SSridhar Samudrala const struct in6_addr *saddr, 905493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 906493c6be3SSridhar Samudrala { 907493c6be3SSridhar Samudrala unsigned int offset; 908493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 909493c6be3SSridhar Samudrala __wsum csum = 0; 910493c6be3SSridhar Samudrala 911493c6be3SSridhar Samudrala if (skb_queue_len(&sk->sk_write_queue) == 1) { 912493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 913493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 914493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 915493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 916493c6be3SSridhar Samudrala } else { 917493c6be3SSridhar Samudrala /* 918493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 919493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 920493c6be3SSridhar Samudrala * should be together 921493c6be3SSridhar Samudrala */ 922493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 923493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 924493c6be3SSridhar Samudrala 925493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 926493c6be3SSridhar Samudrala 927493c6be3SSridhar Samudrala skb_queue_walk(&sk->sk_write_queue, skb) { 928493c6be3SSridhar Samudrala csum = csum_add(csum, skb->csum); 929493c6be3SSridhar Samudrala } 930493c6be3SSridhar Samudrala 931493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 932493c6be3SSridhar Samudrala csum); 933493c6be3SSridhar Samudrala if (uh->check == 0) 934493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 935493c6be3SSridhar Samudrala } 936493c6be3SSridhar Samudrala } 937493c6be3SSridhar Samudrala 938db8dac20SDavid S. Miller /* 939db8dac20SDavid S. Miller * Sending 940db8dac20SDavid S. Miller */ 941db8dac20SDavid S. Miller 942db8dac20SDavid S. Miller static int udp_v6_push_pending_frames(struct sock *sk) 943db8dac20SDavid S. Miller { 944db8dac20SDavid S. Miller struct sk_buff *skb; 945db8dac20SDavid S. Miller struct udphdr *uh; 946db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 947db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 9484c9483b2SDavid S. Miller struct flowi6 *fl6 = &inet->cork.fl.u.ip6; 949db8dac20SDavid S. Miller int err = 0; 950db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 951db8dac20SDavid S. Miller __wsum csum = 0; 952db8dac20SDavid S. Miller 953db8dac20SDavid S. Miller /* Grab the skbuff where UDP header space exists. */ 954db8dac20SDavid S. Miller if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 955db8dac20SDavid S. Miller goto out; 956db8dac20SDavid S. Miller 957db8dac20SDavid S. Miller /* 958db8dac20SDavid S. Miller * Create a UDP header 959db8dac20SDavid S. Miller */ 960db8dac20SDavid S. Miller uh = udp_hdr(skb); 9611958b856SDavid S. Miller uh->source = fl6->fl6_sport; 9621958b856SDavid S. Miller uh->dest = fl6->fl6_dport; 963db8dac20SDavid S. Miller uh->len = htons(up->len); 964db8dac20SDavid S. Miller uh->check = 0; 965db8dac20SDavid S. Miller 966db8dac20SDavid S. Miller if (is_udplite) 967db8dac20SDavid S. Miller csum = udplite_csum_outgoing(sk, skb); 968493c6be3SSridhar Samudrala else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 9694c9483b2SDavid S. Miller udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, 970493c6be3SSridhar Samudrala up->len); 971493c6be3SSridhar Samudrala goto send; 972493c6be3SSridhar Samudrala } else 973db8dac20SDavid S. Miller csum = udp_csum_outgoing(sk, skb); 974db8dac20SDavid S. Miller 975db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 9764c9483b2SDavid S. Miller uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 9774c9483b2SDavid S. Miller up->len, fl6->flowi6_proto, csum); 978db8dac20SDavid S. Miller if (uh->check == 0) 979db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 980db8dac20SDavid S. Miller 981493c6be3SSridhar Samudrala send: 982db8dac20SDavid S. Miller err = ip6_push_pending_frames(sk); 9836ce9e7b5SEric Dumazet if (err) { 9846ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 9856ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9866ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 9876ce9e7b5SEric Dumazet err = 0; 9886ce9e7b5SEric Dumazet } 9896ce9e7b5SEric Dumazet } else 9906ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9916ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 992db8dac20SDavid S. Miller out: 993db8dac20SDavid S. Miller up->len = 0; 994db8dac20SDavid S. Miller up->pending = 0; 995db8dac20SDavid S. Miller return err; 996db8dac20SDavid S. Miller } 997db8dac20SDavid S. Miller 998db8dac20SDavid S. Miller int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, 999db8dac20SDavid S. Miller struct msghdr *msg, size_t len) 1000db8dac20SDavid S. Miller { 1001db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 1002db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 1003db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 1004db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 1005db8dac20SDavid S. Miller struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; 100620c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 1007db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 1008db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 10094c9483b2SDavid S. Miller struct flowi6 fl6; 1010db8dac20SDavid S. Miller struct dst_entry *dst; 1011db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 1012db8dac20SDavid S. Miller int ulen = len; 1013db8dac20SDavid S. Miller int hlimit = -1; 1014db8dac20SDavid S. Miller int tclass = -1; 101513b52cd4SBrian Haley int dontfrag = -1; 1016db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 1017db8dac20SDavid S. Miller int err; 1018db8dac20SDavid S. Miller int connected = 0; 1019db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 1020db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 1021db8dac20SDavid S. Miller 1022db8dac20SDavid S. Miller /* destination address check */ 1023db8dac20SDavid S. Miller if (sin6) { 1024db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 1025db8dac20SDavid S. Miller return -EINVAL; 1026db8dac20SDavid S. Miller 1027db8dac20SDavid S. Miller switch (sin6->sin6_family) { 1028db8dac20SDavid S. Miller case AF_INET6: 1029db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 1030db8dac20SDavid S. Miller return -EINVAL; 1031db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1032db8dac20SDavid S. Miller break; 1033db8dac20SDavid S. Miller case AF_INET: 1034db8dac20SDavid S. Miller goto do_udp_sendmsg; 1035db8dac20SDavid S. Miller case AF_UNSPEC: 1036db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 1037db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 1038db8dac20SDavid S. Miller daddr = NULL; 1039db8dac20SDavid S. Miller break; 1040db8dac20SDavid S. Miller default: 1041db8dac20SDavid S. Miller return -EINVAL; 1042db8dac20SDavid S. Miller } 1043db8dac20SDavid S. Miller } else if (!up->pending) { 1044db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1045db8dac20SDavid S. Miller return -EDESTADDRREQ; 1046db8dac20SDavid S. Miller daddr = &np->daddr; 1047db8dac20SDavid S. Miller } else 1048db8dac20SDavid S. Miller daddr = NULL; 1049db8dac20SDavid S. Miller 1050db8dac20SDavid S. Miller if (daddr) { 1051db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 1052db8dac20SDavid S. Miller struct sockaddr_in sin; 1053db8dac20SDavid S. Miller sin.sin_family = AF_INET; 1054c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 1055db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1056db8dac20SDavid S. Miller msg->msg_name = &sin; 1057db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 1058db8dac20SDavid S. Miller do_udp_sendmsg: 1059db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 1060db8dac20SDavid S. Miller return -ENETUNREACH; 1061db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1062db8dac20SDavid S. Miller } 1063db8dac20SDavid S. Miller } 1064db8dac20SDavid S. Miller 1065db8dac20SDavid S. Miller if (up->pending == AF_INET) 1066db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1067db8dac20SDavid S. Miller 1068db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1069db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1070db8dac20SDavid S. Miller */ 1071db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1072db8dac20SDavid S. Miller return -EMSGSIZE; 1073db8dac20SDavid S. Miller 1074db8dac20SDavid S. Miller if (up->pending) { 1075db8dac20SDavid S. Miller /* 1076db8dac20SDavid S. Miller * There are pending frames. 1077db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1078db8dac20SDavid S. Miller */ 1079db8dac20SDavid S. Miller lock_sock(sk); 1080db8dac20SDavid S. Miller if (likely(up->pending)) { 1081db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1082db8dac20SDavid S. Miller release_sock(sk); 1083db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1084db8dac20SDavid S. Miller } 1085db8dac20SDavid S. Miller dst = NULL; 1086db8dac20SDavid S. Miller goto do_append_data; 1087db8dac20SDavid S. Miller } 1088db8dac20SDavid S. Miller release_sock(sk); 1089db8dac20SDavid S. Miller } 1090db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1091db8dac20SDavid S. Miller 10924c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 1093db8dac20SDavid S. Miller 1094db8dac20SDavid S. Miller if (sin6) { 1095db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1096db8dac20SDavid S. Miller return -EINVAL; 1097db8dac20SDavid S. Miller 10981958b856SDavid S. Miller fl6.fl6_dport = sin6->sin6_port; 1099db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1100db8dac20SDavid S. Miller 1101db8dac20SDavid S. Miller if (np->sndflow) { 11024c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 11034c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 11044c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1105db8dac20SDavid S. Miller if (flowlabel == NULL) 1106db8dac20SDavid S. Miller return -EINVAL; 1107db8dac20SDavid S. Miller daddr = &flowlabel->dst; 1108db8dac20SDavid S. Miller } 1109db8dac20SDavid S. Miller } 1110db8dac20SDavid S. Miller 1111db8dac20SDavid S. Miller /* 1112db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1113db8dac20SDavid S. Miller * sk->sk_dst_cache. 1114db8dac20SDavid S. Miller */ 1115db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1116db8dac20SDavid S. Miller ipv6_addr_equal(daddr, &np->daddr)) 1117db8dac20SDavid S. Miller daddr = &np->daddr; 1118db8dac20SDavid S. Miller 1119db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1120db8dac20SDavid S. Miller sin6->sin6_scope_id && 1121db8dac20SDavid S. Miller ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) 11224c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 1123db8dac20SDavid S. Miller } else { 1124db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1125db8dac20SDavid S. Miller return -EDESTADDRREQ; 1126db8dac20SDavid S. Miller 11271958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 1128db8dac20SDavid S. Miller daddr = &np->daddr; 11294c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 1130db8dac20SDavid S. Miller connected = 1; 1131db8dac20SDavid S. Miller } 1132db8dac20SDavid S. Miller 11334c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11344c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 1135db8dac20SDavid S. Miller 11364c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11374c9483b2SDavid S. Miller fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 11389f690db7SYang Hongyang 11394c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 114051953d5bSBrian Haley 1141db8dac20SDavid S. Miller if (msg->msg_controllen) { 1142db8dac20SDavid S. Miller opt = &opt_space; 1143db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1144db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 1145db8dac20SDavid S. Miller 1146ec0506dbSMaciej Żenczykowski err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, 1147ec0506dbSMaciej Żenczykowski &hlimit, &tclass, &dontfrag); 1148db8dac20SDavid S. Miller if (err < 0) { 1149db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1150db8dac20SDavid S. Miller return err; 1151db8dac20SDavid S. Miller } 11524c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 11534c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1154db8dac20SDavid S. Miller if (flowlabel == NULL) 1155db8dac20SDavid S. Miller return -EINVAL; 1156db8dac20SDavid S. Miller } 1157db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1158db8dac20SDavid S. Miller opt = NULL; 1159db8dac20SDavid S. Miller connected = 0; 1160db8dac20SDavid S. Miller } 1161db8dac20SDavid S. Miller if (opt == NULL) 1162db8dac20SDavid S. Miller opt = np->opt; 1163db8dac20SDavid S. Miller if (flowlabel) 1164db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1165db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 1166db8dac20SDavid S. Miller 11674c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 1168876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 11694e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr; 1170876c7f41SBrian Haley else 11714c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 11724c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 11734e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 11741958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 1175db8dac20SDavid S. Miller 11764c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 117720c59de2SArnaud Ebalard if (final_p) 1178db8dac20SDavid S. Miller connected = 0; 1179db8dac20SDavid S. Miller 11804c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { 11814c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 1182db8dac20SDavid S. Miller connected = 0; 1183c4062dfcSErich E. Hoover } else if (!fl6.flowi6_oif) 1184c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif; 1185db8dac20SDavid S. Miller 11864c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 1187db8dac20SDavid S. Miller 11884c9483b2SDavid S. Miller dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); 118968d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 119068d0c6d3SDavid S. Miller err = PTR_ERR(dst); 119168d0c6d3SDavid S. Miller dst = NULL; 1192db8dac20SDavid S. Miller goto out; 1193db8dac20SDavid S. Miller } 1194db8dac20SDavid S. Miller 1195db8dac20SDavid S. Miller if (hlimit < 0) { 11964c9483b2SDavid S. Miller if (ipv6_addr_is_multicast(&fl6.daddr)) 1197db8dac20SDavid S. Miller hlimit = np->mcast_hops; 1198db8dac20SDavid S. Miller else 1199db8dac20SDavid S. Miller hlimit = np->hop_limit; 1200db8dac20SDavid S. Miller if (hlimit < 0) 12016b75d090SYOSHIFUJI Hideaki hlimit = ip6_dst_hoplimit(dst); 1202db8dac20SDavid S. Miller } 1203db8dac20SDavid S. Miller 1204db8dac20SDavid S. Miller if (tclass < 0) 1205e651f03aSGerrit Renker tclass = np->tclass; 1206db8dac20SDavid S. Miller 120713b52cd4SBrian Haley if (dontfrag < 0) 120813b52cd4SBrian Haley dontfrag = np->dontfrag; 120913b52cd4SBrian Haley 1210db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1211db8dac20SDavid S. Miller goto do_confirm; 1212db8dac20SDavid S. Miller back_from_confirm: 1213db8dac20SDavid S. Miller 1214db8dac20SDavid S. Miller lock_sock(sk); 1215db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1216db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1217db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1218db8dac20SDavid S. Miller release_sock(sk); 1219db8dac20SDavid S. Miller 1220db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); 1221db8dac20SDavid S. Miller err = -EINVAL; 1222db8dac20SDavid S. Miller goto out; 1223db8dac20SDavid S. Miller } 1224db8dac20SDavid S. Miller 1225db8dac20SDavid S. Miller up->pending = AF_INET6; 1226db8dac20SDavid S. Miller 1227db8dac20SDavid S. Miller do_append_data: 1228db8dac20SDavid S. Miller up->len += ulen; 1229db8dac20SDavid S. Miller getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1230db8dac20SDavid S. Miller err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, 12314c9483b2SDavid S. Miller sizeof(struct udphdr), hlimit, tclass, opt, &fl6, 1232db8dac20SDavid S. Miller (struct rt6_info*)dst, 123313b52cd4SBrian Haley corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); 1234db8dac20SDavid S. Miller if (err) 1235db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1236db8dac20SDavid S. Miller else if (!corkreq) 1237db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1238db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1239db8dac20SDavid S. Miller up->pending = 0; 1240db8dac20SDavid S. Miller 1241db8dac20SDavid S. Miller if (dst) { 1242db8dac20SDavid S. Miller if (connected) { 1243db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 12444c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.daddr, &np->daddr) ? 1245db8dac20SDavid S. Miller &np->daddr : NULL, 1246db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 12474c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1248db8dac20SDavid S. Miller &np->saddr : 1249db8dac20SDavid S. Miller #endif 1250db8dac20SDavid S. Miller NULL); 1251db8dac20SDavid S. Miller } else { 1252db8dac20SDavid S. Miller dst_release(dst); 1253db8dac20SDavid S. Miller } 1254a3c96089SYOSHIFUJI Hideaki dst = NULL; 1255db8dac20SDavid S. Miller } 1256db8dac20SDavid S. Miller 1257db8dac20SDavid S. Miller if (err > 0) 1258db8dac20SDavid S. Miller err = np->recverr ? net_xmit_errno(err) : 0; 1259db8dac20SDavid S. Miller release_sock(sk); 1260db8dac20SDavid S. Miller out: 1261a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1262db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1263db8dac20SDavid S. Miller if (!err) 1264db8dac20SDavid S. Miller return len; 1265db8dac20SDavid S. Miller /* 1266db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1267db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1268db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1269db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1270db8dac20SDavid S. Miller * seems like overkill. 1271db8dac20SDavid S. Miller */ 1272db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 1273235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 1274235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1275db8dac20SDavid S. Miller } 1276db8dac20SDavid S. Miller return err; 1277db8dac20SDavid S. Miller 1278db8dac20SDavid S. Miller do_confirm: 1279db8dac20SDavid S. Miller dst_confirm(dst); 1280db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1281db8dac20SDavid S. Miller goto back_from_confirm; 1282db8dac20SDavid S. Miller err = 0; 1283db8dac20SDavid S. Miller goto out; 1284db8dac20SDavid S. Miller } 1285db8dac20SDavid S. Miller 12867d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1287db8dac20SDavid S. Miller { 1288db8dac20SDavid S. Miller lock_sock(sk); 1289db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1290db8dac20SDavid S. Miller release_sock(sk); 1291db8dac20SDavid S. Miller 1292db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1293db8dac20SDavid S. Miller } 1294db8dac20SDavid S. Miller 1295db8dac20SDavid S. Miller /* 1296db8dac20SDavid S. Miller * Socket option code for UDP 1297db8dac20SDavid S. Miller */ 1298db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1299b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1300db8dac20SDavid S. Miller { 1301db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1302db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1303db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1304db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1305db8dac20SDavid S. Miller } 1306db8dac20SDavid S. Miller 1307db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1308db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1309b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1310db8dac20SDavid S. Miller { 1311db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1312db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1313db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1314db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1315db8dac20SDavid S. Miller } 1316db8dac20SDavid S. Miller #endif 1317db8dac20SDavid S. Miller 1318db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1319db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1320db8dac20SDavid S. Miller { 1321db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1322db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1323db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1324db8dac20SDavid S. Miller } 1325db8dac20SDavid S. Miller 1326db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1327db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1328db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1329db8dac20SDavid S. Miller { 1330db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1331db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1332db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1333db8dac20SDavid S. Miller } 1334db8dac20SDavid S. Miller #endif 1335db8dac20SDavid S. Miller 133641135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1337db8dac20SDavid S. Miller .handler = udpv6_rcv, 1338db8dac20SDavid S. Miller .err_handler = udpv6_err, 1339db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1340db8dac20SDavid S. Miller }; 1341db8dac20SDavid S. Miller 1342db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1343db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1344db8dac20SDavid S. Miller 1345db8dac20SDavid S. Miller static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) 1346db8dac20SDavid S. Miller { 1347db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sp); 1348db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sp); 1349b71d1d42SEric Dumazet const struct in6_addr *dest, *src; 1350db8dac20SDavid S. Miller __u16 destp, srcp; 1351db8dac20SDavid S. Miller 1352db8dac20SDavid S. Miller dest = &np->daddr; 1353db8dac20SDavid S. Miller src = &np->rcv_saddr; 1354c720c7e8SEric Dumazet destp = ntohs(inet->inet_dport); 1355c720c7e8SEric Dumazet srcp = ntohs(inet->inet_sport); 1356db8dac20SDavid S. Miller seq_printf(seq, 1357f86dcc5aSEric Dumazet "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 135871338aa7SDan Rosenberg "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", 1359db8dac20SDavid S. Miller bucket, 1360db8dac20SDavid S. Miller src->s6_addr32[0], src->s6_addr32[1], 1361db8dac20SDavid S. Miller src->s6_addr32[2], src->s6_addr32[3], srcp, 1362db8dac20SDavid S. Miller dest->s6_addr32[0], dest->s6_addr32[1], 1363db8dac20SDavid S. Miller dest->s6_addr32[2], dest->s6_addr32[3], destp, 1364db8dac20SDavid S. Miller sp->sk_state, 136531e6d363SEric Dumazet sk_wmem_alloc_get(sp), 136631e6d363SEric Dumazet sk_rmem_alloc_get(sp), 1367db8dac20SDavid S. Miller 0, 0L, 0, 1368a7cb5a49SEric W. Biederman from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 1369a7cb5a49SEric W. Biederman 0, 1370db8dac20SDavid S. Miller sock_i_ino(sp), 1371cb61cb9bSEric Dumazet atomic_read(&sp->sk_refcnt), sp, 1372cb61cb9bSEric Dumazet atomic_read(&sp->sk_drops)); 1373db8dac20SDavid S. Miller } 1374db8dac20SDavid S. Miller 1375db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1376db8dac20SDavid S. Miller { 1377db8dac20SDavid S. Miller if (v == SEQ_START_TOKEN) 1378db8dac20SDavid S. Miller seq_printf(seq, 1379db8dac20SDavid S. Miller " sl " 1380db8dac20SDavid S. Miller "local_address " 1381db8dac20SDavid S. Miller "remote_address " 1382db8dac20SDavid S. Miller "st tx_queue rx_queue tr tm->when retrnsmt" 1383cb61cb9bSEric Dumazet " uid timeout inode ref pointer drops\n"); 1384db8dac20SDavid S. Miller else 1385db8dac20SDavid S. Miller udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); 1386db8dac20SDavid S. Miller return 0; 1387db8dac20SDavid S. Miller } 1388db8dac20SDavid S. Miller 138973cb88ecSArjan van de Ven static const struct file_operations udp6_afinfo_seq_fops = { 139073cb88ecSArjan van de Ven .owner = THIS_MODULE, 139173cb88ecSArjan van de Ven .open = udp_seq_open, 139273cb88ecSArjan van de Ven .read = seq_read, 139373cb88ecSArjan van de Ven .llseek = seq_lseek, 139473cb88ecSArjan van de Ven .release = seq_release_net 139573cb88ecSArjan van de Ven }; 139673cb88ecSArjan van de Ven 1397db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1398db8dac20SDavid S. Miller .name = "udp6", 1399db8dac20SDavid S. Miller .family = AF_INET6, 1400645ca708SEric Dumazet .udp_table = &udp_table, 140173cb88ecSArjan van de Ven .seq_fops = &udp6_afinfo_seq_fops, 1402dda61925SDenis V. Lunev .seq_ops = { 1403dda61925SDenis V. Lunev .show = udp6_seq_show, 1404dda61925SDenis V. Lunev }, 1405db8dac20SDavid S. Miller }; 1406db8dac20SDavid S. Miller 14072c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1408db8dac20SDavid S. Miller { 14090c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1410db8dac20SDavid S. Miller } 1411db8dac20SDavid S. Miller 14120c96d8c5SDaniel Lezcano void udp6_proc_exit(struct net *net) { 14130c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1414db8dac20SDavid S. Miller } 1415db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1416db8dac20SDavid S. Miller 1417db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1418db8dac20SDavid S. Miller 1419db8dac20SDavid S. Miller struct proto udpv6_prot = { 1420db8dac20SDavid S. Miller .name = "UDPv6", 1421db8dac20SDavid S. Miller .owner = THIS_MODULE, 1422db8dac20SDavid S. Miller .close = udp_lib_close, 1423db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1424db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1425db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1426db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1427db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1428db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1429db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1430db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1431f7ad74feSBenjamin LaHaise .backlog_rcv = __udpv6_queue_rcv_skb, 1432db8dac20SDavid S. Miller .hash = udp_lib_hash, 1433db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1434719f8358SEric Dumazet .rehash = udp_v6_rehash, 1435db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1436db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1437db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1438db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1439db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1440db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1441271b72c7SEric Dumazet .slab_flags = SLAB_DESTROY_BY_RCU, 1442645ca708SEric Dumazet .h.udp_table = &udp_table, 1443db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1444db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1445db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1446db8dac20SDavid S. Miller #endif 1447fcbdf09dSOctavian Purdila .clear_sk = sk_prot_clear_portaddr_nulls, 1448db8dac20SDavid S. Miller }; 1449db8dac20SDavid S. Miller 1450db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1451db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1452db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1453db8dac20SDavid S. Miller .prot = &udpv6_prot, 1454db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1455db8dac20SDavid S. Miller .no_check = UDP_CSUM_DEFAULT, 1456db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1457db8dac20SDavid S. Miller }; 1458db8dac20SDavid S. Miller 1459db8dac20SDavid S. Miller 1460db8dac20SDavid S. Miller int __init udpv6_init(void) 1461db8dac20SDavid S. Miller { 1462db8dac20SDavid S. Miller int ret; 1463db8dac20SDavid S. Miller 14643336288aSVlad Yasevich ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 14653336288aSVlad Yasevich if (ret) 1466c6b641a4SVlad Yasevich goto out; 14673336288aSVlad Yasevich 1468db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1469db8dac20SDavid S. Miller if (ret) 1470db8dac20SDavid S. Miller goto out_udpv6_protocol; 1471db8dac20SDavid S. Miller out: 1472db8dac20SDavid S. Miller return ret; 1473db8dac20SDavid S. Miller 1474db8dac20SDavid S. Miller out_udpv6_protocol: 1475db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1476db8dac20SDavid S. Miller goto out; 1477db8dac20SDavid S. Miller } 1478db8dac20SDavid S. Miller 1479db8dac20SDavid S. Miller void udpv6_exit(void) 1480db8dac20SDavid S. Miller { 1481db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1482db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1483db8dac20SDavid S. Miller } 1484