From mboxrd@z Thu Jan 1 00:00:00 1970 From: sagi@grimberg.me (Sagi Grimberg) Date: Tue, 6 Feb 2018 11:44:30 +0200 Subject: [PATCH 1/3] net/utils: Introduce inet_addr_is_any In-Reply-To: <20180206094432.12761-1-sagi@grimberg.me> References: <20180206094432.12761-1-sagi@grimberg.me> Message-ID: <20180206094432.12761-2-sagi@grimberg.me> Can be useful to check INET_ANY address for both ipv4/ipv6 addresses. Signed-off-by: Sagi Grimberg Cc: "David S. Miller" Cc: netdev at vger.kernel.org --- include/linux/inet.h | 1 + net/core/utils.c | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/linux/inet.h b/include/linux/inet.h index 636ebe87e6f8..97defc1139e9 100644 --- a/include/linux/inet.h +++ b/include/linux/inet.h @@ -59,5 +59,6 @@ extern int in6_pton(const char *src, int srclen, u8 *dst, int delim, const char extern int inet_pton_with_scope(struct net *net, unsigned short af, const char *src, const char *port, struct sockaddr_storage *addr); +extern bool inet_addr_is_any(struct sockaddr *addr); #endif /* _LINUX_INET_H */ diff --git a/net/core/utils.c b/net/core/utils.c index 93066bd0305a..a6e21111e523 100644 --- a/net/core/utils.c +++ b/net/core/utils.c @@ -403,6 +403,29 @@ int inet_pton_with_scope(struct net *net, __kernel_sa_family_t af, } EXPORT_SYMBOL(inet_pton_with_scope); +bool inet_addr_is_any(struct sockaddr *addr) +{ + bool ret = false; + + if (addr->sa_family == AF_INET6) { + struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)addr; + const struct sockaddr_in6 in6_any = + { .sin6_addr = IN6ADDR_ANY_INIT }; + + if (!memcmp(in6->sin6_addr.s6_addr, + in6_any.sin6_addr.s6_addr, 16)) + ret = true; + } else if (addr->sa_family == AF_INET) { + struct sockaddr_in *in = (struct sockaddr_in *)addr; + + if (in->sin_addr.s_addr == htonl(INADDR_ANY)) + ret = true; + } + + return ret; +} +EXPORT_SYMBOL(inet_addr_is_any); + void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb, __be32 from, __be32 to, bool pseudohdr) { -- 2.14.1