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 118645ca708SEric Dumazet static inline int compute_score(struct sock *sk, struct net *net, 119645ca708SEric Dumazet unsigned short hnum, 12088440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 12188440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 122645ca708SEric Dumazet int dif) 123db8dac20SDavid S. Miller { 12460c04aecSJoe Perches int score; 12560c04aecSJoe Perches struct inet_sock *inet; 126db8dac20SDavid S. Miller 12760c04aecSJoe Perches if (!net_eq(sock_net(sk), net) || 12860c04aecSJoe Perches udp_sk(sk)->udp_port_hash != hnum || 12960c04aecSJoe Perches sk->sk_family != PF_INET6) 13060c04aecSJoe Perches return -1; 131645ca708SEric Dumazet 132645ca708SEric Dumazet score = 0; 13360c04aecSJoe Perches inet = inet_sk(sk); 13460c04aecSJoe Perches 135c720c7e8SEric Dumazet if (inet->inet_dport) { 136c720c7e8SEric Dumazet if (inet->inet_dport != sport) 137645ca708SEric Dumazet return -1; 138db8dac20SDavid S. Miller score++; 139db8dac20SDavid S. Miller } 14060c04aecSJoe Perches 141efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { 142efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) 143645ca708SEric Dumazet return -1; 144db8dac20SDavid S. Miller score++; 145db8dac20SDavid S. Miller } 14660c04aecSJoe Perches 147efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 148efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) 149645ca708SEric Dumazet return -1; 150db8dac20SDavid S. Miller score++; 151db8dac20SDavid S. Miller } 15260c04aecSJoe Perches 153db8dac20SDavid S. Miller if (sk->sk_bound_dev_if) { 154db8dac20SDavid S. Miller if (sk->sk_bound_dev_if != dif) 155645ca708SEric Dumazet return -1; 156db8dac20SDavid S. Miller score++; 157db8dac20SDavid S. Miller } 15860c04aecSJoe Perches 15970da268bSEric Dumazet if (sk->sk_incoming_cpu == raw_smp_processor_id()) 16070da268bSEric Dumazet score++; 16170da268bSEric Dumazet 162645ca708SEric Dumazet return score; 163645ca708SEric Dumazet } 164645ca708SEric Dumazet 165fddc17deSEric Dumazet static inline int compute_score2(struct sock *sk, struct net *net, 166fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 16760c04aecSJoe Perches const struct in6_addr *daddr, 16860c04aecSJoe Perches unsigned short hnum, int dif) 169fddc17deSEric Dumazet { 17060c04aecSJoe Perches int score; 17160c04aecSJoe Perches struct inet_sock *inet; 172fddc17deSEric Dumazet 17360c04aecSJoe Perches if (!net_eq(sock_net(sk), net) || 17460c04aecSJoe Perches udp_sk(sk)->udp_port_hash != hnum || 17560c04aecSJoe Perches sk->sk_family != PF_INET6) 17660c04aecSJoe Perches return -1; 177fddc17deSEric Dumazet 178efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) 179fddc17deSEric Dumazet return -1; 18060c04aecSJoe Perches 181fddc17deSEric Dumazet score = 0; 18260c04aecSJoe Perches inet = inet_sk(sk); 18360c04aecSJoe Perches 184fddc17deSEric Dumazet if (inet->inet_dport) { 185fddc17deSEric Dumazet if (inet->inet_dport != sport) 186fddc17deSEric Dumazet return -1; 187fddc17deSEric Dumazet score++; 188fddc17deSEric Dumazet } 18960c04aecSJoe Perches 190efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 191efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) 192fddc17deSEric Dumazet return -1; 193fddc17deSEric Dumazet score++; 194fddc17deSEric Dumazet } 19560c04aecSJoe Perches 196fddc17deSEric Dumazet if (sk->sk_bound_dev_if) { 197fddc17deSEric Dumazet if (sk->sk_bound_dev_if != dif) 198fddc17deSEric Dumazet return -1; 199fddc17deSEric Dumazet score++; 200fddc17deSEric Dumazet } 20160c04aecSJoe Perches 20270da268bSEric Dumazet if (sk->sk_incoming_cpu == raw_smp_processor_id()) 20370da268bSEric Dumazet score++; 20470da268bSEric Dumazet 205fddc17deSEric Dumazet return score; 206fddc17deSEric Dumazet } 207fddc17deSEric Dumazet 208fddc17deSEric Dumazet /* called with read_rcu_lock() */ 209fddc17deSEric Dumazet static struct sock *udp6_lib_lookup2(struct net *net, 210fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 211fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned int hnum, int dif, 2121134158bSCraig Gallek struct udp_hslot *hslot2, unsigned int slot2, 2131134158bSCraig Gallek struct sk_buff *skb) 214fddc17deSEric Dumazet { 215fddc17deSEric Dumazet struct sock *sk, *result; 21672289b96STom Herbert int score, badness, matches = 0, reuseport = 0; 21772289b96STom Herbert u32 hash = 0; 218fddc17deSEric Dumazet 219fddc17deSEric Dumazet result = NULL; 220fddc17deSEric Dumazet badness = -1; 221ca065d0cSEric Dumazet udp_portaddr_for_each_entry_rcu(sk, &hslot2->head) { 222fddc17deSEric Dumazet score = compute_score2(sk, net, saddr, sport, 223fddc17deSEric Dumazet daddr, hnum, dif); 224fddc17deSEric Dumazet if (score > badness) { 22572289b96STom Herbert reuseport = sk->sk_reuseport; 22672289b96STom Herbert if (reuseport) { 227b50026b5SHannes Frederic Sowa hash = udp6_ehashfn(net, daddr, hnum, 22872289b96STom Herbert saddr, sport); 229ed0dfffdSEric Dumazet 230ca065d0cSEric Dumazet result = reuseport_select_sock(sk, hash, skb, 2311134158bSCraig Gallek sizeof(struct udphdr)); 232ca065d0cSEric Dumazet if (result) 233ca065d0cSEric Dumazet return result; 23472289b96STom Herbert matches = 1; 23570da268bSEric Dumazet } 236ca065d0cSEric Dumazet result = sk; 237ca065d0cSEric Dumazet badness = score; 23872289b96STom Herbert } else if (score == badness && reuseport) { 23972289b96STom Herbert matches++; 2408fc54f68SDaniel Borkmann if (reciprocal_scale(hash, matches) == 0) 24172289b96STom Herbert result = sk; 24272289b96STom Herbert hash = next_pseudo_random32(hash); 243fddc17deSEric Dumazet } 244fddc17deSEric Dumazet } 245fddc17deSEric Dumazet return result; 246fddc17deSEric Dumazet } 247fddc17deSEric Dumazet 248ca065d0cSEric Dumazet /* rcu_read_lock() must be held */ 249fce82338SPavel Emelyanov struct sock *__udp6_lib_lookup(struct net *net, 25088440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 25188440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 252538950a1SCraig Gallek int dif, struct udp_table *udptable, 253538950a1SCraig Gallek struct sk_buff *skb) 254645ca708SEric Dumazet { 255271b72c7SEric Dumazet struct sock *sk, *result; 256645ca708SEric Dumazet unsigned short hnum = ntohs(dport); 257fddc17deSEric Dumazet unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); 258fddc17deSEric Dumazet struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; 25972289b96STom Herbert int score, badness, matches = 0, reuseport = 0; 26072289b96STom Herbert u32 hash = 0; 261645ca708SEric Dumazet 262fddc17deSEric Dumazet if (hslot->count > 10) { 263fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, daddr, hnum); 264fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 265fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 266fddc17deSEric Dumazet if (hslot->count < hslot2->count) 267fddc17deSEric Dumazet goto begin; 268fddc17deSEric Dumazet 269fddc17deSEric Dumazet result = udp6_lib_lookup2(net, saddr, sport, 270fddc17deSEric Dumazet daddr, hnum, dif, 2711134158bSCraig Gallek hslot2, slot2, skb); 272fddc17deSEric Dumazet if (!result) { 273fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); 274fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 275fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 276fddc17deSEric Dumazet if (hslot->count < hslot2->count) 277fddc17deSEric Dumazet goto begin; 278fddc17deSEric Dumazet 2791223c67cSJorge Boncompte [DTI2] result = udp6_lib_lookup2(net, saddr, sport, 2801223c67cSJorge Boncompte [DTI2] &in6addr_any, hnum, dif, 2811134158bSCraig Gallek hslot2, slot2, skb); 282fddc17deSEric Dumazet } 283fddc17deSEric Dumazet return result; 284fddc17deSEric Dumazet } 285271b72c7SEric Dumazet begin: 286271b72c7SEric Dumazet result = NULL; 287271b72c7SEric Dumazet badness = -1; 288ca065d0cSEric Dumazet sk_for_each_rcu(sk, &hslot->head) { 289645ca708SEric Dumazet score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); 290645ca708SEric Dumazet if (score > badness) { 29172289b96STom Herbert reuseport = sk->sk_reuseport; 29272289b96STom Herbert if (reuseport) { 293b50026b5SHannes Frederic Sowa hash = udp6_ehashfn(net, daddr, hnum, 29472289b96STom Herbert saddr, sport); 295ca065d0cSEric Dumazet result = reuseport_select_sock(sk, hash, skb, 296538950a1SCraig Gallek sizeof(struct udphdr)); 297ca065d0cSEric Dumazet if (result) 298ca065d0cSEric Dumazet return result; 29972289b96STom Herbert matches = 1; 30072289b96STom Herbert } 301ca065d0cSEric Dumazet result = sk; 302ca065d0cSEric Dumazet badness = score; 30372289b96STom Herbert } else if (score == badness && reuseport) { 30472289b96STom Herbert matches++; 3058fc54f68SDaniel Borkmann if (reciprocal_scale(hash, matches) == 0) 30672289b96STom Herbert result = sk; 30772289b96STom Herbert hash = next_pseudo_random32(hash); 308db8dac20SDavid S. Miller } 309db8dac20SDavid S. Miller } 310db8dac20SDavid S. Miller return result; 311db8dac20SDavid S. Miller } 312fce82338SPavel Emelyanov EXPORT_SYMBOL_GPL(__udp6_lib_lookup); 313db8dac20SDavid S. Miller 314607c4aafSKOVACS Krisztian static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, 315607c4aafSKOVACS Krisztian __be16 sport, __be16 dport, 316645ca708SEric Dumazet struct udp_table *udptable) 317607c4aafSKOVACS Krisztian { 31823542618SKOVACS Krisztian struct sock *sk; 319b71d1d42SEric Dumazet const struct ipv6hdr *iph = ipv6_hdr(skb); 320607c4aafSKOVACS Krisztian 321e5d08d71SIan Morris sk = skb_steal_sock(skb); 322e5d08d71SIan Morris if (unlikely(sk)) 32323542618SKOVACS Krisztian return sk; 324adf30907SEric Dumazet return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, 325607c4aafSKOVACS Krisztian &iph->daddr, dport, inet6_iif(skb), 326538950a1SCraig Gallek udptable, skb); 327607c4aafSKOVACS Krisztian } 328607c4aafSKOVACS Krisztian 32963058308STom Herbert struct sock *udp6_lib_lookup_skb(struct sk_buff *skb, 33063058308STom Herbert __be16 sport, __be16 dport) 33163058308STom Herbert { 33263058308STom Herbert const struct ipv6hdr *iph = ipv6_hdr(skb); 33363058308STom Herbert const struct net_device *dev = 33463058308STom Herbert skb_dst(skb) ? skb_dst(skb)->dev : skb->dev; 33563058308STom Herbert 33663058308STom Herbert return __udp6_lib_lookup(dev_net(dev), &iph->saddr, sport, 33763058308STom Herbert &iph->daddr, dport, inet6_iif(skb), 33863058308STom Herbert &udp_table, skb); 33963058308STom Herbert } 34063058308STom Herbert EXPORT_SYMBOL_GPL(udp6_lib_lookup_skb); 34163058308STom Herbert 342ca065d0cSEric Dumazet /* Must be called under rcu_read_lock(). 343ca065d0cSEric Dumazet * Does increment socket refcount. 344ca065d0cSEric Dumazet */ 345ca065d0cSEric Dumazet #if IS_ENABLED(CONFIG_NETFILTER_XT_MATCH_SOCKET) || \ 346ca065d0cSEric Dumazet IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TPROXY) 347aa976fc0SBalazs Scheidler struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, 348aa976fc0SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, int dif) 349aa976fc0SBalazs Scheidler { 350ca065d0cSEric Dumazet struct sock *sk; 351ca065d0cSEric Dumazet 352ca065d0cSEric Dumazet sk = __udp6_lib_lookup(net, saddr, sport, daddr, dport, 353ca065d0cSEric Dumazet dif, &udp_table, NULL); 354ca065d0cSEric Dumazet if (sk && !atomic_inc_not_zero(&sk->sk_refcnt)) 355ca065d0cSEric Dumazet sk = NULL; 356ca065d0cSEric Dumazet return sk; 357aa976fc0SBalazs Scheidler } 358aa976fc0SBalazs Scheidler EXPORT_SYMBOL_GPL(udp6_lib_lookup); 359ca065d0cSEric Dumazet #endif 360aa976fc0SBalazs Scheidler 361db8dac20SDavid S. Miller /* 362db8dac20SDavid S. Miller * This should be easy, if there is something there we 363db8dac20SDavid S. Miller * return it, otherwise we block. 364db8dac20SDavid S. Miller */ 365db8dac20SDavid S. Miller 3661b784140SYing Xue int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 367db8dac20SDavid S. Miller int noblock, int flags, int *addr_len) 368db8dac20SDavid S. Miller { 369db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 370db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 371db8dac20SDavid S. Miller struct sk_buff *skb; 37259c2cdaeSDavid S. Miller unsigned int ulen, copied; 373627d2d6bSsamanthakumar int peeked, peeking, off; 374db8dac20SDavid S. Miller int err; 375db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 376197c949eSEric Dumazet bool checksum_valid = false; 377f26ba175SWei Yongjun int is_udp4; 3788a74ad60SEric Dumazet bool slow; 379db8dac20SDavid S. Miller 380db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 38185fbaa75SHannes Frederic Sowa return ipv6_recv_error(sk, msg, len, addr_len); 382db8dac20SDavid S. Miller 3834b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 38485fbaa75SHannes Frederic Sowa return ipv6_recv_rxpmtu(sk, msg, len, addr_len); 3854b340ae2SBrian Haley 386db8dac20SDavid S. Miller try_again: 387627d2d6bSsamanthakumar peeking = off = sk_peek_offset(sk, flags); 388db8dac20SDavid S. Miller skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), 3893f518bf7SPavel Emelyanov &peeked, &off, &err); 390db8dac20SDavid S. Miller if (!skb) 391627d2d6bSsamanthakumar return err; 392db8dac20SDavid S. Miller 393e6afc8acSsamanthakumar ulen = skb->len; 39459c2cdaeSDavid S. Miller copied = len; 395627d2d6bSsamanthakumar if (copied > ulen - off) 396627d2d6bSsamanthakumar copied = ulen - off; 39759c2cdaeSDavid S. Miller else if (copied < ulen) 398db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 399db8dac20SDavid S. Miller 400f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 401f26ba175SWei Yongjun 402db8dac20SDavid S. Miller /* 403db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 404db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 405db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 406db8dac20SDavid S. Miller */ 407db8dac20SDavid S. Miller 408627d2d6bSsamanthakumar if (copied < ulen || UDP_SKB_CB(skb)->partial_cov || peeking) { 409197c949eSEric Dumazet checksum_valid = !udp_lib_checksum_complete(skb); 410197c949eSEric Dumazet if (!checksum_valid) 411db8dac20SDavid S. Miller goto csum_copy_err; 412db8dac20SDavid S. Miller } 413db8dac20SDavid S. Miller 414197c949eSEric Dumazet if (checksum_valid || skb_csum_unnecessary(skb)) 415627d2d6bSsamanthakumar err = skb_copy_datagram_msg(skb, off, msg, copied); 416db8dac20SDavid S. Miller else { 417627d2d6bSsamanthakumar err = skb_copy_and_csum_datagram_msg(skb, off, msg); 418db8dac20SDavid S. Miller if (err == -EINVAL) 419db8dac20SDavid S. Miller goto csum_copy_err; 420db8dac20SDavid S. Miller } 42122911fc5SEric Dumazet if (unlikely(err)) { 42222911fc5SEric Dumazet trace_kfree_skb(skb, udpv6_recvmsg); 423979402b1SEric Dumazet if (!peeked) { 424979402b1SEric Dumazet atomic_inc(&sk->sk_drops); 425979402b1SEric Dumazet if (is_udp4) 4266aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, 427979402b1SEric Dumazet is_udplite); 428979402b1SEric Dumazet else 4296aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, 430979402b1SEric Dumazet is_udplite); 431979402b1SEric Dumazet } 432627d2d6bSsamanthakumar skb_free_datagram_locked(sk, skb); 433627d2d6bSsamanthakumar return err; 43422911fc5SEric Dumazet } 435f26ba175SWei Yongjun if (!peeked) { 436f26ba175SWei Yongjun if (is_udp4) 4376aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, 4386aef70a8SEric Dumazet is_udplite); 439f26ba175SWei Yongjun else 4406aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, 4416aef70a8SEric Dumazet is_udplite); 442f26ba175SWei Yongjun } 443db8dac20SDavid S. Miller 4443b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 445db8dac20SDavid S. Miller 446db8dac20SDavid S. Miller /* Copy the address. */ 447db8dac20SDavid S. Miller if (msg->msg_name) { 448342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 449db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 450db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 451db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 452db8dac20SDavid S. Miller 453842df073SHannes Frederic Sowa if (is_udp4) { 454b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 455b301e82cSBrian Haley &sin6->sin6_addr); 456842df073SHannes Frederic Sowa sin6->sin6_scope_id = 0; 457842df073SHannes Frederic Sowa } else { 4584e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr; 459842df073SHannes Frederic Sowa sin6->sin6_scope_id = 460842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin6->sin6_addr, 4614330487aSDuan Jiong inet6_iif(skb)); 462db8dac20SDavid S. Miller } 463bceaa902SHannes Frederic Sowa *addr_len = sizeof(*sin6); 464db8dac20SDavid S. Miller } 4654b261c75SHannes Frederic Sowa 4664b261c75SHannes Frederic Sowa if (np->rxopt.all) 4674b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 4684b261c75SHannes Frederic Sowa 469f26ba175SWei Yongjun if (is_udp4) { 470db8dac20SDavid S. Miller if (inet->cmsg_flags) 471db8dac20SDavid S. Miller ip_cmsg_recv(msg, skb); 472db8dac20SDavid S. Miller } else { 473db8dac20SDavid S. Miller if (np->rxopt.all) 4744b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 475db8dac20SDavid S. Miller } 476db8dac20SDavid S. Miller 47759c2cdaeSDavid S. Miller err = copied; 478db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 479db8dac20SDavid S. Miller err = ulen; 480db8dac20SDavid S. Miller 481627d2d6bSsamanthakumar __skb_free_datagram_locked(sk, skb, peeking ? -err : err); 482db8dac20SDavid S. Miller return err; 483db8dac20SDavid S. Miller 484db8dac20SDavid S. Miller csum_copy_err: 4858a74ad60SEric Dumazet slow = lock_sock_fast(sk); 4860856f939SWei Yongjun if (!skb_kill_datagram(sk, skb, flags)) { 4876a5dc9e5SEric Dumazet if (is_udp4) { 4886aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), 4896a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 4906aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), 4910856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4926a5dc9e5SEric Dumazet } else { 4936aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 4946a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 4956aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 4960856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4970856f939SWei Yongjun } 4986a5dc9e5SEric Dumazet } 4998a74ad60SEric Dumazet unlock_sock_fast(sk, slow); 500db8dac20SDavid S. Miller 501beb39db5SEric Dumazet /* starting over for a new packet, but check if we need to yield */ 502beb39db5SEric Dumazet cond_resched(); 5039cfaa8deSXufeng Zhang msg->msg_flags &= ~MSG_TRUNC; 504db8dac20SDavid S. Miller goto try_again; 505db8dac20SDavid S. Miller } 506db8dac20SDavid S. Miller 507db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 508d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 509645ca708SEric Dumazet struct udp_table *udptable) 510db8dac20SDavid S. Miller { 511db8dac20SDavid S. Miller struct ipv6_pinfo *np; 512b71d1d42SEric Dumazet const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; 513b71d1d42SEric Dumazet const struct in6_addr *saddr = &hdr->saddr; 514b71d1d42SEric Dumazet const struct in6_addr *daddr = &hdr->daddr; 515db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr *)(skb->data+offset); 516db8dac20SDavid S. Miller struct sock *sk; 517e0d8c1b7SWei Wang int harderr; 518db8dac20SDavid S. Miller int err; 5197304fe46SDuan Jiong struct net *net = dev_net(skb->dev); 520db8dac20SDavid S. Miller 521e32ea7e7SCraig Gallek sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source, 522538950a1SCraig Gallek inet6_iif(skb), udptable, skb); 52363159f29SIan Morris if (!sk) { 5247304fe46SDuan Jiong ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev), 5257304fe46SDuan Jiong ICMP6_MIB_INERRORS); 526db8dac20SDavid S. Miller return; 5277304fe46SDuan Jiong } 528db8dac20SDavid S. Miller 529e0d8c1b7SWei Wang harderr = icmpv6_err_convert(type, code, &err); 530e0d8c1b7SWei Wang np = inet6_sk(sk); 531e0d8c1b7SWei Wang 53293b36cf3SHannes Frederic Sowa if (type == ICMPV6_PKT_TOOBIG) { 53393b36cf3SHannes Frederic Sowa if (!ip6_sk_accept_pmtu(sk)) 53493b36cf3SHannes Frederic Sowa goto out; 53581aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info); 536e0d8c1b7SWei Wang if (np->pmtudisc != IPV6_PMTUDISC_DONT) 537e0d8c1b7SWei Wang harderr = 1; 53893b36cf3SHannes Frederic Sowa } 5391a462d18SDuan Jiong if (type == NDISC_REDIRECT) { 540ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk); 5411a462d18SDuan Jiong goto out; 5421a462d18SDuan Jiong } 54381aded24SDavid S. Miller 544e0d8c1b7SWei Wang if (!np->recverr) { 545e0d8c1b7SWei Wang if (!harderr || sk->sk_state != TCP_ESTABLISHED) 546db8dac20SDavid S. Miller goto out; 547e0d8c1b7SWei Wang } else { 548db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 549e0d8c1b7SWei Wang } 550b1faf566SEric Dumazet 551db8dac20SDavid S. Miller sk->sk_err = err; 552db8dac20SDavid S. Miller sk->sk_error_report(sk); 553db8dac20SDavid S. Miller out: 554ca065d0cSEric Dumazet return; 555db8dac20SDavid S. Miller } 556db8dac20SDavid S. Miller 557f7ad74feSBenjamin LaHaise static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 558f7ad74feSBenjamin LaHaise { 559f7ad74feSBenjamin LaHaise int rc; 560f7ad74feSBenjamin LaHaise 561efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 562f7ad74feSBenjamin LaHaise sock_rps_save_rxhash(sk, skb); 563005ec974SShawn Bohrer sk_mark_napi_id(sk, skb); 5642c8c56e1SEric Dumazet sk_incoming_cpu_update(sk); 565005ec974SShawn Bohrer } 566f7ad74feSBenjamin LaHaise 567e6afc8acSsamanthakumar rc = __sock_queue_rcv_skb(sk, skb); 568f7ad74feSBenjamin LaHaise if (rc < 0) { 569f7ad74feSBenjamin LaHaise int is_udplite = IS_UDPLITE(sk); 570f7ad74feSBenjamin LaHaise 571f7ad74feSBenjamin LaHaise /* Note that an ENOMEM error is charged twice */ 572f7ad74feSBenjamin LaHaise if (rc == -ENOMEM) 57302c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), 574f7ad74feSBenjamin LaHaise UDP_MIB_RCVBUFERRORS, is_udplite); 57502c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 576f7ad74feSBenjamin LaHaise kfree_skb(skb); 577f7ad74feSBenjamin LaHaise return -1; 578f7ad74feSBenjamin LaHaise } 579f7ad74feSBenjamin LaHaise return 0; 580f7ad74feSBenjamin LaHaise } 581f7ad74feSBenjamin LaHaise 582db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 583d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 584d5fdd6baSBrian Haley u8 code, int offset, __be32 info) 585db8dac20SDavid S. Miller { 586645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 587db8dac20SDavid S. Miller } 588db8dac20SDavid S. Miller 589d7f3f621SBenjamin LaHaise static struct static_key udpv6_encap_needed __read_mostly; 590d7f3f621SBenjamin LaHaise void udpv6_encap_enable(void) 591d7f3f621SBenjamin LaHaise { 592d7f3f621SBenjamin LaHaise if (!static_key_enabled(&udpv6_encap_needed)) 593d7f3f621SBenjamin LaHaise static_key_slow_inc(&udpv6_encap_needed); 594d7f3f621SBenjamin LaHaise } 595d7f3f621SBenjamin LaHaise EXPORT_SYMBOL(udpv6_encap_enable); 596d7f3f621SBenjamin LaHaise 597db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 598db8dac20SDavid S. Miller { 599db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 600db8dac20SDavid S. Miller int rc; 601db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 602db8dac20SDavid S. Miller 603db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 604db8dac20SDavid S. Miller goto drop; 605db8dac20SDavid S. Miller 606d7f3f621SBenjamin LaHaise if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 607d7f3f621SBenjamin LaHaise int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); 608d7f3f621SBenjamin LaHaise 609d7f3f621SBenjamin LaHaise /* 610d7f3f621SBenjamin LaHaise * This is an encapsulation socket so pass the skb to 611d7f3f621SBenjamin LaHaise * the socket's udp_encap_rcv() hook. Otherwise, just 612d7f3f621SBenjamin LaHaise * fall through and pass this up the UDP socket. 613d7f3f621SBenjamin LaHaise * up->encap_rcv() returns the following value: 614d7f3f621SBenjamin LaHaise * =0 if skb was successfully passed to the encap 615d7f3f621SBenjamin LaHaise * handler or was discarded by it. 616d7f3f621SBenjamin LaHaise * >0 if skb should be passed on to UDP. 617d7f3f621SBenjamin LaHaise * <0 if skb should be resubmitted as proto -N 618d7f3f621SBenjamin LaHaise */ 619d7f3f621SBenjamin LaHaise 620d7f3f621SBenjamin LaHaise /* if we're overly short, let UDP handle it */ 621d7f3f621SBenjamin LaHaise encap_rcv = ACCESS_ONCE(up->encap_rcv); 62253b24b8fSIan Morris if (skb->len > sizeof(struct udphdr) && encap_rcv) { 623d7f3f621SBenjamin LaHaise int ret; 624d7f3f621SBenjamin LaHaise 6250a80966bSTom Herbert /* Verify checksum before giving to encap */ 6260a80966bSTom Herbert if (udp_lib_checksum_complete(skb)) 6270a80966bSTom Herbert goto csum_error; 6280a80966bSTom Herbert 629d7f3f621SBenjamin LaHaise ret = encap_rcv(sk, skb); 630d7f3f621SBenjamin LaHaise if (ret <= 0) { 63102c22347SEric Dumazet __UDP_INC_STATS(sock_net(sk), 632d7f3f621SBenjamin LaHaise UDP_MIB_INDATAGRAMS, 633d7f3f621SBenjamin LaHaise is_udplite); 634d7f3f621SBenjamin LaHaise return -ret; 635d7f3f621SBenjamin LaHaise } 636d7f3f621SBenjamin LaHaise } 637d7f3f621SBenjamin LaHaise 638d7f3f621SBenjamin LaHaise /* FALLTHROUGH -- it's a UDP Packet */ 639d7f3f621SBenjamin LaHaise } 640d7f3f621SBenjamin LaHaise 641db8dac20SDavid S. Miller /* 642db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 643db8dac20SDavid S. Miller */ 644db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 645db8dac20SDavid S. Miller 646db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 647ba7a46f1SJoe Perches net_dbg_ratelimited("UDPLITE6: partial coverage %d while full coverage %d requested\n", 648db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 649db8dac20SDavid S. Miller goto drop; 650db8dac20SDavid S. Miller } 651db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 652ba7a46f1SJoe Perches net_dbg_ratelimited("UDPLITE6: coverage %d too small, need min %d\n", 653db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 654db8dac20SDavid S. Miller goto drop; 655db8dac20SDavid S. Miller } 656db8dac20SDavid S. Miller } 657db8dac20SDavid S. Miller 65833d480ceSEric Dumazet if (rcu_access_pointer(sk->sk_filter)) { 659db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 6606a5dc9e5SEric Dumazet goto csum_error; 661e6afc8acSsamanthakumar if (sk_filter(sk, skb)) 662e6afc8acSsamanthakumar goto drop; 663db8dac20SDavid S. Miller } 664db8dac20SDavid S. Miller 665e6afc8acSsamanthakumar udp_csum_pull_header(skb); 666274f482dSSorin Dumitru if (sk_rcvqueues_full(sk, sk->sk_rcvbuf)) { 66702c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), 6683e215c8dSJames M Leddy UDP_MIB_RCVBUFERRORS, is_udplite); 669cb80ef46SBenjamin LaHaise goto drop; 6703e215c8dSJames M Leddy } 671cb80ef46SBenjamin LaHaise 672d826eb14SEric Dumazet skb_dst_drop(skb); 673db8dac20SDavid S. Miller 674cb80ef46SBenjamin LaHaise bh_lock_sock(sk); 675cb80ef46SBenjamin LaHaise rc = 0; 676cb80ef46SBenjamin LaHaise if (!sock_owned_by_user(sk)) 677f7ad74feSBenjamin LaHaise rc = __udpv6_queue_rcv_skb(sk, skb); 678cb80ef46SBenjamin LaHaise else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { 679cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 680cb80ef46SBenjamin LaHaise goto drop; 681cb80ef46SBenjamin LaHaise } 682cb80ef46SBenjamin LaHaise bh_unlock_sock(sk); 683f7ad74feSBenjamin LaHaise 684f7ad74feSBenjamin LaHaise return rc; 6853e215c8dSJames M Leddy 6866a5dc9e5SEric Dumazet csum_error: 68702c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); 688db8dac20SDavid S. Miller drop: 68902c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 690cb80ef46SBenjamin LaHaise atomic_inc(&sk->sk_drops); 691db8dac20SDavid S. Miller kfree_skb(skb); 692db8dac20SDavid S. Miller return -1; 693db8dac20SDavid S. Miller } 694db8dac20SDavid S. Miller 6955cf3d461SDavid Held static bool __udp_v6_is_mcast_sock(struct net *net, struct sock *sk, 696b71d1d42SEric Dumazet __be16 loc_port, const struct in6_addr *loc_addr, 697b71d1d42SEric Dumazet __be16 rmt_port, const struct in6_addr *rmt_addr, 6985cf3d461SDavid Held int dif, unsigned short hnum) 699db8dac20SDavid S. Miller { 7009e89fd8bSSven Wegener struct inet_sock *inet = inet_sk(sk); 701db8dac20SDavid S. Miller 7029e89fd8bSSven Wegener if (!net_eq(sock_net(sk), net)) 7035cf3d461SDavid Held return false; 704b8ad0cbcSDaniel Lezcano 7055cf3d461SDavid Held if (udp_sk(sk)->udp_port_hash != hnum || 7065cf3d461SDavid Held sk->sk_family != PF_INET6 || 7075cf3d461SDavid Held (inet->inet_dport && inet->inet_dport != rmt_port) || 7085cf3d461SDavid Held (!ipv6_addr_any(&sk->sk_v6_daddr) && 7095cf3d461SDavid Held !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) || 71033b4b015SHenning Rogge (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) || 71133b4b015SHenning Rogge (!ipv6_addr_any(&sk->sk_v6_rcv_saddr) && 71233b4b015SHenning Rogge !ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))) 7135cf3d461SDavid Held return false; 7149e89fd8bSSven Wegener if (!inet6_mc_check(sk, loc_addr, rmt_addr)) 7155cf3d461SDavid Held return false; 7165cf3d461SDavid Held return true; 717db8dac20SDavid S. Miller } 718db8dac20SDavid S. Miller 7194068579eSTom Herbert static void udp6_csum_zero_error(struct sk_buff *skb) 7204068579eSTom Herbert { 7214068579eSTom Herbert /* RFC 2460 section 8.1 says that we SHOULD log 7224068579eSTom Herbert * this error. Well, it is reasonable. 7234068579eSTom Herbert */ 724ba7a46f1SJoe Perches net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n", 7254068579eSTom Herbert &ipv6_hdr(skb)->saddr, ntohs(udp_hdr(skb)->source), 7264068579eSTom Herbert &ipv6_hdr(skb)->daddr, ntohs(udp_hdr(skb)->dest)); 7274068579eSTom Herbert } 7284068579eSTom Herbert 729db8dac20SDavid S. Miller /* 730db8dac20SDavid S. Miller * Note: called only from the BH handler context, 731db8dac20SDavid S. Miller * so we don't need to lock the hashes. 732db8dac20SDavid S. Miller */ 733e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 734b71d1d42SEric Dumazet const struct in6_addr *saddr, const struct in6_addr *daddr, 73536cbb245SRick Jones struct udp_table *udptable, int proto) 736db8dac20SDavid S. Miller { 737ca065d0cSEric Dumazet struct sock *sk, *first = NULL; 738db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 7395cf3d461SDavid Held unsigned short hnum = ntohs(uh->dest); 7405cf3d461SDavid Held struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum); 741ca065d0cSEric Dumazet unsigned int offset = offsetof(typeof(*sk), sk_node); 7422dc41cffSDavid Held unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10); 743ca065d0cSEric Dumazet int dif = inet6_iif(skb); 744ca065d0cSEric Dumazet struct hlist_node *node; 745ca065d0cSEric Dumazet struct sk_buff *nskb; 7462dc41cffSDavid Held 7472dc41cffSDavid Held if (use_hash2) { 7482dc41cffSDavid Held hash2_any = udp6_portaddr_hash(net, &in6addr_any, hnum) & 7492dc41cffSDavid Held udp_table.mask; 7502dc41cffSDavid Held hash2 = udp6_portaddr_hash(net, daddr, hnum) & udp_table.mask; 7512dc41cffSDavid Held start_lookup: 7522dc41cffSDavid Held hslot = &udp_table.hash2[hash2]; 7532dc41cffSDavid Held offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node); 7542dc41cffSDavid Held } 755db8dac20SDavid S. Miller 756ca065d0cSEric Dumazet sk_for_each_entry_offset_rcu(sk, node, &hslot->head, offset) { 757ca065d0cSEric Dumazet if (!__udp_v6_is_mcast_sock(net, sk, uh->dest, daddr, 758ca065d0cSEric Dumazet uh->source, saddr, dif, hnum)) 759ca065d0cSEric Dumazet continue; 7601c19448cSTom Herbert /* If zero checksum and no_check is not on for 7614068579eSTom Herbert * the socket then skip it. 7624068579eSTom Herbert */ 763ca065d0cSEric Dumazet if (!uh->check && !udp_sk(sk)->no_check6_rx) 764ca065d0cSEric Dumazet continue; 765ca065d0cSEric Dumazet if (!first) { 766ca065d0cSEric Dumazet first = sk; 767ca065d0cSEric Dumazet continue; 768db8dac20SDavid S. Miller } 769ca065d0cSEric Dumazet nskb = skb_clone(skb, GFP_ATOMIC); 770ca065d0cSEric Dumazet if (unlikely(!nskb)) { 771ca065d0cSEric Dumazet atomic_inc(&sk->sk_drops); 77202c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_RCVBUFERRORS, 773ca065d0cSEric Dumazet IS_UDPLITE(sk)); 77402c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_INERRORS, 775ca065d0cSEric Dumazet IS_UDPLITE(sk)); 776ca065d0cSEric Dumazet continue; 777a1ab77f9SEric Dumazet } 778db8dac20SDavid S. Miller 779ca065d0cSEric Dumazet if (udpv6_queue_rcv_skb(sk, nskb) > 0) 780ca065d0cSEric Dumazet consume_skb(nskb); 781ca065d0cSEric Dumazet } 782a1ab77f9SEric Dumazet 7832dc41cffSDavid Held /* Also lookup *:port if we are using hash2 and haven't done so yet. */ 7842dc41cffSDavid Held if (use_hash2 && hash2 != hash2_any) { 7852dc41cffSDavid Held hash2 = hash2_any; 7862dc41cffSDavid Held goto start_lookup; 7872dc41cffSDavid Held } 7882dc41cffSDavid Held 789ca065d0cSEric Dumazet if (first) { 790ca065d0cSEric Dumazet if (udpv6_queue_rcv_skb(first, skb) > 0) 791ca065d0cSEric Dumazet consume_skb(skb); 792a1ab77f9SEric Dumazet } else { 793ca065d0cSEric Dumazet kfree_skb(skb); 79402c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_IGNOREDMULTI, 79536cbb245SRick Jones proto == IPPROTO_UDPLITE); 796a1ab77f9SEric Dumazet } 797db8dac20SDavid S. Miller return 0; 798db8dac20SDavid S. Miller } 799db8dac20SDavid S. Miller 800645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 801db8dac20SDavid S. Miller int proto) 802db8dac20SDavid S. Miller { 803b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 804ca065d0cSEric Dumazet struct net *net = dev_net(skb->dev); 805ca065d0cSEric Dumazet struct udphdr *uh; 806ca065d0cSEric Dumazet struct sock *sk; 807db8dac20SDavid S. Miller u32 ulen = 0; 808db8dac20SDavid S. Miller 809db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 810d6bc0149SBjørn Mork goto discard; 811db8dac20SDavid S. Miller 812db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 813db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 814db8dac20SDavid S. Miller uh = udp_hdr(skb); 815db8dac20SDavid S. Miller 816db8dac20SDavid S. Miller ulen = ntohs(uh->len); 817db8dac20SDavid S. Miller if (ulen > skb->len) 818db8dac20SDavid S. Miller goto short_packet; 819db8dac20SDavid S. Miller 820db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 821db8dac20SDavid S. Miller /* UDP validates ulen. */ 822db8dac20SDavid S. Miller 823db8dac20SDavid S. Miller /* Check for jumbo payload */ 824db8dac20SDavid S. Miller if (ulen == 0) 825db8dac20SDavid S. Miller ulen = skb->len; 826db8dac20SDavid S. Miller 827db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 828db8dac20SDavid S. Miller goto short_packet; 829db8dac20SDavid S. Miller 830db8dac20SDavid S. Miller if (ulen < skb->len) { 831db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 832db8dac20SDavid S. Miller goto short_packet; 833db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 834db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 835db8dac20SDavid S. Miller uh = udp_hdr(skb); 836db8dac20SDavid S. Miller } 837db8dac20SDavid S. Miller } 838db8dac20SDavid S. Miller 839db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 8406a5dc9e5SEric Dumazet goto csum_error; 841db8dac20SDavid S. Miller 842db8dac20SDavid S. Miller /* 843db8dac20SDavid S. Miller * Multicast receive code 844db8dac20SDavid S. Miller */ 845db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 846e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 84736cbb245SRick Jones saddr, daddr, udptable, proto); 848db8dac20SDavid S. Miller 849db8dac20SDavid S. Miller /* Unicast */ 850db8dac20SDavid S. Miller 851db8dac20SDavid S. Miller /* 852db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 853db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 854db8dac20SDavid S. Miller */ 855607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 85653b24b8fSIan Morris if (sk) { 857a5b50476SEliezer Tamir int ret; 858a5b50476SEliezer Tamir 8591c19448cSTom Herbert if (!uh->check && !udp_sk(sk)->no_check6_rx) { 8604068579eSTom Herbert udp6_csum_zero_error(skb); 8614068579eSTom Herbert goto csum_error; 8624068579eSTom Herbert } 8634068579eSTom Herbert 864224d019cSTom Herbert if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk)) 8652abb7cdcSTom Herbert skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check, 8662abb7cdcSTom Herbert ip6_compute_pseudo); 8672abb7cdcSTom Herbert 868a5b50476SEliezer Tamir ret = udpv6_queue_rcv_skb(sk, skb); 869db8dac20SDavid S. Miller 87059dca1d8SBill Sommerfeld /* a return value > 0 means to resubmit the input */ 871cb80ef46SBenjamin LaHaise if (ret > 0) 87259dca1d8SBill Sommerfeld return ret; 873cb80ef46SBenjamin LaHaise 874cb80ef46SBenjamin LaHaise return 0; 875cb80ef46SBenjamin LaHaise } 876cb80ef46SBenjamin LaHaise 8774068579eSTom Herbert if (!uh->check) { 8784068579eSTom Herbert udp6_csum_zero_error(skb); 8794068579eSTom Herbert goto csum_error; 8804068579eSTom Herbert } 8814068579eSTom Herbert 882db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 883db8dac20SDavid S. Miller goto discard; 884db8dac20SDavid S. Miller 885db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 8866a5dc9e5SEric Dumazet goto csum_error; 887db8dac20SDavid S. Miller 88802c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); 8893ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 890db8dac20SDavid S. Miller 891db8dac20SDavid S. Miller kfree_skb(skb); 892db8dac20SDavid S. Miller return 0; 893db8dac20SDavid S. Miller 894db8dac20SDavid S. Miller short_packet: 895ba7a46f1SJoe Perches net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 896db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 897ba7a46f1SJoe Perches saddr, ntohs(uh->source), 898ba7a46f1SJoe Perches ulen, skb->len, 899ba7a46f1SJoe Perches daddr, ntohs(uh->dest)); 9006a5dc9e5SEric Dumazet goto discard; 9016a5dc9e5SEric Dumazet csum_error: 90202c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); 903db8dac20SDavid S. Miller discard: 90402c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 905db8dac20SDavid S. Miller kfree_skb(skb); 906db8dac20SDavid S. Miller return 0; 907db8dac20SDavid S. Miller } 908db8dac20SDavid S. Miller 909db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 910db8dac20SDavid S. Miller { 911645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 912db8dac20SDavid S. Miller } 913db8dac20SDavid S. Miller 914db8dac20SDavid S. Miller /* 915db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 916db8dac20SDavid S. Miller */ 917db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 918db8dac20SDavid S. Miller { 919db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 920db8dac20SDavid S. Miller 92136d926b9SDenis V. Lunev if (up->pending == AF_INET) 92236d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 92336d926b9SDenis V. Lunev else if (up->pending) { 924db8dac20SDavid S. Miller up->len = 0; 925db8dac20SDavid S. Miller up->pending = 0; 926db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 927db8dac20SDavid S. Miller } 928db8dac20SDavid S. Miller } 929db8dac20SDavid S. Miller 930493c6be3SSridhar Samudrala /** 931493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 932493c6be3SSridhar Samudrala * @sk: socket we are sending on 933493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 934493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 935493c6be3SSridhar Samudrala */ 936493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 937493c6be3SSridhar Samudrala const struct in6_addr *saddr, 938493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 939493c6be3SSridhar Samudrala { 940493c6be3SSridhar Samudrala unsigned int offset; 941493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 942d39d938cSVlad Yasevich struct sk_buff *frags = skb_shinfo(skb)->frag_list; 943493c6be3SSridhar Samudrala __wsum csum = 0; 944493c6be3SSridhar Samudrala 945d39d938cSVlad Yasevich if (!frags) { 946493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 947493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 948493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 949493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 950493c6be3SSridhar Samudrala } else { 951493c6be3SSridhar Samudrala /* 952493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 953493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 954493c6be3SSridhar Samudrala * should be together 955493c6be3SSridhar Samudrala */ 956493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 957493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 958493c6be3SSridhar Samudrala 959493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 960493c6be3SSridhar Samudrala 961d39d938cSVlad Yasevich do { 962d39d938cSVlad Yasevich csum = csum_add(csum, frags->csum); 963d39d938cSVlad Yasevich } while ((frags = frags->next)); 964493c6be3SSridhar Samudrala 965493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 966493c6be3SSridhar Samudrala csum); 967493c6be3SSridhar Samudrala if (uh->check == 0) 968493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 969493c6be3SSridhar Samudrala } 970493c6be3SSridhar Samudrala } 971493c6be3SSridhar Samudrala 972db8dac20SDavid S. Miller /* 973db8dac20SDavid S. Miller * Sending 974db8dac20SDavid S. Miller */ 975db8dac20SDavid S. Miller 976d39d938cSVlad Yasevich static int udp_v6_send_skb(struct sk_buff *skb, struct flowi6 *fl6) 977db8dac20SDavid S. Miller { 978d39d938cSVlad Yasevich struct sock *sk = skb->sk; 979db8dac20SDavid S. Miller struct udphdr *uh; 980db8dac20SDavid S. Miller int err = 0; 981db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 982db8dac20SDavid S. Miller __wsum csum = 0; 983d39d938cSVlad Yasevich int offset = skb_transport_offset(skb); 984d39d938cSVlad Yasevich int len = skb->len - offset; 985db8dac20SDavid S. Miller 986db8dac20SDavid S. Miller /* 987db8dac20SDavid S. Miller * Create a UDP header 988db8dac20SDavid S. Miller */ 989db8dac20SDavid S. Miller uh = udp_hdr(skb); 9901958b856SDavid S. Miller uh->source = fl6->fl6_sport; 9911958b856SDavid S. Miller uh->dest = fl6->fl6_dport; 992d39d938cSVlad Yasevich uh->len = htons(len); 993db8dac20SDavid S. Miller uh->check = 0; 994db8dac20SDavid S. Miller 995db8dac20SDavid S. Miller if (is_udplite) 996d39d938cSVlad Yasevich csum = udplite_csum(skb); 997d39d938cSVlad Yasevich else if (udp_sk(sk)->no_check6_tx) { /* UDP csum disabled */ 9984068579eSTom Herbert skb->ip_summed = CHECKSUM_NONE; 9994068579eSTom Herbert goto send; 10004068579eSTom Herbert } else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 1001d39d938cSVlad Yasevich udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, len); 1002493c6be3SSridhar Samudrala goto send; 1003493c6be3SSridhar Samudrala } else 1004d39d938cSVlad Yasevich csum = udp_csum(skb); 1005db8dac20SDavid S. Miller 1006db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 10074c9483b2SDavid S. Miller uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 1008d39d938cSVlad Yasevich len, fl6->flowi6_proto, csum); 1009db8dac20SDavid S. Miller if (uh->check == 0) 1010db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 1011db8dac20SDavid S. Miller 1012493c6be3SSridhar Samudrala send: 1013d39d938cSVlad Yasevich err = ip6_send_skb(skb); 10146ce9e7b5SEric Dumazet if (err) { 10156ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 10166aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 10176ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 10186ce9e7b5SEric Dumazet err = 0; 10196ce9e7b5SEric Dumazet } 10206aef70a8SEric Dumazet } else { 10216aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 10226ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 10236aef70a8SEric Dumazet } 1024d39d938cSVlad Yasevich return err; 1025d39d938cSVlad Yasevich } 1026d39d938cSVlad Yasevich 1027d39d938cSVlad Yasevich static int udp_v6_push_pending_frames(struct sock *sk) 1028d39d938cSVlad Yasevich { 1029d39d938cSVlad Yasevich struct sk_buff *skb; 1030d39d938cSVlad Yasevich struct udp_sock *up = udp_sk(sk); 1031d39d938cSVlad Yasevich struct flowi6 fl6; 1032d39d938cSVlad Yasevich int err = 0; 1033d39d938cSVlad Yasevich 1034d39d938cSVlad Yasevich if (up->pending == AF_INET) 1035d39d938cSVlad Yasevich return udp_push_pending_frames(sk); 1036d39d938cSVlad Yasevich 1037d39d938cSVlad Yasevich /* ip6_finish_skb will release the cork, so make a copy of 1038d39d938cSVlad Yasevich * fl6 here. 1039d39d938cSVlad Yasevich */ 1040d39d938cSVlad Yasevich fl6 = inet_sk(sk)->cork.fl.u.ip6; 1041d39d938cSVlad Yasevich 1042d39d938cSVlad Yasevich skb = ip6_finish_skb(sk); 1043d39d938cSVlad Yasevich if (!skb) 1044d39d938cSVlad Yasevich goto out; 1045d39d938cSVlad Yasevich 1046d39d938cSVlad Yasevich err = udp_v6_send_skb(skb, &fl6); 1047d39d938cSVlad Yasevich 1048db8dac20SDavid S. Miller out: 1049db8dac20SDavid S. Miller up->len = 0; 1050db8dac20SDavid S. Miller up->pending = 0; 1051db8dac20SDavid S. Miller return err; 1052db8dac20SDavid S. Miller } 1053db8dac20SDavid S. Miller 10541b784140SYing Xue int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) 1055db8dac20SDavid S. Miller { 1056db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 1057db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 1058db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 1059db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 1060342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 106120c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 1062db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 106345f6fad8SEric Dumazet struct ipv6_txoptions *opt_to_free = NULL; 1064db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 10654c9483b2SDavid S. Miller struct flowi6 fl6; 1066db8dac20SDavid S. Miller struct dst_entry *dst; 1067db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 1068db8dac20SDavid S. Miller int ulen = len; 1069db8dac20SDavid S. Miller int hlimit = -1; 1070db8dac20SDavid S. Miller int tclass = -1; 107113b52cd4SBrian Haley int dontfrag = -1; 1072db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 1073db8dac20SDavid S. Miller int err; 1074db8dac20SDavid S. Miller int connected = 0; 1075db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 1076db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 1077ad1e46a8SSoheil Hassas Yeganeh struct sockcm_cookie sockc; 1078db8dac20SDavid S. Miller 1079db8dac20SDavid S. Miller /* destination address check */ 1080db8dac20SDavid S. Miller if (sin6) { 1081db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 1082db8dac20SDavid S. Miller return -EINVAL; 1083db8dac20SDavid S. Miller 1084db8dac20SDavid S. Miller switch (sin6->sin6_family) { 1085db8dac20SDavid S. Miller case AF_INET6: 1086db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 1087db8dac20SDavid S. Miller return -EINVAL; 1088db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1089db8dac20SDavid S. Miller break; 1090db8dac20SDavid S. Miller case AF_INET: 1091db8dac20SDavid S. Miller goto do_udp_sendmsg; 1092db8dac20SDavid S. Miller case AF_UNSPEC: 1093db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 1094db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 1095db8dac20SDavid S. Miller daddr = NULL; 1096db8dac20SDavid S. Miller break; 1097db8dac20SDavid S. Miller default: 1098db8dac20SDavid S. Miller return -EINVAL; 1099db8dac20SDavid S. Miller } 1100db8dac20SDavid S. Miller } else if (!up->pending) { 1101db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1102db8dac20SDavid S. Miller return -EDESTADDRREQ; 1103efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1104db8dac20SDavid S. Miller } else 1105db8dac20SDavid S. Miller daddr = NULL; 1106db8dac20SDavid S. Miller 1107db8dac20SDavid S. Miller if (daddr) { 1108db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 1109db8dac20SDavid S. Miller struct sockaddr_in sin; 1110db8dac20SDavid S. Miller sin.sin_family = AF_INET; 1111c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 1112db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1113db8dac20SDavid S. Miller msg->msg_name = &sin; 1114db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 1115db8dac20SDavid S. Miller do_udp_sendmsg: 1116db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 1117db8dac20SDavid S. Miller return -ENETUNREACH; 11181b784140SYing Xue return udp_sendmsg(sk, msg, len); 1119db8dac20SDavid S. Miller } 1120db8dac20SDavid S. Miller } 1121db8dac20SDavid S. Miller 1122db8dac20SDavid S. Miller if (up->pending == AF_INET) 11231b784140SYing Xue return udp_sendmsg(sk, msg, len); 1124db8dac20SDavid S. Miller 1125db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1126db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1127db8dac20SDavid S. Miller */ 1128db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1129db8dac20SDavid S. Miller return -EMSGSIZE; 1130db8dac20SDavid S. Miller 113103485f2aSVlad Yasevich getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1132db8dac20SDavid S. Miller if (up->pending) { 1133db8dac20SDavid S. Miller /* 1134db8dac20SDavid S. Miller * There are pending frames. 1135db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1136db8dac20SDavid S. Miller */ 1137db8dac20SDavid S. Miller lock_sock(sk); 1138db8dac20SDavid S. Miller if (likely(up->pending)) { 1139db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1140db8dac20SDavid S. Miller release_sock(sk); 1141db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1142db8dac20SDavid S. Miller } 1143db8dac20SDavid S. Miller dst = NULL; 1144db8dac20SDavid S. Miller goto do_append_data; 1145db8dac20SDavid S. Miller } 1146db8dac20SDavid S. Miller release_sock(sk); 1147db8dac20SDavid S. Miller } 1148db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1149db8dac20SDavid S. Miller 11504c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 1151db8dac20SDavid S. Miller 1152db8dac20SDavid S. Miller if (sin6) { 1153db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1154db8dac20SDavid S. Miller return -EINVAL; 1155db8dac20SDavid S. Miller 11561958b856SDavid S. Miller fl6.fl6_dport = sin6->sin6_port; 1157db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1158db8dac20SDavid S. Miller 1159db8dac20SDavid S. Miller if (np->sndflow) { 11604c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 11614c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 11624c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 116363159f29SIan Morris if (!flowlabel) 1164db8dac20SDavid S. Miller return -EINVAL; 1165db8dac20SDavid S. Miller } 1166db8dac20SDavid S. Miller } 1167db8dac20SDavid S. Miller 1168db8dac20SDavid S. Miller /* 1169db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1170db8dac20SDavid S. Miller * sk->sk_dst_cache. 1171db8dac20SDavid S. Miller */ 1172db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1173efe4208fSEric Dumazet ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) 1174efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1175db8dac20SDavid S. Miller 1176db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1177db8dac20SDavid S. Miller sin6->sin6_scope_id && 1178842df073SHannes Frederic Sowa __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) 11794c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 1180db8dac20SDavid S. Miller } else { 1181db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1182db8dac20SDavid S. Miller return -EDESTADDRREQ; 1183db8dac20SDavid S. Miller 11841958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 1185efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 11864c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 1187db8dac20SDavid S. Miller connected = 1; 1188db8dac20SDavid S. Miller } 1189db8dac20SDavid S. Miller 11904c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11914c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 1192db8dac20SDavid S. Miller 11934c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 11944c9483b2SDavid S. Miller fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 11959f690db7SYang Hongyang 11964c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 1197c14ac945SSoheil Hassas Yeganeh sockc.tsflags = sk->sk_tsflags; 119851953d5bSBrian Haley 1199db8dac20SDavid S. Miller if (msg->msg_controllen) { 1200db8dac20SDavid S. Miller opt = &opt_space; 1201db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1202db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 1203db8dac20SDavid S. Miller 120473df66f8STom Parkin err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, 1205ad1e46a8SSoheil Hassas Yeganeh &hlimit, &tclass, &dontfrag, 1206ad1e46a8SSoheil Hassas Yeganeh &sockc); 1207db8dac20SDavid S. Miller if (err < 0) { 1208db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1209db8dac20SDavid S. Miller return err; 1210db8dac20SDavid S. Miller } 12114c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 12124c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 121363159f29SIan Morris if (!flowlabel) 1214db8dac20SDavid S. Miller return -EINVAL; 1215db8dac20SDavid S. Miller } 1216db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1217db8dac20SDavid S. Miller opt = NULL; 1218db8dac20SDavid S. Miller connected = 0; 1219db8dac20SDavid S. Miller } 122045f6fad8SEric Dumazet if (!opt) { 122145f6fad8SEric Dumazet opt = txopt_get(np); 122245f6fad8SEric Dumazet opt_to_free = opt; 122345f6fad8SEric Dumazet } 1224db8dac20SDavid S. Miller if (flowlabel) 1225db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1226db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 1227db8dac20SDavid S. Miller 12284c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 1229876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 12304e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr; 1231876c7f41SBrian Haley else 12324c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 12334c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 12344e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 12351958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 1236db8dac20SDavid S. Miller 12374c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 123820c59de2SArnaud Ebalard if (final_p) 1239db8dac20SDavid S. Miller connected = 0; 1240db8dac20SDavid S. Miller 12414c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { 12424c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 1243db8dac20SDavid S. Miller connected = 0; 1244c4062dfcSErich E. Hoover } else if (!fl6.flowi6_oif) 1245c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif; 1246db8dac20SDavid S. Miller 12474c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 1248db8dac20SDavid S. Miller 12490e0d44abSSteffen Klassert dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p); 125068d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 125168d0c6d3SDavid S. Miller err = PTR_ERR(dst); 125268d0c6d3SDavid S. Miller dst = NULL; 1253db8dac20SDavid S. Miller goto out; 1254db8dac20SDavid S. Miller } 1255db8dac20SDavid S. Miller 1256db8dac20SDavid S. Miller if (hlimit < 0) 12575c98631cSLorenzo Colitti hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); 1258db8dac20SDavid S. Miller 1259db8dac20SDavid S. Miller if (tclass < 0) 1260e651f03aSGerrit Renker tclass = np->tclass; 1261db8dac20SDavid S. Miller 1262db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1263db8dac20SDavid S. Miller goto do_confirm; 1264db8dac20SDavid S. Miller back_from_confirm: 1265db8dac20SDavid S. Miller 126603485f2aSVlad Yasevich /* Lockless fast path for the non-corking case */ 126703485f2aSVlad Yasevich if (!corkreq) { 126803485f2aSVlad Yasevich struct sk_buff *skb; 126903485f2aSVlad Yasevich 127003485f2aSVlad Yasevich skb = ip6_make_skb(sk, getfrag, msg, ulen, 127103485f2aSVlad Yasevich sizeof(struct udphdr), hlimit, tclass, opt, 127203485f2aSVlad Yasevich &fl6, (struct rt6_info *)dst, 1273c14ac945SSoheil Hassas Yeganeh msg->msg_flags, dontfrag, &sockc); 127403485f2aSVlad Yasevich err = PTR_ERR(skb); 127503485f2aSVlad Yasevich if (!IS_ERR_OR_NULL(skb)) 127603485f2aSVlad Yasevich err = udp_v6_send_skb(skb, &fl6); 127703485f2aSVlad Yasevich goto release_dst; 127803485f2aSVlad Yasevich } 127903485f2aSVlad Yasevich 1280db8dac20SDavid S. Miller lock_sock(sk); 1281db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1282db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1283db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1284db8dac20SDavid S. Miller release_sock(sk); 1285db8dac20SDavid S. Miller 1286ba7a46f1SJoe Perches net_dbg_ratelimited("udp cork app bug 2\n"); 1287db8dac20SDavid S. Miller err = -EINVAL; 1288db8dac20SDavid S. Miller goto out; 1289db8dac20SDavid S. Miller } 1290db8dac20SDavid S. Miller 1291db8dac20SDavid S. Miller up->pending = AF_INET6; 1292db8dac20SDavid S. Miller 1293db8dac20SDavid S. Miller do_append_data: 1294e36d3ff9SJiri Pirko if (dontfrag < 0) 1295e36d3ff9SJiri Pirko dontfrag = np->dontfrag; 1296db8dac20SDavid S. Miller up->len += ulen; 1297f69e6d13SAl Viro err = ip6_append_data(sk, getfrag, msg, ulen, 12984c9483b2SDavid S. Miller sizeof(struct udphdr), hlimit, tclass, opt, &fl6, 1299db8dac20SDavid S. Miller (struct rt6_info *)dst, 1300c14ac945SSoheil Hassas Yeganeh corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag, 1301c14ac945SSoheil Hassas Yeganeh &sockc); 1302db8dac20SDavid S. Miller if (err) 1303db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1304db8dac20SDavid S. Miller else if (!corkreq) 1305db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1306db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1307db8dac20SDavid S. Miller up->pending = 0; 1308db8dac20SDavid S. Miller 130903485f2aSVlad Yasevich if (err > 0) 131003485f2aSVlad Yasevich err = np->recverr ? net_xmit_errno(err) : 0; 131103485f2aSVlad Yasevich release_sock(sk); 131203485f2aSVlad Yasevich 131303485f2aSVlad Yasevich release_dst: 1314db8dac20SDavid S. Miller if (dst) { 1315db8dac20SDavid S. Miller if (connected) { 1316db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 1317efe4208fSEric Dumazet ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? 1318efe4208fSEric Dumazet &sk->sk_v6_daddr : NULL, 1319db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 13204c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1321db8dac20SDavid S. Miller &np->saddr : 1322db8dac20SDavid S. Miller #endif 1323db8dac20SDavid S. Miller NULL); 1324db8dac20SDavid S. Miller } else { 1325db8dac20SDavid S. Miller dst_release(dst); 1326db8dac20SDavid S. Miller } 1327a3c96089SYOSHIFUJI Hideaki dst = NULL; 1328db8dac20SDavid S. Miller } 1329db8dac20SDavid S. Miller 1330db8dac20SDavid S. Miller out: 1331a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1332db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 133345f6fad8SEric Dumazet txopt_put(opt_to_free); 1334db8dac20SDavid S. Miller if (!err) 1335db8dac20SDavid S. Miller return len; 1336db8dac20SDavid S. Miller /* 1337db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1338db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1339db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1340db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1341db8dac20SDavid S. Miller * seems like overkill. 1342db8dac20SDavid S. Miller */ 1343db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 13446aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 1345235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1346db8dac20SDavid S. Miller } 1347db8dac20SDavid S. Miller return err; 1348db8dac20SDavid S. Miller 1349db8dac20SDavid S. Miller do_confirm: 1350db8dac20SDavid S. Miller dst_confirm(dst); 1351db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1352db8dac20SDavid S. Miller goto back_from_confirm; 1353db8dac20SDavid S. Miller err = 0; 1354db8dac20SDavid S. Miller goto out; 1355db8dac20SDavid S. Miller } 1356db8dac20SDavid S. Miller 13577d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1358db8dac20SDavid S. Miller { 135944046a59STom Parkin struct udp_sock *up = udp_sk(sk); 1360db8dac20SDavid S. Miller lock_sock(sk); 1361db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1362db8dac20SDavid S. Miller release_sock(sk); 1363db8dac20SDavid S. Miller 136444046a59STom Parkin if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 136544046a59STom Parkin void (*encap_destroy)(struct sock *sk); 136644046a59STom Parkin encap_destroy = ACCESS_ONCE(up->encap_destroy); 136744046a59STom Parkin if (encap_destroy) 136844046a59STom Parkin encap_destroy(sk); 136944046a59STom Parkin } 137044046a59STom Parkin 1371db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1372db8dac20SDavid S. Miller } 1373db8dac20SDavid S. Miller 1374db8dac20SDavid S. Miller /* 1375db8dac20SDavid S. Miller * Socket option code for UDP 1376db8dac20SDavid S. Miller */ 1377db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1378b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1379db8dac20SDavid S. Miller { 1380db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1381db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1382db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1383db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1384db8dac20SDavid S. Miller } 1385db8dac20SDavid S. Miller 1386db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1387db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1388b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1389db8dac20SDavid S. Miller { 1390db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1391db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1392db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1393db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1394db8dac20SDavid S. Miller } 1395db8dac20SDavid S. Miller #endif 1396db8dac20SDavid S. Miller 1397db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1398db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1399db8dac20SDavid S. Miller { 1400db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1401db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1402db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1403db8dac20SDavid S. Miller } 1404db8dac20SDavid S. Miller 1405db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1406db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1407db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1408db8dac20SDavid S. Miller { 1409db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1410db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1411db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1412db8dac20SDavid S. Miller } 1413db8dac20SDavid S. Miller #endif 1414db8dac20SDavid S. Miller 141541135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1416db8dac20SDavid S. Miller .handler = udpv6_rcv, 1417db8dac20SDavid S. Miller .err_handler = udpv6_err, 1418db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1419db8dac20SDavid S. Miller }; 1420db8dac20SDavid S. Miller 1421db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1422db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1423db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1424db8dac20SDavid S. Miller { 142517ef66afSLorenzo Colitti if (v == SEQ_START_TOKEN) { 142617ef66afSLorenzo Colitti seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); 142717ef66afSLorenzo Colitti } else { 142817ef66afSLorenzo Colitti int bucket = ((struct udp_iter_state *)seq->private)->bucket; 142917ef66afSLorenzo Colitti struct inet_sock *inet = inet_sk(v); 143017ef66afSLorenzo Colitti __u16 srcp = ntohs(inet->inet_sport); 143117ef66afSLorenzo Colitti __u16 destp = ntohs(inet->inet_dport); 143217ef66afSLorenzo Colitti ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); 143317ef66afSLorenzo Colitti } 1434db8dac20SDavid S. Miller return 0; 1435db8dac20SDavid S. Miller } 1436db8dac20SDavid S. Miller 143773cb88ecSArjan van de Ven static const struct file_operations udp6_afinfo_seq_fops = { 143873cb88ecSArjan van de Ven .owner = THIS_MODULE, 143973cb88ecSArjan van de Ven .open = udp_seq_open, 144073cb88ecSArjan van de Ven .read = seq_read, 144173cb88ecSArjan van de Ven .llseek = seq_lseek, 144273cb88ecSArjan van de Ven .release = seq_release_net 144373cb88ecSArjan van de Ven }; 144473cb88ecSArjan van de Ven 1445db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1446db8dac20SDavid S. Miller .name = "udp6", 1447db8dac20SDavid S. Miller .family = AF_INET6, 1448645ca708SEric Dumazet .udp_table = &udp_table, 144973cb88ecSArjan van de Ven .seq_fops = &udp6_afinfo_seq_fops, 1450dda61925SDenis V. Lunev .seq_ops = { 1451dda61925SDenis V. Lunev .show = udp6_seq_show, 1452dda61925SDenis V. Lunev }, 1453db8dac20SDavid S. Miller }; 1454db8dac20SDavid S. Miller 14552c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1456db8dac20SDavid S. Miller { 14570c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1458db8dac20SDavid S. Miller } 1459db8dac20SDavid S. Miller 1460ec120da6SIan Morris void udp6_proc_exit(struct net *net) 1461ec120da6SIan Morris { 14620c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1463db8dac20SDavid S. Miller } 1464db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1465db8dac20SDavid S. Miller 1466f77d6021SEric Dumazet void udp_v6_clear_sk(struct sock *sk, int size) 1467f77d6021SEric Dumazet { 1468f77d6021SEric Dumazet struct inet_sock *inet = inet_sk(sk); 1469f77d6021SEric Dumazet 1470f77d6021SEric Dumazet /* we do not want to clear pinet6 field, because of RCU lookups */ 1471f77d6021SEric Dumazet sk_prot_clear_portaddr_nulls(sk, offsetof(struct inet_sock, pinet6)); 1472f77d6021SEric Dumazet 1473f77d6021SEric Dumazet size -= offsetof(struct inet_sock, pinet6) + sizeof(inet->pinet6); 1474f77d6021SEric Dumazet memset(&inet->pinet6 + 1, 0, size); 1475f77d6021SEric Dumazet } 1476f77d6021SEric Dumazet 1477db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1478db8dac20SDavid S. Miller 1479db8dac20SDavid S. Miller struct proto udpv6_prot = { 1480db8dac20SDavid S. Miller .name = "UDPv6", 1481db8dac20SDavid S. Miller .owner = THIS_MODULE, 1482db8dac20SDavid S. Miller .close = udp_lib_close, 1483db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1484db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1485db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1486db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1487db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1488db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1489db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1490db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1491f7ad74feSBenjamin LaHaise .backlog_rcv = __udpv6_queue_rcv_skb, 1492e646b657SMartin KaFai Lau .release_cb = ip6_datagram_release_cb, 1493db8dac20SDavid S. Miller .hash = udp_lib_hash, 1494db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1495719f8358SEric Dumazet .rehash = udp_v6_rehash, 1496db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1497db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1498db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1499db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1500db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1501db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1502271b72c7SEric Dumazet .slab_flags = SLAB_DESTROY_BY_RCU, 1503645ca708SEric Dumazet .h.udp_table = &udp_table, 1504db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1505db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1506db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1507db8dac20SDavid S. Miller #endif 1508f77d6021SEric Dumazet .clear_sk = udp_v6_clear_sk, 1509db8dac20SDavid S. Miller }; 1510db8dac20SDavid S. Miller 1511db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1512db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1513db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1514db8dac20SDavid S. Miller .prot = &udpv6_prot, 1515db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1516db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1517db8dac20SDavid S. Miller }; 1518db8dac20SDavid S. Miller 1519db8dac20SDavid S. Miller int __init udpv6_init(void) 1520db8dac20SDavid S. Miller { 1521db8dac20SDavid S. Miller int ret; 1522db8dac20SDavid S. Miller 15233336288aSVlad Yasevich ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 15243336288aSVlad Yasevich if (ret) 1525c6b641a4SVlad Yasevich goto out; 15263336288aSVlad Yasevich 1527db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1528db8dac20SDavid S. Miller if (ret) 1529db8dac20SDavid S. Miller goto out_udpv6_protocol; 1530db8dac20SDavid S. Miller out: 1531db8dac20SDavid S. Miller return ret; 1532db8dac20SDavid S. Miller 1533db8dac20SDavid S. Miller out_udpv6_protocol: 1534db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1535db8dac20SDavid S. Miller goto out; 1536db8dac20SDavid S. Miller } 1537db8dac20SDavid S. Miller 1538db8dac20SDavid S. Miller void udpv6_exit(void) 1539db8dac20SDavid S. Miller { 1540db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1541db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1542db8dac20SDavid S. Miller } 1543