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Rev 4738 Rev 4743
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int tl_get_address_port( const struct sockaddr * addr, int addrlen, uint16_t * port ){
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int tl_get_address_port( const struct sockaddr * addr, int addrlen, uint16_t * port ){
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    const struct sockaddr_in *  address_in;
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    const struct sockaddr_in *  address_in;
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    const struct sockaddr_in6 * address_in6;
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    const struct sockaddr_in6 * address_in6;
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    if( addrlen < sizeof( struct sockaddr )) return EINVAL;
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    if(( addrlen <= 0 ) || (( size_t ) addrlen < sizeof( struct sockaddr ))) return EINVAL;
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    switch( addr->sa_family ){
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    switch( addr->sa_family ){
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        case AF_INET:
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        case AF_INET:
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            if( addrlen != sizeof( struct sockaddr_in )) return EINVAL;
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            if( addrlen != sizeof( struct sockaddr_in )) return EINVAL;
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            address_in = ( struct sockaddr_in * ) addr;
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            address_in = ( struct sockaddr_in * ) addr;
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            * port = ntohs( address_in->sin_port );
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            * port = ntohs( address_in->sin_port );