aboutsummaryrefslogtreecommitdiff
path: root/net/ipv6/datagram.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv6/datagram.c')
-rw-r--r--net/ipv6/datagram.c214
1 files changed, 142 insertions, 72 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index e2480691c22..c3bf2d2e519 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -22,6 +22,7 @@
#include <linux/ipv6.h>
#include <linux/route.h>
#include <linux/slab.h>
+#include <linux/export.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
@@ -29,13 +30,14 @@
#include <net/transp_v6.h>
#include <net/ip6_route.h>
#include <net/tcp_states.h>
+#include <net/dsfield.h>
#include <linux/errqueue.h>
#include <asm/uaccess.h>
-static inline int ipv6_mapped_addr_any(const struct in6_addr *a)
+static bool ipv6_mapped_addr_any(const struct in6_addr *a)
{
- return (ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0));
+ return ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0);
}
int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
@@ -71,7 +73,6 @@ int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
if (flowlabel == NULL)
return -EINVAL;
- ipv6_addr_copy(&usin->sin6_addr, &flowlabel->dst);
}
}
@@ -98,23 +99,23 @@ int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
sin.sin_port = usin->sin6_port;
err = ip4_datagram_connect(sk,
- (struct sockaddr*) &sin,
+ (struct sockaddr *) &sin,
sizeof(sin));
ipv4_connected:
if (err)
goto out;
- ipv6_addr_set_v4mapped(inet->inet_daddr, &np->daddr);
+ ipv6_addr_set_v4mapped(inet->inet_daddr, &sk->sk_v6_daddr);
if (ipv6_addr_any(&np->saddr) ||
ipv6_mapped_addr_any(&np->saddr))
ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr);
- if (ipv6_addr_any(&np->rcv_saddr) ||
- ipv6_mapped_addr_any(&np->rcv_saddr)) {
+ if (ipv6_addr_any(&sk->sk_v6_rcv_saddr) ||
+ ipv6_mapped_addr_any(&sk->sk_v6_rcv_saddr)) {
ipv6_addr_set_v4mapped(inet->inet_rcv_saddr,
- &np->rcv_saddr);
+ &sk->sk_v6_rcv_saddr);
if (sk->sk_prot->rehash)
sk->sk_prot->rehash(sk);
}
@@ -122,7 +123,7 @@ ipv4_connected:
goto out;
}
- if (addr_type&IPV6_ADDR_LINKLOCAL) {
+ if (__ipv6_addr_needs_scope_id(addr_type)) {
if (addr_len >= sizeof(struct sockaddr_in6) &&
usin->sin6_scope_id) {
if (sk->sk_bound_dev_if &&
@@ -143,7 +144,7 @@ ipv4_connected:
}
}
- ipv6_addr_copy(&np->daddr, daddr);
+ sk->sk_v6_daddr = *daddr;
np->flow_label = fl6.flowlabel;
inet->inet_dport = usin->sin6_port;
@@ -154,8 +155,8 @@ ipv4_connected:
*/
fl6.flowi6_proto = sk->sk_protocol;
- ipv6_addr_copy(&fl6.daddr, &np->daddr);
- ipv6_addr_copy(&fl6.saddr, &np->saddr);
+ fl6.daddr = sk->sk_v6_daddr;
+ fl6.saddr = np->saddr;
fl6.flowi6_oif = sk->sk_bound_dev_if;
fl6.flowi6_mark = sk->sk_mark;
fl6.fl6_dport = inet->inet_dport;
@@ -169,7 +170,7 @@ ipv4_connected:
opt = flowlabel ? flowlabel->opt : np->opt;
final_p = fl6_update_dst(&fl6, opt, &final);
- dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
+ dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
err = 0;
if (IS_ERR(dst)) {
err = PTR_ERR(dst);
@@ -179,18 +180,18 @@ ipv4_connected:
/* source address lookup done in ip6_dst_lookup */
if (ipv6_addr_any(&np->saddr))
- ipv6_addr_copy(&np->saddr, &fl6.saddr);
+ np->saddr = fl6.saddr;
- if (ipv6_addr_any(&np->rcv_saddr)) {
- ipv6_addr_copy(&np->rcv_saddr, &fl6.saddr);
+ if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
+ sk->sk_v6_rcv_saddr = fl6.saddr;
inet->inet_rcv_saddr = LOOPBACK4_IPV6;
if (sk->sk_prot->rehash)
sk->sk_prot->rehash(sk);
}
ip6_dst_store(sk, dst,
- ipv6_addr_equal(&fl6.daddr, &np->daddr) ?
- &np->daddr : NULL,
+ ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ?
+ &sk->sk_v6_daddr : NULL,
#ifdef CONFIG_IPV6_SUBTREES
ipv6_addr_equal(&fl6.saddr, &np->saddr) ?
&np->saddr :
@@ -202,6 +203,17 @@ out:
fl6_sock_release(flowlabel);
return err;
}
+EXPORT_SYMBOL_GPL(ip6_datagram_connect);
+
+int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *uaddr,
+ int addr_len)
+{
+ DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, uaddr);
+ if (sin6->sin6_family != AF_INET6)
+ return -EAFNOSUPPORT;
+ return ip6_datagram_connect(sk, uaddr, addr_len);
+}
+EXPORT_SYMBOL_GPL(ip6_datagram_connect_v6_only);
void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
__be16 port, u32 info, u8 *payload)
@@ -257,7 +269,7 @@ void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info)
skb_put(skb, sizeof(struct ipv6hdr));
skb_reset_network_header(skb);
iph = ipv6_hdr(skb);
- ipv6_addr_copy(&iph->daddr, &fl6->daddr);
+ iph->daddr = fl6->daddr;
serr = SKB_EXT_ERR(skb);
serr->ee.ee_errno = err;
@@ -294,7 +306,7 @@ void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu)
skb_put(skb, sizeof(struct ipv6hdr));
skb_reset_network_header(skb);
iph = ipv6_hdr(skb);
- ipv6_addr_copy(&iph->daddr, &fl6->daddr);
+ iph->daddr = fl6->daddr;
mtu_info = IP6CBMTU(skb);
@@ -303,7 +315,7 @@ void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu)
mtu_info->ip6m_addr.sin6_port = 0;
mtu_info->ip6m_addr.sin6_flowinfo = 0;
mtu_info->ip6m_addr.sin6_scope_id = fl6->flowi6_oif;
- ipv6_addr_copy(&mtu_info->ip6m_addr.sin6_addr, &ipv6_hdr(skb)->daddr);
+ mtu_info->ip6m_addr.sin6_addr = ipv6_hdr(skb)->daddr;
__skb_pull(skb, skb_tail_pointer(skb) - skb->data);
skb_reset_transport_header(skb);
@@ -315,12 +327,12 @@ void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu)
/*
* Handle MSG_ERRQUEUE
*/
-int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
+int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sock_exterr_skb *serr;
struct sk_buff *skb, *skb2;
- struct sockaddr_in6 *sin;
+ DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name);
struct {
struct sock_extended_err ee;
struct sockaddr_in6 offender;
@@ -346,26 +358,26 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
serr = SKB_EXT_ERR(skb);
- sin = (struct sockaddr_in6 *)msg->msg_name;
if (sin) {
const unsigned char *nh = skb_network_header(skb);
sin->sin6_family = AF_INET6;
sin->sin6_flowinfo = 0;
sin->sin6_port = serr->port;
- sin->sin6_scope_id = 0;
if (skb->protocol == htons(ETH_P_IPV6)) {
- ipv6_addr_copy(&sin->sin6_addr,
- (struct in6_addr *)(nh + serr->addr_offset));
+ const struct ipv6hdr *ip6h = container_of((struct in6_addr *)(nh + serr->addr_offset),
+ struct ipv6hdr, daddr);
+ sin->sin6_addr = ip6h->daddr;
if (np->sndflow)
- sin->sin6_flowinfo =
- (*(__be32 *)(nh + serr->addr_offset - 24) &
- IPV6_FLOWINFO_MASK);
- if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
- sin->sin6_scope_id = IP6CB(skb)->iif;
+ sin->sin6_flowinfo = ip6_flowinfo(ip6h);
+ sin->sin6_scope_id =
+ ipv6_iface_scope_id(&sin->sin6_addr,
+ IP6CB(skb)->iif);
} else {
ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset),
&sin->sin6_addr);
+ sin->sin6_scope_id = 0;
}
+ *addr_len = sizeof(*sin);
}
memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
@@ -374,18 +386,22 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL) {
sin->sin6_family = AF_INET6;
sin->sin6_flowinfo = 0;
- sin->sin6_scope_id = 0;
+ sin->sin6_port = 0;
+ if (np->rxopt.all)
+ ip6_datagram_recv_common_ctl(sk, msg, skb);
if (skb->protocol == htons(ETH_P_IPV6)) {
- ipv6_addr_copy(&sin->sin6_addr, &ipv6_hdr(skb)->saddr);
+ sin->sin6_addr = ipv6_hdr(skb)->saddr;
if (np->rxopt.all)
- datagram_recv_ctl(sk, msg, skb);
- if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
- sin->sin6_scope_id = IP6CB(skb)->iif;
+ ip6_datagram_recv_specific_ctl(sk, msg, skb);
+ sin->sin6_scope_id =
+ ipv6_iface_scope_id(&sin->sin6_addr,
+ IP6CB(skb)->iif);
} else {
struct inet_sock *inet = inet_sk(sk);
ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr,
&sin->sin6_addr);
+ sin->sin6_scope_id = 0;
if (inet->cmsg_flags)
ip_cmsg_recv(msg, skb);
}
@@ -414,16 +430,18 @@ out_free_skb:
out:
return err;
}
+EXPORT_SYMBOL_GPL(ipv6_recv_error);
/*
* Handle IPV6_RECVPATHMTU
*/
-int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len)
+int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len,
+ int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
- struct sockaddr_in6 *sin;
struct ip6_mtuinfo mtu_info;
+ DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name);
int err;
int copied;
@@ -445,13 +463,13 @@ int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len)
memcpy(&mtu_info, IP6CBMTU(skb), sizeof(mtu_info));
- sin = (struct sockaddr_in6 *)msg->msg_name;
if (sin) {
sin->sin6_family = AF_INET6;
sin->sin6_flowinfo = 0;
sin->sin6_port = 0;
sin->sin6_scope_id = mtu_info.ip6m_addr.sin6_scope_id;
- ipv6_addr_copy(&sin->sin6_addr, &mtu_info.ip6m_addr.sin6_addr);
+ sin->sin6_addr = mtu_info.ip6m_addr.sin6_addr;
+ *addr_len = sizeof(*sin);
}
put_cmsg(msg, SOL_IPV6, IPV6_PATHMTU, sizeof(mtu_info), &mtu_info);
@@ -465,19 +483,34 @@ out:
}
-int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
+void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg,
+ struct sk_buff *skb)
{
struct ipv6_pinfo *np = inet6_sk(sk);
- struct inet6_skb_parm *opt = IP6CB(skb);
- unsigned char *nh = skb_network_header(skb);
+ bool is_ipv6 = skb->protocol == htons(ETH_P_IPV6);
if (np->rxopt.bits.rxinfo) {
struct in6_pktinfo src_info;
- src_info.ipi6_ifindex = opt->iif;
- ipv6_addr_copy(&src_info.ipi6_addr, &ipv6_hdr(skb)->daddr);
+ if (is_ipv6) {
+ src_info.ipi6_ifindex = IP6CB(skb)->iif;
+ src_info.ipi6_addr = ipv6_hdr(skb)->daddr;
+ } else {
+ src_info.ipi6_ifindex =
+ PKTINFO_SKB_CB(skb)->ipi_ifindex;
+ ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
+ &src_info.ipi6_addr);
+ }
put_cmsg(msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
}
+}
+
+void ip6_datagram_recv_specific_ctl(struct sock *sk, struct msghdr *msg,
+ struct sk_buff *skb)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct inet6_skb_parm *opt = IP6CB(skb);
+ unsigned char *nh = skb_network_header(skb);
if (np->rxopt.bits.rxhlim) {
int hlim = ipv6_hdr(skb)->hop_limit;
@@ -485,13 +518,14 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
}
if (np->rxopt.bits.rxtclass) {
- int tclass = (ntohl(*(__be32 *)ipv6_hdr(skb)) >> 20) & 0xff;
+ int tclass = ipv6_get_dsfield(ipv6_hdr(skb));
put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);
}
- if (np->rxopt.bits.rxflow && (*(__be32 *)nh & IPV6_FLOWINFO_MASK)) {
- __be32 flowinfo = *(__be32 *)nh & IPV6_FLOWINFO_MASK;
- put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
+ if (np->rxopt.bits.rxflow) {
+ __be32 flowinfo = ip6_flowinfo((struct ipv6hdr *)nh);
+ if (flowinfo)
+ put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
}
/* HbH is allowed only once */
@@ -515,10 +549,10 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
u8 nexthdr = ipv6_hdr(skb)->nexthdr;
while (off <= opt->lastopt) {
- unsigned len;
+ unsigned int len;
u8 *ptr = nh + off;
- switch(nexthdr) {
+ switch (nexthdr) {
case IPPROTO_DSTOPTS:
nexthdr = ptr[0];
len = (ptr[1] + 1) << 3;
@@ -550,7 +584,7 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
struct in6_pktinfo src_info;
src_info.ipi6_ifindex = opt->iif;
- ipv6_addr_copy(&src_info.ipi6_addr, &ipv6_hdr(skb)->daddr);
+ src_info.ipi6_addr = ipv6_hdr(skb)->daddr;
put_cmsg(msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
}
if (np->rxopt.bits.rxohlim) {
@@ -575,7 +609,7 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
}
if (np->rxopt.bits.rxorigdstaddr) {
struct sockaddr_in6 sin6;
- u16 *ports = (u16 *) skb_transport_header(skb);
+ __be16 *ports = (__be16 *) skb_transport_header(skb);
if (skb_transport_offset(skb) + 4 <= skb->len) {
/* All current transport protocols have the port numbers in the
@@ -584,21 +618,30 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
*/
sin6.sin6_family = AF_INET6;
- ipv6_addr_copy(&sin6.sin6_addr, &ipv6_hdr(skb)->daddr);
+ sin6.sin6_addr = ipv6_hdr(skb)->daddr;
sin6.sin6_port = ports[1];
sin6.sin6_flowinfo = 0;
- sin6.sin6_scope_id = 0;
+ sin6.sin6_scope_id =
+ ipv6_iface_scope_id(&ipv6_hdr(skb)->daddr,
+ opt->iif);
put_cmsg(msg, SOL_IPV6, IPV6_ORIGDSTADDR, sizeof(sin6), &sin6);
}
}
- return 0;
}
-int datagram_send_ctl(struct net *net, struct sock *sk,
- struct msghdr *msg, struct flowi6 *fl6,
- struct ipv6_txoptions *opt,
- int *hlimit, int *tclass, int *dontfrag)
+void ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
+ struct sk_buff *skb)
+{
+ ip6_datagram_recv_common_ctl(sk, msg, skb);
+ ip6_datagram_recv_specific_ctl(sk, msg, skb);
+}
+EXPORT_SYMBOL_GPL(ip6_datagram_recv_ctl);
+
+int ip6_datagram_send_ctl(struct net *net, struct sock *sk,
+ struct msghdr *msg, struct flowi6 *fl6,
+ struct ipv6_txoptions *opt,
+ int *hlimit, int *tclass, int *dontfrag)
{
struct in6_pktinfo *src_info;
struct cmsghdr *cmsg;
@@ -654,12 +697,14 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
if (addr_type != IPV6_ADDR_ANY) {
int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL;
- if (!inet_sk(sk)->transparent &&
+ if (!(inet_sk(sk)->freebind || inet_sk(sk)->transparent) &&
!ipv6_chk_addr(net, &src_info->ipi6_addr,
- strict ? dev : NULL, 0))
+ strict ? dev : NULL, 0) &&
+ !ipv6_chk_acast_addr_src(net, dev,
+ &src_info->ipi6_addr))
err = -EINVAL;
else
- ipv6_addr_copy(&fl6->saddr, &src_info->ipi6_addr);
+ fl6->saddr = src_info->ipi6_addr;
}
rcu_read_unlock();
@@ -698,7 +743,7 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
err = -EINVAL;
goto exit_f;
}
- if (!capable(CAP_NET_RAW)) {
+ if (!ns_capable(net->user_ns, CAP_NET_RAW)) {
err = -EPERM;
goto exit_f;
}
@@ -718,7 +763,7 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
err = -EINVAL;
goto exit_f;
}
- if (!capable(CAP_NET_RAW)) {
+ if (!ns_capable(net->user_ns, CAP_NET_RAW)) {
err = -EPERM;
goto exit_f;
}
@@ -743,7 +788,7 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
err = -EINVAL;
goto exit_f;
}
- if (!capable(CAP_NET_RAW)) {
+ if (!ns_capable(net->user_ns, CAP_NET_RAW)) {
err = -EPERM;
goto exit_f;
}
@@ -766,7 +811,7 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
rthdr = (struct ipv6_rt_hdr *)CMSG_DATA(cmsg);
switch (rthdr->type) {
-#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
case IPV6_SRCRT_TYPE_2:
if (rthdr->hdrlen != 2 ||
rthdr->segments_left != 1) {
@@ -827,9 +872,8 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
int tc;
err = -EINVAL;
- if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) {
+ if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)))
goto exit_f;
- }
tc = *(int *)CMSG_DATA(cmsg);
if (tc < -1 || tc > 0xff)
@@ -846,9 +890,8 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
int df;
err = -EINVAL;
- if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) {
+ if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)))
goto exit_f;
- }
df = *(int *)CMSG_DATA(cmsg);
if (df < 0 || df > 1)
@@ -870,3 +913,30 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
exit_f:
return err;
}
+EXPORT_SYMBOL_GPL(ip6_datagram_send_ctl);
+
+void ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp,
+ __u16 srcp, __u16 destp, int bucket)
+{
+ const struct in6_addr *dest, *src;
+
+ dest = &sp->sk_v6_daddr;
+ src = &sp->sk_v6_rcv_saddr;
+ seq_printf(seq,
+ "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
+ "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n",
+ bucket,
+ src->s6_addr32[0], src->s6_addr32[1],
+ src->s6_addr32[2], src->s6_addr32[3], srcp,
+ dest->s6_addr32[0], dest->s6_addr32[1],
+ dest->s6_addr32[2], dest->s6_addr32[3], destp,
+ sp->sk_state,
+ sk_wmem_alloc_get(sp),
+ sk_rmem_alloc_get(sp),
+ 0, 0L, 0,
+ from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
+ 0,
+ sock_i_ino(sp),
+ atomic_read(&sp->sk_refcnt), sp,
+ atomic_read(&sp->sk_drops));
+}