1db8dac20SDavid S. Miller /* 2db8dac20SDavid S. Miller * UDP over IPv6 3db8dac20SDavid S. Miller * Linux INET6 implementation 4db8dac20SDavid S. Miller * 5db8dac20SDavid S. Miller * Authors: 6db8dac20SDavid S. Miller * Pedro Roque <roque@di.fc.ul.pt> 7db8dac20SDavid S. Miller * 8db8dac20SDavid S. Miller * Based on linux/ipv4/udp.c 9db8dac20SDavid S. Miller * 10db8dac20SDavid S. Miller * Fixes: 11db8dac20SDavid S. Miller * Hideaki YOSHIFUJI : sin6_scope_id support 12db8dac20SDavid S. Miller * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which 13db8dac20SDavid S. Miller * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind 14db8dac20SDavid S. Miller * a single port at the same time. 15db8dac20SDavid S. Miller * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data 16db8dac20SDavid S. Miller * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. 17db8dac20SDavid S. Miller * 18db8dac20SDavid S. Miller * This program is free software; you can redistribute it and/or 19db8dac20SDavid S. Miller * modify it under the terms of the GNU General Public License 20db8dac20SDavid S. Miller * as published by the Free Software Foundation; either version 21db8dac20SDavid S. Miller * 2 of the License, or (at your option) any later version. 22db8dac20SDavid S. Miller */ 23db8dac20SDavid S. Miller 24db8dac20SDavid S. Miller #include <linux/errno.h> 25db8dac20SDavid S. Miller #include <linux/types.h> 26db8dac20SDavid S. Miller #include <linux/socket.h> 27db8dac20SDavid S. Miller #include <linux/sockios.h> 28db8dac20SDavid S. Miller #include <linux/net.h> 29db8dac20SDavid S. Miller #include <linux/in6.h> 30db8dac20SDavid S. Miller #include <linux/netdevice.h> 31db8dac20SDavid S. Miller #include <linux/if_arp.h> 32db8dac20SDavid S. Miller #include <linux/ipv6.h> 33db8dac20SDavid S. Miller #include <linux/icmpv6.h> 34db8dac20SDavid S. Miller #include <linux/init.h> 35db8dac20SDavid S. Miller #include <linux/module.h> 36db8dac20SDavid S. Miller #include <linux/skbuff.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 38db8dac20SDavid S. Miller #include <asm/uaccess.h> 39db8dac20SDavid S. Miller 40db8dac20SDavid S. Miller #include <net/ndisc.h> 41db8dac20SDavid S. Miller #include <net/protocol.h> 42db8dac20SDavid S. Miller #include <net/transp_v6.h> 43db8dac20SDavid S. Miller #include <net/ip6_route.h> 44db8dac20SDavid S. Miller #include <net/raw.h> 45db8dac20SDavid S. Miller #include <net/tcp_states.h> 46db8dac20SDavid S. Miller #include <net/ip6_checksum.h> 47db8dac20SDavid S. Miller #include <net/xfrm.h> 48db8dac20SDavid S. Miller 49db8dac20SDavid S. Miller #include <linux/proc_fs.h> 50db8dac20SDavid S. Miller #include <linux/seq_file.h> 5122911fc5SEric Dumazet #include <trace/events/skb.h> 52db8dac20SDavid S. Miller #include "udp_impl.h" 53db8dac20SDavid S. Miller 54b2f5e7cdSVlad Yasevich int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) 55b2f5e7cdSVlad Yasevich { 56b2f5e7cdSVlad Yasevich const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; 57b2f5e7cdSVlad Yasevich const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); 5868835abaSEric Dumazet __be32 sk1_rcv_saddr = sk_rcv_saddr(sk); 5968835abaSEric Dumazet __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2); 60b2f5e7cdSVlad Yasevich int sk_ipv6only = ipv6_only_sock(sk); 61b2f5e7cdSVlad Yasevich int sk2_ipv6only = inet_v6_ipv6only(sk2); 62b2f5e7cdSVlad Yasevich int addr_type = ipv6_addr_type(sk_rcv_saddr6); 63b2f5e7cdSVlad Yasevich int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; 64b2f5e7cdSVlad Yasevich 65b2f5e7cdSVlad Yasevich /* if both are mapped, treat as IPv4 */ 66b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) 67499923c7SVlad Yasevich return (!sk2_ipv6only && 68c720c7e8SEric Dumazet (!sk1_rcv_saddr || !sk2_rcv_saddr || 69c720c7e8SEric Dumazet sk1_rcv_saddr == sk2_rcv_saddr)); 70b2f5e7cdSVlad Yasevich 71b2f5e7cdSVlad Yasevich if (addr_type2 == IPV6_ADDR_ANY && 72b2f5e7cdSVlad Yasevich !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) 73b2f5e7cdSVlad Yasevich return 1; 74b2f5e7cdSVlad Yasevich 75b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_ANY && 76b2f5e7cdSVlad Yasevich !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) 77b2f5e7cdSVlad Yasevich return 1; 78b2f5e7cdSVlad Yasevich 79b2f5e7cdSVlad Yasevich if (sk2_rcv_saddr6 && 80b2f5e7cdSVlad Yasevich ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) 81b2f5e7cdSVlad Yasevich return 1; 82b2f5e7cdSVlad Yasevich 83b2f5e7cdSVlad Yasevich return 0; 84b2f5e7cdSVlad Yasevich } 85b2f5e7cdSVlad Yasevich 86d4cada4aSEric Dumazet static unsigned int udp6_portaddr_hash(struct net *net, 87d4cada4aSEric Dumazet const struct in6_addr *addr6, 88d4cada4aSEric Dumazet unsigned int port) 89d4cada4aSEric Dumazet { 90d4cada4aSEric Dumazet unsigned int hash, mix = net_hash_mix(net); 91d4cada4aSEric Dumazet 92d4cada4aSEric Dumazet if (ipv6_addr_any(addr6)) 93d4cada4aSEric Dumazet hash = jhash_1word(0, mix); 94856540eeSBrian Haley else if (ipv6_addr_v4mapped(addr6)) 950eae88f3SEric Dumazet hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); 96d4cada4aSEric Dumazet else 970eae88f3SEric Dumazet hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); 98d4cada4aSEric Dumazet 99d4cada4aSEric Dumazet return hash ^ port; 100d4cada4aSEric Dumazet } 101d4cada4aSEric Dumazet 102d4cada4aSEric Dumazet 1036ba5a3c5SPavel Emelyanov int udp_v6_get_port(struct sock *sk, unsigned short snum) 104db8dac20SDavid S. Miller { 10530fff923SEric Dumazet unsigned int hash2_nulladdr = 10630fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); 10730fff923SEric Dumazet unsigned int hash2_partial = 10830fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0); 10930fff923SEric Dumazet 110d4cada4aSEric Dumazet /* precompute partial secondary hash */ 11130fff923SEric Dumazet udp_sk(sk)->udp_portaddr_hash = hash2_partial; 11230fff923SEric Dumazet return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); 113db8dac20SDavid S. Miller } 114db8dac20SDavid S. Miller 115719f8358SEric Dumazet static void udp_v6_rehash(struct sock *sk) 116719f8358SEric Dumazet { 117719f8358SEric Dumazet u16 new_hash = udp6_portaddr_hash(sock_net(sk), 118719f8358SEric Dumazet &inet6_sk(sk)->rcv_saddr, 119719f8358SEric Dumazet inet_sk(sk)->inet_num); 120719f8358SEric Dumazet 121719f8358SEric Dumazet udp_lib_rehash(sk, new_hash); 122719f8358SEric Dumazet } 123719f8358SEric Dumazet 124645ca708SEric Dumazet static inline int compute_score(struct sock *sk, struct net *net, 125645ca708SEric Dumazet unsigned short hnum, 12688440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 12788440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 128645ca708SEric Dumazet int dif) 129db8dac20SDavid S. Miller { 130645ca708SEric Dumazet int score = -1; 131db8dac20SDavid S. Miller 132d4cada4aSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 133db8dac20SDavid S. Miller sk->sk_family == PF_INET6) { 134db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 135645ca708SEric Dumazet struct inet_sock *inet = inet_sk(sk); 136645ca708SEric Dumazet 137645ca708SEric Dumazet score = 0; 138c720c7e8SEric Dumazet if (inet->inet_dport) { 139c720c7e8SEric Dumazet if (inet->inet_dport != sport) 140645ca708SEric Dumazet return -1; 141db8dac20SDavid S. Miller score++; 142db8dac20SDavid S. Miller } 143db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 144db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) 145645ca708SEric Dumazet return -1; 146db8dac20SDavid S. Miller score++; 147db8dac20SDavid S. Miller } 148db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr)) { 149db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->daddr, saddr)) 150645ca708SEric Dumazet return -1; 151db8dac20SDavid S. Miller score++; 152db8dac20SDavid S. Miller } 153db8dac20SDavid S. Miller if (sk->sk_bound_dev_if) { 154db8dac20SDavid S. Miller if (sk->sk_bound_dev_if != dif) 155645ca708SEric Dumazet return -1; 156db8dac20SDavid S. Miller score++; 157db8dac20SDavid S. Miller } 158645ca708SEric Dumazet } 159645ca708SEric Dumazet return score; 160645ca708SEric Dumazet } 161645ca708SEric Dumazet 162fddc17deSEric Dumazet #define SCORE2_MAX (1 + 1 + 1) 163fddc17deSEric Dumazet static inline int compute_score2(struct sock *sk, struct net *net, 164fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 165fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned short hnum, 166fddc17deSEric Dumazet int dif) 167fddc17deSEric Dumazet { 168fddc17deSEric Dumazet int score = -1; 169fddc17deSEric Dumazet 170fddc17deSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 171fddc17deSEric Dumazet sk->sk_family == PF_INET6) { 172fddc17deSEric Dumazet struct ipv6_pinfo *np = inet6_sk(sk); 173fddc17deSEric Dumazet struct inet_sock *inet = inet_sk(sk); 174fddc17deSEric Dumazet 175fddc17deSEric Dumazet if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) 176fddc17deSEric Dumazet return -1; 177fddc17deSEric Dumazet score = 0; 178fddc17deSEric Dumazet if (inet->inet_dport) { 179fddc17deSEric Dumazet if (inet->inet_dport != sport) 180fddc17deSEric Dumazet return -1; 181fddc17deSEric Dumazet score++; 182fddc17deSEric Dumazet } 183fddc17deSEric Dumazet if (!ipv6_addr_any(&np->daddr)) { 184fddc17deSEric Dumazet if (!ipv6_addr_equal(&np->daddr, saddr)) 185fddc17deSEric Dumazet return -1; 186fddc17deSEric Dumazet score++; 187fddc17deSEric Dumazet } 188fddc17deSEric Dumazet if (sk->sk_bound_dev_if) { 189fddc17deSEric Dumazet if (sk->sk_bound_dev_if != dif) 190fddc17deSEric Dumazet return -1; 191fddc17deSEric Dumazet score++; 192fddc17deSEric Dumazet } 193fddc17deSEric Dumazet } 194fddc17deSEric Dumazet return score; 195fddc17deSEric Dumazet } 196fddc17deSEric Dumazet 197fddc17deSEric Dumazet 198fddc17deSEric Dumazet /* called with read_rcu_lock() */ 199fddc17deSEric Dumazet static struct sock *udp6_lib_lookup2(struct net *net, 200fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 201fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned int hnum, int dif, 202fddc17deSEric Dumazet struct udp_hslot *hslot2, unsigned int slot2) 203fddc17deSEric Dumazet { 204fddc17deSEric Dumazet struct sock *sk, *result; 205fddc17deSEric Dumazet struct hlist_nulls_node *node; 206fddc17deSEric Dumazet int score, badness; 207fddc17deSEric Dumazet 208fddc17deSEric Dumazet begin: 209fddc17deSEric Dumazet result = NULL; 210fddc17deSEric Dumazet badness = -1; 211fddc17deSEric Dumazet udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { 212fddc17deSEric Dumazet score = compute_score2(sk, net, saddr, sport, 213fddc17deSEric Dumazet daddr, hnum, dif); 214fddc17deSEric Dumazet if (score > badness) { 215fddc17deSEric Dumazet result = sk; 216fddc17deSEric Dumazet badness = score; 217fddc17deSEric Dumazet if (score == SCORE2_MAX) 218fddc17deSEric Dumazet goto exact_match; 219fddc17deSEric Dumazet } 220fddc17deSEric Dumazet } 221fddc17deSEric Dumazet /* 222fddc17deSEric Dumazet * if the nulls value we got at the end of this lookup is 223fddc17deSEric Dumazet * not the expected one, we must restart lookup. 224fddc17deSEric Dumazet * We probably met an item that was moved to another chain. 225fddc17deSEric Dumazet */ 226fddc17deSEric Dumazet if (get_nulls_value(node) != slot2) 227fddc17deSEric Dumazet goto begin; 228fddc17deSEric Dumazet 229fddc17deSEric Dumazet if (result) { 230fddc17deSEric Dumazet exact_match: 231c31504dcSEric Dumazet if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) 232fddc17deSEric Dumazet result = NULL; 233fddc17deSEric Dumazet else if (unlikely(compute_score2(result, net, saddr, sport, 234fddc17deSEric Dumazet daddr, hnum, dif) < badness)) { 235fddc17deSEric Dumazet sock_put(result); 236fddc17deSEric Dumazet goto begin; 237fddc17deSEric Dumazet } 238fddc17deSEric Dumazet } 239fddc17deSEric Dumazet return result; 240fddc17deSEric Dumazet } 241fddc17deSEric Dumazet 242fce82338SPavel Emelyanov struct sock *__udp6_lib_lookup(struct net *net, 24388440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 24488440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 245645ca708SEric Dumazet int dif, struct udp_table *udptable) 246645ca708SEric Dumazet { 247271b72c7SEric Dumazet struct sock *sk, *result; 24888ab1932SEric Dumazet struct hlist_nulls_node *node; 249645ca708SEric Dumazet unsigned short hnum = ntohs(dport); 250fddc17deSEric Dumazet unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); 251fddc17deSEric Dumazet struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; 252271b72c7SEric Dumazet int score, badness; 253645ca708SEric Dumazet 254271b72c7SEric Dumazet rcu_read_lock(); 255fddc17deSEric Dumazet if (hslot->count > 10) { 256fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, daddr, hnum); 257fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 258fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 259fddc17deSEric Dumazet if (hslot->count < hslot2->count) 260fddc17deSEric Dumazet goto begin; 261fddc17deSEric Dumazet 262fddc17deSEric Dumazet result = udp6_lib_lookup2(net, saddr, sport, 263fddc17deSEric Dumazet daddr, hnum, dif, 264fddc17deSEric Dumazet hslot2, slot2); 265fddc17deSEric Dumazet if (!result) { 266fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); 267fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 268fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 269fddc17deSEric Dumazet if (hslot->count < hslot2->count) 270fddc17deSEric Dumazet goto begin; 271fddc17deSEric Dumazet 2721223c67cSJorge Boncompte [DTI2] result = udp6_lib_lookup2(net, saddr, sport, 2731223c67cSJorge Boncompte [DTI2] &in6addr_any, hnum, dif, 274fddc17deSEric Dumazet hslot2, slot2); 275fddc17deSEric Dumazet } 276fddc17deSEric Dumazet rcu_read_unlock(); 277fddc17deSEric Dumazet return result; 278fddc17deSEric Dumazet } 279271b72c7SEric Dumazet begin: 280271b72c7SEric Dumazet result = NULL; 281271b72c7SEric Dumazet badness = -1; 28288ab1932SEric Dumazet sk_nulls_for_each_rcu(sk, node, &hslot->head) { 283645ca708SEric Dumazet score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); 284645ca708SEric Dumazet if (score > badness) { 285db8dac20SDavid S. Miller result = sk; 286db8dac20SDavid S. Miller badness = score; 287db8dac20SDavid S. Miller } 288db8dac20SDavid S. Miller } 28988ab1932SEric Dumazet /* 29088ab1932SEric Dumazet * if the nulls value we got at the end of this lookup is 29188ab1932SEric Dumazet * not the expected one, we must restart lookup. 29288ab1932SEric Dumazet * We probably met an item that was moved to another chain. 29388ab1932SEric Dumazet */ 294fddc17deSEric Dumazet if (get_nulls_value(node) != slot) 29588ab1932SEric Dumazet goto begin; 29688ab1932SEric Dumazet 297271b72c7SEric Dumazet if (result) { 298c31504dcSEric Dumazet if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) 299271b72c7SEric Dumazet result = NULL; 300271b72c7SEric Dumazet else if (unlikely(compute_score(result, net, hnum, saddr, sport, 301271b72c7SEric Dumazet daddr, dport, dif) < badness)) { 302271b72c7SEric Dumazet sock_put(result); 303271b72c7SEric Dumazet goto begin; 304271b72c7SEric Dumazet } 305271b72c7SEric Dumazet } 306271b72c7SEric Dumazet rcu_read_unlock(); 307db8dac20SDavid S. Miller return result; 308db8dac20SDavid S. Miller } 309fce82338SPavel Emelyanov EXPORT_SYMBOL_GPL(__udp6_lib_lookup); 310db8dac20SDavid S. Miller 311607c4aafSKOVACS Krisztian static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, 312607c4aafSKOVACS Krisztian __be16 sport, __be16 dport, 313645ca708SEric Dumazet struct udp_table *udptable) 314607c4aafSKOVACS Krisztian { 31523542618SKOVACS Krisztian struct sock *sk; 316b71d1d42SEric Dumazet const struct ipv6hdr *iph = ipv6_hdr(skb); 317607c4aafSKOVACS Krisztian 31823542618SKOVACS Krisztian if (unlikely(sk = skb_steal_sock(skb))) 31923542618SKOVACS Krisztian return sk; 320adf30907SEric Dumazet return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, 321607c4aafSKOVACS Krisztian &iph->daddr, dport, inet6_iif(skb), 322607c4aafSKOVACS Krisztian udptable); 323607c4aafSKOVACS Krisztian } 324607c4aafSKOVACS Krisztian 325aa976fc0SBalazs Scheidler struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, 326aa976fc0SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, int dif) 327aa976fc0SBalazs Scheidler { 328aa976fc0SBalazs Scheidler return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); 329aa976fc0SBalazs Scheidler } 330aa976fc0SBalazs Scheidler EXPORT_SYMBOL_GPL(udp6_lib_lookup); 331aa976fc0SBalazs Scheidler 332aa976fc0SBalazs Scheidler 333db8dac20SDavid S. Miller /* 334db8dac20SDavid S. Miller * This should be easy, if there is something there we 335db8dac20SDavid S. Miller * return it, otherwise we block. 336db8dac20SDavid S. Miller */ 337db8dac20SDavid S. Miller 338db8dac20SDavid S. Miller int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, 339db8dac20SDavid S. Miller struct msghdr *msg, size_t len, 340db8dac20SDavid S. Miller int noblock, int flags, int *addr_len) 341db8dac20SDavid S. Miller { 342db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 343db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 344db8dac20SDavid S. Miller struct sk_buff *skb; 34559c2cdaeSDavid S. Miller unsigned int ulen, copied; 3463f518bf7SPavel Emelyanov int peeked, off = 0; 347db8dac20SDavid S. Miller int err; 348db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 349f26ba175SWei Yongjun int is_udp4; 3508a74ad60SEric Dumazet bool slow; 351db8dac20SDavid S. Miller 352db8dac20SDavid S. Miller if (addr_len) 353db8dac20SDavid S. Miller *addr_len = sizeof(struct sockaddr_in6); 354db8dac20SDavid S. Miller 355db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 356db8dac20SDavid S. Miller return ipv6_recv_error(sk, msg, len); 357db8dac20SDavid S. Miller 3584b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 3594b340ae2SBrian Haley return ipv6_recv_rxpmtu(sk, msg, len); 3604b340ae2SBrian Haley 361db8dac20SDavid S. Miller try_again: 362db8dac20SDavid S. Miller skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), 3633f518bf7SPavel Emelyanov &peeked, &off, &err); 364db8dac20SDavid S. Miller if (!skb) 365db8dac20SDavid S. Miller goto out; 366db8dac20SDavid S. Miller 367db8dac20SDavid S. Miller ulen = skb->len - sizeof(struct udphdr); 36859c2cdaeSDavid S. Miller copied = len; 36959c2cdaeSDavid S. Miller if (copied > ulen) 37059c2cdaeSDavid S. Miller copied = ulen; 37159c2cdaeSDavid S. Miller else if (copied < ulen) 372db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 373db8dac20SDavid S. Miller 374f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 375f26ba175SWei Yongjun 376db8dac20SDavid S. Miller /* 377db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 378db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 379db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 380db8dac20SDavid S. Miller */ 381db8dac20SDavid S. Miller 38259c2cdaeSDavid S. Miller if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { 383db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 384db8dac20SDavid S. Miller goto csum_copy_err; 385db8dac20SDavid S. Miller } 386db8dac20SDavid S. Miller 387db8dac20SDavid S. Miller if (skb_csum_unnecessary(skb)) 388db8dac20SDavid S. Miller err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), 38959c2cdaeSDavid S. Miller msg->msg_iov, copied); 390db8dac20SDavid S. Miller else { 391db8dac20SDavid S. Miller err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); 392db8dac20SDavid S. Miller if (err == -EINVAL) 393db8dac20SDavid S. Miller goto csum_copy_err; 394db8dac20SDavid S. Miller } 39522911fc5SEric Dumazet if (unlikely(err)) { 39622911fc5SEric Dumazet trace_kfree_skb(skb, udpv6_recvmsg); 397979402b1SEric Dumazet if (!peeked) { 398979402b1SEric Dumazet atomic_inc(&sk->sk_drops); 399979402b1SEric Dumazet if (is_udp4) 400979402b1SEric Dumazet UDP_INC_STATS_USER(sock_net(sk), 401979402b1SEric Dumazet UDP_MIB_INERRORS, 402979402b1SEric Dumazet is_udplite); 403979402b1SEric Dumazet else 404979402b1SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 405979402b1SEric Dumazet UDP_MIB_INERRORS, 406979402b1SEric Dumazet is_udplite); 407979402b1SEric Dumazet } 408db8dac20SDavid S. Miller goto out_free; 40922911fc5SEric Dumazet } 410f26ba175SWei Yongjun if (!peeked) { 411f26ba175SWei Yongjun if (is_udp4) 412f26ba175SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 413f26ba175SWei Yongjun UDP_MIB_INDATAGRAMS, is_udplite); 414f26ba175SWei Yongjun else 415235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 416235b9f7aSPavel Emelyanov UDP_MIB_INDATAGRAMS, is_udplite); 417f26ba175SWei Yongjun } 418db8dac20SDavid S. Miller 4193b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 420db8dac20SDavid S. Miller 421db8dac20SDavid S. Miller /* Copy the address. */ 422db8dac20SDavid S. Miller if (msg->msg_name) { 423db8dac20SDavid S. Miller struct sockaddr_in6 *sin6; 424db8dac20SDavid S. Miller 425db8dac20SDavid S. Miller sin6 = (struct sockaddr_in6 *) msg->msg_name; 426db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 427db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 428db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 429db8dac20SDavid S. Miller sin6->sin6_scope_id = 0; 430db8dac20SDavid S. Miller 431f26ba175SWei Yongjun if (is_udp4) 432b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 433b301e82cSBrian Haley &sin6->sin6_addr); 434db8dac20SDavid S. Miller else { 4354e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr; 436db8dac20SDavid S. Miller if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 437db8dac20SDavid S. Miller sin6->sin6_scope_id = IP6CB(skb)->iif; 438db8dac20SDavid S. Miller } 439db8dac20SDavid S. Miller 440db8dac20SDavid S. Miller } 441f26ba175SWei Yongjun if (is_udp4) { 442db8dac20SDavid S. Miller if (inet->cmsg_flags) 443db8dac20SDavid S. Miller ip_cmsg_recv(msg, skb); 444db8dac20SDavid S. Miller } else { 445db8dac20SDavid S. Miller if (np->rxopt.all) 44673df66f8STom Parkin ip6_datagram_recv_ctl(sk, msg, skb); 447db8dac20SDavid S. Miller } 448db8dac20SDavid S. Miller 44959c2cdaeSDavid S. Miller err = copied; 450db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 451db8dac20SDavid S. Miller err = ulen; 452db8dac20SDavid S. Miller 453db8dac20SDavid S. Miller out_free: 4549d410c79SEric Dumazet skb_free_datagram_locked(sk, skb); 455db8dac20SDavid S. Miller out: 456db8dac20SDavid S. Miller return err; 457db8dac20SDavid S. Miller 458db8dac20SDavid S. Miller csum_copy_err: 4598a74ad60SEric Dumazet slow = lock_sock_fast(sk); 4600856f939SWei Yongjun if (!skb_kill_datagram(sk, skb, flags)) { 4610856f939SWei Yongjun if (is_udp4) 4620856f939SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 4630856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4640856f939SWei Yongjun else 4650856f939SWei Yongjun UDP6_INC_STATS_USER(sock_net(sk), 4660856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4670856f939SWei Yongjun } 4688a74ad60SEric Dumazet unlock_sock_fast(sk, slow); 469db8dac20SDavid S. Miller 47032c90254SXufeng Zhang if (noblock) 471db8dac20SDavid S. Miller return -EAGAIN; 4729cfaa8deSXufeng Zhang 4739cfaa8deSXufeng Zhang /* starting over for a new packet */ 4749cfaa8deSXufeng Zhang msg->msg_flags &= ~MSG_TRUNC; 475db8dac20SDavid S. Miller goto try_again; 476db8dac20SDavid S. Miller } 477db8dac20SDavid S. Miller 478db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 479d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 480645ca708SEric Dumazet struct udp_table *udptable) 481db8dac20SDavid S. Miller { 482db8dac20SDavid S. Miller struct ipv6_pinfo *np; 483b71d1d42SEric Dumazet const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; 484b71d1d42SEric Dumazet const struct in6_addr *saddr = &hdr->saddr; 485b71d1d42SEric Dumazet const struct in6_addr *daddr = &hdr->daddr; 486db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr*)(skb->data+offset); 487db8dac20SDavid S. Miller struct sock *sk; 488db8dac20SDavid S. Miller int err; 489db8dac20SDavid S. Miller 490c346dca1SYOSHIFUJI Hideaki sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, 491db8dac20SDavid S. Miller saddr, uh->source, inet6_iif(skb), udptable); 492db8dac20SDavid S. Miller if (sk == NULL) 493db8dac20SDavid S. Miller return; 494db8dac20SDavid S. Miller 49581aded24SDavid S. Miller if (type == ICMPV6_PKT_TOOBIG) 49681aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info); 497ec18d9a2SDavid S. Miller if (type == NDISC_REDIRECT) 498ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk); 49981aded24SDavid S. Miller 500db8dac20SDavid S. Miller np = inet6_sk(sk); 501db8dac20SDavid S. Miller 502db8dac20SDavid S. Miller if (!icmpv6_err_convert(type, code, &err) && !np->recverr) 503db8dac20SDavid S. Miller goto out; 504db8dac20SDavid S. Miller 505db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) 506db8dac20SDavid S. Miller goto out; 507db8dac20SDavid S. Miller 508b1faf566SEric Dumazet if (np->recverr) 509db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 510b1faf566SEric Dumazet 511db8dac20SDavid S. Miller sk->sk_err = err; 512db8dac20SDavid S. Miller sk->sk_error_report(sk); 513db8dac20SDavid S. Miller out: 514db8dac20SDavid S. Miller sock_put(sk); 515db8dac20SDavid S. Miller } 516db8dac20SDavid S. Miller 517f7ad74feSBenjamin LaHaise static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 518f7ad74feSBenjamin LaHaise { 519f7ad74feSBenjamin LaHaise int rc; 520f7ad74feSBenjamin LaHaise 521f7ad74feSBenjamin LaHaise if (!ipv6_addr_any(&inet6_sk(sk)->daddr)) 522f7ad74feSBenjamin LaHaise sock_rps_save_rxhash(sk, skb); 523f7ad74feSBenjamin LaHaise 524f7ad74feSBenjamin LaHaise rc = sock_queue_rcv_skb(sk, skb); 525f7ad74feSBenjamin LaHaise if (rc < 0) { 526f7ad74feSBenjamin LaHaise int is_udplite = IS_UDPLITE(sk); 527f7ad74feSBenjamin LaHaise 528f7ad74feSBenjamin LaHaise /* Note that an ENOMEM error is charged twice */ 529f7ad74feSBenjamin LaHaise if (rc == -ENOMEM) 530f7ad74feSBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), 531f7ad74feSBenjamin LaHaise UDP_MIB_RCVBUFERRORS, is_udplite); 532f7ad74feSBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 533f7ad74feSBenjamin LaHaise kfree_skb(skb); 534f7ad74feSBenjamin LaHaise return -1; 535f7ad74feSBenjamin LaHaise } 536f7ad74feSBenjamin LaHaise return 0; 537f7ad74feSBenjamin LaHaise } 538f7ad74feSBenjamin LaHaise 539db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 540d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 541d5fdd6baSBrian Haley u8 code, int offset, __be32 info ) 542db8dac20SDavid S. Miller { 543645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 544db8dac20SDavid S. Miller } 545db8dac20SDavid S. Miller 546d7f3f621SBenjamin LaHaise static struct static_key udpv6_encap_needed __read_mostly; 547d7f3f621SBenjamin LaHaise void udpv6_encap_enable(void) 548d7f3f621SBenjamin LaHaise { 549d7f3f621SBenjamin LaHaise if (!static_key_enabled(&udpv6_encap_needed)) 550d7f3f621SBenjamin LaHaise static_key_slow_inc(&udpv6_encap_needed); 551d7f3f621SBenjamin LaHaise } 552d7f3f621SBenjamin LaHaise EXPORT_SYMBOL(udpv6_encap_enable); 553d7f3f621SBenjamin LaHaise 554db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 555db8dac20SDavid S. Miller { 556db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 557db8dac20SDavid S. Miller int rc; 558db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 559db8dac20SDavid S. Miller 560db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 561db8dac20SDavid S. Miller goto drop; 562db8dac20SDavid S. Miller 563d7f3f621SBenjamin LaHaise if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 564d7f3f621SBenjamin LaHaise int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); 565d7f3f621SBenjamin LaHaise 566d7f3f621SBenjamin LaHaise /* 567d7f3f621SBenjamin LaHaise * This is an encapsulation socket so pass the skb to 568d7f3f621SBenjamin LaHaise * the socket's udp_encap_rcv() hook. Otherwise, just 569d7f3f621SBenjamin LaHaise * fall through and pass this up the UDP socket. 570d7f3f621SBenjamin LaHaise * up->encap_rcv() returns the following value: 571d7f3f621SBenjamin LaHaise * =0 if skb was successfully passed to the encap 572d7f3f621SBenjamin LaHaise * handler or was discarded by it. 573d7f3f621SBenjamin LaHaise * >0 if skb should be passed on to UDP. 574d7f3f621SBenjamin LaHaise * <0 if skb should be resubmitted as proto -N 575d7f3f621SBenjamin LaHaise */ 576d7f3f621SBenjamin LaHaise 577d7f3f621SBenjamin LaHaise /* if we're overly short, let UDP handle it */ 578d7f3f621SBenjamin LaHaise encap_rcv = ACCESS_ONCE(up->encap_rcv); 579d7f3f621SBenjamin LaHaise if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) { 580d7f3f621SBenjamin LaHaise int ret; 581d7f3f621SBenjamin LaHaise 582d7f3f621SBenjamin LaHaise ret = encap_rcv(sk, skb); 583d7f3f621SBenjamin LaHaise if (ret <= 0) { 584d7f3f621SBenjamin LaHaise UDP_INC_STATS_BH(sock_net(sk), 585d7f3f621SBenjamin LaHaise UDP_MIB_INDATAGRAMS, 586d7f3f621SBenjamin LaHaise is_udplite); 587d7f3f621SBenjamin LaHaise return -ret; 588d7f3f621SBenjamin LaHaise } 589d7f3f621SBenjamin LaHaise } 590d7f3f621SBenjamin LaHaise 591d7f3f621SBenjamin LaHaise /* FALLTHROUGH -- it's a UDP Packet */ 592d7f3f621SBenjamin LaHaise } 593d7f3f621SBenjamin LaHaise 594db8dac20SDavid S. Miller /* 595db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 596db8dac20SDavid S. Miller */ 597db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 598db8dac20SDavid S. Miller 599db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 600db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" 601db8dac20SDavid S. Miller " %d while full coverage %d requested\n", 602db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 603db8dac20SDavid S. Miller goto drop; 604db8dac20SDavid S. Miller } 605db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 606db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " 607db8dac20SDavid S. Miller "too small, need min %d\n", 608db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 609db8dac20SDavid S. Miller goto drop; 610db8dac20SDavid S. Miller } 611db8dac20SDavid S. Miller } 612db8dac20SDavid S. Miller 61333d480ceSEric Dumazet if (rcu_access_pointer(sk->sk_filter)) { 614db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 615db8dac20SDavid S. Miller goto drop; 616db8dac20SDavid S. Miller } 617db8dac20SDavid S. Miller 618cb80ef46SBenjamin LaHaise if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) 619cb80ef46SBenjamin LaHaise goto drop; 620cb80ef46SBenjamin LaHaise 621d826eb14SEric Dumazet skb_dst_drop(skb); 622db8dac20SDavid S. Miller 623cb80ef46SBenjamin LaHaise bh_lock_sock(sk); 624cb80ef46SBenjamin LaHaise rc = 0; 625cb80ef46SBenjamin LaHaise if (!sock_owned_by_user(sk)) 626f7ad74feSBenjamin LaHaise rc = __udpv6_queue_rcv_skb(sk, skb); 627cb80ef46SBenjamin LaHaise else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { 628cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 629cb80ef46SBenjamin LaHaise goto drop; 630cb80ef46SBenjamin LaHaise } 631cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 632f7ad74feSBenjamin LaHaise 633f7ad74feSBenjamin LaHaise return rc; 634db8dac20SDavid S. Miller drop: 635ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 636cb80ef46SBenjamin LaHaise atomic_inc(&sk->sk_drops); 637db8dac20SDavid S. Miller kfree_skb(skb); 638db8dac20SDavid S. Miller return -1; 639db8dac20SDavid S. Miller } 640db8dac20SDavid S. Miller 641920a4611SEric Dumazet static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, 642b71d1d42SEric Dumazet __be16 loc_port, const struct in6_addr *loc_addr, 643b71d1d42SEric Dumazet __be16 rmt_port, const struct in6_addr *rmt_addr, 644db8dac20SDavid S. Miller int dif) 645db8dac20SDavid S. Miller { 64688ab1932SEric Dumazet struct hlist_nulls_node *node; 647db8dac20SDavid S. Miller struct sock *s = sk; 648db8dac20SDavid S. Miller unsigned short num = ntohs(loc_port); 649db8dac20SDavid S. Miller 65088ab1932SEric Dumazet sk_nulls_for_each_from(s, node) { 651db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(s); 652db8dac20SDavid S. Miller 653920a4611SEric Dumazet if (!net_eq(sock_net(s), net)) 654b8ad0cbcSDaniel Lezcano continue; 655b8ad0cbcSDaniel Lezcano 656d4cada4aSEric Dumazet if (udp_sk(s)->udp_port_hash == num && 657d4cada4aSEric Dumazet s->sk_family == PF_INET6) { 658db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(s); 659c720c7e8SEric Dumazet if (inet->inet_dport) { 660c720c7e8SEric Dumazet if (inet->inet_dport != rmt_port) 661db8dac20SDavid S. Miller continue; 662db8dac20SDavid S. Miller } 663db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr) && 664db8dac20SDavid S. Miller !ipv6_addr_equal(&np->daddr, rmt_addr)) 665db8dac20SDavid S. Miller continue; 666db8dac20SDavid S. Miller 667db8dac20SDavid S. Miller if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) 668db8dac20SDavid S. Miller continue; 669db8dac20SDavid S. Miller 670db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 671db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) 672db8dac20SDavid S. Miller continue; 673db8dac20SDavid S. Miller } 674db8dac20SDavid S. Miller if (!inet6_mc_check(s, loc_addr, rmt_addr)) 675db8dac20SDavid S. Miller continue; 676db8dac20SDavid S. Miller return s; 677db8dac20SDavid S. Miller } 678db8dac20SDavid S. Miller } 679db8dac20SDavid S. Miller return NULL; 680db8dac20SDavid S. Miller } 681db8dac20SDavid S. Miller 682a1ab77f9SEric Dumazet static void flush_stack(struct sock **stack, unsigned int count, 683a1ab77f9SEric Dumazet struct sk_buff *skb, unsigned int final) 684a1ab77f9SEric Dumazet { 685cb80ef46SBenjamin LaHaise struct sk_buff *skb1 = NULL; 686a1ab77f9SEric Dumazet struct sock *sk; 687cb80ef46SBenjamin LaHaise unsigned int i; 688a1ab77f9SEric Dumazet 689a1ab77f9SEric Dumazet for (i = 0; i < count; i++) { 690a1ab77f9SEric Dumazet sk = stack[i]; 691cb80ef46SBenjamin LaHaise if (likely(skb1 == NULL)) 692cb80ef46SBenjamin LaHaise skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); 693cb80ef46SBenjamin LaHaise if (!skb1) { 694f6b8f32cSEric Dumazet atomic_inc(&sk->sk_drops); 695cb80ef46SBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS, 696cb80ef46SBenjamin LaHaise IS_UDPLITE(sk)); 697cb80ef46SBenjamin LaHaise UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, 698cb80ef46SBenjamin LaHaise IS_UDPLITE(sk)); 699a1ab77f9SEric Dumazet } 700cb80ef46SBenjamin LaHaise 701cb80ef46SBenjamin LaHaise if (skb1 && udpv6_queue_rcv_skb(sk, skb1) <= 0) 702cb80ef46SBenjamin LaHaise skb1 = NULL; 703cb80ef46SBenjamin LaHaise } 704cb80ef46SBenjamin LaHaise if (unlikely(skb1)) 705cb80ef46SBenjamin LaHaise kfree_skb(skb1); 706a1ab77f9SEric Dumazet } 707db8dac20SDavid S. Miller /* 708db8dac20SDavid S. Miller * Note: called only from the BH handler context, 709db8dac20SDavid S. Miller * so we don't need to lock the hashes. 710db8dac20SDavid S. Miller */ 711e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 712b71d1d42SEric Dumazet const struct in6_addr *saddr, const struct in6_addr *daddr, 713645ca708SEric Dumazet struct udp_table *udptable) 714db8dac20SDavid S. Miller { 715a1ab77f9SEric Dumazet struct sock *sk, *stack[256 / sizeof(struct sock *)]; 716db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 717f86dcc5aSEric Dumazet struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); 718db8dac20SDavid S. Miller int dif; 719a1ab77f9SEric Dumazet unsigned int i, count = 0; 720db8dac20SDavid S. Miller 721645ca708SEric Dumazet spin_lock(&hslot->lock); 72288ab1932SEric Dumazet sk = sk_nulls_head(&hslot->head); 723db8dac20SDavid S. Miller dif = inet6_iif(skb); 724920a4611SEric Dumazet sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); 725a1ab77f9SEric Dumazet while (sk) { 726a1ab77f9SEric Dumazet stack[count++] = sk; 727a1ab77f9SEric Dumazet sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, 728a1ab77f9SEric Dumazet uh->source, saddr, dif); 729a1ab77f9SEric Dumazet if (unlikely(count == ARRAY_SIZE(stack))) { 730a1ab77f9SEric Dumazet if (!sk) 731a1ab77f9SEric Dumazet break; 732a1ab77f9SEric Dumazet flush_stack(stack, count, skb, ~0); 733a1ab77f9SEric Dumazet count = 0; 734db8dac20SDavid S. Miller } 735a1ab77f9SEric Dumazet } 736a1ab77f9SEric Dumazet /* 737a1ab77f9SEric Dumazet * before releasing the lock, we must take reference on sockets 738a1ab77f9SEric Dumazet */ 739a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 740a1ab77f9SEric Dumazet sock_hold(stack[i]); 741db8dac20SDavid S. Miller 742645ca708SEric Dumazet spin_unlock(&hslot->lock); 743a1ab77f9SEric Dumazet 744a1ab77f9SEric Dumazet if (count) { 745a1ab77f9SEric Dumazet flush_stack(stack, count, skb, count - 1); 746a1ab77f9SEric Dumazet 747a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 748a1ab77f9SEric Dumazet sock_put(stack[i]); 749a1ab77f9SEric Dumazet } else { 750a1ab77f9SEric Dumazet kfree_skb(skb); 751a1ab77f9SEric Dumazet } 752db8dac20SDavid S. Miller return 0; 753db8dac20SDavid S. Miller } 754db8dac20SDavid S. Miller 755db8dac20SDavid S. Miller static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, 756db8dac20SDavid S. Miller int proto) 757db8dac20SDavid S. Miller { 758db8dac20SDavid S. Miller int err; 759db8dac20SDavid S. Miller 760db8dac20SDavid S. Miller UDP_SKB_CB(skb)->partial_cov = 0; 761db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov = skb->len; 762db8dac20SDavid S. Miller 763db8dac20SDavid S. Miller if (proto == IPPROTO_UDPLITE) { 764db8dac20SDavid S. Miller err = udplite_checksum_init(skb, uh); 765db8dac20SDavid S. Miller if (err) 766db8dac20SDavid S. Miller return err; 767db8dac20SDavid S. Miller } 768db8dac20SDavid S. Miller 769db8dac20SDavid S. Miller if (uh->check == 0) { 770db8dac20SDavid S. Miller /* RFC 2460 section 8.1 says that we SHOULD log 771db8dac20SDavid S. Miller this error. Well, it is reasonable. 772db8dac20SDavid S. Miller */ 773db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); 774db8dac20SDavid S. Miller return 1; 775db8dac20SDavid S. Miller } 776db8dac20SDavid S. Miller if (skb->ip_summed == CHECKSUM_COMPLETE && 777db8dac20SDavid S. Miller !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, 778db8dac20SDavid S. Miller skb->len, proto, skb->csum)) 779db8dac20SDavid S. Miller skb->ip_summed = CHECKSUM_UNNECESSARY; 780db8dac20SDavid S. Miller 781db8dac20SDavid S. Miller if (!skb_csum_unnecessary(skb)) 782db8dac20SDavid S. Miller skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 783db8dac20SDavid S. Miller &ipv6_hdr(skb)->daddr, 784db8dac20SDavid S. Miller skb->len, proto, 0)); 785db8dac20SDavid S. Miller 786db8dac20SDavid S. Miller return 0; 787db8dac20SDavid S. Miller } 788db8dac20SDavid S. Miller 789645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 790db8dac20SDavid S. Miller int proto) 791db8dac20SDavid S. Miller { 7923ffe533cSAlexey Dobriyan struct net *net = dev_net(skb->dev); 793db8dac20SDavid S. Miller struct sock *sk; 794db8dac20SDavid S. Miller struct udphdr *uh; 795b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 796db8dac20SDavid S. Miller u32 ulen = 0; 797db8dac20SDavid S. Miller 798db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 799d6bc0149SBjørn Mork goto discard; 800db8dac20SDavid S. Miller 801db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 802db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 803db8dac20SDavid S. Miller uh = udp_hdr(skb); 804db8dac20SDavid S. Miller 805db8dac20SDavid S. Miller ulen = ntohs(uh->len); 806db8dac20SDavid S. Miller if (ulen > skb->len) 807db8dac20SDavid S. Miller goto short_packet; 808db8dac20SDavid S. Miller 809db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 810db8dac20SDavid S. Miller /* UDP validates ulen. */ 811db8dac20SDavid S. Miller 812db8dac20SDavid S. Miller /* Check for jumbo payload */ 813db8dac20SDavid S. Miller if (ulen == 0) 814db8dac20SDavid S. Miller ulen = skb->len; 815db8dac20SDavid S. Miller 816db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 817db8dac20SDavid S. Miller goto short_packet; 818db8dac20SDavid S. Miller 819db8dac20SDavid S. Miller if (ulen < skb->len) { 820db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 821db8dac20SDavid S. Miller goto short_packet; 822db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 823db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 824db8dac20SDavid S. Miller uh = udp_hdr(skb); 825db8dac20SDavid S. Miller } 826db8dac20SDavid S. Miller } 827db8dac20SDavid S. Miller 828db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 829db8dac20SDavid S. Miller goto discard; 830db8dac20SDavid S. Miller 831db8dac20SDavid S. Miller /* 832db8dac20SDavid S. Miller * Multicast receive code 833db8dac20SDavid S. Miller */ 834db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 835e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 836e3163493SPavel Emelyanov saddr, daddr, udptable); 837db8dac20SDavid S. Miller 838db8dac20SDavid S. Miller /* Unicast */ 839db8dac20SDavid S. Miller 840db8dac20SDavid S. Miller /* 841db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 842db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 843db8dac20SDavid S. Miller */ 844607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 845cb80ef46SBenjamin LaHaise if (sk != NULL) { 846cb80ef46SBenjamin LaHaise int ret = udpv6_queue_rcv_skb(sk, skb); 847cb80ef46SBenjamin LaHaise sock_put(sk); 848db8dac20SDavid S. Miller 849cb80ef46SBenjamin LaHaise /* a return value > 0 means to resubmit the input, but 850cb80ef46SBenjamin LaHaise * it wants the return to be -protocol, or 0 851cb80ef46SBenjamin LaHaise */ 852cb80ef46SBenjamin LaHaise if (ret > 0) 853cb80ef46SBenjamin LaHaise return -ret; 854cb80ef46SBenjamin LaHaise 855cb80ef46SBenjamin LaHaise return 0; 856cb80ef46SBenjamin LaHaise } 857cb80ef46SBenjamin LaHaise 858db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 859db8dac20SDavid S. Miller goto discard; 860db8dac20SDavid S. Miller 861db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 862db8dac20SDavid S. Miller goto discard; 863db8dac20SDavid S. Miller 864cb80ef46SBenjamin LaHaise UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); 8653ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 866db8dac20SDavid S. Miller 867db8dac20SDavid S. Miller kfree_skb(skb); 868db8dac20SDavid S. Miller return 0; 869db8dac20SDavid S. Miller 870db8dac20SDavid S. Miller short_packet: 871d6bc0149SBjørn Mork LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 872db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 873d6bc0149SBjørn Mork saddr, 874d6bc0149SBjørn Mork ntohs(uh->source), 875d6bc0149SBjørn Mork ulen, 876d6bc0149SBjørn Mork skb->len, 877d6bc0149SBjørn Mork daddr, 878d6bc0149SBjørn Mork ntohs(uh->dest)); 879db8dac20SDavid S. Miller 880db8dac20SDavid S. Miller discard: 881ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 882db8dac20SDavid S. Miller kfree_skb(skb); 883db8dac20SDavid S. Miller return 0; 884db8dac20SDavid S. Miller } 885db8dac20SDavid S. Miller 886db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 887db8dac20SDavid S. Miller { 888645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 889db8dac20SDavid S. Miller } 890db8dac20SDavid S. Miller 891db8dac20SDavid S. Miller /* 892db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 893db8dac20SDavid S. Miller */ 894db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 895db8dac20SDavid S. Miller { 896db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 897db8dac20SDavid S. Miller 89836d926b9SDenis V. Lunev if (up->pending == AF_INET) 89936d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 90036d926b9SDenis V. Lunev else if (up->pending) { 901db8dac20SDavid S. Miller up->len = 0; 902db8dac20SDavid S. Miller up->pending = 0; 903db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 904db8dac20SDavid S. Miller } 905db8dac20SDavid S. Miller } 906db8dac20SDavid S. Miller 907493c6be3SSridhar Samudrala /** 908493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 909493c6be3SSridhar Samudrala * @sk: socket we are sending on 910493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 911493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 912493c6be3SSridhar Samudrala */ 913493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 914493c6be3SSridhar Samudrala const struct in6_addr *saddr, 915493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 916493c6be3SSridhar Samudrala { 917493c6be3SSridhar Samudrala unsigned int offset; 918493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 919493c6be3SSridhar Samudrala __wsum csum = 0; 920493c6be3SSridhar Samudrala 921493c6be3SSridhar Samudrala if (skb_queue_len(&sk->sk_write_queue) == 1) { 922493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 923493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 924493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 925493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 926493c6be3SSridhar Samudrala } else { 927493c6be3SSridhar Samudrala /* 928493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 929493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 930493c6be3SSridhar Samudrala * should be together 931493c6be3SSridhar Samudrala */ 932493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 933493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 934493c6be3SSridhar Samudrala 935493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 936493c6be3SSridhar Samudrala 937493c6be3SSridhar Samudrala skb_queue_walk(&sk->sk_write_queue, skb) { 938493c6be3SSridhar Samudrala csum = csum_add(csum, skb->csum); 939493c6be3SSridhar Samudrala } 940493c6be3SSridhar Samudrala 941493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 942493c6be3SSridhar Samudrala csum); 943493c6be3SSridhar Samudrala if (uh->check == 0) 944493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 945493c6be3SSridhar Samudrala } 946493c6be3SSridhar Samudrala } 947493c6be3SSridhar Samudrala 948db8dac20SDavid S. Miller /* 949db8dac20SDavid S. Miller * Sending 950db8dac20SDavid S. Miller */ 951db8dac20SDavid S. Miller 952db8dac20SDavid S. Miller static int udp_v6_push_pending_frames(struct sock *sk) 953db8dac20SDavid S. Miller { 954db8dac20SDavid S. Miller struct sk_buff *skb; 955db8dac20SDavid S. Miller struct udphdr *uh; 956db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 957db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 9584c9483b2SDavid S. Miller struct flowi6 *fl6 = &inet->cork.fl.u.ip6; 959db8dac20SDavid S. Miller int err = 0; 960db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 961db8dac20SDavid S. Miller __wsum csum = 0; 962db8dac20SDavid S. Miller 963db8dac20SDavid S. Miller /* Grab the skbuff where UDP header space exists. */ 964db8dac20SDavid S. Miller if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 965db8dac20SDavid S. Miller goto out; 966db8dac20SDavid S. Miller 967db8dac20SDavid S. Miller /* 968db8dac20SDavid S. Miller * Create a UDP header 969db8dac20SDavid S. Miller */ 970db8dac20SDavid S. Miller uh = udp_hdr(skb); 9711958b856SDavid S. Miller uh->source = fl6->fl6_sport; 9721958b856SDavid S. Miller uh->dest = fl6->fl6_dport; 973db8dac20SDavid S. Miller uh->len = htons(up->len); 974db8dac20SDavid S. Miller uh->check = 0; 975db8dac20SDavid S. Miller 976db8dac20SDavid S. Miller if (is_udplite) 977db8dac20SDavid S. Miller csum = udplite_csum_outgoing(sk, skb); 978493c6be3SSridhar Samudrala else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 9794c9483b2SDavid S. Miller udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, 980493c6be3SSridhar Samudrala up->len); 981493c6be3SSridhar Samudrala goto send; 982493c6be3SSridhar Samudrala } else 983db8dac20SDavid S. Miller csum = udp_csum_outgoing(sk, skb); 984db8dac20SDavid S. Miller 985db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 9864c9483b2SDavid S. Miller uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 9874c9483b2SDavid S. Miller up->len, fl6->flowi6_proto, csum); 988db8dac20SDavid S. Miller if (uh->check == 0) 989db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 990db8dac20SDavid S. Miller 991493c6be3SSridhar Samudrala send: 992db8dac20SDavid S. Miller err = ip6_push_pending_frames(sk); 9936ce9e7b5SEric Dumazet if (err) { 9946ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 9956ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9966ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 9976ce9e7b5SEric Dumazet err = 0; 9986ce9e7b5SEric Dumazet } 9996ce9e7b5SEric Dumazet } else 10006ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 10016ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 1002db8dac20SDavid S. Miller out: 1003db8dac20SDavid S. Miller up->len = 0; 1004db8dac20SDavid S. Miller up->pending = 0; 1005db8dac20SDavid S. Miller return err; 1006db8dac20SDavid S. Miller } 1007db8dac20SDavid S. Miller 1008db8dac20SDavid S. Miller int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, 1009db8dac20SDavid S. Miller struct msghdr *msg, size_t len) 1010db8dac20SDavid S. Miller { 1011db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 1012db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 1013db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 1014db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 1015db8dac20SDavid S. Miller struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; 101620c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 1017db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 1018db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 10194c9483b2SDavid S. Miller struct flowi6 fl6; 1020db8dac20SDavid S. Miller struct dst_entry *dst; 1021db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 1022db8dac20SDavid S. Miller int ulen = len; 1023db8dac20SDavid S. Miller int hlimit = -1; 1024db8dac20SDavid S. Miller int tclass = -1; 102513b52cd4SBrian Haley int dontfrag = -1; 1026db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 1027db8dac20SDavid S. Miller int err; 1028db8dac20SDavid S. Miller int connected = 0; 1029db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 1030db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 1031db8dac20SDavid S. Miller 1032db8dac20SDavid S. Miller /* destination address check */ 1033db8dac20SDavid S. Miller if (sin6) { 1034db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 1035db8dac20SDavid S. Miller return -EINVAL; 1036db8dac20SDavid S. Miller 1037db8dac20SDavid S. Miller switch (sin6->sin6_family) { 1038db8dac20SDavid S. Miller case AF_INET6: 1039db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 1040db8dac20SDavid S. Miller return -EINVAL; 1041db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1042db8dac20SDavid S. Miller break; 1043db8dac20SDavid S. Miller case AF_INET: 1044db8dac20SDavid S. Miller goto do_udp_sendmsg; 1045db8dac20SDavid S. Miller case AF_UNSPEC: 1046db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 1047db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 1048db8dac20SDavid S. Miller daddr = NULL; 1049db8dac20SDavid S. Miller break; 1050db8dac20SDavid S. Miller default: 1051db8dac20SDavid S. Miller return -EINVAL; 1052db8dac20SDavid S. Miller } 1053db8dac20SDavid S. Miller } else if (!up->pending) { 1054db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1055db8dac20SDavid S. Miller return -EDESTADDRREQ; 1056db8dac20SDavid S. Miller daddr = &np->daddr; 1057db8dac20SDavid S. Miller } else 1058db8dac20SDavid S. Miller daddr = NULL; 1059db8dac20SDavid S. Miller 1060db8dac20SDavid S. Miller if (daddr) { 1061db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 1062db8dac20SDavid S. Miller struct sockaddr_in sin; 1063db8dac20SDavid S. Miller sin.sin_family = AF_INET; 1064c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 1065db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1066db8dac20SDavid S. Miller msg->msg_name = &sin; 1067db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 1068db8dac20SDavid S. Miller do_udp_sendmsg: 1069db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 1070db8dac20SDavid S. Miller return -ENETUNREACH; 1071db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1072db8dac20SDavid S. Miller } 1073db8dac20SDavid S. Miller } 1074db8dac20SDavid S. Miller 1075db8dac20SDavid S. Miller if (up->pending == AF_INET) 1076db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 1077db8dac20SDavid S. Miller 1078db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1079db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1080db8dac20SDavid S. Miller */ 1081db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1082db8dac20SDavid S. Miller return -EMSGSIZE; 1083db8dac20SDavid S. Miller 1084db8dac20SDavid S. Miller if (up->pending) { 1085db8dac20SDavid S. Miller /* 1086db8dac20SDavid S. Miller * There are pending frames. 1087db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1088db8dac20SDavid S. Miller */ 1089db8dac20SDavid S. Miller lock_sock(sk); 1090db8dac20SDavid S. Miller if (likely(up->pending)) { 1091db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1092db8dac20SDavid S. Miller release_sock(sk); 1093db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1094db8dac20SDavid S. Miller } 1095db8dac20SDavid S. Miller dst = NULL; 1096db8dac20SDavid S. Miller goto do_append_data; 1097db8dac20SDavid S. Miller } 1098db8dac20SDavid S. Miller release_sock(sk); 1099db8dac20SDavid S. Miller } 1100db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1101db8dac20SDavid S. Miller 11024c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 1103db8dac20SDavid S. Miller 1104db8dac20SDavid S. Miller if (sin6) { 1105db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1106db8dac20SDavid S. Miller return -EINVAL; 1107db8dac20SDavid S. Miller 11081958b856SDavid S. Miller fl6.fl6_dport = sin6->sin6_port; 1109db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1110db8dac20SDavid S. Miller 1111db8dac20SDavid S. Miller if (np->sndflow) { 11124c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 11134c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 11144c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1115db8dac20SDavid S. Miller if (flowlabel == NULL) 1116db8dac20SDavid S. Miller return -EINVAL; 1117db8dac20SDavid S. Miller daddr = &flowlabel->dst; 1118db8dac20SDavid S. Miller } 1119db8dac20SDavid S. Miller } 1120db8dac20SDavid S. Miller 1121db8dac20SDavid S. Miller /* 1122db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1123db8dac20SDavid S. Miller * sk->sk_dst_cache. 1124db8dac20SDavid S. Miller */ 1125db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1126db8dac20SDavid S. Miller ipv6_addr_equal(daddr, &np->daddr)) 1127db8dac20SDavid S. Miller daddr = &np->daddr; 1128db8dac20SDavid S. Miller 1129db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1130db8dac20SDavid S. Miller sin6->sin6_scope_id && 1131db8dac20SDavid S. Miller ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) 11324c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 1133db8dac20SDavid S. Miller } else { 1134db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1135db8dac20SDavid S. Miller return -EDESTADDRREQ; 1136db8dac20SDavid S. Miller 11371958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 1138db8dac20SDavid S. Miller daddr = &np->daddr; 11394c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 1140db8dac20SDavid S. Miller connected = 1; 1141db8dac20SDavid S. Miller } 1142db8dac20SDavid S. Miller 11434c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11444c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 1145db8dac20SDavid S. Miller 11464c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11474c9483b2SDavid S. Miller fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 11489f690db7SYang Hongyang 11494c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 115051953d5bSBrian Haley 1151db8dac20SDavid S. Miller if (msg->msg_controllen) { 1152db8dac20SDavid S. Miller opt = &opt_space; 1153db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1154db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 1155db8dac20SDavid S. Miller 115673df66f8STom Parkin err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, 1157ec0506dbSMaciej Żenczykowski &hlimit, &tclass, &dontfrag); 1158db8dac20SDavid S. Miller if (err < 0) { 1159db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1160db8dac20SDavid S. Miller return err; 1161db8dac20SDavid S. Miller } 11624c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 11634c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 1164db8dac20SDavid S. Miller if (flowlabel == NULL) 1165db8dac20SDavid S. Miller return -EINVAL; 1166db8dac20SDavid S. Miller } 1167db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1168db8dac20SDavid S. Miller opt = NULL; 1169db8dac20SDavid S. Miller connected = 0; 1170db8dac20SDavid S. Miller } 1171db8dac20SDavid S. Miller if (opt == NULL) 1172db8dac20SDavid S. Miller opt = np->opt; 1173db8dac20SDavid S. Miller if (flowlabel) 1174db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1175db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 1176db8dac20SDavid S. Miller 11774c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 1178876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 11794e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr; 1180876c7f41SBrian Haley else 11814c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 11824c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 11834e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 11841958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 1185db8dac20SDavid S. Miller 11864c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 118720c59de2SArnaud Ebalard if (final_p) 1188db8dac20SDavid S. Miller connected = 0; 1189db8dac20SDavid S. Miller 11904c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { 11914c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 1192db8dac20SDavid S. Miller connected = 0; 1193c4062dfcSErich E. Hoover } else if (!fl6.flowi6_oif) 1194c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif; 1195db8dac20SDavid S. Miller 11964c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 1197db8dac20SDavid S. Miller 11984c9483b2SDavid S. Miller dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); 119968d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 120068d0c6d3SDavid S. Miller err = PTR_ERR(dst); 120168d0c6d3SDavid S. Miller dst = NULL; 1202db8dac20SDavid S. Miller goto out; 1203db8dac20SDavid S. Miller } 1204db8dac20SDavid S. Miller 1205db8dac20SDavid S. Miller if (hlimit < 0) { 12064c9483b2SDavid S. Miller if (ipv6_addr_is_multicast(&fl6.daddr)) 1207db8dac20SDavid S. Miller hlimit = np->mcast_hops; 1208db8dac20SDavid S. Miller else 1209db8dac20SDavid S. Miller hlimit = np->hop_limit; 1210db8dac20SDavid S. Miller if (hlimit < 0) 12116b75d090SYOSHIFUJI Hideaki hlimit = ip6_dst_hoplimit(dst); 1212db8dac20SDavid S. Miller } 1213db8dac20SDavid S. Miller 1214db8dac20SDavid S. Miller if (tclass < 0) 1215e651f03aSGerrit Renker tclass = np->tclass; 1216db8dac20SDavid S. Miller 121713b52cd4SBrian Haley if (dontfrag < 0) 121813b52cd4SBrian Haley dontfrag = np->dontfrag; 121913b52cd4SBrian Haley 1220db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1221db8dac20SDavid S. Miller goto do_confirm; 1222db8dac20SDavid S. Miller back_from_confirm: 1223db8dac20SDavid S. Miller 1224db8dac20SDavid S. Miller lock_sock(sk); 1225db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1226db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1227db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1228db8dac20SDavid S. Miller release_sock(sk); 1229db8dac20SDavid S. Miller 1230db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); 1231db8dac20SDavid S. Miller err = -EINVAL; 1232db8dac20SDavid S. Miller goto out; 1233db8dac20SDavid S. Miller } 1234db8dac20SDavid S. Miller 1235db8dac20SDavid S. Miller up->pending = AF_INET6; 1236db8dac20SDavid S. Miller 1237db8dac20SDavid S. Miller do_append_data: 1238db8dac20SDavid S. Miller up->len += ulen; 1239db8dac20SDavid S. Miller getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1240db8dac20SDavid S. Miller err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, 12414c9483b2SDavid S. Miller sizeof(struct udphdr), hlimit, tclass, opt, &fl6, 1242db8dac20SDavid S. Miller (struct rt6_info*)dst, 124313b52cd4SBrian Haley corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); 1244db8dac20SDavid S. Miller if (err) 1245db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1246db8dac20SDavid S. Miller else if (!corkreq) 1247db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1248db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1249db8dac20SDavid S. Miller up->pending = 0; 1250db8dac20SDavid S. Miller 1251db8dac20SDavid S. Miller if (dst) { 1252db8dac20SDavid S. Miller if (connected) { 1253db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 12544c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.daddr, &np->daddr) ? 1255db8dac20SDavid S. Miller &np->daddr : NULL, 1256db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 12574c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1258db8dac20SDavid S. Miller &np->saddr : 1259db8dac20SDavid S. Miller #endif 1260db8dac20SDavid S. Miller NULL); 1261db8dac20SDavid S. Miller } else { 1262db8dac20SDavid S. Miller dst_release(dst); 1263db8dac20SDavid S. Miller } 1264a3c96089SYOSHIFUJI Hideaki dst = NULL; 1265db8dac20SDavid S. Miller } 1266db8dac20SDavid S. Miller 1267db8dac20SDavid S. Miller if (err > 0) 1268db8dac20SDavid S. Miller err = np->recverr ? net_xmit_errno(err) : 0; 1269db8dac20SDavid S. Miller release_sock(sk); 1270db8dac20SDavid S. Miller out: 1271a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1272db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1273db8dac20SDavid S. Miller if (!err) 1274db8dac20SDavid S. Miller return len; 1275db8dac20SDavid S. Miller /* 1276db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1277db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1278db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1279db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1280db8dac20SDavid S. Miller * seems like overkill. 1281db8dac20SDavid S. Miller */ 1282db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 1283235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 1284235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1285db8dac20SDavid S. Miller } 1286db8dac20SDavid S. Miller return err; 1287db8dac20SDavid S. Miller 1288db8dac20SDavid S. Miller do_confirm: 1289db8dac20SDavid S. Miller dst_confirm(dst); 1290db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1291db8dac20SDavid S. Miller goto back_from_confirm; 1292db8dac20SDavid S. Miller err = 0; 1293db8dac20SDavid S. Miller goto out; 1294db8dac20SDavid S. Miller } 1295db8dac20SDavid S. Miller 12967d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1297db8dac20SDavid S. Miller { 1298db8dac20SDavid S. Miller lock_sock(sk); 1299db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1300db8dac20SDavid S. Miller release_sock(sk); 1301db8dac20SDavid S. Miller 1302db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1303db8dac20SDavid S. Miller } 1304db8dac20SDavid S. Miller 1305db8dac20SDavid S. Miller /* 1306db8dac20SDavid S. Miller * Socket option code for UDP 1307db8dac20SDavid S. Miller */ 1308db8dac20SDavid S. Miller int 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 ipv6_setsockopt(sk, level, optname, optval, optlen); 1315db8dac20SDavid S. Miller } 1316db8dac20SDavid S. Miller 1317db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1318db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1319b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1320db8dac20SDavid S. Miller { 1321db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1322db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1323db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1324db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1325db8dac20SDavid S. Miller } 1326db8dac20SDavid S. Miller #endif 1327db8dac20SDavid S. Miller 1328db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1329db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1330db8dac20SDavid S. Miller { 1331db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1332db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1333db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1334db8dac20SDavid S. Miller } 1335db8dac20SDavid S. Miller 1336db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1337db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1338db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1339db8dac20SDavid S. Miller { 1340db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1341db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1342db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1343db8dac20SDavid S. Miller } 1344db8dac20SDavid S. Miller #endif 1345db8dac20SDavid S. Miller 134641135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1347db8dac20SDavid S. Miller .handler = udpv6_rcv, 1348db8dac20SDavid S. Miller .err_handler = udpv6_err, 1349db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1350db8dac20SDavid S. Miller }; 1351db8dac20SDavid S. Miller 1352db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1353db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1354db8dac20SDavid S. Miller 1355db8dac20SDavid S. Miller static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) 1356db8dac20SDavid S. Miller { 1357db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sp); 1358db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sp); 1359b71d1d42SEric Dumazet const struct in6_addr *dest, *src; 1360db8dac20SDavid S. Miller __u16 destp, srcp; 1361db8dac20SDavid S. Miller 1362db8dac20SDavid S. Miller dest = &np->daddr; 1363db8dac20SDavid S. Miller src = &np->rcv_saddr; 1364c720c7e8SEric Dumazet destp = ntohs(inet->inet_dport); 1365c720c7e8SEric Dumazet srcp = ntohs(inet->inet_sport); 1366db8dac20SDavid S. Miller seq_printf(seq, 1367f86dcc5aSEric Dumazet "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 136871338aa7SDan Rosenberg "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", 1369db8dac20SDavid S. Miller bucket, 1370db8dac20SDavid S. Miller src->s6_addr32[0], src->s6_addr32[1], 1371db8dac20SDavid S. Miller src->s6_addr32[2], src->s6_addr32[3], srcp, 1372db8dac20SDavid S. Miller dest->s6_addr32[0], dest->s6_addr32[1], 1373db8dac20SDavid S. Miller dest->s6_addr32[2], dest->s6_addr32[3], destp, 1374db8dac20SDavid S. Miller sp->sk_state, 137531e6d363SEric Dumazet sk_wmem_alloc_get(sp), 137631e6d363SEric Dumazet sk_rmem_alloc_get(sp), 1377db8dac20SDavid S. Miller 0, 0L, 0, 1378a7cb5a49SEric W. Biederman from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 1379a7cb5a49SEric W. Biederman 0, 1380db8dac20SDavid S. Miller sock_i_ino(sp), 1381cb61cb9bSEric Dumazet atomic_read(&sp->sk_refcnt), sp, 1382cb61cb9bSEric Dumazet atomic_read(&sp->sk_drops)); 1383db8dac20SDavid S. Miller } 1384db8dac20SDavid S. Miller 1385db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1386db8dac20SDavid S. Miller { 1387db8dac20SDavid S. Miller if (v == SEQ_START_TOKEN) 1388db8dac20SDavid S. Miller seq_printf(seq, 1389db8dac20SDavid S. Miller " sl " 1390db8dac20SDavid S. Miller "local_address " 1391db8dac20SDavid S. Miller "remote_address " 1392db8dac20SDavid S. Miller "st tx_queue rx_queue tr tm->when retrnsmt" 1393cb61cb9bSEric Dumazet " uid timeout inode ref pointer drops\n"); 1394db8dac20SDavid S. Miller else 1395db8dac20SDavid S. Miller udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); 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 1427db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1428db8dac20SDavid S. Miller 1429db8dac20SDavid S. Miller struct proto udpv6_prot = { 1430db8dac20SDavid S. Miller .name = "UDPv6", 1431db8dac20SDavid S. Miller .owner = THIS_MODULE, 1432db8dac20SDavid S. Miller .close = udp_lib_close, 1433db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1434db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1435db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1436db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1437db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1438db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1439db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1440db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1441f7ad74feSBenjamin LaHaise .backlog_rcv = __udpv6_queue_rcv_skb, 1442db8dac20SDavid S. Miller .hash = udp_lib_hash, 1443db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1444719f8358SEric Dumazet .rehash = udp_v6_rehash, 1445db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1446db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1447db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1448db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1449db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1450db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1451271b72c7SEric Dumazet .slab_flags = SLAB_DESTROY_BY_RCU, 1452645ca708SEric Dumazet .h.udp_table = &udp_table, 1453db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1454db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1455db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1456db8dac20SDavid S. Miller #endif 1457fcbdf09dSOctavian Purdila .clear_sk = sk_prot_clear_portaddr_nulls, 1458db8dac20SDavid S. Miller }; 1459db8dac20SDavid S. Miller 1460db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1461db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1462db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1463db8dac20SDavid S. Miller .prot = &udpv6_prot, 1464db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1465db8dac20SDavid S. Miller .no_check = UDP_CSUM_DEFAULT, 1466db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1467db8dac20SDavid S. Miller }; 1468db8dac20SDavid S. Miller 1469db8dac20SDavid S. Miller 1470db8dac20SDavid S. Miller int __init udpv6_init(void) 1471db8dac20SDavid S. Miller { 1472db8dac20SDavid S. Miller int ret; 1473db8dac20SDavid S. Miller 14743336288aSVlad Yasevich ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 14753336288aSVlad Yasevich if (ret) 1476c6b641a4SVlad Yasevich goto out; 14773336288aSVlad Yasevich 1478db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1479db8dac20SDavid S. Miller if (ret) 1480db8dac20SDavid S. Miller goto out_udpv6_protocol; 1481db8dac20SDavid S. Miller out: 1482db8dac20SDavid S. Miller return ret; 1483db8dac20SDavid S. Miller 1484db8dac20SDavid S. Miller out_udpv6_protocol: 1485db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1486db8dac20SDavid S. Miller goto out; 1487db8dac20SDavid S. Miller } 1488db8dac20SDavid S. Miller 1489db8dac20SDavid S. Miller void udpv6_exit(void) 1490db8dac20SDavid S. Miller { 1491db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1492db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1493db8dac20SDavid S. Miller } 1494