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> 387c0f6ba6SLinus Torvalds #include <linux/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> 490bd84065Ssubashab@codeaurora.org #include <net/inet_hashtables.h> 5072289b96STom Herbert #include <net/inet6_hashtables.h> 51076bb0c8SEliezer Tamir #include <net/busy_poll.h> 52e32ea7e7SCraig Gallek #include <net/sock_reuseport.h> 53db8dac20SDavid S. Miller 54db8dac20SDavid S. Miller #include <linux/proc_fs.h> 55db8dac20SDavid S. Miller #include <linux/seq_file.h> 5622911fc5SEric Dumazet #include <trace/events/skb.h> 57db8dac20SDavid S. Miller #include "udp_impl.h" 58db8dac20SDavid S. Miller 5963a6fff3SRobert Shearman static bool udp6_lib_exact_dif_match(struct net *net, struct sk_buff *skb) 6063a6fff3SRobert Shearman { 6163a6fff3SRobert Shearman #if defined(CONFIG_NET_L3_MASTER_DEV) 6263a6fff3SRobert Shearman if (!net->ipv4.sysctl_udp_l3mdev_accept && 6363a6fff3SRobert Shearman skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) 6463a6fff3SRobert Shearman return true; 6563a6fff3SRobert Shearman #endif 6663a6fff3SRobert Shearman return false; 6763a6fff3SRobert Shearman } 6863a6fff3SRobert Shearman 696eada011SEric Dumazet static u32 udp6_ehashfn(const struct net *net, 70b50026b5SHannes Frederic Sowa const struct in6_addr *laddr, 71b50026b5SHannes Frederic Sowa const u16 lport, 72b50026b5SHannes Frederic Sowa const struct in6_addr *faddr, 73b50026b5SHannes Frederic Sowa const __be16 fport) 74b50026b5SHannes Frederic Sowa { 751bbdceefSHannes Frederic Sowa static u32 udp6_ehash_secret __read_mostly; 761bbdceefSHannes Frederic Sowa static u32 udp_ipv6_hash_secret __read_mostly; 771bbdceefSHannes Frederic Sowa 781bbdceefSHannes Frederic Sowa u32 lhash, fhash; 791bbdceefSHannes Frederic Sowa 801bbdceefSHannes Frederic Sowa net_get_random_once(&udp6_ehash_secret, 811bbdceefSHannes Frederic Sowa sizeof(udp6_ehash_secret)); 821bbdceefSHannes Frederic Sowa net_get_random_once(&udp_ipv6_hash_secret, 831bbdceefSHannes Frederic Sowa sizeof(udp_ipv6_hash_secret)); 841bbdceefSHannes Frederic Sowa 851bbdceefSHannes Frederic Sowa lhash = (__force u32)laddr->s6_addr32[3]; 861bbdceefSHannes Frederic Sowa fhash = __ipv6_addr_jhash(faddr, udp_ipv6_hash_secret); 871bbdceefSHannes Frederic Sowa 88b50026b5SHannes Frederic Sowa return __inet6_ehashfn(lhash, lport, fhash, fport, 891bbdceefSHannes Frederic Sowa udp_ipv6_hash_secret + net_hash_mix(net)); 90b50026b5SHannes Frederic Sowa } 91b50026b5SHannes Frederic Sowa 926ba5a3c5SPavel Emelyanov int udp_v6_get_port(struct sock *sk, unsigned short snum) 93db8dac20SDavid S. Miller { 9430fff923SEric Dumazet unsigned int hash2_nulladdr = 95f0b1e64cSMartin KaFai Lau ipv6_portaddr_hash(sock_net(sk), &in6addr_any, snum); 9630fff923SEric Dumazet unsigned int hash2_partial = 97f0b1e64cSMartin KaFai Lau ipv6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0); 9830fff923SEric Dumazet 99d4cada4aSEric Dumazet /* precompute partial secondary hash */ 10030fff923SEric Dumazet udp_sk(sk)->udp_portaddr_hash = hash2_partial; 101fe38d2a1SJosef Bacik return udp_lib_get_port(sk, snum, hash2_nulladdr); 102db8dac20SDavid S. Miller } 103db8dac20SDavid S. Miller 104719f8358SEric Dumazet static void udp_v6_rehash(struct sock *sk) 105719f8358SEric Dumazet { 106f0b1e64cSMartin KaFai Lau u16 new_hash = ipv6_portaddr_hash(sock_net(sk), 107efe4208fSEric Dumazet &sk->sk_v6_rcv_saddr, 108719f8358SEric Dumazet inet_sk(sk)->inet_num); 109719f8358SEric Dumazet 110719f8358SEric Dumazet udp_lib_rehash(sk, new_hash); 111719f8358SEric Dumazet } 112719f8358SEric Dumazet 113d1e37288SSu, Xuemin static int compute_score(struct sock *sk, struct net *net, 11488440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 115d1e37288SSu, Xuemin const struct in6_addr *daddr, unsigned short hnum, 1161801b570SDavid Ahern int dif, int sdif, bool exact_dif) 117db8dac20SDavid S. Miller { 11860c04aecSJoe Perches int score; 11960c04aecSJoe Perches struct inet_sock *inet; 120db8dac20SDavid S. Miller 12160c04aecSJoe Perches if (!net_eq(sock_net(sk), net) || 12260c04aecSJoe Perches udp_sk(sk)->udp_port_hash != hnum || 12360c04aecSJoe Perches sk->sk_family != PF_INET6) 12460c04aecSJoe Perches return -1; 125645ca708SEric Dumazet 126645ca708SEric Dumazet score = 0; 12760c04aecSJoe Perches inet = inet_sk(sk); 12860c04aecSJoe Perches 129c720c7e8SEric Dumazet if (inet->inet_dport) { 130c720c7e8SEric Dumazet if (inet->inet_dport != sport) 131645ca708SEric Dumazet return -1; 132db8dac20SDavid S. Miller score++; 133db8dac20SDavid S. Miller } 13460c04aecSJoe Perches 135efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { 136efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) 137645ca708SEric Dumazet return -1; 138db8dac20SDavid S. Miller score++; 139db8dac20SDavid S. Miller } 14060c04aecSJoe Perches 141efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 142efe4208fSEric Dumazet if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) 143645ca708SEric Dumazet return -1; 144db8dac20SDavid S. Miller score++; 145db8dac20SDavid S. Miller } 14660c04aecSJoe Perches 14763a6fff3SRobert Shearman if (sk->sk_bound_dev_if || exact_dif) { 1481801b570SDavid Ahern bool dev_match = (sk->sk_bound_dev_if == dif || 1491801b570SDavid Ahern sk->sk_bound_dev_if == sdif); 1501801b570SDavid Ahern 1511801b570SDavid Ahern if (exact_dif && !dev_match) 152645ca708SEric Dumazet return -1; 1531801b570SDavid Ahern if (sk->sk_bound_dev_if && dev_match) 154db8dac20SDavid S. Miller score++; 155db8dac20SDavid S. Miller } 15660c04aecSJoe Perches 15770da268bSEric Dumazet if (sk->sk_incoming_cpu == raw_smp_processor_id()) 15870da268bSEric Dumazet score++; 15970da268bSEric Dumazet 160645ca708SEric Dumazet return score; 161645ca708SEric Dumazet } 162645ca708SEric Dumazet 163d1e37288SSu, Xuemin /* called with rcu_read_lock() */ 164fddc17deSEric Dumazet static struct sock *udp6_lib_lookup2(struct net *net, 165fddc17deSEric Dumazet const struct in6_addr *saddr, __be16 sport, 1661801b570SDavid Ahern const struct in6_addr *daddr, unsigned int hnum, 1671801b570SDavid Ahern int dif, int sdif, bool exact_dif, 1681801b570SDavid Ahern struct udp_hslot *hslot2, struct sk_buff *skb) 169fddc17deSEric Dumazet { 170fddc17deSEric Dumazet struct sock *sk, *result; 171e94a62f5SPaolo Abeni int score, badness; 17272289b96STom Herbert u32 hash = 0; 173fddc17deSEric Dumazet 174fddc17deSEric Dumazet result = NULL; 175fddc17deSEric Dumazet badness = -1; 176ca065d0cSEric Dumazet udp_portaddr_for_each_entry_rcu(sk, &hslot2->head) { 177d1e37288SSu, Xuemin score = compute_score(sk, net, saddr, sport, 1781801b570SDavid Ahern daddr, hnum, dif, sdif, exact_dif); 179fddc17deSEric Dumazet if (score > badness) { 180e94a62f5SPaolo Abeni if (sk->sk_reuseport) { 181b50026b5SHannes Frederic Sowa hash = udp6_ehashfn(net, daddr, hnum, 18272289b96STom Herbert saddr, sport); 183ed0dfffdSEric Dumazet 184ca065d0cSEric Dumazet result = reuseport_select_sock(sk, hash, skb, 1851134158bSCraig Gallek sizeof(struct udphdr)); 186ca065d0cSEric Dumazet if (result) 187ca065d0cSEric Dumazet return result; 18870da268bSEric Dumazet } 189ca065d0cSEric Dumazet result = sk; 190ca065d0cSEric Dumazet badness = score; 191fddc17deSEric Dumazet } 192fddc17deSEric Dumazet } 193fddc17deSEric Dumazet return result; 194fddc17deSEric Dumazet } 195fddc17deSEric Dumazet 196ca065d0cSEric Dumazet /* rcu_read_lock() must be held */ 197fce82338SPavel Emelyanov struct sock *__udp6_lib_lookup(struct net *net, 19888440ae7SBalazs Scheidler const struct in6_addr *saddr, __be16 sport, 19988440ae7SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, 2001801b570SDavid Ahern int dif, int sdif, struct udp_table *udptable, 201538950a1SCraig Gallek struct sk_buff *skb) 202645ca708SEric Dumazet { 203271b72c7SEric Dumazet struct sock *sk, *result; 204645ca708SEric Dumazet unsigned short hnum = ntohs(dport); 205fddc17deSEric Dumazet unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); 206fddc17deSEric Dumazet struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; 20763a6fff3SRobert Shearman bool exact_dif = udp6_lib_exact_dif_match(net, skb); 208e94a62f5SPaolo Abeni int score, badness; 20972289b96STom Herbert u32 hash = 0; 210645ca708SEric Dumazet 211fddc17deSEric Dumazet if (hslot->count > 10) { 212f0b1e64cSMartin KaFai Lau hash2 = ipv6_portaddr_hash(net, daddr, hnum); 213fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 214fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 215fddc17deSEric Dumazet if (hslot->count < hslot2->count) 216fddc17deSEric Dumazet goto begin; 217fddc17deSEric Dumazet 218fddc17deSEric Dumazet result = udp6_lib_lookup2(net, saddr, sport, 2191801b570SDavid Ahern daddr, hnum, dif, sdif, exact_dif, 220d1e37288SSu, Xuemin hslot2, skb); 221fddc17deSEric Dumazet if (!result) { 222d1e37288SSu, Xuemin unsigned int old_slot2 = slot2; 223f0b1e64cSMartin KaFai Lau hash2 = ipv6_portaddr_hash(net, &in6addr_any, hnum); 224fddc17deSEric Dumazet slot2 = hash2 & udptable->mask; 225d1e37288SSu, Xuemin /* avoid searching the same slot again. */ 226d1e37288SSu, Xuemin if (unlikely(slot2 == old_slot2)) 227d1e37288SSu, Xuemin return result; 228d1e37288SSu, Xuemin 229fddc17deSEric Dumazet hslot2 = &udptable->hash2[slot2]; 230fddc17deSEric Dumazet if (hslot->count < hslot2->count) 231fddc17deSEric Dumazet goto begin; 232fddc17deSEric Dumazet 2331223c67cSJorge Boncompte [DTI2] result = udp6_lib_lookup2(net, saddr, sport, 2341801b570SDavid Ahern daddr, hnum, dif, sdif, 23563a6fff3SRobert Shearman exact_dif, hslot2, 23663a6fff3SRobert Shearman skb); 237fddc17deSEric Dumazet } 238fddc17deSEric Dumazet return result; 239fddc17deSEric Dumazet } 240271b72c7SEric Dumazet begin: 241271b72c7SEric Dumazet result = NULL; 242271b72c7SEric Dumazet badness = -1; 243ca065d0cSEric Dumazet sk_for_each_rcu(sk, &hslot->head) { 24463a6fff3SRobert Shearman score = compute_score(sk, net, saddr, sport, daddr, hnum, dif, 2451801b570SDavid Ahern sdif, exact_dif); 246645ca708SEric Dumazet if (score > badness) { 247e94a62f5SPaolo Abeni if (sk->sk_reuseport) { 248b50026b5SHannes Frederic Sowa hash = udp6_ehashfn(net, daddr, hnum, 24972289b96STom Herbert saddr, sport); 250ca065d0cSEric Dumazet result = reuseport_select_sock(sk, hash, skb, 251538950a1SCraig Gallek sizeof(struct udphdr)); 252ca065d0cSEric Dumazet if (result) 253ca065d0cSEric Dumazet return result; 25472289b96STom Herbert } 255ca065d0cSEric Dumazet result = sk; 256ca065d0cSEric Dumazet badness = score; 257db8dac20SDavid S. Miller } 258db8dac20SDavid S. Miller } 259db8dac20SDavid S. Miller return result; 260db8dac20SDavid S. Miller } 261fce82338SPavel Emelyanov EXPORT_SYMBOL_GPL(__udp6_lib_lookup); 262db8dac20SDavid S. Miller 263607c4aafSKOVACS Krisztian static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, 264607c4aafSKOVACS Krisztian __be16 sport, __be16 dport, 265645ca708SEric Dumazet struct udp_table *udptable) 266607c4aafSKOVACS Krisztian { 267b71d1d42SEric Dumazet const struct ipv6hdr *iph = ipv6_hdr(skb); 268607c4aafSKOVACS Krisztian 269ed7cbbceSAlexander Duyck return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport, 270607c4aafSKOVACS Krisztian &iph->daddr, dport, inet6_iif(skb), 2711801b570SDavid Ahern inet6_sdif(skb), udptable, skb); 272607c4aafSKOVACS Krisztian } 273607c4aafSKOVACS Krisztian 27463058308STom Herbert struct sock *udp6_lib_lookup_skb(struct sk_buff *skb, 27563058308STom Herbert __be16 sport, __be16 dport) 27663058308STom Herbert { 27763058308STom Herbert const struct ipv6hdr *iph = ipv6_hdr(skb); 27863058308STom Herbert 279ed7cbbceSAlexander Duyck return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport, 28063058308STom Herbert &iph->daddr, dport, inet6_iif(skb), 2811801b570SDavid Ahern inet6_sdif(skb), &udp_table, skb); 28263058308STom Herbert } 28363058308STom Herbert EXPORT_SYMBOL_GPL(udp6_lib_lookup_skb); 28463058308STom Herbert 285ca065d0cSEric Dumazet /* Must be called under rcu_read_lock(). 286ca065d0cSEric Dumazet * Does increment socket refcount. 287ca065d0cSEric Dumazet */ 288ca065d0cSEric Dumazet #if IS_ENABLED(CONFIG_NETFILTER_XT_MATCH_SOCKET) || \ 28930f58158SArnd Bergmann IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TPROXY) || \ 29030f58158SArnd Bergmann IS_ENABLED(CONFIG_NF_SOCKET_IPV6) 291aa976fc0SBalazs Scheidler struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, 292aa976fc0SBalazs Scheidler const struct in6_addr *daddr, __be16 dport, int dif) 293aa976fc0SBalazs Scheidler { 294ca065d0cSEric Dumazet struct sock *sk; 295ca065d0cSEric Dumazet 296ca065d0cSEric Dumazet sk = __udp6_lib_lookup(net, saddr, sport, daddr, dport, 2971801b570SDavid Ahern dif, 0, &udp_table, NULL); 29841c6d650SReshetova, Elena if (sk && !refcount_inc_not_zero(&sk->sk_refcnt)) 299ca065d0cSEric Dumazet sk = NULL; 300ca065d0cSEric Dumazet return sk; 301aa976fc0SBalazs Scheidler } 302aa976fc0SBalazs Scheidler EXPORT_SYMBOL_GPL(udp6_lib_lookup); 303ca065d0cSEric Dumazet #endif 304aa976fc0SBalazs Scheidler 305cb891fa6SPaolo Abeni /* do not use the scratch area len for jumbogram: their length execeeds the 306cb891fa6SPaolo Abeni * scratch area space; note that the IP6CB flags is still in the first 307cb891fa6SPaolo Abeni * cacheline, so checking for jumbograms is cheap 308cb891fa6SPaolo Abeni */ 309cb891fa6SPaolo Abeni static int udp6_skb_len(struct sk_buff *skb) 310cb891fa6SPaolo Abeni { 311cb891fa6SPaolo Abeni return unlikely(inet6_is_jumbogram(skb)) ? skb->len : udp_skb_len(skb); 312cb891fa6SPaolo Abeni } 313cb891fa6SPaolo Abeni 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 3191b784140SYing Xue int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 320db8dac20SDavid S. Miller int noblock, int flags, int *addr_len) 321db8dac20SDavid S. Miller { 322db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 323db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 324db8dac20SDavid S. Miller struct sk_buff *skb; 32559c2cdaeSDavid S. Miller unsigned int ulen, copied; 326627d2d6bSsamanthakumar int peeked, peeking, off; 327db8dac20SDavid S. Miller int err; 328db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 329197c949eSEric Dumazet bool checksum_valid = false; 330f26ba175SWei Yongjun int is_udp4; 331db8dac20SDavid S. Miller 332db8dac20SDavid S. Miller if (flags & MSG_ERRQUEUE) 33385fbaa75SHannes Frederic Sowa return ipv6_recv_error(sk, msg, len, addr_len); 334db8dac20SDavid S. Miller 3354b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 33685fbaa75SHannes Frederic Sowa return ipv6_recv_rxpmtu(sk, msg, len, addr_len); 3374b340ae2SBrian Haley 338db8dac20SDavid S. Miller try_again: 339a0917e0bSMatthew Dawson peeking = flags & MSG_PEEK; 340a0917e0bSMatthew Dawson off = sk_peek_offset(sk, flags); 3417c13f97fSPaolo Abeni skb = __skb_recv_udp(sk, flags, noblock, &peeked, &off, &err); 342db8dac20SDavid S. Miller if (!skb) 343627d2d6bSsamanthakumar return err; 344db8dac20SDavid S. Miller 345cb891fa6SPaolo Abeni ulen = udp6_skb_len(skb); 34659c2cdaeSDavid S. Miller copied = len; 347627d2d6bSsamanthakumar if (copied > ulen - off) 348627d2d6bSsamanthakumar copied = ulen - off; 34959c2cdaeSDavid S. Miller else if (copied < ulen) 350db8dac20SDavid S. Miller msg->msg_flags |= MSG_TRUNC; 351db8dac20SDavid S. Miller 352f26ba175SWei Yongjun is_udp4 = (skb->protocol == htons(ETH_P_IP)); 353f26ba175SWei Yongjun 354db8dac20SDavid S. Miller /* 355db8dac20SDavid S. Miller * If checksum is needed at all, try to do it while copying the 356db8dac20SDavid S. Miller * data. If the data is truncated, or if we only want a partial 357db8dac20SDavid S. Miller * coverage checksum (UDP-Lite), do it before the copy. 358db8dac20SDavid S. Miller */ 359db8dac20SDavid S. Miller 360d21dbdfeSEric Dumazet if (copied < ulen || peeking || 361d21dbdfeSEric Dumazet (is_udplite && UDP_SKB_CB(skb)->partial_cov)) { 36267a51780SPaolo Abeni checksum_valid = udp_skb_csum_unnecessary(skb) || 36367a51780SPaolo Abeni !__udp_lib_checksum_complete(skb); 364197c949eSEric Dumazet if (!checksum_valid) 365db8dac20SDavid S. Miller goto csum_copy_err; 366db8dac20SDavid S. Miller } 367db8dac20SDavid S. Miller 36867a51780SPaolo Abeni if (checksum_valid || udp_skb_csum_unnecessary(skb)) { 36967a51780SPaolo Abeni if (udp_skb_is_linear(skb)) 37067a51780SPaolo Abeni err = copy_linear_skb(skb, copied, off, &msg->msg_iter); 37167a51780SPaolo Abeni else 372627d2d6bSsamanthakumar err = skb_copy_datagram_msg(skb, off, msg, copied); 37367a51780SPaolo Abeni } else { 374627d2d6bSsamanthakumar err = skb_copy_and_csum_datagram_msg(skb, off, msg); 375db8dac20SDavid S. Miller if (err == -EINVAL) 376db8dac20SDavid S. Miller goto csum_copy_err; 377db8dac20SDavid S. Miller } 37822911fc5SEric Dumazet if (unlikely(err)) { 379979402b1SEric Dumazet if (!peeked) { 380979402b1SEric Dumazet atomic_inc(&sk->sk_drops); 381979402b1SEric Dumazet if (is_udp4) 3826aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, 383979402b1SEric Dumazet is_udplite); 384979402b1SEric Dumazet else 3856aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, 386979402b1SEric Dumazet is_udplite); 387979402b1SEric Dumazet } 388850cbaddSPaolo Abeni kfree_skb(skb); 389627d2d6bSsamanthakumar return err; 39022911fc5SEric Dumazet } 391f26ba175SWei Yongjun if (!peeked) { 392f26ba175SWei Yongjun if (is_udp4) 3936aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, 3946aef70a8SEric Dumazet is_udplite); 395f26ba175SWei Yongjun else 3966aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, 3976aef70a8SEric Dumazet is_udplite); 398f26ba175SWei Yongjun } 399db8dac20SDavid S. Miller 4003b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 401db8dac20SDavid S. Miller 402db8dac20SDavid S. Miller /* Copy the address. */ 403db8dac20SDavid S. Miller if (msg->msg_name) { 404342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 405db8dac20SDavid S. Miller sin6->sin6_family = AF_INET6; 406db8dac20SDavid S. Miller sin6->sin6_port = udp_hdr(skb)->source; 407db8dac20SDavid S. Miller sin6->sin6_flowinfo = 0; 408db8dac20SDavid S. Miller 409842df073SHannes Frederic Sowa if (is_udp4) { 410b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 411b301e82cSBrian Haley &sin6->sin6_addr); 412842df073SHannes Frederic Sowa sin6->sin6_scope_id = 0; 413842df073SHannes Frederic Sowa } else { 4144e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr; 415842df073SHannes Frederic Sowa sin6->sin6_scope_id = 416842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin6->sin6_addr, 4174330487aSDuan Jiong inet6_iif(skb)); 418db8dac20SDavid S. Miller } 419bceaa902SHannes Frederic Sowa *addr_len = sizeof(*sin6); 420db8dac20SDavid S. Miller } 4214b261c75SHannes Frederic Sowa 4224b261c75SHannes Frederic Sowa if (np->rxopt.all) 4234b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 4244b261c75SHannes Frederic Sowa 425f26ba175SWei Yongjun if (is_udp4) { 426db8dac20SDavid S. Miller if (inet->cmsg_flags) 427ad959036SPaolo Abeni ip_cmsg_recv_offset(msg, sk, skb, 42810df8e61SEric Dumazet sizeof(struct udphdr), off); 429db8dac20SDavid S. Miller } else { 430db8dac20SDavid S. Miller if (np->rxopt.all) 4314b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 432db8dac20SDavid S. Miller } 433db8dac20SDavid S. Miller 43459c2cdaeSDavid S. Miller err = copied; 435db8dac20SDavid S. Miller if (flags & MSG_TRUNC) 436db8dac20SDavid S. Miller err = ulen; 437db8dac20SDavid S. Miller 438850cbaddSPaolo Abeni skb_consume_udp(sk, skb, peeking ? -err : err); 439db8dac20SDavid S. Miller return err; 440db8dac20SDavid S. Miller 441db8dac20SDavid S. Miller csum_copy_err: 4422276f58aSPaolo Abeni if (!__sk_queue_drop_skb(sk, &udp_sk(sk)->reader_queue, skb, flags, 4432276f58aSPaolo Abeni udp_skb_destructor)) { 4446a5dc9e5SEric Dumazet if (is_udp4) { 4456aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), 4466a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 4476aef70a8SEric Dumazet UDP_INC_STATS(sock_net(sk), 4480856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4496a5dc9e5SEric Dumazet } else { 4506aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 4516a5dc9e5SEric Dumazet UDP_MIB_CSUMERRORS, is_udplite); 4526aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 4530856f939SWei Yongjun UDP_MIB_INERRORS, is_udplite); 4540856f939SWei Yongjun } 4556a5dc9e5SEric Dumazet } 456850cbaddSPaolo Abeni kfree_skb(skb); 457db8dac20SDavid S. Miller 458beb39db5SEric Dumazet /* starting over for a new packet, but check if we need to yield */ 459beb39db5SEric Dumazet cond_resched(); 4609cfaa8deSXufeng Zhang msg->msg_flags &= ~MSG_TRUNC; 461db8dac20SDavid S. Miller goto try_again; 462db8dac20SDavid S. Miller } 463db8dac20SDavid S. Miller 464db8dac20SDavid S. Miller void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 465d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info, 466645ca708SEric Dumazet struct udp_table *udptable) 467db8dac20SDavid S. Miller { 468db8dac20SDavid S. Miller struct ipv6_pinfo *np; 469b71d1d42SEric Dumazet const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; 470b71d1d42SEric Dumazet const struct in6_addr *saddr = &hdr->saddr; 471b71d1d42SEric Dumazet const struct in6_addr *daddr = &hdr->daddr; 472db8dac20SDavid S. Miller struct udphdr *uh = (struct udphdr *)(skb->data+offset); 473db8dac20SDavid S. Miller struct sock *sk; 474e0d8c1b7SWei Wang int harderr; 475db8dac20SDavid S. Miller int err; 4767304fe46SDuan Jiong struct net *net = dev_net(skb->dev); 477db8dac20SDavid S. Miller 478e32ea7e7SCraig Gallek sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source, 4791801b570SDavid Ahern inet6_iif(skb), 0, udptable, skb); 48063159f29SIan Morris if (!sk) { 481a16292a0SEric Dumazet __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev), 4827304fe46SDuan Jiong ICMP6_MIB_INERRORS); 483db8dac20SDavid S. Miller return; 4847304fe46SDuan Jiong } 485db8dac20SDavid S. Miller 486e0d8c1b7SWei Wang harderr = icmpv6_err_convert(type, code, &err); 487e0d8c1b7SWei Wang np = inet6_sk(sk); 488e0d8c1b7SWei Wang 48993b36cf3SHannes Frederic Sowa if (type == ICMPV6_PKT_TOOBIG) { 49093b36cf3SHannes Frederic Sowa if (!ip6_sk_accept_pmtu(sk)) 49193b36cf3SHannes Frederic Sowa goto out; 49281aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info); 493e0d8c1b7SWei Wang if (np->pmtudisc != IPV6_PMTUDISC_DONT) 494e0d8c1b7SWei Wang harderr = 1; 49593b36cf3SHannes Frederic Sowa } 4961a462d18SDuan Jiong if (type == NDISC_REDIRECT) { 497ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk); 4981a462d18SDuan Jiong goto out; 4991a462d18SDuan Jiong } 50081aded24SDavid S. Miller 501e0d8c1b7SWei Wang if (!np->recverr) { 502e0d8c1b7SWei Wang if (!harderr || sk->sk_state != TCP_ESTABLISHED) 503db8dac20SDavid S. Miller goto out; 504e0d8c1b7SWei Wang } else { 505db8dac20SDavid S. Miller ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); 506e0d8c1b7SWei Wang } 507b1faf566SEric Dumazet 508db8dac20SDavid S. Miller sk->sk_err = err; 509db8dac20SDavid S. Miller sk->sk_error_report(sk); 510db8dac20SDavid S. Miller out: 511ca065d0cSEric Dumazet return; 512db8dac20SDavid S. Miller } 513db8dac20SDavid S. Miller 514a3f96c47SPaolo Abeni static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 515f7ad74feSBenjamin LaHaise { 516f7ad74feSBenjamin LaHaise int rc; 517f7ad74feSBenjamin LaHaise 518efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr)) { 519f7ad74feSBenjamin LaHaise sock_rps_save_rxhash(sk, skb); 520005ec974SShawn Bohrer sk_mark_napi_id(sk, skb); 5212c8c56e1SEric Dumazet sk_incoming_cpu_update(sk); 522e68b6e50SEric Dumazet } else { 523e68b6e50SEric Dumazet sk_mark_napi_id_once(sk, skb); 524005ec974SShawn Bohrer } 525f7ad74feSBenjamin LaHaise 526850cbaddSPaolo Abeni rc = __udp_enqueue_schedule_skb(sk, skb); 527f7ad74feSBenjamin LaHaise if (rc < 0) { 528f7ad74feSBenjamin LaHaise int is_udplite = IS_UDPLITE(sk); 529f7ad74feSBenjamin LaHaise 530f7ad74feSBenjamin LaHaise /* Note that an ENOMEM error is charged twice */ 531f7ad74feSBenjamin LaHaise if (rc == -ENOMEM) 532e61da9e2SEric Dumazet UDP6_INC_STATS(sock_net(sk), 533f7ad74feSBenjamin LaHaise UDP_MIB_RCVBUFERRORS, is_udplite); 534e61da9e2SEric Dumazet UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 535f7ad74feSBenjamin LaHaise kfree_skb(skb); 536f7ad74feSBenjamin LaHaise return -1; 537f7ad74feSBenjamin LaHaise } 538850cbaddSPaolo Abeni 539f7ad74feSBenjamin LaHaise return 0; 540f7ad74feSBenjamin LaHaise } 541f7ad74feSBenjamin LaHaise 542db8dac20SDavid S. Miller static __inline__ void udpv6_err(struct sk_buff *skb, 543d5fdd6baSBrian Haley struct inet6_skb_parm *opt, u8 type, 544d5fdd6baSBrian Haley u8 code, int offset, __be32 info) 545db8dac20SDavid S. Miller { 546645ca708SEric Dumazet __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); 547db8dac20SDavid S. Miller } 548db8dac20SDavid S. Miller 549d7f3f621SBenjamin LaHaise static struct static_key udpv6_encap_needed __read_mostly; 550d7f3f621SBenjamin LaHaise void udpv6_encap_enable(void) 551d7f3f621SBenjamin LaHaise { 5527a34bcb8SPaolo Bonzini static_key_enable(&udpv6_encap_needed); 553d7f3f621SBenjamin LaHaise } 554d7f3f621SBenjamin LaHaise EXPORT_SYMBOL(udpv6_encap_enable); 555d7f3f621SBenjamin LaHaise 556a3f96c47SPaolo Abeni static int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) 557db8dac20SDavid S. Miller { 558db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 559db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 560db8dac20SDavid S. Miller 561db8dac20SDavid S. Miller if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) 562db8dac20SDavid S. Miller goto drop; 563db8dac20SDavid S. Miller 564d7f3f621SBenjamin LaHaise if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 565d7f3f621SBenjamin LaHaise int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); 566d7f3f621SBenjamin LaHaise 567d7f3f621SBenjamin LaHaise /* 568d7f3f621SBenjamin LaHaise * This is an encapsulation socket so pass the skb to 569d7f3f621SBenjamin LaHaise * the socket's udp_encap_rcv() hook. Otherwise, just 570d7f3f621SBenjamin LaHaise * fall through and pass this up the UDP socket. 571d7f3f621SBenjamin LaHaise * up->encap_rcv() returns the following value: 572d7f3f621SBenjamin LaHaise * =0 if skb was successfully passed to the encap 573d7f3f621SBenjamin LaHaise * handler or was discarded by it. 574d7f3f621SBenjamin LaHaise * >0 if skb should be passed on to UDP. 575d7f3f621SBenjamin LaHaise * <0 if skb should be resubmitted as proto -N 576d7f3f621SBenjamin LaHaise */ 577d7f3f621SBenjamin LaHaise 578d7f3f621SBenjamin LaHaise /* if we're overly short, let UDP handle it */ 5796aa7de05SMark Rutland encap_rcv = READ_ONCE(up->encap_rcv); 580e5aed006SHannes Frederic Sowa if (encap_rcv) { 581d7f3f621SBenjamin LaHaise int ret; 582d7f3f621SBenjamin LaHaise 5830a80966bSTom Herbert /* Verify checksum before giving to encap */ 5840a80966bSTom Herbert if (udp_lib_checksum_complete(skb)) 5850a80966bSTom Herbert goto csum_error; 5860a80966bSTom Herbert 587d7f3f621SBenjamin LaHaise ret = encap_rcv(sk, skb); 588d7f3f621SBenjamin LaHaise if (ret <= 0) { 58902c22347SEric Dumazet __UDP_INC_STATS(sock_net(sk), 590d7f3f621SBenjamin LaHaise UDP_MIB_INDATAGRAMS, 591d7f3f621SBenjamin LaHaise is_udplite); 592d7f3f621SBenjamin LaHaise return -ret; 593d7f3f621SBenjamin LaHaise } 594d7f3f621SBenjamin LaHaise } 595d7f3f621SBenjamin LaHaise 596d7f3f621SBenjamin LaHaise /* FALLTHROUGH -- it's a UDP Packet */ 597d7f3f621SBenjamin LaHaise } 598d7f3f621SBenjamin LaHaise 599db8dac20SDavid S. Miller /* 600db8dac20SDavid S. Miller * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). 601db8dac20SDavid S. Miller */ 602db8dac20SDavid S. Miller if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { 603db8dac20SDavid S. Miller 604db8dac20SDavid S. Miller if (up->pcrlen == 0) { /* full coverage was set */ 605ba7a46f1SJoe Perches net_dbg_ratelimited("UDPLITE6: partial coverage %d while full coverage %d requested\n", 606db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, skb->len); 607db8dac20SDavid S. Miller goto drop; 608db8dac20SDavid S. Miller } 609db8dac20SDavid S. Miller if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { 610ba7a46f1SJoe Perches net_dbg_ratelimited("UDPLITE6: coverage %d too small, need min %d\n", 611db8dac20SDavid S. Miller UDP_SKB_CB(skb)->cscov, up->pcrlen); 612db8dac20SDavid S. Miller goto drop; 613db8dac20SDavid S. Miller } 614db8dac20SDavid S. Miller } 615db8dac20SDavid S. Miller 6164b943faeSPaolo Abeni prefetch(&sk->sk_rmem_alloc); 617ce25d66aSEric Dumazet if (rcu_access_pointer(sk->sk_filter) && 618ce25d66aSEric Dumazet udp_lib_checksum_complete(skb)) 6196a5dc9e5SEric Dumazet goto csum_error; 620ce25d66aSEric Dumazet 621ba66bbe5SDaniel Borkmann if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr))) 622a6127697SMichal Kubeček goto drop; 623db8dac20SDavid S. Miller 624e6afc8acSsamanthakumar udp_csum_pull_header(skb); 625cb80ef46SBenjamin LaHaise 626d826eb14SEric Dumazet skb_dst_drop(skb); 627db8dac20SDavid S. Miller 628850cbaddSPaolo Abeni return __udpv6_queue_rcv_skb(sk, skb); 6293e215c8dSJames M Leddy 6306a5dc9e5SEric Dumazet csum_error: 63102c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); 632db8dac20SDavid S. Miller drop: 63302c22347SEric Dumazet __UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); 634cb80ef46SBenjamin LaHaise atomic_inc(&sk->sk_drops); 635db8dac20SDavid S. Miller kfree_skb(skb); 636db8dac20SDavid S. Miller return -1; 637db8dac20SDavid S. Miller } 638db8dac20SDavid S. Miller 6395cf3d461SDavid Held static bool __udp_v6_is_mcast_sock(struct net *net, struct sock *sk, 640b71d1d42SEric Dumazet __be16 loc_port, const struct in6_addr *loc_addr, 641b71d1d42SEric Dumazet __be16 rmt_port, const struct in6_addr *rmt_addr, 6425cf3d461SDavid Held int dif, unsigned short hnum) 643db8dac20SDavid S. Miller { 6449e89fd8bSSven Wegener struct inet_sock *inet = inet_sk(sk); 645db8dac20SDavid S. Miller 6469e89fd8bSSven Wegener if (!net_eq(sock_net(sk), net)) 6475cf3d461SDavid Held return false; 648b8ad0cbcSDaniel Lezcano 6495cf3d461SDavid Held if (udp_sk(sk)->udp_port_hash != hnum || 6505cf3d461SDavid Held sk->sk_family != PF_INET6 || 6515cf3d461SDavid Held (inet->inet_dport && inet->inet_dport != rmt_port) || 6525cf3d461SDavid Held (!ipv6_addr_any(&sk->sk_v6_daddr) && 6535cf3d461SDavid Held !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) || 65433b4b015SHenning Rogge (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) || 65533b4b015SHenning Rogge (!ipv6_addr_any(&sk->sk_v6_rcv_saddr) && 65633b4b015SHenning Rogge !ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))) 6575cf3d461SDavid Held return false; 6589e89fd8bSSven Wegener if (!inet6_mc_check(sk, loc_addr, rmt_addr)) 6595cf3d461SDavid Held return false; 6605cf3d461SDavid Held return true; 661db8dac20SDavid S. Miller } 662db8dac20SDavid S. Miller 6634068579eSTom Herbert static void udp6_csum_zero_error(struct sk_buff *skb) 6644068579eSTom Herbert { 6654068579eSTom Herbert /* RFC 2460 section 8.1 says that we SHOULD log 6664068579eSTom Herbert * this error. Well, it is reasonable. 6674068579eSTom Herbert */ 668ba7a46f1SJoe Perches net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n", 6694068579eSTom Herbert &ipv6_hdr(skb)->saddr, ntohs(udp_hdr(skb)->source), 6704068579eSTom Herbert &ipv6_hdr(skb)->daddr, ntohs(udp_hdr(skb)->dest)); 6714068579eSTom Herbert } 6724068579eSTom Herbert 673db8dac20SDavid S. Miller /* 674db8dac20SDavid S. Miller * Note: called only from the BH handler context, 675db8dac20SDavid S. Miller * so we don't need to lock the hashes. 676db8dac20SDavid S. Miller */ 677e3163493SPavel Emelyanov static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, 678b71d1d42SEric Dumazet const struct in6_addr *saddr, const struct in6_addr *daddr, 67936cbb245SRick Jones struct udp_table *udptable, int proto) 680db8dac20SDavid S. Miller { 681ca065d0cSEric Dumazet struct sock *sk, *first = NULL; 682db8dac20SDavid S. Miller const struct udphdr *uh = udp_hdr(skb); 6835cf3d461SDavid Held unsigned short hnum = ntohs(uh->dest); 6845cf3d461SDavid Held struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum); 685ca065d0cSEric Dumazet unsigned int offset = offsetof(typeof(*sk), sk_node); 6862dc41cffSDavid Held unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10); 687ca065d0cSEric Dumazet int dif = inet6_iif(skb); 688ca065d0cSEric Dumazet struct hlist_node *node; 689ca065d0cSEric Dumazet struct sk_buff *nskb; 6902dc41cffSDavid Held 6912dc41cffSDavid Held if (use_hash2) { 692f0b1e64cSMartin KaFai Lau hash2_any = ipv6_portaddr_hash(net, &in6addr_any, hnum) & 69373e2d5e3SPablo Neira udptable->mask; 694f0b1e64cSMartin KaFai Lau hash2 = ipv6_portaddr_hash(net, daddr, hnum) & udptable->mask; 6952dc41cffSDavid Held start_lookup: 69673e2d5e3SPablo Neira hslot = &udptable->hash2[hash2]; 6972dc41cffSDavid Held offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node); 6982dc41cffSDavid Held } 699db8dac20SDavid S. Miller 700ca065d0cSEric Dumazet sk_for_each_entry_offset_rcu(sk, node, &hslot->head, offset) { 701ca065d0cSEric Dumazet if (!__udp_v6_is_mcast_sock(net, sk, uh->dest, daddr, 702ca065d0cSEric Dumazet uh->source, saddr, dif, hnum)) 703ca065d0cSEric Dumazet continue; 7041c19448cSTom Herbert /* If zero checksum and no_check is not on for 7054068579eSTom Herbert * the socket then skip it. 7064068579eSTom Herbert */ 707ca065d0cSEric Dumazet if (!uh->check && !udp_sk(sk)->no_check6_rx) 708ca065d0cSEric Dumazet continue; 709ca065d0cSEric Dumazet if (!first) { 710ca065d0cSEric Dumazet first = sk; 711ca065d0cSEric Dumazet continue; 712db8dac20SDavid S. Miller } 713ca065d0cSEric Dumazet nskb = skb_clone(skb, GFP_ATOMIC); 714ca065d0cSEric Dumazet if (unlikely(!nskb)) { 715ca065d0cSEric Dumazet atomic_inc(&sk->sk_drops); 71602c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_RCVBUFERRORS, 717ca065d0cSEric Dumazet IS_UDPLITE(sk)); 71802c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_INERRORS, 719ca065d0cSEric Dumazet IS_UDPLITE(sk)); 720ca065d0cSEric Dumazet continue; 721a1ab77f9SEric Dumazet } 722db8dac20SDavid S. Miller 723ca065d0cSEric Dumazet if (udpv6_queue_rcv_skb(sk, nskb) > 0) 724ca065d0cSEric Dumazet consume_skb(nskb); 725ca065d0cSEric Dumazet } 726a1ab77f9SEric Dumazet 7272dc41cffSDavid Held /* Also lookup *:port if we are using hash2 and haven't done so yet. */ 7282dc41cffSDavid Held if (use_hash2 && hash2 != hash2_any) { 7292dc41cffSDavid Held hash2 = hash2_any; 7302dc41cffSDavid Held goto start_lookup; 7312dc41cffSDavid Held } 7322dc41cffSDavid Held 733ca065d0cSEric Dumazet if (first) { 734ca065d0cSEric Dumazet if (udpv6_queue_rcv_skb(first, skb) > 0) 735ca065d0cSEric Dumazet consume_skb(skb); 736a1ab77f9SEric Dumazet } else { 737ca065d0cSEric Dumazet kfree_skb(skb); 73802c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_IGNOREDMULTI, 73936cbb245SRick Jones proto == IPPROTO_UDPLITE); 740a1ab77f9SEric Dumazet } 741db8dac20SDavid S. Miller return 0; 742db8dac20SDavid S. Miller } 743db8dac20SDavid S. Miller 74464f0f5d1SPaolo Abeni static void udp6_sk_rx_dst_set(struct sock *sk, struct dst_entry *dst) 74564f0f5d1SPaolo Abeni { 74664f0f5d1SPaolo Abeni if (udp_sk_rx_dst_set(sk, dst)) { 74764f0f5d1SPaolo Abeni const struct rt6_info *rt = (const struct rt6_info *)dst; 74864f0f5d1SPaolo Abeni 74964f0f5d1SPaolo Abeni inet6_sk(sk)->rx_dst_cookie = rt6_get_cookie(rt); 75064f0f5d1SPaolo Abeni } 75164f0f5d1SPaolo Abeni } 75264f0f5d1SPaolo Abeni 753645ca708SEric Dumazet int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, 754db8dac20SDavid S. Miller int proto) 755db8dac20SDavid S. Miller { 756b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 757ca065d0cSEric Dumazet struct net *net = dev_net(skb->dev); 758ca065d0cSEric Dumazet struct udphdr *uh; 759ca065d0cSEric Dumazet struct sock *sk; 760db8dac20SDavid S. Miller u32 ulen = 0; 761db8dac20SDavid S. Miller 762db8dac20SDavid S. Miller if (!pskb_may_pull(skb, sizeof(struct udphdr))) 763d6bc0149SBjørn Mork goto discard; 764db8dac20SDavid S. Miller 765db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 766db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 767db8dac20SDavid S. Miller uh = udp_hdr(skb); 768db8dac20SDavid S. Miller 769db8dac20SDavid S. Miller ulen = ntohs(uh->len); 770db8dac20SDavid S. Miller if (ulen > skb->len) 771db8dac20SDavid S. Miller goto short_packet; 772db8dac20SDavid S. Miller 773db8dac20SDavid S. Miller if (proto == IPPROTO_UDP) { 774db8dac20SDavid S. Miller /* UDP validates ulen. */ 775db8dac20SDavid S. Miller 776db8dac20SDavid S. Miller /* Check for jumbo payload */ 777db8dac20SDavid S. Miller if (ulen == 0) 778db8dac20SDavid S. Miller ulen = skb->len; 779db8dac20SDavid S. Miller 780db8dac20SDavid S. Miller if (ulen < sizeof(*uh)) 781db8dac20SDavid S. Miller goto short_packet; 782db8dac20SDavid S. Miller 783db8dac20SDavid S. Miller if (ulen < skb->len) { 784db8dac20SDavid S. Miller if (pskb_trim_rcsum(skb, ulen)) 785db8dac20SDavid S. Miller goto short_packet; 786db8dac20SDavid S. Miller saddr = &ipv6_hdr(skb)->saddr; 787db8dac20SDavid S. Miller daddr = &ipv6_hdr(skb)->daddr; 788db8dac20SDavid S. Miller uh = udp_hdr(skb); 789db8dac20SDavid S. Miller } 790db8dac20SDavid S. Miller } 791db8dac20SDavid S. Miller 792db8dac20SDavid S. Miller if (udp6_csum_init(skb, uh, proto)) 7936a5dc9e5SEric Dumazet goto csum_error; 794db8dac20SDavid S. Miller 795c9f2c1aeSPaolo Abeni /* Check if the socket is already available, e.g. due to early demux */ 796c9f2c1aeSPaolo Abeni sk = skb_steal_sock(skb); 797c9f2c1aeSPaolo Abeni if (sk) { 798c9f2c1aeSPaolo Abeni struct dst_entry *dst = skb_dst(skb); 799c9f2c1aeSPaolo Abeni int ret; 800c9f2c1aeSPaolo Abeni 801c9f2c1aeSPaolo Abeni if (unlikely(sk->sk_rx_dst != dst)) 80264f0f5d1SPaolo Abeni udp6_sk_rx_dst_set(sk, dst); 803c9f2c1aeSPaolo Abeni 804c9f2c1aeSPaolo Abeni ret = udpv6_queue_rcv_skb(sk, skb); 805c9f2c1aeSPaolo Abeni sock_put(sk); 806c9f2c1aeSPaolo Abeni 807c9f2c1aeSPaolo Abeni /* a return value > 0 means to resubmit the input */ 808c9f2c1aeSPaolo Abeni if (ret > 0) 809c9f2c1aeSPaolo Abeni return ret; 810c9f2c1aeSPaolo Abeni return 0; 811c9f2c1aeSPaolo Abeni } 812c9f2c1aeSPaolo Abeni 813db8dac20SDavid S. Miller /* 814db8dac20SDavid S. Miller * Multicast receive code 815db8dac20SDavid S. Miller */ 816db8dac20SDavid S. Miller if (ipv6_addr_is_multicast(daddr)) 817e3163493SPavel Emelyanov return __udp6_lib_mcast_deliver(net, skb, 81836cbb245SRick Jones saddr, daddr, udptable, proto); 819db8dac20SDavid S. Miller 820db8dac20SDavid S. Miller /* Unicast */ 821607c4aafSKOVACS Krisztian sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); 82253b24b8fSIan Morris if (sk) { 823a5b50476SEliezer Tamir int ret; 824a5b50476SEliezer Tamir 8251c19448cSTom Herbert if (!uh->check && !udp_sk(sk)->no_check6_rx) { 8264068579eSTom Herbert udp6_csum_zero_error(skb); 8274068579eSTom Herbert goto csum_error; 8284068579eSTom Herbert } 8294068579eSTom Herbert 830224d019cSTom Herbert if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk)) 8312abb7cdcSTom Herbert skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check, 8322abb7cdcSTom Herbert ip6_compute_pseudo); 8332abb7cdcSTom Herbert 834a5b50476SEliezer Tamir ret = udpv6_queue_rcv_skb(sk, skb); 835db8dac20SDavid S. Miller 83659dca1d8SBill Sommerfeld /* a return value > 0 means to resubmit the input */ 837cb80ef46SBenjamin LaHaise if (ret > 0) 83859dca1d8SBill Sommerfeld return ret; 839cb80ef46SBenjamin LaHaise 840cb80ef46SBenjamin LaHaise return 0; 841cb80ef46SBenjamin LaHaise } 842cb80ef46SBenjamin LaHaise 8434068579eSTom Herbert if (!uh->check) { 8444068579eSTom Herbert udp6_csum_zero_error(skb); 8454068579eSTom Herbert goto csum_error; 8464068579eSTom Herbert } 8474068579eSTom Herbert 848db8dac20SDavid S. Miller if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 849db8dac20SDavid S. Miller goto discard; 850db8dac20SDavid S. Miller 851db8dac20SDavid S. Miller if (udp_lib_checksum_complete(skb)) 8526a5dc9e5SEric Dumazet goto csum_error; 853db8dac20SDavid S. Miller 85402c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); 8553ffe533cSAlexey Dobriyan icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); 856db8dac20SDavid S. Miller 857db8dac20SDavid S. Miller kfree_skb(skb); 858db8dac20SDavid S. Miller return 0; 859db8dac20SDavid S. Miller 860db8dac20SDavid S. Miller short_packet: 861ba7a46f1SJoe Perches net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", 862db8dac20SDavid S. Miller proto == IPPROTO_UDPLITE ? "-Lite" : "", 863ba7a46f1SJoe Perches saddr, ntohs(uh->source), 864ba7a46f1SJoe Perches ulen, skb->len, 865ba7a46f1SJoe Perches daddr, ntohs(uh->dest)); 8666a5dc9e5SEric Dumazet goto discard; 8676a5dc9e5SEric Dumazet csum_error: 86802c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); 869db8dac20SDavid S. Miller discard: 87002c22347SEric Dumazet __UDP6_INC_STATS(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); 871db8dac20SDavid S. Miller kfree_skb(skb); 872db8dac20SDavid S. Miller return 0; 873db8dac20SDavid S. Miller } 874db8dac20SDavid S. Miller 8750bd84065Ssubashab@codeaurora.org 8765425077dSsubashab@codeaurora.org static struct sock *__udp6_lib_demux_lookup(struct net *net, 8775425077dSsubashab@codeaurora.org __be16 loc_port, const struct in6_addr *loc_addr, 8785425077dSsubashab@codeaurora.org __be16 rmt_port, const struct in6_addr *rmt_addr, 8794297a0efSDavid Ahern int dif, int sdif) 8805425077dSsubashab@codeaurora.org { 8810bd84065Ssubashab@codeaurora.org unsigned short hnum = ntohs(loc_port); 882f0b1e64cSMartin KaFai Lau unsigned int hash2 = ipv6_portaddr_hash(net, loc_addr, hnum); 8830bd84065Ssubashab@codeaurora.org unsigned int slot2 = hash2 & udp_table.mask; 8840bd84065Ssubashab@codeaurora.org struct udp_hslot *hslot2 = &udp_table.hash2[slot2]; 8850bd84065Ssubashab@codeaurora.org const __portpair ports = INET_COMBINED_PORTS(rmt_port, hnum); 8865425077dSsubashab@codeaurora.org struct sock *sk; 8875425077dSsubashab@codeaurora.org 8880bd84065Ssubashab@codeaurora.org udp_portaddr_for_each_entry_rcu(sk, &hslot2->head) { 88985cb73ffSWei Wang if (sk->sk_state == TCP_ESTABLISHED && 8904297a0efSDavid Ahern INET6_MATCH(sk, net, rmt_addr, loc_addr, ports, dif, sdif)) 8915425077dSsubashab@codeaurora.org return sk; 8920bd84065Ssubashab@codeaurora.org /* Only check first socket in chain */ 8930bd84065Ssubashab@codeaurora.org break; 8940bd84065Ssubashab@codeaurora.org } 8950bd84065Ssubashab@codeaurora.org return NULL; 8965425077dSsubashab@codeaurora.org } 8975425077dSsubashab@codeaurora.org 8985425077dSsubashab@codeaurora.org static void udp_v6_early_demux(struct sk_buff *skb) 8995425077dSsubashab@codeaurora.org { 9005425077dSsubashab@codeaurora.org struct net *net = dev_net(skb->dev); 9015425077dSsubashab@codeaurora.org const struct udphdr *uh; 9025425077dSsubashab@codeaurora.org struct sock *sk; 9035425077dSsubashab@codeaurora.org struct dst_entry *dst; 9045425077dSsubashab@codeaurora.org int dif = skb->dev->ifindex; 9054297a0efSDavid Ahern int sdif = inet6_sdif(skb); 9065425077dSsubashab@codeaurora.org 9075425077dSsubashab@codeaurora.org if (!pskb_may_pull(skb, skb_transport_offset(skb) + 9085425077dSsubashab@codeaurora.org sizeof(struct udphdr))) 9095425077dSsubashab@codeaurora.org return; 9105425077dSsubashab@codeaurora.org 9115425077dSsubashab@codeaurora.org uh = udp_hdr(skb); 9125425077dSsubashab@codeaurora.org 9135425077dSsubashab@codeaurora.org if (skb->pkt_type == PACKET_HOST) 9145425077dSsubashab@codeaurora.org sk = __udp6_lib_demux_lookup(net, uh->dest, 9155425077dSsubashab@codeaurora.org &ipv6_hdr(skb)->daddr, 9165425077dSsubashab@codeaurora.org uh->source, &ipv6_hdr(skb)->saddr, 9174297a0efSDavid Ahern dif, sdif); 9185425077dSsubashab@codeaurora.org else 9195425077dSsubashab@codeaurora.org return; 9205425077dSsubashab@codeaurora.org 92141c6d650SReshetova, Elena if (!sk || !refcount_inc_not_zero(&sk->sk_refcnt)) 9225425077dSsubashab@codeaurora.org return; 9235425077dSsubashab@codeaurora.org 9245425077dSsubashab@codeaurora.org skb->sk = sk; 9255425077dSsubashab@codeaurora.org skb->destructor = sock_efree; 9265425077dSsubashab@codeaurora.org dst = READ_ONCE(sk->sk_rx_dst); 9275425077dSsubashab@codeaurora.org 9285425077dSsubashab@codeaurora.org if (dst) 9295425077dSsubashab@codeaurora.org dst = dst_check(dst, inet6_sk(sk)->rx_dst_cookie); 9305425077dSsubashab@codeaurora.org if (dst) { 931d24406c8SWei Wang /* set noref for now. 932d24406c8SWei Wang * any place which wants to hold dst has to call 933d24406c8SWei Wang * dst_hold_safe() 934d24406c8SWei Wang */ 9355425077dSsubashab@codeaurora.org skb_dst_set_noref(skb, dst); 9365425077dSsubashab@codeaurora.org } 9375425077dSsubashab@codeaurora.org } 9385425077dSsubashab@codeaurora.org 939db8dac20SDavid S. Miller static __inline__ int udpv6_rcv(struct sk_buff *skb) 940db8dac20SDavid S. Miller { 941645ca708SEric Dumazet return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); 942db8dac20SDavid S. Miller } 943db8dac20SDavid S. Miller 944db8dac20SDavid S. Miller /* 945db8dac20SDavid S. Miller * Throw away all pending data and cancel the corking. Socket is locked. 946db8dac20SDavid S. Miller */ 947db8dac20SDavid S. Miller static void udp_v6_flush_pending_frames(struct sock *sk) 948db8dac20SDavid S. Miller { 949db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 950db8dac20SDavid S. Miller 95136d926b9SDenis V. Lunev if (up->pending == AF_INET) 95236d926b9SDenis V. Lunev udp_flush_pending_frames(sk); 95336d926b9SDenis V. Lunev else if (up->pending) { 954db8dac20SDavid S. Miller up->len = 0; 955db8dac20SDavid S. Miller up->pending = 0; 956db8dac20SDavid S. Miller ip6_flush_pending_frames(sk); 957db8dac20SDavid S. Miller } 958db8dac20SDavid S. Miller } 959db8dac20SDavid S. Miller 960493c6be3SSridhar Samudrala /** 961493c6be3SSridhar Samudrala * udp6_hwcsum_outgoing - handle outgoing HW checksumming 962493c6be3SSridhar Samudrala * @sk: socket we are sending on 963493c6be3SSridhar Samudrala * @skb: sk_buff containing the filled-in UDP header 964493c6be3SSridhar Samudrala * (checksum field must be zeroed out) 965493c6be3SSridhar Samudrala */ 966493c6be3SSridhar Samudrala static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, 967493c6be3SSridhar Samudrala const struct in6_addr *saddr, 968493c6be3SSridhar Samudrala const struct in6_addr *daddr, int len) 969493c6be3SSridhar Samudrala { 970493c6be3SSridhar Samudrala unsigned int offset; 971493c6be3SSridhar Samudrala struct udphdr *uh = udp_hdr(skb); 972d39d938cSVlad Yasevich struct sk_buff *frags = skb_shinfo(skb)->frag_list; 973493c6be3SSridhar Samudrala __wsum csum = 0; 974493c6be3SSridhar Samudrala 975d39d938cSVlad Yasevich if (!frags) { 976493c6be3SSridhar Samudrala /* Only one fragment on the socket. */ 977493c6be3SSridhar Samudrala skb->csum_start = skb_transport_header(skb) - skb->head; 978493c6be3SSridhar Samudrala skb->csum_offset = offsetof(struct udphdr, check); 979493c6be3SSridhar Samudrala uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); 980493c6be3SSridhar Samudrala } else { 981493c6be3SSridhar Samudrala /* 982493c6be3SSridhar Samudrala * HW-checksum won't work as there are two or more 983493c6be3SSridhar Samudrala * fragments on the socket so that all csums of sk_buffs 984493c6be3SSridhar Samudrala * should be together 985493c6be3SSridhar Samudrala */ 986493c6be3SSridhar Samudrala offset = skb_transport_offset(skb); 987493c6be3SSridhar Samudrala skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); 98863ecc3d9SSubash Abhinov Kasiviswanathan csum = skb->csum; 989493c6be3SSridhar Samudrala 990493c6be3SSridhar Samudrala skb->ip_summed = CHECKSUM_NONE; 991493c6be3SSridhar Samudrala 992d39d938cSVlad Yasevich do { 993d39d938cSVlad Yasevich csum = csum_add(csum, frags->csum); 994d39d938cSVlad Yasevich } while ((frags = frags->next)); 995493c6be3SSridhar Samudrala 996493c6be3SSridhar Samudrala uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 997493c6be3SSridhar Samudrala csum); 998493c6be3SSridhar Samudrala if (uh->check == 0) 999493c6be3SSridhar Samudrala uh->check = CSUM_MANGLED_0; 1000493c6be3SSridhar Samudrala } 1001493c6be3SSridhar Samudrala } 1002493c6be3SSridhar Samudrala 1003db8dac20SDavid S. Miller /* 1004db8dac20SDavid S. Miller * Sending 1005db8dac20SDavid S. Miller */ 1006db8dac20SDavid S. Miller 1007d39d938cSVlad Yasevich static int udp_v6_send_skb(struct sk_buff *skb, struct flowi6 *fl6) 1008db8dac20SDavid S. Miller { 1009d39d938cSVlad Yasevich struct sock *sk = skb->sk; 1010db8dac20SDavid S. Miller struct udphdr *uh; 1011db8dac20SDavid S. Miller int err = 0; 1012db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 1013db8dac20SDavid S. Miller __wsum csum = 0; 1014d39d938cSVlad Yasevich int offset = skb_transport_offset(skb); 1015d39d938cSVlad Yasevich int len = skb->len - offset; 1016db8dac20SDavid S. Miller 1017db8dac20SDavid S. Miller /* 1018db8dac20SDavid S. Miller * Create a UDP header 1019db8dac20SDavid S. Miller */ 1020db8dac20SDavid S. Miller uh = udp_hdr(skb); 10211958b856SDavid S. Miller uh->source = fl6->fl6_sport; 10221958b856SDavid S. Miller uh->dest = fl6->fl6_dport; 1023d39d938cSVlad Yasevich uh->len = htons(len); 1024db8dac20SDavid S. Miller uh->check = 0; 1025db8dac20SDavid S. Miller 1026db8dac20SDavid S. Miller if (is_udplite) 1027d39d938cSVlad Yasevich csum = udplite_csum(skb); 1028d39d938cSVlad Yasevich else if (udp_sk(sk)->no_check6_tx) { /* UDP csum disabled */ 10294068579eSTom Herbert skb->ip_summed = CHECKSUM_NONE; 10304068579eSTom Herbert goto send; 10314068579eSTom Herbert } else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ 1032d39d938cSVlad Yasevich udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, len); 1033493c6be3SSridhar Samudrala goto send; 1034493c6be3SSridhar Samudrala } else 1035d39d938cSVlad Yasevich csum = udp_csum(skb); 1036db8dac20SDavid S. Miller 1037db8dac20SDavid S. Miller /* add protocol-dependent pseudo-header */ 10384c9483b2SDavid S. Miller uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 1039d39d938cSVlad Yasevich len, fl6->flowi6_proto, csum); 1040db8dac20SDavid S. Miller if (uh->check == 0) 1041db8dac20SDavid S. Miller uh->check = CSUM_MANGLED_0; 1042db8dac20SDavid S. Miller 1043493c6be3SSridhar Samudrala send: 1044d39d938cSVlad Yasevich err = ip6_send_skb(skb); 10456ce9e7b5SEric Dumazet if (err) { 10466ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { 10476aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 10486ce9e7b5SEric Dumazet UDP_MIB_SNDBUFERRORS, is_udplite); 10496ce9e7b5SEric Dumazet err = 0; 10506ce9e7b5SEric Dumazet } 10516aef70a8SEric Dumazet } else { 10526aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 10536ce9e7b5SEric Dumazet UDP_MIB_OUTDATAGRAMS, is_udplite); 10546aef70a8SEric Dumazet } 1055d39d938cSVlad Yasevich return err; 1056d39d938cSVlad Yasevich } 1057d39d938cSVlad Yasevich 1058d39d938cSVlad Yasevich static int udp_v6_push_pending_frames(struct sock *sk) 1059d39d938cSVlad Yasevich { 1060d39d938cSVlad Yasevich struct sk_buff *skb; 1061d39d938cSVlad Yasevich struct udp_sock *up = udp_sk(sk); 1062d39d938cSVlad Yasevich struct flowi6 fl6; 1063d39d938cSVlad Yasevich int err = 0; 1064d39d938cSVlad Yasevich 1065d39d938cSVlad Yasevich if (up->pending == AF_INET) 1066d39d938cSVlad Yasevich return udp_push_pending_frames(sk); 1067d39d938cSVlad Yasevich 1068d39d938cSVlad Yasevich /* ip6_finish_skb will release the cork, so make a copy of 1069d39d938cSVlad Yasevich * fl6 here. 1070d39d938cSVlad Yasevich */ 1071d39d938cSVlad Yasevich fl6 = inet_sk(sk)->cork.fl.u.ip6; 1072d39d938cSVlad Yasevich 1073d39d938cSVlad Yasevich skb = ip6_finish_skb(sk); 1074d39d938cSVlad Yasevich if (!skb) 1075d39d938cSVlad Yasevich goto out; 1076d39d938cSVlad Yasevich 1077d39d938cSVlad Yasevich err = udp_v6_send_skb(skb, &fl6); 1078d39d938cSVlad Yasevich 1079db8dac20SDavid S. Miller out: 1080db8dac20SDavid S. Miller up->len = 0; 1081db8dac20SDavid S. Miller up->pending = 0; 1082db8dac20SDavid S. Miller return err; 1083db8dac20SDavid S. Miller } 1084db8dac20SDavid S. Miller 10851b784140SYing Xue int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) 1086db8dac20SDavid S. Miller { 1087db8dac20SDavid S. Miller struct ipv6_txoptions opt_space; 1088db8dac20SDavid S. Miller struct udp_sock *up = udp_sk(sk); 1089db8dac20SDavid S. Miller struct inet_sock *inet = inet_sk(sk); 1090db8dac20SDavid S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 1091342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 109220c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 1093db8dac20SDavid S. Miller struct ipv6_txoptions *opt = NULL; 109445f6fad8SEric Dumazet struct ipv6_txoptions *opt_to_free = NULL; 1095db8dac20SDavid S. Miller struct ip6_flowlabel *flowlabel = NULL; 10964c9483b2SDavid S. Miller struct flowi6 fl6; 1097db8dac20SDavid S. Miller struct dst_entry *dst; 109826879da5SWei Wang struct ipcm6_cookie ipc6; 1099db8dac20SDavid S. Miller int addr_len = msg->msg_namelen; 1100db8dac20SDavid S. Miller int ulen = len; 1101db8dac20SDavid S. Miller int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; 1102db8dac20SDavid S. Miller int err; 1103db8dac20SDavid S. Miller int connected = 0; 1104db8dac20SDavid S. Miller int is_udplite = IS_UDPLITE(sk); 1105db8dac20SDavid S. Miller int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); 1106ad1e46a8SSoheil Hassas Yeganeh struct sockcm_cookie sockc; 1107db8dac20SDavid S. Miller 110826879da5SWei Wang ipc6.hlimit = -1; 110926879da5SWei Wang ipc6.tclass = -1; 111026879da5SWei Wang ipc6.dontfrag = -1; 1111d515684dSAlexander Potapenko sockc.tsflags = sk->sk_tsflags; 111226879da5SWei Wang 1113db8dac20SDavid S. Miller /* destination address check */ 1114db8dac20SDavid S. Miller if (sin6) { 1115db8dac20SDavid S. Miller if (addr_len < offsetof(struct sockaddr, sa_data)) 1116db8dac20SDavid S. Miller return -EINVAL; 1117db8dac20SDavid S. Miller 1118db8dac20SDavid S. Miller switch (sin6->sin6_family) { 1119db8dac20SDavid S. Miller case AF_INET6: 1120db8dac20SDavid S. Miller if (addr_len < SIN6_LEN_RFC2133) 1121db8dac20SDavid S. Miller return -EINVAL; 1122db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1123052d2369SJonathan T. Leighton if (ipv6_addr_any(daddr) && 1124052d2369SJonathan T. Leighton ipv6_addr_v4mapped(&np->saddr)) 1125052d2369SJonathan T. Leighton ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), 1126052d2369SJonathan T. Leighton daddr); 1127db8dac20SDavid S. Miller break; 1128db8dac20SDavid S. Miller case AF_INET: 1129db8dac20SDavid S. Miller goto do_udp_sendmsg; 1130db8dac20SDavid S. Miller case AF_UNSPEC: 1131db8dac20SDavid S. Miller msg->msg_name = sin6 = NULL; 1132db8dac20SDavid S. Miller msg->msg_namelen = addr_len = 0; 1133db8dac20SDavid S. Miller daddr = NULL; 1134db8dac20SDavid S. Miller break; 1135db8dac20SDavid S. Miller default: 1136db8dac20SDavid S. Miller return -EINVAL; 1137db8dac20SDavid S. Miller } 1138db8dac20SDavid S. Miller } else if (!up->pending) { 1139db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1140db8dac20SDavid S. Miller return -EDESTADDRREQ; 1141efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1142db8dac20SDavid S. Miller } else 1143db8dac20SDavid S. Miller daddr = NULL; 1144db8dac20SDavid S. Miller 1145db8dac20SDavid S. Miller if (daddr) { 1146db8dac20SDavid S. Miller if (ipv6_addr_v4mapped(daddr)) { 1147db8dac20SDavid S. Miller struct sockaddr_in sin; 1148db8dac20SDavid S. Miller sin.sin_family = AF_INET; 1149c720c7e8SEric Dumazet sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; 1150db8dac20SDavid S. Miller sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1151db8dac20SDavid S. Miller msg->msg_name = &sin; 1152db8dac20SDavid S. Miller msg->msg_namelen = sizeof(sin); 1153db8dac20SDavid S. Miller do_udp_sendmsg: 1154db8dac20SDavid S. Miller if (__ipv6_only_sock(sk)) 1155db8dac20SDavid S. Miller return -ENETUNREACH; 11561b784140SYing Xue return udp_sendmsg(sk, msg, len); 1157db8dac20SDavid S. Miller } 1158db8dac20SDavid S. Miller } 1159db8dac20SDavid S. Miller 1160db8dac20SDavid S. Miller if (up->pending == AF_INET) 11611b784140SYing Xue return udp_sendmsg(sk, msg, len); 1162db8dac20SDavid S. Miller 1163db8dac20SDavid S. Miller /* Rough check on arithmetic overflow, 1164db8dac20SDavid S. Miller better check is made in ip6_append_data(). 1165db8dac20SDavid S. Miller */ 1166db8dac20SDavid S. Miller if (len > INT_MAX - sizeof(struct udphdr)) 1167db8dac20SDavid S. Miller return -EMSGSIZE; 1168db8dac20SDavid S. Miller 116903485f2aSVlad Yasevich getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; 1170db8dac20SDavid S. Miller if (up->pending) { 1171db8dac20SDavid S. Miller /* 1172db8dac20SDavid S. Miller * There are pending frames. 1173db8dac20SDavid S. Miller * The socket lock must be held while it's corked. 1174db8dac20SDavid S. Miller */ 1175db8dac20SDavid S. Miller lock_sock(sk); 1176db8dac20SDavid S. Miller if (likely(up->pending)) { 1177db8dac20SDavid S. Miller if (unlikely(up->pending != AF_INET6)) { 1178db8dac20SDavid S. Miller release_sock(sk); 1179db8dac20SDavid S. Miller return -EAFNOSUPPORT; 1180db8dac20SDavid S. Miller } 1181db8dac20SDavid S. Miller dst = NULL; 1182db8dac20SDavid S. Miller goto do_append_data; 1183db8dac20SDavid S. Miller } 1184db8dac20SDavid S. Miller release_sock(sk); 1185db8dac20SDavid S. Miller } 1186db8dac20SDavid S. Miller ulen += sizeof(struct udphdr); 1187db8dac20SDavid S. Miller 11884c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 1189db8dac20SDavid S. Miller 1190db8dac20SDavid S. Miller if (sin6) { 1191db8dac20SDavid S. Miller if (sin6->sin6_port == 0) 1192db8dac20SDavid S. Miller return -EINVAL; 1193db8dac20SDavid S. Miller 11941958b856SDavid S. Miller fl6.fl6_dport = sin6->sin6_port; 1195db8dac20SDavid S. Miller daddr = &sin6->sin6_addr; 1196db8dac20SDavid S. Miller 1197db8dac20SDavid S. Miller if (np->sndflow) { 11984c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 11994c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 12004c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 120163159f29SIan Morris if (!flowlabel) 1202db8dac20SDavid S. Miller return -EINVAL; 1203db8dac20SDavid S. Miller } 1204db8dac20SDavid S. Miller } 1205db8dac20SDavid S. Miller 1206db8dac20SDavid S. Miller /* 1207db8dac20SDavid S. Miller * Otherwise it will be difficult to maintain 1208db8dac20SDavid S. Miller * sk->sk_dst_cache. 1209db8dac20SDavid S. Miller */ 1210db8dac20SDavid S. Miller if (sk->sk_state == TCP_ESTABLISHED && 1211efe4208fSEric Dumazet ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) 1212efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 1213db8dac20SDavid S. Miller 1214db8dac20SDavid S. Miller if (addr_len >= sizeof(struct sockaddr_in6) && 1215db8dac20SDavid S. Miller sin6->sin6_scope_id && 1216842df073SHannes Frederic Sowa __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) 12174c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 1218db8dac20SDavid S. Miller } else { 1219db8dac20SDavid S. Miller if (sk->sk_state != TCP_ESTABLISHED) 1220db8dac20SDavid S. Miller return -EDESTADDRREQ; 1221db8dac20SDavid S. Miller 12221958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 1223efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 12244c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 1225db8dac20SDavid S. Miller connected = 1; 1226db8dac20SDavid S. Miller } 1227db8dac20SDavid S. Miller 12284c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 12294c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 1230db8dac20SDavid S. Miller 12314c9483b2SDavid S. Miller if (!fl6.flowi6_oif) 12324c9483b2SDavid S. Miller fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 12339f690db7SYang Hongyang 12344c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 1235e2d118a1SLorenzo Colitti fl6.flowi6_uid = sk->sk_uid; 123651953d5bSBrian Haley 1237db8dac20SDavid S. Miller if (msg->msg_controllen) { 1238db8dac20SDavid S. Miller opt = &opt_space; 1239db8dac20SDavid S. Miller memset(opt, 0, sizeof(struct ipv6_txoptions)); 1240db8dac20SDavid S. Miller opt->tot_len = sizeof(*opt); 124126879da5SWei Wang ipc6.opt = opt; 1242db8dac20SDavid S. Miller 124326879da5SWei Wang err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6, &sockc); 1244db8dac20SDavid S. Miller if (err < 0) { 1245db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 1246db8dac20SDavid S. Miller return err; 1247db8dac20SDavid S. Miller } 12484c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 12494c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 125063159f29SIan Morris if (!flowlabel) 1251db8dac20SDavid S. Miller return -EINVAL; 1252db8dac20SDavid S. Miller } 1253db8dac20SDavid S. Miller if (!(opt->opt_nflen|opt->opt_flen)) 1254db8dac20SDavid S. Miller opt = NULL; 1255db8dac20SDavid S. Miller connected = 0; 1256db8dac20SDavid S. Miller } 125745f6fad8SEric Dumazet if (!opt) { 125845f6fad8SEric Dumazet opt = txopt_get(np); 125945f6fad8SEric Dumazet opt_to_free = opt; 126045f6fad8SEric Dumazet } 1261db8dac20SDavid S. Miller if (flowlabel) 1262db8dac20SDavid S. Miller opt = fl6_merge_options(&opt_space, flowlabel, opt); 1263db8dac20SDavid S. Miller opt = ipv6_fixup_options(&opt_space, opt); 126426879da5SWei Wang ipc6.opt = opt; 1265db8dac20SDavid S. Miller 12664c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 1267876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 12684e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr; 1269876c7f41SBrian Haley else 12704c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 12714c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 12724e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 12731958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 1274db8dac20SDavid S. Miller 12754c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 127620c59de2SArnaud Ebalard if (final_p) 1277db8dac20SDavid S. Miller connected = 0; 1278db8dac20SDavid S. Miller 12794c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { 12804c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 1281db8dac20SDavid S. Miller connected = 0; 1282c4062dfcSErich E. Hoover } else if (!fl6.flowi6_oif) 1283c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif; 1284db8dac20SDavid S. Miller 12854c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 1286db8dac20SDavid S. Miller 128738b7097bSHannes Frederic Sowa if (ipc6.tclass < 0) 128838b7097bSHannes Frederic Sowa ipc6.tclass = np->tclass; 128938b7097bSHannes Frederic Sowa 129038b7097bSHannes Frederic Sowa fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel); 129138b7097bSHannes Frederic Sowa 12920e0d44abSSteffen Klassert dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p); 129368d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 129468d0c6d3SDavid S. Miller err = PTR_ERR(dst); 129568d0c6d3SDavid S. Miller dst = NULL; 1296db8dac20SDavid S. Miller goto out; 1297db8dac20SDavid S. Miller } 1298db8dac20SDavid S. Miller 129926879da5SWei Wang if (ipc6.hlimit < 0) 130026879da5SWei Wang ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); 1301db8dac20SDavid S. Miller 1302db8dac20SDavid S. Miller if (msg->msg_flags&MSG_CONFIRM) 1303db8dac20SDavid S. Miller goto do_confirm; 1304db8dac20SDavid S. Miller back_from_confirm: 1305db8dac20SDavid S. Miller 130603485f2aSVlad Yasevich /* Lockless fast path for the non-corking case */ 130703485f2aSVlad Yasevich if (!corkreq) { 130803485f2aSVlad Yasevich struct sk_buff *skb; 130903485f2aSVlad Yasevich 131003485f2aSVlad Yasevich skb = ip6_make_skb(sk, getfrag, msg, ulen, 131126879da5SWei Wang sizeof(struct udphdr), &ipc6, 131203485f2aSVlad Yasevich &fl6, (struct rt6_info *)dst, 131326879da5SWei Wang msg->msg_flags, &sockc); 131403485f2aSVlad Yasevich err = PTR_ERR(skb); 131503485f2aSVlad Yasevich if (!IS_ERR_OR_NULL(skb)) 131603485f2aSVlad Yasevich err = udp_v6_send_skb(skb, &fl6); 131703485f2aSVlad Yasevich goto release_dst; 131803485f2aSVlad Yasevich } 131903485f2aSVlad Yasevich 1320db8dac20SDavid S. Miller lock_sock(sk); 1321db8dac20SDavid S. Miller if (unlikely(up->pending)) { 1322db8dac20SDavid S. Miller /* The socket is already corked while preparing it. */ 1323db8dac20SDavid S. Miller /* ... which is an evident application bug. --ANK */ 1324db8dac20SDavid S. Miller release_sock(sk); 1325db8dac20SDavid S. Miller 1326ba7a46f1SJoe Perches net_dbg_ratelimited("udp cork app bug 2\n"); 1327db8dac20SDavid S. Miller err = -EINVAL; 1328db8dac20SDavid S. Miller goto out; 1329db8dac20SDavid S. Miller } 1330db8dac20SDavid S. Miller 1331db8dac20SDavid S. Miller up->pending = AF_INET6; 1332db8dac20SDavid S. Miller 1333db8dac20SDavid S. Miller do_append_data: 133426879da5SWei Wang if (ipc6.dontfrag < 0) 133526879da5SWei Wang ipc6.dontfrag = np->dontfrag; 1336db8dac20SDavid S. Miller up->len += ulen; 133726879da5SWei Wang err = ip6_append_data(sk, getfrag, msg, ulen, sizeof(struct udphdr), 133826879da5SWei Wang &ipc6, &fl6, (struct rt6_info *)dst, 133926879da5SWei Wang corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, &sockc); 1340db8dac20SDavid S. Miller if (err) 1341db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1342db8dac20SDavid S. Miller else if (!corkreq) 1343db8dac20SDavid S. Miller err = udp_v6_push_pending_frames(sk); 1344db8dac20SDavid S. Miller else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) 1345db8dac20SDavid S. Miller up->pending = 0; 1346db8dac20SDavid S. Miller 134703485f2aSVlad Yasevich if (err > 0) 134803485f2aSVlad Yasevich err = np->recverr ? net_xmit_errno(err) : 0; 134903485f2aSVlad Yasevich release_sock(sk); 135003485f2aSVlad Yasevich 135103485f2aSVlad Yasevich release_dst: 1352db8dac20SDavid S. Miller if (dst) { 1353db8dac20SDavid S. Miller if (connected) { 1354db8dac20SDavid S. Miller ip6_dst_store(sk, dst, 1355efe4208fSEric Dumazet ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? 1356efe4208fSEric Dumazet &sk->sk_v6_daddr : NULL, 1357db8dac20SDavid S. Miller #ifdef CONFIG_IPV6_SUBTREES 13584c9483b2SDavid S. Miller ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1359db8dac20SDavid S. Miller &np->saddr : 1360db8dac20SDavid S. Miller #endif 1361db8dac20SDavid S. Miller NULL); 1362db8dac20SDavid S. Miller } else { 1363db8dac20SDavid S. Miller dst_release(dst); 1364db8dac20SDavid S. Miller } 1365a3c96089SYOSHIFUJI Hideaki dst = NULL; 1366db8dac20SDavid S. Miller } 1367db8dac20SDavid S. Miller 1368db8dac20SDavid S. Miller out: 1369a3c96089SYOSHIFUJI Hideaki dst_release(dst); 1370db8dac20SDavid S. Miller fl6_sock_release(flowlabel); 137145f6fad8SEric Dumazet txopt_put(opt_to_free); 1372db8dac20SDavid S. Miller if (!err) 1373db8dac20SDavid S. Miller return len; 1374db8dac20SDavid S. Miller /* 1375db8dac20SDavid S. Miller * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting 1376db8dac20SDavid S. Miller * ENOBUFS might not be good (it's not tunable per se), but otherwise 1377db8dac20SDavid S. Miller * we don't have a good statistic (IpOutDiscards but it can be too many 1378db8dac20SDavid S. Miller * things). We could add another new stat but at least for now that 1379db8dac20SDavid S. Miller * seems like overkill. 1380db8dac20SDavid S. Miller */ 1381db8dac20SDavid S. Miller if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 13826aef70a8SEric Dumazet UDP6_INC_STATS(sock_net(sk), 1383235b9f7aSPavel Emelyanov UDP_MIB_SNDBUFERRORS, is_udplite); 1384db8dac20SDavid S. Miller } 1385db8dac20SDavid S. Miller return err; 1386db8dac20SDavid S. Miller 1387db8dac20SDavid S. Miller do_confirm: 13880dec879fSJulian Anastasov if (msg->msg_flags & MSG_PROBE) 13890dec879fSJulian Anastasov dst_confirm_neigh(dst, &fl6.daddr); 1390db8dac20SDavid S. Miller if (!(msg->msg_flags&MSG_PROBE) || len) 1391db8dac20SDavid S. Miller goto back_from_confirm; 1392db8dac20SDavid S. Miller err = 0; 1393db8dac20SDavid S. Miller goto out; 1394db8dac20SDavid S. Miller } 1395db8dac20SDavid S. Miller 13967d06b2e0SBrian Haley void udpv6_destroy_sock(struct sock *sk) 1397db8dac20SDavid S. Miller { 139844046a59STom Parkin struct udp_sock *up = udp_sk(sk); 1399db8dac20SDavid S. Miller lock_sock(sk); 1400db8dac20SDavid S. Miller udp_v6_flush_pending_frames(sk); 1401db8dac20SDavid S. Miller release_sock(sk); 1402db8dac20SDavid S. Miller 140344046a59STom Parkin if (static_key_false(&udpv6_encap_needed) && up->encap_type) { 140444046a59STom Parkin void (*encap_destroy)(struct sock *sk); 14056aa7de05SMark Rutland encap_destroy = READ_ONCE(up->encap_destroy); 140644046a59STom Parkin if (encap_destroy) 140744046a59STom Parkin encap_destroy(sk); 140844046a59STom Parkin } 140944046a59STom Parkin 1410db8dac20SDavid S. Miller inet6_destroy_sock(sk); 1411db8dac20SDavid S. Miller } 1412db8dac20SDavid S. Miller 1413db8dac20SDavid S. Miller /* 1414db8dac20SDavid S. Miller * Socket option code for UDP 1415db8dac20SDavid S. Miller */ 1416db8dac20SDavid S. Miller int udpv6_setsockopt(struct sock *sk, int level, int optname, 1417b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1418db8dac20SDavid S. Miller { 1419db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1420db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1421db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1422db8dac20SDavid S. Miller return ipv6_setsockopt(sk, level, optname, optval, optlen); 1423db8dac20SDavid S. Miller } 1424db8dac20SDavid S. Miller 1425db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1426db8dac20SDavid S. Miller int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, 1427b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1428db8dac20SDavid S. Miller { 1429db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1430db8dac20SDavid S. Miller return udp_lib_setsockopt(sk, level, optname, optval, optlen, 1431db8dac20SDavid S. Miller udp_v6_push_pending_frames); 1432db8dac20SDavid S. Miller return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); 1433db8dac20SDavid S. Miller } 1434db8dac20SDavid S. Miller #endif 1435db8dac20SDavid S. Miller 1436db8dac20SDavid S. Miller int udpv6_getsockopt(struct sock *sk, int level, int optname, 1437db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1438db8dac20SDavid S. Miller { 1439db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1440db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1441db8dac20SDavid S. Miller return ipv6_getsockopt(sk, level, optname, optval, optlen); 1442db8dac20SDavid S. Miller } 1443db8dac20SDavid S. Miller 1444db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1445db8dac20SDavid S. Miller int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, 1446db8dac20SDavid S. Miller char __user *optval, int __user *optlen) 1447db8dac20SDavid S. Miller { 1448db8dac20SDavid S. Miller if (level == SOL_UDP || level == SOL_UDPLITE) 1449db8dac20SDavid S. Miller return udp_lib_getsockopt(sk, level, optname, optval, optlen); 1450db8dac20SDavid S. Miller return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); 1451db8dac20SDavid S. Miller } 1452db8dac20SDavid S. Miller #endif 1453db8dac20SDavid S. Miller 1454a8e3bb34SDavid Ahern /* thinking of making this const? Don't. 1455a8e3bb34SDavid Ahern * early_demux can change based on sysctl. 1456a8e3bb34SDavid Ahern */ 1457dddb64bcSsubashab@codeaurora.org static struct inet6_protocol udpv6_protocol = { 14585425077dSsubashab@codeaurora.org .early_demux = udp_v6_early_demux, 1459dddb64bcSsubashab@codeaurora.org .early_demux_handler = udp_v6_early_demux, 1460db8dac20SDavid S. Miller .handler = udpv6_rcv, 1461db8dac20SDavid S. Miller .err_handler = udpv6_err, 1462db8dac20SDavid S. Miller .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 1463db8dac20SDavid S. Miller }; 1464db8dac20SDavid S. Miller 1465db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1466db8dac20SDavid S. Miller #ifdef CONFIG_PROC_FS 1467db8dac20SDavid S. Miller int udp6_seq_show(struct seq_file *seq, void *v) 1468db8dac20SDavid S. Miller { 146917ef66afSLorenzo Colitti if (v == SEQ_START_TOKEN) { 147017ef66afSLorenzo Colitti seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); 147117ef66afSLorenzo Colitti } else { 147217ef66afSLorenzo Colitti int bucket = ((struct udp_iter_state *)seq->private)->bucket; 147317ef66afSLorenzo Colitti struct inet_sock *inet = inet_sk(v); 147417ef66afSLorenzo Colitti __u16 srcp = ntohs(inet->inet_sport); 147517ef66afSLorenzo Colitti __u16 destp = ntohs(inet->inet_dport); 147617ef66afSLorenzo Colitti ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); 147717ef66afSLorenzo Colitti } 1478db8dac20SDavid S. Miller return 0; 1479db8dac20SDavid S. Miller } 1480db8dac20SDavid S. Miller 148173cb88ecSArjan van de Ven static const struct file_operations udp6_afinfo_seq_fops = { 148273cb88ecSArjan van de Ven .owner = THIS_MODULE, 148373cb88ecSArjan van de Ven .open = udp_seq_open, 148473cb88ecSArjan van de Ven .read = seq_read, 148573cb88ecSArjan van de Ven .llseek = seq_lseek, 148673cb88ecSArjan van de Ven .release = seq_release_net 148773cb88ecSArjan van de Ven }; 148873cb88ecSArjan van de Ven 1489db8dac20SDavid S. Miller static struct udp_seq_afinfo udp6_seq_afinfo = { 1490db8dac20SDavid S. Miller .name = "udp6", 1491db8dac20SDavid S. Miller .family = AF_INET6, 1492645ca708SEric Dumazet .udp_table = &udp_table, 149373cb88ecSArjan van de Ven .seq_fops = &udp6_afinfo_seq_fops, 1494dda61925SDenis V. Lunev .seq_ops = { 1495dda61925SDenis V. Lunev .show = udp6_seq_show, 1496dda61925SDenis V. Lunev }, 1497db8dac20SDavid S. Miller }; 1498db8dac20SDavid S. Miller 14992c8c1e72SAlexey Dobriyan int __net_init udp6_proc_init(struct net *net) 1500db8dac20SDavid S. Miller { 15010c96d8c5SDaniel Lezcano return udp_proc_register(net, &udp6_seq_afinfo); 1502db8dac20SDavid S. Miller } 1503db8dac20SDavid S. Miller 1504ec120da6SIan Morris void udp6_proc_exit(struct net *net) 1505ec120da6SIan Morris { 15060c96d8c5SDaniel Lezcano udp_proc_unregister(net, &udp6_seq_afinfo); 1507db8dac20SDavid S. Miller } 1508db8dac20SDavid S. Miller #endif /* CONFIG_PROC_FS */ 1509db8dac20SDavid S. Miller 1510db8dac20SDavid S. Miller /* ------------------------------------------------------------------------ */ 1511db8dac20SDavid S. Miller 1512db8dac20SDavid S. Miller struct proto udpv6_prot = { 1513db8dac20SDavid S. Miller .name = "UDPv6", 1514db8dac20SDavid S. Miller .owner = THIS_MODULE, 1515db8dac20SDavid S. Miller .close = udp_lib_close, 1516db8dac20SDavid S. Miller .connect = ip6_datagram_connect, 1517db8dac20SDavid S. Miller .disconnect = udp_disconnect, 1518db8dac20SDavid S. Miller .ioctl = udp_ioctl, 1519850cbaddSPaolo Abeni .init = udp_init_sock, 1520db8dac20SDavid S. Miller .destroy = udpv6_destroy_sock, 1521db8dac20SDavid S. Miller .setsockopt = udpv6_setsockopt, 1522db8dac20SDavid S. Miller .getsockopt = udpv6_getsockopt, 1523db8dac20SDavid S. Miller .sendmsg = udpv6_sendmsg, 1524db8dac20SDavid S. Miller .recvmsg = udpv6_recvmsg, 1525e646b657SMartin KaFai Lau .release_cb = ip6_datagram_release_cb, 1526db8dac20SDavid S. Miller .hash = udp_lib_hash, 1527db8dac20SDavid S. Miller .unhash = udp_lib_unhash, 1528719f8358SEric Dumazet .rehash = udp_v6_rehash, 1529db8dac20SDavid S. Miller .get_port = udp_v6_get_port, 1530db8dac20SDavid S. Miller .memory_allocated = &udp_memory_allocated, 1531db8dac20SDavid S. Miller .sysctl_mem = sysctl_udp_mem, 1532db8dac20SDavid S. Miller .sysctl_wmem = &sysctl_udp_wmem_min, 1533db8dac20SDavid S. Miller .sysctl_rmem = &sysctl_udp_rmem_min, 1534db8dac20SDavid S. Miller .obj_size = sizeof(struct udp6_sock), 1535645ca708SEric Dumazet .h.udp_table = &udp_table, 1536db8dac20SDavid S. Miller #ifdef CONFIG_COMPAT 1537db8dac20SDavid S. Miller .compat_setsockopt = compat_udpv6_setsockopt, 1538db8dac20SDavid S. Miller .compat_getsockopt = compat_udpv6_getsockopt, 1539db8dac20SDavid S. Miller #endif 15405d77dca8SDavid Ahern .diag_destroy = udp_abort, 1541db8dac20SDavid S. Miller }; 1542db8dac20SDavid S. Miller 1543db8dac20SDavid S. Miller static struct inet_protosw udpv6_protosw = { 1544db8dac20SDavid S. Miller .type = SOCK_DGRAM, 1545db8dac20SDavid S. Miller .protocol = IPPROTO_UDP, 1546db8dac20SDavid S. Miller .prot = &udpv6_prot, 1547db8dac20SDavid S. Miller .ops = &inet6_dgram_ops, 1548db8dac20SDavid S. Miller .flags = INET_PROTOSW_PERMANENT, 1549db8dac20SDavid S. Miller }; 1550db8dac20SDavid S. Miller 1551db8dac20SDavid S. Miller int __init udpv6_init(void) 1552db8dac20SDavid S. Miller { 1553db8dac20SDavid S. Miller int ret; 1554db8dac20SDavid S. Miller 15553336288aSVlad Yasevich ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); 15563336288aSVlad Yasevich if (ret) 1557c6b641a4SVlad Yasevich goto out; 15583336288aSVlad Yasevich 1559db8dac20SDavid S. Miller ret = inet6_register_protosw(&udpv6_protosw); 1560db8dac20SDavid S. Miller if (ret) 1561db8dac20SDavid S. Miller goto out_udpv6_protocol; 1562db8dac20SDavid S. Miller out: 1563db8dac20SDavid S. Miller return ret; 1564db8dac20SDavid S. Miller 1565db8dac20SDavid S. Miller out_udpv6_protocol: 1566db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1567db8dac20SDavid S. Miller goto out; 1568db8dac20SDavid S. Miller } 1569db8dac20SDavid S. Miller 1570db8dac20SDavid S. Miller void udpv6_exit(void) 1571db8dac20SDavid S. Miller { 1572db8dac20SDavid S. Miller inet6_unregister_protosw(&udpv6_protosw); 1573db8dac20SDavid S. Miller inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); 1574db8dac20SDavid S. Miller } 1575