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add match(), isnone() utility function

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match() checks address family, IP address and port between
two sockaddr_storages.

isnone() checks sockaddr_storage has INADDR_NONE IPv4 address.
(sockaddr_storage has this address when lookup() failed)
This commit is contained in:
SASANO Takayoshi 2020-03-28 04:37:51 +09:00
parent 022d1a768b
commit 5dccd5c5ce
2 changed files with 33 additions and 0 deletions
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31
UDPSocket.cpp
View file

@ -86,6 +86,37 @@ int CUDPSocket::lookup(const std::string& hostname, unsigned int port, sockaddr_
return 0;
}
bool CUDPSocket::match(const sockaddr_storage &addr1, const sockaddr_storage &addr2)
{
if (addr1.ss_family != addr2.ss_family)
return false;
switch (addr1.ss_family) {
case AF_INET:
struct sockaddr_in *in_1, *in_2;
in_1 = (struct sockaddr_in *)&addr1;
in_2 = (struct sockaddr_in *)&addr2;
return ( (in_1->sin_addr.s_addr == in_2->sin_addr.s_addr) &&
(in_1->sin_port == in_2->sin_port) );
case AF_INET6:
struct sockaddr_in6 *in6_1, *in6_2;
in6_1 = (struct sockaddr_in6 *)&addr1;
in6_2 = (struct sockaddr_in6 *)&addr2;
return ( IN6_ARE_ADDR_EQUAL(&in6_1->sin6_addr, &in6_2->sin6_addr) &&
(in6_1->sin6_port == in6_2->sin6_port) );
default:
return false;
}
}
bool CUDPSocket::isnone(const sockaddr_storage &addr)
{
struct sockaddr_in *in = (struct sockaddr_in *)&addr;
return ( (addr.ss_family == AF_INET) &&
(in->sin_addr.s_addr == htonl(INADDR_NONE)) );
}
bool CUDPSocket::open()
{
int err;

2
UDPSocket.h
View file

@ -49,6 +49,8 @@ public:
void close();
static int lookup(const std::string& hostName, unsigned int port, sockaddr_storage &address, unsigned int &address_length);
static bool match(const sockaddr_storage &addr1, const sockaddr_storage &addr2);
static bool isnone(const sockaddr_storage &addr);
private:
std::string m_address;