1db8dac20SDavid S. Miller /* 2db8dac20SDavid S. Miller * UDP over IPv6 3db8dac20SDavid S. Miller * Linux INET6 implementation 4db8dac20SDavid S. Miller * 5db8dac20SDavid S. Miller * Authors: 6db8dac20SDavid S. Miller * Pedro Roque <roque@di.fc.ul.pt> 7db8dac20SDavid S. Miller * 8db8dac20SDavid S. Miller * Based on linux/ipv4/udp.c 9db8dac20SDavid S. Miller * 10db8dac20SDavid S. Miller * Fixes: 11db8dac20SDavid S. Miller * Hideaki YOSHIFUJI : sin6_scope_id support 12db8dac20SDavid S. Miller * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which 13db8dac20SDavid S. Miller * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind 14db8dac20SDavid S. Miller * a single port at the same time. 15db8dac20SDavid S. Miller * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data 16db8dac20SDavid S. Miller * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. 17db8dac20SDavid S. Miller * 18db8dac20SDavid S. Miller * This program is free software; you can redistribute it and/or 19db8dac20SDavid S. Miller * modify it under the terms of the GNU General Public License 20db8dac20SDavid S. Miller * as published by the Free Software Foundation; either version 21db8dac20SDavid S. Miller * 2 of the License, or (at your option) any later version. 22db8dac20SDavid S. Miller */ 23db8dac20SDavid S. Miller 24db8dac20SDavid S. Miller #include <linux/errno.h> 25db8dac20SDavid S. Miller #include <linux/types.h> 26db8dac20SDavid S. Miller #include <linux/socket.h> 27db8dac20SDavid S. Miller #include <linux/sockios.h> 28db8dac20SDavid S. Miller #include <linux/net.h> 29db8dac20SDavid S. Miller #include <linux/in6.h> 30db8dac20SDavid S. Miller #include <linux/netdevice.h> 31db8dac20SDavid S. Miller #include <linux/if_arp.h> 32db8dac20SDavid S. Miller #include <linux/ipv6.h> 33db8dac20SDavid S. Miller #include <linux/icmpv6.h> 34db8dac20SDavid S. Miller #include <linux/init.h> 35db8dac20SDavid S. Miller #include <linux/module.h> 36db8dac20SDavid S. Miller #include <linux/skbuff.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 38db8dac20SDavid S. Miller #include <asm/uaccess.h> 39db8dac20SDavid S. Miller 40db8dac20SDavid S. Miller #include <net/ndisc.h> 41db8dac20SDavid S. Miller #include <net/protocol.h> 42db8dac20SDavid S. Miller #include <net/transp_v6.h> 43db8dac20SDavid S. Miller #include <net/ip6_route.h> 44db8dac20SDavid S. Miller #include <net/raw.h> 45db8dac20SDavid S. Miller #include <net/tcp_states.h> 46db8dac20SDavid S. Miller #include <net/ip6_checksum.h> 47db8dac20SDavid S. Miller #include <net/xfrm.h> 48db8dac20SDavid S. Miller 49db8dac20SDavid S. Miller #include <linux/proc_fs.h> 50db8dac20SDavid S. Miller #include <linux/seq_file.h> 51db8dac20SDavid S. Miller #include "udp_impl.h" 52db8dac20SDavid S. Miller 53b2f5e7cdSVlad Yasevich int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) 54b2f5e7cdSVlad Yasevich { 55b2f5e7cdSVlad Yasevich const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; 56b2f5e7cdSVlad Yasevich const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); 57c720c7e8SEric Dumazet __be32 sk1_rcv_saddr = inet_sk(sk)->inet_rcv_saddr; 58499923c7SVlad Yasevich __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); 59b2f5e7cdSVlad Yasevich int sk_ipv6only = ipv6_only_sock(sk); 60b2f5e7cdSVlad Yasevich int sk2_ipv6only = inet_v6_ipv6only(sk2); 61b2f5e7cdSVlad Yasevich int addr_type = ipv6_addr_type(sk_rcv_saddr6); 62b2f5e7cdSVlad Yasevich int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; 63b2f5e7cdSVlad Yasevich 64b2f5e7cdSVlad Yasevich /* if both are mapped, treat as IPv4 */ 65b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) 66499923c7SVlad Yasevich return (!sk2_ipv6only && 67c720c7e8SEric Dumazet (!sk1_rcv_saddr || !sk2_rcv_saddr || 68c720c7e8SEric Dumazet sk1_rcv_saddr == sk2_rcv_saddr)); 69b2f5e7cdSVlad Yasevich 70b2f5e7cdSVlad Yasevich if (addr_type2 == IPV6_ADDR_ANY && 71b2f5e7cdSVlad Yasevich !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) 72b2f5e7cdSVlad Yasevich return 1; 73b2f5e7cdSVlad Yasevich 74b2f5e7cdSVlad Yasevich if (addr_type == IPV6_ADDR_ANY && 75b2f5e7cdSVlad Yasevich !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) 76b2f5e7cdSVlad Yasevich return 1; 77b2f5e7cdSVlad Yasevich 78b2f5e7cdSVlad Yasevich if (sk2_rcv_saddr6 && 79b2f5e7cdSVlad Yasevich ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) 80b2f5e7cdSVlad Yasevich return 1; 81b2f5e7cdSVlad Yasevich 82b2f5e7cdSVlad Yasevich return 0; 83b2f5e7cdSVlad Yasevich } 84b2f5e7cdSVlad Yasevich 85d4cada4aSEric Dumazet static unsigned int udp6_portaddr_hash(struct net *net, 86d4cada4aSEric Dumazet const struct in6_addr *addr6, 87d4cada4aSEric Dumazet unsigned int port) 88d4cada4aSEric Dumazet { 89d4cada4aSEric Dumazet unsigned int hash, mix = net_hash_mix(net); 90d4cada4aSEric Dumazet 91d4cada4aSEric Dumazet if (ipv6_addr_any(addr6)) 92d4cada4aSEric Dumazet hash = jhash_1word(0, mix); 93856540eeSBrian Haley else if (ipv6_addr_v4mapped(addr6)) 940eae88f3SEric Dumazet hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); 95d4cada4aSEric Dumazet else 960eae88f3SEric Dumazet hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); 97d4cada4aSEric Dumazet 98d4cada4aSEric Dumazet return hash ^ port; 99d4cada4aSEric Dumazet } 100d4cada4aSEric Dumazet 101d4cada4aSEric Dumazet 1026ba5a3c5SPavel Emelyanov int udp_v6_get_port(struct sock *sk, unsigned short snum) 103db8dac20SDavid S. Miller { 10430fff923SEric Dumazet unsigned int hash2_nulladdr = 10530fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); 10630fff923SEric Dumazet unsigned int hash2_partial = 10730fff923SEric Dumazet udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0); 10830fff923SEric Dumazet 109d4cada4aSEric Dumazet /* precompute partial secondary hash */ 11030fff923SEric Dumazet udp_sk(sk)->udp_portaddr_hash = hash2_partial; 11130fff923SEric Dumazet return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); 112db8dac20SDavid S. Miller } 113db8dac20SDavid S. Miller 114645ca708SEric Dumazet static inline int compute_score(struct sock *sk, struct net *net, 115645ca708SEric Dumazet unsigned short hnum, 116db8dac20SDavid S. Miller struct in6_addr *saddr, __be16 sport, 117db8dac20SDavid S. Miller struct in6_addr *daddr, __be16 dport, 118645ca708SEric Dumazet int dif) 119db8dac20SDavid S. Miller { 120645ca708SEric Dumazet int score = -1; 121db8dac20SDavid S. Miller 122d4cada4aSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 123db8dac20SDavid S. Miller sk->sk_family == PF_INET6) { 124db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 125645ca708SEric Dumazet struct inet_sock *inet = inet_sk(sk); 126645ca708SEric Dumazet 127645ca708SEric Dumazet score = 0; 128c720c7e8SEric Dumazet if (inet->inet_dport) { 129c720c7e8SEric Dumazet if (inet->inet_dport != sport) 130645ca708SEric Dumazet return -1; 131db8dac20SDavid S. Miller score++; 132db8dac20SDavid S. Miller } 133db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 134db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) 135645ca708SEric Dumazet return -1; 136db8dac20SDavid S. Miller score++; 137db8dac20SDavid S. Miller } 138db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr)) { 139db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->daddr, saddr)) 140645ca708SEric Dumazet return -1; 141db8dac20SDavid S. Miller score++; 142db8dac20SDavid S. Miller } 143db8dac20SDavid S. Miller if (sk->sk_bound_dev_if) { 144db8dac20SDavid S. Miller if (sk->sk_bound_dev_if != dif) 145645ca708SEric Dumazet return -1; 146db8dac20SDavid S. Miller score++; 147db8dac20SDavid S. Miller } 148645ca708SEric Dumazet } 149645ca708SEric Dumazet return score; 150645ca708SEric Dumazet } 151645ca708SEric Dumazet 152fddc17deSEric Dumazet #define SCORE2_MAX (1 + 1 + 1) 153fddc17deSEric Dumazet static inline int compute_score2(struct sock *sk, struct net *net, 154fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 155fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned short hnum, 156fddc17deSEric Dumazet int dif) 157fddc17deSEric Dumazet { 158fddc17deSEric Dumazet int score = -1; 159fddc17deSEric Dumazet 160fddc17deSEric Dumazet if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && 161fddc17deSEric Dumazet sk->sk_family == PF_INET6) { 162fddc17deSEric Dumazet struct ipv6_pinfo *np = inet6_sk(sk); 163fddc17deSEric Dumazet struct inet_sock *inet = inet_sk(sk); 164fddc17deSEric Dumazet 165fddc17deSEric Dumazet if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) 166fddc17deSEric Dumazet return -1; 167fddc17deSEric Dumazet score = 0; 168fddc17deSEric Dumazet if (inet->inet_dport) { 169fddc17deSEric Dumazet if (inet->inet_dport != sport) 170fddc17deSEric Dumazet return -1; 171fddc17deSEric Dumazet score++; 172fddc17deSEric Dumazet } 173fddc17deSEric Dumazet if (!ipv6_addr_any(&np->daddr)) { 174fddc17deSEric Dumazet if (!ipv6_addr_equal(&np->daddr, saddr)) 175fddc17deSEric Dumazet return -1; 176fddc17deSEric Dumazet score++; 177fddc17deSEric Dumazet } 178fddc17deSEric Dumazet if (sk->sk_bound_dev_if) { 179fddc17deSEric Dumazet if (sk->sk_bound_dev_if != dif) 180fddc17deSEric Dumazet return -1; 181fddc17deSEric Dumazet score++; 182fddc17deSEric Dumazet } 183fddc17deSEric Dumazet } 184fddc17deSEric Dumazet return score; 185fddc17deSEric Dumazet } 186fddc17deSEric Dumazet 187fddc17deSEric Dumazet 188fddc17deSEric Dumazet /* called with read_rcu_lock() */ 189fddc17deSEric Dumazet static struct sock *udp6_lib_lookup2(struct net *net, 190fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 191fddc17deSEric Dumazet const struct in6_addr *daddr, unsigned int hnum, int dif, 192fddc17deSEric Dumazet struct udp_hslot *hslot2, unsigned int slot2) 193fddc17deSEric Dumazet { 194fddc17deSEric Dumazet struct sock *sk, *result; 195fddc17deSEric Dumazet struct hlist_nulls_node *node; 196fddc17deSEric Dumazet int score, badness; 197fddc17deSEric Dumazet 198fddc17deSEric Dumazet begin: 199fddc17deSEric Dumazet result = NULL; 200fddc17deSEric Dumazet badness = -1; 201fddc17deSEric Dumazet udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { 202fddc17deSEric Dumazet score = compute_score2(sk, net, saddr, sport, 203fddc17deSEric Dumazet daddr, hnum, dif); 204fddc17deSEric Dumazet if (score > badness) { 205fddc17deSEric Dumazet result = sk; 206fddc17deSEric Dumazet badness = score; 207fddc17deSEric Dumazet if (score == SCORE2_MAX) 208fddc17deSEric Dumazet goto exact_match; 209fddc17deSEric Dumazet } 210fddc17deSEric Dumazet } 211fddc17deSEric Dumazet /* 212fddc17deSEric Dumazet * if the nulls value we got at the end of this lookup is 213fddc17deSEric Dumazet * not the expected one, we must restart lookup. 214fddc17deSEric Dumazet * We probably met an item that was moved to another chain. 215fddc17deSEric Dumazet */ 216fddc17deSEric Dumazet if (get_nulls_value(node) != slot2) 217fddc17deSEric Dumazet goto begin; 218fddc17deSEric Dumazet 219fddc17deSEric Dumazet if (result) { 220fddc17deSEric Dumazet exact_match: 221fddc17deSEric Dumazet if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) 222fddc17deSEric Dumazet result = NULL; 223fddc17deSEric Dumazet else if (unlikely(compute_score2(result, net, saddr, sport, 224fddc17deSEric Dumazet daddr, hnum, dif) < badness)) { 225fddc17deSEric Dumazet sock_put(result); 226fddc17deSEric Dumazet goto begin; 227fddc17deSEric Dumazet } 228fddc17deSEric Dumazet } 229fddc17deSEric Dumazet return result; 230fddc17deSEric Dumazet } 231fddc17deSEric Dumazet 232645ca708SEric Dumazet static struct sock *__udp6_lib_lookup(struct net *net, 233645ca708SEric Dumazet struct in6_addr *saddr, __be16 sport, 234645ca708SEric Dumazet struct in6_addr *daddr, __be16 dport, 235645ca708SEric Dumazet int dif, struct udp_table *udptable) 236645ca708SEric Dumazet { 237271b72c7SEric Dumazet struct sock *sk, *result; 23888ab1932SEric Dumazet struct hlist_nulls_node *node; 239645ca708SEric Dumazet unsigned short hnum = ntohs(dport); 240fddc17deSEric Dumazet unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); 241fddc17deSEric Dumazet struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; 242271b72c7SEric Dumazet int score, badness; 243645ca708SEric Dumazet 244271b72c7SEric Dumazet rcu_read_lock(); 245fddc17deSEric Dumazet if (hslot->count > 10) { 246fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, daddr, hnum); 247fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 248fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 249fddc17deSEric Dumazet if (hslot->count < hslot2->count) 250fddc17deSEric Dumazet goto begin; 251fddc17deSEric Dumazet 252fddc17deSEric Dumazet result = udp6_lib_lookup2(net, saddr, sport, 253fddc17deSEric Dumazet daddr, hnum, dif, 254fddc17deSEric Dumazet hslot2, slot2); 255fddc17deSEric Dumazet if (!result) { 256fddc17deSEric Dumazet hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); 257fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 258fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 259fddc17deSEric Dumazet if (hslot->count < hslot2->count) 260fddc17deSEric Dumazet goto begin; 261fddc17deSEric Dumazet 2621223c67cSJorge Boncompte [DTI2] result = udp6_lib_lookup2(net, saddr, sport, 2631223c67cSJorge Boncompte [DTI2] &in6addr_any, hnum, dif, 264fddc17deSEric Dumazet hslot2, slot2); 265fddc17deSEric Dumazet } 266fddc17deSEric Dumazet rcu_read_unlock(); 267fddc17deSEric Dumazet return result; 268fddc17deSEric Dumazet } 269271b72c7SEric Dumazet begin: 270271b72c7SEric Dumazet result = NULL; 271271b72c7SEric Dumazet badness = -1; 27288ab1932SEric Dumazet sk_nulls_for_each_rcu(sk, node, &hslot->head) { 273645ca708SEric Dumazet score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); 274645ca708SEric Dumazet if (score > badness) { 275db8dac20SDavid S. Miller result = sk; 276db8dac20SDavid S. Miller badness = score; 277db8dac20SDavid S. Miller } 278db8dac20SDavid S. Miller } 27988ab1932SEric Dumazet /* 28088ab1932SEric Dumazet * if the nulls value we got at the end of this lookup is 28188ab1932SEric Dumazet * not the expected one, we must restart lookup. 28288ab1932SEric Dumazet * We probably met an item that was moved to another chain. 28388ab1932SEric Dumazet */ 284fddc17deSEric Dumazet if (get_nulls_value(node) != slot) 28588ab1932SEric Dumazet goto begin; 28688ab1932SEric Dumazet 287271b72c7SEric Dumazet if (result) { 288271b72c7SEric Dumazet if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) 289271b72c7SEric Dumazet result = NULL; 290271b72c7SEric Dumazet else if (unlikely(compute_score(result, net, hnum, saddr, sport, 291271b72c7SEric Dumazet daddr, dport, dif) < badness)) { 292271b72c7SEric Dumazet sock_put(result); 293271b72c7SEric Dumazet goto begin; 294271b72c7SEric Dumazet } 295271b72c7SEric Dumazet } 296271b72c7SEric Dumazet rcu_read_unlock(); 297db8dac20SDavid S. Miller return result; 298db8dac20SDavid S. Miller } 299db8dac20SDavid S. Miller 300607c4aafSKOVACS Krisztian static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, 301607c4aafSKOVACS Krisztian __be16 sport, __be16 dport, 302645ca708SEric Dumazet struct udp_table *udptable) 303607c4aafSKOVACS Krisztian { 30423542618SKOVACS Krisztian struct sock *sk; 305607c4aafSKOVACS Krisztian struct ipv6hdr *iph = ipv6_hdr(skb); 306607c4aafSKOVACS Krisztian 30723542618SKOVACS Krisztian if (unlikely(sk = skb_steal_sock(skb))) 30823542618SKOVACS Krisztian return sk; 309adf30907SEric Dumazet return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, 310607c4aafSKOVACS Krisztian &iph->daddr, dport, inet6_iif(skb), 311607c4aafSKOVACS Krisztian udptable); 312607c4aafSKOVACS Krisztian } 313607c4aafSKOVACS Krisztian 314db8dac20SDavid S. Miller /* 315db8dac20SDavid S. Miller * This should be easy, if there is something there we 316db8dac20SDavid S. Miller * return it, otherwise we block. 317db8dac20SDavid S. Miller */ 318db8dac20SDavid S. Miller 319db8dac20SDavid S. Miller int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, 320db8dac20SDavid S. Miller struct msghdr *msg, size_t len, 321db8dac20SDavid S. Miller int noblock, int flags, int *addr_len) 322db8dac20SDavid S. Miller { 323db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 324db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 325db8dac20SDavid S. Miller struct sk_buff *skb; 32681d54ec8SGerrit Renker unsigned int ulen; 327db8dac20SDavid S. Miller int peeked; 328db8dac20SDavid S. Miller int err; 329db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 330f26ba175SWei Yongjun int is_udp4; 331db8dac20SDavid S. Miller 332db8dac20SDavid S. Miller if (addr_len) 333db8dac20SDavid S. Miller *addr_len=sizeof(struct sockaddr_in6); 334db8dac20SDavid S. Miller 335db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 336db8dac20SDavid S. Miller return ipv6_recv_error(sk, msg, len); 337db8dac20SDavid S. Miller 3384b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 3394b340ae2SBrian Haley return ipv6_recv_rxpmtu(sk, msg, len); 3404b340ae2SBrian Haley 341db8dac20SDavid S. Miller try_again: 342db8dac20SDavid S. Miller skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), 343db8dac20SDavid S. Miller &peeked, &err); 344db8dac20SDavid S. Miller if (!skb) 345db8dac20SDavid S. Miller goto out; 346db8dac20SDavid S. Miller 347db8dac20SDavid S. Miller ulen = skb->len - sizeof(struct udphdr); 34881d54ec8SGerrit Renker if (len > ulen) 34981d54ec8SGerrit Renker len = ulen; 35081d54ec8SGerrit Renker else if (len < ulen) 351db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 352db8dac20SDavid S. Miller 353f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 354f26ba175SWei Yongjun 355db8dac20SDavid S. Miller /* 356db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 357db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 358db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 359db8dac20SDavid S. Miller */ 360db8dac20SDavid S. Miller 36181d54ec8SGerrit Renker if (len < ulen || UDP_SKB_CB(skb)->partial_cov) { 362db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 363db8dac20SDavid S. Miller goto csum_copy_err; 364db8dac20SDavid S. Miller } 365db8dac20SDavid S. Miller 366db8dac20SDavid S. Miller if (skb_csum_unnecessary(skb)) 367db8dac20SDavid S. Miller err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), 36881d54ec8SGerrit Renker msg->msg_iov,len); 369db8dac20SDavid S. Miller else { 370db8dac20SDavid S. Miller err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); 371db8dac20SDavid S. Miller if (err == -EINVAL) 372db8dac20SDavid S. Miller goto csum_copy_err; 373db8dac20SDavid S. Miller } 374db8dac20SDavid S. Miller if (err) 375db8dac20SDavid S. Miller goto out_free; 376db8dac20SDavid S. Miller 377f26ba175SWei Yongjun if (!peeked) { 378f26ba175SWei Yongjun if (is_udp4) 379f26ba175SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 380f26ba175SWei Yongjun UDP_MIB_INDATAGRAMS, is_udplite); 381f26ba175SWei Yongjun else 382235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 383235b9f7aSPavel Emelyanov UDP_MIB_INDATAGRAMS, is_udplite); 384f26ba175SWei Yongjun } 385db8dac20SDavid S. Miller 3863b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 387db8dac20SDavid S. Miller 388db8dac20SDavid S. Miller /* Copy the address. */ 389db8dac20SDavid S. Miller if (msg->msg_name) { 390db8dac20SDavid S. Miller struct sockaddr_in6 *sin6; 391db8dac20SDavid S. Miller 392db8dac20SDavid S. Miller sin6 = (struct sockaddr_in6 *) msg->msg_name; 393db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 394db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 395db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 396db8dac20SDavid S. Miller sin6->sin6_scope_id = 0; 397db8dac20SDavid S. Miller 398f26ba175SWei Yongjun if (is_udp4) 399b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 400b301e82cSBrian Haley &sin6->sin6_addr); 401db8dac20SDavid S. Miller else { 402db8dac20SDavid S. Miller ipv6_addr_copy(&sin6->sin6_addr, 403db8dac20SDavid S. Miller &ipv6_hdr(skb)->saddr); 404db8dac20SDavid S. Miller if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 405db8dac20SDavid S. Miller sin6->sin6_scope_id = IP6CB(skb)->iif; 406db8dac20SDavid S. Miller } 407db8dac20SDavid S. Miller 408db8dac20SDavid S. Miller } 409f26ba175SWei Yongjun if (is_udp4) { 410db8dac20SDavid S. Miller if (inet->cmsg_flags) 411db8dac20SDavid S. Miller ip_cmsg_recv(msg, skb); 412db8dac20SDavid S. Miller } else { 413db8dac20SDavid S. Miller if (np->rxopt.all) 414db8dac20SDavid S. Miller datagram_recv_ctl(sk, msg, skb); 415db8dac20SDavid S. Miller } 416db8dac20SDavid S. Miller 41781d54ec8SGerrit Renker err = len; 418db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 419db8dac20SDavid S. Miller err = ulen; 420db8dac20SDavid S. Miller 421db8dac20SDavid S. Miller out_free: 4229d410c79SEric Dumazet skb_free_datagram_locked(sk, skb); 423db8dac20SDavid S. Miller out: 424db8dac20SDavid S. Miller return err; 425db8dac20SDavid S. Miller 426db8dac20SDavid S. Miller csum_copy_err: 4274b0b72f7SEric Dumazet lock_sock_bh(sk); 4280856f939SWei Yongjun if (!skb_kill_datagram(sk, skb, flags)) { 4290856f939SWei Yongjun if (is_udp4) 4300856f939SWei Yongjun UDP_INC_STATS_USER(sock_net(sk), 4310856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4320856f939SWei Yongjun else 4330856f939SWei Yongjun UDP6_INC_STATS_USER(sock_net(sk), 4340856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4350856f939SWei Yongjun } 4364b0b72f7SEric Dumazet unlock_sock_bh(sk); 437db8dac20SDavid S. Miller 438db8dac20SDavid S. Miller if (flags & MSG_DONTWAIT) 439db8dac20SDavid S. Miller return -EAGAIN; 440db8dac20SDavid S. Miller goto try_again; 441db8dac20SDavid S. Miller } 442db8dac20SDavid S. Miller 443db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 444d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 445645ca708SEric Dumazet struct udp_table *udptable) 446db8dac20SDavid S. Miller { 447db8dac20SDavid S. Miller struct ipv6_pinfo *np; 448db8dac20SDavid S. Miller struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; 449db8dac20SDavid S. Miller struct in6_addr *saddr = &hdr->saddr; 450db8dac20SDavid S. Miller struct in6_addr *daddr = &hdr->daddr; 451db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr*)(skb->data+offset); 452db8dac20SDavid S. Miller struct sock *sk; 453db8dac20SDavid S. Miller int err; 454db8dac20SDavid S. Miller 455c346dca1SYOSHIFUJI Hideaki sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, 456db8dac20SDavid S. Miller saddr, uh->source, inet6_iif(skb), udptable); 457db8dac20SDavid S. Miller if (sk == NULL) 458db8dac20SDavid S. Miller return; 459db8dac20SDavid S. Miller 460db8dac20SDavid S. Miller np = inet6_sk(sk); 461db8dac20SDavid S. Miller 462db8dac20SDavid S. Miller if (!icmpv6_err_convert(type, code, &err) && !np->recverr) 463db8dac20SDavid S. Miller goto out; 464db8dac20SDavid S. Miller 465db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) 466db8dac20SDavid S. Miller goto out; 467db8dac20SDavid S. Miller 468db8dac20SDavid S. Miller if (np->recverr) 469db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 470db8dac20SDavid S. Miller 471db8dac20SDavid S. Miller sk->sk_err = err; 472db8dac20SDavid S. Miller sk->sk_error_report(sk); 473db8dac20SDavid S. Miller out: 474db8dac20SDavid S. Miller sock_put(sk); 475db8dac20SDavid S. Miller } 476db8dac20SDavid S. Miller 477db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 478d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 479d5fdd6baSBrian Haley u8 code, int offset, __be32 info ) 480db8dac20SDavid S. Miller { 481645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 482db8dac20SDavid S. Miller } 483db8dac20SDavid S. Miller 484db8dac20SDavid S. Miller int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) 485db8dac20SDavid S. Miller { 486db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 487db8dac20SDavid S. Miller int rc; 488db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 489db8dac20SDavid S. Miller 490db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 491db8dac20SDavid S. Miller goto drop; 492db8dac20SDavid S. Miller 493db8dac20SDavid S. Miller /* 494db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 495db8dac20SDavid S. Miller */ 496db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 497db8dac20SDavid S. Miller 498db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 499db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" 500db8dac20SDavid S. Miller " %d while full coverage %d requested\n", 501db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 502db8dac20SDavid S. Miller goto drop; 503db8dac20SDavid S. Miller } 504db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 505db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " 506db8dac20SDavid S. Miller "too small, need min %d\n", 507db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 508db8dac20SDavid S. Miller goto drop; 509db8dac20SDavid S. Miller } 510db8dac20SDavid S. Miller } 511db8dac20SDavid S. Miller 512db8dac20SDavid S. Miller if (sk->sk_filter) { 513db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 514db8dac20SDavid S. Miller goto drop; 515db8dac20SDavid S. Miller } 516db8dac20SDavid S. Miller 517db8dac20SDavid S. Miller if ((rc = sock_queue_rcv_skb(sk, skb)) < 0) { 518db8dac20SDavid S. Miller /* Note that an ENOMEM error is charged twice */ 519766e9037SEric Dumazet if (rc == -ENOMEM) 520ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), 521ef28d1a2SPavel Emelyanov UDP_MIB_RCVBUFERRORS, is_udplite); 5228edf19c2SEric Dumazet goto drop_no_sk_drops_inc; 523db8dac20SDavid S. Miller } 524db8dac20SDavid S. Miller 525db8dac20SDavid S. Miller return 0; 526db8dac20SDavid S. Miller drop: 5278edf19c2SEric Dumazet atomic_inc(&sk->sk_drops); 5288edf19c2SEric Dumazet drop_no_sk_drops_inc: 529ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 530db8dac20SDavid S. Miller kfree_skb(skb); 531db8dac20SDavid S. Miller return -1; 532db8dac20SDavid S. Miller } 533db8dac20SDavid S. Miller 534920a4611SEric Dumazet static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, 535db8dac20SDavid S. Miller __be16 loc_port, struct in6_addr *loc_addr, 536db8dac20SDavid S. Miller __be16 rmt_port, struct in6_addr *rmt_addr, 537db8dac20SDavid S. Miller int dif) 538db8dac20SDavid S. Miller { 53988ab1932SEric Dumazet struct hlist_nulls_node *node; 540db8dac20SDavid S. Miller struct sock *s = sk; 541db8dac20SDavid S. Miller unsigned short num = ntohs(loc_port); 542db8dac20SDavid S. Miller 54388ab1932SEric Dumazet sk_nulls_for_each_from(s, node) { 544db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(s); 545db8dac20SDavid S. Miller 546920a4611SEric Dumazet if (!net_eq(sock_net(s), net)) 547b8ad0cbcSDaniel Lezcano continue; 548b8ad0cbcSDaniel Lezcano 549d4cada4aSEric Dumazet if (udp_sk(s)->udp_port_hash == num && 550d4cada4aSEric Dumazet s->sk_family == PF_INET6) { 551db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(s); 552c720c7e8SEric Dumazet if (inet->inet_dport) { 553c720c7e8SEric Dumazet if (inet->inet_dport != rmt_port) 554db8dac20SDavid S. Miller continue; 555db8dac20SDavid S. Miller } 556db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->daddr) && 557db8dac20SDavid S. Miller !ipv6_addr_equal(&np->daddr, rmt_addr)) 558db8dac20SDavid S. Miller continue; 559db8dac20SDavid S. Miller 560db8dac20SDavid S. Miller if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) 561db8dac20SDavid S. Miller continue; 562db8dac20SDavid S. Miller 563db8dac20SDavid S. Miller if (!ipv6_addr_any(&np->rcv_saddr)) { 564db8dac20SDavid S. Miller if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) 565db8dac20SDavid S. Miller continue; 566db8dac20SDavid S. Miller } 567db8dac20SDavid S. Miller if (!inet6_mc_check(s, loc_addr, rmt_addr)) 568db8dac20SDavid S. Miller continue; 569db8dac20SDavid S. Miller return s; 570db8dac20SDavid S. Miller } 571db8dac20SDavid S. Miller } 572db8dac20SDavid S. Miller return NULL; 573db8dac20SDavid S. Miller } 574db8dac20SDavid S. Miller 575a1ab77f9SEric Dumazet static void flush_stack(struct sock **stack, unsigned int count, 576a1ab77f9SEric Dumazet struct sk_buff *skb, unsigned int final) 577a1ab77f9SEric Dumazet { 578a1ab77f9SEric Dumazet unsigned int i; 579a1ab77f9SEric Dumazet struct sock *sk; 580a1ab77f9SEric Dumazet struct sk_buff *skb1; 581a1ab77f9SEric Dumazet 582a1ab77f9SEric Dumazet for (i = 0; i < count; i++) { 583a1ab77f9SEric Dumazet skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); 584a1ab77f9SEric Dumazet 585a1ab77f9SEric Dumazet sk = stack[i]; 586f6b8f32cSEric Dumazet if (skb1) { 587c377411fSEric Dumazet if (sk_rcvqueues_full(sk, skb)) { 588c377411fSEric Dumazet kfree_skb(skb1); 589c377411fSEric Dumazet goto drop; 590c377411fSEric Dumazet } 591a1ab77f9SEric Dumazet bh_lock_sock(sk); 592a1ab77f9SEric Dumazet if (!sock_owned_by_user(sk)) 593a1ab77f9SEric Dumazet udpv6_queue_rcv_skb(sk, skb1); 594a3a858ffSZhu Yi else if (sk_add_backlog(sk, skb1)) { 59555349790SZhu Yi kfree_skb(skb1); 596a1ab77f9SEric Dumazet bh_unlock_sock(sk); 59755349790SZhu Yi goto drop; 59855349790SZhu Yi } 59955349790SZhu Yi bh_unlock_sock(sk); 60055349790SZhu Yi continue; 60155349790SZhu Yi } 60255349790SZhu Yi drop: 603f6b8f32cSEric Dumazet atomic_inc(&sk->sk_drops); 604f6b8f32cSEric Dumazet UDP6_INC_STATS_BH(sock_net(sk), 605f6b8f32cSEric Dumazet UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); 606f6b8f32cSEric Dumazet UDP6_INC_STATS_BH(sock_net(sk), 607f6b8f32cSEric Dumazet UDP_MIB_INERRORS, IS_UDPLITE(sk)); 608a1ab77f9SEric Dumazet } 609a1ab77f9SEric Dumazet } 610db8dac20SDavid S. Miller /* 611db8dac20SDavid S. Miller * Note: called only from the BH handler context, 612db8dac20SDavid S. Miller * so we don't need to lock the hashes. 613db8dac20SDavid S. Miller */ 614e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 615e3163493SPavel Emelyanov struct in6_addr *saddr, struct in6_addr *daddr, 616645ca708SEric Dumazet struct udp_table *udptable) 617db8dac20SDavid S. Miller { 618a1ab77f9SEric Dumazet struct sock *sk, *stack[256 / sizeof(struct sock *)]; 619db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 620f86dcc5aSEric Dumazet struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); 621db8dac20SDavid S. Miller int dif; 622a1ab77f9SEric Dumazet unsigned int i, count = 0; 623db8dac20SDavid S. Miller 624645ca708SEric Dumazet spin_lock(&hslot->lock); 62588ab1932SEric Dumazet sk = sk_nulls_head(&hslot->head); 626db8dac20SDavid S. Miller dif = inet6_iif(skb); 627920a4611SEric Dumazet sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); 628a1ab77f9SEric Dumazet while (sk) { 629a1ab77f9SEric Dumazet stack[count++] = sk; 630a1ab77f9SEric Dumazet sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, 631a1ab77f9SEric Dumazet uh->source, saddr, dif); 632a1ab77f9SEric Dumazet if (unlikely(count == ARRAY_SIZE(stack))) { 633a1ab77f9SEric Dumazet if (!sk) 634a1ab77f9SEric Dumazet break; 635a1ab77f9SEric Dumazet flush_stack(stack, count, skb, ~0); 636a1ab77f9SEric Dumazet count = 0; 637db8dac20SDavid S. Miller } 638a1ab77f9SEric Dumazet } 639a1ab77f9SEric Dumazet /* 640a1ab77f9SEric Dumazet * before releasing the lock, we must take reference on sockets 641a1ab77f9SEric Dumazet */ 642a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 643a1ab77f9SEric Dumazet sock_hold(stack[i]); 644db8dac20SDavid S. Miller 645645ca708SEric Dumazet spin_unlock(&hslot->lock); 646a1ab77f9SEric Dumazet 647a1ab77f9SEric Dumazet if (count) { 648a1ab77f9SEric Dumazet flush_stack(stack, count, skb, count - 1); 649a1ab77f9SEric Dumazet 650a1ab77f9SEric Dumazet for (i = 0; i < count; i++) 651a1ab77f9SEric Dumazet sock_put(stack[i]); 652a1ab77f9SEric Dumazet } else { 653a1ab77f9SEric Dumazet kfree_skb(skb); 654a1ab77f9SEric Dumazet } 655db8dac20SDavid S. Miller return 0; 656db8dac20SDavid S. Miller } 657db8dac20SDavid S. Miller 658db8dac20SDavid S. Miller static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, 659db8dac20SDavid S. Miller int proto) 660db8dac20SDavid S. Miller { 661db8dac20SDavid S. Miller int err; 662db8dac20SDavid S. Miller 663db8dac20SDavid S. Miller UDP_SKB_CB(skb)->partial_cov = 0; 664db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov = skb->len; 665db8dac20SDavid S. Miller 666db8dac20SDavid S. Miller if (proto == IPPROTO_UDPLITE) { 667db8dac20SDavid S. Miller err = udplite_checksum_init(skb, uh); 668db8dac20SDavid S. Miller if (err) 669db8dac20SDavid S. Miller return err; 670db8dac20SDavid S. Miller } 671db8dac20SDavid S. Miller 672db8dac20SDavid S. Miller if (uh->check == 0) { 673db8dac20SDavid S. Miller /* RFC 2460 section 8.1 says that we SHOULD log 674db8dac20SDavid S. Miller this error. Well, it is reasonable. 675db8dac20SDavid S. Miller */ 676db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); 677db8dac20SDavid S. Miller return 1; 678db8dac20SDavid S. Miller } 679db8dac20SDavid S. Miller if (skb->ip_summed == CHECKSUM_COMPLETE && 680db8dac20SDavid S. Miller !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, 681db8dac20SDavid S. Miller skb->len, proto, skb->csum)) 682db8dac20SDavid S. Miller skb->ip_summed = CHECKSUM_UNNECESSARY; 683db8dac20SDavid S. Miller 684db8dac20SDavid S. Miller if (!skb_csum_unnecessary(skb)) 685db8dac20SDavid S. Miller skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 686db8dac20SDavid S. Miller &ipv6_hdr(skb)->daddr, 687db8dac20SDavid S. Miller skb->len, proto, 0)); 688db8dac20SDavid S. Miller 689db8dac20SDavid S. Miller return 0; 690db8dac20SDavid S. Miller } 691db8dac20SDavid S. Miller 692645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 693db8dac20SDavid S. Miller int proto) 694db8dac20SDavid S. Miller { 6953ffe533cSAlexey Dobriyan struct net *net = dev_net(skb->dev); 696db8dac20SDavid S. Miller struct sock *sk; 697db8dac20SDavid S. Miller struct udphdr *uh; 698db8dac20SDavid S. Miller struct in6_addr *saddr, *daddr; 699db8dac20SDavid S. Miller u32 ulen = 0; 700db8dac20SDavid S. Miller 701db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 702db8dac20SDavid S. Miller goto short_packet; 703db8dac20SDavid S. Miller 704db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 705db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 706db8dac20SDavid S. Miller uh = udp_hdr(skb); 707db8dac20SDavid S. Miller 708db8dac20SDavid S. Miller ulen = ntohs(uh->len); 709db8dac20SDavid S. Miller if (ulen > skb->len) 710db8dac20SDavid S. Miller goto short_packet; 711db8dac20SDavid S. Miller 712db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 713db8dac20SDavid S. Miller /* UDP validates ulen. */ 714db8dac20SDavid S. Miller 715db8dac20SDavid S. Miller /* Check for jumbo payload */ 716db8dac20SDavid S. Miller if (ulen == 0) 717db8dac20SDavid S. Miller ulen = skb->len; 718db8dac20SDavid S. Miller 719db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 720db8dac20SDavid S. Miller goto short_packet; 721db8dac20SDavid S. Miller 722db8dac20SDavid S. Miller if (ulen < skb->len) { 723db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 724db8dac20SDavid S. Miller goto short_packet; 725db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 726db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 727db8dac20SDavid S. Miller uh = udp_hdr(skb); 728db8dac20SDavid S. Miller } 729db8dac20SDavid S. Miller } 730db8dac20SDavid S. Miller 731db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 732db8dac20SDavid S. Miller goto discard; 733db8dac20SDavid S. Miller 734db8dac20SDavid S. Miller /* 735db8dac20SDavid S. Miller * Multicast receive code 736db8dac20SDavid S. Miller */ 737db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 738e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 739e3163493SPavel Emelyanov saddr, daddr, udptable); 740db8dac20SDavid S. Miller 741db8dac20SDavid S. Miller /* Unicast */ 742db8dac20SDavid S. Miller 743db8dac20SDavid S. Miller /* 744db8dac20SDavid S. Miller * check socket cache ... must talk to Alan about his plans 745db8dac20SDavid S. Miller * for sock caches... i'll skip this for now. 746db8dac20SDavid S. Miller */ 747607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 748db8dac20SDavid S. Miller 749db8dac20SDavid S. Miller if (sk == NULL) { 750db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 751db8dac20SDavid S. Miller goto discard; 752db8dac20SDavid S. Miller 753db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 754db8dac20SDavid S. Miller goto discard; 755ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, 756ef28d1a2SPavel Emelyanov proto == IPPROTO_UDPLITE); 757db8dac20SDavid S. Miller 7583ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 759db8dac20SDavid S. Miller 760db8dac20SDavid S. Miller kfree_skb(skb); 761db8dac20SDavid S. Miller return 0; 762db8dac20SDavid S. Miller } 763db8dac20SDavid S. Miller 764db8dac20SDavid S. Miller /* deliver */ 765db8dac20SDavid S. Miller 766c377411fSEric Dumazet if (sk_rcvqueues_full(sk, skb)) { 767c377411fSEric Dumazet sock_put(sk); 768c377411fSEric Dumazet goto discard; 769c377411fSEric Dumazet } 770d97106eaSHerbert Xu bh_lock_sock(sk); 771db8dac20SDavid S. Miller if (!sock_owned_by_user(sk)) 772db8dac20SDavid S. Miller udpv6_queue_rcv_skb(sk, skb); 773a3a858ffSZhu Yi else if (sk_add_backlog(sk, skb)) { 77455349790SZhu Yi atomic_inc(&sk->sk_drops); 77555349790SZhu Yi bh_unlock_sock(sk); 77655349790SZhu Yi sock_put(sk); 77755349790SZhu Yi goto discard; 77855349790SZhu Yi } 779db8dac20SDavid S. Miller bh_unlock_sock(sk); 780db8dac20SDavid S. Miller sock_put(sk); 781db8dac20SDavid S. Miller return 0; 782db8dac20SDavid S. Miller 783db8dac20SDavid S. Miller short_packet: 784db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", 785db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 786db8dac20SDavid S. Miller ulen, skb->len); 787db8dac20SDavid S. Miller 788db8dac20SDavid S. Miller discard: 789ef28d1a2SPavel Emelyanov UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 790db8dac20SDavid S. Miller kfree_skb(skb); 791db8dac20SDavid S. Miller return 0; 792db8dac20SDavid S. Miller } 793db8dac20SDavid S. Miller 794db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 795db8dac20SDavid S. Miller { 796645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 797db8dac20SDavid S. Miller } 798db8dac20SDavid S. Miller 799db8dac20SDavid S. Miller /* 800db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 801db8dac20SDavid S. Miller */ 802db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 803db8dac20SDavid S. Miller { 804db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 805db8dac20SDavid S. Miller 80636d926b9SDenis V. Lunev if (up->pending == AF_INET) 80736d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 80836d926b9SDenis V. Lunev else if (up->pending) { 809db8dac20SDavid S. Miller up->len = 0; 810db8dac20SDavid S. Miller up->pending = 0; 811db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 812db8dac20SDavid S. Miller } 813db8dac20SDavid S. Miller } 814db8dac20SDavid S. Miller 815493c6be3SSridhar Samudrala /** 816493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 817493c6be3SSridhar Samudrala * @sk: socket we are sending on 818493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 819493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 820493c6be3SSridhar Samudrala */ 821493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 822493c6be3SSridhar Samudrala const struct in6_addr *saddr, 823493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 824493c6be3SSridhar Samudrala { 825493c6be3SSridhar Samudrala unsigned int offset; 826493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 827493c6be3SSridhar Samudrala __wsum csum = 0; 828493c6be3SSridhar Samudrala 829493c6be3SSridhar Samudrala if (skb_queue_len(&sk->sk_write_queue) == 1) { 830493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 831493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 832493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 833493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 834493c6be3SSridhar Samudrala } else { 835493c6be3SSridhar Samudrala /* 836493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 837493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 838493c6be3SSridhar Samudrala * should be together 839493c6be3SSridhar Samudrala */ 840493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 841493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 842493c6be3SSridhar Samudrala 843493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 844493c6be3SSridhar Samudrala 845493c6be3SSridhar Samudrala skb_queue_walk(&sk->sk_write_queue, skb) { 846493c6be3SSridhar Samudrala csum = csum_add(csum, skb->csum); 847493c6be3SSridhar Samudrala } 848493c6be3SSridhar Samudrala 849493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 850493c6be3SSridhar Samudrala csum); 851493c6be3SSridhar Samudrala if (uh->check == 0) 852493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 853493c6be3SSridhar Samudrala } 854493c6be3SSridhar Samudrala } 855493c6be3SSridhar Samudrala 856db8dac20SDavid S. Miller /* 857db8dac20SDavid S. Miller * Sending 858db8dac20SDavid S. Miller */ 859db8dac20SDavid S. Miller 860db8dac20SDavid S. Miller static int udp_v6_push_pending_frames(struct sock *sk) 861db8dac20SDavid S. Miller { 862db8dac20SDavid S. Miller struct sk_buff *skb; 863db8dac20SDavid S. Miller struct udphdr *uh; 864db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 865db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 866db8dac20SDavid S. Miller struct flowi *fl = &inet->cork.fl; 867db8dac20SDavid S. Miller int err = 0; 868db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 869db8dac20SDavid S. Miller __wsum csum = 0; 870db8dac20SDavid S. Miller 871db8dac20SDavid S. Miller /* Grab the skbuff where UDP header space exists. */ 872db8dac20SDavid S. Miller if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 873db8dac20SDavid S. Miller goto out; 874db8dac20SDavid S. Miller 875db8dac20SDavid S. Miller /* 876db8dac20SDavid S. Miller * Create a UDP header 877db8dac20SDavid S. Miller */ 878db8dac20SDavid S. Miller uh = udp_hdr(skb); 879db8dac20SDavid S. Miller uh->source = fl->fl_ip_sport; 880db8dac20SDavid S. Miller uh->dest = fl->fl_ip_dport; 881db8dac20SDavid S. Miller uh->len = htons(up->len); 882db8dac20SDavid S. Miller uh->check = 0; 883db8dac20SDavid S. Miller 884db8dac20SDavid S. Miller if (is_udplite) 885db8dac20SDavid S. Miller csum = udplite_csum_outgoing(sk, skb); 886493c6be3SSridhar Samudrala else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 887493c6be3SSridhar Samudrala udp6_hwcsum_outgoing(sk, skb, &fl->fl6_src, &fl->fl6_dst, 888493c6be3SSridhar Samudrala up->len); 889493c6be3SSridhar Samudrala goto send; 890493c6be3SSridhar Samudrala } else 891db8dac20SDavid S. Miller csum = udp_csum_outgoing(sk, skb); 892db8dac20SDavid S. Miller 893db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 894db8dac20SDavid S. Miller uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, 895db8dac20SDavid S. Miller up->len, fl->proto, csum ); 896db8dac20SDavid S. Miller if (uh->check == 0) 897db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 898db8dac20SDavid S. Miller 899493c6be3SSridhar Samudrala send: 900db8dac20SDavid S. Miller err = ip6_push_pending_frames(sk); 9016ce9e7b5SEric Dumazet if (err) { 9026ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 9036ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9046ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 9056ce9e7b5SEric Dumazet err = 0; 9066ce9e7b5SEric Dumazet } 9076ce9e7b5SEric Dumazet } else 9086ce9e7b5SEric Dumazet UDP6_INC_STATS_USER(sock_net(sk), 9096ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 910db8dac20SDavid S. Miller out: 911db8dac20SDavid S. Miller up->len = 0; 912db8dac20SDavid S. Miller up->pending = 0; 913db8dac20SDavid S. Miller return err; 914db8dac20SDavid S. Miller } 915db8dac20SDavid S. Miller 916db8dac20SDavid S. Miller int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, 917db8dac20SDavid S. Miller struct msghdr *msg, size_t len) 918db8dac20SDavid S. Miller { 919db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 920db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 921db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 922db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 923db8dac20SDavid S. Miller struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; 924db8dac20SDavid S. Miller struct in6_addr *daddr, *final_p = NULL, final; 925db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 926db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 927db8dac20SDavid S. Miller struct flowi fl; 928db8dac20SDavid S. Miller struct dst_entry *dst; 929db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 930db8dac20SDavid S. Miller int ulen = len; 931db8dac20SDavid S. Miller int hlimit = -1; 932db8dac20SDavid S. Miller int tclass = -1; 93313b52cd4SBrian Haley int dontfrag = -1; 934db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 935db8dac20SDavid S. Miller int err; 936db8dac20SDavid S. Miller int connected = 0; 937db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 938db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 939db8dac20SDavid S. Miller 940db8dac20SDavid S. Miller /* destination address check */ 941db8dac20SDavid S. Miller if (sin6) { 942db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 943db8dac20SDavid S. Miller return -EINVAL; 944db8dac20SDavid S. Miller 945db8dac20SDavid S. Miller switch (sin6->sin6_family) { 946db8dac20SDavid S. Miller case AF_INET6: 947db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 948db8dac20SDavid S. Miller return -EINVAL; 949db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 950db8dac20SDavid S. Miller break; 951db8dac20SDavid S. Miller case AF_INET: 952db8dac20SDavid S. Miller goto do_udp_sendmsg; 953db8dac20SDavid S. Miller case AF_UNSPEC: 954db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 955db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 956db8dac20SDavid S. Miller daddr = NULL; 957db8dac20SDavid S. Miller break; 958db8dac20SDavid S. Miller default: 959db8dac20SDavid S. Miller return -EINVAL; 960db8dac20SDavid S. Miller } 961db8dac20SDavid S. Miller } else if (!up->pending) { 962db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 963db8dac20SDavid S. Miller return -EDESTADDRREQ; 964db8dac20SDavid S. Miller daddr = &np->daddr; 965db8dac20SDavid S. Miller } else 966db8dac20SDavid S. Miller daddr = NULL; 967db8dac20SDavid S. Miller 968db8dac20SDavid S. Miller if (daddr) { 969db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 970db8dac20SDavid S. Miller struct sockaddr_in sin; 971db8dac20SDavid S. Miller sin.sin_family = AF_INET; 972c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 973db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 974db8dac20SDavid S. Miller msg->msg_name = &sin; 975db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 976db8dac20SDavid S. Miller do_udp_sendmsg: 977db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 978db8dac20SDavid S. Miller return -ENETUNREACH; 979db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 980db8dac20SDavid S. Miller } 981db8dac20SDavid S. Miller } 982db8dac20SDavid S. Miller 983db8dac20SDavid S. Miller if (up->pending == AF_INET) 984db8dac20SDavid S. Miller return udp_sendmsg(iocb, sk, msg, len); 985db8dac20SDavid S. Miller 986db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 987db8dac20SDavid S. Miller better check is made in ip6_append_data(). 988db8dac20SDavid S. Miller */ 989db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 990db8dac20SDavid S. Miller return -EMSGSIZE; 991db8dac20SDavid S. Miller 992db8dac20SDavid S. Miller if (up->pending) { 993db8dac20SDavid S. Miller /* 994db8dac20SDavid S. Miller * There are pending frames. 995db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 996db8dac20SDavid S. Miller */ 997db8dac20SDavid S. Miller lock_sock(sk); 998db8dac20SDavid S. Miller if (likely(up->pending)) { 999db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1000db8dac20SDavid S. Miller release_sock(sk); 1001db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1002db8dac20SDavid S. Miller } 1003db8dac20SDavid S. Miller dst = NULL; 1004db8dac20SDavid S. Miller goto do_append_data; 1005db8dac20SDavid S. Miller } 1006db8dac20SDavid S. Miller release_sock(sk); 1007db8dac20SDavid S. Miller } 1008db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1009db8dac20SDavid S. Miller 1010db8dac20SDavid S. Miller memset(&fl, 0, sizeof(fl)); 1011db8dac20SDavid S. Miller 1012db8dac20SDavid S. Miller if (sin6) { 1013db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1014db8dac20SDavid S. Miller return -EINVAL; 1015db8dac20SDavid S. Miller 1016db8dac20SDavid S. Miller fl.fl_ip_dport = sin6->sin6_port; 1017db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1018db8dac20SDavid S. Miller 1019db8dac20SDavid S. Miller if (np->sndflow) { 1020db8dac20SDavid S. Miller fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 1021db8dac20SDavid S. Miller if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { 1022db8dac20SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); 1023db8dac20SDavid S. Miller if (flowlabel == NULL) 1024db8dac20SDavid S. Miller return -EINVAL; 1025db8dac20SDavid S. Miller daddr = &flowlabel->dst; 1026db8dac20SDavid S. Miller } 1027db8dac20SDavid S. Miller } 1028db8dac20SDavid S. Miller 1029db8dac20SDavid S. Miller /* 1030db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1031db8dac20SDavid S. Miller * sk->sk_dst_cache. 1032db8dac20SDavid S. Miller */ 1033db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1034db8dac20SDavid S. Miller ipv6_addr_equal(daddr, &np->daddr)) 1035db8dac20SDavid S. Miller daddr = &np->daddr; 1036db8dac20SDavid S. Miller 1037db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1038db8dac20SDavid S. Miller sin6->sin6_scope_id && 1039db8dac20SDavid S. Miller ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) 1040db8dac20SDavid S. Miller fl.oif = sin6->sin6_scope_id; 1041db8dac20SDavid S. Miller } else { 1042db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1043db8dac20SDavid S. Miller return -EDESTADDRREQ; 1044db8dac20SDavid S. Miller 1045c720c7e8SEric Dumazet fl.fl_ip_dport = inet->inet_dport; 1046db8dac20SDavid S. Miller daddr = &np->daddr; 1047db8dac20SDavid S. Miller fl.fl6_flowlabel = np->flow_label; 1048db8dac20SDavid S. Miller connected = 1; 1049db8dac20SDavid S. Miller } 1050db8dac20SDavid S. Miller 1051db8dac20SDavid S. Miller if (!fl.oif) 1052db8dac20SDavid S. Miller fl.oif = sk->sk_bound_dev_if; 1053db8dac20SDavid S. Miller 10549f690db7SYang Hongyang if (!fl.oif) 10559f690db7SYang Hongyang fl.oif = np->sticky_pktinfo.ipi6_ifindex; 10569f690db7SYang Hongyang 105751953d5bSBrian Haley fl.mark = sk->sk_mark; 105851953d5bSBrian Haley 1059db8dac20SDavid S. Miller if (msg->msg_controllen) { 1060db8dac20SDavid S. Miller opt = &opt_space; 1061db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1062db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 1063db8dac20SDavid S. Miller 106413b52cd4SBrian Haley err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, 106513b52cd4SBrian Haley &tclass, &dontfrag); 1066db8dac20SDavid S. Miller if (err < 0) { 1067db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1068db8dac20SDavid S. Miller return err; 1069db8dac20SDavid S. Miller } 1070db8dac20SDavid S. Miller if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 1071db8dac20SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); 1072db8dac20SDavid S. Miller if (flowlabel == NULL) 1073db8dac20SDavid S. Miller return -EINVAL; 1074db8dac20SDavid S. Miller } 1075db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1076db8dac20SDavid S. Miller opt = NULL; 1077db8dac20SDavid S. Miller connected = 0; 1078db8dac20SDavid S. Miller } 1079db8dac20SDavid S. Miller if (opt == NULL) 1080db8dac20SDavid S. Miller opt = np->opt; 1081db8dac20SDavid S. Miller if (flowlabel) 1082db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1083db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 1084db8dac20SDavid S. Miller 1085db8dac20SDavid S. Miller fl.proto = sk->sk_protocol; 1086876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 1087db8dac20SDavid S. Miller ipv6_addr_copy(&fl.fl6_dst, daddr); 1088876c7f41SBrian Haley else 1089876c7f41SBrian Haley fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 1090db8dac20SDavid S. Miller if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) 1091db8dac20SDavid S. Miller ipv6_addr_copy(&fl.fl6_src, &np->saddr); 1092c720c7e8SEric Dumazet fl.fl_ip_sport = inet->inet_sport; 1093db8dac20SDavid S. Miller 1094db8dac20SDavid S. Miller /* merge ip6_build_xmit from ip6_output */ 1095db8dac20SDavid S. Miller if (opt && opt->srcrt) { 1096db8dac20SDavid S. Miller struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; 1097db8dac20SDavid S. Miller ipv6_addr_copy(&final, &fl.fl6_dst); 1098db8dac20SDavid S. Miller ipv6_addr_copy(&fl.fl6_dst, rt0->addr); 1099db8dac20SDavid S. Miller final_p = &final; 1100db8dac20SDavid S. Miller connected = 0; 1101db8dac20SDavid S. Miller } 1102db8dac20SDavid S. Miller 1103db8dac20SDavid S. Miller if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { 1104db8dac20SDavid S. Miller fl.oif = np->mcast_oif; 1105db8dac20SDavid S. Miller connected = 0; 1106db8dac20SDavid S. Miller } 1107db8dac20SDavid S. Miller 1108db8dac20SDavid S. Miller security_sk_classify_flow(sk, &fl); 1109db8dac20SDavid S. Miller 1110db8dac20SDavid S. Miller err = ip6_sk_dst_lookup(sk, &dst, &fl); 1111db8dac20SDavid S. Miller if (err) 1112db8dac20SDavid S. Miller goto out; 1113db8dac20SDavid S. Miller if (final_p) 1114db8dac20SDavid S. Miller ipv6_addr_copy(&fl.fl6_dst, final_p); 1115db8dac20SDavid S. Miller 111652479b62SAlexey Dobriyan err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); 111752479b62SAlexey Dobriyan if (err < 0) { 1118db8dac20SDavid S. Miller if (err == -EREMOTE) 1119db8dac20SDavid S. Miller err = ip6_dst_blackhole(sk, &dst, &fl); 1120db8dac20SDavid S. Miller if (err < 0) 1121db8dac20SDavid S. Miller goto out; 1122db8dac20SDavid S. Miller } 1123db8dac20SDavid S. Miller 1124db8dac20SDavid S. Miller if (hlimit < 0) { 1125db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(&fl.fl6_dst)) 1126db8dac20SDavid S. Miller hlimit = np->mcast_hops; 1127db8dac20SDavid S. Miller else 1128db8dac20SDavid S. Miller hlimit = np->hop_limit; 1129db8dac20SDavid S. Miller if (hlimit < 0) 11306b75d090SYOSHIFUJI Hideaki hlimit = ip6_dst_hoplimit(dst); 1131db8dac20SDavid S. Miller } 1132db8dac20SDavid S. Miller 1133db8dac20SDavid S. Miller if (tclass < 0) 1134e651f03aSGerrit Renker tclass = np->tclass; 1135db8dac20SDavid S. Miller 113613b52cd4SBrian Haley if (dontfrag < 0) 113713b52cd4SBrian Haley dontfrag = np->dontfrag; 113813b52cd4SBrian Haley 1139db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1140db8dac20SDavid S. Miller goto do_confirm; 1141db8dac20SDavid S. Miller back_from_confirm: 1142db8dac20SDavid S. Miller 1143db8dac20SDavid S. Miller lock_sock(sk); 1144db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1145db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1146db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1147db8dac20SDavid S. Miller release_sock(sk); 1148db8dac20SDavid S. Miller 1149db8dac20SDavid S. Miller LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); 1150db8dac20SDavid S. Miller err = -EINVAL; 1151db8dac20SDavid S. Miller goto out; 1152db8dac20SDavid S. Miller } 1153db8dac20SDavid S. Miller 1154db8dac20SDavid S. Miller up->pending = AF_INET6; 1155db8dac20SDavid S. Miller 1156db8dac20SDavid S. Miller do_append_data: 1157db8dac20SDavid S. Miller up->len += ulen; 1158db8dac20SDavid S. Miller getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1159db8dac20SDavid S. Miller err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, 1160db8dac20SDavid S. Miller sizeof(struct udphdr), hlimit, tclass, opt, &fl, 1161db8dac20SDavid S. Miller (struct rt6_info*)dst, 116213b52cd4SBrian Haley corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); 1163db8dac20SDavid S. Miller if (err) 1164db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1165db8dac20SDavid S. Miller else if (!corkreq) 1166db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1167db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1168db8dac20SDavid S. Miller up->pending = 0; 1169db8dac20SDavid S. Miller 1170db8dac20SDavid S. Miller if (dst) { 1171db8dac20SDavid S. Miller if (connected) { 1172db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 1173db8dac20SDavid S. Miller ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? 1174db8dac20SDavid S. Miller &np->daddr : NULL, 1175db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 1176db8dac20SDavid S. Miller ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? 1177db8dac20SDavid S. Miller &np->saddr : 1178db8dac20SDavid S. Miller #endif 1179db8dac20SDavid S. Miller NULL); 1180db8dac20SDavid S. Miller } else { 1181db8dac20SDavid S. Miller dst_release(dst); 1182db8dac20SDavid S. Miller } 1183a3c96089SYOSHIFUJI Hideaki dst = NULL; 1184db8dac20SDavid S. Miller } 1185db8dac20SDavid S. Miller 1186db8dac20SDavid S. Miller if (err > 0) 1187db8dac20SDavid S. Miller err = np->recverr ? net_xmit_errno(err) : 0; 1188db8dac20SDavid S. Miller release_sock(sk); 1189db8dac20SDavid S. Miller out: 1190a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1191db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1192db8dac20SDavid S. Miller if (!err) 1193db8dac20SDavid S. Miller return len; 1194db8dac20SDavid S. Miller /* 1195db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1196db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1197db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1198db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1199db8dac20SDavid S. Miller * seems like overkill. 1200db8dac20SDavid S. Miller */ 1201db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 1202235b9f7aSPavel Emelyanov UDP6_INC_STATS_USER(sock_net(sk), 1203235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1204db8dac20SDavid S. Miller } 1205db8dac20SDavid S. Miller return err; 1206db8dac20SDavid S. Miller 1207db8dac20SDavid S. Miller do_confirm: 1208db8dac20SDavid S. Miller dst_confirm(dst); 1209db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1210db8dac20SDavid S. Miller goto back_from_confirm; 1211db8dac20SDavid S. Miller err = 0; 1212db8dac20SDavid S. Miller goto out; 1213db8dac20SDavid S. Miller } 1214db8dac20SDavid S. Miller 12157d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1216db8dac20SDavid S. Miller { 1217db8dac20SDavid S. Miller lock_sock(sk); 1218db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1219db8dac20SDavid S. Miller release_sock(sk); 1220db8dac20SDavid S. Miller 1221db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1222db8dac20SDavid S. Miller } 1223db8dac20SDavid S. Miller 1224db8dac20SDavid S. Miller /* 1225db8dac20SDavid S. Miller * Socket option code for UDP 1226db8dac20SDavid S. Miller */ 1227db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1228b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1229db8dac20SDavid S. Miller { 1230db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1231db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1232db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1233db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1234db8dac20SDavid S. Miller } 1235db8dac20SDavid S. Miller 1236db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1237db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1238b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1239db8dac20SDavid S. Miller { 1240db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1241db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1242db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1243db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1244db8dac20SDavid S. Miller } 1245db8dac20SDavid S. Miller #endif 1246db8dac20SDavid S. Miller 1247db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1248db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1249db8dac20SDavid S. Miller { 1250db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1251db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1252db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1253db8dac20SDavid S. Miller } 1254db8dac20SDavid S. Miller 1255db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1256db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1257db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1258db8dac20SDavid S. Miller { 1259db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1260db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1261db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1262db8dac20SDavid S. Miller } 1263db8dac20SDavid S. Miller #endif 1264db8dac20SDavid S. Miller 1265ba735425SSridhar Samudrala static int udp6_ufo_send_check(struct sk_buff *skb) 1266ba735425SSridhar Samudrala { 1267ba735425SSridhar Samudrala struct ipv6hdr *ipv6h; 1268ba735425SSridhar Samudrala struct udphdr *uh; 1269ba735425SSridhar Samudrala 1270ba735425SSridhar Samudrala if (!pskb_may_pull(skb, sizeof(*uh))) 1271ba735425SSridhar Samudrala return -EINVAL; 1272ba735425SSridhar Samudrala 1273ba735425SSridhar Samudrala ipv6h = ipv6_hdr(skb); 1274ba735425SSridhar Samudrala uh = udp_hdr(skb); 1275ba735425SSridhar Samudrala 1276ba735425SSridhar Samudrala uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, 1277ba735425SSridhar Samudrala IPPROTO_UDP, 0); 1278ba735425SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 1279ba735425SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 1280ba735425SSridhar Samudrala skb->ip_summed = CHECKSUM_PARTIAL; 1281ba735425SSridhar Samudrala return 0; 1282ba735425SSridhar Samudrala } 1283ba735425SSridhar Samudrala 1284ba735425SSridhar Samudrala static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, int features) 1285ba735425SSridhar Samudrala { 1286ba735425SSridhar Samudrala struct sk_buff *segs = ERR_PTR(-EINVAL); 1287ba735425SSridhar Samudrala unsigned int mss; 1288ba735425SSridhar Samudrala unsigned int unfrag_ip6hlen, unfrag_len; 1289ba735425SSridhar Samudrala struct frag_hdr *fptr; 1290ba735425SSridhar Samudrala u8 *mac_start, *prevhdr; 1291ba735425SSridhar Samudrala u8 nexthdr; 1292ba735425SSridhar Samudrala u8 frag_hdr_sz = sizeof(struct frag_hdr); 1293ba735425SSridhar Samudrala int offset; 1294ba735425SSridhar Samudrala __wsum csum; 1295ba735425SSridhar Samudrala 1296ba735425SSridhar Samudrala mss = skb_shinfo(skb)->gso_size; 1297ba735425SSridhar Samudrala if (unlikely(skb->len <= mss)) 1298ba735425SSridhar Samudrala goto out; 1299ba735425SSridhar Samudrala 1300ba735425SSridhar Samudrala if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { 1301ba735425SSridhar Samudrala /* Packet is from an untrusted source, reset gso_segs. */ 1302ba735425SSridhar Samudrala int type = skb_shinfo(skb)->gso_type; 1303ba735425SSridhar Samudrala 1304ba735425SSridhar Samudrala if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || 1305ba735425SSridhar Samudrala !(type & (SKB_GSO_UDP)))) 1306ba735425SSridhar Samudrala goto out; 1307ba735425SSridhar Samudrala 1308ba735425SSridhar Samudrala skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); 1309ba735425SSridhar Samudrala 1310ba735425SSridhar Samudrala segs = NULL; 1311ba735425SSridhar Samudrala goto out; 1312ba735425SSridhar Samudrala } 1313ba735425SSridhar Samudrala 1314ba735425SSridhar Samudrala /* Do software UFO. Complete and fill in the UDP checksum as HW cannot 1315ba735425SSridhar Samudrala * do checksum of UDP packets sent as multiple IP fragments. 1316ba735425SSridhar Samudrala */ 1317ba735425SSridhar Samudrala offset = skb->csum_start - skb_headroom(skb); 1318ba735425SSridhar Samudrala csum = skb_checksum(skb, offset, skb->len- offset, 0); 1319ba735425SSridhar Samudrala offset += skb->csum_offset; 1320ba735425SSridhar Samudrala *(__sum16 *)(skb->data + offset) = csum_fold(csum); 1321ba735425SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 1322ba735425SSridhar Samudrala 1323ba735425SSridhar Samudrala /* Check if there is enough headroom to insert fragment header. */ 1324ba735425SSridhar Samudrala if ((skb_headroom(skb) < frag_hdr_sz) && 1325ba735425SSridhar Samudrala pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) 1326ba735425SSridhar Samudrala goto out; 1327ba735425SSridhar Samudrala 1328ba735425SSridhar Samudrala /* Find the unfragmentable header and shift it left by frag_hdr_sz 1329ba735425SSridhar Samudrala * bytes to insert fragment header. 1330ba735425SSridhar Samudrala */ 1331ba735425SSridhar Samudrala unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); 1332ba735425SSridhar Samudrala nexthdr = *prevhdr; 1333ba735425SSridhar Samudrala *prevhdr = NEXTHDR_FRAGMENT; 1334ba735425SSridhar Samudrala unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + 1335ba735425SSridhar Samudrala unfrag_ip6hlen; 1336ba735425SSridhar Samudrala mac_start = skb_mac_header(skb); 1337ba735425SSridhar Samudrala memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); 1338ba735425SSridhar Samudrala 1339ba735425SSridhar Samudrala skb->mac_header -= frag_hdr_sz; 1340ba735425SSridhar Samudrala skb->network_header -= frag_hdr_sz; 1341ba735425SSridhar Samudrala 1342ba735425SSridhar Samudrala fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); 1343ba735425SSridhar Samudrala fptr->nexthdr = nexthdr; 1344ba735425SSridhar Samudrala fptr->reserved = 0; 1345ba735425SSridhar Samudrala ipv6_select_ident(fptr); 1346ba735425SSridhar Samudrala 1347ba735425SSridhar Samudrala /* Fragment the skb. ipv6 header and the remaining fields of the 1348ba735425SSridhar Samudrala * fragment header are updated in ipv6_gso_segment() 1349ba735425SSridhar Samudrala */ 1350ba735425SSridhar Samudrala segs = skb_segment(skb, features); 1351ba735425SSridhar Samudrala 1352ba735425SSridhar Samudrala out: 1353ba735425SSridhar Samudrala return segs; 1354ba735425SSridhar Samudrala } 1355ba735425SSridhar Samudrala 135641135cc8SAlexey Dobriyan static const struct inet6_protocol udpv6_protocol = { 1357db8dac20SDavid S. Miller .handler = udpv6_rcv, 1358db8dac20SDavid S. Miller .err_handler = udpv6_err, 1359ba735425SSridhar Samudrala .gso_send_check = udp6_ufo_send_check, 1360ba735425SSridhar Samudrala .gso_segment = udp6_ufo_fragment, 1361db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1362db8dac20SDavid S. Miller }; 1363db8dac20SDavid S. Miller 1364db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1365db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1366db8dac20SDavid S. Miller 1367db8dac20SDavid S. Miller static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) 1368db8dac20SDavid S. Miller { 1369db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sp); 1370db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sp); 1371db8dac20SDavid S. Miller struct in6_addr *dest, *src; 1372db8dac20SDavid S. Miller __u16 destp, srcp; 1373db8dac20SDavid S. Miller 1374db8dac20SDavid S. Miller dest = &np->daddr; 1375db8dac20SDavid S. Miller src = &np->rcv_saddr; 1376c720c7e8SEric Dumazet destp = ntohs(inet->inet_dport); 1377c720c7e8SEric Dumazet srcp = ntohs(inet->inet_sport); 1378db8dac20SDavid S. Miller seq_printf(seq, 1379f86dcc5aSEric Dumazet "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 1380cb61cb9bSEric Dumazet "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", 1381db8dac20SDavid S. Miller bucket, 1382db8dac20SDavid S. Miller src->s6_addr32[0], src->s6_addr32[1], 1383db8dac20SDavid S. Miller src->s6_addr32[2], src->s6_addr32[3], srcp, 1384db8dac20SDavid S. Miller dest->s6_addr32[0], dest->s6_addr32[1], 1385db8dac20SDavid S. Miller dest->s6_addr32[2], dest->s6_addr32[3], destp, 1386db8dac20SDavid S. Miller sp->sk_state, 138731e6d363SEric Dumazet sk_wmem_alloc_get(sp), 138831e6d363SEric Dumazet sk_rmem_alloc_get(sp), 1389db8dac20SDavid S. Miller 0, 0L, 0, 1390db8dac20SDavid S. Miller sock_i_uid(sp), 0, 1391db8dac20SDavid S. Miller sock_i_ino(sp), 1392cb61cb9bSEric Dumazet atomic_read(&sp->sk_refcnt), sp, 1393cb61cb9bSEric Dumazet atomic_read(&sp->sk_drops)); 1394db8dac20SDavid S. Miller } 1395db8dac20SDavid S. Miller 1396db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1397db8dac20SDavid S. Miller { 1398db8dac20SDavid S. Miller if (v == SEQ_START_TOKEN) 1399db8dac20SDavid S. Miller seq_printf(seq, 1400db8dac20SDavid S. Miller " sl " 1401db8dac20SDavid S. Miller "local_address " 1402db8dac20SDavid S. Miller "remote_address " 1403db8dac20SDavid S. Miller "st tx_queue rx_queue tr tm->when retrnsmt" 1404cb61cb9bSEric Dumazet " uid timeout inode ref pointer drops\n"); 1405db8dac20SDavid S. Miller else 1406db8dac20SDavid S. Miller udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); 1407db8dac20SDavid S. Miller return 0; 1408db8dac20SDavid S. Miller } 1409db8dac20SDavid S. Miller 1410db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1411db8dac20SDavid S. Miller .name = "udp6", 1412db8dac20SDavid S. Miller .family = AF_INET6, 1413645ca708SEric Dumazet .udp_table = &udp_table, 14144ad96d39SDenis V. Lunev .seq_fops = { 14154ad96d39SDenis V. Lunev .owner = THIS_MODULE, 14164ad96d39SDenis V. Lunev }, 1417dda61925SDenis V. Lunev .seq_ops = { 1418dda61925SDenis V. Lunev .show = udp6_seq_show, 1419dda61925SDenis V. Lunev }, 1420db8dac20SDavid S. Miller }; 1421db8dac20SDavid S. Miller 14222c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1423db8dac20SDavid S. Miller { 14240c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1425db8dac20SDavid S. Miller } 1426db8dac20SDavid S. Miller 14270c96d8c5SDaniel Lezcano void udp6_proc_exit(struct net *net) { 14280c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1429db8dac20SDavid S. Miller } 1430db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1431db8dac20SDavid S. Miller 1432db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1433db8dac20SDavid S. Miller 1434db8dac20SDavid S. Miller struct proto udpv6_prot = { 1435db8dac20SDavid S. Miller .name = "UDPv6", 1436db8dac20SDavid S. Miller .owner = THIS_MODULE, 1437db8dac20SDavid S. Miller .close = udp_lib_close, 1438db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1439db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1440db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1441db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1442db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1443db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1444db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1445db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1446db8dac20SDavid S. Miller .backlog_rcv = udpv6_queue_rcv_skb, 1447db8dac20SDavid S. Miller .hash = udp_lib_hash, 1448db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1449db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1450db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1451db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1452db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1453db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1454db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1455271b72c7SEric Dumazet .slab_flags = SLAB_DESTROY_BY_RCU, 1456645ca708SEric Dumazet .h.udp_table = &udp_table, 1457db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1458db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1459db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1460db8dac20SDavid S. Miller #endif 1461db8dac20SDavid S. Miller }; 1462db8dac20SDavid S. Miller 1463db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1464db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1465db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1466db8dac20SDavid S. Miller .prot = &udpv6_prot, 1467db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1468db8dac20SDavid S. Miller .no_check = UDP_CSUM_DEFAULT, 1469db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1470db8dac20SDavid S. Miller }; 1471db8dac20SDavid S. Miller 1472db8dac20SDavid S. Miller 1473db8dac20SDavid S. Miller int __init udpv6_init(void) 1474db8dac20SDavid S. Miller { 1475db8dac20SDavid S. Miller int ret; 1476db8dac20SDavid S. Miller 1477db8dac20SDavid S. Miller ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 1478db8dac20SDavid S. Miller if (ret) 1479db8dac20SDavid S. Miller goto out; 1480db8dac20SDavid S. Miller 1481db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1482db8dac20SDavid S. Miller if (ret) 1483db8dac20SDavid S. Miller goto out_udpv6_protocol; 1484db8dac20SDavid S. Miller out: 1485db8dac20SDavid S. Miller return ret; 1486db8dac20SDavid S. Miller 1487db8dac20SDavid S. Miller out_udpv6_protocol: 1488db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1489db8dac20SDavid S. Miller goto out; 1490db8dac20SDavid S. Miller } 1491db8dac20SDavid S. Miller 1492db8dac20SDavid S. Miller void udpv6_exit(void) 1493db8dac20SDavid S. Miller { 1494db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1495db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1496db8dac20SDavid S. Miller } 1497