net/utils: Introduce inet_addr_is_any
Can be useful to check INET_ANY address for both ipv4/ipv6 addresses. Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -59,5 +59,6 @@ extern int in6_pton(const char *src, int srclen, u8 *dst, int delim, const char
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extern int inet_pton_with_scope(struct net *net, unsigned short af,
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const char *src, const char *port, struct sockaddr_storage *addr);
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extern bool inet_addr_is_any(struct sockaddr *addr);
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#endif /* _LINUX_INET_H */
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@ -403,6 +403,29 @@ int inet_pton_with_scope(struct net *net, __kernel_sa_family_t af,
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}
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EXPORT_SYMBOL(inet_pton_with_scope);
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bool inet_addr_is_any(struct sockaddr *addr)
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{
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if (addr->sa_family == AF_INET6) {
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struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)addr;
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const struct sockaddr_in6 in6_any =
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{ .sin6_addr = IN6ADDR_ANY_INIT };
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if (!memcmp(in6->sin6_addr.s6_addr,
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in6_any.sin6_addr.s6_addr, 16))
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return true;
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} else if (addr->sa_family == AF_INET) {
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struct sockaddr_in *in = (struct sockaddr_in *)addr;
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if (in->sin_addr.s_addr == htonl(INADDR_ANY))
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return true;
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} else {
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pr_warn("unexpected address family %u\n", addr->sa_family);
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}
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return false;
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}
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EXPORT_SYMBOL(inet_addr_is_any);
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void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
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__be32 from, __be32 to, bool pseudohdr)
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{
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