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; 337db8dac20SDavid S. Miller 338db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 33985fbaa75SHannes Frederic Sowa return ipv6_recv_error(sk, msg, len, addr_len); 340db8dac20SDavid S. Miller 3414b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 34285fbaa75SHannes Frederic Sowa return ipv6_recv_rxpmtu(sk, msg, len, addr_len); 3434b340ae2SBrian Haley 344db8dac20SDavid S. Miller try_again: 345627d2d6bSsamanthakumar peeking = off = sk_peek_offset(sk, flags); 346db8dac20SDavid S. Miller skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), 3473f518bf7SPavel Emelyanov &peeked, &off, &err); 348db8dac20SDavid S. Miller if (!skb) 349627d2d6bSsamanthakumar return err; 350db8dac20SDavid S. Miller 351e6afc8acSsamanthakumar ulen = skb->len; 35259c2cdaeSDavid S. Miller copied = len; 353627d2d6bSsamanthakumar if (copied > ulen - off) 354627d2d6bSsamanthakumar copied = ulen - off; 35559c2cdaeSDavid S. Miller else if (copied < ulen) 356db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 357db8dac20SDavid S. Miller 358f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 359f26ba175SWei Yongjun 360db8dac20SDavid S. Miller /* 361db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 362db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 363db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 364db8dac20SDavid S. Miller */ 365db8dac20SDavid S. Miller 366627d2d6bSsamanthakumar if (copied < ulen || UDP_SKB_CB(skb)->partial_cov || peeking) { 367197c949eSEric Dumazet checksum_valid = !udp_lib_checksum_complete(skb); 368197c949eSEric Dumazet if (!checksum_valid) 369db8dac20SDavid S. Miller goto csum_copy_err; 370db8dac20SDavid S. Miller } 371db8dac20SDavid S. Miller 372197c949eSEric Dumazet if (checksum_valid || skb_csum_unnecessary(skb)) 373627d2d6bSsamanthakumar err = skb_copy_datagram_msg(skb, off, msg, copied); 374db8dac20SDavid S. Miller else { 375627d2d6bSsamanthakumar err = skb_copy_and_csum_datagram_msg(skb, off, msg); 376db8dac20SDavid S. Miller if (err == -EINVAL) 377db8dac20SDavid S. Miller goto csum_copy_err; 378db8dac20SDavid S. Miller } 37922911fc5SEric Dumazet if (unlikely(err)) { 380979402b1SEric Dumazet if (!peeked) { 381979402b1SEric Dumazet atomic_inc(&sk->sk_drops); 382979402b1SEric Dumazet if (is_udp4) 3836aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, 384979402b1SEric Dumazet is_udplite); 385979402b1SEric Dumazet else 3866aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, 387979402b1SEric Dumazet is_udplite); 388979402b1SEric Dumazet } 389850cbaddSPaolo Abeni kfree_skb(skb); 390627d2d6bSsamanthakumar return err; 39122911fc5SEric Dumazet } 392f26ba175SWei Yongjun if (!peeked) { 393f26ba175SWei Yongjun if (is_udp4) 3946aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, 3956aef70a8SEric Dumazet is_udplite); 396f26ba175SWei Yongjun else 3976aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, 3986aef70a8SEric Dumazet is_udplite); 399f26ba175SWei Yongjun } 400db8dac20SDavid S. Miller 4013b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 402db8dac20SDavid S. Miller 403db8dac20SDavid S. Miller /* Copy the address. */ 404db8dac20SDavid S. Miller if (msg->msg_name) { 405342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 406db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 407db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 408db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 409db8dac20SDavid S. Miller 410842df073SHannes Frederic Sowa if (is_udp4) { 411b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 412b301e82cSBrian Haley &sin6->sin6_addr); 413842df073SHannes Frederic Sowa sin6->sin6_scope_id = 0; 414842df073SHannes Frederic Sowa } else { 4154e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr; 416842df073SHannes Frederic Sowa sin6->sin6_scope_id = 417842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin6->sin6_addr, 4184330487aSDuan Jiong inet6_iif(skb)); 419db8dac20SDavid S. Miller } 420bceaa902SHannes Frederic Sowa *addr_len = sizeof(*sin6); 421db8dac20SDavid S. Miller } 4224b261c75SHannes Frederic Sowa 4234b261c75SHannes Frederic Sowa if (np->rxopt.all) 4244b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 4254b261c75SHannes Frederic Sowa 426f26ba175SWei Yongjun if (is_udp4) { 427db8dac20SDavid S. Miller if (inet->cmsg_flags) 428ad959036SPaolo Abeni ip_cmsg_recv_offset(msg, sk, skb, 42910df8e61SEric Dumazet sizeof(struct udphdr), off); 430db8dac20SDavid S. Miller } else { 431db8dac20SDavid S. Miller if (np->rxopt.all) 4324b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 433db8dac20SDavid S. Miller } 434db8dac20SDavid S. Miller 43559c2cdaeSDavid S. Miller err = copied; 436db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 437db8dac20SDavid S. Miller err = ulen; 438db8dac20SDavid S. Miller 439850cbaddSPaolo Abeni skb_consume_udp(sk, skb, peeking ? -err : err); 440db8dac20SDavid S. Miller return err; 441db8dac20SDavid S. Miller 442db8dac20SDavid S. Miller csum_copy_err: 443850cbaddSPaolo Abeni if (!__sk_queue_drop_skb(sk, skb, flags)) { 4446a5dc9e5SEric Dumazet if (is_udp4) { 4456aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), 4466a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 4476aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), 4480856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4496a5dc9e5SEric Dumazet } else { 4506aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 4516a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 4526aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 4530856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4540856f939SWei Yongjun } 4556a5dc9e5SEric Dumazet } 456850cbaddSPaolo Abeni kfree_skb(skb); 457db8dac20SDavid S. Miller 458beb39db5SEric Dumazet /* starting over for a new packet, but check if we need to yield */ 459beb39db5SEric Dumazet cond_resched(); 4609cfaa8deSXufeng Zhang msg->msg_flags &= ~MSG_TRUNC; 461db8dac20SDavid S. Miller goto try_again; 462db8dac20SDavid S. Miller } 463db8dac20SDavid S. Miller 464db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 465d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 466645ca708SEric Dumazet struct udp_table *udptable) 467db8dac20SDavid S. Miller { 468db8dac20SDavid S. Miller struct ipv6_pinfo *np; 469b71d1d42SEric Dumazet const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; 470b71d1d42SEric Dumazet const struct in6_addr *saddr = &hdr->saddr; 471b71d1d42SEric Dumazet const struct in6_addr *daddr = &hdr->daddr; 472db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr *)(skb->data+offset); 473db8dac20SDavid S. Miller struct sock *sk; 474e0d8c1b7SWei Wang int harderr; 475db8dac20SDavid S. Miller int err; 4767304fe46SDuan Jiong struct net *net = dev_net(skb->dev); 477db8dac20SDavid S. Miller 478e32ea7e7SCraig Gallek sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source, 479538950a1SCraig Gallek inet6_iif(skb), udptable, skb); 48063159f29SIan Morris if (!sk) { 481a16292a0SEric Dumazet __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev), 4827304fe46SDuan Jiong ICMP6_MIB_INERRORS); 483db8dac20SDavid S. Miller return; 4847304fe46SDuan Jiong } 485db8dac20SDavid S. Miller 486e0d8c1b7SWei Wang harderr = icmpv6_err_convert(type, code, &err); 487e0d8c1b7SWei Wang np = inet6_sk(sk); 488e0d8c1b7SWei Wang 48993b36cf3SHannes Frederic Sowa if (type == ICMPV6_PKT_TOOBIG) { 49093b36cf3SHannes Frederic Sowa if (!ip6_sk_accept_pmtu(sk)) 49193b36cf3SHannes Frederic Sowa goto out; 49281aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info); 493e0d8c1b7SWei Wang if (np->pmtudisc != IPV6_PMTUDISC_DONT) 494e0d8c1b7SWei Wang harderr = 1; 49593b36cf3SHannes Frederic Sowa } 4961a462d18SDuan Jiong if (type == NDISC_REDIRECT) { 497ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk); 4981a462d18SDuan Jiong goto out; 4991a462d18SDuan Jiong } 50081aded24SDavid S. Miller 501e0d8c1b7SWei Wang if (!np->recverr) { 502e0d8c1b7SWei Wang if (!harderr || sk->sk_state != TCP_ESTABLISHED) 503db8dac20SDavid S. Miller goto out; 504e0d8c1b7SWei Wang } else { 505db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 506e0d8c1b7SWei Wang } 507b1faf566SEric Dumazet 508db8dac20SDavid S. Miller sk->sk_err = err; 509db8dac20SDavid S. Miller sk->sk_error_report(sk); 510db8dac20SDavid S. Miller out: 511ca065d0cSEric Dumazet return; 512db8dac20SDavid S. Miller } 513db8dac20SDavid S. Miller 514f7ad74feSBenjamin LaHaise static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 515f7ad74feSBenjamin LaHaise { 516f7ad74feSBenjamin LaHaise int rc; 517f7ad74feSBenjamin LaHaise 518efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 519f7ad74feSBenjamin LaHaise sock_rps_save_rxhash(sk, skb); 520005ec974SShawn Bohrer sk_mark_napi_id(sk, skb); 5212c8c56e1SEric Dumazet sk_incoming_cpu_update(sk); 522005ec974SShawn Bohrer } 523f7ad74feSBenjamin LaHaise 524850cbaddSPaolo Abeni rc = __udp_enqueue_schedule_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) 530e61da9e2SEric Dumazet UDP6_INC_STATS(sock_net(sk), 531f7ad74feSBenjamin LaHaise UDP_MIB_RCVBUFERRORS, is_udplite); 532e61da9e2SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 533f7ad74feSBenjamin LaHaise kfree_skb(skb); 534f7ad74feSBenjamin LaHaise return -1; 535f7ad74feSBenjamin LaHaise } 536850cbaddSPaolo Abeni 537f7ad74feSBenjamin LaHaise return 0; 538f7ad74feSBenjamin LaHaise } 539f7ad74feSBenjamin LaHaise 540db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 541d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 542d5fdd6baSBrian Haley u8 code, int offset, __be32 info) 543db8dac20SDavid S. Miller { 544645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 545db8dac20SDavid S. Miller } 546db8dac20SDavid S. Miller 547d7f3f621SBenjamin LaHaise static struct static_key udpv6_encap_needed __read_mostly; 548d7f3f621SBenjamin LaHaise void udpv6_encap_enable(void) 549d7f3f621SBenjamin LaHaise { 550d7f3f621SBenjamin LaHaise if (!static_key_enabled(&udpv6_encap_needed)) 551d7f3f621SBenjamin LaHaise static_key_slow_inc(&udpv6_encap_needed); 552d7f3f621SBenjamin LaHaise } 553d7f3f621SBenjamin LaHaise EXPORT_SYMBOL(udpv6_encap_enable); 554d7f3f621SBenjamin LaHaise 555db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 556db8dac20SDavid S. Miller { 557db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 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); 579e5aed006SHannes Frederic Sowa if (encap_rcv) { 580d7f3f621SBenjamin LaHaise int ret; 581d7f3f621SBenjamin LaHaise 5820a80966bSTom Herbert /* Verify checksum before giving to encap */ 5830a80966bSTom Herbert if (udp_lib_checksum_complete(skb)) 5840a80966bSTom Herbert goto csum_error; 5850a80966bSTom Herbert 586d7f3f621SBenjamin LaHaise ret = encap_rcv(sk, skb); 587d7f3f621SBenjamin LaHaise if (ret <= 0) { 58802c22347SEric Dumazet __UDP_INC_STATS(sock_net(sk), 589d7f3f621SBenjamin LaHaise UDP_MIB_INDATAGRAMS, 590d7f3f621SBenjamin LaHaise is_udplite); 591d7f3f621SBenjamin LaHaise return -ret; 592d7f3f621SBenjamin LaHaise } 593d7f3f621SBenjamin LaHaise } 594d7f3f621SBenjamin LaHaise 595d7f3f621SBenjamin LaHaise /* FALLTHROUGH -- it's a UDP Packet */ 596d7f3f621SBenjamin LaHaise } 597d7f3f621SBenjamin LaHaise 598db8dac20SDavid S. Miller /* 599db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 600db8dac20SDavid S. Miller */ 601db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 602db8dac20SDavid S. Miller 603db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 604ba7a46f1SJoe Perches net_dbg_ratelimited("UDPLITE6: partial coverage %d while full coverage %d requested\n", 605db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 606db8dac20SDavid S. Miller goto drop; 607db8dac20SDavid S. Miller } 608db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 609ba7a46f1SJoe Perches net_dbg_ratelimited("UDPLITE6: coverage %d too small, need min %d\n", 610db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 611db8dac20SDavid S. Miller goto drop; 612db8dac20SDavid S. Miller } 613db8dac20SDavid S. Miller } 614db8dac20SDavid S. Miller 615ce25d66aSEric Dumazet if (rcu_access_pointer(sk->sk_filter) && 616ce25d66aSEric Dumazet udp_lib_checksum_complete(skb)) 6176a5dc9e5SEric Dumazet goto csum_error; 618ce25d66aSEric Dumazet 619ba66bbe5SDaniel Borkmann if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr))) 620a6127697SMichal Kubeček goto drop; 621db8dac20SDavid S. Miller 622e6afc8acSsamanthakumar udp_csum_pull_header(skb); 623cb80ef46SBenjamin LaHaise 624d826eb14SEric Dumazet skb_dst_drop(skb); 625db8dac20SDavid S. Miller 626850cbaddSPaolo Abeni return __udpv6_queue_rcv_skb(sk, skb); 6273e215c8dSJames M Leddy 6286a5dc9e5SEric Dumazet csum_error: 62902c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); 630db8dac20SDavid S. Miller drop: 63102c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 632cb80ef46SBenjamin LaHaise atomic_inc(&sk->sk_drops); 633db8dac20SDavid S. Miller kfree_skb(skb); 634db8dac20SDavid S. Miller return -1; 635db8dac20SDavid S. Miller } 636db8dac20SDavid S. Miller 6375cf3d461SDavid Held static bool __udp_v6_is_mcast_sock(struct net *net, struct sock *sk, 638b71d1d42SEric Dumazet __be16 loc_port, const struct in6_addr *loc_addr, 639b71d1d42SEric Dumazet __be16 rmt_port, const struct in6_addr *rmt_addr, 6405cf3d461SDavid Held int dif, unsigned short hnum) 641db8dac20SDavid S. Miller { 6429e89fd8bSSven Wegener struct inet_sock *inet = inet_sk(sk); 643db8dac20SDavid S. Miller 6449e89fd8bSSven Wegener if (!net_eq(sock_net(sk), net)) 6455cf3d461SDavid Held return false; 646b8ad0cbcSDaniel Lezcano 6475cf3d461SDavid Held if (udp_sk(sk)->udp_port_hash != hnum || 6485cf3d461SDavid Held sk->sk_family != PF_INET6 || 6495cf3d461SDavid Held (inet->inet_dport && inet->inet_dport != rmt_port) || 6505cf3d461SDavid Held (!ipv6_addr_any(&sk->sk_v6_daddr) && 6515cf3d461SDavid Held !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) || 65233b4b015SHenning Rogge (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) || 65333b4b015SHenning Rogge (!ipv6_addr_any(&sk->sk_v6_rcv_saddr) && 65433b4b015SHenning Rogge !ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))) 6555cf3d461SDavid Held return false; 6569e89fd8bSSven Wegener if (!inet6_mc_check(sk, loc_addr, rmt_addr)) 6575cf3d461SDavid Held return false; 6585cf3d461SDavid Held return true; 659db8dac20SDavid S. Miller } 660db8dac20SDavid S. Miller 6614068579eSTom Herbert static void udp6_csum_zero_error(struct sk_buff *skb) 6624068579eSTom Herbert { 6634068579eSTom Herbert /* RFC 2460 section 8.1 says that we SHOULD log 6644068579eSTom Herbert * this error. Well, it is reasonable. 6654068579eSTom Herbert */ 666ba7a46f1SJoe Perches net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n", 6674068579eSTom Herbert &ipv6_hdr(skb)->saddr, ntohs(udp_hdr(skb)->source), 6684068579eSTom Herbert &ipv6_hdr(skb)->daddr, ntohs(udp_hdr(skb)->dest)); 6694068579eSTom Herbert } 6704068579eSTom Herbert 671db8dac20SDavid S. Miller /* 672db8dac20SDavid S. Miller * Note: called only from the BH handler context, 673db8dac20SDavid S. Miller * so we don't need to lock the hashes. 674db8dac20SDavid S. Miller */ 675e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 676b71d1d42SEric Dumazet const struct in6_addr *saddr, const struct in6_addr *daddr, 67736cbb245SRick Jones struct udp_table *udptable, int proto) 678db8dac20SDavid S. Miller { 679ca065d0cSEric Dumazet struct sock *sk, *first = NULL; 680db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 6815cf3d461SDavid Held unsigned short hnum = ntohs(uh->dest); 6825cf3d461SDavid Held struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum); 683ca065d0cSEric Dumazet unsigned int offset = offsetof(typeof(*sk), sk_node); 6842dc41cffSDavid Held unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10); 685ca065d0cSEric Dumazet int dif = inet6_iif(skb); 686ca065d0cSEric Dumazet struct hlist_node *node; 687ca065d0cSEric Dumazet struct sk_buff *nskb; 6882dc41cffSDavid Held 6892dc41cffSDavid Held if (use_hash2) { 6902dc41cffSDavid Held hash2_any = udp6_portaddr_hash(net, &in6addr_any, hnum) & 6912dc41cffSDavid Held udp_table.mask; 6922dc41cffSDavid Held hash2 = udp6_portaddr_hash(net, daddr, hnum) & udp_table.mask; 6932dc41cffSDavid Held start_lookup: 6942dc41cffSDavid Held hslot = &udp_table.hash2[hash2]; 6952dc41cffSDavid Held offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node); 6962dc41cffSDavid Held } 697db8dac20SDavid S. Miller 698ca065d0cSEric Dumazet sk_for_each_entry_offset_rcu(sk, node, &hslot->head, offset) { 699ca065d0cSEric Dumazet if (!__udp_v6_is_mcast_sock(net, sk, uh->dest, daddr, 700ca065d0cSEric Dumazet uh->source, saddr, dif, hnum)) 701ca065d0cSEric Dumazet continue; 7021c19448cSTom Herbert /* If zero checksum and no_check is not on for 7034068579eSTom Herbert * the socket then skip it. 7044068579eSTom Herbert */ 705ca065d0cSEric Dumazet if (!uh->check && !udp_sk(sk)->no_check6_rx) 706ca065d0cSEric Dumazet continue; 707ca065d0cSEric Dumazet if (!first) { 708ca065d0cSEric Dumazet first = sk; 709ca065d0cSEric Dumazet continue; 710db8dac20SDavid S. Miller } 711ca065d0cSEric Dumazet nskb = skb_clone(skb, GFP_ATOMIC); 712ca065d0cSEric Dumazet if (unlikely(!nskb)) { 713ca065d0cSEric Dumazet atomic_inc(&sk->sk_drops); 71402c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_RCVBUFERRORS, 715ca065d0cSEric Dumazet IS_UDPLITE(sk)); 71602c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_INERRORS, 717ca065d0cSEric Dumazet IS_UDPLITE(sk)); 718ca065d0cSEric Dumazet continue; 719a1ab77f9SEric Dumazet } 720db8dac20SDavid S. Miller 721ca065d0cSEric Dumazet if (udpv6_queue_rcv_skb(sk, nskb) > 0) 722ca065d0cSEric Dumazet consume_skb(nskb); 723ca065d0cSEric Dumazet } 724a1ab77f9SEric Dumazet 7252dc41cffSDavid Held /* Also lookup *:port if we are using hash2 and haven't done so yet. */ 7262dc41cffSDavid Held if (use_hash2 && hash2 != hash2_any) { 7272dc41cffSDavid Held hash2 = hash2_any; 7282dc41cffSDavid Held goto start_lookup; 7292dc41cffSDavid Held } 7302dc41cffSDavid Held 731ca065d0cSEric Dumazet if (first) { 732ca065d0cSEric Dumazet if (udpv6_queue_rcv_skb(first, skb) > 0) 733ca065d0cSEric Dumazet consume_skb(skb); 734a1ab77f9SEric Dumazet } else { 735ca065d0cSEric Dumazet kfree_skb(skb); 73602c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_IGNOREDMULTI, 73736cbb245SRick Jones proto == IPPROTO_UDPLITE); 738a1ab77f9SEric Dumazet } 739db8dac20SDavid S. Miller return 0; 740db8dac20SDavid S. Miller } 741db8dac20SDavid S. Miller 742645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 743db8dac20SDavid S. Miller int proto) 744db8dac20SDavid S. Miller { 745b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 746ca065d0cSEric Dumazet struct net *net = dev_net(skb->dev); 747ca065d0cSEric Dumazet struct udphdr *uh; 748ca065d0cSEric Dumazet struct sock *sk; 749db8dac20SDavid S. Miller u32 ulen = 0; 750db8dac20SDavid S. Miller 751db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 752d6bc0149SBjørn Mork goto discard; 753db8dac20SDavid S. Miller 754db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 755db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 756db8dac20SDavid S. Miller uh = udp_hdr(skb); 757db8dac20SDavid S. Miller 758db8dac20SDavid S. Miller ulen = ntohs(uh->len); 759db8dac20SDavid S. Miller if (ulen > skb->len) 760db8dac20SDavid S. Miller goto short_packet; 761db8dac20SDavid S. Miller 762db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 763db8dac20SDavid S. Miller /* UDP validates ulen. */ 764db8dac20SDavid S. Miller 765db8dac20SDavid S. Miller /* Check for jumbo payload */ 766db8dac20SDavid S. Miller if (ulen == 0) 767db8dac20SDavid S. Miller ulen = skb->len; 768db8dac20SDavid S. Miller 769db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 770db8dac20SDavid S. Miller goto short_packet; 771db8dac20SDavid S. Miller 772db8dac20SDavid S. Miller if (ulen < skb->len) { 773db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 774db8dac20SDavid S. Miller goto short_packet; 775db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 776db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 777db8dac20SDavid S. Miller uh = udp_hdr(skb); 778db8dac20SDavid S. Miller } 779db8dac20SDavid S. Miller } 780db8dac20SDavid S. Miller 781db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 7826a5dc9e5SEric Dumazet goto csum_error; 783db8dac20SDavid S. Miller 784db8dac20SDavid S. Miller /* 785db8dac20SDavid S. Miller * Multicast receive code 786db8dac20SDavid S. Miller */ 787db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 788e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 78936cbb245SRick Jones saddr, daddr, udptable, proto); 790db8dac20SDavid S. Miller 791db8dac20SDavid S. Miller /* Unicast */ 792db8dac20SDavid S. Miller 793db8dac20SDavid S. Miller /* 794db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 795db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 796db8dac20SDavid S. Miller */ 797607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 79853b24b8fSIan Morris if (sk) { 799a5b50476SEliezer Tamir int ret; 800a5b50476SEliezer Tamir 8011c19448cSTom Herbert if (!uh->check && !udp_sk(sk)->no_check6_rx) { 8024068579eSTom Herbert udp6_csum_zero_error(skb); 8034068579eSTom Herbert goto csum_error; 8044068579eSTom Herbert } 8054068579eSTom Herbert 806224d019cSTom Herbert if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk)) 8072abb7cdcSTom Herbert skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check, 8082abb7cdcSTom Herbert ip6_compute_pseudo); 8092abb7cdcSTom Herbert 810a5b50476SEliezer Tamir ret = udpv6_queue_rcv_skb(sk, skb); 811db8dac20SDavid S. Miller 81259dca1d8SBill Sommerfeld /* a return value > 0 means to resubmit the input */ 813cb80ef46SBenjamin LaHaise if (ret > 0) 81459dca1d8SBill Sommerfeld return ret; 815cb80ef46SBenjamin LaHaise 816cb80ef46SBenjamin LaHaise return 0; 817cb80ef46SBenjamin LaHaise } 818cb80ef46SBenjamin LaHaise 8194068579eSTom Herbert if (!uh->check) { 8204068579eSTom Herbert udp6_csum_zero_error(skb); 8214068579eSTom Herbert goto csum_error; 8224068579eSTom Herbert } 8234068579eSTom Herbert 824db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 825db8dac20SDavid S. Miller goto discard; 826db8dac20SDavid S. Miller 827db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 8286a5dc9e5SEric Dumazet goto csum_error; 829db8dac20SDavid S. Miller 83002c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); 8313ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 832db8dac20SDavid S. Miller 833db8dac20SDavid S. Miller kfree_skb(skb); 834db8dac20SDavid S. Miller return 0; 835db8dac20SDavid S. Miller 836db8dac20SDavid S. Miller short_packet: 837ba7a46f1SJoe Perches net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 838db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 839ba7a46f1SJoe Perches saddr, ntohs(uh->source), 840ba7a46f1SJoe Perches ulen, skb->len, 841ba7a46f1SJoe Perches daddr, ntohs(uh->dest)); 8426a5dc9e5SEric Dumazet goto discard; 8436a5dc9e5SEric Dumazet csum_error: 84402c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); 845db8dac20SDavid S. Miller discard: 84602c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 847db8dac20SDavid S. Miller kfree_skb(skb); 848db8dac20SDavid S. Miller return 0; 849db8dac20SDavid S. Miller } 850db8dac20SDavid S. Miller 851db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 852db8dac20SDavid S. Miller { 853645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 854db8dac20SDavid S. Miller } 855db8dac20SDavid S. Miller 856db8dac20SDavid S. Miller /* 857db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 858db8dac20SDavid S. Miller */ 859db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 860db8dac20SDavid S. Miller { 861db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 862db8dac20SDavid S. Miller 86336d926b9SDenis V. Lunev if (up->pending == AF_INET) 86436d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 86536d926b9SDenis V. Lunev else if (up->pending) { 866db8dac20SDavid S. Miller up->len = 0; 867db8dac20SDavid S. Miller up->pending = 0; 868db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 869db8dac20SDavid S. Miller } 870db8dac20SDavid S. Miller } 871db8dac20SDavid S. Miller 872493c6be3SSridhar Samudrala /** 873493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 874493c6be3SSridhar Samudrala * @sk: socket we are sending on 875493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 876493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 877493c6be3SSridhar Samudrala */ 878493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 879493c6be3SSridhar Samudrala const struct in6_addr *saddr, 880493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 881493c6be3SSridhar Samudrala { 882493c6be3SSridhar Samudrala unsigned int offset; 883493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 884d39d938cSVlad Yasevich struct sk_buff *frags = skb_shinfo(skb)->frag_list; 885493c6be3SSridhar Samudrala __wsum csum = 0; 886493c6be3SSridhar Samudrala 887d39d938cSVlad Yasevich if (!frags) { 888493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 889493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 890493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 891493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 892493c6be3SSridhar Samudrala } else { 893493c6be3SSridhar Samudrala /* 894493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 895493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 896493c6be3SSridhar Samudrala * should be together 897493c6be3SSridhar Samudrala */ 898493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 899493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 900493c6be3SSridhar Samudrala 901493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 902493c6be3SSridhar Samudrala 903d39d938cSVlad Yasevich do { 904d39d938cSVlad Yasevich csum = csum_add(csum, frags->csum); 905d39d938cSVlad Yasevich } while ((frags = frags->next)); 906493c6be3SSridhar Samudrala 907493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 908493c6be3SSridhar Samudrala csum); 909493c6be3SSridhar Samudrala if (uh->check == 0) 910493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 911493c6be3SSridhar Samudrala } 912493c6be3SSridhar Samudrala } 913493c6be3SSridhar Samudrala 914db8dac20SDavid S. Miller /* 915db8dac20SDavid S. Miller * Sending 916db8dac20SDavid S. Miller */ 917db8dac20SDavid S. Miller 918d39d938cSVlad Yasevich static int udp_v6_send_skb(struct sk_buff *skb, struct flowi6 *fl6) 919db8dac20SDavid S. Miller { 920d39d938cSVlad Yasevich struct sock *sk = skb->sk; 921db8dac20SDavid S. Miller struct udphdr *uh; 922db8dac20SDavid S. Miller int err = 0; 923db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 924db8dac20SDavid S. Miller __wsum csum = 0; 925d39d938cSVlad Yasevich int offset = skb_transport_offset(skb); 926d39d938cSVlad Yasevich int len = skb->len - offset; 927db8dac20SDavid S. Miller 928db8dac20SDavid S. Miller /* 929db8dac20SDavid S. Miller * Create a UDP header 930db8dac20SDavid S. Miller */ 931db8dac20SDavid S. Miller uh = udp_hdr(skb); 9321958b856SDavid S. Miller uh->source = fl6->fl6_sport; 9331958b856SDavid S. Miller uh->dest = fl6->fl6_dport; 934d39d938cSVlad Yasevich uh->len = htons(len); 935db8dac20SDavid S. Miller uh->check = 0; 936db8dac20SDavid S. Miller 937db8dac20SDavid S. Miller if (is_udplite) 938d39d938cSVlad Yasevich csum = udplite_csum(skb); 939d39d938cSVlad Yasevich else if (udp_sk(sk)->no_check6_tx) { /* UDP csum disabled */ 9404068579eSTom Herbert skb->ip_summed = CHECKSUM_NONE; 9414068579eSTom Herbert goto send; 9424068579eSTom Herbert } else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 943d39d938cSVlad Yasevich udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, len); 944493c6be3SSridhar Samudrala goto send; 945493c6be3SSridhar Samudrala } else 946d39d938cSVlad Yasevich csum = udp_csum(skb); 947db8dac20SDavid S. Miller 948db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 9494c9483b2SDavid S. Miller uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 950d39d938cSVlad Yasevich len, fl6->flowi6_proto, csum); 951db8dac20SDavid S. Miller if (uh->check == 0) 952db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 953db8dac20SDavid S. Miller 954493c6be3SSridhar Samudrala send: 955d39d938cSVlad Yasevich err = ip6_send_skb(skb); 9566ce9e7b5SEric Dumazet if (err) { 9576ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 9586aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 9596ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 9606ce9e7b5SEric Dumazet err = 0; 9616ce9e7b5SEric Dumazet } 9626aef70a8SEric Dumazet } else { 9636aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 9646ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 9656aef70a8SEric Dumazet } 966d39d938cSVlad Yasevich return err; 967d39d938cSVlad Yasevich } 968d39d938cSVlad Yasevich 969d39d938cSVlad Yasevich static int udp_v6_push_pending_frames(struct sock *sk) 970d39d938cSVlad Yasevich { 971d39d938cSVlad Yasevich struct sk_buff *skb; 972d39d938cSVlad Yasevich struct udp_sock *up = udp_sk(sk); 973d39d938cSVlad Yasevich struct flowi6 fl6; 974d39d938cSVlad Yasevich int err = 0; 975d39d938cSVlad Yasevich 976d39d938cSVlad Yasevich if (up->pending == AF_INET) 977d39d938cSVlad Yasevich return udp_push_pending_frames(sk); 978d39d938cSVlad Yasevich 979d39d938cSVlad Yasevich /* ip6_finish_skb will release the cork, so make a copy of 980d39d938cSVlad Yasevich * fl6 here. 981d39d938cSVlad Yasevich */ 982d39d938cSVlad Yasevich fl6 = inet_sk(sk)->cork.fl.u.ip6; 983d39d938cSVlad Yasevich 984d39d938cSVlad Yasevich skb = ip6_finish_skb(sk); 985d39d938cSVlad Yasevich if (!skb) 986d39d938cSVlad Yasevich goto out; 987d39d938cSVlad Yasevich 988d39d938cSVlad Yasevich err = udp_v6_send_skb(skb, &fl6); 989d39d938cSVlad Yasevich 990db8dac20SDavid S. Miller out: 991db8dac20SDavid S. Miller up->len = 0; 992db8dac20SDavid S. Miller up->pending = 0; 993db8dac20SDavid S. Miller return err; 994db8dac20SDavid S. Miller } 995db8dac20SDavid S. Miller 9961b784140SYing Xue int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) 997db8dac20SDavid S. Miller { 998db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 999db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 1000db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 1001db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 1002342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 100320c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 1004db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 100545f6fad8SEric Dumazet struct ipv6_txoptions *opt_to_free = NULL; 1006db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 10074c9483b2SDavid S. Miller struct flowi6 fl6; 1008db8dac20SDavid S. Miller struct dst_entry *dst; 100926879da5SWei Wang struct ipcm6_cookie ipc6; 1010db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 1011db8dac20SDavid S. Miller int ulen = len; 1012db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 1013db8dac20SDavid S. Miller int err; 1014db8dac20SDavid S. Miller int connected = 0; 1015db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 1016db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 1017ad1e46a8SSoheil Hassas Yeganeh struct sockcm_cookie sockc; 1018db8dac20SDavid S. Miller 101926879da5SWei Wang ipc6.hlimit = -1; 102026879da5SWei Wang ipc6.tclass = -1; 102126879da5SWei Wang ipc6.dontfrag = -1; 102226879da5SWei Wang 1023db8dac20SDavid S. Miller /* destination address check */ 1024db8dac20SDavid S. Miller if (sin6) { 1025db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 1026db8dac20SDavid S. Miller return -EINVAL; 1027db8dac20SDavid S. Miller 1028db8dac20SDavid S. Miller switch (sin6->sin6_family) { 1029db8dac20SDavid S. Miller case AF_INET6: 1030db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 1031db8dac20SDavid S. Miller return -EINVAL; 1032db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1033db8dac20SDavid S. Miller break; 1034db8dac20SDavid S. Miller case AF_INET: 1035db8dac20SDavid S. Miller goto do_udp_sendmsg; 1036db8dac20SDavid S. Miller case AF_UNSPEC: 1037db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 1038db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 1039db8dac20SDavid S. Miller daddr = NULL; 1040db8dac20SDavid S. Miller break; 1041db8dac20SDavid S. Miller default: 1042db8dac20SDavid S. Miller return -EINVAL; 1043db8dac20SDavid S. Miller } 1044db8dac20SDavid S. Miller } else if (!up->pending) { 1045db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1046db8dac20SDavid S. Miller return -EDESTADDRREQ; 1047efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1048db8dac20SDavid S. Miller } else 1049db8dac20SDavid S. Miller daddr = NULL; 1050db8dac20SDavid S. Miller 1051db8dac20SDavid S. Miller if (daddr) { 1052db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 1053db8dac20SDavid S. Miller struct sockaddr_in sin; 1054db8dac20SDavid S. Miller sin.sin_family = AF_INET; 1055c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 1056db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1057db8dac20SDavid S. Miller msg->msg_name = &sin; 1058db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 1059db8dac20SDavid S. Miller do_udp_sendmsg: 1060db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 1061db8dac20SDavid S. Miller return -ENETUNREACH; 10621b784140SYing Xue return udp_sendmsg(sk, msg, len); 1063db8dac20SDavid S. Miller } 1064db8dac20SDavid S. Miller } 1065db8dac20SDavid S. Miller 1066db8dac20SDavid S. Miller if (up->pending == AF_INET) 10671b784140SYing Xue return udp_sendmsg(sk, msg, len); 1068db8dac20SDavid S. Miller 1069db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1070db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1071db8dac20SDavid S. Miller */ 1072db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1073db8dac20SDavid S. Miller return -EMSGSIZE; 1074db8dac20SDavid S. Miller 107503485f2aSVlad Yasevich getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1076db8dac20SDavid S. Miller if (up->pending) { 1077db8dac20SDavid S. Miller /* 1078db8dac20SDavid S. Miller * There are pending frames. 1079db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1080db8dac20SDavid S. Miller */ 1081db8dac20SDavid S. Miller lock_sock(sk); 1082db8dac20SDavid S. Miller if (likely(up->pending)) { 1083db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1084db8dac20SDavid S. Miller release_sock(sk); 1085db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1086db8dac20SDavid S. Miller } 1087db8dac20SDavid S. Miller dst = NULL; 1088db8dac20SDavid S. Miller goto do_append_data; 1089db8dac20SDavid S. Miller } 1090db8dac20SDavid S. Miller release_sock(sk); 1091db8dac20SDavid S. Miller } 1092db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1093db8dac20SDavid S. Miller 10944c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 1095db8dac20SDavid S. Miller 1096db8dac20SDavid S. Miller if (sin6) { 1097db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1098db8dac20SDavid S. Miller return -EINVAL; 1099db8dac20SDavid S. Miller 11001958b856SDavid S. Miller fl6.fl6_dport = sin6->sin6_port; 1101db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1102db8dac20SDavid S. Miller 1103db8dac20SDavid S. Miller if (np->sndflow) { 11044c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 11054c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 11064c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 110763159f29SIan Morris if (!flowlabel) 1108db8dac20SDavid S. Miller return -EINVAL; 1109db8dac20SDavid S. Miller } 1110db8dac20SDavid S. Miller } 1111db8dac20SDavid S. Miller 1112db8dac20SDavid S. Miller /* 1113db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1114db8dac20SDavid S. Miller * sk->sk_dst_cache. 1115db8dac20SDavid S. Miller */ 1116db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1117efe4208fSEric Dumazet ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) 1118efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1119db8dac20SDavid S. Miller 1120db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1121db8dac20SDavid S. Miller sin6->sin6_scope_id && 1122842df073SHannes Frederic Sowa __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) 11234c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 1124db8dac20SDavid S. Miller } else { 1125db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1126db8dac20SDavid S. Miller return -EDESTADDRREQ; 1127db8dac20SDavid S. Miller 11281958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 1129efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 11304c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 1131db8dac20SDavid S. Miller connected = 1; 1132db8dac20SDavid S. Miller } 1133db8dac20SDavid S. Miller 11344c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11354c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 1136db8dac20SDavid S. Miller 11374c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11384c9483b2SDavid S. Miller fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 11399f690db7SYang Hongyang 11404c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 1141e2d118a1SLorenzo Colitti fl6.flowi6_uid = sk->sk_uid; 1142c14ac945SSoheil Hassas Yeganeh sockc.tsflags = sk->sk_tsflags; 114351953d5bSBrian Haley 1144db8dac20SDavid S. Miller if (msg->msg_controllen) { 1145db8dac20SDavid S. Miller opt = &opt_space; 1146db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1147db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 114826879da5SWei Wang ipc6.opt = opt; 1149db8dac20SDavid S. Miller 115026879da5SWei Wang err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6, &sockc); 1151db8dac20SDavid S. Miller if (err < 0) { 1152db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1153db8dac20SDavid S. Miller return err; 1154db8dac20SDavid S. Miller } 11554c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 11564c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 115763159f29SIan Morris if (!flowlabel) 1158db8dac20SDavid S. Miller return -EINVAL; 1159db8dac20SDavid S. Miller } 1160db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1161db8dac20SDavid S. Miller opt = NULL; 1162db8dac20SDavid S. Miller connected = 0; 1163db8dac20SDavid S. Miller } 116445f6fad8SEric Dumazet if (!opt) { 116545f6fad8SEric Dumazet opt = txopt_get(np); 116645f6fad8SEric Dumazet opt_to_free = opt; 116745f6fad8SEric Dumazet } 1168db8dac20SDavid S. Miller if (flowlabel) 1169db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1170db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 117126879da5SWei Wang ipc6.opt = opt; 1172db8dac20SDavid S. Miller 11734c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 1174876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 11754e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr; 1176876c7f41SBrian Haley else 11774c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 11784c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 11794e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 11801958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 1181db8dac20SDavid S. Miller 11824c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 118320c59de2SArnaud Ebalard if (final_p) 1184db8dac20SDavid S. Miller connected = 0; 1185db8dac20SDavid S. Miller 11864c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { 11874c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 1188db8dac20SDavid S. Miller connected = 0; 1189c4062dfcSErich E. Hoover } else if (!fl6.flowi6_oif) 1190c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif; 1191db8dac20SDavid S. Miller 11924c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 1193db8dac20SDavid S. Miller 119438b7097bSHannes Frederic Sowa if (ipc6.tclass < 0) 119538b7097bSHannes Frederic Sowa ipc6.tclass = np->tclass; 119638b7097bSHannes Frederic Sowa 119738b7097bSHannes Frederic Sowa fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel); 119838b7097bSHannes Frederic Sowa 11990e0d44abSSteffen Klassert dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p); 120068d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 120168d0c6d3SDavid S. Miller err = PTR_ERR(dst); 120268d0c6d3SDavid S. Miller dst = NULL; 1203db8dac20SDavid S. Miller goto out; 1204db8dac20SDavid S. Miller } 1205db8dac20SDavid S. Miller 120626879da5SWei Wang if (ipc6.hlimit < 0) 120726879da5SWei Wang ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); 1208db8dac20SDavid S. Miller 1209db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1210db8dac20SDavid S. Miller goto do_confirm; 1211db8dac20SDavid S. Miller back_from_confirm: 1212db8dac20SDavid S. Miller 121303485f2aSVlad Yasevich /* Lockless fast path for the non-corking case */ 121403485f2aSVlad Yasevich if (!corkreq) { 121503485f2aSVlad Yasevich struct sk_buff *skb; 121603485f2aSVlad Yasevich 121703485f2aSVlad Yasevich skb = ip6_make_skb(sk, getfrag, msg, ulen, 121826879da5SWei Wang sizeof(struct udphdr), &ipc6, 121903485f2aSVlad Yasevich &fl6, (struct rt6_info *)dst, 122026879da5SWei Wang msg->msg_flags, &sockc); 122103485f2aSVlad Yasevich err = PTR_ERR(skb); 122203485f2aSVlad Yasevich if (!IS_ERR_OR_NULL(skb)) 122303485f2aSVlad Yasevich err = udp_v6_send_skb(skb, &fl6); 122403485f2aSVlad Yasevich goto release_dst; 122503485f2aSVlad Yasevich } 122603485f2aSVlad Yasevich 1227db8dac20SDavid S. Miller lock_sock(sk); 1228db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1229db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1230db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1231db8dac20SDavid S. Miller release_sock(sk); 1232db8dac20SDavid S. Miller 1233ba7a46f1SJoe Perches net_dbg_ratelimited("udp cork app bug 2\n"); 1234db8dac20SDavid S. Miller err = -EINVAL; 1235db8dac20SDavid S. Miller goto out; 1236db8dac20SDavid S. Miller } 1237db8dac20SDavid S. Miller 1238db8dac20SDavid S. Miller up->pending = AF_INET6; 1239db8dac20SDavid S. Miller 1240db8dac20SDavid S. Miller do_append_data: 124126879da5SWei Wang if (ipc6.dontfrag < 0) 124226879da5SWei Wang ipc6.dontfrag = np->dontfrag; 1243db8dac20SDavid S. Miller up->len += ulen; 124426879da5SWei Wang err = ip6_append_data(sk, getfrag, msg, ulen, sizeof(struct udphdr), 124526879da5SWei Wang &ipc6, &fl6, (struct rt6_info *)dst, 124626879da5SWei Wang corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, &sockc); 1247db8dac20SDavid S. Miller if (err) 1248db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1249db8dac20SDavid S. Miller else if (!corkreq) 1250db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1251db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1252db8dac20SDavid S. Miller up->pending = 0; 1253db8dac20SDavid S. Miller 125403485f2aSVlad Yasevich if (err > 0) 125503485f2aSVlad Yasevich err = np->recverr ? net_xmit_errno(err) : 0; 125603485f2aSVlad Yasevich release_sock(sk); 125703485f2aSVlad Yasevich 125803485f2aSVlad Yasevich release_dst: 1259db8dac20SDavid S. Miller if (dst) { 1260db8dac20SDavid S. Miller if (connected) { 1261db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 1262efe4208fSEric Dumazet ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? 1263efe4208fSEric Dumazet &sk->sk_v6_daddr : NULL, 1264db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 12654c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1266db8dac20SDavid S. Miller &np->saddr : 1267db8dac20SDavid S. Miller #endif 1268db8dac20SDavid S. Miller NULL); 1269db8dac20SDavid S. Miller } else { 1270db8dac20SDavid S. Miller dst_release(dst); 1271db8dac20SDavid S. Miller } 1272a3c96089SYOSHIFUJI Hideaki dst = NULL; 1273db8dac20SDavid S. Miller } 1274db8dac20SDavid S. Miller 1275db8dac20SDavid S. Miller out: 1276a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1277db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 127845f6fad8SEric Dumazet txopt_put(opt_to_free); 1279db8dac20SDavid S. Miller if (!err) 1280db8dac20SDavid S. Miller return len; 1281db8dac20SDavid S. Miller /* 1282db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1283db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1284db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1285db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1286db8dac20SDavid S. Miller * seems like overkill. 1287db8dac20SDavid S. Miller */ 1288db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 12896aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 1290235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1291db8dac20SDavid S. Miller } 1292db8dac20SDavid S. Miller return err; 1293db8dac20SDavid S. Miller 1294db8dac20SDavid S. Miller do_confirm: 1295db8dac20SDavid S. Miller dst_confirm(dst); 1296db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1297db8dac20SDavid S. Miller goto back_from_confirm; 1298db8dac20SDavid S. Miller err = 0; 1299db8dac20SDavid S. Miller goto out; 1300db8dac20SDavid S. Miller } 1301db8dac20SDavid S. Miller 13027d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1303db8dac20SDavid S. Miller { 130444046a59STom Parkin struct udp_sock *up = udp_sk(sk); 1305db8dac20SDavid S. Miller lock_sock(sk); 1306db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1307db8dac20SDavid S. Miller release_sock(sk); 1308db8dac20SDavid S. Miller 130944046a59STom Parkin if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 131044046a59STom Parkin void (*encap_destroy)(struct sock *sk); 131144046a59STom Parkin encap_destroy = ACCESS_ONCE(up->encap_destroy); 131244046a59STom Parkin if (encap_destroy) 131344046a59STom Parkin encap_destroy(sk); 131444046a59STom Parkin } 131544046a59STom Parkin 1316db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1317db8dac20SDavid S. Miller } 1318db8dac20SDavid S. Miller 1319db8dac20SDavid S. Miller /* 1320db8dac20SDavid S. Miller * Socket option code for UDP 1321db8dac20SDavid S. Miller */ 1322db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1323b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1324db8dac20SDavid S. Miller { 1325db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1326db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1327db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1328db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1329db8dac20SDavid S. Miller } 1330db8dac20SDavid S. Miller 1331db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1332db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1333b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1334db8dac20SDavid S. Miller { 1335db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1336db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1337db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1338db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1339db8dac20SDavid S. Miller } 1340db8dac20SDavid S. Miller #endif 1341db8dac20SDavid S. Miller 1342db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1343db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1344db8dac20SDavid S. Miller { 1345db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1346db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1347db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1348db8dac20SDavid S. Miller } 1349db8dac20SDavid S. Miller 1350db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1351db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1352db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1353db8dac20SDavid S. Miller { 1354db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1355db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1356db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1357db8dac20SDavid S. Miller } 1358db8dac20SDavid S. Miller #endif 1359db8dac20SDavid S. Miller 136041135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1361db8dac20SDavid S. Miller .handler = udpv6_rcv, 1362db8dac20SDavid S. Miller .err_handler = udpv6_err, 1363db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1364db8dac20SDavid S. Miller }; 1365db8dac20SDavid S. Miller 1366db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1367db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1368db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1369db8dac20SDavid S. Miller { 137017ef66afSLorenzo Colitti if (v == SEQ_START_TOKEN) { 137117ef66afSLorenzo Colitti seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); 137217ef66afSLorenzo Colitti } else { 137317ef66afSLorenzo Colitti int bucket = ((struct udp_iter_state *)seq->private)->bucket; 137417ef66afSLorenzo Colitti struct inet_sock *inet = inet_sk(v); 137517ef66afSLorenzo Colitti __u16 srcp = ntohs(inet->inet_sport); 137617ef66afSLorenzo Colitti __u16 destp = ntohs(inet->inet_dport); 137717ef66afSLorenzo Colitti ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); 137817ef66afSLorenzo Colitti } 1379db8dac20SDavid S. Miller return 0; 1380db8dac20SDavid S. Miller } 1381db8dac20SDavid S. Miller 138273cb88ecSArjan van de Ven static const struct file_operations udp6_afinfo_seq_fops = { 138373cb88ecSArjan van de Ven .owner = THIS_MODULE, 138473cb88ecSArjan van de Ven .open = udp_seq_open, 138573cb88ecSArjan van de Ven .read = seq_read, 138673cb88ecSArjan van de Ven .llseek = seq_lseek, 138773cb88ecSArjan van de Ven .release = seq_release_net 138873cb88ecSArjan van de Ven }; 138973cb88ecSArjan van de Ven 1390db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1391db8dac20SDavid S. Miller .name = "udp6", 1392db8dac20SDavid S. Miller .family = AF_INET6, 1393645ca708SEric Dumazet .udp_table = &udp_table, 139473cb88ecSArjan van de Ven .seq_fops = &udp6_afinfo_seq_fops, 1395dda61925SDenis V. Lunev .seq_ops = { 1396dda61925SDenis V. Lunev .show = udp6_seq_show, 1397dda61925SDenis V. Lunev }, 1398db8dac20SDavid S. Miller }; 1399db8dac20SDavid S. Miller 14002c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1401db8dac20SDavid S. Miller { 14020c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1403db8dac20SDavid S. Miller } 1404db8dac20SDavid S. Miller 1405ec120da6SIan Morris void udp6_proc_exit(struct net *net) 1406ec120da6SIan Morris { 14070c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1408db8dac20SDavid S. Miller } 1409db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1410db8dac20SDavid S. Miller 1411db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1412db8dac20SDavid S. Miller 1413db8dac20SDavid S. Miller struct proto udpv6_prot = { 1414db8dac20SDavid S. Miller .name = "UDPv6", 1415db8dac20SDavid S. Miller .owner = THIS_MODULE, 1416db8dac20SDavid S. Miller .close = udp_lib_close, 1417db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1418db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1419db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1420850cbaddSPaolo Abeni .init = udp_init_sock, 1421db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1422db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1423db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1424db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1425db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1426e646b657SMartin KaFai Lau .release_cb = ip6_datagram_release_cb, 1427db8dac20SDavid S. Miller .hash = udp_lib_hash, 1428db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1429719f8358SEric Dumazet .rehash = udp_v6_rehash, 1430db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1431db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1432db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1433db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1434db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1435db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1436645ca708SEric Dumazet .h.udp_table = &udp_table, 1437db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1438db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1439db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1440db8dac20SDavid S. Miller #endif 14415d77dca8SDavid Ahern .diag_destroy = udp_abort, 1442db8dac20SDavid S. Miller }; 1443db8dac20SDavid S. Miller 1444db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1445db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1446db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1447db8dac20SDavid S. Miller .prot = &udpv6_prot, 1448db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1449db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1450db8dac20SDavid S. Miller }; 1451db8dac20SDavid S. Miller 1452db8dac20SDavid S. Miller int __init udpv6_init(void) 1453db8dac20SDavid S. Miller { 1454db8dac20SDavid S. Miller int ret; 1455db8dac20SDavid S. Miller 14563336288aSVlad Yasevich ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 14573336288aSVlad Yasevich if (ret) 1458c6b641a4SVlad Yasevich goto out; 14593336288aSVlad Yasevich 1460db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1461db8dac20SDavid S. Miller if (ret) 1462db8dac20SDavid S. Miller goto out_udpv6_protocol; 1463db8dac20SDavid S. Miller out: 1464db8dac20SDavid S. Miller return ret; 1465db8dac20SDavid S. Miller 1466db8dac20SDavid S. Miller out_udpv6_protocol: 1467db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1468db8dac20SDavid S. Miller goto out; 1469db8dac20SDavid S. Miller } 1470db8dac20SDavid S. Miller 1471db8dac20SDavid S. Miller void udpv6_exit(void) 1472db8dac20SDavid S. Miller { 1473db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1474db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1475db8dac20SDavid S. Miller } 1476