ipv4: route non-local sources for raw socket

The raw sockets can provide source address for
routing but their privileges are not considered. We
can provide non-local source address, make sure the
FLOWI_FLAG_ANYSRC flag is set if socket has privileges
for this, i.e. based on hdrincl (IP_HDRINCL) and
transparent flags.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index caaff5f..b897d6e 100644 (file)
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -238,7 +238,7 @@ static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
 {
        __u8 flags = 0;
 
-       if (inet_sk(sk)->transparent)
+       if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl)
                flags |= FLOWI_FLAG_ANYSRC;
        if (sk->sk_protocol == IPPROTO_TCP)
                flags |= FLOWI_FLAG_PRECOW_METRICS;

diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 1457acb..61714bd 100644 (file)
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -563,7 +563,8 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
        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);
+                          inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP,
+                          daddr, saddr, 0, 0);
 
        if (!inet->hdrincl) {
                err = raw_probe_proto_opt(&fl4, msg);