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| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2006-06-17 22:55:35 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-06-17 22:55:35 -0700 |
| commit | 5636bef7324f49e36f05ec8a5f6284e11b1bcca4 (patch) | |
| tree | b5e9e42560ba86ffbbd63a582df87844996b6d03 /net/sctp | |
| parent | 402d68c43326d2f0e7e2e9a9013cd4c098d9b87c (diff) | |
| download | lwn-5636bef7324f49e36f05ec8a5f6284e11b1bcca4.tar.gz lwn-5636bef7324f49e36f05ec8a5f6284e11b1bcca4.zip | |
[SCTP]: Reject sctp packets with broadcast addresses.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/input.c | 3 | ||||
| -rw-r--r-- | net/sctp/ipv6.c | 6 | ||||
| -rw-r--r-- | net/sctp/protocol.c | 8 | ||||
| -rw-r--r-- | net/sctp/socket.c | 2 |
4 files changed, 14 insertions, 5 deletions
diff --git a/net/sctp/input.c b/net/sctp/input.c index 1662f9cc869e..70d6606e2812 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -170,7 +170,8 @@ int sctp_rcv(struct sk_buff *skb) * IP broadcast addresses cannot be used in an SCTP transport * address." */ - if (!af->addr_valid(&src, NULL) || !af->addr_valid(&dest, NULL)) + if (!af->addr_valid(&src, NULL, skb) || + !af->addr_valid(&dest, NULL, skb)) goto discard_it; asoc = __sctp_rcv_lookup(skb, &src, &dest, &transport); diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index c20d282fac06..8ef08070c8b6 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -523,7 +523,9 @@ static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) * Return 0 - If the address is a non-unicast or an illegal address. * Return 1 - If the address is a unicast. */ -static int sctp_v6_addr_valid(union sctp_addr *addr, struct sctp_sock *sp) +static int sctp_v6_addr_valid(union sctp_addr *addr, + struct sctp_sock *sp, + const struct sk_buff *skb) { int ret = ipv6_addr_type(&addr->v6.sin6_addr); @@ -537,7 +539,7 @@ static int sctp_v6_addr_valid(union sctp_addr *addr, struct sctp_sock *sp) if (sp && ipv6_only_sock(sctp_opt2sk(sp))) return 0; sctp_v6_map_v4(addr); - return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp); + return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); } /* Is this a non-unicast address */ diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index 2088aa992b7a..816c033d7886 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -365,12 +365,18 @@ static int sctp_v4_is_any(const union sctp_addr *addr) * Return 0 - If the address is a non-unicast or an illegal address. * Return 1 - If the address is a unicast. */ -static int sctp_v4_addr_valid(union sctp_addr *addr, struct sctp_sock *sp) +static int sctp_v4_addr_valid(union sctp_addr *addr, + struct sctp_sock *sp, + const struct sk_buff *skb) { /* Is this a non-unicast address or a unusable SCTP address? */ if (IS_IPV4_UNUSABLE_ADDRESS(&addr->v4.sin_addr.s_addr)) return 0; + /* Is this a broadcast address? */ + if (skb && ((struct rtable *)skb->dst)->rt_flags & RTCF_BROADCAST) + return 0; + return 1; } diff --git a/net/sctp/socket.c b/net/sctp/socket.c index b41dcbb89685..b811691c35bf 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -172,7 +172,7 @@ static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, return -EINVAL; /* Is this a valid SCTP address? */ - if (!af->addr_valid(addr, sctp_sk(sk))) + if (!af->addr_valid(addr, sctp_sk(sk), NULL)) return -EINVAL; if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) |