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 40496611d7SCraig Gallek #include <net/addrconf.h> 41db8dac20SDavid S. Miller #include <net/ndisc.h> 42db8dac20SDavid S. Miller #include <net/protocol.h> 43db8dac20SDavid S. Miller #include <net/transp_v6.h> 44db8dac20SDavid S. Miller #include <net/ip6_route.h> 45db8dac20SDavid S. Miller #include <net/raw.h> 46db8dac20SDavid S. Miller #include <net/tcp_states.h> 47db8dac20SDavid S. Miller #include <net/ip6_checksum.h> 48db8dac20SDavid S. Miller #include <net/xfrm.h> 4972289b96STom Herbert #include <net/inet6_hashtables.h> 50076bb0c8SEliezer Tamir #include <net/busy_poll.h> 51e32ea7e7SCraig Gallek #include <net/sock_reuseport.h> 52db8dac20SDavid S. Miller 53db8dac20SDavid S. Miller #include <linux/proc_fs.h> 54db8dac20SDavid S. Miller #include <linux/seq_file.h> 5522911fc5SEric Dumazet #include <trace/events/skb.h> 56db8dac20SDavid S. Miller #include "udp_impl.h" 57db8dac20SDavid S. Miller 586eada011SEric Dumazet static u32 udp6_ehashfn(const struct net *net, 59b50026b5SHannes Frederic Sowa const struct in6_addr *laddr, 60b50026b5SHannes Frederic Sowa const u16 lport, 61b50026b5SHannes Frederic Sowa const struct in6_addr *faddr, 62b50026b5SHannes Frederic Sowa const __be16 fport) 63b50026b5SHannes Frederic Sowa { 641bbdceefSHannes Frederic Sowa static u32 udp6_ehash_secret __read_mostly; 651bbdceefSHannes Frederic Sowa static u32 udp_ipv6_hash_secret __read_mostly; 661bbdceefSHannes Frederic Sowa 671bbdceefSHannes Frederic Sowa u32 lhash, fhash; 681bbdceefSHannes Frederic Sowa 691bbdceefSHannes Frederic Sowa net_get_random_once(&udp6_ehash_secret, 701bbdceefSHannes Frederic Sowa sizeof(udp6_ehash_secret)); 711bbdceefSHannes Frederic Sowa net_get_random_once(&udp_ipv6_hash_secret, 721bbdceefSHannes Frederic Sowa sizeof(udp_ipv6_hash_secret)); 731bbdceefSHannes Frederic Sowa 741bbdceefSHannes Frederic Sowa lhash = (__force u32)laddr->s6_addr32[3]; 751bbdceefSHannes Frederic Sowa fhash = __ipv6_addr_jhash(faddr, udp_ipv6_hash_secret); 761bbdceefSHannes Frederic Sowa 77b50026b5SHannes Frederic Sowa return __inet6_ehashfn(lhash, lport, fhash, fport, 781bbdceefSHannes Frederic Sowa udp_ipv6_hash_secret + net_hash_mix(net)); 79b50026b5SHannes Frederic Sowa } 80b50026b5SHannes Frederic Sowa 816eada011SEric Dumazet static u32 udp6_portaddr_hash(const struct net *net, 82d4cada4aSEric Dumazet const struct in6_addr *addr6, 83d4cada4aSEric Dumazet unsigned int port) 84d4cada4aSEric Dumazet { 85d4cada4aSEric Dumazet unsigned int hash, mix = net_hash_mix(net); 86d4cada4aSEric Dumazet 87d4cada4aSEric Dumazet if (ipv6_addr_any(addr6)) 88d4cada4aSEric Dumazet hash = jhash_1word(0, mix); 89856540eeSBrian Haley else if (ipv6_addr_v4mapped(addr6)) 900eae88f3SEric Dumazet hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); 91d4cada4aSEric Dumazet else 920eae88f3SEric Dumazet hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); 93d4cada4aSEric Dumazet 94d4cada4aSEric Dumazet return hash ^ port; 95d4cada4aSEric Dumazet } 96d4cada4aSEric Dumazet 976ba5a3c5SPavel Emelyanov int udp_v6_get_port(struct sock *sk, unsigned short snum) 98db8dac20SDavid S. Miller { 9930fff923SEric Dumazet unsigned int hash2_nulladdr = 10030fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); 10130fff923SEric Dumazet unsigned int hash2_partial = 102efe4208fSEric Dumazet udp6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0); 10330fff923SEric Dumazet 104d4cada4aSEric Dumazet /* precompute partial secondary hash */ 10530fff923SEric Dumazet udp_sk(sk)->udp_portaddr_hash = hash2_partial; 10630fff923SEric Dumazet return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); 107db8dac20SDavid S. Miller } 108db8dac20SDavid S. Miller 109719f8358SEric Dumazet static void udp_v6_rehash(struct sock *sk) 110719f8358SEric Dumazet { 111719f8358SEric Dumazet u16 new_hash = udp6_portaddr_hash(sock_net(sk), 112efe4208fSEric Dumazet &sk->sk_v6_rcv_saddr, 113719f8358SEric Dumazet inet_sk(sk)->inet_num); 114719f8358SEric Dumazet 115719f8358SEric Dumazet udp_lib_rehash(sk, new_hash); 116719f8358SEric Dumazet } 117719f8358SEric Dumazet 118d1e37288SSu, Xuemin static int compute_score(struct sock *sk, struct net *net, 11988440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 120d1e37288SSu, Xuemin const struct in6_addr *daddr, unsigned short hnum, 121645ca708SEric Dumazet int dif) 122db8dac20SDavid S. Miller { 12360c04aecSJoe Perches int score; 12460c04aecSJoe Perches struct inet_sock *inet; 125db8dac20SDavid S. Miller 12660c04aecSJoe Perches if (!net_eq(sock_net(sk), net) || 12760c04aecSJoe Perches udp_sk(sk)->udp_port_hash != hnum || 12860c04aecSJoe Perches sk->sk_family != PF_INET6) 12960c04aecSJoe Perches return -1; 130645ca708SEric Dumazet 131645ca708SEric Dumazet score = 0; 13260c04aecSJoe Perches inet = inet_sk(sk); 13360c04aecSJoe Perches 134c720c7e8SEric Dumazet if (inet->inet_dport) { 135c720c7e8SEric Dumazet if (inet->inet_dport != sport) 136645ca708SEric Dumazet return -1; 137db8dac20SDavid S. Miller score++; 138db8dac20SDavid S. Miller } 13960c04aecSJoe Perches 140efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { 141efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) 142645ca708SEric Dumazet return -1; 143db8dac20SDavid S. Miller score++; 144db8dac20SDavid S. Miller } 14560c04aecSJoe Perches 146efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 147efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) 148645ca708SEric Dumazet return -1; 149db8dac20SDavid S. Miller score++; 150db8dac20SDavid S. Miller } 15160c04aecSJoe Perches 152db8dac20SDavid S. Miller if (sk->sk_bound_dev_if) { 153db8dac20SDavid S. Miller if (sk->sk_bound_dev_if != dif) 154645ca708SEric Dumazet return -1; 155db8dac20SDavid S. Miller score++; 156db8dac20SDavid S. Miller } 15760c04aecSJoe Perches 15870da268bSEric Dumazet if (sk->sk_incoming_cpu == raw_smp_processor_id()) 15970da268bSEric Dumazet score++; 16070da268bSEric Dumazet 161645ca708SEric Dumazet return score; 162645ca708SEric Dumazet } 163645ca708SEric Dumazet 164d1e37288SSu, Xuemin /* called with rcu_read_lock() */ 165fddc17deSEric Dumazet static struct sock *udp6_lib_lookup2(struct net *net, 166fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 167fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned int hnum, int dif, 168d1e37288SSu, Xuemin struct udp_hslot *hslot2, 1691134158bSCraig Gallek struct sk_buff *skb) 170fddc17deSEric Dumazet { 171fddc17deSEric Dumazet struct sock *sk, *result; 17272289b96STom Herbert int score, badness, matches = 0, reuseport = 0; 17372289b96STom Herbert u32 hash = 0; 174fddc17deSEric Dumazet 175fddc17deSEric Dumazet result = NULL; 176fddc17deSEric Dumazet badness = -1; 177ca065d0cSEric Dumazet udp_portaddr_for_each_entry_rcu(sk, &hslot2->head) { 178d1e37288SSu, Xuemin score = compute_score(sk, net, saddr, sport, 179fddc17deSEric Dumazet daddr, hnum, dif); 180fddc17deSEric Dumazet if (score > badness) { 18172289b96STom Herbert reuseport = sk->sk_reuseport; 18272289b96STom Herbert if (reuseport) { 183b50026b5SHannes Frederic Sowa hash = udp6_ehashfn(net, daddr, hnum, 18472289b96STom Herbert saddr, sport); 185ed0dfffdSEric Dumazet 186ca065d0cSEric Dumazet result = reuseport_select_sock(sk, hash, skb, 1871134158bSCraig Gallek sizeof(struct udphdr)); 188ca065d0cSEric Dumazet if (result) 189ca065d0cSEric Dumazet return result; 19072289b96STom Herbert matches = 1; 19170da268bSEric Dumazet } 192ca065d0cSEric Dumazet result = sk; 193ca065d0cSEric Dumazet badness = score; 19472289b96STom Herbert } else if (score == badness && reuseport) { 19572289b96STom Herbert matches++; 1968fc54f68SDaniel Borkmann if (reciprocal_scale(hash, matches) == 0) 19772289b96STom Herbert result = sk; 19872289b96STom Herbert hash = next_pseudo_random32(hash); 199fddc17deSEric Dumazet } 200fddc17deSEric Dumazet } 201fddc17deSEric Dumazet return result; 202fddc17deSEric Dumazet } 203fddc17deSEric Dumazet 204ca065d0cSEric Dumazet /* rcu_read_lock() must be held */ 205fce82338SPavel Emelyanov struct sock *__udp6_lib_lookup(struct net *net, 20688440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 20788440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 208538950a1SCraig Gallek int dif, struct udp_table *udptable, 209538950a1SCraig Gallek struct sk_buff *skb) 210645ca708SEric Dumazet { 211271b72c7SEric Dumazet struct sock *sk, *result; 212645ca708SEric Dumazet unsigned short hnum = ntohs(dport); 213fddc17deSEric Dumazet unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); 214fddc17deSEric Dumazet struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; 21572289b96STom Herbert int score, badness, matches = 0, reuseport = 0; 21672289b96STom Herbert u32 hash = 0; 217645ca708SEric Dumazet 218fddc17deSEric Dumazet if (hslot->count > 10) { 219fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, daddr, hnum); 220fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 221fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 222fddc17deSEric Dumazet if (hslot->count < hslot2->count) 223fddc17deSEric Dumazet goto begin; 224fddc17deSEric Dumazet 225fddc17deSEric Dumazet result = udp6_lib_lookup2(net, saddr, sport, 226fddc17deSEric Dumazet daddr, hnum, dif, 227d1e37288SSu, Xuemin hslot2, skb); 228fddc17deSEric Dumazet if (!result) { 229d1e37288SSu, Xuemin unsigned int old_slot2 = slot2; 230fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); 231fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 232d1e37288SSu, Xuemin /* avoid searching the same slot again. */ 233d1e37288SSu, Xuemin if (unlikely(slot2 == old_slot2)) 234d1e37288SSu, Xuemin return result; 235d1e37288SSu, Xuemin 236fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 237fddc17deSEric Dumazet if (hslot->count < hslot2->count) 238fddc17deSEric Dumazet goto begin; 239fddc17deSEric Dumazet 2401223c67cSJorge Boncompte [DTI2] result = udp6_lib_lookup2(net, saddr, sport, 241d1e37288SSu, Xuemin daddr, hnum, dif, 242d1e37288SSu, Xuemin hslot2, skb); 243fddc17deSEric Dumazet } 244fddc17deSEric Dumazet return result; 245fddc17deSEric Dumazet } 246271b72c7SEric Dumazet begin: 247271b72c7SEric Dumazet result = NULL; 248271b72c7SEric Dumazet badness = -1; 249ca065d0cSEric Dumazet sk_for_each_rcu(sk, &hslot->head) { 250d1e37288SSu, Xuemin score = compute_score(sk, net, saddr, sport, daddr, hnum, dif); 251645ca708SEric Dumazet if (score > badness) { 25272289b96STom Herbert reuseport = sk->sk_reuseport; 25372289b96STom Herbert if (reuseport) { 254b50026b5SHannes Frederic Sowa hash = udp6_ehashfn(net, daddr, hnum, 25572289b96STom Herbert saddr, sport); 256ca065d0cSEric Dumazet result = reuseport_select_sock(sk, hash, skb, 257538950a1SCraig Gallek sizeof(struct udphdr)); 258ca065d0cSEric Dumazet if (result) 259ca065d0cSEric Dumazet return result; 26072289b96STom Herbert matches = 1; 26172289b96STom Herbert } 262ca065d0cSEric Dumazet result = sk; 263ca065d0cSEric Dumazet badness = score; 26472289b96STom Herbert } else if (score == badness && reuseport) { 26572289b96STom Herbert matches++; 2668fc54f68SDaniel Borkmann if (reciprocal_scale(hash, matches) == 0) 26772289b96STom Herbert result = sk; 26872289b96STom Herbert hash = next_pseudo_random32(hash); 269db8dac20SDavid S. Miller } 270db8dac20SDavid S. Miller } 271db8dac20SDavid S. Miller return result; 272db8dac20SDavid S. Miller } 273fce82338SPavel Emelyanov EXPORT_SYMBOL_GPL(__udp6_lib_lookup); 274db8dac20SDavid S. Miller 275607c4aafSKOVACS Krisztian static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, 276607c4aafSKOVACS Krisztian __be16 sport, __be16 dport, 277645ca708SEric Dumazet struct udp_table *udptable) 278607c4aafSKOVACS Krisztian { 279b71d1d42SEric Dumazet const struct ipv6hdr *iph = ipv6_hdr(skb); 280ed7cbbceSAlexander Duyck struct sock *sk; 281607c4aafSKOVACS Krisztian 282e5d08d71SIan Morris sk = skb_steal_sock(skb); 283e5d08d71SIan Morris if (unlikely(sk)) 28423542618SKOVACS Krisztian return sk; 285ed7cbbceSAlexander Duyck return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport, 286607c4aafSKOVACS Krisztian &iph->daddr, dport, inet6_iif(skb), 287538950a1SCraig Gallek udptable, skb); 288607c4aafSKOVACS Krisztian } 289607c4aafSKOVACS Krisztian 29063058308STom Herbert struct sock *udp6_lib_lookup_skb(struct sk_buff *skb, 29163058308STom Herbert __be16 sport, __be16 dport) 29263058308STom Herbert { 29363058308STom Herbert const struct ipv6hdr *iph = ipv6_hdr(skb); 29463058308STom Herbert 295ed7cbbceSAlexander Duyck return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport, 29663058308STom Herbert &iph->daddr, dport, inet6_iif(skb), 29763058308STom Herbert &udp_table, skb); 29863058308STom Herbert } 29963058308STom Herbert EXPORT_SYMBOL_GPL(udp6_lib_lookup_skb); 30063058308STom Herbert 301ca065d0cSEric Dumazet /* Must be called under rcu_read_lock(). 302ca065d0cSEric Dumazet * Does increment socket refcount. 303ca065d0cSEric Dumazet */ 304ca065d0cSEric Dumazet #if IS_ENABLED(CONFIG_NETFILTER_XT_MATCH_SOCKET) || \ 305ca065d0cSEric Dumazet IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TPROXY) 306aa976fc0SBalazs Scheidler struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, 307aa976fc0SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, int dif) 308aa976fc0SBalazs Scheidler { 309ca065d0cSEric Dumazet struct sock *sk; 310ca065d0cSEric Dumazet 311ca065d0cSEric Dumazet sk = __udp6_lib_lookup(net, saddr, sport, daddr, dport, 312ca065d0cSEric Dumazet dif, &udp_table, NULL); 313ca065d0cSEric Dumazet if (sk && !atomic_inc_not_zero(&sk->sk_refcnt)) 314ca065d0cSEric Dumazet sk = NULL; 315ca065d0cSEric Dumazet return sk; 316aa976fc0SBalazs Scheidler } 317aa976fc0SBalazs Scheidler EXPORT_SYMBOL_GPL(udp6_lib_lookup); 318ca065d0cSEric Dumazet #endif 319aa976fc0SBalazs Scheidler 320db8dac20SDavid S. Miller /* 321db8dac20SDavid S. Miller * This should be easy, if there is something there we 322db8dac20SDavid S. Miller * return it, otherwise we block. 323db8dac20SDavid S. Miller */ 324db8dac20SDavid S. Miller 3251b784140SYing Xue int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 326db8dac20SDavid S. Miller int noblock, int flags, int *addr_len) 327db8dac20SDavid S. Miller { 328db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 329db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 330db8dac20SDavid S. Miller struct sk_buff *skb; 33159c2cdaeSDavid S. Miller unsigned int ulen, copied; 332627d2d6bSsamanthakumar int peeked, peeking, off; 333db8dac20SDavid S. Miller int err; 334db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 335197c949eSEric Dumazet bool checksum_valid = false; 336f26ba175SWei Yongjun int is_udp4; 3378a74ad60SEric Dumazet bool slow; 338db8dac20SDavid S. Miller 339db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 34085fbaa75SHannes Frederic Sowa return ipv6_recv_error(sk, msg, len, addr_len); 341db8dac20SDavid S. Miller 3424b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 34385fbaa75SHannes Frederic Sowa return ipv6_recv_rxpmtu(sk, msg, len, addr_len); 3444b340ae2SBrian Haley 345db8dac20SDavid S. Miller try_again: 346627d2d6bSsamanthakumar peeking = off = sk_peek_offset(sk, flags); 347db8dac20SDavid S. Miller skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), 3483f518bf7SPavel Emelyanov &peeked, &off, &err); 349db8dac20SDavid S. Miller if (!skb) 350627d2d6bSsamanthakumar return err; 351db8dac20SDavid S. Miller 352e6afc8acSsamanthakumar ulen = skb->len; 35359c2cdaeSDavid S. Miller copied = len; 354627d2d6bSsamanthakumar if (copied > ulen - off) 355627d2d6bSsamanthakumar copied = ulen - off; 35659c2cdaeSDavid S. Miller else if (copied < ulen) 357db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 358db8dac20SDavid S. Miller 359f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 360f26ba175SWei Yongjun 361db8dac20SDavid S. Miller /* 362db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 363db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 364db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 365db8dac20SDavid S. Miller */ 366db8dac20SDavid S. Miller 367627d2d6bSsamanthakumar if (copied < ulen || UDP_SKB_CB(skb)->partial_cov || peeking) { 368197c949eSEric Dumazet checksum_valid = !udp_lib_checksum_complete(skb); 369197c949eSEric Dumazet if (!checksum_valid) 370db8dac20SDavid S. Miller goto csum_copy_err; 371db8dac20SDavid S. Miller } 372db8dac20SDavid S. Miller 373197c949eSEric Dumazet if (checksum_valid || skb_csum_unnecessary(skb)) 374627d2d6bSsamanthakumar err = skb_copy_datagram_msg(skb, off, msg, copied); 375db8dac20SDavid S. Miller else { 376627d2d6bSsamanthakumar err = skb_copy_and_csum_datagram_msg(skb, off, msg); 377db8dac20SDavid S. Miller if (err == -EINVAL) 378db8dac20SDavid S. Miller goto csum_copy_err; 379db8dac20SDavid S. Miller } 38022911fc5SEric Dumazet if (unlikely(err)) { 38122911fc5SEric Dumazet trace_kfree_skb(skb, udpv6_recvmsg); 382979402b1SEric Dumazet if (!peeked) { 383979402b1SEric Dumazet atomic_inc(&sk->sk_drops); 384979402b1SEric Dumazet if (is_udp4) 3856aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, 386979402b1SEric Dumazet is_udplite); 387979402b1SEric Dumazet else 3886aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, 389979402b1SEric Dumazet is_udplite); 390979402b1SEric Dumazet } 391627d2d6bSsamanthakumar skb_free_datagram_locked(sk, skb); 392627d2d6bSsamanthakumar return err; 39322911fc5SEric Dumazet } 394f26ba175SWei Yongjun if (!peeked) { 395f26ba175SWei Yongjun if (is_udp4) 3966aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, 3976aef70a8SEric Dumazet is_udplite); 398f26ba175SWei Yongjun else 3996aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, 4006aef70a8SEric Dumazet is_udplite); 401f26ba175SWei Yongjun } 402db8dac20SDavid S. Miller 4033b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 404db8dac20SDavid S. Miller 405db8dac20SDavid S. Miller /* Copy the address. */ 406db8dac20SDavid S. Miller if (msg->msg_name) { 407342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 408db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 409db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 410db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 411db8dac20SDavid S. Miller 412842df073SHannes Frederic Sowa if (is_udp4) { 413b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 414b301e82cSBrian Haley &sin6->sin6_addr); 415842df073SHannes Frederic Sowa sin6->sin6_scope_id = 0; 416842df073SHannes Frederic Sowa } else { 4174e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr; 418842df073SHannes Frederic Sowa sin6->sin6_scope_id = 419842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin6->sin6_addr, 4204330487aSDuan Jiong inet6_iif(skb)); 421db8dac20SDavid S. Miller } 422bceaa902SHannes Frederic Sowa *addr_len = sizeof(*sin6); 423db8dac20SDavid S. Miller } 4244b261c75SHannes Frederic Sowa 4254b261c75SHannes Frederic Sowa if (np->rxopt.all) 4264b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 4274b261c75SHannes Frederic Sowa 428f26ba175SWei Yongjun if (is_udp4) { 429db8dac20SDavid S. Miller if (inet->cmsg_flags) 430db8dac20SDavid S. Miller ip_cmsg_recv(msg, skb); 431db8dac20SDavid S. Miller } else { 432db8dac20SDavid S. Miller if (np->rxopt.all) 4334b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 434db8dac20SDavid S. Miller } 435db8dac20SDavid S. Miller 43659c2cdaeSDavid S. Miller err = copied; 437db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 438db8dac20SDavid S. Miller err = ulen; 439db8dac20SDavid S. Miller 440627d2d6bSsamanthakumar __skb_free_datagram_locked(sk, skb, peeking ? -err : err); 441db8dac20SDavid S. Miller return err; 442db8dac20SDavid S. Miller 443db8dac20SDavid S. Miller csum_copy_err: 4448a74ad60SEric Dumazet slow = lock_sock_fast(sk); 4450856f939SWei Yongjun if (!skb_kill_datagram(sk, skb, flags)) { 4466a5dc9e5SEric Dumazet if (is_udp4) { 4476aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), 4486a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 4496aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), 4500856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4516a5dc9e5SEric Dumazet } else { 4526aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 4536a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 4546aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 4550856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4560856f939SWei Yongjun } 4576a5dc9e5SEric Dumazet } 4588a74ad60SEric Dumazet unlock_sock_fast(sk, slow); 459db8dac20SDavid S. Miller 460beb39db5SEric Dumazet /* starting over for a new packet, but check if we need to yield */ 461beb39db5SEric Dumazet cond_resched(); 4629cfaa8deSXufeng Zhang msg->msg_flags &= ~MSG_TRUNC; 463db8dac20SDavid S. Miller goto try_again; 464db8dac20SDavid S. Miller } 465db8dac20SDavid S. Miller 466db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 467d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 468645ca708SEric Dumazet struct udp_table *udptable) 469db8dac20SDavid S. Miller { 470db8dac20SDavid S. Miller struct ipv6_pinfo *np; 471b71d1d42SEric Dumazet const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; 472b71d1d42SEric Dumazet const struct in6_addr *saddr = &hdr->saddr; 473b71d1d42SEric Dumazet const struct in6_addr *daddr = &hdr->daddr; 474db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr *)(skb->data+offset); 475db8dac20SDavid S. Miller struct sock *sk; 476e0d8c1b7SWei Wang int harderr; 477db8dac20SDavid S. Miller int err; 4787304fe46SDuan Jiong struct net *net = dev_net(skb->dev); 479db8dac20SDavid S. Miller 480e32ea7e7SCraig Gallek sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source, 481538950a1SCraig Gallek inet6_iif(skb), udptable, skb); 48263159f29SIan Morris if (!sk) { 483a16292a0SEric Dumazet __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev), 4847304fe46SDuan Jiong ICMP6_MIB_INERRORS); 485db8dac20SDavid S. Miller return; 4867304fe46SDuan Jiong } 487db8dac20SDavid S. Miller 488e0d8c1b7SWei Wang harderr = icmpv6_err_convert(type, code, &err); 489e0d8c1b7SWei Wang np = inet6_sk(sk); 490e0d8c1b7SWei Wang 49193b36cf3SHannes Frederic Sowa if (type == ICMPV6_PKT_TOOBIG) { 49293b36cf3SHannes Frederic Sowa if (!ip6_sk_accept_pmtu(sk)) 49393b36cf3SHannes Frederic Sowa goto out; 49481aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info); 495e0d8c1b7SWei Wang if (np->pmtudisc != IPV6_PMTUDISC_DONT) 496e0d8c1b7SWei Wang harderr = 1; 49793b36cf3SHannes Frederic Sowa } 4981a462d18SDuan Jiong if (type == NDISC_REDIRECT) { 499ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk); 5001a462d18SDuan Jiong goto out; 5011a462d18SDuan Jiong } 50281aded24SDavid S. Miller 503e0d8c1b7SWei Wang if (!np->recverr) { 504e0d8c1b7SWei Wang if (!harderr || sk->sk_state != TCP_ESTABLISHED) 505db8dac20SDavid S. Miller goto out; 506e0d8c1b7SWei Wang } else { 507db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 508e0d8c1b7SWei Wang } 509b1faf566SEric Dumazet 510db8dac20SDavid S. Miller sk->sk_err = err; 511db8dac20SDavid S. Miller sk->sk_error_report(sk); 512db8dac20SDavid S. Miller out: 513ca065d0cSEric Dumazet return; 514db8dac20SDavid S. Miller } 515db8dac20SDavid S. Miller 516f7ad74feSBenjamin LaHaise static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 517f7ad74feSBenjamin LaHaise { 518f7ad74feSBenjamin LaHaise int rc; 519f7ad74feSBenjamin LaHaise 520efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 521f7ad74feSBenjamin LaHaise sock_rps_save_rxhash(sk, skb); 522005ec974SShawn Bohrer sk_mark_napi_id(sk, skb); 5232c8c56e1SEric Dumazet sk_incoming_cpu_update(sk); 524005ec974SShawn Bohrer } 525f7ad74feSBenjamin LaHaise 526e6afc8acSsamanthakumar rc = __sock_queue_rcv_skb(sk, skb); 527f7ad74feSBenjamin LaHaise if (rc < 0) { 528f7ad74feSBenjamin LaHaise int is_udplite = IS_UDPLITE(sk); 529f7ad74feSBenjamin LaHaise 530f7ad74feSBenjamin LaHaise /* Note that an ENOMEM error is charged twice */ 531f7ad74feSBenjamin LaHaise if (rc == -ENOMEM) 532e61da9e2SEric Dumazet UDP6_INC_STATS(sock_net(sk), 533f7ad74feSBenjamin LaHaise UDP_MIB_RCVBUFERRORS, is_udplite); 534e61da9e2SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 535f7ad74feSBenjamin LaHaise kfree_skb(skb); 536f7ad74feSBenjamin LaHaise return -1; 537f7ad74feSBenjamin LaHaise } 538f7ad74feSBenjamin LaHaise return 0; 539f7ad74feSBenjamin LaHaise } 540f7ad74feSBenjamin LaHaise 541db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 542d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 543d5fdd6baSBrian Haley u8 code, int offset, __be32 info) 544db8dac20SDavid S. Miller { 545645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 546db8dac20SDavid S. Miller } 547db8dac20SDavid S. Miller 548d7f3f621SBenjamin LaHaise static struct static_key udpv6_encap_needed __read_mostly; 549d7f3f621SBenjamin LaHaise void udpv6_encap_enable(void) 550d7f3f621SBenjamin LaHaise { 551d7f3f621SBenjamin LaHaise if (!static_key_enabled(&udpv6_encap_needed)) 552d7f3f621SBenjamin LaHaise static_key_slow_inc(&udpv6_encap_needed); 553d7f3f621SBenjamin LaHaise } 554d7f3f621SBenjamin LaHaise EXPORT_SYMBOL(udpv6_encap_enable); 555d7f3f621SBenjamin LaHaise 556db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 557db8dac20SDavid S. Miller { 558db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 559db8dac20SDavid S. Miller int rc; 560db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 561db8dac20SDavid S. Miller 562db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 563db8dac20SDavid S. Miller goto drop; 564db8dac20SDavid S. Miller 565d7f3f621SBenjamin LaHaise if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 566d7f3f621SBenjamin LaHaise int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); 567d7f3f621SBenjamin LaHaise 568d7f3f621SBenjamin LaHaise /* 569d7f3f621SBenjamin LaHaise * This is an encapsulation socket so pass the skb to 570d7f3f621SBenjamin LaHaise * the socket's udp_encap_rcv() hook. Otherwise, just 571d7f3f621SBenjamin LaHaise * fall through and pass this up the UDP socket. 572d7f3f621SBenjamin LaHaise * up->encap_rcv() returns the following value: 573d7f3f621SBenjamin LaHaise * =0 if skb was successfully passed to the encap 574d7f3f621SBenjamin LaHaise * handler or was discarded by it. 575d7f3f621SBenjamin LaHaise * >0 if skb should be passed on to UDP. 576d7f3f621SBenjamin LaHaise * <0 if skb should be resubmitted as proto -N 577d7f3f621SBenjamin LaHaise */ 578d7f3f621SBenjamin LaHaise 579d7f3f621SBenjamin LaHaise /* if we're overly short, let UDP handle it */ 580d7f3f621SBenjamin LaHaise encap_rcv = ACCESS_ONCE(up->encap_rcv); 581e5aed006SHannes Frederic Sowa if (encap_rcv) { 582d7f3f621SBenjamin LaHaise int ret; 583d7f3f621SBenjamin LaHaise 5840a80966bSTom Herbert /* Verify checksum before giving to encap */ 5850a80966bSTom Herbert if (udp_lib_checksum_complete(skb)) 5860a80966bSTom Herbert goto csum_error; 5870a80966bSTom Herbert 588d7f3f621SBenjamin LaHaise ret = encap_rcv(sk, skb); 589d7f3f621SBenjamin LaHaise if (ret <= 0) { 59002c22347SEric Dumazet __UDP_INC_STATS(sock_net(sk), 591d7f3f621SBenjamin LaHaise UDP_MIB_INDATAGRAMS, 592d7f3f621SBenjamin LaHaise is_udplite); 593d7f3f621SBenjamin LaHaise return -ret; 594d7f3f621SBenjamin LaHaise } 595d7f3f621SBenjamin LaHaise } 596d7f3f621SBenjamin LaHaise 597d7f3f621SBenjamin LaHaise /* FALLTHROUGH -- it's a UDP Packet */ 598d7f3f621SBenjamin LaHaise } 599d7f3f621SBenjamin LaHaise 600db8dac20SDavid S. Miller /* 601db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 602db8dac20SDavid S. Miller */ 603db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 604db8dac20SDavid S. Miller 605db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 606ba7a46f1SJoe Perches net_dbg_ratelimited("UDPLITE6: partial coverage %d while full coverage %d requested\n", 607db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 608db8dac20SDavid S. Miller goto drop; 609db8dac20SDavid S. Miller } 610db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 611ba7a46f1SJoe Perches net_dbg_ratelimited("UDPLITE6: coverage %d too small, need min %d\n", 612db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 613db8dac20SDavid S. Miller goto drop; 614db8dac20SDavid S. Miller } 615db8dac20SDavid S. Miller } 616db8dac20SDavid S. Miller 617ce25d66aSEric Dumazet if (rcu_access_pointer(sk->sk_filter) && 618ce25d66aSEric Dumazet udp_lib_checksum_complete(skb)) 6196a5dc9e5SEric Dumazet goto csum_error; 620ce25d66aSEric Dumazet 621ba66bbe5SDaniel Borkmann if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr))) 622a6127697SMichal Kubeček goto drop; 623db8dac20SDavid S. Miller 624e6afc8acSsamanthakumar udp_csum_pull_header(skb); 625274f482dSSorin Dumitru if (sk_rcvqueues_full(sk, sk->sk_rcvbuf)) { 62602c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), 6273e215c8dSJames M Leddy UDP_MIB_RCVBUFERRORS, is_udplite); 628cb80ef46SBenjamin LaHaise goto drop; 6293e215c8dSJames M Leddy } 630cb80ef46SBenjamin LaHaise 631d826eb14SEric Dumazet skb_dst_drop(skb); 632db8dac20SDavid S. Miller 633cb80ef46SBenjamin LaHaise bh_lock_sock(sk); 634cb80ef46SBenjamin LaHaise rc = 0; 635cb80ef46SBenjamin LaHaise if (!sock_owned_by_user(sk)) 636f7ad74feSBenjamin LaHaise rc = __udpv6_queue_rcv_skb(sk, skb); 637cb80ef46SBenjamin LaHaise else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { 638cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 639cb80ef46SBenjamin LaHaise goto drop; 640cb80ef46SBenjamin LaHaise } 641cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 642f7ad74feSBenjamin LaHaise 643f7ad74feSBenjamin LaHaise return rc; 6443e215c8dSJames M Leddy 6456a5dc9e5SEric Dumazet csum_error: 64602c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); 647db8dac20SDavid S. Miller drop: 64802c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 649cb80ef46SBenjamin LaHaise atomic_inc(&sk->sk_drops); 650db8dac20SDavid S. Miller kfree_skb(skb); 651db8dac20SDavid S. Miller return -1; 652db8dac20SDavid S. Miller } 653db8dac20SDavid S. Miller 6545cf3d461SDavid Held static bool __udp_v6_is_mcast_sock(struct net *net, struct sock *sk, 655b71d1d42SEric Dumazet __be16 loc_port, const struct in6_addr *loc_addr, 656b71d1d42SEric Dumazet __be16 rmt_port, const struct in6_addr *rmt_addr, 6575cf3d461SDavid Held int dif, unsigned short hnum) 658db8dac20SDavid S. Miller { 6599e89fd8bSSven Wegener struct inet_sock *inet = inet_sk(sk); 660db8dac20SDavid S. Miller 6619e89fd8bSSven Wegener if (!net_eq(sock_net(sk), net)) 6625cf3d461SDavid Held return false; 663b8ad0cbcSDaniel Lezcano 6645cf3d461SDavid Held if (udp_sk(sk)->udp_port_hash != hnum || 6655cf3d461SDavid Held sk->sk_family != PF_INET6 || 6665cf3d461SDavid Held (inet->inet_dport && inet->inet_dport != rmt_port) || 6675cf3d461SDavid Held (!ipv6_addr_any(&sk->sk_v6_daddr) && 6685cf3d461SDavid Held !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) || 66933b4b015SHenning Rogge (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) || 67033b4b015SHenning Rogge (!ipv6_addr_any(&sk->sk_v6_rcv_saddr) && 67133b4b015SHenning Rogge !ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))) 6725cf3d461SDavid Held return false; 6739e89fd8bSSven Wegener if (!inet6_mc_check(sk, loc_addr, rmt_addr)) 6745cf3d461SDavid Held return false; 6755cf3d461SDavid Held return true; 676db8dac20SDavid S. Miller } 677db8dac20SDavid S. Miller 6784068579eSTom Herbert static void udp6_csum_zero_error(struct sk_buff *skb) 6794068579eSTom Herbert { 6804068579eSTom Herbert /* RFC 2460 section 8.1 says that we SHOULD log 6814068579eSTom Herbert * this error. Well, it is reasonable. 6824068579eSTom Herbert */ 683ba7a46f1SJoe Perches net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n", 6844068579eSTom Herbert &ipv6_hdr(skb)->saddr, ntohs(udp_hdr(skb)->source), 6854068579eSTom Herbert &ipv6_hdr(skb)->daddr, ntohs(udp_hdr(skb)->dest)); 6864068579eSTom Herbert } 6874068579eSTom Herbert 688db8dac20SDavid S. Miller /* 689db8dac20SDavid S. Miller * Note: called only from the BH handler context, 690db8dac20SDavid S. Miller * so we don't need to lock the hashes. 691db8dac20SDavid S. Miller */ 692e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 693b71d1d42SEric Dumazet const struct in6_addr *saddr, const struct in6_addr *daddr, 69436cbb245SRick Jones struct udp_table *udptable, int proto) 695db8dac20SDavid S. Miller { 696ca065d0cSEric Dumazet struct sock *sk, *first = NULL; 697db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 6985cf3d461SDavid Held unsigned short hnum = ntohs(uh->dest); 6995cf3d461SDavid Held struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum); 700ca065d0cSEric Dumazet unsigned int offset = offsetof(typeof(*sk), sk_node); 7012dc41cffSDavid Held unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10); 702ca065d0cSEric Dumazet int dif = inet6_iif(skb); 703ca065d0cSEric Dumazet struct hlist_node *node; 704ca065d0cSEric Dumazet struct sk_buff *nskb; 7052dc41cffSDavid Held 7062dc41cffSDavid Held if (use_hash2) { 7072dc41cffSDavid Held hash2_any = udp6_portaddr_hash(net, &in6addr_any, hnum) & 7082dc41cffSDavid Held udp_table.mask; 7092dc41cffSDavid Held hash2 = udp6_portaddr_hash(net, daddr, hnum) & udp_table.mask; 7102dc41cffSDavid Held start_lookup: 7112dc41cffSDavid Held hslot = &udp_table.hash2[hash2]; 7122dc41cffSDavid Held offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node); 7132dc41cffSDavid Held } 714db8dac20SDavid S. Miller 715ca065d0cSEric Dumazet sk_for_each_entry_offset_rcu(sk, node, &hslot->head, offset) { 716ca065d0cSEric Dumazet if (!__udp_v6_is_mcast_sock(net, sk, uh->dest, daddr, 717ca065d0cSEric Dumazet uh->source, saddr, dif, hnum)) 718ca065d0cSEric Dumazet continue; 7191c19448cSTom Herbert /* If zero checksum and no_check is not on for 7204068579eSTom Herbert * the socket then skip it. 7214068579eSTom Herbert */ 722ca065d0cSEric Dumazet if (!uh->check && !udp_sk(sk)->no_check6_rx) 723ca065d0cSEric Dumazet continue; 724ca065d0cSEric Dumazet if (!first) { 725ca065d0cSEric Dumazet first = sk; 726ca065d0cSEric Dumazet continue; 727db8dac20SDavid S. Miller } 728ca065d0cSEric Dumazet nskb = skb_clone(skb, GFP_ATOMIC); 729ca065d0cSEric Dumazet if (unlikely(!nskb)) { 730ca065d0cSEric Dumazet atomic_inc(&sk->sk_drops); 73102c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_RCVBUFERRORS, 732ca065d0cSEric Dumazet IS_UDPLITE(sk)); 73302c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_INERRORS, 734ca065d0cSEric Dumazet IS_UDPLITE(sk)); 735ca065d0cSEric Dumazet continue; 736a1ab77f9SEric Dumazet } 737db8dac20SDavid S. Miller 738ca065d0cSEric Dumazet if (udpv6_queue_rcv_skb(sk, nskb) > 0) 739ca065d0cSEric Dumazet consume_skb(nskb); 740ca065d0cSEric Dumazet } 741a1ab77f9SEric Dumazet 7422dc41cffSDavid Held /* Also lookup *:port if we are using hash2 and haven't done so yet. */ 7432dc41cffSDavid Held if (use_hash2 && hash2 != hash2_any) { 7442dc41cffSDavid Held hash2 = hash2_any; 7452dc41cffSDavid Held goto start_lookup; 7462dc41cffSDavid Held } 7472dc41cffSDavid Held 748ca065d0cSEric Dumazet if (first) { 749ca065d0cSEric Dumazet if (udpv6_queue_rcv_skb(first, skb) > 0) 750ca065d0cSEric Dumazet consume_skb(skb); 751a1ab77f9SEric Dumazet } else { 752ca065d0cSEric Dumazet kfree_skb(skb); 75302c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_IGNOREDMULTI, 75436cbb245SRick Jones proto == IPPROTO_UDPLITE); 755a1ab77f9SEric Dumazet } 756db8dac20SDavid S. Miller return 0; 757db8dac20SDavid S. Miller } 758db8dac20SDavid S. Miller 759645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 760db8dac20SDavid S. Miller int proto) 761db8dac20SDavid S. Miller { 762b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 763ca065d0cSEric Dumazet struct net *net = dev_net(skb->dev); 764ca065d0cSEric Dumazet struct udphdr *uh; 765ca065d0cSEric Dumazet struct sock *sk; 766db8dac20SDavid S. Miller u32 ulen = 0; 767db8dac20SDavid S. Miller 768db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 769d6bc0149SBjørn Mork goto discard; 770db8dac20SDavid S. Miller 771db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 772db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 773db8dac20SDavid S. Miller uh = udp_hdr(skb); 774db8dac20SDavid S. Miller 775db8dac20SDavid S. Miller ulen = ntohs(uh->len); 776db8dac20SDavid S. Miller if (ulen > skb->len) 777db8dac20SDavid S. Miller goto short_packet; 778db8dac20SDavid S. Miller 779db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 780db8dac20SDavid S. Miller /* UDP validates ulen. */ 781db8dac20SDavid S. Miller 782db8dac20SDavid S. Miller /* Check for jumbo payload */ 783db8dac20SDavid S. Miller if (ulen == 0) 784db8dac20SDavid S. Miller ulen = skb->len; 785db8dac20SDavid S. Miller 786db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 787db8dac20SDavid S. Miller goto short_packet; 788db8dac20SDavid S. Miller 789db8dac20SDavid S. Miller if (ulen < skb->len) { 790db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 791db8dac20SDavid S. Miller goto short_packet; 792db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 793db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 794db8dac20SDavid S. Miller uh = udp_hdr(skb); 795db8dac20SDavid S. Miller } 796db8dac20SDavid S. Miller } 797db8dac20SDavid S. Miller 798db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 7996a5dc9e5SEric Dumazet goto csum_error; 800db8dac20SDavid S. Miller 801db8dac20SDavid S. Miller /* 802db8dac20SDavid S. Miller * Multicast receive code 803db8dac20SDavid S. Miller */ 804db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 805e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 80636cbb245SRick Jones saddr, daddr, udptable, proto); 807db8dac20SDavid S. Miller 808db8dac20SDavid S. Miller /* Unicast */ 809db8dac20SDavid S. Miller 810db8dac20SDavid S. Miller /* 811db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 812db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 813db8dac20SDavid S. Miller */ 814607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 81553b24b8fSIan Morris if (sk) { 816a5b50476SEliezer Tamir int ret; 817a5b50476SEliezer Tamir 8181c19448cSTom Herbert if (!uh->check && !udp_sk(sk)->no_check6_rx) { 8194068579eSTom Herbert udp6_csum_zero_error(skb); 8204068579eSTom Herbert goto csum_error; 8214068579eSTom Herbert } 8224068579eSTom Herbert 823224d019cSTom Herbert if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk)) 8242abb7cdcSTom Herbert skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check, 8252abb7cdcSTom Herbert ip6_compute_pseudo); 8262abb7cdcSTom Herbert 827a5b50476SEliezer Tamir ret = udpv6_queue_rcv_skb(sk, skb); 828db8dac20SDavid S. Miller 82959dca1d8SBill Sommerfeld /* a return value > 0 means to resubmit the input */ 830cb80ef46SBenjamin LaHaise if (ret > 0) 83159dca1d8SBill Sommerfeld return ret; 832cb80ef46SBenjamin LaHaise 833cb80ef46SBenjamin LaHaise return 0; 834cb80ef46SBenjamin LaHaise } 835cb80ef46SBenjamin LaHaise 8364068579eSTom Herbert if (!uh->check) { 8374068579eSTom Herbert udp6_csum_zero_error(skb); 8384068579eSTom Herbert goto csum_error; 8394068579eSTom Herbert } 8404068579eSTom Herbert 841db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 842db8dac20SDavid S. Miller goto discard; 843db8dac20SDavid S. Miller 844db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 8456a5dc9e5SEric Dumazet goto csum_error; 846db8dac20SDavid S. Miller 84702c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); 8483ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 849db8dac20SDavid S. Miller 850db8dac20SDavid S. Miller kfree_skb(skb); 851db8dac20SDavid S. Miller return 0; 852db8dac20SDavid S. Miller 853db8dac20SDavid S. Miller short_packet: 854ba7a46f1SJoe Perches net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 855db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 856ba7a46f1SJoe Perches saddr, ntohs(uh->source), 857ba7a46f1SJoe Perches ulen, skb->len, 858ba7a46f1SJoe Perches daddr, ntohs(uh->dest)); 8596a5dc9e5SEric Dumazet goto discard; 8606a5dc9e5SEric Dumazet csum_error: 86102c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); 862db8dac20SDavid S. Miller discard: 86302c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 864db8dac20SDavid S. Miller kfree_skb(skb); 865db8dac20SDavid S. Miller return 0; 866db8dac20SDavid S. Miller } 867db8dac20SDavid S. Miller 868db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 869db8dac20SDavid S. Miller { 870645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 871db8dac20SDavid S. Miller } 872db8dac20SDavid S. Miller 873db8dac20SDavid S. Miller /* 874db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 875db8dac20SDavid S. Miller */ 876db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 877db8dac20SDavid S. Miller { 878db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 879db8dac20SDavid S. Miller 88036d926b9SDenis V. Lunev if (up->pending == AF_INET) 88136d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 88236d926b9SDenis V. Lunev else if (up->pending) { 883db8dac20SDavid S. Miller up->len = 0; 884db8dac20SDavid S. Miller up->pending = 0; 885db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 886db8dac20SDavid S. Miller } 887db8dac20SDavid S. Miller } 888db8dac20SDavid S. Miller 889493c6be3SSridhar Samudrala /** 890493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 891493c6be3SSridhar Samudrala * @sk: socket we are sending on 892493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 893493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 894493c6be3SSridhar Samudrala */ 895493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 896493c6be3SSridhar Samudrala const struct in6_addr *saddr, 897493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 898493c6be3SSridhar Samudrala { 899493c6be3SSridhar Samudrala unsigned int offset; 900493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 901d39d938cSVlad Yasevich struct sk_buff *frags = skb_shinfo(skb)->frag_list; 902493c6be3SSridhar Samudrala __wsum csum = 0; 903493c6be3SSridhar Samudrala 904d39d938cSVlad Yasevich if (!frags) { 905493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 906493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 907493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 908493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 909493c6be3SSridhar Samudrala } else { 910493c6be3SSridhar Samudrala /* 911493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 912493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 913493c6be3SSridhar Samudrala * should be together 914493c6be3SSridhar Samudrala */ 915493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 916493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 917493c6be3SSridhar Samudrala 918493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 919493c6be3SSridhar Samudrala 920d39d938cSVlad Yasevich do { 921d39d938cSVlad Yasevich csum = csum_add(csum, frags->csum); 922d39d938cSVlad Yasevich } while ((frags = frags->next)); 923493c6be3SSridhar Samudrala 924493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 925493c6be3SSridhar Samudrala csum); 926493c6be3SSridhar Samudrala if (uh->check == 0) 927493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 928493c6be3SSridhar Samudrala } 929493c6be3SSridhar Samudrala } 930493c6be3SSridhar Samudrala 931db8dac20SDavid S. Miller /* 932db8dac20SDavid S. Miller * Sending 933db8dac20SDavid S. Miller */ 934db8dac20SDavid S. Miller 935d39d938cSVlad Yasevich static int udp_v6_send_skb(struct sk_buff *skb, struct flowi6 *fl6) 936db8dac20SDavid S. Miller { 937d39d938cSVlad Yasevich struct sock *sk = skb->sk; 938db8dac20SDavid S. Miller struct udphdr *uh; 939db8dac20SDavid S. Miller int err = 0; 940db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 941db8dac20SDavid S. Miller __wsum csum = 0; 942d39d938cSVlad Yasevich int offset = skb_transport_offset(skb); 943d39d938cSVlad Yasevich int len = skb->len - offset; 944db8dac20SDavid S. Miller 945db8dac20SDavid S. Miller /* 946db8dac20SDavid S. Miller * Create a UDP header 947db8dac20SDavid S. Miller */ 948db8dac20SDavid S. Miller uh = udp_hdr(skb); 9491958b856SDavid S. Miller uh->source = fl6->fl6_sport; 9501958b856SDavid S. Miller uh->dest = fl6->fl6_dport; 951d39d938cSVlad Yasevich uh->len = htons(len); 952db8dac20SDavid S. Miller uh->check = 0; 953db8dac20SDavid S. Miller 954db8dac20SDavid S. Miller if (is_udplite) 955d39d938cSVlad Yasevich csum = udplite_csum(skb); 956d39d938cSVlad Yasevich else if (udp_sk(sk)->no_check6_tx) { /* UDP csum disabled */ 9574068579eSTom Herbert skb->ip_summed = CHECKSUM_NONE; 9584068579eSTom Herbert goto send; 9594068579eSTom Herbert } else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 960d39d938cSVlad Yasevich udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, len); 961493c6be3SSridhar Samudrala goto send; 962493c6be3SSridhar Samudrala } else 963d39d938cSVlad Yasevich csum = udp_csum(skb); 964db8dac20SDavid S. Miller 965db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 9664c9483b2SDavid S. Miller uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 967d39d938cSVlad Yasevich len, fl6->flowi6_proto, csum); 968db8dac20SDavid S. Miller if (uh->check == 0) 969db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 970db8dac20SDavid S. Miller 971493c6be3SSridhar Samudrala send: 972d39d938cSVlad Yasevich err = ip6_send_skb(skb); 9736ce9e7b5SEric Dumazet if (err) { 9746ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 9756aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 9766ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 9776ce9e7b5SEric Dumazet err = 0; 9786ce9e7b5SEric Dumazet } 9796aef70a8SEric Dumazet } else { 9806aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 9816ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 9826aef70a8SEric Dumazet } 983d39d938cSVlad Yasevich return err; 984d39d938cSVlad Yasevich } 985d39d938cSVlad Yasevich 986d39d938cSVlad Yasevich static int udp_v6_push_pending_frames(struct sock *sk) 987d39d938cSVlad Yasevich { 988d39d938cSVlad Yasevich struct sk_buff *skb; 989d39d938cSVlad Yasevich struct udp_sock *up = udp_sk(sk); 990d39d938cSVlad Yasevich struct flowi6 fl6; 991d39d938cSVlad Yasevich int err = 0; 992d39d938cSVlad Yasevich 993d39d938cSVlad Yasevich if (up->pending == AF_INET) 994d39d938cSVlad Yasevich return udp_push_pending_frames(sk); 995d39d938cSVlad Yasevich 996d39d938cSVlad Yasevich /* ip6_finish_skb will release the cork, so make a copy of 997d39d938cSVlad Yasevich * fl6 here. 998d39d938cSVlad Yasevich */ 999d39d938cSVlad Yasevich fl6 = inet_sk(sk)->cork.fl.u.ip6; 1000d39d938cSVlad Yasevich 1001d39d938cSVlad Yasevich skb = ip6_finish_skb(sk); 1002d39d938cSVlad Yasevich if (!skb) 1003d39d938cSVlad Yasevich goto out; 1004d39d938cSVlad Yasevich 1005d39d938cSVlad Yasevich err = udp_v6_send_skb(skb, &fl6); 1006d39d938cSVlad Yasevich 1007db8dac20SDavid S. Miller out: 1008db8dac20SDavid S. Miller up->len = 0; 1009db8dac20SDavid S. Miller up->pending = 0; 1010db8dac20SDavid S. Miller return err; 1011db8dac20SDavid S. Miller } 1012db8dac20SDavid S. Miller 10131b784140SYing Xue int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) 1014db8dac20SDavid S. Miller { 1015db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 1016db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 1017db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 1018db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 1019342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 102020c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 1021db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 102245f6fad8SEric Dumazet struct ipv6_txoptions *opt_to_free = NULL; 1023db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 10244c9483b2SDavid S. Miller struct flowi6 fl6; 1025db8dac20SDavid S. Miller struct dst_entry *dst; 102626879da5SWei Wang struct ipcm6_cookie ipc6; 1027db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 1028db8dac20SDavid S. Miller int ulen = len; 1029db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 1030db8dac20SDavid S. Miller int err; 1031db8dac20SDavid S. Miller int connected = 0; 1032db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 1033db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 1034ad1e46a8SSoheil Hassas Yeganeh struct sockcm_cookie sockc; 1035db8dac20SDavid S. Miller 103626879da5SWei Wang ipc6.hlimit = -1; 103726879da5SWei Wang ipc6.tclass = -1; 103826879da5SWei Wang ipc6.dontfrag = -1; 103926879da5SWei Wang 1040db8dac20SDavid S. Miller /* destination address check */ 1041db8dac20SDavid S. Miller if (sin6) { 1042db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 1043db8dac20SDavid S. Miller return -EINVAL; 1044db8dac20SDavid S. Miller 1045db8dac20SDavid S. Miller switch (sin6->sin6_family) { 1046db8dac20SDavid S. Miller case AF_INET6: 1047db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 1048db8dac20SDavid S. Miller return -EINVAL; 1049db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1050db8dac20SDavid S. Miller break; 1051db8dac20SDavid S. Miller case AF_INET: 1052db8dac20SDavid S. Miller goto do_udp_sendmsg; 1053db8dac20SDavid S. Miller case AF_UNSPEC: 1054db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 1055db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 1056db8dac20SDavid S. Miller daddr = NULL; 1057db8dac20SDavid S. Miller break; 1058db8dac20SDavid S. Miller default: 1059db8dac20SDavid S. Miller return -EINVAL; 1060db8dac20SDavid S. Miller } 1061db8dac20SDavid S. Miller } else if (!up->pending) { 1062db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1063db8dac20SDavid S. Miller return -EDESTADDRREQ; 1064efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1065db8dac20SDavid S. Miller } else 1066db8dac20SDavid S. Miller daddr = NULL; 1067db8dac20SDavid S. Miller 1068db8dac20SDavid S. Miller if (daddr) { 1069db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 1070db8dac20SDavid S. Miller struct sockaddr_in sin; 1071db8dac20SDavid S. Miller sin.sin_family = AF_INET; 1072c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 1073db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1074db8dac20SDavid S. Miller msg->msg_name = &sin; 1075db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 1076db8dac20SDavid S. Miller do_udp_sendmsg: 1077db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 1078db8dac20SDavid S. Miller return -ENETUNREACH; 10791b784140SYing Xue return udp_sendmsg(sk, msg, len); 1080db8dac20SDavid S. Miller } 1081db8dac20SDavid S. Miller } 1082db8dac20SDavid S. Miller 1083db8dac20SDavid S. Miller if (up->pending == AF_INET) 10841b784140SYing Xue return udp_sendmsg(sk, msg, len); 1085db8dac20SDavid S. Miller 1086db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1087db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1088db8dac20SDavid S. Miller */ 1089db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1090db8dac20SDavid S. Miller return -EMSGSIZE; 1091db8dac20SDavid S. Miller 109203485f2aSVlad Yasevich getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1093db8dac20SDavid S. Miller if (up->pending) { 1094db8dac20SDavid S. Miller /* 1095db8dac20SDavid S. Miller * There are pending frames. 1096db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1097db8dac20SDavid S. Miller */ 1098db8dac20SDavid S. Miller lock_sock(sk); 1099db8dac20SDavid S. Miller if (likely(up->pending)) { 1100db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1101db8dac20SDavid S. Miller release_sock(sk); 1102db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1103db8dac20SDavid S. Miller } 1104db8dac20SDavid S. Miller dst = NULL; 1105db8dac20SDavid S. Miller goto do_append_data; 1106db8dac20SDavid S. Miller } 1107db8dac20SDavid S. Miller release_sock(sk); 1108db8dac20SDavid S. Miller } 1109db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1110db8dac20SDavid S. Miller 11114c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 1112db8dac20SDavid S. Miller 1113db8dac20SDavid S. Miller if (sin6) { 1114db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1115db8dac20SDavid S. Miller return -EINVAL; 1116db8dac20SDavid S. Miller 11171958b856SDavid S. Miller fl6.fl6_dport = sin6->sin6_port; 1118db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1119db8dac20SDavid S. Miller 1120db8dac20SDavid S. Miller if (np->sndflow) { 11214c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 11224c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 11234c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 112463159f29SIan Morris if (!flowlabel) 1125db8dac20SDavid S. Miller return -EINVAL; 1126db8dac20SDavid S. Miller } 1127db8dac20SDavid S. Miller } 1128db8dac20SDavid S. Miller 1129db8dac20SDavid S. Miller /* 1130db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1131db8dac20SDavid S. Miller * sk->sk_dst_cache. 1132db8dac20SDavid S. Miller */ 1133db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1134efe4208fSEric Dumazet ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) 1135efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1136db8dac20SDavid S. Miller 1137db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1138db8dac20SDavid S. Miller sin6->sin6_scope_id && 1139842df073SHannes Frederic Sowa __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) 11404c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 1141db8dac20SDavid S. Miller } else { 1142db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1143db8dac20SDavid S. Miller return -EDESTADDRREQ; 1144db8dac20SDavid S. Miller 11451958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 1146efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 11474c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 1148db8dac20SDavid S. Miller connected = 1; 1149db8dac20SDavid S. Miller } 1150db8dac20SDavid S. Miller 11514c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11524c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 1153db8dac20SDavid S. Miller 11544c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11554c9483b2SDavid S. Miller fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 11569f690db7SYang Hongyang 11574c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 1158c14ac945SSoheil Hassas Yeganeh sockc.tsflags = sk->sk_tsflags; 115951953d5bSBrian Haley 1160db8dac20SDavid S. Miller if (msg->msg_controllen) { 1161db8dac20SDavid S. Miller opt = &opt_space; 1162db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1163db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 116426879da5SWei Wang ipc6.opt = opt; 1165db8dac20SDavid S. Miller 116626879da5SWei Wang err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6, &sockc); 1167db8dac20SDavid S. Miller if (err < 0) { 1168db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1169db8dac20SDavid S. Miller return err; 1170db8dac20SDavid S. Miller } 11714c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 11724c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 117363159f29SIan Morris if (!flowlabel) 1174db8dac20SDavid S. Miller return -EINVAL; 1175db8dac20SDavid S. Miller } 1176db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1177db8dac20SDavid S. Miller opt = NULL; 1178db8dac20SDavid S. Miller connected = 0; 1179db8dac20SDavid S. Miller } 118045f6fad8SEric Dumazet if (!opt) { 118145f6fad8SEric Dumazet opt = txopt_get(np); 118245f6fad8SEric Dumazet opt_to_free = opt; 118345f6fad8SEric Dumazet } 1184db8dac20SDavid S. Miller if (flowlabel) 1185db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1186db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 118726879da5SWei Wang ipc6.opt = opt; 1188db8dac20SDavid S. Miller 11894c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 1190876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 11914e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr; 1192876c7f41SBrian Haley else 11934c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 11944c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 11954e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 11961958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 1197db8dac20SDavid S. Miller 11984c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 119920c59de2SArnaud Ebalard if (final_p) 1200db8dac20SDavid S. Miller connected = 0; 1201db8dac20SDavid S. Miller 12024c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { 12034c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 1204db8dac20SDavid S. Miller connected = 0; 1205c4062dfcSErich E. Hoover } else if (!fl6.flowi6_oif) 1206c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif; 1207db8dac20SDavid S. Miller 12084c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 1209db8dac20SDavid S. Miller 121038b7097bSHannes Frederic Sowa if (ipc6.tclass < 0) 121138b7097bSHannes Frederic Sowa ipc6.tclass = np->tclass; 121238b7097bSHannes Frederic Sowa 121338b7097bSHannes Frederic Sowa fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel); 121438b7097bSHannes Frederic Sowa 12150e0d44abSSteffen Klassert dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p); 121668d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 121768d0c6d3SDavid S. Miller err = PTR_ERR(dst); 121868d0c6d3SDavid S. Miller dst = NULL; 1219db8dac20SDavid S. Miller goto out; 1220db8dac20SDavid S. Miller } 1221db8dac20SDavid S. Miller 122226879da5SWei Wang if (ipc6.hlimit < 0) 122326879da5SWei Wang ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); 1224db8dac20SDavid S. Miller 1225db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1226db8dac20SDavid S. Miller goto do_confirm; 1227db8dac20SDavid S. Miller back_from_confirm: 1228db8dac20SDavid S. Miller 122903485f2aSVlad Yasevich /* Lockless fast path for the non-corking case */ 123003485f2aSVlad Yasevich if (!corkreq) { 123103485f2aSVlad Yasevich struct sk_buff *skb; 123203485f2aSVlad Yasevich 123303485f2aSVlad Yasevich skb = ip6_make_skb(sk, getfrag, msg, ulen, 123426879da5SWei Wang sizeof(struct udphdr), &ipc6, 123503485f2aSVlad Yasevich &fl6, (struct rt6_info *)dst, 123626879da5SWei Wang msg->msg_flags, &sockc); 123703485f2aSVlad Yasevich err = PTR_ERR(skb); 123803485f2aSVlad Yasevich if (!IS_ERR_OR_NULL(skb)) 123903485f2aSVlad Yasevich err = udp_v6_send_skb(skb, &fl6); 124003485f2aSVlad Yasevich goto release_dst; 124103485f2aSVlad Yasevich } 124203485f2aSVlad Yasevich 1243db8dac20SDavid S. Miller lock_sock(sk); 1244db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1245db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1246db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1247db8dac20SDavid S. Miller release_sock(sk); 1248db8dac20SDavid S. Miller 1249ba7a46f1SJoe Perches net_dbg_ratelimited("udp cork app bug 2\n"); 1250db8dac20SDavid S. Miller err = -EINVAL; 1251db8dac20SDavid S. Miller goto out; 1252db8dac20SDavid S. Miller } 1253db8dac20SDavid S. Miller 1254db8dac20SDavid S. Miller up->pending = AF_INET6; 1255db8dac20SDavid S. Miller 1256db8dac20SDavid S. Miller do_append_data: 125726879da5SWei Wang if (ipc6.dontfrag < 0) 125826879da5SWei Wang ipc6.dontfrag = np->dontfrag; 1259db8dac20SDavid S. Miller up->len += ulen; 126026879da5SWei Wang err = ip6_append_data(sk, getfrag, msg, ulen, sizeof(struct udphdr), 126126879da5SWei Wang &ipc6, &fl6, (struct rt6_info *)dst, 126226879da5SWei Wang corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, &sockc); 1263db8dac20SDavid S. Miller if (err) 1264db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1265db8dac20SDavid S. Miller else if (!corkreq) 1266db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1267db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1268db8dac20SDavid S. Miller up->pending = 0; 1269db8dac20SDavid S. Miller 127003485f2aSVlad Yasevich if (err > 0) 127103485f2aSVlad Yasevich err = np->recverr ? net_xmit_errno(err) : 0; 127203485f2aSVlad Yasevich release_sock(sk); 127303485f2aSVlad Yasevich 127403485f2aSVlad Yasevich release_dst: 1275db8dac20SDavid S. Miller if (dst) { 1276db8dac20SDavid S. Miller if (connected) { 1277db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 1278efe4208fSEric Dumazet ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? 1279efe4208fSEric Dumazet &sk->sk_v6_daddr : NULL, 1280db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 12814c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1282db8dac20SDavid S. Miller &np->saddr : 1283db8dac20SDavid S. Miller #endif 1284db8dac20SDavid S. Miller NULL); 1285db8dac20SDavid S. Miller } else { 1286db8dac20SDavid S. Miller dst_release(dst); 1287db8dac20SDavid S. Miller } 1288a3c96089SYOSHIFUJI Hideaki dst = NULL; 1289db8dac20SDavid S. Miller } 1290db8dac20SDavid S. Miller 1291db8dac20SDavid S. Miller out: 1292a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1293db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 129445f6fad8SEric Dumazet txopt_put(opt_to_free); 1295db8dac20SDavid S. Miller if (!err) 1296db8dac20SDavid S. Miller return len; 1297db8dac20SDavid S. Miller /* 1298db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1299db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1300db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1301db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1302db8dac20SDavid S. Miller * seems like overkill. 1303db8dac20SDavid S. Miller */ 1304db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 13056aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 1306235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1307db8dac20SDavid S. Miller } 1308db8dac20SDavid S. Miller return err; 1309db8dac20SDavid S. Miller 1310db8dac20SDavid S. Miller do_confirm: 1311db8dac20SDavid S. Miller dst_confirm(dst); 1312db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1313db8dac20SDavid S. Miller goto back_from_confirm; 1314db8dac20SDavid S. Miller err = 0; 1315db8dac20SDavid S. Miller goto out; 1316db8dac20SDavid S. Miller } 1317db8dac20SDavid S. Miller 13187d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1319db8dac20SDavid S. Miller { 132044046a59STom Parkin struct udp_sock *up = udp_sk(sk); 1321db8dac20SDavid S. Miller lock_sock(sk); 1322db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1323db8dac20SDavid S. Miller release_sock(sk); 1324db8dac20SDavid S. Miller 132544046a59STom Parkin if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 132644046a59STom Parkin void (*encap_destroy)(struct sock *sk); 132744046a59STom Parkin encap_destroy = ACCESS_ONCE(up->encap_destroy); 132844046a59STom Parkin if (encap_destroy) 132944046a59STom Parkin encap_destroy(sk); 133044046a59STom Parkin } 133144046a59STom Parkin 1332db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1333db8dac20SDavid S. Miller } 1334db8dac20SDavid S. Miller 1335db8dac20SDavid S. Miller /* 1336db8dac20SDavid S. Miller * Socket option code for UDP 1337db8dac20SDavid S. Miller */ 1338db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1339b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1340db8dac20SDavid S. Miller { 1341db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1342db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1343db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1344db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1345db8dac20SDavid S. Miller } 1346db8dac20SDavid S. Miller 1347db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1348db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1349b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1350db8dac20SDavid S. Miller { 1351db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1352db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1353db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1354db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1355db8dac20SDavid S. Miller } 1356db8dac20SDavid S. Miller #endif 1357db8dac20SDavid S. Miller 1358db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1359db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1360db8dac20SDavid S. Miller { 1361db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1362db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1363db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1364db8dac20SDavid S. Miller } 1365db8dac20SDavid S. Miller 1366db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1367db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1368db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1369db8dac20SDavid S. Miller { 1370db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1371db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1372db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1373db8dac20SDavid S. Miller } 1374db8dac20SDavid S. Miller #endif 1375db8dac20SDavid S. Miller 137641135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1377db8dac20SDavid S. Miller .handler = udpv6_rcv, 1378db8dac20SDavid S. Miller .err_handler = udpv6_err, 1379db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1380db8dac20SDavid S. Miller }; 1381db8dac20SDavid S. Miller 1382db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1383db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1384db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1385db8dac20SDavid S. Miller { 138617ef66afSLorenzo Colitti if (v == SEQ_START_TOKEN) { 138717ef66afSLorenzo Colitti seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); 138817ef66afSLorenzo Colitti } else { 138917ef66afSLorenzo Colitti int bucket = ((struct udp_iter_state *)seq->private)->bucket; 139017ef66afSLorenzo Colitti struct inet_sock *inet = inet_sk(v); 139117ef66afSLorenzo Colitti __u16 srcp = ntohs(inet->inet_sport); 139217ef66afSLorenzo Colitti __u16 destp = ntohs(inet->inet_dport); 139317ef66afSLorenzo Colitti ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); 139417ef66afSLorenzo Colitti } 1395db8dac20SDavid S. Miller return 0; 1396db8dac20SDavid S. Miller } 1397db8dac20SDavid S. Miller 139873cb88ecSArjan van de Ven static const struct file_operations udp6_afinfo_seq_fops = { 139973cb88ecSArjan van de Ven .owner = THIS_MODULE, 140073cb88ecSArjan van de Ven .open = udp_seq_open, 140173cb88ecSArjan van de Ven .read = seq_read, 140273cb88ecSArjan van de Ven .llseek = seq_lseek, 140373cb88ecSArjan van de Ven .release = seq_release_net 140473cb88ecSArjan van de Ven }; 140573cb88ecSArjan van de Ven 1406db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1407db8dac20SDavid S. Miller .name = "udp6", 1408db8dac20SDavid S. Miller .family = AF_INET6, 1409645ca708SEric Dumazet .udp_table = &udp_table, 141073cb88ecSArjan van de Ven .seq_fops = &udp6_afinfo_seq_fops, 1411dda61925SDenis V. Lunev .seq_ops = { 1412dda61925SDenis V. Lunev .show = udp6_seq_show, 1413dda61925SDenis V. Lunev }, 1414db8dac20SDavid S. Miller }; 1415db8dac20SDavid S. Miller 14162c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1417db8dac20SDavid S. Miller { 14180c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1419db8dac20SDavid S. Miller } 1420db8dac20SDavid S. Miller 1421ec120da6SIan Morris void udp6_proc_exit(struct net *net) 1422ec120da6SIan Morris { 14230c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1424db8dac20SDavid S. Miller } 1425db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1426db8dac20SDavid S. Miller 1427f77d6021SEric Dumazet void udp_v6_clear_sk(struct sock *sk, int size) 1428f77d6021SEric Dumazet { 1429f77d6021SEric Dumazet struct inet_sock *inet = inet_sk(sk); 1430f77d6021SEric Dumazet 1431f77d6021SEric Dumazet /* we do not want to clear pinet6 field, because of RCU lookups */ 1432f77d6021SEric Dumazet sk_prot_clear_portaddr_nulls(sk, offsetof(struct inet_sock, pinet6)); 1433f77d6021SEric Dumazet 1434f77d6021SEric Dumazet size -= offsetof(struct inet_sock, pinet6) + sizeof(inet->pinet6); 1435f77d6021SEric Dumazet memset(&inet->pinet6 + 1, 0, size); 1436f77d6021SEric Dumazet } 1437f77d6021SEric Dumazet 1438db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1439db8dac20SDavid S. Miller 1440db8dac20SDavid S. Miller struct proto udpv6_prot = { 1441db8dac20SDavid S. Miller .name = "UDPv6", 1442db8dac20SDavid S. Miller .owner = THIS_MODULE, 1443db8dac20SDavid S. Miller .close = udp_lib_close, 1444db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1445db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1446db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1447db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1448db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1449db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1450db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1451db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1452f7ad74feSBenjamin LaHaise .backlog_rcv = __udpv6_queue_rcv_skb, 1453e646b657SMartin KaFai Lau .release_cb = ip6_datagram_release_cb, 1454db8dac20SDavid S. Miller .hash = udp_lib_hash, 1455db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1456719f8358SEric Dumazet .rehash = udp_v6_rehash, 1457db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1458db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1459db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1460db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1461db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1462db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1463271b72c7SEric Dumazet .slab_flags = SLAB_DESTROY_BY_RCU, 1464645ca708SEric Dumazet .h.udp_table = &udp_table, 1465db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1466db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1467db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1468db8dac20SDavid S. Miller #endif 1469f77d6021SEric Dumazet .clear_sk = udp_v6_clear_sk, 14705d77dca8SDavid Ahern .diag_destroy = udp_abort, 1471db8dac20SDavid S. Miller }; 1472db8dac20SDavid S. Miller 1473db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1474db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1475db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1476db8dac20SDavid S. Miller .prot = &udpv6_prot, 1477db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1478db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1479db8dac20SDavid S. Miller }; 1480db8dac20SDavid S. Miller 1481db8dac20SDavid S. Miller int __init udpv6_init(void) 1482db8dac20SDavid S. Miller { 1483db8dac20SDavid S. Miller int ret; 1484db8dac20SDavid S. Miller 14853336288aSVlad Yasevich ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 14863336288aSVlad Yasevich if (ret) 1487c6b641a4SVlad Yasevich goto out; 14883336288aSVlad Yasevich 1489db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1490db8dac20SDavid S. Miller if (ret) 1491db8dac20SDavid S. Miller goto out_udpv6_protocol; 1492db8dac20SDavid S. Miller out: 1493db8dac20SDavid S. Miller return ret; 1494db8dac20SDavid S. Miller 1495db8dac20SDavid S. Miller out_udpv6_protocol: 1496db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1497db8dac20SDavid S. Miller goto out; 1498db8dac20SDavid S. Miller } 1499db8dac20SDavid S. Miller 1500db8dac20SDavid S. Miller void udpv6_exit(void) 1501db8dac20SDavid S. Miller { 1502db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1503db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1504db8dac20SDavid S. Miller } 1505