12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds * RAW sockets for IPv6
41da177e4SLinus Torvalds * Linux INET6 implementation
51da177e4SLinus Torvalds *
61da177e4SLinus Torvalds * Authors:
71da177e4SLinus Torvalds * Pedro Roque <roque@di.fc.ul.pt>
81da177e4SLinus Torvalds *
91da177e4SLinus Torvalds * Adapted from linux/net/ipv4/raw.c
101da177e4SLinus Torvalds *
111da177e4SLinus Torvalds * Fixes:
121da177e4SLinus Torvalds * Hideaki YOSHIFUJI : sin6_scope_id support
131da177e4SLinus Torvalds * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
141da177e4SLinus Torvalds * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
151da177e4SLinus Torvalds */
161da177e4SLinus Torvalds
171da177e4SLinus Torvalds #include <linux/errno.h>
181da177e4SLinus Torvalds #include <linux/types.h>
191da177e4SLinus Torvalds #include <linux/socket.h>
205a0e3ad6STejun Heo #include <linux/slab.h>
211da177e4SLinus Torvalds #include <linux/sockios.h>
221da177e4SLinus Torvalds #include <linux/net.h>
231da177e4SLinus Torvalds #include <linux/in6.h>
241da177e4SLinus Torvalds #include <linux/netdevice.h>
251da177e4SLinus Torvalds #include <linux/if_arp.h>
261da177e4SLinus Torvalds #include <linux/icmpv6.h>
271da177e4SLinus Torvalds #include <linux/netfilter.h>
281da177e4SLinus Torvalds #include <linux/netfilter_ipv6.h>
293305b80cSHerbert Xu #include <linux/skbuff.h>
30e2d57766SDavid S. Miller #include <linux/compat.h>
3129778becSAlex W Slater #include <linux/uaccess.h>
321da177e4SLinus Torvalds #include <asm/ioctls.h>
331da177e4SLinus Torvalds
34457c4cbcSEric W. Biederman #include <net/net_namespace.h>
351da177e4SLinus Torvalds #include <net/ip.h>
361da177e4SLinus Torvalds #include <net/sock.h>
371da177e4SLinus Torvalds #include <net/snmp.h>
381da177e4SLinus Torvalds
391da177e4SLinus Torvalds #include <net/ipv6.h>
401da177e4SLinus Torvalds #include <net/ndisc.h>
411da177e4SLinus Torvalds #include <net/protocol.h>
421da177e4SLinus Torvalds #include <net/ip6_route.h>
431da177e4SLinus Torvalds #include <net/ip6_checksum.h>
441da177e4SLinus Torvalds #include <net/addrconf.h>
451da177e4SLinus Torvalds #include <net/transp_v6.h>
461da177e4SLinus Torvalds #include <net/udp.h>
471da177e4SLinus Torvalds #include <net/inet_common.h>
48c752f073SArnaldo Carvalho de Melo #include <net/tcp_states.h>
4907a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6)
507be96f76SMasahide NAKAMURA #include <net/mip6.h>
517be96f76SMasahide NAKAMURA #endif
527bc570c8SYOSHIFUJI Hideaki #include <linux/mroute6.h>
531da177e4SLinus Torvalds
54b673e4dfSPavel Emelyanov #include <net/raw.h>
551da177e4SLinus Torvalds #include <net/rawv6.h>
561da177e4SLinus Torvalds #include <net/xfrm.h>
571da177e4SLinus Torvalds
581da177e4SLinus Torvalds #include <linux/proc_fs.h>
591da177e4SLinus Torvalds #include <linux/seq_file.h>
60bc3b2d7fSPaul Gortmaker #include <linux/export.h>
611da177e4SLinus Torvalds
62d1c53c8eSWerner Almesberger #define ICMPV6_HDRLEN 4 /* ICMPv6 header, RFC 4443 Section 2.1 */
63d1c53c8eSWerner Almesberger
640daf07e5SEric Dumazet struct raw_hashinfo raw_v6_hashinfo;
65432490f9SCyrill Gorcunov EXPORT_SYMBOL_GPL(raw_v6_hashinfo);
661da177e4SLinus Torvalds
raw_v6_match(struct net * net,const struct sock * sk,unsigned short num,const struct in6_addr * loc_addr,const struct in6_addr * rmt_addr,int dif,int sdif)67db6af4fdSEric Dumazet bool raw_v6_match(struct net *net, const struct sock *sk, unsigned short num,
68ba44f818SEric Dumazet const struct in6_addr *loc_addr,
695108ab4bSDavid Ahern const struct in6_addr *rmt_addr, int dif, int sdif)
701da177e4SLinus Torvalds {
71ba44f818SEric Dumazet if (inet_sk(sk)->inet_num != num ||
72ba44f818SEric Dumazet !net_eq(sock_net(sk), net) ||
73ba44f818SEric Dumazet (!ipv6_addr_any(&sk->sk_v6_daddr) &&
74ba44f818SEric Dumazet !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) ||
75ba44f818SEric Dumazet !raw_sk_bound_dev_eq(net, sk->sk_bound_dev_if,
767055420fSDuncan Eastoe dif, sdif))
77ba44f818SEric Dumazet return false;
780bd1b59bSAndrew McDonald
79ba44f818SEric Dumazet if (ipv6_addr_any(&sk->sk_v6_rcv_saddr) ||
80ba44f818SEric Dumazet ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr) ||
81ba44f818SEric Dumazet (ipv6_addr_is_multicast(loc_addr) &&
82ba44f818SEric Dumazet inet6_mc_check(sk, loc_addr, rmt_addr)))
83ba44f818SEric Dumazet return true;
84ba44f818SEric Dumazet
85ba44f818SEric Dumazet return false;
861da177e4SLinus Torvalds }
87ba44f818SEric Dumazet EXPORT_SYMBOL_GPL(raw_v6_match);
881da177e4SLinus Torvalds
891da177e4SLinus Torvalds /*
901da177e4SLinus Torvalds * 0 - deliver
911da177e4SLinus Torvalds * 1 - block
921da177e4SLinus Torvalds */
icmpv6_filter(const struct sock * sk,const struct sk_buff * skb)931b05c4b5SEric Dumazet static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
941da177e4SLinus Torvalds {
959cc08af3SWerner Almesberger struct icmp6hdr _hdr;
961b05c4b5SEric Dumazet const struct icmp6hdr *hdr;
971da177e4SLinus Torvalds
98d1c53c8eSWerner Almesberger /* We require only the four bytes of the ICMPv6 header, not any
99d1c53c8eSWerner Almesberger * additional bytes of message body in "struct icmp6hdr".
100d1c53c8eSWerner Almesberger */
1011b05c4b5SEric Dumazet hdr = skb_header_pointer(skb, skb_transport_offset(skb),
102d1c53c8eSWerner Almesberger ICMPV6_HDRLEN, &_hdr);
1031b05c4b5SEric Dumazet if (hdr) {
1041b05c4b5SEric Dumazet const __u32 *data = &raw6_sk(sk)->filter.data[0];
1051b05c4b5SEric Dumazet unsigned int type = hdr->icmp6_type;
1061da177e4SLinus Torvalds
1071b05c4b5SEric Dumazet return (data[type >> 5] & (1U << (type & 31))) != 0;
1081da177e4SLinus Torvalds }
1091b05c4b5SEric Dumazet return 1;
1101da177e4SLinus Torvalds }
1111da177e4SLinus Torvalds
11207a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6)
113f2eda47dSEric Dumazet typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
11459fbb3a6SMasahide NAKAMURA
115f2eda47dSEric Dumazet static mh_filter_t __rcu *mh_filter __read_mostly;
116f2eda47dSEric Dumazet
rawv6_mh_filter_register(mh_filter_t filter)117f2eda47dSEric Dumazet int rawv6_mh_filter_register(mh_filter_t filter)
11859fbb3a6SMasahide NAKAMURA {
119cf778b00SEric Dumazet rcu_assign_pointer(mh_filter, filter);
12059fbb3a6SMasahide NAKAMURA return 0;
12159fbb3a6SMasahide NAKAMURA }
12259fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_register);
12359fbb3a6SMasahide NAKAMURA
rawv6_mh_filter_unregister(mh_filter_t filter)124f2eda47dSEric Dumazet int rawv6_mh_filter_unregister(mh_filter_t filter)
12559fbb3a6SMasahide NAKAMURA {
126a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(mh_filter, NULL);
12759fbb3a6SMasahide NAKAMURA synchronize_rcu();
12859fbb3a6SMasahide NAKAMURA return 0;
12959fbb3a6SMasahide NAKAMURA }
13059fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_unregister);
13159fbb3a6SMasahide NAKAMURA
13259fbb3a6SMasahide NAKAMURA #endif
13359fbb3a6SMasahide NAKAMURA
1341da177e4SLinus Torvalds /*
1351da177e4SLinus Torvalds * demultiplex raw sockets.
1361da177e4SLinus Torvalds * (should consider queueing the skb in the sock receive_queue
1371da177e4SLinus Torvalds * without calling rawv6.c)
1381da177e4SLinus Torvalds *
1391da177e4SLinus Torvalds * Caller owns SKB so we must make clones.
1401da177e4SLinus Torvalds */
ipv6_raw_deliver(struct sk_buff * skb,int nexthdr)141a50feda5SEric Dumazet static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
1421da177e4SLinus Torvalds {
143ba44f818SEric Dumazet struct net *net = dev_net(skb->dev);
144b71d1d42SEric Dumazet const struct in6_addr *saddr;
145b71d1d42SEric Dumazet const struct in6_addr *daddr;
1460a78cf72SKuniyuki Iwashima struct hlist_head *hlist;
1471da177e4SLinus Torvalds struct sock *sk;
148a50feda5SEric Dumazet bool delivered = false;
1491da177e4SLinus Torvalds __u8 hash;
1501da177e4SLinus Torvalds
1510660e03fSArnaldo Carvalho de Melo saddr = &ipv6_hdr(skb)->saddr;
1521da177e4SLinus Torvalds daddr = saddr + 1;
1531da177e4SLinus Torvalds
1546579f5baSEric Dumazet hash = raw_hashfunc(net, nexthdr);
1550daf07e5SEric Dumazet hlist = &raw_v6_hashinfo.ht[hash];
1560daf07e5SEric Dumazet rcu_read_lock();
1570a78cf72SKuniyuki Iwashima sk_for_each_rcu(sk, hlist) {
1587be96f76SMasahide NAKAMURA int filtered;
1597be96f76SMasahide NAKAMURA
160ba44f818SEric Dumazet if (!raw_v6_match(net, sk, nexthdr, daddr, saddr,
161ba44f818SEric Dumazet inet6_iif(skb), inet6_sdif(skb)))
162ba44f818SEric Dumazet continue;
163a50feda5SEric Dumazet delivered = true;
1647be96f76SMasahide NAKAMURA switch (nexthdr) {
1657be96f76SMasahide NAKAMURA case IPPROTO_ICMPV6:
1667be96f76SMasahide NAKAMURA filtered = icmpv6_filter(sk, skb);
1677be96f76SMasahide NAKAMURA break;
16859fbb3a6SMasahide NAKAMURA
16907a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6)
1707be96f76SMasahide NAKAMURA case IPPROTO_MH:
17159fbb3a6SMasahide NAKAMURA {
1727be96f76SMasahide NAKAMURA /* XXX: To validate MH only once for each packet,
1737be96f76SMasahide NAKAMURA * this is placed here. It should be after checking
1747be96f76SMasahide NAKAMURA * xfrm policy, however it doesn't. The checking xfrm
1757be96f76SMasahide NAKAMURA * policy is placed in rawv6_rcv() because it is
1767be96f76SMasahide NAKAMURA * required for each socket.
1777be96f76SMasahide NAKAMURA */
178f2eda47dSEric Dumazet mh_filter_t *filter;
17959fbb3a6SMasahide NAKAMURA
18059fbb3a6SMasahide NAKAMURA filter = rcu_dereference(mh_filter);
181f2eda47dSEric Dumazet filtered = filter ? (*filter)(sk, skb) : 0;
1827be96f76SMasahide NAKAMURA break;
18359fbb3a6SMasahide NAKAMURA }
1847be96f76SMasahide NAKAMURA #endif
1857be96f76SMasahide NAKAMURA default:
1867be96f76SMasahide NAKAMURA filtered = 0;
1877be96f76SMasahide NAKAMURA break;
1887be96f76SMasahide NAKAMURA }
1897be96f76SMasahide NAKAMURA
1907be96f76SMasahide NAKAMURA if (filtered < 0)
1917be96f76SMasahide NAKAMURA break;
1927be96f76SMasahide NAKAMURA if (filtered == 0) {
1931da177e4SLinus Torvalds struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
1941da177e4SLinus Torvalds
1951da177e4SLinus Torvalds /* Not releasing hash table! */
196b0e214d2SMadhu Koriginja if (clone)
1971da177e4SLinus Torvalds rawv6_rcv(sk, clone);
1981da177e4SLinus Torvalds }
1999fb9cbb1SYasuyuki Kozakai }
2000daf07e5SEric Dumazet rcu_read_unlock();
201d13964f4SPatrick McHardy return delivered;
2021da177e4SLinus Torvalds }
2031da177e4SLinus Torvalds
raw6_local_deliver(struct sk_buff * skb,int nexthdr)204a50feda5SEric Dumazet bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
20569d6da0bSPavel Emelyanov {
206ba44f818SEric Dumazet return ipv6_raw_deliver(skb, nexthdr);
20769d6da0bSPavel Emelyanov }
20869d6da0bSPavel Emelyanov
2091da177e4SLinus Torvalds /* This cleans up af_inet6 a bit. -DaveM */
rawv6_bind(struct sock * sk,struct sockaddr * uaddr,int addr_len)2101da177e4SLinus Torvalds static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
2111da177e4SLinus Torvalds {
2121da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk);
2131da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk);
2141da177e4SLinus Torvalds struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
215e69a4adcSAl Viro __be32 v4addr = 0;
2161da177e4SLinus Torvalds int addr_type;
2171da177e4SLinus Torvalds int err;
2181da177e4SLinus Torvalds
2191da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133)
2201da177e4SLinus Torvalds return -EINVAL;
22182b276cdSHannes Frederic Sowa
22282b276cdSHannes Frederic Sowa if (addr->sin6_family != AF_INET6)
22382b276cdSHannes Frederic Sowa return -EINVAL;
22482b276cdSHannes Frederic Sowa
2251da177e4SLinus Torvalds addr_type = ipv6_addr_type(&addr->sin6_addr);
2261da177e4SLinus Torvalds
2271da177e4SLinus Torvalds /* Raw sockets are IPv6 only */
2281da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED)
229fd5c0027SEric Dumazet return -EADDRNOTAVAIL;
2301da177e4SLinus Torvalds
2311da177e4SLinus Torvalds lock_sock(sk);
2321da177e4SLinus Torvalds
2331da177e4SLinus Torvalds err = -EINVAL;
2341da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE)
2351da177e4SLinus Torvalds goto out;
2361da177e4SLinus Torvalds
237fd5c0027SEric Dumazet rcu_read_lock();
2381da177e4SLinus Torvalds /* Check if the address belongs to the host. */
2391da177e4SLinus Torvalds if (addr_type != IPV6_ADDR_ANY) {
2401da177e4SLinus Torvalds struct net_device *dev = NULL;
2411da177e4SLinus Torvalds
242842df073SHannes Frederic Sowa if (__ipv6_addr_needs_scope_id(addr_type)) {
2431da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) &&
2441da177e4SLinus Torvalds addr->sin6_scope_id) {
2451da177e4SLinus Torvalds /* Override any existing binding, if another
2461da177e4SLinus Torvalds * one is supplied by user.
2471da177e4SLinus Torvalds */
2481da177e4SLinus Torvalds sk->sk_bound_dev_if = addr->sin6_scope_id;
2491da177e4SLinus Torvalds }
2501da177e4SLinus Torvalds
2511da177e4SLinus Torvalds /* Binding to link-local address requires an interface */
2521da177e4SLinus Torvalds if (!sk->sk_bound_dev_if)
253fd5c0027SEric Dumazet goto out_unlock;
25472f7cfabSMike Manning }
2551da177e4SLinus Torvalds
25672f7cfabSMike Manning if (sk->sk_bound_dev_if) {
2571da177e4SLinus Torvalds err = -ENODEV;
258fd5c0027SEric Dumazet dev = dev_get_by_index_rcu(sock_net(sk),
259fd5c0027SEric Dumazet sk->sk_bound_dev_if);
260fd5c0027SEric Dumazet if (!dev)
261fd5c0027SEric Dumazet goto out_unlock;
2621da177e4SLinus Torvalds }
2631da177e4SLinus Torvalds
2641da177e4SLinus Torvalds /* ipv4 addr of the socket is invalid. Only the
2651da177e4SLinus Torvalds * unspecified and mapped address have a v4 equivalent.
2661da177e4SLinus Torvalds */
2671da177e4SLinus Torvalds v4addr = LOOPBACK4_IPV6;
26835a256feSTom Herbert if (!(addr_type & IPV6_ADDR_MULTICAST) &&
269630e4576SMaciej Żenczykowski !ipv6_can_nonlocal_bind(sock_net(sk), inet)) {
2701da177e4SLinus Torvalds err = -EADDRNOTAVAIL;
2713b1e0a65SYOSHIFUJI Hideaki if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
272bfeade08SDaniel Lezcano dev, 0)) {
273fd5c0027SEric Dumazet goto out_unlock;
2741da177e4SLinus Torvalds }
2751da177e4SLinus Torvalds }
2761da177e4SLinus Torvalds }
2771da177e4SLinus Torvalds
278c720c7e8SEric Dumazet inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
279efe4208fSEric Dumazet sk->sk_v6_rcv_saddr = addr->sin6_addr;
2801da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST))
2814e3fd7a0SAlexey Dobriyan np->saddr = addr->sin6_addr;
2821da177e4SLinus Torvalds err = 0;
283fd5c0027SEric Dumazet out_unlock:
284fd5c0027SEric Dumazet rcu_read_unlock();
2851da177e4SLinus Torvalds out:
2861da177e4SLinus Torvalds release_sock(sk);
2871da177e4SLinus Torvalds return err;
2881da177e4SLinus Torvalds }
2891da177e4SLinus Torvalds
rawv6_err(struct sock * sk,struct sk_buff * skb,struct inet6_skb_parm * opt,u8 type,u8 code,int offset,__be32 info)29069d6da0bSPavel Emelyanov static void rawv6_err(struct sock *sk, struct sk_buff *skb,
2911da177e4SLinus Torvalds struct inet6_skb_parm *opt,
292d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info)
2931da177e4SLinus Torvalds {
2941da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk);
2951da177e4SLinus Torvalds int err;
2961da177e4SLinus Torvalds int harderr;
2971da177e4SLinus Torvalds
2981da177e4SLinus Torvalds /* Report error on raw socket, if:
2991da177e4SLinus Torvalds 1. User requested recverr.
3001da177e4SLinus Torvalds 2. Socket is connected (otherwise the error indication
3011da177e4SLinus Torvalds is useless without recverr and error is hard.
3021da177e4SLinus Torvalds */
3031da177e4SLinus Torvalds if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
3041da177e4SLinus Torvalds return;
3051da177e4SLinus Torvalds
3061da177e4SLinus Torvalds harderr = icmpv6_err_convert(type, code, &err);
30781aded24SDavid S. Miller if (type == ICMPV6_PKT_TOOBIG) {
30881aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info);
3091da177e4SLinus Torvalds harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
31081aded24SDavid S. Miller }
3118d65b119SDuan Jiong if (type == NDISC_REDIRECT) {
312ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk);
3138d65b119SDuan Jiong return;
3148d65b119SDuan Jiong }
3151da177e4SLinus Torvalds if (np->recverr) {
3161da177e4SLinus Torvalds u8 *payload = skb->data;
317cafbe182SEric Dumazet if (!inet_test_bit(HDRINCL, sk))
3181da177e4SLinus Torvalds payload += offset;
3191da177e4SLinus Torvalds ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
3201da177e4SLinus Torvalds }
3211da177e4SLinus Torvalds
3221da177e4SLinus Torvalds if (np->recverr || harderr) {
3231da177e4SLinus Torvalds sk->sk_err = err;
324e3ae2365SAlexander Aring sk_error_report(sk);
3251da177e4SLinus Torvalds }
3261da177e4SLinus Torvalds }
3271da177e4SLinus Torvalds
raw6_icmp_error(struct sk_buff * skb,int nexthdr,u8 type,u8 code,int inner_offset,__be32 info)32869d6da0bSPavel Emelyanov void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
329d5fdd6baSBrian Haley u8 type, u8 code, int inner_offset, __be32 info)
33069d6da0bSPavel Emelyanov {
331ba44f818SEric Dumazet struct net *net = dev_net(skb->dev);
3320a78cf72SKuniyuki Iwashima struct hlist_head *hlist;
33369d6da0bSPavel Emelyanov struct sock *sk;
33469d6da0bSPavel Emelyanov int hash;
33569d6da0bSPavel Emelyanov
3366579f5baSEric Dumazet hash = raw_hashfunc(net, nexthdr);
3370daf07e5SEric Dumazet hlist = &raw_v6_hashinfo.ht[hash];
3380daf07e5SEric Dumazet rcu_read_lock();
3390a78cf72SKuniyuki Iwashima sk_for_each_rcu(sk, hlist) {
34005f175cdSYOSHIFUJI Hideaki /* Note: ipv6_hdr(skb) != skb->data */
341b71d1d42SEric Dumazet const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
34269d6da0bSPavel Emelyanov
343ba44f818SEric Dumazet if (!raw_v6_match(net, sk, nexthdr, &ip6h->saddr, &ip6h->daddr,
344ba44f818SEric Dumazet inet6_iif(skb), inet6_iif(skb)))
345ba44f818SEric Dumazet continue;
346ba44f818SEric Dumazet rawv6_err(sk, skb, NULL, type, code, inner_offset, info);
34769d6da0bSPavel Emelyanov }
3480daf07e5SEric Dumazet rcu_read_unlock();
34969d6da0bSPavel Emelyanov }
35069d6da0bSPavel Emelyanov
rawv6_rcv_skb(struct sock * sk,struct sk_buff * skb)3511da177e4SLinus Torvalds static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
3521da177e4SLinus Torvalds {
3538d8ebd77SEric Dumazet enum skb_drop_reason reason;
3548d8ebd77SEric Dumazet
35533d480ceSEric Dumazet if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
356fb286bb2SHerbert Xu skb_checksum_complete(skb)) {
357a92aa318SWang Chen atomic_inc(&sk->sk_drops);
3588d8ebd77SEric Dumazet kfree_skb_reason(skb, SKB_DROP_REASON_SKB_CSUM);
3593cc76caaSYang Hongyang return NET_RX_DROP;
3601da177e4SLinus Torvalds }
3611da177e4SLinus Torvalds
3621da177e4SLinus Torvalds /* Charge it to the socket. */
363d826eb14SEric Dumazet skb_dst_drop(skb);
3648d8ebd77SEric Dumazet if (sock_queue_rcv_skb_reason(sk, skb, &reason) < 0) {
3658d8ebd77SEric Dumazet kfree_skb_reason(skb, reason);
3663cc76caaSYang Hongyang return NET_RX_DROP;
3671da177e4SLinus Torvalds }
3681da177e4SLinus Torvalds
3691da177e4SLinus Torvalds return 0;
3701da177e4SLinus Torvalds }
3711da177e4SLinus Torvalds
3721da177e4SLinus Torvalds /*
3731da177e4SLinus Torvalds * This is next to useless...
3741da177e4SLinus Torvalds * if we demultiplex in network layer we don't need the extra call
3751da177e4SLinus Torvalds * just to queue the skb...
3761da177e4SLinus Torvalds * maybe we could have the network decide upon a hint if it
3771da177e4SLinus Torvalds * should call raw_rcv for demultiplexing
3781da177e4SLinus Torvalds */
rawv6_rcv(struct sock * sk,struct sk_buff * skb)3791da177e4SLinus Torvalds int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
3801da177e4SLinus Torvalds {
3811da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk);
3821da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk);
3831da177e4SLinus Torvalds
3841da177e4SLinus Torvalds if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
385a92aa318SWang Chen atomic_inc(&sk->sk_drops);
3868d8ebd77SEric Dumazet kfree_skb_reason(skb, SKB_DROP_REASON_XFRM_POLICY);
3871da177e4SLinus Torvalds return NET_RX_DROP;
3881da177e4SLinus Torvalds }
389b0e214d2SMadhu Koriginja nf_reset_ct(skb);
3901da177e4SLinus Torvalds
3911da177e4SLinus Torvalds if (!rp->checksum)
3921da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_UNNECESSARY;
3931da177e4SLinus Torvalds
39484fa7933SPatrick McHardy if (skb->ip_summed == CHECKSUM_COMPLETE) {
395d56f90a7SArnaldo Carvalho de Melo skb_postpull_rcsum(skb, skb_network_header(skb),
396cfe1fc77SArnaldo Carvalho de Melo skb_network_header_len(skb));
3970660e03fSArnaldo Carvalho de Melo if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3980660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr,
399c720c7e8SEric Dumazet skb->len, inet->inet_num, skb->csum))
400fb286bb2SHerbert Xu skb->ip_summed = CHECKSUM_UNNECESSARY;
4011da177e4SLinus Torvalds }
40260476372SHerbert Xu if (!skb_csum_unnecessary(skb))
4030660e03fSArnaldo Carvalho de Melo skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4040660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr,
4050660e03fSArnaldo Carvalho de Melo skb->len,
406c720c7e8SEric Dumazet inet->inet_num, 0));
4071da177e4SLinus Torvalds
408cafbe182SEric Dumazet if (inet_test_bit(HDRINCL, sk)) {
409fb286bb2SHerbert Xu if (skb_checksum_complete(skb)) {
410a92aa318SWang Chen atomic_inc(&sk->sk_drops);
4118d8ebd77SEric Dumazet kfree_skb_reason(skb, SKB_DROP_REASON_SKB_CSUM);
4123cc76caaSYang Hongyang return NET_RX_DROP;
4131da177e4SLinus Torvalds }
4141da177e4SLinus Torvalds }
4151da177e4SLinus Torvalds
4161da177e4SLinus Torvalds rawv6_rcv_skb(sk, skb);
4171da177e4SLinus Torvalds return 0;
4181da177e4SLinus Torvalds }
4191da177e4SLinus Torvalds
4201da177e4SLinus Torvalds
4211da177e4SLinus Torvalds /*
4221da177e4SLinus Torvalds * This should be easy, if there is something there
4231da177e4SLinus Torvalds * we return it, otherwise we block.
4241da177e4SLinus Torvalds */
4251da177e4SLinus Torvalds
rawv6_recvmsg(struct sock * sk,struct msghdr * msg,size_t len,int flags,int * addr_len)4261b784140SYing Xue static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
427ec095263SOliver Hartkopp int flags, int *addr_len)
4281da177e4SLinus Torvalds {
4291da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk);
430342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
4311da177e4SLinus Torvalds struct sk_buff *skb;
4321da177e4SLinus Torvalds size_t copied;
4331da177e4SLinus Torvalds int err;
4341da177e4SLinus Torvalds
4351da177e4SLinus Torvalds if (flags & MSG_OOB)
4361da177e4SLinus Torvalds return -EOPNOTSUPP;
4371da177e4SLinus Torvalds
4381da177e4SLinus Torvalds if (flags & MSG_ERRQUEUE)
43985fbaa75SHannes Frederic Sowa return ipv6_recv_error(sk, msg, len, addr_len);
4401da177e4SLinus Torvalds
4414b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu)
44285fbaa75SHannes Frederic Sowa return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
4434b340ae2SBrian Haley
444f4b41f06SOliver Hartkopp skb = skb_recv_datagram(sk, flags, &err);
4451da177e4SLinus Torvalds if (!skb)
4461da177e4SLinus Torvalds goto out;
4471da177e4SLinus Torvalds
4481da177e4SLinus Torvalds copied = skb->len;
4491da177e4SLinus Torvalds if (copied > len) {
4501da177e4SLinus Torvalds copied = len;
4511da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC;
4521da177e4SLinus Torvalds }
4531da177e4SLinus Torvalds
45460476372SHerbert Xu if (skb_csum_unnecessary(skb)) {
45551f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied);
4561da177e4SLinus Torvalds } else if (msg->msg_flags&MSG_TRUNC) {
457fb286bb2SHerbert Xu if (__skb_checksum_complete(skb))
4581da177e4SLinus Torvalds goto csum_copy_err;
45951f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied);
4601da177e4SLinus Torvalds } else {
461227158dbSAl Viro err = skb_copy_and_csum_datagram_msg(skb, 0, msg);
4621da177e4SLinus Torvalds if (err == -EINVAL)
4631da177e4SLinus Torvalds goto csum_copy_err;
4641da177e4SLinus Torvalds }
4651da177e4SLinus Torvalds if (err)
4661da177e4SLinus Torvalds goto out_free;
4671da177e4SLinus Torvalds
4681da177e4SLinus Torvalds /* Copy the address. */
4691da177e4SLinus Torvalds if (sin6) {
4701da177e4SLinus Torvalds sin6->sin6_family = AF_INET6;
471f59fc7f3STetsuo Handa sin6->sin6_port = 0;
4724e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr;
4731da177e4SLinus Torvalds sin6->sin6_flowinfo = 0;
474842df073SHannes Frederic Sowa sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
4754330487aSDuan Jiong inet6_iif(skb));
476bceaa902SHannes Frederic Sowa *addr_len = sizeof(*sin6);
4771da177e4SLinus Torvalds }
4781da177e4SLinus Torvalds
4796fd1d51cSErin MacNeil sock_recv_cmsgs(msg, sk, skb);
4801da177e4SLinus Torvalds
4811da177e4SLinus Torvalds if (np->rxopt.all)
48273df66f8STom Parkin ip6_datagram_recv_ctl(sk, msg, skb);
4831da177e4SLinus Torvalds
4841da177e4SLinus Torvalds err = copied;
4851da177e4SLinus Torvalds if (flags & MSG_TRUNC)
4861da177e4SLinus Torvalds err = skb->len;
4871da177e4SLinus Torvalds
4881da177e4SLinus Torvalds out_free:
4891da177e4SLinus Torvalds skb_free_datagram(sk, skb);
4901da177e4SLinus Torvalds out:
4911da177e4SLinus Torvalds return err;
4921da177e4SLinus Torvalds
4931da177e4SLinus Torvalds csum_copy_err:
4943305b80cSHerbert Xu skb_kill_datagram(sk, skb, flags);
4951da177e4SLinus Torvalds
4961da177e4SLinus Torvalds /* Error for blocking case is chosen to masquerade
4971da177e4SLinus Torvalds as some normal condition.
4981da177e4SLinus Torvalds */
4991da177e4SLinus Torvalds err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
5003305b80cSHerbert Xu goto out;
5011da177e4SLinus Torvalds }
5021da177e4SLinus Torvalds
rawv6_push_pending_frames(struct sock * sk,struct flowi6 * fl6,struct raw6_sock * rp)5034c9483b2SDavid S. Miller static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
504357b40a1SHerbert Xu struct raw6_sock *rp)
5051da177e4SLinus Torvalds {
506cb3e9864SHerbert Xu struct ipv6_txoptions *opt;
5071da177e4SLinus Torvalds struct sk_buff *skb;
5081da177e4SLinus Torvalds int err = 0;
509357b40a1SHerbert Xu int offset;
510357b40a1SHerbert Xu int len;
511679a8738SHerbert Xu int total_len;
512868c86bcSAl Viro __wsum tmp_csum;
513868c86bcSAl Viro __sum16 csum;
5141da177e4SLinus Torvalds
5151da177e4SLinus Torvalds if (!rp->checksum)
5161da177e4SLinus Torvalds goto send;
5171da177e4SLinus Torvalds
51843728fa5SFabian Frederick skb = skb_peek(&sk->sk_write_queue);
51943728fa5SFabian Frederick if (!skb)
5201da177e4SLinus Torvalds goto out;
5211da177e4SLinus Torvalds
522357b40a1SHerbert Xu offset = rp->offset;
523299b0767SSteffen Klassert total_len = inet_sk(sk)->cork.base.length;
524cb3e9864SHerbert Xu opt = inet6_sk(sk)->cork.opt;
525cb3e9864SHerbert Xu total_len -= opt ? opt->opt_flen : 0;
526cb3e9864SHerbert Xu
527679a8738SHerbert Xu if (offset >= total_len - 1) {
5281da177e4SLinus Torvalds err = -EINVAL;
529357b40a1SHerbert Xu ip6_flush_pending_frames(sk);
5301da177e4SLinus Torvalds goto out;
5311da177e4SLinus Torvalds }
5321da177e4SLinus Torvalds
5331da177e4SLinus Torvalds /* should be check HW csum miyazawa */
5341da177e4SLinus Torvalds if (skb_queue_len(&sk->sk_write_queue) == 1) {
5351da177e4SLinus Torvalds /*
5361da177e4SLinus Torvalds * Only one fragment on the socket.
5371da177e4SLinus Torvalds */
5381da177e4SLinus Torvalds tmp_csum = skb->csum;
5391da177e4SLinus Torvalds } else {
540357b40a1SHerbert Xu struct sk_buff *csum_skb = NULL;
5411da177e4SLinus Torvalds tmp_csum = 0;
5421da177e4SLinus Torvalds
5431da177e4SLinus Torvalds skb_queue_walk(&sk->sk_write_queue, skb) {
5441da177e4SLinus Torvalds tmp_csum = csum_add(tmp_csum, skb->csum);
545357b40a1SHerbert Xu
546357b40a1SHerbert Xu if (csum_skb)
547357b40a1SHerbert Xu continue;
548357b40a1SHerbert Xu
549ea2ae17dSArnaldo Carvalho de Melo len = skb->len - skb_transport_offset(skb);
550357b40a1SHerbert Xu if (offset >= len) {
551357b40a1SHerbert Xu offset -= len;
552357b40a1SHerbert Xu continue;
5531da177e4SLinus Torvalds }
554357b40a1SHerbert Xu
555357b40a1SHerbert Xu csum_skb = skb;
5561da177e4SLinus Torvalds }
5571da177e4SLinus Torvalds
558357b40a1SHerbert Xu skb = csum_skb;
559357b40a1SHerbert Xu }
560357b40a1SHerbert Xu
561ea2ae17dSArnaldo Carvalho de Melo offset += skb_transport_offset(skb);
562a98f9175SDave Jones err = skb_copy_bits(skb, offset, &csum, 2);
563a98f9175SDave Jones if (err < 0) {
564a98f9175SDave Jones ip6_flush_pending_frames(sk);
565a98f9175SDave Jones goto out;
566a98f9175SDave Jones }
567357b40a1SHerbert Xu
5681da177e4SLinus Torvalds /* in case cksum was not initialized */
569357b40a1SHerbert Xu if (unlikely(csum))
5705f92a738SAl Viro tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
5711da177e4SLinus Torvalds
5724c9483b2SDavid S. Miller csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
5734c9483b2SDavid S. Miller total_len, fl6->flowi6_proto, tmp_csum);
5741da177e4SLinus Torvalds
5754c9483b2SDavid S. Miller if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
576f6ab0288SAl Viro csum = CSUM_MANGLED_0;
577357b40a1SHerbert Xu
5788242fc33SHimangi Saraogi BUG_ON(skb_store_bits(skb, offset, &csum, 2));
579357b40a1SHerbert Xu
5801da177e4SLinus Torvalds send:
5811da177e4SLinus Torvalds err = ip6_push_pending_frames(sk);
5821da177e4SLinus Torvalds out:
5831da177e4SLinus Torvalds return err;
5841da177e4SLinus Torvalds }
5851da177e4SLinus Torvalds
rawv6_send_hdrinc(struct sock * sk,struct msghdr * msg,int length,struct flowi6 * fl6,struct dst_entry ** dstp,unsigned int flags,const struct sockcm_cookie * sockc)586c3c1a7dbSAl Viro static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length,
5874c9483b2SDavid S. Miller struct flowi6 *fl6, struct dst_entry **dstp,
588a818f75eSJesus Sanchez-Palencia unsigned int flags, const struct sockcm_cookie *sockc)
5891da177e4SLinus Torvalds {
5903320da89SHerbert Xu struct ipv6_pinfo *np = inet6_sk(sk);
591adb28c9dSEric W. Biederman struct net *net = sock_net(sk);
5921da177e4SLinus Torvalds struct ipv6hdr *iph;
5931da177e4SLinus Torvalds struct sk_buff *skb;
5941da177e4SLinus Torvalds int err;
5951789a640SEric Dumazet struct rt6_info *rt = (struct rt6_info *)*dstp;
596a7ae1992SHerbert Xu int hlen = LL_RESERVED_SPACE(rt->dst.dev);
597a7ae1992SHerbert Xu int tlen = rt->dst.dev->needed_tailroom;
5981da177e4SLinus Torvalds
599d8d1f30bSChangli Gao if (length > rt->dst.dev->mtu) {
6004c9483b2SDavid S. Miller ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
6011da177e4SLinus Torvalds return -EMSGSIZE;
6021da177e4SLinus Torvalds }
60386f4c90aSAlexander Potapenko if (length < sizeof(struct ipv6hdr))
60486f4c90aSAlexander Potapenko return -EINVAL;
6051da177e4SLinus Torvalds if (flags&MSG_PROBE)
6061da177e4SLinus Torvalds goto out;
6071da177e4SLinus Torvalds
608f5184d26SJohannes Berg skb = sock_alloc_send_skb(sk,
609a7ae1992SHerbert Xu length + hlen + tlen + 15,
6101da177e4SLinus Torvalds flags & MSG_DONTWAIT, &err);
61163159f29SIan Morris if (!skb)
6121da177e4SLinus Torvalds goto error;
613a7ae1992SHerbert Xu skb_reserve(skb, hlen);
6141da177e4SLinus Torvalds
6159c9c9ad5SHannes Frederic Sowa skb->protocol = htons(ETH_P_IPV6);
6168bf43be7SEric Dumazet skb->priority = READ_ONCE(sk->sk_priority);
617c6af0c22SWillem de Bruijn skb->mark = sockc->mark;
618a818f75eSJesus Sanchez-Palencia skb->tstamp = sockc->transmit_time;
6191da177e4SLinus Torvalds
6201ced98e8SArnaldo Carvalho de Melo skb_put(skb, length);
6211ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb);
6220660e03fSArnaldo Carvalho de Melo iph = ipv6_hdr(skb);
6231da177e4SLinus Torvalds
6241da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_NONE;
6251da177e4SLinus Torvalds
6268f932f76SWillem de Bruijn skb_setup_tx_timestamp(skb, sockc->tsflags);
627fbfb2321SWillem de Bruijn
6280dec879fSJulian Anastasov if (flags & MSG_CONFIRM)
6290dec879fSJulian Anastasov skb_set_dst_pending_confirm(skb, 1);
6300dec879fSJulian Anastasov
631b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header;
63221226abbSAl Viro err = memcpy_from_msg(iph, msg, length);
633a688caa3SWei Wang if (err) {
634a688caa3SWei Wang err = -EFAULT;
635a688caa3SWei Wang kfree_skb(skb);
636a688caa3SWei Wang goto error;
637a688caa3SWei Wang }
638a688caa3SWei Wang
639a688caa3SWei Wang skb_dst_set(skb, &rt->dst);
640a688caa3SWei Wang *dstp = NULL;
6411da177e4SLinus Torvalds
642a8e3e1a9SDavid Ahern /* if egress device is enslaved to an L3 master device pass the
643a8e3e1a9SDavid Ahern * skb to its handler for processing
644a8e3e1a9SDavid Ahern */
645a8e3e1a9SDavid Ahern skb = l3mdev_ip6_out(sk, skb);
646a8e3e1a9SDavid Ahern if (unlikely(!skb))
647a8e3e1a9SDavid Ahern return 0;
648a8e3e1a9SDavid Ahern
649a688caa3SWei Wang /* Acquire rcu_read_lock() in case we need to use rt->rt6i_idev
650a688caa3SWei Wang * in the error path. Since skb has been freed, the dst could
651a688caa3SWei Wang * have been queued for deletion.
652a688caa3SWei Wang */
653a688caa3SWei Wang rcu_read_lock();
65456712f74SHeng Guo IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
65529a26a56SEric W. Biederman err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb,
65613206b6bSEric W. Biederman NULL, rt->dst.dev, dst_output);
6571da177e4SLinus Torvalds if (err > 0)
6586ce9e7b5SEric Dumazet err = net_xmit_errno(err);
659a688caa3SWei Wang if (err) {
660a688caa3SWei Wang IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
661a688caa3SWei Wang rcu_read_unlock();
662a688caa3SWei Wang goto error_check;
663a688caa3SWei Wang }
664a688caa3SWei Wang rcu_read_unlock();
6651da177e4SLinus Torvalds out:
6661da177e4SLinus Torvalds return 0;
6671da177e4SLinus Torvalds
6681da177e4SLinus Torvalds error:
669adb28c9dSEric W. Biederman IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
670a688caa3SWei Wang error_check:
6716ce9e7b5SEric Dumazet if (err == -ENOBUFS && !np->recverr)
6726ce9e7b5SEric Dumazet err = 0;
6731da177e4SLinus Torvalds return err;
6741da177e4SLinus Torvalds }
6751da177e4SLinus Torvalds
67619e3c66bSAl Viro struct raw6_frag_vec {
67719e3c66bSAl Viro struct msghdr *msg;
67819e3c66bSAl Viro int hlen;
67919e3c66bSAl Viro char c[4];
68019e3c66bSAl Viro };
68119e3c66bSAl Viro
rawv6_probe_proto_opt(struct raw6_frag_vec * rfv,struct flowi6 * fl6)68219e3c66bSAl Viro static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6)
6831da177e4SLinus Torvalds {
68419e3c66bSAl Viro int err = 0;
6854c9483b2SDavid S. Miller switch (fl6->flowi6_proto) {
6861da177e4SLinus Torvalds case IPPROTO_ICMPV6:
68719e3c66bSAl Viro rfv->hlen = 2;
68819e3c66bSAl Viro err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
68919e3c66bSAl Viro if (!err) {
69019e3c66bSAl Viro fl6->fl6_icmp_type = rfv->c[0];
69119e3c66bSAl Viro fl6->fl6_icmp_code = rfv->c[1];
6921da177e4SLinus Torvalds }
6931da177e4SLinus Torvalds break;
6946e8f4d48SMasahide NAKAMURA case IPPROTO_MH:
69519e3c66bSAl Viro rfv->hlen = 4;
69619e3c66bSAl Viro err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
69719e3c66bSAl Viro if (!err)
69819e3c66bSAl Viro fl6->fl6_mh_type = rfv->c[2];
69919e3c66bSAl Viro }
70019e3c66bSAl Viro return err;
70119e3c66bSAl Viro }
7026e8f4d48SMasahide NAKAMURA
raw6_getfrag(void * from,char * to,int offset,int len,int odd,struct sk_buff * skb)70319e3c66bSAl Viro static int raw6_getfrag(void *from, char *to, int offset, int len, int odd,
70419e3c66bSAl Viro struct sk_buff *skb)
70519e3c66bSAl Viro {
70619e3c66bSAl Viro struct raw6_frag_vec *rfv = from;
70719e3c66bSAl Viro
70819e3c66bSAl Viro if (offset < rfv->hlen) {
70919e3c66bSAl Viro int copy = min(rfv->hlen - offset, len);
71019e3c66bSAl Viro
71119e3c66bSAl Viro if (skb->ip_summed == CHECKSUM_PARTIAL)
71219e3c66bSAl Viro memcpy(to, rfv->c + offset, copy);
71319e3c66bSAl Viro else
71419e3c66bSAl Viro skb->csum = csum_block_add(
71519e3c66bSAl Viro skb->csum,
71619e3c66bSAl Viro csum_partial_copy_nocheck(rfv->c + offset,
717cc44c17bSAl Viro to, copy),
71819e3c66bSAl Viro odd);
71919e3c66bSAl Viro
72019e3c66bSAl Viro odd = 0;
72119e3c66bSAl Viro offset += copy;
72219e3c66bSAl Viro to += copy;
72319e3c66bSAl Viro len -= copy;
72419e3c66bSAl Viro
72519e3c66bSAl Viro if (!len)
726a27b58feSHeiko Carstens return 0;
7271da177e4SLinus Torvalds }
7281da177e4SLinus Torvalds
72919e3c66bSAl Viro offset -= rfv->hlen;
73019e3c66bSAl Viro
731f69e6d13SAl Viro return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
73219e3c66bSAl Viro }
73319e3c66bSAl Viro
rawv6_sendmsg(struct sock * sk,struct msghdr * msg,size_t len)7341b784140SYing Xue static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
7351da177e4SLinus Torvalds {
73645f6fad8SEric Dumazet struct ipv6_txoptions *opt_to_free = NULL;
7371da177e4SLinus Torvalds struct ipv6_txoptions opt_space;
738342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
73920c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final;
7401da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk);
7411da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk);
7421da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk);
7431da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL;
7441da177e4SLinus Torvalds struct ip6_flowlabel *flowlabel = NULL;
7451da177e4SLinus Torvalds struct dst_entry *dst = NULL;
74619e3c66bSAl Viro struct raw6_frag_vec rfv;
7474c9483b2SDavid S. Miller struct flowi6 fl6;
74826879da5SWei Wang struct ipcm6_cookie ipc6;
7491da177e4SLinus Torvalds int addr_len = msg->msg_namelen;
75059e3e4b5SOlivier Matz int hdrincl;
7511da177e4SLinus Torvalds u16 proto;
7521da177e4SLinus Torvalds int err;
7531da177e4SLinus Torvalds
7541da177e4SLinus Torvalds /* Rough check on arithmetic overflow,
755b59e139bSYOSHIFUJI Hideaki better check is made in ip6_append_data().
7561da177e4SLinus Torvalds */
757b59e139bSYOSHIFUJI Hideaki if (len > INT_MAX)
7581da177e4SLinus Torvalds return -EMSGSIZE;
7591da177e4SLinus Torvalds
7601da177e4SLinus Torvalds /* Mirror BSD error message compatibility */
7611da177e4SLinus Torvalds if (msg->msg_flags & MSG_OOB)
7621da177e4SLinus Torvalds return -EOPNOTSUPP;
7631da177e4SLinus Torvalds
764cafbe182SEric Dumazet hdrincl = inet_test_bit(HDRINCL, sk);
76559e3e4b5SOlivier Matz
7661da177e4SLinus Torvalds /*
7671da177e4SLinus Torvalds * Get and verify the address.
7681da177e4SLinus Torvalds */
7694c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6));
7701da177e4SLinus Torvalds
7713c5b4d69SEric Dumazet fl6.flowi6_mark = READ_ONCE(sk->sk_mark);
772e2d118a1SLorenzo Colitti fl6.flowi6_uid = sk->sk_uid;
7734a19ec58SLaszlo Attila Toth
774b515430aSWillem de Bruijn ipcm6_init(&ipc6);
775e3390b30SEric Dumazet ipc6.sockc.tsflags = READ_ONCE(sk->sk_tsflags);
7763c5b4d69SEric Dumazet ipc6.sockc.mark = fl6.flowi6_mark;
77726879da5SWei Wang
7781da177e4SLinus Torvalds if (sin6) {
7791da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133)
7801da177e4SLinus Torvalds return -EINVAL;
7811da177e4SLinus Torvalds
7821da177e4SLinus Torvalds if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
783a02cec21SEric Dumazet return -EAFNOSUPPORT;
7841da177e4SLinus Torvalds
7851da177e4SLinus Torvalds /* port is the proto value [0..255] carried in nexthdr */
7861da177e4SLinus Torvalds proto = ntohs(sin6->sin6_port);
7871da177e4SLinus Torvalds
7881da177e4SLinus Torvalds if (!proto)
789c720c7e8SEric Dumazet proto = inet->inet_num;
7903632679dSNicolas Dichtel else if (proto != inet->inet_num &&
7913632679dSNicolas Dichtel inet->inet_num != IPPROTO_RAW)
792a02cec21SEric Dumazet return -EINVAL;
7931da177e4SLinus Torvalds
7941da177e4SLinus Torvalds if (proto > 255)
795a02cec21SEric Dumazet return -EINVAL;
7961da177e4SLinus Torvalds
7971da177e4SLinus Torvalds daddr = &sin6->sin6_addr;
7981da177e4SLinus Torvalds if (np->sndflow) {
7994c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
8004c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
8014c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
80259c820b2SWillem de Bruijn if (IS_ERR(flowlabel))
8031da177e4SLinus Torvalds return -EINVAL;
8041da177e4SLinus Torvalds }
8051da177e4SLinus Torvalds }
8061da177e4SLinus Torvalds
8071da177e4SLinus Torvalds /*
8081da177e4SLinus Torvalds * Otherwise it will be difficult to maintain
8091da177e4SLinus Torvalds * sk->sk_dst_cache.
8101da177e4SLinus Torvalds */
8111da177e4SLinus Torvalds if (sk->sk_state == TCP_ESTABLISHED &&
812efe4208fSEric Dumazet ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
813efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr;
8141da177e4SLinus Torvalds
8151da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) &&
8161da177e4SLinus Torvalds sin6->sin6_scope_id &&
817842df073SHannes Frederic Sowa __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
8184c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id;
8191da177e4SLinus Torvalds } else {
8201da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED)
8211da177e4SLinus Torvalds return -EDESTADDRREQ;
8221da177e4SLinus Torvalds
823c720c7e8SEric Dumazet proto = inet->inet_num;
824efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr;
8254c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label;
8261da177e4SLinus Torvalds }
8271da177e4SLinus Torvalds
8284c9483b2SDavid S. Miller if (fl6.flowi6_oif == 0)
8294c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if;
8301da177e4SLinus Torvalds
8311da177e4SLinus Torvalds if (msg->msg_controllen) {
8321da177e4SLinus Torvalds opt = &opt_space;
8331da177e4SLinus Torvalds memset(opt, 0, sizeof(struct ipv6_txoptions));
8341da177e4SLinus Torvalds opt->tot_len = sizeof(struct ipv6_txoptions);
83526879da5SWei Wang ipc6.opt = opt;
8361da177e4SLinus Torvalds
8375fdaa88dSWillem de Bruijn err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6);
8381da177e4SLinus Torvalds if (err < 0) {
8391da177e4SLinus Torvalds fl6_sock_release(flowlabel);
8401da177e4SLinus Torvalds return err;
8411da177e4SLinus Torvalds }
8424c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
8434c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
84459c820b2SWillem de Bruijn if (IS_ERR(flowlabel))
8451da177e4SLinus Torvalds return -EINVAL;
8461da177e4SLinus Torvalds }
8471da177e4SLinus Torvalds if (!(opt->opt_nflen|opt->opt_flen))
8481da177e4SLinus Torvalds opt = NULL;
8491da177e4SLinus Torvalds }
85045f6fad8SEric Dumazet if (!opt) {
85145f6fad8SEric Dumazet opt = txopt_get(np);
85245f6fad8SEric Dumazet opt_to_free = opt;
85345f6fad8SEric Dumazet }
854df9890c3SYOSHIFUJI Hideaki if (flowlabel)
8551da177e4SLinus Torvalds opt = fl6_merge_options(&opt_space, flowlabel, opt);
856df9890c3SYOSHIFUJI Hideaki opt = ipv6_fixup_options(&opt_space, opt);
8571da177e4SLinus Torvalds
8584c9483b2SDavid S. Miller fl6.flowi6_proto = proto;
859c6af0c22SWillem de Bruijn fl6.flowi6_mark = ipc6.sockc.mark;
860b9aa52c4SOlivier Matz
861b9aa52c4SOlivier Matz if (!hdrincl) {
86219e3c66bSAl Viro rfv.msg = msg;
86319e3c66bSAl Viro rfv.hlen = 0;
86419e3c66bSAl Viro err = rawv6_probe_proto_opt(&rfv, &fl6);
865a27b58feSHeiko Carstens if (err)
866a27b58feSHeiko Carstens goto out;
867b9aa52c4SOlivier Matz }
8681da177e4SLinus Torvalds
869876c7f41SBrian Haley if (!ipv6_addr_any(daddr))
8704e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr;
871876c7f41SBrian Haley else
8724c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
8734c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
8744e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr;
8751da177e4SLinus Torvalds
8764c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final);
8771da177e4SLinus Torvalds
8784c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
8794c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif;
880c4062dfcSErich E. Hoover else if (!fl6.flowi6_oif)
881c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif;
8823df98d79SPaul Moore security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
8831da177e4SLinus Torvalds
88459e3e4b5SOlivier Matz if (hdrincl)
88548e8aa6eSMartin KaFai Lau fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH;
88648e8aa6eSMartin KaFai Lau
88738b7097bSHannes Frederic Sowa if (ipc6.tclass < 0)
88838b7097bSHannes Frederic Sowa ipc6.tclass = np->tclass;
88938b7097bSHannes Frederic Sowa
89038b7097bSHannes Frederic Sowa fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
89138b7097bSHannes Frederic Sowa
892c4e85f73SSabrina Dubroca dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
89368d0c6d3SDavid S. Miller if (IS_ERR(dst)) {
89468d0c6d3SDavid S. Miller err = PTR_ERR(dst);
8951da177e4SLinus Torvalds goto out;
89614e50e57SDavid S. Miller }
89726879da5SWei Wang if (ipc6.hlimit < 0)
89826879da5SWei Wang ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
8991da177e4SLinus Torvalds
90026879da5SWei Wang if (ipc6.dontfrag < 0)
90126879da5SWei Wang ipc6.dontfrag = np->dontfrag;
90213b52cd4SBrian Haley
9031da177e4SLinus Torvalds if (msg->msg_flags&MSG_CONFIRM)
9041da177e4SLinus Torvalds goto do_confirm;
9051da177e4SLinus Torvalds
9061da177e4SLinus Torvalds back_from_confirm:
90759e3e4b5SOlivier Matz if (hdrincl)
908a818f75eSJesus Sanchez-Palencia err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst,
9095fdaa88dSWillem de Bruijn msg->msg_flags, &ipc6.sockc);
9101789a640SEric Dumazet else {
91126879da5SWei Wang ipc6.opt = opt;
9121da177e4SLinus Torvalds lock_sock(sk);
91319e3c66bSAl Viro err = ip6_append_data(sk, raw6_getfrag, &rfv,
91426879da5SWei Wang len, 0, &ipc6, &fl6, (struct rt6_info *)dst,
9155fdaa88dSWillem de Bruijn msg->msg_flags);
9161da177e4SLinus Torvalds
9171da177e4SLinus Torvalds if (err)
9181da177e4SLinus Torvalds ip6_flush_pending_frames(sk);
9191da177e4SLinus Torvalds else if (!(msg->msg_flags & MSG_MORE))
9204c9483b2SDavid S. Miller err = rawv6_push_pending_frames(sk, &fl6, rp);
9213ef9d943SYOSHIFUJI Hideaki release_sock(sk);
9221da177e4SLinus Torvalds }
9231da177e4SLinus Torvalds done:
9246d3e85ecSNicolas DICHTEL dst_release(dst);
9251da177e4SLinus Torvalds out:
9261da177e4SLinus Torvalds fl6_sock_release(flowlabel);
92745f6fad8SEric Dumazet txopt_put(opt_to_free);
9281da177e4SLinus Torvalds return err < 0 ? err : len;
9291da177e4SLinus Torvalds do_confirm:
9300dec879fSJulian Anastasov if (msg->msg_flags & MSG_PROBE)
9310dec879fSJulian Anastasov dst_confirm_neigh(dst, &fl6.daddr);
9321da177e4SLinus Torvalds if (!(msg->msg_flags & MSG_PROBE) || len)
9331da177e4SLinus Torvalds goto back_from_confirm;
9341da177e4SLinus Torvalds err = 0;
9351da177e4SLinus Torvalds goto done;
9361da177e4SLinus Torvalds }
9371da177e4SLinus Torvalds
rawv6_seticmpfilter(struct sock * sk,int level,int optname,sockptr_t optval,int optlen)9381da177e4SLinus Torvalds static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
939a7b75c5aSChristoph Hellwig sockptr_t optval, int optlen)
9401da177e4SLinus Torvalds {
9411da177e4SLinus Torvalds switch (optname) {
9421da177e4SLinus Torvalds case ICMPV6_FILTER:
9431da177e4SLinus Torvalds if (optlen > sizeof(struct icmp6_filter))
9441da177e4SLinus Torvalds optlen = sizeof(struct icmp6_filter);
945a7b75c5aSChristoph Hellwig if (copy_from_sockptr(&raw6_sk(sk)->filter, optval, optlen))
9461da177e4SLinus Torvalds return -EFAULT;
9471da177e4SLinus Torvalds return 0;
9481da177e4SLinus Torvalds default:
9491da177e4SLinus Torvalds return -ENOPROTOOPT;
9503ff50b79SStephen Hemminger }
9511da177e4SLinus Torvalds
9521da177e4SLinus Torvalds return 0;
9531da177e4SLinus Torvalds }
9541da177e4SLinus Torvalds
rawv6_geticmpfilter(struct sock * sk,int level,int optname,char __user * optval,int __user * optlen)9551da177e4SLinus Torvalds static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
9561da177e4SLinus Torvalds char __user *optval, int __user *optlen)
9571da177e4SLinus Torvalds {
9581da177e4SLinus Torvalds int len;
9591da177e4SLinus Torvalds
9601da177e4SLinus Torvalds switch (optname) {
9611da177e4SLinus Torvalds case ICMPV6_FILTER:
9621da177e4SLinus Torvalds if (get_user(len, optlen))
9631da177e4SLinus Torvalds return -EFAULT;
9641da177e4SLinus Torvalds if (len < 0)
9651da177e4SLinus Torvalds return -EINVAL;
9661da177e4SLinus Torvalds if (len > sizeof(struct icmp6_filter))
9671da177e4SLinus Torvalds len = sizeof(struct icmp6_filter);
9681da177e4SLinus Torvalds if (put_user(len, optlen))
9691da177e4SLinus Torvalds return -EFAULT;
9701da177e4SLinus Torvalds if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
9711da177e4SLinus Torvalds return -EFAULT;
9721da177e4SLinus Torvalds return 0;
9731da177e4SLinus Torvalds default:
9741da177e4SLinus Torvalds return -ENOPROTOOPT;
9753ff50b79SStephen Hemminger }
9761da177e4SLinus Torvalds
9771da177e4SLinus Torvalds return 0;
9781da177e4SLinus Torvalds }
9791da177e4SLinus Torvalds
9801da177e4SLinus Torvalds
do_rawv6_setsockopt(struct sock * sk,int level,int optname,sockptr_t optval,unsigned int optlen)9813fdadf7dSDmitry Mishin static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
982a7b75c5aSChristoph Hellwig sockptr_t optval, unsigned int optlen)
9831da177e4SLinus Torvalds {
9841da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk);
9851da177e4SLinus Torvalds int val;
9861da177e4SLinus Torvalds
987fb7bc920STamir Duberstein if (optlen < sizeof(val))
988fb7bc920STamir Duberstein return -EINVAL;
989fb7bc920STamir Duberstein
990a7b75c5aSChristoph Hellwig if (copy_from_sockptr(&val, optval, sizeof(val)))
9911da177e4SLinus Torvalds return -EFAULT;
9921da177e4SLinus Torvalds
9931da177e4SLinus Torvalds switch (optname) {
994715f504bSHannes Frederic Sowa case IPV6_HDRINCL:
995715f504bSHannes Frederic Sowa if (sk->sk_type != SOCK_RAW)
996715f504bSHannes Frederic Sowa return -EINVAL;
997cafbe182SEric Dumazet inet_assign_bit(HDRINCL, sk, val);
998715f504bSHannes Frederic Sowa return 0;
9991da177e4SLinus Torvalds case IPV6_CHECKSUM:
1000c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
10011a98d05fSYOSHIFUJI Hideaki level == IPPROTO_IPV6) {
10021a98d05fSYOSHIFUJI Hideaki /*
10031a98d05fSYOSHIFUJI Hideaki * RFC3542 tells that IPV6_CHECKSUM socket
10041a98d05fSYOSHIFUJI Hideaki * option in the IPPROTO_IPV6 level is not
10051a98d05fSYOSHIFUJI Hideaki * allowed on ICMPv6 sockets.
10061a98d05fSYOSHIFUJI Hideaki * If you want to set it, use IPPROTO_RAW
10071a98d05fSYOSHIFUJI Hideaki * level IPV6_CHECKSUM socket option
10081a98d05fSYOSHIFUJI Hideaki * (Linux extension).
10091a98d05fSYOSHIFUJI Hideaki */
10101a98d05fSYOSHIFUJI Hideaki return -EINVAL;
10111a98d05fSYOSHIFUJI Hideaki }
10121a98d05fSYOSHIFUJI Hideaki
10131da177e4SLinus Torvalds /* You may get strange result with a positive odd offset;
10141da177e4SLinus Torvalds RFC2292bis agrees with me. */
10151da177e4SLinus Torvalds if (val > 0 && (val&1))
1016a02cec21SEric Dumazet return -EINVAL;
10171da177e4SLinus Torvalds if (val < 0) {
10181da177e4SLinus Torvalds rp->checksum = 0;
10191da177e4SLinus Torvalds } else {
10201da177e4SLinus Torvalds rp->checksum = 1;
10211da177e4SLinus Torvalds rp->offset = val;
10221da177e4SLinus Torvalds }
10231da177e4SLinus Torvalds
10241da177e4SLinus Torvalds return 0;
10251da177e4SLinus Torvalds
10261da177e4SLinus Torvalds default:
1027a02cec21SEric Dumazet return -ENOPROTOOPT;
10281da177e4SLinus Torvalds }
10291da177e4SLinus Torvalds }
10301da177e4SLinus Torvalds
rawv6_setsockopt(struct sock * sk,int level,int optname,sockptr_t optval,unsigned int optlen)10313fdadf7dSDmitry Mishin static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1032a7b75c5aSChristoph Hellwig sockptr_t optval, unsigned int optlen)
10331da177e4SLinus Torvalds {
10341da177e4SLinus Torvalds switch (level) {
10351da177e4SLinus Torvalds case SOL_RAW:
10361da177e4SLinus Torvalds break;
10371da177e4SLinus Torvalds
10381da177e4SLinus Torvalds case SOL_ICMPV6:
1039c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
10401da177e4SLinus Torvalds return -EOPNOTSUPP;
1041207ec0abSJoe Perches return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
10421da177e4SLinus Torvalds case SOL_IPV6:
1043715f504bSHannes Frederic Sowa if (optname == IPV6_CHECKSUM ||
1044715f504bSHannes Frederic Sowa optname == IPV6_HDRINCL)
10451da177e4SLinus Torvalds break;
1046a8eceea8SJoe Perches fallthrough;
10471da177e4SLinus Torvalds default:
1048207ec0abSJoe Perches return ipv6_setsockopt(sk, level, optname, optval, optlen);
10493ff50b79SStephen Hemminger }
10503ff50b79SStephen Hemminger
10513fdadf7dSDmitry Mishin return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
10523fdadf7dSDmitry Mishin }
10533fdadf7dSDmitry Mishin
do_rawv6_getsockopt(struct sock * sk,int level,int optname,char __user * optval,int __user * optlen)10543fdadf7dSDmitry Mishin static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
10553fdadf7dSDmitry Mishin char __user *optval, int __user *optlen)
10563fdadf7dSDmitry Mishin {
10573fdadf7dSDmitry Mishin struct raw6_sock *rp = raw6_sk(sk);
10583fdadf7dSDmitry Mishin int val, len;
10591da177e4SLinus Torvalds
10601da177e4SLinus Torvalds if (get_user(len, optlen))
10611da177e4SLinus Torvalds return -EFAULT;
10621da177e4SLinus Torvalds
10631da177e4SLinus Torvalds switch (optname) {
1064715f504bSHannes Frederic Sowa case IPV6_HDRINCL:
1065cafbe182SEric Dumazet val = inet_test_bit(HDRINCL, sk);
1066715f504bSHannes Frederic Sowa break;
10671da177e4SLinus Torvalds case IPV6_CHECKSUM:
10681a98d05fSYOSHIFUJI Hideaki /*
10691a98d05fSYOSHIFUJI Hideaki * We allow getsockopt() for IPPROTO_IPV6-level
10701a98d05fSYOSHIFUJI Hideaki * IPV6_CHECKSUM socket option on ICMPv6 sockets
10711a98d05fSYOSHIFUJI Hideaki * since RFC3542 is silent about it.
10721a98d05fSYOSHIFUJI Hideaki */
10731da177e4SLinus Torvalds if (rp->checksum == 0)
10741da177e4SLinus Torvalds val = -1;
10751da177e4SLinus Torvalds else
10761da177e4SLinus Torvalds val = rp->offset;
10771da177e4SLinus Torvalds break;
10781da177e4SLinus Torvalds
10791da177e4SLinus Torvalds default:
10801da177e4SLinus Torvalds return -ENOPROTOOPT;
10811da177e4SLinus Torvalds }
10821da177e4SLinus Torvalds
10831da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len);
10841da177e4SLinus Torvalds
10851da177e4SLinus Torvalds if (put_user(len, optlen))
10861da177e4SLinus Torvalds return -EFAULT;
10871da177e4SLinus Torvalds if (copy_to_user(optval, &val, len))
10881da177e4SLinus Torvalds return -EFAULT;
10891da177e4SLinus Torvalds return 0;
10901da177e4SLinus Torvalds }
10911da177e4SLinus Torvalds
rawv6_getsockopt(struct sock * sk,int level,int optname,char __user * optval,int __user * optlen)10923fdadf7dSDmitry Mishin static int rawv6_getsockopt(struct sock *sk, int level, int optname,
10933fdadf7dSDmitry Mishin char __user *optval, int __user *optlen)
10943fdadf7dSDmitry Mishin {
10953fdadf7dSDmitry Mishin switch (level) {
10963fdadf7dSDmitry Mishin case SOL_RAW:
10973fdadf7dSDmitry Mishin break;
10983fdadf7dSDmitry Mishin
10993fdadf7dSDmitry Mishin case SOL_ICMPV6:
1100c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
11013fdadf7dSDmitry Mishin return -EOPNOTSUPP;
1102207ec0abSJoe Perches return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
11033fdadf7dSDmitry Mishin case SOL_IPV6:
1104715f504bSHannes Frederic Sowa if (optname == IPV6_CHECKSUM ||
1105715f504bSHannes Frederic Sowa optname == IPV6_HDRINCL)
11063fdadf7dSDmitry Mishin break;
1107a8eceea8SJoe Perches fallthrough;
11083fdadf7dSDmitry Mishin default:
1109207ec0abSJoe Perches return ipv6_getsockopt(sk, level, optname, optval, optlen);
11103ff50b79SStephen Hemminger }
11113ff50b79SStephen Hemminger
11123fdadf7dSDmitry Mishin return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
11133fdadf7dSDmitry Mishin }
11143fdadf7dSDmitry Mishin
rawv6_ioctl(struct sock * sk,int cmd,int * karg)1115e1d001faSBreno Leitao static int rawv6_ioctl(struct sock *sk, int cmd, int *karg)
11161da177e4SLinus Torvalds {
11171da177e4SLinus Torvalds switch (cmd) {
1118207ec0abSJoe Perches case SIOCOUTQ: {
1119e1d001faSBreno Leitao *karg = sk_wmem_alloc_get(sk);
1120e1d001faSBreno Leitao return 0;
11211da177e4SLinus Torvalds }
1122207ec0abSJoe Perches case SIOCINQ: {
11231da177e4SLinus Torvalds struct sk_buff *skb;
11241da177e4SLinus Torvalds
1125e0f9f858SHerbert Xu spin_lock_bh(&sk->sk_receive_queue.lock);
11261da177e4SLinus Torvalds skb = skb_peek(&sk->sk_receive_queue);
112753b24b8fSIan Morris if (skb)
1128e1d001faSBreno Leitao *karg = skb->len;
1129e1d001faSBreno Leitao else
1130e1d001faSBreno Leitao *karg = 0;
1131e0f9f858SHerbert Xu spin_unlock_bh(&sk->sk_receive_queue.lock);
1132e1d001faSBreno Leitao return 0;
11331da177e4SLinus Torvalds }
11341da177e4SLinus Torvalds
11351da177e4SLinus Torvalds default:
11367bc570c8SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MROUTE
1137e1d001faSBreno Leitao return ip6mr_ioctl(sk, cmd, karg);
11387bc570c8SYOSHIFUJI Hideaki #else
11391da177e4SLinus Torvalds return -ENOIOCTLCMD;
11407bc570c8SYOSHIFUJI Hideaki #endif
11411da177e4SLinus Torvalds }
11421da177e4SLinus Torvalds }
11431da177e4SLinus Torvalds
1144e2d57766SDavid S. Miller #ifdef CONFIG_COMPAT
compat_rawv6_ioctl(struct sock * sk,unsigned int cmd,unsigned long arg)1145e2d57766SDavid S. Miller static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1146e2d57766SDavid S. Miller {
1147e2d57766SDavid S. Miller switch (cmd) {
1148e2d57766SDavid S. Miller case SIOCOUTQ:
1149e2d57766SDavid S. Miller case SIOCINQ:
1150e2d57766SDavid S. Miller return -ENOIOCTLCMD;
1151e2d57766SDavid S. Miller default:
1152e2d57766SDavid S. Miller #ifdef CONFIG_IPV6_MROUTE
1153e2d57766SDavid S. Miller return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1154e2d57766SDavid S. Miller #else
1155e2d57766SDavid S. Miller return -ENOIOCTLCMD;
1156e2d57766SDavid S. Miller #endif
1157e2d57766SDavid S. Miller }
1158e2d57766SDavid S. Miller }
1159e2d57766SDavid S. Miller #endif
1160e2d57766SDavid S. Miller
rawv6_close(struct sock * sk,long timeout)11611da177e4SLinus Torvalds static void rawv6_close(struct sock *sk, long timeout)
11621da177e4SLinus Torvalds {
1163c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1164725a8ff0SDenis V. Lunev ip6_ra_control(sk, -1);
11657bc570c8SYOSHIFUJI Hideaki ip6mr_sk_done(sk);
11661da177e4SLinus Torvalds sk_common_release(sk);
11671da177e4SLinus Torvalds }
11681da177e4SLinus Torvalds
raw6_destroy(struct sock * sk)11697d06b2e0SBrian Haley static void raw6_destroy(struct sock *sk)
117022dd4850SDenis V. Lunev {
117122dd4850SDenis V. Lunev lock_sock(sk);
117222dd4850SDenis V. Lunev ip6_flush_pending_frames(sk);
117322dd4850SDenis V. Lunev release_sock(sk);
117422dd4850SDenis V. Lunev }
117522dd4850SDenis V. Lunev
rawv6_init_sk(struct sock * sk)11761da177e4SLinus Torvalds static int rawv6_init_sk(struct sock *sk)
11771da177e4SLinus Torvalds {
11781da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk);
1179f48d5ff1SMasahide NAKAMURA
1180c720c7e8SEric Dumazet switch (inet_sk(sk)->inet_num) {
1181f48d5ff1SMasahide NAKAMURA case IPPROTO_ICMPV6:
11821da177e4SLinus Torvalds rp->checksum = 1;
11831da177e4SLinus Torvalds rp->offset = 2;
1184f48d5ff1SMasahide NAKAMURA break;
1185f48d5ff1SMasahide NAKAMURA case IPPROTO_MH:
1186f48d5ff1SMasahide NAKAMURA rp->checksum = 1;
1187f48d5ff1SMasahide NAKAMURA rp->offset = 4;
1188f48d5ff1SMasahide NAKAMURA break;
1189f48d5ff1SMasahide NAKAMURA default:
1190f48d5ff1SMasahide NAKAMURA break;
11911da177e4SLinus Torvalds }
1192a02cec21SEric Dumazet return 0;
11931da177e4SLinus Torvalds }
11941da177e4SLinus Torvalds
11951da177e4SLinus Torvalds struct proto rawv6_prot = {
11961da177e4SLinus Torvalds .name = "RAWv6",
11971da177e4SLinus Torvalds .owner = THIS_MODULE,
11981da177e4SLinus Torvalds .close = rawv6_close,
119922dd4850SDenis V. Lunev .destroy = raw6_destroy,
120082b276cdSHannes Frederic Sowa .connect = ip6_datagram_connect_v6_only,
1201286c72deSEric Dumazet .disconnect = __udp_disconnect,
12021da177e4SLinus Torvalds .ioctl = rawv6_ioctl,
12031da177e4SLinus Torvalds .init = rawv6_init_sk,
12041da177e4SLinus Torvalds .setsockopt = rawv6_setsockopt,
12051da177e4SLinus Torvalds .getsockopt = rawv6_getsockopt,
12061da177e4SLinus Torvalds .sendmsg = rawv6_sendmsg,
12071da177e4SLinus Torvalds .recvmsg = rawv6_recvmsg,
12081da177e4SLinus Torvalds .bind = rawv6_bind,
12091da177e4SLinus Torvalds .backlog_rcv = rawv6_rcv_skb,
1210fc8717baSPavel Emelyanov .hash = raw_hash_sk,
1211fc8717baSPavel Emelyanov .unhash = raw_unhash_sk,
12121da177e4SLinus Torvalds .obj_size = sizeof(struct raw6_sock),
1213f5f80e32SEric Dumazet .ipv6_pinfo_offset = offsetof(struct raw6_sock, inet6),
12148c2bc895SDavid Windsor .useroffset = offsetof(struct raw6_sock, filter),
12158c2bc895SDavid Windsor .usersize = sizeof_field(struct raw6_sock, filter),
1216fc8717baSPavel Emelyanov .h.raw_hash = &raw_v6_hashinfo,
1217543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT
1218e2d57766SDavid S. Miller .compat_ioctl = compat_rawv6_ioctl,
1219543d9cfeSArnaldo Carvalho de Melo #endif
1220432490f9SCyrill Gorcunov .diag_destroy = raw_abort,
12211da177e4SLinus Torvalds };
12221da177e4SLinus Torvalds
12231da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS
raw6_seq_show(struct seq_file * seq,void * v)12241da177e4SLinus Torvalds static int raw6_seq_show(struct seq_file *seq, void *v)
12251da177e4SLinus Torvalds {
122617ef66afSLorenzo Colitti if (v == SEQ_START_TOKEN) {
122717ef66afSLorenzo Colitti seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
122817ef66afSLorenzo Colitti } else {
122917ef66afSLorenzo Colitti struct sock *sp = v;
123017ef66afSLorenzo Colitti __u16 srcp = inet_sk(sp)->inet_num;
123117ef66afSLorenzo Colitti ip6_dgram_sock_seq_show(seq, v, srcp, 0,
123217ef66afSLorenzo Colitti raw_seq_private(seq)->bucket);
123317ef66afSLorenzo Colitti }
12341da177e4SLinus Torvalds return 0;
12351da177e4SLinus Torvalds }
12361da177e4SLinus Torvalds
123756b3d975SPhilippe De Muyter static const struct seq_operations raw6_seq_ops = {
123842a73808SPavel Emelyanov .start = raw_seq_start,
123942a73808SPavel Emelyanov .next = raw_seq_next,
124042a73808SPavel Emelyanov .stop = raw_seq_stop,
12411da177e4SLinus Torvalds .show = raw6_seq_show,
12421da177e4SLinus Torvalds };
12431da177e4SLinus Torvalds
raw6_init_net(struct net * net)12442c8c1e72SAlexey Dobriyan static int __net_init raw6_init_net(struct net *net)
1245a308da16SPavel Emelyanov {
1246c3506372SChristoph Hellwig if (!proc_create_net_data("raw6", 0444, net->proc_net, &raw6_seq_ops,
1247c3506372SChristoph Hellwig sizeof(struct raw_iter_state), &raw_v6_hashinfo))
1248a308da16SPavel Emelyanov return -ENOMEM;
1249a308da16SPavel Emelyanov
1250a308da16SPavel Emelyanov return 0;
1251a308da16SPavel Emelyanov }
1252a308da16SPavel Emelyanov
raw6_exit_net(struct net * net)12532c8c1e72SAlexey Dobriyan static void __net_exit raw6_exit_net(struct net *net)
1254a308da16SPavel Emelyanov {
1255ece31ffdSGao feng remove_proc_entry("raw6", net->proc_net);
1256a308da16SPavel Emelyanov }
1257a308da16SPavel Emelyanov
1258a308da16SPavel Emelyanov static struct pernet_operations raw6_net_ops = {
1259a308da16SPavel Emelyanov .init = raw6_init_net,
1260a308da16SPavel Emelyanov .exit = raw6_exit_net,
1261a308da16SPavel Emelyanov };
1262a308da16SPavel Emelyanov
raw6_proc_init(void)12631da177e4SLinus Torvalds int __init raw6_proc_init(void)
12641da177e4SLinus Torvalds {
1265a308da16SPavel Emelyanov return register_pernet_subsys(&raw6_net_ops);
12661da177e4SLinus Torvalds }
12671da177e4SLinus Torvalds
raw6_proc_exit(void)12681da177e4SLinus Torvalds void raw6_proc_exit(void)
12691da177e4SLinus Torvalds {
1270a308da16SPavel Emelyanov unregister_pernet_subsys(&raw6_net_ops);
12711da177e4SLinus Torvalds }
12721da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */
12737f4e4868SDaniel Lezcano
1274a11e1d43SLinus Torvalds /* Same as inet6_dgram_ops, sans udp_poll. */
127577d4b1d3SEric Dumazet const struct proto_ops inet6_sockraw_ops = {
12767f4e4868SDaniel Lezcano .family = PF_INET6,
12777f4e4868SDaniel Lezcano .owner = THIS_MODULE,
12787f4e4868SDaniel Lezcano .release = inet6_release,
12797f4e4868SDaniel Lezcano .bind = inet6_bind,
12807f4e4868SDaniel Lezcano .connect = inet_dgram_connect, /* ok */
12817f4e4868SDaniel Lezcano .socketpair = sock_no_socketpair, /* a do nothing */
12827f4e4868SDaniel Lezcano .accept = sock_no_accept, /* a do nothing */
12837f4e4868SDaniel Lezcano .getname = inet6_getname,
1284a11e1d43SLinus Torvalds .poll = datagram_poll, /* ok */
12857f4e4868SDaniel Lezcano .ioctl = inet6_ioctl, /* must change */
1286c7cbdbf2SArnd Bergmann .gettstamp = sock_gettstamp,
12877f4e4868SDaniel Lezcano .listen = sock_no_listen, /* ok */
12887f4e4868SDaniel Lezcano .shutdown = inet_shutdown, /* ok */
12897f4e4868SDaniel Lezcano .setsockopt = sock_common_setsockopt, /* ok */
12907f4e4868SDaniel Lezcano .getsockopt = sock_common_getsockopt, /* ok */
12917f4e4868SDaniel Lezcano .sendmsg = inet_sendmsg, /* ok */
12927f4e4868SDaniel Lezcano .recvmsg = sock_common_recvmsg, /* ok */
12937f4e4868SDaniel Lezcano .mmap = sock_no_mmap,
12947f4e4868SDaniel Lezcano #ifdef CONFIG_COMPAT
12953986912fSChristoph Hellwig .compat_ioctl = inet6_compat_ioctl,
12967f4e4868SDaniel Lezcano #endif
12977f4e4868SDaniel Lezcano };
12987f4e4868SDaniel Lezcano
12997f4e4868SDaniel Lezcano static struct inet_protosw rawv6_protosw = {
13007f4e4868SDaniel Lezcano .type = SOCK_RAW,
13017f4e4868SDaniel Lezcano .protocol = IPPROTO_IP, /* wild card */
13027f4e4868SDaniel Lezcano .prot = &rawv6_prot,
13037f4e4868SDaniel Lezcano .ops = &inet6_sockraw_ops,
13047f4e4868SDaniel Lezcano .flags = INET_PROTOSW_REUSE,
13057f4e4868SDaniel Lezcano };
13067f4e4868SDaniel Lezcano
rawv6_init(void)13077f4e4868SDaniel Lezcano int __init rawv6_init(void)
13087f4e4868SDaniel Lezcano {
13093d2f6d41SJulia Lawall return inet6_register_protosw(&rawv6_protosw);
13107f4e4868SDaniel Lezcano }
13117f4e4868SDaniel Lezcano
rawv6_exit(void)131209f7709fSDaniel Lezcano void rawv6_exit(void)
13137f4e4868SDaniel Lezcano {
13147f4e4868SDaniel Lezcano inet6_unregister_protosw(&rawv6_protosw);
13157f4e4868SDaniel Lezcano }
1316