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Diffstat (limited to 'net/ipv4/raw.c')
-rw-r--r--net/ipv4/raw.c92
1 files changed, 49 insertions, 43 deletions
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index bceaec42c37..11e1780455f 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -154,7 +154,7 @@ static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb)
* RFC 1122: SHOULD pass TOS value up to the transport layer.
* -> It does. And not only TOS, but all IP header.
*/
-static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
+static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
{
struct sock *sk;
struct hlist_head *head;
@@ -247,7 +247,7 @@ static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
}
if (inet->recverr) {
- struct iphdr *iph = (struct iphdr *)skb->data;
+ const struct iphdr *iph = (const struct iphdr *)skb->data;
u8 *payload = skb->data + (iph->ihl << 2);
if (inet->hdrincl)
@@ -265,7 +265,7 @@ void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
{
int hash;
struct sock *raw_sk;
- struct iphdr *iph;
+ const struct iphdr *iph;
struct net *net;
hash = protocol & (RAW_HTABLE_SIZE - 1);
@@ -273,7 +273,7 @@ void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
read_lock(&raw_v4_hashinfo.lock);
raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
if (raw_sk != NULL) {
- iph = (struct iphdr *)skb->data;
+ iph = (const struct iphdr *)skb->data;
net = dev_net(skb->dev);
while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
@@ -281,7 +281,7 @@ void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
skb->dev->ifindex)) != NULL) {
raw_err(raw_sk, skb, info);
raw_sk = sk_next(raw_sk);
- iph = (struct iphdr *)skb->data;
+ iph = (const struct iphdr *)skb->data;
}
}
read_unlock(&raw_v4_hashinfo.lock);
@@ -314,9 +314,10 @@ int raw_rcv(struct sock *sk, struct sk_buff *skb)
return 0;
}
-static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
- struct rtable **rtp,
- unsigned int flags)
+static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
+ void *from, size_t length,
+ struct rtable **rtp,
+ unsigned int flags)
{
struct inet_sock *inet = inet_sk(sk);
struct net *net = sock_net(sk);
@@ -327,7 +328,7 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
struct rtable *rt = *rtp;
if (length > rt->dst.dev->mtu) {
- ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->inet_dport,
+ ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
rt->dst.dev->mtu);
return -EMSGSIZE;
}
@@ -372,7 +373,7 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
if (iphlen >= sizeof(*iph)) {
if (!iph->saddr)
- iph->saddr = rt->rt_src;
+ iph->saddr = fl4->saddr;
iph->check = 0;
iph->tot_len = htons(length);
if (!iph->id)
@@ -455,11 +456,13 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
struct inet_sock *inet = inet_sk(sk);
struct ipcm_cookie ipc;
struct rtable *rt = NULL;
+ struct flowi4 fl4;
int free = 0;
__be32 daddr;
__be32 saddr;
u8 tos;
int err;
+ struct ip_options_data opt_copy;
err = -EMSGSIZE;
if (len > 0xFFFF)
@@ -520,8 +523,18 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
saddr = ipc.addr;
ipc.addr = daddr;
- if (!ipc.opt)
- ipc.opt = inet->opt;
+ if (!ipc.opt) {
+ struct ip_options_rcu *inet_opt;
+
+ rcu_read_lock();
+ inet_opt = rcu_dereference(inet->inet_opt);
+ if (inet_opt) {
+ memcpy(&opt_copy, inet_opt,
+ sizeof(*inet_opt) + inet_opt->opt.optlen);
+ ipc.opt = &opt_copy.opt;
+ }
+ rcu_read_unlock();
+ }
if (ipc.opt) {
err = -EINVAL;
@@ -530,10 +543,10 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
*/
if (inet->hdrincl)
goto done;
- if (ipc.opt->srr) {
+ if (ipc.opt->opt.srr) {
if (!daddr)
goto done;
- daddr = ipc.opt->faddr;
+ daddr = ipc.opt->opt.faddr;
}
}
tos = RT_CONN_FLAGS(sk);
@@ -547,31 +560,23 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
saddr = inet->mc_addr;
}
- {
- struct flowi4 fl4 = {
- .flowi4_oif = ipc.oif,
- .flowi4_mark = sk->sk_mark,
- .daddr = daddr,
- .saddr = saddr,
- .flowi4_tos = tos,
- .flowi4_proto = (inet->hdrincl ?
- IPPROTO_RAW :
- sk->sk_protocol),
- .flowi4_flags = FLOWI_FLAG_CAN_SLEEP,
- };
- if (!inet->hdrincl) {
- err = raw_probe_proto_opt(&fl4, msg);
- if (err)
- goto done;
- }
+ flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
+ RT_SCOPE_UNIVERSE,
+ inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
+ FLOWI_FLAG_CAN_SLEEP, daddr, saddr, 0, 0);
- security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
- rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
- if (IS_ERR(rt)) {
- err = PTR_ERR(rt);
- rt = NULL;
+ if (!inet->hdrincl) {
+ err = raw_probe_proto_opt(&fl4, msg);
+ if (err)
goto done;
- }
+ }
+
+ security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
+ rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
+ if (IS_ERR(rt)) {
+ err = PTR_ERR(rt);
+ rt = NULL;
+ goto done;
}
err = -EACCES;
@@ -583,19 +588,20 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
back_from_confirm:
if (inet->hdrincl)
- err = raw_send_hdrinc(sk, msg->msg_iov, len,
- &rt, msg->msg_flags);
+ err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len,
+ &rt, msg->msg_flags);
else {
if (!ipc.addr)
- ipc.addr = rt->rt_dst;
+ ipc.addr = fl4.daddr;
lock_sock(sk);
- err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
- &ipc, &rt, msg->msg_flags);
+ err = ip_append_data(sk, &fl4, ip_generic_getfrag,
+ msg->msg_iov, len, 0,
+ &ipc, &rt, msg->msg_flags);
if (err)
ip_flush_pending_frames(sk);
else if (!(msg->msg_flags & MSG_MORE)) {
- err = ip_push_pending_frames(sk);
+ err = ip_push_pending_frames(sk, &fl4);
if (err == -ENOBUFS && !inet->recverr)
err = 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-01 19:13:17 +0000